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" | |
26 | #include "xfs_dir.h" | |
27 | #include "xfs_dir2.h" | |
28 | #include "xfs_alloc.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_quota.h" | |
31 | #include "xfs_mount.h" | |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
35 | #include "xfs_dir_sf.h" |
36 | #include "xfs_dir2_sf.h" | |
a844f451 | 37 | #include "xfs_attr_sf.h" |
1da177e4 LT |
38 | #include "xfs_dinode.h" |
39 | #include "xfs_inode.h" | |
40 | #include "xfs_bmap.h" | |
a844f451 NS |
41 | #include "xfs_btree.h" |
42 | #include "xfs_ialloc.h" | |
1da177e4 LT |
43 | #include "xfs_rtalloc.h" |
44 | #include "xfs_error.h" | |
45 | #include "xfs_itable.h" | |
46 | #include "xfs_rw.h" | |
47 | #include "xfs_acl.h" | |
48 | #include "xfs_cap.h" | |
49 | #include "xfs_mac.h" | |
50 | #include "xfs_attr.h" | |
51 | #include "xfs_buf_item.h" | |
52 | #include "xfs_utils.h" | |
53 | ||
54 | #include <linux/xattr.h> | |
55 | #include <linux/namei.h> | |
56 | ||
4aeb664c NS |
57 | /* |
58 | * Change the requested timestamp in the given inode. | |
59 | * We don't lock across timestamp updates, and we don't log them but | |
60 | * we do record the fact that there is dirty information in core. | |
61 | * | |
62 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
63 | * with XFS_ICHGTIME_ACC to be sure that access time | |
64 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
65 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
66 | * timestamp if the filesystem is mounted noacctm. | |
67 | */ | |
68 | void | |
69 | xfs_ichgtime( | |
70 | xfs_inode_t *ip, | |
71 | int flags) | |
72 | { | |
73 | struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); | |
74 | timespec_t tv; | |
75 | ||
76 | /* | |
77 | * We're not supposed to change timestamps in readonly-mounted | |
78 | * filesystems. Throw it away if anyone asks us. | |
79 | */ | |
80 | if (unlikely(IS_RDONLY(inode))) | |
81 | return; | |
82 | ||
83 | /* | |
84 | * Don't update access timestamps on reads if mounted "noatime". | |
85 | * Throw it away if anyone asks us. | |
86 | */ | |
87 | if (unlikely( | |
88 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
89 | (flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
90 | XFS_ICHGTIME_ACC)) | |
91 | return; | |
92 | ||
93 | nanotime(&tv); | |
94 | if (flags & XFS_ICHGTIME_MOD) { | |
95 | inode->i_mtime = tv; | |
96 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
97 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
98 | } | |
99 | if (flags & XFS_ICHGTIME_ACC) { | |
100 | inode->i_atime = tv; | |
101 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
102 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
103 | } | |
104 | if (flags & XFS_ICHGTIME_CHG) { | |
105 | inode->i_ctime = tv; | |
106 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
107 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
108 | } | |
109 | ||
110 | /* | |
111 | * We update the i_update_core field _after_ changing | |
112 | * the timestamps in order to coordinate properly with | |
113 | * xfs_iflush() so that we don't lose timestamp updates. | |
114 | * This keeps us from having to hold the inode lock | |
115 | * while doing this. We use the SYNCHRONIZE macro to | |
116 | * ensure that the compiler does not reorder the update | |
117 | * of i_update_core above the timestamp updates above. | |
118 | */ | |
119 | SYNCHRONIZE(); | |
120 | ip->i_update_core = 1; | |
121 | if (!(inode->i_state & I_LOCK)) | |
122 | mark_inode_dirty_sync(inode); | |
123 | } | |
124 | ||
125 | /* | |
