Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs pile 1 from Al Viro:
"This is _not_ all; in particular, Miklos' and Jan's stuff is not there
yet."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (64 commits)
ext4: initialization of ext4_li_mtx needs to be done earlier
debugfs-related mode_t whack-a-mole
hfsplus: add an ioctl to bless files
hfsplus: change finder_info to u32
hfsplus: initialise userflags
qnx4: new helper - try_extent()
qnx4: get rid of qnx4_bread/qnx4_getblk
take removal of PF_FORKNOEXEC to flush_old_exec()
trim includes in inode.c
um: uml_dup_mmap() relies on ->mmap_sem being held, but activate_mm() doesn't hold it
um: embed ->stub_pages[] into mmu_context
gadgetfs: list_for_each_safe() misuse
ocfs2: fix leaks on failure exits in module_init
ecryptfs: make register_filesystem() the last potential failure exit
ntfs: forgets to unregister sysctls on register_filesystem() failure
logfs: missing cleanup on register_filesystem() failure
jfs: mising cleanup on register_filesystem() failure
make configfs_pin_fs() return root dentry on success
configfs: configfs_create_dir() has parent dentry in dentry->d_parent
configfs: sanitize configfs_create()
...

Documentation/filesystems/debugfs.txt

···
 	void __iomem *base;
     };
 
-    struct dentry *debugfs_create_regset32(const char *name, mode_t mode,
+    struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
 				     struct dentry *parent,
 				     struct debugfs_regset32 *regset);
 

Documentation/filesystems/porting

···
 You must also keep in mind that ->fsync() is not called with i_mutex held
 anymore, so if you require i_mutex locking you must make sure to take it and
 release it yourself.
+
+--
+[mandatory]
+	d_alloc_root() is gone, along with a lot of bugs caused by code
+misusing it.  Replacement: d_make_root(inode).  The difference is,
+d_make_root() drops the reference to inode if dentry allocation fails.  

Documentation/filesystems/qnx6.txt

···
+The QNX6 Filesystem
+===================
+
+The qnx6fs is used by newer QNX operating system versions. (e.g. Neutrino)
+It got introduced in QNX 6.4.0 and is used default since 6.4.1.
+
+Option
+======
+
+mmi_fs		Mount filesystem as used for example by Audi MMI 3G system
+
+Specification
+=============
+
+qnx6fs shares many properties with traditional Unix filesystems. It has the
+concepts of blocks, inodes and directories.
+On QNX it is possible to create little endian and big endian qnx6 filesystems.
+This feature makes it possible to create and use a different endianness fs
+for the target (QNX is used on quite a range of embedded systems) plattform
+running on a different endianess.
+The Linux driver handles endianness transparently. (LE and BE)
+
+Blocks
+------
+
+The space in the device or file is split up into blocks. These are a fixed
+size of 512, 1024, 2048 or 4096, which is decided when the filesystem is
+created.
+Blockpointers are 32bit, so the maximum space that can be adressed is
+2^32 * 4096 bytes or 16TB
+
+The superblocks
+---------------
+
+The superblock contains all global information about the filesystem.
+Each qnx6fs got two superblocks, each one having a 64bit serial number.
+That serial number is used to identify the "active" superblock.
+In write mode with reach new snapshot (after each synchronous write), the
+serial of the new master superblock is increased (old superblock serial + 1)
+
+So basically the snapshot functionality is realized by an atomic final
+update of the serial number. Before updating that serial, all modifications
+are done by copying all modified blocks during that specific write request
+(or period) and building up a new (stable) filesystem structure under the
+inactive superblock.
+
+Each superblock holds a set of root inodes for the different filesystem
+parts. (Inode, Bitmap and Longfilenames)
+Each of these root nodes holds information like total size of the stored
+data and the adressing levels in that specific tree.
+If the level value is 0, up to 16 direct blocks can be adressed by each
+node.
+Level 1 adds an additional indirect adressing level where each indirect
+adressing block holds up to blocksize / 4 bytes pointers to data blocks.
+Level 2 adds an additional indirect adressig block level (so, already up
+to 16 * 256 * 256 = 1048576 blocks that can be adressed by such a tree)a
+
+Unused block pointers are always set to ~0 - regardless of root node,
+indirect adressing blocks or inodes.
+Data leaves are always on the lowest level. So no data is stored on upper
+tree levels.
+
+The first Superblock is located at 0x2000. (0x2000 is the bootblock size)
+The Audi MMI 3G first superblock directly starts at byte 0.
+Second superblock position can either be calculated from the superblock
+information (total number of filesystem blocks) or by taking the highest
+device address, zeroing the last 3 bytes and then substracting 0x1000 from
+that address.
+
+0x1000 is the size reserved for each superblock - regardless of the
+blocksize of the filesystem.
+
+Inodes
+------
+
+Each object in the filesystem is represented by an inode. (index node)
+The inode structure contains pointers to the filesystem blocks which contain
+the data held in the object and all of the metadata about an object except
+its longname. (filenames longer than 27 characters)
+The metadata about an object includes the permissions, owner, group, flags,
+size, number of blocks used, access time, change time and modification time.
+
+Object mode field is POSIX format. (which makes things easier)
+
+There are also pointers to the first 16 blocks, if the object data can be
+adressed with 16 direct blocks.
+For more than 16 blocks an indirect adressing in form of another tree is
+used. (scheme is the same as the one used for the superblock root nodes)
+
+The filesize is stored 64bit. Inode counting starts with 1. (whilst long
+filename inodes start with 0)
+
+Directories
+-----------
+
+A directory is a filesystem object and has an inode just like a file.
+It is a specially formatted file containing records which associate each
+name with an inode number.
+'.' inode number points to the directory inode
+'..' inode number points to the parent directory inode
+Eeach filename record additionally got a filename length field.
+
+One special case are long filenames or subdirectory names.
+These got set a filename length field of 0xff in the corresponding directory
+record plus the longfile inode number also stored in that record.
+With that longfilename inode number, the longfilename tree can be walked
+starting with the superblock longfilename root node pointers.
+
+Special files
+-------------
+
+Symbolic links are also filesystem objects with inodes. They got a specific
+bit in the inode mode field identifying them as symbolic link.
+The directory entry file inode pointer points to the target file inode.
+
+Hard links got an inode, a directory entry, but a specific mode bit set,
+no block pointers and the directory file record pointing to the target file
+inode.
+
+Character and block special devices do not exist in QNX as those files
+are handled by the QNX kernel/drivers and created in /dev independant of the
+underlaying filesystem.
+
+Long filenames
+--------------
+
+Long filenames are stored in a seperate adressing tree. The staring point
+is the longfilename root node in the active superblock.
+Each data block (tree leaves) holds one long filename. That filename is
+limited to 510 bytes. The first two starting bytes are used as length field
+for the actual filename.
+If that structure shall fit for all allowed blocksizes, it is clear why there
+is a limit of 510 bytes for the actual filename stored.
+
+Bitmap
+------
+
+The qnx6fs filesystem allocation bitmap is stored in a tree under bitmap
+root node in the superblock and each bit in the bitmap represents one
+filesystem block.
+The first block is block 0, which starts 0x1000 after superblock start.
+So for a normal qnx6fs 0x3000 (bootblock + superblock) is the physical
+address at which block 0 is located.
+
+Bits at the end of the last bitmap block are set to 1, if the device is
+smaller than addressing space in the bitmap.
+
+Bitmap system area
+------------------
+
+The bitmap itself is devided into three parts.
+First the system area, that is split into two halfs.
+Then userspace.
+
+The requirement for a static, fixed preallocated system area comes from how
+qnx6fs deals with writes.
+Each superblock got it's own half of the system area. So superblock #1
+always uses blocks from the lower half whilst superblock #2 just writes to
+blocks represented by the upper half bitmap system area bits.
+
+Bitmap blocks, Inode blocks and indirect addressing blocks for those two
+tree structures are treated as system blocks.
+
+The rational behind that is that a write request can work on a new snapshot
+(system area of the inactive - resp. lower serial numbered superblock) while
+at the same time there is still a complete stable filesystem structer in the
+other half of the system area.
+
+When finished with writing (a sync write is completed, the maximum sync leap
+time or a filesystem sync is requested), serial of the previously inactive
+superblock atomically is increased and the fs switches over to that - then
+stable declared - superblock.
+
+For all data outside the system area, blocks are just copied while writing.

Documentation/ioctl/ioctl-number.txt

···
 'h'	00-7F				conflict! Charon filesystem
 					<mailto:[e-mail]>
 'h'	00-1F	linux/hpet.h		conflict!
+'h'	80-8F	fs/hfsplus/ioctl.c
 'i'	00-3F	linux/i2o-dev.h		conflict!
 'i'	0B-1F	linux/ipmi.h		conflict!
 'i'	80-8F	linux/i8k.h

arch/alpha/kernel/binfmt_loader.c

···
 
 static int __init init_loader_binfmt(void)
 {
-	return insert_binfmt(&loader_format);
+	insert_binfmt(&loader_format);
+	return 0;
 }
 arch_initcall(init_loader_binfmt);

arch/powerpc/platforms/cell/spufs/inode.c

···
 		goto out_iput;
 
 	ret = -ENOMEM;
-	sb->s_root = d_alloc_root(inode);
+	sb->s_root = d_make_root(inode);
 	if (!sb->s_root)
-		goto out_iput;
+		goto out;
 
 	return 0;
 out_iput:
···
 	ret = spu_sched_init();
 	if (ret)
 		goto out_cache;
-	ret = register_filesystem(&spufs_type);
-	if (ret)
-		goto out_sched;
 	ret = register_spu_syscalls(&spufs_calls);
 	if (ret)
-		goto out_fs;
+		goto out_sched;
+	ret = register_filesystem(&spufs_type);
+	if (ret)
+		goto out_syscalls;
 
 	spufs_init_isolated_loader();
 
 	return 0;
 
-out_fs:
-	unregister_filesystem(&spufs_type);
+out_syscalls:
+	unregister_spu_syscalls(&spufs_calls);
 out_sched:
 	spu_sched_exit();
 out_cache:

arch/s390/hypfs/inode.c

···
 		return -ENOMEM;
 	root_inode->i_op = &simple_dir_inode_operations;
 	root_inode->i_fop = &simple_dir_operations;
-	sb->s_root = root_dentry = d_alloc_root(root_inode);
-	if (!root_dentry) {
-		iput(root_inode);
+	sb->s_root = root_dentry = d_make_root(root_inode);
+	if (!root_dentry)
 		return -ENOMEM;
-	}
 	if (MACHINE_IS_VM)
 		rc = hypfs_vm_create_files(sb, root_dentry);
 	else

arch/um/include/asm/mmu.h

···
 typedef struct mm_context {
 	struct mm_id id;
 	struct uml_arch_mm_context arch;
-	struct page **stub_pages;
+	struct page *stub_pages[2];
 } mm_context_t;
 
 extern void __switch_mm(struct mm_id * mm_idp);

arch/um/include/asm/mmu_context.h

···
 #include <linux/sched.h>
 #include <asm/mmu.h>
 
-extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
+extern void uml_setup_stubs(struct mm_struct *mm);
 extern void arch_exit_mmap(struct mm_struct *mm);
 
 #define deactivate_mm(tsk,mm)	do { } while (0)
···
 	 * when the new ->mm is used for the first time.
 	 */
 	__switch_mm(&new->context.id);
-	arch_dup_mmap(old, new);
+	down_write(&new->mmap_sem);
+	uml_setup_stubs(new);
+	up_write(&new->mmap_sem);
 }
 
 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
···
 		if(next != &init_mm)
 			__switch_mm(&next->context.id);
 	}
+}
+
+static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+{
+	uml_setup_stubs(mm);
 }
 
 static inline void enter_lazy_tlb(struct mm_struct *mm, 

arch/um/kernel/skas/mmu.c

···
 		goto out_free;
 	}
 
-	to_mm->stub_pages = NULL;
-
 	return 0;
 
  out_free:
···
 	return ret;
 }
 
-void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+void uml_setup_stubs(struct mm_struct *mm)
 {
 	struct page **pages;
 	int err, ret;
···
 	if (ret)
 		goto out;
 
-	pages = kmalloc(2 * sizeof(struct page *), GFP_KERNEL);
-	if (pages == NULL) {
-		printk(KERN_ERR "arch_dup_mmap failed to allocate 2 page "
-		       "pointers\n");
-		goto out;
-	}
-
-	pages[0] = virt_to_page(&__syscall_stub_start);
-	pages[1] = virt_to_page(mm->context.id.stack);
-	mm->context.stub_pages = pages;
+	mm->context.stub_pages[0] = virt_to_page(&__syscall_stub_start);
+	mm->context.stub_pages[1] = virt_to_page(mm->context.id.stack);
 
 	/* dup_mmap already holds mmap_sem */
 	err = install_special_mapping(mm, STUB_START, STUB_END - STUB_START,
 				      VM_READ | VM_MAYREAD | VM_EXEC |
-				      VM_MAYEXEC | VM_DONTCOPY, pages);
+				      VM_MAYEXEC | VM_DONTCOPY,
+				      mm->context.stub_pages);
 	if (err) {
 		printk(KERN_ERR "install_special_mapping returned %d\n", err);
-		goto out_free;
+		goto out;
 	}
 	return;
 
-out_free:
-	kfree(pages);
 out:
 	force_sigsegv(SIGSEGV, current);
 }
···
 {
 	pte_t *pte;
 
-	if (mm->context.stub_pages != NULL)
-		kfree(mm->context.stub_pages);
 	pte = virt_to_pte(mm, STUB_CODE);
 	if (pte != NULL)
 		pte_clear(mm, STUB_CODE, pte);

arch/x86/ia32/ia32_aout.c

···
 	}
 
 	install_exec_creds(bprm);
-	current->flags &= ~PF_FORKNOEXEC;
 
 	if (N_MAGIC(ex) == OMAGIC) {
 		unsigned long text_addr, map_size;
···
 
 static int __init init_aout_binfmt(void)
 {
-	return register_binfmt(&aout_format);
+	register_binfmt(&aout_format);
+	return 0;
 }
 
 static void __exit exit_aout_binfmt(void)

drivers/misc/ibmasm/ibmasmfs.c

···
 static LIST_HEAD(service_processors);
 
 static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode);
-static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root);
+static void ibmasmfs_create_files (struct super_block *sb);
 static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent);
 
 
···
 static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
 {
 	struct inode *root;
-	struct dentry *root_dentry;
 
 	sb->s_blocksize = PAGE_CACHE_SIZE;
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
···
 	root->i_op = &simple_dir_inode_operations;
 	root->i_fop = ibmasmfs_dir_ops;
 
-	root_dentry = d_alloc_root(root);
-	if (!root_dentry) {
-		iput(root);
+	sb->s_root = d_make_root(root);
+	if (!sb->s_root)
 		return -ENOMEM;
-	}
-	sb->s_root = root_dentry;
 
-	ibmasmfs_create_files(sb, root_dentry);
+	ibmasmfs_create_files(sb);
 	return 0;
 }
 
···
 };
 
 
-static void ibmasmfs_create_files (struct super_block *sb, struct dentry *root)
+static void ibmasmfs_create_files (struct super_block *sb)
 {
 	struct list_head *entry;
 	struct service_processor *sp;
···
 		struct dentry *dir;
 		struct dentry *remote_dir;
 		sp = list_entry(entry, struct service_processor, node);
-		dir = ibmasmfs_create_dir(sb, root, sp->dirname);
+		dir = ibmasmfs_create_dir(sb, sb->s_root, sp->dirname);
 		if (!dir)
 			continue;
 

drivers/misc/ibmasm/module.c

···
 
 static int __init ibmasm_init(void)
 {
-	int result;
+	int result = pci_register_driver(&ibmasm_driver);
+	if (result)
+		return result;
 
 	result = ibmasmfs_register();
 	if (result) {
+		pci_unregister_driver(&ibmasm_driver);
 		err("Failed to register ibmasmfs file system");
 		return result;
 	}
-	result = pci_register_driver(&ibmasm_driver);
-	if (result) {
-		ibmasmfs_unregister();
-		return result;
-	}
+
 	ibmasm_register_panic_notifier();
 	info(DRIVER_DESC " version " DRIVER_VERSION " loaded");
 	return 0;

drivers/mmc/card/block.c

···
 
 	if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
 	     card->ext_csd.boot_ro_lockable) {
-		mode_t mode;
+		umode_t mode;
 
 		if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
 			mode = S_IRUGO;

drivers/net/ethernet/brocade/bna/bnad_debugfs.c

···
 
 struct bnad_debugfs_entry {
 	const char *name;
-	mode_t  mode;
+	umode_t  mode;
 	const struct file_operations *fops;
 };
 

drivers/oprofile/oprofilefs.c

···
 static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct inode *root_inode;
-	struct dentry *root_dentry;
 
 	sb->s_blocksize = PAGE_CACHE_SIZE;
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
···
 		return -ENOMEM;
 	root_inode->i_op = &simple_dir_inode_operations;
 	root_inode->i_fop = &simple_dir_operations;
-	root_dentry = d_alloc_root(root_inode);
-	if (!root_dentry) {
-		iput(root_inode);
+	sb->s_root = d_make_root(root_inode);
+	if (!sb->s_root)
 		return -ENOMEM;
-	}
 
-	sb->s_root = root_dentry;
-
-	oprofile_create_files(sb, root_dentry);
+	oprofile_create_files(sb, sb->s_root);
 
 	// FIXME: verify kill_litter_super removes our dentries
 	return 0;

drivers/usb/core/inode.c

···
 static const struct file_operations default_file_operations;
 static struct vfsmount *usbfs_mount;
 static int usbfs_mount_count;	/* = 0 */
-static int ignore_mount = 0;
 
 static struct dentry *devices_usbfs_dentry;
 static int num_buses;	/* = 0 */
···
 	 * i.e. it's a simple_pin_fs from create_special_files,
 	 * then ignore it.
 	 */
-	if (ignore_mount)
+	if (*flags & MS_KERNMOUNT)
 		return 0;
 
 	if (parse_options(sb, data)) {
···
 static int usbfs_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct inode *inode;
-	struct dentry *root;
 
 	sb->s_blocksize = PAGE_CACHE_SIZE;
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
···
 	sb->s_op = &usbfs_ops;
 	sb->s_time_gran = 1;
 	inode = usbfs_get_inode(sb, S_IFDIR | 0755, 0);
-
-	if (!inode) {
-		dbg("%s: could not get inode!",__func__);
-		return -ENOMEM;
-	}
-
-	root = d_alloc_root(inode);
-	if (!root) {
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root) {
 		dbg("%s: could not get root dentry!",__func__);
-		iput(inode);
 		return -ENOMEM;
 	}
-	sb->s_root = root;
 	return 0;
 }
 
···
 	struct dentry *parent;
 	int retval;
 
-	/* the simple_pin_fs calls will call remount with no options
-	 * without this flag that would overwrite the real mount options (if any)
-	 */
-	ignore_mount = 1;
-
 	/* create the devices special file */
 	retval = simple_pin_fs(&usb_fs_type, &usbfs_mount, &usbfs_mount_count);
 	if (retval) {
 		printk(KERN_ERR "Unable to get usbfs mount\n");
 		goto exit;
 	}
-
-	ignore_mount = 0;
 
 	parent = usbfs_mount->mnt_root;
 	devices_usbfs_dentry = fs_create_file ("devices",

drivers/usb/gadget/f_fs.c

···
 				  &simple_dir_operations,
 				  &simple_dir_inode_operations,
 				  &data->perms);
-	if (unlikely(!inode))
+	sb->s_root = d_make_root(inode);
+	if (unlikely(!sb->s_root))
 		goto Enomem;
-	sb->s_root = d_alloc_root(inode);
-	if (unlikely(!sb->s_root)) {
-		iput(inode);
-		goto Enomem;
-	}
 
 	/* EP0 file */
 	if (unlikely(!ffs_sb_create_file(sb, "ep0", ffs,

drivers/usb/gadget/inode.c

···
 
 static void destroy_ep_files (struct dev_data *dev)
 {
-	struct list_head	*entry, *tmp;
-
 	DBG (dev, "%s %d\n", __func__, dev->state);
 
 	/* dev->state must prevent interference */
 restart:
 	spin_lock_irq (&dev->lock);
-	list_for_each_safe (entry, tmp, &dev->epfiles) {
+	while (!list_empty(&dev->epfiles)) {
 		struct ep_data	*ep;
 		struct inode	*parent;
 		struct dentry	*dentry;
 
 		/* break link to FS */
-		ep = list_entry (entry, struct ep_data, epfiles);
+		ep = list_first_entry (&dev->epfiles, struct ep_data, epfiles);
 		list_del_init (&ep->epfiles);
 		dentry = ep->dentry;
 		ep->dentry = NULL;
···
 		dput (dentry);
 		mutex_unlock (&parent->i_mutex);
 
-		/* fds may still be open */
-		goto restart;
+		spin_lock_irq (&dev->lock);
 	}
 	spin_unlock_irq (&dev->lock);
 }
···
 	if (!inode)
 		goto Enomem;
 	inode->i_op = &simple_dir_inode_operations;
-	if (!(sb->s_root = d_alloc_root (inode))) {
-		iput(inode);
+	if (!(sb->s_root = d_make_root (inode)))
 		goto Enomem;
-	}
 
 	/* the ep0 file is named after the controller we expect;
 	 * user mode code can use it for sanity checks, like we do.

fs/9p/v9fs.c

···
 	int err;
 	pr_info("Installing v9fs 9p2000 file system support\n");
 	/* TODO: Setup list of registered trasnport modules */
-	err = register_filesystem(&v9fs_fs_type);
-	if (err < 0) {
-		pr_err("Failed to register filesystem\n");
-		return err;
-	}
 
 	err = v9fs_cache_register();
 	if (err < 0) {
 		pr_err("Failed to register v9fs for caching\n");
-		goto out_fs_unreg;
+		return err;
 	}
 
 	err = v9fs_sysfs_init();
 	if (err < 0) {
 		pr_err("Failed to register with sysfs\n");
+		goto out_cache;
+	}
+	err = register_filesystem(&v9fs_fs_type);
+	if (err < 0) {
+		pr_err("Failed to register filesystem\n");
 		goto out_sysfs_cleanup;
 	}
 
···
 out_sysfs_cleanup:
 	v9fs_sysfs_cleanup();
 
-out_fs_unreg:
-	unregister_filesystem(&v9fs_fs_type);
+out_cache:
+	v9fs_cache_unregister();
 
 	return err;
 }

fs/9p/vfs_super.c

···
 		goto release_sb;
 	}
 
-	root = d_alloc_root(inode);
+	root = d_make_root(inode);
 	if (!root) {
-		iput(inode);
 		retval = -ENOMEM;
 		goto release_sb;
 	}

fs/Kconfig

···
 source "fs/omfs/Kconfig"
 source "fs/hpfs/Kconfig"
 source "fs/qnx4/Kconfig"
+source "fs/qnx6/Kconfig"
 source "fs/romfs/Kconfig"
 source "fs/pstore/Kconfig"
 source "fs/sysv/Kconfig"

fs/Makefile

···
 obj-$(CONFIG_AFFS_FS)		+= affs/
 obj-$(CONFIG_ROMFS_FS)		+= romfs/
 obj-$(CONFIG_QNX4FS_FS)		+= qnx4/
+obj-$(CONFIG_QNX6FS_FS)		+= qnx6/
 obj-$(CONFIG_AUTOFS4_FS)	+= autofs4/
 obj-$(CONFIG_ADFS_FS)		+= adfs/
 obj-$(CONFIG_FUSE_FS)		+= fuse/

fs/adfs/super.c

···
 
 	sb->s_d_op = &adfs_dentry_operations;
 	root = adfs_iget(sb, &root_obj);
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		int i;
-		iput(root);
 		for (i = 0; i < asb->s_map_size; i++)
 			brelse(asb->s_map[i].dm_bh);
 		kfree(asb->s_map);

fs/affs/super.c

···
 	root_inode = affs_iget(sb, root_block);
 	if (IS_ERR(root_inode)) {
 		ret = PTR_ERR(root_inode);
-		goto out_error_noinode;
+		goto out_error;
 	}
 
 	if (AFFS_SB(sb)->s_flags & SF_INTL)
···
 	else
 		sb->s_d_op = &affs_dentry_operations;
 
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
 	if (!sb->s_root) {
 		printk(KERN_ERR "AFFS: Get root inode failed\n");
 		goto out_error;
···
 	 * Begin the cascaded cleanup ...
 	 */
 out_error:
-	if (root_inode)
-		iput(root_inode);
-out_error_noinode:
 	kfree(sbi->s_bitmap);
 	affs_brelse(root_bh);
 	kfree(sbi->s_prefix);

fs/afs/super.c

···
 {
 	struct afs_super_info *as = sb->s_fs_info;
 	struct afs_fid fid;
-	struct dentry *root = NULL;
 	struct inode *inode = NULL;
 	int ret;
 
···
 		set_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(inode)->flags);
 
 	ret = -ENOMEM;
-	root = d_alloc_root(inode);
-	if (!root)
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root)
 		goto error;
 
 	sb->s_d_op = &afs_fs_dentry_operations;
-	sb->s_root = root;
 
 	_leave(" = 0");
 	return 0;
 
 error:
-	iput(inode);
 	_leave(" = %d", ret);
 	return ret;
 }

fs/aio.c

···
 static void ctx_rcu_free(struct rcu_head *head)
 {
 	struct kioctx *ctx = container_of(head, struct kioctx, rcu_head);
-	unsigned nr_events = ctx->max_reqs;
-
 	kmem_cache_free(kioctx_cachep, ctx);
-
-	if (nr_events) {
-		spin_lock(&aio_nr_lock);
-		BUG_ON(aio_nr - nr_events > aio_nr);
-		aio_nr -= nr_events;
-		spin_unlock(&aio_nr_lock);
-	}
 }
 
 /* __put_ioctx
···
  */
 static void __put_ioctx(struct kioctx *ctx)
 {
+	unsigned nr_events = ctx->max_reqs;
 	BUG_ON(ctx->reqs_active);
 
-	cancel_delayed_work(&ctx->wq);
-	cancel_work_sync(&ctx->wq.work);
+	cancel_delayed_work_sync(&ctx->wq);
 	aio_free_ring(ctx);
 	mmdrop(ctx->mm);
 	ctx->mm = NULL;
+	if (nr_events) {
+		spin_lock(&aio_nr_lock);
+		BUG_ON(aio_nr - nr_events > aio_nr);
+		aio_nr -= nr_events;
+		spin_unlock(&aio_nr_lock);
+	}
 	pr_debug("__put_ioctx: freeing %p\n", ctx);
 	call_rcu(&ctx->rcu_head, ctx_rcu_free);
 }
···
 {
 	struct mm_struct *mm;
 	struct kioctx *ctx;
-	int did_sync = 0;
+	int err = -ENOMEM;
 
 	/* Prevent overflows */
 	if ((nr_events > (0x10000000U / sizeof(struct io_event))) ||
···
 		return ERR_PTR(-EINVAL);
 	}
 
-	if ((unsigned long)nr_events > aio_max_nr)
+	if (!nr_events || (unsigned long)nr_events > aio_max_nr)
 		return ERR_PTR(-EAGAIN);
 
 	ctx = kmem_cache_zalloc(kioctx_cachep, GFP_KERNEL);
···
 		goto out_freectx;
 
 	/* limit the number of system wide aios */
-	do {
-		spin_lock_bh(&aio_nr_lock);
-		if (aio_nr + nr_events > aio_max_nr ||
-		    aio_nr + nr_events < aio_nr)
-			ctx->max_reqs = 0;
-		else
-			aio_nr += ctx->max_reqs;
-		spin_unlock_bh(&aio_nr_lock);
-		if (ctx->max_reqs || did_sync)
-			break;
-
-		/* wait for rcu callbacks to have completed before giving up */
-		synchronize_rcu();
-		did_sync = 1;
-		ctx->max_reqs = nr_events;
-	} while (1);
-
-	if (ctx->max_reqs == 0)
+	spin_lock(&aio_nr_lock);
+	if (aio_nr + nr_events > aio_max_nr ||
+	    aio_nr + nr_events < aio_nr) {
+		spin_unlock(&aio_nr_lock);
 		goto out_cleanup;
+	}
+	aio_nr += ctx->max_reqs;
+	spin_unlock(&aio_nr_lock);
 
 	/* now link into global list. */
 	spin_lock(&mm->ioctx_lock);
···
 	return ctx;
 
 out_cleanup:
-	__put_ioctx(ctx);
-	return ERR_PTR(-EAGAIN);
-
+	err = -EAGAIN;
+	aio_free_ring(ctx);
 out_freectx:
 	mmdrop(mm);
 	kmem_cache_free(kioctx_cachep, ctx);
-	ctx = ERR_PTR(-ENOMEM);
-
-	dprintk("aio: error allocating ioctx %p\n", ctx);
-	return ctx;
+	dprintk("aio: error allocating ioctx %d\n", err);
+	return ERR_PTR(err);
 }
 
 /* aio_cancel_all
···
 		aio_cancel_all(ctx);
 
 		wait_for_all_aios(ctx);
-		/*
-		 * Ensure we don't leave the ctx on the aio_wq
-		 */
-		cancel_work_sync(&ctx->wq.work);
 
 		if (1 != atomic_read(&ctx->users))
 			printk(KERN_DEBUG
···
  	unuse_mm(mm);
 	set_fs(oldfs);
 	/*
-	 * we're in a worker thread already, don't use queue_delayed_work,
+	 * we're in a worker thread already; no point using non-zero delay
 	 */
 	if (requeue)
 		queue_delayed_work(aio_wq, &ctx->wq, 0);

fs/anon_inodes.c

···
 	.d_dname	= anon_inodefs_dname,
 };
 
-static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type,
-				int flags, const char *dev_name, void *data)
-{
-	return mount_pseudo(fs_type, "anon_inode:", NULL,
-			&anon_inodefs_dentry_operations, ANON_INODE_FS_MAGIC);
-}
-
-static struct file_system_type anon_inode_fs_type = {
-	.name		= "anon_inodefs",
-	.mount		= anon_inodefs_mount,
-	.kill_sb	= kill_anon_super,
-};
-
 /*
  * nop .set_page_dirty method so that people can use .page_mkwrite on
  * anon inodes.
···
 
 static const struct address_space_operations anon_aops = {
 	.set_page_dirty = anon_set_page_dirty,
+};
+
+/*
+ * A single inode exists for all anon_inode files. Contrary to pipes,
+ * anon_inode inodes have no associated per-instance data, so we need
+ * only allocate one of them.
+ */
+static struct inode *anon_inode_mkinode(struct super_block *s)
+{
+	struct inode *inode = new_inode_pseudo(s);
+
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	inode->i_ino = get_next_ino();
+	inode->i_fop = &anon_inode_fops;
+
+	inode->i_mapping->a_ops = &anon_aops;
+
+	/*
+	 * Mark the inode dirty from the very beginning,
+	 * that way it will never be moved to the dirty
+	 * list because mark_inode_dirty() will think
+	 * that it already _is_ on the dirty list.
+	 */
+	inode->i_state = I_DIRTY;
+	inode->i_mode = S_IRUSR | S_IWUSR;
+	inode->i_uid = current_fsuid();
+	inode->i_gid = current_fsgid();
+	inode->i_flags |= S_PRIVATE;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	return inode;
+}
+
+static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type,
+				int flags, const char *dev_name, void *data)
+{
+	struct dentry *root;
+	root = mount_pseudo(fs_type, "anon_inode:", NULL,
+			&anon_inodefs_dentry_operations, ANON_INODE_FS_MAGIC);
+	if (!IS_ERR(root)) {
+		struct super_block *s = root->d_sb;
+		anon_inode_inode = anon_inode_mkinode(s);
+		if (IS_ERR(anon_inode_inode)) {
+			dput(root);
+			deactivate_locked_super(s);
+			root = ERR_CAST(anon_inode_inode);
+		}
+	}
+	return root;
+}
+
+static struct file_system_type anon_inode_fs_type = {
+	.name		= "anon_inodefs",
+	.mount		= anon_inodefs_mount,
+	.kill_sb	= kill_anon_super,
 };
 
 /**
···
 }
 EXPORT_SYMBOL_GPL(anon_inode_getfd);
 
-/*
- * A single inode exists for all anon_inode files. Contrary to pipes,
- * anon_inode inodes have no associated per-instance data, so we need
- * only allocate one of them.
- */
-static struct inode *anon_inode_mkinode(void)
-{
-	struct inode *inode = new_inode_pseudo(anon_inode_mnt->mnt_sb);
-
-	if (!inode)
-		return ERR_PTR(-ENOMEM);
-
-	inode->i_ino = get_next_ino();
-	inode->i_fop = &anon_inode_fops;
-
-	inode->i_mapping->a_ops = &anon_aops;
-
-	/*
-	 * Mark the inode dirty from the very beginning,
-	 * that way it will never be moved to the dirty
-	 * list because mark_inode_dirty() will think
-	 * that it already _is_ on the dirty list.
-	 */
-	inode->i_state = I_DIRTY;
-	inode->i_mode = S_IRUSR | S_IWUSR;
-	inode->i_uid = current_fsuid();
-	inode->i_gid = current_fsgid();
-	inode->i_flags |= S_PRIVATE;
-	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
-	return inode;
-}
-
 static int __init anon_inode_init(void)
 {
 	int error;
···
 		error = PTR_ERR(anon_inode_mnt);
 		goto err_unregister_filesystem;
 	}
-	anon_inode_inode = anon_inode_mkinode();
-	if (IS_ERR(anon_inode_inode)) {
-		error = PTR_ERR(anon_inode_inode);
-		goto err_mntput;
-	}
-
 	return 0;
 
-err_mntput:
-	kern_unmount(anon_inode_mnt);
 err_unregister_filesystem:
 	unregister_filesystem(&anon_inode_fs_type);
 err_exit:

fs/autofs4/init.c

···
 {
 	int err;
 
+	autofs_dev_ioctl_init();
+
 	err = register_filesystem(&autofs_fs_type);
 	if (err)
-		return err;
-
-	autofs_dev_ioctl_init();
+		autofs_dev_ioctl_exit();
 
 	return err;
 }

fs/autofs4/inode.c

···
 	if (!ino)
 		goto fail_free;
 	root_inode = autofs4_get_inode(s, S_IFDIR | 0755);
-	if (!root_inode)
-		goto fail_ino;
-
-	root = d_alloc_root(root_inode);
+	root = d_make_root(root_inode);
 	if (!root)
-		goto fail_iput;
+		goto fail_ino;
 	pipe = NULL;
 
 	root->d_fsdata = ino;
···
 fail_dput:
 	dput(root);
 	goto fail_free;
-fail_iput:
-	printk("autofs: get root dentry failed\n");
-	iput(root_inode);
 fail_ino:
 	kfree(ino);
 fail_free:

fs/befs/linuxvfs.c

···
 		ret = PTR_ERR(root);
 		goto unacquire_priv_sbp;
 	}
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
-		iput(root);
 		befs_error(sb, "get root inode failed");
 		goto unacquire_priv_sbp;
 	}

fs/bfs/inode.c

···
 		ret = PTR_ERR(inode);
 		goto out2;
 	}
-	s->s_root = d_alloc_root(inode);
+	s->s_root = d_make_root(inode);
 	if (!s->s_root) {
-		iput(inode);
 		ret = -ENOMEM;
 		goto out2;
 	}

fs/binfmt_aout.c

···
 	}
 
 	install_exec_creds(bprm);
- 	current->flags &= ~PF_FORKNOEXEC;
 
 	if (N_MAGIC(ex) == OMAGIC) {
 		unsigned long text_addr, map_size;
···
 
 static int __init init_aout_binfmt(void)
 {
-	return register_binfmt(&aout_format);
+	register_binfmt(&aout_format);
+	return 0;
 }
 
 static void __exit exit_aout_binfmt(void)

fs/binfmt_elf.c

···
 		goto out_free_dentry;
 
 	/* OK, This is the point of no return */
-	current->flags &= ~PF_FORKNOEXEC;
 	current->mm->def_flags = def_flags;
 
 	/* Do this immediately, since STACK_TOP as used in setup_arg_pages
···
 #endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */
 
 	install_exec_creds(bprm);
-	current->flags &= ~PF_FORKNOEXEC;
 	retval = create_elf_tables(bprm, &loc->elf_ex,
 			  load_addr, interp_load_addr);
 	if (retval < 0) {
···
 
 static int __init init_elf_binfmt(void)
 {
-	return register_binfmt(&elf_format);
+	register_binfmt(&elf_format);
+	return 0;
 }
 
 static void __exit exit_elf_binfmt(void)

fs/binfmt_elf_fdpic.c

···
 
 static int __init init_elf_fdpic_binfmt(void)
 {
-	return register_binfmt(&elf_fdpic_format);
+	register_binfmt(&elf_fdpic_format);
+	return 0;
 }
 
 static void __exit exit_elf_fdpic_binfmt(void)
···
 	current->mm->context.exec_fdpic_loadmap = 0;
 	current->mm->context.interp_fdpic_loadmap = 0;
 
-	current->flags &= ~PF_FORKNOEXEC;
-
 #ifdef CONFIG_MMU
 	elf_fdpic_arch_lay_out_mm(&exec_params,
 				  &interp_params,
···
 #endif
 
 	install_exec_creds(bprm);
-	current->flags &= ~PF_FORKNOEXEC;
 	if (create_elf_fdpic_tables(bprm, current->mm,
 				    &exec_params, &interp_params) < 0)
 		goto error_kill;

fs/binfmt_em86.c

···
 
 static int __init init_em86_binfmt(void)
 {
-	return register_binfmt(&em86_format);
+	register_binfmt(&em86_format);
+	return 0;
 }
 
 static void __exit exit_em86_binfmt(void)

fs/binfmt_flat.c

···
 						libinfo.lib_list[j].start_data:UNLOADED_LIB;
 
 	install_exec_creds(bprm);
- 	current->flags &= ~PF_FORKNOEXEC;
 
 	set_binfmt(&flat_format);
 
···
 
 static int __init init_flat_binfmt(void)
 {
-	return register_binfmt(&flat_format);
+	register_binfmt(&flat_format);
+	return 0;
 }
 
 /****************************************************************************/

fs/binfmt_misc.c

···
 static int __init init_misc_binfmt(void)
 {
 	int err = register_filesystem(&bm_fs_type);
-	if (!err) {
-		err = insert_binfmt(&misc_format);
-		if (err)
-			unregister_filesystem(&bm_fs_type);
-	}
+	if (!err)
+		insert_binfmt(&misc_format);
 	return err;
 }
 

fs/binfmt_script.c

···
 
 static int __init init_script_binfmt(void)
 {
-	return register_binfmt(&script_format);
+	register_binfmt(&script_format);
+	return 0;
 }
 
 static void __exit exit_script_binfmt(void)

fs/binfmt_som.c

···
 		goto out_free;
 
 	/* OK, This is the point of no return */
-	current->flags &= ~PF_FORKNOEXEC;
 	current->personality = PER_HPUX;
 	setup_new_exec(bprm);
 
···
 
 static int __init init_som_binfmt(void)
 {
-	return register_binfmt(&som_format);
+	register_binfmt(&som_format);
+	return 0;
 }
 
 static void __exit exit_som_binfmt(void)

fs/btrfs/super.c

···
 			    void *data, int silent)
 {
 	struct inode *inode;
-	struct dentry *root_dentry;
 	struct btrfs_fs_info *fs_info = btrfs_sb(sb);
 	struct btrfs_key key;
 	int err;
···
 		goto fail_close;
 	}
 
-	root_dentry = d_alloc_root(inode);
-	if (!root_dentry) {
-		iput(inode);
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root) {
 		err = -ENOMEM;
 		goto fail_close;
 	}
-
-	sb->s_root = root_dentry;
 
 	save_mount_options(sb, data);
 	cleancache_init_fs(sb);

fs/cachefiles/namei.c

···
 		 * (this is used to keep track of culling, and atimes are only
 		 * updated by read, write and readdir but not lookup or
 		 * open) */
-		touch_atime(cache->mnt, next);
+		path.dentry = next;
+		touch_atime(&path);
 	}
 
 	/* open a file interface onto a data file */

fs/ceph/super.c

···
 		dout("open_root_inode success\n");
 		if (ceph_ino(inode) == CEPH_INO_ROOT &&
 		    fsc->sb->s_root == NULL) {
-			root = d_alloc_root(inode);
+			root = d_make_root(inode);
 			if (!root) {
-				iput(inode);
 				root = ERR_PTR(-ENOMEM);
 				goto out;
 			}

fs/cifs/cifsfs.c

···
 
 	if (IS_ERR(inode)) {
 		rc = PTR_ERR(inode);
-		inode = NULL;
 		goto out_no_root;
 	}
 
-	sb->s_root = d_alloc_root(inode);
-
+	sb->s_root = d_make_root(inode);
 	if (!sb->s_root) {
 		rc = -ENOMEM;
 		goto out_no_root;
···
 
 out_no_root:
 	cERROR(1, "cifs_read_super: get root inode failed");
-	if (inode)
-		iput(inode);
-
 	return rc;
 }
 

fs/coda/inode.c

···
         if (IS_ERR(root)) {
 		error = PTR_ERR(root);
 		printk("Failure of coda_cnode_make for root: error %d\n", error);
-		root = NULL;
 		goto error;
 	} 
 
 	printk("coda_read_super: rootinode is %ld dev %s\n", 
 	       root->i_ino, root->i_sb->s_id);
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		error = -EINVAL;
 		goto error;
···
 	return 0;
 
 error:
-	if (root)
-		iput(root);
-
 	mutex_lock(&vc->vc_mutex);
 	bdi_destroy(&vc->bdi);
 	vc->vc_sb = NULL;

fs/configfs/configfs_internal.h

···
 extern struct mutex configfs_symlink_mutex;
 extern spinlock_t configfs_dirent_lock;
 
-extern struct vfsmount * configfs_mount;
 extern struct kmem_cache *configfs_dir_cachep;
 
 extern int configfs_is_root(struct config_item *item);
 
-extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *);
+extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *, struct super_block *);
 extern int configfs_create(struct dentry *, umode_t mode, int (*init)(struct inode *));
 extern int configfs_inode_init(void);
 extern void configfs_inode_exit(void);
···
 extern void configfs_drop_dentry(struct configfs_dirent *sd, struct dentry *parent);
 extern int configfs_setattr(struct dentry *dentry, struct iattr *iattr);
 
-extern int configfs_pin_fs(void);
+extern struct dentry *configfs_pin_fs(void);
 extern void configfs_release_fs(void);
 
 extern struct rw_semaphore configfs_rename_sem;
-extern struct super_block * configfs_sb;
 extern const struct file_operations configfs_dir_operations;
 extern const struct file_operations configfs_file_operations;
 extern const struct file_operations bin_fops;
 extern const struct inode_operations configfs_dir_inode_operations;
+extern const struct inode_operations configfs_root_inode_operations;
 extern const struct inode_operations configfs_symlink_inode_operations;
 extern const struct dentry_operations configfs_dentry_ops;
 

fs/configfs/dir.c

···
 	return 0;
 }
 
-static int create_dir(struct config_item * k, struct dentry * p,
-		      struct dentry * d)
+static int create_dir(struct config_item *k, struct dentry *d)
 {
 	int error;
 	umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
+	struct dentry *p = d->d_parent;
+
+	BUG_ON(!k);
 
 	error = configfs_dirent_exists(p->d_fsdata, d->d_name.name);
 	if (!error)
···
 
 static int configfs_create_dir(struct config_item * item, struct dentry *dentry)
 {
-	struct dentry * parent;
-	int error = 0;
-
-	BUG_ON(!item);
-
-	if (item->ci_parent)
-		parent = item->ci_parent->ci_dentry;
-	else if (configfs_mount)
-		parent = configfs_mount->mnt_root;
-	else
-		return -EFAULT;
-
-	error = create_dir(item,parent,dentry);
+	int error = create_dir(item, dentry);
 	if (!error)
 		item->ci_dentry = dentry;
 	return error;
···
 	int ret;
 	struct configfs_dirent *p, *root_sd, *subsys_sd = NULL;
 	struct config_item *s_item = &subsys->su_group.cg_item;
+	struct dentry *root;
 
 	/*
 	 * Pin the configfs filesystem.  This means we can safely access
 	 * the root of the configfs filesystem.
 	 */
-	ret = configfs_pin_fs();
-	if (ret)
-		return ret;
+	root = configfs_pin_fs();
+	if (IS_ERR(root))
+		return PTR_ERR(root);
 
 	/*
 	 * Next, lock the root directory.  We're going to check that the
 	 * subsystem is really registered, and so we need to lock out
 	 * configfs_[un]register_subsystem().
 	 */
-	mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);
+	mutex_lock(&root->d_inode->i_mutex);
 
-	root_sd = configfs_sb->s_root->d_fsdata;
+	root_sd = root->d_fsdata;
 
 	list_for_each_entry(p, &root_sd->s_children, s_sibling) {
 		if (p->s_type & CONFIGFS_DIR) {
···
 out_unlock_dirent_lock:
 	spin_unlock(&configfs_dirent_lock);
 out_unlock_fs:
-	mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
+	mutex_unlock(&root->d_inode->i_mutex);
 
 	/*
 	 * If we succeeded, the fs is pinned via other methods.  If not,
···
 	struct config_item_type *type;
 	struct module *subsys_owner = NULL, *new_item_owner = NULL;
 	char *name;
-
-	if (dentry->d_parent == configfs_sb->s_root) {
-		ret = -EPERM;
-		goto out;
-	}
 
 	sd = dentry->d_parent->d_fsdata;
 
···
 	struct module *subsys_owner = NULL, *dead_item_owner = NULL;
 	int ret;
 
-	if (dentry->d_parent == configfs_sb->s_root)
-		return -EPERM;
-
 	sd = dentry->d_fsdata;
 	if (sd->s_type & CONFIGFS_USET_DEFAULT)
 		return -EPERM;
···
 	.setattr	= configfs_setattr,
 };
 
+const struct inode_operations configfs_root_inode_operations = {
+	.lookup		= configfs_lookup,
+	.setattr	= configfs_setattr,
+};
+
 #if 0
 int configfs_rename_dir(struct config_item * item, const char *new_name)
 {
···
 static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
 {
 	struct dentry *dentry = filp->f_path.dentry;
+	struct super_block *sb = dentry->d_sb;
 	struct configfs_dirent * parent_sd = dentry->d_fsdata;
 	struct configfs_dirent *cursor = filp->private_data;
 	struct list_head *p, *q = &cursor->s_sibling;
···
 					ino = inode->i_ino;
 				spin_unlock(&configfs_dirent_lock);
 				if (!inode)
-					ino = iunique(configfs_sb, 2);
+					ino = iunique(sb, 2);
 
 				if (filldir(dirent, name, len, filp->f_pos, ino,
 						 dt_type(next)) < 0)
···
 	struct config_group *group = &subsys->su_group;
 	struct qstr name;
 	struct dentry *dentry;
+	struct dentry *root;
 	struct configfs_dirent *sd;
 
-	err = configfs_pin_fs();
-	if (err)
-		return err;
+	root = configfs_pin_fs();
+	if (IS_ERR(root))
+		return PTR_ERR(root);
 
 	if (!group->cg_item.ci_name)
 		group->cg_item.ci_name = group->cg_item.ci_namebuf;
 
-	sd = configfs_sb->s_root->d_fsdata;
+	sd = root->d_fsdata;
 	link_group(to_config_group(sd->s_element), group);
 
-	mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex,
-			I_MUTEX_PARENT);
+	mutex_lock_nested(&root->d_inode->i_mutex, I_MUTEX_PARENT);
 
 	name.name = group->cg_item.ci_name;
 	name.len = strlen(name.name);
 	name.hash = full_name_hash(name.name, name.len);
 
 	err = -ENOMEM;
-	dentry = d_alloc(configfs_sb->s_root, &name);
+	dentry = d_alloc(root, &name);
 	if (dentry) {
 		d_add(dentry, NULL);
 
···
 		}
 	}
 
-	mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
+	mutex_unlock(&root->d_inode->i_mutex);
 
 	if (err) {
 		unlink_group(group);
···
 {
 	struct config_group *group = &subsys->su_group;
 	struct dentry *dentry = group->cg_item.ci_dentry;
+	struct dentry *root = dentry->d_sb->s_root;
 
-	if (dentry->d_parent != configfs_sb->s_root) {
+	if (dentry->d_parent != root) {
 		printk(KERN_ERR "configfs: Tried to unregister non-subsystem!\n");
 		return;
 	}
 
-	mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex,
+	mutex_lock_nested(&root->d_inode->i_mutex,
 			  I_MUTEX_PARENT);
 	mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
 	mutex_lock(&configfs_symlink_mutex);
···
 
 	d_delete(dentry);
 
-	mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
+	mutex_unlock(&root->d_inode->i_mutex);
 
 	dput(dentry);
 

fs/configfs/inode.c

···
 static struct lock_class_key default_group_class[MAX_LOCK_DEPTH];
 #endif
 
-extern struct super_block * configfs_sb;
-
 static const struct address_space_operations configfs_aops = {
 	.readpage	= simple_readpage,
 	.write_begin	= simple_write_begin,
···
 	inode->i_ctime = iattr->ia_ctime;
 }
 
-struct inode *configfs_new_inode(umode_t mode, struct configfs_dirent * sd)
+struct inode *configfs_new_inode(umode_t mode, struct configfs_dirent *sd,
+				 struct super_block *s)
 {
-	struct inode * inode = new_inode(configfs_sb);
+	struct inode * inode = new_inode(s);
 	if (inode) {
 		inode->i_ino = get_next_ino();
 		inode->i_mapping->a_ops = &configfs_aops;
···
 int configfs_create(struct dentry * dentry, umode_t mode, int (*init)(struct inode *))
 {
 	int error = 0;
-	struct inode * inode = NULL;
-	if (dentry) {
-		if (!dentry->d_inode) {
-			struct configfs_dirent *sd = dentry->d_fsdata;
-			if ((inode = configfs_new_inode(mode, sd))) {
-				if (dentry->d_parent && dentry->d_parent->d_inode) {
-					struct inode *p_inode = dentry->d_parent->d_inode;
-					p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME;
-				}
-				configfs_set_inode_lock_class(sd, inode);
-				goto Proceed;
-			}
-			else
-				error = -ENOMEM;
-		} else
-			error = -EEXIST;
-	} else
-		error = -ENOENT;
-	goto Done;
+	struct inode *inode = NULL;
+	struct configfs_dirent *sd;
+	struct inode *p_inode;
 
- Proceed:
-	if (init)
+	if (!dentry)
+		return -ENOENT;
+
+	if (dentry->d_inode)
+		return -EEXIST;
+
+	sd = dentry->d_fsdata;
+	inode = configfs_new_inode(mode, sd, dentry->d_sb);
+	if (!inode)
+		return -ENOMEM;
+
+	p_inode = dentry->d_parent->d_inode;
+	p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME;
+	configfs_set_inode_lock_class(sd, inode);
+
+	if (init) {
 		error = init(inode);
-	if (!error) {
-		d_instantiate(dentry, inode);
-		if (S_ISDIR(mode) || S_ISLNK(mode))
-			dget(dentry);  /* pin link and directory dentries in core */
-	} else
-		iput(inode);
- Done:
+		if (error) {
+			iput(inode);
+			return error;
+		}
+	}
+	d_instantiate(dentry, inode);
+	if (S_ISDIR(mode) || S_ISLNK(mode))
+		dget(dentry);  /* pin link and directory dentries in core */
 	return error;
 }
 

fs/configfs/mount.c

···
 /* Random magic number */
 #define CONFIGFS_MAGIC 0x62656570
 
-struct vfsmount * configfs_mount = NULL;
-struct super_block * configfs_sb = NULL;
+static struct vfsmount *configfs_mount = NULL;
 struct kmem_cache *configfs_dir_cachep;
 static int configfs_mnt_count = 0;
 
···
 	sb->s_magic = CONFIGFS_MAGIC;
 	sb->s_op = &configfs_ops;
 	sb->s_time_gran = 1;
-	configfs_sb = sb;
 
 	inode = configfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
-				   &configfs_root);
+				   &configfs_root, sb);
 	if (inode) {
-		inode->i_op = &configfs_dir_inode_operations;
+		inode->i_op = &configfs_root_inode_operations;
 		inode->i_fop = &configfs_dir_operations;
 		/* directory inodes start off with i_nlink == 2 (for "." entry) */
 		inc_nlink(inode);
···
 		return -ENOMEM;
 	}
 
-	root = d_alloc_root(inode);
+	root = d_make_root(inode);
 	if (!root) {
 		pr_debug("%s: could not get root dentry!\n",__func__);
-		iput(inode);
 		return -ENOMEM;
 	}
 	config_group_init(&configfs_root_group);
···
 	.kill_sb	= kill_litter_super,
 };
 
-int configfs_pin_fs(void)
+struct dentry *configfs_pin_fs(void)
 {
-	return simple_pin_fs(&configfs_fs_type, &configfs_mount,
+	int err = simple_pin_fs(&configfs_fs_type, &configfs_mount,
 			     &configfs_mnt_count);
+	return err ? ERR_PTR(err) : configfs_mount->mnt_root;
 }
 
 void configfs_release_fs(void)

fs/configfs/symlink.c

···
 
 
 static int get_target(const char *symname, struct path *path,
-		      struct config_item **target)
+		      struct config_item **target, struct super_block *sb)
 {
 	int ret;
 
 	ret = kern_path(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, path);
 	if (!ret) {
-		if (path->dentry->d_sb == configfs_sb) {
+		if (path->dentry->d_sb == sb) {
 			*target = configfs_get_config_item(path->dentry);
 			if (!*target) {
 				ret = -ENOENT;
···
 	struct config_item *target_item = NULL;
 	struct config_item_type *type;
 
-	ret = -EPERM;  /* What lack-of-symlink returns */
-	if (dentry->d_parent == configfs_sb->s_root)
-		goto out;
-
 	sd = dentry->d_parent->d_fsdata;
 	/*
 	 * Fake invisibility if dir belongs to a group/default groups hierarchy
···
 	    !type->ct_item_ops->allow_link)
 		goto out_put;
 
-	ret = get_target(symname, &path, &target_item);
+	ret = get_target(symname, &path, &target_item, dentry->d_sb);
 	if (ret)
 		goto out_put;
 
···
 	ret = -EPERM;  /* What lack-of-symlink returns */
 	if (!(sd->s_type & CONFIGFS_ITEM_LINK))
 		goto out;
-
-	BUG_ON(dentry->d_parent == configfs_sb->s_root);
 
 	sl = sd->s_element;
 

fs/cramfs/inode.c

···
 	root = get_cramfs_inode(sb, &super.root, 0);
 	if (IS_ERR(root))
 		goto out;
-	sb->s_root = d_alloc_root(root);
-	if (!sb->s_root) {
-		iput(root);
+	sb->s_root = d_make_root(root);
+	if (!sb->s_root)
 		goto out;
-	}
 	return 0;
 out:
 	kfree(sbi);

fs/dcache.c

···
 
 EXPORT_SYMBOL(d_instantiate_unique);
 
-/**
- * d_alloc_root - allocate root dentry
- * @root_inode: inode to allocate the root for
- *
- * Allocate a root ("/") dentry for the inode given. The inode is
- * instantiated and returned. %NULL is returned if there is insufficient
- * memory or the inode passed is %NULL.
- */
- 
-struct dentry * d_alloc_root(struct inode * root_inode)
-{
-	struct dentry *res = NULL;
-
-	if (root_inode) {
-		static const struct qstr name = { .name = "/", .len = 1 };
-
-		res = __d_alloc(root_inode->i_sb, &name);
-		if (res)
-			d_instantiate(res, root_inode);
-	}
-	return res;
-}
-EXPORT_SYMBOL(d_alloc_root);
-
 struct dentry *d_make_root(struct inode *root_inode)
 {
 	struct dentry *res = NULL;

fs/debugfs/file.c

···
  * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
  * code.
  */
-struct dentry *debugfs_create_regset32(const char *name, mode_t mode,
+struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
 				       struct dentry *parent,
 				       struct debugfs_regset32 *regset)
 {

fs/devpts/inode.c

···
 	inode->i_fop = &simple_dir_operations;
 	set_nlink(inode, 2);
 
-	s->s_root = d_alloc_root(inode);
+	s->s_root = d_make_root(inode);
 	if (s->s_root)
 		return 0;
 
 	printk(KERN_ERR "devpts: get root dentry failed\n");
-	iput(inode);
 
 fail:
 	return -ENOMEM;

fs/ecryptfs/file.c

···
 				unsigned long nr_segs, loff_t pos)
 {
 	ssize_t rc;
-	struct dentry *lower_dentry;
-	struct vfsmount *lower_vfsmount;
+	struct path lower;
 	struct file *file = iocb->ki_filp;
 
 	rc = generic_file_aio_read(iocb, iov, nr_segs, pos);
···
 	if (-EIOCBQUEUED == rc)
 		rc = wait_on_sync_kiocb(iocb);
 	if (rc >= 0) {
-		lower_dentry = ecryptfs_dentry_to_lower(file->f_path.dentry);
-		lower_vfsmount = ecryptfs_dentry_to_lower_mnt(file->f_path.dentry);
-		touch_atime(lower_vfsmount, lower_dentry);
+		lower.dentry = ecryptfs_dentry_to_lower(file->f_path.dentry);
+		lower.mnt = ecryptfs_dentry_to_lower_mnt(file->f_path.dentry);
+		touch_atime(&lower);
 	}
 	return rc;
 }

fs/ecryptfs/main.c

···
 	if (IS_ERR(inode))
 		goto out_free;
 
