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 | ||
f6c2d1fa NS |
88 | void |
89 | xfs_dir_mount( | |
90 | xfs_mount_t *mp) | |
1da177e4 | 91 | { |
37804376 DC |
92 | int nodehdr_size; |
93 | ||
94 | ||
62118709 | 95 | ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb)); |
1da177e4 LT |
96 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
97 | XFS_MAX_BLOCKSIZE); | |
4bceb18f DC |
98 | |
99 | mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); | |
100 | mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); | |
101 | ||
1da177e4 LT |
102 | mp->m_dirblksize = 1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog); |
103 | mp->m_dirblkfsbs = 1 << mp->m_sb.sb_dirblklog; | |
bbaaf538 CH |
104 | mp->m_dirdatablk = xfs_dir2_db_to_da(mp, XFS_DIR2_DATA_FIRSTDB(mp)); |
105 | mp->m_dirleafblk = xfs_dir2_db_to_da(mp, XFS_DIR2_LEAF_FIRSTDB(mp)); | |
106 | mp->m_dirfreeblk = xfs_dir2_db_to_da(mp, XFS_DIR2_FREE_FIRSTDB(mp)); | |
37804376 | 107 | |
1c9a5b2e | 108 | nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; |
37804376 DC |
109 | mp->m_attr_node_ents = (mp->m_sb.sb_blocksize - nodehdr_size) / |
110 | (uint)sizeof(xfs_da_node_entry_t); | |
111 | mp->m_dir_node_ents = (mp->m_dirblksize - nodehdr_size) / | |
112 | (uint)sizeof(xfs_da_node_entry_t); | |
113 | ||
1da177e4 | 114 | mp->m_dir_magicpct = (mp->m_dirblksize * 37) / 100; |
189f4bf2 BN |
115 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
116 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
117 | else | |
118 | mp->m_dirnameops = &xfs_default_nameops; | |
32c5483a | 119 | |
1da177e4 LT |
120 | } |
121 | ||
122 | /* | |
123 | * Return 1 if directory contains only "." and "..". | |
124 | */ | |
f6c2d1fa NS |
125 | int |
126 | xfs_dir_isempty( | |
127 | xfs_inode_t *dp) | |
1da177e4 | 128 | { |
ac8ba50f | 129 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 130 | |
abbede1b | 131 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 132 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 133 | return 1; |
1da177e4 LT |
134 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
135 | return 0; | |
ac8ba50f CH |
136 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
137 | return !sfp->count; | |
1da177e4 LT |
138 | } |
139 | ||
f6c2d1fa NS |
140 | /* |
141 | * Validate a given inode number. | |
142 | */ | |
143 | int | |
144 | xfs_dir_ino_validate( | |
145 | xfs_mount_t *mp, | |
146 | xfs_ino_t ino) | |
147 | { | |
148 | xfs_agblock_t agblkno; | |
149 | xfs_agino_t agino; | |
150 | xfs_agnumber_t agno; | |
151 | int ino_ok; | |
152 | int ioff; | |
153 | ||
154 | agno = XFS_INO_TO_AGNO(mp, ino); | |
155 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
156 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
157 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
158 | ino_ok = | |
159 | agno < mp->m_sb.sb_agcount && | |
160 | agblkno < mp->m_sb.sb_agblocks && | |
161 | agblkno != 0 && | |
162 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
163 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
164 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
165 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 166 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
167 | (unsigned long long) ino); |
168 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
169 | return XFS_ERROR(EFSCORRUPTED); | |
170 | } | |
171 | return 0; | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /* |
175 | * Initialize a directory with its "." and ".." entries. | |
176 | */ | |
f6c2d1fa NS |
177 | int |
178 | xfs_dir_init( | |
179 | xfs_trans_t *tp, | |
180 | xfs_inode_t *dp, | |
181 | xfs_inode_t *pdp) | |
1da177e4 | 182 | { |
f6c2d1fa NS |
183 | xfs_da_args_t args; |
184 | int error; | |
1da177e4 LT |
185 | |
186 | memset((char *)&args, 0, sizeof(args)); | |
187 | args.dp = dp; | |
188 | args.trans = tp; | |
abbede1b | 189 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 190 | if ((error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino))) |
1da177e4 | 191 | return error; |
1da177e4 LT |
192 | return xfs_dir2_sf_create(&args, pdp->i_ino); |
193 | } | |
194 | ||
