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 | ||
5d074a4f | 96 | ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT); |
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); | |
2451337d | 111 | return -ENOMEM; |
0650b554 DC |
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 | return 0; |
148 | } | |
149 | ||
150 | void | |
151 | xfs_da_unmount( | |
152 | struct xfs_mount *mp) | |
153 | { | |
154 | kmem_free(mp->m_dir_geo); | |
155 | kmem_free(mp->m_attr_geo); | |
1da177e4 LT |
156 | } |
157 | ||
158 | /* | |
159 | * Return 1 if directory contains only "." and "..". | |
160 | */ | |
f6c2d1fa NS |
161 | int |
162 | xfs_dir_isempty( | |
163 | xfs_inode_t *dp) | |
1da177e4 | 164 | { |
ac8ba50f | 165 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 166 | |
abbede1b | 167 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 168 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 169 | return 1; |
1da177e4 LT |
170 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
171 | return 0; | |
ac8ba50f CH |
172 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
173 | return !sfp->count; | |
1da177e4 LT |
174 | } |
175 | ||
f6c2d1fa NS |
176 | /* |
177 | * Validate a given inode number. | |
178 | */ | |
179 | int | |
180 | xfs_dir_ino_validate( | |
181 | xfs_mount_t *mp, | |
182 | xfs_ino_t ino) | |
183 | { | |
184 | xfs_agblock_t agblkno; | |
185 | xfs_agino_t agino; | |
186 | xfs_agnumber_t agno; | |
187 | int ino_ok; | |
188 | int ioff; | |
189 | ||
190 | agno = XFS_INO_TO_AGNO(mp, ino); | |
191 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
192 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
193 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
194 | ino_ok = | |
195 | agno < mp->m_sb.sb_agcount && | |
196 | agblkno < mp->m_sb.sb_agblocks && | |
197 | agblkno != 0 && | |
198 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
199 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
200 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
201 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 202 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
203 | (unsigned long long) ino); |
204 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 205 | return -EFSCORRUPTED; |
f6c2d1fa NS |
206 | } |
207 | return 0; | |
208 | } | |
209 | ||
1da177e4 LT |
210 | /* |
211 | * Initialize a directory with its "." and ".." entries. | |
212 | */ | |
f6c2d1fa NS |
213 | int |
214 | xfs_dir_init( | |
215 | xfs_trans_t *tp, | |
216 | xfs_inode_t *dp, | |
217 | xfs_inode_t *pdp) | |
1da177e4 | 218 | { |
a1358aa3 | 219 | struct xfs_da_args *args; |
f6c2d1fa | 220 | int error; |
1da177e4 | 221 | |
abbede1b | 222 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
223 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
224 | if (error) | |
1da177e4 | 225 | return error; |
a1358aa3 DC |
226 | |
227 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
228 | if (!args) | |
2451337d | 229 | return -ENOMEM; |
a1358aa3 | 230 | |
0650b554 | 231 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
232 | args->dp = dp; |
233 | args->trans = tp; | |
234 | error = xfs_dir2_sf_create(args, pdp->i_ino); | |
235 | kmem_free(args); | |
236 | return error; | |
1da177e4 LT |
237 | } |
238 | ||
239 | /* | |
240 | Enter a name in a directory. | |
241 | */ | |
f6c2d1fa NS |
242 | int |
243 | xfs_dir_createname( | |
244 | xfs_trans_t *tp, | |
245 | xfs_inode_t *dp, | |
556b8b16 | 246 | struct xfs_name *name, |
1da177e4 LT |
247 | xfs_ino_t inum, /* new entry inode number */ |
248 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
249 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
250 | xfs_extlen_t total) /* bmap's total block count */ | |
251 | { | |
a1358aa3 | 252 | struct xfs_da_args *args; |
f6c2d1fa | 253 | int rval; |
1da177e4 LT |
254 | int v; /* type-checking value */ |
255 | ||
abbede1b | 256 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
a1358aa3 DC |
257 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
258 | if (rval) | |
1da177e4 | 259 | return rval; |
1da177e4 | 260 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 261 | |
a1358aa3 DC |
262 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
263 | if (!args) | |
2451337d | 264 | return -ENOMEM; |
a1358aa3 | 265 | |
0650b554 | 266 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
