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; | |
ff6d6af2 | 274 | XFS_STATS_INC(dp->i_mount, xs_dir_create); |
b16ed7c1 | 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 | 364 | int v; /* type-checking value */ |
dbad7c99 | 365 | int lock_mode; |
1da177e4 | 366 | |
abbede1b | 367 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
ff6d6af2 | 368 | XFS_STATS_INC(dp->i_mount, xs_dir_lookup); |
1da177e4 | 369 | |
a1358aa3 DC |
370 | /* |
371 | * We need to use KM_NOFS here so that lockdep will not throw false | |
372 | * positive deadlock warnings on a non-transactional lookup path. It is | |
373 | * safe to recurse into inode recalim in that case, but lockdep can't | |
374 | * easily be taught about it. Hence KM_NOFS avoids having to add more | |
375 | * lockdep Doing this avoids having to add a bunch of lockdep class | |
376 | * annotations into the reclaim path for the ilock. | |
377 | */ | |
378 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
0650b554 | 379 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
380 | args->name = name->name; |
381 | args->namelen = name->len; | |
382 | args->filetype = name->type; | |
383 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
384 | args->dp = dp; | |
385 | args->whichfork = XFS_DATA_FORK; | |
386 | args->trans = tp; | |
387 | args->op_flags = XFS_DA_OP_OKNOENT; | |
384f3ced | 388 | if (ci_name) |
a1358aa3 | 389 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
f6c2d1fa | 390 | |
dbad7c99 | 391 | lock_mode = xfs_ilock_data_map_shared(dp); |
a1358aa3 DC |
392 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
393 | rval = xfs_dir2_sf_lookup(args); | |
394 | goto out_check_rval; | |
395 | } | |
396 | ||
53f82db0 | 397 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
398 | if (rval) |
399 | goto out_free; | |
400 | if (v) { | |
401 | rval = xfs_dir2_block_lookup(args); | |
402 | goto out_check_rval; | |
403 | } | |
404 | ||
53f82db0 | 405 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
406 | if (rval) |
407 | goto out_free; | |
408 | if (v) | |
409 | rval = xfs_dir2_leaf_lookup(args); | |
1da177e4 | 410 | else |
a1358aa3 DC |
411 | rval = xfs_dir2_node_lookup(args); |
412 | ||
413 | out_check_rval: | |
2451337d | 414 | if (rval == -EEXIST) |
1da177e4 | 415 | rval = 0; |
384f3ced | 416 | if (!rval) { |
a1358aa3 | 417 | *inum = args->inumber; |
384f3ced | 418 | if (ci_name) { |
a1358aa3 DC |
419 | ci_name->name = args->value; |
420 | ci_name->len = args->valuelen; | |
384f3ced BN |
421 | } |
422 | } | |
a1358aa3 | 423 | out_free: |
dbad7c99 | 424 | xfs_iunlock(dp, lock_mode); |
a1358aa3 | 425 | kmem_free(args); |
1da177e4 LT |
426 | return rval; |
427 | } | |
428 | ||
429 | /* | |
430 | * Remove an entry from a directory. | |
431 | */ | |
f6c2d1fa NS |
432 | int |
433 | xfs_dir_removename( | |
434 | xfs_trans_t *tp, | |
435 | xfs_inode_t *dp, | |
556b8b16 | 436 | struct xfs_name *name, |
f6c2d1fa | 437 | xfs_ino_t ino, |
1da177e4 LT |
438 | xfs_fsblock_t *first, /* bmap's firstblock */ |
439 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
440 | xfs_extlen_t total) /* bmap's total block count */ | |
441 | { | |
a1358aa3 | 442 | struct xfs_da_args *args; |
f6c2d1fa | 443 | int rval; |
1da177e4 LT |
444 | int v; /* type-checking value */ |
445 | ||
abbede1b | 446 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
ff6d6af2 | 447 | XFS_STATS_INC(dp->i_mount, xs_dir_remove); |
f6c2d1fa | 448 | |
a1358aa3 DC |
449 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
450 | if (!args) | |
2451337d | 451 | return -ENOMEM; |
a1358aa3 | 452 | |
0650b554 | 453 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
454 | args->name = name->name; |
455 | args->namelen = name->len; | |
456 | args->filetype = name->type; | |
457 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
458 | args->inumber = ino; | |
459 | args->dp = dp; | |
460 | args->firstblock = first; | |
461 | args->flist = flist; | |
462 | args->total = total; | |
463 | args->whichfork = XFS_DATA_FORK; | |
464 | args->trans = tp; | |
465 | ||
466 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
