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Commit | Line | Data |
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2bd0ea18 | 1 | /* |
da23017d NS |
2 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
5000d01d | 4 | * |
da23017d 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 | |
2bd0ea18 | 7 | * published by the Free Software Foundation. |
5000d01d | 8 | * |
da23017d 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. | |
5000d01d | 13 | * |
da23017d 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 | |
2bd0ea18 | 17 | */ |
9c799827 | 18 | #include "libxfs_priv.h" |
b626fb59 DC |
19 | #include "xfs_fs.h" |
20 | #include "xfs_format.h" | |
21 | #include "xfs_log_format.h" | |
22 | #include "xfs_trans_resv.h" | |
23 | #include "xfs_mount.h" | |
f944d3d0 | 24 | #include "xfs_defer.h" |
b626fb59 DC |
25 | #include "xfs_da_format.h" |
26 | #include "xfs_da_btree.h" | |
27 | #include "xfs_inode.h" | |
28 | #include "xfs_trans.h" | |
29 | #include "xfs_bmap.h" | |
30 | #include "xfs_dir2.h" | |
31 | #include "xfs_dir2_priv.h" | |
32 | #include "xfs_trace.h" | |
2bd0ea18 | 33 | |
494434d7 DC |
34 | struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR }; |
35 | ||
aaca101b DC |
36 | /* |
37 | * @mode, if set, indicates that the type field needs to be set up. | |
38 | * This uses the transformation from file mode to DT_* as defined in linux/fs.h | |
39 | * for file type specification. This will be propagated into the directory | |
40 | * structure if appropriate for the given operation and filesystem config. | |
41 | */ | |
42 | const unsigned char xfs_mode_to_ftype[S_IFMT >> S_SHIFT] = { | |
5a35bf2c DC |
43 | [0] = XFS_DIR3_FT_UNKNOWN, |
44 | [S_IFREG >> S_SHIFT] = XFS_DIR3_FT_REG_FILE, | |
45 | [S_IFDIR >> S_SHIFT] = XFS_DIR3_FT_DIR, | |
46 | [S_IFCHR >> S_SHIFT] = XFS_DIR3_FT_CHRDEV, | |
47 | [S_IFBLK >> S_SHIFT] = XFS_DIR3_FT_BLKDEV, | |
48 | [S_IFIFO >> S_SHIFT] = XFS_DIR3_FT_FIFO, | |
49 | [S_IFSOCK >> S_SHIFT] = XFS_DIR3_FT_SOCK, | |
50 | [S_IFLNK >> S_SHIFT] = XFS_DIR3_FT_SYMLINK, | |
aaca101b | 51 | }; |
51ca7008 BN |
52 | |
53 | /* | |
5e656dbb BN |
54 | * ASCII case-insensitive (ie. A-Z) support for directories that was |
55 | * used in IRIX. | |
51ca7008 | 56 | */ |
5e656dbb | 57 | STATIC xfs_dahash_t |
51ca7008 | 58 | xfs_ascii_ci_hashname( |
5e656dbb | 59 | struct xfs_name *name) |
51ca7008 BN |
60 | { |
61 | xfs_dahash_t hash; | |
62 | int i; | |
63 | ||
5e656dbb BN |
64 | for (i = 0, hash = 0; i < name->len; i++) |
65 | hash = tolower(name->name[i]) ^ rol32(hash, 7); | |
51ca7008 BN |
66 | |
67 | return hash; | |
68 | } | |
69 | ||
5e656dbb | 70 | STATIC enum xfs_dacmp |
51ca7008 | 71 | xfs_ascii_ci_compname( |
5e656dbb | 72 | struct xfs_da_args *args, |
56b2de80 DC |
73 | const unsigned char *name, |
74 | int len) | |
51ca7008 BN |
75 | { |
76 | enum xfs_dacmp result; | |
77 | int i; | |
78 | ||
5e656dbb | 79 | if (args->namelen != len) |
51ca7008 BN |
80 | return XFS_CMP_DIFFERENT; |
81 | ||
82 | result = XFS_CMP_EXACT; | |
5e656dbb BN |
83 | for (i = 0; i < len; i++) { |
84 | if (args->name[i] == name[i]) | |
51ca7008 | 85 | continue; |
5e656dbb | 86 | if (tolower(args->name[i]) != tolower(name[i])) |
51ca7008 BN |
87 | return XFS_CMP_DIFFERENT; |
88 | result = XFS_CMP_CASE; | |
89 | } | |
90 | ||
91 | return result; | |
92 | } | |
93 | ||
5e656dbb | 94 | static struct xfs_nameops xfs_ascii_ci_nameops = { |
51ca7008 BN |
95 | .hashname = xfs_ascii_ci_hashname, |
96 | .compname = xfs_ascii_ci_compname, | |
97 | }; | |
98 | ||
ff105f75 DC |
99 | int |
100 | xfs_da_mount( | |
101 | struct xfs_mount *mp) | |
2bd0ea18 | 102 | { |
ff105f75 DC |