-	s->s_root = d_alloc_root(inode);
+	s->s_root = d_make_root(inode);
 	if (!s->s_root) {
-		iput(inode);
 		rc = -ENOMEM;
 		goto out_free;
 	}
···
 		       "Failed to allocate one or more kmem_cache objects\n");
 		goto out;
 	}
-	rc = register_filesystem(&ecryptfs_fs_type);
-	if (rc) {
-		printk(KERN_ERR "Failed to register filesystem\n");
-		goto out_free_kmem_caches;
-	}
 	rc = do_sysfs_registration();
 	if (rc) {
 		printk(KERN_ERR "sysfs registration failed\n");
-		goto out_unregister_filesystem;
+		goto out_free_kmem_caches;
 	}
 	rc = ecryptfs_init_kthread();
 	if (rc) {
···
 		       "rc = [%d]\n", rc);
 		goto out_release_messaging;
 	}
+	rc = register_filesystem(&ecryptfs_fs_type);
+	if (rc) {
+		printk(KERN_ERR "Failed to register filesystem\n");
+		goto out_destroy_crypto;
+	}
 	if (ecryptfs_verbosity > 0)
 		printk(KERN_CRIT "eCryptfs verbosity set to %d. Secret values "
 			"will be written to the syslog!\n", ecryptfs_verbosity);
 
 	goto out;
+out_destroy_crypto:
+	ecryptfs_destroy_crypto();
 out_release_messaging:
 	ecryptfs_release_messaging();
 out_destroy_kthread:
 	ecryptfs_destroy_kthread();
 out_do_sysfs_unregistration:
 	do_sysfs_unregistration();
-out_unregister_filesystem:
-	unregister_filesystem(&ecryptfs_fs_type);
 out_free_kmem_caches:
 	ecryptfs_free_kmem_caches();
 out:

fs/ecryptfs/super.c

···
 const struct super_operations ecryptfs_sops = {
 	.alloc_inode = ecryptfs_alloc_inode,
 	.destroy_inode = ecryptfs_destroy_inode,
-	.drop_inode = generic_drop_inode,
 	.statfs = ecryptfs_statfs,
 	.remount_fs = NULL,
 	.evict_inode = ecryptfs_evict_inode,

fs/efs/super.c

···
 		goto out_no_fs;
 	}
 
-	s->s_root = d_alloc_root(root);
+	s->s_root = d_make_root(root);
 	if (!(s->s_root)) {
 		printk(KERN_ERR "EFS: get root dentry failed\n");
-		iput(root);
 		ret = -ENOMEM;
 		goto out_no_fs;
 	}

fs/exec.c

···
 static LIST_HEAD(formats);
 static DEFINE_RWLOCK(binfmt_lock);
 
-int __register_binfmt(struct linux_binfmt * fmt, int insert)
+void __register_binfmt(struct linux_binfmt * fmt, int insert)
 {
-	if (!fmt)
-		return -EINVAL;
+	BUG_ON(!fmt);
 	write_lock(&binfmt_lock);
 	insert ? list_add(&fmt->lh, &formats) :
 		 list_add_tail(&fmt->lh, &formats);
 	write_unlock(&binfmt_lock);
-	return 0;	
 }
 
 EXPORT_SYMBOL(__register_binfmt);
···
 	bprm->mm = NULL;		/* We're using it now */
 
 	set_fs(USER_DS);
-	current->flags &= ~(PF_RANDOMIZE | PF_KTHREAD);
+	current->flags &= ~(PF_RANDOMIZE | PF_FORKNOEXEC | PF_KTHREAD);
 	flush_thread();
 	current->personality &= ~bprm->per_clear;
 

fs/exofs/namei.c

···
 {
 	struct inode *inode = old_dentry->d_inode;
 
-	if (inode->i_nlink >= EXOFS_LINK_MAX)
-		return -EMLINK;
-
 	inode->i_ctime = CURRENT_TIME;
 	inode_inc_link_count(inode);
 	ihold(inode);
···
 static int exofs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
 	struct inode *inode;
-	int err = -EMLINK;
-
-	if (dir->i_nlink >= EXOFS_LINK_MAX)
-		goto out;
+	int err;
 
 	inode_inc_link_count(dir);
 
···
 		if (err)
 			goto out_dir;
 	} else {
-		if (dir_de) {
-			err = -EMLINK;
-			if (new_dir->i_nlink >= EXOFS_LINK_MAX)
-				goto out_dir;
-		}
 		err = exofs_add_link(new_dentry, old_inode);
 		if (err)
 			goto out_dir;

fs/exofs/super.c

···
 	sb->s_blocksize = EXOFS_BLKSIZE;
 	sb->s_blocksize_bits = EXOFS_BLKSHIFT;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
+	sb->s_max_links = EXOFS_LINK_MAX;
 	atomic_set(&sbi->s_curr_pending, 0);
 	sb->s_bdev = NULL;
 	sb->s_dev = 0;
···
 		ret = PTR_ERR(root);
 		goto free_sbi;
 	}
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
-		iput(root);
 		EXOFS_ERR("ERROR: get root inode failed\n");
 		ret = -ENOMEM;
 		goto free_sbi;

fs/ext2/namei.c

···
 	struct inode *inode = old_dentry->d_inode;
 	int err;
 
-	if (inode->i_nlink >= EXT2_LINK_MAX)
-		return -EMLINK;
-
 	dquot_initialize(dir);
 
 	inode->i_ctime = CURRENT_TIME_SEC;
···
 static int ext2_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
 {
 	struct inode * inode;
-	int err = -EMLINK;
-
-	if (dir->i_nlink >= EXT2_LINK_MAX)
-		goto out;
+	int err;
 
 	dquot_initialize(dir);
 
···
 			drop_nlink(new_inode);
 		inode_dec_link_count(new_inode);
 	} else {
-		if (dir_de) {
-			err = -EMLINK;
-			if (new_dir->i_nlink >= EXT2_LINK_MAX)
-				goto out_dir;
-		}
 		err = ext2_add_link(new_dentry, old_inode);
 		if (err)
 			goto out_dir;

fs/ext2/super.c

···
 	}
 
 	sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits);
+	sb->s_max_links = EXT2_LINK_MAX;
 
 	if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV) {
 		sbi->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
···
 		goto failed_mount3;
 	}
 
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
-		iput(root);
 		ext2_msg(sb, KERN_ERR, "error: get root inode failed");
 		ret = -ENOMEM;
 		goto failed_mount3;

fs/ext3/super.c

···
 		ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
 		goto failed_mount3;
 	}
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		ext3_msg(sb, KERN_ERR, "error: get root dentry failed");
-		iput(root);
 		ret = -ENOMEM;
 		goto failed_mount3;
 	}

fs/ext4/super.c

···
 		iput(root);
 		goto failed_mount4;
 	}
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
-		iput(root);
 		ext4_msg(sb, KERN_ERR, "get root dentry failed");
 		ret = -ENOMEM;
 		goto failed_mount4;
···
 {
 	int i, err;
 
+	ext4_li_info = NULL;
+	mutex_init(&ext4_li_mtx);
+
 	ext4_check_flag_values();
 
 	for (i = 0; i < EXT4_WQ_HASH_SZ; i++) {
···
 	if (err)
 		goto out;
 
-	ext4_li_info = NULL;
-	mutex_init(&ext4_li_mtx);
 	return 0;
 out:
 	unregister_as_ext2();

fs/fat/inode.c

···
 	root_inode->i_ino = MSDOS_ROOT_INO;
 	root_inode->i_version = 1;
 	error = fat_read_root(root_inode);
-	if (error < 0)
+	if (error < 0) {
+		iput(root_inode);
 		goto out_fail;
+	}
 	error = -ENOMEM;
 	insert_inode_hash(root_inode);
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
 	if (!sb->s_root) {
 		fat_msg(sb, KERN_ERR, "get root inode failed");
 		goto out_fail;
···
 out_fail:
 	if (fat_inode)
 		iput(fat_inode);
-	if (root_inode)
-		iput(root_inode);
 	unload_nls(sbi->nls_io);
 	unload_nls(sbi->nls_disk);
 	if (sbi->options.iocharset != fat_default_iocharset)

fs/file_table.c

···
  * to write to @file, along with access to write through
  * its vfsmount.
  */
-void drop_file_write_access(struct file *file)
+static void drop_file_write_access(struct file *file)
 {
 	struct vfsmount *mnt = file->f_path.mnt;
 	struct dentry *dentry = file->f_path.dentry;
···
 	mnt_drop_write(mnt);
 	file_release_write(file);
 }
-EXPORT_SYMBOL_GPL(drop_file_write_access);
 
 /* the real guts of fput() - releasing the last reference to file
  */

fs/freevxfs/vxfs_super.c

···
 		ret = PTR_ERR(root);
 		goto out;
 	}
-	sbp->s_root = d_alloc_root(root);
+	sbp->s_root = d_make_root(root);
 	if (!sbp->s_root) {
-		iput(root);
 		printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
 		goto out_free_ilist;
 	}

fs/fs_struct.c

···
 {
 	struct path old_root;
 
+	path_get_longterm(path);
 	spin_lock(&fs->lock);
 	write_seqcount_begin(&fs->seq);
 	old_root = fs->root;
 	fs->root = *path;
-	path_get_longterm(path);
 	write_seqcount_end(&fs->seq);
 	spin_unlock(&fs->lock);
 	if (old_root.dentry)
···
 {
 	struct path old_pwd;
 
+	path_get_longterm(path);
 	spin_lock(&fs->lock);
 	write_seqcount_begin(&fs->seq);
 	old_pwd = fs->pwd;
 	fs->pwd = *path;
-	path_get_longterm(path);
 	write_seqcount_end(&fs->seq);
 	spin_unlock(&fs->lock);
 
 	if (old_pwd.dentry)
 		path_put_longterm(&old_pwd);
+}
+
+static inline int replace_path(struct path *p, const struct path *old, const struct path *new)
+{
+	if (likely(p->dentry != old->dentry || p->mnt != old->mnt))
+		return 0;
+	*p = *new;
+	return 1;
 }
 
 void chroot_fs_refs(struct path *old_root, struct path *new_root)
···
 		task_lock(p);
 		fs = p->fs;
 		if (fs) {
+			int hits = 0;
 			spin_lock(&fs->lock);
 			write_seqcount_begin(&fs->seq);
-			if (fs->root.dentry == old_root->dentry
-			    && fs->root.mnt == old_root->mnt) {
-				path_get_longterm(new_root);
-				fs->root = *new_root;
-				count++;
-			}
-			if (fs->pwd.dentry == old_root->dentry
-			    && fs->pwd.mnt == old_root->mnt) {
-				path_get_longterm(new_root);
-				fs->pwd = *new_root;
-				count++;
-			}
+			hits += replace_path(&fs->root, old_root, new_root);
+			hits += replace_path(&fs->pwd, old_root, new_root);
 			write_seqcount_end(&fs->seq);
+			while (hits--) {
+				count++;
+				path_get_longterm(new_root);
+			}
 			spin_unlock(&fs->lock);
 		}
 		task_unlock(p);
···
 		int kill;
 		task_lock(tsk);
 		spin_lock(&fs->lock);
-		write_seqcount_begin(&fs->seq);
 		tsk->fs = NULL;
 		kill = !--fs->users;
-		write_seqcount_end(&fs->seq);
 		spin_unlock(&fs->lock);
 		task_unlock(tsk);
 		if (kill)

fs/fuse/inode.c

···
 
 	err = -ENOMEM;
 	root = fuse_get_root_inode(sb, d.rootmode);
-	if (!root)
+	root_dentry = d_make_root(root);
+	if (!root_dentry)
 		goto err_put_conn;
-
-	root_dentry = d_alloc_root(root);
-	if (!root_dentry) {
-		iput(root);
-		goto err_put_conn;
-	}
 	/* only now - we want root dentry with NULL ->d_op */
 	sb->s_d_op = &fuse_dentry_operations;
 

fs/gfs2/ops_fstype.c

···
 		fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
 		return PTR_ERR(inode);
 	}
-	dentry = d_alloc_root(inode);
+	dentry = d_make_root(inode);
 	if (!dentry) {
 		fs_err(sdp, "can't alloc %s dentry\n", name);
-		iput(inode);
 		return -ENOMEM;
 	}
 	*dptr = dentry;

fs/hfs/super.c

···
 
 	sb->s_d_op = &hfs_dentry_operations;
 	res = -ENOMEM;
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
 	if (!sb->s_root)
-		goto bail_iput;
+		goto bail_no_root;
 
 	/* everything's okay */
 	return 0;
 
-bail_iput:
-	iput(root_inode);
 bail_no_root:
 	printk(KERN_ERR "hfs: get root inode failed.\n");
 bail:

fs/hfsplus/hfsplus_fs.h

···
 
 
 /*
+ * hfs+-specific ioctl for making the filesystem bootable
+ */
+#define HFSPLUS_IOC_BLESS _IO('h', 0x80)
+
+/*
  * Functions in any *.c used in other files
  */
 

fs/hfsplus/hfsplus_raw.h

···
 	__be32 write_count;
 	__be64 encodings_bmp;
 
-	u8 finder_info[32];
+	u32 finder_info[8];
 
 	struct hfsplus_fork_raw alloc_file;
 	struct hfsplus_fork_raw ext_file;

fs/hfsplus/inode.c

···
 	mutex_init(&hip->extents_lock);
 	hip->extent_state = 0;
 	hip->flags = 0;
+	hip->userflags = 0;
 	set_bit(HFSPLUS_I_RSRC, &hip->flags);
 
 	err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
···
 	atomic_set(&hip->opencnt, 0);
 	hip->extent_state = 0;
 	hip->flags = 0;
+	hip->userflags = 0;
 	memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 	hip->alloc_blocks = 0;

fs/hfsplus/ioctl.c

···
 #include <asm/uaccess.h>
 #include "hfsplus_fs.h"
 
+/*
+ * "Blessing" an HFS+ filesystem writes metadata to the superblock informing
+ * the platform firmware which file to boot from
+ */
+static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags)
+{
+	struct dentry *dentry = file->f_path.dentry;
+	struct inode *inode = dentry->d_inode;
+	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
+	struct hfsplus_vh *vh = sbi->s_vhdr;
+	struct hfsplus_vh *bvh = sbi->s_backup_vhdr;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	mutex_lock(&sbi->vh_mutex);
+
+	/* Directory containing the bootable system */
+	vh->finder_info[0] = bvh->finder_info[0] =
+		cpu_to_be32(parent_ino(dentry));
+
+	/* Bootloader */
+	vh->finder_info[1] = bvh->finder_info[1] = cpu_to_be32(inode->i_ino);
+
+	/* Per spec, the OS X system folder - same as finder_info[0] here */
+	vh->finder_info[5] = bvh->finder_info[5] =
+		cpu_to_be32(parent_ino(dentry));
+
+	mutex_unlock(&sbi->vh_mutex);
+	return 0;
+}
+
 static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
 {
 	struct inode *inode = file->f_path.dentry->d_inode;
···
 		return hfsplus_ioctl_getflags(file, argp);
 	case HFSPLUS_IOC_EXT2_SETFLAGS:
 		return hfsplus_ioctl_setflags(file, argp);
+	case HFSPLUS_IOC_BLESS:
+		return hfsplus_ioctl_bless(file, argp);
 	default:
 		return -ENOTTY;
 	}

fs/hfsplus/super.c

···
 		goto out_put_alloc_file;
 	}
 
+	sb->s_d_op = &hfsplus_dentry_operations;
+	sb->s_root = d_make_root(root);
+	if (!sb->s_root) {
+		err = -ENOMEM;
+		goto out_put_alloc_file;
+	}
+
 	str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
 	str.name = HFSP_HIDDENDIR_NAME;
 	err = hfs_find_init(sbi->cat_tree, &fd);
···
 		}
 	}
 
-	sb->s_d_op = &hfsplus_dentry_operations;
-	sb->s_root = d_alloc_root(root);
-	if (!sb->s_root) {
-		err = -ENOMEM;
-		goto out_put_hidden_dir;
-	}
-
 	unload_nls(sbi->nls);
 	sbi->nls = nls;
 	return 0;
···
 out_put_hidden_dir:
 	iput(sbi->hidden_dir);
 out_put_root:
-	iput(root);
+	dput(sb->s_root);
+	sb->s_root = NULL;
 out_put_alloc_file:
 	iput(sbi->alloc_file);
 out_close_cat_tree:

fs/hostfs/hostfs_kern.c

···
 	}
 
 	err = -ENOMEM;
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
 	if (sb->s_root == NULL)
-		goto out_put;
+		goto out;
 
 	return 0;
 

fs/hpfs/super.c

···
 	hpfs_init_inode(root);
 	hpfs_read_inode(root);
 	unlock_new_inode(root);
-	s->s_root = d_alloc_root(root);
-	if (!s->s_root) {
-		iput(root);
+	s->s_root = d_make_root(root);
+	if (!s->s_root)
 		goto bail0;
-	}
 
 	/*
 	 * find the root directory's . pointer & finish filling in the inode

fs/hppfs/hppfs.c

···
 
 	err = -ENOMEM;
 	root_inode = get_inode(sb, dget(proc_mnt->mnt_root));
-	if (!root_inode)
-		goto out_mntput;
-
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
 	if (!sb->s_root)
-		goto out_iput;
+		goto out_mntput;
 
 	return 0;
 
- out_iput:
-	iput(root_inode);
  out_mntput:
 	mntput(proc_mnt);
  out:

fs/hugetlbfs/inode.c

···
 static int
 hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
 {
-	struct inode * inode;
-	struct dentry * root;
 	int ret;
 	struct hugetlbfs_config config;
 	struct hugetlbfs_sb_info *sbinfo;
···
 	sb->s_magic = HUGETLBFS_MAGIC;
 	sb->s_op = &hugetlbfs_ops;
 	sb->s_time_gran = 1;
-	inode = hugetlbfs_get_root(sb, &config);
-	if (!inode)
+	sb->s_root = d_make_root(hugetlbfs_get_root(sb, &config));
+	if (!sb->s_root)
 		goto out_free;
-
-	root = d_alloc_root(inode);
-	if (!root) {
-		iput(inode);
-		goto out_free;
-	}
-	sb->s_root = root;
 	return 0;
 out_free:
 	kfree(sbinfo);

fs/inode.c

···
  * (C) 1997 Linus Torvalds
  * (C) 1999 Andrea Arcangeli <[e-mail]> (dynamic inode allocation)
  */
+#include <linux/export.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
-#include <linux/dcache.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/writeback.h>
-#include <linux/module.h>
 #include <linux/backing-dev.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
 #include <linux/hash.h>
 #include <linux/swap.h>
 #include <linux/security.h>
-#include <linux/pagemap.h>
 #include <linux/cdev.h>
 #include <linux/bootmem.h>
 #include <linux/fsnotify.h>
 #include <linux/mount.h>
-#include <linux/async.h>
 #include <linux/posix_acl.h>
 #include <linux/prefetch.h>
-#include <linux/ima.h>
-#include <linux/cred.h>
 #include <linux/buffer_head.h> /* for inode_has_buffers */
 #include <linux/ratelimit.h>
 #include "internal.h"
···
 EXPORT_SYMBOL(generic_delete_inode);
 
 /*
- * Normal UNIX filesystem behaviour: delete the
- * inode when the usage count drops to zero, and
- * i_nlink is zero.
- */
-int generic_drop_inode(struct inode *inode)
-{
-	return !inode->i_nlink || inode_unhashed(inode);
-}
-EXPORT_SYMBOL_GPL(generic_drop_inode);
-
-/*
  * Called when we're dropping the last reference
  * to an inode.
  *
···
  *	This function automatically handles read only file systems and media,
  *	as well as the "noatime" flag and inode specific "noatime" markers.
  */
-void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
+void touch_atime(struct path *path)
 {
-	struct inode *inode = dentry->d_inode;
+	struct vfsmount *mnt = path->mnt;
+	struct inode *inode = path->dentry->d_inode;
 	struct timespec now;
 
 	if (inode->i_flags & S_NOATIME)

fs/isofs/inode.c

···
 	s->s_d_op = &isofs_dentry_ops[table];
 
 	/* get the root dentry */
-	s->s_root = d_alloc_root(inode);
+	s->s_root = d_make_root(inode);
 	if (!(s->s_root)) {
-		iput(inode);
 		error = -ENOMEM;
 		goto out_no_inode;
 	}

fs/jffs2/fs.c

···
 	ret = -ENOMEM;
 
 	D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n"));
-	sb->s_root = d_alloc_root(root_i);
+	sb->s_root = d_make_root(root_i);
 	if (!sb->s_root)
-		goto out_root_i;
+		goto out_root;
 
 	sb->s_maxbytes = 0xFFFFFFFF;
 	sb->s_blocksize = PAGE_CACHE_SIZE;
···
 		jffs2_start_garbage_collect_thread(c);
 	return 0;
 
- out_root_i:
-	iput(root_i);
 out_root:
 	jffs2_free_ino_caches(c);
 	jffs2_free_raw_node_refs(c);

fs/jfs/namei.c

···
 
 	dquot_initialize(dip);
 
-	/* link count overflow on parent directory ? */
-	if (dip->i_nlink == JFS_LINK_MAX) {
-		rc = -EMLINK;
-		goto out1;
-	}
-
 	/*
 	 * search parent directory for entry/freespace
 	 * (dtSearch() returns parent directory page pinned)
···
 	jfs_info("jfs_link: %s %s", old_dentry->d_name.name,
 		 dentry->d_name.name);
 
-	if (ip->i_nlink == JFS_LINK_MAX)
-		return -EMLINK;
-
 	dquot_initialize(dir);
 
 	tid = txBegin(ip->i_sb, 0);
···
 				rc = -ENOTEMPTY;
 				goto out3;
 			}
-		} else if ((new_dir != old_dir) &&
-			   (new_dir->i_nlink == JFS_LINK_MAX)) {
-			rc = -EMLINK;
-			goto out3;
 		}
 	} else if (new_ip) {
 		IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL);

fs/jfs/super.c

···
 		return -ENOMEM;
 
 	sb->s_fs_info = sbi;
+	sb->s_max_links = JFS_LINK_MAX;
 	sbi->sb = sb;
 	sbi->uid = sbi->gid = sbi->umask = -1;
 
···
 		ret = PTR_ERR(inode);
 		goto out_no_rw;
 	}
-	sb->s_root = d_alloc_root(inode);
+	sb->s_root = d_make_root(inode);
 	if (!sb->s_root)
 		goto out_no_root;
 
···
 
 out_no_root:
 	jfs_err("jfs_read_super: get root dentry failed");
-	iput(inode);
 
 out_no_rw:
 	rc = jfs_umount(sb);
···
 	jfs_proc_init();
 #endif
 
-	return register_filesystem(&jfs_fs_type);
+	rc = register_filesystem(&jfs_fs_type);
+	if (!rc)
+		return 0;
 
+#ifdef PROC_FS_JFS
+	jfs_proc_clean();
+#endif
+	kthread_stop(jfsSyncThread);
 kill_committask:
 	for (i = 0; i < commit_threads; i++)
 		kthread_stop(jfsCommitThread[i]);

fs/libfs.c

···
 	inode->i_op = &simple_dir_inode_operations;
 	inode->i_fop = &simple_dir_operations;
 	set_nlink(inode, 2);
-	root = d_alloc_root(inode);
-	if (!root) {
-		iput(inode);
+	root = d_make_root(inode);
+	if (!root)
 		return -ENOMEM;
-	}
 	for (i = 0; !files->name || files->name[0]; i++, files++) {
 		if (!files->name)
 			continue;
···
 	spin_lock(&pin_fs_lock);
 	if (unlikely(!*mount)) {
 		spin_unlock(&pin_fs_lock);
-		mnt = vfs_kern_mount(type, 0, type->name, NULL);
+		mnt = vfs_kern_mount(type, MS_KERNMOUNT, type->name, NULL);
 		if (IS_ERR(mnt))
 			return PTR_ERR(mnt);
 		spin_lock(&pin_fs_lock);

fs/logfs/dir.c

···
 {
 	struct inode *inode = old_dentry->d_inode;
 
-	if (inode->i_nlink >= LOGFS_LINK_MAX)
-		return -EMLINK;
-
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 	ihold(inode);
 	inc_nlink(inode);

fs/logfs/super.c

···
 	if (IS_ERR(rootdir))
 		goto fail;
 
-	sb->s_root = d_alloc_root(rootdir);
-	if (!sb->s_root) {
-		iput(rootdir);
+	sb->s_root = d_make_root(rootdir);
+	if (!sb->s_root)
 		goto fail;
-	}
 
 	/* at that point we know that ->put_super() will be called */
 	super->s_erase_page = alloc_pages(GFP_KERNEL, 0);
···
 	 * the filesystem incompatible with 32bit systems.
 	 */
 	sb->s_maxbytes	= (1ull << 43) - 1;
+	sb->s_max_links = LOGFS_LINK_MAX;
 	sb->s_op	= &logfs_super_operations;
 	sb->s_flags	= flags | MS_NOATIME;
 
···
 	if (ret)
 		goto out2;
 
-	return register_filesystem(&logfs_fs_type);
+	ret = register_filesystem(&logfs_fs_type);
+	if (!ret)
+		return 0;
+	logfs_destroy_inode_cache();
 out2:
 	logfs_compr_exit();
 out1:

fs/minix/inode.c

···
 		sbi->s_version = MINIX_V1;
 		sbi->s_dirsize = 16;
 		sbi->s_namelen = 14;
-		sbi->s_link_max = MINIX_LINK_MAX;
+		s->s_max_links = MINIX_LINK_MAX;
 	} else if (s->s_magic == MINIX_SUPER_MAGIC2) {
 		sbi->s_version = MINIX_V1;
 		sbi->s_dirsize = 32;
 		sbi->s_namelen = 30;
-		sbi->s_link_max = MINIX_LINK_MAX;
+		s->s_max_links = MINIX_LINK_MAX;
 	} else if (s->s_magic == MINIX2_SUPER_MAGIC) {
 		sbi->s_version = MINIX_V2;
 		sbi->s_nzones = ms->s_zones;
 		sbi->s_dirsize = 16;
 		sbi->s_namelen = 14;
-		sbi->s_link_max = MINIX2_LINK_MAX;
+		s->s_max_links = MINIX2_LINK_MAX;
 	} else if (s->s_magic == MINIX2_SUPER_MAGIC2) {
 		sbi->s_version = MINIX_V2;
 		sbi->s_nzones = ms->s_zones;
 		sbi->s_dirsize = 32;
 		sbi->s_namelen = 30;
-		sbi->s_link_max = MINIX2_LINK_MAX;
+		s->s_max_links = MINIX2_LINK_MAX;
 	} else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) {
 		m3s = (struct minix3_super_block *) bh->b_data;
 		s->s_magic = m3s->s_magic;
···
 		sbi->s_dirsize = 64;
 		sbi->s_namelen = 60;
 		sbi->s_version = MINIX_V3;
-		sbi->s_link_max = MINIX2_LINK_MAX;
 		sbi->s_mount_state = MINIX_VALID_FS;
 		sb_set_blocksize(s, m3s->s_blocksize);
+		s->s_max_links = MINIX2_LINK_MAX;
 	} else
 		goto out_no_fs;
 
···
 	minix_set_bit(0,sbi->s_imap[0]->b_data);
 	minix_set_bit(0,sbi->s_zmap[0]->b_data);
 
-	/* set up enough so that it can read an inode */
-	s->s_op = &minix_sops;
-	root_inode = minix_iget(s, MINIX_ROOT_INO);
-	if (IS_ERR(root_inode)) {
-		ret = PTR_ERR(root_inode);
-		goto out_no_root;
-	}
-
 	/* Apparently minix can create filesystems that allocate more blocks for
 	 * the bitmaps than needed.  We simply ignore that, but verify it didn't
 	 * create one with not enough blocks and bail out if so.
···
 	if (sbi->s_imap_blocks < block) {
 		printk("MINIX-fs: file system does not have enough "
 				"imap blocks allocated.  Refusing to mount\n");
-		goto out_iput;
+		goto out_no_bitmap;
 	}
 
 	block = minix_blocks_needed(
···
 	if (sbi->s_zmap_blocks < block) {
 		printk("MINIX-fs: file system does not have enough "
 				"zmap blocks allocated.  Refusing to mount.\n");
-		goto out_iput;
+		goto out_no_bitmap;
+	}
+
+	/* set up enough so that it can read an inode */
+	s->s_op = &minix_sops;
+	root_inode = minix_iget(s, MINIX_ROOT_INO);
+	if (IS_ERR(root_inode)) {
+		ret = PTR_ERR(root_inode);
+		goto out_no_root;
 	}
 
 	ret = -ENOMEM;
-	s->s_root = d_alloc_root(root_inode);
+	s->s_root = d_make_root(root_inode);
 	if (!s->s_root)
-		goto out_iput;
+		goto out_no_root;
 
 	if (!(s->s_flags & MS_RDONLY)) {
 		if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
···
 			"running fsck is recommended\n");
 
 	return 0;
-
-out_iput:
-	iput(root_inode);
-	goto out_freemap;
 
 out_no_root:
 	if (!silent)

fs/minix/minix.h

···
 	unsigned long s_max_size;
 	int s_dirsize;
 	int s_namelen;
-	int s_link_max;
 	struct buffer_head ** s_imap;
 	struct buffer_head ** s_zmap;
 	struct buffer_head * s_sbh;

fs/minix/namei.c

···
 {
 	struct inode *inode = old_dentry->d_inode;
 
-	if (inode->i_nlink >= minix_sb(inode->i_sb)->s_link_max)
-		return -EMLINK;
-
 	inode->i_ctime = CURRENT_TIME_SEC;
 	inode_inc_link_count(inode);
 	ihold(inode);
···
 static int minix_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode)
 {
 	struct inode * inode;
-	int err = -EMLINK;
-
-	if (dir->i_nlink >= minix_sb(dir->i_sb)->s_link_max)
-		goto out;
+	int err;
 
 	inode_inc_link_count(dir);
 
···
 static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
 			   struct inode * new_dir, struct dentry *new_dentry)
 {
-	struct minix_sb_info * info = minix_sb(old_dir->i_sb);
 	struct inode * old_inode = old_dentry->d_inode;
 	struct inode * new_inode = new_dentry->d_inode;
 	struct page * dir_page = NULL;
···
 			drop_nlink(new_inode);
 		inode_dec_link_count(new_inode);
 	} else {
-		if (dir_de) {
-			err = -EMLINK;
-			if (new_dir->i_nlink >= info->s_link_max)
-				goto out_dir;
-		}
 		err = minix_add_link(new_dentry, old_inode);
 		if (err)
 			goto out_dir;

fs/namei.c

···
 	cond_resched();
 	current->total_link_count++;
 
-	touch_atime(link->mnt, dentry);
+	touch_atime(link);
 	nd_set_link(nd, NULL);
 
 	error = security_inode_follow_link(link->dentry, nd);
···
 int vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
 	int error = may_create(dir, dentry);
+	unsigned max_links = dir->i_sb->s_max_links;
 
 	if (error)
 		return error;
···
 	error = security_inode_mkdir(dir, dentry, mode);
 	if (error)
 		return error;
+
+	if (max_links && dir->i_nlink >= max_links)
+		return -EMLINK;
 
 	error = dir->i_op->mkdir(dir, dentry, mode);
 	if (!error)
···
 int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry)
 {
 	struct inode *inode = old_dentry->d_inode;
+	unsigned max_links = dir->i_sb->s_max_links;
 	int error;
 
 	if (!inode)
···
 	/* Make sure we don't allow creating hardlink to an unlinked file */
 	if (inode->i_nlink == 0)
 		error =  -ENOENT;
+	else if (max_links && inode->i_nlink >= max_links)
+		error = -EMLINK;
 	else
 		error = dir->i_op->link(old_dentry, dir, new_dentry);
 	mutex_unlock(&inode->i_mutex);
···
 {
 	int error = 0;
 	struct inode *target = new_dentry->d_inode;
+	unsigned max_links = new_dir->i_sb->s_max_links;
 
 	/*
 	 * If we are going to change the parent - check write permissions,
···
 
 	error = -EBUSY;
 	if (d_mountpoint(old_dentry) || d_mountpoint(new_dentry))
+		goto out;
+
+	error = -EMLINK;
+	if (max_links && !target && new_dir != old_dir &&
+	    new_dir->i_nlink >= max_links)
 		goto out;
 
 	if (target)

fs/ncpfs/inode.c

···
         if (!root_inode)
 		goto out_disconnect;
 	DPRINTK("ncp_fill_super: root vol=%d\n", NCP_FINFO(root_inode)->volNumber);
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
         if (!sb->s_root)
-		goto out_no_root;
+		goto out_disconnect;
 	return 0;
 
-out_no_root:
-	iput(root_inode);
 out_disconnect:
 	ncp_lock_server(server);
 	ncp_disconnect(server);

fs/nfs/getroot.c

···
 {
 	/* The mntroot acts as the dummy root dentry for this superblock */
 	if (sb->s_root == NULL) {
-		sb->s_root = d_alloc_root(inode);
-		if (sb->s_root == NULL) {
-			iput(inode);
+		sb->s_root = d_make_root(inode);
+		if (sb->s_root == NULL)
 			return -ENOMEM;
-		}
 		ihold(inode);
 		/*
 		 * Ensure that this dentry is invisible to d_find_alias().

fs/nfsd/fault_inject.c

···
 {
 	unsigned int i;
 	struct nfsd_fault_inject_op *op;
-	mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
+	umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
 
 	debug_dir = debugfs_create_dir("nfsd", NULL);
 	if (!debug_dir)

fs/nfsd/vfs.c

···
 __be32
 nfsd_readlink(struct svc_rqst *rqstp, struct svc_fh *fhp, char *buf, int *lenp)
 {
-	struct dentry	*dentry;
 	struct inode	*inode;
 	mm_segment_t	oldfs;
 	__be32		err;
 	int		host_err;
+	struct path path;
 
 	err = fh_verify(rqstp, fhp, S_IFLNK, NFSD_MAY_NOP);
 	if (err)
 		goto out;
 
-	dentry = fhp->fh_dentry;
-	inode = dentry->d_inode;
+	path.mnt = fhp->fh_export->ex_path.mnt;
+	path.dentry = fhp->fh_dentry;
+	inode = path.dentry->d_inode;
 
 	err = nfserr_inval;
 	if (!inode->i_op->readlink)
 		goto out;
 
-	touch_atime(fhp->fh_export->ex_path.mnt, dentry);
+	touch_atime(&path);
 	/* N.B. Why does this call need a get_fs()??
 	 * Remove the set_fs and watch the fireworks:-) --okir
 	 */
 
 	oldfs = get_fs(); set_fs(KERNEL_DS);
-	host_err = inode->i_op->readlink(dentry, buf, *lenp);
+	host_err = inode->i_op->readlink(path.dentry, buf, *lenp);
 	set_fs(oldfs);
 
 	if (host_err < 0)

fs/nilfs2/namei.c

···
 	struct nilfs_transaction_info ti;
 	int err;
 
-	if (inode->i_nlink >= NILFS_LINK_MAX)
-		return -EMLINK;
-
 	err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
 	if (err)
 		return err;
···
 	struct inode *inode;
 	struct nilfs_transaction_info ti;
 	int err;
-
-	if (dir->i_nlink >= NILFS_LINK_MAX)
-		return -EMLINK;
 
 	err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
 	if (err)
···
 		drop_nlink(new_inode);
 		nilfs_mark_inode_dirty(new_inode);
 	} else {
-		if (dir_de) {
-			err = -EMLINK;
-			if (new_dir->i_nlink >= NILFS_LINK_MAX)
-				goto out_dir;
-		}
 		err = nilfs_add_link(new_dentry, old_inode);
 		if (err)
 			goto out_dir;

fs/nilfs2/super.c

···
 	if (root->cno == NILFS_CPTREE_CURRENT_CNO) {
 		dentry = d_find_alias(inode);
 		if (!dentry) {
-			dentry = d_alloc_root(inode);
+			dentry = d_make_root(inode);
 			if (!dentry) {
-				iput(inode);
 				ret = -ENOMEM;
 				goto failed_dentry;
 			}
···
 	sb->s_export_op = &nilfs_export_ops;
 	sb->s_root = NULL;
 	sb->s_time_gran = 1;
+	sb->s_max_links = NILFS_LINK_MAX;
 
 	bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
 	sb->s_bdi = bdi ? : &default_backing_dev_info;

fs/ntfs/super.c

···
 		ntfs_error(sb, "Failed to load system files.");
 		goto unl_upcase_iput_tmp_ino_err_out_now;
 	}
-	if ((sb->s_root = d_alloc_root(vol->root_ino))) {
-		/* We grab a reference, simulating an ntfs_iget(). */
-		ihold(vol->root_ino);
+
+	/* We grab a reference, simulating an ntfs_iget(). */
+	ihold(vol->root_ino);
+	if ((sb->s_root = d_make_root(vol->root_ino))) {
 		ntfs_debug("Exiting, status successful.");
 		/* Release the default upcase if it has no users. */
 		mutex_lock(&ntfs_lock);
···
 	}
 	printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n");
 
+	/* Unregister the ntfs sysctls. */
+	ntfs_sysctl(0);
 sysctl_err_out:
 	kmem_cache_destroy(ntfs_big_inode_cache);
 big_inode_err_out:

fs/ocfs2/dlmfs/dlmfs.c

···
 			    void * data,
 			    int silent)
 {
-	struct inode * inode;
-	struct dentry * root;
-
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 	sb->s_blocksize = PAGE_CACHE_SIZE;
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
 	sb->s_magic = DLMFS_MAGIC;
 	sb->s_op = &dlmfs_ops;
-	inode = dlmfs_get_root_inode(sb);
-	if (!inode)
+	sb->s_root = d_make_root(dlmfs_get_root_inode(sb));
+	if (!sb->s_root)
 		return -ENOMEM;
-
-	root = d_alloc_root(inode);
-	if (!root) {
-		iput(inode);
-		return -ENOMEM;
-	}
-	sb->s_root = root;
 	return 0;
 }
 

fs/ocfs2/super.c

···
 	}
 
 	status = ocfs2_mount_volume(sb);
-	if (osb->root_inode)
-		inode = igrab(osb->root_inode);
-
 	if (status < 0)
 		goto read_super_error;
+
+	if (osb->root_inode)
+		inode = igrab(osb->root_inode);
 
 	if (!inode) {
 		status = -EIO;
···
 		goto read_super_error;
 	}
 
-	root = d_alloc_root(inode);
+	root = d_make_root(inode);
 	if (!root) {
 		status = -ENOMEM;
 		mlog_errno(status);
···
 
 read_super_error:
 	brelse(bh);
-
-	if (inode)
-		iput(inode);
 
 	if (osb) {
 		atomic_set(&osb->vol_state, VOLUME_DISABLED);
···
 		init_waitqueue_head(&ocfs2__ioend_wq[i]);
 
 	status = init_ocfs2_uptodate_cache();
-	if (status < 0) {
-		mlog_errno(status);
-		goto leave;
-	}
+	if (status < 0)
+		goto out1;
 
 	status = ocfs2_initialize_mem_caches();
-	if (status < 0) {
-		mlog_errno(status);
-		goto leave;
-	}
+	if (status < 0)
+		goto out2;
 
 	ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
 	if (!ocfs2_wq) {
 		status = -ENOMEM;
-		goto leave;
+		goto out3;
 	}
 
 	ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
···
 	ocfs2_set_locking_protocol();
 
 	status = register_quota_format(&ocfs2_quota_format);
-leave:
-	if (status < 0) {
-		ocfs2_free_mem_caches();
-		exit_ocfs2_uptodate_cache();
-		mlog_errno(status);
-	}
+	if (status < 0)
+		goto out4;
+	status = register_filesystem(&ocfs2_fs_type);
+	if (!status)
+		return 0;
 
-	if (status >= 0) {
-		return register_filesystem(&ocfs2_fs_type);
-	} else
-		return -1;
+	unregister_quota_format(&ocfs2_quota_format);
+out4:
+	destroy_workqueue(ocfs2_wq);
+	debugfs_remove(ocfs2_debugfs_root);
+out3:
+	ocfs2_free_mem_caches();
+out2:
+	exit_ocfs2_uptodate_cache();
+out1:
+	mlog_errno(status);
+	return status;
 }
 
 static void __exit ocfs2_exit(void)

fs/omfs/inode.c

···
 		goto out_brelse_bh2;
 	}
 
-	sb->s_root = d_alloc_root(root);
-	if (!sb->s_root) {
-		iput(root);
+	sb->s_root = d_make_root(root);
+	if (!sb->s_root)
 		goto out_brelse_bh2;
-	}
 	printk(KERN_DEBUG "omfs: Mounted volume %s\n", omfs_rb->r_name);
 
 	ret = 0;

fs/openpromfs/inode.c

···
 	oi->type = op_inode_node;
 	oi->u.node = of_find_node_by_path("/");
 
-	s->s_root = d_alloc_root(root_inode);
+	s->s_root = d_make_root(root_inode);
 	if (!s->s_root)
 		goto out_no_root_dentry;
 	return 0;
 
 out_no_root_dentry:
-	iput(root_inode);
 	ret = -ENOMEM;
 out_no_root:
 	printk("openprom_fill_super: get root inode failed\n");

fs/proc/inode.c

···
 
 int proc_fill_super(struct super_block *s)
 {
-	struct inode * root_inode;
-
 	s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
 	s->s_blocksize = 1024;
 	s->s_blocksize_bits = 10;
···
 	s->s_time_gran = 1;
 	
 	pde_get(&proc_root);
-	root_inode = proc_get_inode(s, &proc_root);
-	if (!root_inode)
-		goto out_no_root;
-	root_inode->i_uid = 0;
-	root_inode->i_gid = 0;
-	s->s_root = d_alloc_root(root_inode);
-	if (!s->s_root)
-		goto out_no_root;
-	return 0;
+	s->s_root = d_make_root(proc_get_inode(s, &proc_root));
+	if (s->s_root)
+		return 0;
 
-out_no_root:
 	printk("proc_read_super: get root inode failed\n");
-	iput(root_inode);
 	pde_put(&proc_root);
 	return -ENOMEM;
 }

fs/pstore/inode.c

···
 
 int pstore_fill_super(struct super_block *sb, void *data, int silent)
 {
-	struct inode *inode = NULL;
-	struct dentry *root;
-	int err;
+	struct inode *inode;
 
 	save_mount_options(sb, data);
 
···
 	parse_options(data);
 
 	inode = pstore_get_inode(sb, NULL, S_IFDIR | 0755, 0);
-	if (!inode) {
-		err = -ENOMEM;
-		goto fail;
+	if (inode) {
+		/* override ramfs "dir" options so we catch unlink(2) */
+		inode->i_op = &pstore_dir_inode_operations;
 	}
-	/* override ramfs "dir" options so we catch unlink(2) */
-	inode->i_op = &pstore_dir_inode_operations;
-
-	root = d_alloc_root(inode);
-	sb->s_root = root;
-	if (!root) {
-		err = -ENOMEM;
-		goto fail;
-	}
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root)
+		return -ENOMEM;
 
 	pstore_get_records(0);
 
 	return 0;
-fail:
-	iput(inode);
-	return err;
 }
 
 static struct dentry *pstore_mount(struct file_system_type *fs_type,

fs/qnx4/inode.c

···
 	return 0;
 }
 
-static struct buffer_head *qnx4_getblk(struct inode *inode, int nr,
-				       int create)
-{
-	struct buffer_head *result = NULL;
-
-	if ( nr >= 0 )
-		nr = qnx4_block_map( inode, nr );
-	if (nr) {
-		result = sb_getblk(inode->i_sb, nr);
-		return result;
-	}
-	return NULL;
-}
-
-struct buffer_head *qnx4_bread(struct inode *inode, int block, int create)
-{
-	struct buffer_head *bh;
-
-	bh = qnx4_getblk(inode, block, create);
-	if (!bh || buffer_uptodate(bh)) {
-		return bh;
-	}
-	ll_rw_block(READ, 1, &bh);
-	wait_on_buffer(bh);
-	if (buffer_uptodate(bh)) {
-		return bh;
-	}
-	brelse(bh);
-
-	return NULL;
-}
-
 static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create )
 {
 	unsigned long phys;
···
 	return 0;
 }
 
+static inline u32 try_extent(qnx4_xtnt_t *extent, u32 *offset)
+{
+	u32 size = le32_to_cpu(extent->xtnt_size);
+	if (*offset < size)
+		return le32_to_cpu(extent->xtnt_blk) + *offset - 1;
+	*offset -= size;
+	return 0;
+}
+
 unsigned long qnx4_block_map( struct inode *inode, long iblock )
 {
 	int ix;
-	long offset, i_xblk;
-	unsigned long block = 0;
+	long i_xblk;
 	struct buffer_head *bh = NULL;
 	struct qnx4_xblk *xblk = NULL;
 	struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode);
 	u16 nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts);
+	u32 offset = iblock;
+	u32 block = try_extent(&qnx4_inode->di_first_xtnt, &offset);
 
-	if ( iblock < le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size) ) {
+	if (block) {
 		// iblock is in the first extent. This is easy.
-		block = le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_blk) + iblock - 1;
 	} else {
 		// iblock is beyond first extent. We have to follow the extent chain.
 		i_xblk = le32_to_cpu(qnx4_inode->di_xblk);
-		offset = iblock - le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size);
 		ix = 0;
 		while ( --nxtnt > 0 ) {
 			if ( ix == 0 ) {
···
 					return -EIO;
 				}
 			}
-			if ( offset < le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size) ) {
+			block = try_extent(&xblk->xblk_xtnts[ix], &offset);
+			if (block) {
 				// got it!
-				block = le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_blk) + offset - 1;
 				break;
 			}
-			offset -= le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size);
 			if ( ++ix >= xblk->xblk_num_xtnts ) {
 				i_xblk = le32_to_cpu(xblk->xblk_next_xblk);
 				ix = 0;
···
  	}
 
 	ret = -ENOMEM;
- 	s->s_root = d_alloc_root(root);
+ 	s->s_root = d_make_root(root);
  	if (s->s_root == NULL)
- 		goto outi;
+ 		goto outb;
 
 	brelse(bh);
 	return 0;
 
-      outi:
-	iput(root);
       outb:
 	kfree(qs->BitMap);
       out:
···
 	return;
 }
 
-static int qnx4_writepage(struct page *page, struct writeback_control *wbc)
-{
-	return block_write_full_page(page,qnx4_get_block, wbc);
-}
-
 static int qnx4_readpage(struct file *file, struct page *page)
 {
 	return block_read_full_page(page,qnx4_get_block);
 }
 
-static int qnx4_write_begin(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned flags,
-			struct page **pagep, void **fsdata)
-{
-	struct qnx4_inode_info *qnx4_inode = qnx4_i(mapping->host);
-	int ret;
-
-	*pagep = NULL;
-	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
-				qnx4_get_block,
-				&qnx4_inode->mmu_private);
-	if (unlikely(ret)) {
-		loff_t isize = mapping->host->i_size;
-		if (pos + len > isize)
-			vmtruncate(mapping->host, isize);
-	}
-
-	return ret;
-}
 static sector_t qnx4_bmap(struct address_space *mapping, sector_t block)
 {
 	return generic_block_bmap(mapping,block,qnx4_get_block);
 }
 static const struct address_space_operations qnx4_aops = {
 	.readpage	= qnx4_readpage,
-	.writepage	= qnx4_writepage,
-	.write_begin	= qnx4_write_begin,
-	.write_end	= generic_write_end,
 	.bmap		= qnx4_bmap
 };
 

fs/qnx4/namei.c

···
 	} else {
 		namelen = QNX4_SHORT_NAME_MAX;
 	}
-	/* "" means "." ---> so paths like "/usr/lib//libc.a" work */
-	if (!len && (de->di_fname[0] == '.') && (de->di_fname[1] == '\0')) {
-		return 1;
-	}
 	thislen = strlen( de->di_fname );
 	if ( thislen > namelen )
 		thislen = namelen;
···
 	block = offset = blkofs = 0;
 	while (blkofs * QNX4_BLOCK_SIZE + offset < dir->i_size) {
 		if (!bh) {
-			bh = qnx4_bread(dir, blkofs, 0);
+			block = qnx4_block_map(dir, blkofs);
+			if (block)
+				bh = sb_bread(dir->i_sb, block);
 			if (!bh) {
 				blkofs++;
 				continue;
···
 		}
 		*res_dir = (struct qnx4_inode_entry *) (bh->b_data + offset);
 		if (qnx4_match(len, name, bh, &offset)) {
-			block = qnx4_block_map( dir, blkofs );
 			*ino = block * QNX4_INODES_PER_BLOCK +
 			    (offset / QNX4_DIR_ENTRY_SIZE) - 1;
 			return bh;

fs/qnx4/qnx4.h

···
 extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
 extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
 
-extern struct buffer_head *qnx4_bread(struct inode *, int, int);
-
 extern const struct inode_operations qnx4_dir_inode_operations;
 extern const struct file_operations qnx4_dir_operations;
 extern int qnx4_is_free(struct super_block *sb, long block);

fs/qnx6/Kconfig

···
+config QNX6FS_FS
+	tristate "QNX6 file system support (read only)"
+	depends on BLOCK && CRC32
+	help
+	  This is the file system used by the real-time operating systems
+	  QNX 6 (also called QNX RTP).
+	  Further information is available at <http://www.qnx.com/>.
+	  Say Y if you intend to mount QNX hard disks or floppies formatted
+          with a mkqnx6fs.
+	  However, keep in mind that this currently is a readonly driver!
+
+	  To compile this file system support as a module, choose M here: the
+	  module will be called qnx6.
+
+	  If you don't know whether you need it, then you don't need it:
+	  answer N.
+
+config QNX6FS_DEBUG
+	bool "QNX6 debugging information"
+	depends on QNX6FS_FS
+	help
+	  Turns on extended debugging output.
+
+	  If you are not a developer working on the QNX6FS, you probably don't
+	  want this:
+	  answer N.

fs/qnx6/Makefile

···
+#
+# Makefile for the linux qnx4-filesystem routines.
+#
+
+obj-$(CONFIG_QNX6FS_FS) += qnx6.o
+
+qnx6-objs := inode.o dir.o namei.o super_mmi.o

fs/qnx6/README

···
+
+  This is a snapshot of the QNX6 filesystem for Linux.
+  Please send diffs and remarks to <[e-mail]> .
+
+Credits :
+
+Al Viro		<[e-mail]> (endless patience with me & support ;))
+Kai Bankett	<[e-mail]> (Maintainer)

fs/qnx6/dir.c

···
+/*
+ * QNX6 file system, Linux implementation.
+ *
+ * Version : 1.0.0
+ *
+ * History :
+ *
+ * 01-02-2012 by Kai Bankett ([e-mail]) : first release.
+ * 16-02-2012 pagemap extension by Al Viro
+ *
+ */
+
+#include "qnx6.h"
+
+static unsigned qnx6_lfile_checksum(char *name, unsigned size)
+{
+	unsigned crc = 0;
+	char *end = name + size;
+	while (name < end) {
+		crc = ((crc >> 1) + *(name++)) ^
+			((crc & 0x00000001) ? 0x80000000 : 0);
+	}
+	return crc;
+}
+
+static struct page *qnx6_get_page(struct inode *dir, unsigned long n)
+{
+	struct address_space *mapping = dir->i_mapping;
+	struct page *page = read_mapping_page(mapping, n, NULL);
+	if (!IS_ERR(page))
+		kmap(page);
+	return page;
+}
+
+static inline unsigned long dir_pages(struct inode *inode)
+{
+	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
+}
+
+static unsigned last_entry(struct inode *inode, unsigned long page_nr)
+{
+	unsigned long last_byte = inode->i_size;
+	last_byte -= page_nr << PAGE_CACHE_SHIFT;
+	if (last_byte > PAGE_CACHE_SIZE)
+		last_byte = PAGE_CACHE_SIZE;
+	return last_byte / QNX6_DIR_ENTRY_SIZE;
+}
+
+static struct qnx6_long_filename *qnx6_longname(struct super_block *sb,
+					 struct qnx6_long_dir_entry *de,
+					 struct page **p)
+{
+	struct qnx6_sb_info *sbi = QNX6_SB(sb);
+	u32 s = fs32_to_cpu(sbi, de->de_long_inode); /* in block units */
+	u32 n = s >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits); /* in pages */
+	/* within page */
+	u32 offs = (s << sb->s_blocksize_bits) & ~PAGE_CACHE_MASK;
+	struct address_space *mapping = sbi->longfile->i_mapping;
+	struct page *page = read_mapping_page(mapping, n, NULL);
+	if (IS_ERR(page))
+		return ERR_CAST(page);
+	kmap(*p = page);
+	return (struct qnx6_long_filename *)(page_address(page) + offs);
+}
+
+static int qnx6_dir_longfilename(struct inode *inode,
+			struct qnx6_long_dir_entry *de,
+			void *dirent, loff_t pos,
+			unsigned de_inode, filldir_t filldir)
+{
+	struct qnx6_long_filename *lf;
+	struct super_block *s = inode->i_sb;
+	struct qnx6_sb_info *sbi = QNX6_SB(s);
+	struct page *page;
+	int lf_size;
+
+	if (de->de_size != 0xff) {
+		/* error - long filename entries always have size 0xff
+		   in direntry */
+		printk(KERN_ERR "qnx6: invalid direntry size (%i).\n",
+				de->de_size);
+		return 0;
+	}
+	lf = qnx6_longname(s, de, &page);
+	if (IS_ERR(lf)) {
+		printk(KERN_ERR "qnx6:Error reading longname\n");
+		return 0;
+	}
+
+	lf_size = fs16_to_cpu(sbi, lf->lf_size);
+
+	if (lf_size > QNX6_LONG_NAME_MAX) {
+		QNX6DEBUG((KERN_INFO "file %s\n", lf->lf_fname));
+		printk(KERN_ERR "qnx6:Filename too long (%i)\n", lf_size);
+		qnx6_put_page(page);
+		return 0;
+	}
+
+	/* calc & validate longfilename checksum
+	   mmi 3g filesystem does not have that checksum */
+	if (!test_opt(s, MMI_FS) && fs32_to_cpu(sbi, de->de_checksum) !=
+			qnx6_lfile_checksum(lf->lf_fname, lf_size))
+		printk(KERN_INFO "qnx6: long filename checksum error.\n");
+
+	QNX6DEBUG((KERN_INFO "qnx6_readdir:%.*s inode:%u\n",
+					lf_size, lf->lf_fname, de_inode));
+	if (filldir(dirent, lf->lf_fname, lf_size, pos, de_inode,
+			DT_UNKNOWN) < 0) {
+		qnx6_put_page(page);
+		return 0;
+	}
+
+	qnx6_put_page(page);
+	/* success */
+	return 1;
+}
+
+static int qnx6_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct super_block *s = inode->i_sb;
+	struct qnx6_sb_info *sbi = QNX6_SB(s);
+	loff_t pos = filp->f_pos & (QNX6_DIR_ENTRY_SIZE - 1);
+	unsigned long npages = dir_pages(inode);
+	unsigned long n = pos >> PAGE_CACHE_SHIFT;
+	unsigned start = (pos & ~PAGE_CACHE_MASK) / QNX6_DIR_ENTRY_SIZE;
+	bool done = false;
+
+	if (filp->f_pos >= inode->i_size)
+		return 0;
+
+	for ( ; !done && n < npages; n++, start = 0) {
+		struct page *page = qnx6_get_page(inode, n);
+		int limit = last_entry(inode, n);
+		struct qnx6_dir_entry *de;
+		int i = start;
+
+		if (IS_ERR(page)) {
+			printk(KERN_ERR "qnx6_readdir: read failed\n");
+			filp->f_pos = (n + 1) << PAGE_CACHE_SHIFT;
+			return PTR_ERR(page);
+		}
+		de = ((struct qnx6_dir_entry *)page_address(page)) + start;
+		for (; i < limit; i++, de++, pos += QNX6_DIR_ENTRY_SIZE) {
+			int size = de->de_size;
+			u32 no_inode = fs32_to_cpu(sbi, de->de_inode);
+
+			if (!no_inode || !size)
+				continue;
+
+			if (size > QNX6_SHORT_NAME_MAX) {
+				/* long filename detected
+				   get the filename from long filename
+				   structure / block */
+				if (!qnx6_dir_longfilename(inode,
+					(struct qnx6_long_dir_entry *)de,
+					dirent, pos, no_inode,
+					filldir)) {
+					done = true;
+					break;
+				}
+			} else {
+				QNX6DEBUG((KERN_INFO "qnx6_readdir:%.*s"
+				   " inode:%u\n", size, de->de_fname,
+							no_inode));
+				if (filldir(dirent, de->de_fname, size,
+				      pos, no_inode, DT_UNKNOWN)
+					< 0) {
+					done = true;
+					break;
+				}
+			}
+		}
+		qnx6_put_page(page);
+	}
+	filp->f_pos = pos;
+	return 0;
+}
+
+/*
+ * check if the long filename is correct.
+ */
+static unsigned qnx6_long_match(int len, const char *name,
+			struct qnx6_long_dir_entry *de, struct inode *dir)
+{
+	struct super_block *s = dir->i_sb;
+	struct qnx6_sb_info *sbi = QNX6_SB(s);
+	struct page *page;
+	int thislen;
+	struct qnx6_long_filename *lf = qnx6_longname(s, de, &page);
+
+	if (IS_ERR(lf))
+		return 0;
+
+	thislen = fs16_to_cpu(sbi, lf->lf_size);
+	if (len != thislen) {
+		qnx6_put_page(page);
+		return 0;
+	}
+	if (memcmp(name, lf->lf_fname, len) == 0) {
+		qnx6_put_page(page);
+		return fs32_to_cpu(sbi, de->de_inode);
+	}
+	qnx6_put_page(page);
+	return 0;
+}
+
+/*
+ * check if the filename is correct.
+ */
+static unsigned qnx6_match(struct super_block *s, int len, const char *name,
+			struct qnx6_dir_entry *de)
+{
+	struct qnx6_sb_info *sbi = QNX6_SB(s);
+	if (memcmp(name, de->de_fname, len) == 0)
+		return fs32_to_cpu(sbi, de->de_inode);
+	return 0;
+}
+
+
+unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
+			 struct page **res_page)
+{
+	struct super_block *s = dir->i_sb;
+	struct qnx6_inode_info *ei = QNX6_I(dir);
+	struct page *page = NULL;
+	unsigned long start, n;
+	unsigned long npages = dir_pages(dir);
+	unsigned ino;
+	struct qnx6_dir_entry *de;
+	struct qnx6_long_dir_entry *lde;
+
+	*res_page = NULL;
+
+	if (npages == 0)
+		return 0;
+	start = ei->i_dir_start_lookup;
+	if (start >= npages)
+		start = 0;
+	n = start;
+
+	do {
+		page = qnx6_get_page(dir, n);
+		if (!IS_ERR(page)) {
+			int limit = last_entry(dir, n);
+			int i;
+
+			de = (struct qnx6_dir_entry *)page_address(page);
+			for (i = 0; i < limit; i++, de++) {
+				if (len <= QNX6_SHORT_NAME_MAX) {
+					/* short filename */
+					if (len != de->de_size)
+						continue;
+					ino = qnx6_match(s, len, name, de);
+					if (ino)
+						goto found;
+				} else if (de->de_size == 0xff) {
+					/* deal with long filename */
+					lde = (struct qnx6_long_dir_entry *)de;
+					ino = qnx6_long_match(len,
+								name, lde, dir);
+					if (ino)
+						goto found;
+				} else
+					printk(KERN_ERR "qnx6: undefined "
+						"filename size in inode.\n");
+			}
+			qnx6_put_page(page);
+		}
+
+		if (++n >= npages)
+			n = 0;
+	} while (n != start);
+	return 0;
+
+found:
+	*res_page = page;
+	ei->i_dir_start_lookup = n;
+	return ino;
+}
+
+const struct file_operations qnx6_dir_operations = {
+	.llseek		= generic_file_llseek,
+	.read		= generic_read_dir,
+	.readdir	= qnx6_readdir,
+	.fsync		= generic_file_fsync,
+};
+
+const struct inode_operations qnx6_dir_inode_operations = {
+	.lookup		= qnx6_lookup,
+};

