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" | |
1da177e4 | 23 | #include "xfs_mount.h" |
57062787 | 24 | #include "xfs_da_format.h" |
a844f451 | 25 | #include "xfs_da_btree.h" |
1da177e4 | 26 | #include "xfs_inode.h" |
239880ef | 27 | #include "xfs_trans.h" |
a844f451 | 28 | #include "xfs_inode_item.h" |
1da177e4 | 29 | #include "xfs_bmap.h" |
2b9ab5ab | 30 | #include "xfs_dir2.h" |
57926640 | 31 | #include "xfs_dir2_priv.h" |
1da177e4 | 32 | #include "xfs_error.h" |
0b1b213f | 33 | #include "xfs_trace.h" |
1da177e4 | 34 | |
0cb97766 DC |
35 | struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR }; |
36 | ||
1b767ee3 DC |
37 | /* |
38 | * @mode, if set, indicates that the type field needs to be set up. | |
39 | * This uses the transformation from file mode to DT_* as defined in linux/fs.h | |
40 | * for file type specification. This will be propagated into the directory | |
41 | * structure if appropriate for the given operation and filesystem config. | |
42 | */ | |
43 | const unsigned char xfs_mode_to_ftype[S_IFMT >> S_SHIFT] = { | |
44 | [0] = XFS_DIR3_FT_UNKNOWN, | |
45 | [S_IFREG >> S_SHIFT] = XFS_DIR3_FT_REG_FILE, | |
46 | [S_IFDIR >> S_SHIFT] = XFS_DIR3_FT_DIR, | |
47 | [S_IFCHR >> S_SHIFT] = XFS_DIR3_FT_CHRDEV, | |
48 | [S_IFBLK >> S_SHIFT] = XFS_DIR3_FT_BLKDEV, | |
49 | [S_IFIFO >> S_SHIFT] = XFS_DIR3_FT_FIFO, | |
50 | [S_IFSOCK >> S_SHIFT] = XFS_DIR3_FT_SOCK, | |
51 | [S_IFLNK >> S_SHIFT] = XFS_DIR3_FT_SYMLINK, | |
52 | }; | |
1da177e4 | 53 | |
189f4bf2 BN |
54 | /* |
55 | * ASCII case-insensitive (ie. A-Z) support for directories that was | |
56 | * used in IRIX. | |
57 | */ | |
58 | STATIC xfs_dahash_t | |
59 | xfs_ascii_ci_hashname( | |
60 | struct xfs_name *name) | |
61 | { | |
62 | xfs_dahash_t hash; | |
63 | int i; | |
64 | ||
65 | for (i = 0, hash = 0; i < name->len; i++) | |
66 | hash = tolower(name->name[i]) ^ rol32(hash, 7); | |
67 | ||
68 | return hash; | |
69 | } | |
70 | ||
71 | STATIC enum xfs_dacmp | |
72 | xfs_ascii_ci_compname( | |
73 | struct xfs_da_args *args, | |
2bc75421 DC |
74 | const unsigned char *name, |
75 | int len) | |
189f4bf2 BN |
76 | { |
77 | enum xfs_dacmp result; | |
78 | int i; | |
79 | ||
80 | if (args->namelen != len) | |
81 | return XFS_CMP_DIFFERENT; | |
82 | ||
83 | result = XFS_CMP_EXACT; | |
84 | for (i = 0; i < len; i++) { | |
85 | if (args->name[i] == name[i]) | |
86 | continue; | |
87 | if (tolower(args->name[i]) != tolower(name[i])) | |
88 | return XFS_CMP_DIFFERENT; | |
89 | result = XFS_CMP_CASE; | |
90 | } | |
91 | ||
92 | return result; | |
93 | } | |
94 | ||
95 | static struct xfs_nameops xfs_ascii_ci_nameops = { | |
96 | .hashname = xfs_ascii_ci_hashname, | |
97 | .compname = xfs_ascii_ci_compname, | |
98 | }; | |
99 | ||
0650b554 DC |
100 | int |
101 | xfs_da_mount( | |
102 | struct xfs_mount *mp) | |
1da177e4 | 103 | { |
0650b554 DC |
104 | struct xfs_da_geometry *dageo; |
105 | int nodehdr_size; | |
37804376 DC |
106 | |
107 | ||
5d074a4f | 108 | ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT); |
1da177e4 LT |
109 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
110 | XFS_MAX_BLOCKSIZE); | |
4bceb18f DC |
111 | |
112 | mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); | |
113 | mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); | |
114 | ||
1c9a5b2e | 115 | nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; |
0650b554 DC |
116 | mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), |
117 | KM_SLEEP | KM_MAYFAIL); | |
118 | mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), | |
119 | KM_SLEEP | KM_MAYFAIL); | |
120 | if (!mp->m_dir_geo || !mp->m_attr_geo) { | |