103 | struct xfs_da_geometry *dageo; |
104 | int nodehdr_size; | |
ed59338e DC |
105 | |
106 | ||
ff105f75 | 107 | ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT); |
2bd0ea18 NS |
108 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
109 | XFS_MAX_BLOCKSIZE); | |
ff105f75 DC |
110 | |
111 | mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); | |
112 | mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); | |
113 | ||
114 | nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; | |
115 | mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), | |
116 | KM_SLEEP | KM_MAYFAIL); | |
117 | mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), | |
118 | KM_SLEEP | KM_MAYFAIL); | |
119 | if (!mp->m_dir_geo || !mp->m_attr_geo) { | |
120 | kmem_free(mp->m_dir_geo); | |
121 | kmem_free(mp->m_attr_geo); | |
12b53197 | 122 | return -ENOMEM; |
ff105f75 DC |
123 | } |
124 | ||
125 | /* set up directory geometry */ | |
126 | dageo = mp->m_dir_geo; | |
127 | dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog; | |
128 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
129 | dageo->blksize = 1 << dageo->blklog; | |
130 | dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog; | |
131 | ||
132 | /* | |
133 | * Now we've set up the block conversion variables, we can calculate the | |
134 | * segment block constants using the geometry structure. | |
135 | */ | |
136 | dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET); | |
137 | dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET); | |
138 | dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET); | |
139 | dageo->node_ents = (dageo->blksize - nodehdr_size) / | |
ed59338e | 140 | (uint)sizeof(xfs_da_node_entry_t); |
ff105f75 DC |
141 | dageo->magicpct = (dageo->blksize * 37) / 100; |
142 | ||
143 | /* set up attribute geometry - single fsb only */ | |
144 | dageo = mp->m_attr_geo; | |
145 | dageo->blklog = mp->m_sb.sb_blocklog; | |
146 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
147 | dageo->blksize = 1 << dageo->blklog; | |
148 | dageo->fsbcount = 1; | |
149 | dageo->node_ents = (dageo->blksize - nodehdr_size) / | |
ed59338e | 150 | (uint)sizeof(xfs_da_node_entry_t); |
ff105f75 | 151 | dageo->magicpct = (dageo->blksize * 37) / 100; |
ed59338e | 152 | |
51ca7008 BN |
153 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
154 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
155 | else | |
156 | mp->m_dirnameops = &xfs_default_nameops; | |
ff105f75 DC |
157 | |
158 | return 0; | |
159 | } | |
160 | ||
161 | void | |
162 | xfs_da_unmount( | |
163 | struct xfs_mount *mp) | |
164 | { | |
165 | kmem_free(mp->m_dir_geo); | |
166 | kmem_free(mp->m_attr_geo); | |
2bd0ea18 NS |
167 | } |
168 | ||
5e656dbb BN |
169 | /* |
170 | * Return 1 if directory contains only "." and "..". | |
171 | */ | |
172 | int | |
173 | xfs_dir_isempty( | |
174 | xfs_inode_t *dp) | |
175 | { | |
a2ceac1f | 176 | xfs_dir2_sf_hdr_t *sfp; |
5e656dbb | 177 | |
e37bf53c | 178 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
5e656dbb BN |
179 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
180 | return 1; | |
181 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) | |
182 | return 0; | |
a2ceac1f DC |
183 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
184 | return !sfp->count; | |
5e656dbb BN |
185 | } |
186 | ||
187 | /* | |
188 | * Validate a given inode number. | |
189 | */ | |
190 | int | |
191 | xfs_dir_ino_validate( | |
192 | xfs_mount_t *mp, | |
193 | xfs_ino_t ino) | |
194 | { | |
195 | xfs_agblock_t agblkno; | |
196 | xfs_agino_t agino; | |
197 | xfs_agnumber_t agno; | |
198 | int ino_ok; | |
199 | int ioff; | |
200 | ||
