1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_bmap.h"
#include "xfs_dir2.h"
#include "xfs_dir2_priv.h"
#include "xfs_errortag.h"
#include "xfs_error.h"
#include "xfs_trace.h"
const struct xfs_name xfs_name_dotdot = {
.name = (const unsigned char *)"..",
.len = 2,
.type = XFS_DIR3_FT_DIR,
};
/*
* Convert inode mode to directory entry filetype
*/
unsigned char
xfs_mode_to_ftype(
int mode)
{
switch (mode & S_IFMT) {
case S_IFREG:
return XFS_DIR3_FT_REG_FILE;
case S_IFDIR:
return XFS_DIR3_FT_DIR;
case S_IFCHR:
return XFS_DIR3_FT_CHRDEV;
case S_IFBLK:
return XFS_DIR3_FT_BLKDEV;
case S_IFIFO:
return XFS_DIR3_FT_FIFO;
case S_IFSOCK:
return XFS_DIR3_FT_SOCK;
case S_IFLNK:
return XFS_DIR3_FT_SYMLINK;
default:
return XFS_DIR3_FT_UNKNOWN;
}
}
/*
* ASCII case-insensitive (ie. A-Z) support for directories that was
* used in IRIX.
*/
xfs_dahash_t
xfs_ascii_ci_hashname(
const struct xfs_name *name)
{
xfs_dahash_t hash;
int i;
for (i = 0, hash = 0; i < name->len; i++)
hash = tolower(name->name[i]) ^ rol32(hash, 7);
return hash;
}
enum xfs_dacmp
xfs_ascii_ci_compname(
struct xfs_da_args *args,
const unsigned char *name,
int len)
{
enum xfs_dacmp result;
int i;
if (args->namelen != len)
return XFS_CMP_DIFFERENT;
result = XFS_CMP_EXACT;
for (i = 0; i < len; i++) {
if (args->name[i] == name[i])
continue;
if (tolower(args->name[i]) != tolower(name[i]))
return XFS_CMP_DIFFERENT;
result = XFS_CMP_CASE;
}
return result;
}
int
xfs_da_mount(
struct xfs_mount *mp)
{
struct xfs_da_geometry *dageo;
ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
ASSERT(xfs_dir2_dirblock_bytes(&mp->m_sb) <= XFS_MAX_BLOCKSIZE);
mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry),
KM_MAYFAIL);
mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry),
KM_MAYFAIL);
if (!mp->m_dir_geo || !mp->m_attr_geo) {
kmem_free(mp->m_dir_geo);
kmem_free(mp->m_attr_geo);
return -ENOMEM;
}
/* set up directory geometry */
dageo = mp->m_dir_geo;
dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog;
dageo->fsblog = mp->m_sb.sb_blocklog;
dageo->blksize = xfs_dir2_dirblock_bytes(&mp->m_sb);
dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog;
if (xfs_has_crc(mp)) {
dageo->node_hdr_size = sizeof(struct xfs_da3_node_hdr);
dageo->leaf_hdr_size = sizeof(struct xfs_dir3_leaf_hdr);
dageo->free_hdr_size = sizeof(struct xfs_dir3_free_hdr);
dageo->data_entry_offset =
sizeof(struct xfs_dir3_data_hdr);
} else {
dageo->node_hdr_size = sizeof(struct xfs_da_node_hdr);
dageo->leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr);
dageo->free_hdr_size = sizeof(struct xfs_dir2_free_hdr);
dageo->data_entry_offset =
sizeof(struct xfs_dir2_data_hdr);
}
dageo->leaf_max_ents = (dageo->blksize - dageo->leaf_hdr_size) /
sizeof(struct xfs_dir2_leaf_entry);
dageo->free_max_bests = (dageo->blksize - dageo->free_hdr_size) /
sizeof(xfs_dir2_data_off_t);
dageo->data_first_offset = dageo->data_entry_offset +
xfs_dir2_data_entsize(mp, 1) +
xfs_dir2_data_entsize(mp, 2);
/*
* Now we've set up the block conversion variables, we can calculate the
* segment block constants using the geometry structure.