267 | args->name = name->name; |
268 | args->namelen = name->len; | |
269 | args->filetype = name->type; | |
270 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
271 | args->inumber = inum; | |
272 | args->dp = dp; | |
273 | args->firstblock = first; | |
274 | args->flist = flist; | |
275 | args->total = total; | |
276 | args->whichfork = XFS_DATA_FORK; | |
277 | args->trans = tp; | |
278 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; | |
279 | ||
280 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
281 | rval = xfs_dir2_sf_addname(args); | |
282 | goto out_free; | |
283 | } | |
284 | ||
53f82db0 | 285 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
286 | if (rval) |
287 | goto out_free; | |
288 | if (v) { | |
289 | rval = xfs_dir2_block_addname(args); | |
290 | goto out_free; | |
291 | } | |
292 | ||
53f82db0 | 293 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
294 | if (rval) |
295 | goto out_free; | |
296 | if (v) | |
297 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 298 | else |
a1358aa3 DC |
299 | rval = xfs_dir2_node_addname(args); |
300 | ||
301 | out_free: | |
302 | kmem_free(args); | |
1da177e4 LT |
303 | return rval; |
304 | } | |
305 | ||
384f3ced BN |
306 | /* |
307 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
308 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
309 | */ | |
310 | int | |
311 | xfs_dir_cilookup_result( | |
312 | struct xfs_da_args *args, | |
a3380ae3 | 313 | const unsigned char *name, |
384f3ced BN |
314 | int len) |
315 | { | |
316 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
2451337d | 317 | return -ENOENT; |
384f3ced BN |
318 | if (args->cmpresult != XFS_CMP_CASE || |
319 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
2451337d | 320 | return -EEXIST; |
384f3ced | 321 | |
3f52c2f0 | 322 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced | 323 | if (!args->value) |
2451337d | 324 | return -ENOMEM; |
384f3ced BN |
325 | |
326 | memcpy(args->value, name, len); | |
327 | args->valuelen = len; | |
2451337d | 328 | return -EEXIST; |
384f3ced BN |
329 | } |
330 | ||
1da177e4 LT |
331 | /* |
332 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
333 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
334 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 335 | */ |
384f3ced | 336 | |
f6c2d1fa NS |
337 | int |
338 | xfs_dir_lookup( | |
339 | xfs_trans_t *tp, | |
340 | xfs_inode_t *dp, | |
556b8b16 | 341 | struct xfs_name *name, |
384f3ced BN |
342 | xfs_ino_t *inum, /* out: inode number */ |
343 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 344 | { |
a1358aa3 | 345 | struct xfs_da_args *args; |
f6c2d1fa | 346 | int rval; |
1da177e4 LT |
347 | int v; /* type-checking value */ |
348 | ||
abbede1b | 349 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
350 | XFS_STATS_INC(xs_dir_lookup); |
351 | ||
a1358aa3 DC |
352 | /* |
353 | * We need to use KM_NOFS here so that lockdep will not throw false | |
354 | * positive deadlock warnings on a non-transactional lookup path. It is | |
355 | * safe to recurse into inode recalim in that case, but lockdep can't | |
356 | * easily be taught about it. Hence KM_NOFS avoids having to add more | |
357 | * lockdep Doing this avoids having to add a bunch of lockdep class | |
358 | * annotations into the reclaim path for the ilock. | |
359 | */ | |
360 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
0650b554 | 361 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
362 | args->name = name->name; |
363 | args->namelen = name->len; | |
364 | args->filetype = name->type; | |
365 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
366 | args->dp = dp; | |
367 | args->whichfork = XFS_DATA_FORK; | |
368 | args->trans = tp; | |
369 | args->op_flags = XFS_DA_OP_OKNOENT; | |
384f3ced | 370 | if (ci_name) |
a1358aa3 | 371 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
f6c2d1fa | 372 | |
a1358aa3 DC |
373 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
374 | rval = xfs_dir2_sf_lookup(args); | |
375 | goto out_check_rval; | |
376 | } | |
377 | ||
53f82db0 | 378 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
379 | if (rval) |
380 | goto out_free; | |
381 | if (v) { | |
382 | rval = xfs_dir2_block_lookup(args); | |
383 | goto out_check_rval; | |
384 | } | |
385 | ||