201 | agno = XFS_INO_TO_AGNO(mp, ino); | |
202 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
203 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
204 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
205 | ino_ok = | |
206 | agno < mp->m_sb.sb_agcount && | |
207 | agblkno < mp->m_sb.sb_agblocks && | |
208 | agblkno != 0 && | |
209 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
210 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
211 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
212 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
a2ceac1f | 213 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
5e656dbb BN |
214 | (unsigned long long) ino); |
215 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
12b53197 | 216 | return -EFSCORRUPTED; |
5e656dbb BN |
217 | } |
218 | return 0; | |
219 | } | |
220 | ||
2bd0ea18 NS |
221 | /* |
222 | * Initialize a directory with its "." and ".." entries. | |
223 | */ | |
5e656dbb BN |
224 | int |
225 | xfs_dir_init( | |
226 | xfs_trans_t *tp, | |
227 | xfs_inode_t *dp, | |
228 | xfs_inode_t *pdp) | |
2bd0ea18 | 229 | { |
ff105f75 | 230 | struct xfs_da_args *args; |
5e656dbb | 231 | int error; |
2bd0ea18 | 232 | |
e37bf53c | 233 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
ff105f75 DC |
234 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
235 | if (error) | |
2bd0ea18 | 236 | return error; |
ff105f75 DC |
237 | |
238 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
239 | if (!args) | |
12b53197 | 240 | return -ENOMEM; |
ff105f75 DC |
241 | |
242 | args->geo = dp->i_mount->m_dir_geo; | |
243 | args->dp = dp; | |
244 | args->trans = tp; | |
245 | error = xfs_dir2_sf_create(args, pdp->i_ino); | |
246 | kmem_free(args); | |
247 | return error; | |
2bd0ea18 NS |
248 | } |
249 | ||
250 | /* | |
5a35bf2c DC |
251 | * Enter a name in a directory, or check for available space. |
252 | * If inum is 0, only the available space test is performed. | |
2bd0ea18 | 253 | */ |
5e656dbb BN |
254 | int |
255 | xfs_dir_createname( | |
256 | xfs_trans_t *tp, | |
257 | xfs_inode_t *dp, | |
258 | struct xfs_name *name, | |
2bd0ea18 NS |
259 | xfs_ino_t inum, /* new entry inode number */ |
260 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
261 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
262 | xfs_extlen_t total) /* bmap's total block count */ | |
263 | { | |
ff105f75 | 264 | struct xfs_da_args *args; |
5e656dbb | 265 | int rval; |
2bd0ea18 NS |
266 | int v; /* type-checking value */ |
267 | ||
e37bf53c | 268 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
5a35bf2c DC |
269 | if (inum) { |
270 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); | |
271 | if (rval) | |
272 | return rval; | |
79896434 | 273 | XFS_STATS_INC(dp->i_mount, xs_dir_create); |
5a35bf2c | 274 | } |
5e656dbb | 275 | |
ff105f75 DC |
276 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
277 | if (!args) | |
12b53197 | 278 | return -ENOMEM; |
ff105f75 DC |
279 | |
280 | args->geo = dp->i_mount->m_dir_geo; | |
281 | args->name = name->name; | |
282 | args->namelen = name->len; | |
283 | args->filetype = name->type; | |
284 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
285 | args->inumber = inum; | |
286 | args->dp = dp; | |
287 | args->firstblock = first; | |
288 | args->flist = flist; | |
289 | args->total = total; | |
290 | args->whichfork = XFS_DATA_FORK; | |
291 | args->trans = tp; | |
292 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; | |
5a35bf2c DC |
293 | if (!inum) |
294 | args->op_flags |= XFS_DA_OP_JUSTCHECK; | |
ff105f75 DC |
295 | |
296 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
