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Commit | Line | Data |
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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" |
a844f451 | 27 | #include "xfs_da_btree.h" |
1da177e4 | 28 | #include "xfs_bmap_btree.h" |
a844f451 | 29 | #include "xfs_alloc_btree.h" |
1da177e4 | 30 | #include "xfs_dinode.h" |
1da177e4 | 31 | #include "xfs_inode.h" |
a844f451 | 32 | #include "xfs_inode_item.h" |
1da177e4 | 33 | #include "xfs_bmap.h" |
57926640 CH |
34 | #include "xfs_dir2.h" |
35 | #include "xfs_dir2_format.h" | |
36 | #include "xfs_dir2_priv.h" | |
1da177e4 | 37 | #include "xfs_error.h" |
a8272ce0 | 38 | #include "xfs_vnodeops.h" |
0b1b213f | 39 | #include "xfs_trace.h" |
1da177e4 | 40 | |
4a24cb71 | 41 | struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2}; |
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 | { |
62118709 | 93 | ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb)); |
1da177e4 LT |
94 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
95 | XFS_MAX_BLOCKSIZE); | |
96 | mp->m_dirblksize = 1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog); | |
97 | mp->m_dirblkfsbs = 1 << mp->m_sb.sb_dirblklog; | |
bbaaf538 CH |
98 | mp->m_dirdatablk = xfs_dir2_db_to_da(mp, XFS_DIR2_DATA_FIRSTDB(mp)); |
99 | mp->m_dirleafblk = xfs_dir2_db_to_da(mp, XFS_DIR2_LEAF_FIRSTDB(mp)); | |
100 | mp->m_dirfreeblk = xfs_dir2_db_to_da(mp, XFS_DIR2_FREE_FIRSTDB(mp)); | |
1da177e4 LT |
101 | mp->m_attr_node_ents = |
102 | (mp->m_sb.sb_blocksize - (uint)sizeof(xfs_da_node_hdr_t)) / | |
103 | (uint)sizeof(xfs_da_node_entry_t); | |
104 | mp->m_dir_node_ents = | |
105 | (mp->m_dirblksize - (uint)sizeof(xfs_da_node_hdr_t)) / | |
106 | (uint)sizeof(xfs_da_node_entry_t); | |
107 | mp->m_dir_magicpct = (mp->m_dirblksize * 37) / 100; | |
189f4bf2 BN |
108 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
109 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
110 | else | |
111 | mp->m_dirnameops = &xfs_default_nameops; | |
1da177e4 LT |
112 | } |
113 | ||
114 | /* | |
115 | * Return 1 if directory contains only "." and "..". | |
116 | */ | |
f6c2d1fa NS |
117 | int |
118 | xfs_dir_isempty( | |
119 | xfs_inode_t *dp) | |
1da177e4 | 120 | { |
ac8ba50f | 121 | xfs_dir2_sf_hdr_t *sfp; |
1da177e4 | 122 | |
abbede1b | 123 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 124 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 125 | return 1; |
1da177e4 LT |
126 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
127 | return 0; | |
ac8ba50f CH |
128 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
129 | return !sfp->count; | |
1da177e4 LT |
130 | } |
131 | ||
f6c2d1fa NS |
132 | /* |
133 | * Validate a given inode number. | |
134 | */ | |
135 | int | |
136 | xfs_dir_ino_validate( | |
137 | xfs_mount_t *mp, | |
138 | xfs_ino_t ino) | |
139 | { | |
140 | xfs_agblock_t agblkno; | |
141 | xfs_agino_t agino; | |
142 | xfs_agnumber_t agno; | |
143 | int ino_ok; | |
144 | int ioff; | |
145 | ||
146 | agno = XFS_INO_TO_AGNO(mp, ino); | |
147 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
148 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
149 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
150 | ino_ok = | |
151 | agno < mp->m_sb.sb_agcount && | |
152 | agblkno < mp->m_sb.sb_agblocks && | |
153 | agblkno != 0 && | |
154 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
155 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
156 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
157 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
53487786 | 158 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