121 | kmem_free(mp->m_dir_geo); | |
122 | kmem_free(mp->m_attr_geo); | |
2451337d | 123 | return -ENOMEM; |
0650b554 DC |
124 | } |
125 | ||
126 | /* set up directory geometry */ | |
127 | dageo = mp->m_dir_geo; | |
128 | dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog; | |
129 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
130 | dageo->blksize = 1 << dageo->blklog; | |
131 | dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog; | |
30028030 DC |
132 | |
133 | /* | |
134 | * Now we've set up the block conversion variables, we can calculate the | |
135 | * segment block constants using the geometry structure. | |
136 | */ | |
137 | dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET); | |
138 | dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET); | |
139 | dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET); | |
0650b554 | 140 | dageo->node_ents = (dageo->blksize - nodehdr_size) / |
37804376 | 141 | (uint)sizeof(xfs_da_node_entry_t); |
0650b554 DC |
142 | dageo->magicpct = (dageo->blksize * 37) / 100; |
143 | ||
144 | /* set up attribute geometry - single fsb only */ | |
145 | dageo = mp->m_attr_geo; | |
146 | dageo->blklog = mp->m_sb.sb_blocklog; | |
147 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
148 | dageo->blksize = 1 << dageo->blklog; | |
149 | dageo->fsbcount = 1; | |
150 | dageo->node_ents = (dageo->blksize - nodehdr_size) / | |
37804376 | 151 | (uint)sizeof(xfs_da_node_entry_t); |
0650b554 | 152 | dageo->magicpct = (dageo->blksize * 37) / 100; |
37804376 | 153 | |
189f4bf2 BN |
154 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
155 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
156 | else | |
157 | mp->m_dirnameops = &xfs_default_nameops; | |
32c5483a | 158 | |
0650b554 DC |
159 | return 0; |
160 | } | |
161 | ||
162 | void | |
163 | xfs_da_unmount( | |
164 | struct xfs_mount *mp) | |
165 | { | |
166 | kmem_free(mp->m_dir_geo); | |
167 | kmem_free(mp->m_attr_geo); | |
1da177e4 LT |
168 | } |
169 | ||
170 | /* | |
171 | * Return 1 if directory contains only "." and "..". | |
172 | */ | |
f6c2d1fa NS |
173 | int |
174 | xfs_dir_isempty( | |
175 | xfs_inode_t *dp) | |
1da177e4 | 176 | { |
ac8ba50f | 177 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 178 | |
abbede1b | 179 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 180 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 181 | return 1; |
1da177e4 LT |
182 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
183 | return 0; | |
ac8ba50f CH |
184 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
185 | return !sfp->count; | |
1da177e4 LT |
186 | } |
187 | ||
f6c2d1fa NS |
188 | /* |
189 | * Validate a given inode number. | |
190 | */ | |
191 | int | |
192 | xfs_dir_ino_validate( | |
193 | xfs_mount_t *mp, | |
194 | xfs_ino_t ino) | |
195 | { | |
196 | xfs_agblock_t agblkno; | |
197 | xfs_agino_t agino; | |
198 | xfs_agnumber_t agno; | |
199 | int ino_ok; | |
200 | int ioff; | |
201 | ||
202 | agno = XFS_INO_TO_AGNO(mp, ino); | |
203 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
204 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
205 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
206 | ino_ok = | |
207 | agno < mp->m_sb.sb_agcount && | |
208 | agblkno < mp->m_sb.sb_agblocks && | |
209 | agblkno != 0 && | |
210 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
211 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
212 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
213 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 214 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
215 | (unsigned long long) ino); |
