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 | ||
0650b554 DC |
88 | int |
89 | xfs_da_mount( | |
90 | struct xfs_mount *mp) | |
1da177e4 | 91 | { |
0650b554 DC |
92 | struct xfs_da_geometry *dageo; |
93 | int nodehdr_size; | |
37804376 DC |
94 | |
95 | ||
62118709 | 96 | ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb)); |
1da177e4 LT |
97 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
98 | XFS_MAX_BLOCKSIZE); | |
4bceb18f DC |
99 | |
100 | mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); | |
101 | mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); | |
102 | ||
1c9a5b2e | 103 | nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; |
0650b554 DC |
104 | mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), |
105 | KM_SLEEP | KM_MAYFAIL); | |
106 | mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), | |
107 | KM_SLEEP | KM_MAYFAIL); | |
108 | if (!mp->m_dir_geo || !mp->m_attr_geo) { | |
109 | kmem_free(mp->m_dir_geo); | |
110 | kmem_free(mp->m_attr_geo); | |
111 | return ENOMEM; | |
112 | } | |
113 | ||
114 | /* set up directory geometry */ | |
115 | dageo = mp->m_dir_geo; | |
116 | dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog; | |
117 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
118 | dageo->blksize = 1 << dageo->blklog; | |
119 | dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog; | |
30028030 DC |
120 | |
121 | /* | |
122 | * Now we've set up the block conversion variables, we can calculate the | |
123 | * segment block constants using the geometry structure. | |
124 | */ | |
125 | dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET); | |
126 | dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET); | |
127 | dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET); | |
0650b554 | 128 | dageo->node_ents = (dageo->blksize - nodehdr_size) / |
37804376 | 129 | (uint)sizeof(xfs_da_node_entry_t); |
0650b554 DC |
130 | dageo->magicpct = (dageo->blksize * 37) / 100; |
131 | ||
132 | /* set up attribute geometry - single fsb only */ | |
133 | dageo = mp->m_attr_geo; | |
134 | dageo->blklog = mp->m_sb.sb_blocklog; | |
135 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
136 | dageo->blksize = 1 << dageo->blklog; | |
137 | dageo->fsbcount = 1; | |
138 | dageo->node_ents = (dageo->blksize - nodehdr_size) / | |
37804376 | 139 | (uint)sizeof(xfs_da_node_entry_t); |
0650b554 | 140 | dageo->magicpct = (dageo->blksize * 37) / 100; |
37804376 | 141 | |
189f4bf2 BN |
142 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
143 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
144 | else | |
145 | mp->m_dirnameops = &xfs_default_nameops; | |
32c5483a | 146 | |
0650b554 DC |
147 | /* XXX: these are to be removed as code is converted to use geo */ |
148 | mp->m_dirblksize = mp->m_dir_geo->blksize; | |
149 | mp->m_dirblkfsbs = mp->m_dir_geo->fsbcount; | |
150 | mp->m_dirdatablk = mp->m_dir_geo->datablk; | |
151 | mp->m_dirleafblk = mp->m_dir_geo->leafblk; | |
152 | mp->m_dirfreeblk = mp->m_dir_geo->freeblk; | |
153 | mp->m_dir_node_ents = mp->m_dir_geo->node_ents; | |
154 | mp->m_dir_magicpct = mp->m_dir_geo->magicpct; | |
155 | mp->m_attr_node_ents = mp->m_attr_geo->node_ents; | |
156 | mp->m_attr_magicpct = mp->m_attr_geo->magicpct; | |
157 | return 0; | |
158 | } | |
159 | ||
160 | void | |
161 | xfs_da_unmount( | |
162 | struct xfs_mount *mp) | |
163 | { | |
164 | kmem_free(mp->m_dir_geo); | |
165 | kmem_free(mp->m_attr_geo); | |
1da177e4 LT |
166 | } |
167 | ||
168 | /* | |
169 | * Return 1 if directory contains only "." and "..". | |
170 | */ | |
f6c2d1fa NS |
171 | int |
172 | xfs_dir_isempty( | |
173 | xfs_inode_t *dp) | |
1da177e4 | 174 | { |
ac8ba50f | 175 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 176 | |
abbede1b | 177 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 178 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 179 | return 1; |
1da177e4 LT |
180 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
181 | return 0; | |
ac8ba50f CH |
182 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
183 | return !sfp->count; | |
1da177e4 LT |