f6c2d1fa NS |
159 | (unsigned long long) ino); |
160 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
161 | return XFS_ERROR(EFSCORRUPTED); | |
162 | } | |
163 | return 0; | |
164 | } | |
165 | ||
1da177e4 LT |
166 | /* |
167 | * Initialize a directory with its "." and ".." entries. | |
168 | */ | |
f6c2d1fa NS |
169 | int |
170 | xfs_dir_init( | |
171 | xfs_trans_t *tp, | |
172 | xfs_inode_t *dp, | |
173 | xfs_inode_t *pdp) | |
1da177e4 | 174 | { |
f6c2d1fa NS |
175 | xfs_da_args_t args; |
176 | int error; | |
1da177e4 LT |
177 | |
178 | memset((char *)&args, 0, sizeof(args)); | |
179 | args.dp = dp; | |
180 | args.trans = tp; | |
abbede1b | 181 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 182 | if ((error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino))) |
1da177e4 | 183 | return error; |
1da177e4 LT |
184 | return xfs_dir2_sf_create(&args, pdp->i_ino); |
185 | } | |
186 | ||
187 | /* | |
188 | Enter a name in a directory. | |
189 | */ | |
f6c2d1fa NS |
190 | int |
191 | xfs_dir_createname( | |
192 | xfs_trans_t *tp, | |
193 | xfs_inode_t *dp, | |
556b8b16 | 194 | struct xfs_name *name, |
1da177e4 LT |
195 | xfs_ino_t inum, /* new entry inode number */ |
196 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
197 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
198 | xfs_extlen_t total) /* bmap's total block count */ | |
199 | { | |
f6c2d1fa NS |
200 | xfs_da_args_t args; |
201 | int rval; | |
1da177e4 LT |
202 | int v; /* type-checking value */ |
203 | ||
abbede1b | 204 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 205 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 206 | return rval; |
1da177e4 | 207 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 208 | |
87affd08 | 209 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
210 | args.name = name->name; |
211 | args.namelen = name->len; | |
5163f95a | 212 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
213 | args.inumber = inum; |
214 | args.dp = dp; | |
215 | args.firstblock = first; | |
216 | args.flist = flist; | |
217 | args.total = total; | |
218 | args.whichfork = XFS_DATA_FORK; | |
219 | args.trans = tp; | |
6a178100 | 220 | args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; |
f6c2d1fa | 221 | |
1da177e4 LT |
222 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
223 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 224 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 225 | return rval; |
f6c2d1fa | 226 | else if (v) |
1da177e4 | 227 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 228 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 229 | return rval; |
f6c2d1fa | 230 | else if (v) |
1da177e4 LT |
231 | rval = xfs_dir2_leaf_addname(&args); |
232 | else | |
233 | rval = xfs_dir2_node_addname(&args); | |
234 | return rval; | |
235 | } | |
236 | ||
384f3ced BN |
237 | /* |
238 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
239 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
240 | */ | |
241 | int | |
242 | xfs_dir_cilookup_result( | |
243 | struct xfs_da_args *args, | |
a3380ae3 | 244 | const unsigned char *name, |
384f3ced BN |
245 | int len) |
246 | { | |
247 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
248 | return ENOENT; | |
249 | if (args->cmpresult != XFS_CMP_CASE || | |
250 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
251 | return EEXIST; | |
252 | ||
3f52c2f0 | 253 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
384f3ced BN |
254 | if (!args->value) |
255 | return ENOMEM; | |
256 | ||
257 | memcpy(args->value, name, len); | |
258 | args->valuelen = len; | |
259 | return EEXIST; | |
