Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
a4fbe6ab | 20 | #include "xfs_format.h" |
239880ef DC |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_trans_resv.h" | |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_sb.h" |
25 | #include "xfs_ag.h" | |
1da177e4 | 26 | #include "xfs_mount.h" |
57062787 | 27 | #include "xfs_da_format.h" |
a844f451 | 28 | #include "xfs_da_btree.h" |
1da177e4 | 29 | #include "xfs_inode.h" |
239880ef | 30 | #include "xfs_trans.h" |
a844f451 | 31 | #include "xfs_inode_item.h" |
1da177e4 | 32 | #include "xfs_bmap.h" |
2b9ab5ab | 33 | #include "xfs_dir2.h" |
57926640 | 34 | #include "xfs_dir2_priv.h" |
1da177e4 | 35 | #include "xfs_error.h" |
0b1b213f | 36 | #include "xfs_trace.h" |
a4fbe6ab | 37 | #include "xfs_dinode.h" |
1da177e4 | 38 | |
0cb97766 DC |
39 | struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR }; |
40 | ||
1da177e4 | 41 | |
189f4bf2 BN |
42 | /* |
43 | * ASCII case-insensitive (ie. A-Z) support for directories that was | |
44 | * used in IRIX. | |
45 | */ | |
46 | STATIC xfs_dahash_t | |
47 | xfs_ascii_ci_hashname( | |
48 | struct xfs_name *name) | |
49 | { | |
50 | xfs_dahash_t hash; | |
51 | int i; | |
52 | ||
53 | for (i = 0, hash = 0; i < name->len; i++) | |
54 | hash = tolower(name->name[i]) ^ rol32(hash, 7); | |
55 | ||
56 | return hash; | |
57 | } | |
58 | ||
59 | STATIC enum xfs_dacmp | |
60 | xfs_ascii_ci_compname( | |
61 | struct xfs_da_args *args, | |
2bc75421 DC |
62 | const unsigned char *name, |
63 | int len) | |
189f4bf2 BN |
64 | { |
65 | enum xfs_dacmp result; | |
66 | int i; | |
67 | ||
68 | if (args->namelen != len) | |
69 | return XFS_CMP_DIFFERENT; | |
70 | ||
71 | result = XFS_CMP_EXACT; | |
72 | for (i = 0; i < len; i++) { | |
73 | if (args->name[i] == name[i]) | |
74 | continue; | |
75 | if (tolower(args->name[i]) != tolower(name[i])) | |
76 | return XFS_CMP_DIFFERENT; | |
77 | result = XFS_CMP_CASE; | |
78 | } | |
79 | ||
80 | return result; | |
81 | } | |
82 | ||
83 | static struct xfs_nameops xfs_ascii_ci_nameops = { | |
84 | .hashname = xfs_ascii_ci_hashname, | |
85 | .compname = xfs_ascii_ci_compname, | |
86 | }; | |
87 | ||
f6c2d1fa NS |
88 | void |
89 | xfs_dir_mount( | |
90 | xfs_mount_t *mp) | |
1da177e4 | 91 | { |
37804376 DC |
92 | int nodehdr_size; |
93 | ||
94 | ||
62118709 | 95 | ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb)); |
1da177e4 LT |
96 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
97 | XFS_MAX_BLOCKSIZE); | |
4bceb18f DC |
98 | |
99 | mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); | |
100 | mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); | |
101 | ||
1da177e4 LT |
102 | mp->m_dirblksize = 1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog); |
103 | mp->m_dirblkfsbs = 1 << mp->m_sb.sb_dirblklog; | |
bbaaf538 CH |
104 | mp->m_dirdatablk = xfs_dir2_db_to_da(mp, XFS_DIR2_DATA_FIRSTDB(mp)); |
105 | mp->m_dirleafblk = xfs_dir2_db_to_da(mp, XFS_DIR2_LEAF_FIRSTDB(mp)); | |
106 | mp->m_dirfreeblk = xfs_dir2_db_to_da(mp, XFS_DIR2_FREE_FIRSTDB(mp)); | |
37804376 | 107 | |
1c9a5b2e | 108 | nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; |
37804376 DC |
109 | mp->m_attr_node_ents = (mp->m_sb.sb_blocksize - nodehdr_size) / |
110 | (uint)sizeof(xfs_da_node_entry_t); | |
111 | mp->m_dir_node_ents = (mp->m_dirblksize - nodehdr_size) / | |
112 | (uint)sizeof(xfs_da_node_entry_t); | |
113 | ||
1da177e4 | 114 | mp->m_dir_magicpct = (mp->m_dirblksize * 37) / 100; |