53f82db0 | 386 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
387 | if (rval) |
388 | goto out_free; | |
389 | if (v) | |
390 | rval = xfs_dir2_leaf_lookup(args); | |
1da177e4 | 391 | else |
a1358aa3 DC |
392 | rval = xfs_dir2_node_lookup(args); |
393 | ||
394 | out_check_rval: | |
2451337d | 395 | if (rval == -EEXIST) |
1da177e4 | 396 | rval = 0; |
384f3ced | 397 | if (!rval) { |
a1358aa3 | 398 | *inum = args->inumber; |
384f3ced | 399 | if (ci_name) { |
a1358aa3 DC |
400 | ci_name->name = args->value; |
401 | ci_name->len = args->valuelen; | |
384f3ced BN |
402 | } |
403 | } | |
a1358aa3 DC |
404 | out_free: |
405 | kmem_free(args); | |
1da177e4 LT |
406 | return rval; |
407 | } | |
408 | ||
409 | /* | |
410 | * Remove an entry from a directory. | |
411 | */ | |
f6c2d1fa NS |
412 | int |
413 | xfs_dir_removename( | |
414 | xfs_trans_t *tp, | |
415 | xfs_inode_t *dp, | |
556b8b16 | 416 | struct xfs_name *name, |
f6c2d1fa | 417 | xfs_ino_t ino, |
1da177e4 LT |
418 | xfs_fsblock_t *first, /* bmap's firstblock */ |
419 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
420 | xfs_extlen_t total) /* bmap's total block count */ | |
421 | { | |
a1358aa3 | 422 | struct xfs_da_args *args; |
f6c2d1fa | 423 | int rval; |
1da177e4 LT |
424 | int v; /* type-checking value */ |
425 | ||
abbede1b | 426 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 427 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 428 | |
a1358aa3 DC |
429 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
430 | if (!args) | |
2451337d | 431 | return -ENOMEM; |
a1358aa3 | 432 | |
0650b554 | 433 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
434 | args->name = name->name; |
435 | args->namelen = name->len; | |
436 | args->filetype = name->type; | |
437 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
438 | args->inumber = ino; | |
439 | args->dp = dp; | |
440 | args->firstblock = first; | |
441 | args->flist = flist; | |
442 | args->total = total; | |
443 | args->whichfork = XFS_DATA_FORK; | |
444 | args->trans = tp; | |
445 | ||
446 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
447 | rval = xfs_dir2_sf_removename(args); | |
448 | goto out_free; | |
449 | } | |
450 | ||
53f82db0 | 451 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
452 | if (rval) |
453 | goto out_free; | |
454 | if (v) { | |
455 | rval = xfs_dir2_block_removename(args); | |
456 | goto out_free; | |
457 | } | |
458 | ||
53f82db0 | 459 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
460 | if (rval) |
461 | goto out_free; | |
462 | if (v) | |
463 | rval = xfs_dir2_leaf_removename(args); | |
1da177e4 | 464 | else |
a1358aa3 DC |
465 | rval = xfs_dir2_node_removename(args); |
466 | out_free: | |
467 | kmem_free(args); | |
1da177e4 LT |
468 | return rval; |
469 | } | |
470 | ||
1da177e4 LT |
471 | /* |
472 | * Replace the inode number of a directory entry. | |
473 | */ | |
f6c2d1fa NS |
474 | int |
475 | xfs_dir_replace( | |
476 | xfs_trans_t *tp, | |
477 | xfs_inode_t *dp, | |
556b8b16 | 478 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
479 | xfs_ino_t inum, /* new inode number */ |
480 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
481 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
482 | xfs_extlen_t total) /* bmap's total block count */ | |
483 | { | |
a1358aa3 | 484 | struct xfs_da_args *args; |
f6c2d1fa | 485 | int rval; |
1da177e4 LT |
486 | int v; /* type-checking value */ |
487 | ||
abbede1b | 488 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 489 | |
a1358aa3 DC |
490 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
491 | if (rval) | |
1da177e4 | 492 | return rval; |
f6c2d1fa | 493 | |
a1358aa3 DC |
494 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
495 | if (!args) | |
2451337d | 496 | return -ENOMEM; |
a1358aa3 | 497 | |
0650b554 | 498 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
499 | args->name = name->name; |
500 | args->namelen = name->len; | |
501 | args->filetype = name->type; | |
502 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
503 | args->inumber = inum; | |
504 | args->dp = dp; | |
505 | args->firstblock = first; | |
506 | args->flist = flist; | |
507 | args->total = total; | |
508 | args->whichfork = XFS_DATA_FORK; | |
509 | args->trans = tp; | |
510 | ||
511 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
512 | rval = xfs_dir2_sf_replace(args); | |
