1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Creates, reads, walks and deletes directory-nodes
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * Portions of this code from linux/fs/ext3/dir.c
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise pascal
15 * Universite Pierre et Marie Curie (Paris VI)
19 * linux/fs/minix/dir.c
21 * Copyright (C) 1991, 1992 Linux Torvalds
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
33 * You should have received a copy of the GNU General Public
34 * License along with this program; if not, write to the
35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36 * Boston, MA 021110-1307, USA.
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
44 #define MLOG_MASK_PREFIX ML_NAMEI
45 #include <cluster/masklog.h>
52 #include "extent_map.h"
61 #include "buffer_head_io.h"
63 #define NAMEI_RA_CHUNKS 2
64 #define NAMEI_RA_BLOCKS 4
65 #define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
66 #define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b))
68 static unsigned char ocfs2_filetype_table
[] = {
69 DT_UNKNOWN
, DT_REG
, DT_DIR
, DT_CHR
, DT_BLK
, DT_FIFO
, DT_SOCK
, DT_LNK
72 static int ocfs2_extend_dir(struct ocfs2_super
*osb
,
74 struct buffer_head
*parent_fe_bh
,
75 unsigned int blocks_wanted
,
76 struct buffer_head
**new_de_bh
);
77 static int ocfs2_do_extend_dir(struct super_block
*sb
,
80 struct buffer_head
*parent_fe_bh
,
81 struct ocfs2_alloc_context
*data_ac
,
82 struct ocfs2_alloc_context
*meta_ac
,
83 struct buffer_head
**new_bh
);
86 * bh passed here can be an inode block or a dir data block, depending
87 * on the inode inline data flag.
89 static int ocfs2_check_dir_entry(struct inode
* dir
,
90 struct ocfs2_dir_entry
* de
,
91 struct buffer_head
* bh
,
94 const char *error_msg
= NULL
;
95 const int rlen
= le16_to_cpu(de
->rec_len
);
97 if (rlen
< OCFS2_DIR_REC_LEN(1))
98 error_msg
= "rec_len is smaller than minimal";
99 else if (rlen
% 4 != 0)
100 error_msg
= "rec_len % 4 != 0";
101 else if (rlen
< OCFS2_DIR_REC_LEN(de
->name_len
))
102 error_msg
= "rec_len is too small for name_len";
103 else if (((char *) de
- bh
->b_data
) + rlen
> dir
->i_sb
->s_blocksize
)
104 error_msg
= "directory entry across blocks";
106 if (error_msg
!= NULL
)
107 mlog(ML_ERROR
, "bad entry in directory #%llu: %s - "
108 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n",
109 (unsigned long long)OCFS2_I(dir
)->ip_blkno
, error_msg
,
110 offset
, (unsigned long long)le64_to_cpu(de
->inode
), rlen
,
112 return error_msg
== NULL
? 1 : 0;
115 static inline int ocfs2_match(int len
,
116 const char * const name
,
117 struct ocfs2_dir_entry
*de
)
119 if (len
!= de
->name_len
)
123 return !memcmp(name
, de
->name
, len
);
127 * Returns 0 if not found, -1 on failure, and 1 on success
129 static int inline ocfs2_search_dirblock(struct buffer_head
*bh
,
131 const char *name
, int namelen
,
132 unsigned long offset
,
135 struct ocfs2_dir_entry
**res_dir
)
137 struct ocfs2_dir_entry
*de
;
138 char *dlimit
, *de_buf
;
145 dlimit
= de_buf
+ bytes
;
147 while (de_buf
< dlimit
) {
148 /* this code is executed quadratically often */
149 /* do minimal checking `by hand' */
151 de
= (struct ocfs2_dir_entry
*) de_buf
;
153 if (de_buf
+ namelen
<= dlimit
&&
154 ocfs2_match(namelen
, name
, de
)) {
155 /* found a match - just to be sure, do a full check */
156 if (!ocfs2_check_dir_entry(dir
, de
, bh
, offset
)) {
165 /* prevent looping on a bad block */
166 de_len
= le16_to_cpu(de
->rec_len
);
181 static struct buffer_head
*ocfs2_find_entry_id(const char *name
,
184 struct ocfs2_dir_entry
**res_dir
)
187 struct buffer_head
*di_bh
= NULL
;
188 struct ocfs2_dinode
*di
;
189 struct ocfs2_inline_data
*data
;
191 ret
= ocfs2_read_inode_block(dir
, &di_bh
);
197 di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
198 data
= &di
->id2
.i_data
;
200 found
= ocfs2_search_dirblock(di_bh
, dir
, name
, namelen
, 0,
201 data
->id_data
, i_size_read(dir
), res_dir
);
210 static int ocfs2_validate_dir_block(struct super_block
*sb
,
211 struct buffer_head
*bh
)
214 * Nothing yet. We don't validate dirents here, that's handled
215 * in-place when the code walks them.
217 mlog(0, "Validating dirblock %llu\n",
218 (unsigned long long)bh
->b_blocknr
);
224 * This function forces all errors to -EIO for consistency with its
225 * predecessor, ocfs2_bread(). We haven't audited what returning the
226 * real error codes would do to callers. We log the real codes with
227 * mlog_errno() before we squash them.
229 static int ocfs2_read_dir_block(struct inode
*inode
, u64 v_block
,
230 struct buffer_head
**bh
, int flags
)
233 struct buffer_head
*tmp
= *bh
;
235 rc
= ocfs2_read_virt_blocks(inode
, v_block
, 1, &tmp
, flags
,
236 ocfs2_validate_dir_block
);
240 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
244 return rc
? -EIO
: 0;
247 static struct buffer_head
*ocfs2_find_entry_el(const char *name
, int namelen
,
249 struct ocfs2_dir_entry
**res_dir
)
251 struct super_block
*sb
;
252 struct buffer_head
*bh_use
[NAMEI_RA_SIZE
];
253 struct buffer_head
*bh
, *ret
= NULL
;
254 unsigned long start
, block
, b
;
255 int ra_max
= 0; /* Number of bh's in the readahead
257 int ra_ptr
= 0; /* Current index into readahead
266 nblocks
= i_size_read(dir
) >> sb
->s_blocksize_bits
;
267 start
= OCFS2_I(dir
)->ip_dir_start_lookup
;
268 if (start
>= nblocks
)
275 * We deal with the read-ahead logic here.