189f4bf2 BN |
115 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
116 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
117 | else | |
118 | mp->m_dirnameops = &xfs_default_nameops; | |
32c5483a | 119 | |
1da177e4 LT |
120 | } |
121 | ||
122 | /* | |
123 | * Return 1 if directory contains only "." and "..". | |
124 | */ | |
f6c2d1fa NS |
125 | int |
126 | xfs_dir_isempty( | |
127 | xfs_inode_t *dp) | |
1da177e4 | 128 | { |
ac8ba50f | 129 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 130 | |
abbede1b | 131 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 132 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 133 | return 1; |
1da177e4 LT |
134 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
135 | return 0; | |
ac8ba50f CH |
136 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
137 | return !sfp->count; | |
1da177e4 LT |
138 | } |
139 | ||
f6c2d1fa NS |
140 | /* |
141 | * Validate a given inode number. | |
142 | */ | |
143 | int | |
144 | xfs_dir_ino_validate( | |
145 | xfs_mount_t *mp, | |
146 | xfs_ino_t ino) | |
147 | { | |
148 | xfs_agblock_t agblkno; | |
149 | xfs_agino_t agino; | |
150 | xfs_agnumber_t agno; | |
151 | int ino_ok; | |
152 | int ioff; | |
153 | ||
154 | agno = XFS_INO_TO_AGNO(mp, ino); | |
155 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
156 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
157 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
158 | ino_ok = | |
159 | agno < mp->m_sb.sb_agcount && | |
160 | agblkno < mp->m_sb.sb_agblocks && | |
161 | agblkno != 0 && | |
162 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
163 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
164 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
165 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 166 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
167 | (unsigned long long) ino); |
168 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
169 | return XFS_ERROR(EFSCORRUPTED); | |
170 | } | |
171 | return 0; | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /* |
175 | * Initialize a directory with its "." and ".." entries. | |
176 | */ | |
f6c2d1fa NS |
177 | int |
178 | xfs_dir_init( | |
179 | xfs_trans_t *tp, | |
180 | xfs_inode_t *dp, | |
181 | xfs_inode_t *pdp) | |
1da177e4 | 182 | { |
a1358aa3 | 183 | struct xfs_da_args *args; |
f6c2d1fa | 184 | int error; |
1da177e4 | 185 | |
abbede1b | 186 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
187 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
188 | if (error) | |
1da177e4 | 189 | return error; |
a1358aa3 DC |
190 | |
191 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
192 | if (!args) | |
193 | return ENOMEM; | |
194 | ||
195 | args->dp = dp; | |
196 | args->trans = tp; | |
197 | error = xfs_dir2_sf_create(args, pdp->i_ino); | |
198 | kmem_free(args); | |
199 | return error; | |
1da177e4 LT |
200 | } |
201 | ||
202 | /* | |
203 | Enter a name in a directory. | |
204 | */ | |
f6c2d1fa NS |
205 | int |
206 | xfs_dir_createname( | |
207 | xfs_trans_t *tp, | |
208 | xfs_inode_t *dp, | |
556b8b16 | 209 | struct xfs_name *name, |
1da177e4 LT |
210 | xfs_ino_t inum, /* new entry inode number */ |
211 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
212 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
213 | xfs_extlen_t total) /* bmap's total block count */ | |
214 | { | |
a1358aa3 | 215 | struct xfs_da_args *args; |
f6c2d1fa | 216 | int rval; |
1da177e4 LT |