216 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 217 | return -EFSCORRUPTED; |
f6c2d1fa NS |
218 | } |
219 | return 0; | |
220 | } | |
221 | ||
1da177e4 LT |
222 | /* |
223 | * Initialize a directory with its "." and ".." entries. | |
224 | */ | |
f6c2d1fa NS |
225 | int |
226 | xfs_dir_init( | |
227 | xfs_trans_t *tp, | |
228 | xfs_inode_t *dp, | |
229 | xfs_inode_t *pdp) | |
1da177e4 | 230 | { |
a1358aa3 | 231 | struct xfs_da_args *args; |
f6c2d1fa | 232 | int error; |
1da177e4 | 233 | |
abbede1b | 234 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
235 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
236 | if (error) | |
1da177e4 | 237 | return error; |
a1358aa3 DC |
238 | |
239 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
240 | if (!args) | |
2451337d | 241 | return -ENOMEM; |
a1358aa3 | 242 | |
0650b554 | 243 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
244 | args->dp = dp; |
245 | args->trans = tp; | |
246 | error = xfs_dir2_sf_create(args, pdp->i_ino); | |
247 | kmem_free(args); | |
248 | return error; | |
1da177e4 LT |
249 | } |
250 | ||
251 | /* | |
b16ed7c1 ES |
252 | * Enter a name in a directory, or check for available space. |
253 | * If inum is 0, only the available space test is performed. | |
1da177e4 | 254 | */ |
f6c2d1fa NS |
255 | int |
256 | xfs_dir_createname( | |
257 | xfs_trans_t *tp, | |
258 | xfs_inode_t *dp, | |
556b8b16 | 259 | struct xfs_name *name, |
1da177e4 LT |
260 | xfs_ino_t inum, /* new entry inode number */ |
261 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
262 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
263 | xfs_extlen_t total) /* bmap's total block count */ | |
264 | { | |
a1358aa3 | 265 | struct xfs_da_args *args; |
f6c2d1fa | 266 | int rval; |
1da177e4 LT |
267 | int v; /* type-checking value */ |
268 | ||
abbede1b | 269 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
b16ed7c1 ES |
270 | if (inum) { |
271 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); | |
272 | if (rval) | |
273 | return rval; | |
274 | XFS_STATS_INC(xs_dir_create); | |
275 | } | |
f6c2d1fa | 276 | |
a1358aa3 DC |
277 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
278 | if (!args) | |
2451337d | 279 | return -ENOMEM; |
a1358aa3 | 280 | |
0650b554 | 281 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
282 | args->name = name->name; |
283 | args->namelen = name->len; | |
284 | args->filetype = name->type; | |
285 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
286 | args->inumber = inum; | |
287 | args->dp = dp; | |
288 | args->firstblock = first; | |
289 | args->flist = flist; | |
290 | args->total = total; | |
291 | args->whichfork = XFS_DATA_FORK; | |
292 | args->trans = tp; | |
293 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; | |
b16ed7c1 ES |
294 | if (!inum) |
295 | args->op_flags |= XFS_DA_OP_JUSTCHECK; | |
a1358aa3 DC |
296 | |
297 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
298 | rval = xfs_dir2_sf_addname(args); | |
299 | goto out_free; | |
300 | } | |
301 | ||
53f82db0 | 302 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
303 | if (rval) |
304 | goto out_free; | |
305 | if (v) { | |
306 | rval = xfs_dir2_block_addname(args); | |
307 | goto out_free; | |
308 | } | |
309 | ||
53f82db0 | 310 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
311 | if (rval) |
312 | goto out_free; | |
313 | if (v) | |
314 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 315 | else |
a1358aa3 DC |
316 | rval = xfs_dir2_node_addname(args); |
317 | ||
318 | out_free: | |
319 | kmem_free(args); | |
1da177e4 LT |
320 | return rval; |
321 | } | |
322 | ||
384f3ced BN |
323 | /* |
324 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
