Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 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 LT |
18 | #include "xfs.h" |
19 | #include "xfs_fs.h" | |
a844f451 | 20 | #include "xfs_bit.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 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_quota.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 | 34 | #include "xfs_dir2_sf.h" |
a844f451 | 35 | #include "xfs_attr_sf.h" |
1da177e4 LT |
36 | #include "xfs_dinode.h" |
37 | #include "xfs_inode.h" | |
38 | #include "xfs_bmap.h" | |
a844f451 NS |
39 | #include "xfs_btree.h" |
40 | #include "xfs_ialloc.h" | |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
43 | #include "xfs_itable.h" | |
44 | #include "xfs_rw.h" | |
45 | #include "xfs_acl.h" | |
1da177e4 LT |
46 | #include "xfs_attr.h" |
47 | #include "xfs_buf_item.h" | |
48 | #include "xfs_utils.h" | |
739bfb2a | 49 | #include "xfs_vnodeops.h" |
1da177e4 | 50 | |
16f7e0fe | 51 | #include <linux/capability.h> |
1da177e4 LT |
52 | #include <linux/xattr.h> |
53 | #include <linux/namei.h> | |
446ada4a | 54 | #include <linux/security.h> |
3ed65264 | 55 | #include <linux/falloc.h> |
1da177e4 | 56 | |
42fe2b1f CH |
57 | /* |
58 | * Bring the atime in the XFS inode uptodate. | |
59 | * Used before logging the inode to disk or when the Linux inode goes away. | |
60 | */ | |
61 | void | |
62 | xfs_synchronize_atime( | |
63 | xfs_inode_t *ip) | |
64 | { | |
af048193 | 65 | struct inode *inode = ip->i_vnode; |
42fe2b1f | 66 | |
af048193 CH |
67 | if (inode) { |
68 | ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; | |
69 | ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; | |
42fe2b1f CH |
70 | } |
71 | } | |
72 | ||
5d51eff4 DC |
73 | /* |
74 | * If the linux inode exists, mark it dirty. | |
75 | * Used when commiting a dirty inode into a transaction so that | |
76 | * the inode will get written back by the linux code | |
77 | */ | |
78 | void | |
79 | xfs_mark_inode_dirty_sync( | |
80 | xfs_inode_t *ip) | |
81 | { | |
af048193 | 82 | struct inode *inode = ip->i_vnode; |
5d51eff4 | 83 | |
af048193 CH |
84 | if (inode) |
85 | mark_inode_dirty_sync(inode); | |
5d51eff4 DC |
86 | } |
87 | ||
4aeb664c NS |
88 | /* |
89 | * Change the requested timestamp in the given inode. | |
90 | * We don't lock across timestamp updates, and we don't log them but | |
91 | * we do record the fact that there is dirty information in core. | |
92 | * | |
93 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
94 | * with XFS_ICHGTIME_ACC to be sure that access time | |
95 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
96 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
97 | * timestamp if the filesystem is mounted noacctm. | |
98 | */ | |
99 | void | |
100 | xfs_ichgtime( | |
101 | xfs_inode_t *ip, | |
102 | int flags) | |
103 | { | |
ec86dc02 | 104 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
4aeb664c NS |
105 | timespec_t tv; |
106 | ||
4aeb664c NS |
107 | nanotime(&tv); |
108 | if (flags & XFS_ICHGTIME_MOD) { | |
109 | inode->i_mtime = tv; | |
110 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
111 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
112 | } | |
113 | if (flags & XFS_ICHGTIME_ACC) { | |
114 | inode->i_atime = tv; | |
115 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
116 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
117 | } | |
118 | if (flags & XFS_ICHGTIME_CHG) { | |
119 | inode->i_ctime = tv; | |
120 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
121 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
122 | } | |
123 | ||
124 | /* | |
125 | * We update the i_update_core field _after_ changing | |
126 | * the timestamps in order to coordinate properly with | |
127 | * xfs_iflush() so that we don't lose timestamp updates. | |