195 | /* | |
196 | Enter a name in a directory. | |
197 | */ | |
f6c2d1fa NS |
198 | int |
199 | xfs_dir_createname( | |
200 | xfs_trans_t *tp, | |
201 | xfs_inode_t *dp, | |
556b8b16 | 202 | struct xfs_name *name, |
1da177e4 LT |
203 | xfs_ino_t inum, /* new entry inode number */ |
204 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
205 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
206 | xfs_extlen_t total) /* bmap's total block count */ | |
207 | { | |
f6c2d1fa NS |
208 | xfs_da_args_t args; |
209 | int rval; | |
1da177e4 LT |
210 | int v; /* type-checking value */ |
211 | ||
abbede1b | 212 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 213 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 214 | return rval; |
1da177e4 | 215 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 216 | |
87affd08 | 217 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
218 | args.name = name->name; |
219 | args.namelen = name->len; | |
1c55cece | 220 | args.filetype = name->type; |
5163f95a | 221 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
222 | args.inumber = inum; |
223 | args.dp = dp; | |
224 | args.firstblock = first; | |
225 | args.flist = flist; | |
226 | args.total = total; | |
227 | args.whichfork = XFS_DATA_FORK; | |
228 | args.trans = tp; | |
6a178100 | 229 | args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; |
f6c2d1fa | 230 | |
1da177e4 LT |
231 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
232 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 233 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 234 | return rval; |
f6c2d1fa | 235 | else if (v) |
1da177e4 | 236 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 237 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 238 | return rval; |
f6c2d1fa | 239 | else if (v) |
1da177e4 LT |
240 | rval = xfs_dir2_leaf_addname(&args); |
241 | else | |
242 | rval = xfs_dir2_node_addname(&args); | |
243 | return rval; | |
244 | } | |
245 | ||
384f3ced BN |
246 | /* |
247 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
248 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
249 | */ | |
250 | int | |
251 | xfs_dir_cilookup_result( | |
252 | struct xfs_da_args *args, | |
a3380ae3 | 253 | const unsigned char *name, |
384f3ced BN |
254 | int len) |
255 | { | |
256 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
257 | return ENOENT; | |
258 | if (args->cmpresult != XFS_CMP_CASE || | |
259 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
260 | return EEXIST; | |
261 | ||
3f52c2f0 | 262 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced BN |
263 | if (!args->value) |
264 | return ENOMEM; | |
265 | ||
266 | memcpy(args->value, name, len); | |
267 | args->valuelen = len; | |
268 | return EEXIST; | |
269 | } | |
270 | ||
1da177e4 LT |
271 | /* |
272 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
273 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
274 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 275 | */ |
384f3ced | 276 | |
f6c2d1fa NS |
277 | int |
278 | xfs_dir_lookup( | |
279 | xfs_trans_t *tp, | |
280 | xfs_inode_t *dp, | |
556b8b16 | 281 | struct xfs_name *name, |
384f3ced BN |
282 | xfs_ino_t *inum, /* out: inode number */ |
283 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 284 | { |
f6c2d1fa NS |
285 | xfs_da_args_t args; |
286 | int rval; | |
1da177e4 LT |
287 | int v; /* type-checking value */ |
288 | ||
abbede1b | 289 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
290 | XFS_STATS_INC(xs_dir_lookup); |
291 | ||
87affd08 | 292 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
293 | args.name = name->name; |
294 | args.namelen = name->len; | |
1c55cece | 295 | args.filetype = name->type; |
5163f95a | 296 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 | 297 | args.dp = dp; |
1da177e4 LT |
298 | args.whichfork = XFS_DATA_FORK; |
299 | args.trans = tp; | |
6a178100 | 300 | args.op_flags = XFS_DA_OP_OKNOENT; |
384f3ced BN |
301 | if (ci_name) |
302 | args.op_flags |= XFS_DA_OP_CILOOKUP; | |
f6c2d1fa | 303 | |
1da177e4 LT |
304 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