277 if (ra_ptr
>= ra_max
) {
278 /* Refill the readahead buffer */
281 for (ra_max
= 0; ra_max
< NAMEI_RA_SIZE
; ra_max
++) {
283 * Terminate if we reach the end of the
284 * directory and must wrap, or if our
285 * search has finished at this block.
287 if (b
>= nblocks
|| (num
&& block
== start
)) {
288 bh_use
[ra_max
] = NULL
;
294 err
= ocfs2_read_dir_block(dir
, b
++, &bh
,
299 if ((bh
= bh_use
[ra_ptr
++]) == NULL
)
301 if (ocfs2_read_dir_block(dir
, block
, &bh
, 0)) {
302 /* read error, skip block & hope for the best.
303 * ocfs2_read_dir_block() has released the bh. */
304 ocfs2_error(dir
->i_sb
, "reading directory %llu, "
306 (unsigned long long)OCFS2_I(dir
)->ip_blkno
,
310 i
= ocfs2_search_dirblock(bh
, dir
, name
, namelen
,
311 block
<< sb
->s_blocksize_bits
,
312 bh
->b_data
, sb
->s_blocksize
,
315 OCFS2_I(dir
)->ip_dir_start_lookup
= block
;
317 goto cleanup_and_exit
;
321 goto cleanup_and_exit
;
324 if (++block
>= nblocks
)
326 } while (block
!= start
);
329 * If the directory has grown while we were searching, then
330 * search the last part of the directory before giving up.
333 nblocks
= i_size_read(dir
) >> sb
->s_blocksize_bits
;
334 if (block
< nblocks
) {
340 /* Clean up the read-ahead blocks */
341 for (; ra_ptr
< ra_max
; ra_ptr
++)
342 brelse(bh_use
[ra_ptr
]);
349 * Try to find an entry of the provided name within 'dir'.
351 * If nothing was found, NULL is returned. Otherwise, a buffer_head
352 * and pointer to the dir entry are passed back.
354 * Caller can NOT assume anything about the contents of the
355 * buffer_head - it is passed back only so that it can be passed into
356 * any one of the manipulation functions (add entry, delete entry,
357 * etc). As an example, bh in the extent directory case is a data
358 * block, in the inline-data case it actually points to an inode.
360 struct buffer_head
*ocfs2_find_entry(const char *name
, int namelen
,
362 struct ocfs2_dir_entry
**res_dir
)
366 if (OCFS2_I(dir
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
)
367 return ocfs2_find_entry_id(name
, namelen
, dir
, res_dir
);
369 return ocfs2_find_entry_el(name
, namelen
, dir
, res_dir
);
373 * Update inode number and type of a previously found directory entry.
375 int ocfs2_update_entry(struct inode
*dir
, handle_t
*handle
,
376 struct buffer_head
*de_bh
, struct ocfs2_dir_entry
*de
,
377 struct inode
*new_entry_inode
)
382 * The same code works fine for both inline-data and extent
383 * based directories, so no need to split this up.
386 ret
= ocfs2_journal_access(handle
, dir
, de_bh
,
387 OCFS2_JOURNAL_ACCESS_WRITE
);
393 de
->inode
= cpu_to_le64(OCFS2_I(new_entry_inode
)->ip_blkno
);
394 ocfs2_set_de_type(de
, new_entry_inode
->i_mode
);
396 ocfs2_journal_dirty(handle
, de_bh
);
402 static int __ocfs2_delete_entry(handle_t
*handle
, struct inode
*dir
,
403 struct ocfs2_dir_entry
*de_del
,
404 struct buffer_head
*bh
, char *first_de
,
407 struct ocfs2_dir_entry
*de
, *pde
;
408 int i
, status
= -ENOENT
;
410 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle
, dir
, de_del
, bh
);
414 de
= (struct ocfs2_dir_entry
*) first_de
;
416 if (!ocfs2_check_dir_entry(dir
, de
, bh
, i
)) {
422 status
= ocfs2_journal_access(handle
, dir
, bh
,
423 OCFS2_JOURNAL_ACCESS_WRITE
);
430 le16_add_cpu(&pde
->rec_len
,
431 le16_to_cpu(de
->rec_len
));
435 status
= ocfs2_journal_dirty(handle
, bh
);
438 i
+= le16_to_cpu(de
->rec_len
);
440 de
= (struct ocfs2_dir_entry
*)((char *)de
+ le16_to_cpu(de
->rec_len
));
447 static inline int ocfs2_delete_entry_id(handle_t
*handle
,
449 struct ocfs2_dir_entry
*de_del
,
450 struct buffer_head
*bh
)
453 struct buffer_head
*di_bh
= NULL
;
454 struct ocfs2_dinode
*di
;
455 struct ocfs2_inline_data
*data
;
457 ret
= ocfs2_read_inode_block(dir
, &di_bh
);
463 di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
464 data
= &di
->id2
.i_data
;
466 ret
= __ocfs2_delete_entry(handle
, dir
, de_del
, bh
, data
->id_data
,
474 static inline int ocfs2_delete_entry_el(handle_t
*handle
,
476 struct ocfs2_dir_entry
*de_del
,
477 struct buffer_head
*bh
)
479 return __ocfs2_delete_entry(handle
, dir
, de_del
, bh
, bh
->b_data
,
484 * ocfs2_delete_entry deletes a directory entry by merging it with the
487 int ocfs2_delete_entry(handle_t
*handle
,
489 struct ocfs2_dir_entry
*de_del
,
490 struct buffer_head
*bh
)
492 if (OCFS2_I(dir
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
)
493 return ocfs2_delete_entry_id(handle
, dir
, de_del
, bh
);
495 return ocfs2_delete_entry_el(handle
, dir
, de_del
, bh
);
499 * Check whether 'de' has enough room to hold an entry of
500 * 'new_rec_len' bytes.