217 | int v; /* type-checking value */ |
218 | ||
abbede1b | 219 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
220 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
221 | if (rval) | |
1da177e4 | 222 | return rval; |
1da177e4 | 223 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 224 | |
a1358aa3 DC |
225 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
226 | if (!args) | |
227 | return ENOMEM; | |
228 | ||
229 | args->name = name->name; | |
230 | args->namelen = name->len; | |
231 | args->filetype = name->type; | |
232 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
233 | args->inumber = inum; | |
234 | args->dp = dp; | |
235 | args->firstblock = first; | |
236 | args->flist = flist; | |
237 | args->total = total; | |
238 | args->whichfork = XFS_DATA_FORK; | |
239 | args->trans = tp; | |
240 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; | |
241 | ||
242 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
243 | rval = xfs_dir2_sf_addname(args); | |
244 | goto out_free; | |
245 | } | |
246 | ||
247 | rval = xfs_dir2_isblock(tp, dp, &v); | |
248 | if (rval) | |
249 | goto out_free; | |
250 | if (v) { | |
251 | rval = xfs_dir2_block_addname(args); | |
252 | goto out_free; | |
253 | } | |
254 | ||
255 | rval = xfs_dir2_isleaf(tp, dp, &v); | |
256 | if (rval) | |
257 | goto out_free; | |
258 | if (v) | |
259 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 260 | else |
a1358aa3 DC |
261 | rval = xfs_dir2_node_addname(args); |
262 | ||
263 | out_free: | |
264 | kmem_free(args); | |
1da177e4 LT |
265 | return rval; |
266 | } | |
267 | ||
384f3ced BN |
268 | /* |
269 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
270 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
271 | */ | |
272 | int | |
273 | xfs_dir_cilookup_result( | |
274 | struct xfs_da_args *args, | |
a3380ae3 | 275 | const unsigned char *name, |
384f3ced BN |
276 | int len) |
277 | { | |
278 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
279 | return ENOENT; | |
280 | if (args->cmpresult != XFS_CMP_CASE || | |
281 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
282 | return EEXIST; | |
283 | ||
3f52c2f0 | 284 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced BN |
285 | if (!args->value) |
286 | return ENOMEM; | |
287 | ||
288 | memcpy(args->value, name, len); | |
289 | args->valuelen = len; | |
290 | return EEXIST; | |
291 | } | |
292 | ||
1da177e4 LT |
293 | /* |
294 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
295 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
296 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 297 | */ |
384f3ced | 298 | |
f6c2d1fa NS |
299 | int |
300 | xfs_dir_lookup( | |
301 | xfs_trans_t *tp, | |
302 | xfs_inode_t *dp, | |
556b8b16 | 303 | struct xfs_name *name, |
384f3ced BN |
304 | xfs_ino_t *inum, /* out: inode number */ |
305 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 306 | { |
a1358aa3 | 307 | struct xfs_da_args *args; |
f6c2d1fa | 308 | int rval; |
1da177e4 LT |
309 | int v; /* type-checking value */ |
310 | ||
abbede1b | 311 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
312 | XFS_STATS_INC(xs_dir_lookup); |
313 | ||
a1358aa3 DC |
314 | /* |
315 | * We need to use KM_NOFS here so that lockdep will not throw false | |
316 | * positive deadlock warnings on a non-transactional lookup path. It is | |
317 | * safe to recurse into inode recalim in that case, but lockdep can't | |
318 | * easily be taught about it. Hence KM_NOFS avoids having to add more | |