126 | * Variant on the above which avoids querying the system clock | |
127 | * in situations where we know the Linux inode timestamps have | |
128 | * just been updated (and so we can update our inode cheaply). | |
129 | * We also skip the readonly and noatime checks here, they are | |
130 | * also catered for already. | |
131 | */ | |
132 | void | |
133 | xfs_ichgtime_fast( | |
134 | xfs_inode_t *ip, | |
135 | struct inode *inode, | |
136 | int flags) | |
137 | { | |
138 | timespec_t *tvp; | |
139 | ||
140 | /* | |
141 | * We're not supposed to change timestamps in readonly-mounted | |
142 | * filesystems. Throw it away if anyone asks us. | |
143 | */ | |
144 | if (unlikely(IS_RDONLY(inode))) | |
145 | return; | |
146 | ||
147 | /* | |
148 | * Don't update access timestamps on reads if mounted "noatime". | |
149 | * Throw it away if anyone asks us. | |
150 | */ | |
151 | if (unlikely( | |
152 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
153 | ((flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
154 | XFS_ICHGTIME_ACC))) | |
155 | return; | |
156 | ||
157 | if (flags & XFS_ICHGTIME_MOD) { | |
158 | tvp = &inode->i_mtime; | |
159 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
160 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
161 | } | |
162 | if (flags & XFS_ICHGTIME_ACC) { | |
163 | tvp = &inode->i_atime; | |
164 | ip->i_d.di_atime.t_sec = (__int32_t)tvp->tv_sec; | |
165 | ip->i_d.di_atime.t_nsec = (__int32_t)tvp->tv_nsec; | |
166 | } | |
167 | if (flags & XFS_ICHGTIME_CHG) { | |
168 | tvp = &inode->i_ctime; | |
169 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
170 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
171 | } | |
172 | ||
173 | /* | |
174 | * We update the i_update_core field _after_ changing | |
175 | * the timestamps in order to coordinate properly with | |
176 | * xfs_iflush() so that we don't lose timestamp updates. | |
177 | * This keeps us from having to hold the inode lock | |
178 | * while doing this. We use the SYNCHRONIZE macro to | |
179 | * ensure that the compiler does not reorder the update | |
180 | * of i_update_core above the timestamp updates above. | |
181 | */ | |
182 | SYNCHRONIZE(); | |
183 | ip->i_update_core = 1; | |
184 | if (!(inode->i_state & I_LOCK)) | |
185 | mark_inode_dirty_sync(inode); | |
186 | } | |
187 | ||
1da177e4 LT |
188 | |
189 | /* | |
190 | * Pull the link count and size up from the xfs inode to the linux inode | |
191 | */ | |
192 | STATIC void | |
193 | validate_fields( | |
194 | struct inode *ip) | |
195 | { | |
196 | vnode_t *vp = LINVFS_GET_VP(ip); | |
197 | vattr_t va; | |
198 | int error; | |
199 | ||
200 | va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; | |
201 | VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error); | |
202 | if (likely(!error)) { | |
203 | ip->i_nlink = va.va_nlink; | |
204 | ip->i_blocks = va.va_nblocks; | |
205 | ||
1b1dcc1b | 206 | /* we're under i_mutex so i_size can't change under us */ |
1da177e4 LT |
207 | if (i_size_read(ip) != va.va_size) |
208 | i_size_write(ip, va.va_size); | |
209 | } | |
210 | } | |
211 | ||
212 | /* | |
213 | * Determine whether a process has a valid fs_struct (kernel daemons | |
214 | * like knfsd don't have an fs_struct). | |
215 | * | |
216 | * XXX(hch): nfsd is broken, better fix it instead. | |
217 | */ | |
218 | STATIC inline int | |
219 | has_fs_struct(struct task_struct *task) | |
220 | { | |
221 | return (task->fs != init_task.fs); | |
222 | } | |
223 | ||
224 | STATIC int | |
225 | linvfs_mknod( | |
226 | struct inode *dir, | |
227 | struct dentry *dentry, | |