184 | } |
185 | ||
f6c2d1fa NS |
186 | /* |
187 | * Validate a given inode number. | |
188 | */ | |
189 | int | |
190 | xfs_dir_ino_validate( | |
191 | xfs_mount_t *mp, | |
192 | xfs_ino_t ino) | |
193 | { | |
194 | xfs_agblock_t agblkno; | |
195 | xfs_agino_t agino; | |
196 | xfs_agnumber_t agno; | |
197 | int ino_ok; | |
198 | int ioff; | |
199 | ||
200 | agno = XFS_INO_TO_AGNO(mp, ino); | |
201 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
202 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
203 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
204 | ino_ok = | |
205 | agno < mp->m_sb.sb_agcount && | |
206 | agblkno < mp->m_sb.sb_agblocks && | |
207 | agblkno != 0 && | |
208 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
209 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
210 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
211 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 212 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
213 | (unsigned long long) ino); |
214 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
215 | return XFS_ERROR(EFSCORRUPTED); | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | ||
1da177e4 LT |
220 | /* |
221 | * Initialize a directory with its "." and ".." entries. | |
222 | */ | |
f6c2d1fa NS |
223 | int |
224 | xfs_dir_init( | |
225 | xfs_trans_t *tp, | |
226 | xfs_inode_t *dp, | |
227 | xfs_inode_t *pdp) | |
1da177e4 | 228 | { |
a1358aa3 | 229 | struct xfs_da_args *args; |
f6c2d1fa | 230 | int error; |
1da177e4 | 231 | |
abbede1b | 232 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
233 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
234 | if (error) | |
1da177e4 | 235 | return error; |
a1358aa3 DC |
236 | |
237 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
238 | if (!args) | |
239 | return ENOMEM; | |
240 | ||
0650b554 | 241 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
242 | args->dp = dp; |
243 | args->trans = tp; | |
244 | error = xfs_dir2_sf_create(args, pdp->i_ino); | |
245 | kmem_free(args); | |
246 | return error; | |
1da177e4 LT |
247 | } |
248 | ||
249 | /* | |
250 | Enter a name in a directory. | |
251 | */ | |
f6c2d1fa NS |
252 | int |
253 | xfs_dir_createname( | |
254 | xfs_trans_t *tp, | |
255 | xfs_inode_t *dp, | |
556b8b16 | 256 | struct xfs_name *name, |
1da177e4 LT |
257 | xfs_ino_t inum, /* new entry inode number */ |
258 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
259 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
260 | xfs_extlen_t total) /* bmap's total block count */ | |
261 | { | |
a1358aa3 | 262 | struct xfs_da_args *args; |
f6c2d1fa | 263 | int rval; |
1da177e4 LT |
264 | int v; /* type-checking value */ |
265 | ||
abbede1b | 266 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
267 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
268 | if (rval) | |
1da177e4 | 269 | return rval; |
1da177e4 | 270 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 271 | |
a1358aa3 DC |
272 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
273 | if (!args) | |
274 | return ENOMEM; | |
275 | ||
0650b554 | 276 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
277 | args->name = name->name; |
278 | args->namelen = name->len; | |
279 | args->filetype = name->type; | |
280 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
281 | args->inumber = inum; | |
282 | args->dp = dp; | |
283 | args->firstblock = first; | |
284 | args->flist = flist; | |
285 | args->total = total; | |
286 | args->whichfork = XFS_DATA_FORK; | |
287 | args->trans = tp; | |
288 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; | |
289 | ||
290 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
291 | rval = xfs_dir2_sf_addname(args); | |
292 | goto out_free; | |
293 | } | |
294 | ||
7fb2cd4d | 295 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
296 | if (rval) |
297 | goto out_free; | |
298 | if (v) { | |
299 | rval = xfs_dir2_block_addname(args); | |
300 | goto out_free; | |
301 | } | |
302 | ||
7fb2cd4d | 303 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
304 | if (rval) |
305 | goto out_free; | |
