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1/*
2 * linux/include/linux/ext3_fs.h
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *
9 * from
10 *
11 * linux/include/linux/minix_fs.h
12 *
13 * Copyright (C) 1991, 1992 Linus Torvalds
14 */
15
16#ifndef _LINUX_EXT3_FS_H
17#define _LINUX_EXT3_FS_H
18
19#include <linux/types.h>
20#include <linux/ext3_fs_i.h>
21#include <linux/ext3_fs_sb.h>
22
23
24struct statfs;
25
26/*
27 * The second extended filesystem constants/structures
28 */
29
30/*
31 * Define EXT3FS_DEBUG to produce debug messages
32 */
33#undef EXT3FS_DEBUG
34
35/*
36 * Define EXT3_RESERVATION to reserve data blocks for expanding files
37 */
38#define EXT3_DEFAULT_RESERVE_BLOCKS 8
39#define EXT3_MAX_RESERVE_BLOCKS 1024
40#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
41/*
42 * Always enable hashed directories
43 */
44#define CONFIG_EXT3_INDEX
45
46/*
47 * Debug code
48 */
49#ifdef EXT3FS_DEBUG
50#define ext3_debug(f, a...) \
51 do { \
52 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
53 __FILE__, __LINE__, __FUNCTION__); \
54 printk (KERN_DEBUG f, ## a); \
55 } while (0)
56#else
57#define ext3_debug(f, a...) do {} while (0)
58#endif
59
60/*
61 * Special inodes numbers
62 */
63#define EXT3_BAD_INO 1 /* Bad blocks inode */
64#define EXT3_ROOT_INO 2 /* Root inode */
65#define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
66#define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
67#define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
68#define EXT3_JOURNAL_INO 8 /* Journal inode */
69
70/* First non-reserved inode for old ext3 filesystems */
71#define EXT3_GOOD_OLD_FIRST_INO 11
72
73/*
74 * The second extended file system magic number
75 */
76#define EXT3_SUPER_MAGIC 0xEF53
77
78/*
79 * Maximal count of links to a file
80 */
81#define EXT3_LINK_MAX 32000
82
83/*
84 * Macro-instructions used to manage several block sizes
85 */
86#define EXT3_MIN_BLOCK_SIZE 1024
87#define EXT3_MAX_BLOCK_SIZE 4096
88#define EXT3_MIN_BLOCK_LOG_SIZE 10
89#ifdef __KERNEL__
90# define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
91#else
92# define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
93#endif
94#define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
95#ifdef __KERNEL__
96# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
97#else
98# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
99#endif
100#ifdef __KERNEL__
101#define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
102#define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
103#define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
104#else
105#define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
106 EXT3_GOOD_OLD_INODE_SIZE : \
107 (s)->s_inode_size)
108#define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
109 EXT3_GOOD_OLD_FIRST_INO : \
110 (s)->s_first_ino)
111#endif
112
113/*
114 * Macro-instructions used to manage fragments
115 */
116#define EXT3_MIN_FRAG_SIZE 1024
117#define EXT3_MAX_FRAG_SIZE 4096
118#define EXT3_MIN_FRAG_LOG_SIZE 10
119#ifdef __KERNEL__
120# define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
121# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
122#else
123# define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
124# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
125#endif
126
127/*
128 * Structure of a blocks group descriptor
129 */
130struct ext3_group_desc
131{
132 __le32 bg_block_bitmap; /* Blocks bitmap block */
133 __le32 bg_inode_bitmap; /* Inodes bitmap block */
134 __le32 bg_inode_table; /* Inodes table block */
135 __le16 bg_free_blocks_count; /* Free blocks count */
136 __le16 bg_free_inodes_count; /* Free inodes count */
137 __le16 bg_used_dirs_count; /* Directories count */
138 __u16 bg_pad;
139 __le32 bg_reserved[3];
140};
141
142/*
143 * Macro-instructions used to manage group descriptors
144 */
145#ifdef __KERNEL__
146# define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
147# define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
148# define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
149# define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
150#else
151# define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
152# define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
153# define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
154#endif
155
156/*
157 * Constants relative to the data blocks
158 */
159#define EXT3_NDIR_BLOCKS 12
160#define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
161#define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
162#define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
163#define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
164
165/*
166 * Inode flags
167 */
168#define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
169#define EXT3_UNRM_FL 0x00000002 /* Undelete */
170#define EXT3_COMPR_FL 0x00000004 /* Compress file */
171#define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