325 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
326 | */ | |
327 | int | |
328 | xfs_dir_cilookup_result( | |
329 | struct xfs_da_args *args, | |
a3380ae3 | 330 | const unsigned char *name, |
384f3ced BN |
331 | int len) |
332 | { | |
333 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
2451337d | 334 | return -ENOENT; |
384f3ced BN |
335 | if (args->cmpresult != XFS_CMP_CASE || |
336 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
2451337d | 337 | return -EEXIST; |
384f3ced | 338 | |
3f52c2f0 | 339 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced | 340 | if (!args->value) |
2451337d | 341 | return -ENOMEM; |
384f3ced BN |
342 | |
343 | memcpy(args->value, name, len); | |
344 | args->valuelen = len; | |
2451337d | 345 | return -EEXIST; |
384f3ced BN |
346 | } |
347 | ||
1da177e4 LT |
348 | /* |
349 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
350 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
351 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 352 | */ |
384f3ced | 353 | |
f6c2d1fa NS |
354 | int |
355 | xfs_dir_lookup( | |
356 | xfs_trans_t *tp, | |
357 | xfs_inode_t *dp, | |
556b8b16 | 358 | struct xfs_name *name, |
384f3ced BN |
359 | xfs_ino_t *inum, /* out: inode number */ |
360 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 361 | { |
a1358aa3 | 362 | struct xfs_da_args *args; |
f6c2d1fa | 363 | int rval; |
1da177e4 LT |
364 | int v; /* type-checking value */ |
365 | ||
abbede1b | 366 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
367 | XFS_STATS_INC(xs_dir_lookup); |
368 | ||
a1358aa3 DC |
369 | /* |
370 | * We need to use KM_NOFS here so that lockdep will not throw false | |
371 | * positive deadlock warnings on a non-transactional lookup path. It is | |
372 | * safe to recurse into inode recalim in that case, but lockdep can't | |
373 | * easily be taught about it. Hence KM_NOFS avoids having to add more | |
374 | * lockdep Doing this avoids having to add a bunch of lockdep class | |
375 | * annotations into the reclaim path for the ilock. | |
376 | */ | |
377 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
0650b554 | 378 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
379 | args->name = name->name; |
380 | args->namelen = name->len; | |
381 | args->filetype = name->type; | |
382 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
383 | args->dp = dp; | |
384 | args->whichfork = XFS_DATA_FORK; | |
385 | args->trans = tp; | |
386 | args->op_flags = XFS_DA_OP_OKNOENT; | |
384f3ced | 387 | if (ci_name) |
a1358aa3 | 388 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
f6c2d1fa | 389 | |
a1358aa3 DC |
390 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
391 | rval = xfs_dir2_sf_lookup(args); | |
392 | goto out_check_rval; | |
393 | } | |
394 | ||
53f82db0 | 395 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
396 | if (rval) |
397 | goto out_free; | |
398 | if (v) { | |
399 | rval = xfs_dir2_block_lookup(args); | |
400 | goto out_check_rval; | |
401 | } | |
402 | ||
53f82db0 | 403 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
404 | if (rval) |
405 | goto out_free; | |
406 | if (v) | |
407 | rval = xfs_dir2_leaf_lookup(args); | |
1da177e4 | 408 | else |
a1358aa3 DC |
409 | rval = xfs_dir2_node_lookup(args); |
410 | ||
411 | out_check_rval: | |
2451337d | 412 | if (rval == -EEXIST) |
1da177e4 | 413 | rval = 0; |
384f3ced | 414 | if (!rval) { |
a1358aa3 | 415 | *inum = args->inumber; |
384f3ced | 416 | if (ci_name) { |
a1358aa3 DC |
417 | ci_name->name = args->value; |
418 | ci_name->len = args->valuelen; | |
384f3ced BN |
419 | } |
420 | } | |
a1358aa3 DC |
421 | out_free: |