513 | goto out_free; | |
514 | } | |
515 | ||
53f82db0 | 516 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
517 | if (rval) |
518 | goto out_free; | |
519 | if (v) { | |
520 | rval = xfs_dir2_block_replace(args); | |
521 | goto out_free; | |
522 | } | |
523 | ||
53f82db0 | 524 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
525 | if (rval) |
526 | goto out_free; | |
527 | if (v) | |
528 | rval = xfs_dir2_leaf_replace(args); | |
1da177e4 | 529 | else |
a1358aa3 DC |
530 | rval = xfs_dir2_node_replace(args); |
531 | out_free: | |
532 | kmem_free(args); | |
1da177e4 LT |
533 | return rval; |
534 | } | |
535 | ||
536 | /* | |
537 | * See if this entry can be added to the directory without allocating space. | |
538 | */ | |
f6c2d1fa NS |
539 | int |
540 | xfs_dir_canenter( | |
541 | xfs_trans_t *tp, | |
542 | xfs_inode_t *dp, | |
94f3cad5 | 543 | struct xfs_name *name) /* name of entry to add */ |
1da177e4 | 544 | { |
a1358aa3 | 545 | struct xfs_da_args *args; |
f6c2d1fa | 546 | int rval; |
1da177e4 LT |
547 | int v; /* type-checking value */ |
548 | ||
abbede1b | 549 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 550 | |
a1358aa3 DC |
551 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
552 | if (!args) | |
2451337d | 553 | return -ENOMEM; |
a1358aa3 | 554 | |
0650b554 | 555 | args->geo = dp->i_mount->m_dir_geo; |
a1358aa3 DC |
556 | args->name = name->name; |
557 | args->namelen = name->len; | |
558 | args->filetype = name->type; | |
559 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
560 | args->dp = dp; | |
561 | args->whichfork = XFS_DATA_FORK; | |
562 | args->trans = tp; | |
563 | args->op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME | | |
6a178100 | 564 | XFS_DA_OP_OKNOENT; |
f6c2d1fa | 565 | |
a1358aa3 DC |
566 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
567 | rval = xfs_dir2_sf_addname(args); | |
568 | goto out_free; | |
569 | } | |
570 | ||
53f82db0 | 571 | rval = xfs_dir2_isblock(args, &v); |
a1358aa3 DC |
572 | if (rval) |
573 | goto out_free; | |
574 | if (v) { | |
575 | rval = xfs_dir2_block_addname(args); | |
576 | goto out_free; | |
577 | } | |
578 | ||
53f82db0 | 579 | rval = xfs_dir2_isleaf(args, &v); |
a1358aa3 DC |
580 | if (rval) |
581 | goto out_free; | |
582 | if (v) | |
583 | rval = xfs_dir2_leaf_addname(args); | |
1da177e4 | 584 | else |
a1358aa3 DC |
585 | rval = xfs_dir2_node_addname(args); |
586 | out_free: | |
587 | kmem_free(args); | |
1da177e4 LT |
588 | return rval; |
589 | } | |
590 | ||
1da177e4 LT |
591 | /* |
592 | * Utility routines. | |
593 | */ | |
594 | ||
595 | /* | |
596 | * Add a block to the directory. | |
77936d02 CH |
597 | * |
598 | * This routine is for data and free blocks, not leaf/node blocks which are | |
599 | * handled by xfs_da_grow_inode. | |
1da177e4 | 600 | */ |
f6c2d1fa | 601 | int |
1da177e4 | 602 | xfs_dir2_grow_inode( |
77936d02 CH |
603 | struct xfs_da_args *args, |
604 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
605 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 606 | { |
77936d02 CH |
607 | struct xfs_inode *dp = args->dp; |
608 | struct xfs_mount *mp = dp->i_mount; | |
609 | xfs_fileoff_t bno; /* directory offset of new block */ | |
610 | int count; /* count of filesystem blocks */ | |
611 | int error; | |
1da177e4 | 612 | |
0b1b213f CH |
613 | trace_xfs_dir2_grow_inode(args, space); |
614 | ||
1da177e4 LT |
615 | /* |
616 | * Set lowest possible block in the space requested. | |
617 | */ | |
618 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
d6cf1305 | 619 | count = args->geo->fsbcount; |
77936d02 CH |
620 | |
621 | error = xfs_da_grow_inode_int(args, &bno, count); | |
622 | if (error) | |
1da177e4 | 623 | return error; |
a7444053 | 624 | |
2998ab1d | 625 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
a7444053 | 626 | |
1da177e4 LT |
627 | /* |
628 | * Update file's size if this is the data space and it grew. | |
629 | */ | |
630 | if (space == XFS_DIR2_DATA_SPACE) { | |
631 | xfs_fsize_t size; /* directory file (data) size */ | |
632 | ||
633 | size = XFS_FSB_TO_B(mp, bno + count); | |
634 | if (size > dp->i_d.di_size) { | |
635 | dp->i_d.di_size = size; | |
77936d02 | 636 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
637 | } |
638 | } | |
639 | return 0; | |
640 | } | |
641 | ||
642 | /* | |