172#define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
173#define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
174#define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
175#define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
176/* Reserved for compression usage... */
177#define EXT3_DIRTY_FL 0x00000100
178#define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
179#define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
180#define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
181/* End compression flags --- maybe not all used */
182#define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
183#define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
184#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
185#define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
186#define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
187#define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
188#define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
189
190#define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
191#define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
192
193/*
194 * Inode dynamic state flags
195 */
196#define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
197#define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
198#define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */
199
200/* Used to pass group descriptor data when online resize is done */
201struct ext3_new_group_input {
202 __u32 group; /* Group number for this data */
203 __u32 block_bitmap; /* Absolute block number of block bitmap */
204 __u32 inode_bitmap; /* Absolute block number of inode bitmap */
205 __u32 inode_table; /* Absolute block number of inode table start */
206 __u32 blocks_count; /* Total number of blocks in this group */
207 __u16 reserved_blocks; /* Number of reserved blocks in this group */
208 __u16 unused;
209};
210
211/* The struct ext3_new_group_input in kernel space, with free_blocks_count */
212struct ext3_new_group_data {
213 __u32 group;
214 __u32 block_bitmap;
215 __u32 inode_bitmap;
216 __u32 inode_table;
217 __u32 blocks_count;
218 __u16 reserved_blocks;
219 __u16 unused;
220 __u32 free_blocks_count;
221};
222
223
224/*
225 * ioctl commands
226 */
227#define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
228#define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
229#define EXT3_IOC_GETVERSION _IOR('f', 3, long)
230#define EXT3_IOC_SETVERSION _IOW('f', 4, long)
231#define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
232#define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
233#define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
234#define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
235#ifdef CONFIG_JBD_DEBUG
236#define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
237#endif
238#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
239#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
240
241/*
242 * Structure of an inode on the disk
243 */
244struct ext3_inode {
245 __le16 i_mode; /* File mode */
246 __le16 i_uid; /* Low 16 bits of Owner Uid */
247 __le32 i_size; /* Size in bytes */
248 __le32 i_atime; /* Access time */
249 __le32 i_ctime; /* Creation time */
250 __le32 i_mtime; /* Modification time */
251 __le32 i_dtime; /* Deletion Time */
252 __le16 i_gid; /* Low 16 bits of Group Id */
253 __le16 i_links_count; /* Links count */
254 __le32 i_blocks; /* Blocks count */
255 __le32 i_flags; /* File flags */
256 union {
257 struct {
258 __u32 l_i_reserved1;
259 } linux1;
260 struct {
261 __u32 h_i_translator;
262 } hurd1;
263 struct {
264 __u32 m_i_reserved1;
265 } masix1;
266 } osd1; /* OS dependent 1 */
267 __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
268 __le32 i_generation; /* File version (for NFS) */
269 __le32 i_file_acl; /* File ACL */
270 __le32 i_dir_acl; /* Directory ACL */
271 __le32 i_faddr; /* Fragment address */
272 union {
273 struct {
274 __u8 l_i_frag; /* Fragment number */
275 __u8 l_i_fsize; /* Fragment size */
276 __u16 i_pad1;
277 __le16 l_i_uid_high; /* these 2 fields */
278 __le16 l_i_gid_high; /* were reserved2[0] */
279 __u32 l_i_reserved2;
280 } linux2;
281 struct {
282 __u8 h_i_frag; /* Fragment number */
283 __u8 h_i_fsize; /* Fragment size */
284 __u16 h_i_mode_high;
285 __u16 h_i_uid_high;
286 __u16 h_i_gid_high;
287 __u32 h_i_author;
288 } hurd2;
289 struct {
290 __u8 m_i_frag; /* Fragment number */
291 __u8 m_i_fsize; /* Fragment size */
292 __u16 m_pad1;
293 __u32 m_i_reserved2[2];
294 } masix2;
295 } osd2; /* OS dependent 2 */
296 __le16 i_extra_isize;
297 __le16 i_pad1;
298};
299
300#define i_size_high i_dir_acl
301
302#if defined(__KERNEL__) || defined(__linux__)
303#define i_reserved1 osd1.linux1.l_i_reserved1
304#define i_frag osd2.linux2.l_i_frag
305#define i_fsize osd2.linux2.l_i_fsize
306#define i_uid_low i_uid
307#define i_gid_low i_gid
308#define i_uid_high osd2.linux2.l_i_uid_high
309#define i_gid_high osd2.linux2.l_i_gid_high