128 | * This keeps us from having to hold the inode lock | |
129 | * while doing this. We use the SYNCHRONIZE macro to | |
130 | * ensure that the compiler does not reorder the update | |
131 | * of i_update_core above the timestamp updates above. | |
132 | */ | |
133 | SYNCHRONIZE(); | |
134 | ip->i_update_core = 1; | |
cf10e82b | 135 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
136 | mark_inode_dirty_sync(inode); |
137 | } | |
138 | ||
139 | /* | |
140 | * Variant on the above which avoids querying the system clock | |
141 | * in situations where we know the Linux inode timestamps have | |
142 | * just been updated (and so we can update our inode cheaply). | |
4aeb664c NS |
143 | */ |
144 | void | |
145 | xfs_ichgtime_fast( | |
146 | xfs_inode_t *ip, | |
147 | struct inode *inode, | |
148 | int flags) | |
149 | { | |
150 | timespec_t *tvp; | |
151 | ||
152 | /* | |
42fe2b1f CH |
153 | * Atime updates for read() & friends are handled lazily now, and |
154 | * explicit updates must go through xfs_ichgtime() | |
4aeb664c | 155 | */ |
42fe2b1f | 156 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
4aeb664c | 157 | |
4aeb664c NS |
158 | if (flags & XFS_ICHGTIME_MOD) { |
159 | tvp = &inode->i_mtime; | |
160 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
161 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
162 | } | |
4aeb664c NS |
163 | if (flags & XFS_ICHGTIME_CHG) { |
164 | tvp = &inode->i_ctime; | |
165 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
166 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
167 | } | |
168 | ||
169 | /* | |
170 | * We update the i_update_core field _after_ changing | |
171 | * the timestamps in order to coordinate properly with | |
172 | * xfs_iflush() so that we don't lose timestamp updates. | |
173 | * This keeps us from having to hold the inode lock | |
174 | * while doing this. We use the SYNCHRONIZE macro to | |
175 | * ensure that the compiler does not reorder the update | |
176 | * of i_update_core above the timestamp updates above. | |
177 | */ | |
178 | SYNCHRONIZE(); | |
179 | ip->i_update_core = 1; | |
cf10e82b | 180 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
181 | mark_inode_dirty_sync(inode); |
182 | } | |
183 | ||
1da177e4 LT |
184 | |
185 | /* | |
186 | * Pull the link count and size up from the xfs inode to the linux inode | |
187 | */ | |
188 | STATIC void | |
416c6d5b | 189 | xfs_validate_fields( |
6572bc28 | 190 | struct inode *inode) |
1da177e4 | 191 | { |
6572bc28 CH |
192 | struct xfs_inode *ip = XFS_I(inode); |
193 | loff_t size; | |
194 | ||
6572bc28 CH |
195 | /* we're under i_sem so i_size can't change under us */ |
196 | size = XFS_ISIZE(ip); | |
197 | if (i_size_read(inode) != size) | |
198 | i_size_write(inode, size); | |
1da177e4 LT |
199 | } |
200 | ||
446ada4a NS |
201 | /* |
202 | * Hook in SELinux. This is not quite correct yet, what we really need | |
203 | * here (as we do for default ACLs) is a mechanism by which creation of | |
204 | * these attrs can be journalled at inode creation time (along with the | |
205 | * inode, of course, such that log replay can't cause these to be lost). | |
206 | */ | |
207 | STATIC int | |
416c6d5b | 208 | xfs_init_security( |
af048193 | 209 | struct inode *inode, |
446ada4a NS |
210 | struct inode *dir) |
211 | { | |
af048193 | 212 | struct xfs_inode *ip = XFS_I(inode); |
446ada4a NS |
213 | size_t length; |
214 | void *value; | |
215 | char *name; | |
216 | int error; | |
217 | ||
af048193 CH |
218 | error = security_inode_init_security(inode, dir, &name, |
219 | &value, &length); | |
446ada4a NS |
220 | if (error) { |
221 | if (error == -EOPNOTSUPP) | |
222 | return 0; | |
223 | return -error; | |
224 | } | |
225 | ||