467 | rval = xfs_dir2_sf_removename(args); | |
468 | goto out_free; | |
469 | } | |
470 | ||
53f82db0 | 471 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
472 | if (rval) |
473 | goto out_free; | |
474 | if (v) { | |
475 | rval = xfs_dir2_block_removename(args); | |
476 | goto out_free; | |
477 | } | |
478 | ||
53f82db0 | 479 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
480 | if (rval) |
481 | goto out_free; | |
482 | if (v) | |
483 | rval = xfs_dir2_leaf_removename(args); | |
1da177e4 | 484 | else |
a1358aa3 DC |
485 | rval = xfs_dir2_node_removename(args); |
486 | out_free: | |
487 | kmem_free(args); | |
1da177e4 LT |
488 | return rval; |
489 | } | |
490 | ||
1da177e4 LT |
491 | /* |
492 | * Replace the inode number of a directory entry. | |
493 | */ | |
f6c2d1fa NS |
494 | int |
495 | xfs_dir_replace( | |
496 | xfs_trans_t *tp, | |
497 | xfs_inode_t *dp, | |
556b8b16 | 498 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
499 | xfs_ino_t inum, /* new inode number */ |
500 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
501 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
502 | xfs_extlen_t total) /* bmap's total block count */ | |
503 | { | |
a1358aa3 | 504 | struct xfs_da_args *args; |
f6c2d1fa | 505 | int rval; |
1da177e4 LT |
506 | int v; /* type-checking value */ |
507 | ||
abbede1b | 508 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 509 | |
a1358aa3 DC |
510 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
511 | if (rval) | |
1da177e4 | 512 | return rval; |
f6c2d1fa | 513 | |
a1358aa3 DC |
514 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
515 | if (!args) | |
2451337d | 516 | return -ENOMEM; |
a1358aa3 | 517 | |
0650b554 | 518 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
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->inumber = inum; | |
524 | args->dp = dp; | |
525 | args->firstblock = first; | |
526 | args->flist = flist; | |
527 | args->total = total; | |
528 | args->whichfork = XFS_DATA_FORK; | |
529 | args->trans = tp; | |
530 | ||
531 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
532 | rval = xfs_dir2_sf_replace(args); | |
533 | goto out_free; | |
534 | } | |
535 | ||
53f82db0 | 536 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
537 | if (rval) |
538 | goto out_free; | |
539 | if (v) { | |
540 | rval = xfs_dir2_block_replace(args); | |
541 | goto out_free; | |
542 | } | |
543 | ||
53f82db0 | 544 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
545 | if (rval) |
546 | goto out_free; | |
547 | if (v) | |
548 | rval = xfs_dir2_leaf_replace(args); | |
1da177e4 | 549 | else |
a1358aa3 DC |
550 | rval = xfs_dir2_node_replace(args); |
551 | out_free: | |
552 | kmem_free(args); | |
1da177e4 LT |
553 | return rval; |
554 | } | |
555 | ||
556 | /* | |
557 | * See if this entry can be added to the directory without allocating space. | |
558 | */ | |
f6c2d1fa NS |
559 | int |
560 | xfs_dir_canenter( | |
561 | xfs_trans_t *tp, | |
562 | xfs_inode_t *dp, | |
94f3cad5 | 563 | struct xfs_name *name) /* name of entry to add */ |
1da177e4 | 564 | { |
b16ed7c1 | 565 | return xfs_dir_createname(tp, dp, name, 0, NULL, NULL, 0); |
1da177e4 LT |
566 | } |
567 | ||
1da177e4 LT |
568 | /* |
569 | * Utility routines. | |
570 | */ | |
571 | ||
572 | /* | |
573 | * Add a block to the directory. | |
77936d02 CH |
574 | * |
575 | * This routine is for data and free blocks, not leaf/node blocks which are | |
576 | * handled by xfs_da_grow_inode. | |
1da177e4 | 577 | */ |
f6c2d1fa | 578 | int |
1da177e4 | 579 | xfs_dir2_grow_inode( |
77936d02 CH |
580 | struct xfs_da_args *args, |
581 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
582 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 583 | { |
77936d02 CH |
584 | struct xfs_inode *dp = args->dp; |
585 | struct xfs_mount *mp = dp->i_mount; | |
586 | xfs_fileoff_t bno; /* directory offset of new block */ | |
587 | int count; /* count of filesystem blocks */ | |
588 | int error; | |
1da177e4 | 589 | |
0b1b213f CH |
590 | trace_xfs_dir2_grow_inode(args, space); |
591 | ||
1da177e4 LT |
592 | /* |
