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Commit | Line | Data |
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37b3b4d6 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2bd0ea18 | 2 | /* |
da23017d NS |
3 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. | |
2bd0ea18 | 5 | */ |
9c799827 | 6 | #include "libxfs_priv.h" |
b626fb59 DC |
7 | #include "xfs_fs.h" |
8 | #include "xfs_format.h" | |
9 | #include "xfs_log_format.h" | |
10 | #include "xfs_trans_resv.h" | |
11 | #include "xfs_mount.h" | |
f944d3d0 | 12 | #include "xfs_defer.h" |
b626fb59 DC |
13 | #include "xfs_da_format.h" |
14 | #include "xfs_da_btree.h" | |
15 | #include "xfs_inode.h" | |
16 | #include "xfs_trans.h" | |
17 | #include "xfs_bmap.h" | |
18 | #include "xfs_dir2.h" | |
19 | #include "xfs_dir2_priv.h" | |
be3bf25c | 20 | #include "xfs_ialloc.h" |
56d3fc2b | 21 | #include "xfs_errortag.h" |
b626fb59 | 22 | #include "xfs_trace.h" |
2bd0ea18 | 23 | |
494434d7 DC |
24 | struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR }; |
25 | ||
aaca101b | 26 | /* |
3297e0ca | 27 | * Convert inode mode to directory entry filetype |
aaca101b | 28 | */ |
16c101bb DW |
29 | unsigned char |
30 | xfs_mode_to_ftype( | |
31 | int mode) | |
3297e0ca AG |
32 | { |
33 | switch (mode & S_IFMT) { | |
34 | case S_IFREG: | |
35 | return XFS_DIR3_FT_REG_FILE; | |
36 | case S_IFDIR: | |
37 | return XFS_DIR3_FT_DIR; | |
38 | case S_IFCHR: | |
39 | return XFS_DIR3_FT_CHRDEV; | |
40 | case S_IFBLK: | |
41 | return XFS_DIR3_FT_BLKDEV; | |
42 | case S_IFIFO: | |
43 | return XFS_DIR3_FT_FIFO; | |
44 | case S_IFSOCK: | |
45 | return XFS_DIR3_FT_SOCK; | |
46 | case S_IFLNK: | |
47 | return XFS_DIR3_FT_SYMLINK; | |
48 | default: | |
49 | return XFS_DIR3_FT_UNKNOWN; | |
50 | } | |
51 | } | |
51ca7008 BN |
52 | |
53 | /* | |
5e656dbb BN |
54 | * ASCII case-insensitive (ie. A-Z) support for directories that was |
55 | * used in IRIX. | |
51ca7008 | 56 | */ |
5e656dbb | 57 | STATIC xfs_dahash_t |
51ca7008 | 58 | xfs_ascii_ci_hashname( |
5e656dbb | 59 | struct xfs_name *name) |
51ca7008 BN |
60 | { |
61 | xfs_dahash_t hash; | |
62 | int i; | |
63 | ||
5e656dbb BN |
64 | for (i = 0, hash = 0; i < name->len; i++) |
65 | hash = tolower(name->name[i]) ^ rol32(hash, 7); | |
51ca7008 BN |
66 | |
67 | return hash; | |
68 | } | |
69 | ||
5e656dbb | 70 | STATIC enum xfs_dacmp |
51ca7008 | 71 | xfs_ascii_ci_compname( |
5e656dbb | 72 | struct xfs_da_args *args, |
56b2de80 DC |
73 | const unsigned char *name, |
74 | int len) | |
51ca7008 BN |
75 | { |
76 | enum xfs_dacmp result; | |
77 | int i; | |
78 | ||
5e656dbb | 79 | if (args->namelen != len) |
51ca7008 BN |
80 | return XFS_CMP_DIFFERENT; |
81 | ||
82 | result = XFS_CMP_EXACT; | |
5e656dbb BN |
83 | for (i = 0; i < len; i++) { |
84 | if (args->name[i] == name[i]) | |
51ca7008 | 85 | continue; |
5e656dbb | 86 | if (tolower(args->name[i]) != tolower(name[i])) |
51ca7008 BN |
87 | return XFS_CMP_DIFFERENT; |
88 | result = XFS_CMP_CASE; | |
89 | } | |
90 | ||
91 | return result; | |
92 | } | |
93 | ||
b6b86724 | 94 | static const struct xfs_nameops xfs_ascii_ci_nameops = { |
51ca7008 BN |
95 | .hashname = xfs_ascii_ci_hashname, |
96 | .compname = xfs_ascii_ci_compname, | |
97 | }; | |
98 | ||
ff105f75 DC |
99 | int |
100 | xfs_da_mount( | |
101 | struct xfs_mount *mp) | |
2bd0ea18 | 102 | { |
ff105f75 DC |
103 | struct xfs_da_geometry *dageo; |
104 | int nodehdr_size; | |
ed59338e DC |
105 | |
106 | ||
ff105f75 | 107 | ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT); |
fdef0e8b | 108 | ASSERT(xfs_dir2_dirblock_bytes(&mp->m_sb) <= XFS_MAX_BLOCKSIZE); |