af048193 | 226 | error = xfs_attr_set(ip, name, value, length, ATTR_SECURE); |
446ada4a | 227 | if (!error) |
af048193 | 228 | xfs_iflags_set(ip, XFS_IMODIFIED); |
446ada4a NS |
229 | |
230 | kfree(name); | |
231 | kfree(value); | |
232 | return error; | |
233 | } | |
234 | ||
556b8b16 BN |
235 | static void |
236 | xfs_dentry_to_name( | |
237 | struct xfs_name *namep, | |
238 | struct dentry *dentry) | |
239 | { | |
240 | namep->name = dentry->d_name.name; | |
241 | namep->len = dentry->d_name.len; | |
242 | } | |
243 | ||
7989cb8e | 244 | STATIC void |
416c6d5b | 245 | xfs_cleanup_inode( |
739bfb2a | 246 | struct inode *dir, |
af048193 | 247 | struct inode *inode, |
220b5284 | 248 | struct dentry *dentry, |
3a69c7dc YL |
249 | int mode) |
250 | { | |
556b8b16 | 251 | struct xfs_name teardown; |
3a69c7dc YL |
252 | |
253 | /* Oh, the horror. | |
220b5284 | 254 | * If we can't add the ACL or we fail in |
416c6d5b | 255 | * xfs_init_security we must back out. |
3a69c7dc YL |
256 | * ENOSPC can hit here, among other things. |
257 | */ | |
556b8b16 | 258 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc YL |
259 | |
260 | if (S_ISDIR(mode)) | |
556b8b16 | 261 | xfs_rmdir(XFS_I(dir), &teardown, XFS_I(inode)); |
3a69c7dc | 262 | else |
556b8b16 | 263 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
af048193 | 264 | iput(inode); |
3a69c7dc YL |
265 | } |
266 | ||
1da177e4 | 267 | STATIC int |
416c6d5b | 268 | xfs_vn_mknod( |
1da177e4 LT |
269 | struct inode *dir, |
270 | struct dentry *dentry, | |
271 | int mode, | |
272 | dev_t rdev) | |
273 | { | |
db0bb7ba | 274 | struct inode *inode; |
979ebab1 | 275 | struct xfs_inode *ip = NULL; |
1da177e4 | 276 | xfs_acl_t *default_acl = NULL; |
556b8b16 | 277 | struct xfs_name name; |
1da177e4 LT |
278 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; |
279 | int error; | |
280 | ||
281 | /* | |
282 | * Irix uses Missed'em'V split, but doesn't want to see | |
283 | * the upper 5 bits of (14bit) major. | |
284 | */ | |
220b5284 | 285 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
1da177e4 LT |
286 | return -EINVAL; |
287 | ||
979ebab1 | 288 | if (test_default_acl && test_default_acl(dir)) { |
220b5284 | 289 | if (!_ACL_ALLOC(default_acl)) { |
1da177e4 | 290 | return -ENOMEM; |
220b5284 | 291 | } |
979ebab1 | 292 | if (!_ACL_GET_DEFAULT(dir, default_acl)) { |
1da177e4 LT |
293 | _ACL_FREE(default_acl); |
294 | default_acl = NULL; | |
295 | } | |
296 | } | |
297 | ||
556b8b16 BN |
298 | xfs_dentry_to_name(&name, dentry); |
299 | ||
db0bb7ba | 300 | if (IS_POSIXACL(dir) && !default_acl) |
1da177e4 LT |
301 | mode &= ~current->fs->umask; |
302 | ||
1da177e4 | 303 | switch (mode & S_IFMT) { |
db0bb7ba CH |
304 | case S_IFCHR: |
305 | case S_IFBLK: | |
306 | case S_IFIFO: | |
307 | case S_IFSOCK: | |
3e5daf05 | 308 | rdev = sysv_encode_dev(rdev); |
1da177e4 | 309 | case S_IFREG: |
556b8b16 | 310 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL); |
1da177e4 LT |
311 | break; |
312 | case S_IFDIR: | |
556b8b16 | 313 | error = xfs_mkdir(XFS_I(dir), &name, mode, &ip, NULL); |
1da177e4 LT |
314 | break; |
315 | default: | |
316 | error = EINVAL; | |
317 | break; | |
318 | } | |
319 | ||
db0bb7ba CH |
320 | if (unlikely(error)) |
321 | goto out_free_acl; | |
446ada4a | 322 | |
979ebab1 CH |
323 | inode = ip->i_vnode; |
324 | ||
325 | error = xfs_init_security(inode, dir); | |
db0bb7ba CH |
326 | if (unlikely(error)) |
327 | goto out_cleanup_inode; | |
328 | ||
329 | if (default_acl) { | |
979ebab1 | 330 | error = _ACL_INHERIT(inode, mode, default_acl); |
db0bb7ba CH |
331 | if (unlikely(error)) |
332 | goto out_cleanup_inode; | |
979ebab1 | 333 | xfs_iflags_set(ip, XFS_IMODIFIED); |
1da177e4 LT |
334 | _ACL_FREE(default_acl); |
335 | } | |
336 | ||
1da177e4 | 337 | |
db0bb7ba CH |
338 | if (S_ISDIR(mode)) |