305 | rval = xfs_dir2_sf_lookup(&args); | |
f6c2d1fa | 306 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 307 | return rval; |
f6c2d1fa | 308 | else if (v) |
1da177e4 | 309 | rval = xfs_dir2_block_lookup(&args); |
f6c2d1fa | 310 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 311 | return rval; |
f6c2d1fa | 312 | else if (v) |
1da177e4 LT |
313 | rval = xfs_dir2_leaf_lookup(&args); |
314 | else | |
315 | rval = xfs_dir2_node_lookup(&args); | |
316 | if (rval == EEXIST) | |
317 | rval = 0; | |
384f3ced | 318 | if (!rval) { |
1da177e4 | 319 | *inum = args.inumber; |
384f3ced BN |
320 | if (ci_name) { |
321 | ci_name->name = args.value; | |
322 | ci_name->len = args.valuelen; | |
323 | } | |
324 | } | |
1da177e4 LT |
325 | return rval; |
326 | } | |
327 | ||
328 | /* | |
329 | * Remove an entry from a directory. | |
330 | */ | |
f6c2d1fa NS |
331 | int |
332 | xfs_dir_removename( | |
333 | xfs_trans_t *tp, | |
334 | xfs_inode_t *dp, | |
556b8b16 | 335 | struct xfs_name *name, |
f6c2d1fa | 336 | xfs_ino_t ino, |
1da177e4 LT |
337 | xfs_fsblock_t *first, /* bmap's firstblock */ |
338 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
339 | xfs_extlen_t total) /* bmap's total block count */ | |
340 | { | |
f6c2d1fa NS |
341 | xfs_da_args_t args; |
342 | int rval; | |
1da177e4 LT |
343 | int v; /* type-checking value */ |
344 | ||
abbede1b | 345 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 346 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 347 | |
87affd08 | 348 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
349 | args.name = name->name; |
350 | args.namelen = name->len; | |
1c55cece | 351 | args.filetype = name->type; |
5163f95a | 352 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
353 | args.inumber = ino; |
354 | args.dp = dp; | |
355 | args.firstblock = first; | |
356 | args.flist = flist; | |
357 | args.total = total; | |
358 | args.whichfork = XFS_DATA_FORK; | |
359 | args.trans = tp; | |
f6c2d1fa | 360 | |
1da177e4 LT |
361 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
362 | rval = xfs_dir2_sf_removename(&args); | |
f6c2d1fa | 363 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 364 | return rval; |
f6c2d1fa | 365 | else if (v) |
1da177e4 | 366 | rval = xfs_dir2_block_removename(&args); |
f6c2d1fa | 367 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 368 | return rval; |
f6c2d1fa | 369 | else if (v) |
1da177e4 LT |
370 | rval = xfs_dir2_leaf_removename(&args); |
371 | else | |
372 | rval = xfs_dir2_node_removename(&args); | |
373 | return rval; | |
374 | } | |
375 | ||
1da177e4 LT |
376 | /* |
377 | * Replace the inode number of a directory entry. | |
378 | */ | |
f6c2d1fa NS |
379 | int |
380 | xfs_dir_replace( | |
381 | xfs_trans_t *tp, | |
382 | xfs_inode_t *dp, | |
556b8b16 | 383 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
384 | xfs_ino_t inum, /* new inode number */ |
385 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
386 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
387 | xfs_extlen_t total) /* bmap's total block count */ | |
388 | { | |
f6c2d1fa NS |
389 | xfs_da_args_t args; |
390 | int rval; | |
1da177e4 LT |
391 | int v; /* type-checking value */ |
392 | ||
abbede1b | 393 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 394 | |
f6c2d1fa | 395 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 396 | return rval; |
f6c2d1fa | 397 | |
87affd08 | 398 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
399 | args.name = name->name; |
400 | args.namelen = name->len; | |
0cb97766 | 401 | args.filetype = name->type; |
5163f95a | 402 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
403 | args.inumber = inum; |
404 | args.dp = dp; | |
405 | args.firstblock = first; | |
406 | args.flist = flist; | |
407 | args.total = total; | |
408 | args.whichfork = XFS_DATA_FORK; | |
409 | args.trans = tp; | |
f6c2d1fa | 410 | |
1da177e4 LT |
411 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
412 | rval = xfs_dir2_sf_replace(&args); | |
f6c2d1fa | 413 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 414 | return rval; |
f6c2d1fa | 415 | else if (v) |