310#define i_reserved2 osd2.linux2.l_i_reserved2
311
312#elif defined(__GNU__)
313
314#define i_translator osd1.hurd1.h_i_translator
315#define i_frag osd2.hurd2.h_i_frag;
316#define i_fsize osd2.hurd2.h_i_fsize;
317#define i_uid_high osd2.hurd2.h_i_uid_high
318#define i_gid_high osd2.hurd2.h_i_gid_high
319#define i_author osd2.hurd2.h_i_author
320
321#elif defined(__masix__)
322
323#define i_reserved1 osd1.masix1.m_i_reserved1
324#define i_frag osd2.masix2.m_i_frag
325#define i_fsize osd2.masix2.m_i_fsize
326#define i_reserved2 osd2.masix2.m_i_reserved2
327
328#endif /* defined(__KERNEL__) || defined(__linux__) */
329
330/*
331 * File system states
332 */
333#define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
334#define EXT3_ERROR_FS 0x0002 /* Errors detected */
335#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
336
337/*
338 * Mount flags
339 */
340#define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
341#define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
342#define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
343#define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
344#define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
345#define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
346#define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
347#define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
348#define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
349#define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
350#define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
351#define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
352#define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
353#define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
354#define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
355#define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
356#define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
357#define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
358#define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
359#define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
360#define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
361
362/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
363#ifndef _LINUX_EXT2_FS_H
364#define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
365#define set_opt(o, opt) o |= EXT3_MOUNT_##opt
366#define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
367 EXT3_MOUNT_##opt)
368#else
369#define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
370#define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
371#define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
372#endif
373
374#define ext3_set_bit ext2_set_bit
375#define ext3_set_bit_atomic ext2_set_bit_atomic
376#define ext3_clear_bit ext2_clear_bit
377#define ext3_clear_bit_atomic ext2_clear_bit_atomic
378#define ext3_test_bit ext2_test_bit
379#define ext3_find_first_zero_bit ext2_find_first_zero_bit
380#define ext3_find_next_zero_bit ext2_find_next_zero_bit
381
382/*
383 * Maximal mount counts between two filesystem checks
384 */
385#define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
386#define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
387
388/*
389 * Behaviour when detecting errors
390 */
391#define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
392#define EXT3_ERRORS_RO 2 /* Remount fs read-only */
393#define EXT3_ERRORS_PANIC 3 /* Panic */
394#define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
395
396/*
397 * Structure of the super block
398 */
399struct ext3_super_block {
400/*00*/ __le32 s_inodes_count; /* Inodes count */
401 __le32 s_blocks_count; /* Blocks count */
402 __le32 s_r_blocks_count; /* Reserved blocks count */
403 __le32 s_free_blocks_count; /* Free blocks count */
404/*10*/ __le32 s_free_inodes_count; /* Free inodes count */
405 __le32 s_first_data_block; /* First Data Block */
406 __le32 s_log_block_size; /* Block size */
407 __le32 s_log_frag_size; /* Fragment size */
408/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
409 __le32 s_frags_per_group; /* # Fragments per group */
410 __le32 s_inodes_per_group; /* # Inodes per group */
411 __le32 s_mtime; /* Mount time */
412/*30*/ __le32 s_wtime; /* Write time */
413 __le16 s_mnt_count; /* Mount count */
414 __le16 s_max_mnt_count; /* Maximal mount count */
415 __le16 s_magic; /* Magic signature */
416 __le16 s_state; /* File system state */
417 __le16 s_errors; /* Behaviour when detecting errors */
418 __le16 s_minor_rev_level; /* minor revision level */
419/*40*/ __le32 s_lastcheck; /* time of last check */
420 __le32 s_checkinterval; /* max. time between checks */
421 __le32 s_creator_os; /* OS */
422 __le32 s_rev_level; /* Revision level */
423/*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
424 __le16 s_def_resgid; /* Default gid for reserved blocks */
425 /*
426 * These fields are for EXT3_DYNAMIC_REV superblocks only.