260 | } | |
261 | ||
1da177e4 LT |
262 | /* |
263 | * Lookup a name in a directory, give back the inode number. | |
384f3ced BN |
264 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
265 | * to name, or ci_name->name is set to NULL for an exact match. | |
1da177e4 | 266 | */ |
384f3ced | 267 | |
f6c2d1fa NS |
268 | int |
269 | xfs_dir_lookup( | |
270 | xfs_trans_t *tp, | |
271 | xfs_inode_t *dp, | |
556b8b16 | 272 | struct xfs_name *name, |
384f3ced BN |
273 | xfs_ino_t *inum, /* out: inode number */ |
274 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
1da177e4 | 275 | { |
f6c2d1fa NS |
276 | xfs_da_args_t args; |
277 | int rval; | |
1da177e4 LT |
278 | int v; /* type-checking value */ |
279 | ||
abbede1b | 280 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 LT |
281 | XFS_STATS_INC(xs_dir_lookup); |
282 | ||
87affd08 | 283 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
284 | args.name = name->name; |
285 | args.namelen = name->len; | |
5163f95a | 286 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 | 287 | args.dp = dp; |
1da177e4 LT |
288 | args.whichfork = XFS_DATA_FORK; |
289 | args.trans = tp; | |
6a178100 | 290 | args.op_flags = XFS_DA_OP_OKNOENT; |
384f3ced BN |
291 | if (ci_name) |
292 | args.op_flags |= XFS_DA_OP_CILOOKUP; | |
f6c2d1fa | 293 | |
1da177e4 LT |
294 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
295 | rval = xfs_dir2_sf_lookup(&args); | |
f6c2d1fa | 296 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 297 | return rval; |
f6c2d1fa | 298 | else if (v) |
1da177e4 | 299 | rval = xfs_dir2_block_lookup(&args); |
f6c2d1fa | 300 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 301 | return rval; |
f6c2d1fa | 302 | else if (v) |
1da177e4 LT |
303 | rval = xfs_dir2_leaf_lookup(&args); |
304 | else | |
305 | rval = xfs_dir2_node_lookup(&args); | |
306 | if (rval == EEXIST) | |
307 | rval = 0; | |
384f3ced | 308 | if (!rval) { |
1da177e4 | 309 | *inum = args.inumber; |
384f3ced BN |
310 | if (ci_name) { |
311 | ci_name->name = args.value; | |
312 | ci_name->len = args.valuelen; | |
313 | } | |
314 | } | |
1da177e4 LT |
315 | return rval; |
316 | } | |
317 | ||
318 | /* | |
319 | * Remove an entry from a directory. | |
320 | */ | |
f6c2d1fa NS |
321 | int |
322 | xfs_dir_removename( | |
323 | xfs_trans_t *tp, | |
324 | xfs_inode_t *dp, | |
556b8b16 | 325 | struct xfs_name *name, |
f6c2d1fa | 326 | xfs_ino_t ino, |
1da177e4 LT |
327 | xfs_fsblock_t *first, /* bmap's firstblock */ |
328 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
329 | xfs_extlen_t total) /* bmap's total block count */ | |
330 | { | |
f6c2d1fa NS |
331 | xfs_da_args_t args; |
332 | int rval; | |
1da177e4 LT |
333 | int v; /* type-checking value */ |
334 | ||
abbede1b | 335 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 336 | XFS_STATS_INC(xs_dir_remove); |
f6c2d1fa | 337 | |
87affd08 | 338 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
339 | args.name = name->name; |
340 | args.namelen = name->len; | |
5163f95a | 341 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
342 | args.inumber = ino; |
343 | args.dp = dp; | |
344 | args.firstblock = first; | |
345 | args.flist = flist; | |
346 | args.total = total; | |
347 | args.whichfork = XFS_DATA_FORK; | |
348 | args.trans = tp; | |
f6c2d1fa | 349 | |
1da177e4 LT |
350 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
351 | rval = xfs_dir2_sf_removename(&args); | |
f6c2d1fa | 352 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 353 | return rval; |
f6c2d1fa | 354 | else if (v) |
1da177e4 | 355 | rval = xfs_dir2_block_removename(&args); |