*/
dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET);
dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET);
dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET);
dageo->node_ents = (dageo->blksize - dageo->node_hdr_size) /
(uint)sizeof(xfs_da_node_entry_t);
dageo->max_extents = (XFS_DIR2_MAX_SPACES * XFS_DIR2_SPACE_SIZE) >>
mp->m_sb.sb_blocklog;
dageo->magicpct = (dageo->blksize * 37) / 100;
/* set up attribute geometry - single fsb only */
dageo = mp->m_attr_geo;
dageo->blklog = mp->m_sb.sb_blocklog;
dageo->fsblog = mp->m_sb.sb_blocklog;
dageo->blksize = 1 << dageo->blklog;
dageo->fsbcount = 1;
dageo->node_hdr_size = mp->m_dir_geo->node_hdr_size;
dageo->node_ents = (dageo->blksize - dageo->node_hdr_size) /
(uint)sizeof(xfs_da_node_entry_t);
if (xfs_has_large_extent_counts(mp))
dageo->max_extents = XFS_MAX_EXTCNT_ATTR_FORK_LARGE;
else
dageo->max_extents = XFS_MAX_EXTCNT_ATTR_FORK_SMALL;
dageo->magicpct = (dageo->blksize * 37) / 100;
return 0;
}
void
xfs_da_unmount(
struct xfs_mount *mp)
{
kmem_free(mp->m_dir_geo);
kmem_free(mp->m_attr_geo);
}
/*
* Return 1 if directory contains only "." and "..".
*/
int
xfs_dir_isempty(
xfs_inode_t *dp)
{
xfs_dir2_sf_hdr_t *sfp;
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
if (dp->i_disk_size == 0) /* might happen during shutdown. */
return 1;
if (dp->i_disk_size > XFS_IFORK_DSIZE(dp))
return 0;
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
return !sfp->count;
}
/*
* Validate a given inode number.
*/
int
xfs_dir_ino_validate(
xfs_mount_t *mp,
xfs_ino_t ino)
{
bool ino_ok = xfs_verify_dir_ino(mp, ino);
if (XFS_IS_CORRUPT(mp, !ino_ok) ||
XFS_TEST_ERROR(false, mp, XFS_ERRTAG_DIR_INO_VALIDATE)) {
xfs_warn(mp, "Invalid inode number 0x%Lx",
(unsigned long long) ino);
return -EFSCORRUPTED;
}
return 0;
}
/*
* Initialize a directory with its "." and ".." entries.
*/
int
xfs_dir_init(
xfs_trans_t *tp,
xfs_inode_t *dp,
xfs_inode_t *pdp)
{
struct xfs_da_args *args;
int error;
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino);
if (error)
return error;
args = kmem_zalloc(sizeof(*args), KM_NOFS);
if (!args)
return -ENOMEM;
args->geo = dp->i_mount->m_dir_geo;
args->dp = dp;
args->trans = tp;
error = xfs_dir2_sf_create(args, pdp->i_ino);
kmem_free(args);
return error;
}
/*
* Enter a name in a directory, or check for available space.
* If inum is 0, only the available space test is performed.
