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; | |
0650b554 DC |
149 | mp->m_dir_node_ents = mp->m_dir_geo->node_ents; |
150 | mp->m_dir_magicpct = mp->m_dir_geo->magicpct; | |
151 | mp->m_attr_node_ents = mp->m_attr_geo->node_ents; | |
152 | mp->m_attr_magicpct = mp->m_attr_geo->magicpct; | |
153 | return 0; | |
154 | } | |
155 | ||
156 | void | |
157 | xfs_da_unmount( | |
158 | struct xfs_mount *mp) | |
159 | { | |
160 | kmem_free(mp->m_dir_geo); | |
161 | kmem_free(mp->m_attr_geo); | |
1da177e4 LT |
162 | } |
163 | ||
164 | /* | |
165 | * Return 1 if directory contains only "." and "..". | |
166 | */ | |
f6c2d1fa NS |
167 | int |
168 | xfs_dir_isempty( | |
169 | xfs_inode_t *dp) | |
1da177e4 | 170 | { |
ac8ba50f | 171 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 172 | |
abbede1b | 173 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 174 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 175 | return 1; |
1da177e4 LT |
176 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
177 | return 0; | |
ac8ba50f CH |
178 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
179 | return !sfp->count; | |
1da177e4 LT |
180 | } |
181 | ||
f6c2d1fa NS |
182 | /* |
183 | * Validate a given inode number. | |
184 | */ | |
185 | int | |
186 | xfs_dir_ino_validate( | |
187 | xfs_mount_t *mp, | |
188 | xfs_ino_t ino) | |
189 | { | |
190 | xfs_agblock_t agblkno; | |
191 | xfs_agino_t agino; | |
192 | xfs_agnumber_t agno; | |
193 | int ino_ok; | |
194 | int ioff; | |
195 | ||
196 | agno = XFS_INO_TO_AGNO(mp, ino); | |
197 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
198 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
199 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
200 | ino_ok = | |
201 | agno < mp->m_sb.sb_agcount && | |
202 | agblkno < mp->m_sb.sb_agblocks && | |
203 | agblkno != 0 && | |
204 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
205 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
206 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
207 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 208 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
209 | (unsigned long long) ino); |
210 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
211 | return XFS_ERROR(EFSCORRUPTED); | |
212 | } | |
213 | return 0; | |
214 | } | |
215 | ||
1da177e4 LT |
216 | /* |
217 | * Initialize a directory with its "." and ".." entries. | |
218 | */ | |
f6c2d1fa NS |
219 | int |
220 | xfs_dir_init( | |
221 | xfs_trans_t *tp, | |
222 | xfs_inode_t *dp, | |
223 | xfs_inode_t *pdp) | |
1da177e4 | 224 | { |
a1358aa3 | 225 | struct xfs_da_args *args; |
f6c2d1fa | 226 | int error; |
1da177e4 | 227 | |
abbede1b | 228 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
229 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
230 | if (error) | |
1da177e4 | 231 | return error; |
a1358aa3 DC |
232 | |
233 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
234 | if (!args) | |
235 | return ENOMEM; | |
236 | ||
0650b554 | 237 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
238 | args->dp = dp; |
239 | args->trans = tp; | |
240 | error = xfs_dir2_sf_create(args, pdp->i_ino); | |
241 | kmem_free(args); | |
242 | return error; | |
1da177e4 LT |
243 | } |
244 | ||
245 | /* | |
246 | Enter a name in a directory. | |
247 | */ | |
f6c2d1fa NS |
248 | int |
249 | xfs_dir_createname( | |
250 | xfs_trans_t *tp, | |
251 | xfs_inode_t *dp, | |
556b8b16 | 252 | struct xfs_name *name, |
1da177e4 LT |
253 | xfs_ino_t inum, /* new entry inode number */ |
254 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
255 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
