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" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_dir2.h" |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_mount.h" | |
a844f451 | 30 | #include "xfs_da_btree.h" |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_dir2_sf.h" |
a844f451 | 34 | #include "xfs_attr_sf.h" |
1da177e4 | 35 | #include "xfs_dinode.h" |
1da177e4 | 36 | #include "xfs_inode.h" |
a844f451 | 37 | #include "xfs_inode_item.h" |
1da177e4 | 38 | #include "xfs_bmap.h" |
1da177e4 LT |
39 | #include "xfs_dir2_data.h" |
40 | #include "xfs_dir2_leaf.h" | |
41 | #include "xfs_dir2_block.h" | |
42 | #include "xfs_dir2_node.h" | |
43 | #include "xfs_dir2_trace.h" | |
44 | #include "xfs_error.h" | |
a8272ce0 | 45 | #include "xfs_vnodeops.h" |
1da177e4 | 46 | |
556b8b16 | 47 | struct xfs_name xfs_name_dotdot = {"..", 2}; |
1da177e4 | 48 | |
f6c2d1fa NS |
49 | void |
50 | xfs_dir_mount( | |
51 | xfs_mount_t *mp) | |
1da177e4 | 52 | { |
62118709 | 53 | ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb)); |
1da177e4 LT |
54 | ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <= |
55 | XFS_MAX_BLOCKSIZE); | |
56 | mp->m_dirblksize = 1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog); | |
57 | mp->m_dirblkfsbs = 1 << mp->m_sb.sb_dirblklog; | |
bbaaf538 CH |
58 | mp->m_dirdatablk = xfs_dir2_db_to_da(mp, XFS_DIR2_DATA_FIRSTDB(mp)); |
59 | mp->m_dirleafblk = xfs_dir2_db_to_da(mp, XFS_DIR2_LEAF_FIRSTDB(mp)); | |
60 | mp->m_dirfreeblk = xfs_dir2_db_to_da(mp, XFS_DIR2_FREE_FIRSTDB(mp)); | |
1da177e4 LT |
61 | mp->m_attr_node_ents = |
62 | (mp->m_sb.sb_blocksize - (uint)sizeof(xfs_da_node_hdr_t)) / | |
63 | (uint)sizeof(xfs_da_node_entry_t); | |
64 | mp->m_dir_node_ents = | |
65 | (mp->m_dirblksize - (uint)sizeof(xfs_da_node_hdr_t)) / | |
66 | (uint)sizeof(xfs_da_node_entry_t); | |
67 | mp->m_dir_magicpct = (mp->m_dirblksize * 37) / 100; | |
68 | } | |
69 | ||
70 | /* | |
71 | * Return 1 if directory contains only "." and "..". | |
72 | */ | |
f6c2d1fa NS |
73 | int |
74 | xfs_dir_isempty( | |
75 | xfs_inode_t *dp) | |
1da177e4 | 76 | { |
f6c2d1fa | 77 | xfs_dir2_sf_t *sfp; |
1da177e4 LT |
78 | |
79 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); | |
f6c2d1fa | 80 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
1da177e4 | 81 | return 1; |
1da177e4 LT |
82 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
83 | return 0; | |
84 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
85 | return !sfp->hdr.count; | |
86 | } | |
87 | ||
f6c2d1fa NS |
88 | /* |
89 | * Validate a given inode number. | |
90 | */ | |
91 | int | |
92 | xfs_dir_ino_validate( | |
93 | xfs_mount_t *mp, | |
94 | xfs_ino_t ino) | |
95 | { | |
96 | xfs_agblock_t agblkno; | |
97 | xfs_agino_t agino; | |
98 | xfs_agnumber_t agno; | |
99 | int ino_ok; | |
100 | int ioff; | |
101 | ||
102 | agno = XFS_INO_TO_AGNO(mp, ino); | |
103 | agblkno = XFS_INO_TO_AGBNO(mp, ino); | |
104 | ioff = XFS_INO_TO_OFFSET(mp, ino); | |
105 | agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff); | |
106 | ino_ok = | |
107 | agno < mp->m_sb.sb_agcount && | |
108 | agblkno < mp->m_sb.sb_agblocks && | |
109 | agblkno != 0 && | |
110 | ioff < (1 << mp->m_sb.sb_inopblog) && | |
111 | XFS_AGINO_TO_INO(mp, agno, agino) == ino; | |
112 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE, | |
113 | XFS_RANDOM_DIR_INO_VALIDATE))) { | |