339 | xfs_validate_fields(inode); | |
340 | d_instantiate(dentry, inode); | |
341 | xfs_validate_fields(dir); | |
342 | return -error; | |
343 | ||
344 | out_cleanup_inode: | |
979ebab1 | 345 | xfs_cleanup_inode(dir, inode, dentry, mode); |
db0bb7ba CH |
346 | out_free_acl: |
347 | if (default_acl) | |
348 | _ACL_FREE(default_acl); | |
1da177e4 LT |
349 | return -error; |
350 | } | |
351 | ||
352 | STATIC int | |
416c6d5b | 353 | xfs_vn_create( |
1da177e4 LT |
354 | struct inode *dir, |
355 | struct dentry *dentry, | |
356 | int mode, | |
357 | struct nameidata *nd) | |
358 | { | |
416c6d5b | 359 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
360 | } |
361 | ||
362 | STATIC int | |
416c6d5b | 363 | xfs_vn_mkdir( |
1da177e4 LT |
364 | struct inode *dir, |
365 | struct dentry *dentry, | |
366 | int mode) | |
367 | { | |
416c6d5b | 368 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
369 | } |
370 | ||
371 | STATIC struct dentry * | |
416c6d5b | 372 | xfs_vn_lookup( |
1da177e4 LT |
373 | struct inode *dir, |
374 | struct dentry *dentry, | |
375 | struct nameidata *nd) | |
376 | { | |
ef1f5e7a | 377 | struct xfs_inode *cip; |
556b8b16 | 378 | struct xfs_name name; |
1da177e4 LT |
379 | int error; |
380 | ||
381 | if (dentry->d_name.len >= MAXNAMELEN) | |
382 | return ERR_PTR(-ENAMETOOLONG); | |
383 | ||
556b8b16 BN |
384 | xfs_dentry_to_name(&name, dentry); |
385 | error = xfs_lookup(XFS_I(dir), &name, &cip); | |
67fcaa73 | 386 | if (unlikely(error)) { |
1da177e4 LT |
387 | if (unlikely(error != ENOENT)) |
388 | return ERR_PTR(-error); | |
389 | d_add(dentry, NULL); | |
390 | return NULL; | |
391 | } | |
392 | ||
ef1f5e7a | 393 | return d_splice_alias(cip->i_vnode, dentry); |
1da177e4 LT |
394 | } |
395 | ||
396 | STATIC int | |
416c6d5b | 397 | xfs_vn_link( |
1da177e4 LT |
398 | struct dentry *old_dentry, |
399 | struct inode *dir, | |
400 | struct dentry *dentry) | |
401 | { | |
a3da7896 | 402 | struct inode *inode; /* inode of guy being linked to */ |
556b8b16 | 403 | struct xfs_name name; |
1da177e4 LT |
404 | int error; |
405 | ||
a3da7896 | 406 | inode = old_dentry->d_inode; |
556b8b16 | 407 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 408 | |
a3da7896 | 409 | igrab(inode); |
556b8b16 | 410 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
97dfd70c | 411 | if (unlikely(error)) { |
a3da7896 CH |
412 | iput(inode); |
413 | return -error; | |
1da177e4 | 414 | } |
a3da7896 CH |
415 | |
416 | xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED); | |
417 | xfs_validate_fields(inode); | |
418 | d_instantiate(dentry, inode); | |
419 | return 0; | |
1da177e4 LT |
420 | } |
421 | ||
422 | STATIC int | |
416c6d5b | 423 | xfs_vn_unlink( |
1da177e4 LT |
424 | struct inode *dir, |
425 | struct dentry *dentry) | |
426 | { | |
427 | struct inode *inode; | |
556b8b16 | 428 | struct xfs_name name; |
1da177e4 LT |
429 | int error; |
430 | ||
431 | inode = dentry->d_inode; | |
556b8b16 | 432 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 433 | |
556b8b16 | 434 | error = xfs_remove(XFS_I(dir), &name, XFS_I(inode)); |
220b5284 | 435 | if (likely(!error)) { |
6572bc28 CH |
436 | xfs_validate_fields(dir); /* size needs update */ |
437 | xfs_validate_fields(inode); | |
1da177e4 | 438 | } |
1da177e4 LT |
439 | return -error; |
440 | } | |
441 | ||
442 | STATIC int | |
416c6d5b | 443 | xfs_vn_symlink( |
1da177e4 LT |
444 | struct inode *dir, |
445 | struct dentry *dentry, | |
446 | const char *symname) | |
447 | { | |
3937be5b CH |
448 | struct inode *inode; |
449 | struct xfs_inode *cip = NULL; | |
556b8b16 | 450 | struct xfs_name name; |
1da177e4 | 451 | int error; |
3e5daf05 | 452 | mode_t mode; |
1da177e4 | 453 | |
3e5daf05 | 454 | mode = S_IFLNK | |
0432dab2 | 455 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