422 | kmem_free(args); | |
1da177e4 LT |
423 | return rval; |
424 | } | |
425 | ||
426 | /* | |
427 | * Remove an entry from a directory. | |
428 | */ | |
f6c2d1fa NS |
429 | int |
430 | xfs_dir_removename( | |
431 | xfs_trans_t *tp, | |
432 | xfs_inode_t *dp, | |
556b8b16 | 433 | struct xfs_name *name, |
f6c2d1fa | 434 | xfs_ino_t ino, |
1da177e4 LT |
435 | xfs_fsblock_t *first, /* bmap's firstblock */ |
436 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
437 | xfs_extlen_t total) /* bmap's total block count */ | |
438 | { | |
a1358aa3 | 439 | struct xfs_da_args *args; |
f6c2d1fa | 440 | int rval; |
1da177e4 LT |
441 | int v; /* type-checking value */ |
442 | ||
abbede1b | 443 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 444 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 445 | |
a1358aa3 DC |
446 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
447 | if (!args) | |
2451337d | 448 | return -ENOMEM; |
a1358aa3 | 449 | |
0650b554 | 450 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
451 | args->name = name->name; |
452 | args->namelen = name->len; | |
453 | args->filetype = name->type; | |
454 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
455 | args->inumber = ino; | |
456 | args->dp = dp; | |
457 | args->firstblock = first; | |
458 | args->flist = flist; | |
459 | args->total = total; | |
460 | args->whichfork = XFS_DATA_FORK; | |
461 | args->trans = tp; | |
462 | ||
463 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
464 | rval = xfs_dir2_sf_removename(args); | |
465 | goto out_free; | |
466 | } | |
467 | ||
53f82db0 | 468 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
469 | if (rval) |
470 | goto out_free; | |
471 | if (v) { | |
472 | rval = xfs_dir2_block_removename(args); | |
473 | goto out_free; | |
474 | } | |
475 | ||
53f82db0 | 476 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
477 | if (rval) |
478 | goto out_free; | |
479 | if (v) | |
480 | rval = xfs_dir2_leaf_removename(args); | |
1da177e4 | 481 | else |
a1358aa3 DC |
482 | rval = xfs_dir2_node_removename(args); |
483 | out_free: | |
484 | kmem_free(args); | |
1da177e4 LT |
485 | return rval; |
486 | } | |
487 | ||
1da177e4 LT |
488 | /* |
489 | * Replace the inode number of a directory entry. | |
490 | */ | |
f6c2d1fa NS |
491 | int |
492 | xfs_dir_replace( | |
493 | xfs_trans_t *tp, | |
494 | xfs_inode_t *dp, | |
556b8b16 | 495 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
496 | xfs_ino_t inum, /* new inode number */ |
497 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
498 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
499 | xfs_extlen_t total) /* bmap's total block count */ | |
500 | { | |
a1358aa3 | 501 | struct xfs_da_args *args; |
f6c2d1fa | 502 | int rval; |
1da177e4 LT |
503 | int v; /* type-checking value */ |
504 | ||
abbede1b | 505 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 506 | |
a1358aa3 DC |
507 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
508 | if (rval) | |
1da177e4 | 509 | return rval; |
f6c2d1fa | 510 | |
a1358aa3 DC |
511 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
512 | if (!args) | |
2451337d | 513 | return -ENOMEM; |
a1358aa3 | 514 | |
0650b554 | 515 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
516 | args->name = name->name; |
517 | args->namelen = name->len; | |
518 | args->filetype = name->type; | |
519 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
520 | args->inumber = inum; | |
521 | args->dp = dp; | |
522 | args->firstblock = first; | |
523 | args->flist = flist; | |
524 | args->total = total; | |
525 | args->whichfork = XFS_DATA_FORK; | |
526 | args->trans = tp; | |
527 | ||