114 | xfs_fs_cmn_err(CE_WARN, mp, "Invalid inode number 0x%Lx", | |
115 | (unsigned long long) ino); | |
116 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
117 | return XFS_ERROR(EFSCORRUPTED); | |
118 | } | |
119 | return 0; | |
120 | } | |
121 | ||
1da177e4 LT |
122 | /* |
123 | * Initialize a directory with its "." and ".." entries. | |
124 | */ | |
f6c2d1fa NS |
125 | int |
126 | xfs_dir_init( | |
127 | xfs_trans_t *tp, | |
128 | xfs_inode_t *dp, | |
129 | xfs_inode_t *pdp) | |
1da177e4 | 130 | { |
f6c2d1fa NS |
131 | xfs_da_args_t args; |
132 | int error; | |
1da177e4 LT |
133 | |
134 | memset((char *)&args, 0, sizeof(args)); | |
135 | args.dp = dp; | |
136 | args.trans = tp; | |
137 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); | |
f6c2d1fa | 138 | if ((error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino))) |
1da177e4 | 139 | return error; |
1da177e4 LT |
140 | return xfs_dir2_sf_create(&args, pdp->i_ino); |
141 | } | |
142 | ||
143 | /* | |
144 | Enter a name in a directory. | |
145 | */ | |
f6c2d1fa NS |
146 | int |
147 | xfs_dir_createname( | |
148 | xfs_trans_t *tp, | |
149 | xfs_inode_t *dp, | |
556b8b16 | 150 | struct xfs_name *name, |
1da177e4 LT |
151 | xfs_ino_t inum, /* new entry inode number */ |
152 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
153 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
154 | xfs_extlen_t total) /* bmap's total block count */ | |
155 | { | |
f6c2d1fa NS |
156 | xfs_da_args_t args; |
157 | int rval; | |
1da177e4 LT |
158 | int v; /* type-checking value */ |
159 | ||
160 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); | |
f6c2d1fa | 161 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 162 | return rval; |
1da177e4 | 163 | XFS_STATS_INC(xs_dir_create); |
f6c2d1fa | 164 | |
556b8b16 BN |
165 | args.name = name->name; |
166 | args.namelen = name->len; | |
167 | args.hashval = xfs_da_hashname(name->name, name->len); | |
1da177e4 LT |
168 | args.inumber = inum; |
169 | args.dp = dp; | |
170 | args.firstblock = first; | |
171 | args.flist = flist; | |
172 | args.total = total; | |
173 | args.whichfork = XFS_DATA_FORK; | |
174 | args.trans = tp; | |
175 | args.justcheck = 0; | |
176 | args.addname = args.oknoent = 1; | |
f6c2d1fa | 177 | |
1da177e4 LT |
178 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
179 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 180 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 181 | return rval; |
f6c2d1fa | 182 | else if (v) |
1da177e4 | 183 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 184 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 185 | return rval; |
f6c2d1fa | 186 | else if (v) |
1da177e4 LT |
187 | rval = xfs_dir2_leaf_addname(&args); |
188 | else | |
189 | rval = xfs_dir2_node_addname(&args); | |
190 | return rval; | |
191 | } | |
192 | ||
193 | /* | |
194 | * Lookup a name in a directory, give back the inode number. | |
195 | */ | |
f6c2d1fa NS |
196 | int |
197 | xfs_dir_lookup( | |
198 | xfs_trans_t *tp, | |
199 | xfs_inode_t *dp, | |
556b8b16 | 200 | struct xfs_name *name, |
1da177e4 LT |
201 | xfs_ino_t *inum) /* out: inode number */ |
202 | { | |
f6c2d1fa NS |
203 | xfs_da_args_t args; |
204 | int rval; | |
1da177e4 LT |
205 | int v; /* type-checking value */ |
206 | ||
207 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); | |