427 *
428 * Note: the difference between the compatible feature set and
429 * the incompatible feature set is that if there is a bit set
430 * in the incompatible feature set that the kernel doesn't
431 * know about, it should refuse to mount the filesystem.
432 *
433 * e2fsck's requirements are more strict; if it doesn't know
434 * about a feature in either the compatible or incompatible
435 * feature set, it must abort and not try to meddle with
436 * things it doesn't understand...
437 */
438 __le32 s_first_ino; /* First non-reserved inode */
439 __le16 s_inode_size; /* size of inode structure */
440 __le16 s_block_group_nr; /* block group # of this superblock */
441 __le32 s_feature_compat; /* compatible feature set */
442/*60*/ __le32 s_feature_incompat; /* incompatible feature set */
443 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
444/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
445/*78*/ char s_volume_name[16]; /* volume name */
446/*88*/ char s_last_mounted[64]; /* directory where last mounted */
447/*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
448 /*
449 * Performance hints. Directory preallocation should only
450 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
451 */
452 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
453 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
454 __u16 s_reserved_gdt_blocks; /* Per group desc for online growth */
455 /*
456 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
457 */
458/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
459/*E0*/ __le32 s_journal_inum; /* inode number of journal file */
460 __le32 s_journal_dev; /* device number of journal file */
461 __le32 s_last_orphan; /* start of list of inodes to delete */
462 __le32 s_hash_seed[4]; /* HTREE hash seed */
463 __u8 s_def_hash_version; /* Default hash version to use */
464 __u8 s_reserved_char_pad;
465 __u16 s_reserved_word_pad;
466 __le32 s_default_mount_opts;
467 __le32 s_first_meta_bg; /* First metablock block group */
468 __u32 s_reserved[190]; /* Padding to the end of the block */
469};
470
471#ifdef __KERNEL__
472static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
473{
474 return sb->s_fs_info;
475}
476static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
477{
478 return container_of(inode, struct ext3_inode_info, vfs_inode);
479}
480#else
481/* Assume that user mode programs are passing in an ext3fs superblock, not
482 * a kernel struct super_block. This will allow us to call the feature-test
483 * macros from user land. */
484#define EXT3_SB(sb) (sb)
485#endif
486
487#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
488
489/*
490 * Codes for operating systems
491 */
492#define EXT3_OS_LINUX 0
493#define EXT3_OS_HURD 1
494#define EXT3_OS_MASIX 2
495#define EXT3_OS_FREEBSD 3
496#define EXT3_OS_LITES 4
497
498/*
499 * Revision levels
500 */
501#define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
502#define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
503
504#define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
505#define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
506
507#define EXT3_GOOD_OLD_INODE_SIZE 128
508
509/*
510 * Feature set definitions
511 */
512
513#define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
514 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
515#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
516 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
517#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
518 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
519#define EXT3_SET_COMPAT_FEATURE(sb,mask) \
520 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
521#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
522 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
523#define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
524 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
525#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
526 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
527#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
528 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
529#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
530 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
531
532#define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
533#define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
534#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
535#define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
536#define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
537#define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
538
539#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
540#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
541#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
542
543#define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
544#define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
545#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
546#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
547#define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
548
549#define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
550#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
551 EXT3_FEATURE_INCOMPAT_RECOVER| \
552 EXT3_FEATURE_INCOMPAT_META_BG)
553#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
554 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
555 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
556
557/*
558 * Default values for user and/or group using reserved blocks
559 */
560#define EXT3_DEF_RESUID 0
561#define EXT3_DEF_RESGID 0
562
563/*
564 * Default mount options
565 */
566#define EXT3_DEFM_DEBUG 0x0001
567#define EXT3_DEFM_BSDGROUPS 0x0002
568#define EXT3_DEFM_XATTR_USER 0x0004
569#define EXT3_DEFM_ACL 0x0008
570#define EXT3_DEFM_UID16 0x0010
571#define EXT3_DEFM_JMODE 0x0060
572#define EXT3_DEFM_JMODE_DATA 0x0020
573#define EXT3_DEFM_JMODE_ORDERED 0x0040
574#define EXT3_DEFM_JMODE_WBACK 0x0060
575
576/*
577 * Structure of a directory entry
578 */
579#define EXT3_NAME_LEN 255
580
581struct ext3_dir_entry {
582 __le32 inode; /* Inode number */
583 __le16 rec_len; /* Directory entry length */
584 __le16 name_len; /* Name length */
585 char name[EXT3_NAME_LEN]; /* File name */
586};
587
588/*
589 * The new version of the directory entry. Since EXT3 structures are
590 * stored in intel byte order, and the name_len field could never be
591 * bigger than 255 chars, it's safe to reclaim the extra byte for the
592 * file_type field.
