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" |
1da177e4 | 20 | #include "xfs_types.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
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_bmap_btree.h" |
a844f451 | 30 | #include "xfs_alloc_btree.h" |
1da177e4 | 31 | #include "xfs_dinode.h" |
1da177e4 | 32 | #include "xfs_inode.h" |
a844f451 | 33 | #include "xfs_inode_item.h" |
1da177e4 | 34 | #include "xfs_bmap.h" |
2b9ab5ab | 35 | #include "xfs_dir2.h" |
57926640 | 36 | #include "xfs_dir2_priv.h" |
1da177e4 | 37 | #include "xfs_error.h" |
0b1b213f | 38 | #include "xfs_trace.h" |
1da177e4 | 39 | |
0cb97766 DC |
40 | struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR }; |
41 | ||
1da177e4 | 42 | |
189f4bf2 BN |
43 | /* |
44 | * ASCII case-insensitive (ie. A-Z) support for directories that was | |
45 | * used in IRIX. | |
46 | */ | |
47 | STATIC xfs_dahash_t | |
48 | xfs_ascii_ci_hashname( | |
49 | struct xfs_name *name) | |
50 | { | |
51 | xfs_dahash_t hash; | |
52 | int i; | |
53 | ||
54 | for (i = 0, hash = 0; i < name->len; i++) | |
55 | hash = tolower(name->name[i]) ^ rol32(hash, 7); | |
56 | ||
57 | return hash; | |
58 | } | |
59 | ||
60 | STATIC enum xfs_dacmp | |
61 | xfs_ascii_ci_compname( | |
62 | struct xfs_da_args *args, | |
2bc75421 DC |
63 | const unsigned char *name, |
64 | int len) | |
189f4bf2 BN |
65 | { |
66 | enum xfs_dacmp result; | |
67 | int i; | |
68 | ||
69 | if (args->namelen != len) | |
70 | return XFS_CMP_DIFFERENT; | |
71 | ||
72 | result = XFS_CMP_EXACT; | |
73 | for (i = 0; i < len; i++) { | |
74 | if (args->name[i] == name[i]) | |
75 | continue; | |
76 | if (tolower(args->name[i]) != tolower(name[i])) | |
77 | return XFS_CMP_DIFFERENT; | |
78 | result = XFS_CMP_CASE; | |
79 | } | |
80 | ||
81 | return result; | |
82 | } | |
83 | ||
84 | static struct xfs_nameops xfs_ascii_ci_nameops = { | |
85 | .hashname = xfs_ascii_ci_hashname, | |
86 | .compname = xfs_ascii_ci_compname, | |
87 | }; | |
88 | ||
f6c2d1fa NS |
89 | void |
90 | xfs_dir_mount( | |
91 | xfs_mount_t *mp) | |
1da177e4 | 92 | { |
37804376 DC |
93 | int nodehdr_size; |
94 | ||
95 | ||
62118709 | 96 | ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb)); |
1da177e4 LT |
97 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
98 | XFS_MAX_BLOCKSIZE); | |
99 | mp->m_dirblksize = 1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog); | |
100 | mp->m_dirblkfsbs = 1 << mp->m_sb.sb_dirblklog; | |
bbaaf538 CH |
101 | mp->m_dirdatablk = xfs_dir2_db_to_da(mp, XFS_DIR2_DATA_FIRSTDB(mp)); |
102 | mp->m_dirleafblk = xfs_dir2_db_to_da(mp, XFS_DIR2_LEAF_FIRSTDB(mp)); | |
103 | mp->m_dirfreeblk = xfs_dir2_db_to_da(mp, XFS_DIR2_FREE_FIRSTDB(mp)); | |
37804376 DC |
104 | |
105 | nodehdr_size = __xfs_da3_node_hdr_size(xfs_sb_version_hascrc(&mp->m_sb)); | |
106 | mp->m_attr_node_ents = (mp->m_sb.sb_blocksize - nodehdr_size) / | |
107 | (uint)sizeof(xfs_da_node_entry_t); | |
108 | mp->m_dir_node_ents = (mp->m_dirblksize - nodehdr_size) / | |
109 | (uint)sizeof(xfs_da_node_entry_t); | |
110 | ||
1da177e4 | 111 | mp->m_dir_magicpct = (mp->m_dirblksize * 37) / 100; |
189f4bf2 BN |
112 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
113 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
114 | else | |
115 | mp->m_dirnameops = &xfs_default_nameops; | |
1da177e4 LT |
116 | } |
117 | ||
118 | /* | |
119 | * Return 1 if directory contains only "." and "..". | |
120 | */ | |
f6c2d1fa NS |
121 | int |
122 | xfs_dir_isempty( | |
123 | xfs_inode_t *dp) | |
1da177e4 | 124 | { |
ac8ba50f | 125 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 126 | |
abbede1b | 127 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 128 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 129 | return 1; |