ff105f75 DC |
109 | |
110 | mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); | |
111 | mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); | |
112 | ||
113 | nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; | |
114 | mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), | |
115 | KM_SLEEP | KM_MAYFAIL); | |
116 | mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), | |
117 | KM_SLEEP | KM_MAYFAIL); | |
118 | if (!mp->m_dir_geo || !mp->m_attr_geo) { | |
119 | kmem_free(mp->m_dir_geo); | |
120 | kmem_free(mp->m_attr_geo); | |
12b53197 | 121 | return -ENOMEM; |
ff105f75 DC |
122 | } |
123 | ||
124 | /* set up directory geometry */ | |
125 | dageo = mp->m_dir_geo; | |
126 | dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog; | |
127 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
fdef0e8b | 128 | dageo->blksize = xfs_dir2_dirblock_bytes(&mp->m_sb); |
ff105f75 DC |
129 | dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog; |
130 | ||
131 | /* | |
132 | * Now we've set up the block conversion variables, we can calculate the | |
133 | * segment block constants using the geometry structure. | |
134 | */ | |
135 | dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET); | |
136 | dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET); | |
137 | dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET); | |
138 | dageo->node_ents = (dageo->blksize - nodehdr_size) / | |
ed59338e | 139 | (uint)sizeof(xfs_da_node_entry_t); |
ff105f75 DC |
140 | dageo->magicpct = (dageo->blksize * 37) / 100; |
141 | ||
142 | /* set up attribute geometry - single fsb only */ | |
143 | dageo = mp->m_attr_geo; | |
144 | dageo->blklog = mp->m_sb.sb_blocklog; | |
145 | dageo->fsblog = mp->m_sb.sb_blocklog; | |
146 | dageo->blksize = 1 << dageo->blklog; | |
147 | dageo->fsbcount = 1; | |
148 | dageo->node_ents = (dageo->blksize - nodehdr_size) / | |
ed59338e | 149 | (uint)sizeof(xfs_da_node_entry_t); |
ff105f75 | 150 | dageo->magicpct = (dageo->blksize * 37) / 100; |
ed59338e | 151 | |
51ca7008 BN |
152 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
153 | mp->m_dirnameops = &xfs_ascii_ci_nameops; | |
154 | else | |
155 | mp->m_dirnameops = &xfs_default_nameops; | |
ff105f75 DC |
156 | |
157 | return 0; | |
158 | } | |
159 | ||
160 | void | |
161 | xfs_da_unmount( | |
162 | struct xfs_mount *mp) | |
163 | { | |
164 | kmem_free(mp->m_dir_geo); | |
165 | kmem_free(mp->m_attr_geo); | |
2bd0ea18 NS |
166 | } |
167 | ||
5e656dbb BN |
168 | /* |
169 | * Return 1 if directory contains only "." and "..". | |
170 | */ | |
171 | int | |
172 | xfs_dir_isempty( | |
173 | xfs_inode_t *dp) | |
174 | { | |
a2ceac1f | 175 | xfs_dir2_sf_hdr_t *sfp; |
5e656dbb | 176 | |
e37bf53c | 177 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
5e656dbb BN |
178 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
179 | return 1; | |
180 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) | |
181 | return 0; | |
a2ceac1f DC |
182 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
183 | return !sfp->count; | |
5e656dbb BN |
184 | } |
185 | ||
186 | /* | |
187 | * Validate a given inode number. | |
188 | */ | |
189 | int | |
190 | xfs_dir_ino_validate( | |
191 | xfs_mount_t *mp, | |
192 | xfs_ino_t ino) | |
193 | { | |
be3bf25c DW |
194 | bool ino_ok = xfs_verify_dir_ino(mp, ino); |
195 | ||
e2a190dd | 196 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE))) { |
a2ceac1f | 197 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
5e656dbb BN |
198 | (unsigned long long) ino); |