256 | xfs_extlen_t total) /* bmap's total block count */ | |
257 | { | |
a1358aa3 | 258 | struct xfs_da_args *args; |
f6c2d1fa | 259 | int rval; |
1da177e4 LT |
260 | int v; /* type-checking value */ |
261 | ||
abbede1b | 262 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
263 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
264 | if (rval) | |
1da177e4 | 265 | return rval; |
1da177e4 | 266 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 267 | |
a1358aa3 DC |
268 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
269 | if (!args) | |
270 | return ENOMEM; | |
271 | ||
0650b554 | 272 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
273 | args->name = name->name; |
274 | args->namelen = name->len; | |
275 | args->filetype = name->type; | |
276 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
277 | args->inumber = inum; | |
278 | args->dp = dp; | |
279 | args->firstblock = first; | |
280 | args->flist = flist; | |
281 | args->total = total; | |
282 | args->whichfork = XFS_DATA_FORK; | |
283 | args->trans = tp; | |
284 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; | |
285 | ||
286 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
287 | rval = xfs_dir2_sf_addname(args); | |
288 | goto out_free; | |
289 | } | |
290 | ||
7fb2cd4d | 291 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
292 | if (rval) |
293 | goto out_free; | |
294 | if (v) { | |
295 | rval = xfs_dir2_block_addname(args); | |
296 | goto out_free; | |
297 | } | |
298 | ||
7fb2cd4d | 299 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
300 | if (rval) |
301 | goto out_free; | |
302 | if (v) | |
303 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 304 | else |
a1358aa3 DC |
305 | rval = xfs_dir2_node_addname(args); |
306 | ||
307 | out_free: | |
308 | kmem_free(args); | |
1da177e4 LT |
309 | return rval; |
310 | } | |
311 | ||
384f3ced BN |
312 | /* |
313 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
314 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
315 | */ | |
316 | int | |
317 | xfs_dir_cilookup_result( | |
318 | struct xfs_da_args *args, | |
a3380ae3 | 319 | const unsigned char *name, |
384f3ced BN |
320 | int len) |
321 | { | |
322 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
323 | return ENOENT; | |
324 | if (args->cmpresult != XFS_CMP_CASE || | |
325 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
326 | return EEXIST; | |
327 | ||
3f52c2f0 | 328 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced BN |
329 | if (!args->value) |
330 | return ENOMEM; | |
331 | ||
332 | memcpy(args->value, name, len); | |
333 | args->valuelen = len; | |
334 | return EEXIST; | |
335 | } | |
336 | ||
1da177e4 LT |
337 | /* |
338 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
339 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
340 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 341 | */ |
384f3ced | 342 | |
f6c2d1fa NS |
343 | int |
344 | xfs_dir_lookup( | |
345 | xfs_trans_t *tp, | |
346 | xfs_inode_t *dp, | |
556b8b16 | 347 | struct xfs_name *name, |
384f3ced BN |
348 | xfs_ino_t *inum, /* out: inode number */ |
349 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 350 | { |
a1358aa3 | 351 | struct xfs_da_args *args; |
f6c2d1fa | 352 | int rval; |
1da177e4 LT |
353 | int v; /* type-checking value */ |
354 | ||
abbede1b | 355 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
356 | XFS_STATS_INC(xs_dir_lookup); |
357 | ||
a1358aa3 DC |
358 | /* |
359 | * We need to use KM_NOFS here so that lockdep will not throw false | |
360 | * positive deadlock warnings on a non-transactional lookup path. It is | |