1da177e4 LT |
130 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
131 | return 0; | |
ac8ba50f CH |
132 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
133 | return !sfp->count; | |
1da177e4 LT |
134 | } |
135 | ||
f6c2d1fa NS |
136 | /* |
137 | * Validate a given inode number. | |
138 | */ | |
139 | int | |
140 | xfs_dir_ino_validate( | |
141 | xfs_mount_t *mp, | |
142 | xfs_ino_t ino) | |
143 | { | |
144 | xfs_agblock_t agblkno; | |
145 | xfs_agino_t agino; | |
146 | xfs_agnumber_t agno; | |
147 | int ino_ok; | |
148 | int ioff; | |
149 | ||
150 | agno = XFS_INO_TO_AGNO(mp, ino); | |
151 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
152 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
153 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
154 | ino_ok = | |
155 | agno < mp->m_sb.sb_agcount && | |
156 | agblkno < mp->m_sb.sb_agblocks && | |
157 | agblkno != 0 && | |
158 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
159 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
160 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
161 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 162 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
163 | (unsigned long long) ino); |
164 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
165 | return XFS_ERROR(EFSCORRUPTED); | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
1da177e4 LT |
170 | /* |
171 | * Initialize a directory with its "." and ".." entries. | |
172 | */ | |
f6c2d1fa NS |
173 | int |
174 | xfs_dir_init( | |
175 | xfs_trans_t *tp, | |
176 | xfs_inode_t *dp, | |
177 | xfs_inode_t *pdp) | |
1da177e4 | 178 | { |
f6c2d1fa NS |
179 | xfs_da_args_t args; |
180 | int error; | |
1da177e4 LT |
181 | |
182 | memset((char *)&args, 0, sizeof(args)); | |
183 | args.dp = dp; | |
184 | args.trans = tp; | |
abbede1b | 185 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 186 | if ((error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino))) |
1da177e4 | 187 | return error; |
1da177e4 LT |
188 | return xfs_dir2_sf_create(&args, pdp->i_ino); |
189 | } | |
190 | ||
191 | /* | |
192 | Enter a name in a directory. | |
193 | */ | |
f6c2d1fa NS |
194 | int |
195 | xfs_dir_createname( | |
196 | xfs_trans_t *tp, | |
197 | xfs_inode_t *dp, | |
556b8b16 | 198 | struct xfs_name *name, |
1da177e4 LT |
199 | xfs_ino_t inum, /* new entry inode number */ |
200 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
201 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
202 | xfs_extlen_t total) /* bmap's total block count */ | |
203 | { | |
f6c2d1fa NS |
204 | xfs_da_args_t args; |
205 | int rval; | |
1da177e4 LT |
206 | int v; /* type-checking value */ |
207 | ||
abbede1b | 208 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 209 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 210 | return rval; |
1da177e4 | 211 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 212 | |
87affd08 | 213 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
214 | args.name = name->name; |
215 | args.namelen = name->len; | |
1c55cece | 216 | args.filetype = name->type; |
5163f95a | 217 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
218 | args.inumber = inum; |
219 | args.dp = dp; | |
220 | args.firstblock = first; | |
221 | args.flist = flist; | |
222 | args.total = total; | |
223 | args.whichfork = XFS_DATA_FORK; | |
224 | args.trans = tp; | |
6a178100 | 225 | args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; |
f6c2d1fa | 226 | |
1da177e4 LT |
227 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
228 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 229 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 230 | return rval; |