208 | XFS_STATS_INC(xs_dir_lookup); | |
556b8b16 | 209 | memset(&args, 0, sizeof(xfs_da_args_t)); |
1da177e4 | 210 | |
556b8b16 BN |
211 | args.name = name->name; |
212 | args.namelen = name->len; | |
213 | args.hashval = xfs_da_hashname(name->name, name->len); | |
1da177e4 | 214 | args.dp = dp; |
1da177e4 LT |
215 | args.whichfork = XFS_DATA_FORK; |
216 | args.trans = tp; | |
1da177e4 | 217 | args.oknoent = 1; |
f6c2d1fa | 218 | |
1da177e4 LT |
219 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
220 | rval = xfs_dir2_sf_lookup(&args); | |
f6c2d1fa | 221 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 222 | return rval; |
f6c2d1fa | 223 | else if (v) |
1da177e4 | 224 | rval = xfs_dir2_block_lookup(&args); |
f6c2d1fa | 225 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 226 | return rval; |
f6c2d1fa | 227 | else if (v) |
1da177e4 LT |
228 | rval = xfs_dir2_leaf_lookup(&args); |
229 | else | |
230 | rval = xfs_dir2_node_lookup(&args); | |
231 | if (rval == EEXIST) | |
232 | rval = 0; | |
233 | if (rval == 0) | |
234 | *inum = args.inumber; | |
235 | return rval; | |
236 | } | |
237 | ||
238 | /* | |
239 | * Remove an entry from a directory. | |
240 | */ | |
f6c2d1fa NS |
241 | int |
242 | xfs_dir_removename( | |
243 | xfs_trans_t *tp, | |
244 | xfs_inode_t *dp, | |
556b8b16 | 245 | struct xfs_name *name, |
f6c2d1fa | 246 | xfs_ino_t ino, |
1da177e4 LT |
247 | xfs_fsblock_t *first, /* bmap's firstblock */ |
248 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
249 | xfs_extlen_t total) /* bmap's total block count */ | |
250 | { | |
f6c2d1fa NS |
251 | xfs_da_args_t args; |
252 | int rval; | |
1da177e4 LT |
253 | int v; /* type-checking value */ |
254 | ||
255 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); | |
256 | XFS_STATS_INC(xs_dir_remove); | |
f6c2d1fa | 257 | |
556b8b16 BN |
258 | args.name = name->name; |
259 | args.namelen = name->len; | |
260 | args.hashval = xfs_da_hashname(name->name, name->len); | |
1da177e4 LT |
261 | args.inumber = ino; |
262 | args.dp = dp; | |
263 | args.firstblock = first; | |
264 | args.flist = flist; | |
265 | args.total = total; | |
266 | args.whichfork = XFS_DATA_FORK; | |
267 | args.trans = tp; | |
268 | args.justcheck = args.addname = args.oknoent = 0; | |
f6c2d1fa | 269 | |
1da177e4 LT |
270 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
271 | rval = xfs_dir2_sf_removename(&args); | |
f6c2d1fa | 272 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 273 | return rval; |
f6c2d1fa | 274 | else if (v) |
1da177e4 | 275 | rval = xfs_dir2_block_removename(&args); |
f6c2d1fa | 276 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 277 | return rval; |
f6c2d1fa | 278 | else if (v) |
1da177e4 LT |
279 | rval = xfs_dir2_leaf_removename(&args); |
280 | else | |
281 | rval = xfs_dir2_node_removename(&args); | |
282 | return rval; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Read a directory. | |
287 | */ | |
f6c2d1fa | 288 | int |
051e7cd4 | 289 | xfs_readdir( |
993386c1 | 290 | xfs_inode_t *dp, |
051e7cd4 CH |
291 | void *dirent, |
292 | size_t bufsize, | |
293 | xfs_off_t *offset, | |
294 | filldir_t filldir) | |
1da177e4 | 295 | { |
1da177e4 LT |
296 | int rval; /* return value */ |
297 | int v; /* type-checking value */ | |
298 | ||
cf441eeb | 299 | xfs_itrace_entry(dp); |
051e7cd4 CH |
300 | |
301 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