528 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
529 | rval = xfs_dir2_sf_replace(args); | |
530 | goto out_free; | |
531 | } | |
532 | ||
53f82db0 | 533 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
534 | if (rval) |
535 | goto out_free; | |
536 | if (v) { | |
537 | rval = xfs_dir2_block_replace(args); | |
538 | goto out_free; | |
539 | } | |
540 | ||
53f82db0 | 541 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
542 | if (rval) |
543 | goto out_free; | |
544 | if (v) | |
545 | rval = xfs_dir2_leaf_replace(args); | |
1da177e4 | 546 | else |
a1358aa3 DC |
547 | rval = xfs_dir2_node_replace(args); |
548 | out_free: | |
549 | kmem_free(args); | |
1da177e4 LT |
550 | return rval; |
551 | } | |
552 | ||
553 | /* | |
554 | * See if this entry can be added to the directory without allocating space. | |
555 | */ | |
f6c2d1fa NS |
556 | int |
557 | xfs_dir_canenter( | |
558 | xfs_trans_t *tp, | |
559 | xfs_inode_t *dp, | |
94f3cad5 | 560 | struct xfs_name *name) /* name of entry to add */ |
1da177e4 | 561 | { |
b16ed7c1 | 562 | return xfs_dir_createname(tp, dp, name, 0, NULL, NULL, 0); |
1da177e4 LT |
563 | } |
564 | ||
1da177e4 LT |
565 | /* |
566 | * Utility routines. | |
567 | */ | |
568 | ||
569 | /* | |
570 | * Add a block to the directory. | |
77936d02 CH |
571 | * |
572 | * This routine is for data and free blocks, not leaf/node blocks which are | |
573 | * handled by xfs_da_grow_inode. | |
1da177e4 | 574 | */ |
f6c2d1fa | 575 | int |
1da177e4 | 576 | xfs_dir2_grow_inode( |
77936d02 CH |
577 | struct xfs_da_args *args, |
578 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
579 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 580 | { |
77936d02 CH |
581 | struct xfs_inode *dp = args->dp; |
582 | struct xfs_mount *mp = dp->i_mount; | |
583 | xfs_fileoff_t bno; /* directory offset of new block */ | |
584 | int count; /* count of filesystem blocks */ | |
585 | int error; | |
1da177e4 | 586 | |
0b1b213f CH |
587 | trace_xfs_dir2_grow_inode(args, space); |
588 | ||
1da177e4 LT |
589 | /* |
590 | * Set lowest possible block in the space requested. | |
591 | */ | |
592 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
d6cf1305 | 593 | count = args->geo->fsbcount; |
77936d02 CH |
594 | |
595 | error = xfs_da_grow_inode_int(args, &bno, count); | |
596 | if (error) | |
1da177e4 | 597 | return error; |
a7444053 | 598 | |
2998ab1d | 599 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
a7444053 | 600 | |
1da177e4 LT |
601 | /* |
602 | * Update file's size if this is the data space and it grew. | |
603 | */ | |
604 | if (space == XFS_DIR2_DATA_SPACE) { | |
605 | xfs_fsize_t size; /* directory file (data) size */ | |
606 | ||
607 | size = XFS_FSB_TO_B(mp, bno + count); | |
608 | if (size > dp->i_d.di_size) { | |
609 | dp->i_d.di_size = size; | |
77936d02 | 610 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
611 | } |
612 | } | |
613 | return 0; | |
614 | } | |
615 | ||
616 | /* | |
617 | * See if the directory is a single-block form directory. | |
618 | */ | |
f6c2d1fa | 619 | int |
1da177e4 | 620 | xfs_dir2_isblock( |
53f82db0 DC |
621 | struct xfs_da_args *args, |
622 | int *vp) /* out: 1 is block, 0 is not block */ | |
1da177e4 | 623 | { |
53f82db0 DC |
624 | xfs_fileoff_t last; /* last file offset */ |
625 | int rval; | |
1da177e4 | 626 | |
53f82db0 | 627 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
1da177e4 | 628 | return rval; |
53f82db0 DC |
629 | rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize; |
630 | ASSERT(rval == 0 || args->dp->i_d.di_size == args->geo->blksize); | |
1da177e4 LT |
631 | *vp = rval; |
632 | return 0; | |
633 | } | |