f6c2d1fa | 231 | else if (v) |
1da177e4 | 232 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 233 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 234 | return rval; |
f6c2d1fa | 235 | else if (v) |
1da177e4 LT |
236 | rval = xfs_dir2_leaf_addname(&args); |
237 | else | |
238 | rval = xfs_dir2_node_addname(&args); | |
239 | return rval; | |
240 | } | |
241 | ||
384f3ced BN |
242 | /* |
243 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
244 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
245 | */ | |
246 | int | |
247 | xfs_dir_cilookup_result( | |
248 | struct xfs_da_args *args, | |
a3380ae3 | 249 | const unsigned char *name, |
384f3ced BN |
250 | int len) |
251 | { | |
252 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
253 | return ENOENT; | |
254 | if (args->cmpresult != XFS_CMP_CASE || | |
255 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
256 | return EEXIST; | |
257 | ||
3f52c2f0 | 258 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced BN |
259 | if (!args->value) |
260 | return ENOMEM; | |
261 | ||
262 | memcpy(args->value, name, len); | |
263 | args->valuelen = len; | |
264 | return EEXIST; | |
265 | } | |
266 | ||
1da177e4 LT |
267 | /* |
268 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
269 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
270 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 271 | */ |
384f3ced | 272 | |
f6c2d1fa NS |
273 | int |
274 | xfs_dir_lookup( | |
275 | xfs_trans_t *tp, | |
276 | xfs_inode_t *dp, | |
556b8b16 | 277 | struct xfs_name *name, |
384f3ced BN |
278 | xfs_ino_t *inum, /* out: inode number */ |
279 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 280 | { |
f6c2d1fa NS |
281 | xfs_da_args_t args; |
282 | int rval; | |
1da177e4 LT |
283 | int v; /* type-checking value */ |
284 | ||
abbede1b | 285 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
286 | XFS_STATS_INC(xs_dir_lookup); |
287 | ||
87affd08 | 288 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
289 | args.name = name->name; |
290 | args.namelen = name->len; | |
1c55cece | 291 | args.filetype = name->type; |
5163f95a | 292 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 | 293 | args.dp = dp; |
1da177e4 LT |
294 | args.whichfork = XFS_DATA_FORK; |
295 | args.trans = tp; | |
6a178100 | 296 | args.op_flags = XFS_DA_OP_OKNOENT; |
384f3ced BN |
297 | if (ci_name) |
298 | args.op_flags |= XFS_DA_OP_CILOOKUP; | |
f6c2d1fa | 299 | |
1da177e4 LT |
300 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
301 | rval = xfs_dir2_sf_lookup(&args); | |
f6c2d1fa | 302 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 303 | return rval; |
f6c2d1fa | 304 | else if (v) |
1da177e4 | 305 | rval = xfs_dir2_block_lookup(&args); |
f6c2d1fa | 306 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 307 | return rval; |
f6c2d1fa | 308 | else if (v) |
1da177e4 LT |
309 | rval = xfs_dir2_leaf_lookup(&args); |
310 | else | |
311 | rval = xfs_dir2_node_lookup(&args); | |
312 | if (rval == EEXIST) | |
313 | rval = 0; | |
384f3ced | 314 | if (!rval) { |
1da177e4 | 315 | *inum = args.inumber; |
384f3ced BN |
316 | if (ci_name) { |
317 | ci_name->name = args.value; | |
318 | ci_name->len = args.valuelen; | |
319 | } | |
320 | } | |
1da177e4 LT |
321 | return rval; |
322 | } | |
323 | ||
324 | /* | |
325 | * Remove an entry from a directory. | |
326 | */ | |
f6c2d1fa NS |
327 | int |
328 | xfs_dir_removename( | |
329 | xfs_trans_t *tp, | |
330 | xfs_inode_t *dp, | |
556b8b16 | 331 | struct xfs_name *name, |
f6c2d1fa | 332 | xfs_ino_t ino, |
1da177e4 LT |
333 | xfs_fsblock_t *first, /* bmap's firstblock */ |
334 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
335 | xfs_extlen_t total) /* bmap's total block count */ | |