302 | return XFS_ERROR(EIO); | |
303 | ||
1da177e4 LT |
304 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
305 | XFS_STATS_INC(xs_dir_getdents); | |
1da177e4 | 306 | |
1da177e4 | 307 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
051e7cd4 CH |
308 | rval = xfs_dir2_sf_getdents(dp, dirent, offset, filldir); |
309 | else if ((rval = xfs_dir2_isblock(NULL, dp, &v))) | |
1da177e4 | 310 | ; |
f6c2d1fa | 311 | else if (v) |
051e7cd4 | 312 | rval = xfs_dir2_block_getdents(dp, dirent, offset, filldir); |
1da177e4 | 313 | else |
051e7cd4 CH |
314 | rval = xfs_dir2_leaf_getdents(dp, dirent, bufsize, offset, |
315 | filldir); | |
1da177e4 LT |
316 | return rval; |
317 | } | |
318 | ||
319 | /* | |
320 | * Replace the inode number of a directory entry. | |
321 | */ | |
f6c2d1fa NS |
322 | int |
323 | xfs_dir_replace( | |
324 | xfs_trans_t *tp, | |
325 | xfs_inode_t *dp, | |
556b8b16 | 326 | struct xfs_name *name, /* name of entry to replace */ |
1da177e4 LT |
327 | xfs_ino_t inum, /* new inode number */ |
328 | xfs_fsblock_t *first, /* bmap's firstblock */ | |
329 | xfs_bmap_free_t *flist, /* bmap's freeblock list */ | |
330 | xfs_extlen_t total) /* bmap's total block count */ | |
331 | { | |
f6c2d1fa NS |
332 | xfs_da_args_t args; |
333 | int rval; | |
1da177e4 LT |
334 | int v; /* type-checking value */ |
335 | ||
336 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); | |
337 | ||
f6c2d1fa | 338 | if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) |
1da177e4 | 339 | return rval; |
f6c2d1fa | 340 | |
556b8b16 BN |
341 | args.name = name->name; |
342 | args.namelen = name->len; | |
343 | args.hashval = xfs_da_hashname(name->name, name->len); | |
1da177e4 LT |
344 | args.inumber = inum; |
345 | args.dp = dp; | |
346 | args.firstblock = first; | |
347 | args.flist = flist; | |
348 | args.total = total; | |
349 | args.whichfork = XFS_DATA_FORK; | |
350 | args.trans = tp; | |
351 | args.justcheck = args.addname = args.oknoent = 0; | |
f6c2d1fa | 352 | |
1da177e4 LT |
353 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
354 | rval = xfs_dir2_sf_replace(&args); | |
f6c2d1fa | 355 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 356 | return rval; |
f6c2d1fa | 357 | else if (v) |
1da177e4 | 358 | rval = xfs_dir2_block_replace(&args); |
f6c2d1fa | 359 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 360 | return rval; |
f6c2d1fa | 361 | else if (v) |
1da177e4 LT |
362 | rval = xfs_dir2_leaf_replace(&args); |
363 | else | |
364 | rval = xfs_dir2_node_replace(&args); | |
365 | return rval; | |
366 | } | |
367 | ||
368 | /* | |
369 | * See if this entry can be added to the directory without allocating space. | |
556b8b16 | 370 | * First checks that the caller couldn't reserve enough space (resblks = 0). |
1da177e4 | 371 | */ |
f6c2d1fa NS |
372 | int |
373 | xfs_dir_canenter( | |
374 | xfs_trans_t *tp, | |
375 | xfs_inode_t *dp, | |
556b8b16 BN |
376 | struct xfs_name *name, /* name of entry to add */ |
377 | uint resblks) | |
1da177e4 | 378 | { |
f6c2d1fa NS |
379 | xfs_da_args_t args; |
380 | int rval; | |
1da177e4 LT |
381 | int v; /* type-checking value */ |
382 | ||
556b8b16 BN |
383 | if (resblks) |
384 | return 0; | |
385 | ||
1da177e4 | 386 | ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); |
556b8b16 | 387 | memset(&args, 0, sizeof(xfs_da_args_t)); |
f6c2d1fa | 388 | |