361 | * safe to recurse into inode recalim in that case, but lockdep can't | |
362 | * easily be taught about it. Hence KM_NOFS avoids having to add more | |
363 | * lockdep Doing this avoids having to add a bunch of lockdep class | |
364 | * annotations into the reclaim path for the ilock. | |
365 | */ | |
366 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
0650b554 | 367 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
368 | args->name = name->name; |
369 | args->namelen = name->len; | |
370 | args->filetype = name->type; | |
371 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
372 | args->dp = dp; | |
373 | args->whichfork = XFS_DATA_FORK; | |
374 | args->trans = tp; | |
375 | args->op_flags = XFS_DA_OP_OKNOENT; | |
384f3ced | 376 | if (ci_name) |
a1358aa3 | 377 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
f6c2d1fa | 378 | |
a1358aa3 DC |
379 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
380 | rval = xfs_dir2_sf_lookup(args); | |
381 | goto out_check_rval; | |
382 | } | |
383 | ||
7fb2cd4d | 384 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
385 | if (rval) |
386 | goto out_free; | |
387 | if (v) { | |
388 | rval = xfs_dir2_block_lookup(args); | |
389 | goto out_check_rval; | |
390 | } | |
391 | ||
7fb2cd4d | 392 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
393 | if (rval) |
394 | goto out_free; | |
395 | if (v) | |
396 | rval = xfs_dir2_leaf_lookup(args); | |
1da177e4 | 397 | else |
a1358aa3 DC |
398 | rval = xfs_dir2_node_lookup(args); |
399 | ||
400 | out_check_rval: | |
1da177e4 LT |
401 | if (rval == EEXIST) |
402 | rval = 0; | |
384f3ced | 403 | if (!rval) { |
a1358aa3 | 404 | *inum = args->inumber; |
384f3ced | 405 | if (ci_name) { |
a1358aa3 DC |
406 | ci_name->name = args->value; |
407 | ci_name->len = args->valuelen; | |
384f3ced BN |
408 | } |
409 | } | |
a1358aa3 DC |
410 | out_free: |
411 | kmem_free(args); | |
1da177e4 LT |
412 | return rval; |
413 | } | |
414 | ||
415 | /* | |
416 | * Remove an entry from a directory. | |
417 | */ | |
f6c2d1fa NS |
418 | int |
419 | xfs_dir_removename( | |
420 | xfs_trans_t *tp, | |
421 | xfs_inode_t *dp, | |
556b8b16 | 422 | struct xfs_name *name, |
f6c2d1fa | 423 | xfs_ino_t ino, |
1da177e4 LT |
424 | xfs_fsblock_t *first, /* bmap's firstblock */ |
425 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
426 | xfs_extlen_t total) /* bmap's total block count */ | |
427 | { | |
a1358aa3 | 428 | struct xfs_da_args *args; |
f6c2d1fa | 429 | int rval; |
1da177e4 LT |
430 | int v; /* type-checking value */ |
431 | ||
abbede1b | 432 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 433 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 434 | |
a1358aa3 DC |
435 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
436 | if (!args) | |
437 | return ENOMEM; | |
438 | ||
0650b554 | 439 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
440 | args->name = name->name; |
441 | args->namelen = name->len; | |
442 | args->filetype = name->type; | |
443 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
444 | args->inumber = ino; | |
445 | args->dp = dp; | |
446 | args->firstblock = first; | |
447 | args->flist = flist; | |
448 | args->total = total; | |
449 | args->whichfork = XFS_DATA_FORK; | |
450 | args->trans = tp; | |
451 | ||
452 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
453 | rval = xfs_dir2_sf_removename(args); | |
454 | goto out_free; | |
455 | } | |
456 | ||
7fb2cd4d | 457 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
458 | if (rval) |
459 | goto out_free; | |
460 | if (v) { | |
461 | rval = xfs_dir2_block_removename(args); | |