336 | { | |
f6c2d1fa NS |
337 | xfs_da_args_t args; |
338 | int rval; | |
1da177e4 LT |
339 | int v; /* type-checking value */ |
340 | ||
abbede1b | 341 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 342 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 343 | |
87affd08 | 344 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
345 | args.name = name->name; |
346 | args.namelen = name->len; | |
1c55cece | 347 | args.filetype = name->type; |
5163f95a | 348 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
349 | args.inumber = ino; |
350 | args.dp = dp; | |
351 | args.firstblock = first; | |
352 | args.flist = flist; | |
353 | args.total = total; | |
354 | args.whichfork = XFS_DATA_FORK; | |
355 | args.trans = tp; | |
f6c2d1fa | 356 | |
1da177e4 LT |
357 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
358 | rval = xfs_dir2_sf_removename(&args); | |
f6c2d1fa | 359 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 360 | return rval; |
f6c2d1fa | 361 | else if (v) |
1da177e4 | 362 | rval = xfs_dir2_block_removename(&args); |
f6c2d1fa | 363 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 364 | return rval; |
f6c2d1fa | 365 | else if (v) |
1da177e4 LT |
366 | rval = xfs_dir2_leaf_removename(&args); |
367 | else | |
368 | rval = xfs_dir2_node_removename(&args); | |
369 | return rval; | |
370 | } | |
371 | ||
1da177e4 LT |
372 | /* |
373 | * Replace the inode number of a directory entry. | |
374 | */ | |
f6c2d1fa NS |
375 | int |
376 | xfs_dir_replace( | |
377 | xfs_trans_t *tp, | |
378 | xfs_inode_t *dp, | |
556b8b16 | 379 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
380 | xfs_ino_t inum, /* new inode number */ |
381 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
382 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
383 | xfs_extlen_t total) /* bmap's total block count */ | |
384 | { | |
f6c2d1fa NS |
385 | xfs_da_args_t args; |
386 | int rval; | |
1da177e4 LT |
387 | int v; /* type-checking value */ |
388 | ||
abbede1b | 389 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 390 | |
f6c2d1fa | 391 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 392 | return rval; |
f6c2d1fa | 393 | |
87affd08 | 394 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
395 | args.name = name->name; |
396 | args.namelen = name->len; | |
0cb97766 | 397 | args.filetype = name->type; |
5163f95a | 398 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
399 | args.inumber = inum; |
400 | args.dp = dp; | |
401 | args.firstblock = first; | |
402 | args.flist = flist; | |
403 | args.total = total; | |
404 | args.whichfork = XFS_DATA_FORK; | |
405 | args.trans = tp; | |
f6c2d1fa | 406 | |
1da177e4 LT |
407 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
408 | rval = xfs_dir2_sf_replace(&args); | |
f6c2d1fa | 409 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 410 | return rval; |
f6c2d1fa | 411 | else if (v) |
1da177e4 | 412 | rval = xfs_dir2_block_replace(&args); |
f6c2d1fa | 413 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 414 | return rval; |
f6c2d1fa | 415 | else if (v) |
1da177e4 LT |
416 | rval = xfs_dir2_leaf_replace(&args); |
417 | else | |
418 | rval = xfs_dir2_node_replace(&args); | |
419 | return rval; | |
420 | } | |
421 | ||
422 | /* | |
423 | * See if this entry can be added to the directory without allocating space. | |
556b8b16 | 424 | * First checks that the caller couldn't reserve enough space (resblks = 0). |
1da177e4 | 425 | */ |
f6c2d1fa NS |
426 | int |
427 | xfs_dir_canenter( | |
428 | xfs_trans_t *tp, | |
429 | xfs_inode_t *dp, | |
556b8b16 BN |
430 | struct xfs_name *name, /* name of entry to add */ |
431 | uint resblks) | |
1da177e4 | 432 | { |
f6c2d1fa NS |
433 | xfs_da_args_t args; |