1da177e4 | 416 | rval = xfs_dir2_block_replace(&args); |
f6c2d1fa | 417 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 418 | return rval; |
f6c2d1fa | 419 | else if (v) |
1da177e4 LT |
420 | rval = xfs_dir2_leaf_replace(&args); |
421 | else | |
422 | rval = xfs_dir2_node_replace(&args); | |
423 | return rval; | |
424 | } | |
425 | ||
426 | /* | |
427 | * See if this entry can be added to the directory without allocating space. | |
556b8b16 | 428 | * First checks that the caller couldn't reserve enough space (resblks = 0). |
1da177e4 | 429 | */ |
f6c2d1fa NS |
430 | int |
431 | xfs_dir_canenter( | |
432 | xfs_trans_t *tp, | |
433 | xfs_inode_t *dp, | |
556b8b16 BN |
434 | struct xfs_name *name, /* name of entry to add */ |
435 | uint resblks) | |
1da177e4 | 436 | { |
f6c2d1fa NS |
437 | xfs_da_args_t args; |
438 | int rval; | |
1da177e4 LT |
439 | int v; /* type-checking value */ |
440 | ||
556b8b16 BN |
441 | if (resblks) |
442 | return 0; | |
443 | ||
abbede1b | 444 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 445 | |
87affd08 | 446 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
447 | args.name = name->name; |
448 | args.namelen = name->len; | |
0cb97766 | 449 | args.filetype = name->type; |
5163f95a | 450 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 | 451 | args.dp = dp; |
1da177e4 LT |
452 | args.whichfork = XFS_DATA_FORK; |
453 | args.trans = tp; | |
6a178100 BN |
454 | args.op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME | |
455 | XFS_DA_OP_OKNOENT; | |
f6c2d1fa | 456 | |
1da177e4 LT |
457 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
458 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 459 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 460 | return rval; |
f6c2d1fa | 461 | else if (v) |
1da177e4 | 462 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 463 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 464 | return rval; |
f6c2d1fa | 465 | else if (v) |
1da177e4 LT |
466 | rval = xfs_dir2_leaf_addname(&args); |
467 | else | |
468 | rval = xfs_dir2_node_addname(&args); | |
469 | return rval; | |
470 | } | |
471 | ||
1da177e4 LT |
472 | /* |
473 | * Utility routines. | |
474 | */ | |
475 | ||
476 | /* | |
477 | * Add a block to the directory. | |
77936d02 CH |
478 | * |
479 | * This routine is for data and free blocks, not leaf/node blocks which are | |
480 | * handled by xfs_da_grow_inode. | |
1da177e4 | 481 | */ |
f6c2d1fa | 482 | int |
1da177e4 | 483 | xfs_dir2_grow_inode( |
77936d02 CH |
484 | struct xfs_da_args *args, |
485 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
486 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 487 | { |
77936d02 CH |
488 | struct xfs_inode *dp = args->dp; |
489 | struct xfs_mount *mp = dp->i_mount; | |
490 | xfs_fileoff_t bno; /* directory offset of new block */ | |
491 | int count; /* count of filesystem blocks */ | |
492 | int error; | |
1da177e4 | 493 | |
0b1b213f CH |
494 | trace_xfs_dir2_grow_inode(args, space); |
495 | ||
1da177e4 LT |
496 | /* |
497 | * Set lowest possible block in the space requested. | |
498 | */ | |
499 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
500 | count = mp->m_dirblkfsbs; | |
77936d02 CH |
501 | |
502 | error = xfs_da_grow_inode_int(args, &bno, count); | |
503 | if (error) | |
1da177e4 | 504 | return error; |
a7444053 | 505 | |
bbaaf538 | 506 | *dbp = xfs_dir2_da_to_db(mp, (xfs_dablk_t)bno); |
a7444053 | 507 | |
1da177e4 LT |
508 | /* |
509 | * Update file's size if this is the data space and it grew. | |
510 | */ | |
511 | if (space == XFS_DIR2_DATA_SPACE) { | |
512 | xfs_fsize_t size; /* directory file (data) size */ | |
513 | ||
514 | size = XFS_FSB_TO_B(mp, bno + count); | |
515 | if (size > dp->i_d.di_size) { | |
516 | dp->i_d.di_size = size; | |
77936d02 | 517 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
518 | } |
519 | } | |
520 | return 0; | |
521 | } | |
522 | ||
523 | /* | |
524 | * See if the directory is a single-block form directory. | |
525 | */ | |
f6c2d1fa | 526 | int |
1da177e4 | 527 | xfs_dir2_isblock( |
f6c2d1fa NS |
528 | xfs_trans_t *tp, |
529 | xfs_inode_t *dp, | |
1da177e4 LT |