228 | int mode, | |
229 | dev_t rdev) | |
230 | { | |
231 | struct inode *ip; | |
232 | vattr_t va; | |
233 | vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir); | |
234 | xfs_acl_t *default_acl = NULL; | |
235 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
236 | int error; | |
237 | ||
238 | /* | |
239 | * Irix uses Missed'em'V split, but doesn't want to see | |
240 | * the upper 5 bits of (14bit) major. | |
241 | */ | |
242 | if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff) | |
243 | return -EINVAL; | |
244 | ||
245 | if (test_default_acl && test_default_acl(dvp)) { | |
246 | if (!_ACL_ALLOC(default_acl)) | |
247 | return -ENOMEM; | |
248 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { | |
249 | _ACL_FREE(default_acl); | |
250 | default_acl = NULL; | |
251 | } | |
252 | } | |
253 | ||
254 | if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current)) | |
255 | mode &= ~current->fs->umask; | |
256 | ||
257 | memset(&va, 0, sizeof(va)); | |
258 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; | |
1da177e4 LT |
259 | va.va_mode = mode; |
260 | ||
261 | switch (mode & S_IFMT) { | |
262 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
263 | va.va_rdev = sysv_encode_dev(rdev); | |
264 | va.va_mask |= XFS_AT_RDEV; | |
265 | /*FALLTHROUGH*/ | |
266 | case S_IFREG: | |
267 | VOP_CREATE(dvp, dentry, &va, &vp, NULL, error); | |
268 | break; | |
269 | case S_IFDIR: | |
270 | VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error); | |
271 | break; | |
272 | default: | |
273 | error = EINVAL; | |
274 | break; | |
275 | } | |
276 | ||
277 | if (default_acl) { | |
278 | if (!error) { | |
279 | error = _ACL_INHERIT(vp, &va, default_acl); | |
280 | if (!error) { | |
281 | VMODIFY(vp); | |
282 | } else { | |
283 | struct dentry teardown = {}; | |
284 | int err2; | |
285 | ||
286 | /* Oh, the horror. | |
287 | * If we can't add the ACL we must back out. | |
288 | * ENOSPC can hit here, among other things. | |
289 | */ | |
290 | teardown.d_inode = ip = LINVFS_GET_IP(vp); | |
291 | teardown.d_name = dentry->d_name; | |
292 | ||
293 | vn_mark_bad(vp); | |
294 | ||
295 | if (S_ISDIR(mode)) | |
296 | VOP_RMDIR(dvp, &teardown, NULL, err2); | |
297 | else | |
298 | VOP_REMOVE(dvp, &teardown, NULL, err2); | |
299 | VN_RELE(vp); | |
300 | } | |
301 | } | |
302 | _ACL_FREE(default_acl); | |
303 | } | |
304 | ||
305 | if (!error) { | |
306 | ASSERT(vp); | |
307 | ip = LINVFS_GET_IP(vp); | |
308 | ||
309 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
310 | ip->i_rdev = rdev; | |
311 | else if (S_ISDIR(mode)) | |
312 | validate_fields(ip); | |
313 | d_instantiate(dentry, ip); | |
314 | validate_fields(dir); | |
315 | } | |
316 | return -error; | |
317 | } | |
318 | ||
319 | STATIC int | |
320 | linvfs_create( | |
321 | struct inode *dir, | |
322 | struct dentry *dentry, | |
323 | int mode, | |
324 | struct nameidata *nd) | |
325 | { | |
326 | return linvfs_mknod(dir, dentry, mode, 0); | |
327 | } | |
328 | ||
329 | STATIC int | |
330 | linvfs_mkdir( | |
331 | struct inode *dir, | |
332 | struct dentry *dentry, | |
333 | int mode) | |
334 | { | |
335 | return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0); | |
336 | } | |
337 | ||
338 | STATIC struct dentry * | |
339 | linvfs_lookup( | |
340 | struct inode *dir, | |
341 | struct dentry *dentry, | |
342 | struct nameidata *nd) | |
343 | { | |
344 | struct vnode *vp = LINVFS_GET_VP(dir), *cvp; | |
345 | int error; | |
346 | ||
347 | if (dentry->d_name.len >= MAXNAMELEN) | |
348 | return ERR_PTR(-ENAMETOOLONG); | |
349 | ||