434 | int rval; | |
1da177e4 LT |
435 | int v; /* type-checking value */ |
436 | ||
556b8b16 BN |
437 | if (resblks) |
438 | return 0; | |
439 | ||
abbede1b | 440 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 441 | |
87affd08 | 442 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
443 | args.name = name->name; |
444 | args.namelen = name->len; | |
0cb97766 | 445 | args.filetype = name->type; |
5163f95a | 446 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 | 447 | args.dp = dp; |
1da177e4 LT |
448 | args.whichfork = XFS_DATA_FORK; |
449 | args.trans = tp; | |
6a178100 BN |
450 | args.op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME | |
451 | XFS_DA_OP_OKNOENT; | |
f6c2d1fa | 452 | |
1da177e4 LT |
453 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
454 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 455 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 456 | return rval; |
f6c2d1fa | 457 | else if (v) |
1da177e4 | 458 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 459 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 460 | return rval; |
f6c2d1fa | 461 | else if (v) |
1da177e4 LT |
462 | rval = xfs_dir2_leaf_addname(&args); |
463 | else | |
464 | rval = xfs_dir2_node_addname(&args); | |
465 | return rval; | |
466 | } | |
467 | ||
1da177e4 LT |
468 | /* |
469 | * Utility routines. | |
470 | */ | |
471 | ||
472 | /* | |
473 | * Add a block to the directory. | |
77936d02 CH |
474 | * |
475 | * This routine is for data and free blocks, not leaf/node blocks which are | |
476 | * handled by xfs_da_grow_inode. | |
1da177e4 | 477 | */ |
f6c2d1fa | 478 | int |
1da177e4 | 479 | xfs_dir2_grow_inode( |
77936d02 CH |
480 | struct xfs_da_args *args, |
481 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
482 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 483 | { |
77936d02 CH |
484 | struct xfs_inode *dp = args->dp; |
485 | struct xfs_mount *mp = dp->i_mount; | |
486 | xfs_fileoff_t bno; /* directory offset of new block */ | |
487 | int count; /* count of filesystem blocks */ | |
488 | int error; | |
1da177e4 | 489 | |
0b1b213f CH |
490 | trace_xfs_dir2_grow_inode(args, space); |
491 | ||
1da177e4 LT |
492 | /* |
493 | * Set lowest possible block in the space requested. | |
494 | */ | |
495 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
496 | count = mp->m_dirblkfsbs; | |
77936d02 CH |
497 | |
498 | error = xfs_da_grow_inode_int(args, &bno, count); | |
499 | if (error) | |
1da177e4 | 500 | return error; |
a7444053 | 501 | |
bbaaf538 | 502 | *dbp = xfs_dir2_da_to_db(mp, (xfs_dablk_t)bno); |
a7444053 | 503 | |
1da177e4 LT |
504 | /* |
505 | * Update file's size if this is the data space and it grew. | |
506 | */ | |
507 | if (space == XFS_DIR2_DATA_SPACE) { | |
508 | xfs_fsize_t size; /* directory file (data) size */ | |
509 | ||
510 | size = XFS_FSB_TO_B(mp, bno + count); | |
511 | if (size > dp->i_d.di_size) { | |
512 | dp->i_d.di_size = size; | |
77936d02 | 513 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
514 | } |
515 | } | |
516 | return 0; | |
517 | } | |
518 | ||
519 | /* | |
520 | * See if the directory is a single-block form directory. | |
521 | */ | |
f6c2d1fa | 522 | int |
1da177e4 | 523 | xfs_dir2_isblock( |
f6c2d1fa NS |
524 | xfs_trans_t *tp, |
525 | xfs_inode_t *dp, | |
1da177e4 LT |
526 | int *vp) /* out: 1 is block, 0 is not block */ |
527 | { | |
528 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
529 | xfs_mount_t *mp; |
530 | int rval; | |
1da177e4 LT |
531 | |
532 | mp = dp->i_mount; | |
f6c2d1fa | 533 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 534 | return rval; |
1da177e4 LT |
535 | rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize; |