*/
int
xfs_dir_createname(
struct xfs_trans *tp,
struct xfs_inode *dp,
const struct xfs_name *name,
xfs_ino_t inum, /* new entry inode number */
xfs_extlen_t total) /* bmap's total block count */
{
struct xfs_da_args *args;
int rval;
int v; /* type-checking value */
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
if (inum) {
rval = xfs_dir_ino_validate(tp->t_mountp, inum);
if (rval)
return rval;
XFS_STATS_INC(dp->i_mount, xs_dir_create);
}
args = kmem_zalloc(sizeof(*args), KM_NOFS);
if (!args)
return -ENOMEM;
args->geo = dp->i_mount->m_dir_geo;
args->name = name->name;
args->namelen = name->len;
args->filetype = name->type;
args->hashval = xfs_dir2_hashname(dp->i_mount, name);
args->inumber = inum;
args->dp = dp;
args->total = total;
args->whichfork = XFS_DATA_FORK;
args->trans = tp;
args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
if (!inum)
args->op_flags |= XFS_DA_OP_JUSTCHECK;
if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
rval = xfs_dir2_sf_addname(args);
goto out_free;
}
rval = xfs_dir2_isblock(args, &v);
if (rval)
goto out_free;
if (v) {
rval = xfs_dir2_block_addname(args);
goto out_free;
}
rval = xfs_dir2_isleaf(args, &v);
if (rval)
goto out_free;
if (v)
rval = xfs_dir2_leaf_addname(args);
else
rval = xfs_dir2_node_addname(args);
out_free:
kmem_free(args);
return rval;
}
/*
* If doing a CI lookup and case-insensitive match, dup actual name into
* args.value. Return EEXIST for success (ie. name found) or an error.
*/
int
xfs_dir_cilookup_result(
struct xfs_da_args *args,
const unsigned char *name,
int len)
{
if (args->cmpresult == XFS_CMP_DIFFERENT)
return -ENOENT;
if (args->cmpresult != XFS_CMP_CASE ||
!(args->op_flags & XFS_DA_OP_CILOOKUP))
return -EEXIST;
args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL);
if (!args->value)
return -ENOMEM;
memcpy(args->value, name, len);
args->valuelen = len;
return -EEXIST;
}
/*
* Lookup a name in a directory, give back the inode number.
* If ci_name is not NULL, returns the actual name in ci_name if it differs
* to name, or ci_name->name is set to NULL for an exact match.
*/
int
xfs_dir_lookup(
struct xfs_trans *tp,
struct xfs_inode *dp,
const struct xfs_name *name,
xfs_ino_t *inum, /* out: inode number */
struct xfs_name *ci_name) /* out: actual name if CI match */
{
struct xfs_da_args *args;
int rval;
int v; /* type-checking value */
int lock_mode;
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
XFS_STATS_INC(dp->i_mount, xs_dir_lookup);
/*
* We need to use KM_NOFS here so that lockdep will not throw false
* positive deadlock warnings on a non-transactional lookup path. It is
* safe to recurse into inode recalim in that case, but lockdep can't
* easily be taught about it. Hence KM_NOFS avoids having to add more
* lockdep Doing this avoids having to add a bunch of lockdep class
* annotations into the reclaim path for the ilock.
*/
args = kmem_zalloc(sizeof(*args), KM_NOFS);
args->geo = dp->i_mount->m_dir_geo;
args->name = name->name;
args->namelen = name->len;
args->filetype = name->type;
args->hashval = xfs_dir2_hashname(dp->i_mount, name);
args->dp = dp;
args->whichfork = XFS_DATA_FORK;
args->trans = tp;
args->op_flags = XFS_DA_OP_OKNOENT;
if (ci_name)
args->op_flags |= XFS_DA_OP_CILOOKUP;
lock_mode = xfs_ilock_data_map_shared(dp);
if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
rval = xfs_dir2_sf_lookup(args);
goto out_check_rval;
}
rval = xfs_dir2_isblock(args, &v);
if (rval)
goto out_free;
if (v) {
rval = xfs_dir2_block_lookup(args);
goto out_check_rval;
}
rval = xfs_dir2_isleaf(args, &v);
if (rval)
goto out_free;
if (v)
rval = xfs_dir2_leaf_lookup(args);
else
rval = xfs_dir2_node_lookup(args);
out_check_rval:
if (rval == -EEXIST)
rval = 0;
if (!rval) {
*inum = args->inumber;
if (ci_name) {
ci_name->name = args->value;
ci_name->len = args->valuelen;
}
}
out_free:
xfs_iunlock(dp, lock_mode);
kmem_free(args);
return rval;
}
/*
* Remove an entry from a directory.