f6c2d1fa | 356 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 357 | return rval; |
f6c2d1fa | 358 | else if (v) |
1da177e4 LT |
359 | rval = xfs_dir2_leaf_removename(&args); |
360 | else | |
361 | rval = xfs_dir2_node_removename(&args); | |
362 | return rval; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Read a directory. | |
367 | */ | |
f6c2d1fa | 368 | int |
051e7cd4 | 369 | xfs_readdir( |
993386c1 | 370 | xfs_inode_t *dp, |
b8227554 AV |
371 | struct dir_context *ctx, |
372 | size_t bufsize) | |
1da177e4 | 373 | { |
1da177e4 LT |
374 | int rval; /* return value */ |
375 | int v; /* type-checking value */ | |
376 | ||
cca28fb8 | 377 | trace_xfs_readdir(dp); |
051e7cd4 CH |
378 | |
379 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
380 | return XFS_ERROR(EIO); | |
381 | ||
abbede1b | 382 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 383 | XFS_STATS_INC(xs_dir_getdents); |
1da177e4 | 384 | |
1da177e4 | 385 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
b8227554 | 386 | rval = xfs_dir2_sf_getdents(dp, ctx); |
051e7cd4 | 387 | else if ((rval = xfs_dir2_isblock(NULL, dp, &v))) |
1da177e4 | 388 | ; |
f6c2d1fa | 389 | else if (v) |
b8227554 | 390 | rval = xfs_dir2_block_getdents(dp, ctx); |
1da177e4 | 391 | else |
b8227554 | 392 | rval = xfs_dir2_leaf_getdents(dp, ctx, bufsize); |
1da177e4 LT |
393 | return rval; |
394 | } | |
395 | ||
396 | /* | |
397 | * Replace the inode number of a directory entry. | |
398 | */ | |
f6c2d1fa NS |
399 | int |
400 | xfs_dir_replace( | |
401 | xfs_trans_t *tp, | |
402 | xfs_inode_t *dp, | |
556b8b16 | 403 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
404 | xfs_ino_t inum, /* new inode number */ |
405 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
406 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
407 | xfs_extlen_t total) /* bmap's total block count */ | |
408 | { | |
f6c2d1fa NS |
409 | xfs_da_args_t args; |
410 | int rval; | |
1da177e4 LT |
411 | int v; /* type-checking value */ |
412 | ||
abbede1b | 413 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
1da177e4 | 414 | |
f6c2d1fa | 415 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 416 | return rval; |
f6c2d1fa | 417 | |
87affd08 | 418 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
419 | args.name = name->name; |
420 | args.namelen = name->len; | |
5163f95a | 421 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 LT |
422 | args.inumber = inum; |
423 | args.dp = dp; | |
424 | args.firstblock = first; | |
425 | args.flist = flist; | |
426 | args.total = total; | |
427 | args.whichfork = XFS_DATA_FORK; | |
428 | args.trans = tp; | |
f6c2d1fa | 429 | |
1da177e4 LT |
430 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
431 | rval = xfs_dir2_sf_replace(&args); | |
f6c2d1fa | 432 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 433 | return rval; |
f6c2d1fa | 434 | else if (v) |
1da177e4 | 435 | rval = xfs_dir2_block_replace(&args); |
f6c2d1fa | 436 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 437 | return rval; |
f6c2d1fa | 438 | else if (v) |
1da177e4 LT |
439 | rval = xfs_dir2_leaf_replace(&args); |
440 | else | |
441 | rval = xfs_dir2_node_replace(&args); | |
442 | return rval; | |
443 | } | |
444 | ||
445 | /* | |
446 | * See if this entry can be added to the directory without allocating space. | |
556b8b16 | 447 | * First checks that the caller couldn't reserve enough space (resblks = 0). |
1da177e4 | 448 | */ |
f6c2d1fa NS |
449 | int |
450 | xfs_dir_canenter( | |
451 | xfs_trans_t *tp, | |
452 | xfs_inode_t *dp, | |
556b8b16 BN |
453 | struct xfs_name *name, /* name of entry to add */ |
454 | uint resblks) | |
1da177e4 | 455 | { |