199 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); | |
12b53197 | 200 | return -EFSCORRUPTED; |
5e656dbb BN |
201 | } |
202 | return 0; | |
203 | } | |
204 | ||
2bd0ea18 NS |
205 | /* |
206 | * Initialize a directory with its "." and ".." entries. | |
207 | */ | |
5e656dbb BN |
208 | int |
209 | xfs_dir_init( | |
210 | xfs_trans_t *tp, | |
211 | xfs_inode_t *dp, | |
212 | xfs_inode_t *pdp) | |
2bd0ea18 | 213 | { |
ff105f75 | 214 | struct xfs_da_args *args; |
5e656dbb | 215 | int error; |
2bd0ea18 | 216 | |
e37bf53c | 217 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
ff105f75 DC |
218 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
219 | if (error) | |
2bd0ea18 | 220 | return error; |
ff105f75 DC |
221 | |
222 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
223 | if (!args) | |
12b53197 | 224 | return -ENOMEM; |
ff105f75 DC |
225 | |
226 | args->geo = dp->i_mount->m_dir_geo; | |
227 | args->dp = dp; | |
228 | args->trans = tp; | |
229 | error = xfs_dir2_sf_create(args, pdp->i_ino); | |
230 | kmem_free(args); | |
231 | return error; | |
2bd0ea18 NS |
232 | } |
233 | ||
234 | /* | |
5a35bf2c DC |
235 | * Enter a name in a directory, or check for available space. |
236 | * If inum is 0, only the available space test is performed. | |
2bd0ea18 | 237 | */ |
5e656dbb BN |
238 | int |
239 | xfs_dir_createname( | |
a50d2ab0 BF |
240 | struct xfs_trans *tp, |
241 | struct xfs_inode *dp, | |
5e656dbb | 242 | struct xfs_name *name, |
2bd0ea18 | 243 | xfs_ino_t inum, /* new entry inode number */ |
2bd0ea18 NS |
244 | xfs_extlen_t total) /* bmap's total block count */ |
245 | { | |
ff105f75 | 246 | struct xfs_da_args *args; |
5e656dbb | 247 | int rval; |
2bd0ea18 NS |
248 | int v; /* type-checking value */ |
249 | ||
e37bf53c | 250 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
44be3822 | 251 | |
5a35bf2c DC |
252 | if (inum) { |
253 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); | |
254 | if (rval) | |
255 | return rval; | |
79896434 | 256 | XFS_STATS_INC(dp->i_mount, xs_dir_create); |
5a35bf2c | 257 | } |
5e656dbb | 258 | |
ff105f75 DC |
259 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
260 | if (!args) | |
12b53197 | 261 | return -ENOMEM; |
ff105f75 DC |
262 | |
263 | args->geo = dp->i_mount->m_dir_geo; | |
264 | args->name = name->name; | |
265 | args->namelen = name->len; | |
266 | args->filetype = name->type; | |
267 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
268 | args->inumber = inum; | |
269 | args->dp = dp; | |
ff105f75 DC |
270 | args->total = total; |
271 | args->whichfork = XFS_DATA_FORK; | |
272 | args->trans = tp; | |
273 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; | |
5a35bf2c DC |
274 | if (!inum) |
275 | args->op_flags |= XFS_DA_OP_JUSTCHECK; | |
ff105f75 DC |
276 | |
277 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
278 | rval = xfs_dir2_sf_addname(args); | |
279 | goto out_free; | |
280 | } | |
281 | ||
282 | rval = xfs_dir2_isblock(args, &v); | |
283 | if (rval) | |
284 | goto out_free; | |
285 | if (v) { | |
286 | rval = xfs_dir2_block_addname(args); | |
287 | goto out_free; | |
288 | } | |
289 | ||
290 | rval = xfs_dir2_isleaf(args, &v); | |
291 | if (rval) | |
292 | goto out_free; | |
293 | if (v) | |
294 | rval = xfs_dir2_leaf_addname(args); | |
2bd0ea18 | 295 | else |
ff105f75 DC |
296 | rval = xfs_dir2_node_addname(args); |
297 | ||
298 | out_free: | |
299 | kmem_free(args); | |
2bd0ea18 NS |
300 | return rval; |
301 | } | |
302 | ||
5e656dbb BN |
303 | /* |
304 | * If doing a CI lookup and case-insensitive match, dup actual name into | |