fs/qnx6/inode.c

···
+/*
+ * QNX6 file system, Linux implementation.
+ *
+ * Version : 1.0.0
+ *
+ * History :
+ *
+ * 01-02-2012 by Kai Bankett ([e-mail]) : first release.
+ * 16-02-2012 pagemap extension by Al Viro
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/highuid.h>
+#include <linux/pagemap.h>
+#include <linux/buffer_head.h>
+#include <linux/writeback.h>
+#include <linux/statfs.h>
+#include <linux/parser.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include <linux/crc32.h>
+#include <linux/mpage.h>
+#include "qnx6.h"
+
+static const struct super_operations qnx6_sops;
+
+static void qnx6_put_super(struct super_block *sb);
+static struct inode *qnx6_alloc_inode(struct super_block *sb);
+static void qnx6_destroy_inode(struct inode *inode);
+static int qnx6_remount(struct super_block *sb, int *flags, char *data);
+static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf);
+static int qnx6_show_options(struct seq_file *seq, struct dentry *root);
+
+static const struct super_operations qnx6_sops = {
+	.alloc_inode	= qnx6_alloc_inode,
+	.destroy_inode	= qnx6_destroy_inode,
+	.put_super	= qnx6_put_super,
+	.statfs		= qnx6_statfs,
+	.remount_fs	= qnx6_remount,
+	.show_options	= qnx6_show_options,
+};
+
+static int qnx6_show_options(struct seq_file *seq, struct dentry *root)
+{
+	struct super_block *sb = root->d_sb;
+	struct qnx6_sb_info *sbi = QNX6_SB(sb);
+
+	if (sbi->s_mount_opt & QNX6_MOUNT_MMI_FS)
+		seq_puts(seq, ",mmi_fs");
+	return 0;
+}
+
+static int qnx6_remount(struct super_block *sb, int *flags, char *data)
+{
+	*flags |= MS_RDONLY;
+	return 0;
+}
+
+static unsigned qnx6_get_devblock(struct super_block *sb, __fs32 block)
+{
+	struct qnx6_sb_info *sbi = QNX6_SB(sb);
+	return fs32_to_cpu(sbi, block) + sbi->s_blks_off;
+}
+
+static unsigned qnx6_block_map(struct inode *inode, unsigned iblock);
+
+static int qnx6_get_block(struct inode *inode, sector_t iblock,
+			struct buffer_head *bh, int create)
+{
+	unsigned phys;
+
+	QNX6DEBUG((KERN_INFO "qnx6: qnx6_get_block inode=[%ld] iblock=[%ld]\n",
+			inode->i_ino, (unsigned long)iblock));
+
+	phys = qnx6_block_map(inode, iblock);
+	if (phys) {
+		/* logical block is before EOF */
+		map_bh(bh, inode->i_sb, phys);
+	}
+	return 0;
+}
+
+static int qnx6_check_blockptr(__fs32 ptr)
+{
+	if (ptr == ~(__fs32)0) {
+		printk(KERN_ERR "qnx6: hit unused blockpointer.\n");
+		return 0;
+	}
+	return 1;
+}
+
+static int qnx6_readpage(struct file *file, struct page *page)
+{
+	return mpage_readpage(page, qnx6_get_block);
+}
+
+static int qnx6_readpages(struct file *file, struct address_space *mapping,
+		   struct list_head *pages, unsigned nr_pages)
+{
+	return mpage_readpages(mapping, pages, nr_pages, qnx6_get_block);
+}
+
+/*
+ * returns the block number for the no-th element in the tree
+ * inodebits requred as there are multiple inodes in one inode block
+ */
+static unsigned qnx6_block_map(struct inode *inode, unsigned no)
+{
+	struct super_block *s = inode->i_sb;
+	struct qnx6_sb_info *sbi = QNX6_SB(s);
+	struct qnx6_inode_info *ei = QNX6_I(inode);
+	unsigned block = 0;
+	struct buffer_head *bh;
+	__fs32 ptr;
+	int levelptr;
+	int ptrbits = sbi->s_ptrbits;
+	int bitdelta;
+	u32 mask = (1 << ptrbits) - 1;
+	int depth = ei->di_filelevels;
+	int i;
+
+	bitdelta = ptrbits * depth;
+	levelptr = no >> bitdelta;
+
+	if (levelptr > QNX6_NO_DIRECT_POINTERS - 1) {
+		printk(KERN_ERR "qnx6:Requested file block number (%u) too big.",
+				no);
+		return 0;
+	}
+
+	block = qnx6_get_devblock(s, ei->di_block_ptr[levelptr]);
+
+	for (i = 0; i < depth; i++) {
+		bh = sb_bread(s, block);
+		if (!bh) {
+			printk(KERN_ERR "qnx6:Error reading block (%u)\n",
+					block);
+			return 0;
+		}
+		bitdelta -= ptrbits;
+		levelptr = (no >> bitdelta) & mask;
+		ptr = ((__fs32 *)bh->b_data)[levelptr];
+
+		if (!qnx6_check_blockptr(ptr))
+			return 0;
+
+		block = qnx6_get_devblock(s, ptr);
+		brelse(bh);
+	}
+	return block;
+}
+
+static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	struct super_block *sb = dentry->d_sb;
+	struct qnx6_sb_info *sbi = QNX6_SB(sb);
+	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+
+	buf->f_type    = sb->s_magic;
+	buf->f_bsize   = sb->s_blocksize;
+	buf->f_blocks  = fs32_to_cpu(sbi, sbi->sb->sb_num_blocks);
+	buf->f_bfree   = fs32_to_cpu(sbi, sbi->sb->sb_free_blocks);
+	buf->f_files   = fs32_to_cpu(sbi, sbi->sb->sb_num_inodes);
+	buf->f_ffree   = fs32_to_cpu(sbi, sbi->sb->sb_free_inodes);
+	buf->f_bavail  = buf->f_bfree;
+	buf->f_namelen = QNX6_LONG_NAME_MAX;
+	buf->f_fsid.val[0] = (u32)id;
+	buf->f_fsid.val[1] = (u32)(id >> 32);
+
+	return 0;
+}
+
+/*
+ * Check the root directory of the filesystem to make sure
+ * it really _is_ a qnx6 filesystem, and to check the size
+ * of the directory entry.
+ */
+static const char *qnx6_checkroot(struct super_block *s)
+{
+	static char match_root[2][3] = {".\0\0", "..\0"};
+	int i, error = 0;
+	struct qnx6_dir_entry *dir_entry;
+	struct inode *root = s->s_root->d_inode;
+	struct address_space *mapping = root->i_mapping;
+	struct page *page = read_mapping_page(mapping, 0, NULL);
+	if (IS_ERR(page))
+		return "error reading root directory";
+	kmap(page);
+	dir_entry = page_address(page);
+	for (i = 0; i < 2; i++) {
+		/* maximum 3 bytes - due to match_root limitation */
+		if (strncmp(dir_entry[i].de_fname, match_root[i], 3))
+			error = 1;
+	}
+	qnx6_put_page(page);
+	if (error)
+		return "error reading root directory.";
+	return NULL;
+}
+
+#ifdef CONFIG_QNX6FS_DEBUG
+void qnx6_superblock_debug(struct qnx6_super_block *sb, struct super_block *s)
+{
+	struct qnx6_sb_info *sbi = QNX6_SB(s);
+
+	QNX6DEBUG((KERN_INFO "magic: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_magic)));
+	QNX6DEBUG((KERN_INFO "checksum: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_checksum)));
+	QNX6DEBUG((KERN_INFO "serial: %llx\n",
+				fs64_to_cpu(sbi, sb->sb_serial)));
+	QNX6DEBUG((KERN_INFO "flags: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_flags)));
+	QNX6DEBUG((KERN_INFO "blocksize: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_blocksize)));
+	QNX6DEBUG((KERN_INFO "num_inodes: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_num_inodes)));
+	QNX6DEBUG((KERN_INFO "free_inodes: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_free_inodes)));
+	QNX6DEBUG((KERN_INFO "num_blocks: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_num_blocks)));
+	QNX6DEBUG((KERN_INFO "free_blocks: %08x\n",
+				fs32_to_cpu(sbi, sb->sb_free_blocks)));
+	QNX6DEBUG((KERN_INFO "inode_levels: %02x\n",
+				sb->Inode.levels));
+}
+#endif
+
+enum {
+	Opt_mmifs,
+	Opt_err
+};
+
+static const match_table_t tokens = {
+	{Opt_mmifs, "mmi_fs"},
+	{Opt_err, NULL}
+};
+
+static int qnx6_parse_options(char *options, struct super_block *sb)
+{
+	char *p;
+	struct qnx6_sb_info *sbi = QNX6_SB(sb);
+	substring_t args[MAX_OPT_ARGS];
+
+	if (!options)
+		return 1;
+
+	while ((p = strsep(&options, ",")) != NULL) {
+		int token;
+		if (!*p)
+			continue;
+
+		token = match_token(p, tokens, args);
+		switch (token) {
+		case Opt_mmifs:
+			set_opt(sbi->s_mount_opt, MMI_FS);
+			break;
+		default:
+			return 0;
+		}
+	}
+	return 1;
+}
+
+static struct buffer_head *qnx6_check_first_superblock(struct super_block *s,
+				int offset, int silent)
+{
+	struct qnx6_sb_info *sbi = QNX6_SB(s);
+	struct buffer_head *bh;
+	struct qnx6_super_block *sb;
+
+	/* Check the superblock signatures
+	   start with the first superblock */
+	bh = sb_bread(s, offset);
+	if (!bh) {
+		printk(KERN_ERR "qnx6: unable to read the first superblock\n");
+		return NULL;
+	}
+	sb = (struct qnx6_super_block *)bh->b_data;
+	if (fs32_to_cpu(sbi, sb->sb_magic) != QNX6_SUPER_MAGIC) {
+		sbi->s_bytesex = BYTESEX_BE;
+		if (fs32_to_cpu(sbi, sb->sb_magic) == QNX6_SUPER_MAGIC) {
+			/* we got a big endian fs */
+			QNX6DEBUG((KERN_INFO "qnx6: fs got different"
+					" endianess.\n"));
+			return bh;
+		} else
+			sbi->s_bytesex = BYTESEX_LE;
+		if (!silent) {
+			if (offset == 0) {
+				printk(KERN_ERR "qnx6: wrong signature (magic)"
+					" in superblock #1.\n");
+			} else {
+				printk(KERN_INFO "qnx6: wrong signature (magic)"
+					" at position (0x%lx) - will try"
+					" alternative position (0x0000).\n",
+						offset * s->s_blocksize);
+			}
+		}
+		brelse(bh);
+		return NULL;
+	}
+	return bh;
+}
+
+static struct inode *qnx6_private_inode(struct super_block *s,
+					struct qnx6_root_node *p);
+
+static int qnx6_fill_super(struct super_block *s, void *data, int silent)
+{
+	struct buffer_head *bh1 = NULL, *bh2 = NULL;
+	struct qnx6_super_block *sb1 = NULL, *sb2 = NULL;
+	struct qnx6_sb_info *sbi;
+	struct inode *root;
+	const char *errmsg;
+	struct qnx6_sb_info *qs;
+	int ret = -EINVAL;
+	u64 offset;
+	int bootblock_offset = QNX6_BOOTBLOCK_SIZE;
+
+	qs = kzalloc(sizeof(struct qnx6_sb_info), GFP_KERNEL);
+	if (!qs)
+		return -ENOMEM;
+	s->s_fs_info = qs;
+
+	/* Superblock always is 512 Byte long */
+	if (!sb_set_blocksize(s, QNX6_SUPERBLOCK_SIZE)) {
+		printk(KERN_ERR "qnx6: unable to set blocksize\n");
+		goto outnobh;
+	}
+
+	/* parse the mount-options */
+	if (!qnx6_parse_options((char *) data, s)) {
+		printk(KERN_ERR "qnx6: invalid mount options.\n");
+		goto outnobh;
+	}
+	if (test_opt(s, MMI_FS)) {
+		sb1 = qnx6_mmi_fill_super(s, silent);
+		if (sb1)
+			goto mmi_success;
+		else
+			goto outnobh;
+	}
+	sbi = QNX6_SB(s);
+	sbi->s_bytesex = BYTESEX_LE;
+	/* Check the superblock signatures
+	   start with the first superblock */
+	bh1 = qnx6_check_first_superblock(s,
+		bootblock_offset / QNX6_SUPERBLOCK_SIZE, silent);
+	if (!bh1) {
+		/* try again without bootblock offset */
+		bh1 = qnx6_check_first_superblock(s, 0, silent);
+		if (!bh1) {
+			printk(KERN_ERR "qnx6: unable to read the first superblock\n");
+			goto outnobh;
+		}
+		/* seems that no bootblock at partition start */
+		bootblock_offset = 0;
+	}
+	sb1 = (struct qnx6_super_block *)bh1->b_data;
+
+#ifdef CONFIG_QNX6FS_DEBUG
+	qnx6_superblock_debug(sb1, s);
+#endif
+
+	/* checksum check - start at byte 8 and end at byte 512 */
+	if (fs32_to_cpu(sbi, sb1->sb_checksum) !=
+			crc32_be(0, (char *)(bh1->b_data + 8), 504)) {
+		printk(KERN_ERR "qnx6: superblock #1 checksum error\n");
+		goto out;
+	}
+
+	/* set new blocksize */
+	if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) {
+		printk(KERN_ERR "qnx6: unable to set blocksize\n");
+		goto out;
+	}
+	/* blocksize invalidates bh - pull it back in */
+	brelse(bh1);
+	bh1 = sb_bread(s, bootblock_offset >> s->s_blocksize_bits);
+	if (!bh1)
+		goto outnobh;
+	sb1 = (struct qnx6_super_block *)bh1->b_data;
+
+	/* calculate second superblock blocknumber */
+	offset = fs32_to_cpu(sbi, sb1->sb_num_blocks) +
+		(bootblock_offset >> s->s_blocksize_bits) +
+		(QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits);
+
+	/* set bootblock offset */
+	sbi->s_blks_off = (bootblock_offset >> s->s_blocksize_bits) +
+			  (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits);
+
+	/* next the second superblock */
+	bh2 = sb_bread(s, offset);
+	if (!bh2) {
+		printk(KERN_ERR "qnx6: unable to read the second superblock\n");
+		goto out;
+	}
+	sb2 = (struct qnx6_super_block *)bh2->b_data;
+	if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) {
+		if (!silent)
+			printk(KERN_ERR "qnx6: wrong signature (magic)"
+					" in superblock #2.\n");
+		goto out;
+	}
+
+	/* checksum check - start at byte 8 and end at byte 512 */
+	if (fs32_to_cpu(sbi, sb2->sb_checksum) !=
+				crc32_be(0, (char *)(bh2->b_data + 8), 504)) {
+		printk(KERN_ERR "qnx6: superblock #2 checksum error\n");
+		goto out;
+	}
+
+	if (fs64_to_cpu(sbi, sb1->sb_serial) >=
+					fs64_to_cpu(sbi, sb2->sb_serial)) {
+		/* superblock #1 active */
+		sbi->sb_buf = bh1;
+		sbi->sb = (struct qnx6_super_block *)bh1->b_data;
+		brelse(bh2);
+		printk(KERN_INFO "qnx6: superblock #1 active\n");
+	} else {
+		/* superblock #2 active */
+		sbi->sb_buf = bh2;
+		sbi->sb = (struct qnx6_super_block *)bh2->b_data;
+		brelse(bh1);
+		printk(KERN_INFO "qnx6: superblock #2 active\n");
+	}
+mmi_success:
+	/* sanity check - limit maximum indirect pointer levels */
+	if (sb1->Inode.levels > QNX6_PTR_MAX_LEVELS) {
+		printk(KERN_ERR "qnx6: too many inode levels (max %i, sb %i)\n",
+			QNX6_PTR_MAX_LEVELS, sb1->Inode.levels);
+		goto out;
+	}
+	if (sb1->Longfile.levels > QNX6_PTR_MAX_LEVELS) {
+		printk(KERN_ERR "qnx6: too many longfilename levels"
+				" (max %i, sb %i)\n",
+			QNX6_PTR_MAX_LEVELS, sb1->Longfile.levels);
+		goto out;
+	}
+	s->s_op = &qnx6_sops;
+	s->s_magic = QNX6_SUPER_MAGIC;
+	s->s_flags |= MS_RDONLY;        /* Yup, read-only yet */
+
+	/* ease the later tree level calculations */
+	sbi = QNX6_SB(s);
+	sbi->s_ptrbits = ilog2(s->s_blocksize / 4);
+	sbi->inodes = qnx6_private_inode(s, &sb1->Inode);
+	if (!sbi->inodes)
+		goto out;
+	sbi->longfile = qnx6_private_inode(s, &sb1->Longfile);
+	if (!sbi->longfile)
+		goto out1;
+
+	/* prefetch root inode */
+	root = qnx6_iget(s, QNX6_ROOT_INO);
+	if (IS_ERR(root)) {
+		printk(KERN_ERR "qnx6: get inode failed\n");
+		ret = PTR_ERR(root);
+		goto out2;
+	}
+
+	ret = -ENOMEM;
+	s->s_root = d_make_root(root);
+	if (!s->s_root)
+		goto out2;
+
+	ret = -EINVAL;
+	errmsg = qnx6_checkroot(s);
+	if (errmsg != NULL) {
+		if (!silent)
+			printk(KERN_ERR "qnx6: %s\n", errmsg);
+		goto out3;
+	}
+	return 0;
+
+out3:
+	dput(s->s_root);
+	s->s_root = NULL;
+out2:
+	iput(sbi->longfile);
+out1:
+	iput(sbi->inodes);
+out:
+	if (bh1)
+		brelse(bh1);
+	if (bh2)
+		brelse(bh2);
+outnobh:
+	kfree(qs);
+	s->s_fs_info = NULL;
+	return ret;
+}
+
+static void qnx6_put_super(struct super_block *sb)
+{
+	struct qnx6_sb_info *qs = QNX6_SB(sb);
+	brelse(qs->sb_buf);
+	iput(qs->longfile);
+	iput(qs->inodes);
+	kfree(qs);
+	sb->s_fs_info = NULL;
+	return;
+}
+
+static sector_t qnx6_bmap(struct address_space *mapping, sector_t block)
+{
+	return generic_block_bmap(mapping, block, qnx6_get_block);
+}
+static const struct address_space_operations qnx6_aops = {
+	.readpage	= qnx6_readpage,
+	.readpages	= qnx6_readpages,
+	.bmap		= qnx6_bmap
+};
+
+static struct inode *qnx6_private_inode(struct super_block *s,
+					struct qnx6_root_node *p)
+{
+	struct inode *inode = new_inode(s);
+	if (inode) {
+		struct qnx6_inode_info *ei = QNX6_I(inode);
+		struct qnx6_sb_info *sbi = QNX6_SB(s);
+		inode->i_size = fs64_to_cpu(sbi, p->size);
+		memcpy(ei->di_block_ptr, p->ptr, sizeof(p->ptr));
+		ei->di_filelevels = p->levels;
+		inode->i_mode = S_IFREG | S_IRUSR; /* probably wrong */
+		inode->i_mapping->a_ops = &qnx6_aops;
+	}
+	return inode;
+}
+
+struct inode *qnx6_iget(struct super_block *sb, unsigned ino)
+{
+	struct qnx6_sb_info *sbi = QNX6_SB(sb);
+	struct qnx6_inode_entry *raw_inode;
+	struct inode *inode;
+	struct qnx6_inode_info	*ei;
+	struct address_space *mapping;
+	struct page *page;
+	u32 n, offs;
+
+	inode = iget_locked(sb, ino);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+
+	ei = QNX6_I(inode);
+
+	inode->i_mode = 0;
+
+	if (ino == 0) {
+		printk(KERN_ERR "qnx6: bad inode number on dev %s: %u is "
+				"out of range\n",
+		       sb->s_id, ino);
+		iget_failed(inode);
+		return ERR_PTR(-EIO);
+	}
+	n = (ino - 1) >> (PAGE_CACHE_SHIFT - QNX6_INODE_SIZE_BITS);
+	offs = (ino - 1) & (~PAGE_CACHE_MASK >> QNX6_INODE_SIZE_BITS);
+	mapping = sbi->inodes->i_mapping;
+	page = read_mapping_page(mapping, n, NULL);
+	if (IS_ERR(page)) {
+		printk(KERN_ERR "qnx6: major problem: unable to read inode from "
+		       "dev %s\n", sb->s_id);
+		iget_failed(inode);
+		return ERR_CAST(page);
+	}
+	kmap(page);
+	raw_inode = ((struct qnx6_inode_entry *)page_address(page)) + offs;
+
+	inode->i_mode    = fs16_to_cpu(sbi, raw_inode->di_mode);
+	inode->i_uid     = (uid_t)fs32_to_cpu(sbi, raw_inode->di_uid);
+	inode->i_gid     = (gid_t)fs32_to_cpu(sbi, raw_inode->di_gid);
+	inode->i_size    = fs64_to_cpu(sbi, raw_inode->di_size);
+	inode->i_mtime.tv_sec   = fs32_to_cpu(sbi, raw_inode->di_mtime);
+	inode->i_mtime.tv_nsec = 0;
+	inode->i_atime.tv_sec   = fs32_to_cpu(sbi, raw_inode->di_atime);
+	inode->i_atime.tv_nsec = 0;
+	inode->i_ctime.tv_sec   = fs32_to_cpu(sbi, raw_inode->di_ctime);
+	inode->i_ctime.tv_nsec = 0;
+
+	/* calc blocks based on 512 byte blocksize */
+	inode->i_blocks = (inode->i_size + 511) >> 9;
+
+	memcpy(&ei->di_block_ptr, &raw_inode->di_block_ptr,
+				sizeof(raw_inode->di_block_ptr));
+	ei->di_filelevels = raw_inode->di_filelevels;
+
+	if (S_ISREG(inode->i_mode)) {
+		inode->i_fop = &generic_ro_fops;
+		inode->i_mapping->a_ops = &qnx6_aops;
+	} else if (S_ISDIR(inode->i_mode)) {
+		inode->i_op = &qnx6_dir_inode_operations;
+		inode->i_fop = &qnx6_dir_operations;
+		inode->i_mapping->a_ops = &qnx6_aops;
+	} else if (S_ISLNK(inode->i_mode)) {
+		inode->i_op = &page_symlink_inode_operations;
+		inode->i_mapping->a_ops = &qnx6_aops;
+	} else
+		init_special_inode(inode, inode->i_mode, 0);
+	qnx6_put_page(page);
+	unlock_new_inode(inode);
+	return inode;
+}
+
+static struct kmem_cache *qnx6_inode_cachep;
+
+static struct inode *qnx6_alloc_inode(struct super_block *sb)
+{
+	struct qnx6_inode_info *ei;
+	ei = kmem_cache_alloc(qnx6_inode_cachep, GFP_KERNEL);
+	if (!ei)
+		return NULL;
+	return &ei->vfs_inode;
+}
+
+static void qnx6_i_callback(struct rcu_head *head)
+{
+	struct inode *inode = container_of(head, struct inode, i_rcu);
+	INIT_LIST_HEAD(&inode->i_dentry);
+	kmem_cache_free(qnx6_inode_cachep, QNX6_I(inode));
+}
+
+static void qnx6_destroy_inode(struct inode *inode)
+{
+	call_rcu(&inode->i_rcu, qnx6_i_callback);
+}
+
+static void init_once(void *foo)
+{
+	struct qnx6_inode_info *ei = (struct qnx6_inode_info *) foo;
+
+	inode_init_once(&ei->vfs_inode);
+}
+
+static int init_inodecache(void)
+{
+	qnx6_inode_cachep = kmem_cache_create("qnx6_inode_cache",
+					     sizeof(struct qnx6_inode_info),
+					     0, (SLAB_RECLAIM_ACCOUNT|
+						SLAB_MEM_SPREAD),
+					     init_once);
+	if (!qnx6_inode_cachep)
+		return -ENOMEM;
+	return 0;
+}
+
+static void destroy_inodecache(void)
+{
+	kmem_cache_destroy(qnx6_inode_cachep);
+}
+
+static struct dentry *qnx6_mount(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data)
+{
+	return mount_bdev(fs_type, flags, dev_name, data, qnx6_fill_super);
+}
+
+static struct file_system_type qnx6_fs_type = {
+	.owner		= THIS_MODULE,
+	.name		= "qnx6",
+	.mount		= qnx6_mount,
+	.kill_sb	= kill_block_super,
+	.fs_flags	= FS_REQUIRES_DEV,
+};
+
+static int __init init_qnx6_fs(void)
+{
+	int err;
+
+	err = init_inodecache();
+	if (err)
+		return err;
+
+	err = register_filesystem(&qnx6_fs_type);
+	if (err) {
+		destroy_inodecache();
+		return err;
+	}
+
+	printk(KERN_INFO "QNX6 filesystem 1.0.0 registered.\n");
+	return 0;
+}
+
+static void __exit exit_qnx6_fs(void)
+{
+	unregister_filesystem(&qnx6_fs_type);
+	destroy_inodecache();
+}
+
+module_init(init_qnx6_fs)
+module_exit(exit_qnx6_fs)
+MODULE_LICENSE("GPL");

fs/qnx6/namei.c

···
+/*
+ * QNX6 file system, Linux implementation.
+ *
+ * Version : 1.0.0
+ *
+ * History :
+ *
+ * 01-02-2012 by Kai Bankett ([e-mail]) : first release.
+ * 16-02-2012 pagemap extension by Al Viro
+ *
+ */
+
+#include "qnx6.h"
+
+struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
+				struct nameidata *nd)
+{
+	unsigned ino;
+	struct page *page;
+	struct inode *foundinode = NULL;
+	const char *name = dentry->d_name.name;
+	int len = dentry->d_name.len;
+
+	if (len > QNX6_LONG_NAME_MAX)
+		return ERR_PTR(-ENAMETOOLONG);
+
+	ino = qnx6_find_entry(len, dir, name, &page);
+	if (ino) {
+		foundinode = qnx6_iget(dir->i_sb, ino);
+		qnx6_put_page(page);
+		if (IS_ERR(foundinode)) {
+			QNX6DEBUG((KERN_ERR "qnx6: lookup->iget -> "
+				" error %ld\n", PTR_ERR(foundinode)));
+			return ERR_CAST(foundinode);
+		}
+	} else {
+		QNX6DEBUG((KERN_INFO "qnx6_lookup: not found %s\n", name));
+		return NULL;
+	}
+	d_add(dentry, foundinode);
+	return NULL;
+}

fs/qnx6/qnx6.h

···
+/*
+ * QNX6 file system, Linux implementation.
+ *
+ * Version : 1.0.0
+ *
+ * History :
+ *
+ * 01-02-2012 by Kai Bankett ([e-mail]) : first release.
+ * 16-02-2012 page map extension by Al Viro
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+
+typedef __u16 __bitwise __fs16;
+typedef __u32 __bitwise __fs32;
+typedef __u64 __bitwise __fs64;
+
+#include <linux/qnx6_fs.h>
+
+#ifdef CONFIG_QNX6FS_DEBUG
+#define QNX6DEBUG(X) printk X
+#else
+#define QNX6DEBUG(X) (void) 0
+#endif
+
+struct qnx6_sb_info {
+	struct buffer_head	*sb_buf;	/* superblock buffer */
+	struct qnx6_super_block	*sb;		/* our superblock */
+	int			s_blks_off;	/* blkoffset fs-startpoint */
+	int			s_ptrbits;	/* indirect pointer bitfield */
+	unsigned long		s_mount_opt;	/* all mount options */
+	int			s_bytesex;	/* holds endianess info */
+	struct inode *		inodes;
+	struct inode *		longfile;
+};
+
+struct qnx6_inode_info {
+	__fs32			di_block_ptr[QNX6_NO_DIRECT_POINTERS];
+	__u8			di_filelevels;
+	__u32			i_dir_start_lookup;
+	struct inode		vfs_inode;
+};
+
+extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
+extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
+					struct nameidata *nd);
+
+#ifdef CONFIG_QNX6FS_DEBUG
+extern void qnx6_superblock_debug(struct qnx6_super_block *,
+						struct super_block *);
+#endif
+
+extern const struct inode_operations qnx6_dir_inode_operations;
+extern const struct file_operations qnx6_dir_operations;
+
+static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
+static inline struct qnx6_inode_info *QNX6_I(struct inode *inode)
+{
+	return container_of(inode, struct qnx6_inode_info, vfs_inode);
+}
+
+#define clear_opt(o, opt)		(o &= ~(QNX6_MOUNT_##opt))
+#define set_opt(o, opt)			(o |= (QNX6_MOUNT_##opt))
+#define test_opt(sb, opt)		(QNX6_SB(sb)->s_mount_opt & \
+					 QNX6_MOUNT_##opt)
+enum {
+	BYTESEX_LE,
+	BYTESEX_BE,
+};
+
+static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n)
+{
+	if (sbi->s_bytesex == BYTESEX_LE)
+		return le64_to_cpu((__force __le64)n);
+	else
+		return be64_to_cpu((__force __be64)n);
+}
+
+static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n)
+{
+	if (sbi->s_bytesex == BYTESEX_LE)
+		return (__force __fs64)cpu_to_le64(n);
+	else
+		return (__force __fs64)cpu_to_be64(n);
+}
+
+static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n)
+{
+	if (sbi->s_bytesex == BYTESEX_LE)
+		return le32_to_cpu((__force __le32)n);
+	else
+		return be32_to_cpu((__force __be32)n);
+}
+
+static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n)
+{
+	if (sbi->s_bytesex == BYTESEX_LE)
+		return (__force __fs32)cpu_to_le32(n);
+	else
+		return (__force __fs32)cpu_to_be32(n);
+}
+
+static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n)
+{
+	if (sbi->s_bytesex == BYTESEX_LE)
+		return le16_to_cpu((__force __le16)n);
+	else
+		return be16_to_cpu((__force __be16)n);
+}
+
+static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n)
+{
+	if (sbi->s_bytesex == BYTESEX_LE)
+		return (__force __fs16)cpu_to_le16(n);
+	else
+		return (__force __fs16)cpu_to_be16(n);
+}
+
+extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s,
+						    int silent);
+
+static inline void qnx6_put_page(struct page *page)
+{
+	kunmap(page);
+	page_cache_release(page);
+}
+
+extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
+				struct page **res_page);

fs/qnx6/super_mmi.c

···
+/*
+ * QNX6 file system, Linux implementation.
+ *
+ * Version : 1.0.0
+ *
+ * History :
+ *
+ * 01-02-2012 by Kai Bankett ([e-mail]) : first release.
+ *
+ */
+
+#include <linux/buffer_head.h>
+#include <linux/slab.h>
+#include <linux/crc32.h>
+#include "qnx6.h"
+
+static void qnx6_mmi_copy_sb(struct qnx6_super_block *qsb,
+		struct qnx6_mmi_super_block *sb)
+{
+	qsb->sb_magic = sb->sb_magic;
+	qsb->sb_checksum = sb->sb_checksum;
+	qsb->sb_serial = sb->sb_serial;
+	qsb->sb_blocksize = sb->sb_blocksize;
+	qsb->sb_num_inodes = sb->sb_num_inodes;
+	qsb->sb_free_inodes = sb->sb_free_inodes;
+	qsb->sb_num_blocks = sb->sb_num_blocks;
+	qsb->sb_free_blocks = sb->sb_free_blocks;
+
+	/* the rest of the superblock is the same */
+	memcpy(&qsb->Inode, &sb->Inode, sizeof(sb->Inode));
+	memcpy(&qsb->Bitmap, &sb->Bitmap, sizeof(sb->Bitmap));
+	memcpy(&qsb->Longfile, &sb->Longfile, sizeof(sb->Longfile));
+}
+
+struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent)
+{
+	struct buffer_head *bh1, *bh2 = NULL;
+	struct qnx6_mmi_super_block *sb1, *sb2;
+	struct qnx6_super_block *qsb = NULL;
+	struct qnx6_sb_info *sbi;
+	__u64 offset;
+
+	/* Check the superblock signatures
+	   start with the first superblock */
+	bh1 = sb_bread(s, 0);
+	if (!bh1) {
+		printk(KERN_ERR "qnx6: Unable to read first mmi superblock\n");
+		return NULL;
+	}
+	sb1 = (struct qnx6_mmi_super_block *)bh1->b_data;
+	sbi = QNX6_SB(s);
+	if (fs32_to_cpu(sbi, sb1->sb_magic) != QNX6_SUPER_MAGIC) {
+		if (!silent) {
+			printk(KERN_ERR "qnx6: wrong signature (magic) in"
+					" superblock #1.\n");
+			goto out;
+		}
+	}
+
+	/* checksum check - start at byte 8 and end at byte 512 */
+	if (fs32_to_cpu(sbi, sb1->sb_checksum) !=
+				crc32_be(0, (char *)(bh1->b_data + 8), 504)) {
+		printk(KERN_ERR "qnx6: superblock #1 checksum error\n");
+		goto out;
+	}
+
+	/* calculate second superblock blocknumber */
+	offset = fs32_to_cpu(sbi, sb1->sb_num_blocks) + QNX6_SUPERBLOCK_AREA /
+					fs32_to_cpu(sbi, sb1->sb_blocksize);
+
+	/* set new blocksize */
+	if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) {
+		printk(KERN_ERR "qnx6: unable to set blocksize\n");
+		goto out;
+	}
+	/* blocksize invalidates bh - pull it back in */
+	brelse(bh1);
+	bh1 = sb_bread(s, 0);
+	if (!bh1)
+		goto out;
+	sb1 = (struct qnx6_mmi_super_block *)bh1->b_data;
+
+	/* read second superblock */
+	bh2 = sb_bread(s, offset);
+	if (!bh2) {
+		printk(KERN_ERR "qnx6: unable to read the second superblock\n");
+		goto out;
+	}
+	sb2 = (struct qnx6_mmi_super_block *)bh2->b_data;
+	if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) {
+		if (!silent)
+			printk(KERN_ERR "qnx6: wrong signature (magic) in"
+					" superblock #2.\n");
+		goto out;
+	}
+
+	/* checksum check - start at byte 8 and end at byte 512 */
+	if (fs32_to_cpu(sbi, sb2->sb_checksum)
+			!= crc32_be(0, (char *)(bh2->b_data + 8), 504)) {
+		printk(KERN_ERR "qnx6: superblock #1 checksum error\n");
+		goto out;
+	}
+
+	qsb = kmalloc(sizeof(*qsb), GFP_KERNEL);
+	if (!qsb) {
+		printk(KERN_ERR "qnx6: unable to allocate memory.\n");
+		goto out;
+	}
+
+	if (fs64_to_cpu(sbi, sb1->sb_serial) >
+					fs64_to_cpu(sbi, sb2->sb_serial)) {
+		/* superblock #1 active */
+		qnx6_mmi_copy_sb(qsb, sb1);
+#ifdef CONFIG_QNX6FS_DEBUG
+		qnx6_superblock_debug(qsb, s);
+#endif
+		memcpy(bh1->b_data, qsb, sizeof(struct qnx6_super_block));
+
+		sbi->sb_buf = bh1;
+		sbi->sb = (struct qnx6_super_block *)bh1->b_data;
+		brelse(bh2);
+		printk(KERN_INFO "qnx6: superblock #1 active\n");
+	} else {
+		/* superblock #2 active */
+		qnx6_mmi_copy_sb(qsb, sb2);
+#ifdef CONFIG_QNX6FS_DEBUG
+		qnx6_superblock_debug(qsb, s);
+#endif
+		memcpy(bh2->b_data, qsb, sizeof(struct qnx6_super_block));
+
+		sbi->sb_buf = bh2;
+		sbi->sb = (struct qnx6_super_block *)bh2->b_data;
+		brelse(bh1);
+		printk(KERN_INFO "qnx6: superblock #2 active\n");
+	}
+	kfree(qsb);
+
+	/* offset for mmi_fs is just SUPERBLOCK_AREA bytes */
+	sbi->s_blks_off = QNX6_SUPERBLOCK_AREA / s->s_blocksize;
+
+	/* success */
+	return sbi->sb;
+
+out:
+	if (bh1 != NULL)
+		brelse(bh1);
+	if (bh2 != NULL)
+		brelse(bh2);
+	return NULL;
+}

fs/ramfs/inode.c

···
 int ramfs_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct ramfs_fs_info *fsi;
-	struct inode *inode = NULL;
-	struct dentry *root;
+	struct inode *inode;
 	int err;
 
 	save_mount_options(sb, data);
 
 	fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
 	sb->s_fs_info = fsi;
-	if (!fsi) {
-		err = -ENOMEM;
-		goto fail;
-	}
+	if (!fsi)
+		return -ENOMEM;
 
 	err = ramfs_parse_options(data, &fsi->mount_opts);
 	if (err)
-		goto fail;
+		return err;
 
 	sb->s_maxbytes		= MAX_LFS_FILESIZE;
 	sb->s_blocksize		= PAGE_CACHE_SIZE;
···
 	sb->s_time_gran		= 1;
 
 	inode = ramfs_get_inode(sb, NULL, S_IFDIR | fsi->mount_opts.mode, 0);
-	if (!inode) {
-		err = -ENOMEM;
-		goto fail;
-	}
-
-	root = d_alloc_root(inode);
-	sb->s_root = root;
-	if (!root) {
-		err = -ENOMEM;
-		goto fail;
-	}
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root)
+		return -ENOMEM;
 
 	return 0;
-fail:
-	kfree(fsi);
-	sb->s_fs_info = NULL;
-	iput(inode);
-	return err;
 }
 
 struct dentry *ramfs_mount(struct file_system_type *fs_type,

fs/reiserfs/bitmap.c

···
 /* Reiserfs block (de)allocator, bitmap-based. */
 
 #include <linux/time.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/errno.h>
 #include <linux/buffer_head.h>
 #include <linux/kernel.h>
 #include <linux/pagemap.h>
 #include <linux/vmalloc.h>
-#include <linux/reiserfs_fs_sb.h>
-#include <linux/reiserfs_fs_i.h>
 #include <linux/quotaops.h>
 #include <linux/seq_file.h>
 

fs/reiserfs/dir.c

···
 #include <linux/string.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/stat.h>
 #include <linux/buffer_head.h>
 #include <linux/slab.h>

fs/reiserfs/do_balan.c

···
 
 #include <asm/uaccess.h>
 #include <linux/time.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/buffer_head.h>
 #include <linux/kernel.h>
 

fs/reiserfs/file.c

···
  */
 
 #include <linux/time.h>
-#include <linux/reiserfs_fs.h>
-#include <linux/reiserfs_acl.h>
-#include <linux/reiserfs_xattr.h>
+#include "reiserfs.h"
+#include "acl.h"
+#include "xattr.h"
 #include <asm/uaccess.h>
 #include <linux/pagemap.h>
 #include <linux/swap.h>

fs/reiserfs/fix_node.c

···
 #include <linux/time.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/buffer_head.h>
 
 /* To make any changes in the tree we find a node, that contains item

fs/reiserfs/hashes.c

···
 //
 
 #include <linux/kernel.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <asm/types.h>
 
 #define DELTA 0x9E3779B9

fs/reiserfs/ibalance.c

···
 #include <asm/uaccess.h>
 #include <linux/string.h>
 #include <linux/time.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/buffer_head.h>
 
 /* this is one and only function that is used outside (do_balance.c) */

fs/reiserfs/inode.c

···
 
 #include <linux/time.h>
 #include <linux/fs.h>
-#include <linux/reiserfs_fs.h>
-#include <linux/reiserfs_acl.h>
-#include <linux/reiserfs_xattr.h>
+#include "reiserfs.h"
+#include "acl.h"
+#include "xattr.h"
 #include <linux/exportfs.h>
 #include <linux/pagemap.h>
 #include <linux/highmem.h>

fs/reiserfs/ioctl.c

···
 #include <linux/capability.h>
 #include <linux/fs.h>
 #include <linux/mount.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/time.h>
 #include <asm/uaccess.h>
 #include <linux/pagemap.h>

fs/reiserfs/item_ops.c

···
  */
 
 #include <linux/time.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 
 // this contains item handlers for old item types: sd, direct,
 // indirect, directory

fs/reiserfs/journal.c

···
 #include <linux/time.h>
 #include <linux/semaphore.h>
 #include <linux/vmalloc.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/fcntl.h>

fs/reiserfs/lbalance.c

···
 #include <asm/uaccess.h>
 #include <linux/string.h>
 #include <linux/time.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/buffer_head.h>
 
 /* these are used in do_balance.c */

fs/reiserfs/lock.c

···
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/mutex.h>
 
 /*

fs/reiserfs/namei.c

···
 #include <linux/time.h>
 #include <linux/bitops.h>
 #include <linux/slab.h>
-#include <linux/reiserfs_fs.h>
-#include <linux/reiserfs_acl.h>
-#include <linux/reiserfs_xattr.h>
+#include "reiserfs.h"
+#include "acl.h"
+#include "xattr.h"
 #include <linux/quotaops.h>
 
 #define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { inc_nlink(i); if (i->i_nlink >= REISERFS_LINK_MAX) set_nlink(i, 1); }

fs/reiserfs/objectid.c

···
 #include <linux/string.h>
 #include <linux/random.h>
 #include <linux/time.h>
-#include <linux/reiserfs_fs.h>
-#include <linux/reiserfs_fs_sb.h>
+#include "reiserfs.h"
 
 // find where objectid map starts
 #define objectid_map(s,rs) (old_format_only (s) ? \

fs/reiserfs/prints.c

···
 
 #include <linux/time.h>
 #include <linux/fs.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/string.h>
 #include <linux/buffer_head.h>
 
···
     Numbering scheme for panic used by Vladimir and Anatoly( Hans completely ignores this scheme, and considers it
     pointless complexity):
 
-    panics in reiserfs_fs.h have numbers from 1000 to 1999
+    panics in reiserfs.h have numbers from 1000 to 1999
     super.c				        2000 to 2999
     preserve.c (unused)			    3000 to 3999
     bitmap.c				    4000 to 4999

fs/reiserfs/procfs.c

···
 #include <linux/time.h>
 #include <linux/seq_file.h>
 #include <asm/uaccess.h>
-#include <linux/reiserfs_fs.h>
-#include <linux/reiserfs_fs_sb.h>
+#include "reiserfs.h"
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 