634 | ||
635 | /* | |
636 | * See if the directory is a single-leaf form directory. | |
637 | */ | |
f6c2d1fa | 638 | int |
1da177e4 | 639 | xfs_dir2_isleaf( |
53f82db0 DC |
640 | struct xfs_da_args *args, |
641 | int *vp) /* out: 1 is block, 0 is not block */ | |
1da177e4 | 642 | { |
53f82db0 DC |
643 | xfs_fileoff_t last; /* last file offset */ |
644 | int rval; | |
1da177e4 | 645 | |
53f82db0 | 646 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
1da177e4 | 647 | return rval; |
53f82db0 | 648 | *vp = last == args->geo->leafblk + args->geo->fsbcount; |
1da177e4 LT |
649 | return 0; |
650 | } | |
651 | ||
1da177e4 LT |
652 | /* |
653 | * Remove the given block from the directory. | |
654 | * This routine is used for data and free blocks, leaf/node are done | |
655 | * by xfs_da_shrink_inode. | |
656 | */ | |
657 | int | |
658 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
659 | xfs_da_args_t *args, |
660 | xfs_dir2_db_t db, | |
1d9025e5 | 661 | struct xfs_buf *bp) |
1da177e4 LT |
662 | { |
663 | xfs_fileoff_t bno; /* directory file offset */ | |
664 | xfs_dablk_t da; /* directory file offset */ | |
665 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
666 | xfs_inode_t *dp; |
667 | int error; | |
668 | xfs_mount_t *mp; | |
669 | xfs_trans_t *tp; | |
1da177e4 | 670 | |
0b1b213f CH |
671 | trace_xfs_dir2_shrink_inode(args, db); |
672 | ||
1da177e4 LT |
673 | dp = args->dp; |
674 | mp = dp->i_mount; | |
675 | tp = args->trans; | |
2998ab1d | 676 | da = xfs_dir2_db_to_da(args->geo, db); |
1da177e4 LT |
677 | /* |
678 | * Unmap the fsblock(s). | |
679 | */ | |
d6cf1305 | 680 | if ((error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, |
1da177e4 | 681 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, |
b4e9181e | 682 | &done))) { |
1da177e4 LT |
683 | /* |
684 | * ENOSPC actually can happen if we're in a removename with | |
685 | * no space reservation, and the resulting block removal | |
686 | * would cause a bmap btree split or conversion from extents | |
687 | * to btree. This can only happen for un-fragmented | |
688 | * directory blocks, since you need to be punching out | |
689 | * the middle of an extent. | |
690 | * In this case we need to leave the block in the file, | |
691 | * and not binval it. | |
692 | * So the block has to be in a consistent empty state | |
693 | * and appropriately logged. | |
694 | * We don't free up the buffer, the caller can tell it | |
695 | * hasn't happened since it got an error back. | |
696 | */ | |
697 | return error; | |
698 | } | |
699 | ASSERT(done); | |
700 | /* | |
701 | * Invalidate the buffer from the transaction. | |
702 | */ | |
1d9025e5 | 703 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
704 | /* |
705 | * If it's not a data block, we're done. | |
706 | */ | |
30028030 | 707 | if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) |
1da177e4 LT |
708 | return 0; |
709 | /* | |
710 | * If the block isn't the last one in the directory, we're done. | |
711 | */ | |
9b3b5522 | 712 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) |
1da177e4 LT |
713 | return 0; |
714 | bno = da; | |
715 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
716 | /* | |
717 | * This can't really happen unless there's kernel corruption. | |
718 | */ | |
719 | return error; | |
720 | } | |
7dda6e86 | 721 | if (db == args->geo->datablk) |
1da177e4 LT |
722 | ASSERT(bno == 0); |
723 | else | |
724 | ASSERT(bno > 0); | |
725 | /* | |
726 | * Set the size to the new last block. | |
727 | */ | |
728 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
729 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
730 | return 0; | |
731 | } |