306 | if (v) | |
307 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 308 | else |
a1358aa3 DC |
309 | rval = xfs_dir2_node_addname(args); |
310 | ||
311 | out_free: | |
312 | kmem_free(args); | |
1da177e4 LT |
313 | return rval; |
314 | } | |
315 | ||
384f3ced BN |
316 | /* |
317 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
318 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
319 | */ | |
320 | int | |
321 | xfs_dir_cilookup_result( | |
322 | struct xfs_da_args *args, | |
a3380ae3 | 323 | const unsigned char *name, |
384f3ced BN |
324 | int len) |
325 | { | |
326 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
327 | return ENOENT; | |
328 | if (args->cmpresult != XFS_CMP_CASE || | |
329 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
330 | return EEXIST; | |
331 | ||
3f52c2f0 | 332 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced BN |
333 | if (!args->value) |
334 | return ENOMEM; | |
335 | ||
336 | memcpy(args->value, name, len); | |
337 | args->valuelen = len; | |
338 | return EEXIST; | |
339 | } | |
340 | ||
1da177e4 LT |
341 | /* |
342 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
343 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
344 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 345 | */ |
384f3ced | 346 | |
f6c2d1fa NS |
347 | int |
348 | xfs_dir_lookup( | |
349 | xfs_trans_t *tp, | |
350 | xfs_inode_t *dp, | |
556b8b16 | 351 | struct xfs_name *name, |
384f3ced BN |
352 | xfs_ino_t *inum, /* out: inode number */ |
353 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 354 | { |
a1358aa3 | 355 | struct xfs_da_args *args; |
f6c2d1fa | 356 | int rval; |
1da177e4 LT |
357 | int v; /* type-checking value */ |
358 | ||
abbede1b | 359 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
360 | XFS_STATS_INC(xs_dir_lookup); |
361 | ||
a1358aa3 DC |
362 | /* |
363 | * We need to use KM_NOFS here so that lockdep will not throw false | |
364 | * positive deadlock warnings on a non-transactional lookup path. It is | |
365 | * safe to recurse into inode recalim in that case, but lockdep can't | |
366 | * easily be taught about it. Hence KM_NOFS avoids having to add more | |
367 | * lockdep Doing this avoids having to add a bunch of lockdep class | |
368 | * annotations into the reclaim path for the ilock. | |
369 | */ | |
370 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
0650b554 | 371 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
372 | args->name = name->name; |
373 | args->namelen = name->len; | |
374 | args->filetype = name->type; | |
375 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
376 | args->dp = dp; | |
377 | args->whichfork = XFS_DATA_FORK; | |
378 | args->trans = tp; | |
379 | args->op_flags = XFS_DA_OP_OKNOENT; | |
384f3ced | 380 | if (ci_name) |
a1358aa3 | 381 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
f6c2d1fa | 382 | |
a1358aa3 DC |
383 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
384 | rval = xfs_dir2_sf_lookup(args); | |
385 | goto out_check_rval; | |
386 | } | |
387 | ||
7fb2cd4d | 388 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
389 | if (rval) |
390 | goto out_free; | |
391 | if (v) { | |
392 | rval = xfs_dir2_block_lookup(args); | |
393 | goto out_check_rval; | |
394 | } | |
395 | ||
7fb2cd4d | 396 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
397 | if (rval) |
398 | goto out_free; | |
399 | if (v) | |
400 | rval = xfs_dir2_leaf_lookup(args); | |
1da177e4 | 401 | else |
a1358aa3 DC |
402 | rval = xfs_dir2_node_lookup(args); |
403 | ||
404 | out_check_rval: | |
1da177e4 LT |
405 | if (rval == EEXIST) |
406 | rval = 0; | |
384f3ced | 407 | if (!rval) { |
a1358aa3 | 408 | *inum = args->inumber; |
384f3ced | 409 | if (ci_name) { |
a1358aa3 DC |
410 | ci_name->name = args->value; |
411 | ci_name->len = args->valuelen; | |
384f3ced BN |
412 | } |
413 | } | |
a1358aa3 DC |
414 | out_free: |
415 | kmem_free(args); | |
1da177e4 LT |
416 | return rval; |
417 | } | |
418 | ||
419 | /* | |
420 | * Remove an entry from a directory. | |
421 | */ | |
f6c2d1fa NS |
422 | int |
423 | xfs_dir_removename( | |
424 | xfs_trans_t *tp, | |