fs/reiserfs/reiserfs.h

···
+/*
+ * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for licensing and copyright details
+ */
+
+#include <linux/reiserfs_fs.h>
+
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/workqueue.h>
+#include <asm/unaligned.h>
+#include <linux/bitops.h>
+#include <linux/proc_fs.h>
+#include <linux/buffer_head.h>
+
+/* the 32 bit compat definitions with int argument */
+#define REISERFS_IOC32_UNPACK		_IOW(0xCD, 1, int)
+#define REISERFS_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
+#define REISERFS_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
+#define REISERFS_IOC32_GETVERSION	FS_IOC32_GETVERSION
+#define REISERFS_IOC32_SETVERSION	FS_IOC32_SETVERSION
+
+struct reiserfs_journal_list;
+
+/** bitmasks for i_flags field in reiserfs-specific part of inode */
+typedef enum {
+    /** this says what format of key do all items (but stat data) of
+      an object have.  If this is set, that format is 3.6 otherwise
+      - 3.5 */
+	i_item_key_version_mask = 0x0001,
+    /** If this is unset, object has 3.5 stat data, otherwise, it has
+      3.6 stat data with 64bit size, 32bit nlink etc. */
+	i_stat_data_version_mask = 0x0002,
+    /** file might need tail packing on close */
+	i_pack_on_close_mask = 0x0004,
+    /** don't pack tail of file */
+	i_nopack_mask = 0x0008,
+    /** If those is set, "safe link" was created for this file during
+      truncate or unlink. Safe link is used to avoid leakage of disk
+      space on crash with some files open, but unlinked. */
+	i_link_saved_unlink_mask = 0x0010,
+	i_link_saved_truncate_mask = 0x0020,
+	i_has_xattr_dir = 0x0040,
+	i_data_log = 0x0080,
+} reiserfs_inode_flags;
+
+struct reiserfs_inode_info {
+	__u32 i_key[4];		/* key is still 4 32 bit integers */
+    /** transient inode flags that are never stored on disk. Bitmasks
+      for this field are defined above. */
+	__u32 i_flags;
+
+	__u32 i_first_direct_byte;	// offset of first byte stored in direct item.
+
+	/* copy of persistent inode flags read from sd_attrs. */
+	__u32 i_attrs;
+
+	int i_prealloc_block;	/* first unused block of a sequence of unused blocks */
+	int i_prealloc_count;	/* length of that sequence */
+	struct list_head i_prealloc_list;	/* per-transaction list of inodes which
+						 * have preallocated blocks */
+
+	unsigned new_packing_locality:1;	/* new_packig_locality is created; new blocks
+						 * for the contents of this directory should be
+						 * displaced */
+
+	/* we use these for fsync or O_SYNC to decide which transaction
+	 ** needs to be committed in order for this inode to be properly
+	 ** flushed */
+	unsigned int i_trans_id;
+	struct reiserfs_journal_list *i_jl;
+	atomic_t openers;
+	struct mutex tailpack;
+#ifdef CONFIG_REISERFS_FS_XATTR
+	struct rw_semaphore i_xattr_sem;
+#endif
+	struct inode vfs_inode;
+};
+
+typedef enum {
+	reiserfs_attrs_cleared = 0x00000001,
+} reiserfs_super_block_flags;
+
+/* struct reiserfs_super_block accessors/mutators
+ * since this is a disk structure, it will always be in
+ * little endian format. */
+#define sb_block_count(sbp)         (le32_to_cpu((sbp)->s_v1.s_block_count))
+#define set_sb_block_count(sbp,v)   ((sbp)->s_v1.s_block_count = cpu_to_le32(v))
+#define sb_free_blocks(sbp)         (le32_to_cpu((sbp)->s_v1.s_free_blocks))
+#define set_sb_free_blocks(sbp,v)   ((sbp)->s_v1.s_free_blocks = cpu_to_le32(v))
+#define sb_root_block(sbp)          (le32_to_cpu((sbp)->s_v1.s_root_block))
+#define set_sb_root_block(sbp,v)    ((sbp)->s_v1.s_root_block = cpu_to_le32(v))
+
+#define sb_jp_journal_1st_block(sbp)  \
+              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_1st_block))
+#define set_sb_jp_journal_1st_block(sbp,v) \
+              ((sbp)->s_v1.s_journal.jp_journal_1st_block = cpu_to_le32(v))
+#define sb_jp_journal_dev(sbp) \
+              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_dev))
+#define set_sb_jp_journal_dev(sbp,v) \
+              ((sbp)->s_v1.s_journal.jp_journal_dev = cpu_to_le32(v))
+#define sb_jp_journal_size(sbp) \
+              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_size))
+#define set_sb_jp_journal_size(sbp,v) \
+              ((sbp)->s_v1.s_journal.jp_journal_size = cpu_to_le32(v))
+#define sb_jp_journal_trans_max(sbp) \
+              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_trans_max))
+#define set_sb_jp_journal_trans_max(sbp,v) \
+              ((sbp)->s_v1.s_journal.jp_journal_trans_max = cpu_to_le32(v))
+#define sb_jp_journal_magic(sbp) \
+              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_magic))
+#define set_sb_jp_journal_magic(sbp,v) \
+              ((sbp)->s_v1.s_journal.jp_journal_magic = cpu_to_le32(v))
+#define sb_jp_journal_max_batch(sbp) \
+              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_batch))
+#define set_sb_jp_journal_max_batch(sbp,v) \
+              ((sbp)->s_v1.s_journal.jp_journal_max_batch = cpu_to_le32(v))
+#define sb_jp_jourmal_max_commit_age(sbp) \
+              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_commit_age))
+#define set_sb_jp_journal_max_commit_age(sbp,v) \
+              ((sbp)->s_v1.s_journal.jp_journal_max_commit_age = cpu_to_le32(v))
+
+#define sb_blocksize(sbp)          (le16_to_cpu((sbp)->s_v1.s_blocksize))
+#define set_sb_blocksize(sbp,v)    ((sbp)->s_v1.s_blocksize = cpu_to_le16(v))
+#define sb_oid_maxsize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_maxsize))
+#define set_sb_oid_maxsize(sbp,v)  ((sbp)->s_v1.s_oid_maxsize = cpu_to_le16(v))
+#define sb_oid_cursize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_cursize))
+#define set_sb_oid_cursize(sbp,v)  ((sbp)->s_v1.s_oid_cursize = cpu_to_le16(v))
+#define sb_umount_state(sbp)       (le16_to_cpu((sbp)->s_v1.s_umount_state))
+#define set_sb_umount_state(sbp,v) ((sbp)->s_v1.s_umount_state = cpu_to_le16(v))
+#define sb_fs_state(sbp)           (le16_to_cpu((sbp)->s_v1.s_fs_state))
+#define set_sb_fs_state(sbp,v)     ((sbp)->s_v1.s_fs_state = cpu_to_le16(v))
+#define sb_hash_function_code(sbp) \
+              (le32_to_cpu((sbp)->s_v1.s_hash_function_code))
+#define set_sb_hash_function_code(sbp,v) \
+              ((sbp)->s_v1.s_hash_function_code = cpu_to_le32(v))
+#define sb_tree_height(sbp)        (le16_to_cpu((sbp)->s_v1.s_tree_height))
+#define set_sb_tree_height(sbp,v)  ((sbp)->s_v1.s_tree_height = cpu_to_le16(v))
+#define sb_bmap_nr(sbp)            (le16_to_cpu((sbp)->s_v1.s_bmap_nr))
+#define set_sb_bmap_nr(sbp,v)      ((sbp)->s_v1.s_bmap_nr = cpu_to_le16(v))
+#define sb_version(sbp)            (le16_to_cpu((sbp)->s_v1.s_version))
+#define set_sb_version(sbp,v)      ((sbp)->s_v1.s_version = cpu_to_le16(v))
+
+#define sb_mnt_count(sbp)	   (le16_to_cpu((sbp)->s_mnt_count))
+#define set_sb_mnt_count(sbp, v)   ((sbp)->s_mnt_count = cpu_to_le16(v))
+
+#define sb_reserved_for_journal(sbp) \
+              (le16_to_cpu((sbp)->s_v1.s_reserved_for_journal))
+#define set_sb_reserved_for_journal(sbp,v) \
+              ((sbp)->s_v1.s_reserved_for_journal = cpu_to_le16(v))
+
+/* LOGGING -- */
+
+/* These all interelate for performance.
+**
+** If the journal block count is smaller than n transactions, you lose speed.
+** I don't know what n is yet, I'm guessing 8-16.
+**
+** typical transaction size depends on the application, how often fsync is
+** called, and how many metadata blocks you dirty in a 30 second period.
+** The more small files (<16k) you use, the larger your transactions will
+** be.
+**
+** If your journal fills faster than dirty buffers get flushed to disk, it must flush them before allowing the journal
+** to wrap, which slows things down.  If you need high speed meta data updates, the journal should be big enough
+** to prevent wrapping before dirty meta blocks get to disk.
+**
+** If the batch max is smaller than the transaction max, you'll waste space at the end of the journal
+** because journal_end sets the next transaction to start at 0 if the next transaction has any chance of wrapping.
+**
+** The large the batch max age, the better the speed, and the more meta data changes you'll lose after a crash.
+**
+*/
+
+/* don't mess with these for a while */
+				/* we have a node size define somewhere in reiserfs_fs.h. -Hans */
+#define JOURNAL_BLOCK_SIZE  4096	/* BUG gotta get rid of this */
+#define JOURNAL_MAX_CNODE   1500	/* max cnodes to allocate. */
+#define JOURNAL_HASH_SIZE 8192
+#define JOURNAL_NUM_BITMAPS 5	/* number of copies of the bitmaps to have floating.  Must be >= 2 */
+
+/* One of these for every block in every transaction
+** Each one is in two hash tables.  First, a hash of the current transaction, and after journal_end, a
+** hash of all the in memory transactions.
+** next and prev are used by the current transaction (journal_hash).
+** hnext and hprev are used by journal_list_hash.  If a block is in more than one transaction, the journal_list_hash
+** links it in multiple times.  This allows flush_journal_list to remove just the cnode belonging
+** to a given transaction.
+*/
+struct reiserfs_journal_cnode {
+	struct buffer_head *bh;	/* real buffer head */
+	struct super_block *sb;	/* dev of real buffer head */
+	__u32 blocknr;		/* block number of real buffer head, == 0 when buffer on disk */
+	unsigned long state;
+	struct reiserfs_journal_list *jlist;	/* journal list this cnode lives in */
+	struct reiserfs_journal_cnode *next;	/* next in transaction list */
+	struct reiserfs_journal_cnode *prev;	/* prev in transaction list */
+	struct reiserfs_journal_cnode *hprev;	/* prev in hash list */
+	struct reiserfs_journal_cnode *hnext;	/* next in hash list */
+};
+
+struct reiserfs_bitmap_node {
+	int id;
+	char *data;
+	struct list_head list;
+};
+
+struct reiserfs_list_bitmap {
+	struct reiserfs_journal_list *journal_list;
+	struct reiserfs_bitmap_node **bitmaps;
+};
+
+/*
+** one of these for each transaction.  The most important part here is the j_realblock.
+** this list of cnodes is used to hash all the blocks in all the commits, to mark all the
+** real buffer heads dirty once all the commits hit the disk,
+** and to make sure every real block in a transaction is on disk before allowing the log area
+** to be overwritten */
+struct reiserfs_journal_list {
+	unsigned long j_start;
+	unsigned long j_state;
+	unsigned long j_len;
+	atomic_t j_nonzerolen;
+	atomic_t j_commit_left;
+	atomic_t j_older_commits_done;	/* all commits older than this on disk */
+	struct mutex j_commit_mutex;
+	unsigned int j_trans_id;
+	time_t j_timestamp;
+	struct reiserfs_list_bitmap *j_list_bitmap;
+	struct buffer_head *j_commit_bh;	/* commit buffer head */
+	struct reiserfs_journal_cnode *j_realblock;
+	struct reiserfs_journal_cnode *j_freedlist;	/* list of buffers that were freed during this trans.  free each of these on flush */
+	/* time ordered list of all active transactions */
+	struct list_head j_list;
+
+	/* time ordered list of all transactions we haven't tried to flush yet */
+	struct list_head j_working_list;
+
+	/* list of tail conversion targets in need of flush before commit */
+	struct list_head j_tail_bh_list;
+	/* list of data=ordered buffers in need of flush before commit */
+	struct list_head j_bh_list;
+	int j_refcount;
+};
+
+struct reiserfs_journal {
+	struct buffer_head **j_ap_blocks;	/* journal blocks on disk */
+	struct reiserfs_journal_cnode *j_last;	/* newest journal block */
+	struct reiserfs_journal_cnode *j_first;	/*  oldest journal block.  start here for traverse */
+
+	struct block_device *j_dev_bd;
+	fmode_t j_dev_mode;
+	int j_1st_reserved_block;	/* first block on s_dev of reserved area journal */
+
+	unsigned long j_state;
+	unsigned int j_trans_id;
+	unsigned long j_mount_id;
+	unsigned long j_start;	/* start of current waiting commit (index into j_ap_blocks) */
+	unsigned long j_len;	/* length of current waiting commit */
+	unsigned long j_len_alloc;	/* number of buffers requested by journal_begin() */
+	atomic_t j_wcount;	/* count of writers for current commit */
+	unsigned long j_bcount;	/* batch count. allows turning X transactions into 1 */
+	unsigned long j_first_unflushed_offset;	/* first unflushed transactions offset */
+	unsigned j_last_flush_trans_id;	/* last fully flushed journal timestamp */
+	struct buffer_head *j_header_bh;
+
+	time_t j_trans_start_time;	/* time this transaction started */
+	struct mutex j_mutex;
+	struct mutex j_flush_mutex;
+	wait_queue_head_t j_join_wait;	/* wait for current transaction to finish before starting new one */
+	atomic_t j_jlock;	/* lock for j_join_wait */
+	int j_list_bitmap_index;	/* number of next list bitmap to use */
+	int j_must_wait;	/* no more journal begins allowed. MUST sleep on j_join_wait */
+	int j_next_full_flush;	/* next journal_end will flush all journal list */
+	int j_next_async_flush;	/* next journal_end will flush all async commits */
+
+	int j_cnode_used;	/* number of cnodes on the used list */
+	int j_cnode_free;	/* number of cnodes on the free list */
+
+	unsigned int j_trans_max;	/* max number of blocks in a transaction.  */
+	unsigned int j_max_batch;	/* max number of blocks to batch into a trans */
+	unsigned int j_max_commit_age;	/* in seconds, how old can an async commit be */
+	unsigned int j_max_trans_age;	/* in seconds, how old can a transaction be */
+	unsigned int j_default_max_commit_age;	/* the default for the max commit age */
+
+	struct reiserfs_journal_cnode *j_cnode_free_list;
+	struct reiserfs_journal_cnode *j_cnode_free_orig;	/* orig pointer returned from vmalloc */
+
+	struct reiserfs_journal_list *j_current_jl;
+	int j_free_bitmap_nodes;
+	int j_used_bitmap_nodes;
+
+	int j_num_lists;	/* total number of active transactions */
+	int j_num_work_lists;	/* number that need attention from kreiserfsd */
+
+	/* debugging to make sure things are flushed in order */
+	unsigned int j_last_flush_id;
+
+	/* debugging to make sure things are committed in order */
+	unsigned int j_last_commit_id;
+
+	struct list_head j_bitmap_nodes;
+	struct list_head j_dirty_buffers;
+	spinlock_t j_dirty_buffers_lock;	/* protects j_dirty_buffers */
+
+	/* list of all active transactions */
+	struct list_head j_journal_list;
+	/* lists that haven't been touched by writeback attempts */
+	struct list_head j_working_list;
+
+	struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS];	/* array of bitmaps to record the deleted blocks */
+	struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE];	/* hash table for real buffer heads in current trans */
+	struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE];	/* hash table for all the real buffer heads in all
+										   the transactions */
+	struct list_head j_prealloc_list;	/* list of inodes which have preallocated blocks */
+	int j_persistent_trans;
+	unsigned long j_max_trans_size;
+	unsigned long j_max_batch_size;
+
+	int j_errno;
+
+	/* when flushing ordered buffers, throttle new ordered writers */
+	struct delayed_work j_work;
+	struct super_block *j_work_sb;
+	atomic_t j_async_throttle;
+};
+
+enum journal_state_bits {
+	J_WRITERS_BLOCKED = 1,	/* set when new writers not allowed */
+	J_WRITERS_QUEUED,	/* set when log is full due to too many writers */
+	J_ABORTED,		/* set when log is aborted */
+};
+
+#define JOURNAL_DESC_MAGIC "ReIsErLB"	/* ick.  magic string to find desc blocks in the journal */
+
+typedef __u32(*hashf_t) (const signed char *, int);
+
+struct reiserfs_bitmap_info {
+	__u32 free_count;
+};
+
+struct proc_dir_entry;
+
+#if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO )
+typedef unsigned long int stat_cnt_t;
+typedef struct reiserfs_proc_info_data {
+	spinlock_t lock;
+	int exiting;
+	int max_hash_collisions;
+
+	stat_cnt_t breads;
+	stat_cnt_t bread_miss;
+	stat_cnt_t search_by_key;
+	stat_cnt_t search_by_key_fs_changed;
+	stat_cnt_t search_by_key_restarted;
+
+	stat_cnt_t insert_item_restarted;
+	stat_cnt_t paste_into_item_restarted;
+	stat_cnt_t cut_from_item_restarted;
+	stat_cnt_t delete_solid_item_restarted;
+	stat_cnt_t delete_item_restarted;
+
+	stat_cnt_t leaked_oid;
+	stat_cnt_t leaves_removable;
+
+	/* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */
+	stat_cnt_t balance_at[5];	/* XXX */
+	/* sbk == search_by_key */
+	stat_cnt_t sbk_read_at[5];	/* XXX */
+	stat_cnt_t sbk_fs_changed[5];
+	stat_cnt_t sbk_restarted[5];
+	stat_cnt_t items_at[5];	/* XXX */
+	stat_cnt_t free_at[5];	/* XXX */
+	stat_cnt_t can_node_be_removed[5];	/* XXX */
+	long int lnum[5];	/* XXX */
+	long int rnum[5];	/* XXX */
+	long int lbytes[5];	/* XXX */
+	long int rbytes[5];	/* XXX */
+	stat_cnt_t get_neighbors[5];
+	stat_cnt_t get_neighbors_restart[5];
+	stat_cnt_t need_l_neighbor[5];
+	stat_cnt_t need_r_neighbor[5];
+
+	stat_cnt_t free_block;
+	struct __scan_bitmap_stats {
+		stat_cnt_t call;
+		stat_cnt_t wait;
+		stat_cnt_t bmap;
+		stat_cnt_t retry;
+		stat_cnt_t in_journal_hint;
+		stat_cnt_t in_journal_nohint;
+		stat_cnt_t stolen;
+	} scan_bitmap;
+	struct __journal_stats {
+		stat_cnt_t in_journal;
+		stat_cnt_t in_journal_bitmap;
+		stat_cnt_t in_journal_reusable;
+		stat_cnt_t lock_journal;
+		stat_cnt_t lock_journal_wait;
+		stat_cnt_t journal_being;
+		stat_cnt_t journal_relock_writers;
+		stat_cnt_t journal_relock_wcount;
+		stat_cnt_t mark_dirty;
+		stat_cnt_t mark_dirty_already;
+		stat_cnt_t mark_dirty_notjournal;
+		stat_cnt_t restore_prepared;
+		stat_cnt_t prepare;
+		stat_cnt_t prepare_retry;
+	} journal;
+} reiserfs_proc_info_data_t;
+#else
+typedef struct reiserfs_proc_info_data {
+} reiserfs_proc_info_data_t;
+#endif
+
+/* reiserfs union of in-core super block data */
+struct reiserfs_sb_info {
+	struct buffer_head *s_sbh;	/* Buffer containing the super block */
+	/* both the comment and the choice of
+	   name are unclear for s_rs -Hans */
+	struct reiserfs_super_block *s_rs;	/* Pointer to the super block in the buffer */
+	struct reiserfs_bitmap_info *s_ap_bitmap;
+	struct reiserfs_journal *s_journal;	/* pointer to journal information */
+	unsigned short s_mount_state;	/* reiserfs state (valid, invalid) */
+
+	/* Serialize writers access, replace the old bkl */
+	struct mutex lock;
+	/* Owner of the lock (can be recursive) */
+	struct task_struct *lock_owner;
+	/* Depth of the lock, start from -1 like the bkl */
+	int lock_depth;
+
+	/* Comment? -Hans */
+	void (*end_io_handler) (struct buffer_head *, int);
+	hashf_t s_hash_function;	/* pointer to function which is used
+					   to sort names in directory. Set on
+					   mount */
+	unsigned long s_mount_opt;	/* reiserfs's mount options are set
+					   here (currently - NOTAIL, NOLOG,
+					   REPLAYONLY) */
+
+	struct {		/* This is a structure that describes block allocator options */
+		unsigned long bits;	/* Bitfield for enable/disable kind of options */
+		unsigned long large_file_size;	/* size started from which we consider file to be a large one(in blocks) */
+		int border;	/* percentage of disk, border takes */
+		int preallocmin;	/* Minimal file size (in blocks) starting from which we do preallocations */
+		int preallocsize;	/* Number of blocks we try to prealloc when file
+					   reaches preallocmin size (in blocks) or
+					   prealloc_list is empty. */
+	} s_alloc_options;
+
+	/* Comment? -Hans */
+	wait_queue_head_t s_wait;
+	/* To be obsoleted soon by per buffer seals.. -Hans */
+	atomic_t s_generation_counter;	// increased by one every time the
+	// tree gets re-balanced
+	unsigned long s_properties;	/* File system properties. Currently holds
+					   on-disk FS format */
+
+	/* session statistics */
+	int s_disk_reads;
+	int s_disk_writes;
+	int s_fix_nodes;
+	int s_do_balance;
+	int s_unneeded_left_neighbor;
+	int s_good_search_by_key_reada;
+	int s_bmaps;
+	int s_bmaps_without_search;
+	int s_direct2indirect;
+	int s_indirect2direct;
+	/* set up when it's ok for reiserfs_read_inode2() to read from
+	   disk inode with nlink==0. Currently this is only used during
+	   finish_unfinished() processing at mount time */
+	int s_is_unlinked_ok;
+	reiserfs_proc_info_data_t s_proc_info_data;
+	struct proc_dir_entry *procdir;
+	int reserved_blocks;	/* amount of blocks reserved for further allocations */
+	spinlock_t bitmap_lock;	/* this lock on now only used to protect reserved_blocks variable */
+	struct dentry *priv_root;	/* root of /.reiserfs_priv */
+	struct dentry *xattr_root;	/* root of /.reiserfs_priv/xattrs */
+	int j_errno;
+#ifdef CONFIG_QUOTA
+	char *s_qf_names[MAXQUOTAS];
+	int s_jquota_fmt;
+#endif
+	char *s_jdev;		/* Stored jdev for mount option showing */
+#ifdef CONFIG_REISERFS_CHECK
+
+	struct tree_balance *cur_tb;	/*
+					 * Detects whether more than one
+					 * copy of tb exists per superblock
+					 * as a means of checking whether
+					 * do_balance is executing concurrently
+					 * against another tree reader/writer
+					 * on a same mount point.
+					 */
+#endif
+};
+
+/* Definitions of reiserfs on-disk properties: */
+#define REISERFS_3_5 0
+#define REISERFS_3_6 1
+#define REISERFS_OLD_FORMAT 2
+
+enum reiserfs_mount_options {
+/* Mount options */
+	REISERFS_LARGETAIL,	/* large tails will be created in a session */
+	REISERFS_SMALLTAIL,	/* small (for files less than block size) tails will be created in a session */
+	REPLAYONLY,		/* replay journal and return 0. Use by fsck */
+	REISERFS_CONVERT,	/* -o conv: causes conversion of old
+				   format super block to the new
+				   format. If not specified - old
+				   partition will be dealt with in a
+				   manner of 3.5.x */
+
+/* -o hash={tea, rupasov, r5, detect} is meant for properly mounting
+** reiserfs disks from 3.5.19 or earlier.  99% of the time, this option
+** is not required.  If the normal autodection code can't determine which
+** hash to use (because both hashes had the same value for a file)
+** use this option to force a specific hash.  It won't allow you to override
+** the existing hash on the FS, so if you have a tea hash disk, and mount
+** with -o hash=rupasov, the mount will fail.
+*/
+	FORCE_TEA_HASH,		/* try to force tea hash on mount */
+	FORCE_RUPASOV_HASH,	/* try to force rupasov hash on mount */
+	FORCE_R5_HASH,		/* try to force rupasov hash on mount */
+	FORCE_HASH_DETECT,	/* try to detect hash function on mount */
+
+	REISERFS_DATA_LOG,
+	REISERFS_DATA_ORDERED,
+	REISERFS_DATA_WRITEBACK,
+
+/* used for testing experimental features, makes benchmarking new
+   features with and without more convenient, should never be used by
+   users in any code shipped to users (ideally) */
+
+	REISERFS_NO_BORDER,
+	REISERFS_NO_UNHASHED_RELOCATION,
+	REISERFS_HASHED_RELOCATION,
+	REISERFS_ATTRS,
+	REISERFS_XATTRS_USER,
+	REISERFS_POSIXACL,
+	REISERFS_EXPOSE_PRIVROOT,
+	REISERFS_BARRIER_NONE,
+	REISERFS_BARRIER_FLUSH,
+
+	/* Actions on error */
+	REISERFS_ERROR_PANIC,
+	REISERFS_ERROR_RO,
+	REISERFS_ERROR_CONTINUE,
+
+	REISERFS_USRQUOTA,	/* User quota option specified */
+	REISERFS_GRPQUOTA,	/* Group quota option specified */
+
+	REISERFS_TEST1,
+	REISERFS_TEST2,
+	REISERFS_TEST3,
+	REISERFS_TEST4,
+	REISERFS_UNSUPPORTED_OPT,
+};
+
+#define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH))
+#define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH))
+#define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH))
+#define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT))
+#define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER))
+#define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION))
+#define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION))
+#define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4))
+
+#define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL))
+#define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL))
+#define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY))
+#define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS))
+#define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5))
+#define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT))
+#define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG))
+#define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED))
+#define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK))
+#define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER))
+#define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL))
+#define reiserfs_expose_privroot(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_EXPOSE_PRIVROOT))
+#define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s))
+#define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE))
+#define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH))
+
+#define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC))
+#define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO))
+
+void reiserfs_file_buffer(struct buffer_head *bh, int list);
+extern struct file_system_type reiserfs_fs_type;
+int reiserfs_resize(struct super_block *, unsigned long);
+
+#define CARRY_ON                0
+#define SCHEDULE_OCCURRED       1
+
+#define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh)
+#define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal)
+#define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block)
+#define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free)
+#define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap)
+
+#define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->)
+
+/* A safe version of the "bdevname", which returns the "s_id" field of
+ * a superblock or else "Null superblock" if the super block is NULL.
+ */
+static inline char *reiserfs_bdevname(struct super_block *s)
+{
+	return (s == NULL) ? "Null superblock" : s->s_id;
+}
+
+#define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal)))
+static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal
+						*journal)
+{
+	return test_bit(J_ABORTED, &journal->j_state);
+}
+
+/*
+ * Locking primitives. The write lock is a per superblock
+ * special mutex that has properties close to the Big Kernel Lock
+ * which was used in the previous locking scheme.
+ */
+void reiserfs_write_lock(struct super_block *s);
+void reiserfs_write_unlock(struct super_block *s);
+int reiserfs_write_lock_once(struct super_block *s);
+void reiserfs_write_unlock_once(struct super_block *s, int lock_depth);
+
+#ifdef CONFIG_REISERFS_CHECK
+void reiserfs_lock_check_recursive(struct super_block *s);
+#else
+static inline void reiserfs_lock_check_recursive(struct super_block *s) { }
+#endif
+
+/*
+ * Several mutexes depend on the write lock.
+ * However sometimes we want to relax the write lock while we hold
+ * these mutexes, according to the release/reacquire on schedule()
+ * properties of the Bkl that were used.
+ * Reiserfs performances and locking were based on this scheme.
+ * Now that the write lock is a mutex and not the bkl anymore, doing so
+ * may result in a deadlock:
+ *
+ * A acquire write_lock
+ * A acquire j_commit_mutex
+ * A release write_lock and wait for something
+ * B acquire write_lock
+ * B can't acquire j_commit_mutex and sleep
+ * A can't acquire write lock anymore
+ * deadlock
+ *
+ * What we do here is avoiding such deadlock by playing the same game
+ * than the Bkl: if we can't acquire a mutex that depends on the write lock,
+ * we release the write lock, wait a bit and then retry.
+ *
+ * The mutexes concerned by this hack are:
+ * - The commit mutex of a journal list
+ * - The flush mutex
+ * - The journal lock
+ * - The inode mutex
+ */
+static inline void reiserfs_mutex_lock_safe(struct mutex *m,
+			       struct super_block *s)
+{
+	reiserfs_lock_check_recursive(s);
+	reiserfs_write_unlock(s);
+	mutex_lock(m);
+	reiserfs_write_lock(s);
+}
+
+static inline void
+reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass,
+			       struct super_block *s)
+{
+	reiserfs_lock_check_recursive(s);
+	reiserfs_write_unlock(s);
+	mutex_lock_nested(m, subclass);
+	reiserfs_write_lock(s);
+}
+
+static inline void
+reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s)
+{
+	reiserfs_lock_check_recursive(s);
+	reiserfs_write_unlock(s);
+	down_read(sem);
+	reiserfs_write_lock(s);
+}
+
+/*
+ * When we schedule, we usually want to also release the write lock,
+ * according to the previous bkl based locking scheme of reiserfs.
+ */
+static inline void reiserfs_cond_resched(struct super_block *s)
+{
+	if (need_resched()) {
+		reiserfs_write_unlock(s);
+		schedule();
+		reiserfs_write_lock(s);
+	}
+}
+
+struct fid;
+
+/* in reading the #defines, it may help to understand that they employ
+   the following abbreviations:
+
+   B = Buffer
+   I = Item header
+   H = Height within the tree (should be changed to LEV)
+   N = Number of the item in the node
+   STAT = stat data
+   DEH = Directory Entry Header
+   EC = Entry Count
+   E = Entry number
+   UL = Unsigned Long
+   BLKH = BLocK Header
+   UNFM = UNForMatted node
+   DC = Disk Child
+   P = Path
+
+   These #defines are named by concatenating these abbreviations,
+   where first comes the arguments, and last comes the return value,
+   of the macro.
+
+*/
+
+#define USE_INODE_GENERATION_COUNTER
+
+#define REISERFS_PREALLOCATE
+#define DISPLACE_NEW_PACKING_LOCALITIES
+#define PREALLOCATION_SIZE 9
+
+/* n must be power of 2 */
+#define _ROUND_UP(x,n) (((x)+(n)-1u) & ~((n)-1u))
+
+// to be ok for alpha and others we have to align structures to 8 byte
+// boundary.
+// FIXME: do not change 4 by anything else: there is code which relies on that
+#define ROUND_UP(x) _ROUND_UP(x,8LL)
+
+/* debug levels.  Right now, CONFIG_REISERFS_CHECK means print all debug
+** messages.
+*/
+#define REISERFS_DEBUG_CODE 5	/* extra messages to help find/debug errors */
+
+void __reiserfs_warning(struct super_block *s, const char *id,
+			 const char *func, const char *fmt, ...);
+#define reiserfs_warning(s, id, fmt, args...) \
+	 __reiserfs_warning(s, id, __func__, fmt, ##args)
+/* assertions handling */
+
+/** always check a condition and panic if it's false. */
+#define __RASSERT(cond, scond, format, args...)			\
+do {									\
+	if (!(cond))							\
+		reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \
+			       __FILE__ ":%i:%s: " format "\n",		\
+			       in_interrupt() ? -1 : task_pid_nr(current), \
+			       __LINE__, __func__ , ##args);		\
+} while (0)
+
+#define RASSERT(cond, format, args...) __RASSERT(cond, #cond, format, ##args)
+
+#if defined( CONFIG_REISERFS_CHECK )
+#define RFALSE(cond, format, args...) __RASSERT(!(cond), "!(" #cond ")", format, ##args)
+#else
+#define RFALSE( cond, format, args... ) do {;} while( 0 )
+#endif
+
+#define CONSTF __attribute_const__
+/*
+ * Disk Data Structures
+ */
+
+/***************************************************************************/
+/*                             SUPER BLOCK                                 */
+/***************************************************************************/
+
+/*
+ * Structure of super block on disk, a version of which in RAM is often accessed as REISERFS_SB(s)->s_rs
+ * the version in RAM is part of a larger structure containing fields never written to disk.
+ */
+#define UNSET_HASH 0		// read_super will guess about, what hash names
+		     // in directories were sorted with
+#define TEA_HASH  1
+#define YURA_HASH 2
+#define R5_HASH   3
+#define DEFAULT_HASH R5_HASH
+
+struct journal_params {
+	__le32 jp_journal_1st_block;	/* where does journal start from on its
+					 * device */
+	__le32 jp_journal_dev;	/* journal device st_rdev */
+	__le32 jp_journal_size;	/* size of the journal */
+	__le32 jp_journal_trans_max;	/* max number of blocks in a transaction. */
+	__le32 jp_journal_magic;	/* random value made on fs creation (this
+					 * was sb_journal_block_count) */
+	__le32 jp_journal_max_batch;	/* max number of blocks to batch into a
+					 * trans */
+	__le32 jp_journal_max_commit_age;	/* in seconds, how old can an async
+						 * commit be */
+	__le32 jp_journal_max_trans_age;	/* in seconds, how old can a transaction
+						 * be */
+};
+
+/* this is the super from 3.5.X, where X >= 10 */
+struct reiserfs_super_block_v1 {
+	__le32 s_block_count;	/* blocks count         */
+	__le32 s_free_blocks;	/* free blocks count    */
+	__le32 s_root_block;	/* root block number    */
+	struct journal_params s_journal;
+	__le16 s_blocksize;	/* block size */
+	__le16 s_oid_maxsize;	/* max size of object id array, see
+				 * get_objectid() commentary  */
+	__le16 s_oid_cursize;	/* current size of object id array */
+	__le16 s_umount_state;	/* this is set to 1 when filesystem was
+				 * umounted, to 2 - when not */
+	char s_magic[10];	/* reiserfs magic string indicates that
+				 * file system is reiserfs:
+				 * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */
+	__le16 s_fs_state;	/* it is set to used by fsck to mark which
+				 * phase of rebuilding is done */
+	__le32 s_hash_function_code;	/* indicate, what hash function is being use
+					 * to sort names in a directory*/
+	__le16 s_tree_height;	/* height of disk tree */
+	__le16 s_bmap_nr;	/* amount of bitmap blocks needed to address
+				 * each block of file system */
+	__le16 s_version;	/* this field is only reliable on filesystem
+				 * with non-standard journal */
+	__le16 s_reserved_for_journal;	/* size in blocks of journal area on main
+					 * device, we need to keep after
+					 * making fs with non-standard journal */
+} __attribute__ ((__packed__));
+
+#define SB_SIZE_V1 (sizeof(struct reiserfs_super_block_v1))
+
+/* this is the on disk super block */
+struct reiserfs_super_block {
+	struct reiserfs_super_block_v1 s_v1;
+	__le32 s_inode_generation;
+	__le32 s_flags;		/* Right now used only by inode-attributes, if enabled */
+	unsigned char s_uuid[16];	/* filesystem unique identifier */
+	unsigned char s_label[16];	/* filesystem volume label */
+	__le16 s_mnt_count;		/* Count of mounts since last fsck */
+	__le16 s_max_mnt_count;		/* Maximum mounts before check */
+	__le32 s_lastcheck;		/* Timestamp of last fsck */
+	__le32 s_check_interval;	/* Interval between checks */
+	char s_unused[76];	/* zero filled by mkreiserfs and
+				 * reiserfs_convert_objectid_map_v1()
+				 * so any additions must be updated
+				 * there as well. */
+} __attribute__ ((__packed__));
+
+#define SB_SIZE (sizeof(struct reiserfs_super_block))
+
+#define REISERFS_VERSION_1 0
+#define REISERFS_VERSION_2 2
+
+// on-disk super block fields converted to cpu form
+#define SB_DISK_SUPER_BLOCK(s) (REISERFS_SB(s)->s_rs)
+#define SB_V1_DISK_SUPER_BLOCK(s) (&(SB_DISK_SUPER_BLOCK(s)->s_v1))
+#define SB_BLOCKSIZE(s) \
+        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_blocksize))
+#define SB_BLOCK_COUNT(s) \
+        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_block_count))
+#define SB_FREE_BLOCKS(s) \
+        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks))
+#define SB_REISERFS_MAGIC(s) \
+        (SB_V1_DISK_SUPER_BLOCK(s)->s_magic)
+#define SB_ROOT_BLOCK(s) \
+        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_root_block))
+#define SB_TREE_HEIGHT(s) \
+        le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height))
+#define SB_REISERFS_STATE(s) \
+        le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state))
+#define SB_VERSION(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_version))
+#define SB_BMAP_NR(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr))
+
+#define PUT_SB_BLOCK_COUNT(s, val) \
+   do { SB_V1_DISK_SUPER_BLOCK(s)->s_block_count = cpu_to_le32(val); } while (0)
+#define PUT_SB_FREE_BLOCKS(s, val) \
+   do { SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks = cpu_to_le32(val); } while (0)
+#define PUT_SB_ROOT_BLOCK(s, val) \
+   do { SB_V1_DISK_SUPER_BLOCK(s)->s_root_block = cpu_to_le32(val); } while (0)
+#define PUT_SB_TREE_HEIGHT(s, val) \
+   do { SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height = cpu_to_le16(val); } while (0)
+#define PUT_SB_REISERFS_STATE(s, val) \
+   do { SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state = cpu_to_le16(val); } while (0)
+#define PUT_SB_VERSION(s, val) \
+   do { SB_V1_DISK_SUPER_BLOCK(s)->s_version = cpu_to_le16(val); } while (0)
+#define PUT_SB_BMAP_NR(s, val) \
+   do { SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr = cpu_to_le16 (val); } while (0)
+
+#define SB_ONDISK_JP(s) (&SB_V1_DISK_SUPER_BLOCK(s)->s_journal)
+#define SB_ONDISK_JOURNAL_SIZE(s) \
+         le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_size))
+#define SB_ONDISK_JOURNAL_1st_BLOCK(s) \
+         le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_1st_block))
+#define SB_ONDISK_JOURNAL_DEVICE(s) \
+         le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_dev))
+#define SB_ONDISK_RESERVED_FOR_JOURNAL(s) \
+         le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_reserved_for_journal))
+
+#define is_block_in_log_or_reserved_area(s, block) \
+         block >= SB_JOURNAL_1st_RESERVED_BLOCK(s) \
+         && block < SB_JOURNAL_1st_RESERVED_BLOCK(s) +  \
+         ((!is_reiserfs_jr(SB_DISK_SUPER_BLOCK(s)) ? \
+         SB_ONDISK_JOURNAL_SIZE(s) + 1 : SB_ONDISK_RESERVED_FOR_JOURNAL(s)))
+
+int is_reiserfs_3_5(struct reiserfs_super_block *rs);
+int is_reiserfs_3_6(struct reiserfs_super_block *rs);
+int is_reiserfs_jr(struct reiserfs_super_block *rs);
+
+/* ReiserFS leaves the first 64k unused, so that partition labels have
+   enough space.  If someone wants to write a fancy bootloader that
+   needs more than 64k, let us know, and this will be increased in size.
+   This number must be larger than than the largest block size on any
+   platform, or code will break.  -Hans */
+#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
+#define REISERFS_FIRST_BLOCK unused_define
+#define REISERFS_JOURNAL_OFFSET_IN_BYTES REISERFS_DISK_OFFSET_IN_BYTES
+
+/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */
+#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024)
+
+/* reiserfs internal error code (used by search_by_key and fix_nodes)) */
+#define CARRY_ON      0
+#define REPEAT_SEARCH -1
+#define IO_ERROR      -2
+#define NO_DISK_SPACE -3
+#define NO_BALANCING_NEEDED  (-4)
+#define NO_MORE_UNUSED_CONTIGUOUS_BLOCKS (-5)
+#define QUOTA_EXCEEDED -6
+
+typedef __u32 b_blocknr_t;
+typedef __le32 unp_t;
+
+struct unfm_nodeinfo {
+	unp_t unfm_nodenum;
+	unsigned short unfm_freespace;
+};
+
+/* there are two formats of keys: 3.5 and 3.6
+ */
+#define KEY_FORMAT_3_5 0
+#define KEY_FORMAT_3_6 1
+
+/* there are two stat datas */
+#define STAT_DATA_V1 0
+#define STAT_DATA_V2 1
+
+static inline struct reiserfs_inode_info *REISERFS_I(const struct inode *inode)
+{
+	return container_of(inode, struct reiserfs_inode_info, vfs_inode);
+}
+
+static inline struct reiserfs_sb_info *REISERFS_SB(const struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
+/* Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16
+ * which overflows on large file systems. */
+static inline __u32 reiserfs_bmap_count(struct super_block *sb)
+{
+	return (SB_BLOCK_COUNT(sb) - 1) / (sb->s_blocksize * 8) + 1;
+}
+
+static inline int bmap_would_wrap(unsigned bmap_nr)
+{
+	return bmap_nr > ((1LL << 16) - 1);
+}
+
+/** this says about version of key of all items (but stat data) the
+    object consists of */
+#define get_inode_item_key_version( inode )                                    \
+    ((REISERFS_I(inode)->i_flags & i_item_key_version_mask) ? KEY_FORMAT_3_6 : KEY_FORMAT_3_5)
+
+#define set_inode_item_key_version( inode, version )                           \
+         ({ if((version)==KEY_FORMAT_3_6)                                      \
+                REISERFS_I(inode)->i_flags |= i_item_key_version_mask;      \
+            else                                                               \
+                REISERFS_I(inode)->i_flags &= ~i_item_key_version_mask; })
+
+#define get_inode_sd_version(inode)                                            \
+    ((REISERFS_I(inode)->i_flags & i_stat_data_version_mask) ? STAT_DATA_V2 : STAT_DATA_V1)
+
+#define set_inode_sd_version(inode, version)                                   \
+         ({ if((version)==STAT_DATA_V2)                                        \
+                REISERFS_I(inode)->i_flags |= i_stat_data_version_mask;     \
+            else                                                               \
+                REISERFS_I(inode)->i_flags &= ~i_stat_data_version_mask; })
+
+/* This is an aggressive tail suppression policy, I am hoping it
+   improves our benchmarks. The principle behind it is that percentage
+   space saving is what matters, not absolute space saving.  This is
+   non-intuitive, but it helps to understand it if you consider that the
+   cost to access 4 blocks is not much more than the cost to access 1
+   block, if you have to do a seek and rotate.  A tail risks a
+   non-linear disk access that is significant as a percentage of total
+   time cost for a 4 block file and saves an amount of space that is
+   less significant as a percentage of space, or so goes the hypothesis.
+   -Hans */
+#define STORE_TAIL_IN_UNFM_S1(n_file_size,n_tail_size,n_block_size) \
+(\
+  (!(n_tail_size)) || \
+  (((n_tail_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) || \
+   ( (n_file_size) >= (n_block_size) * 4 ) || \
+   ( ( (n_file_size) >= (n_block_size) * 3 ) && \
+     ( (n_tail_size) >=   (MAX_DIRECT_ITEM_LEN(n_block_size))/4) ) || \
+   ( ( (n_file_size) >= (n_block_size) * 2 ) && \
+     ( (n_tail_size) >=   (MAX_DIRECT_ITEM_LEN(n_block_size))/2) ) || \
+   ( ( (n_file_size) >= (n_block_size) ) && \
+     ( (n_tail_size) >=   (MAX_DIRECT_ITEM_LEN(n_block_size) * 3)/4) ) ) \
+)
+
+/* Another strategy for tails, this one means only create a tail if all the
+   file would fit into one DIRECT item.
+   Primary intention for this one is to increase performance by decreasing
+   seeking.
+*/
+#define STORE_TAIL_IN_UNFM_S2(n_file_size,n_tail_size,n_block_size) \
+(\
+  (!(n_tail_size)) || \
+  (((n_file_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) ) \
+)
+
+/*
+ * values for s_umount_state field
+ */
+#define REISERFS_VALID_FS    1
+#define REISERFS_ERROR_FS    2
+
+//
+// there are 5 item types currently
+//
+#define TYPE_STAT_DATA 0
+#define TYPE_INDIRECT 1
+#define TYPE_DIRECT 2
+#define TYPE_DIRENTRY 3
+#define TYPE_MAXTYPE 3
+#define TYPE_ANY 15		// FIXME: comment is required
+
+/***************************************************************************/
+/*                       KEY & ITEM HEAD                                   */
+/***************************************************************************/
+
+//
+// directories use this key as well as old files
+//
+struct offset_v1 {
+	__le32 k_offset;
+	__le32 k_uniqueness;
+} __attribute__ ((__packed__));
+
+struct offset_v2 {
+	__le64 v;
+} __attribute__ ((__packed__));
+
+static inline __u16 offset_v2_k_type(const struct offset_v2 *v2)
+{
+	__u8 type = le64_to_cpu(v2->v) >> 60;
+	return (type <= TYPE_MAXTYPE) ? type : TYPE_ANY;
+}
+
+static inline void set_offset_v2_k_type(struct offset_v2 *v2, int type)
+{
+	v2->v =
+	    (v2->v & cpu_to_le64(~0ULL >> 4)) | cpu_to_le64((__u64) type << 60);
+}
+
+static inline loff_t offset_v2_k_offset(const struct offset_v2 *v2)
+{
+	return le64_to_cpu(v2->v) & (~0ULL >> 4);
+}
+
+static inline void set_offset_v2_k_offset(struct offset_v2 *v2, loff_t offset)
+{
+	offset &= (~0ULL >> 4);
+	v2->v = (v2->v & cpu_to_le64(15ULL << 60)) | cpu_to_le64(offset);
+}
+
+/* Key of an item determines its location in the S+tree, and
+   is composed of 4 components */
+struct reiserfs_key {
+	__le32 k_dir_id;	/* packing locality: by default parent
+				   directory object id */
+	__le32 k_objectid;	/* object identifier */
+	union {
+		struct offset_v1 k_offset_v1;
+		struct offset_v2 k_offset_v2;
+	} __attribute__ ((__packed__)) u;
+} __attribute__ ((__packed__));
+
+struct in_core_key {
+	__u32 k_dir_id;		/* packing locality: by default parent
+				   directory object id */
+	__u32 k_objectid;	/* object identifier */
+	__u64 k_offset;
+	__u8 k_type;
+};
+
+struct cpu_key {
+	struct in_core_key on_disk_key;
+	int version;
+	int key_length;		/* 3 in all cases but direct2indirect and
+				   indirect2direct conversion */
+};
+
+/* Our function for comparing keys can compare keys of different
+   lengths.  It takes as a parameter the length of the keys it is to
+   compare.  These defines are used in determining what is to be passed
+   to it as that parameter. */
+#define REISERFS_FULL_KEY_LEN     4
+#define REISERFS_SHORT_KEY_LEN    2
+
+/* The result of the key compare */
+#define FIRST_GREATER 1
+#define SECOND_GREATER -1
+#define KEYS_IDENTICAL 0
+#define KEY_FOUND 1
+#define KEY_NOT_FOUND 0
+
+#define KEY_SIZE (sizeof(struct reiserfs_key))
+#define SHORT_KEY_SIZE (sizeof (__u32) + sizeof (__u32))
+
+/* return values for search_by_key and clones */
+#define ITEM_FOUND 1
+#define ITEM_NOT_FOUND 0
+#define ENTRY_FOUND 1
+#define ENTRY_NOT_FOUND 0
+#define DIRECTORY_NOT_FOUND -1
+#define REGULAR_FILE_FOUND -2
+#define DIRECTORY_FOUND -3
+#define BYTE_FOUND 1
+#define BYTE_NOT_FOUND 0
+#define FILE_NOT_FOUND -1
+
+#define POSITION_FOUND 1
+#define POSITION_NOT_FOUND 0
+
+// return values for reiserfs_find_entry and search_by_entry_key
+#define NAME_FOUND 1
+#define NAME_NOT_FOUND 0
+#define GOTO_PREVIOUS_ITEM 2
+#define NAME_FOUND_INVISIBLE 3
+
+/*  Everything in the filesystem is stored as a set of items.  The
+    item head contains the key of the item, its free space (for
+    indirect items) and specifies the location of the item itself
+    within the block.  */
+
+struct item_head {
+	/* Everything in the tree is found by searching for it based on
+	 * its key.*/
+	struct reiserfs_key ih_key;
+	union {
+		/* The free space in the last unformatted node of an
+		   indirect item if this is an indirect item.  This
+		   equals 0xFFFF iff this is a direct item or stat data
+		   item. Note that the key, not this field, is used to
+		   determine the item type, and thus which field this
+		   union contains. */
+		__le16 ih_free_space_reserved;
+		/* Iff this is a directory item, this field equals the
+		   number of directory entries in the directory item. */
+		__le16 ih_entry_count;
+	} __attribute__ ((__packed__)) u;
+	__le16 ih_item_len;	/* total size of the item body */
+	__le16 ih_item_location;	/* an offset to the item body
+					 * within the block */
+	__le16 ih_version;	/* 0 for all old items, 2 for new
+				   ones. Highest bit is set by fsck
+				   temporary, cleaned after all
+				   done */
+} __attribute__ ((__packed__));
+/* size of item header     */
+#define IH_SIZE (sizeof(struct item_head))
+
+#define ih_free_space(ih)            le16_to_cpu((ih)->u.ih_free_space_reserved)
+#define ih_version(ih)               le16_to_cpu((ih)->ih_version)
+#define ih_entry_count(ih)           le16_to_cpu((ih)->u.ih_entry_count)
+#define ih_location(ih)              le16_to_cpu((ih)->ih_item_location)
+#define ih_item_len(ih)              le16_to_cpu((ih)->ih_item_len)
+
+#define put_ih_free_space(ih, val)   do { (ih)->u.ih_free_space_reserved = cpu_to_le16(val); } while(0)
+#define put_ih_version(ih, val)      do { (ih)->ih_version = cpu_to_le16(val); } while (0)
+#define put_ih_entry_count(ih, val)  do { (ih)->u.ih_entry_count = cpu_to_le16(val); } while (0)
+#define put_ih_location(ih, val)     do { (ih)->ih_item_location = cpu_to_le16(val); } while (0)
+#define put_ih_item_len(ih, val)     do { (ih)->ih_item_len = cpu_to_le16(val); } while (0)
+
+#define unreachable_item(ih) (ih_version(ih) & (1 << 15))
+
+#define get_ih_free_space(ih) (ih_version (ih) == KEY_FORMAT_3_6 ? 0 : ih_free_space (ih))
+#define set_ih_free_space(ih,val) put_ih_free_space((ih), ((ih_version(ih) == KEY_FORMAT_3_6) ? 0 : (val)))
+
+/* these operate on indirect items, where you've got an array of ints
+** at a possibly unaligned location.  These are a noop on ia32
+** 
+** p is the array of __u32, i is the index into the array, v is the value
+** to store there.
+*/
+#define get_block_num(p, i) get_unaligned_le32((p) + (i))
+#define put_block_num(p, i, v) put_unaligned_le32((v), (p) + (i))
+
+//
+// in old version uniqueness field shows key type
+//
+#define V1_SD_UNIQUENESS 0
+#define V1_INDIRECT_UNIQUENESS 0xfffffffe
+#define V1_DIRECT_UNIQUENESS 0xffffffff
+#define V1_DIRENTRY_UNIQUENESS 500
+#define V1_ANY_UNIQUENESS 555	// FIXME: comment is required
+
+//
+// here are conversion routines
+//
+static inline int uniqueness2type(__u32 uniqueness) CONSTF;
+static inline int uniqueness2type(__u32 uniqueness)
+{
+	switch ((int)uniqueness) {
+	case V1_SD_UNIQUENESS:
+		return TYPE_STAT_DATA;
+	case V1_INDIRECT_UNIQUENESS:
+		return TYPE_INDIRECT;
+	case V1_DIRECT_UNIQUENESS:
+		return TYPE_DIRECT;
+	case V1_DIRENTRY_UNIQUENESS:
+		return TYPE_DIRENTRY;
+	case V1_ANY_UNIQUENESS:
+	default:
+		return TYPE_ANY;
+	}
+}
+
+static inline __u32 type2uniqueness(int type) CONSTF;
+static inline __u32 type2uniqueness(int type)
+{
+	switch (type) {
+	case TYPE_STAT_DATA:
+		return V1_SD_UNIQUENESS;
+	case TYPE_INDIRECT:
+		return V1_INDIRECT_UNIQUENESS;
+	case TYPE_DIRECT:
+		return V1_DIRECT_UNIQUENESS;
+	case TYPE_DIRENTRY:
+		return V1_DIRENTRY_UNIQUENESS;
+	case TYPE_ANY:
+	default:
+		return V1_ANY_UNIQUENESS;
+	}
+}
+
+//
+// key is pointer to on disk key which is stored in le, result is cpu,
+// there is no way to get version of object from key, so, provide
+// version to these defines
+//
+static inline loff_t le_key_k_offset(int version,
+				     const struct reiserfs_key *key)
+{
+	return (version == KEY_FORMAT_3_5) ?
+	    le32_to_cpu(key->u.k_offset_v1.k_offset) :
+	    offset_v2_k_offset(&(key->u.k_offset_v2));
+}
+
+static inline loff_t le_ih_k_offset(const struct item_head *ih)
+{
+	return le_key_k_offset(ih_version(ih), &(ih->ih_key));
+}
+
+static inline loff_t le_key_k_type(int version, const struct reiserfs_key *key)
+{
+	return (version == KEY_FORMAT_3_5) ?
+	    uniqueness2type(le32_to_cpu(key->u.k_offset_v1.k_uniqueness)) :
+	    offset_v2_k_type(&(key->u.k_offset_v2));
+}
+
+static inline loff_t le_ih_k_type(const struct item_head *ih)
+{
+	return le_key_k_type(ih_version(ih), &(ih->ih_key));
+}
+
+static inline void set_le_key_k_offset(int version, struct reiserfs_key *key,
+				       loff_t offset)
+{
+	(version == KEY_FORMAT_3_5) ? (void)(key->u.k_offset_v1.k_offset = cpu_to_le32(offset)) :	/* jdm check */
+	    (void)(set_offset_v2_k_offset(&(key->u.k_offset_v2), offset));
+}
+
+static inline void set_le_ih_k_offset(struct item_head *ih, loff_t offset)
+{
+	set_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset);
+}
+
+static inline void set_le_key_k_type(int version, struct reiserfs_key *key,
+				     int type)
+{
+	(version == KEY_FORMAT_3_5) ?
+	    (void)(key->u.k_offset_v1.k_uniqueness =
+		   cpu_to_le32(type2uniqueness(type)))
+	    : (void)(set_offset_v2_k_type(&(key->u.k_offset_v2), type));
+}
+
+static inline void set_le_ih_k_type(struct item_head *ih, int type)
+{
+	set_le_key_k_type(ih_version(ih), &(ih->ih_key), type);
+}
+
+static inline int is_direntry_le_key(int version, struct reiserfs_key *key)
+{
+	return le_key_k_type(version, key) == TYPE_DIRENTRY;
+}
+
+static inline int is_direct_le_key(int version, struct reiserfs_key *key)
+{
+	return le_key_k_type(version, key) == TYPE_DIRECT;
+}
+
+static inline int is_indirect_le_key(int version, struct reiserfs_key *key)
+{
+	return le_key_k_type(version, key) == TYPE_INDIRECT;
+}
+
+static inline int is_statdata_le_key(int version, struct reiserfs_key *key)
+{
+	return le_key_k_type(version, key) == TYPE_STAT_DATA;
+}
+
+//
+// item header has version.
+//
+static inline int is_direntry_le_ih(struct item_head *ih)
+{
+	return is_direntry_le_key(ih_version(ih), &ih->ih_key);
+}
+
+static inline int is_direct_le_ih(struct item_head *ih)
+{
+	return is_direct_le_key(ih_version(ih), &ih->ih_key);
+}
+
+static inline int is_indirect_le_ih(struct item_head *ih)
+{
+	return is_indirect_le_key(ih_version(ih), &ih->ih_key);
+}
+
+static inline int is_statdata_le_ih(struct item_head *ih)
+{
+	return is_statdata_le_key(ih_version(ih), &ih->ih_key);
+}
+
+//
+// key is pointer to cpu key, result is cpu
+//
+static inline loff_t cpu_key_k_offset(const struct cpu_key *key)
+{
+	return key->on_disk_key.k_offset;
+}
+
+static inline loff_t cpu_key_k_type(const struct cpu_key *key)
+{
+	return key->on_disk_key.k_type;
+}
+
+static inline void set_cpu_key_k_offset(struct cpu_key *key, loff_t offset)
+{
+	key->on_disk_key.k_offset = offset;
+}
+
+static inline void set_cpu_key_k_type(struct cpu_key *key, int type)
+{
+	key->on_disk_key.k_type = type;
+}
+
+static inline void cpu_key_k_offset_dec(struct cpu_key *key)
+{
+	key->on_disk_key.k_offset--;
+}
+
+#define is_direntry_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRENTRY)
+#define is_direct_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRECT)
+#define is_indirect_cpu_key(key) (cpu_key_k_type (key) == TYPE_INDIRECT)
+#define is_statdata_cpu_key(key) (cpu_key_k_type (key) == TYPE_STAT_DATA)
+
+/* are these used ? */
+#define is_direntry_cpu_ih(ih) (is_direntry_cpu_key (&((ih)->ih_key)))
+#define is_direct_cpu_ih(ih) (is_direct_cpu_key (&((ih)->ih_key)))
+#define is_indirect_cpu_ih(ih) (is_indirect_cpu_key (&((ih)->ih_key)))
+#define is_statdata_cpu_ih(ih) (is_statdata_cpu_key (&((ih)->ih_key)))
+
+#define I_K_KEY_IN_ITEM(ih, key, n_blocksize) \
+    (!COMP_SHORT_KEYS(ih, key) && \
+	  I_OFF_BYTE_IN_ITEM(ih, k_offset(key), n_blocksize))
+
+/* maximal length of item */
+#define MAX_ITEM_LEN(block_size) (block_size - BLKH_SIZE - IH_SIZE)
+#define MIN_ITEM_LEN 1
+
+/* object identifier for root dir */
+#define REISERFS_ROOT_OBJECTID 2
+#define REISERFS_ROOT_PARENT_OBJECTID 1
+
+extern struct reiserfs_key root_key;
+
+/* 
+ * Picture represents a leaf of the S+tree
+ *  ______________________________________________________
+ * |      |  Array of     |                   |           |
+ * |Block |  Object-Item  |      F r e e      |  Objects- |
+ * | head |  Headers      |     S p a c e     |   Items   |
+ * |______|_______________|___________________|___________|
+ */
+
+/* Header of a disk block.  More precisely, header of a formatted leaf
+   or internal node, and not the header of an unformatted node. */
+struct block_head {
+	__le16 blk_level;	/* Level of a block in the tree. */
+	__le16 blk_nr_item;	/* Number of keys/items in a block. */
+	__le16 blk_free_space;	/* Block free space in bytes. */
+	__le16 blk_reserved;
+	/* dump this in v4/planA */
+	struct reiserfs_key blk_right_delim_key;	/* kept only for compatibility */
+};
+
+#define BLKH_SIZE                     (sizeof(struct block_head))
+#define blkh_level(p_blkh)            (le16_to_cpu((p_blkh)->blk_level))
+#define blkh_nr_item(p_blkh)          (le16_to_cpu((p_blkh)->blk_nr_item))
+#define blkh_free_space(p_blkh)       (le16_to_cpu((p_blkh)->blk_free_space))
+#define blkh_reserved(p_blkh)         (le16_to_cpu((p_blkh)->blk_reserved))
+#define set_blkh_level(p_blkh,val)    ((p_blkh)->blk_level = cpu_to_le16(val))
+#define set_blkh_nr_item(p_blkh,val)  ((p_blkh)->blk_nr_item = cpu_to_le16(val))
+#define set_blkh_free_space(p_blkh,val) ((p_blkh)->blk_free_space = cpu_to_le16(val))
+#define set_blkh_reserved(p_blkh,val) ((p_blkh)->blk_reserved = cpu_to_le16(val))
+#define blkh_right_delim_key(p_blkh)  ((p_blkh)->blk_right_delim_key)
+#define set_blkh_right_delim_key(p_blkh,val)  ((p_blkh)->blk_right_delim_key = val)
+
+/*
+ * values for blk_level field of the struct block_head
+ */
+
+#define FREE_LEVEL 0		/* when node gets removed from the tree its
+				   blk_level is set to FREE_LEVEL. It is then
+				   used to see whether the node is still in the
+				   tree */
+
+#define DISK_LEAF_NODE_LEVEL  1	/* Leaf node level. */
+
+/* Given the buffer head of a formatted node, resolve to the block head of that node. */
+#define B_BLK_HEAD(bh)			((struct block_head *)((bh)->b_data))
+/* Number of items that are in buffer. */
+#define B_NR_ITEMS(bh)			(blkh_nr_item(B_BLK_HEAD(bh)))
+#define B_LEVEL(bh)			(blkh_level(B_BLK_HEAD(bh)))
+#define B_FREE_SPACE(bh)		(blkh_free_space(B_BLK_HEAD(bh)))
+
+#define PUT_B_NR_ITEMS(bh, val)		do { set_blkh_nr_item(B_BLK_HEAD(bh), val); } while (0)
+#define PUT_B_LEVEL(bh, val)		do { set_blkh_level(B_BLK_HEAD(bh), val); } while (0)
+#define PUT_B_FREE_SPACE(bh, val)	do { set_blkh_free_space(B_BLK_HEAD(bh), val); } while (0)
+
+/* Get right delimiting key. -- little endian */
+#define B_PRIGHT_DELIM_KEY(bh)		(&(blk_right_delim_key(B_BLK_HEAD(bh))))
+
+/* Does the buffer contain a disk leaf. */
+#define B_IS_ITEMS_LEVEL(bh)		(B_LEVEL(bh) == DISK_LEAF_NODE_LEVEL)
+
+/* Does the buffer contain a disk internal node */
+#define B_IS_KEYS_LEVEL(bh)      (B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL \
+					    && B_LEVEL(bh) <= MAX_HEIGHT)
+
+/***************************************************************************/
+/*                             STAT DATA                                   */
+/***************************************************************************/
+
+//
+// old stat data is 32 bytes long. We are going to distinguish new one by
+// different size
+//
+struct stat_data_v1 {
+	__le16 sd_mode;		/* file type, permissions */
+	__le16 sd_nlink;	/* number of hard links */
+	__le16 sd_uid;		/* owner */
+	__le16 sd_gid;		/* group */
+	__le32 sd_size;		/* file size */
+	__le32 sd_atime;	/* time of last access */
+	__le32 sd_mtime;	/* time file was last modified  */
+	__le32 sd_ctime;	/* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
+	union {
+		__le32 sd_rdev;
+		__le32 sd_blocks;	/* number of blocks file uses */
+	} __attribute__ ((__packed__)) u;
+	__le32 sd_first_direct_byte;	/* first byte of file which is stored
+					   in a direct item: except that if it
+					   equals 1 it is a symlink and if it
+					   equals ~(__u32)0 there is no
+					   direct item.  The existence of this
+					   field really grates on me. Let's
+					   replace it with a macro based on
+					   sd_size and our tail suppression
+					   policy.  Someday.  -Hans */
+} __attribute__ ((__packed__));
+
+#define SD_V1_SIZE              (sizeof(struct stat_data_v1))
+#define stat_data_v1(ih)        (ih_version (ih) == KEY_FORMAT_3_5)
+#define sd_v1_mode(sdp)         (le16_to_cpu((sdp)->sd_mode))
+#define set_sd_v1_mode(sdp,v)   ((sdp)->sd_mode = cpu_to_le16(v))
+#define sd_v1_nlink(sdp)        (le16_to_cpu((sdp)->sd_nlink))
+#define set_sd_v1_nlink(sdp,v)  ((sdp)->sd_nlink = cpu_to_le16(v))
+#define sd_v1_uid(sdp)          (le16_to_cpu((sdp)->sd_uid))
+#define set_sd_v1_uid(sdp,v)    ((sdp)->sd_uid = cpu_to_le16(v))
+#define sd_v1_gid(sdp)          (le16_to_cpu((sdp)->sd_gid))
+#define set_sd_v1_gid(sdp,v)    ((sdp)->sd_gid = cpu_to_le16(v))
+#define sd_v1_size(sdp)         (le32_to_cpu((sdp)->sd_size))
+#define set_sd_v1_size(sdp,v)   ((sdp)->sd_size = cpu_to_le32(v))
+#define sd_v1_atime(sdp)        (le32_to_cpu((sdp)->sd_atime))
+#define set_sd_v1_atime(sdp,v)  ((sdp)->sd_atime = cpu_to_le32(v))
+#define sd_v1_mtime(sdp)        (le32_to_cpu((sdp)->sd_mtime))
+#define set_sd_v1_mtime(sdp,v)  ((sdp)->sd_mtime = cpu_to_le32(v))
+#define sd_v1_ctime(sdp)        (le32_to_cpu((sdp)->sd_ctime))
+#define set_sd_v1_ctime(sdp,v)  ((sdp)->sd_ctime = cpu_to_le32(v))
+#define sd_v1_rdev(sdp)         (le32_to_cpu((sdp)->u.sd_rdev))
+#define set_sd_v1_rdev(sdp,v)   ((sdp)->u.sd_rdev = cpu_to_le32(v))
+#define sd_v1_blocks(sdp)       (le32_to_cpu((sdp)->u.sd_blocks))
+#define set_sd_v1_blocks(sdp,v) ((sdp)->u.sd_blocks = cpu_to_le32(v))
+#define sd_v1_first_direct_byte(sdp) \
+                                (le32_to_cpu((sdp)->sd_first_direct_byte))
+#define set_sd_v1_first_direct_byte(sdp,v) \
+                                ((sdp)->sd_first_direct_byte = cpu_to_le32(v))
+
+/* inode flags stored in sd_attrs (nee sd_reserved) */
+
+/* we want common flags to have the same values as in ext2,
+   so chattr(1) will work without problems */
+#define REISERFS_IMMUTABLE_FL FS_IMMUTABLE_FL
+#define REISERFS_APPEND_FL    FS_APPEND_FL
+#define REISERFS_SYNC_FL      FS_SYNC_FL
+#define REISERFS_NOATIME_FL   FS_NOATIME_FL
+#define REISERFS_NODUMP_FL    FS_NODUMP_FL
+#define REISERFS_SECRM_FL     FS_SECRM_FL
+#define REISERFS_UNRM_FL      FS_UNRM_FL
+#define REISERFS_COMPR_FL     FS_COMPR_FL
+#define REISERFS_NOTAIL_FL    FS_NOTAIL_FL
+
+/* persistent flags that file inherits from the parent directory */
+#define REISERFS_INHERIT_MASK ( REISERFS_IMMUTABLE_FL |	\
+				REISERFS_SYNC_FL |	\
+				REISERFS_NOATIME_FL |	\
+				REISERFS_NODUMP_FL |	\
+				REISERFS_SECRM_FL |	\
+				REISERFS_COMPR_FL |	\
+				REISERFS_NOTAIL_FL )
+
+/* Stat Data on disk (reiserfs version of UFS disk inode minus the