530 | int *vp) /* out: 1 is block, 0 is not block */ |
531 | { | |
532 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
533 | xfs_mount_t *mp; |
534 | int rval; | |
1da177e4 LT |
535 | |
536 | mp = dp->i_mount; | |
f6c2d1fa | 537 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 538 | return rval; |
1da177e4 LT |
539 | rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize; |
540 | ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize); | |
541 | *vp = rval; | |
542 | return 0; | |
543 | } | |
544 | ||
545 | /* | |
546 | * See if the directory is a single-leaf form directory. | |
547 | */ | |
f6c2d1fa | 548 | int |
1da177e4 | 549 | xfs_dir2_isleaf( |
f6c2d1fa NS |
550 | xfs_trans_t *tp, |
551 | xfs_inode_t *dp, | |
1da177e4 LT |
552 | int *vp) /* out: 1 is leaf, 0 is not leaf */ |
553 | { | |
554 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
555 | xfs_mount_t *mp; |
556 | int rval; | |
1da177e4 LT |
557 | |
558 | mp = dp->i_mount; | |
f6c2d1fa | 559 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 560 | return rval; |
1da177e4 LT |
561 | *vp = last == mp->m_dirleafblk + (1 << mp->m_sb.sb_dirblklog); |
562 | return 0; | |
563 | } | |
564 | ||
1da177e4 LT |
565 | /* |
566 | * Remove the given block from the directory. | |
567 | * This routine is used for data and free blocks, leaf/node are done | |
568 | * by xfs_da_shrink_inode. | |
569 | */ | |
570 | int | |
571 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
572 | xfs_da_args_t *args, |
573 | xfs_dir2_db_t db, | |
1d9025e5 | 574 | struct xfs_buf *bp) |
1da177e4 LT |
575 | { |
576 | xfs_fileoff_t bno; /* directory file offset */ | |
577 | xfs_dablk_t da; /* directory file offset */ | |
578 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
579 | xfs_inode_t *dp; |
580 | int error; | |
581 | xfs_mount_t *mp; | |
582 | xfs_trans_t *tp; | |
1da177e4 | 583 | |
0b1b213f CH |
584 | trace_xfs_dir2_shrink_inode(args, db); |
585 | ||
1da177e4 LT |
586 | dp = args->dp; |
587 | mp = dp->i_mount; | |
588 | tp = args->trans; | |
bbaaf538 | 589 | da = xfs_dir2_db_to_da(mp, db); |
1da177e4 LT |
590 | /* |
591 | * Unmap the fsblock(s). | |
592 | */ | |
593 | if ((error = xfs_bunmapi(tp, dp, da, mp->m_dirblkfsbs, | |
594 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, | |
b4e9181e | 595 | &done))) { |
1da177e4 LT |
596 | /* |
597 | * ENOSPC actually can happen if we're in a removename with | |
598 | * no space reservation, and the resulting block removal | |
599 | * would cause a bmap btree split or conversion from extents | |
600 | * to btree. This can only happen for un-fragmented | |
601 | * directory blocks, since you need to be punching out | |
602 | * the middle of an extent. | |
603 | * In this case we need to leave the block in the file, | |
604 | * and not binval it. | |
605 | * So the block has to be in a consistent empty state | |
606 | * and appropriately logged. | |
607 | * We don't free up the buffer, the caller can tell it | |
608 | * hasn't happened since it got an error back. | |
609 | */ | |
610 | return error; | |
611 | } | |
612 | ASSERT(done); | |
613 | /* | |
614 | * Invalidate the buffer from the transaction. | |
615 | */ | |
1d9025e5 | 616 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
617 | /* |
618 | * If it's not a data block, we're done. | |
619 | */ | |
620 | if (db >= XFS_DIR2_LEAF_FIRSTDB(mp)) | |
621 | return 0; | |
622 | /* | |
623 | * If the block isn't the last one in the directory, we're done. | |
624 | */ | |
bbaaf538 | 625 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(mp, db + 1, 0)) |
1da177e4 LT |
626 | return 0; |
627 | bno = da; | |
628 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
629 | /* | |
630 | * This can't really happen unless there's kernel corruption. | |
631 | */ | |
632 | return error; | |
633 | } | |
634 | if (db == mp->m_dirdatablk) | |
635 | ASSERT(bno == 0); | |
636 | else | |
637 | ASSERT(bno > 0); | |
638 | /* | |
639 | * Set the size to the new last block. | |
640 | */ | |
641 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
642 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
643 | return 0; | |
644 | } |