502 static inline int ocfs2_dirent_would_fit(struct ocfs2_dir_entry
*de
,
503 unsigned int new_rec_len
)
505 unsigned int de_really_used
;
507 /* Check whether this is an empty record with enough space */
508 if (le64_to_cpu(de
->inode
) == 0 &&
509 le16_to_cpu(de
->rec_len
) >= new_rec_len
)
513 * Record might have free space at the end which we can
516 de_really_used
= OCFS2_DIR_REC_LEN(de
->name_len
);
517 if (le16_to_cpu(de
->rec_len
) >= (de_really_used
+ new_rec_len
))
523 /* we don't always have a dentry for what we want to add, so people
524 * like orphan dir can call this instead.
526 * If you pass me insert_bh, I'll skip the search of the other dir
527 * blocks and put the record in there.
529 int __ocfs2_add_entry(handle_t
*handle
,
531 const char *name
, int namelen
,
532 struct inode
*inode
, u64 blkno
,
533 struct buffer_head
*parent_fe_bh
,
534 struct buffer_head
*insert_bh
)
536 unsigned long offset
;
537 unsigned short rec_len
;
538 struct ocfs2_dir_entry
*de
, *de1
;
539 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*)parent_fe_bh
->b_data
;
540 struct super_block
*sb
= dir
->i_sb
;
542 unsigned int size
= sb
->s_blocksize
;
543 char *data_start
= insert_bh
->b_data
;
550 if (OCFS2_I(dir
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
551 data_start
= di
->id2
.i_data
.id_data
;
552 size
= i_size_read(dir
);
554 BUG_ON(insert_bh
!= parent_fe_bh
);
557 rec_len
= OCFS2_DIR_REC_LEN(namelen
);
559 de
= (struct ocfs2_dir_entry
*) data_start
;
561 BUG_ON((char *)de
>= (size
+ data_start
));
563 /* These checks should've already been passed by the
564 * prepare function, but I guess we can leave them
566 if (!ocfs2_check_dir_entry(dir
, de
, insert_bh
, offset
)) {
570 if (ocfs2_match(namelen
, name
, de
)) {
575 if (ocfs2_dirent_would_fit(de
, rec_len
)) {
576 dir
->i_mtime
= dir
->i_ctime
= CURRENT_TIME
;
577 retval
= ocfs2_mark_inode_dirty(handle
, dir
, parent_fe_bh
);
583 status
= ocfs2_journal_access(handle
, dir
, insert_bh
,
584 OCFS2_JOURNAL_ACCESS_WRITE
);
585 /* By now the buffer is marked for journaling */
586 offset
+= le16_to_cpu(de
->rec_len
);
587 if (le64_to_cpu(de
->inode
)) {
588 de1
= (struct ocfs2_dir_entry
*)((char *) de
+
589 OCFS2_DIR_REC_LEN(de
->name_len
));
591 cpu_to_le16(le16_to_cpu(de
->rec_len
) -
592 OCFS2_DIR_REC_LEN(de
->name_len
));
593 de
->rec_len
= cpu_to_le16(OCFS2_DIR_REC_LEN(de
->name_len
));
596 de
->file_type
= OCFS2_FT_UNKNOWN
;
598 de
->inode
= cpu_to_le64(blkno
);
599 ocfs2_set_de_type(de
, inode
->i_mode
);
602 de
->name_len
= namelen
;
603 memcpy(de
->name
, name
, namelen
);
606 status
= ocfs2_journal_dirty(handle
, insert_bh
);
610 offset
+= le16_to_cpu(de
->rec_len
);
611 de
= (struct ocfs2_dir_entry
*) ((char *) de
+ le16_to_cpu(de
->rec_len
));
614 /* when you think about it, the assert above should prevent us
615 * from ever getting here. */
623 static int ocfs2_dir_foreach_blk_id(struct inode
*inode
,
625 loff_t
*f_pos
, void *priv
,
626 filldir_t filldir
, int *filldir_err
)
628 int ret
, i
, filldir_ret
;
629 unsigned long offset
= *f_pos
;
630 struct buffer_head
*di_bh
= NULL
;
631 struct ocfs2_dinode
*di
;
632 struct ocfs2_inline_data
*data
;
633 struct ocfs2_dir_entry
*de
;
635 ret
= ocfs2_read_inode_block(inode
, &di_bh
);
637 mlog(ML_ERROR
, "Unable to read inode block for dir %llu\n",
638 (unsigned long long)OCFS2_I(inode
)->ip_blkno
);
642 di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
643 data
= &di
->id2
.i_data
;
645 while (*f_pos
< i_size_read(inode
)) {
647 /* If the dir block has changed since the last call to
648 * readdir(2), then we might be pointing to an invalid
649 * dirent right now. Scan from the start of the block
651 if (*f_version
!= inode
->i_version
) {
652 for (i
= 0; i
< i_size_read(inode
) && i
< offset
; ) {
653 de
= (struct ocfs2_dir_entry
*)
655 /* It's too expensive to do a full
656 * dirent test each time round this
657 * loop, but we do have to test at
658 * least that it is non-zero. A
659 * failure will be detected in the
660 * dirent test below. */
661 if (le16_to_cpu(de
->rec_len
) <
662 OCFS2_DIR_REC_LEN(1))
664 i
+= le16_to_cpu(de
->rec_len
);
667 *f_version
= inode
->i_version
;
670 de
= (struct ocfs2_dir_entry
*) (data
->id_data
+ *f_pos
);
671 if (!ocfs2_check_dir_entry(inode
, de
, di_bh
, *f_pos
)) {
672 /* On error, skip the f_pos to the end. */
673 *f_pos
= i_size_read(inode
);
676 offset
+= le16_to_cpu(de
->rec_len
);
677 if (le64_to_cpu(de
->inode
)) {
678 /* We might block in the next section
679 * if the data destination is
680 * currently swapped out. So, use a
681 * version stamp to detect whether or
682 * not the directory has been modified
683 * during the copy operation.