+   address blocks) */
+struct stat_data {
+	__le16 sd_mode;		/* file type, permissions */
+	__le16 sd_attrs;	/* persistent inode flags */
+	__le32 sd_nlink;	/* number of hard links */
+	__le64 sd_size;		/* file size */
+	__le32 sd_uid;		/* owner */
+	__le32 sd_gid;		/* group */
+	__le32 sd_atime;	/* time of last access */
+	__le32 sd_mtime;	/* time file was last modified  */
+	__le32 sd_ctime;	/* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
+	__le32 sd_blocks;
+	union {
+		__le32 sd_rdev;
+		__le32 sd_generation;
+		//__le32 sd_first_direct_byte;
+		/* first byte of file which is stored in a
+		   direct item: except that if it equals 1
+		   it is a symlink and if it equals
+		   ~(__u32)0 there is no direct item.  The
+		   existence of this field really grates
+		   on me. Let's replace it with a macro
+		   based on sd_size and our tail
+		   suppression policy? */
+	} __attribute__ ((__packed__)) u;
+} __attribute__ ((__packed__));
+//
+// this is 44 bytes long
+//
+#define SD_SIZE (sizeof(struct stat_data))
+#define SD_V2_SIZE              SD_SIZE
+#define stat_data_v2(ih)        (ih_version (ih) == KEY_FORMAT_3_6)
+#define sd_v2_mode(sdp)         (le16_to_cpu((sdp)->sd_mode))
+#define set_sd_v2_mode(sdp,v)   ((sdp)->sd_mode = cpu_to_le16(v))
+/* sd_reserved */
+/* set_sd_reserved */
+#define sd_v2_nlink(sdp)        (le32_to_cpu((sdp)->sd_nlink))
+#define set_sd_v2_nlink(sdp,v)  ((sdp)->sd_nlink = cpu_to_le32(v))
+#define sd_v2_size(sdp)         (le64_to_cpu((sdp)->sd_size))
+#define set_sd_v2_size(sdp,v)   ((sdp)->sd_size = cpu_to_le64(v))
+#define sd_v2_uid(sdp)          (le32_to_cpu((sdp)->sd_uid))
+#define set_sd_v2_uid(sdp,v)    ((sdp)->sd_uid = cpu_to_le32(v))
+#define sd_v2_gid(sdp)          (le32_to_cpu((sdp)->sd_gid))
+#define set_sd_v2_gid(sdp,v)    ((sdp)->sd_gid = cpu_to_le32(v))
+#define sd_v2_atime(sdp)        (le32_to_cpu((sdp)->sd_atime))
+#define set_sd_v2_atime(sdp,v)  ((sdp)->sd_atime = cpu_to_le32(v))
+#define sd_v2_mtime(sdp)        (le32_to_cpu((sdp)->sd_mtime))
+#define set_sd_v2_mtime(sdp,v)  ((sdp)->sd_mtime = cpu_to_le32(v))
+#define sd_v2_ctime(sdp)        (le32_to_cpu((sdp)->sd_ctime))
+#define set_sd_v2_ctime(sdp,v)  ((sdp)->sd_ctime = cpu_to_le32(v))
+#define sd_v2_blocks(sdp)       (le32_to_cpu((sdp)->sd_blocks))
+#define set_sd_v2_blocks(sdp,v) ((sdp)->sd_blocks = cpu_to_le32(v))
+#define sd_v2_rdev(sdp)         (le32_to_cpu((sdp)->u.sd_rdev))
+#define set_sd_v2_rdev(sdp,v)   ((sdp)->u.sd_rdev = cpu_to_le32(v))
+#define sd_v2_generation(sdp)   (le32_to_cpu((sdp)->u.sd_generation))
+#define set_sd_v2_generation(sdp,v) ((sdp)->u.sd_generation = cpu_to_le32(v))
+#define sd_v2_attrs(sdp)         (le16_to_cpu((sdp)->sd_attrs))
+#define set_sd_v2_attrs(sdp,v)   ((sdp)->sd_attrs = cpu_to_le16(v))
+
+/***************************************************************************/
+/*                      DIRECTORY STRUCTURE                                */
+/***************************************************************************/
+/* 
+   Picture represents the structure of directory items
+   ________________________________________________
+   |  Array of     |   |     |        |       |   |
+   | directory     |N-1| N-2 | ....   |   1st |0th|
+   | entry headers |   |     |        |       |   |
+   |_______________|___|_____|________|_______|___|
+                    <----   directory entries         ------>
+
+ First directory item has k_offset component 1. We store "." and ".."
+ in one item, always, we never split "." and ".." into differing
+ items.  This makes, among other things, the code for removing
+ directories simpler. */
+#define SD_OFFSET  0
+#define SD_UNIQUENESS 0
+#define DOT_OFFSET 1
+#define DOT_DOT_OFFSET 2
+#define DIRENTRY_UNIQUENESS 500
+
+/* */
+#define FIRST_ITEM_OFFSET 1
+
+/*
+   Q: How to get key of object pointed to by entry from entry?  
+
+   A: Each directory entry has its header. This header has deh_dir_id and deh_objectid fields, those are key
+      of object, entry points to */
+
+/* NOT IMPLEMENTED:   
+   Directory will someday contain stat data of object */
+
+struct reiserfs_de_head {
+	__le32 deh_offset;	/* third component of the directory entry key */
+	__le32 deh_dir_id;	/* objectid of the parent directory of the object, that is referenced
+				   by directory entry */
+	__le32 deh_objectid;	/* objectid of the object, that is referenced by directory entry */
+	__le16 deh_location;	/* offset of name in the whole item */
+	__le16 deh_state;	/* whether 1) entry contains stat data (for future), and 2) whether
+				   entry is hidden (unlinked) */
+} __attribute__ ((__packed__));
+#define DEH_SIZE                  sizeof(struct reiserfs_de_head)
+#define deh_offset(p_deh)         (le32_to_cpu((p_deh)->deh_offset))
+#define deh_dir_id(p_deh)         (le32_to_cpu((p_deh)->deh_dir_id))
+#define deh_objectid(p_deh)       (le32_to_cpu((p_deh)->deh_objectid))
+#define deh_location(p_deh)       (le16_to_cpu((p_deh)->deh_location))
+#define deh_state(p_deh)          (le16_to_cpu((p_deh)->deh_state))
+
+#define put_deh_offset(p_deh,v)   ((p_deh)->deh_offset = cpu_to_le32((v)))
+#define put_deh_dir_id(p_deh,v)   ((p_deh)->deh_dir_id = cpu_to_le32((v)))
+#define put_deh_objectid(p_deh,v) ((p_deh)->deh_objectid = cpu_to_le32((v)))
+#define put_deh_location(p_deh,v) ((p_deh)->deh_location = cpu_to_le16((v)))
+#define put_deh_state(p_deh,v)    ((p_deh)->deh_state = cpu_to_le16((v)))
+
+/* empty directory contains two entries "." and ".." and their headers */
+#define EMPTY_DIR_SIZE \
+(DEH_SIZE * 2 + ROUND_UP (strlen (".")) + ROUND_UP (strlen ("..")))
+
+/* old format directories have this size when empty */
+#define EMPTY_DIR_SIZE_V1 (DEH_SIZE * 2 + 3)
+
+#define DEH_Statdata 0		/* not used now */
+#define DEH_Visible 2
+
+/* 64 bit systems (and the S/390) need to be aligned explicitly -jdm */
+#if BITS_PER_LONG == 64 || defined(__s390__) || defined(__hppa__)
+#   define ADDR_UNALIGNED_BITS  (3)
+#endif
+
+/* These are only used to manipulate deh_state.
+ * Because of this, we'll use the ext2_ bit routines,
+ * since they are little endian */
+#ifdef ADDR_UNALIGNED_BITS
+
+#   define aligned_address(addr)           ((void *)((long)(addr) & ~((1UL << ADDR_UNALIGNED_BITS) - 1)))
+#   define unaligned_offset(addr)          (((int)((long)(addr) & ((1 << ADDR_UNALIGNED_BITS) - 1))) << 3)
+
+#   define set_bit_unaligned(nr, addr)	\
+	__test_and_set_bit_le((nr) + unaligned_offset(addr), aligned_address(addr))
+#   define clear_bit_unaligned(nr, addr)	\
+	__test_and_clear_bit_le((nr) + unaligned_offset(addr), aligned_address(addr))
+#   define test_bit_unaligned(nr, addr)	\
+	test_bit_le((nr) + unaligned_offset(addr), aligned_address(addr))
+
+#else
+
+#   define set_bit_unaligned(nr, addr)	__test_and_set_bit_le(nr, addr)
+#   define clear_bit_unaligned(nr, addr)	__test_and_clear_bit_le(nr, addr)
+#   define test_bit_unaligned(nr, addr)	test_bit_le(nr, addr)
+
+#endif
+
+#define mark_de_with_sd(deh)        set_bit_unaligned (DEH_Statdata, &((deh)->deh_state))
+#define mark_de_without_sd(deh)     clear_bit_unaligned (DEH_Statdata, &((deh)->deh_state))
+#define mark_de_visible(deh)	    set_bit_unaligned (DEH_Visible, &((deh)->deh_state))
+#define mark_de_hidden(deh)	    clear_bit_unaligned (DEH_Visible, &((deh)->deh_state))
+
+#define de_with_sd(deh)		    test_bit_unaligned (DEH_Statdata, &((deh)->deh_state))
+#define de_visible(deh)	    	    test_bit_unaligned (DEH_Visible, &((deh)->deh_state))
+#define de_hidden(deh)	    	    !test_bit_unaligned (DEH_Visible, &((deh)->deh_state))
+
+extern void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid,
+				   __le32 par_dirid, __le32 par_objid);
+extern void make_empty_dir_item(char *body, __le32 dirid, __le32 objid,
+				__le32 par_dirid, __le32 par_objid);
+
+/* array of the entry headers */
+ /* get item body */
+#define B_I_PITEM(bh,ih) ( (bh)->b_data + ih_location(ih) )
+#define B_I_DEH(bh,ih) ((struct reiserfs_de_head *)(B_I_PITEM(bh,ih)))
+
+/* length of the directory entry in directory item. This define
+   calculates length of i-th directory entry using directory entry
+   locations from dir entry head. When it calculates length of 0-th
+   directory entry, it uses length of whole item in place of entry
+   location of the non-existent following entry in the calculation.
+   See picture above.*/
+/*
+#define I_DEH_N_ENTRY_LENGTH(ih,deh,i) \
+((i) ? (deh_location((deh)-1) - deh_location((deh))) : (ih_item_len((ih)) - deh_location((deh))))
+*/
+static inline int entry_length(const struct buffer_head *bh,
+			       const struct item_head *ih, int pos_in_item)
+{
+	struct reiserfs_de_head *deh;
+
+	deh = B_I_DEH(bh, ih) + pos_in_item;
+	if (pos_in_item)
+		return deh_location(deh - 1) - deh_location(deh);
+
+	return ih_item_len(ih) - deh_location(deh);
+}
+
+/* number of entries in the directory item, depends on ENTRY_COUNT being at the start of directory dynamic data. */
+#define I_ENTRY_COUNT(ih) (ih_entry_count((ih)))
+
+/* name by bh, ih and entry_num */
+#define B_I_E_NAME(bh,ih,entry_num) ((char *)(bh->b_data + ih_location(ih) + deh_location(B_I_DEH(bh,ih)+(entry_num))))
+
+// two entries per block (at least)
+#define REISERFS_MAX_NAME(block_size) 255
+
+/* this structure is used for operations on directory entries. It is
+   not a disk structure. */
+/* When reiserfs_find_entry or search_by_entry_key find directory
+   entry, they return filled reiserfs_dir_entry structure */
+struct reiserfs_dir_entry {
+	struct buffer_head *de_bh;
+	int de_item_num;
+	struct item_head *de_ih;
+	int de_entry_num;
+	struct reiserfs_de_head *de_deh;
+	int de_entrylen;
+	int de_namelen;
+	char *de_name;
+	unsigned long *de_gen_number_bit_string;
+
+	__u32 de_dir_id;
+	__u32 de_objectid;
+
+	struct cpu_key de_entry_key;
+};
+
+/* these defines are useful when a particular member of a reiserfs_dir_entry is needed */
+
+/* pointer to file name, stored in entry */
+#define B_I_DEH_ENTRY_FILE_NAME(bh,ih,deh) (B_I_PITEM (bh, ih) + deh_location(deh))
+
+/* length of name */
+#define I_DEH_N_ENTRY_FILE_NAME_LENGTH(ih,deh,entry_num) \
+(I_DEH_N_ENTRY_LENGTH (ih, deh, entry_num) - (de_with_sd (deh) ? SD_SIZE : 0))
+
+/* hash value occupies bits from 7 up to 30 */
+#define GET_HASH_VALUE(offset) ((offset) & 0x7fffff80LL)
+/* generation number occupies 7 bits starting from 0 up to 6 */
+#define GET_GENERATION_NUMBER(offset) ((offset) & 0x7fLL)
+#define MAX_GENERATION_NUMBER  127
+
+#define SET_GENERATION_NUMBER(offset,gen_number) (GET_HASH_VALUE(offset)|(gen_number))
+
+/*
+ * Picture represents an internal node of the reiserfs tree
+ *  ______________________________________________________
+ * |      |  Array of     |  Array of         |  Free     |
+ * |block |    keys       |  pointers         | space     |
+ * | head |      N        |      N+1          |           |
+ * |______|_______________|___________________|___________|
+ */
+
+/***************************************************************************/
+/*                      DISK CHILD                                         */
+/***************************************************************************/
+/* Disk child pointer: The pointer from an internal node of the tree
+   to a node that is on disk. */
+struct disk_child {
+	__le32 dc_block_number;	/* Disk child's block number. */
+	__le16 dc_size;		/* Disk child's used space.   */
+	__le16 dc_reserved;
+};
+
+#define DC_SIZE (sizeof(struct disk_child))
+#define dc_block_number(dc_p)	(le32_to_cpu((dc_p)->dc_block_number))
+#define dc_size(dc_p)		(le16_to_cpu((dc_p)->dc_size))
+#define put_dc_block_number(dc_p, val)   do { (dc_p)->dc_block_number = cpu_to_le32(val); } while(0)
+#define put_dc_size(dc_p, val)   do { (dc_p)->dc_size = cpu_to_le16(val); } while(0)
+
+/* Get disk child by buffer header and position in the tree node. */
+#define B_N_CHILD(bh, n_pos)  ((struct disk_child *)\
+((bh)->b_data + BLKH_SIZE + B_NR_ITEMS(bh) * KEY_SIZE + DC_SIZE * (n_pos)))
+
+/* Get disk child number by buffer header and position in the tree node. */
+#define B_N_CHILD_NUM(bh, n_pos) (dc_block_number(B_N_CHILD(bh, n_pos)))
+#define PUT_B_N_CHILD_NUM(bh, n_pos, val) \
+				(put_dc_block_number(B_N_CHILD(bh, n_pos), val))
+
+ /* maximal value of field child_size in structure disk_child */
+ /* child size is the combined size of all items and their headers */
+#define MAX_CHILD_SIZE(bh) ((int)( (bh)->b_size - BLKH_SIZE ))
+
+/* amount of used space in buffer (not including block head) */
+#define B_CHILD_SIZE(cur) (MAX_CHILD_SIZE(cur)-(B_FREE_SPACE(cur)))
+
+/* max and min number of keys in internal node */
+#define MAX_NR_KEY(bh) ( (MAX_CHILD_SIZE(bh)-DC_SIZE)/(KEY_SIZE+DC_SIZE) )
+#define MIN_NR_KEY(bh)    (MAX_NR_KEY(bh)/2)
+
+/***************************************************************************/
+/*                      PATH STRUCTURES AND DEFINES                        */
+/***************************************************************************/
+
+/* Search_by_key fills up the path from the root to the leaf as it descends the tree looking for the
+   key.  It uses reiserfs_bread to try to find buffers in the cache given their block number.  If it
+   does not find them in the cache it reads them from disk.  For each node search_by_key finds using
+   reiserfs_bread it then uses bin_search to look through that node.  bin_search will find the
+   position of the block_number of the next node if it is looking through an internal node.  If it
+   is looking through a leaf node bin_search will find the position of the item which has key either
+   equal to given key, or which is the maximal key less than the given key. */
+
+struct path_element {
+	struct buffer_head *pe_buffer;	/* Pointer to the buffer at the path in the tree. */
+	int pe_position;	/* Position in the tree node which is placed in the */
+	/* buffer above.                                  */
+};
+
+#define MAX_HEIGHT 5		/* maximal height of a tree. don't change this without changing JOURNAL_PER_BALANCE_CNT */
+#define EXTENDED_MAX_HEIGHT         7	/* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */
+#define FIRST_PATH_ELEMENT_OFFSET   2	/* Must be equal to at least 2. */
+
+#define ILLEGAL_PATH_ELEMENT_OFFSET 1	/* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */
+#define MAX_FEB_SIZE 6		/* this MUST be MAX_HEIGHT + 1. See about FEB below */
+
+/* We need to keep track of who the ancestors of nodes are.  When we
+   perform a search we record which nodes were visited while
+   descending the tree looking for the node we searched for. This list
+   of nodes is called the path.  This information is used while
+   performing balancing.  Note that this path information may become
+   invalid, and this means we must check it when using it to see if it
+   is still valid. You'll need to read search_by_key and the comments
+   in it, especially about decrement_counters_in_path(), to understand
+   this structure.  
+
+Paths make the code so much harder to work with and debug.... An
+enormous number of bugs are due to them, and trying to write or modify
+code that uses them just makes my head hurt.  They are based on an
+excessive effort to avoid disturbing the precious VFS code.:-( The
+gods only know how we are going to SMP the code that uses them.
+znodes are the way! */
+
+#define PATH_READA	0x1	/* do read ahead */
+#define PATH_READA_BACK 0x2	/* read backwards */
+
+struct treepath {
+	int path_length;	/* Length of the array above.   */
+	int reada;
+	struct path_element path_elements[EXTENDED_MAX_HEIGHT];	/* Array of the path elements.  */
+	int pos_in_item;
+};
+
+#define pos_in_item(path) ((path)->pos_in_item)
+
+#define INITIALIZE_PATH(var) \
+struct treepath var = {.path_length = ILLEGAL_PATH_ELEMENT_OFFSET, .reada = 0,}
+
+/* Get path element by path and path position. */
+#define PATH_OFFSET_PELEMENT(path, n_offset)  ((path)->path_elements + (n_offset))
+
+/* Get buffer header at the path by path and path position. */
+#define PATH_OFFSET_PBUFFER(path, n_offset)   (PATH_OFFSET_PELEMENT(path, n_offset)->pe_buffer)
+
+/* Get position in the element at the path by path and path position. */
+#define PATH_OFFSET_POSITION(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_position)
+
+#define PATH_PLAST_BUFFER(path) (PATH_OFFSET_PBUFFER((path), (path)->path_length))
+				/* you know, to the person who didn't
+				   write this the macro name does not
+				   at first suggest what it does.
+				   Maybe POSITION_FROM_PATH_END? Or
+				   maybe we should just focus on
+				   dumping paths... -Hans */
+#define PATH_LAST_POSITION(path) (PATH_OFFSET_POSITION((path), (path)->path_length))
+
+#define PATH_PITEM_HEAD(path)    B_N_PITEM_HEAD(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path))
+
+/* in do_balance leaf has h == 0 in contrast with path structure,
+   where root has level == 0. That is why we need these defines */
+#define PATH_H_PBUFFER(path, h) PATH_OFFSET_PBUFFER (path, path->path_length - (h))	/* tb->S[h] */
+#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER (path, (h) + 1)	/* tb->F[h] or tb->S[0]->b_parent */
+#define PATH_H_POSITION(path, h) PATH_OFFSET_POSITION (path, path->path_length - (h))
+#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1)	/* tb->S[h]->b_item_order */
+
+#define PATH_H_PATH_OFFSET(path, n_h) ((path)->path_length - (n_h))
+
+#define get_last_bh(path) PATH_PLAST_BUFFER(path)
+#define get_ih(path) PATH_PITEM_HEAD(path)
+#define get_item_pos(path) PATH_LAST_POSITION(path)
+#define get_item(path) ((void *)B_N_PITEM(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION (path)))
+#define item_moved(ih,path) comp_items(ih, path)
+#define path_changed(ih,path) comp_items (ih, path)
+
+/***************************************************************************/
+/*                       MISC                                              */
+/***************************************************************************/
+
+/* Size of pointer to the unformatted node. */
+#define UNFM_P_SIZE (sizeof(unp_t))
+#define UNFM_P_SHIFT 2
+
+// in in-core inode key is stored on le form
+#define INODE_PKEY(inode) ((struct reiserfs_key *)(REISERFS_I(inode)->i_key))
+
+#define MAX_UL_INT 0xffffffff
+#define MAX_INT    0x7ffffff
+#define MAX_US_INT 0xffff
+
+// reiserfs version 2 has max offset 60 bits. Version 1 - 32 bit offset
+#define U32_MAX (~(__u32)0)
+
+static inline loff_t max_reiserfs_offset(struct inode *inode)
+{
+	if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5)
+		return (loff_t) U32_MAX;
+
+	return (loff_t) ((~(__u64) 0) >> 4);
+}
+
+/*#define MAX_KEY_UNIQUENESS	MAX_UL_INT*/
+#define MAX_KEY_OBJECTID	MAX_UL_INT
+
+#define MAX_B_NUM  MAX_UL_INT
+#define MAX_FC_NUM MAX_US_INT
+
+/* the purpose is to detect overflow of an unsigned short */
+#define REISERFS_LINK_MAX (MAX_US_INT - 1000)
+
+/* The following defines are used in reiserfs_insert_item and reiserfs_append_item  */
+#define REISERFS_KERNEL_MEM		0	/* reiserfs kernel memory mode  */
+#define REISERFS_USER_MEM		1	/* reiserfs user memory mode            */
+
+#define fs_generation(s) (REISERFS_SB(s)->s_generation_counter)
+#define get_generation(s) atomic_read (&fs_generation(s))
+#define FILESYSTEM_CHANGED_TB(tb)  (get_generation((tb)->tb_sb) != (tb)->fs_gen)
+#define __fs_changed(gen,s) (gen != get_generation (s))
+#define fs_changed(gen,s)		\
+({					\
+	reiserfs_cond_resched(s);	\
+	__fs_changed(gen, s);		\
+})
+
+/***************************************************************************/
+/*                  FIXATE NODES                                           */
+/***************************************************************************/
+
+#define VI_TYPE_LEFT_MERGEABLE 1
+#define VI_TYPE_RIGHT_MERGEABLE 2
+
+/* To make any changes in the tree we always first find node, that
+   contains item to be changed/deleted or place to insert a new
+   item. We call this node S. To do balancing we need to decide what
+   we will shift to left/right neighbor, or to a new node, where new
+   item will be etc. To make this analysis simpler we build virtual
+   node. Virtual node is an array of items, that will replace items of
+   node S. (For instance if we are going to delete an item, virtual
+   node does not contain it). Virtual node keeps information about
+   item sizes and types, mergeability of first and last items, sizes
+   of all entries in directory item. We use this array of items when
+   calculating what we can shift to neighbors and how many nodes we
+   have to have if we do not any shiftings, if we shift to left/right
+   neighbor or to both. */
+struct virtual_item {
+	int vi_index;		// index in the array of item operations
+	unsigned short vi_type;	// left/right mergeability
+	unsigned short vi_item_len;	/* length of item that it will have after balancing */
+	struct item_head *vi_ih;
+	const char *vi_item;	// body of item (old or new)
+	const void *vi_new_data;	// 0 always but paste mode
+	void *vi_uarea;		// item specific area
+};
+
+struct virtual_node {
+	char *vn_free_ptr;	/* this is a pointer to the free space in the buffer */
+	unsigned short vn_nr_item;	/* number of items in virtual node */
+	short vn_size;		/* size of node , that node would have if it has unlimited size and no balancing is performed */
+	short vn_mode;		/* mode of balancing (paste, insert, delete, cut) */
+	short vn_affected_item_num;
+	short vn_pos_in_item;
+	struct item_head *vn_ins_ih;	/* item header of inserted item, 0 for other modes */
+	const void *vn_data;
+	struct virtual_item *vn_vi;	/* array of items (including a new one, excluding item to be deleted) */
+};
+
+/* used by directory items when creating virtual nodes */
+struct direntry_uarea {
+	int flags;
+	__u16 entry_count;
+	__u16 entry_sizes[1];
+} __attribute__ ((__packed__));
+
+/***************************************************************************/
+/*                  TREE BALANCE                                           */
+/***************************************************************************/
+
+/* This temporary structure is used in tree balance algorithms, and
+   constructed as we go to the extent that its various parts are
+   needed.  It contains arrays of nodes that can potentially be
+   involved in the balancing of node S, and parameters that define how
+   each of the nodes must be balanced.  Note that in these algorithms
+   for balancing the worst case is to need to balance the current node
+   S and the left and right neighbors and all of their parents plus
+   create a new node.  We implement S1 balancing for the leaf nodes
+   and S0 balancing for the internal nodes (S1 and S0 are defined in
+   our papers.)*/
+
+#define MAX_FREE_BLOCK 7	/* size of the array of buffers to free at end of do_balance */
+
+/* maximum number of FEB blocknrs on a single level */
+#define MAX_AMOUNT_NEEDED 2
+
+/* someday somebody will prefix every field in this struct with tb_ */
+struct tree_balance {
+	int tb_mode;
+	int need_balance_dirty;
+	struct super_block *tb_sb;
+	struct reiserfs_transaction_handle *transaction_handle;
+	struct treepath *tb_path;
+	struct buffer_head *L[MAX_HEIGHT];	/* array of left neighbors of nodes in the path */
+	struct buffer_head *R[MAX_HEIGHT];	/* array of right neighbors of nodes in the path */
+	struct buffer_head *FL[MAX_HEIGHT];	/* array of fathers of the left  neighbors      */
+	struct buffer_head *FR[MAX_HEIGHT];	/* array of fathers of the right neighbors      */
+	struct buffer_head *CFL[MAX_HEIGHT];	/* array of common parents of center node and its left neighbor  */
+	struct buffer_head *CFR[MAX_HEIGHT];	/* array of common parents of center node and its right neighbor */
+
+	struct buffer_head *FEB[MAX_FEB_SIZE];	/* array of empty buffers. Number of buffers in array equals
+						   cur_blknum. */
+	struct buffer_head *used[MAX_FEB_SIZE];
+	struct buffer_head *thrown[MAX_FEB_SIZE];
+	int lnum[MAX_HEIGHT];	/* array of number of items which must be
+				   shifted to the left in order to balance the
+				   current node; for leaves includes item that
+				   will be partially shifted; for internal
+				   nodes, it is the number of child pointers
+				   rather than items. It includes the new item
+				   being created. The code sometimes subtracts
+				   one to get the number of wholly shifted
+				   items for other purposes. */
+	int rnum[MAX_HEIGHT];	/* substitute right for left in comment above */
+	int lkey[MAX_HEIGHT];	/* array indexed by height h mapping the key delimiting L[h] and
+				   S[h] to its item number within the node CFL[h] */
+	int rkey[MAX_HEIGHT];	/* substitute r for l in comment above */
+	int insert_size[MAX_HEIGHT];	/* the number of bytes by we are trying to add or remove from
+					   S[h]. A negative value means removing.  */
+	int blknum[MAX_HEIGHT];	/* number of nodes that will replace node S[h] after
+				   balancing on the level h of the tree.  If 0 then S is
+				   being deleted, if 1 then S is remaining and no new nodes
+				   are being created, if 2 or 3 then 1 or 2 new nodes is
+				   being created */
+
+	/* fields that are used only for balancing leaves of the tree */
+	int cur_blknum;		/* number of empty blocks having been already allocated                 */
+	int s0num;		/* number of items that fall into left most  node when S[0] splits     */
+	int s1num;		/* number of items that fall into first  new node when S[0] splits     */
+	int s2num;		/* number of items that fall into second new node when S[0] splits     */
+	int lbytes;		/* number of bytes which can flow to the left neighbor from the        left    */
+	/* most liquid item that cannot be shifted from S[0] entirely         */
+	/* if -1 then nothing will be partially shifted */
+	int rbytes;		/* number of bytes which will flow to the right neighbor from the right        */
+	/* most liquid item that cannot be shifted from S[0] entirely         */
+	/* if -1 then nothing will be partially shifted                           */
+	int s1bytes;		/* number of bytes which flow to the first  new node when S[0] splits   */
+	/* note: if S[0] splits into 3 nodes, then items do not need to be cut  */
+	int s2bytes;
+	struct buffer_head *buf_to_free[MAX_FREE_BLOCK];	/* buffers which are to be freed after do_balance finishes by unfix_nodes */
+	char *vn_buf;		/* kmalloced memory. Used to create
+				   virtual node and keep map of
+				   dirtied bitmap blocks */
+	int vn_buf_size;	/* size of the vn_buf */
+	struct virtual_node *tb_vn;	/* VN starts after bitmap of bitmap blocks */
+
+	int fs_gen;		/* saved value of `reiserfs_generation' counter
+				   see FILESYSTEM_CHANGED() macro in reiserfs_fs.h */
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	struct in_core_key key;	/* key pointer, to pass to block allocator or
+				   another low-level subsystem */
+#endif
+};
+
+/* These are modes of balancing */
+
+/* When inserting an item. */
+#define M_INSERT	'i'
+/* When inserting into (directories only) or appending onto an already
+   existent item. */
+#define M_PASTE		'p'
+/* When deleting an item. */
+#define M_DELETE	'd'
+/* When truncating an item or removing an entry from a (directory) item. */
+#define M_CUT 		'c'
+
+/* used when balancing on leaf level skipped (in reiserfsck) */
+#define M_INTERNAL	'n'
+
+/* When further balancing is not needed, then do_balance does not need
+   to be called. */
+#define M_SKIP_BALANCING 		's'
+#define M_CONVERT	'v'
+
+/* modes of leaf_move_items */
+#define LEAF_FROM_S_TO_L 0
+#define LEAF_FROM_S_TO_R 1
+#define LEAF_FROM_R_TO_L 2
+#define LEAF_FROM_L_TO_R 3
+#define LEAF_FROM_S_TO_SNEW 4
+
+#define FIRST_TO_LAST 0
+#define LAST_TO_FIRST 1
+
+/* used in do_balance for passing parent of node information that has
+   been gotten from tb struct */
+struct buffer_info {
+	struct tree_balance *tb;
+	struct buffer_head *bi_bh;
+	struct buffer_head *bi_parent;
+	int bi_position;
+};
+
+static inline struct super_block *sb_from_tb(struct tree_balance *tb)
+{
+	return tb ? tb->tb_sb : NULL;
+}
+
+static inline struct super_block *sb_from_bi(struct buffer_info *bi)
+{
+	return bi ? sb_from_tb(bi->tb) : NULL;
+}
+
+/* there are 4 types of items: stat data, directory item, indirect, direct.
++-------------------+------------+--------------+------------+
+|	            |  k_offset  | k_uniqueness | mergeable? |
++-------------------+------------+--------------+------------+
+|     stat data     |	0        |      0       |   no       |
++-------------------+------------+--------------+------------+
+| 1st directory item| DOT_OFFSET |DIRENTRY_UNIQUENESS|   no       | 
+| non 1st directory | hash value |              |   yes      |
+|     item          |            |              |            |
++-------------------+------------+--------------+------------+
+| indirect item     | offset + 1 |TYPE_INDIRECT |   if this is not the first indirect item of the object
++-------------------+------------+--------------+------------+
+| direct item       | offset + 1 |TYPE_DIRECT   | if not this is not the first direct item of the object
++-------------------+------------+--------------+------------+
+*/
+
+struct item_operations {
+	int (*bytes_number) (struct item_head * ih, int block_size);
+	void (*decrement_key) (struct cpu_key *);
+	int (*is_left_mergeable) (struct reiserfs_key * ih,
+				  unsigned long bsize);
+	void (*print_item) (struct item_head *, char *item);
+	void (*check_item) (struct item_head *, char *item);
+
+	int (*create_vi) (struct virtual_node * vn, struct virtual_item * vi,
+			  int is_affected, int insert_size);
+	int (*check_left) (struct virtual_item * vi, int free,
+			   int start_skip, int end_skip);
+	int (*check_right) (struct virtual_item * vi, int free);
+	int (*part_size) (struct virtual_item * vi, int from, int to);
+	int (*unit_num) (struct virtual_item * vi);
+	void (*print_vi) (struct virtual_item * vi);
+};
+
+extern struct item_operations *item_ops[TYPE_ANY + 1];
+
+#define op_bytes_number(ih,bsize)                    item_ops[le_ih_k_type (ih)]->bytes_number (ih, bsize)
+#define op_is_left_mergeable(key,bsize)              item_ops[le_key_k_type (le_key_version (key), key)]->is_left_mergeable (key, bsize)
+#define op_print_item(ih,item)                       item_ops[le_ih_k_type (ih)]->print_item (ih, item)
+#define op_check_item(ih,item)                       item_ops[le_ih_k_type (ih)]->check_item (ih, item)
+#define op_create_vi(vn,vi,is_affected,insert_size)  item_ops[le_ih_k_type ((vi)->vi_ih)]->create_vi (vn,vi,is_affected,insert_size)
+#define op_check_left(vi,free,start_skip,end_skip) item_ops[(vi)->vi_index]->check_left (vi, free, start_skip, end_skip)
+#define op_check_right(vi,free)                      item_ops[(vi)->vi_index]->check_right (vi, free)
+#define op_part_size(vi,from,to)                     item_ops[(vi)->vi_index]->part_size (vi, from, to)
+#define op_unit_num(vi)				     item_ops[(vi)->vi_index]->unit_num (vi)
+#define op_print_vi(vi)                              item_ops[(vi)->vi_index]->print_vi (vi)
+
+#define COMP_SHORT_KEYS comp_short_keys
+
+/* number of blocks pointed to by the indirect item */
+#define I_UNFM_NUM(ih)	(ih_item_len(ih) / UNFM_P_SIZE)
+
+/* the used space within the unformatted node corresponding to pos within the item pointed to by ih */
+#define I_POS_UNFM_SIZE(ih,pos,size) (((pos) == I_UNFM_NUM(ih) - 1 ) ? (size) - ih_free_space(ih) : (size))
+
+/* number of bytes contained by the direct item or the unformatted nodes the indirect item points to */
+
+/* get the item header */
+#define B_N_PITEM_HEAD(bh,item_num) ( (struct item_head * )((bh)->b_data + BLKH_SIZE) + (item_num) )
+
+/* get key */
+#define B_N_PDELIM_KEY(bh,item_num) ( (struct reiserfs_key * )((bh)->b_data + BLKH_SIZE) + (item_num) )
+
+/* get the key */
+#define B_N_PKEY(bh,item_num) ( &(B_N_PITEM_HEAD(bh,item_num)->ih_key) )
+
+/* get item body */
+#define B_N_PITEM(bh,item_num) ( (bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(item_num))))
+
+/* get the stat data by the buffer header and the item order */
+#define B_N_STAT_DATA(bh,nr) \
+( (struct stat_data *)((bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(nr))) ) )
+
+    /* following defines use reiserfs buffer header and item header */
+
+/* get stat-data */
+#define B_I_STAT_DATA(bh, ih) ( (struct stat_data * )((bh)->b_data + ih_location(ih)) )
+
+// this is 3976 for size==4096
+#define MAX_DIRECT_ITEM_LEN(size) ((size) - BLKH_SIZE - 2*IH_SIZE - SD_SIZE - UNFM_P_SIZE)
+
+/* indirect items consist of entries which contain blocknrs, pos
+   indicates which entry, and B_I_POS_UNFM_POINTER resolves to the
+   blocknr contained by the entry pos points to */
+#define B_I_POS_UNFM_POINTER(bh,ih,pos) le32_to_cpu(*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)))
+#define PUT_B_I_POS_UNFM_POINTER(bh,ih,pos, val) do {*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)) = cpu_to_le32(val); } while (0)
+
+struct reiserfs_iget_args {
+	__u32 objectid;
+	__u32 dirid;
+};
+
+/***************************************************************************/
+/*                    FUNCTION DECLARATIONS                                */
+/***************************************************************************/
+
+#define get_journal_desc_magic(bh) (bh->b_data + bh->b_size - 12)
+
+#define journal_trans_half(blocksize) \
+	((blocksize - sizeof (struct reiserfs_journal_desc) + sizeof (__u32) - 12) / sizeof (__u32))
+
+/* journal.c see journal.c for all the comments here */
+
+/* first block written in a commit.  */
+struct reiserfs_journal_desc {
+	__le32 j_trans_id;	/* id of commit */
+	__le32 j_len;		/* length of commit. len +1 is the commit block */
+	__le32 j_mount_id;	/* mount id of this trans */
+	__le32 j_realblock[1];	/* real locations for each block */
+};
+
+#define get_desc_trans_id(d)   le32_to_cpu((d)->j_trans_id)
+#define get_desc_trans_len(d)  le32_to_cpu((d)->j_len)
+#define get_desc_mount_id(d)   le32_to_cpu((d)->j_mount_id)
+
+#define set_desc_trans_id(d,val)       do { (d)->j_trans_id = cpu_to_le32 (val); } while (0)
+#define set_desc_trans_len(d,val)      do { (d)->j_len = cpu_to_le32 (val); } while (0)
+#define set_desc_mount_id(d,val)       do { (d)->j_mount_id = cpu_to_le32 (val); } while (0)
+
+/* last block written in a commit */
+struct reiserfs_journal_commit {
+	__le32 j_trans_id;	/* must match j_trans_id from the desc block */
+	__le32 j_len;		/* ditto */
+	__le32 j_realblock[1];	/* real locations for each block */
+};
+
+#define get_commit_trans_id(c) le32_to_cpu((c)->j_trans_id)
+#define get_commit_trans_len(c)        le32_to_cpu((c)->j_len)
+#define get_commit_mount_id(c) le32_to_cpu((c)->j_mount_id)
+
+#define set_commit_trans_id(c,val)     do { (c)->j_trans_id = cpu_to_le32 (val); } while (0)
+#define set_commit_trans_len(c,val)    do { (c)->j_len = cpu_to_le32 (val); } while (0)
+
+/* this header block gets written whenever a transaction is considered fully flushed, and is more recent than the
+** last fully flushed transaction.  fully flushed means all the log blocks and all the real blocks are on disk,
+** and this transaction does not need to be replayed.
+*/
+struct reiserfs_journal_header {
+	__le32 j_last_flush_trans_id;	/* id of last fully flushed transaction */
+	__le32 j_first_unflushed_offset;	/* offset in the log of where to start replay after a crash */
+	__le32 j_mount_id;
+	/* 12 */ struct journal_params jh_journal;
+};
+
+/* biggest tunable defines are right here */
+#define JOURNAL_BLOCK_COUNT 8192	/* number of blocks in the journal */
+#define JOURNAL_TRANS_MAX_DEFAULT 1024	/* biggest possible single transaction, don't change for now (8/3/99) */
+#define JOURNAL_TRANS_MIN_DEFAULT 256
+#define JOURNAL_MAX_BATCH_DEFAULT   900	/* max blocks to batch into one transaction, don't make this any bigger than 900 */
+#define JOURNAL_MIN_RATIO 2
+#define JOURNAL_MAX_COMMIT_AGE 30
+#define JOURNAL_MAX_TRANS_AGE 30
+#define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9)
+#define JOURNAL_BLOCKS_PER_OBJECT(sb)  (JOURNAL_PER_BALANCE_CNT * 3 + \
+					 2 * (REISERFS_QUOTA_INIT_BLOCKS(sb) + \
+					      REISERFS_QUOTA_TRANS_BLOCKS(sb)))
+
+#ifdef CONFIG_QUOTA
+#define REISERFS_QUOTA_OPTS ((1 << REISERFS_USRQUOTA) | (1 << REISERFS_GRPQUOTA))
+/* We need to update data and inode (atime) */
+#define REISERFS_QUOTA_TRANS_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? 2 : 0)
+/* 1 balancing, 1 bitmap, 1 data per write + stat data update */
+#define REISERFS_QUOTA_INIT_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \
+(DQUOT_INIT_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_INIT_REWRITE+1) : 0)
+/* same as with INIT */
+#define REISERFS_QUOTA_DEL_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \
+(DQUOT_DEL_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_DEL_REWRITE+1) : 0)
+#else
+#define REISERFS_QUOTA_TRANS_BLOCKS(s) 0
+#define REISERFS_QUOTA_INIT_BLOCKS(s) 0
+#define REISERFS_QUOTA_DEL_BLOCKS(s) 0
+#endif
+
+/* both of these can be as low as 1, or as high as you want.  The min is the
+** number of 4k bitmap nodes preallocated on mount. New nodes are allocated
+** as needed, and released when transactions are committed.  On release, if 
+** the current number of nodes is > max, the node is freed, otherwise, 
+** it is put on a free list for faster use later.
+*/
+#define REISERFS_MIN_BITMAP_NODES 10
+#define REISERFS_MAX_BITMAP_NODES 100
+
+#define JBH_HASH_SHIFT 13	/* these are based on journal hash size of 8192 */
+#define JBH_HASH_MASK 8191
+
+#define _jhashfn(sb,block)	\
+	(((unsigned long)sb>>L1_CACHE_SHIFT) ^ \
+	 (((block)<<(JBH_HASH_SHIFT - 6)) ^ ((block) >> 13) ^ ((block) << (JBH_HASH_SHIFT - 12))))
+#define journal_hash(t,sb,block) ((t)[_jhashfn((sb),(block)) & JBH_HASH_MASK])
+
+// We need these to make journal.c code more readable
+#define journal_find_get_block(s, block) __find_get_block(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
+#define journal_getblk(s, block) __getblk(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
+#define journal_bread(s, block) __bread(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
+
+enum reiserfs_bh_state_bits {
+	BH_JDirty = BH_PrivateStart,	/* buffer is in current transaction */
+	BH_JDirty_wait,
+	BH_JNew,		/* disk block was taken off free list before
+				 * being in a finished transaction, or
+				 * written to disk. Can be reused immed. */
+	BH_JPrepared,
+	BH_JRestore_dirty,
+	BH_JTest,		// debugging only will go away
+};
+
+BUFFER_FNS(JDirty, journaled);
+TAS_BUFFER_FNS(JDirty, journaled);
+BUFFER_FNS(JDirty_wait, journal_dirty);
+TAS_BUFFER_FNS(JDirty_wait, journal_dirty);
+BUFFER_FNS(JNew, journal_new);
+TAS_BUFFER_FNS(JNew, journal_new);
+BUFFER_FNS(JPrepared, journal_prepared);
+TAS_BUFFER_FNS(JPrepared, journal_prepared);
+BUFFER_FNS(JRestore_dirty, journal_restore_dirty);
+TAS_BUFFER_FNS(JRestore_dirty, journal_restore_dirty);
+BUFFER_FNS(JTest, journal_test);
+TAS_BUFFER_FNS(JTest, journal_test);
+
+/*
+** transaction handle which is passed around for all journal calls
+*/
+struct reiserfs_transaction_handle {
+	struct super_block *t_super;	/* super for this FS when journal_begin was
+					   called. saves calls to reiserfs_get_super
+					   also used by nested transactions to make
+					   sure they are nesting on the right FS
+					   _must_ be first in the handle
+					 */
+	int t_refcount;
+	int t_blocks_logged;	/* number of blocks this writer has logged */
+	int t_blocks_allocated;	/* number of blocks this writer allocated */
+	unsigned int t_trans_id;	/* sanity check, equals the current trans id */
+	void *t_handle_save;	/* save existing current->journal_info */
+	unsigned displace_new_blocks:1;	/* if new block allocation occurres, that block
+					   should be displaced from others */
+	struct list_head t_list;
+};
+
+/* used to keep track of ordered and tail writes, attached to the buffer
+ * head through b_journal_head.
+ */
+struct reiserfs_jh {
+	struct reiserfs_journal_list *jl;
+	struct buffer_head *bh;
+	struct list_head list;
+};
+
+void reiserfs_free_jh(struct buffer_head *bh);
+int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh);
+int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh);
+int journal_mark_dirty(struct reiserfs_transaction_handle *,
+		       struct super_block *, struct buffer_head *bh);
+
+static inline int reiserfs_file_data_log(struct inode *inode)
+{
+	if (reiserfs_data_log(inode->i_sb) ||
+	    (REISERFS_I(inode)->i_flags & i_data_log))
+		return 1;
+	return 0;
+}
+
+static inline int reiserfs_transaction_running(struct super_block *s)
+{
+	struct reiserfs_transaction_handle *th = current->journal_info;
+	if (th && th->t_super == s)
+		return 1;
+	if (th && th->t_super == NULL)
+		BUG();
+	return 0;
+}
+
+static inline int reiserfs_transaction_free_space(struct reiserfs_transaction_handle *th)
+{
+	return th->t_blocks_allocated - th->t_blocks_logged;
+}
+
+struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct
+								    super_block
+								    *,
+								    int count);
+int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *);
+int reiserfs_commit_page(struct inode *inode, struct page *page,
+			 unsigned from, unsigned to);
+int reiserfs_flush_old_commits(struct super_block *);
+int reiserfs_commit_for_inode(struct inode *);
+int reiserfs_inode_needs_commit(struct inode *);
+void reiserfs_update_inode_transaction(struct inode *);
+void reiserfs_wait_on_write_block(struct super_block *s);
+void reiserfs_block_writes(struct reiserfs_transaction_handle *th);
+void reiserfs_allow_writes(struct super_block *s);
+void reiserfs_check_lock_depth(struct super_block *s, char *caller);
+int reiserfs_prepare_for_journal(struct super_block *, struct buffer_head *bh,
+				 int wait);
+void reiserfs_restore_prepared_buffer(struct super_block *,
+				      struct buffer_head *bh);
+int journal_init(struct super_block *, const char *j_dev_name, int old_format,
+		 unsigned int);
+int journal_release(struct reiserfs_transaction_handle *, struct super_block *);
+int journal_release_error(struct reiserfs_transaction_handle *,
+			  struct super_block *);
+int journal_end(struct reiserfs_transaction_handle *, struct super_block *,
+		unsigned long);
+int journal_end_sync(struct reiserfs_transaction_handle *, struct super_block *,
+		     unsigned long);
+int journal_mark_freed(struct reiserfs_transaction_handle *,
+		       struct super_block *, b_blocknr_t blocknr);
+int journal_transaction_should_end(struct reiserfs_transaction_handle *, int);
+int reiserfs_in_journal(struct super_block *sb, unsigned int bmap_nr,
+			 int bit_nr, int searchall, b_blocknr_t *next);
+int journal_begin(struct reiserfs_transaction_handle *,
+		  struct super_block *sb, unsigned long);
+int journal_join_abort(struct reiserfs_transaction_handle *,
+		       struct super_block *sb, unsigned long);
+void reiserfs_abort_journal(struct super_block *sb, int errno);
+void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...);
+int reiserfs_allocate_list_bitmaps(struct super_block *s,
+				   struct reiserfs_list_bitmap *, unsigned int);
+
+void add_save_link(struct reiserfs_transaction_handle *th,
+		   struct inode *inode, int truncate);
+int remove_save_link(struct inode *inode, int truncate);
+
+/* objectid.c */
+__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th);
+void reiserfs_release_objectid(struct reiserfs_transaction_handle *th,
+			       __u32 objectid_to_release);
+int reiserfs_convert_objectid_map_v1(struct super_block *);
+
+/* stree.c */
+int B_IS_IN_TREE(const struct buffer_head *);
+extern void copy_item_head(struct item_head *to,
+			   const struct item_head *from);
+
+// first key is in cpu form, second - le
+extern int comp_short_keys(const struct reiserfs_key *le_key,
+			   const struct cpu_key *cpu_key);
+extern void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from);
+
+// both are in le form
+extern int comp_le_keys(const struct reiserfs_key *,
+			const struct reiserfs_key *);
+extern int comp_short_le_keys(const struct reiserfs_key *,
+			      const struct reiserfs_key *);
+
+//
+// get key version from on disk key - kludge
+//
+static inline int le_key_version(const struct reiserfs_key *key)
+{
+	int type;
+
+	type = offset_v2_k_type(&(key->u.k_offset_v2));
+	if (type != TYPE_DIRECT && type != TYPE_INDIRECT
+	    && type != TYPE_DIRENTRY)
+		return KEY_FORMAT_3_5;
+
+	return KEY_FORMAT_3_6;
+
+}
+
+static inline void copy_key(struct reiserfs_key *to,
+			    const struct reiserfs_key *from)
+{
+	memcpy(to, from, KEY_SIZE);
+}
+
+int comp_items(const struct item_head *stored_ih, const struct treepath *path);
+const struct reiserfs_key *get_rkey(const struct treepath *chk_path,
+				    const struct super_block *sb);
+int search_by_key(struct super_block *, const struct cpu_key *,
+		  struct treepath *, int);
+#define search_item(s,key,path) search_by_key (s, key, path, DISK_LEAF_NODE_LEVEL)
+int search_for_position_by_key(struct super_block *sb,
+			       const struct cpu_key *cpu_key,
+			       struct treepath *search_path);
+extern void decrement_bcount(struct buffer_head *bh);
+void decrement_counters_in_path(struct treepath *search_path);
+void pathrelse(struct treepath *search_path);
+int reiserfs_check_path(struct treepath *p);
+void pathrelse_and_restore(struct super_block *s, struct treepath *search_path);
+
+int reiserfs_insert_item(struct reiserfs_transaction_handle *th,
+			 struct treepath *path,
+			 const struct cpu_key *key,
+			 struct item_head *ih,
+			 struct inode *inode, const char *body);
+
+int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th,
+			     struct treepath *path,
+			     const struct cpu_key *key,
+			     struct inode *inode,
+			     const char *body, int paste_size);
+
+int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th,
+			   struct treepath *path,
+			   struct cpu_key *key,
+			   struct inode *inode,
+			   struct page *page, loff_t new_file_size);
+
+int reiserfs_delete_item(struct reiserfs_transaction_handle *th,
+			 struct treepath *path,
+			 const struct cpu_key *key,
+			 struct inode *inode, struct buffer_head *un_bh);
+
+void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th,
+				struct inode *inode, struct reiserfs_key *key);
+int reiserfs_delete_object(struct reiserfs_transaction_handle *th,
+			   struct inode *inode);
+int reiserfs_do_truncate(struct reiserfs_transaction_handle *th,
+			 struct inode *inode, struct page *,
+			 int update_timestamps);
+
+#define i_block_size(inode) ((inode)->i_sb->s_blocksize)
+#define file_size(inode) ((inode)->i_size)
+#define tail_size(inode) (file_size (inode) & (i_block_size (inode) - 1))
+
+#define tail_has_to_be_packed(inode) (have_large_tails ((inode)->i_sb)?\
+!STORE_TAIL_IN_UNFM_S1(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):have_small_tails ((inode)->i_sb)?!STORE_TAIL_IN_UNFM_S2(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):0 )
+
+void padd_item(char *item, int total_length, int length);
+
+/* inode.c */
+/* args for the create parameter of reiserfs_get_block */
+#define GET_BLOCK_NO_CREATE 0	/* don't create new blocks or convert tails */
+#define GET_BLOCK_CREATE 1	/* add anything you need to find block */
+#define GET_BLOCK_NO_HOLE 2	/* return -ENOENT for file holes */
+#define GET_BLOCK_READ_DIRECT 4	/* read the tail if indirect item not found */
+#define GET_BLOCK_NO_IMUX     8	/* i_mutex is not held, don't preallocate */
+#define GET_BLOCK_NO_DANGLE   16	/* don't leave any transactions running */
+
+void reiserfs_read_locked_inode(struct inode *inode,
+				struct reiserfs_iget_args *args);
+int reiserfs_find_actor(struct inode *inode, void *p);
+int reiserfs_init_locked_inode(struct inode *inode, void *p);
+void reiserfs_evict_inode(struct inode *inode);
+int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc);
+int reiserfs_get_block(struct inode *inode, sector_t block,
+		       struct buffer_head *bh_result, int create);
+struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
+				     int fh_len, int fh_type);
+struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid,
+				     int fh_len, int fh_type);
+int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
+		       int connectable);
+
+int reiserfs_truncate_file(struct inode *, int update_timestamps);
+void make_cpu_key(struct cpu_key *cpu_key, struct inode *inode, loff_t offset,
+		  int type, int key_length);
+void make_le_item_head(struct item_head *ih, const struct cpu_key *key,
+		       int version,
+		       loff_t offset, int type, int length, int entry_count);
+struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key);
+
+struct reiserfs_security_handle;
+int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
+		       struct inode *dir, umode_t mode,
+		       const char *symname, loff_t i_size,
+		       struct dentry *dentry, struct inode *inode,
+		       struct reiserfs_security_handle *security);
+
+void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th,
+			     struct inode *inode, loff_t size);
+
+static inline void reiserfs_update_sd(struct reiserfs_transaction_handle *th,
+				      struct inode *inode)
+{
+	reiserfs_update_sd_size(th, inode, inode->i_size);
+}
+
+void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode);
+void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs);
+int reiserfs_setattr(struct dentry *dentry, struct iattr *attr);
+
+int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len);
+
+/* namei.c */
+void set_de_name_and_namelen(struct reiserfs_dir_entry *de);
+int search_by_entry_key(struct super_block *sb, const struct cpu_key *key,
+			struct treepath *path, struct reiserfs_dir_entry *de);
+struct dentry *reiserfs_get_parent(struct dentry *);
+
+#ifdef CONFIG_REISERFS_PROC_INFO
+int reiserfs_proc_info_init(struct super_block *sb);
+int reiserfs_proc_info_done(struct super_block *sb);
+int reiserfs_proc_info_global_init(void);
+int reiserfs_proc_info_global_done(void);
+
+#define PROC_EXP( e )   e
+
+#define __PINFO( sb ) REISERFS_SB(sb) -> s_proc_info_data
+#define PROC_INFO_MAX( sb, field, value )								\
+    __PINFO( sb ).field =												\
+        max( REISERFS_SB( sb ) -> s_proc_info_data.field, value )
+#define PROC_INFO_INC( sb, field ) ( ++ ( __PINFO( sb ).field ) )
+#define PROC_INFO_ADD( sb, field, val ) ( __PINFO( sb ).field += ( val ) )
+#define PROC_INFO_BH_STAT( sb, bh, level )							\
+    PROC_INFO_INC( sb, sbk_read_at[ ( level ) ] );						\
+    PROC_INFO_ADD( sb, free_at[ ( level ) ], B_FREE_SPACE( bh ) );	\
+    PROC_INFO_ADD( sb, items_at[ ( level ) ], B_NR_ITEMS( bh ) )
+#else
+static inline int reiserfs_proc_info_init(struct super_block *sb)
+{
+	return 0;
+}
+
+static inline int reiserfs_proc_info_done(struct super_block *sb)
+{
+	return 0;
+}
+
+static inline int reiserfs_proc_info_global_init(void)
+{
+	return 0;
+}
+
+static inline int reiserfs_proc_info_global_done(void)
+{
+	return 0;
+}
+
+#define PROC_EXP( e )
+#define VOID_V ( ( void ) 0 )
+#define PROC_INFO_MAX( sb, field, value ) VOID_V
+#define PROC_INFO_INC( sb, field ) VOID_V
+#define PROC_INFO_ADD( sb, field, val ) VOID_V
+#define PROC_INFO_BH_STAT(sb, bh, n_node_level) VOID_V
+#endif
+
+/* dir.c */
+extern const struct inode_operations reiserfs_dir_inode_operations;
+extern const struct inode_operations reiserfs_symlink_inode_operations;
+extern const struct inode_operations reiserfs_special_inode_operations;
+extern const struct file_operations reiserfs_dir_operations;
+int reiserfs_readdir_dentry(struct dentry *, void *, filldir_t, loff_t *);
+
+/* tail_conversion.c */
+int direct2indirect(struct reiserfs_transaction_handle *, struct inode *,
+		    struct treepath *, struct buffer_head *, loff_t);
+int indirect2direct(struct reiserfs_transaction_handle *, struct inode *,
+		    struct page *, struct treepath *, const struct cpu_key *,
+		    loff_t, char *);
+void reiserfs_unmap_buffer(struct buffer_head *);
+
+/* file.c */
+extern const struct inode_operations reiserfs_file_inode_operations;
+extern const struct file_operations reiserfs_file_operations;
+extern const struct address_space_operations reiserfs_address_space_operations;
+
+/* fix_nodes.c */
+
+int fix_nodes(int n_op_mode, struct tree_balance *tb,
+	      struct item_head *ins_ih, const void *);
+void unfix_nodes(struct tree_balance *);
+
+/* prints.c */
+void __reiserfs_panic(struct super_block *s, const char *id,
+		      const char *function, const char *fmt, ...)
+    __attribute__ ((noreturn));
+#define reiserfs_panic(s, id, fmt, args...) \
+	__reiserfs_panic(s, id, __func__, fmt, ##args)
+void __reiserfs_error(struct super_block *s, const char *id,
+		      const char *function, const char *fmt, ...);
+#define reiserfs_error(s, id, fmt, args...) \
+	 __reiserfs_error(s, id, __func__, fmt, ##args)
+void reiserfs_info(struct super_block *s, const char *fmt, ...);
+void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...);
+void print_indirect_item(struct buffer_head *bh, int item_num);
+void store_print_tb(struct tree_balance *tb);
+void print_cur_tb(char *mes);
+void print_de(struct reiserfs_dir_entry *de);
+void print_bi(struct buffer_info *bi, char *mes);
+#define PRINT_LEAF_ITEMS 1	/* print all items */
+#define PRINT_DIRECTORY_ITEMS 2	/* print directory items */
+#define PRINT_DIRECT_ITEMS 4	/* print contents of direct items */
+void print_block(struct buffer_head *bh, ...);
+void print_bmap(struct super_block *s, int silent);
+void print_bmap_block(int i, char *data, int size, int silent);
+/*void print_super_block (struct super_block * s, char * mes);*/
+void print_objectid_map(struct super_block *s);
+void print_block_head(struct buffer_head *bh, char *mes);
+void check_leaf(struct buffer_head *bh);
+void check_internal(struct buffer_head *bh);
+void print_statistics(struct super_block *s);
+char *reiserfs_hashname(int code);
+
+/* lbalance.c */
+int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num,
+		    int mov_bytes, struct buffer_head *Snew);
+int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes);
+int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes);
+void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first,
+		       int del_num, int del_bytes);
+void leaf_insert_into_buf(struct buffer_info *bi, int before,
+			  struct item_head *inserted_item_ih,
+			  const char *inserted_item_body, int zeros_number);
+void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num,
+			  int pos_in_item, int paste_size, const char *body,
+			  int zeros_number);
+void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
+			  int pos_in_item, int cut_size);
+void leaf_paste_entries(struct buffer_info *bi, int item_num, int before,
+			int new_entry_count, struct reiserfs_de_head *new_dehs,
+			const char *records, int paste_size);
+/* ibalance.c */
+int balance_internal(struct tree_balance *, int, int, struct item_head *,
+		     struct buffer_head **);
+
+/* do_balance.c */
+void do_balance_mark_leaf_dirty(struct tree_balance *tb,
+				struct buffer_head *bh, int flag);
+#define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty
+#define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty
+
+void do_balance(struct tree_balance *tb, struct item_head *ih,
+		const char *body, int flag);
+void reiserfs_invalidate_buffer(struct tree_balance *tb,
+				struct buffer_head *bh);
+
+int get_left_neighbor_position(struct tree_balance *tb, int h);
+int get_right_neighbor_position(struct tree_balance *tb, int h);
+void replace_key(struct tree_balance *tb, struct buffer_head *, int,
+		 struct buffer_head *, int);
+void make_empty_node(struct buffer_info *);
+struct buffer_head *get_FEB(struct tree_balance *);
+
+/* bitmap.c */
+
+/* structure contains hints for block allocator, and it is a container for
+ * arguments, such as node, search path, transaction_handle, etc. */
+struct __reiserfs_blocknr_hint {
+	struct inode *inode;	/* inode passed to allocator, if we allocate unf. nodes */
+	sector_t block;		/* file offset, in blocks */
+	struct in_core_key key;
+	struct treepath *path;	/* search path, used by allocator to deternine search_start by
+				 * various ways */
+	struct reiserfs_transaction_handle *th;	/* transaction handle is needed to log super blocks and
+						 * bitmap blocks changes  */
+	b_blocknr_t beg, end;
+	b_blocknr_t search_start;	/* a field used to transfer search start value (block number)
+					 * between different block allocator procedures
+					 * (determine_search_start() and others) */
+	int prealloc_size;	/* is set in determine_prealloc_size() function, used by underlayed
+				 * function that do actual allocation */
+
+	unsigned formatted_node:1;	/* the allocator uses different polices for getting disk space for
+					 * formatted/unformatted blocks with/without preallocation */
+	unsigned preallocate:1;
+};
+
+typedef struct __reiserfs_blocknr_hint reiserfs_blocknr_hint_t;
+
+int reiserfs_parse_alloc_options(struct super_block *, char *);
+void reiserfs_init_alloc_options(struct super_block *s);
+
+/*
+ * given a directory, this will tell you what packing locality
+ * to use for a new object underneat it.  The locality is returned
+ * in disk byte order (le).
+ */
+__le32 reiserfs_choose_packing(struct inode *dir);
+
+int reiserfs_init_bitmap_cache(struct super_block *sb);
+void reiserfs_free_bitmap_cache(struct super_block *sb);
+void reiserfs_cache_bitmap_metadata(struct super_block *sb, struct buffer_head *bh, struct reiserfs_bitmap_info *info);
+struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, unsigned int bitmap);
+int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value);
+void reiserfs_free_block(struct reiserfs_transaction_handle *th, struct inode *,
+			 b_blocknr_t, int for_unformatted);
+int reiserfs_allocate_blocknrs(reiserfs_blocknr_hint_t *, b_blocknr_t *, int,
+			       int);
+static inline int reiserfs_new_form_blocknrs(struct tree_balance *tb,
+					     b_blocknr_t * new_blocknrs,
+					     int amount_needed)
+{
+	reiserfs_blocknr_hint_t hint = {
+		.th = tb->transaction_handle,
+		.path = tb->tb_path,
+		.inode = NULL,
+		.key = tb->key,
+		.block = 0,
+		.formatted_node = 1
+	};
+	return reiserfs_allocate_blocknrs(&hint, new_blocknrs, amount_needed,
+					  0);
+}
+
+static inline int reiserfs_new_unf_blocknrs(struct reiserfs_transaction_handle
+					    *th, struct inode *inode,
+					    b_blocknr_t * new_blocknrs,
+					    struct treepath *path,
+					    sector_t block)
+{
+	reiserfs_blocknr_hint_t hint = {
+		.th = th,
+		.path = path,
+		.inode = inode,
+		.block = block,
+		.formatted_node = 0,
+		.preallocate = 0
+	};
+	return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0);
+}
+
+#ifdef REISERFS_PREALLOCATE
+static inline int reiserfs_new_unf_blocknrs2(struct reiserfs_transaction_handle
+					     *th, struct inode *inode,
+					     b_blocknr_t * new_blocknrs,
+					     struct treepath *path,
+					     sector_t block)
+{
+	reiserfs_blocknr_hint_t hint = {
+		.th = th,
+		.path = path,
+		.inode = inode,
+		.block = block,
+		.formatted_node = 0,
+		.preallocate = 1
+	};
+	return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0);
+}
+
+void reiserfs_discard_prealloc(struct reiserfs_transaction_handle *th,
+			       struct inode *inode);
+void reiserfs_discard_all_prealloc(struct reiserfs_transaction_handle *th);
+#endif
+
+/* hashes.c */
+__u32 keyed_hash(const signed char *msg, int len);
+__u32 yura_hash(const signed char *msg, int len);
+__u32 r5_hash(const signed char *msg, int len);
+
+#define reiserfs_set_le_bit		__set_bit_le
+#define reiserfs_test_and_set_le_bit	__test_and_set_bit_le
+#define reiserfs_clear_le_bit		__clear_bit_le
+#define reiserfs_test_and_clear_le_bit	__test_and_clear_bit_le
+#define reiserfs_test_le_bit		test_bit_le
+#define reiserfs_find_next_zero_le_bit	find_next_zero_bit_le
+
+/* sometimes reiserfs_truncate may require to allocate few new blocks
+   to perform indirect2direct conversion. People probably used to
+   think, that truncate should work without problems on a filesystem
+   without free disk space. They may complain that they can not
+   truncate due to lack of free disk space. This spare space allows us
+   to not worry about it. 500 is probably too much, but it should be
+   absolutely safe */
+#define SPARE_SPACE 500
+
+/* prototypes from ioctl.c */
+long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
+long reiserfs_compat_ioctl(struct file *filp,
+		   unsigned int cmd, unsigned long arg);
+int reiserfs_unpack(struct inode *inode, struct file *filp);