350 | VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error); | |
351 | if (error) { | |
352 | if (unlikely(error != ENOENT)) | |
353 | return ERR_PTR(-error); | |
354 | d_add(dentry, NULL); | |
355 | return NULL; | |
356 | } | |
357 | ||
358 | return d_splice_alias(LINVFS_GET_IP(cvp), dentry); | |
359 | } | |
360 | ||
361 | STATIC int | |
362 | linvfs_link( | |
363 | struct dentry *old_dentry, | |
364 | struct inode *dir, | |
365 | struct dentry *dentry) | |
366 | { | |
367 | struct inode *ip; /* inode of guy being linked to */ | |
368 | vnode_t *tdvp; /* target directory for new name/link */ | |
369 | vnode_t *vp; /* vp of name being linked */ | |
370 | int error; | |
371 | ||
372 | ip = old_dentry->d_inode; /* inode being linked to */ | |
373 | if (S_ISDIR(ip->i_mode)) | |
374 | return -EPERM; | |
375 | ||
376 | tdvp = LINVFS_GET_VP(dir); | |
377 | vp = LINVFS_GET_VP(ip); | |
378 | ||
379 | VOP_LINK(tdvp, vp, dentry, NULL, error); | |
380 | if (!error) { | |
381 | VMODIFY(tdvp); | |
382 | VN_HOLD(vp); | |
383 | validate_fields(ip); | |
384 | d_instantiate(dentry, ip); | |
385 | } | |
386 | return -error; | |
387 | } | |
388 | ||
389 | STATIC int | |
390 | linvfs_unlink( | |
391 | struct inode *dir, | |
392 | struct dentry *dentry) | |
393 | { | |
394 | struct inode *inode; | |
395 | vnode_t *dvp; /* directory containing name to remove */ | |
396 | int error; | |
397 | ||
398 | inode = dentry->d_inode; | |
399 | dvp = LINVFS_GET_VP(dir); | |
400 | ||
401 | VOP_REMOVE(dvp, dentry, NULL, error); | |
402 | if (!error) { | |
403 | validate_fields(dir); /* For size only */ | |
404 | validate_fields(inode); | |
405 | } | |
406 | ||
407 | return -error; | |
408 | } | |
409 | ||
410 | STATIC int | |
411 | linvfs_symlink( | |
412 | struct inode *dir, | |
413 | struct dentry *dentry, | |
414 | const char *symname) | |
415 | { | |
416 | struct inode *ip; | |
417 | vattr_t va; | |
418 | vnode_t *dvp; /* directory containing name of symlink */ | |
419 | vnode_t *cvp; /* used to lookup symlink to put in dentry */ | |
420 | int error; | |
421 | ||
422 | dvp = LINVFS_GET_VP(dir); | |
423 | cvp = NULL; | |
424 | ||
425 | memset(&va, 0, sizeof(va)); | |
0432dab2 CH |
426 | va.va_mode = S_IFLNK | |
427 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); | |
1da177e4 LT |
428 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
429 | ||
430 | error = 0; | |
431 | VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error); | |
432 | if (!error && cvp) { | |
1da177e4 LT |
433 | ip = LINVFS_GET_IP(cvp); |
434 | d_instantiate(dentry, ip); | |
435 | validate_fields(dir); | |
436 | validate_fields(ip); /* size needs update */ | |
437 | } | |
438 | return -error; | |
439 | } | |
440 | ||
441 | STATIC int | |
442 | linvfs_rmdir( | |
443 | struct inode *dir, | |
444 | struct dentry *dentry) | |
445 | { | |
446 | struct inode *inode = dentry->d_inode; | |
447 | vnode_t *dvp = LINVFS_GET_VP(dir); | |
448 | int error; | |
449 | ||
450 | VOP_RMDIR(dvp, dentry, NULL, error); | |
451 | if (!error) { | |
452 | validate_fields(inode); | |
453 | validate_fields(dir); | |
454 | } | |
455 | return -error; | |
456 | } | |
457 | ||
458 | STATIC int | |
459 | linvfs_rename( | |
460 | struct inode *odir, | |
461 | struct dentry *odentry, | |
462 | struct inode *ndir, | |
463 | struct dentry *ndentry) | |
464 | { | |
465 | struct inode *new_inode = ndentry->d_inode; | |
466 | vnode_t *fvp; /* from directory */ | |
467 | vnode_t *tvp; /* target directory */ | |
468 | int error; | |
469 | ||
470 | fvp = LINVFS_GET_VP(odir); | |
471 | tvp = LINVFS_GET_VP(ndir); | |