425 | xfs_inode_t *dp, | |
556b8b16 | 426 | struct xfs_name *name, |
f6c2d1fa | 427 | xfs_ino_t ino, |
1da177e4 LT |
428 | xfs_fsblock_t *first, /* bmap's firstblock */ |
429 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
430 | xfs_extlen_t total) /* bmap's total block count */ | |
431 | { | |
a1358aa3 | 432 | struct xfs_da_args *args; |
f6c2d1fa | 433 | int rval; |
1da177e4 LT |
434 | int v; /* type-checking value */ |
435 | ||
abbede1b | 436 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 437 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 438 | |
a1358aa3 DC |
439 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
440 | if (!args) | |
441 | return ENOMEM; | |
442 | ||
0650b554 | 443 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
444 | args->name = name->name; |
445 | args->namelen = name->len; | |
446 | args->filetype = name->type; | |
447 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
448 | args->inumber = ino; | |
449 | args->dp = dp; | |
450 | args->firstblock = first; | |
451 | args->flist = flist; | |
452 | args->total = total; | |
453 | args->whichfork = XFS_DATA_FORK; | |
454 | args->trans = tp; | |
455 | ||
456 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
457 | rval = xfs_dir2_sf_removename(args); | |
458 | goto out_free; | |
459 | } | |
460 | ||
7fb2cd4d | 461 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
462 | if (rval) |
463 | goto out_free; | |
464 | if (v) { | |
465 | rval = xfs_dir2_block_removename(args); | |
466 | goto out_free; | |
467 | } | |
468 | ||
7fb2cd4d | 469 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
470 | if (rval) |
471 | goto out_free; | |
472 | if (v) | |
473 | rval = xfs_dir2_leaf_removename(args); | |
1da177e4 | 474 | else |
a1358aa3 DC |
475 | rval = xfs_dir2_node_removename(args); |
476 | out_free: | |
477 | kmem_free(args); | |
1da177e4 LT |
478 | return rval; |
479 | } | |
480 | ||
1da177e4 LT |
481 | /* |
482 | * Replace the inode number of a directory entry. | |
483 | */ | |
f6c2d1fa NS |
484 | int |
485 | xfs_dir_replace( | |
486 | xfs_trans_t *tp, | |
487 | xfs_inode_t *dp, | |
556b8b16 | 488 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
489 | xfs_ino_t inum, /* new inode number */ |
490 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
491 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
492 | xfs_extlen_t total) /* bmap's total block count */ | |
493 | { | |
a1358aa3 | 494 | struct xfs_da_args *args; |
f6c2d1fa | 495 | int rval; |
1da177e4 LT |
496 | int v; /* type-checking value */ |
497 | ||
abbede1b | 498 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 499 | |
a1358aa3 DC |
500 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
501 | if (rval) | |
1da177e4 | 502 | return rval; |
f6c2d1fa | 503 | |
a1358aa3 DC |
504 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
505 | if (!args) | |
506 | return ENOMEM; | |
507 | ||
0650b554 | 508 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
509 | args->name = name->name; |
510 | args->namelen = name->len; | |
511 | args->filetype = name->type; | |
512 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
513 | args->inumber = inum; | |
514 | args->dp = dp; | |
515 | args->firstblock = first; | |
516 | args->flist = flist; | |
517 | args->total = total; | |
518 | args->whichfork = XFS_DATA_FORK; | |
519 | args->trans = tp; | |
520 | ||
521 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
522 | rval = xfs_dir2_sf_replace(args); | |
523 | goto out_free; | |
524 | } | |
525 | ||
7fb2cd4d | 526 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
527 | if (rval) |
528 | goto out_free; | |
529 | if (v) { | |
530 | rval = xfs_dir2_block_replace(args); | |
531 | goto out_free; | |
532 | } | |
533 | ||
7fb2cd4d | 534 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
535 | if (rval) |
536 | goto out_free; | |
537 | if (v) | |
538 | rval = xfs_dir2_leaf_replace(args); | |
1da177e4 | 539 | else |
a1358aa3 DC |
540 | rval = xfs_dir2_node_replace(args); |
541 | out_free: | |
542 | kmem_free(args); | |
1da177e4 LT |
543 | return rval; |
544 | } | |
545 | ||