fs/reiserfs/resize.c

···
 #include <linux/vmalloc.h>
 #include <linux/string.h>
 #include <linux/errno.h>
-#include <linux/reiserfs_fs.h>
-#include <linux/reiserfs_fs_sb.h>
+#include "reiserfs.h"
 #include <linux/buffer_head.h>
 
 int reiserfs_resize(struct super_block *s, unsigned long block_count_new)

fs/reiserfs/stree.c

···
 #include <linux/time.h>
 #include <linux/string.h>
 #include <linux/pagemap.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/buffer_head.h>
 #include <linux/quotaops.h>
 

fs/reiserfs/super.c

···
 #include <linux/vmalloc.h>
 #include <linux/time.h>
 #include <asm/uaccess.h>
-#include <linux/reiserfs_fs.h>
-#include <linux/reiserfs_acl.h>
-#include <linux/reiserfs_xattr.h>
+#include "reiserfs.h"
+#include "acl.h"
+#include "xattr.h"
 #include <linux/init.h>
 #include <linux/blkdev.h>
 #include <linux/buffer_head.h>
···
 		unlock_new_inode(root_inode);
 	}
 
-	s->s_root = d_alloc_root(root_inode);
-	if (!s->s_root) {
-		iput(root_inode);
+	s->s_root = d_make_root(root_inode);
+	if (!s->s_root)
 		goto error;
-	}
 	// define and initialize hash function
 	sbi->s_hash_function = hash_function(s);
 	if (sbi->s_hash_function == NULL) {

fs/reiserfs/tail_conversion.c

···
 #include <linux/time.h>
 #include <linux/pagemap.h>
 #include <linux/buffer_head.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 
 /* access to tail : when one is going to read tail it must make sure, that is not running.
  direct2indirect and indirect2direct can not run concurrently */

fs/reiserfs/xattr.c

···
  * The xattrs themselves are protected by the xattr_sem.
  */
 
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/capability.h>
 #include <linux/dcache.h>
 #include <linux/namei.h>
···
 #include <linux/file.h>
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
-#include <linux/reiserfs_xattr.h>
-#include <linux/reiserfs_acl.h>
+#include "xattr.h"
+#include "acl.h"
 #include <asm/uaccess.h>
 #include <net/checksum.h>
 #include <linux/stat.h>

fs/reiserfs/xattr.h

···
+#include <linux/reiserfs_xattr.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/rwsem.h>
+
+struct inode;
+struct dentry;
+struct iattr;
+struct super_block;
+struct nameidata;
+
+int reiserfs_xattr_register_handlers(void) __init;
+void reiserfs_xattr_unregister_handlers(void);
+int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
+int reiserfs_lookup_privroot(struct super_block *sb);
+int reiserfs_delete_xattrs(struct inode *inode);
+int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
+int reiserfs_permission(struct inode *inode, int mask);
+
+#ifdef CONFIG_REISERFS_FS_XATTR
+#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
+ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
+			  void *buffer, size_t size);
+int reiserfs_setxattr(struct dentry *dentry, const char *name,
+		      const void *value, size_t size, int flags);
+ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+int reiserfs_removexattr(struct dentry *dentry, const char *name);
+
+int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
+int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
+int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
+			      struct inode *, const char *, const void *,
+			      size_t, int);
+
+extern const struct xattr_handler reiserfs_xattr_user_handler;
+extern const struct xattr_handler reiserfs_xattr_trusted_handler;
+extern const struct xattr_handler reiserfs_xattr_security_handler;
+#ifdef CONFIG_REISERFS_FS_SECURITY
+int reiserfs_security_init(struct inode *dir, struct inode *inode,
+			   const struct qstr *qstr,
+			   struct reiserfs_security_handle *sec);
+int reiserfs_security_write(struct reiserfs_transaction_handle *th,
+			    struct inode *inode,
+			    struct reiserfs_security_handle *sec);
+void reiserfs_security_free(struct reiserfs_security_handle *sec);
+#endif
+
+static inline int reiserfs_xattrs_initialized(struct super_block *sb)
+{
+	return REISERFS_SB(sb)->priv_root != NULL;
+}
+
+#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
+static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
+{
+	loff_t ret = 0;
+	if (reiserfs_file_data_log(inode)) {
+		ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
+		ret >>= inode->i_sb->s_blocksize_bits;
+	}
+	return ret;
+}
+
+/* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
+ * Let's try to be smart about it.
+ * xattr root: We cache it. If it's not cached, we may need to create it.
+ * xattr dir: If anything has been loaded for this inode, we can set a flag
+ *            saying so.
+ * xattr file: Since we don't cache xattrs, we can't tell. We always include
+ *             blocks for it.
+ *
+ * However, since root and dir can be created between calls - YOU MUST SAVE
+ * THIS VALUE.
+ */
+static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
+{
+	size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
+
+	if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
+		nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
+		if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode)
+			nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
+	}
+
+	return nblocks;
+}
+
+static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
+{
+	init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
+}
+
+#else
+
+#define reiserfs_getxattr NULL
+#define reiserfs_setxattr NULL
+#define reiserfs_listxattr NULL
+#define reiserfs_removexattr NULL
+
+static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
+{
+}
+#endif  /*  CONFIG_REISERFS_FS_XATTR  */
+
+#ifndef CONFIG_REISERFS_FS_SECURITY
+static inline int reiserfs_security_init(struct inode *dir,
+					 struct inode *inode,
+					 const struct qstr *qstr,
+					 struct reiserfs_security_handle *sec)
+{
+	return 0;
+}
+static inline int
+reiserfs_security_write(struct reiserfs_transaction_handle *th,
+			struct inode *inode,
+			struct reiserfs_security_handle *sec)
+{
+	return 0;
+}
+static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
+{}
+#endif

fs/reiserfs/xattr_acl.c

···
 #include <linux/capability.h>
 #include <linux/fs.h>
 #include <linux/posix_acl.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/errno.h>
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
 #include <linux/slab.h>
 #include <linux/posix_acl_xattr.h>
-#include <linux/reiserfs_xattr.h>
-#include <linux/reiserfs_acl.h>
+#include "xattr.h"
+#include "acl.h"
 #include <asm/uaccess.h>
 
 static int reiserfs_set_acl(struct reiserfs_transaction_handle *th,

fs/reiserfs/xattr_security.c

···
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
 #include <linux/slab.h>
-#include <linux/reiserfs_xattr.h>
+#include "xattr.h"
 #include <linux/security.h>
 #include <asm/uaccess.h>
 

fs/reiserfs/xattr_trusted.c

···
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/capability.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
-#include <linux/reiserfs_xattr.h>
+#include "xattr.h"
 #include <asm/uaccess.h>
 
 static int

fs/reiserfs/xattr_user.c

···
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
-#include <linux/reiserfs_xattr.h>
+#include "xattr.h"
 #include <asm/uaccess.h>
 
 static int

fs/romfs/super.c

···
 	if (IS_ERR(root))
 		goto error;
 
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root)
-		goto error_i;
+		goto error;
 
 	return 0;
 
-error_i:
-	iput(root);
 error:
 	return -EINVAL;
 error_rsb_inval:

fs/squashfs/super.c

···
 	}
 	insert_inode_hash(root);
 
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (sb->s_root == NULL) {
 		ERROR("Root inode create failed\n");
 		err = -ENOMEM;
-		iput(root);
 		goto failed_mount;
 	}
 

fs/stat.c

···
 		if (inode->i_op->readlink) {
 			error = security_inode_readlink(path.dentry);
 			if (!error) {
-				touch_atime(path.mnt, path.dentry);
+				touch_atime(&path);
 				error = inode->i_op->readlink(path.dentry,
 							      buf, bufsiz);
 			}

fs/sysfs/mount.c

···
 	}
 
 	/* instantiate and link root dentry */
-	root = d_alloc_root(inode);
+	root = d_make_root(inode);
 	if (!root) {
 		pr_debug("%s: could not get root dentry!\n",__func__);
-		iput(inode);
 		return -ENOMEM;
 	}
 	root->d_fsdata = &sysfs_root;

fs/sysv/namei.c

···
 {
 	struct inode *inode = old_dentry->d_inode;
 
-	if (inode->i_nlink >= SYSV_SB(inode->i_sb)->s_link_max)
-		return -EMLINK;
-
 	inode->i_ctime = CURRENT_TIME_SEC;
 	inode_inc_link_count(inode);
 	ihold(inode);
···
 static int sysv_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode)
 {
 	struct inode * inode;
-	int err = -EMLINK;
+	int err;
 
-	if (dir->i_nlink >= SYSV_SB(dir->i_sb)->s_link_max) 
-		goto out;
 	inode_inc_link_count(dir);
 
 	inode = sysv_new_inode(dir, S_IFDIR|mode);
···
 			drop_nlink(new_inode);
 		inode_dec_link_count(new_inode);
 	} else {
-		if (dir_de) {
-			err = -EMLINK;
-			if (new_dir->i_nlink >= SYSV_SB(new_dir->i_sb)->s_link_max)
-				goto out_dir;
-		}
 		err = sysv_add_link(new_dentry, old_inode);
 		if (err)
 			goto out_dir;

fs/sysv/super.c

···
 	JAN_1_1980 = (10*365 + 2) * 24 * 60 * 60
 };
 
-static void detected_xenix(struct sysv_sb_info *sbi)
+static void detected_xenix(struct sysv_sb_info *sbi, unsigned *max_links)
 {
 	struct buffer_head *bh1 = sbi->s_bh1;
 	struct buffer_head *bh2 = sbi->s_bh2;
···
 		sbd2 = (struct xenix_super_block *) (bh2->b_data - 512);
 	}
 
-	sbi->s_link_max = XENIX_LINK_MAX;
+	*max_links = XENIX_LINK_MAX;
 	sbi->s_fic_size = XENIX_NICINOD;
 	sbi->s_flc_size = XENIX_NICFREE;
 	sbi->s_sbd1 = (char *)sbd1;
···
 	sbi->s_nzones = fs32_to_cpu(sbi, sbd1->s_fsize);
 }
 
-static void detected_sysv4(struct sysv_sb_info *sbi)
+static void detected_sysv4(struct sysv_sb_info *sbi, unsigned *max_links)
 {
 	struct sysv4_super_block * sbd;
 	struct buffer_head *bh1 = sbi->s_bh1;
···
 	else
 		sbd = (struct sysv4_super_block *) bh2->b_data;
 
-	sbi->s_link_max = SYSV_LINK_MAX;
+	*max_links = SYSV_LINK_MAX;
 	sbi->s_fic_size = SYSV_NICINOD;
 	sbi->s_flc_size = SYSV_NICFREE;
 	sbi->s_sbd1 = (char *)sbd;
···
 	sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
 }
 
-static void detected_sysv2(struct sysv_sb_info *sbi)
+static void detected_sysv2(struct sysv_sb_info *sbi, unsigned *max_links)
 {
 	struct sysv2_super_block *sbd;
 	struct buffer_head *bh1 = sbi->s_bh1;
···
 	else
 		sbd = (struct sysv2_super_block *) bh2->b_data;
 
-	sbi->s_link_max = SYSV_LINK_MAX;
+	*max_links = SYSV_LINK_MAX;
 	sbi->s_fic_size = SYSV_NICINOD;
 	sbi->s_flc_size = SYSV_NICFREE;
 	sbi->s_sbd1 = (char *)sbd;
···
 	sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
 }
 
-static void detected_coherent(struct sysv_sb_info *sbi)
+static void detected_coherent(struct sysv_sb_info *sbi, unsigned *max_links)
 {
 	struct coh_super_block * sbd;
 	struct buffer_head *bh1 = sbi->s_bh1;
 
 	sbd = (struct coh_super_block *) bh1->b_data;
 
-	sbi->s_link_max = COH_LINK_MAX;
+	*max_links = COH_LINK_MAX;
 	sbi->s_fic_size = COH_NICINOD;
 	sbi->s_flc_size = COH_NICFREE;
 	sbi->s_sbd1 = (char *)sbd;
···
 	sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
 }
 
-static void detected_v7(struct sysv_sb_info *sbi)
+static void detected_v7(struct sysv_sb_info *sbi, unsigned *max_links)
 {
 	struct buffer_head *bh2 = sbi->s_bh2;
 	struct v7_super_block *sbd = (struct v7_super_block *)bh2->b_data;
 
-	sbi->s_link_max = V7_LINK_MAX;
+	*max_links = V7_LINK_MAX;
 	sbi->s_fic_size = V7_NICINOD;
 	sbi->s_flc_size = V7_NICFREE;
 	sbi->s_sbd1 = (char *)sbd;
···
 	[FSTYPE_AFS]	= "AFS",
 };
 
-static void (*flavour_setup[])(struct sysv_sb_info *) = {
+static void (*flavour_setup[])(struct sysv_sb_info *, unsigned *) = {
 	[FSTYPE_XENIX]	= detected_xenix,
 	[FSTYPE_SYSV4]	= detected_sysv4,
 	[FSTYPE_SYSV2]	= detected_sysv2,
···
 
 	sbi->s_firstinodezone = 2;
 
-	flavour_setup[sbi->s_type](sbi);
+	flavour_setup[sbi->s_type](sbi, &sb->s_max_links);
 	
 	sbi->s_truncate = 1;
 	sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone;
···
 		printk("SysV FS: get root inode failed\n");
 		return 0;
 	}
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
 	if (!sb->s_root) {
-		iput(root_inode);
 		printk("SysV FS: get root dentry failed\n");
 		return 0;
 	}

fs/sysv/sysv.h

···
 	char	       s_bytesex;	/* bytesex (le/be/pdp) */
 	char	       s_truncate;	/* if 1: names > SYSV_NAMELEN chars are truncated */
 					/* if 0: they are disallowed (ENAMETOOLONG) */
-	nlink_t        s_link_max;	/* max number of hard links to a file */
 	unsigned int   s_inodes_per_block;	/* number of inodes per block */
 	unsigned int   s_inodes_per_block_1;	/* inodes_per_block - 1 */
 	unsigned int   s_inodes_per_block_bits;	/* log2(inodes_per_block) */

fs/ubifs/super.c

···
 		goto out_umount;
 	}
 
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root)
-		goto out_iput;
+		goto out_umount;
 
 	mutex_unlock(&c->umount_mutex);
 	return 0;
 
-out_iput:
-	iput(root);
 out_umount:
 	ubifs_umount(c);
 out_unlock:

fs/udf/namei.c

···
 #include <linux/crc-itu-t.h>
 #include <linux/exportfs.h>
 
-enum { UDF_MAX_LINKS = 0xffff };
-
 static inline int udf_match(int len1, const unsigned char *name1, int len2,
 			    const unsigned char *name2)
 {
···
 	struct udf_inode_info *dinfo = UDF_I(dir);
 	struct udf_inode_info *iinfo;
 
-	err = -EMLINK;
-	if (dir->i_nlink >= UDF_MAX_LINKS)
-		goto out;
-
 	err = -EIO;
 	inode = udf_new_inode(dir, S_IFDIR | mode, &err);
 	if (!inode)
···
 	struct fileIdentDesc cfi, *fi;
 	int err;
 
-	if (inode->i_nlink >= UDF_MAX_LINKS)
-		return -EMLINK;
-
 	fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 	if (!fi) {
 		return err;
···
 		tloc = lelb_to_cpu(dir_fi->icb.extLocation);
 		if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
 				old_dir->i_ino)
-			goto end_rename;
-
-		retval = -EMLINK;
-		if (!new_inode && new_dir->i_nlink >= UDF_MAX_LINKS)
 			goto end_rename;
 	}
 	if (!nfi) {

fs/udf/super.c

···
 
 #define UDF_DEFAULT_BLOCKSIZE 2048
 
+enum { UDF_MAX_LINKS = 0xffff };
+
 /* These are the "meat" - everything else is stuffing */
 static int udf_fill_super(struct super_block *, void *, int);
 static void udf_put_super(struct super_block *);
···
 	}
 
 	/* Allocate a dentry for the root inode */
-	sb->s_root = d_alloc_root(inode);
+	sb->s_root = d_make_root(inode);
 	if (!sb->s_root) {
 		udf_err(sb, "Couldn't allocate root dentry\n");
-		iput(inode);
 		goto error_out;
 	}
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
+	sb->s_max_links = UDF_MAX_LINKS;
 	return 0;
 
 error_out:

fs/ufs/namei.c

···
 	int error;
 
 	lock_ufs(dir->i_sb);
-	if (inode->i_nlink >= UFS_LINK_MAX) {
-		unlock_ufs(dir->i_sb);
-		return -EMLINK;
-	}
 
 	inode->i_ctime = CURRENT_TIME_SEC;
 	inode_inc_link_count(inode);
···
 static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
 {
 	struct inode * inode;
-	int err = -EMLINK;
-
-	if (dir->i_nlink >= UFS_LINK_MAX)
-		goto out;
+	int err;
 
 	lock_ufs(dir->i_sb);
 	inode_inc_link_count(dir);
···
 			drop_nlink(new_inode);
 		inode_dec_link_count(new_inode);
 	} else {
-		if (dir_de) {
-			err = -EMLINK;
-			if (new_dir->i_nlink >= UFS_LINK_MAX)
-				goto out_dir;
-		}
 		err = ufs_add_link(new_dentry, old_inode);
 		if (err)
 			goto out_dir;

fs/ufs/super.c

···
 			    "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
 		uspi->s_maxsymlinklen = maxsymlen;
 	}
+	sb->s_max_links = UFS_LINK_MAX;
 
 	inode = ufs_iget(sb, UFS_ROOTINO);
 	if (IS_ERR(inode)) {
 		ret = PTR_ERR(inode);
 		goto failed;
 	}
-	sb->s_root = d_alloc_root(inode);
+	sb->s_root = d_make_root(inode);
 	if (!sb->s_root) {
 		ret = -ENOMEM;
-		goto dalloc_failed;
+		goto failed;
 	}
 
 	ufs_setup_cstotal(sb);
···
 	UFSD("EXIT\n");
 	return 0;
 
-dalloc_failed:
-	iput(inode);
 failed:
 	if (ubh)
 		ubh_brelse_uspi (uspi);

fs/xfs/xfs_rename.c

···
 	new_parent = (src_dp != target_dp);
 	src_is_directory = S_ISDIR(src_ip->i_d.di_mode);
 
-	if (src_is_directory) {
-		/*
-		 * Check for link count overflow on target_dp
-		 */
-		if (target_ip == NULL && new_parent &&
-		    target_dp->i_d.di_nlink >= XFS_MAXLINK) {
-			error = XFS_ERROR(EMLINK);
-			goto std_return;
-		}
-	}
-
 	xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip,
 				inodes, &num_inodes);
 

fs/xfs/xfs_super.c

···
 	sb->s_blocksize = mp->m_sb.sb_blocksize;
 	sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
 	sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
+	sb->s_max_links = XFS_MAXLINK;
 	sb->s_time_gran = 1;
 	set_posix_acl_flag(sb);
 
···
 		error = EINVAL;
 		goto out_syncd_stop;
 	}
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		error = ENOMEM;
-		goto out_iput;
+		goto out_syncd_stop;
 	}
 
 	return 0;
···
  out:
 	return -error;
 
- out_iput:
-	iput(root);
  out_syncd_stop:
 	xfs_syncd_stop(mp);
  out_unmount:

fs/xfs/xfs_utils.c

···
 	xfs_trans_t *tp,
 	xfs_inode_t *ip)
 {
-	if (ip->i_d.di_nlink >= XFS_MAXLINK)
-		return XFS_ERROR(EMLINK);
 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
 
 	ASSERT(ip->i_d.di_nlink > 0);

fs/xfs/xfs_vnodeops.c

···
 	xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
 	unlock_dp_on_error = B_TRUE;
 
-	/*
-	 * Check for directory link count overflow.
-	 */
-	if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) {
-		error = XFS_ERROR(EMLINK);
-		goto out_trans_cancel;
-	}
-
 	xfs_bmap_init(&free_list, &first_block);
 
 	/*
···
 
 	xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL);
 	xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL);
-
-	/*
-	 * If the source has too many links, we can't make any more to it.
-	 */
-	if (sip->i_d.di_nlink >= XFS_MAXLINK) {
-		error = XFS_ERROR(EMLINK);
-		goto error_return;
-	}
 
 	/*
 	 * If we are using project inheritance, we only allow hard link

include/linux/audit.h

···
 						      const char *string);
 extern void		    audit_log_d_path(struct audit_buffer *ab,
 					     const char *prefix,
-					     struct path *path);
+					     const struct path *path);
 extern void		    audit_log_key(struct audit_buffer *ab,
 					  char *key);
 extern void		    audit_log_lost(const char *message);

include/linux/binfmts.h

···
 	unsigned long min_coredump;	/* minimal dump size */
 };
 
-extern int __register_binfmt(struct linux_binfmt *fmt, int insert);
+extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
 
 /* Registration of default binfmt handlers */
-static inline int register_binfmt(struct linux_binfmt *fmt)
+static inline void register_binfmt(struct linux_binfmt *fmt)
 {
-	return __register_binfmt(fmt, 0);
+	__register_binfmt(fmt, 0);
 }
 /* Same as above, but adds a new binfmt at the top of the list */
-static inline int insert_binfmt(struct linux_binfmt *fmt)
+static inline void insert_binfmt(struct linux_binfmt *fmt)
 {
-	return __register_binfmt(fmt, 1);
+	__register_binfmt(fmt, 1);
 }
 
 extern void unregister_binfmt(struct linux_binfmt *);

include/linux/dcache.h

···
 extern int d_invalidate(struct dentry *);
 
 /* only used at mount-time */
-extern struct dentry * d_alloc_root(struct inode *);
 extern struct dentry * d_make_root(struct inode *);
 
 /* <clickety>-<click> the ramfs-type tree */

include/linux/debugfs.h

···
 				  struct dentry *parent,
 				  struct debugfs_blob_wrapper *blob);
 
-struct dentry *debugfs_create_regset32(const char *name, mode_t mode,
+struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
 				     struct dentry *parent,
 				     struct debugfs_regset32 *regset);
 
···
 }
 
 static inline struct dentry *debugfs_create_regset32(const char *name,
-				   mode_t mode, struct dentry *parent,
+				   umode_t mode, struct dentry *parent,
 				   struct debugfs_regset32 *regset)
 {
 	return ERR_PTR(-ENODEV);

include/linux/file.h

···
 struct file;
 
 extern void fput(struct file *);
-extern void drop_file_write_access(struct file *file);
 
 struct file_operations;
 struct vfsmount;

include/linux/fs.h

···
 	u8 s_uuid[16];				/* UUID */
 
 	void 			*s_fs_info;	/* Filesystem private info */
+	unsigned int		s_max_links;
 	fmode_t			s_mode;
 
 	/* Granularity of c/m/atime in ns.
···
        spin_unlock(&inode->i_lock);
 }
 
-extern void touch_atime(struct vfsmount *mnt, struct dentry *dentry);
+extern void touch_atime(struct path *);
 static inline void file_accessed(struct file *file)
 {
 	if (!(file->f_flags & O_NOATIME))
-		touch_atime(file->f_path.mnt, file->f_path.dentry);
+		touch_atime(&file->f_path);
 }
 
 int sync_inode(struct inode *inode, struct writeback_control *wbc);
···
 extern ino_t iunique(struct super_block *, ino_t);
 extern int inode_needs_sync(struct inode *inode);
 extern int generic_delete_inode(struct inode *inode);
-extern int generic_drop_inode(struct inode *inode);
+static inline int generic_drop_inode(struct inode *inode)
+{
+	return !inode->i_nlink || inode_unhashed(inode);
+}
 
 extern struct inode *ilookup5_nowait(struct super_block *sb,
 		unsigned long hashval, int (*test)(struct inode *, void *),

include/linux/magic.h

···
 #define OPENPROM_SUPER_MAGIC	0x9fa1
 #define PROC_SUPER_MAGIC	0x9fa0
 #define QNX4_SUPER_MAGIC	0x002f		/* qnx4 fs detection */
+#define QNX6_SUPER_MAGIC	0x68191122	/* qnx6 fs detection */
 
 #define REISERFS_SUPER_MAGIC	0x52654973	/* used by gcc */
 					/* used by file system utilities that

include/linux/qnx6_fs.h

···
+/*
+ *  Name                 : qnx6_fs.h
+ *  Author               : Kai Bankett
+ *  Function             : qnx6 global filesystem definitions
+ *  History              : 17-01-2012 created
+ */
+#ifndef _LINUX_QNX6_FS_H
+#define _LINUX_QNX6_FS_H
+
+#include <linux/types.h>
+#include <linux/magic.h>
+
+#define QNX6_ROOT_INO 1
+
+/* for di_status */
+#define QNX6_FILE_DIRECTORY	0x01
+#define QNX6_FILE_DELETED	0x02
+#define QNX6_FILE_NORMAL	0x03
+
+#define QNX6_SUPERBLOCK_SIZE	0x200	/* superblock always is 512 bytes */
+#define QNX6_SUPERBLOCK_AREA	0x1000	/* area reserved for superblock */
+#define	QNX6_BOOTBLOCK_SIZE	0x2000	/* heading bootblock area */
+#define QNX6_DIR_ENTRY_SIZE	0x20	/* dir entry size of 32 bytes */
+#define QNX6_INODE_SIZE		0x80	/* each inode is 128 bytes */
+#define QNX6_INODE_SIZE_BITS	7	/* inode entry size shift */
+
+#define QNX6_NO_DIRECT_POINTERS	16	/* 16 blockptrs in sbl/inode */
+#define QNX6_PTR_MAX_LEVELS	5	/* maximum indirect levels */
+
+/* for filenames */
+#define QNX6_SHORT_NAME_MAX	27
+#define QNX6_LONG_NAME_MAX	510
+
+/* list of mount options */
+#define QNX6_MOUNT_MMI_FS	0x010000 /* mount as Audi MMI 3G fs */
+
+/*
+ * This is the original qnx6 inode layout on disk.
+ * Each inode is 128 byte long.
+ */
+struct qnx6_inode_entry {
+	__fs64		di_size;
+	__fs32		di_uid;
+	__fs32		di_gid;
+	__fs32		di_ftime;
+	__fs32		di_mtime;
+	__fs32		di_atime;
+	__fs32		di_ctime;
+	__fs16		di_mode;
+	__fs16		di_ext_mode;
+	__fs32		di_block_ptr[QNX6_NO_DIRECT_POINTERS];
+	__u8		di_filelevels;
+	__u8		di_status;
+	__u8		di_unknown2[2];
+	__fs32		di_zero2[6];
+};
+
+/*
+ * Each directory entry is maximum 32 bytes long.
+ * If more characters or special characters required it is stored
+ * in the longfilenames structure.
+ */
+struct qnx6_dir_entry {
+	__fs32		de_inode;
+	__u8		de_size;
+	char		de_fname[QNX6_SHORT_NAME_MAX];
+};
+
+/*
+ * Longfilename direntries have a different structure
+ */
+struct qnx6_long_dir_entry {
+	__fs32		de_inode;
+	__u8		de_size;
+	__u8		de_unknown[3];
+	__fs32		de_long_inode;
+	__fs32		de_checksum;
+};
+
+struct qnx6_long_filename {
+	__fs16		lf_size;
+	__u8		lf_fname[QNX6_LONG_NAME_MAX];
+};
+
+struct qnx6_root_node {
+	__fs64		size;
+	__fs32		ptr[QNX6_NO_DIRECT_POINTERS];
+	__u8		levels;
+	__u8		mode;
+	__u8		spare[6];
+};
+
+struct qnx6_super_block {
+	__fs32		sb_magic;
+	__fs32		sb_checksum;
+	__fs64		sb_serial;
+	__fs32		sb_ctime;	/* time the fs was created */
+	__fs32		sb_atime;	/* last access time */
+	__fs32		sb_flags;
+	__fs16		sb_version1;	/* filesystem version information */
+	__fs16		sb_version2;	/* filesystem version information */
+	__u8		sb_volumeid[16];
+	__fs32		sb_blocksize;
+	__fs32		sb_num_inodes;
+	__fs32		sb_free_inodes;
+	__fs32		sb_num_blocks;
+	__fs32		sb_free_blocks;
+	__fs32		sb_allocgroup;
+	struct qnx6_root_node Inode;
+	struct qnx6_root_node Bitmap;
+	struct qnx6_root_node Longfile;
+	struct qnx6_root_node Unknown;
+};
+
+/* Audi MMI 3G superblock layout is different to plain qnx6 */
+struct qnx6_mmi_super_block {
+	__fs32		sb_magic;
+	__fs32		sb_checksum;
+	__fs64		sb_serial;
+	__u8		sb_spare0[12];
+	__u8		sb_id[12];
+	__fs32		sb_blocksize;
+	__fs32		sb_num_inodes;
+	__fs32		sb_free_inodes;
+	__fs32		sb_num_blocks;
+	__fs32		sb_free_blocks;
+	__u8		sb_spare1[4];
+	struct qnx6_root_node Inode;
+	struct qnx6_root_node Bitmap;
+	struct qnx6_root_node Longfile;
+	struct qnx6_root_node Unknown;
+};
+
+#endif

include/linux/reiserfs_fs.h

···
 /*
  * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for licensing and copyright details
  */
-
-				/* this file has an amazingly stupid
-				   name, yura please fix it to be
-				   reiserfs.h, and merge all the rest
-				   of our .h files that are in this
-				   directory into it.  */
-
 #ifndef _LINUX_REISER_FS_H
 #define _LINUX_REISER_FS_H
 
 #include <linux/types.h>
 #include <linux/magic.h>
-
-#ifdef __KERNEL__
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/workqueue.h>
-#include <asm/unaligned.h>
-#include <linux/bitops.h>
-#include <linux/proc_fs.h>
-#include <linux/buffer_head.h>
-#include <linux/reiserfs_fs_i.h>
-#include <linux/reiserfs_fs_sb.h>
-#endif
 