297 | rval = xfs_dir2_sf_addname(args); | |
298 | goto out_free; | |
299 | } | |
300 | ||
301 | rval = xfs_dir2_isblock(args, &v); | |
302 | if (rval) | |
303 | goto out_free; | |
304 | if (v) { | |
305 | rval = xfs_dir2_block_addname(args); | |
306 | goto out_free; | |
307 | } | |
308 | ||
309 | rval = xfs_dir2_isleaf(args, &v); | |
310 | if (rval) | |
311 | goto out_free; | |
312 | if (v) | |
313 | rval = xfs_dir2_leaf_addname(args); | |
2bd0ea18 | 314 | else |
ff105f75 DC |
315 | rval = xfs_dir2_node_addname(args); |
316 | ||
317 | out_free: | |
318 | kmem_free(args); | |
2bd0ea18 NS |
319 | return rval; |
320 | } | |
321 | ||
5e656dbb BN |
322 | /* |
323 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
324 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
325 | */ | |
326 | int | |
327 | xfs_dir_cilookup_result( | |
328 | struct xfs_da_args *args, | |
56b2de80 | 329 | const unsigned char *name, |
5e656dbb BN |
330 | int len) |
331 | { | |
332 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
12b53197 | 333 | return -ENOENT; |
5e656dbb BN |
334 | if (args->cmpresult != XFS_CMP_CASE || |
335 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
12b53197 | 336 | return -EEXIST; |
5e656dbb | 337 | |
56b2de80 | 338 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
5e656dbb | 339 | if (!args->value) |
12b53197 | 340 | return -ENOMEM; |
5e656dbb BN |
341 | |
342 | memcpy(args->value, name, len); | |
343 | args->valuelen = len; | |
12b53197 | 344 | return -EEXIST; |
5e656dbb BN |
345 | } |
346 | ||
2bd0ea18 NS |
347 | /* |
348 | * Lookup a name in a directory, give back the inode number. | |
5e656dbb BN |
349 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
350 | * to name, or ci_name->name is set to NULL for an exact match. | |
2bd0ea18 | 351 | */ |
5e656dbb BN |
352 | |
353 | int | |
354 | xfs_dir_lookup( | |
355 | xfs_trans_t *tp, | |
356 | xfs_inode_t *dp, | |
357 | struct xfs_name *name, | |
358 | xfs_ino_t *inum, /* out: inode number */ | |
359 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
2bd0ea18 | 360 | { |
ff105f75 | 361 | struct xfs_da_args *args; |
5e656dbb | 362 | int rval; |
2bd0ea18 | 363 | int v; /* type-checking value */ |
7ebb7646 | 364 | int lock_mode; |
2bd0ea18 | 365 | |
e37bf53c | 366 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
79896434 | 367 | XFS_STATS_INC(dp->i_mount, xs_dir_lookup); |
a95cf252 | 368 | |
ff105f75 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); | |
378 | args->geo = dp->i_mount->m_dir_geo; | |
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; | |
5e656dbb | 387 | if (ci_name) |
ff105f75 | 388 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
5e656dbb | 389 | |
7ebb7646 | 390 | lock_mode = xfs_ilock_data_map_shared(dp); |
ff105f75 DC |
391 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
392 | rval = xfs_dir2_sf_lookup(args); | |
393 | goto out_check_rval; | |
394 | } | |
395 | ||
396 | rval = xfs_dir2_isblock(args, &v); | |
397 | if (rval) | |
398 | goto out_free; | |
399 | if (v) { | |
400 | rval = xfs_dir2_block_lookup(args); | |
401 | goto out_check_rval; | |
402 | } | |
403 | ||
404 | rval = xfs_dir2_isleaf(args, &v); | |
405 | if (rval) | |
406 | goto out_free; | |
407 | if (v) | |
408 | rval = xfs_dir2_leaf_lookup(args); | |
2bd0ea18 | 409 | else |
ff105f75 DC |
410 | rval = xfs_dir2_node_lookup(args); |
411 | ||
412 | out_check_rval: | |
12b53197 | 413 | if (rval == -EEXIST) |
2bd0ea18 | 414 | rval = 0; |
5e656dbb | 415 | if (!rval) { |
ff105f75 | 416 | *inum = args->inumber; |
5e656dbb | 417 | if (ci_name) { |
ff105f75 DC |
418 | ci_name->name = args->value; |
419 | ci_name->len = args->valuelen; | |