556b8b16 | 456 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 457 | |
556b8b16 | 458 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL); |
3937be5b CH |
459 | if (unlikely(error)) |
460 | goto out; | |
461 | ||
462 | inode = cip->i_vnode; | |
463 | ||
464 | error = xfs_init_security(inode, dir); | |
465 | if (unlikely(error)) | |
466 | goto out_cleanup_inode; | |
467 | ||
468 | d_instantiate(dentry, inode); | |
469 | xfs_validate_fields(dir); | |
470 | xfs_validate_fields(inode); | |
471 | return 0; | |
472 | ||
473 | out_cleanup_inode: | |
474 | xfs_cleanup_inode(dir, inode, dentry, 0); | |
475 | out: | |
1da177e4 LT |
476 | return -error; |
477 | } | |
478 | ||
479 | STATIC int | |
416c6d5b | 480 | xfs_vn_rmdir( |
1da177e4 LT |
481 | struct inode *dir, |
482 | struct dentry *dentry) | |
483 | { | |
484 | struct inode *inode = dentry->d_inode; | |
556b8b16 | 485 | struct xfs_name name; |
1da177e4 LT |
486 | int error; |
487 | ||
556b8b16 BN |
488 | xfs_dentry_to_name(&name, dentry); |
489 | ||
490 | error = xfs_rmdir(XFS_I(dir), &name, XFS_I(inode)); | |
220b5284 | 491 | if (likely(!error)) { |
6572bc28 CH |
492 | xfs_validate_fields(inode); |
493 | xfs_validate_fields(dir); | |
1da177e4 LT |
494 | } |
495 | return -error; | |
496 | } | |
497 | ||
498 | STATIC int | |
416c6d5b | 499 | xfs_vn_rename( |
1da177e4 LT |
500 | struct inode *odir, |
501 | struct dentry *odentry, | |
502 | struct inode *ndir, | |
503 | struct dentry *ndentry) | |
504 | { | |
505 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
506 | struct xfs_name oname; |
507 | struct xfs_name nname; | |
1da177e4 LT |
508 | int error; |
509 | ||
556b8b16 BN |
510 | xfs_dentry_to_name(&oname, odentry); |
511 | xfs_dentry_to_name(&nname, ndentry); | |
512 | ||
513 | error = xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), | |
cfa853e4 CH |
514 | XFS_I(ndir), &nname, new_inode ? |
515 | XFS_I(new_inode) : NULL); | |
220b5284 NS |
516 | if (likely(!error)) { |
517 | if (new_inode) | |
6572bc28 CH |
518 | xfs_validate_fields(new_inode); |
519 | xfs_validate_fields(odir); | |
220b5284 | 520 | if (ndir != odir) |
6572bc28 | 521 | xfs_validate_fields(ndir); |
220b5284 | 522 | } |
220b5284 | 523 | return -error; |
1da177e4 LT |
524 | } |
525 | ||
526 | /* | |
527 | * careful here - this function can get called recursively, so | |
528 | * we need to be very careful about how much stack we use. | |
529 | * uio is kmalloced for this reason... | |
530 | */ | |
008b150a | 531 | STATIC void * |
416c6d5b | 532 | xfs_vn_follow_link( |
1da177e4 LT |
533 | struct dentry *dentry, |
534 | struct nameidata *nd) | |
535 | { | |
1da177e4 | 536 | char *link; |
804c83c3 | 537 | int error = -ENOMEM; |
1da177e4 | 538 | |
f52720ca | 539 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
540 | if (!link) |
541 | goto out_err; | |
1da177e4 | 542 | |
739bfb2a | 543 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
544 | if (unlikely(error)) |
545 | goto out_kfree; | |
1da177e4 LT |
546 | |
547 | nd_set_link(nd, link); | |
008b150a | 548 | return NULL; |
804c83c3 CH |
549 | |
550 | out_kfree: | |
551 | kfree(link); | |
552 | out_err: | |
553 | nd_set_link(nd, ERR_PTR(error)); | |
554 | return NULL; | |
1da177e4 LT |
555 | } |
556 | ||
cde410a9 | 557 | STATIC void |
416c6d5b | 558 | xfs_vn_put_link( |
cde410a9 NS |
559 | struct dentry *dentry, |
560 | struct nameidata *nd, | |
561 | void *p) | |
1da177e4 | 562 | { |
cde410a9 NS |
563 | char *s = nd_get_link(nd); |
564 | ||
1da177e4 LT |
565 | if (!IS_ERR(s)) |
566 | kfree(s); | |
567 | } | |
568 | ||
569 | #ifdef CONFIG_XFS_POSIX_ACL | |
4576758d CH |
570 | STATIC int |
571 | xfs_check_acl( | |
572 | struct inode *inode, | |
573 | int mask) | |
574 | { | |
575 | struct xfs_inode *ip = XFS_I(inode); | |