462 | goto out_free; | |
463 | } | |
464 | ||
7fb2cd4d | 465 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
466 | if (rval) |
467 | goto out_free; | |
468 | if (v) | |
469 | rval = xfs_dir2_leaf_removename(args); | |
1da177e4 | 470 | else |
a1358aa3 DC |
471 | rval = xfs_dir2_node_removename(args); |
472 | out_free: | |
473 | kmem_free(args); | |
1da177e4 LT |
474 | return rval; |
475 | } | |
476 | ||
1da177e4 LT |
477 | /* |
478 | * Replace the inode number of a directory entry. | |
479 | */ | |
f6c2d1fa NS |
480 | int |
481 | xfs_dir_replace( | |
482 | xfs_trans_t *tp, | |
483 | xfs_inode_t *dp, | |
556b8b16 | 484 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
485 | xfs_ino_t inum, /* new inode number */ |
486 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
487 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
488 | xfs_extlen_t total) /* bmap's total block count */ | |
489 | { | |
a1358aa3 | 490 | struct xfs_da_args *args; |
f6c2d1fa | 491 | int rval; |
1da177e4 LT |
492 | int v; /* type-checking value */ |
493 | ||
abbede1b | 494 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 495 | |
a1358aa3 DC |
496 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
497 | if (rval) | |
1da177e4 | 498 | return rval; |
f6c2d1fa | 499 | |
a1358aa3 DC |
500 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
501 | if (!args) | |
502 | return ENOMEM; | |
503 | ||
0650b554 | 504 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
505 | args->name = name->name; |
506 | args->namelen = name->len; | |
507 | args->filetype = name->type; | |
508 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
509 | args->inumber = inum; | |
510 | args->dp = dp; | |
511 | args->firstblock = first; | |
512 | args->flist = flist; | |
513 | args->total = total; | |
514 | args->whichfork = XFS_DATA_FORK; | |
515 | args->trans = tp; | |
516 | ||
517 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
518 | rval = xfs_dir2_sf_replace(args); | |
519 | goto out_free; | |
520 | } | |
521 | ||
7fb2cd4d | 522 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
523 | if (rval) |
524 | goto out_free; | |
525 | if (v) { | |
526 | rval = xfs_dir2_block_replace(args); | |
527 | goto out_free; | |
528 | } | |
529 | ||
7fb2cd4d | 530 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
531 | if (rval) |
532 | goto out_free; | |
533 | if (v) | |
534 | rval = xfs_dir2_leaf_replace(args); | |
1da177e4 | 535 | else |
a1358aa3 DC |
536 | rval = xfs_dir2_node_replace(args); |
537 | out_free: | |
538 | kmem_free(args); | |
1da177e4 LT |
539 | return rval; |
540 | } | |
541 | ||
542 | /* | |
543 | * See if this entry can be added to the directory without allocating space. | |
556b8b16 | 544 | * First checks that the caller couldn't reserve enough space (resblks = 0). |
1da177e4 | 545 | */ |
f6c2d1fa NS |
546 | int |
547 | xfs_dir_canenter( | |
548 | xfs_trans_t *tp, | |
549 | xfs_inode_t *dp, | |
556b8b16 BN |
550 | struct xfs_name *name, /* name of entry to add */ |
551 | uint resblks) | |
1da177e4 | 552 | { |
a1358aa3 | 553 | struct xfs_da_args *args; |
f6c2d1fa | 554 | int rval; |
1da177e4 LT |
555 | int v; /* type-checking value */ |
556 | ||
556b8b16 BN |
557 | if (resblks) |
558 | return 0; | |
559 | ||
abbede1b | 560 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 561 | |
a1358aa3 DC |
562 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
563 | if (!args) | |
564 | return ENOMEM; | |
565 | ||
0650b554 | 566 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
567 | args->name = name->name; |
568 | args->namelen = name->len; | |
569 | args->filetype = name->type; | |