*/
int
xfs_dir_removename(
struct xfs_trans *tp,
struct xfs_inode *dp,
struct xfs_name *name,
xfs_ino_t ino,
xfs_extlen_t total) /* bmap's total block count */
{
struct xfs_da_args *args;
int rval;
int v; /* type-checking value */
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
XFS_STATS_INC(dp->i_mount, xs_dir_remove);
args = kmem_zalloc(sizeof(*args), KM_NOFS);
if (!args)
return -ENOMEM;
args->geo = dp->i_mount->m_dir_geo;
args->name = name->name;
args->namelen = name->len;
args->filetype = name->type;
args->hashval = xfs_dir2_hashname(dp->i_mount, name);
args->inumber = ino;
args->dp = dp;
args->total = total;
args->whichfork = XFS_DATA_FORK;
args->trans = tp;
if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
rval = xfs_dir2_sf_removename(args);
goto out_free;
}
rval = xfs_dir2_isblock(args, &v);
if (rval)
goto out_free;
if (v) {
rval = xfs_dir2_block_removename(args);
goto out_free;
}
rval = xfs_dir2_isleaf(args, &v);
if (rval)
goto out_free;
if (v)
rval = xfs_dir2_leaf_removename(args);
else
rval = xfs_dir2_node_removename(args);
out_free:
kmem_free(args);
return rval;
}
/*
* Replace the inode number of a directory entry.
*/
int
xfs_dir_replace(
struct xfs_trans *tp,
struct xfs_inode *dp,
const struct xfs_name *name, /* name of entry to replace */
xfs_ino_t inum, /* new inode number */
xfs_extlen_t total) /* bmap's total block count */
{
struct xfs_da_args *args;
int rval;
int v; /* type-checking value */
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
rval = xfs_dir_ino_validate(tp->t_mountp, inum);
if (rval)
return rval;
args = kmem_zalloc(sizeof(*args), KM_NOFS);
if (!args)
return -ENOMEM;
args->geo = dp->i_mount->m_dir_geo;
args->name = name->name;
args->namelen = name->len;
args->filetype = name->type;
args->hashval = xfs_dir2_hashname(dp->i_mount, name);
args->inumber = inum;
args->dp = dp;
args->total = total;
args->whichfork = XFS_DATA_FORK;
args->trans = tp;
if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
rval = xfs_dir2_sf_replace(args);
goto out_free;
}
rval = xfs_dir2_isblock(args, &v);
if (rval)
goto out_free;
if (v) {
rval = xfs_dir2_block_replace(args);
goto out_free;
}
rval = xfs_dir2_isleaf(args, &v);
if (rval)
goto out_free;
if (v)
rval = xfs_dir2_leaf_replace(args);
else
rval = xfs_dir2_node_replace(args);
out_free:
kmem_free(args);
return rval;
}
/*
* See if this entry can be added to the directory without allocating space.
*/
int
xfs_dir_canenter(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name) /* name of entry to add */
{
return xfs_dir_createname(tp, dp, name, 0, 0);
}
/*
* Utility routines.
*/
/*
* Add a block to the directory.
*
* This routine is for data and free blocks, not leaf/node blocks which are
* handled by xfs_da_grow_inode.
*/
int
xfs_dir2_grow_inode(
struct xfs_da_args *args,
int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */
xfs_dir2_db_t *dbp) /* out: block number added */
{
struct xfs_inode *dp = args->dp;
struct xfs_mount *mp = dp->i_mount;
xfs_fileoff_t bno; /* directory offset of new block */
int count; /* count of filesystem blocks */
int error;
trace_xfs_dir2_grow_inode(args, space);
/*
* Set lowest possible block in the space requested.
*/
bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE);
count = args->geo->fsbcount;
error = xfs_da_grow_inode_int(args, &bno, count);
if (error)
return error;
*dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno);
/*
* Update file's size if this is the data space and it grew.
*/
if (space == XFS_DIR2_DATA_SPACE) {
xfs_fsize_t size; /* directory file (data) size */
size = XFS_FSB_TO_B(mp, bno + count);
if (size > dp->i_disk_size) {
dp->i_disk_size = size;
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
}
}
return 0;
}
/*
* See if the directory is a single-block form directory.