305 | * args.value. Return EEXIST for success (ie. name found) or an error. | |
306 | */ | |
307 | int | |
308 | xfs_dir_cilookup_result( | |
309 | struct xfs_da_args *args, | |
56b2de80 | 310 | const unsigned char *name, |
5e656dbb BN |
311 | int len) |
312 | { | |
313 | if (args->cmpresult == XFS_CMP_DIFFERENT) | |
12b53197 | 314 | return -ENOENT; |
5e656dbb BN |
315 | if (args->cmpresult != XFS_CMP_CASE || |
316 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) | |
12b53197 | 317 | return -EEXIST; |
5e656dbb | 318 | |
56b2de80 | 319 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
5e656dbb | 320 | if (!args->value) |
12b53197 | 321 | return -ENOMEM; |
5e656dbb BN |
322 | |
323 | memcpy(args->value, name, len); | |
324 | args->valuelen = len; | |
12b53197 | 325 | return -EEXIST; |
5e656dbb BN |
326 | } |
327 | ||
2bd0ea18 NS |
328 | /* |
329 | * Lookup a name in a directory, give back the inode number. | |
5e656dbb BN |
330 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
331 | * to name, or ci_name->name is set to NULL for an exact match. | |
2bd0ea18 | 332 | */ |
5e656dbb BN |
333 | |
334 | int | |
335 | xfs_dir_lookup( | |
336 | xfs_trans_t *tp, | |
337 | xfs_inode_t *dp, | |
338 | struct xfs_name *name, | |
339 | xfs_ino_t *inum, /* out: inode number */ | |
340 | struct xfs_name *ci_name) /* out: actual name if CI match */ | |
2bd0ea18 | 341 | { |
ff105f75 | 342 | struct xfs_da_args *args; |
5e656dbb | 343 | int rval; |
2bd0ea18 | 344 | int v; /* type-checking value */ |
7ebb7646 | 345 | int lock_mode; |
2bd0ea18 | 346 | |
e37bf53c | 347 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
79896434 | 348 | XFS_STATS_INC(dp->i_mount, xs_dir_lookup); |
a95cf252 | 349 | |
ff105f75 DC |
350 | /* |
351 | * We need to use KM_NOFS here so that lockdep will not throw false | |
352 | * positive deadlock warnings on a non-transactional lookup path. It is | |
353 | * safe to recurse into inode recalim in that case, but lockdep can't | |
354 | * easily be taught about it. Hence KM_NOFS avoids having to add more | |
355 | * lockdep Doing this avoids having to add a bunch of lockdep class | |
356 | * annotations into the reclaim path for the ilock. | |
357 | */ | |
358 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); | |
359 | args->geo = dp->i_mount->m_dir_geo; | |
360 | args->name = name->name; | |
361 | args->namelen = name->len; | |
362 | args->filetype = name->type; | |
363 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
364 | args->dp = dp; | |
365 | args->whichfork = XFS_DATA_FORK; | |
366 | args->trans = tp; | |
367 | args->op_flags = XFS_DA_OP_OKNOENT; | |
5e656dbb | 368 | if (ci_name) |
ff105f75 | 369 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
5e656dbb | 370 | |
7ebb7646 | 371 | lock_mode = xfs_ilock_data_map_shared(dp); |
ff105f75 DC |
372 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
373 | rval = xfs_dir2_sf_lookup(args); | |
374 | goto out_check_rval; | |
375 | } | |
376 | ||
377 | rval = xfs_dir2_isblock(args, &v); | |
378 | if (rval) | |
379 | goto out_free; | |
380 | if (v) { | |
381 | rval = xfs_dir2_block_lookup(args); | |
382 | goto out_check_rval; | |
383 | } | |
384 | ||
385 | rval = xfs_dir2_isleaf(args, &v); | |
386 | if (rval) | |
387 | goto out_free; | |
388 | if (v) | |
389 | rval = xfs_dir2_leaf_lookup(args); | |
2bd0ea18 | 390 | else |
ff105f75 DC |
391 | rval = xfs_dir2_node_lookup(args); |
392 | ||
393 | out_check_rval: | |
12b53197 | 394 | if (rval == -EEXIST) |
2bd0ea18 | 395 | rval = 0; |
5e656dbb | 396 | if (!rval) { |
ff105f75 | 397 | *inum = args->inumber; |
5e656dbb | 398 | if (ci_name) { |