643 | * See if the directory is a single-block form directory. | |
644 | */ | |
f6c2d1fa | 645 | int |
1da177e4 | 646 | xfs_dir2_isblock( |
53f82db0 DC |
647 | struct xfs_da_args *args, |
648 | int *vp) /* out: 1 is block, 0 is not block */ | |
1da177e4 | 649 | { |
53f82db0 DC |
650 | xfs_fileoff_t last; /* last file offset */ |
651 | int rval; | |
1da177e4 | 652 | |
53f82db0 | 653 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
1da177e4 | 654 | return rval; |
53f82db0 DC |
655 | rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize; |
656 | ASSERT(rval == 0 || args->dp->i_d.di_size == args->geo->blksize); | |
1da177e4 LT |
657 | *vp = rval; |
658 | return 0; | |
659 | } | |
660 | ||
661 | /* | |
662 | * See if the directory is a single-leaf form directory. | |
663 | */ | |
f6c2d1fa | 664 | int |
1da177e4 | 665 | xfs_dir2_isleaf( |
53f82db0 DC |
666 | struct xfs_da_args *args, |
667 | int *vp) /* out: 1 is block, 0 is not block */ | |
1da177e4 | 668 | { |
53f82db0 DC |
669 | xfs_fileoff_t last; /* last file offset */ |
670 | int rval; | |
1da177e4 | 671 | |
53f82db0 | 672 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
1da177e4 | 673 | return rval; |
53f82db0 | 674 | *vp = last == args->geo->leafblk + args->geo->fsbcount; |
1da177e4 LT |
675 | return 0; |
676 | } | |
677 | ||
1da177e4 LT |
678 | /* |
679 | * Remove the given block from the directory. | |
680 | * This routine is used for data and free blocks, leaf/node are done | |
681 | * by xfs_da_shrink_inode. | |
682 | */ | |
683 | int | |
684 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
685 | xfs_da_args_t *args, |
686 | xfs_dir2_db_t db, | |
1d9025e5 | 687 | struct xfs_buf *bp) |
1da177e4 LT |
688 | { |
689 | xfs_fileoff_t bno; /* directory file offset */ | |
690 | xfs_dablk_t da; /* directory file offset */ | |
691 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
692 | xfs_inode_t *dp; |
693 | int error; | |
694 | xfs_mount_t *mp; | |
695 | xfs_trans_t *tp; | |
1da177e4 | 696 | |
0b1b213f CH |
697 | trace_xfs_dir2_shrink_inode(args, db); |
698 | ||
1da177e4 LT |
699 | dp = args->dp; |
700 | mp = dp->i_mount; | |
701 | tp = args->trans; | |
2998ab1d | 702 | da = xfs_dir2_db_to_da(args->geo, db); |
1da177e4 LT |
703 | /* |
704 | * Unmap the fsblock(s). | |
705 | */ | |
d6cf1305 | 706 | if ((error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, |
1da177e4 | 707 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, |
b4e9181e | 708 | &done))) { |
1da177e4 LT |
709 | /* |
710 | * ENOSPC actually can happen if we're in a removename with | |
711 | * no space reservation, and the resulting block removal | |
712 | * would cause a bmap btree split or conversion from extents | |
713 | * to btree. This can only happen for un-fragmented | |
714 | * directory blocks, since you need to be punching out | |
715 | * the middle of an extent. | |
716 | * In this case we need to leave the block in the file, | |
717 | * and not binval it. | |
718 | * So the block has to be in a consistent empty state | |
719 | * and appropriately logged. | |
720 | * We don't free up the buffer, the caller can tell it | |
721 | * hasn't happened since it got an error back. | |
722 | */ | |
723 | return error; | |
724 | } | |
725 | ASSERT(done); | |
726 | /* | |
727 | * Invalidate the buffer from the transaction. | |
728 | */ | |
1d9025e5 | 729 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
730 | /* |
731 | * If it's not a data block, we're done. | |
732 | */ | |
30028030 | 733 | if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) |
1da177e4 LT |
734 | return 0; |
735 | /* | |
736 | * If the block isn't the last one in the directory, we're done. | |
737 | */ | |
9b3b5522 | 738 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) |
1da177e4 LT |
739 | return 0; |
740 | bno = da; | |
741 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
742 | /* | |
743 | * This can't really happen unless there's kernel corruption. | |
744 | */ | |
745 | return error; | |
746 | } | |
7dda6e86 | 747 | if (db == args->geo->datablk) |
1da177e4 LT |
748 | ASSERT(bno == 0); |
749 | else | |
750 | ASSERT(bno > 0); | |
751 | /* | |
752 | * Set the size to the new last block. | |
753 | */ | |
754 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
755 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
756 | return 0; | |
757 | } |