 /*
  *  include/linux/reiser_fs.h
···
 #define REISERFS_IOC_SETFLAGS		FS_IOC_SETFLAGS
 #define REISERFS_IOC_GETVERSION		FS_IOC_GETVERSION
 #define REISERFS_IOC_SETVERSION		FS_IOC_SETVERSION
-
-#ifdef __KERNEL__
-/* the 32 bit compat definitions with int argument */
-#define REISERFS_IOC32_UNPACK		_IOW(0xCD, 1, int)
-#define REISERFS_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
-#define REISERFS_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
-#define REISERFS_IOC32_GETVERSION	FS_IOC32_GETVERSION
-#define REISERFS_IOC32_SETVERSION	FS_IOC32_SETVERSION
-
-/*
- * Locking primitives. The write lock is a per superblock
- * special mutex that has properties close to the Big Kernel Lock
- * which was used in the previous locking scheme.
- */
-void reiserfs_write_lock(struct super_block *s);
-void reiserfs_write_unlock(struct super_block *s);
-int reiserfs_write_lock_once(struct super_block *s);
-void reiserfs_write_unlock_once(struct super_block *s, int lock_depth);
-
-#ifdef CONFIG_REISERFS_CHECK
-void reiserfs_lock_check_recursive(struct super_block *s);
-#else
-static inline void reiserfs_lock_check_recursive(struct super_block *s) { }
-#endif
-
-/*
- * Several mutexes depend on the write lock.
- * However sometimes we want to relax the write lock while we hold
- * these mutexes, according to the release/reacquire on schedule()
- * properties of the Bkl that were used.
- * Reiserfs performances and locking were based on this scheme.
- * Now that the write lock is a mutex and not the bkl anymore, doing so
- * may result in a deadlock:
- *
- * A acquire write_lock
- * A acquire j_commit_mutex
- * A release write_lock and wait for something
- * B acquire write_lock
- * B can't acquire j_commit_mutex and sleep
- * A can't acquire write lock anymore
- * deadlock
- *
- * What we do here is avoiding such deadlock by playing the same game
- * than the Bkl: if we can't acquire a mutex that depends on the write lock,
- * we release the write lock, wait a bit and then retry.
- *
- * The mutexes concerned by this hack are:
- * - The commit mutex of a journal list
- * - The flush mutex
- * - The journal lock
- * - The inode mutex
- */
-static inline void reiserfs_mutex_lock_safe(struct mutex *m,
-			       struct super_block *s)
-{
-	reiserfs_lock_check_recursive(s);
-	reiserfs_write_unlock(s);
-	mutex_lock(m);
-	reiserfs_write_lock(s);
-}
-
-static inline void
-reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass,
-			       struct super_block *s)
-{
-	reiserfs_lock_check_recursive(s);
-	reiserfs_write_unlock(s);
-	mutex_lock_nested(m, subclass);
-	reiserfs_write_lock(s);
-}
-
-static inline void
-reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s)
-{
-	reiserfs_lock_check_recursive(s);
-	reiserfs_write_unlock(s);
-	down_read(sem);
-	reiserfs_write_lock(s);
-}
-
-/*
- * When we schedule, we usually want to also release the write lock,
- * according to the previous bkl based locking scheme of reiserfs.
- */
-static inline void reiserfs_cond_resched(struct super_block *s)
-{
-	if (need_resched()) {
-		reiserfs_write_unlock(s);
-		schedule();
-		reiserfs_write_lock(s);
-	}
-}
-
-struct fid;
-
-/* in reading the #defines, it may help to understand that they employ
-   the following abbreviations:
-
-   B = Buffer
-   I = Item header
-   H = Height within the tree (should be changed to LEV)
-   N = Number of the item in the node
-   STAT = stat data
-   DEH = Directory Entry Header
-   EC = Entry Count
-   E = Entry number
-   UL = Unsigned Long
-   BLKH = BLocK Header
-   UNFM = UNForMatted node
-   DC = Disk Child
-   P = Path
-
-   These #defines are named by concatenating these abbreviations,
-   where first comes the arguments, and last comes the return value,
-   of the macro.
-
-*/
-
-#define USE_INODE_GENERATION_COUNTER
-
-#define REISERFS_PREALLOCATE
-#define DISPLACE_NEW_PACKING_LOCALITIES
-#define PREALLOCATION_SIZE 9
-
-/* n must be power of 2 */
-#define _ROUND_UP(x,n) (((x)+(n)-1u) & ~((n)-1u))
-
-// to be ok for alpha and others we have to align structures to 8 byte
-// boundary.
-// FIXME: do not change 4 by anything else: there is code which relies on that
-#define ROUND_UP(x) _ROUND_UP(x,8LL)
-
-/* debug levels.  Right now, CONFIG_REISERFS_CHECK means print all debug
-** messages.
-*/
-#define REISERFS_DEBUG_CODE 5	/* extra messages to help find/debug errors */
-
-void __reiserfs_warning(struct super_block *s, const char *id,
-			 const char *func, const char *fmt, ...);
-#define reiserfs_warning(s, id, fmt, args...) \
-	 __reiserfs_warning(s, id, __func__, fmt, ##args)
-/* assertions handling */
-
-/** always check a condition and panic if it's false. */
-#define __RASSERT(cond, scond, format, args...)			\
-do {									\
-	if (!(cond))							\
-		reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \
-			       __FILE__ ":%i:%s: " format "\n",		\
-			       in_interrupt() ? -1 : task_pid_nr(current), \
-			       __LINE__, __func__ , ##args);		\
-} while (0)
-
-#define RASSERT(cond, format, args...) __RASSERT(cond, #cond, format, ##args)
-
-#if defined( CONFIG_REISERFS_CHECK )
-#define RFALSE(cond, format, args...) __RASSERT(!(cond), "!(" #cond ")", format, ##args)
-#else
-#define RFALSE( cond, format, args... ) do {;} while( 0 )
-#endif
-
-#define CONSTF __attribute_const__
-/*
- * Disk Data Structures
- */
-
-/***************************************************************************/
-/*                             SUPER BLOCK                                 */
-/***************************************************************************/
-
-/*
- * Structure of super block on disk, a version of which in RAM is often accessed as REISERFS_SB(s)->s_rs
- * the version in RAM is part of a larger structure containing fields never written to disk.
- */
-#define UNSET_HASH 0		// read_super will guess about, what hash names
-		     // in directories were sorted with
-#define TEA_HASH  1
-#define YURA_HASH 2
-#define R5_HASH   3
-#define DEFAULT_HASH R5_HASH
-
-struct journal_params {
-	__le32 jp_journal_1st_block;	/* where does journal start from on its
-					 * device */
-	__le32 jp_journal_dev;	/* journal device st_rdev */
-	__le32 jp_journal_size;	/* size of the journal */
-	__le32 jp_journal_trans_max;	/* max number of blocks in a transaction. */
-	__le32 jp_journal_magic;	/* random value made on fs creation (this
-					 * was sb_journal_block_count) */
-	__le32 jp_journal_max_batch;	/* max number of blocks to batch into a
-					 * trans */
-	__le32 jp_journal_max_commit_age;	/* in seconds, how old can an async
-						 * commit be */
-	__le32 jp_journal_max_trans_age;	/* in seconds, how old can a transaction
-						 * be */
-};
-
-/* this is the super from 3.5.X, where X >= 10 */
-struct reiserfs_super_block_v1 {
-	__le32 s_block_count;	/* blocks count         */
-	__le32 s_free_blocks;	/* free blocks count    */
-	__le32 s_root_block;	/* root block number    */
-	struct journal_params s_journal;
-	__le16 s_blocksize;	/* block size */
-	__le16 s_oid_maxsize;	/* max size of object id array, see
-				 * get_objectid() commentary  */
-	__le16 s_oid_cursize;	/* current size of object id array */
-	__le16 s_umount_state;	/* this is set to 1 when filesystem was
-				 * umounted, to 2 - when not */
-	char s_magic[10];	/* reiserfs magic string indicates that
-				 * file system is reiserfs:
-				 * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */
-	__le16 s_fs_state;	/* it is set to used by fsck to mark which
-				 * phase of rebuilding is done */
-	__le32 s_hash_function_code;	/* indicate, what hash function is being use
-					 * to sort names in a directory*/
-	__le16 s_tree_height;	/* height of disk tree */
-	__le16 s_bmap_nr;	/* amount of bitmap blocks needed to address
-				 * each block of file system */
-	__le16 s_version;	/* this field is only reliable on filesystem
-				 * with non-standard journal */
-	__le16 s_reserved_for_journal;	/* size in blocks of journal area on main
-					 * device, we need to keep after
-					 * making fs with non-standard journal */
-} __attribute__ ((__packed__));
-
-#define SB_SIZE_V1 (sizeof(struct reiserfs_super_block_v1))
-
-/* this is the on disk super block */
-struct reiserfs_super_block {
-	struct reiserfs_super_block_v1 s_v1;
-	__le32 s_inode_generation;
-	__le32 s_flags;		/* Right now used only by inode-attributes, if enabled */
-	unsigned char s_uuid[16];	/* filesystem unique identifier */
-	unsigned char s_label[16];	/* filesystem volume label */
-	__le16 s_mnt_count;		/* Count of mounts since last fsck */
-	__le16 s_max_mnt_count;		/* Maximum mounts before check */
-	__le32 s_lastcheck;		/* Timestamp of last fsck */
-	__le32 s_check_interval;	/* Interval between checks */
-	char s_unused[76];	/* zero filled by mkreiserfs and
-				 * reiserfs_convert_objectid_map_v1()
-				 * so any additions must be updated
-				 * there as well. */
-} __attribute__ ((__packed__));
-
-#define SB_SIZE (sizeof(struct reiserfs_super_block))
-
-#define REISERFS_VERSION_1 0
-#define REISERFS_VERSION_2 2
-
-// on-disk super block fields converted to cpu form
-#define SB_DISK_SUPER_BLOCK(s) (REISERFS_SB(s)->s_rs)
-#define SB_V1_DISK_SUPER_BLOCK(s) (&(SB_DISK_SUPER_BLOCK(s)->s_v1))
-#define SB_BLOCKSIZE(s) \
-        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_blocksize))
-#define SB_BLOCK_COUNT(s) \
-        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_block_count))
-#define SB_FREE_BLOCKS(s) \
-        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks))
-#define SB_REISERFS_MAGIC(s) \
-        (SB_V1_DISK_SUPER_BLOCK(s)->s_magic)
-#define SB_ROOT_BLOCK(s) \
-        le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_root_block))
-#define SB_TREE_HEIGHT(s) \
-        le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height))
-#define SB_REISERFS_STATE(s) \
-        le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state))
-#define SB_VERSION(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_version))
-#define SB_BMAP_NR(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr))
-
-#define PUT_SB_BLOCK_COUNT(s, val) \
-   do { SB_V1_DISK_SUPER_BLOCK(s)->s_block_count = cpu_to_le32(val); } while (0)
-#define PUT_SB_FREE_BLOCKS(s, val) \
-   do { SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks = cpu_to_le32(val); } while (0)
-#define PUT_SB_ROOT_BLOCK(s, val) \
-   do { SB_V1_DISK_SUPER_BLOCK(s)->s_root_block = cpu_to_le32(val); } while (0)
-#define PUT_SB_TREE_HEIGHT(s, val) \
-   do { SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height = cpu_to_le16(val); } while (0)
-#define PUT_SB_REISERFS_STATE(s, val) \
-   do { SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state = cpu_to_le16(val); } while (0)
-#define PUT_SB_VERSION(s, val) \
-   do { SB_V1_DISK_SUPER_BLOCK(s)->s_version = cpu_to_le16(val); } while (0)
-#define PUT_SB_BMAP_NR(s, val) \
-   do { SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr = cpu_to_le16 (val); } while (0)
-
-#define SB_ONDISK_JP(s) (&SB_V1_DISK_SUPER_BLOCK(s)->s_journal)
-#define SB_ONDISK_JOURNAL_SIZE(s) \
-         le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_size))
-#define SB_ONDISK_JOURNAL_1st_BLOCK(s) \
-         le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_1st_block))
-#define SB_ONDISK_JOURNAL_DEVICE(s) \
-         le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_dev))
-#define SB_ONDISK_RESERVED_FOR_JOURNAL(s) \
-         le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_reserved_for_journal))
-
-#define is_block_in_log_or_reserved_area(s, block) \
-         block >= SB_JOURNAL_1st_RESERVED_BLOCK(s) \
-         && block < SB_JOURNAL_1st_RESERVED_BLOCK(s) +  \
-         ((!is_reiserfs_jr(SB_DISK_SUPER_BLOCK(s)) ? \
-         SB_ONDISK_JOURNAL_SIZE(s) + 1 : SB_ONDISK_RESERVED_FOR_JOURNAL(s)))
-
-int is_reiserfs_3_5(struct reiserfs_super_block *rs);
-int is_reiserfs_3_6(struct reiserfs_super_block *rs);
-int is_reiserfs_jr(struct reiserfs_super_block *rs);
-
-/* ReiserFS leaves the first 64k unused, so that partition labels have
-   enough space.  If someone wants to write a fancy bootloader that
-   needs more than 64k, let us know, and this will be increased in size.
-   This number must be larger than than the largest block size on any
-   platform, or code will break.  -Hans */
-#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
-#define REISERFS_FIRST_BLOCK unused_define
-#define REISERFS_JOURNAL_OFFSET_IN_BYTES REISERFS_DISK_OFFSET_IN_BYTES
-
-/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */
-#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024)
-
-/* reiserfs internal error code (used by search_by_key and fix_nodes)) */
-#define CARRY_ON      0
-#define REPEAT_SEARCH -1
-#define IO_ERROR      -2
-#define NO_DISK_SPACE -3
-#define NO_BALANCING_NEEDED  (-4)
-#define NO_MORE_UNUSED_CONTIGUOUS_BLOCKS (-5)
-#define QUOTA_EXCEEDED -6
-
-typedef __u32 b_blocknr_t;
-typedef __le32 unp_t;
-
-struct unfm_nodeinfo {
-	unp_t unfm_nodenum;
-	unsigned short unfm_freespace;
-};
-
-/* there are two formats of keys: 3.5 and 3.6
- */
-#define KEY_FORMAT_3_5 0
-#define KEY_FORMAT_3_6 1
-
-/* there are two stat datas */
-#define STAT_DATA_V1 0
-#define STAT_DATA_V2 1
-
-static inline struct reiserfs_inode_info *REISERFS_I(const struct inode *inode)
-{
-	return container_of(inode, struct reiserfs_inode_info, vfs_inode);
-}
-
-static inline struct reiserfs_sb_info *REISERFS_SB(const struct super_block *sb)
-{
-	return sb->s_fs_info;
-}
-
-/* Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16
- * which overflows on large file systems. */
-static inline __u32 reiserfs_bmap_count(struct super_block *sb)
-{
-	return (SB_BLOCK_COUNT(sb) - 1) / (sb->s_blocksize * 8) + 1;
-}
-
-static inline int bmap_would_wrap(unsigned bmap_nr)
-{
-	return bmap_nr > ((1LL << 16) - 1);
-}
-
-/** this says about version of key of all items (but stat data) the
-    object consists of */
-#define get_inode_item_key_version( inode )                                    \
-    ((REISERFS_I(inode)->i_flags & i_item_key_version_mask) ? KEY_FORMAT_3_6 : KEY_FORMAT_3_5)
-
-#define set_inode_item_key_version( inode, version )                           \
-         ({ if((version)==KEY_FORMAT_3_6)                                      \
-                REISERFS_I(inode)->i_flags |= i_item_key_version_mask;      \
-            else                                                               \
-                REISERFS_I(inode)->i_flags &= ~i_item_key_version_mask; })
-
-#define get_inode_sd_version(inode)                                            \
-    ((REISERFS_I(inode)->i_flags & i_stat_data_version_mask) ? STAT_DATA_V2 : STAT_DATA_V1)
-
-#define set_inode_sd_version(inode, version)                                   \
-         ({ if((version)==STAT_DATA_V2)                                        \
-                REISERFS_I(inode)->i_flags |= i_stat_data_version_mask;     \
-            else                                                               \
-                REISERFS_I(inode)->i_flags &= ~i_stat_data_version_mask; })
-
-/* This is an aggressive tail suppression policy, I am hoping it
-   improves our benchmarks. The principle behind it is that percentage
-   space saving is what matters, not absolute space saving.  This is
-   non-intuitive, but it helps to understand it if you consider that the
-   cost to access 4 blocks is not much more than the cost to access 1
-   block, if you have to do a seek and rotate.  A tail risks a
-   non-linear disk access that is significant as a percentage of total
-   time cost for a 4 block file and saves an amount of space that is
-   less significant as a percentage of space, or so goes the hypothesis.
-   -Hans */
-#define STORE_TAIL_IN_UNFM_S1(n_file_size,n_tail_size,n_block_size) \
-(\
-  (!(n_tail_size)) || \
-  (((n_tail_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) || \
-   ( (n_file_size) >= (n_block_size) * 4 ) || \
-   ( ( (n_file_size) >= (n_block_size) * 3 ) && \
-     ( (n_tail_size) >=   (MAX_DIRECT_ITEM_LEN(n_block_size))/4) ) || \
-   ( ( (n_file_size) >= (n_block_size) * 2 ) && \
-     ( (n_tail_size) >=   (MAX_DIRECT_ITEM_LEN(n_block_size))/2) ) || \
-   ( ( (n_file_size) >= (n_block_size) ) && \
-     ( (n_tail_size) >=   (MAX_DIRECT_ITEM_LEN(n_block_size) * 3)/4) ) ) \
-)
-
-/* Another strategy for tails, this one means only create a tail if all the
-   file would fit into one DIRECT item.
-   Primary intention for this one is to increase performance by decreasing
-   seeking.
-*/
-#define STORE_TAIL_IN_UNFM_S2(n_file_size,n_tail_size,n_block_size) \
-(\
-  (!(n_tail_size)) || \
-  (((n_file_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) ) \
-)
-
-/*
- * values for s_umount_state field
- */
-#define REISERFS_VALID_FS    1
-#define REISERFS_ERROR_FS    2
-
-//
-// there are 5 item types currently
-//
-#define TYPE_STAT_DATA 0
-#define TYPE_INDIRECT 1
-#define TYPE_DIRECT 2
-#define TYPE_DIRENTRY 3
-#define TYPE_MAXTYPE 3
-#define TYPE_ANY 15		// FIXME: comment is required
-
-/***************************************************************************/
-/*                       KEY & ITEM HEAD                                   */
-/***************************************************************************/
-
-//
-// directories use this key as well as old files
-//
-struct offset_v1 {
-	__le32 k_offset;
-	__le32 k_uniqueness;
-} __attribute__ ((__packed__));
-
-struct offset_v2 {
-	__le64 v;
-} __attribute__ ((__packed__));
-
-static inline __u16 offset_v2_k_type(const struct offset_v2 *v2)
-{
-	__u8 type = le64_to_cpu(v2->v) >> 60;
-	return (type <= TYPE_MAXTYPE) ? type : TYPE_ANY;
-}
-
-static inline void set_offset_v2_k_type(struct offset_v2 *v2, int type)
-{
-	v2->v =
-	    (v2->v & cpu_to_le64(~0ULL >> 4)) | cpu_to_le64((__u64) type << 60);
-}
-
-static inline loff_t offset_v2_k_offset(const struct offset_v2 *v2)
-{
-	return le64_to_cpu(v2->v) & (~0ULL >> 4);
-}
-
-static inline void set_offset_v2_k_offset(struct offset_v2 *v2, loff_t offset)
-{
-	offset &= (~0ULL >> 4);
-	v2->v = (v2->v & cpu_to_le64(15ULL << 60)) | cpu_to_le64(offset);
-}
-
-/* Key of an item determines its location in the S+tree, and
-   is composed of 4 components */
-struct reiserfs_key {
-	__le32 k_dir_id;	/* packing locality: by default parent
-				   directory object id */
-	__le32 k_objectid;	/* object identifier */
-	union {
-		struct offset_v1 k_offset_v1;
-		struct offset_v2 k_offset_v2;
-	} __attribute__ ((__packed__)) u;
-} __attribute__ ((__packed__));
-
-struct in_core_key {
-	__u32 k_dir_id;		/* packing locality: by default parent
-				   directory object id */
-	__u32 k_objectid;	/* object identifier */
-	__u64 k_offset;
-	__u8 k_type;
-};
-
-struct cpu_key {
-	struct in_core_key on_disk_key;
-	int version;
-	int key_length;		/* 3 in all cases but direct2indirect and
-				   indirect2direct conversion */
-};
-
-/* Our function for comparing keys can compare keys of different
-   lengths.  It takes as a parameter the length of the keys it is to
-   compare.  These defines are used in determining what is to be passed
-   to it as that parameter. */
-#define REISERFS_FULL_KEY_LEN     4
-#define REISERFS_SHORT_KEY_LEN    2
-
-/* The result of the key compare */
-#define FIRST_GREATER 1
-#define SECOND_GREATER -1
-#define KEYS_IDENTICAL 0
-#define KEY_FOUND 1
-#define KEY_NOT_FOUND 0
-
-#define KEY_SIZE (sizeof(struct reiserfs_key))
-#define SHORT_KEY_SIZE (sizeof (__u32) + sizeof (__u32))
-
-/* return values for search_by_key and clones */
-#define ITEM_FOUND 1
-#define ITEM_NOT_FOUND 0
-#define ENTRY_FOUND 1
-#define ENTRY_NOT_FOUND 0
-#define DIRECTORY_NOT_FOUND -1
-#define REGULAR_FILE_FOUND -2
-#define DIRECTORY_FOUND -3
-#define BYTE_FOUND 1
-#define BYTE_NOT_FOUND 0
-#define FILE_NOT_FOUND -1
-
-#define POSITION_FOUND 1
-#define POSITION_NOT_FOUND 0
-
-// return values for reiserfs_find_entry and search_by_entry_key
-#define NAME_FOUND 1
-#define NAME_NOT_FOUND 0
-#define GOTO_PREVIOUS_ITEM 2
-#define NAME_FOUND_INVISIBLE 3
-
-/*  Everything in the filesystem is stored as a set of items.  The
-    item head contains the key of the item, its free space (for
-    indirect items) and specifies the location of the item itself
-    within the block.  */
-
-struct item_head {
-	/* Everything in the tree is found by searching for it based on
-	 * its key.*/
-	struct reiserfs_key ih_key;
-	union {
-		/* The free space in the last unformatted node of an
-		   indirect item if this is an indirect item.  This
-		   equals 0xFFFF iff this is a direct item or stat data
-		   item. Note that the key, not this field, is used to
-		   determine the item type, and thus which field this
-		   union contains. */
-		__le16 ih_free_space_reserved;
-		/* Iff this is a directory item, this field equals the
-		   number of directory entries in the directory item. */
-		__le16 ih_entry_count;
-	} __attribute__ ((__packed__)) u;
-	__le16 ih_item_len;	/* total size of the item body */
-	__le16 ih_item_location;	/* an offset to the item body
-					 * within the block */
-	__le16 ih_version;	/* 0 for all old items, 2 for new
-				   ones. Highest bit is set by fsck
-				   temporary, cleaned after all
-				   done */
-} __attribute__ ((__packed__));
-/* size of item header     */
-#define IH_SIZE (sizeof(struct item_head))
-
-#define ih_free_space(ih)            le16_to_cpu((ih)->u.ih_free_space_reserved)
-#define ih_version(ih)               le16_to_cpu((ih)->ih_version)
-#define ih_entry_count(ih)           le16_to_cpu((ih)->u.ih_entry_count)
-#define ih_location(ih)              le16_to_cpu((ih)->ih_item_location)
-#define ih_item_len(ih)              le16_to_cpu((ih)->ih_item_len)
-
-#define put_ih_free_space(ih, val)   do { (ih)->u.ih_free_space_reserved = cpu_to_le16(val); } while(0)
-#define put_ih_version(ih, val)      do { (ih)->ih_version = cpu_to_le16(val); } while (0)
-#define put_ih_entry_count(ih, val)  do { (ih)->u.ih_entry_count = cpu_to_le16(val); } while (0)
-#define put_ih_location(ih, val)     do { (ih)->ih_item_location = cpu_to_le16(val); } while (0)
-#define put_ih_item_len(ih, val)     do { (ih)->ih_item_len = cpu_to_le16(val); } while (0)
-
-#define unreachable_item(ih) (ih_version(ih) & (1 << 15))
-
-#define get_ih_free_space(ih) (ih_version (ih) == KEY_FORMAT_3_6 ? 0 : ih_free_space (ih))
-#define set_ih_free_space(ih,val) put_ih_free_space((ih), ((ih_version(ih) == KEY_FORMAT_3_6) ? 0 : (val)))
-
-/* these operate on indirect items, where you've got an array of ints
-** at a possibly unaligned location.  These are a noop on ia32
-** 
-** p is the array of __u32, i is the index into the array, v is the value
-** to store there.
-*/
-#define get_block_num(p, i) get_unaligned_le32((p) + (i))
-#define put_block_num(p, i, v) put_unaligned_le32((v), (p) + (i))
-
-//
-// in old version uniqueness field shows key type
-//
-#define V1_SD_UNIQUENESS 0
-#define V1_INDIRECT_UNIQUENESS 0xfffffffe
-#define V1_DIRECT_UNIQUENESS 0xffffffff
-#define V1_DIRENTRY_UNIQUENESS 500
-#define V1_ANY_UNIQUENESS 555	// FIXME: comment is required
-
-//
-// here are conversion routines
-//
-static inline int uniqueness2type(__u32 uniqueness) CONSTF;
-static inline int uniqueness2type(__u32 uniqueness)
-{
-	switch ((int)uniqueness) {
-	case V1_SD_UNIQUENESS:
-		return TYPE_STAT_DATA;
-	case V1_INDIRECT_UNIQUENESS:
-		return TYPE_INDIRECT;
-	case V1_DIRECT_UNIQUENESS:
-		return TYPE_DIRECT;
-	case V1_DIRENTRY_UNIQUENESS:
-		return TYPE_DIRENTRY;
-	case V1_ANY_UNIQUENESS:
-	default:
-		return TYPE_ANY;
-	}
-}
-
-static inline __u32 type2uniqueness(int type) CONSTF;
-static inline __u32 type2uniqueness(int type)
-{
-	switch (type) {
-	case TYPE_STAT_DATA:
-		return V1_SD_UNIQUENESS;
-	case TYPE_INDIRECT:
-		return V1_INDIRECT_UNIQUENESS;
-	case TYPE_DIRECT:
-		return V1_DIRECT_UNIQUENESS;
-	case TYPE_DIRENTRY:
-		return V1_DIRENTRY_UNIQUENESS;
-	case TYPE_ANY:
-	default:
-		return V1_ANY_UNIQUENESS;
-	}
-}
-
-//
-// key is pointer to on disk key which is stored in le, result is cpu,
-// there is no way to get version of object from key, so, provide
-// version to these defines
-//
-static inline loff_t le_key_k_offset(int version,
-				     const struct reiserfs_key *key)
-{
-	return (version == KEY_FORMAT_3_5) ?
-	    le32_to_cpu(key->u.k_offset_v1.k_offset) :
-	    offset_v2_k_offset(&(key->u.k_offset_v2));
-}
-
-static inline loff_t le_ih_k_offset(const struct item_head *ih)
-{
-	return le_key_k_offset(ih_version(ih), &(ih->ih_key));
-}
-
-static inline loff_t le_key_k_type(int version, const struct reiserfs_key *key)
-{
-	return (version == KEY_FORMAT_3_5) ?
-	    uniqueness2type(le32_to_cpu(key->u.k_offset_v1.k_uniqueness)) :
-	    offset_v2_k_type(&(key->u.k_offset_v2));
-}
-
-static inline loff_t le_ih_k_type(const struct item_head *ih)
-{
-	return le_key_k_type(ih_version(ih), &(ih->ih_key));
-}
-
-static inline void set_le_key_k_offset(int version, struct reiserfs_key *key,
-				       loff_t offset)
-{
-	(version == KEY_FORMAT_3_5) ? (void)(key->u.k_offset_v1.k_offset = cpu_to_le32(offset)) :	/* jdm check */
-	    (void)(set_offset_v2_k_offset(&(key->u.k_offset_v2), offset));
-}
-
-static inline void set_le_ih_k_offset(struct item_head *ih, loff_t offset)
-{
-	set_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset);
-}
-
-static inline void set_le_key_k_type(int version, struct reiserfs_key *key,
-				     int type)
-{
-	(version == KEY_FORMAT_3_5) ?
-	    (void)(key->u.k_offset_v1.k_uniqueness =
-		   cpu_to_le32(type2uniqueness(type)))
-	    : (void)(set_offset_v2_k_type(&(key->u.k_offset_v2), type));
-}
-
-static inline void set_le_ih_k_type(struct item_head *ih, int type)
-{
-	set_le_key_k_type(ih_version(ih), &(ih->ih_key), type);
-}
-
-static inline int is_direntry_le_key(int version, struct reiserfs_key *key)
-{
-	return le_key_k_type(version, key) == TYPE_DIRENTRY;
-}
-
-static inline int is_direct_le_key(int version, struct reiserfs_key *key)
-{
-	return le_key_k_type(version, key) == TYPE_DIRECT;
-}
-
-static inline int is_indirect_le_key(int version, struct reiserfs_key *key)
-{
-	return le_key_k_type(version, key) == TYPE_INDIRECT;
-}
-
-static inline int is_statdata_le_key(int version, struct reiserfs_key *key)
-{
-	return le_key_k_type(version, key) == TYPE_STAT_DATA;
-}
-
-//
-// item header has version.
-//
-static inline int is_direntry_le_ih(struct item_head *ih)
-{
-	return is_direntry_le_key(ih_version(ih), &ih->ih_key);
-}
-
-static inline int is_direct_le_ih(struct item_head *ih)
-{
-	return is_direct_le_key(ih_version(ih), &ih->ih_key);
-}
-
-static inline int is_indirect_le_ih(struct item_head *ih)
-{
-	return is_indirect_le_key(ih_version(ih), &ih->ih_key);
-}
-
-static inline int is_statdata_le_ih(struct item_head *ih)
-{
-	return is_statdata_le_key(ih_version(ih), &ih->ih_key);
-}
-
-//
-// key is pointer to cpu key, result is cpu
-//
-static inline loff_t cpu_key_k_offset(const struct cpu_key *key)
-{
-	return key->on_disk_key.k_offset;
-}
-
-static inline loff_t cpu_key_k_type(const struct cpu_key *key)
-{
-	return key->on_disk_key.k_type;
-}
-
-static inline void set_cpu_key_k_offset(struct cpu_key *key, loff_t offset)
-{
-	key->on_disk_key.k_offset = offset;
-}
-
-static inline void set_cpu_key_k_type(struct cpu_key *key, int type)
-{
-	key->on_disk_key.k_type = type;
-}
-
-static inline void cpu_key_k_offset_dec(struct cpu_key *key)
-{
-	key->on_disk_key.k_offset--;
-}
-
-#define is_direntry_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRENTRY)
-#define is_direct_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRECT)
-#define is_indirect_cpu_key(key) (cpu_key_k_type (key) == TYPE_INDIRECT)
-#define is_statdata_cpu_key(key) (cpu_key_k_type (key) == TYPE_STAT_DATA)
-
-/* are these used ? */
-#define is_direntry_cpu_ih(ih) (is_direntry_cpu_key (&((ih)->ih_key)))
-#define is_direct_cpu_ih(ih) (is_direct_cpu_key (&((ih)->ih_key)))
-#define is_indirect_cpu_ih(ih) (is_indirect_cpu_key (&((ih)->ih_key)))
-#define is_statdata_cpu_ih(ih) (is_statdata_cpu_key (&((ih)->ih_key)))
-
-#define I_K_KEY_IN_ITEM(ih, key, n_blocksize) \
-    (!COMP_SHORT_KEYS(ih, key) && \
-	  I_OFF_BYTE_IN_ITEM(ih, k_offset(key), n_blocksize))
-
-/* maximal length of item */
-#define MAX_ITEM_LEN(block_size) (block_size - BLKH_SIZE - IH_SIZE)
-#define MIN_ITEM_LEN 1
-
-/* object identifier for root dir */
-#define REISERFS_ROOT_OBJECTID 2
-#define REISERFS_ROOT_PARENT_OBJECTID 1
-
-extern struct reiserfs_key root_key;
-
-/* 
- * Picture represents a leaf of the S+tree
- *  ______________________________________________________
- * |      |  Array of     |                   |           |
- * |Block |  Object-Item  |      F r e e      |  Objects- |
- * | head |  Headers      |     S p a c e     |   Items   |
- * |______|_______________|___________________|___________|
- */
-
-/* Header of a disk block.  More precisely, header of a formatted leaf
-   or internal node, and not the header of an unformatted node. */
-struct block_head {
-	__le16 blk_level;	/* Level of a block in the tree. */
-	__le16 blk_nr_item;	/* Number of keys/items in a block. */
-	__le16 blk_free_space;	/* Block free space in bytes. */
-	__le16 blk_reserved;
-	/* dump this in v4/planA */
-	struct reiserfs_key blk_right_delim_key;	/* kept only for compatibility */
-};
-
-#define BLKH_SIZE                     (sizeof(struct block_head))
-#define blkh_level(p_blkh)            (le16_to_cpu((p_blkh)->blk_level))
-#define blkh_nr_item(p_blkh)          (le16_to_cpu((p_blkh)->blk_nr_item))
-#define blkh_free_space(p_blkh)       (le16_to_cpu((p_blkh)->blk_free_space))
-#define blkh_reserved(p_blkh)         (le16_to_cpu((p_blkh)->blk_reserved))
-#define set_blkh_level(p_blkh,val)    ((p_blkh)->blk_level = cpu_to_le16(val))
-#define set_blkh_nr_item(p_blkh,val)  ((p_blkh)->blk_nr_item = cpu_to_le16(val))
-#define set_blkh_free_space(p_blkh,val) ((p_blkh)->blk_free_space = cpu_to_le16(val))
-#define set_blkh_reserved(p_blkh,val) ((p_blkh)->blk_reserved = cpu_to_le16(val))
-#define blkh_right_delim_key(p_blkh)  ((p_blkh)->blk_right_delim_key)
-#define set_blkh_right_delim_key(p_blkh,val)  ((p_blkh)->blk_right_delim_key = val)
-
-/*
- * values for blk_level field of the struct block_head
- */
-
-#define FREE_LEVEL 0		/* when node gets removed from the tree its
-				   blk_level is set to FREE_LEVEL. It is then
-				   used to see whether the node is still in the
-				   tree */
-
-#define DISK_LEAF_NODE_LEVEL  1	/* Leaf node level. */
-
-/* Given the buffer head of a formatted node, resolve to the block head of that node. */
-#define B_BLK_HEAD(bh)			((struct block_head *)((bh)->b_data))
-/* Number of items that are in buffer. */
-#define B_NR_ITEMS(bh)			(blkh_nr_item(B_BLK_HEAD(bh)))
-#define B_LEVEL(bh)			(blkh_level(B_BLK_HEAD(bh)))
-#define B_FREE_SPACE(bh)		(blkh_free_space(B_BLK_HEAD(bh)))
-
-#define PUT_B_NR_ITEMS(bh, val)		do { set_blkh_nr_item(B_BLK_HEAD(bh), val); } while (0)
-#define PUT_B_LEVEL(bh, val)		do { set_blkh_level(B_BLK_HEAD(bh), val); } while (0)
-#define PUT_B_FREE_SPACE(bh, val)	do { set_blkh_free_space(B_BLK_HEAD(bh), val); } while (0)
-
-/* Get right delimiting key. -- little endian */
-#define B_PRIGHT_DELIM_KEY(bh)		(&(blk_right_delim_key(B_BLK_HEAD(bh))))
-
-/* Does the buffer contain a disk leaf. */
-#define B_IS_ITEMS_LEVEL(bh)		(B_LEVEL(bh) == DISK_LEAF_NODE_LEVEL)
-
-/* Does the buffer contain a disk internal node */
-#define B_IS_KEYS_LEVEL(bh)      (B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL \
-					    && B_LEVEL(bh) <= MAX_HEIGHT)
-
-/***************************************************************************/
-/*                             STAT DATA                                   */
-/***************************************************************************/
-
-//
-// old stat data is 32 bytes long. We are going to distinguish new one by
-// different size
-//
-struct stat_data_v1 {
-	__le16 sd_mode;		/* file type, permissions */
-	__le16 sd_nlink;	/* number of hard links */
-	__le16 sd_uid;		/* owner */
-	__le16 sd_gid;		/* group */
-	__le32 sd_size;		/* file size */
-	__le32 sd_atime;	/* time of last access */
-	__le32 sd_mtime;	/* time file was last modified  */
-	__le32 sd_ctime;	/* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
-	union {
-		__le32 sd_rdev;
-		__le32 sd_blocks;	/* number of blocks file uses */
-	} __attribute__ ((__packed__)) u;
-	__le32 sd_first_direct_byte;	/* first byte of file which is stored
-					   in a direct item: except that if it
-					   equals 1 it is a symlink and if it
-					   equals ~(__u32)0 there is no
-					   direct item.  The existence of this
-					   field really grates on me. Let's
-					   replace it with a macro based on
-					   sd_size and our tail suppression
-					   policy.  Someday.  -Hans */
-} __attribute__ ((__packed__));
-
-#define SD_V1_SIZE              (sizeof(struct stat_data_v1))
-#define stat_data_v1(ih)        (ih_version (ih) == KEY_FORMAT_3_5)
-#define sd_v1_mode(sdp)         (le16_to_cpu((sdp)->sd_mode))
-#define set_sd_v1_mode(sdp,v)   ((sdp)->sd_mode = cpu_to_le16(v))
-#define sd_v1_nlink(sdp)        (le16_to_cpu((sdp)->sd_nlink))
-#define set_sd_v1_nlink(sdp,v)  ((sdp)->sd_nlink = cpu_to_le16(v))
-#define sd_v1_uid(sdp)          (le16_to_cpu((sdp)->sd_uid))
-#define set_sd_v1_uid(sdp,v)    ((sdp)->sd_uid = cpu_to_le16(v))
-#define sd_v1_gid(sdp)          (le16_to_cpu((sdp)->sd_gid))
-#define set_sd_v1_gid(sdp,v)    ((sdp)->sd_gid = cpu_to_le16(v))
-#define sd_v1_size(sdp)         (le32_to_cpu((sdp)->sd_size))
-#define set_sd_v1_size(sdp,v)   ((sdp)->sd_size = cpu_to_le32(v))
-#define sd_v1_atime(sdp)        (le32_to_cpu((sdp)->sd_atime))
-#define set_sd_v1_atime(sdp,v)  ((sdp)->sd_atime = cpu_to_le32(v))
-#define sd_v1_mtime(sdp)        (le32_to_cpu((sdp)->sd_mtime))
-#define set_sd_v1_mtime(sdp,v)  ((sdp)->sd_mtime = cpu_to_le32(v))
-#define sd_v1_ctime(sdp)        (le32_to_cpu((sdp)->sd_ctime))
-#define set_sd_v1_ctime(sdp,v)  ((sdp)->sd_ctime = cpu_to_le32(v))
-#define sd_v1_rdev(sdp)         (le32_to_cpu((sdp)->u.sd_rdev))
-#define set_sd_v1_rdev(sdp,v)   ((sdp)->u.sd_rdev = cpu_to_le32(v))
-#define sd_v1_blocks(sdp)       (le32_to_cpu((sdp)->u.sd_blocks))
-#define set_sd_v1_blocks(sdp,v) ((sdp)->u.sd_blocks = cpu_to_le32(v))
-#define sd_v1_first_direct_byte(sdp) \
-                                (le32_to_cpu((sdp)->sd_first_direct_byte))
-#define set_sd_v1_first_direct_byte(sdp,v) \
-                                ((sdp)->sd_first_direct_byte = cpu_to_le32(v))
-
-/* inode flags stored in sd_attrs (nee sd_reserved) */
-
-/* we want common flags to have the same values as in ext2,
-   so chattr(1) will work without problems */
-#define REISERFS_IMMUTABLE_FL FS_IMMUTABLE_FL
-#define REISERFS_APPEND_FL    FS_APPEND_FL
-#define REISERFS_SYNC_FL      FS_SYNC_FL
-#define REISERFS_NOATIME_FL   FS_NOATIME_FL
-#define REISERFS_NODUMP_FL    FS_NODUMP_FL
-#define REISERFS_SECRM_FL     FS_SECRM_FL
-#define REISERFS_UNRM_FL      FS_UNRM_FL
-#define REISERFS_COMPR_FL     FS_COMPR_FL
-#define REISERFS_NOTAIL_FL    FS_NOTAIL_FL
-
-/* persistent flags that file inherits from the parent directory */
-#define REISERFS_INHERIT_MASK ( REISERFS_IMMUTABLE_FL |	\
-				REISERFS_SYNC_FL |	\
-				REISERFS_NOATIME_FL |	\
-				REISERFS_NODUMP_FL |	\
-				REISERFS_SECRM_FL |	\
-				REISERFS_COMPR_FL |	\
-				REISERFS_NOTAIL_FL )
-
-/* Stat Data on disk (reiserfs version of UFS disk inode minus the
-   address blocks) */
-struct stat_data {
-	__le16 sd_mode;		/* file type, permissions */
-	__le16 sd_attrs;	/* persistent inode flags */
-	__le32 sd_nlink;	/* number of hard links */
-	__le64 sd_size;		/* file size */
-	__le32 sd_uid;		/* owner */
-	__le32 sd_gid;		/* group */
-	__le32 sd_atime;	/* time of last access */
-	__le32 sd_mtime;	/* time file was last modified  */
-	__le32 sd_ctime;	/* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
-	__le32 sd_blocks;
-	union {
-		__le32 sd_rdev;
-		__le32 sd_generation;
-		//__le32 sd_first_direct_byte;
-		/* first byte of file which is stored in a
-		   direct item: except that if it equals 1
-		   it is a symlink and if it equals
-		   ~(__u32)0 there is no direct item.  The
-		   existence of this field really grates
-		   on me. Let's replace it with a macro
-		   based on sd_size and our tail
-		   suppression policy? */
-	} __attribute__ ((__packed__)) u;
-} __attribute__ ((__packed__));
-//
-// this is 44 bytes long
-//
-#define SD_SIZE (sizeof(struct stat_data))
-#define SD_V2_SIZE              SD_SIZE
-#define stat_data_v2(ih)        (ih_version (ih) == KEY_FORMAT_3_6)
-#define sd_v2_mode(sdp)         (le16_to_cpu((sdp)->sd_mode))
-#define set_sd_v2_mode(sdp,v)   ((sdp)->sd_mode = cpu_to_le16(v))
-/* sd_reserved */
-/* set_sd_reserved */
-#define sd_v2_nlink(sdp)        (le32_to_cpu((sdp)->sd_nlink))
-#define set_sd_v2_nlink(sdp,v)  ((sdp)->sd_nlink = cpu_to_le32(v))
-#define sd_v2_size(sdp)         (le64_to_cpu((sdp)->sd_size))
-#define set_sd_v2_size(sdp,v)   ((sdp)->sd_size = cpu_to_le64(v))
-#define sd_v2_uid(sdp)          (le32_to_cpu((sdp)->sd_uid))
-#define set_sd_v2_uid(sdp,v)    ((sdp)->sd_uid = cpu_to_le32(v))
-#define sd_v2_gid(sdp)          (le32_to_cpu((sdp)->sd_gid))
-#define set_sd_v2_gid(sdp,v)    ((sdp)->sd_gid = cpu_to_le32(v))
-#define sd_v2_atime(sdp)        (le32_to_cpu((sdp)->sd_atime))
-#define set_sd_v2_atime(sdp,v)  ((sdp)->sd_atime = cpu_to_le32(v))
-#define sd_v2_mtime(sdp)        (le32_to_cpu((sdp)->sd_mtime))
-#define set_sd_v2_mtime(sdp,v)  ((sdp)->sd_mtime = cpu_to_le32(v))
-#define sd_v2_ctime(sdp)        (le32_to_cpu((sdp)->sd_ctime))
-#define set_sd_v2_ctime(sdp,v)  ((sdp)->sd_ctime = cpu_to_le32(v))
-#define sd_v2_blocks(sdp)       (le32_to_cpu((sdp)->sd_blocks))
-#define set_sd_v2_blocks(sdp,v) ((sdp)->sd_blocks = cpu_to_le32(v))
-#define sd_v2_rdev(sdp)         (le32_to_cpu((sdp)->u.sd_rdev))
-#define set_sd_v2_rdev(sdp,v)   ((sdp)->u.sd_rdev = cpu_to_le32(v))
-#define sd_v2_generation(sdp)   (le32_to_cpu((sdp)->u.sd_generation))
-#define set_sd_v2_generation(sdp,v) ((sdp)->u.sd_generation = cpu_to_le32(v))
-#define sd_v2_attrs(sdp)         (le16_to_cpu((sdp)->sd_attrs))
-#define set_sd_v2_attrs(sdp,v)   ((sdp)->sd_attrs = cpu_to_le16(v))
-
-/***************************************************************************/
-/*                      DIRECTORY STRUCTURE                                */
-/***************************************************************************/
-/* 
-   Picture represents the structure of directory items
-   ________________________________________________
-   |  Array of     |   |     |        |       |   |
-   | directory     |N-1| N-2 | ....   |   1st |0th|
-   | entry headers |   |     |        |       |   |
-   |_______________|___|_____|________|_______|___|
-                    <----   directory entries         ------>
-
- First directory item has k_offset component 1. We store "." and ".."
- in one item, always, we never split "." and ".." into differing
- items.  This makes, among other things, the code for removing
- directories simpler. */
-#define SD_OFFSET  0
-#define SD_UNIQUENESS 0
-#define DOT_OFFSET 1
-#define DOT_DOT_OFFSET 2
-#define DIRENTRY_UNIQUENESS 500
-
-/* */
-#define FIRST_ITEM_OFFSET 1
-
-/*
-   Q: How to get key of object pointed to by entry from entry?  
-
-   A: Each directory entry has its header. This header has deh_dir_id and deh_objectid fields, those are key
-      of object, entry points to */
-
-/* NOT IMPLEMENTED:   
-   Directory will someday contain stat data of object */
-
-struct reiserfs_de_head {
-	__le32 deh_offset;	/* third component of the directory entry key */
-	__le32 deh_dir_id;	/* objectid of the parent directory of the object, that is referenced
-				   by directory entry */
-	__le32 deh_objectid;	/* objectid of the object, that is referenced by directory entry */
-	__le16 deh_location;	/* offset of name in the whole item */
-	__le16 deh_state;	/* whether 1) entry contains stat data (for future), and 2) whether
-				   entry is hidden (unlinked) */
-} __attribute__ ((__packed__));
-#define DEH_SIZE                  sizeof(struct reiserfs_de_head)
-#define deh_offset(p_deh)         (le32_to_cpu((p_deh)->deh_offset))
-#define deh_dir_id(p_deh)         (le32_to_cpu((p_deh)->deh_dir_id))
-#define deh_objectid(p_deh)       (le32_to_cpu((p_deh)->deh_objectid))
-#define deh_location(p_deh)       (le16_to_cpu((p_deh)->deh_location))
-#define deh_state(p_deh)          (le16_to_cpu((p_deh)->deh_state))
-
-#define put_deh_offset(p_deh,v)   ((p_deh)->deh_offset = cpu_to_le32((v)))
-#define put_deh_dir_id(p_deh,v)   ((p_deh)->deh_dir_id = cpu_to_le32((v)))
-#define put_deh_objectid(p_deh,v) ((p_deh)->deh_objectid = cpu_to_le32((v)))
-#define put_deh_location(p_deh,v) ((p_deh)->deh_location = cpu_to_le16((v)))
-#define put_deh_state(p_deh,v)    ((p_deh)->deh_state = cpu_to_le16((v)))
-
-/* empty directory contains two entries "." and ".." and their headers */
-#define EMPTY_DIR_SIZE \
-(DEH_SIZE * 2 + ROUND_UP (strlen (".")) + ROUND_UP (strlen ("..")))
-
-/* old format directories have this size when empty */
-#define EMPTY_DIR_SIZE_V1 (DEH_SIZE * 2 + 3)
-
-#define DEH_Statdata 0		/* not used now */
-#define DEH_Visible 2
-
-/* 64 bit systems (and the S/390) need to be aligned explicitly -jdm */
-#if BITS_PER_LONG == 64 || defined(__s390__) || defined(__hppa__)
-#   define ADDR_UNALIGNED_BITS  (3)
-#endif
-
-/* These are only used to manipulate deh_state.
- * Because of this, we'll use the ext2_ bit routines,
- * since they are little endian */
-#ifdef ADDR_UNALIGNED_BITS
-
-#   define aligned_address(addr)           ((void *)((long)(addr) & ~((1UL << ADDR_UNALIGNED_BITS) - 1)))
-#   define unaligned_offset(addr)          (((int)((long)(addr) & ((1 << ADDR_UNALIGNED_BITS) - 1))) << 3)
-
-#   define set_bit_unaligned(nr, addr)	\
-	__test_and_set_bit_le((nr) + unaligned_offset(addr), aligned_address(addr))
-#   define clear_bit_unaligned(nr, addr)	\
-	__test_and_clear_bit_le((nr) + unaligned_offset(addr), aligned_address(addr))
-#   define test_bit_unaligned(nr, addr)	\
-	test_bit_le((nr) + unaligned_offset(addr), aligned_address(addr))
-
-#else
-
-#   define set_bit_unaligned(nr, addr)	__test_and_set_bit_le(nr, addr)
-#   define clear_bit_unaligned(nr, addr)	__test_and_clear_bit_le(nr, addr)
-#   define test_bit_unaligned(nr, addr)	test_bit_le(nr, addr)
-
-#endif
-
-#define mark_de_with_sd(deh)        set_bit_unaligned (DEH_Statdata, &((deh)->deh_state))
-#define mark_de_without_sd(deh)     clear_bit_unaligned (DEH_Statdata, &((deh)->deh_state))
-#define mark_de_visible(deh)	    set_bit_unaligned (DEH_Visible, &((deh)->deh_state))
-#define mark_de_hidden(deh)	    clear_bit_unaligned (DEH_Visible, &((deh)->deh_state))
-
-#define de_with_sd(deh)		    test_bit_unaligned (DEH_Statdata, &((deh)->deh_state))
-#define de_visible(deh)	    	    test_bit_unaligned (DEH_Visible, &((deh)->deh_state))
-#define de_hidden(deh)	    	    !test_bit_unaligned (DEH_Visible, &((deh)->deh_state))
-
-extern void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid,
-				   __le32 par_dirid, __le32 par_objid);
-extern void make_empty_dir_item(char *body, __le32 dirid, __le32 objid,
-				__le32 par_dirid, __le32 par_objid);
-
-/* array of the entry headers */
- /* get item body */
-#define B_I_PITEM(bh,ih) ( (bh)->b_data + ih_location(ih) )
-#define B_I_DEH(bh,ih) ((struct reiserfs_de_head *)(B_I_PITEM(bh,ih)))
-
-/* length of the directory entry in directory item. This define
-   calculates length of i-th directory entry using directory entry
-   locations from dir entry head. When it calculates length of 0-th
-   directory entry, it uses length of whole item in place of entry
-   location of the non-existent following entry in the calculation.
-   See picture above.*/
-/*
-#define I_DEH_N_ENTRY_LENGTH(ih,deh,i) \
-((i) ? (deh_location((deh)-1) - deh_location((deh))) : (ih_item_len((ih)) - deh_location((deh))))
-*/
-static inline int entry_length(const struct buffer_head *bh,
-			       const struct item_head *ih, int pos_in_item)
-{
-	struct reiserfs_de_head *deh;
-
-	deh = B_I_DEH(bh, ih) + pos_in_item;
-	if (pos_in_item)
-		return deh_location(deh - 1) - deh_location(deh);
-
-	return ih_item_len(ih) - deh_location(deh);
-}
-
-/* number of entries in the directory item, depends on ENTRY_COUNT being at the start of directory dynamic data. */
-#define I_ENTRY_COUNT(ih) (ih_entry_count((ih)))
-
-/* name by bh, ih and entry_num */
-#define B_I_E_NAME(bh,ih,entry_num) ((char *)(bh->b_data + ih_location(ih) + deh_location(B_I_DEH(bh,ih)+(entry_num))))
-
-// two entries per block (at least)
-#define REISERFS_MAX_NAME(block_size) 255
-
-/* this structure is used for operations on directory entries. It is
-   not a disk structure. */
-/* When reiserfs_find_entry or search_by_entry_key find directory
-   entry, they return filled reiserfs_dir_entry structure */
-struct reiserfs_dir_entry {
-	struct buffer_head *de_bh;
-	int de_item_num;
-	struct item_head *de_ih;
-	int de_entry_num;
-	struct reiserfs_de_head *de_deh;
-	int de_entrylen;
-	int de_namelen;
-	char *de_name;
-	unsigned long *de_gen_number_bit_string;
-
-	__u32 de_dir_id;
-	__u32 de_objectid;
-
-	struct cpu_key de_entry_key;
-};
-
-/* these defines are useful when a particular member of a reiserfs_dir_entry is needed */
-
-/* pointer to file name, stored in entry */
-#define B_I_DEH_ENTRY_FILE_NAME(bh,ih,deh) (B_I_PITEM (bh, ih) + deh_location(deh))
-
-/* length of name */
-#define I_DEH_N_ENTRY_FILE_NAME_LENGTH(ih,deh,entry_num) \
-(I_DEH_N_ENTRY_LENGTH (ih, deh, entry_num) - (de_with_sd (deh) ? SD_SIZE : 0))
-
-/* hash value occupies bits from 7 up to 30 */
-#define GET_HASH_VALUE(offset) ((offset) & 0x7fffff80LL)
-/* generation number occupies 7 bits starting from 0 up to 6 */
-#define GET_GENERATION_NUMBER(offset) ((offset) & 0x7fLL)
-#define MAX_GENERATION_NUMBER  127
-
-#define SET_GENERATION_NUMBER(offset,gen_number) (GET_HASH_VALUE(offset)|(gen_number))
-
-/*
- * Picture represents an internal node of the reiserfs tree
- *  ______________________________________________________
- * |      |  Array of     |  Array of         |  Free     |
- * |block |    keys       |  pointers         | space     |
- * | head |      N        |      N+1          |           |
- * |______|_______________|___________________|___________|
- */
-
-/***************************************************************************/
-/*                      DISK CHILD                                         */
-/***************************************************************************/
-/* Disk child pointer: The pointer from an internal node of the tree
-   to a node that is on disk. */
-struct disk_child {
-	__le32 dc_block_number;	/* Disk child's block number. */
-	__le16 dc_size;		/* Disk child's used space.   */
-	__le16 dc_reserved;
-};
-
-#define DC_SIZE (sizeof(struct disk_child))
-#define dc_block_number(dc_p)	(le32_to_cpu((dc_p)->dc_block_number))
-#define dc_size(dc_p)		(le16_to_cpu((dc_p)->dc_size))
-#define put_dc_block_number(dc_p, val)   do { (dc_p)->dc_block_number = cpu_to_le32(val); } while(0)
-#define put_dc_size(dc_p, val)   do { (dc_p)->dc_size = cpu_to_le16(val); } while(0)
-
-/* Get disk child by buffer header and position in the tree node. */
-#define B_N_CHILD(bh, n_pos)  ((struct disk_child *)\
-((bh)->b_data + BLKH_SIZE + B_NR_ITEMS(bh) * KEY_SIZE + DC_SIZE * (n_pos)))
-
-/* Get disk child number by buffer header and position in the tree node. */
-#define B_N_CHILD_NUM(bh, n_pos) (dc_block_number(B_N_CHILD(bh, n_pos)))
-#define PUT_B_N_CHILD_NUM(bh, n_pos, val) \
-				(put_dc_block_number(B_N_CHILD(bh, n_pos), val))
-
- /* maximal value of field child_size in structure disk_child */
- /* child size is the combined size of all items and their headers */
-#define MAX_CHILD_SIZE(bh) ((int)( (bh)->b_size - BLKH_SIZE ))
-
-/* amount of used space in buffer (not including block head) */
-#define B_CHILD_SIZE(cur) (MAX_CHILD_SIZE(cur)-(B_FREE_SPACE(cur)))
-
-/* max and min number of keys in internal node */
-#define MAX_NR_KEY(bh) ( (MAX_CHILD_SIZE(bh)-DC_SIZE)/(KEY_SIZE+DC_SIZE) )
-#define MIN_NR_KEY(bh)    (MAX_NR_KEY(bh)/2)
-
-/***************************************************************************/
-/*                      PATH STRUCTURES AND DEFINES                        */
-/***************************************************************************/
-
-/* Search_by_key fills up the path from the root to the leaf as it descends the tree looking for the
-   key.  It uses reiserfs_bread to try to find buffers in the cache given their block number.  If it
-   does not find them in the cache it reads them from disk.  For each node search_by_key finds using
-   reiserfs_bread it then uses bin_search to look through that node.  bin_search will find the
-   position of the block_number of the next node if it is looking through an internal node.  If it
-   is looking through a leaf node bin_search will find the position of the item which has key either
-   equal to given key, or which is the maximal key less than the given key. */
-
-struct path_element {
-	struct buffer_head *pe_buffer;	/* Pointer to the buffer at the path in the tree. */
-	int pe_position;	/* Position in the tree node which is placed in the */
-	/* buffer above.                                  */
-};
-
-#define MAX_HEIGHT 5		/* maximal height of a tree. don't change this without changing JOURNAL_PER_BALANCE_CNT */
-#define EXTENDED_MAX_HEIGHT         7	/* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */
-#define FIRST_PATH_ELEMENT_OFFSET   2	/* Must be equal to at least 2. */
-
-#define ILLEGAL_PATH_ELEMENT_OFFSET 1	/* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */
-#define MAX_FEB_SIZE 6		/* this MUST be MAX_HEIGHT + 1. See about FEB below */
-
-/* We need to keep track of who the ancestors of nodes are.  When we
-   perform a search we record which nodes were visited while
-   descending the tree looking for the node we searched for. This list
-   of nodes is called the path.  This information is used while
-   performing balancing.  Note that this path information may become
-   invalid, and this means we must check it when using it to see if it
-   is still valid. You'll need to read search_by_key and the comments
-   in it, especially about decrement_counters_in_path(), to understand
-   this structure.  
-
-Paths make the code so much harder to work with and debug.... An
-enormous number of bugs are due to them, and trying to write or modify
-code that uses them just makes my head hurt.  They are based on an
-excessive effort to avoid disturbing the precious VFS code.:-( The
-gods only know how we are going to SMP the code that uses them.
-znodes are the way! */
-
-#define PATH_READA	0x1	/* do read ahead */
-#define PATH_READA_BACK 0x2	/* read backwards */
-
-struct treepath {
-	int path_length;	/* Length of the array above.   */
-	int reada;
-	struct path_element path_elements[EXTENDED_MAX_HEIGHT];	/* Array of the path elements.  */
-	int pos_in_item;
-};
-
-#define pos_in_item(path) ((path)->pos_in_item)
-
-#define INITIALIZE_PATH(var) \
-struct treepath var = {.path_length = ILLEGAL_PATH_ELEMENT_OFFSET, .reada = 0,}
-
-/* Get path element by path and path position. */
-#define PATH_OFFSET_PELEMENT(path, n_offset)  ((path)->path_elements + (n_offset))
-
-/* Get buffer header at the path by path and path position. */
-#define PATH_OFFSET_PBUFFER(path, n_offset)   (PATH_OFFSET_PELEMENT(path, n_offset)->pe_buffer)
-
-/* Get position in the element at the path by path and path position. */
-#define PATH_OFFSET_POSITION(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_position)
-
-#define PATH_PLAST_BUFFER(path) (PATH_OFFSET_PBUFFER((path), (path)->path_length))
-				/* you know, to the person who didn't
-				   write this the macro name does not
-				   at first suggest what it does.
-				   Maybe POSITION_FROM_PATH_END? Or
-				   maybe we should just focus on
-				   dumping paths... -Hans */
-#define PATH_LAST_POSITION(path) (PATH_OFFSET_POSITION((path), (path)->path_length))
-
-#define PATH_PITEM_HEAD(path)    B_N_PITEM_HEAD(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path))
-
-/* in do_balance leaf has h == 0 in contrast with path structure,
-   where root has level == 0. That is why we need these defines */
-#define PATH_H_PBUFFER(path, h) PATH_OFFSET_PBUFFER (path, path->path_length - (h))	/* tb->S[h] */
-#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER (path, (h) + 1)	/* tb->F[h] or tb->S[0]->b_parent */
-#define PATH_H_POSITION(path, h) PATH_OFFSET_POSITION (path, path->path_length - (h))
-#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1)	/* tb->S[h]->b_item_order */
-
-#define PATH_H_PATH_OFFSET(path, n_h) ((path)->path_length - (n_h))
-
-#define get_last_bh(path) PATH_PLAST_BUFFER(path)
-#define get_ih(path) PATH_PITEM_HEAD(path)
-#define get_item_pos(path) PATH_LAST_POSITION(path)
-#define get_item(path) ((void *)B_N_PITEM(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION (path)))
-#define item_moved(ih,path) comp_items(ih, path)
-#define path_changed(ih,path) comp_items (ih, path)
-
-/***************************************************************************/
-/*                       MISC                                              */
-/***************************************************************************/
-
-/* Size of pointer to the unformatted node. */
-#define UNFM_P_SIZE (sizeof(unp_t))
-#define UNFM_P_SHIFT 2
-
-// in in-core inode key is stored on le form
-#define INODE_PKEY(inode) ((struct reiserfs_key *)(REISERFS_I(inode)->i_key))
-
-#define MAX_UL_INT 0xffffffff
-#define MAX_INT    0x7ffffff
-#define MAX_US_INT 0xffff
-
-// reiserfs version 2 has max offset 60 bits. Version 1 - 32 bit offset
-#define U32_MAX (~(__u32)0)
-
-static inline loff_t max_reiserfs_offset(struct inode *inode)
-{
-	if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5)
-		return (loff_t) U32_MAX;
-
-	return (loff_t) ((~(__u64) 0) >> 4);
-}
-
-/*#define MAX_KEY_UNIQUENESS	MAX_UL_INT*/
-#define MAX_KEY_OBJECTID	MAX_UL_INT
-
-#define MAX_B_NUM  MAX_UL_INT
-#define MAX_FC_NUM MAX_US_INT
-
-/* the purpose is to detect overflow of an unsigned short */
-#define REISERFS_LINK_MAX (MAX_US_INT - 1000)
-
-/* The following defines are used in reiserfs_insert_item and reiserfs_append_item  */
-#define REISERFS_KERNEL_MEM		0	/* reiserfs kernel memory mode  */
-#define REISERFS_USER_MEM		1	/* reiserfs user memory mode            */
-
-#define fs_generation(s) (REISERFS_SB(s)->s_generation_counter)
-#define get_generation(s) atomic_read (&fs_generation(s))
-#define FILESYSTEM_CHANGED_TB(tb)  (get_generation((tb)->tb_sb) != (tb)->fs_gen)
-#define __fs_changed(gen,s) (gen != get_generation (s))
-#define fs_changed(gen,s)		\
-({					\
-	reiserfs_cond_resched(s);	\
-	__fs_changed(gen, s);		\
-})
-
-/***************************************************************************/
-/*                  FIXATE NODES                                           */
-/***************************************************************************/
-
-#define VI_TYPE_LEFT_MERGEABLE 1
-#define VI_TYPE_RIGHT_MERGEABLE 2
-
-/* To make any changes in the tree we always first find node, that
-   contains item to be changed/deleted or place to insert a new
-   item. We call this node S. To do balancing we need to decide what
-   we will shift to left/right neighbor, or to a new node, where new
-   item will be etc. To make this analysis simpler we build virtual
-   node. Virtual node is an array of items, that will replace items of
-   node S. (For instance if we are going to delete an item, virtual
-   node does not contain it). Virtual node keeps information about
-   item sizes and types, mergeability of first and last items, sizes
-   of all entries in directory item. We use this array of items when
-   calculating what we can shift to neighbors and how many nodes we
-   have to have if we do not any shiftings, if we shift to left/right
-   neighbor or to both. */
-struct virtual_item {
-	int vi_index;		// index in the array of item operations
-	unsigned short vi_type;	// left/right mergeability
-	unsigned short vi_item_len;	/* length of item that it will have after balancing */
-	struct item_head *vi_ih;
-	const char *vi_item;	// body of item (old or new)
-	const void *vi_new_data;	// 0 always but paste mode
-	void *vi_uarea;		// item specific area
-};
-
-struct virtual_node {
-	char *vn_free_ptr;	/* this is a pointer to the free space in the buffer */
-	unsigned short vn_nr_item;	/* number of items in virtual node */
-	short vn_size;		/* size of node , that node would have if it has unlimited size and no balancing is performed */
-	short vn_mode;		/* mode of balancing (paste, insert, delete, cut) */
-	short vn_affected_item_num;
-	short vn_pos_in_item;
-	struct item_head *vn_ins_ih;	/* item header of inserted item, 0 for other modes */
-	const void *vn_data;
-	struct virtual_item *vn_vi;	/* array of items (including a new one, excluding item to be deleted) */
-};
-
-/* used by directory items when creating virtual nodes */
-struct direntry_uarea {
-	int flags;
-	__u16 entry_count;
-	__u16 entry_sizes[1];
-} __attribute__ ((__packed__));
-
-/***************************************************************************/
-/*                  TREE BALANCE                                           */
-/***************************************************************************/
-
-/* This temporary structure is used in tree balance algorithms, and
-   constructed as we go to the extent that its various parts are
-   needed.  It contains arrays of nodes that can potentially be
-   involved in the balancing of node S, and parameters that define how
-   each of the nodes must be balanced.  Note that in these algorithms
-   for balancing the worst case is to need to balance the current node
-   S and the left and right neighbors and all of their parents plus
-   create a new node.  We implement S1 balancing for the leaf nodes
-   and S0 balancing for the internal nodes (S1 and S0 are defined in
-   our papers.)*/
-
-#define MAX_FREE_BLOCK 7	/* size of the array of buffers to free at end of do_balance */
-
-/* maximum number of FEB blocknrs on a single level */
-#define MAX_AMOUNT_NEEDED 2
-
-/* someday somebody will prefix every field in this struct with tb_ */
-struct tree_balance {
-	int tb_mode;
-	int need_balance_dirty;
-	struct super_block *tb_sb;
-	struct reiserfs_transaction_handle *transaction_handle;
-	struct treepath *tb_path;
-	struct buffer_head *L[MAX_HEIGHT];	/* array of left neighbors of nodes in the path */
-	struct buffer_head *R[MAX_HEIGHT];	/* array of right neighbors of nodes in the path */
-	struct buffer_head *FL[MAX_HEIGHT];	/* array of fathers of the left  neighbors      */
-	struct buffer_head *FR[MAX_HEIGHT];	/* array of fathers of the right neighbors      */
-	struct buffer_head *CFL[MAX_HEIGHT];	/* array of common parents of center node and its left neighbor  */
-	struct buffer_head *CFR[MAX_HEIGHT];	/* array of common parents of center node and its right neighbor */
-
-	struct buffer_head *FEB[MAX_FEB_SIZE];	/* array of empty buffers. Number of buffers in array equals
-						   cur_blknum. */
-	struct buffer_head *used[MAX_FEB_SIZE];
-	struct buffer_head *thrown[MAX_FEB_SIZE];
-	int lnum[MAX_HEIGHT];	/* array of number of items which must be
-				   shifted to the left in order to balance the
-				   current node; for leaves includes item that
-				   will be partially shifted; for internal
-				   nodes, it is the number of child pointers
-				   rather than items. It includes the new item
-				   being created. The code sometimes subtracts
-				   one to get the number of wholly shifted
-				   items for other purposes. */
-	int rnum[MAX_HEIGHT];	/* substitute right for left in comment above */
-	int lkey[MAX_HEIGHT];	/* array indexed by height h mapping the key delimiting L[h] and
-				   S[h] to its item number within the node CFL[h] */
-	int rkey[MAX_HEIGHT];	/* substitute r for l in comment above */
-	int insert_size[MAX_HEIGHT];	/* the number of bytes by we are trying to add or remove from
-					   S[h]. A negative value means removing.  */
-	int blknum[MAX_HEIGHT];	/* number of nodes that will replace node S[h] after
-				   balancing on the level h of the tree.  If 0 then S is
-				   being deleted, if 1 then S is remaining and no new nodes
-				   are being created, if 2 or 3 then 1 or 2 new nodes is
-				   being created */
-
-	/* fields that are used only for balancing leaves of the tree */
-	int cur_blknum;		/* number of empty blocks having been already allocated                 */
-	int s0num;		/* number of items that fall into left most  node when S[0] splits     */
-	int s1num;		/* number of items that fall into first  new node when S[0] splits     */
-	int s2num;		/* number of items that fall into second new node when S[0] splits     */
-	int lbytes;		/* number of bytes which can flow to the left neighbor from the        left    */
-	/* most liquid item that cannot be shifted from S[0] entirely         */
-	/* if -1 then nothing will be partially shifted */
-	int rbytes;		/* number of bytes which will flow to the right neighbor from the right        */
-	/* most liquid item that cannot be shifted from S[0] entirely         */
-	/* if -1 then nothing will be partially shifted                           */
-	int s1bytes;		/* number of bytes which flow to the first  new node when S[0] splits   */
-	/* note: if S[0] splits into 3 nodes, then items do not need to be cut  */
-	int s2bytes;
-	struct buffer_head *buf_to_free[MAX_FREE_BLOCK];	/* buffers which are to be freed after do_balance finishes by unfix_nodes */
-	char *vn_buf;		/* kmalloced memory. Used to create
-				   virtual node and keep map of
-				   dirtied bitmap blocks */
-	int vn_buf_size;	/* size of the vn_buf */
-	struct virtual_node *tb_vn;	/* VN starts after bitmap of bitmap blocks */
-
-	int fs_gen;		/* saved value of `reiserfs_generation' counter
-				   see FILESYSTEM_CHANGED() macro in reiserfs_fs.h */
-#ifdef DISPLACE_NEW_PACKING_LOCALITIES
-	struct in_core_key key;	/* key pointer, to pass to block allocator or
-				   another low-level subsystem */
-#endif
-};
-
-/* These are modes of balancing */
-
-/* When inserting an item. */
-#define M_INSERT	'i'
-/* When inserting into (directories only) or appending onto an already
-   existent item. */
-#define M_PASTE		'p'
-/* When deleting an item. */
-#define M_DELETE	'd'
-/* When truncating an item or removing an entry from a (directory) item. */
-#define M_CUT 		'c'
-
-/* used when balancing on leaf level skipped (in reiserfsck) */
-#define M_INTERNAL	'n'
-
-/* When further balancing is not needed, then do_balance does not need
-   to be called. */
-#define M_SKIP_BALANCING 		's'
-#define M_CONVERT	'v'
-
-/* modes of leaf_move_items */
-#define LEAF_FROM_S_TO_L 0
-#define LEAF_FROM_S_TO_R 1
-#define LEAF_FROM_R_TO_L 2
-#define LEAF_FROM_L_TO_R 3
-#define LEAF_FROM_S_TO_SNEW 4
-
-#define FIRST_TO_LAST 0
-#define LAST_TO_FIRST 1
-
-/* used in do_balance for passing parent of node information that has
-   been gotten from tb struct */
-struct buffer_info {
-	struct tree_balance *tb;
-	struct buffer_head *bi_bh;
-	struct buffer_head *bi_parent;
-	int bi_position;
-};
-
-static inline struct super_block *sb_from_tb(struct tree_balance *tb)
-{
-	return tb ? tb->tb_sb : NULL;
-}
-
-static inline struct super_block *sb_from_bi(struct buffer_info *bi)
-{
-	return bi ? sb_from_tb(bi->tb) : NULL;
-}
-
-/* there are 4 types of items: stat data, directory item, indirect, direct.
-+-------------------+------------+--------------+------------+
-|	            |  k_offset  | k_uniqueness | mergeable? |
-+-------------------+------------+--------------+------------+
-|     stat data     |	0        |      0       |   no       |
-+-------------------+------------+--------------+------------+
-| 1st directory item| DOT_OFFSET |DIRENTRY_UNIQUENESS|   no       | 
-| non 1st directory | hash value |              |   yes      |
-|     item          |            |              |            |
-+-------------------+------------+--------------+------------+
-| indirect item     | offset + 1 |TYPE_INDIRECT |   if this is not the first indirect item of the object
-+-------------------+------------+--------------+------------+
-| direct item       | offset + 1 |TYPE_DIRECT   | if not this is not the first direct item of the object
-+-------------------+------------+--------------+------------+
-*/
-
-struct item_operations {
-	int (*bytes_number) (struct item_head * ih, int block_size);
-	void (*decrement_key) (struct cpu_key *);
-	int (*is_left_mergeable) (struct reiserfs_key * ih,
-				  unsigned long bsize);
-	void (*print_item) (struct item_head *, char *item);
-	void (*check_item) (struct item_head *, char *item);
-
-	int (*create_vi) (struct virtual_node * vn, struct virtual_item * vi,
-			  int is_affected, int insert_size);
-	int (*check_left) (struct virtual_item * vi, int free,
-			   int start_skip, int end_skip);
-	int (*check_right) (struct virtual_item * vi, int free);
-	int (*part_size) (struct virtual_item * vi, int from, int to);
-	int (*unit_num) (struct virtual_item * vi);
-	void (*print_vi) (struct virtual_item * vi);
-};
-
-extern struct item_operations *item_ops[TYPE_ANY + 1];
-
-#define op_bytes_number(ih,bsize)                    item_ops[le_ih_k_type (ih)]->bytes_number (ih, bsize)
-#define op_is_left_mergeable(key,bsize)              item_ops[le_key_k_type (le_key_version (key), key)]->is_left_mergeable (key, bsize)
-#define op_print_item(ih,item)                       item_ops[le_ih_k_type (ih)]->print_item (ih, item)
-#define op_check_item(ih,item)                       item_ops[le_ih_k_type (ih)]->check_item (ih, item)
-#define op_create_vi(vn,vi,is_affected,insert_size)  item_ops[le_ih_k_type ((vi)->vi_ih)]->create_vi (vn,vi,is_affected,insert_size)
-#define op_check_left(vi,free,start_skip,end_skip) item_ops[(vi)->vi_index]->check_left (vi, free, start_skip, end_skip)
-#define op_check_right(vi,free)                      item_ops[(vi)->vi_index]->check_right (vi, free)
-#define op_part_size(vi,from,to)                     item_ops[(vi)->vi_index]->part_size (vi, from, to)
-#define op_unit_num(vi)				     item_ops[(vi)->vi_index]->unit_num (vi)
-#define op_print_vi(vi)                              item_ops[(vi)->vi_index]->print_vi (vi)
-
-#define COMP_SHORT_KEYS comp_short_keys
-
-/* number of blocks pointed to by the indirect item */
-#define I_UNFM_NUM(ih)	(ih_item_len(ih) / UNFM_P_SIZE)
-
-/* the used space within the unformatted node corresponding to pos within the item pointed to by ih */
-#define I_POS_UNFM_SIZE(ih,pos,size) (((pos) == I_UNFM_NUM(ih) - 1 ) ? (size) - ih_free_space(ih) : (size))
-
-/* number of bytes contained by the direct item or the unformatted nodes the indirect item points to */
-
-/* get the item header */
-#define B_N_PITEM_HEAD(bh,item_num) ( (struct item_head * )((bh)->b_data + BLKH_SIZE) + (item_num) )
-
-/* get key */
-#define B_N_PDELIM_KEY(bh,item_num) ( (struct reiserfs_key * )((bh)->b_data + BLKH_SIZE) + (item_num) )
-
-/* get the key */
-#define B_N_PKEY(bh,item_num) ( &(B_N_PITEM_HEAD(bh,item_num)->ih_key) )
-
-/* get item body */
-#define B_N_PITEM(bh,item_num) ( (bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(item_num))))
-
-/* get the stat data by the buffer header and the item order */
-#define B_N_STAT_DATA(bh,nr) \
-( (struct stat_data *)((bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(nr))) ) )
-
-    /* following defines use reiserfs buffer header and item header */
-
-/* get stat-data */
-#define B_I_STAT_DATA(bh, ih) ( (struct stat_data * )((bh)->b_data + ih_location(ih)) )
-
-// this is 3976 for size==4096
-#define MAX_DIRECT_ITEM_LEN(size) ((size) - BLKH_SIZE - 2*IH_SIZE - SD_SIZE - UNFM_P_SIZE)
-
-/* indirect items consist of entries which contain blocknrs, pos
-   indicates which entry, and B_I_POS_UNFM_POINTER resolves to the
-   blocknr contained by the entry pos points to */
-#define B_I_POS_UNFM_POINTER(bh,ih,pos) le32_to_cpu(*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)))
-#define PUT_B_I_POS_UNFM_POINTER(bh,ih,pos, val) do {*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)) = cpu_to_le32(val); } while (0)
-
-struct reiserfs_iget_args {
-	__u32 objectid;
-	__u32 dirid;
-};
-
-/***************************************************************************/
-/*                    FUNCTION DECLARATIONS                                */
-/***************************************************************************/
-
-#define get_journal_desc_magic(bh) (bh->b_data + bh->b_size - 12)
-
-#define journal_trans_half(blocksize) \
-	((blocksize - sizeof (struct reiserfs_journal_desc) + sizeof (__u32) - 12) / sizeof (__u32))
-
-/* journal.c see journal.c for all the comments here */
-
-/* first block written in a commit.  */
-struct reiserfs_journal_desc {
-	__le32 j_trans_id;	/* id of commit */
-	__le32 j_len;		/* length of commit. len +1 is the commit block */
-	__le32 j_mount_id;	/* mount id of this trans */
-	__le32 j_realblock[1];	/* real locations for each block */
-};
-
-#define get_desc_trans_id(d)   le32_to_cpu((d)->j_trans_id)
-#define get_desc_trans_len(d)  le32_to_cpu((d)->j_len)
-#define get_desc_mount_id(d)   le32_to_cpu((d)->j_mount_id)
-
-#define set_desc_trans_id(d,val)       do { (d)->j_trans_id = cpu_to_le32 (val); } while (0)
-#define set_desc_trans_len(d,val)      do { (d)->j_len = cpu_to_le32 (val); } while (0)
-#define set_desc_mount_id(d,val)       do { (d)->j_mount_id = cpu_to_le32 (val); } while (0)
-
-/* last block written in a commit */
-struct reiserfs_journal_commit {
-	__le32 j_trans_id;	/* must match j_trans_id from the desc block */
-	__le32 j_len;		/* ditto */
-	__le32 j_realblock[1];	/* real locations for each block */
-};
-
-#define get_commit_trans_id(c) le32_to_cpu((c)->j_trans_id)
-#define get_commit_trans_len(c)        le32_to_cpu((c)->j_len)
-#define get_commit_mount_id(c) le32_to_cpu((c)->j_mount_id)
-
-#define set_commit_trans_id(c,val)     do { (c)->j_trans_id = cpu_to_le32 (val); } while (0)
-#define set_commit_trans_len(c,val)    do { (c)->j_len = cpu_to_le32 (val); } while (0)
-
-/* this header block gets written whenever a transaction is considered fully flushed, and is more recent than the
-** last fully flushed transaction.  fully flushed means all the log blocks and all the real blocks are on disk,
-** and this transaction does not need to be replayed.
-*/
-struct reiserfs_journal_header {
-	__le32 j_last_flush_trans_id;	/* id of last fully flushed transaction */
-	__le32 j_first_unflushed_offset;	/* offset in the log of where to start replay after a crash */
-	__le32 j_mount_id;
-	/* 12 */ struct journal_params jh_journal;
-};
-
-/* biggest tunable defines are right here */
-#define JOURNAL_BLOCK_COUNT 8192	/* number of blocks in the journal */
-#define JOURNAL_TRANS_MAX_DEFAULT 1024	/* biggest possible single transaction, don't change for now (8/3/99) */
-#define JOURNAL_TRANS_MIN_DEFAULT 256
-#define JOURNAL_MAX_BATCH_DEFAULT   900	/* max blocks to batch into one transaction, don't make this any bigger than 900 */
-#define JOURNAL_MIN_RATIO 2
-#define JOURNAL_MAX_COMMIT_AGE 30
-#define JOURNAL_MAX_TRANS_AGE 30
-#define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9)
-#define JOURNAL_BLOCKS_PER_OBJECT(sb)  (JOURNAL_PER_BALANCE_CNT * 3 + \
-					 2 * (REISERFS_QUOTA_INIT_BLOCKS(sb) + \
-					      REISERFS_QUOTA_TRANS_BLOCKS(sb)))
-
-#ifdef CONFIG_QUOTA
-#define REISERFS_QUOTA_OPTS ((1 << REISERFS_USRQUOTA) | (1 << REISERFS_GRPQUOTA))
-/* We need to update data and inode (atime) */
-#define REISERFS_QUOTA_TRANS_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? 2 : 0)
-/* 1 balancing, 1 bitmap, 1 data per write + stat data update */
-#define REISERFS_QUOTA_INIT_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \
-(DQUOT_INIT_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_INIT_REWRITE+1) : 0)
-/* same as with INIT */
-#define REISERFS_QUOTA_DEL_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \
-(DQUOT_DEL_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_DEL_REWRITE+1) : 0)
-#else
-#define REISERFS_QUOTA_TRANS_BLOCKS(s) 0
-#define REISERFS_QUOTA_INIT_BLOCKS(s) 0
-#define REISERFS_QUOTA_DEL_BLOCKS(s) 0
-#endif
-
-/* both of these can be as low as 1, or as high as you want.  The min is the
-** number of 4k bitmap nodes preallocated on mount. New nodes are allocated
-** as needed, and released when transactions are committed.  On release, if 
-** the current number of nodes is > max, the node is freed, otherwise, 
-** it is put on a free list for faster use later.
-*/
-#define REISERFS_MIN_BITMAP_NODES 10
-#define REISERFS_MAX_BITMAP_NODES 100
-
-#define JBH_HASH_SHIFT 13	/* these are based on journal hash size of 8192 */
-#define JBH_HASH_MASK 8191
-
-#define _jhashfn(sb,block)	\
-	(((unsigned long)sb>>L1_CACHE_SHIFT) ^ \
-	 (((block)<<(JBH_HASH_SHIFT - 6)) ^ ((block) >> 13) ^ ((block) << (JBH_HASH_SHIFT - 12))))
-#define journal_hash(t,sb,block) ((t)[_jhashfn((sb),(block)) & JBH_HASH_MASK])
-
-// We need these to make journal.c code more readable
-#define journal_find_get_block(s, block) __find_get_block(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
-#define journal_getblk(s, block) __getblk(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
-#define journal_bread(s, block) __bread(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
-
-enum reiserfs_bh_state_bits {
-	BH_JDirty = BH_PrivateStart,	/* buffer is in current transaction */
-	BH_JDirty_wait,
-	BH_JNew,		/* disk block was taken off free list before
-				 * being in a finished transaction, or
-				 * written to disk. Can be reused immed. */
-	BH_JPrepared,
-	BH_JRestore_dirty,
-	BH_JTest,		// debugging only will go away
-};
-
-BUFFER_FNS(JDirty, journaled);
-TAS_BUFFER_FNS(JDirty, journaled);
-BUFFER_FNS(JDirty_wait, journal_dirty);
-TAS_BUFFER_FNS(JDirty_wait, journal_dirty);
-BUFFER_FNS(JNew, journal_new);
-TAS_BUFFER_FNS(JNew, journal_new);
-BUFFER_FNS(JPrepared, journal_prepared);
-TAS_BUFFER_FNS(JPrepared, journal_prepared);
-BUFFER_FNS(JRestore_dirty, journal_restore_dirty);
-TAS_BUFFER_FNS(JRestore_dirty, journal_restore_dirty);
-BUFFER_FNS(JTest, journal_test);
-TAS_BUFFER_FNS(JTest, journal_test);
-
-/*
-** transaction handle which is passed around for all journal calls
-*/
-struct reiserfs_transaction_handle {
-	struct super_block *t_super;	/* super for this FS when journal_begin was
-					   called. saves calls to reiserfs_get_super
-					   also used by nested transactions to make
-					   sure they are nesting on the right FS
-					   _must_ be first in the handle
-					 */
-	int t_refcount;
-	int t_blocks_logged;	/* number of blocks this writer has logged */
-	int t_blocks_allocated;	/* number of blocks this writer allocated */
-	unsigned int t_trans_id;	/* sanity check, equals the current trans id */
-	void *t_handle_save;	/* save existing current->journal_info */
-	unsigned displace_new_blocks:1;	/* if new block allocation occurres, that block
-					   should be displaced from others */
-	struct list_head t_list;
-};
-
-/* used to keep track of ordered and tail writes, attached to the buffer
- * head through b_journal_head.
- */
-struct reiserfs_jh {
-	struct reiserfs_journal_list *jl;
-	struct buffer_head *bh;
-	struct list_head list;
-};
-
-void reiserfs_free_jh(struct buffer_head *bh);
-int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh);
-int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh);
-int journal_mark_dirty(struct reiserfs_transaction_handle *,
-		       struct super_block *, struct buffer_head *bh);
-
-static inline int reiserfs_file_data_log(struct inode *inode)
-{
-	if (reiserfs_data_log(inode->i_sb) ||
-	    (REISERFS_I(inode)->i_flags & i_data_log))
-		return 1;
-	return 0;
-}
-
-static inline int reiserfs_transaction_running(struct super_block *s)
-{
-	struct reiserfs_transaction_handle *th = current->journal_info;
-	if (th && th->t_super == s)
-		return 1;
-	if (th && th->t_super == NULL)
-		BUG();
-	return 0;
-}
-
-static inline int reiserfs_transaction_free_space(struct reiserfs_transaction_handle *th)
-{
-	return th->t_blocks_allocated - th->t_blocks_logged;
-}
-
-struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct
-								    super_block
-								    *,
-								    int count);
-int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *);
-int reiserfs_commit_page(struct inode *inode, struct page *page,
-			 unsigned from, unsigned to);
-int reiserfs_flush_old_commits(struct super_block *);
-int reiserfs_commit_for_inode(struct inode *);
-int reiserfs_inode_needs_commit(struct inode *);
-void reiserfs_update_inode_transaction(struct inode *);
-void reiserfs_wait_on_write_block(struct super_block *s);
-void reiserfs_block_writes(struct reiserfs_transaction_handle *th);
-void reiserfs_allow_writes(struct super_block *s);
-void reiserfs_check_lock_depth(struct super_block *s, char *caller);
-int reiserfs_prepare_for_journal(struct super_block *, struct buffer_head *bh,
-				 int wait);
-void reiserfs_restore_prepared_buffer(struct super_block *,
-				      struct buffer_head *bh);
-int journal_init(struct super_block *, const char *j_dev_name, int old_format,
-		 unsigned int);
-int journal_release(struct reiserfs_transaction_handle *, struct super_block *);
-int journal_release_error(struct reiserfs_transaction_handle *,
-			  struct super_block *);
-int journal_end(struct reiserfs_transaction_handle *, struct super_block *,
-		unsigned long);
-int journal_end_sync(struct reiserfs_transaction_handle *, struct super_block *,
-		     unsigned long);
-int journal_mark_freed(struct reiserfs_transaction_handle *,
-		       struct super_block *, b_blocknr_t blocknr);
-int journal_transaction_should_end(struct reiserfs_transaction_handle *, int);
-int reiserfs_in_journal(struct super_block *sb, unsigned int bmap_nr,
-			 int bit_nr, int searchall, b_blocknr_t *next);
-int journal_begin(struct reiserfs_transaction_handle *,
-		  struct super_block *sb, unsigned long);
-int journal_join_abort(struct reiserfs_transaction_handle *,
-		       struct super_block *sb, unsigned long);
-void reiserfs_abort_journal(struct super_block *sb, int errno);
-void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...);
-int reiserfs_allocate_list_bitmaps(struct super_block *s,
-				   struct reiserfs_list_bitmap *, unsigned int);
-
-void add_save_link(struct reiserfs_transaction_handle *th,
-		   struct inode *inode, int truncate);
-int remove_save_link(struct inode *inode, int truncate);
-
-/* objectid.c */
-__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th);
-void reiserfs_release_objectid(struct reiserfs_transaction_handle *th,
-			       __u32 objectid_to_release);
-int reiserfs_convert_objectid_map_v1(struct super_block *);
-
-/* stree.c */
-int B_IS_IN_TREE(const struct buffer_head *);
-extern void copy_item_head(struct item_head *to,
-			   const struct item_head *from);
-
-// first key is in cpu form, second - le
-extern int comp_short_keys(const struct reiserfs_key *le_key,
-			   const struct cpu_key *cpu_key);
-extern void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from);
-
-// both are in le form
-extern int comp_le_keys(const struct reiserfs_key *,
-			const struct reiserfs_key *);
-extern int comp_short_le_keys(const struct reiserfs_key *,
-			      const struct reiserfs_key *);
-
-//
-// get key version from on disk key - kludge
-//
-static inline int le_key_version(const struct reiserfs_key *key)
-{
-	int type;
-
-	type = offset_v2_k_type(&(key->u.k_offset_v2));
-	if (type != TYPE_DIRECT && type != TYPE_INDIRECT
-	    && type != TYPE_DIRENTRY)
-		return KEY_FORMAT_3_5;
-
-	return KEY_FORMAT_3_6;
-
-}
-
-static inline void copy_key(struct reiserfs_key *to,
-			    const struct reiserfs_key *from)
-{
-	memcpy(to, from, KEY_SIZE);
-}
-
-int comp_items(const struct item_head *stored_ih, const struct treepath *path);
-const struct reiserfs_key *get_rkey(const struct treepath *chk_path,
-				    const struct super_block *sb);
-int search_by_key(struct super_block *, const struct cpu_key *,
-		  struct treepath *, int);
-#define search_item(s,key,path) search_by_key (s, key, path, DISK_LEAF_NODE_LEVEL)
-int search_for_position_by_key(struct super_block *sb,
-			       const struct cpu_key *cpu_key,
-			       struct treepath *search_path);
-extern void decrement_bcount(struct buffer_head *bh);
-void decrement_counters_in_path(struct treepath *search_path);
-void pathrelse(struct treepath *search_path);
-int reiserfs_check_path(struct treepath *p);
-void pathrelse_and_restore(struct super_block *s, struct treepath *search_path);
-
-int reiserfs_insert_item(struct reiserfs_transaction_handle *th,
-			 struct treepath *path,
-			 const struct cpu_key *key,
-			 struct item_head *ih,
-			 struct inode *inode, const char *body);
-
-int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th,
-			     struct treepath *path,
-			     const struct cpu_key *key,
-			     struct inode *inode,
-			     const char *body, int paste_size);
-
-int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th,
-			   struct treepath *path,
-			   struct cpu_key *key,
-			   struct inode *inode,
-			   struct page *page, loff_t new_file_size);
-
-int reiserfs_delete_item(struct reiserfs_transaction_handle *th,
-			 struct treepath *path,
-			 const struct cpu_key *key,
-			 struct inode *inode, struct buffer_head *un_bh);
-
-void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th,
-				struct inode *inode, struct reiserfs_key *key);
-int reiserfs_delete_object(struct reiserfs_transaction_handle *th,
-			   struct inode *inode);
-int reiserfs_do_truncate(struct reiserfs_transaction_handle *th,
-			 struct inode *inode, struct page *,
-			 int update_timestamps);
-
-#define i_block_size(inode) ((inode)->i_sb->s_blocksize)
-#define file_size(inode) ((inode)->i_size)
-#define tail_size(inode) (file_size (inode) & (i_block_size (inode) - 1))
-
-#define tail_has_to_be_packed(inode) (have_large_tails ((inode)->i_sb)?\
-!STORE_TAIL_IN_UNFM_S1(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):have_small_tails ((inode)->i_sb)?!STORE_TAIL_IN_UNFM_S2(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):0 )
-
-void padd_item(char *item, int total_length, int length);
-
-/* inode.c */
-/* args for the create parameter of reiserfs_get_block */
-#define GET_BLOCK_NO_CREATE 0	/* don't create new blocks or convert tails */
-#define GET_BLOCK_CREATE 1	/* add anything you need to find block */
-#define GET_BLOCK_NO_HOLE 2	/* return -ENOENT for file holes */
-#define GET_BLOCK_READ_DIRECT 4	/* read the tail if indirect item not found */
-#define GET_BLOCK_NO_IMUX     8	/* i_mutex is not held, don't preallocate */
-#define GET_BLOCK_NO_DANGLE   16	/* don't leave any transactions running */
-
-void reiserfs_read_locked_inode(struct inode *inode,
-				struct reiserfs_iget_args *args);
-int reiserfs_find_actor(struct inode *inode, void *p);
-int reiserfs_init_locked_inode(struct inode *inode, void *p);
-void reiserfs_evict_inode(struct inode *inode);
-int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc);
-int reiserfs_get_block(struct inode *inode, sector_t block,
-		       struct buffer_head *bh_result, int create);
-struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
-				     int fh_len, int fh_type);
-struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid,
-				     int fh_len, int fh_type);
-int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
-		       int connectable);
-
-int reiserfs_truncate_file(struct inode *, int update_timestamps);
-void make_cpu_key(struct cpu_key *cpu_key, struct inode *inode, loff_t offset,
-		  int type, int key_length);
-void make_le_item_head(struct item_head *ih, const struct cpu_key *key,
-		       int version,
-		       loff_t offset, int type, int length, int entry_count);
-struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key);
-
-struct reiserfs_security_handle;
-int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
-		       struct inode *dir, umode_t mode,
-		       const char *symname, loff_t i_size,
-		       struct dentry *dentry, struct inode *inode,
-		       struct reiserfs_security_handle *security);
-
-void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th,
-			     struct inode *inode, loff_t size);
-
-static inline void reiserfs_update_sd(struct reiserfs_transaction_handle *th,
-				      struct inode *inode)
-{
-	reiserfs_update_sd_size(th, inode, inode->i_size);
-}
-
-void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode);
-void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs);
-int reiserfs_setattr(struct dentry *dentry, struct iattr *attr);
-
-int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len);
-
-/* namei.c */
-void set_de_name_and_namelen(struct reiserfs_dir_entry *de);
-int search_by_entry_key(struct super_block *sb, const struct cpu_key *key,
-			struct treepath *path, struct reiserfs_dir_entry *de);
-struct dentry *reiserfs_get_parent(struct dentry *);
-
-#ifdef CONFIG_REISERFS_PROC_INFO
-int reiserfs_proc_info_init(struct super_block *sb);
-int reiserfs_proc_info_done(struct super_block *sb);
-int reiserfs_proc_info_global_init(void);
-int reiserfs_proc_info_global_done(void);
-
-#define PROC_EXP( e )   e
-
-#define __PINFO( sb ) REISERFS_SB(sb) -> s_proc_info_data
-#define PROC_INFO_MAX( sb, field, value )								\
-    __PINFO( sb ).field =												\
-        max( REISERFS_SB( sb ) -> s_proc_info_data.field, value )
-#define PROC_INFO_INC( sb, field ) ( ++ ( __PINFO( sb ).field ) )
-#define PROC_INFO_ADD( sb, field, val ) ( __PINFO( sb ).field += ( val ) )
-#define PROC_INFO_BH_STAT( sb, bh, level )							\
-    PROC_INFO_INC( sb, sbk_read_at[ ( level ) ] );						\
-    PROC_INFO_ADD( sb, free_at[ ( level ) ], B_FREE_SPACE( bh ) );	\
-    PROC_INFO_ADD( sb, items_at[ ( level ) ], B_NR_ITEMS( bh ) )
-#else
-static inline int reiserfs_proc_info_init(struct super_block *sb)
-{
-	return 0;
-}
-
-static inline int reiserfs_proc_info_done(struct super_block *sb)
-{
-	return 0;
-}
-
-static inline int reiserfs_proc_info_global_init(void)
-{
-	return 0;
-}
-
-static inline int reiserfs_proc_info_global_done(void)
-{
-	return 0;
-}
-
-#define PROC_EXP( e )
-#define VOID_V ( ( void ) 0 )
-#define PROC_INFO_MAX( sb, field, value ) VOID_V
-#define PROC_INFO_INC( sb, field ) VOID_V
-#define PROC_INFO_ADD( sb, field, val ) VOID_V
-#define PROC_INFO_BH_STAT(sb, bh, n_node_level) VOID_V
-#endif
-
-/* dir.c */
-extern const struct inode_operations reiserfs_dir_inode_operations;
-extern const struct inode_operations reiserfs_symlink_inode_operations;
-extern const struct inode_operations reiserfs_special_inode_operations;
-extern const struct file_operations reiserfs_dir_operations;
-int reiserfs_readdir_dentry(struct dentry *, void *, filldir_t, loff_t *);
-
-/* tail_conversion.c */
-int direct2indirect(struct reiserfs_transaction_handle *, struct inode *,
-		    struct treepath *, struct buffer_head *, loff_t);
-int indirect2direct(struct reiserfs_transaction_handle *, struct inode *,
-		    struct page *, struct treepath *, const struct cpu_key *,
-		    loff_t, char *);
-void reiserfs_unmap_buffer(struct buffer_head *);
-
-/* file.c */
-extern const struct inode_operations reiserfs_file_inode_operations;
-extern const struct file_operations reiserfs_file_operations;
-extern const struct address_space_operations reiserfs_address_space_operations;
-
-/* fix_nodes.c */
-
-int fix_nodes(int n_op_mode, struct tree_balance *tb,
-	      struct item_head *ins_ih, const void *);
-void unfix_nodes(struct tree_balance *);
-
-/* prints.c */
-void __reiserfs_panic(struct super_block *s, const char *id,
-		      const char *function, const char *fmt, ...)
-    __attribute__ ((noreturn));
-#define reiserfs_panic(s, id, fmt, args...) \
-	__reiserfs_panic(s, id, __func__, fmt, ##args)
-void __reiserfs_error(struct super_block *s, const char *id,
-		      const char *function, const char *fmt, ...);
-#define reiserfs_error(s, id, fmt, args...) \
-	 __reiserfs_error(s, id, __func__, fmt, ##args)
-void reiserfs_info(struct super_block *s, const char *fmt, ...);
-void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...);
-void print_indirect_item(struct buffer_head *bh, int item_num);
-void store_print_tb(struct tree_balance *tb);
-void print_cur_tb(char *mes);
-void print_de(struct reiserfs_dir_entry *de);
-void print_bi(struct buffer_info *bi, char *mes);
-#define PRINT_LEAF_ITEMS 1	/* print all items */
-#define PRINT_DIRECTORY_ITEMS 2	/* print directory items */
-#define PRINT_DIRECT_ITEMS 4	/* print contents of direct items */
-void print_block(struct buffer_head *bh, ...);
-void print_bmap(struct super_block *s, int silent);
-void print_bmap_block(int i, char *data, int size, int silent);
-/*void print_super_block (struct super_block * s, char * mes);*/
-void print_objectid_map(struct super_block *s);
-void print_block_head(struct buffer_head *bh, char *mes);
-void check_leaf(struct buffer_head *bh);
-void check_internal(struct buffer_head *bh);
-void print_statistics(struct super_block *s);
-char *reiserfs_hashname(int code);
-
-/* lbalance.c */
-int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num,
-		    int mov_bytes, struct buffer_head *Snew);
-int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes);
-int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes);
-void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first,
-		       int del_num, int del_bytes);
-void leaf_insert_into_buf(struct buffer_info *bi, int before,
-			  struct item_head *inserted_item_ih,
-			  const char *inserted_item_body, int zeros_number);
-void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num,
-			  int pos_in_item, int paste_size, const char *body,
-			  int zeros_number);
-void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
-			  int pos_in_item, int cut_size);
-void leaf_paste_entries(struct buffer_info *bi, int item_num, int before,
-			int new_entry_count, struct reiserfs_de_head *new_dehs,
-			const char *records, int paste_size);
-/* ibalance.c */
-int balance_internal(struct tree_balance *, int, int, struct item_head *,
-		     struct buffer_head **);
-
-/* do_balance.c */
-void do_balance_mark_leaf_dirty(struct tree_balance *tb,
-				struct buffer_head *bh, int flag);
-#define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty
-#define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty
-
-void do_balance(struct tree_balance *tb, struct item_head *ih,
-		const char *body, int flag);
-void reiserfs_invalidate_buffer(struct tree_balance *tb,
-				struct buffer_head *bh);
-
-int get_left_neighbor_position(struct tree_balance *tb, int h);
-int get_right_neighbor_position(struct tree_balance *tb, int h);
-void replace_key(struct tree_balance *tb, struct buffer_head *, int,
-		 struct buffer_head *, int);
-void make_empty_node(struct buffer_info *);
-struct buffer_head *get_FEB(struct tree_balance *);
-
-/* bitmap.c */
-
-/* structure contains hints for block allocator, and it is a container for
- * arguments, such as node, search path, transaction_handle, etc. */
-struct __reiserfs_blocknr_hint {
-	struct inode *inode;	/* inode passed to allocator, if we allocate unf. nodes */
-	sector_t block;		/* file offset, in blocks */
-	struct in_core_key key;
-	struct treepath *path;	/* search path, used by allocator to deternine search_start by
-				 * various ways */
-	struct reiserfs_transaction_handle *th;	/* transaction handle is needed to log super blocks and
-						 * bitmap blocks changes  */
-	b_blocknr_t beg, end;
-	b_blocknr_t search_start;	/* a field used to transfer search start value (block number)
-					 * between different block allocator procedures
-					 * (determine_search_start() and others) */
-	int prealloc_size;	/* is set in determine_prealloc_size() function, used by underlayed
-				 * function that do actual allocation */
-
-	unsigned formatted_node:1;	/* the allocator uses different polices for getting disk space for
-					 * formatted/unformatted blocks with/without preallocation */
-	unsigned preallocate:1;
-};
-
-typedef struct __reiserfs_blocknr_hint reiserfs_blocknr_hint_t;
-
-int reiserfs_parse_alloc_options(struct super_block *, char *);
-void reiserfs_init_alloc_options(struct super_block *s);
-
-/*
- * given a directory, this will tell you what packing locality
- * to use for a new object underneat it.  The locality is returned
- * in disk byte order (le).
- */
-__le32 reiserfs_choose_packing(struct inode *dir);
-
-int reiserfs_init_bitmap_cache(struct super_block *sb);
-void reiserfs_free_bitmap_cache(struct super_block *sb);
-void reiserfs_cache_bitmap_metadata(struct super_block *sb, struct buffer_head *bh, struct reiserfs_bitmap_info *info);
-struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, unsigned int bitmap);
-int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value);
-void reiserfs_free_block(struct reiserfs_transaction_handle *th, struct inode *,
-			 b_blocknr_t, int for_unformatted);
-int reiserfs_allocate_blocknrs(reiserfs_blocknr_hint_t *, b_blocknr_t *, int,
-			       int);
-static inline int reiserfs_new_form_blocknrs(struct tree_balance *tb,
-					     b_blocknr_t * new_blocknrs,
-					     int amount_needed)
-{
-	reiserfs_blocknr_hint_t hint = {
-		.th = tb->transaction_handle,
-		.path = tb->tb_path,
-		.inode = NULL,
-		.key = tb->key,
-		.block = 0,
-		.formatted_node = 1
-	};
-	return reiserfs_allocate_blocknrs(&hint, new_blocknrs, amount_needed,
-					  0);
-}
-
-static inline int reiserfs_new_unf_blocknrs(struct reiserfs_transaction_handle
-					    *th, struct inode *inode,
-					    b_blocknr_t * new_blocknrs,
-					    struct treepath *path,
-					    sector_t block)
-{
-	reiserfs_blocknr_hint_t hint = {
-		.th = th,
-		.path = path,
-		.inode = inode,
-		.block = block,
-		.formatted_node = 0,
-		.preallocate = 0
-	};
-	return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0);
-}
-
-#ifdef REISERFS_PREALLOCATE
-static inline int reiserfs_new_unf_blocknrs2(struct reiserfs_transaction_handle
-					     *th, struct inode *inode,
-					     b_blocknr_t * new_blocknrs,
-					     struct treepath *path,
-					     sector_t block)
-{
-	reiserfs_blocknr_hint_t hint = {
-		.th = th,
-		.path = path,
-		.inode = inode,
-		.block = block,
-		.formatted_node = 0,
-		.preallocate = 1
-	};
-	return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0);
-}
-
-void reiserfs_discard_prealloc(struct reiserfs_transaction_handle *th,
-			       struct inode *inode);
-void reiserfs_discard_all_prealloc(struct reiserfs_transaction_handle *th);
-#endif
-
-/* hashes.c */
-__u32 keyed_hash(const signed char *msg, int len);
-__u32 yura_hash(const signed char *msg, int len);
-__u32 r5_hash(const signed char *msg, int len);
-
-#define reiserfs_set_le_bit		__set_bit_le
-#define reiserfs_test_and_set_le_bit	__test_and_set_bit_le
-#define reiserfs_clear_le_bit		__clear_bit_le
-#define reiserfs_test_and_clear_le_bit	__test_and_clear_bit_le
-#define reiserfs_test_le_bit		test_bit_le
-#define reiserfs_find_next_zero_le_bit	find_next_zero_bit_le
-
-/* sometimes reiserfs_truncate may require to allocate few new blocks
-   to perform indirect2direct conversion. People probably used to
-   think, that truncate should work without problems on a filesystem
-   without free disk space. They may complain that they can not
-   truncate due to lack of free disk space. This spare space allows us
-   to not worry about it. 500 is probably too much, but it should be
-   absolutely safe */
-#define SPARE_SPACE 500
-
-/* prototypes from ioctl.c */
-long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
-long reiserfs_compat_ioctl(struct file *filp,
-		   unsigned int cmd, unsigned long arg);
-int reiserfs_unpack(struct inode *inode, struct file *filp);
-
-#endif /* __KERNEL__ */
 
