Merge tag 'for-linus-4.14-ofs2' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:
"Some cleanups and a big bug fix for ACLs.

When I was reviewing Jan Kara's ACL patch, I realized that Orangefs
ACL code was busted, not just in the kernel module, but in the server
as well. I've been working on the code in the server mostly, but
here's one kernel patch, there will be more"

* tag 'for-linus-4.14-ofs2' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
orangefs: Adjust three checks for null pointers
orangefs: Use kcalloc() in orangefs_prepare_cdm_array()
orangefs: Delete error messages for a failed memory allocation in five functions
orangefs: constify xattr_handler structure
orangefs: don't call filemap_write_and_wait from fsync
orangefs: off by ones in xattr size checks
orangefs: documentation clean up
orangefs: react properly to posix_acl_update_mode's aftermath.
orangefs: Don't clear SGID when inheriting ACLs

Documentation/filesystems/orangefs.txt

···
 BUILDING THE USERSPACE FILESYSTEM ON A SINGLE SERVER
 ====================================================
 
-When Orangefs is upstream, "--with-kernel" shouldn't be needed, but
-until then the path to where the kernel with the Orangefs kernel client
-patch was built is needed to ensure that pvfs2-client-core (the bridge
-between kernel space and user space) will build properly. You can omit
---prefix if you don't care that things are sprinkled around in
-/usr/local.
+You can omit --prefix if you don't care that things are sprinkled around in
+/usr/local. As of version 2.9.6, Orangefs uses Berkeley DB by default, we
+will probably be changing the default to lmdb soon.
 
-./configure --prefix=/opt/ofs --with-kernel=/path/to/orangefs/kernel
+./configure --prefix=/opt/ofs --with-db-backend=lmdb
 
 make
 
···
 prove things are working with:
 
 /opt/osf/bin/pvfs2-ls /mymountpoint
-
-You might not want to enforce selinux, it doesn't seem to matter by
-linux 3.11...
 
 If stuff seems to be working, turn on the client core:
 /opt/osf/sbin/pvfs2-client -p /opt/osf/sbin/pvfs2-client-core

fs/orangefs/acl.c

···
 	 * I don't do that for now.
 	 */
 	value = kmalloc(ORANGEFS_MAX_XATTR_VALUELEN, GFP_KERNEL);
-	if (value == NULL)
+	if (!value)
 		return ERR_PTR(-ENOMEM);
 
 	gossip_debug(GOSSIP_ACL_DEBUG,
···
 	return acl;
 }
 
-int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+static int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl,
+			      int type)
 {
-	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	int error = 0;
 	void *value = NULL;
 	size_t size = 0;
···
 	switch (type) {
 	case ACL_TYPE_ACCESS:
 		name = XATTR_NAME_POSIX_ACL_ACCESS;
-		if (acl) {
-			umode_t mode;
-
-			error = posix_acl_update_mode(inode, &mode, &acl);
-			if (error) {
-				gossip_err("%s: posix_acl_update_mode err: %d\n",
-					   __func__,
-					   error);
-				return error;
-			}
-
-			if (inode->i_mode != mode)
-				SetModeFlag(orangefs_inode);
-			inode->i_mode = mode;
-			mark_inode_dirty_sync(inode);
-		}
 		break;
 	case ACL_TYPE_DEFAULT:
 		name = XATTR_NAME_POSIX_ACL_DEFAULT;
···
 	return error;
 }
 
+int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+{
+	int error;
+	struct iattr iattr;
+	int rc;
+
+	if (type == ACL_TYPE_ACCESS && acl) {
+		/*
+		 * posix_acl_update_mode checks to see if the permissions
+		 * described by the ACL can be encoded into the
+		 * object's mode. If so, it sets "acl" to NULL
+		 * and "mode" to the new desired value. It is up to
+		 * us to propagate the new mode back to the server...
+		 */
+		error = posix_acl_update_mode(inode, &iattr.ia_mode, &acl);
+		if (error) {
+			gossip_err("%s: posix_acl_update_mode err: %d\n",
+				   __func__,
+				   error);
+			return error;
+		}
+
+		if (acl) {
+			rc = __orangefs_set_acl(inode, acl, type);
+		} else {
+			iattr.ia_valid = ATTR_MODE;
+			rc = orangefs_inode_setattr(inode, &iattr);
+		}
+
+		return rc;
+
+	} else {
+		return -EINVAL;
+	}
+}
+
 int orangefs_init_acl(struct inode *inode, struct inode *dir)
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
···
 		return error;
 
 	if (default_acl) {
-		error = orangefs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+		error = __orangefs_set_acl(inode, default_acl,
+					   ACL_TYPE_DEFAULT);
 		posix_acl_release(default_acl);
 	}
 
 	if (acl) {
 		if (!error)
-			error = orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
+			error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
 		posix_acl_release(acl);
 	}
 

fs/orangefs/devorangefs-req.c

···
 	if (op->downcall.type != ORANGEFS_VFS_OP_READDIR)
 		goto wakeup;
 