319 | * lockdep Doing this avoids having to add a bunch of lockdep class | |
320 | * annotations into the reclaim path for the ilock. | |
321 | */ | |
322 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
323 | args->name = name->name; | |
324 | args->namelen = name->len; | |
325 | args->filetype = name->type; | |
326 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
327 | args->dp = dp; | |
328 | args->whichfork = XFS_DATA_FORK; | |
329 | args->trans = tp; | |
330 | args->op_flags = XFS_DA_OP_OKNOENT; | |
384f3ced | 331 | if (ci_name) |
a1358aa3 | 332 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
f6c2d1fa | 333 | |
a1358aa3 DC |
334 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
335 | rval = xfs_dir2_sf_lookup(args); | |
336 | goto out_check_rval; | |
337 | } | |
338 | ||
339 | rval = xfs_dir2_isblock(tp, dp, &v); | |
340 | if (rval) | |
341 | goto out_free; | |
342 | if (v) { | |
343 | rval = xfs_dir2_block_lookup(args); | |
344 | goto out_check_rval; | |
345 | } | |
346 | ||
347 | rval = xfs_dir2_isleaf(tp, dp, &v); | |
348 | if (rval) | |
349 | goto out_free; | |
350 | if (v) | |
351 | rval = xfs_dir2_leaf_lookup(args); | |
1da177e4 | 352 | else |
a1358aa3 DC |
353 | rval = xfs_dir2_node_lookup(args); |
354 | ||
355 | out_check_rval: | |
1da177e4 LT |
356 | if (rval == EEXIST) |
357 | rval = 0; | |
384f3ced | 358 | if (!rval) { |
a1358aa3 | 359 | *inum = args->inumber; |
384f3ced | 360 | if (ci_name) { |
a1358aa3 DC |
361 | ci_name->name = args->value; |
362 | ci_name->len = args->valuelen; | |
384f3ced BN |
363 | } |
364 | } | |
a1358aa3 DC |
365 | out_free: |
366 | kmem_free(args); | |
1da177e4 LT |
367 | return rval; |
368 | } | |
369 | ||
370 | /* | |
371 | * Remove an entry from a directory. | |
372 | */ | |
f6c2d1fa NS |
373 | int |
374 | xfs_dir_removename( | |
375 | xfs_trans_t *tp, | |
376 | xfs_inode_t *dp, | |
556b8b16 | 377 | struct xfs_name *name, |
f6c2d1fa | 378 | xfs_ino_t ino, |
1da177e4 LT |
379 | xfs_fsblock_t *first, /* bmap's firstblock */ |
380 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
381 | xfs_extlen_t total) /* bmap's total block count */ | |
382 | { | |
a1358aa3 | 383 | struct xfs_da_args *args; |
f6c2d1fa | 384 | int rval; |
1da177e4 LT |
385 | int v; /* type-checking value */ |
386 | ||
abbede1b | 387 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 388 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 389 | |
a1358aa3 DC |
390 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
391 | if (!args) | |
392 | return ENOMEM; | |
393 | ||
394 | args->name = name->name; | |
395 | args->namelen = name->len; | |
396 | args->filetype = name->type; | |
397 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
398 | args->inumber = ino; | |
399 | args->dp = dp; | |
400 | args->firstblock = first; | |
401 | args->flist = flist; | |
402 | args->total = total; | |
403 | args->whichfork = XFS_DATA_FORK; | |
404 | args->trans = tp; | |
405 | ||
406 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
407 | rval = xfs_dir2_sf_removename(args); | |
408 | goto out_free; | |
409 | } | |
410 | ||
411 | rval = xfs_dir2_isblock(tp, dp, &v); | |
412 | if (rval) | |
413 | goto out_free; | |
414 | if (v) { | |
415 | rval = xfs_dir2_block_removename(args); | |
416 | goto out_free; | |
417 | } | |
418 | ||
419 | rval = xfs_dir2_isleaf(tp, dp, &v); | |
420 | if (rval) | |
421 | goto out_free; | |
422 | if (v) | |