570 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
571 | args->dp = dp; | |
572 | args->whichfork = XFS_DATA_FORK; | |
573 | args->trans = tp; | |
574 | args->op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME | | |
6a178100 | 575 | XFS_DA_OP_OKNOENT; |
f6c2d1fa | 576 | |
a1358aa3 DC |
577 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
578 | rval = xfs_dir2_sf_addname(args); | |
579 | goto out_free; | |
580 | } | |
581 | ||
7fb2cd4d | 582 | rval = xfs_dir2_isblock(dp, &v); |
a1358aa3 DC |
583 | if (rval) |
584 | goto out_free; | |
585 | if (v) { | |
586 | rval = xfs_dir2_block_addname(args); | |
587 | goto out_free; | |
588 | } | |
589 | ||
7fb2cd4d | 590 | rval = xfs_dir2_isleaf(dp, &v); |
a1358aa3 DC |
591 | if (rval) |
592 | goto out_free; | |
593 | if (v) | |
594 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 595 | else |
a1358aa3 DC |
596 | rval = xfs_dir2_node_addname(args); |
597 | out_free: | |
598 | kmem_free(args); | |
1da177e4 LT |
599 | return rval; |
600 | } | |
601 | ||
1da177e4 LT |
602 | /* |
603 | * Utility routines. | |
604 | */ | |
605 | ||
606 | /* | |
607 | * Add a block to the directory. | |
77936d02 CH |
608 | * |
609 | * This routine is for data and free blocks, not leaf/node blocks which are | |
610 | * handled by xfs_da_grow_inode. | |
1da177e4 | 611 | */ |
f6c2d1fa | 612 | int |
1da177e4 | 613 | xfs_dir2_grow_inode( |
77936d02 CH |
614 | struct xfs_da_args *args, |
615 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
616 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 617 | { |
77936d02 CH |
618 | struct xfs_inode *dp = args->dp; |
619 | struct xfs_mount *mp = dp->i_mount; | |
620 | xfs_fileoff_t bno; /* directory offset of new block */ | |
621 | int count; /* count of filesystem blocks */ | |
622 | int error; | |
1da177e4 | 623 | |
0b1b213f CH |
624 | trace_xfs_dir2_grow_inode(args, space); |
625 | ||
1da177e4 LT |
626 | /* |
627 | * Set lowest possible block in the space requested. | |
628 | */ | |
629 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
d6cf1305 | 630 | count = args->geo->fsbcount; |
77936d02 CH |
631 | |
632 | error = xfs_da_grow_inode_int(args, &bno, count); | |
633 | if (error) | |
1da177e4 | 634 | return error; |
a7444053 | 635 | |
2998ab1d | 636 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
a7444053 | 637 | |
1da177e4 LT |
638 | /* |
639 | * Update file's size if this is the data space and it grew. | |
640 | */ | |
641 | if (space == XFS_DIR2_DATA_SPACE) { | |
642 | xfs_fsize_t size; /* directory file (data) size */ | |
643 | ||
644 | size = XFS_FSB_TO_B(mp, bno + count); | |
645 | if (size > dp->i_d.di_size) { | |
646 | dp->i_d.di_size = size; | |
77936d02 | 647 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
648 | } |
649 | } | |
650 | return 0; | |
651 | } | |
652 | ||
653 | /* | |
654 | * See if the directory is a single-block form directory. | |
655 | */ | |
f6c2d1fa | 656 | int |
1da177e4 | 657 | xfs_dir2_isblock( |
f6c2d1fa | 658 | xfs_inode_t *dp, |
1da177e4 LT |
659 | int *vp) /* out: 1 is block, 0 is not block */ |
660 | { | |
661 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
662 | xfs_mount_t *mp; |
663 | int rval; | |
1da177e4 LT |
664 | |
665 | mp = dp->i_mount; | |
7fb2cd4d | 666 | if ((rval = xfs_bmap_last_offset(dp, &last, XFS_DATA_FORK))) |
1da177e4 | 667 | return rval; |
1da177e4 LT |
668 | rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize; |
669 | ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize); | |
670 | *vp = rval; | |
671 | return 0; | |
672 | } | |
673 | ||
674 | /* | |
675 | * See if the directory is a single-leaf form directory. | |