-	op->downcall.trailer_buf =
-		vmalloc(op->downcall.trailer_size);
-	if (op->downcall.trailer_buf == NULL) {
-		gossip_err("%s: failed trailer vmalloc.\n",
-			   __func__);
+	op->downcall.trailer_buf = vmalloc(op->downcall.trailer_size);
+	if (!op->downcall.trailer_buf)
 		goto Enomem;
-	}
+
 	memset(op->downcall.trailer_buf, 0, op->downcall.trailer_size);
 	if (!copy_from_iter_full(op->downcall.trailer_buf,
 			         op->downcall.trailer_size, iter)) {

fs/orangefs/file.c

···
 		       loff_t end,
 		       int datasync)
 {
-	int ret = -EINVAL;
+	int ret;
 	struct orangefs_inode_s *orangefs_inode =
 		ORANGEFS_I(file_inode(file));
 	struct orangefs_kernel_op_s *new_op = NULL;
-
-	/* required call */
-	filemap_write_and_wait_range(file->f_mapping, start, end);
 
 	new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
 	if (!new_op)

fs/orangefs/orangefs-bufmap.c

···
 
 	bufmap->buffer_index_array =
 		kzalloc(DIV_ROUND_UP(bufmap->desc_count, BITS_PER_LONG), GFP_KERNEL);
-	if (!bufmap->buffer_index_array) {
-		gossip_err("orangefs: could not allocate %d buffer indices\n",
-				bufmap->desc_count);
+	if (!bufmap->buffer_index_array)
 		goto out_free_bufmap;
-	}
 
 	bufmap->desc_array =
 		kcalloc(bufmap->desc_count, sizeof(struct orangefs_bufmap_desc),
 			GFP_KERNEL);
-	if (!bufmap->desc_array) {
-		gossip_err("orangefs: could not allocate %d descriptors\n",
-				bufmap->desc_count);
+	if (!bufmap->desc_array)
 		goto out_free_index_array;
-	}
 
 	bufmap->page_count = bufmap->total_size / PAGE_SIZE;
 

fs/orangefs/orangefs-debugfs.c

···
 		goto out;
 	}
 
-	cdm_array =
-		kzalloc(cdm_element_count * sizeof(struct client_debug_mask),
-			GFP_KERNEL);
+	cdm_array = kcalloc(cdm_element_count, sizeof(*cdm_array), GFP_KERNEL);
 	if (!cdm_array) {
-		pr_info("malloc failed for cdm_array!\n");
 		rc = -ENOMEM;
 		goto out;
 	}

fs/orangefs/orangefs-mod.c

···
 	orangefs_htable_ops_in_progress =
 	    kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
 	if (!orangefs_htable_ops_in_progress) {
-		gossip_err("Failed to initialize op hashtable");
 		ret = -ENOMEM;
 		goto cleanup_inode;
 	}

fs/orangefs/super.c

···
 	struct orangefs_inode_s *orangefs_inode;
 
 	orangefs_inode = kmem_cache_alloc(orangefs_inode_cache, GFP_KERNEL);
-	if (orangefs_inode == NULL) {
-		gossip_err("Failed to allocate orangefs_inode\n");
+	if (!orangefs_inode)
 		return NULL;
-	}
 
 	/*
 	 * We want to clear everything except for rw_semaphore and the

fs/orangefs/xattr.c

···
 	if (S_ISLNK(inode->i_mode))
 		return -EOPNOTSUPP;
 
-	if (strlen(name) > ORANGEFS_MAX_XATTR_NAMELEN)
+	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
 		return -EINVAL;
 
 	fsuid = from_kuid(&init_user_ns, current_fsuid());
···
 	struct orangefs_kernel_op_s *new_op = NULL;
 	int ret = -ENOMEM;
 
-	if (strlen(name) > ORANGEFS_MAX_XATTR_NAMELEN)
+	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
 		return -EINVAL;
 
 	down_write(&orangefs_inode->xattr_sem);
···
 
 	if (size > ORANGEFS_MAX_XATTR_VALUELEN)
 		return -EINVAL;
-	if (strlen(name) > ORANGEFS_MAX_XATTR_NAMELEN)
+	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
 		return -EINVAL;
 
 	internal_flag = convert_to_internal_xattr_flags(flags);
 
 	/* This is equivalent to a removexattr */
-	if (size == 0 && value == NULL) {
+	if (size == 0 && !value) {
 		gossip_debug(GOSSIP_XATTR_DEBUG,
 			     "removing xattr (%s)\n",
 			     name);
···
 	int i = 0;
 	int returned_count = 0;
 
-	if (size > 0 && buffer == NULL) {
+	if (size > 0 && !buffer) {
 		gossip_err("%s: bogus NULL pointers\n", __func__);
 		return -EINVAL;
 	}
···
 
 }
 
-static struct xattr_handler orangefs_xattr_default_handler = {
+static const struct xattr_handler orangefs_xattr_default_handler = {
 	.prefix = "",  /* match any name => handlers called with full name */
 	.get = orangefs_xattr_get_default,
 	.set = orangefs_xattr_set_default,