f6c2d1fa NS |
456 | xfs_da_args_t args; |
457 | int rval; | |
1da177e4 LT |
458 | int v; /* type-checking value */ |
459 | ||
556b8b16 BN |
460 | if (resblks) |
461 | return 0; | |
462 | ||
abbede1b | 463 | ASSERT(S_ISDIR(dp->i_d.di_mode)); |
f6c2d1fa | 464 | |
87affd08 | 465 | memset(&args, 0, sizeof(xfs_da_args_t)); |
556b8b16 BN |
466 | args.name = name->name; |
467 | args.namelen = name->len; | |
5163f95a | 468 | args.hashval = dp->i_mount->m_dirnameops->hashname(name); |
1da177e4 | 469 | args.dp = dp; |
1da177e4 LT |
470 | args.whichfork = XFS_DATA_FORK; |
471 | args.trans = tp; | |
6a178100 BN |
472 | args.op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME | |
473 | XFS_DA_OP_OKNOENT; | |
f6c2d1fa | 474 | |
1da177e4 LT |
475 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
476 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 477 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 478 | return rval; |
f6c2d1fa | 479 | else if (v) |
1da177e4 | 480 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 481 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 482 | return rval; |
f6c2d1fa | 483 | else if (v) |
1da177e4 LT |
484 | rval = xfs_dir2_leaf_addname(&args); |
485 | else | |
486 | rval = xfs_dir2_node_addname(&args); | |
487 | return rval; | |
488 | } | |
489 | ||
1da177e4 LT |
490 | /* |
491 | * Utility routines. | |
492 | */ | |
493 | ||
494 | /* | |
495 | * Add a block to the directory. | |
77936d02 CH |
496 | * |
497 | * This routine is for data and free blocks, not leaf/node blocks which are | |
498 | * handled by xfs_da_grow_inode. | |
1da177e4 | 499 | */ |
f6c2d1fa | 500 | int |
1da177e4 | 501 | xfs_dir2_grow_inode( |
77936d02 CH |
502 | struct xfs_da_args *args, |
503 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
504 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
1da177e4 | 505 | { |
77936d02 CH |
506 | struct xfs_inode *dp = args->dp; |
507 | struct xfs_mount *mp = dp->i_mount; | |
508 | xfs_fileoff_t bno; /* directory offset of new block */ | |
509 | int count; /* count of filesystem blocks */ | |
510 | int error; | |
1da177e4 | 511 | |
0b1b213f CH |
512 | trace_xfs_dir2_grow_inode(args, space); |
513 | ||
1da177e4 LT |
514 | /* |
515 | * Set lowest possible block in the space requested. | |
516 | */ | |
517 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
518 | count = mp->m_dirblkfsbs; | |
77936d02 CH |
519 | |
520 | error = xfs_da_grow_inode_int(args, &bno, count); | |
521 | if (error) | |
1da177e4 | 522 | return error; |
a7444053 | 523 | |
bbaaf538 | 524 | *dbp = xfs_dir2_da_to_db(mp, (xfs_dablk_t)bno); |
a7444053 | 525 | |
1da177e4 LT |
526 | /* |
527 | * Update file's size if this is the data space and it grew. | |
528 | */ | |
529 | if (space == XFS_DIR2_DATA_SPACE) { | |
530 | xfs_fsize_t size; /* directory file (data) size */ | |
531 | ||
532 | size = XFS_FSB_TO_B(mp, bno + count); | |
533 | if (size > dp->i_d.di_size) { | |
534 | dp->i_d.di_size = size; | |
77936d02 | 535 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
1da177e4 LT |
536 | } |
537 | } | |
538 | return 0; | |
539 | } | |
540 | ||
541 | /* | |
542 | * See if the directory is a single-block form directory. | |
543 | */ | |
f6c2d1fa | 544 | int |
1da177e4 | 545 | xfs_dir2_isblock( |
f6c2d1fa NS |
546 | xfs_trans_t *tp, |
547 | xfs_inode_t *dp, | |
1da177e4 LT |
548 | int *vp) /* out: 1 is block, 0 is not block */ |
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 | rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize; |
558 | ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize); | |
559 | *vp = rval; | |
560 | return 0; | |