*/
int
xfs_dir2_isblock(
struct xfs_da_args *args,
int *vp) /* out: 1 is block, 0 is not block */
{
xfs_fileoff_t last; /* last file offset */
int rval;
if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK)))
return rval;
rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize;
if (XFS_IS_CORRUPT(args->dp->i_mount,
rval != 0 &&
args->dp->i_disk_size != args->geo->blksize))
return -EFSCORRUPTED;
*vp = rval;
return 0;
}
/*
* See if the directory is a single-leaf form directory.
*/
int
xfs_dir2_isleaf(
struct xfs_da_args *args,
int *vp) /* out: 1 is block, 0 is not block */
{
xfs_fileoff_t last; /* last file offset */
int rval;
if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK)))
return rval;
*vp = last == args->geo->leafblk + args->geo->fsbcount;
return 0;
}
/*
* Remove the given block from the directory.
* This routine is used for data and free blocks, leaf/node are done
* by xfs_da_shrink_inode.
*/
int
xfs_dir2_shrink_inode(
struct xfs_da_args *args,
xfs_dir2_db_t db,
struct xfs_buf *bp)
{
xfs_fileoff_t bno; /* directory file offset */
xfs_dablk_t da; /* directory file offset */
int done; /* bunmap is finished */
struct xfs_inode *dp;
int error;
struct xfs_mount *mp;
struct xfs_trans *tp;
trace_xfs_dir2_shrink_inode(args, db);
dp = args->dp;
mp = dp->i_mount;
tp = args->trans;
da = xfs_dir2_db_to_da(args->geo, db);
/* Unmap the fsblock(s). */
error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, &done);
if (error) {
/*
* ENOSPC actually can happen if we're in a removename with no
* space reservation, and the resulting block removal would
* cause a bmap btree split or conversion from extents to btree.
* This can only happen for un-fragmented directory blocks,
* since you need to be punching out the middle of an extent.
* In this case we need to leave the block in the file, and not
* binval it. So the block has to be in a consistent empty
* state and appropriately logged. We don't free up the buffer,
* the caller can tell it hasn't happened since it got an error
* back.
*/
return error;
}
ASSERT(done);
/*
* Invalidate the buffer from the transaction.
*/
xfs_trans_binval(tp, bp);
/*
* If it's not a data block, we're done.
*/
if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET))
return 0;
/*
* If the block isn't the last one in the directory, we're done.
*/
if (dp->i_disk_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0))
return 0;
bno = da;
if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) {
/*
* This can't really happen unless there's kernel corruption.
*/
return error;
}
if (db == args->geo->datablk)
ASSERT(bno == 0);
else
ASSERT(bno > 0);
/*
* Set the size to the new last block.
*/
dp->i_disk_size = XFS_FSB_TO_B(mp, bno);
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
return 0;
}
/* Returns true if the directory entry name is valid. */
bool
xfs_dir2_namecheck(
const void *name,
size_t length)
{
/*
* MAXNAMELEN includes the trailing null, but (name/length) leave it
* out, so use >= for the length check.
*/
if (length >= MAXNAMELEN)
return false;
/* There shouldn't be any slashes or nulls here */
return !memchr(name, '/', length) && !memchr(name, 0, length);
}
xfs_dahash_t
xfs_dir2_hashname(
struct xfs_mount *mp,
const struct xfs_name *name)
{
if (unlikely(xfs_has_asciici(mp)))
return xfs_ascii_ci_hashname(name);
return xfs_da_hashname(name->name, name->len);
}
enum xfs_dacmp
xfs_dir2_compname(
struct xfs_da_args *args,
const unsigned char *name,
int len)
{
if (unlikely(xfs_has_asciici(args->dp->i_mount)))
return xfs_ascii_ci_compname(args, name, len);
return xfs_da_compname(args, name, len);
}
|