576 | int error; | |
577 | ||
578 | xfs_itrace_entry(ip); | |
579 | ||
580 | if (XFS_IFORK_Q(ip)) { | |
581 | error = xfs_acl_iaccess(ip, mask, NULL); | |
582 | if (error != -1) | |
583 | return -error; | |
584 | } | |
585 | ||
586 | return -EAGAIN; | |
587 | } | |
588 | ||
1da177e4 | 589 | STATIC int |
416c6d5b | 590 | xfs_vn_permission( |
4576758d CH |
591 | struct inode *inode, |
592 | int mask, | |
593 | struct nameidata *nd) | |
1da177e4 | 594 | { |
4576758d | 595 | return generic_permission(inode, mask, xfs_check_acl); |
1da177e4 LT |
596 | } |
597 | #else | |
416c6d5b | 598 | #define xfs_vn_permission NULL |
1da177e4 LT |
599 | #endif |
600 | ||
601 | STATIC int | |
416c6d5b | 602 | xfs_vn_getattr( |
c43f4087 CH |
603 | struct vfsmount *mnt, |
604 | struct dentry *dentry, | |
605 | struct kstat *stat) | |
1da177e4 | 606 | { |
c43f4087 CH |
607 | struct inode *inode = dentry->d_inode; |
608 | struct xfs_inode *ip = XFS_I(inode); | |
609 | struct xfs_mount *mp = ip->i_mount; | |
610 | ||
611 | xfs_itrace_entry(ip); | |
612 | ||
613 | if (XFS_FORCED_SHUTDOWN(mp)) | |
614 | return XFS_ERROR(EIO); | |
615 | ||
616 | stat->size = XFS_ISIZE(ip); | |
617 | stat->dev = inode->i_sb->s_dev; | |
618 | stat->mode = ip->i_d.di_mode; | |
619 | stat->nlink = ip->i_d.di_nlink; | |
620 | stat->uid = ip->i_d.di_uid; | |
621 | stat->gid = ip->i_d.di_gid; | |
622 | stat->ino = ip->i_ino; | |
623 | #if XFS_BIG_INUMS | |
624 | stat->ino += mp->m_inoadd; | |
625 | #endif | |
626 | stat->atime = inode->i_atime; | |
627 | stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
628 | stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
629 | stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
630 | stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
631 | stat->blocks = | |
632 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
633 | ||
634 | ||
635 | switch (inode->i_mode & S_IFMT) { | |
636 | case S_IFBLK: | |
637 | case S_IFCHR: | |
638 | stat->blksize = BLKDEV_IOSIZE; | |
639 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
640 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
641 | break; | |
642 | default: | |
71ddabb9 | 643 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
644 | /* |
645 | * If the file blocks are being allocated from a | |
646 | * realtime volume, then return the inode's realtime | |
647 | * extent size or the realtime volume's extent size. | |
648 | */ | |
649 | stat->blksize = | |
650 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
651 | } else | |
652 | stat->blksize = xfs_preferred_iosize(mp); | |
653 | stat->rdev = 0; | |
654 | break; | |
69e23b9a | 655 | } |
c43f4087 CH |
656 | |
657 | return 0; | |
1da177e4 LT |
658 | } |
659 | ||
660 | STATIC int | |
416c6d5b | 661 | xfs_vn_setattr( |
1da177e4 LT |
662 | struct dentry *dentry, |
663 | struct iattr *attr) | |
664 | { | |
665 | struct inode *inode = dentry->d_inode; | |
666 | unsigned int ia_valid = attr->ia_valid; | |
8285fb58 | 667 | bhv_vattr_t vattr = { 0 }; |
1da177e4 LT |
668 | int flags = 0; |
669 | int error; | |
670 | ||
1da177e4 LT |
671 | if (ia_valid & ATTR_UID) { |
672 | vattr.va_mask |= XFS_AT_UID; | |
673 | vattr.va_uid = attr->ia_uid; | |
674 | } | |
675 | if (ia_valid & ATTR_GID) { | |
676 | vattr.va_mask |= XFS_AT_GID; | |
677 | vattr.va_gid = attr->ia_gid; | |
678 | } | |
679 | if (ia_valid & ATTR_SIZE) { | |
680 | vattr.va_mask |= XFS_AT_SIZE; | |
681 | vattr.va_size = attr->ia_size; | |
682 | } | |
683 | if (ia_valid & ATTR_ATIME) { | |
684 | vattr.va_mask |= XFS_AT_ATIME; | |
685 | vattr.va_atime = attr->ia_atime; | |
8c0b5113 | 686 | inode->i_atime = attr->ia_atime; |
1da177e4 LT |
687 | } |
688 | if (ia_valid & ATTR_MTIME) { | |
689 | vattr.va_mask |= XFS_AT_MTIME; | |
690 | vattr.va_mtime = attr->ia_mtime; | |