685 u64 version
= *f_version
;
686 unsigned char d_type
= DT_UNKNOWN
;
688 if (de
->file_type
< OCFS2_FT_MAX
)
689 d_type
= ocfs2_filetype_table
[de
->file_type
];
691 filldir_ret
= filldir(priv
, de
->name
,
694 le64_to_cpu(de
->inode
),
698 *filldir_err
= filldir_ret
;
701 if (version
!= *f_version
)
704 *f_pos
+= le16_to_cpu(de
->rec_len
);
713 static int ocfs2_dir_foreach_blk_el(struct inode
*inode
,
715 loff_t
*f_pos
, void *priv
,
716 filldir_t filldir
, int *filldir_err
)
719 unsigned long offset
, blk
, last_ra_blk
= 0;
721 struct buffer_head
* bh
, * tmp
;
722 struct ocfs2_dir_entry
* de
;
723 struct super_block
* sb
= inode
->i_sb
;
724 unsigned int ra_sectors
= 16;
729 offset
= (*f_pos
) & (sb
->s_blocksize
- 1);
731 while (!error
&& !stored
&& *f_pos
< i_size_read(inode
)) {
732 blk
= (*f_pos
) >> sb
->s_blocksize_bits
;
733 if (ocfs2_read_dir_block(inode
, blk
, &bh
, 0)) {
734 /* Skip the corrupt dirblock and keep trying */
735 *f_pos
+= sb
->s_blocksize
- offset
;
739 /* The idea here is to begin with 8k read-ahead and to stay
740 * 4k ahead of our current position.
742 * TODO: Use the pagecache for this. We just need to
743 * make sure it's cluster-safe... */
745 || (((last_ra_blk
- blk
) << 9) <= (ra_sectors
/ 2))) {
746 for (i
= ra_sectors
>> (sb
->s_blocksize_bits
- 9);
749 if (!ocfs2_read_dir_block(inode
, ++blk
, &tmp
,
758 /* If the dir block has changed since the last call to
759 * readdir(2), then we might be pointing to an invalid
760 * dirent right now. Scan from the start of the block
762 if (*f_version
!= inode
->i_version
) {
763 for (i
= 0; i
< sb
->s_blocksize
&& i
< offset
; ) {
764 de
= (struct ocfs2_dir_entry
*) (bh
->b_data
+ i
);
765 /* It's too expensive to do a full
766 * dirent test each time round this
767 * loop, but we do have to test at
768 * least that it is non-zero. A
769 * failure will be detected in the
770 * dirent test below. */
771 if (le16_to_cpu(de
->rec_len
) <
772 OCFS2_DIR_REC_LEN(1))
774 i
+= le16_to_cpu(de
->rec_len
);
777 *f_pos
= ((*f_pos
) & ~(sb
->s_blocksize
- 1))
779 *f_version
= inode
->i_version
;
782 while (!error
&& *f_pos
< i_size_read(inode
)
783 && offset
< sb
->s_blocksize
) {
784 de
= (struct ocfs2_dir_entry
*) (bh
->b_data
+ offset
);
785 if (!ocfs2_check_dir_entry(inode
, de
, bh
, offset
)) {
786 /* On error, skip the f_pos to the
788 *f_pos
= ((*f_pos
) | (sb
->s_blocksize
- 1)) + 1;
792 offset
+= le16_to_cpu(de
->rec_len
);
793 if (le64_to_cpu(de
->inode
)) {
794 /* We might block in the next section
795 * if the data destination is
796 * currently swapped out. So, use a
797 * version stamp to detect whether or
798 * not the directory has been modified
799 * during the copy operation.
801 unsigned long version
= *f_version
;
802 unsigned char d_type
= DT_UNKNOWN
;
804 if (de
->file_type
< OCFS2_FT_MAX
)
805 d_type
= ocfs2_filetype_table
[de
->file_type
];
806 error
= filldir(priv
, de
->name
,
809 le64_to_cpu(de
->inode
),
813 *filldir_err
= error
;
816 if (version
!= *f_version
)
820 *f_pos
+= le16_to_cpu(de
->rec_len
);
832 static int ocfs2_dir_foreach_blk(struct inode
*inode
, u64
*f_version
,
833 loff_t
*f_pos
, void *priv
, filldir_t filldir
,
836 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
)
837 return ocfs2_dir_foreach_blk_id(inode
, f_version
, f_pos
, priv
,
838 filldir
, filldir_err
);
840 return ocfs2_dir_foreach_blk_el(inode
, f_version
, f_pos
, priv
, filldir
,
845 * This is intended to be called from inside other kernel functions,
846 * so we fake some arguments.
848 int ocfs2_dir_foreach(struct inode
*inode
, loff_t
*f_pos
, void *priv
,
851 int ret
= 0, filldir_err
= 0;
852 u64 version
= inode
->i_version
;
854 while (*f_pos
< i_size_read(inode
)) {
855 ret
= ocfs2_dir_foreach_blk(inode
, &version
, f_pos
, priv
,
856 filldir
, &filldir_err
);
857 if (ret
|| filldir_err
)
871 int ocfs2_readdir(struct file
* filp
, void * dirent
, filldir_t filldir
)
874 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
877 mlog_entry("dirino=%llu\n",
878 (unsigned long long)OCFS2_I(inode
)->ip_blkno
);
880 error
= ocfs2_inode_lock_atime(inode
, filp
->f_vfsmnt
, &lock_level
);
881 if (lock_level
&& error
>= 0) {
882 /* We release EX lock which used to update atime
883 * and get PR lock again to reduce contention
884 * on commonly accessed directories. */
885 ocfs2_inode_unlock(inode
, 1);
887 error
= ocfs2_inode_lock(inode
, NULL
, 0);
890 if (error
!= -ENOENT
)
892 /* we haven't got any yet, so propagate the error. */
896 error
= ocfs2_dir_foreach_blk(inode
, &filp
->f_version
, &filp
->f_pos
,
897 dirent
, filldir
, NULL
);
899 ocfs2_inode_unlock(inode
, lock_level
);
908 * NOTE: this should always be called with parent dir i_mutex taken.