ff105f75 DC |
399 | ci_name->name = args->value; |
400 | ci_name->len = args->valuelen; | |
5e656dbb BN |
401 | } |
402 | } | |
ff105f75 | 403 | out_free: |
7ebb7646 | 404 | xfs_iunlock(dp, lock_mode); |
ff105f75 | 405 | kmem_free(args); |
2bd0ea18 NS |
406 | return rval; |
407 | } | |
408 | ||
409 | /* | |
410 | * Remove an entry from a directory. | |
411 | */ | |
5e656dbb BN |
412 | int |
413 | xfs_dir_removename( | |
a50d2ab0 BF |
414 | struct xfs_trans *tp, |
415 | struct xfs_inode *dp, | |
416 | struct xfs_name *name, | |
417 | xfs_ino_t ino, | |
a50d2ab0 | 418 | xfs_extlen_t total) /* bmap's total block count */ |
2bd0ea18 | 419 | { |
a50d2ab0 BF |
420 | struct xfs_da_args *args; |
421 | int rval; | |
422 | int v; /* type-checking value */ | |
2bd0ea18 | 423 | |
e37bf53c | 424 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
79896434 | 425 | XFS_STATS_INC(dp->i_mount, xs_dir_remove); |
5e656dbb | 426 | |
ff105f75 DC |
427 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
428 | if (!args) | |
12b53197 | 429 | return -ENOMEM; |
ff105f75 DC |
430 | |
431 | args->geo = dp->i_mount->m_dir_geo; | |
432 | args->name = name->name; | |
433 | args->namelen = name->len; | |
434 | args->filetype = name->type; | |
435 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
436 | args->inumber = ino; | |
437 | args->dp = dp; | |
ff105f75 DC |
438 | args->total = total; |
439 | args->whichfork = XFS_DATA_FORK; | |
440 | args->trans = tp; | |
441 | ||
442 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
443 | rval = xfs_dir2_sf_removename(args); | |
444 | goto out_free; | |
445 | } | |
446 | ||
447 | rval = xfs_dir2_isblock(args, &v); | |
448 | if (rval) | |
449 | goto out_free; | |
450 | if (v) { | |
451 | rval = xfs_dir2_block_removename(args); | |
452 | goto out_free; | |
453 | } | |
454 | ||
455 | rval = xfs_dir2_isleaf(args, &v); | |
456 | if (rval) | |
457 | goto out_free; | |
458 | if (v) | |
459 | rval = xfs_dir2_leaf_removename(args); | |
2bd0ea18 | 460 | else |
ff105f75 DC |
461 | rval = xfs_dir2_node_removename(args); |
462 | out_free: | |
463 | kmem_free(args); | |
2bd0ea18 NS |
464 | return rval; |
465 | } | |
466 | ||
467 | /* | |
468 | * Replace the inode number of a directory entry. | |
469 | */ | |
5e656dbb BN |
470 | int |
471 | xfs_dir_replace( | |
a50d2ab0 BF |
472 | struct xfs_trans *tp, |
473 | struct xfs_inode *dp, | |
474 | struct xfs_name *name, /* name of entry to replace */ | |
475 | xfs_ino_t inum, /* new inode number */ | |
a50d2ab0 | 476 | xfs_extlen_t total) /* bmap's total block count */ |
2bd0ea18 | 477 | { |
a50d2ab0 BF |
478 | struct xfs_da_args *args; |
479 | int rval; | |
480 | int v; /* type-checking value */ | |
2bd0ea18 | 481 | |
e37bf53c | 482 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
a95cf252 | 483 | |
ff105f75 DC |
484 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
485 | if (rval) | |
2bd0ea18 | 486 | return rval; |
5e656dbb | 487 | |
ff105f75 DC |
488 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
489 | if (!args) | |
12b53197 | 490 | return -ENOMEM; |
ff105f75 DC |
491 | |
492 | args->geo = dp->i_mount->m_dir_geo; | |
493 | args->name = name->name; | |
494 | args->namelen = name->len; | |
495 | args->filetype = name->type; | |
496 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); | |
497 | args->inumber = inum; | |
498 | args->dp = dp; | |
ff105f75 DC |
499 | args->total = total; |
500 | args->whichfork = XFS_DATA_FORK; | |
501 | args->trans = tp; | |
502 | ||
503 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { | |
504 | rval = xfs_dir2_sf_replace(args); | |