691 | } | |
692 | if (ia_valid & ATTR_CTIME) { | |
693 | vattr.va_mask |= XFS_AT_CTIME; | |
694 | vattr.va_ctime = attr->ia_ctime; | |
695 | } | |
696 | if (ia_valid & ATTR_MODE) { | |
697 | vattr.va_mask |= XFS_AT_MODE; | |
698 | vattr.va_mode = attr->ia_mode; | |
699 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
700 | inode->i_mode &= ~S_ISGID; | |
701 | } | |
702 | ||
703 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
704 | flags |= ATTR_UTIME; | |
705 | #ifdef ATTR_NO_BLOCK | |
706 | if ((ia_valid & ATTR_NO_BLOCK)) | |
707 | flags |= ATTR_NONBLOCK; | |
708 | #endif | |
709 | ||
739bfb2a | 710 | error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL); |
220b5284 | 711 | if (likely(!error)) |
21a62542 | 712 | vn_revalidate(vn_from_inode(inode)); |
220b5284 | 713 | return -error; |
1da177e4 LT |
714 | } |
715 | ||
d87dd636 DC |
716 | /* |
717 | * block_truncate_page can return an error, but we can't propagate it | |
718 | * at all here. Leave a complaint + stack trace in the syslog because | |
719 | * this could be bad. If it is bad, we need to propagate the error further. | |
720 | */ | |
1da177e4 | 721 | STATIC void |
416c6d5b | 722 | xfs_vn_truncate( |
1da177e4 LT |
723 | struct inode *inode) |
724 | { | |
d87dd636 DC |
725 | int error; |
726 | error = block_truncate_page(inode->i_mapping, inode->i_size, | |
727 | xfs_get_blocks); | |
728 | WARN_ON(error); | |
1da177e4 LT |
729 | } |
730 | ||
731 | STATIC int | |
416c6d5b | 732 | xfs_vn_setxattr( |
1da177e4 LT |
733 | struct dentry *dentry, |
734 | const char *name, | |
735 | const void *data, | |
736 | size_t size, | |
737 | int flags) | |
738 | { | |
67fcaa73 | 739 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
740 | char *attr = (char *)name; |
741 | attrnames_t *namesp; | |
742 | int xflags = 0; | |
743 | int error; | |
744 | ||
745 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
746 | if (!namesp) | |
747 | return -EOPNOTSUPP; | |
748 | attr += namesp->attr_namelen; | |
749 | error = namesp->attr_capable(vp, NULL); | |
750 | if (error) | |
751 | return error; | |
752 | ||
753 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
754 | if (flags & XATTR_CREATE) | |
755 | xflags |= ATTR_CREATE; | |
756 | if (flags & XATTR_REPLACE) | |
757 | xflags |= ATTR_REPLACE; | |
758 | xflags |= namesp->attr_flag; | |
759 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
760 | } | |
761 | ||
762 | STATIC ssize_t | |
416c6d5b | 763 | xfs_vn_getxattr( |
1da177e4 LT |
764 | struct dentry *dentry, |
765 | const char *name, | |
766 | void *data, | |
767 | size_t size) | |
768 | { | |
67fcaa73 | 769 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
770 | char *attr = (char *)name; |
771 | attrnames_t *namesp; | |
772 | int xflags = 0; | |
773 | ssize_t error; | |
774 | ||
775 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
776 | if (!namesp) | |
777 | return -EOPNOTSUPP; | |
778 | attr += namesp->attr_namelen; | |
779 | error = namesp->attr_capable(vp, NULL); | |
780 | if (error) | |
781 | return error; | |
782 | ||
783 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
784 | if (!size) { | |
785 | xflags |= ATTR_KERNOVAL; | |
786 | data = NULL; | |
787 | } | |
788 | xflags |= namesp->attr_flag; | |
789 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
790 | } | |
791 | ||
792 | STATIC ssize_t | |
416c6d5b | 793 | xfs_vn_listxattr( |
1da177e4 LT |
794 | struct dentry *dentry, |
795 | char *data, | |
796 | size_t size) | |
797 | { | |
67fcaa73 | 798 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
799 | int error, xflags = ATTR_KERNAMELS; |
800 | ssize_t result; | |
801 | ||
802 | if (!size) | |
803 | xflags |= ATTR_KERNOVAL; | |
804 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
805 | ||