910 int ocfs2_find_files_on_disk(const char *name
,
914 struct buffer_head
**dirent_bh
,
915 struct ocfs2_dir_entry
**dirent
)
917 int status
= -ENOENT
;
919 mlog_entry("(name=%.*s, blkno=%p, inode=%p, dirent_bh=%p, dirent=%p)\n",
920 namelen
, name
, blkno
, inode
, dirent_bh
, dirent
);
922 *dirent_bh
= ocfs2_find_entry(name
, namelen
, inode
, dirent
);
923 if (!*dirent_bh
|| !*dirent
) {
928 *blkno
= le64_to_cpu((*dirent
)->inode
);
943 * Convenience function for callers which just want the block number
944 * mapped to a name and don't require the full dirent info, etc.
946 int ocfs2_lookup_ino_from_name(struct inode
*dir
, const char *name
,
947 int namelen
, u64
*blkno
)
950 struct buffer_head
*bh
= NULL
;
951 struct ocfs2_dir_entry
*dirent
= NULL
;
953 ret
= ocfs2_find_files_on_disk(name
, namelen
, blkno
, dir
, &bh
, &dirent
);
959 /* Check for a name within a directory.
961 * Return 0 if the name does not exist
962 * Return -EEXIST if the directory contains the name
964 * Callers should have i_mutex + a cluster lock on dir
966 int ocfs2_check_dir_for_entry(struct inode
*dir
,
971 struct buffer_head
*dirent_bh
= NULL
;
972 struct ocfs2_dir_entry
*dirent
= NULL
;
974 mlog_entry("dir %llu, name '%.*s'\n",
975 (unsigned long long)OCFS2_I(dir
)->ip_blkno
, namelen
, name
);
978 dirent_bh
= ocfs2_find_entry(name
, namelen
, dir
, &dirent
);
990 struct ocfs2_empty_dir_priv
{
992 unsigned seen_dot_dot
;
995 static int ocfs2_empty_dir_filldir(void *priv
, const char *name
, int name_len
,
996 loff_t pos
, u64 ino
, unsigned type
)
998 struct ocfs2_empty_dir_priv
*p
= priv
;
1001 * Check the positions of "." and ".." records to be sure
1002 * they're in the correct place.
1004 if (name_len
== 1 && !strncmp(".", name
, 1) && pos
== 0) {
1009 if (name_len
== 2 && !strncmp("..", name
, 2) &&
1010 pos
== OCFS2_DIR_REC_LEN(1)) {
1011 p
->seen_dot_dot
= 1;
1019 * routine to check that the specified directory is empty (for rmdir)
1021 * Returns 1 if dir is empty, zero otherwise.
1023 int ocfs2_empty_dir(struct inode
*inode
)
1027 struct ocfs2_empty_dir_priv priv
;
1029 memset(&priv
, 0, sizeof(priv
));
1031 ret
= ocfs2_dir_foreach(inode
, &start
, &priv
, ocfs2_empty_dir_filldir
);
1035 if (!priv
.seen_dot
|| !priv
.seen_dot_dot
) {
1036 mlog(ML_ERROR
, "bad directory (dir #%llu) - no `.' or `..'\n",
1037 (unsigned long long)OCFS2_I(inode
)->ip_blkno
);
1039 * XXX: Is it really safe to allow an unlink to continue?
1044 return !priv
.seen_other
;
1047 static void ocfs2_fill_initial_dirents(struct inode
*inode
,
1048 struct inode
*parent
,
1049 char *start
, unsigned int size
)
1051 struct ocfs2_dir_entry
*de
= (struct ocfs2_dir_entry
*)start
;
1053 de
->inode
= cpu_to_le64(OCFS2_I(inode
)->ip_blkno
);
1056 cpu_to_le16(OCFS2_DIR_REC_LEN(de
->name_len
));
1057 strcpy(de
->name
, ".");
1058 ocfs2_set_de_type(de
, S_IFDIR
);
1060 de
= (struct ocfs2_dir_entry
*) ((char *)de
+ le16_to_cpu(de
->rec_len
));
1061 de
->inode
= cpu_to_le64(OCFS2_I(parent
)->ip_blkno
);
1062 de
->rec_len
= cpu_to_le16(size
- OCFS2_DIR_REC_LEN(1));
1064 strcpy(de
->name
, "..");
1065 ocfs2_set_de_type(de
, S_IFDIR
);
1069 * This works together with code in ocfs2_mknod_locked() which sets
1070 * the inline-data flag and initializes the inline-data section.
1072 static int ocfs2_fill_new_dir_id(struct ocfs2_super
*osb
,
1074 struct inode
*parent
,
1075 struct inode
*inode
,
1076 struct buffer_head
*di_bh
)
1079 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
1080 struct ocfs2_inline_data
*data
= &di
->id2
.i_data
;
1081 unsigned int size
= le16_to_cpu(data
->id_count
);
1083 ret
= ocfs2_journal_access(handle
, inode
, di_bh
,
1084 OCFS2_JOURNAL_ACCESS_WRITE
);
1090 ocfs2_fill_initial_dirents(inode
, parent
, data
->id_data
, size
);
1092 ocfs2_journal_dirty(handle
, di_bh
);
1098 i_size_write(inode
, size
);
1100 inode
->i_blocks
= ocfs2_inode_sector_count(inode
);
1102 ret
= ocfs2_mark_inode_dirty(handle
, inode
, di_bh
);
1110 static int ocfs2_fill_new_dir_el(struct ocfs2_super
*osb
,
1112 struct inode
*parent
,
1113 struct inode
*inode
,
1114 struct buffer_head
*fe_bh
,
1115 struct ocfs2_alloc_context
*data_ac
)
1118 struct buffer_head
*new_bh
= NULL
;
1122 status
= ocfs2_do_extend_dir(osb
->sb
, handle
, inode
, fe_bh
,
1123 data_ac
, NULL
, &new_bh
);
1129 ocfs2_set_new_buffer_uptodate(inode
, new_bh
);
1131 status
= ocfs2_journal_access(handle
, inode
, new_bh
,
1132 OCFS2_JOURNAL_ACCESS_CREATE
);
1137 memset(new_bh
->b_data
, 0, osb
->sb
->s_blocksize
);
1139 ocfs2_fill_initial_dirents(inode
, parent
, new_bh
->b_data
,
1140 osb
->sb
->s_blocksize
);
1142 status
= ocfs2_journal_dirty(handle
, new_bh
);
1148 i_size_write(inode
, inode
->i_sb
->s_blocksize
);
1150 inode
->i_blocks
= ocfs2_inode_sector_count(inode
);
1151 status
= ocfs2_mark_inode_dirty(handle
, inode
, fe_bh
);
1165 int ocfs2_fill_new_dir(struct ocfs2_super
*osb
,
1167 struct inode
*parent
,
1168 struct inode
*inode
,
1169 struct buffer_head
*fe_bh
,
1170 struct ocfs2_alloc_context
*data_ac
)
1172 BUG_ON(!ocfs2_supports_inline_data(osb
) && data_ac
== NULL
);
1174 if (OCFS2_I(inode
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
)
1175 return ocfs2_fill_new_dir_id(osb
, handle
, parent
, inode
, fe_bh
);
1177 return ocfs2_fill_new_dir_el(osb
, handle
, parent
, inode
, fe_bh
,
1181 static void ocfs2_expand_last_dirent(char *start
, unsigned int old_size
,
1182 unsigned int new_size
)
1184 struct ocfs2_dir_entry
*de
;
1185 struct ocfs2_dir_entry
*prev_de
;
1186 char *de_buf
, *limit
;
1187 unsigned int bytes
= new_size
- old_size
;
1189 limit
= start
+ old_size
;
1191 de
= (struct ocfs2_dir_entry
*)de_buf
;
1194 de_buf
+= le16_to_cpu(de
->rec_len
);
1195 de
= (struct ocfs2_dir_entry
*)de_buf
;
1196 } while (de_buf
< limit
);
1198 le16_add_cpu(&prev_de
->rec_len
, bytes
);
1202 * We allocate enough clusters to fulfill "blocks_wanted", but set
1203 * i_size to exactly one block. Ocfs2_extend_dir() will handle the
1204 * rest automatically for us.