505 | goto out_free; | |
506 | } | |
507 | ||
508 | rval = xfs_dir2_isblock(args, &v); | |
509 | if (rval) | |
510 | goto out_free; | |
511 | if (v) { | |
512 | rval = xfs_dir2_block_replace(args); | |
513 | goto out_free; | |
514 | } | |
515 | ||
516 | rval = xfs_dir2_isleaf(args, &v); | |
517 | if (rval) | |
518 | goto out_free; | |
519 | if (v) | |
520 | rval = xfs_dir2_leaf_replace(args); | |
2bd0ea18 | 521 | else |
ff105f75 DC |
522 | rval = xfs_dir2_node_replace(args); |
523 | out_free: | |
524 | kmem_free(args); | |
2bd0ea18 NS |
525 | return rval; |
526 | } | |
527 | ||
4a34b33d DC |
528 | /* |
529 | * See if this entry can be added to the directory without allocating space. | |
4a34b33d DC |
530 | */ |
531 | int | |
532 | xfs_dir_canenter( | |
533 | xfs_trans_t *tp, | |
534 | xfs_inode_t *dp, | |
5a35bf2c | 535 | struct xfs_name *name) /* name of entry to add */ |
4a34b33d | 536 | { |
015bc82e | 537 | return xfs_dir_createname(tp, dp, name, 0, 0); |
4a34b33d DC |
538 | } |
539 | ||
2bd0ea18 NS |
540 | /* |
541 | * Utility routines. | |
542 | */ | |
543 | ||
544 | /* | |
545 | * Add a block to the directory. | |
a2ceac1f DC |
546 | * |
547 | * This routine is for data and free blocks, not leaf/node blocks which are | |
548 | * handled by xfs_da_grow_inode. | |
2bd0ea18 | 549 | */ |
5e656dbb | 550 | int |
2bd0ea18 | 551 | xfs_dir2_grow_inode( |
a2ceac1f DC |
552 | struct xfs_da_args *args, |
553 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ | |
554 | xfs_dir2_db_t *dbp) /* out: block number added */ | |
2bd0ea18 | 555 | { |
a2ceac1f DC |
556 | struct xfs_inode *dp = args->dp; |
557 | struct xfs_mount *mp = dp->i_mount; | |
558 | xfs_fileoff_t bno; /* directory offset of new block */ | |
559 | int count; /* count of filesystem blocks */ | |
560 | int error; | |
56b2de80 DC |
561 | |
562 | trace_xfs_dir2_grow_inode(args, space); | |
2bd0ea18 | 563 | |
2bd0ea18 NS |
564 | /* |
565 | * Set lowest possible block in the space requested. | |
566 | */ | |
567 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); | |
ff105f75 | 568 | count = args->geo->fsbcount; |
2bd0ea18 | 569 | |
a2ceac1f DC |
570 | error = xfs_da_grow_inode_int(args, &bno, count); |
571 | if (error) | |
572 | return error; | |
56b2de80 | 573 | |
ff105f75 | 574 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
56b2de80 | 575 | |
2bd0ea18 NS |
576 | /* |
577 | * Update file's size if this is the data space and it grew. | |
578 | */ | |
579 | if (space == XFS_DIR2_DATA_SPACE) { | |
580 | xfs_fsize_t size; /* directory file (data) size */ | |
581 | ||
582 | size = XFS_FSB_TO_B(mp, bno + count); | |
583 | if (size > dp->i_d.di_size) { | |
584 | dp->i_d.di_size = size; | |
a2ceac1f | 585 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
2bd0ea18 NS |
586 | } |
587 | } | |
588 | return 0; | |
589 | } | |
590 | ||
591 | /* | |
592 | * See if the directory is a single-block form directory. | |
593 | */ | |
5e656dbb | 594 | int |
2bd0ea18 | 595 | xfs_dir2_isblock( |
ff105f75 DC |
596 | struct xfs_da_args *args, |
597 | int *vp) /* out: 1 is block, 0 is not block */ | |
2bd0ea18 | 598 | { |
ff105f75 DC |
599 | xfs_fileoff_t last; /* last file offset */ |
600 | int rval; | |
2bd0ea18 | 601 | |
ff105f75 | 602 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
2bd0ea18 | 603 | return rval; |
ff105f75 | 604 | rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize; |
3cfabff6 AG |
605 | if (rval != 0 && args->dp->i_d.di_size != args->geo->blksize) |
606 | return -EFSCORRUPTED; | |
2bd0ea18 NS |
607 | *vp = rval; |
608 | return 0; | |