806 | error = attr_generic_list(vp, data, size, xflags, &result); | |
807 | if (error < 0) | |
808 | return error; | |
809 | return result; | |
810 | } | |
811 | ||
812 | STATIC int | |
416c6d5b | 813 | xfs_vn_removexattr( |
1da177e4 LT |
814 | struct dentry *dentry, |
815 | const char *name) | |
816 | { | |
67fcaa73 | 817 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
818 | char *attr = (char *)name; |
819 | attrnames_t *namesp; | |
820 | int xflags = 0; | |
821 | int error; | |
822 | ||
823 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
824 | if (!namesp) | |
825 | return -EOPNOTSUPP; | |
826 | attr += namesp->attr_namelen; | |
827 | error = namesp->attr_capable(vp, NULL); | |
828 | if (error) | |
829 | return error; | |
830 | xflags |= namesp->attr_flag; | |
831 | return namesp->attr_remove(vp, attr, xflags); | |
832 | } | |
833 | ||
3ed65264 DC |
834 | STATIC long |
835 | xfs_vn_fallocate( | |
836 | struct inode *inode, | |
837 | int mode, | |
838 | loff_t offset, | |
839 | loff_t len) | |
840 | { | |
841 | long error; | |
842 | loff_t new_size = 0; | |
843 | xfs_flock64_t bf; | |
844 | xfs_inode_t *ip = XFS_I(inode); | |
845 | ||
846 | /* preallocation on directories not yet supported */ | |
847 | error = -ENODEV; | |
848 | if (S_ISDIR(inode->i_mode)) | |
849 | goto out_error; | |
850 | ||
851 | bf.l_whence = 0; | |
852 | bf.l_start = offset; | |
853 | bf.l_len = len; | |
854 | ||
855 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
856 | error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, | |
857 | 0, NULL, ATTR_NOLOCK); | |
858 | if (!error && !(mode & FALLOC_FL_KEEP_SIZE) && | |
859 | offset + len > i_size_read(inode)) | |
860 | new_size = offset + len; | |
861 | ||
862 | /* Change file size if needed */ | |
863 | if (new_size) { | |
864 | bhv_vattr_t va; | |
865 | ||
866 | va.va_mask = XFS_AT_SIZE; | |
867 | va.va_size = new_size; | |
868 | error = xfs_setattr(ip, &va, ATTR_NOLOCK, NULL); | |
869 | } | |
870 | ||
871 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
872 | out_error: | |
873 | return error; | |
874 | } | |
1da177e4 | 875 | |
c5ef1c42 | 876 | const struct inode_operations xfs_inode_operations = { |
416c6d5b NS |
877 | .permission = xfs_vn_permission, |
878 | .truncate = xfs_vn_truncate, | |
879 | .getattr = xfs_vn_getattr, | |
880 | .setattr = xfs_vn_setattr, | |
881 | .setxattr = xfs_vn_setxattr, | |
882 | .getxattr = xfs_vn_getxattr, | |
883 | .listxattr = xfs_vn_listxattr, | |
884 | .removexattr = xfs_vn_removexattr, | |
3ed65264 | 885 | .fallocate = xfs_vn_fallocate, |
1da177e4 LT |
886 | }; |
887 | ||
c5ef1c42 | 888 | const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
889 | .create = xfs_vn_create, |
890 | .lookup = xfs_vn_lookup, | |
891 | .link = xfs_vn_link, | |
892 | .unlink = xfs_vn_unlink, | |
893 | .symlink = xfs_vn_symlink, | |
894 | .mkdir = xfs_vn_mkdir, | |
895 | .rmdir = xfs_vn_rmdir, | |
896 | .mknod = xfs_vn_mknod, | |
897 | .rename = xfs_vn_rename, | |
898 | .permission = xfs_vn_permission, | |
899 | .getattr = xfs_vn_getattr, | |
900 | .setattr = xfs_vn_setattr, | |
901 | .setxattr = xfs_vn_setxattr, | |
902 | .getxattr = xfs_vn_getxattr, | |
903 | .listxattr = xfs_vn_listxattr, | |
904 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
905 | }; |
906 | ||
c5ef1c42 | 907 | const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 908 | .readlink = generic_readlink, |
416c6d5b NS |
909 | .follow_link = xfs_vn_follow_link, |
910 | .put_link = xfs_vn_put_link, | |
911 | .permission = xfs_vn_permission, | |
912 | .getattr = xfs_vn_getattr, | |
913 | .setattr = xfs_vn_setattr, | |
914 | .setxattr = xfs_vn_setxattr, | |
915 | .getxattr = xfs_vn_getxattr, | |
916 | .listxattr = xfs_vn_listxattr, | |
917 | .removexattr = xfs_vn_removexattr, | |
1da177e4 | 918 | }; |