5e656dbb BN |
420 | } |
421 | } | |
ff105f75 | 422 | out_free: |
7ebb7646 | 423 | xfs_iunlock(dp, lock_mode); |
ff105f75 | 424 | kmem_free(args); |
2bd0ea18 NS |
425 | return rval; |
426 | } | |
427 | ||
428 | /* | |
429 | * Remove an entry from a directory. | |
430 | */ | |
5e656dbb BN |
431 | int |
432 | xfs_dir_removename( | |
433 | xfs_trans_t *tp, | |
434 | xfs_inode_t *dp, | |
435 | struct xfs_name *name, | |
436 | xfs_ino_t ino, | |
2bd0ea18 | 437 | xfs_fsblock_t *first, /* bmap's firstblock */ |
dfc130f3 | 438 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ |
2bd0ea18 NS |
439 | xfs_extlen_t total) /* bmap's total block count */ |
440 | { | |
ff105f75 | 441 | struct xfs_da_args *args; |
5e656dbb | 442 | int rval; |
2bd0ea18 NS |
443 | int v; /* type-checking value */ |
444 | ||
e37bf53c | 445 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
79896434 | 446 | XFS_STATS_INC(dp->i_mount, xs_dir_remove); |
5e656dbb | 447 | |
ff105f75 DC |
448 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
449 | if (!args) | |
12b53197 | 450 | return -ENOMEM; |
ff105f75 DC |
451 | |
452 | args->geo = dp->i_mount->m_dir_geo; | |
453 | args->name = name->name; | |
454 | args->namelen = name->len; | |
455 | args->filetype = name->type; | |
456 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
457 | args->inumber = ino; | |
458 | args->dp = dp; | |
459 | args->firstblock = first; | |
460 | args->flist = flist; | |
461 | args->total = total; | |
462 | args->whichfork = XFS_DATA_FORK; | |
463 | args->trans = tp; | |
464 | ||
465 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
466 | rval = xfs_dir2_sf_removename(args); | |
467 | goto out_free; | |
468 | } | |
469 | ||
470 | rval = xfs_dir2_isblock(args, &v); | |
471 | if (rval) | |
472 | goto out_free; | |
473 | if (v) { | |
474 | rval = xfs_dir2_block_removename(args); | |
475 | goto out_free; | |
476 | } | |
477 | ||
478 | rval = xfs_dir2_isleaf(args, &v); | |
479 | if (rval) | |
480 | goto out_free; | |
481 | if (v) | |
482 | rval = xfs_dir2_leaf_removename(args); | |
2bd0ea18 | 483 | else |
ff105f75 DC |
484 | rval = xfs_dir2_node_removename(args); |
485 | out_free: | |
486 | kmem_free(args); | |
2bd0ea18 NS |
487 | return rval; |
488 | } | |
489 | ||
490 | /* | |
491 | * Replace the inode number of a directory entry. | |
492 | */ | |
5e656dbb BN |
493 | int |
494 | xfs_dir_replace( | |
495 | xfs_trans_t *tp, | |
496 | xfs_inode_t *dp, | |
497 | struct xfs_name *name, /* name of entry to replace */ | |
2bd0ea18 NS |
498 | xfs_ino_t inum, /* new inode number */ |
499 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
dfc130f3 | 500 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ |
2bd0ea18 NS |
501 | xfs_extlen_t total) /* bmap's total block count */ |
502 | { | |
ff105f75 | 503 | struct xfs_da_args *args; |
5e656dbb | 504 | int rval; |
2bd0ea18 NS |
505 | int v; /* type-checking value */ |
506 | ||
e37bf53c | 507 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
a95cf252 | 508 | |
ff105f75 DC |
509 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
510 | if (rval) | |
2bd0ea18 | 511 | return rval; |
5e656dbb | 512 | |
ff105f75 DC |
513 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
514 | if (!args) | |
12b53197 | 515 | return -ENOMEM; |
ff105f75 DC |
516 | |
517 | args->geo = dp->i_mount->m_dir_geo; | |
518 | args->name = name->name; | |
519 | args->namelen = name->len; | |
520 | args->filetype = name->type; | |
521 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
522 | args->inumber = inum; | |
523 | args->dp = dp; | |
524 | args->firstblock = first; | |
525 | args->flist = flist; | |
526 | args->total = total; | |