536 | ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize); | |
537 | *vp = rval; | |
538 | return 0; | |
539 | } | |
540 | ||
541 | /* | |
542 | * See if the directory is a single-leaf form directory. | |
543 | */ | |
f6c2d1fa | 544 | int |
1da177e4 | 545 | xfs_dir2_isleaf( |
f6c2d1fa NS |
546 | xfs_trans_t *tp, |
547 | xfs_inode_t *dp, | |
1da177e4 LT |
548 | int *vp) /* out: 1 is leaf, 0 is not leaf */ |
549 | { | |
550 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
551 | xfs_mount_t *mp; |
552 | int rval; | |
1da177e4 LT |
553 | |
554 | mp = dp->i_mount; | |
f6c2d1fa | 555 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 556 | return rval; |
1da177e4 LT |
557 | *vp = last == mp->m_dirleafblk + (1 << mp->m_sb.sb_dirblklog); |
558 | return 0; | |
559 | } | |
560 | ||
1da177e4 LT |
561 | /* |
562 | * Remove the given block from the directory. | |
563 | * This routine is used for data and free blocks, leaf/node are done | |
564 | * by xfs_da_shrink_inode. | |
565 | */ | |
566 | int | |
567 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
568 | xfs_da_args_t *args, |
569 | xfs_dir2_db_t db, | |
1d9025e5 | 570 | struct xfs_buf *bp) |
1da177e4 LT |
571 | { |
572 | xfs_fileoff_t bno; /* directory file offset */ | |
573 | xfs_dablk_t da; /* directory file offset */ | |
574 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
575 | xfs_inode_t *dp; |
576 | int error; | |
577 | xfs_mount_t *mp; | |
578 | xfs_trans_t *tp; | |
1da177e4 | 579 | |
0b1b213f CH |
580 | trace_xfs_dir2_shrink_inode(args, db); |
581 | ||
1da177e4 LT |
582 | dp = args->dp; |
583 | mp = dp->i_mount; | |
584 | tp = args->trans; | |
bbaaf538 | 585 | da = xfs_dir2_db_to_da(mp, db); |
1da177e4 LT |
586 | /* |
587 | * Unmap the fsblock(s). | |
588 | */ | |
589 | if ((error = xfs_bunmapi(tp, dp, da, mp->m_dirblkfsbs, | |
590 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, | |
b4e9181e | 591 | &done))) { |
1da177e4 LT |
592 | /* |
593 | * ENOSPC actually can happen if we're in a removename with | |
594 | * no space reservation, and the resulting block removal | |
595 | * would cause a bmap btree split or conversion from extents | |
596 | * to btree. This can only happen for un-fragmented | |
597 | * directory blocks, since you need to be punching out | |
598 | * the middle of an extent. | |
599 | * In this case we need to leave the block in the file, | |
600 | * and not binval it. | |
601 | * So the block has to be in a consistent empty state | |
602 | * and appropriately logged. | |
603 | * We don't free up the buffer, the caller can tell it | |
604 | * hasn't happened since it got an error back. | |
605 | */ | |
606 | return error; | |
607 | } | |
608 | ASSERT(done); | |
609 | /* | |
610 | * Invalidate the buffer from the transaction. | |
611 | */ | |
1d9025e5 | 612 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
613 | /* |
614 | * If it's not a data block, we're done. | |
615 | */ | |
616 | if (db >= XFS_DIR2_LEAF_FIRSTDB(mp)) | |
617 | return 0; | |
618 | /* | |
619 | * If the block isn't the last one in the directory, we're done. | |
620 | */ | |
bbaaf538 | 621 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(mp, db + 1, 0)) |
1da177e4 LT |
622 | return 0; |
623 | bno = da; | |
624 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
625 | /* | |
626 | * This can't really happen unless there's kernel corruption. | |
627 | */ | |
628 | return error; | |
629 | } | |
630 | if (db == mp->m_dirdatablk) | |
631 | ASSERT(bno == 0); | |
632 | else | |
633 | ASSERT(bno > 0); | |
634 | /* | |
635 | * Set the size to the new last block. | |
636 | */ | |
637 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
638 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
639 | return 0; | |
640 | } |