593 */
594struct ext3_dir_entry_2 {
595 __le32 inode; /* Inode number */
596 __le16 rec_len; /* Directory entry length */
597 __u8 name_len; /* Name length */
598 __u8 file_type;
599 char name[EXT3_NAME_LEN]; /* File name */
600};
601
602/*
603 * Ext3 directory file types. Only the low 3 bits are used. The
604 * other bits are reserved for now.
605 */
606#define EXT3_FT_UNKNOWN 0
607#define EXT3_FT_REG_FILE 1
608#define EXT3_FT_DIR 2
609#define EXT3_FT_CHRDEV 3
610#define EXT3_FT_BLKDEV 4
611#define EXT3_FT_FIFO 5
612#define EXT3_FT_SOCK 6
613#define EXT3_FT_SYMLINK 7
614
615#define EXT3_FT_MAX 8
616
617/*
618 * EXT3_DIR_PAD defines the directory entries boundaries
619 *
620 * NOTE: It must be a multiple of 4
621 */
622#define EXT3_DIR_PAD 4
623#define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
624#define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
625 ~EXT3_DIR_ROUND)
626/*
627 * Hash Tree Directory indexing
628 * (c) Daniel Phillips, 2001
629 */
630
631#ifdef CONFIG_EXT3_INDEX
632 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
633 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
634 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
635#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
636#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
637#else
638 #define is_dx(dir) 0
639#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
640#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
641#endif
642
643/* Legal values for the dx_root hash_version field: */
644
645#define DX_HASH_LEGACY 0
646#define DX_HASH_HALF_MD4 1
647#define DX_HASH_TEA 2
648
649/* hash info structure used by the directory hash */
650struct dx_hash_info
651{
652 u32 hash;
653 u32 minor_hash;
654 int hash_version;
655 u32 *seed;
656};
657
658#define EXT3_HTREE_EOF 0x7fffffff
659
660#ifdef __KERNEL__
661/*
662 * Control parameters used by ext3_htree_next_block
663 */
664#define HASH_NB_ALWAYS 1
665
666
667/*
668 * Describe an inode's exact location on disk and in memory
669 */
670struct ext3_iloc
671{
672 struct buffer_head *bh;
673 unsigned long offset;
674 unsigned long block_group;
675};
676
677static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
678{
679 return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
680}
681
682/*
683 * This structure is stuffed into the struct file's private_data field
684 * for directories. It is where we put information so that we can do
685 * readdir operations in hash tree order.
686 */
687struct dir_private_info {
688 struct rb_root root;
689 struct rb_node *curr_node;
690 struct fname *extra_fname;
691 loff_t last_pos;
692 __u32 curr_hash;
693 __u32 curr_minor_hash;
694 __u32 next_hash;
695};
696
697/*
698 * Special error return code only used by dx_probe() and its callers.
699 */
700#define ERR_BAD_DX_DIR -75000
701
702/*
703 * Function prototypes
704 */
705
706/*
707 * Ok, these declarations are also in <linux/kernel.h> but none of the
708 * ext3 source programs needs to include it so they are duplicated here.