556b8b16 BN |
389 | args.name = name->name; |
390 | args.namelen = name->len; | |
391 | args.hashval = xfs_da_hashname(name->name, name->len); | |
1da177e4 | 392 | args.dp = dp; |
1da177e4 LT |
393 | args.whichfork = XFS_DATA_FORK; |
394 | args.trans = tp; | |
395 | args.justcheck = args.addname = args.oknoent = 1; | |
f6c2d1fa | 396 | |
1da177e4 LT |
397 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
398 | rval = xfs_dir2_sf_addname(&args); | |
f6c2d1fa | 399 | else if ((rval = xfs_dir2_isblock(tp, dp, &v))) |
1da177e4 | 400 | return rval; |
f6c2d1fa | 401 | else if (v) |
1da177e4 | 402 | rval = xfs_dir2_block_addname(&args); |
f6c2d1fa | 403 | else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) |
1da177e4 | 404 | return rval; |
f6c2d1fa | 405 | else if (v) |
1da177e4 LT |
406 | rval = xfs_dir2_leaf_addname(&args); |
407 | else | |
408 | rval = xfs_dir2_node_addname(&args); | |
409 | return rval; | |
410 | } | |
411 | ||
1da177e4 LT |
412 | /* |
413 | * Utility routines. | |
414 | */ | |
415 | ||
416 | /* | |
417 | * Add a block to the directory. | |
418 | * This routine is for data and free blocks, not leaf/node blocks | |
419 | * which are handled by xfs_da_grow_inode. | |
420 | */ | |
f6c2d1fa | 421 | int |
1da177e4 | 422 | xfs_dir2_grow_inode( |
f6c2d1fa | 423 | xfs_da_args_t *args, |
1da177e4 LT |
424 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ |
425 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
426 | { | |
427 | xfs_fileoff_t bno; /* directory offset of new block */ | |
428 | int count; /* count of filesystem blocks */ | |
429 | xfs_inode_t *dp; /* incore directory inode */ | |
f6c2d1fa | 430 | int error; |
1da177e4 | 431 | int got; /* blocks actually mapped */ |
f6c2d1fa | 432 | int i; |
1da177e4 LT |
433 | xfs_bmbt_irec_t map; /* single structure for bmap */ |
434 | int mapi; /* mapping index */ | |
435 | xfs_bmbt_irec_t *mapp; /* bmap mapping structure(s) */ | |
f6c2d1fa | 436 | xfs_mount_t *mp; |
1da177e4 | 437 | int nmap; /* number of bmap entries */ |
f6c2d1fa | 438 | xfs_trans_t *tp; |
1da177e4 LT |
439 | |
440 | xfs_dir2_trace_args_s("grow_inode", args, space); | |
441 | dp = args->dp; | |
442 | tp = args->trans; | |
443 | mp = dp->i_mount; | |
444 | /* | |
445 | * Set lowest possible block in the space requested. | |
446 | */ | |
447 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
448 | count = mp->m_dirblkfsbs; | |
449 | /* | |
450 | * Find the first hole for our block. | |
451 | */ | |
f6c2d1fa | 452 | if ((error = xfs_bmap_first_unused(tp, dp, count, &bno, XFS_DATA_FORK))) |
1da177e4 | 453 | return error; |
1da177e4 LT |
454 | nmap = 1; |
455 | ASSERT(args->firstblock != NULL); | |
456 | /* | |
457 | * Try mapping the new block contiguously (one extent). | |
458 | */ | |
459 | if ((error = xfs_bmapi(tp, dp, bno, count, | |
460 | XFS_BMAPI_WRITE|XFS_BMAPI_METADATA|XFS_BMAPI_CONTIG, | |
461 | args->firstblock, args->total, &map, &nmap, | |
f6c2d1fa | 462 | args->flist, NULL))) |
1da177e4 | 463 | return error; |
1da177e4 | 464 | ASSERT(nmap <= 1); |
1da177e4 LT |
465 | if (nmap == 1) { |
466 | mapp = ↦ | |
467 | mapi = 1; | |
468 | } | |
469 | /* | |
470 | * Didn't work and this is a multiple-fsb directory block. | |
471 | * Try again with contiguous flag turned on. | |
472 | */ | |
473 | else if (nmap == 0 && count > 1) { | |
474 | xfs_fileoff_t b; /* current file offset */ | |