593 | * Set lowest possible block in the space requested. | |
594 | */ | |
595 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
d6cf1305 | 596 | count = args->geo->fsbcount; |
77936d02 CH |
597 | |
598 | error = xfs_da_grow_inode_int(args, &bno, count); | |
599 | if (error) | |
1da177e4 | 600 | return error; |
a7444053 | 601 | |
2998ab1d | 602 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
a7444053 | 603 | |
1da177e4 LT |
604 | /* |
605 | * Update file's size if this is the data space and it grew. | |
606 | */ | |
607 | if (space == XFS_DIR2_DATA_SPACE) { | |
608 | xfs_fsize_t size; /* directory file (data) size */ | |
609 | ||
610 | size = XFS_FSB_TO_B(mp, bno + count); | |
611 | if (size > dp->i_d.di_size) { | |
612 | dp->i_d.di_size = size; | |
77936d02 | 613 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
614 | } |
615 | } | |
616 | return 0; | |
617 | } | |
618 | ||
619 | /* | |
620 | * See if the directory is a single-block form directory. | |
621 | */ | |
f6c2d1fa | 622 | int |
1da177e4 | 623 | xfs_dir2_isblock( |
53f82db0 DC |
624 | struct xfs_da_args *args, |
625 | int *vp) /* out: 1 is block, 0 is not block */ | |
1da177e4 | 626 | { |
53f82db0 DC |
627 | xfs_fileoff_t last; /* last file offset */ |
628 | int rval; | |
1da177e4 | 629 | |
53f82db0 | 630 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
1da177e4 | 631 | return rval; |
53f82db0 DC |
632 | rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize; |
633 | ASSERT(rval == 0 || args->dp->i_d.di_size == args->geo->blksize); | |
1da177e4 LT |
634 | *vp = rval; |
635 | return 0; | |
636 | } | |
637 | ||
638 | /* | |
639 | * See if the directory is a single-leaf form directory. | |
640 | */ | |
f6c2d1fa | 641 | int |
1da177e4 | 642 | xfs_dir2_isleaf( |
53f82db0 DC |
643 | struct xfs_da_args *args, |
644 | int *vp) /* out: 1 is block, 0 is not block */ | |
1da177e4 | 645 | { |
53f82db0 DC |
646 | xfs_fileoff_t last; /* last file offset */ |
647 | int rval; | |
1da177e4 | 648 | |
53f82db0 | 649 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
1da177e4 | 650 | return rval; |
53f82db0 | 651 | *vp = last == args->geo->leafblk + args->geo->fsbcount; |
1da177e4 LT |
652 | return 0; |
653 | } | |
654 | ||
1da177e4 LT |
655 | /* |
656 | * Remove the given block from the directory. | |
657 | * This routine is used for data and free blocks, leaf/node are done | |
658 | * by xfs_da_shrink_inode. | |
659 | */ | |
660 | int | |
661 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
662 | xfs_da_args_t *args, |
663 | xfs_dir2_db_t db, | |
1d9025e5 | 664 | struct xfs_buf *bp) |
1da177e4 LT |
665 | { |
666 | xfs_fileoff_t bno; /* directory file offset */ | |
667 | xfs_dablk_t da; /* directory file offset */ | |
668 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
669 | xfs_inode_t *dp; |
670 | int error; | |
671 | xfs_mount_t *mp; | |
672 | xfs_trans_t *tp; | |
1da177e4 | 673 | |
0b1b213f CH |
674 | trace_xfs_dir2_shrink_inode(args, db); |
675 | ||
1da177e4 LT |
676 | dp = args->dp; |
677 | mp = dp->i_mount; | |
678 | tp = args->trans; | |
2998ab1d | 679 | da = xfs_dir2_db_to_da(args->geo, db); |
ab7bb610 DC |
680 | |
681 | /* Unmap the fsblock(s). */ | |
682 | error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, | |
683 | args->firstblock, args->flist, &done); | |
684 | if (error) { | |
1da177e4 | 685 | /* |
ab7bb610 DC |
686 | * ENOSPC actually can happen if we're in a removename with no |
687 | * space reservation, and the resulting block removal would | |
688 | * cause a bmap btree split or conversion from extents to btree. | |
689 | * This can only happen for un-fragmented directory blocks, | |
690 | * since you need to be punching out the middle of an extent. | |
691 | * In this case we need to leave the block in the file, and not | |
692 | * binval it. So the block has to be in a consistent empty | |
693 | * state and appropriately logged. We don't free up the buffer, | |
694 | * the caller can tell it hasn't happened since it got an error | |
695 | * back. | |
1da177e4 LT |
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 | } |