1206 * *first_block_bh is a pointer to the 1st data block allocated to the
1209 static int ocfs2_expand_inline_dir(struct inode
*dir
, struct buffer_head
*di_bh
,
1210 unsigned int blocks_wanted
,
1211 struct buffer_head
**first_block_bh
)
1213 int ret
, credits
= OCFS2_INLINE_TO_EXTENTS_CREDITS
;
1214 u32 alloc
, bit_off
, len
;
1215 struct super_block
*sb
= dir
->i_sb
;
1216 u64 blkno
, bytes
= blocks_wanted
<< sb
->s_blocksize_bits
;
1217 struct ocfs2_super
*osb
= OCFS2_SB(dir
->i_sb
);
1218 struct ocfs2_inode_info
*oi
= OCFS2_I(dir
);
1219 struct ocfs2_alloc_context
*data_ac
;
1220 struct buffer_head
*dirdata_bh
= NULL
;
1221 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
1223 struct ocfs2_extent_tree et
;
1225 ocfs2_init_dinode_extent_tree(&et
, dir
, di_bh
);
1227 alloc
= ocfs2_clusters_for_bytes(sb
, bytes
);
1230 * We should never need more than 2 clusters for this -
1231 * maximum dirent size is far less than one block. In fact,
1232 * the only time we'd need more than one cluster is if
1233 * blocksize == clustersize and the dirent won't fit in the
1234 * extra space that the expansion to a single block gives. As
1235 * of today, that only happens on 4k/4k file systems.
1239 ret
= ocfs2_reserve_clusters(osb
, alloc
, &data_ac
);
1245 down_write(&oi
->ip_alloc_sem
);
1248 * Prepare for worst case allocation scenario of two separate
1252 credits
+= OCFS2_SUBALLOC_ALLOC
;
1254 handle
= ocfs2_start_trans(osb
, credits
);
1255 if (IS_ERR(handle
)) {
1256 ret
= PTR_ERR(handle
);
1262 * Try to claim as many clusters as the bitmap can give though
1263 * if we only get one now, that's enough to continue. The rest
1264 * will be claimed after the conversion to extents.
1266 ret
= ocfs2_claim_clusters(osb
, handle
, data_ac
, 1, &bit_off
, &len
);
1273 * Operations are carefully ordered so that we set up the new
1274 * data block first. The conversion from inline data to
1277 blkno
= ocfs2_clusters_to_blocks(dir
->i_sb
, bit_off
);
1278 dirdata_bh
= sb_getblk(sb
, blkno
);
1285 ocfs2_set_new_buffer_uptodate(dir
, dirdata_bh
);
1287 ret
= ocfs2_journal_access(handle
, dir
, dirdata_bh
,
1288 OCFS2_JOURNAL_ACCESS_CREATE
);
1294 memcpy(dirdata_bh
->b_data
, di
->id2
.i_data
.id_data
, i_size_read(dir
));
1295 memset(dirdata_bh
->b_data
+ i_size_read(dir
), 0,
1296 sb
->s_blocksize
- i_size_read(dir
));
1297 ocfs2_expand_last_dirent(dirdata_bh
->b_data
, i_size_read(dir
),
1300 ret
= ocfs2_journal_dirty(handle
, dirdata_bh
);
1307 * Set extent, i_size, etc on the directory. After this, the
1308 * inode should contain the same exact dirents as before and
1309 * be fully accessible from system calls.
1311 * We let the later dirent insert modify c/mtime - to the user
1312 * the data hasn't changed.
1314 ret
= ocfs2_journal_access(handle
, dir
, di_bh
,
1315 OCFS2_JOURNAL_ACCESS_CREATE
);
1321 spin_lock(&oi
->ip_lock
);
1322 oi
->ip_dyn_features
&= ~OCFS2_INLINE_DATA_FL
;
1323 di
->i_dyn_features
= cpu_to_le16(oi
->ip_dyn_features
);
1324 spin_unlock(&oi
->ip_lock
);
1326 ocfs2_dinode_new_extent_list(dir
, di
);
1328 i_size_write(dir
, sb
->s_blocksize
);
1329 dir
->i_mtime
= dir
->i_ctime
= CURRENT_TIME
;
1331 di
->i_size
= cpu_to_le64(sb
->s_blocksize
);
1332 di
->i_ctime
= di
->i_mtime
= cpu_to_le64(dir
->i_ctime
.tv_sec
);
1333 di
->i_ctime_nsec
= di
->i_mtime_nsec
= cpu_to_le32(dir
->i_ctime
.tv_nsec
);
1336 * This should never fail as our extent list is empty and all
1337 * related blocks have been journaled already.