546 | /* | |
547 | * See if this entry can be added to the directory without allocating space. | |
556b8b16 | 548 | * First checks that the caller couldn't reserve enough space (resblks = 0). |
1da177e4 | 549 | */ |
f6c2d1fa NS |
550 | int |
551 | xfs_dir_canenter( | |
552 | xfs_trans_t *tp, | |
553 | xfs_inode_t *dp, | |
556b8b16 BN |
554 | struct xfs_name *name, /* name of entry to add */ |
555 | uint resblks) | |
1da177e4 | 556 | { |
a1358aa3 | 557 | struct xfs_da_args *args; |
f6c2d1fa | 558 | int rval; |
1da177e4 LT |
559 | int v; /* type-checking value */ |
560 | ||
556b8b16 BN |
561 | if (resblks) |
562 | return 0; | |
563 | ||
abbede1b | 564 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 565 | |
a1358aa3 DC |
566 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
567 | if (!args) | |
568 | return ENOMEM; | |
569 | ||
0650b554 | 570 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
571 | args->name = name->name; |
572 | args->namelen = name->len; | |
573 | args->filetype = name->type; | |
574 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
575 | args->dp = dp; | |
576 | args->whichfork = XFS_DATA_FORK; | |
577 | args->trans = tp; | |
578 | args->op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME | | |
6a178100 | 579 | XFS_DA_OP_OKNOENT; |
f6c2d1fa | 580 | |
a1358aa3 DC |
581 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
582 | rval = xfs_dir2_sf_addname(args); | |
583 | goto out_free; | |
584 | } | |
585 | ||
7fb2cd4d | 586 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
587 | if (rval) |
588 | goto out_free; | |
589 | if (v) { | |
590 | rval = xfs_dir2_block_addname(args); | |
591 | goto out_free; | |
592 | } | |
593 | ||
7fb2cd4d | 594 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
595 | if (rval) |
596 | goto out_free; | |
597 | if (v) | |
598 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 599 | else |
a1358aa3 DC |
600 | rval = xfs_dir2_node_addname(args); |
601 | out_free: | |
602 | kmem_free(args); | |
1da177e4 LT |
603 | return rval; |
604 | } | |
605 | ||
1da177e4 LT |
606 | /* |
607 | * Utility routines. | |
608 | */ | |
609 | ||
610 | /* | |
611 | * Add a block to the directory. | |
77936d02 CH |
612 | * |
613 | * This routine is for data and free blocks, not leaf/node blocks which are | |
614 | * handled by xfs_da_grow_inode. | |
1da177e4 | 615 | */ |
f6c2d1fa | 616 | int |
1da177e4 | 617 | xfs_dir2_grow_inode( |
77936d02 CH |
618 | struct xfs_da_args *args, |
619 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
620 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 621 | { |
77936d02 CH |
622 | struct xfs_inode *dp = args->dp; |
623 | struct xfs_mount *mp = dp->i_mount; | |
624 | xfs_fileoff_t bno; /* directory offset of new block */ | |
625 | int count; /* count of filesystem blocks */ | |
626 | int error; | |
1da177e4 | 627 | |
0b1b213f CH |
628 | trace_xfs_dir2_grow_inode(args, space); |
629 | ||
1da177e4 LT |
630 | /* |
631 | * Set lowest possible block in the space requested. | |
632 | */ | |
633 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
634 | count = mp->m_dirblkfsbs; | |
77936d02 CH |
635 | |
636 | error = xfs_da_grow_inode_int(args, &bno, count); | |
637 | if (error) | |
1da177e4 | 638 | return error; |
a7444053 | 639 | |
2998ab1d | 640 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
a7444053 | 641 | |
1da177e4 LT |
642 | /* |
643 | * Update file's size if this is the data space and it grew. | |
644 | */ | |
645 | if (space == XFS_DIR2_DATA_SPACE) { | |
646 | xfs_fsize_t size; /* directory file (data) size */ | |
647 | ||
648 | size = XFS_FSB_TO_B(mp, bno + count); | |
649 | if (size > dp->i_d.di_size) { | |
650 | dp->i_d.di_size = size; | |
77936d02 | 651 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
652 | } |
653 | } | |
654 | return 0; | |
655 | } | |
656 | ||
657 | /* | |
658 | * See if the directory is a single-block form directory. | |
659 | */ | |
f6c2d1fa | 660 | int |
1da177e4 | 661 | xfs_dir2_isblock( |
f6c2d1fa | 662 | xfs_inode_t *dp, |
1da177e4 LT |
663 | int *vp) /* out: 1 is block, 0 is not block */ |
664 | { | |