561 | } | |
562 | ||
563 | /* | |
564 | * See if the directory is a single-leaf form directory. | |
565 | */ | |
f6c2d1fa | 566 | int |
1da177e4 | 567 | xfs_dir2_isleaf( |
f6c2d1fa NS |
568 | xfs_trans_t *tp, |
569 | xfs_inode_t *dp, | |
1da177e4 LT |
570 | int *vp) /* out: 1 is leaf, 0 is not leaf */ |
571 | { | |
572 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
573 | xfs_mount_t *mp; |
574 | int rval; | |
1da177e4 LT |
575 | |
576 | mp = dp->i_mount; | |
f6c2d1fa | 577 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 578 | return rval; |
1da177e4 LT |
579 | *vp = last == mp->m_dirleafblk + (1 << mp->m_sb.sb_dirblklog); |
580 | return 0; | |
581 | } | |
582 | ||
1da177e4 LT |
583 | /* |
584 | * Remove the given block from the directory. | |
585 | * This routine is used for data and free blocks, leaf/node are done | |
586 | * by xfs_da_shrink_inode. | |
587 | */ | |
588 | int | |
589 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
590 | xfs_da_args_t *args, |
591 | xfs_dir2_db_t db, | |
1d9025e5 | 592 | struct xfs_buf *bp) |
1da177e4 LT |
593 | { |
594 | xfs_fileoff_t bno; /* directory file offset */ | |
595 | xfs_dablk_t da; /* directory file offset */ | |
596 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
597 | xfs_inode_t *dp; |
598 | int error; | |
599 | xfs_mount_t *mp; | |
600 | xfs_trans_t *tp; | |
1da177e4 | 601 | |
0b1b213f CH |
602 | trace_xfs_dir2_shrink_inode(args, db); |
603 | ||
1da177e4 LT |
604 | dp = args->dp; |
605 | mp = dp->i_mount; | |
606 | tp = args->trans; | |
bbaaf538 | 607 | da = xfs_dir2_db_to_da(mp, db); |
1da177e4 LT |
608 | /* |
609 | * Unmap the fsblock(s). | |
610 | */ | |
611 | if ((error = xfs_bunmapi(tp, dp, da, mp->m_dirblkfsbs, | |
612 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, | |
b4e9181e | 613 | &done))) { |
1da177e4 LT |
614 | /* |
615 | * ENOSPC actually can happen if we're in a removename with | |
616 | * no space reservation, and the resulting block removal | |
617 | * would cause a bmap btree split or conversion from extents | |
618 | * to btree. This can only happen for un-fragmented | |
619 | * directory blocks, since you need to be punching out | |
620 | * the middle of an extent. | |
621 | * In this case we need to leave the block in the file, | |
622 | * and not binval it. | |
623 | * So the block has to be in a consistent empty state | |
624 | * and appropriately logged. | |
625 | * We don't free up the buffer, the caller can tell it | |
626 | * hasn't happened since it got an error back. | |
627 | */ | |
628 | return error; | |
629 | } | |
630 | ASSERT(done); | |
631 | /* | |
632 | * Invalidate the buffer from the transaction. | |
633 | */ | |
1d9025e5 | 634 | xfs_trans_binval(tp, bp); |
1da177e4 LT |
635 | /* |
636 | * If it's not a data block, we're done. | |
637 | */ | |
638 | if (db >= XFS_DIR2_LEAF_FIRSTDB(mp)) | |
639 | return 0; | |
640 | /* | |
641 | * If the block isn't the last one in the directory, we're done. | |
642 | */ | |
bbaaf538 | 643 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(mp, db + 1, 0)) |
1da177e4 LT |
644 | return 0; |
645 | bno = da; | |
646 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
647 | /* | |
648 | * This can't really happen unless there's kernel corruption. | |
649 | */ | |
650 | return error; | |
651 | } | |
652 | if (db == mp->m_dirdatablk) | |
653 | ASSERT(bno == 0); | |
654 | else | |
655 | ASSERT(bno > 0); | |
656 | /* | |
657 | * Set the size to the new last block. | |
658 | */ | |
659 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
660 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
661 | return 0; | |
662 | } |