1339 ret
= ocfs2_insert_extent(osb
, handle
, dir
, &et
, 0, blkno
, len
,
1347 * Set i_blocks after the extent insert for the most up to
1348 * date ip_clusters value.
1350 dir
->i_blocks
= ocfs2_inode_sector_count(dir
);
1352 ret
= ocfs2_journal_dirty(handle
, di_bh
);
1359 * We asked for two clusters, but only got one in the 1st
1360 * pass. Claim the 2nd cluster as a separate extent.
1363 ret
= ocfs2_claim_clusters(osb
, handle
, data_ac
, 1, &bit_off
,
1369 blkno
= ocfs2_clusters_to_blocks(dir
->i_sb
, bit_off
);
1371 ret
= ocfs2_insert_extent(osb
, handle
, dir
, &et
, 1,
1372 blkno
, len
, 0, NULL
);
1379 *first_block_bh
= dirdata_bh
;
1383 ocfs2_commit_trans(osb
, handle
);
1386 up_write(&oi
->ip_alloc_sem
);
1390 ocfs2_free_alloc_context(data_ac
);
1397 /* returns a bh of the 1st new block in the allocation. */
1398 static int ocfs2_do_extend_dir(struct super_block
*sb
,
1401 struct buffer_head
*parent_fe_bh
,
1402 struct ocfs2_alloc_context
*data_ac
,
1403 struct ocfs2_alloc_context
*meta_ac
,
1404 struct buffer_head
**new_bh
)
1408 u64 p_blkno
, v_blkno
;
1410 spin_lock(&OCFS2_I(dir
)->ip_lock
);
1411 extend
= (i_size_read(dir
) == ocfs2_clusters_to_bytes(sb
, OCFS2_I(dir
)->ip_clusters
));
1412 spin_unlock(&OCFS2_I(dir
)->ip_lock
);
1415 u32 offset
= OCFS2_I(dir
)->ip_clusters
;
1417 status
= ocfs2_add_inode_data(OCFS2_SB(sb
), dir
, &offset
,
1418 1, 0, parent_fe_bh
, handle
,
1419 data_ac
, meta_ac
, NULL
);
1420 BUG_ON(status
== -EAGAIN
);
1427 v_blkno
= ocfs2_blocks_for_bytes(sb
, i_size_read(dir
));
1428 status
= ocfs2_extent_map_get_blocks(dir
, v_blkno
, &p_blkno
, NULL
, NULL
);
1434 *new_bh
= sb_getblk(sb
, p_blkno
);
1447 * Assumes you already have a cluster lock on the directory.
1449 * 'blocks_wanted' is only used if we have an inline directory which
1450 * is to be turned into an extent based one. The size of the dirent to
1451 * insert might be larger than the space gained by growing to just one
1452 * block, so we may have to grow the inode by two blocks in that case.
1454 static int ocfs2_extend_dir(struct ocfs2_super
*osb
,
1456 struct buffer_head
*parent_fe_bh
,
1457 unsigned int blocks_wanted
,
1458 struct buffer_head
**new_de_bh
)
1461 int credits
, num_free_extents
, drop_alloc_sem
= 0;
1463 struct ocfs2_dinode
*fe
= (struct ocfs2_dinode
*) parent_fe_bh
->b_data
;
1464 struct ocfs2_extent_list
*el
= &fe
->id2
.i_list
;
1465 struct ocfs2_alloc_context
*data_ac
= NULL
;
1466 struct ocfs2_alloc_context
*meta_ac
= NULL
;
1467 handle_t
*handle
= NULL
;
1468 struct buffer_head
*new_bh
= NULL
;
1469 struct ocfs2_dir_entry
* de
;
1470 struct super_block
*sb
= osb
->sb
;
1471 struct ocfs2_extent_tree et
;
1475 if (OCFS2_I(dir
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1476 status
= ocfs2_expand_inline_dir(dir
, parent_fe_bh
,
1477 blocks_wanted
, &new_bh
);
1483 if (blocks_wanted
== 1) {
1485 * If the new dirent will fit inside the space
1486 * created by pushing out to one block, then
1487 * we can complete the operation
1488 * here. Otherwise we have to expand i_size
1489 * and format the 2nd block below.
1491 BUG_ON(new_bh
== NULL
);
1496 * Get rid of 'new_bh' - we want to format the 2nd
1497 * data block and return that instead.