527 | args->whichfork = XFS_DATA_FORK; | |
528 | args->trans = tp; | |
529 | ||
530 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
531 | rval = xfs_dir2_sf_replace(args); | |
532 | goto out_free; | |
533 | } | |
534 | ||
535 | rval = xfs_dir2_isblock(args, &v); | |
536 | if (rval) | |
537 | goto out_free; | |
538 | if (v) { | |
539 | rval = xfs_dir2_block_replace(args); | |
540 | goto out_free; | |
541 | } | |
542 | ||
543 | rval = xfs_dir2_isleaf(args, &v); | |
544 | if (rval) | |
545 | goto out_free; | |
546 | if (v) | |
547 | rval = xfs_dir2_leaf_replace(args); | |
2bd0ea18 | 548 | else |
ff105f75 DC |
549 | rval = xfs_dir2_node_replace(args); |
550 | out_free: | |
551 | kmem_free(args); | |
2bd0ea18 NS |
552 | return rval; |
553 | } | |
554 | ||
4a34b33d DC |
555 | /* |
556 | * See if this entry can be added to the directory without allocating space. | |
4a34b33d DC |
557 | */ |
558 | int | |
559 | xfs_dir_canenter( | |
560 | xfs_trans_t *tp, | |
561 | xfs_inode_t *dp, | |
5a35bf2c | 562 | struct xfs_name *name) /* name of entry to add */ |
4a34b33d | 563 | { |
5a35bf2c | 564 | return xfs_dir_createname(tp, dp, name, 0, NULL, NULL, 0); |
4a34b33d DC |
565 | } |
566 | ||
2bd0ea18 NS |
567 | /* |
568 | * Utility routines. | |
569 | */ | |
570 | ||
571 | /* | |
572 | * Add a block to the directory. | |
a2ceac1f DC |
573 | * |
574 | * This routine is for data and free blocks, not leaf/node blocks which are | |
575 | * handled by xfs_da_grow_inode. | |
2bd0ea18 | 576 | */ |
5e656dbb | 577 | int |
2bd0ea18 | 578 | xfs_dir2_grow_inode( |
a2ceac1f DC |
579 | struct xfs_da_args *args, |
580 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
581 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
2bd0ea18 | 582 | { |
a2ceac1f DC |
583 | struct xfs_inode *dp = args->dp; |
584 | struct xfs_mount *mp = dp->i_mount; | |
585 | xfs_fileoff_t bno; /* directory offset of new block */ | |
586 | int count; /* count of filesystem blocks */ | |
587 | int error; | |
56b2de80 DC |
588 | |
589 | trace_xfs_dir2_grow_inode(args, space); | |
2bd0ea18 | 590 | |
2bd0ea18 NS |
591 | /* |
592 | * Set lowest possible block in the space requested. | |
593 | */ | |
594 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
ff105f75 | 595 | count = args->geo->fsbcount; |
2bd0ea18 | 596 | |
a2ceac1f DC |
597 | error = xfs_da_grow_inode_int(args, &bno, count); |
598 | if (error) | |
599 | return error; | |
56b2de80 | 600 | |
ff105f75 | 601 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
56b2de80 | 602 | |
2bd0ea18 NS |
603 | /* |
604 | * Update file's size if this is the data space and it grew. | |
605 | */ | |
606 | if (space == XFS_DIR2_DATA_SPACE) { | |
607 | xfs_fsize_t size; /* directory file (data) size */ | |
608 | ||
609 | size = XFS_FSB_TO_B(mp, bno + count); | |
610 | if (size > dp->i_d.di_size) { | |
611 | dp->i_d.di_size = size; | |
a2ceac1f | 612 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
2bd0ea18 NS |
613 | } |
614 | } | |
615 | return 0; | |
616 | } | |
617 | ||
618 | /* | |
619 | * See if the directory is a single-block form directory. | |
620 | */ | |
5e656dbb | 621 | int |
2bd0ea18 | 622 | xfs_dir2_isblock( |
ff105f75 DC |
623 | struct xfs_da_args *args, |
624 | int *vp) /* out: 1 is block, 0 is not block */ | |
2bd0ea18 | 625 | { |
ff105f75 DC |
626 | xfs_fileoff_t last; /* last file offset */ |
627 | int rval; | |
2bd0ea18 | 628 | |
ff105f75 | 629 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
2bd0ea18 | 630 | return rval; |
ff105f75 DC |
631 | rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize; |
632 | ASSERT(rval == 0 || args->dp->i_d.di_size == args->geo->blksize); | |