423 | rval = xfs_dir2_leaf_removename(args); | |
1da177e4 | 424 | else |
a1358aa3 DC |
425 | rval = xfs_dir2_node_removename(args); |
426 | out_free: | |
427 | kmem_free(args); | |
1da177e4 LT |
428 | return rval; |
429 | } | |
430 | ||
1da177e4 LT |
431 | /* |
432 | * Replace the inode number of a directory entry. | |
433 | */ | |
f6c2d1fa NS |
434 | int |
435 | xfs_dir_replace( | |
436 | xfs_trans_t *tp, | |
437 | xfs_inode_t *dp, | |
556b8b16 | 438 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
439 | xfs_ino_t inum, /* new inode number */ |
440 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
441 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
442 | xfs_extlen_t total) /* bmap's total block count */ | |
443 | { | |
a1358aa3 | 444 | struct xfs_da_args *args; |
f6c2d1fa | 445 | int rval; |
1da177e4 LT |
446 | int v; /* type-checking value */ |
447 | ||
abbede1b | 448 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 449 | |
a1358aa3 DC |
450 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
451 | if (rval) | |
1da177e4 | 452 | return rval; |
f6c2d1fa | 453 | |
a1358aa3 DC |
454 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
455 | if (!args) | |
456 | return ENOMEM; | |
457 | ||
458 | args->name = name->name; | |
459 | args->namelen = name->len; | |
460 | args->filetype = name->type; | |
461 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
462 | args->inumber = inum; | |
463 | args->dp = dp; | |
464 | args->firstblock = first; | |
465 | args->flist = flist; | |
466 | args->total = total; | |
467 | args->whichfork = XFS_DATA_FORK; | |
468 | args->trans = tp; | |
469 | ||
470 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
471 | rval = xfs_dir2_sf_replace(args); | |
472 | goto out_free; | |
473 | } | |
474 | ||
475 | rval = xfs_dir2_isblock(tp, dp, &v); | |
476 | if (rval) | |
477 | goto out_free; | |
478 | if (v) { | |
479 | rval = xfs_dir2_block_replace(args); | |
480 | goto out_free; | |
481 | } | |
482 | ||
483 | rval = xfs_dir2_isleaf(tp, dp, &v); | |
484 | if (rval) | |
485 | goto out_free; | |
486 | if (v) | |
487 | rval = xfs_dir2_leaf_replace(args); | |
1da177e4 | 488 | else |
a1358aa3 DC |
489 | rval = xfs_dir2_node_replace(args); |
490 | out_free: | |
491 | kmem_free(args); | |
1da177e4 LT |
492 | return rval; |
493 | } | |
494 | ||
495 | /* | |
496 | * See if this entry can be added to the directory without allocating space. | |
556b8b16 | 497 | * First checks that the caller couldn't reserve enough space (resblks = 0). |
1da177e4 | 498 | */ |
f6c2d1fa NS |
499 | int |
500 | xfs_dir_canenter( | |
501 | xfs_trans_t *tp, | |
502 | xfs_inode_t *dp, | |
556b8b16 BN |
503 | struct xfs_name *name, /* name of entry to add */ |
504 | uint resblks) | |
1da177e4 | 505 | { |
a1358aa3 | 506 | struct xfs_da_args *args; |
f6c2d1fa | 507 | int rval; |
1da177e4 LT |
508 | int v; /* type-checking value */ |
509 | ||
556b8b16 BN |
510 | if (resblks) |
511 | return 0; | |
512 | ||
abbede1b | 513 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 514 | |
a1358aa3 DC |
515 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
516 | if (!args) | |
517 | return ENOMEM; | |
518 | ||
519 | args->name = name->name; | |
520 | args->namelen = name->len; | |
521 | args->filetype = name->type; | |
522 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
523 | args->dp = dp; | |
524 | args->whichfork = XFS_DATA_FORK; | |
525 | args->trans = tp; | |
526 | args->op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME | | |
6a178100 | 527 | XFS_DA_OP_OKNOENT; |
f6c2d1fa | 528 | |
a1358aa3 DC |
529 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
530 | rval = xfs_dir2_sf_addname(args); | |
531 | goto out_free; | |
532 | } | |
533 | ||
534 | rval = xfs_dir2_isblock(tp, dp, &v); | |
535 | if (rval) | |
536 | goto out_free; | |
537 | if (v) { | |
538 | rval = xfs_dir2_block_addname(args); | |
539 | goto out_free; | |
540 | } | |
541 | ||
542 | rval = xfs_dir2_isleaf(tp, dp, &v); | |
543 | if (rval) | |
544 | goto out_free; | |
545 | if (v) | |
546 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 547 | else |
a1358aa3 DC |
548 | rval = xfs_dir2_node_addname(args); |
549 | out_free: | |
550 | kmem_free(args); | |
1da177e4 LT |
551 | return rval; |
552 | } | |
553 | ||
1da177e4 LT |
554 | /* |
555 | * Utility routines. | |
556 | */ | |
557 | ||
558 | /* | |
559 | * Add a block to the directory. | |
77936d02 CH |
560 | * |
561 | * This routine is for data and free blocks, not leaf/node blocks which are | |
562 | * handled by xfs_da_grow_inode. | |
1da177e4 | 563 | */ |
f6c2d1fa | 564 | int |
1da177e4 | 565 | xfs_dir2_grow_inode( |
77936d02 CH |
566 | struct xfs_da_args *args, |
567 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
568 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 569 | { |
77936d02 CH |
570 | struct xfs_inode *dp = args->dp; |
571 | struct xfs_mount *mp = dp->i_mount; | |
572 | xfs_fileoff_t bno; /* directory offset of new block */ | |
573 | int count; /* count of filesystem blocks */ | |
574 | int error; | |
1da177e4 | 575 | |
0b1b213f CH |
576 | trace_xfs_dir2_grow_inode(args, space); |
577 | ||
1da177e4 LT |
578 | /* |
579 | * Set lowest possible block in the space requested. | |
580 | */ | |
581 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
582 | count = mp->m_dirblkfsbs; | |
77936d02 CH |
583 | |
584 | error = xfs_da_grow_inode_int(args, &bno, count); | |
585 | if (error) | |
1da177e4 | 586 | return error; |
a7444053 | 587 | |
bbaaf538 | 588 | *dbp = xfs_dir2_da_to_db(mp, (xfs_dablk_t)bno); |
a7444053 | 589 | |
1da177e4 LT |
590 | /* |
591 | * Update file's size if this is the data space and it grew. | |
592 | */ | |
593 | if (space == XFS_DIR2_DATA_SPACE) { | |
594 | xfs_fsize_t size; /* directory file (data) size */ | |
595 | ||
596 | size = XFS_FSB_TO_B(mp, bno + count); | |
597 | if (size > dp->i_d.di_size) { | |
598 | dp->i_d.di_size = size; | |
77936d02 | 599 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
600 | } |
601 | } | |
602 | return 0; | |
603 | } | |
604 | ||
605 | /* | |
606 | * See if the directory is a single-block form directory. | |
607 | */ | |
f6c2d1fa | 608 | int |
1da177e4 | 609 | xfs_dir2_isblock( |
f6c2d1fa NS |
610 | xfs_trans_t *tp, |
611 | xfs_inode_t *dp, | |
1da177e4 LT |
612 | int *vp) /* out: 1 is block, 0 is not block */ |
613 | { | |
614 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
615 | xfs_mount_t *mp; |
616 | int rval; | |
1da177e4 LT |
617 | |
618 | mp = dp->i_mount; | |
f6c2d1fa | 619 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 620 | return rval; |
1da177e4 LT |
621 | rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize; |
622 | ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize); | |
623 | *vp = rval; | |
624 | return 0; | |
625 | } | |
626 | ||
627 | /* | |
628 | * See if the directory is a single-leaf form directory. | |
629 | */ | |
f6c2d1fa | 630 | int |
1da177e4 | 631 | xfs_dir2_isleaf( |