1502 dir_i_size
= i_size_read(dir
);
1503 credits
= OCFS2_SIMPLE_DIR_EXTEND_CREDITS
;
1507 dir_i_size
= i_size_read(dir
);
1508 mlog(0, "extending dir %llu (i_size = %lld)\n",
1509 (unsigned long long)OCFS2_I(dir
)->ip_blkno
, dir_i_size
);
1511 /* dir->i_size is always block aligned. */
1512 spin_lock(&OCFS2_I(dir
)->ip_lock
);
1513 if (dir_i_size
== ocfs2_clusters_to_bytes(sb
, OCFS2_I(dir
)->ip_clusters
)) {
1514 spin_unlock(&OCFS2_I(dir
)->ip_lock
);
1515 ocfs2_init_dinode_extent_tree(&et
, dir
, parent_fe_bh
);
1516 num_free_extents
= ocfs2_num_free_extents(osb
, dir
, &et
);
1517 if (num_free_extents
< 0) {
1518 status
= num_free_extents
;
1523 if (!num_free_extents
) {
1524 status
= ocfs2_reserve_new_metadata(osb
, el
, &meta_ac
);
1526 if (status
!= -ENOSPC
)
1532 status
= ocfs2_reserve_clusters(osb
, 1, &data_ac
);
1534 if (status
!= -ENOSPC
)
1539 credits
= ocfs2_calc_extend_credits(sb
, el
, 1);
1541 spin_unlock(&OCFS2_I(dir
)->ip_lock
);
1542 credits
= OCFS2_SIMPLE_DIR_EXTEND_CREDITS
;
1546 down_write(&OCFS2_I(dir
)->ip_alloc_sem
);
1549 handle
= ocfs2_start_trans(osb
, credits
);
1550 if (IS_ERR(handle
)) {
1551 status
= PTR_ERR(handle
);
1557 status
= ocfs2_do_extend_dir(osb
->sb
, handle
, dir
, parent_fe_bh
,
1558 data_ac
, meta_ac
, &new_bh
);
1564 ocfs2_set_new_buffer_uptodate(dir
, new_bh
);
1566 status
= ocfs2_journal_access(handle
, dir
, new_bh
,
1567 OCFS2_JOURNAL_ACCESS_CREATE
);
1572 memset(new_bh
->b_data
, 0, sb
->s_blocksize
);
1573 de
= (struct ocfs2_dir_entry
*) new_bh
->b_data
;
1575 de
->rec_len
= cpu_to_le16(sb
->s_blocksize
);
1576 status
= ocfs2_journal_dirty(handle
, new_bh
);
1582 dir_i_size
+= dir
->i_sb
->s_blocksize
;
1583 i_size_write(dir
, dir_i_size
);
1584 dir
->i_blocks
= ocfs2_inode_sector_count(dir
);
1585 status
= ocfs2_mark_inode_dirty(handle
, dir
, parent_fe_bh
);
1592 *new_de_bh
= new_bh
;
1596 up_write(&OCFS2_I(dir
)->ip_alloc_sem
);
1598 ocfs2_commit_trans(osb
, handle
);
1601 ocfs2_free_alloc_context(data_ac
);
1603 ocfs2_free_alloc_context(meta_ac
);
1611 static int ocfs2_find_dir_space_id(struct inode
*dir
, struct buffer_head
*di_bh
,
1612 const char *name
, int namelen
,
1613 struct buffer_head
**ret_de_bh
,
1614 unsigned int *blocks_wanted
)
1617 struct ocfs2_dinode
*di
= (struct ocfs2_dinode
*)di_bh
->b_data
;
1618 struct ocfs2_dir_entry
*de
, *last_de
= NULL
;
1619 char *de_buf
, *limit
;
1620 unsigned long offset
= 0;
1621 unsigned int rec_len
, new_rec_len
;
1623 de_buf
= di
->id2
.i_data
.id_data
;
1624 limit
= de_buf
+ i_size_read(dir
);
1625 rec_len
= OCFS2_DIR_REC_LEN(namelen
);
1627 while (de_buf
< limit
) {
1628 de
= (struct ocfs2_dir_entry
*)de_buf
;
1630 if (!ocfs2_check_dir_entry(dir
, de
, di_bh
, offset
)) {
1634 if (ocfs2_match(namelen
, name
, de
)) {
1638 if (ocfs2_dirent_would_fit(de
, rec_len
)) {
1639 /* Ok, we found a spot. Return this bh and let
1640 * the caller actually fill it in. */
1648 de_buf
+= le16_to_cpu(de
->rec_len
);
1649 offset
+= le16_to_cpu(de
->rec_len
);
1653 * We're going to require expansion of the directory - figure
1654 * out how many blocks we'll need so that a place for the
1655 * dirent can be found.
1658 new_rec_len
= le16_to_cpu(last_de
->rec_len
) + (dir
->i_sb
->s_blocksize
- i_size_read(dir
));
1659 if (new_rec_len
< (rec_len
+ OCFS2_DIR_REC_LEN(last_de
->name_len
)))
1667 static int ocfs2_find_dir_space_el(struct inode
*dir
, const char *name
,
1668 int namelen
, struct buffer_head
**ret_de_bh
)
1670 unsigned long offset
;
1671 struct buffer_head
*bh
= NULL
;
1672 unsigned short rec_len
;
1673 struct ocfs2_dir_entry
*de
;
1674 struct super_block
*sb
= dir
->i_sb
;
1677 status
= ocfs2_read_dir_block(dir
, 0, &bh
, 0);
1683 rec_len
= OCFS2_DIR_REC_LEN(namelen
);
1685 de
= (struct ocfs2_dir_entry
*) bh
->b_data
;
1687 if ((char *)de
>= sb
->s_blocksize
+ bh
->b_data
) {
1691 if (i_size_read(dir
) <= offset
) {
1693 * Caller will have to expand this
1699 status
= ocfs2_read_dir_block(dir
,
1700 offset
>> sb
->s_blocksize_bits
,
1706 /* move to next block */
1707 de
= (struct ocfs2_dir_entry
*) bh
->b_data
;
1709 if (!ocfs2_check_dir_entry(dir
, de
, bh
, offset
)) {
1713 if (ocfs2_match(namelen
, name
, de
)) {
1717 if (ocfs2_dirent_would_fit(de
, rec_len
)) {
1718 /* Ok, we found a spot. Return this bh and let
1719 * the caller actually fill it in. */
1725 offset
+= le16_to_cpu(de
->rec_len
);
1726 de
= (struct ocfs2_dir_entry
*)((char *) de
+ le16_to_cpu(de
->rec_len
));
1737 int ocfs2_prepare_dir_for_insert(struct ocfs2_super
*osb
,
1739 struct buffer_head
*parent_fe_bh
,
1742 struct buffer_head
**ret_de_bh
)
1745 unsigned int blocks_wanted
= 1;
1746 struct buffer_head
*bh
= NULL
;
1748 mlog(0, "getting ready to insert namelen %d into dir %llu\n",
1749 namelen
, (unsigned long long)OCFS2_I(dir
)->ip_blkno
);
1759 if (OCFS2_I(dir
)->ip_dyn_features
& OCFS2_INLINE_DATA_FL
) {
1760 ret
= ocfs2_find_dir_space_id(dir
, parent_fe_bh
, name
,
1761 namelen
, &bh
, &blocks_wanted
);
1763 ret
= ocfs2_find_dir_space_el(dir
, name
, namelen
, &bh
);
1765 if (ret
&& ret
!= -ENOSPC
) {
1770 if (ret
== -ENOSPC
) {
1772 * We have to expand the directory to add this name.
1776 ret
= ocfs2_extend_dir(osb
, dir
, parent_fe_bh
, blocks_wanted
,