676 | */ | |
f6c2d1fa | 677 | int |
1da177e4 | 678 | xfs_dir2_isleaf( |
f6c2d1fa | 679 | xfs_inode_t *dp, |
1da177e4 LT |
680 | int *vp) /* out: 1 is leaf, 0 is not leaf */ |
681 | { | |
682 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
683 | xfs_mount_t *mp; |
684 | int rval; | |
1da177e4 LT |
685 | |
686 | mp = dp->i_mount; | |
7fb2cd4d | 687 | if ((rval = xfs_bmap_last_offset(dp, &last, XFS_DATA_FORK))) |
1da177e4 | 688 | return rval; |
7dda6e86 | 689 | *vp = last == mp->m_dir_geo->leafblk + (1 << mp->m_sb.sb_dirblklog); |
1da177e4 LT |
690 | return 0; |
691 | } | |
692 | ||
1da177e4 LT |
693 | /* |
694 | * Remove the given block from the directory. | |
695 | * This routine is used for data and free blocks, leaf/node are done | |
696 | * by xfs_da_shrink_inode. | |
697 | */ | |
698 | int | |
699 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
700 | xfs_da_args_t *args, |
701 | xfs_dir2_db_t db, | |
1d9025e5 | 702 | struct xfs_buf *bp) |
1da177e4 LT |
703 | { |
704 | xfs_fileoff_t bno; /* directory file offset */ | |
705 | xfs_dablk_t da; /* directory file offset */ | |
706 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
707 | xfs_inode_t *dp; |
708 | int error; | |
709 | xfs_mount_t *mp; | |
710 | xfs_trans_t *tp; | |
1da177e4 | 711 | |
0b1b213f CH |
712 | trace_xfs_dir2_shrink_inode(args, db); |
713 | ||
1da177e4 LT |
714 | dp = args->dp; |
715 | mp = dp->i_mount; | |
716 | tp = args->trans; | |
2998ab1d | 717 | da = xfs_dir2_db_to_da(args->geo, db); |
1da177e4 LT |
718 | /* |
719 | * Unmap the fsblock(s). | |
720 | */ | |
d6cf1305 | 721 | if ((error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, |
1da177e4 | 722 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, |
b4e9181e | 723 | &done))) { |
1da177e4 LT |
724 | /* |
725 | * ENOSPC actually can happen if we're in a removename with | |
726 | * no space reservation, and the resulting block removal | |
727 | * would cause a bmap btree split or conversion from extents | |
728 | * to btree. This can only happen for un-fragmented | |
729 | * directory blocks, since you need to be punching out | |
730 | * the middle of an extent. | |
731 | * In this case we need to leave the block in the file, | |
732 | * and not binval it. | |
733 | * So the block has to be in a consistent empty state | |
734 | * and appropriately logged. | |
735 | * We don't free up the buffer, the caller can tell it | |
736 | * hasn't happened since it got an error back. | |
737 | */ | |
738 | return error; | |
739 | } | |
740 | ASSERT(done); | |
741 | /* | |
742 | * Invalidate the buffer from the transaction. | |
743 | */ | |
1d9025e5 | 744 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
745 | /* |
746 | * If it's not a data block, we're done. | |
747 | */ | |
30028030 | 748 | if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) |
1da177e4 LT |
749 | return 0; |
750 | /* | |
751 | * If the block isn't the last one in the directory, we're done. | |
752 | */ | |
9b3b5522 | 753 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) |
1da177e4 LT |
754 | return 0; |
755 | bno = da; | |
756 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
757 | /* | |
758 | * This can't really happen unless there's kernel corruption. | |
759 | */ | |
760 | return error; | |
761 | } | |
7dda6e86 | 762 | if (db == args->geo->datablk) |
1da177e4 LT |
763 | ASSERT(bno == 0); |
764 | else | |
765 | ASSERT(bno > 0); | |
766 | /* | |
767 | * Set the size to the new last block. | |
768 | */ | |
769 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
770 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
771 | return 0; | |
772 | } |