f6c2d1fa NS |
632 | xfs_trans_t *tp, |
633 | xfs_inode_t *dp, | |
1da177e4 LT |
634 | int *vp) /* out: 1 is leaf, 0 is not leaf */ |
635 | { | |
636 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
637 | xfs_mount_t *mp; |
638 | int rval; | |
1da177e4 LT |
639 | |
640 | mp = dp->i_mount; | |
f6c2d1fa | 641 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 642 | return rval; |
1da177e4 LT |
643 | *vp = last == mp->m_dirleafblk + (1 << mp->m_sb.sb_dirblklog); |
644 | return 0; | |
645 | } | |
646 | ||
1da177e4 LT |
647 | /* |
648 | * Remove the given block from the directory. | |
649 | * This routine is used for data and free blocks, leaf/node are done | |
650 | * by xfs_da_shrink_inode. | |
651 | */ | |
652 | int | |
653 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
654 | xfs_da_args_t *args, |
655 | xfs_dir2_db_t db, | |
1d9025e5 | 656 | struct xfs_buf *bp) |
1da177e4 LT |
657 | { |
658 | xfs_fileoff_t bno; /* directory file offset */ | |
659 | xfs_dablk_t da; /* directory file offset */ | |
660 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
661 | xfs_inode_t *dp; |
662 | int error; | |
663 | xfs_mount_t *mp; | |
664 | xfs_trans_t *tp; | |
1da177e4 | 665 | |
0b1b213f CH |
666 | trace_xfs_dir2_shrink_inode(args, db); |
667 | ||
1da177e4 LT |
668 | dp = args->dp; |
669 | mp = dp->i_mount; | |
670 | tp = args->trans; | |
bbaaf538 | 671 | da = xfs_dir2_db_to_da(mp, db); |
1da177e4 LT |
672 | /* |
673 | * Unmap the fsblock(s). | |
674 | */ | |
675 | if ((error = xfs_bunmapi(tp, dp, da, mp->m_dirblkfsbs, | |
676 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, | |
b4e9181e | 677 | &done))) { |
1da177e4 LT |
678 | /* |
679 | * ENOSPC actually can happen if we're in a removename with | |
680 | * no space reservation, and the resulting block removal | |
681 | * would cause a bmap btree split or conversion from extents | |
682 | * to btree. This can only happen for un-fragmented | |
683 | * directory blocks, since you need to be punching out | |
684 | * the middle of an extent. | |
685 | * In this case we need to leave the block in the file, | |
686 | * and not binval it. | |
687 | * So the block has to be in a consistent empty state | |
688 | * and appropriately logged. | |
689 | * We don't free up the buffer, the caller can tell it | |
690 | * hasn't happened since it got an error back. | |
691 | */ | |
692 | return error; | |
693 | } | |
694 | ASSERT(done); | |
695 | /* | |
696 | * Invalidate the buffer from the transaction. | |
697 | */ | |
1d9025e5 | 698 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
699 | /* |
700 | * If it's not a data block, we're done. | |
701 | */ | |
702 | if (db >= XFS_DIR2_LEAF_FIRSTDB(mp)) | |
703 | return 0; | |
704 | /* | |
705 | * If the block isn't the last one in the directory, we're done. | |
706 | */ | |
bbaaf538 | 707 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(mp, db + 1, 0)) |
1da177e4 LT |
708 | return 0; |
709 | bno = da; | |
710 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
711 | /* | |
712 | * This can't really happen unless there's kernel corruption. | |
713 | */ | |
714 | return error; | |
715 | } | |
716 | if (db == mp->m_dirdatablk) | |
717 | ASSERT(bno == 0); | |
718 | else | |
719 | ASSERT(bno > 0); | |
720 | /* | |
721 | * Set the size to the new last block. | |
722 | */ | |
723 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
724 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
725 | return 0; | |
726 | } |