 #endif				/* _LINUX_REISER_FS_H */

include/linux/reiserfs_fs_i.h

···
-#ifndef _REISER_FS_I
-#define _REISER_FS_I
-
-#include <linux/list.h>
-
-struct reiserfs_journal_list;
-
-/** bitmasks for i_flags field in reiserfs-specific part of inode */
-typedef enum {
-    /** this says what format of key do all items (but stat data) of
-      an object have.  If this is set, that format is 3.6 otherwise
-      - 3.5 */
-	i_item_key_version_mask = 0x0001,
-    /** If this is unset, object has 3.5 stat data, otherwise, it has
-      3.6 stat data with 64bit size, 32bit nlink etc. */
-	i_stat_data_version_mask = 0x0002,
-    /** file might need tail packing on close */
-	i_pack_on_close_mask = 0x0004,
-    /** don't pack tail of file */
-	i_nopack_mask = 0x0008,
-    /** If those is set, "safe link" was created for this file during
-      truncate or unlink. Safe link is used to avoid leakage of disk
-      space on crash with some files open, but unlinked. */
-	i_link_saved_unlink_mask = 0x0010,
-	i_link_saved_truncate_mask = 0x0020,
-	i_has_xattr_dir = 0x0040,
-	i_data_log = 0x0080,
-} reiserfs_inode_flags;
-
-struct reiserfs_inode_info {
-	__u32 i_key[4];		/* key is still 4 32 bit integers */
-    /** transient inode flags that are never stored on disk. Bitmasks
-      for this field are defined above. */
-	__u32 i_flags;
-
-	__u32 i_first_direct_byte;	// offset of first byte stored in direct item.
-
-	/* copy of persistent inode flags read from sd_attrs. */
-	__u32 i_attrs;
-
-	int i_prealloc_block;	/* first unused block of a sequence of unused blocks */
-	int i_prealloc_count;	/* length of that sequence */
-	struct list_head i_prealloc_list;	/* per-transaction list of inodes which
-						 * have preallocated blocks */
-
-	unsigned new_packing_locality:1;	/* new_packig_locality is created; new blocks
-						 * for the contents of this directory should be
-						 * displaced */
-
-	/* we use these for fsync or O_SYNC to decide which transaction
-	 ** needs to be committed in order for this inode to be properly
-	 ** flushed */
-	unsigned int i_trans_id;
-	struct reiserfs_journal_list *i_jl;
-	atomic_t openers;
-	struct mutex tailpack;
-#ifdef CONFIG_REISERFS_FS_XATTR
-	struct rw_semaphore i_xattr_sem;
-#endif
-	struct inode vfs_inode;
-};
-
-#endif

include/linux/reiserfs_fs_sb.h

···
-/* Copyright 1996-2000 Hans Reiser, see reiserfs/README for licensing
- * and copyright details */
-
-#ifndef _LINUX_REISER_FS_SB
-#define _LINUX_REISER_FS_SB
-
-#ifdef __KERNEL__
-#include <linux/workqueue.h>
-#include <linux/rwsem.h>
-#include <linux/mutex.h>
-#include <linux/sched.h>
-#endif
-
-typedef enum {
-	reiserfs_attrs_cleared = 0x00000001,
-} reiserfs_super_block_flags;
-
-/* struct reiserfs_super_block accessors/mutators
- * since this is a disk structure, it will always be in
- * little endian format. */
-#define sb_block_count(sbp)         (le32_to_cpu((sbp)->s_v1.s_block_count))
-#define set_sb_block_count(sbp,v)   ((sbp)->s_v1.s_block_count = cpu_to_le32(v))
-#define sb_free_blocks(sbp)         (le32_to_cpu((sbp)->s_v1.s_free_blocks))
-#define set_sb_free_blocks(sbp,v)   ((sbp)->s_v1.s_free_blocks = cpu_to_le32(v))
-#define sb_root_block(sbp)          (le32_to_cpu((sbp)->s_v1.s_root_block))
-#define set_sb_root_block(sbp,v)    ((sbp)->s_v1.s_root_block = cpu_to_le32(v))
-
-#define sb_jp_journal_1st_block(sbp)  \
-              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_1st_block))
-#define set_sb_jp_journal_1st_block(sbp,v) \
-              ((sbp)->s_v1.s_journal.jp_journal_1st_block = cpu_to_le32(v))
-#define sb_jp_journal_dev(sbp) \
-              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_dev))
-#define set_sb_jp_journal_dev(sbp,v) \
-              ((sbp)->s_v1.s_journal.jp_journal_dev = cpu_to_le32(v))
-#define sb_jp_journal_size(sbp) \
-              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_size))
-#define set_sb_jp_journal_size(sbp,v) \
-              ((sbp)->s_v1.s_journal.jp_journal_size = cpu_to_le32(v))
-#define sb_jp_journal_trans_max(sbp) \
-              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_trans_max))
-#define set_sb_jp_journal_trans_max(sbp,v) \
-              ((sbp)->s_v1.s_journal.jp_journal_trans_max = cpu_to_le32(v))
-#define sb_jp_journal_magic(sbp) \
-              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_magic))
-#define set_sb_jp_journal_magic(sbp,v) \
-              ((sbp)->s_v1.s_journal.jp_journal_magic = cpu_to_le32(v))
-#define sb_jp_journal_max_batch(sbp) \
-              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_batch))
-#define set_sb_jp_journal_max_batch(sbp,v) \
-              ((sbp)->s_v1.s_journal.jp_journal_max_batch = cpu_to_le32(v))
-#define sb_jp_jourmal_max_commit_age(sbp) \
-              (le32_to_cpu((sbp)->s_v1.s_journal.jp_journal_max_commit_age))
-#define set_sb_jp_journal_max_commit_age(sbp,v) \
-              ((sbp)->s_v1.s_journal.jp_journal_max_commit_age = cpu_to_le32(v))
-
-#define sb_blocksize(sbp)          (le16_to_cpu((sbp)->s_v1.s_blocksize))
-#define set_sb_blocksize(sbp,v)    ((sbp)->s_v1.s_blocksize = cpu_to_le16(v))
-#define sb_oid_maxsize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_maxsize))
-#define set_sb_oid_maxsize(sbp,v)  ((sbp)->s_v1.s_oid_maxsize = cpu_to_le16(v))
-#define sb_oid_cursize(sbp)        (le16_to_cpu((sbp)->s_v1.s_oid_cursize))
-#define set_sb_oid_cursize(sbp,v)  ((sbp)->s_v1.s_oid_cursize = cpu_to_le16(v))
-#define sb_umount_state(sbp)       (le16_to_cpu((sbp)->s_v1.s_umount_state))
-#define set_sb_umount_state(sbp,v) ((sbp)->s_v1.s_umount_state = cpu_to_le16(v))
-#define sb_fs_state(sbp)           (le16_to_cpu((sbp)->s_v1.s_fs_state))
-#define set_sb_fs_state(sbp,v)     ((sbp)->s_v1.s_fs_state = cpu_to_le16(v))
-#define sb_hash_function_code(sbp) \
-              (le32_to_cpu((sbp)->s_v1.s_hash_function_code))
-#define set_sb_hash_function_code(sbp,v) \
-              ((sbp)->s_v1.s_hash_function_code = cpu_to_le32(v))
-#define sb_tree_height(sbp)        (le16_to_cpu((sbp)->s_v1.s_tree_height))
-#define set_sb_tree_height(sbp,v)  ((sbp)->s_v1.s_tree_height = cpu_to_le16(v))
-#define sb_bmap_nr(sbp)            (le16_to_cpu((sbp)->s_v1.s_bmap_nr))
-#define set_sb_bmap_nr(sbp,v)      ((sbp)->s_v1.s_bmap_nr = cpu_to_le16(v))
-#define sb_version(sbp)            (le16_to_cpu((sbp)->s_v1.s_version))
-#define set_sb_version(sbp,v)      ((sbp)->s_v1.s_version = cpu_to_le16(v))
-
-#define sb_mnt_count(sbp)	   (le16_to_cpu((sbp)->s_mnt_count))
-#define set_sb_mnt_count(sbp, v)   ((sbp)->s_mnt_count = cpu_to_le16(v))
-
-#define sb_reserved_for_journal(sbp) \
-              (le16_to_cpu((sbp)->s_v1.s_reserved_for_journal))
-#define set_sb_reserved_for_journal(sbp,v) \
-              ((sbp)->s_v1.s_reserved_for_journal = cpu_to_le16(v))
-
-/* LOGGING -- */
-
-/* These all interelate for performance.
-**
-** If the journal block count is smaller than n transactions, you lose speed.
-** I don't know what n is yet, I'm guessing 8-16.
-**
-** typical transaction size depends on the application, how often fsync is
-** called, and how many metadata blocks you dirty in a 30 second period.
-** The more small files (<16k) you use, the larger your transactions will
-** be.
-**
-** If your journal fills faster than dirty buffers get flushed to disk, it must flush them before allowing the journal
-** to wrap, which slows things down.  If you need high speed meta data updates, the journal should be big enough
-** to prevent wrapping before dirty meta blocks get to disk.
-**
-** If the batch max is smaller than the transaction max, you'll waste space at the end of the journal
-** because journal_end sets the next transaction to start at 0 if the next transaction has any chance of wrapping.
-**
-** The large the batch max age, the better the speed, and the more meta data changes you'll lose after a crash.
-**
-*/
-
-/* don't mess with these for a while */
-				/* we have a node size define somewhere in reiserfs_fs.h. -Hans */
-#define JOURNAL_BLOCK_SIZE  4096	/* BUG gotta get rid of this */
-#define JOURNAL_MAX_CNODE   1500	/* max cnodes to allocate. */
-#define JOURNAL_HASH_SIZE 8192
-#define JOURNAL_NUM_BITMAPS 5	/* number of copies of the bitmaps to have floating.  Must be >= 2 */
-
-/* One of these for every block in every transaction
-** Each one is in two hash tables.  First, a hash of the current transaction, and after journal_end, a
-** hash of all the in memory transactions.
-** next and prev are used by the current transaction (journal_hash).
-** hnext and hprev are used by journal_list_hash.  If a block is in more than one transaction, the journal_list_hash
-** links it in multiple times.  This allows flush_journal_list to remove just the cnode belonging
-** to a given transaction.
-*/
-struct reiserfs_journal_cnode {
-	struct buffer_head *bh;	/* real buffer head */
-	struct super_block *sb;	/* dev of real buffer head */
-	__u32 blocknr;		/* block number of real buffer head, == 0 when buffer on disk */
-	unsigned long state;
-	struct reiserfs_journal_list *jlist;	/* journal list this cnode lives in */
-	struct reiserfs_journal_cnode *next;	/* next in transaction list */
-	struct reiserfs_journal_cnode *prev;	/* prev in transaction list */
-	struct reiserfs_journal_cnode *hprev;	/* prev in hash list */
-	struct reiserfs_journal_cnode *hnext;	/* next in hash list */
-};
-
-struct reiserfs_bitmap_node {
-	int id;
-	char *data;
-	struct list_head list;
-};
-
-struct reiserfs_list_bitmap {
-	struct reiserfs_journal_list *journal_list;
-	struct reiserfs_bitmap_node **bitmaps;
-};
-
-/*
-** one of these for each transaction.  The most important part here is the j_realblock.
-** this list of cnodes is used to hash all the blocks in all the commits, to mark all the
-** real buffer heads dirty once all the commits hit the disk,
-** and to make sure every real block in a transaction is on disk before allowing the log area
-** to be overwritten */
-struct reiserfs_journal_list {
-	unsigned long j_start;
-	unsigned long j_state;
-	unsigned long j_len;
-	atomic_t j_nonzerolen;
-	atomic_t j_commit_left;
-	atomic_t j_older_commits_done;	/* all commits older than this on disk */
-	struct mutex j_commit_mutex;
-	unsigned int j_trans_id;
-	time_t j_timestamp;
-	struct reiserfs_list_bitmap *j_list_bitmap;
-	struct buffer_head *j_commit_bh;	/* commit buffer head */
-	struct reiserfs_journal_cnode *j_realblock;
-	struct reiserfs_journal_cnode *j_freedlist;	/* list of buffers that were freed during this trans.  free each of these on flush */
-	/* time ordered list of all active transactions */
-	struct list_head j_list;
-
-	/* time ordered list of all transactions we haven't tried to flush yet */
-	struct list_head j_working_list;
-
-	/* list of tail conversion targets in need of flush before commit */
-	struct list_head j_tail_bh_list;
-	/* list of data=ordered buffers in need of flush before commit */
-	struct list_head j_bh_list;
-	int j_refcount;
-};
-
-struct reiserfs_journal {
-	struct buffer_head **j_ap_blocks;	/* journal blocks on disk */
-	struct reiserfs_journal_cnode *j_last;	/* newest journal block */
-	struct reiserfs_journal_cnode *j_first;	/*  oldest journal block.  start here for traverse */
-
-	struct block_device *j_dev_bd;
-	fmode_t j_dev_mode;
-	int j_1st_reserved_block;	/* first block on s_dev of reserved area journal */
-
-	unsigned long j_state;
-	unsigned int j_trans_id;
-	unsigned long j_mount_id;
-	unsigned long j_start;	/* start of current waiting commit (index into j_ap_blocks) */
-	unsigned long j_len;	/* length of current waiting commit */
-	unsigned long j_len_alloc;	/* number of buffers requested by journal_begin() */
-	atomic_t j_wcount;	/* count of writers for current commit */
-	unsigned long j_bcount;	/* batch count. allows turning X transactions into 1 */
-	unsigned long j_first_unflushed_offset;	/* first unflushed transactions offset */
-	unsigned j_last_flush_trans_id;	/* last fully flushed journal timestamp */
-	struct buffer_head *j_header_bh;
-
-	time_t j_trans_start_time;	/* time this transaction started */
-	struct mutex j_mutex;
-	struct mutex j_flush_mutex;
-	wait_queue_head_t j_join_wait;	/* wait for current transaction to finish before starting new one */
-	atomic_t j_jlock;	/* lock for j_join_wait */
-	int j_list_bitmap_index;	/* number of next list bitmap to use */
-	int j_must_wait;	/* no more journal begins allowed. MUST sleep on j_join_wait */
-	int j_next_full_flush;	/* next journal_end will flush all journal list */
-	int j_next_async_flush;	/* next journal_end will flush all async commits */
-
-	int j_cnode_used;	/* number of cnodes on the used list */
-	int j_cnode_free;	/* number of cnodes on the free list */
-
-	unsigned int j_trans_max;	/* max number of blocks in a transaction.  */
-	unsigned int j_max_batch;	/* max number of blocks to batch into a trans */
-	unsigned int j_max_commit_age;	/* in seconds, how old can an async commit be */
-	unsigned int j_max_trans_age;	/* in seconds, how old can a transaction be */
-	unsigned int j_default_max_commit_age;	/* the default for the max commit age */
-
-	struct reiserfs_journal_cnode *j_cnode_free_list;
-	struct reiserfs_journal_cnode *j_cnode_free_orig;	/* orig pointer returned from vmalloc */
-
-	struct reiserfs_journal_list *j_current_jl;
-	int j_free_bitmap_nodes;
-	int j_used_bitmap_nodes;
-
-	int j_num_lists;	/* total number of active transactions */
-	int j_num_work_lists;	/* number that need attention from kreiserfsd */
-
-	/* debugging to make sure things are flushed in order */
-	unsigned int j_last_flush_id;
-
-	/* debugging to make sure things are committed in order */
-	unsigned int j_last_commit_id;
-
-	struct list_head j_bitmap_nodes;
-	struct list_head j_dirty_buffers;
-	spinlock_t j_dirty_buffers_lock;	/* protects j_dirty_buffers */
-
-	/* list of all active transactions */
-	struct list_head j_journal_list;
-	/* lists that haven't been touched by writeback attempts */
-	struct list_head j_working_list;
-
-	struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS];	/* array of bitmaps to record the deleted blocks */
-	struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE];	/* hash table for real buffer heads in current trans */
-	struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE];	/* hash table for all the real buffer heads in all
-										   the transactions */
-	struct list_head j_prealloc_list;	/* list of inodes which have preallocated blocks */
-	int j_persistent_trans;
-	unsigned long j_max_trans_size;
-	unsigned long j_max_batch_size;
-
-	int j_errno;
-
-	/* when flushing ordered buffers, throttle new ordered writers */
-	struct delayed_work j_work;
-	struct super_block *j_work_sb;
-	atomic_t j_async_throttle;
-};
-
-enum journal_state_bits {
-	J_WRITERS_BLOCKED = 1,	/* set when new writers not allowed */
-	J_WRITERS_QUEUED,	/* set when log is full due to too many writers */
-	J_ABORTED,		/* set when log is aborted */
-};
-
-#define JOURNAL_DESC_MAGIC "ReIsErLB"	/* ick.  magic string to find desc blocks in the journal */
-
-typedef __u32(*hashf_t) (const signed char *, int);
-
-struct reiserfs_bitmap_info {
-	__u32 free_count;
-};
-
-struct proc_dir_entry;
-
-#if defined( CONFIG_PROC_FS ) && defined( CONFIG_REISERFS_PROC_INFO )
-typedef unsigned long int stat_cnt_t;
-typedef struct reiserfs_proc_info_data {
-	spinlock_t lock;
-	int exiting;
-	int max_hash_collisions;
-
-	stat_cnt_t breads;
-	stat_cnt_t bread_miss;
-	stat_cnt_t search_by_key;
-	stat_cnt_t search_by_key_fs_changed;
-	stat_cnt_t search_by_key_restarted;
-
-	stat_cnt_t insert_item_restarted;
-	stat_cnt_t paste_into_item_restarted;
-	stat_cnt_t cut_from_item_restarted;
-	stat_cnt_t delete_solid_item_restarted;
-	stat_cnt_t delete_item_restarted;
-
-	stat_cnt_t leaked_oid;
-	stat_cnt_t leaves_removable;
-
-	/* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */
-	stat_cnt_t balance_at[5];	/* XXX */
-	/* sbk == search_by_key */
-	stat_cnt_t sbk_read_at[5];	/* XXX */
-	stat_cnt_t sbk_fs_changed[5];
-	stat_cnt_t sbk_restarted[5];
-	stat_cnt_t items_at[5];	/* XXX */
-	stat_cnt_t free_at[5];	/* XXX */
-	stat_cnt_t can_node_be_removed[5];	/* XXX */
-	long int lnum[5];	/* XXX */
-	long int rnum[5];	/* XXX */
-	long int lbytes[5];	/* XXX */
-	long int rbytes[5];	/* XXX */
-	stat_cnt_t get_neighbors[5];
-	stat_cnt_t get_neighbors_restart[5];
-	stat_cnt_t need_l_neighbor[5];
-	stat_cnt_t need_r_neighbor[5];
-
-	stat_cnt_t free_block;
-	struct __scan_bitmap_stats {
-		stat_cnt_t call;
-		stat_cnt_t wait;
-		stat_cnt_t bmap;
-		stat_cnt_t retry;
-		stat_cnt_t in_journal_hint;
-		stat_cnt_t in_journal_nohint;
-		stat_cnt_t stolen;
-	} scan_bitmap;
-	struct __journal_stats {
-		stat_cnt_t in_journal;
-		stat_cnt_t in_journal_bitmap;
-		stat_cnt_t in_journal_reusable;
-		stat_cnt_t lock_journal;
-		stat_cnt_t lock_journal_wait;
-		stat_cnt_t journal_being;
-		stat_cnt_t journal_relock_writers;
-		stat_cnt_t journal_relock_wcount;
-		stat_cnt_t mark_dirty;
-		stat_cnt_t mark_dirty_already;
-		stat_cnt_t mark_dirty_notjournal;
-		stat_cnt_t restore_prepared;
-		stat_cnt_t prepare;
-		stat_cnt_t prepare_retry;
-	} journal;
-} reiserfs_proc_info_data_t;
-#else
-typedef struct reiserfs_proc_info_data {
-} reiserfs_proc_info_data_t;
-#endif
-
-/* reiserfs union of in-core super block data */
-struct reiserfs_sb_info {
-	struct buffer_head *s_sbh;	/* Buffer containing the super block */
-	/* both the comment and the choice of
-	   name are unclear for s_rs -Hans */
-	struct reiserfs_super_block *s_rs;	/* Pointer to the super block in the buffer */
-	struct reiserfs_bitmap_info *s_ap_bitmap;
-	struct reiserfs_journal *s_journal;	/* pointer to journal information */
-	unsigned short s_mount_state;	/* reiserfs state (valid, invalid) */
-
-	/* Serialize writers access, replace the old bkl */
-	struct mutex lock;
-	/* Owner of the lock (can be recursive) */
-	struct task_struct *lock_owner;
-	/* Depth of the lock, start from -1 like the bkl */
-	int lock_depth;
-
-	/* Comment? -Hans */
-	void (*end_io_handler) (struct buffer_head *, int);
-	hashf_t s_hash_function;	/* pointer to function which is used
-					   to sort names in directory. Set on
-					   mount */
-	unsigned long s_mount_opt;	/* reiserfs's mount options are set
-					   here (currently - NOTAIL, NOLOG,
-					   REPLAYONLY) */
-
-	struct {		/* This is a structure that describes block allocator options */
-		unsigned long bits;	/* Bitfield for enable/disable kind of options */
-		unsigned long large_file_size;	/* size started from which we consider file to be a large one(in blocks) */
-		int border;	/* percentage of disk, border takes */
-		int preallocmin;	/* Minimal file size (in blocks) starting from which we do preallocations */
-		int preallocsize;	/* Number of blocks we try to prealloc when file
-					   reaches preallocmin size (in blocks) or
-					   prealloc_list is empty. */
-	} s_alloc_options;
-
-	/* Comment? -Hans */
-	wait_queue_head_t s_wait;
-	/* To be obsoleted soon by per buffer seals.. -Hans */
-	atomic_t s_generation_counter;	// increased by one every time the
-	// tree gets re-balanced
-	unsigned long s_properties;	/* File system properties. Currently holds
-					   on-disk FS format */
-
-	/* session statistics */
-	int s_disk_reads;
-	int s_disk_writes;
-	int s_fix_nodes;
-	int s_do_balance;
-	int s_unneeded_left_neighbor;
-	int s_good_search_by_key_reada;
-	int s_bmaps;
-	int s_bmaps_without_search;
-	int s_direct2indirect;
-	int s_indirect2direct;
-	/* set up when it's ok for reiserfs_read_inode2() to read from
-	   disk inode with nlink==0. Currently this is only used during
-	   finish_unfinished() processing at mount time */
-	int s_is_unlinked_ok;
-	reiserfs_proc_info_data_t s_proc_info_data;
-	struct proc_dir_entry *procdir;
-	int reserved_blocks;	/* amount of blocks reserved for further allocations */
-	spinlock_t bitmap_lock;	/* this lock on now only used to protect reserved_blocks variable */
-	struct dentry *priv_root;	/* root of /.reiserfs_priv */
-	struct dentry *xattr_root;	/* root of /.reiserfs_priv/xattrs */
-	int j_errno;
-#ifdef CONFIG_QUOTA
-	char *s_qf_names[MAXQUOTAS];
-	int s_jquota_fmt;
-#endif
-	char *s_jdev;		/* Stored jdev for mount option showing */
-#ifdef CONFIG_REISERFS_CHECK
-
-	struct tree_balance *cur_tb;	/*
-					 * Detects whether more than one
-					 * copy of tb exists per superblock
-					 * as a means of checking whether
-					 * do_balance is executing concurrently
-					 * against another tree reader/writer
-					 * on a same mount point.
-					 */
-#endif
-};
-
-/* Definitions of reiserfs on-disk properties: */
-#define REISERFS_3_5 0
-#define REISERFS_3_6 1
-#define REISERFS_OLD_FORMAT 2
-
-enum reiserfs_mount_options {
-/* Mount options */
-	REISERFS_LARGETAIL,	/* large tails will be created in a session */
-	REISERFS_SMALLTAIL,	/* small (for files less than block size) tails will be created in a session */
-	REPLAYONLY,		/* replay journal and return 0. Use by fsck */
-	REISERFS_CONVERT,	/* -o conv: causes conversion of old
-				   format super block to the new
-				   format. If not specified - old
-				   partition will be dealt with in a
-				   manner of 3.5.x */
-
-/* -o hash={tea, rupasov, r5, detect} is meant for properly mounting
-** reiserfs disks from 3.5.19 or earlier.  99% of the time, this option
-** is not required.  If the normal autodection code can't determine which
-** hash to use (because both hashes had the same value for a file)
-** use this option to force a specific hash.  It won't allow you to override
-** the existing hash on the FS, so if you have a tea hash disk, and mount
-** with -o hash=rupasov, the mount will fail.
-*/
-	FORCE_TEA_HASH,		/* try to force tea hash on mount */
-	FORCE_RUPASOV_HASH,	/* try to force rupasov hash on mount */
-	FORCE_R5_HASH,		/* try to force rupasov hash on mount */
-	FORCE_HASH_DETECT,	/* try to detect hash function on mount */
-
-	REISERFS_DATA_LOG,
-	REISERFS_DATA_ORDERED,
-	REISERFS_DATA_WRITEBACK,
-
-/* used for testing experimental features, makes benchmarking new
-   features with and without more convenient, should never be used by
-   users in any code shipped to users (ideally) */
-
-	REISERFS_NO_BORDER,
-	REISERFS_NO_UNHASHED_RELOCATION,
-	REISERFS_HASHED_RELOCATION,
-	REISERFS_ATTRS,
-	REISERFS_XATTRS_USER,
-	REISERFS_POSIXACL,
-	REISERFS_EXPOSE_PRIVROOT,
-	REISERFS_BARRIER_NONE,
-	REISERFS_BARRIER_FLUSH,
-
-	/* Actions on error */
-	REISERFS_ERROR_PANIC,
-	REISERFS_ERROR_RO,
-	REISERFS_ERROR_CONTINUE,
-
-	REISERFS_USRQUOTA,	/* User quota option specified */
-	REISERFS_GRPQUOTA,	/* Group quota option specified */
-
-	REISERFS_TEST1,
-	REISERFS_TEST2,
-	REISERFS_TEST3,
-	REISERFS_TEST4,
-	REISERFS_UNSUPPORTED_OPT,
-};
-
-#define reiserfs_r5_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_R5_HASH))
-#define reiserfs_rupasov_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_RUPASOV_HASH))
-#define reiserfs_tea_hash(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_TEA_HASH))
-#define reiserfs_hash_detect(s) (REISERFS_SB(s)->s_mount_opt & (1 << FORCE_HASH_DETECT))
-#define reiserfs_no_border(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_BORDER))
-#define reiserfs_no_unhashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_NO_UNHASHED_RELOCATION))
-#define reiserfs_hashed_relocation(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_HASHED_RELOCATION))
-#define reiserfs_test4(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TEST4))
-
-#define have_large_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_LARGETAIL))
-#define have_small_tails(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_SMALLTAIL))
-#define replay_only(s) (REISERFS_SB(s)->s_mount_opt & (1 << REPLAYONLY))
-#define reiserfs_attrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ATTRS))
-#define old_format_only(s) (REISERFS_SB(s)->s_properties & (1 << REISERFS_3_5))
-#define convert_reiserfs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_CONVERT))
-#define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG))
-#define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED))
-#define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK))
-#define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER))
-#define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL))
-#define reiserfs_expose_privroot(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_EXPOSE_PRIVROOT))
-#define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s))
-#define reiserfs_barrier_none(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_NONE))
-#define reiserfs_barrier_flush(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_BARRIER_FLUSH))
-
-#define reiserfs_error_panic(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_PANIC))
-#define reiserfs_error_ro(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_ERROR_RO))
-
-void reiserfs_file_buffer(struct buffer_head *bh, int list);
-extern struct file_system_type reiserfs_fs_type;
-int reiserfs_resize(struct super_block *, unsigned long);
-
-#define CARRY_ON                0
-#define SCHEDULE_OCCURRED       1
-
-#define SB_BUFFER_WITH_SB(s) (REISERFS_SB(s)->s_sbh)
-#define SB_JOURNAL(s) (REISERFS_SB(s)->s_journal)
-#define SB_JOURNAL_1st_RESERVED_BLOCK(s) (SB_JOURNAL(s)->j_1st_reserved_block)
-#define SB_JOURNAL_LEN_FREE(s) (SB_JOURNAL(s)->j_journal_len_free)
-#define SB_AP_BITMAP(s) (REISERFS_SB(s)->s_ap_bitmap)
-
-#define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->)
-
-/* A safe version of the "bdevname", which returns the "s_id" field of
- * a superblock or else "Null superblock" if the super block is NULL.
- */
-static inline char *reiserfs_bdevname(struct super_block *s)
-{
-	return (s == NULL) ? "Null superblock" : s->s_id;
-}
-
-#define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal)))
-static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal
-						*journal)
-{
-	return test_bit(J_ABORTED, &journal->j_state);
-}
-
-#endif				/* _LINUX_REISER_FS_SB */

include/linux/reiserfs_xattr.h

···
 	size_t length;
 };
 
-#ifdef __KERNEL__
-
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/rwsem.h>
-#include <linux/reiserfs_fs_i.h>
-#include <linux/reiserfs_fs.h>
-
-struct inode;
-struct dentry;
-struct iattr;
-struct super_block;
-struct nameidata;
-
-int reiserfs_xattr_register_handlers(void) __init;
-void reiserfs_xattr_unregister_handlers(void);
-int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
-int reiserfs_lookup_privroot(struct super_block *sb);
-int reiserfs_delete_xattrs(struct inode *inode);
-int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
-int reiserfs_permission(struct inode *inode, int mask);
-
-#ifdef CONFIG_REISERFS_FS_XATTR
-#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
-ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
-			  void *buffer, size_t size);
-int reiserfs_setxattr(struct dentry *dentry, const char *name,
-		      const void *value, size_t size, int flags);
-ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
-int reiserfs_removexattr(struct dentry *dentry, const char *name);
-
-int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
-int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
-int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
-			      struct inode *, const char *, const void *,
-			      size_t, int);
-
-extern const struct xattr_handler reiserfs_xattr_user_handler;
-extern const struct xattr_handler reiserfs_xattr_trusted_handler;
-extern const struct xattr_handler reiserfs_xattr_security_handler;
-#ifdef CONFIG_REISERFS_FS_SECURITY
-int reiserfs_security_init(struct inode *dir, struct inode *inode,
-			   const struct qstr *qstr,
-			   struct reiserfs_security_handle *sec);
-int reiserfs_security_write(struct reiserfs_transaction_handle *th,
-			    struct inode *inode,
-			    struct reiserfs_security_handle *sec);
-void reiserfs_security_free(struct reiserfs_security_handle *sec);
-#endif
-
-static inline int reiserfs_xattrs_initialized(struct super_block *sb)
-{
-	return REISERFS_SB(sb)->priv_root != NULL;
-}
-
-#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
-static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
-{
-	loff_t ret = 0;
-	if (reiserfs_file_data_log(inode)) {
-		ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
-		ret >>= inode->i_sb->s_blocksize_bits;
-	}
-	return ret;
-}
-
-/* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
- * Let's try to be smart about it.
- * xattr root: We cache it. If it's not cached, we may need to create it.
- * xattr dir: If anything has been loaded for this inode, we can set a flag
- *            saying so.
- * xattr file: Since we don't cache xattrs, we can't tell. We always include
- *             blocks for it.
- *
- * However, since root and dir can be created between calls - YOU MUST SAVE
- * THIS VALUE.
- */
-static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
-{
-	size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
-
-	if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
-		nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
-		if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode)
-			nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
-	}
-
-	return nblocks;
-}
-
-static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
-{
-	init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
-}
-
-#else
-
-#define reiserfs_getxattr NULL
-#define reiserfs_setxattr NULL
-#define reiserfs_listxattr NULL
-#define reiserfs_removexattr NULL
-
-static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
-{
-}
-#endif  /*  CONFIG_REISERFS_FS_XATTR  */
-
-#ifndef CONFIG_REISERFS_FS_SECURITY
-static inline int reiserfs_security_init(struct inode *dir,
-					 struct inode *inode,
-					 const struct qstr *qstr,
-					 struct reiserfs_security_handle *sec)
-{
-	return 0;
-}
-static inline int
-reiserfs_security_write(struct reiserfs_transaction_handle *th,
-			struct inode *inode,
-			struct reiserfs_security_handle *sec)
-{
-	return 0;
-}
-static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
-{}
-#endif
-
-#endif  /*  __KERNEL__  */
-
 #endif  /*  _LINUX_REISERFS_XATTR_H  */

include/linux/trace_seq.h

···
 extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
 				size_t len);
 extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
-extern int trace_seq_path(struct trace_seq *s, struct path *path);
+extern int trace_seq_path(struct trace_seq *s, const struct path *path);
 
 #else /* CONFIG_TRACING */
 static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
···
 {
 	return NULL;
 }
-static inline int trace_seq_path(struct trace_seq *s, struct path *path)
+static inline int trace_seq_path(struct trace_seq *s, const struct path *path)
 {
 	return 0;
 }

include/net/af_unix.h

···
 	/* WARNING: sk has to be the first member */
 	struct sock		sk;
 	struct unix_address     *addr;
-	struct dentry		*dentry;
-	struct vfsmount		*mnt;
+	struct path		path;
 	struct mutex		readlock;
 	struct sock		*peer;
 	struct sock		*other;

ipc/mqueue.c

···
 {
 	struct inode *inode;
 	struct ipc_namespace *ns = data;
-	int error;
 
 	sb->s_blocksize = PAGE_CACHE_SIZE;
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
 	sb->s_magic = MQUEUE_MAGIC;
 	sb->s_op = &mqueue_super_ops;
 
-	inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO,
-				NULL);
-	if (IS_ERR(inode)) {
-		error = PTR_ERR(inode);
-		goto out;
-	}
+	inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO, NULL);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
 
-	sb->s_root = d_alloc_root(inode);
-	if (!sb->s_root) {
-		iput(inode);
-		error = -ENOMEM;
-		goto out;
-	}
-	error = 0;
-
-out:
-	return error;
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root)
+		return -ENOMEM;
+	return 0;
 }
 
 static struct dentry *mqueue_mount(struct file_system_type *fs_type,

kernel/audit.c

···
 
 /* This is a helper-function to print the escaped d_path */
 void audit_log_d_path(struct audit_buffer *ab, const char *prefix,
-		      struct path *path)
+		      const struct path *path)
 {
 	char *p, *pathname;
 

kernel/cgroup.c

···
 
 	struct inode *inode =
 		cgroup_new_inode(S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR, sb);
-	struct dentry *dentry;
 
 	if (!inode)
 		return -ENOMEM;
···
 	inode->i_op = &cgroup_dir_inode_operations;
 	/* directories start off with i_nlink == 2 (for "." entry) */
 	inc_nlink(inode);
-	dentry = d_alloc_root(inode);
-	if (!dentry) {
-		iput(inode);
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root)
 		return -ENOMEM;
-	}
-	sb->s_root = dentry;
 	/* for everything else we want ->d_op set */
 	sb->s_d_op = &cgroup_dops;
 	return 0;

kernel/trace/trace_output.c

···
 	return ret;
 }
 
-int trace_seq_path(struct trace_seq *s, struct path *path)
+int trace_seq_path(struct trace_seq *s, const struct path *path)
 {
 	unsigned char *p;
 

mm/shmem.c

···
 int shmem_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct inode *inode;
-	struct dentry *root;
 	struct shmem_sb_info *sbinfo;
 	int err = -ENOMEM;
 
···
 		goto failed;
 	inode->i_uid = sbinfo->uid;
 	inode->i_gid = sbinfo->gid;
-	root = d_alloc_root(inode);
-	if (!root)
-		goto failed_iput;
-	sb->s_root = root;
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root)
+		goto failed;
 	return 0;
 
-failed_iput:
-	iput(inode);
 failed:
 	shmem_put_super(sb);
 	return err;

net/sunrpc/rpc_pipe.c

···
 	sb->s_time_gran = 1;
 
 	inode = rpc_get_inode(sb, S_IFDIR | 0755);
-	if (!inode)
+	sb->s_root = root = d_make_root(inode);
+	if (!root)
 		return -ENOMEM;
-	sb->s_root = root = d_alloc_root(inode);
-	if (!root) {
-		iput(inode);
-		return -ENOMEM;
-	}
 	if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL))
 		return -ENOMEM;
 	return 0;

net/unix/af_unix.c

···
 	spin_lock(&unix_table_lock);
 	sk_for_each(s, node,
 		    &unix_socket_table[i->i_ino & (UNIX_HASH_SIZE - 1)]) {
-		struct dentry *dentry = unix_sk(s)->dentry;
+		struct dentry *dentry = unix_sk(s)->path.dentry;
 
 		if (dentry && dentry->d_inode == i) {
 			sock_hold(s);
···
 static int unix_release_sock(struct sock *sk, int embrion)
 {
 	struct unix_sock *u = unix_sk(sk);
-	struct dentry *dentry;
-	struct vfsmount *mnt;
+	struct path path;
 	struct sock *skpair;
 	struct sk_buff *skb;
 	int state;
···
 	unix_state_lock(sk);
 	sock_orphan(sk);
 	sk->sk_shutdown = SHUTDOWN_MASK;
-	dentry	     = u->dentry;
-	u->dentry    = NULL;
-	mnt	     = u->mnt;
-	u->mnt	     = NULL;
+	path	     = u->path;
+	u->path.dentry = NULL;
+	u->path.mnt = NULL;
 	state = sk->sk_state;
 	sk->sk_state = TCP_CLOSE;
 	unix_state_unlock(sk);
···
 		kfree_skb(skb);
 	}
 
-	if (dentry) {
-		dput(dentry);
-		mntput(mnt);
-	}
+	if (path.dentry)
+		path_put(&path);
 
 	sock_put(sk);
 
···
 	sk->sk_max_ack_backlog	= net->unx.sysctl_max_dgram_qlen;
 	sk->sk_destruct		= unix_sock_destructor;
 	u	  = unix_sk(sk);
-	u->dentry = NULL;
-	u->mnt	  = NULL;
+	u->path.dentry = NULL;
+	u->path.mnt = NULL;
 	spin_lock_init(&u->lock);
 	atomic_long_set(&u->inflight, 0);
 	INIT_LIST_HEAD(&u->link);
···
 			goto put_fail;
 
 		if (u->sk_type == type)
-			touch_atime(path.mnt, path.dentry);
+			touch_atime(&path);
 
 		path_put(&path);
 
···
 		u = unix_find_socket_byname(net, sunname, len, type, hash);
 		if (u) {
 			struct dentry *dentry;
-			dentry = unix_sk(u)->dentry;
+			dentry = unix_sk(u)->path.dentry;
 			if (dentry)
-				touch_atime(unix_sk(u)->mnt, dentry);
+				touch_atime(&unix_sk(u)->path);
 		} else
 			goto fail;
 	}
···
 		list = &unix_socket_table[addr->hash];
 	} else {
 		list = &unix_socket_table[dentry->d_inode->i_ino & (UNIX_HASH_SIZE-1)];
-		u->dentry = path.dentry;
-		u->mnt    = path.mnt;
+		u->path = path;
 	}
 
 	err = 0;
···
 		atomic_inc(&otheru->addr->refcnt);
 		newu->addr = otheru->addr;
 	}
-	if (otheru->dentry) {
-		newu->dentry	= dget(otheru->dentry);
-		newu->mnt	= mntget(otheru->mnt);
+	if (otheru->path.dentry) {
+		path_get(&otheru->path);
+		newu->path = otheru->path;
 	}
 
 	/* Set credentials */

net/unix/diag.c

···
 
 static int sk_diag_dump_vfs(struct sock *sk, struct sk_buff *nlskb)
 {
-	struct dentry *dentry = unix_sk(sk)->dentry;
+	struct dentry *dentry = unix_sk(sk)->path.dentry;
 	struct unix_diag_vfs *uv;
 
 	if (dentry) {

security/lsm_audit.c

···
 			}
 			case AF_UNIX:
 				u = unix_sk(sk);
-				if (u->dentry) {
-					struct path path = {
-						.dentry = u->dentry,
-						.mnt = u->mnt
-					};
-					audit_log_d_path(ab, " path=", &path);
+				if (u->path.dentry) {
+					audit_log_d_path(ab, " path=", &u->path);
 					break;
 				}
 				if (!u->addr)