709 */
710# define NORET_TYPE /**/
711# define ATTRIB_NORET __attribute__((noreturn))
712# define NORET_AND noreturn,
713
714/* balloc.c */
715extern int ext3_bg_has_super(struct super_block *sb, int group);
716extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
717extern int ext3_new_block (handle_t *, struct inode *, unsigned long, int *);
718extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long,
719 unsigned long);
720extern void ext3_free_blocks_sb (handle_t *, struct super_block *,
721 unsigned long, unsigned long, int *);
722extern unsigned long ext3_count_free_blocks (struct super_block *);
723extern void ext3_check_blocks_bitmap (struct super_block *);
724extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
725 unsigned int block_group,
726 struct buffer_head ** bh);
727extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
728extern void ext3_init_block_alloc_info(struct inode *);
729extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
730
731/* dir.c */
732extern int ext3_check_dir_entry(const char *, struct inode *,
733 struct ext3_dir_entry_2 *,
734 struct buffer_head *, unsigned long);
735extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
736 __u32 minor_hash,
737 struct ext3_dir_entry_2 *dirent);
738extern void ext3_htree_free_dir_info(struct dir_private_info *p);
739
740/* fsync.c */
741extern int ext3_sync_file (struct file *, struct dentry *, int);
742
743/* hash.c */
744extern int ext3fs_dirhash(const char *name, int len, struct
745 dx_hash_info *hinfo);
746
747/* ialloc.c */
748extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
749extern void ext3_free_inode (handle_t *, struct inode *);
750extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
751extern unsigned long ext3_count_free_inodes (struct super_block *);
752extern unsigned long ext3_count_dirs (struct super_block *);
753extern void ext3_check_inodes_bitmap (struct super_block *);
754extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
755
756
757/* inode.c */
758extern int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int);
759extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
760extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
761
762extern void ext3_read_inode (struct inode *);
763extern int ext3_write_inode (struct inode *, int);
764extern int ext3_setattr (struct dentry *, struct iattr *);
765extern void ext3_delete_inode (struct inode *);
766extern int ext3_sync_inode (handle_t *, struct inode *);
767extern void ext3_discard_reservation (struct inode *);
768extern void ext3_dirty_inode(struct inode *);
769extern int ext3_change_inode_journal_flag(struct inode *, int);
770extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
771extern void ext3_truncate (struct inode *);
772extern void ext3_set_inode_flags(struct inode *);
773extern void ext3_set_aops(struct inode *inode);
774
775/* ioctl.c */
776extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
777 unsigned long);
778
779/* namei.c */
780extern int ext3_orphan_add(handle_t *, struct inode *);
781extern int ext3_orphan_del(handle_t *, struct inode *);
782extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
783 __u32 start_minor_hash, __u32 *next_hash);
784
785/* resize.c */
786extern int ext3_group_add(struct super_block *sb,
787 struct ext3_new_group_data *input);
788extern int ext3_group_extend(struct super_block *sb,
789 struct ext3_super_block *es,
790 unsigned long n_blocks_count);
791
792/* super.c */
793extern void ext3_error (struct super_block *, const char *, const char *, ...)
794 __attribute__ ((format (printf, 3, 4)));
795extern void __ext3_std_error (struct super_block *, const char *, int);
796extern void ext3_abort (struct super_block *, const char *, const char *, ...)
797 __attribute__ ((format (printf, 3, 4)));
798extern void ext3_warning (struct super_block *, const char *, const char *, ...)
799 __attribute__ ((format (printf, 3, 4)));
800extern void ext3_update_dynamic_rev (struct super_block *sb);
801
802#define ext3_std_error(sb, errno) \
803do { \
804 if ((errno)) \
805 __ext3_std_error((sb), __FUNCTION__, (errno)); \
806} while (0)
807
808/*
809 * Inodes and files operations
810 */
811
812/* dir.c */
813extern struct file_operations ext3_dir_operations;
814
815/* file.c */
816extern struct inode_operations ext3_file_inode_operations;
817extern struct file_operations ext3_file_operations;
818
819/* namei.c */
820extern struct inode_operations ext3_dir_inode_operations;
821extern struct inode_operations ext3_special_inode_operations;
822
823/* symlink.c */
824extern struct inode_operations ext3_symlink_inode_operations;
825extern struct inode_operations ext3_fast_symlink_inode_operations;
826
827
828#endif /* __KERNEL__ */
829
830#endif /* _LINUX_EXT3_FS_H */