609 | } | |
610 | ||
611 | /* | |
612 | * See if the directory is a single-leaf form directory. | |
613 | */ | |
5e656dbb | 614 | int |
2bd0ea18 | 615 | xfs_dir2_isleaf( |
ff105f75 DC |
616 | struct xfs_da_args *args, |
617 | int *vp) /* out: 1 is block, 0 is not block */ | |
2bd0ea18 | 618 | { |
ff105f75 DC |
619 | xfs_fileoff_t last; /* last file offset */ |
620 | int rval; | |
2bd0ea18 | 621 | |
ff105f75 | 622 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
2bd0ea18 | 623 | return rval; |
ff105f75 | 624 | *vp = last == args->geo->leafblk + args->geo->fsbcount; |
2bd0ea18 NS |
625 | return 0; |
626 | } | |
627 | ||
628 | /* | |
629 | * Remove the given block from the directory. | |
630 | * This routine is used for data and free blocks, leaf/node are done | |
631 | * by xfs_da_shrink_inode. | |
632 | */ | |
633 | int | |
634 | xfs_dir2_shrink_inode( | |
a50d2ab0 BF |
635 | struct xfs_da_args *args, |
636 | xfs_dir2_db_t db, | |
637 | struct xfs_buf *bp) | |
2bd0ea18 | 638 | { |
a50d2ab0 BF |
639 | xfs_fileoff_t bno; /* directory file offset */ |
640 | xfs_dablk_t da; /* directory file offset */ | |
641 | int done; /* bunmap is finished */ | |
642 | struct xfs_inode *dp; | |
643 | int error; | |
644 | struct xfs_mount *mp; | |
645 | struct xfs_trans *tp; | |
2bd0ea18 | 646 | |
56b2de80 DC |
647 | trace_xfs_dir2_shrink_inode(args, db); |
648 | ||
2bd0ea18 NS |
649 | dp = args->dp; |
650 | mp = dp->i_mount; | |
651 | tp = args->trans; | |
ff105f75 | 652 | da = xfs_dir2_db_to_da(args->geo, db); |
db9cba4e DC |
653 | |
654 | /* Unmap the fsblock(s). */ | |
d3c5f3dd | 655 | error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, &done); |
db9cba4e | 656 | if (error) { |
2bd0ea18 | 657 | /* |
db9cba4e DC |
658 | * ENOSPC actually can happen if we're in a removename with no |
659 | * space reservation, and the resulting block removal would | |
660 | * cause a bmap btree split or conversion from extents to btree. | |
661 | * This can only happen for un-fragmented directory blocks, | |
662 | * since you need to be punching out the middle of an extent. | |
663 | * In this case we need to leave the block in the file, and not | |
664 | * binval it. So the block has to be in a consistent empty | |
665 | * state and appropriately logged. We don't free up the buffer, | |
666 | * the caller can tell it hasn't happened since it got an error | |
667 | * back. | |
2bd0ea18 NS |
668 | */ |
669 | return error; | |
670 | } | |
671 | ASSERT(done); | |
672 | /* | |
673 | * Invalidate the buffer from the transaction. | |
674 | */ | |
a2ceac1f | 675 | xfs_trans_binval(tp, bp); |
2bd0ea18 NS |
676 | /* |
677 | * If it's not a data block, we're done. | |
678 | */ | |
ff105f75 | 679 | if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) |
2bd0ea18 NS |
680 | return 0; |
681 | /* | |
682 | * If the block isn't the last one in the directory, we're done. | |
683 | */ | |
ff105f75 | 684 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) |
2bd0ea18 NS |
685 | return 0; |
686 | bno = da; | |
0e266570 | 687 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { |
2bd0ea18 NS |
688 | /* |
689 | * This can't really happen unless there's kernel corruption. | |
690 | */ | |
691 | return error; | |
692 | } | |
ff105f75 | 693 | if (db == args->geo->datablk) |
2bd0ea18 NS |
694 | ASSERT(bno == 0); |
695 | else | |
696 | ASSERT(bno > 0); | |
697 | /* | |
698 | * Set the size to the new last block. | |
699 | */ | |
700 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); | |
701 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
702 | return 0; | |
703 | } |