475 | ||
476 | /* | |
477 | * Space for maximum number of mappings. | |
478 | */ | |
479 | mapp = kmem_alloc(sizeof(*mapp) * count, KM_SLEEP); | |
480 | /* | |
481 | * Iterate until we get to the end of our block. | |
482 | */ | |
483 | for (b = bno, mapi = 0; b < bno + count; ) { | |
484 | int c; /* current fsb count */ | |
485 | ||
486 | /* | |
487 | * Can't map more than MAX_NMAP at once. | |
488 | */ | |
489 | nmap = MIN(XFS_BMAP_MAX_NMAP, count); | |
490 | c = (int)(bno + count - b); | |
491 | if ((error = xfs_bmapi(tp, dp, b, c, | |
492 | XFS_BMAPI_WRITE|XFS_BMAPI_METADATA, | |
493 | args->firstblock, args->total, | |
3e57ecf6 OW |
494 | &mapp[mapi], &nmap, args->flist, |
495 | NULL))) { | |
f0e2d93c | 496 | kmem_free(mapp); |
1da177e4 LT |
497 | return error; |
498 | } | |
499 | if (nmap < 1) | |
500 | break; | |
501 | /* | |
502 | * Add this bunch into our table, go to the next offset. | |
503 | */ | |
504 | mapi += nmap; | |
505 | b = mapp[mapi - 1].br_startoff + | |
506 | mapp[mapi - 1].br_blockcount; | |
507 | } | |
508 | } | |
509 | /* | |
510 | * Didn't work. | |
511 | */ | |
512 | else { | |
513 | mapi = 0; | |
514 | mapp = NULL; | |
515 | } | |
516 | /* | |
517 | * See how many fsb's we got. | |
518 | */ | |
519 | for (i = 0, got = 0; i < mapi; i++) | |
520 | got += mapp[i].br_blockcount; | |
521 | /* | |
522 | * Didn't get enough fsb's, or the first/last block's are wrong. | |
523 | */ | |
524 | if (got != count || mapp[0].br_startoff != bno || | |
525 | mapp[mapi - 1].br_startoff + mapp[mapi - 1].br_blockcount != | |
526 | bno + count) { | |
527 | if (mapp != &map) | |
f0e2d93c | 528 | kmem_free(mapp); |
1da177e4 LT |
529 | return XFS_ERROR(ENOSPC); |
530 | } | |
531 | /* | |
532 | * Done with the temporary mapping table. | |
533 | */ | |
534 | if (mapp != &map) | |
f0e2d93c | 535 | kmem_free(mapp); |
bbaaf538 | 536 | *dbp = xfs_dir2_da_to_db(mp, (xfs_dablk_t)bno); |
1da177e4 LT |
537 | /* |
538 | * Update file's size if this is the data space and it grew. | |
539 | */ | |
540 | if (space == XFS_DIR2_DATA_SPACE) { | |
541 | xfs_fsize_t size; /* directory file (data) size */ | |
542 | ||
543 | size = XFS_FSB_TO_B(mp, bno + count); | |
544 | if (size > dp->i_d.di_size) { | |
545 | dp->i_d.di_size = size; | |
546 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
547 | } | |
548 | } | |
549 | return 0; | |
550 | } | |
551 | ||
552 | /* | |
553 | * See if the directory is a single-block form directory. | |
554 | */ | |
f6c2d1fa | 555 | int |
1da177e4 | 556 | xfs_dir2_isblock( |
f6c2d1fa NS |
557 | xfs_trans_t *tp, |
558 | xfs_inode_t *dp, | |
1da177e4 LT |
559 | int *vp) /* out: 1 is block, 0 is not block */ |
560 | { | |
561 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
562 | xfs_mount_t *mp; |
563 | int rval; | |
1da177e4 LT |
564 | |
565 | mp = dp->i_mount; | |
f6c2d1fa | 566 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 567 | return rval; |
1da177e4 LT |
568 | rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize; |
569 | ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize); | |
570 | *vp = rval; | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /* | |
575 | * See if the directory is a single-leaf form directory. | |
576 | */ | |
f6c2d1fa | 577 | int |
1da177e4 | 578 | xfs_dir2_isleaf( |
f6c2d1fa NS |
579 | xfs_trans_t *tp, |
580 | xfs_inode_t *dp, | |