2bd0ea18 NS |
633 | *vp = rval; |
634 | return 0; | |
635 | } | |
636 | ||
637 | /* | |
638 | * See if the directory is a single-leaf form directory. | |
639 | */ | |
5e656dbb | 640 | int |
2bd0ea18 | 641 | xfs_dir2_isleaf( |
ff105f75 DC |
642 | struct xfs_da_args *args, |
643 | int *vp) /* out: 1 is block, 0 is not block */ | |
2bd0ea18 | 644 | { |
ff105f75 DC |
645 | xfs_fileoff_t last; /* last file offset */ |
646 | int rval; | |
2bd0ea18 | 647 | |
ff105f75 | 648 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
2bd0ea18 | 649 | return rval; |
ff105f75 | 650 | *vp = last == args->geo->leafblk + args->geo->fsbcount; |
2bd0ea18 NS |
651 | return 0; |
652 | } | |
653 | ||
654 | /* | |
655 | * Remove the given block from the directory. | |
656 | * This routine is used for data and free blocks, leaf/node are done | |
657 | * by xfs_da_shrink_inode. | |
658 | */ | |
659 | int | |
660 | xfs_dir2_shrink_inode( | |
5e656dbb BN |
661 | xfs_da_args_t *args, |
662 | xfs_dir2_db_t db, | |
a2ceac1f | 663 | struct xfs_buf *bp) |
2bd0ea18 NS |
664 | { |
665 | xfs_fileoff_t bno; /* directory file offset */ | |
666 | xfs_dablk_t da; /* directory file offset */ | |
667 | int done; /* bunmap is finished */ | |
5e656dbb BN |
668 | xfs_inode_t *dp; |
669 | int error; | |
670 | xfs_mount_t *mp; | |
671 | xfs_trans_t *tp; | |
2bd0ea18 | 672 | |
56b2de80 DC |
673 | trace_xfs_dir2_shrink_inode(args, db); |
674 | ||
2bd0ea18 NS |
675 | dp = args->dp; |
676 | mp = dp->i_mount; | |
677 | tp = args->trans; | |
ff105f75 | 678 | da = xfs_dir2_db_to_da(args->geo, db); |
db9cba4e DC |
679 | |
680 | /* Unmap the fsblock(s). */ | |
681 | error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, | |
682 | args->firstblock, args->flist, &done); | |
683 | if (error) { | |
2bd0ea18 | 684 | /* |
db9cba4e DC |
685 | * ENOSPC actually can happen if we're in a removename with no |
686 | * space reservation, and the resulting block removal would | |
687 | * cause a bmap btree split or conversion from extents to btree. | |
688 | * This can only happen for un-fragmented directory blocks, | |
689 | * since you need to be punching out the middle of an extent. | |
690 | * In this case we need to leave the block in the file, and not | |
691 | * binval it. So the block has to be in a consistent empty | |
692 | * state and appropriately logged. We don't free up the buffer, | |
693 | * the caller can tell it hasn't happened since it got an error | |
694 | * back. | |
2bd0ea18 NS |
695 | */ |
696 | return error; | |
697 | } | |
698 | ASSERT(done); | |
699 | /* | |
700 | * Invalidate the buffer from the transaction. | |
701 | */ | |
a2ceac1f | 702 | xfs_trans_binval(tp, bp); |
2bd0ea18 NS |
703 | /* |
704 | * If it's not a data block, we're done. | |
705 | */ | |
ff105f75 | 706 | if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) |
2bd0ea18 NS |
707 | return 0; |
708 | /* | |
709 | * If the block isn't the last one in the directory, we're done. | |
710 | */ | |
ff105f75 | 711 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) |
2bd0ea18 NS |
712 | return 0; |
713 | bno = da; | |
0e266570 | 714 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { |
2bd0ea18 NS |
715 | /* |
716 | * This can't really happen unless there's kernel corruption. | |
717 | */ | |
718 | return error; | |
719 | } | |
ff105f75 | 720 | if (db == args->geo->datablk) |
2bd0ea18 NS |
721 | ASSERT(bno == 0); |
722 | else | |
723 | ASSERT(bno > 0); | |
724 | /* | |
725 | * Set the size to the new last block. | |
726 | */ | |
727 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
728 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
729 | return 0; | |
730 | } |