665 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
666 | xfs_mount_t *mp; |
667 | int rval; | |
1da177e4 LT |
668 | |
669 | mp = dp->i_mount; | |
7fb2cd4d | 670 | if ((rval = xfs_bmap_last_offset(dp, &last, XFS_DATA_FORK))) |
1da177e4 | 671 | return rval; |
1da177e4 LT |
672 | rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize; |
673 | ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize); | |
674 | *vp = rval; | |
675 | return 0; | |
676 | } | |
677 | ||
678 | /* | |
679 | * See if the directory is a single-leaf form directory. | |
680 | */ | |
f6c2d1fa | 681 | int |
1da177e4 | 682 | xfs_dir2_isleaf( |
f6c2d1fa | 683 | xfs_inode_t *dp, |
1da177e4 LT |
684 | int *vp) /* out: 1 is leaf, 0 is not leaf */ |
685 | { | |
686 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
687 | xfs_mount_t *mp; |
688 | int rval; | |
1da177e4 LT |
689 | |
690 | mp = dp->i_mount; | |
7fb2cd4d | 691 | if ((rval = xfs_bmap_last_offset(dp, &last, XFS_DATA_FORK))) |
1da177e4 | 692 | return rval; |
1da177e4 LT |
693 | *vp = last == mp->m_dirleafblk + (1 << mp->m_sb.sb_dirblklog); |
694 | return 0; | |
695 | } | |
696 | ||
1da177e4 LT |
697 | /* |
698 | * Remove the given block from the directory. | |
699 | * This routine is used for data and free blocks, leaf/node are done | |
700 | * by xfs_da_shrink_inode. | |
701 | */ | |
702 | int | |
703 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
704 | xfs_da_args_t *args, |
705 | xfs_dir2_db_t db, | |
1d9025e5 | 706 | struct xfs_buf *bp) |
1da177e4 LT |
707 | { |
708 | xfs_fileoff_t bno; /* directory file offset */ | |
709 | xfs_dablk_t da; /* directory file offset */ | |
710 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
711 | xfs_inode_t *dp; |
712 | int error; | |
713 | xfs_mount_t *mp; | |
714 | xfs_trans_t *tp; | |
1da177e4 | 715 | |
0b1b213f CH |
716 | trace_xfs_dir2_shrink_inode(args, db); |
717 | ||
1da177e4 LT |
718 | dp = args->dp; |
719 | mp = dp->i_mount; | |
720 | tp = args->trans; | |
2998ab1d | 721 | da = xfs_dir2_db_to_da(args->geo, db); |
1da177e4 LT |
722 | /* |
723 | * Unmap the fsblock(s). | |
724 | */ | |
725 | if ((error = xfs_bunmapi(tp, dp, da, mp->m_dirblkfsbs, | |
726 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, | |
b4e9181e | 727 | &done))) { |
1da177e4 LT |
728 | /* |
729 | * ENOSPC actually can happen if we're in a removename with | |
730 | * no space reservation, and the resulting block removal | |
731 | * would cause a bmap btree split or conversion from extents | |
732 | * to btree. This can only happen for un-fragmented | |
733 | * directory blocks, since you need to be punching out | |
734 | * the middle of an extent. | |
735 | * In this case we need to leave the block in the file, | |
736 | * and not binval it. | |
737 | * So the block has to be in a consistent empty state | |
738 | * and appropriately logged. | |
739 | * We don't free up the buffer, the caller can tell it | |
740 | * hasn't happened since it got an error back. | |
741 | */ | |
742 | return error; | |
743 | } | |
744 | ASSERT(done); | |
745 | /* | |
746 | * Invalidate the buffer from the transaction. | |
747 | */ | |
1d9025e5 | 748 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
749 | /* |
750 | * If it's not a data block, we're done. | |
751 | */ | |
30028030 | 752 | if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) |
1da177e4 LT |
753 | return 0; |
754 | /* | |
755 | * If the block isn't the last one in the directory, we're done. | |
756 | */ | |
9b3b5522 | 757 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) |
1da177e4 LT |
758 | return 0; |
759 | bno = da; | |
760 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
761 | /* | |
762 | * This can't really happen unless there's kernel corruption. | |
763 | */ | |
764 | return error; | |
765 | } | |
766 | if (db == mp->m_dirdatablk) | |
767 | ASSERT(bno == 0); | |
768 | else | |
769 | ASSERT(bno > 0); | |
770 | /* | |
771 | * Set the size to the new last block. | |
772 | */ | |
773 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
774 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
775 | return 0; | |
776 | } |