1da177e4 LT |
581 | int *vp) /* out: 1 is leaf, 0 is not leaf */ |
582 | { | |
583 | xfs_fileoff_t last; /* last file offset */ | |
f6c2d1fa NS |
584 | xfs_mount_t *mp; |
585 | int rval; | |
1da177e4 LT |
586 | |
587 | mp = dp->i_mount; | |
f6c2d1fa | 588 | if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) |
1da177e4 | 589 | return rval; |
1da177e4 LT |
590 | *vp = last == mp->m_dirleafblk + (1 << mp->m_sb.sb_dirblklog); |
591 | return 0; | |
592 | } | |
593 | ||
1da177e4 LT |
594 | /* |
595 | * Remove the given block from the directory. | |
596 | * This routine is used for data and free blocks, leaf/node are done | |
597 | * by xfs_da_shrink_inode. | |
598 | */ | |
599 | int | |
600 | xfs_dir2_shrink_inode( | |
f6c2d1fa NS |
601 | xfs_da_args_t *args, |
602 | xfs_dir2_db_t db, | |
603 | xfs_dabuf_t *bp) | |
1da177e4 LT |
604 | { |
605 | xfs_fileoff_t bno; /* directory file offset */ | |
606 | xfs_dablk_t da; /* directory file offset */ | |
607 | int done; /* bunmap is finished */ | |
f6c2d1fa NS |
608 | xfs_inode_t *dp; |
609 | int error; | |
610 | xfs_mount_t *mp; | |
611 | xfs_trans_t *tp; | |
1da177e4 LT |
612 | |
613 | xfs_dir2_trace_args_db("shrink_inode", args, db, bp); | |
614 | dp = args->dp; | |
615 | mp = dp->i_mount; | |
616 | tp = args->trans; | |
bbaaf538 | 617 | da = xfs_dir2_db_to_da(mp, db); |
1da177e4 LT |
618 | /* |
619 | * Unmap the fsblock(s). | |
620 | */ | |
621 | if ((error = xfs_bunmapi(tp, dp, da, mp->m_dirblkfsbs, | |
622 | XFS_BMAPI_METADATA, 0, args->firstblock, args->flist, | |
3e57ecf6 | 623 | NULL, &done))) { |
1da177e4 LT |
624 | /* |
625 | * ENOSPC actually can happen if we're in a removename with | |
626 | * no space reservation, and the resulting block removal | |
627 | * would cause a bmap btree split or conversion from extents | |
628 | * to btree. This can only happen for un-fragmented | |
629 | * directory blocks, since you need to be punching out | |
630 | * the middle of an extent. | |
631 | * In this case we need to leave the block in the file, | |
632 | * and not binval it. | |
633 | * So the block has to be in a consistent empty state | |
634 | * and appropriately logged. | |
635 | * We don't free up the buffer, the caller can tell it | |
636 | * hasn't happened since it got an error back. | |
637 | */ | |
638 | return error; | |
639 | } | |
640 | ASSERT(done); | |
641 | /* | |
642 | * Invalidate the buffer from the transaction. | |
643 | */ | |
644 | xfs_da_binval(tp, bp); | |
645 | /* | |
646 | * If it's not a data block, we're done. | |
647 | */ | |
648 | if (db >= XFS_DIR2_LEAF_FIRSTDB(mp)) | |
649 | return 0; | |
650 | /* | |
651 | * If the block isn't the last one in the directory, we're done. | |
652 | */ | |
bbaaf538 | 653 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(mp, db + 1, 0)) |
1da177e4 LT |
654 | return 0; |
655 | bno = da; | |
656 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { | |
657 | /* | |
658 | * This can't really happen unless there's kernel corruption. | |
659 | */ | |
660 | return error; | |
661 | } | |
662 | if (db == mp->m_dirdatablk) | |
663 | ASSERT(bno == 0); | |
664 | else | |
665 | ASSERT(bno > 0); | |
666 | /* | |
667 | * Set the size to the new last block. | |
668 | */ | |
669 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
670 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
671 | return 0; | |
672 | } |