472 | ||
473 | VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error); | |
474 | if (error) | |
475 | return -error; | |
476 | ||
477 | if (new_inode) | |
478 | validate_fields(new_inode); | |
479 | ||
480 | validate_fields(odir); | |
481 | if (ndir != odir) | |
482 | validate_fields(ndir); | |
483 | return 0; | |
484 | } | |
485 | ||
486 | /* | |
487 | * careful here - this function can get called recursively, so | |
488 | * we need to be very careful about how much stack we use. | |
489 | * uio is kmalloced for this reason... | |
490 | */ | |
008b150a | 491 | STATIC void * |
1da177e4 LT |
492 | linvfs_follow_link( |
493 | struct dentry *dentry, | |
494 | struct nameidata *nd) | |
495 | { | |
496 | vnode_t *vp; | |
497 | uio_t *uio; | |
498 | iovec_t iov; | |
499 | int error; | |
500 | char *link; | |
501 | ||
502 | ASSERT(dentry); | |
503 | ASSERT(nd); | |
504 | ||
505 | link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL); | |
506 | if (!link) { | |
507 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 508 | return NULL; |
1da177e4 LT |
509 | } |
510 | ||
511 | uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL); | |
512 | if (!uio) { | |
513 | kfree(link); | |
514 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 515 | return NULL; |
1da177e4 LT |
516 | } |
517 | ||
518 | vp = LINVFS_GET_VP(dentry->d_inode); | |
519 | ||
520 | iov.iov_base = link; | |
521 | iov.iov_len = MAXNAMELEN; | |
522 | ||
523 | uio->uio_iov = &iov; | |
524 | uio->uio_offset = 0; | |
525 | uio->uio_segflg = UIO_SYSSPACE; | |
526 | uio->uio_resid = MAXNAMELEN; | |
527 | uio->uio_iovcnt = 1; | |
528 | ||
529 | VOP_READLINK(vp, uio, 0, NULL, error); | |
530 | if (error) { | |
531 | kfree(link); | |
532 | link = ERR_PTR(-error); | |
533 | } else { | |
534 | link[MAXNAMELEN - uio->uio_resid] = '\0'; | |
535 | } | |
536 | kfree(uio); | |
537 | ||
538 | nd_set_link(nd, link); | |
008b150a | 539 | return NULL; |
1da177e4 LT |
540 | } |
541 | ||
cde410a9 NS |
542 | STATIC void |
543 | linvfs_put_link( | |
544 | struct dentry *dentry, | |
545 | struct nameidata *nd, | |
546 | void *p) | |
1da177e4 | 547 | { |
cde410a9 NS |
548 | char *s = nd_get_link(nd); |
549 | ||
1da177e4 LT |
550 | if (!IS_ERR(s)) |
551 | kfree(s); | |
552 | } | |
553 | ||
554 | #ifdef CONFIG_XFS_POSIX_ACL | |
555 | STATIC int | |
556 | linvfs_permission( | |
557 | struct inode *inode, | |
558 | int mode, | |
559 | struct nameidata *nd) | |
560 | { | |
561 | vnode_t *vp = LINVFS_GET_VP(inode); | |
562 | int error; | |
563 | ||
564 | mode <<= 6; /* convert from linux to vnode access bits */ | |
565 | VOP_ACCESS(vp, mode, NULL, error); | |
566 | return -error; | |
567 | } | |
568 | #else | |
569 | #define linvfs_permission NULL | |
570 | #endif | |
571 | ||
572 | STATIC int | |
573 | linvfs_getattr( | |
574 | struct vfsmount *mnt, | |
575 | struct dentry *dentry, | |
576 | struct kstat *stat) | |
577 | { | |
578 | struct inode *inode = dentry->d_inode; | |
579 | vnode_t *vp = LINVFS_GET_VP(inode); | |
580 | int error = 0; | |
581 | ||
582 | if (unlikely(vp->v_flag & VMODIFIED)) | |
583 | error = vn_revalidate(vp); | |
584 | if (!error) | |
585 | generic_fillattr(inode, stat); | |
586 | return 0; | |
587 | } | |
588 | ||
589 | STATIC int | |
590 | linvfs_setattr( | |
591 | struct dentry *dentry, | |
592 | struct iattr *attr) | |
593 | { | |
594 | struct inode *inode = dentry->d_inode; | |
595 | unsigned int ia_valid = attr->ia_valid; | |
596 | vnode_t *vp = LINVFS_GET_VP(inode); | |
597 | vattr_t vattr; | |
598 | int flags = 0; | |
599 | int error; | |
600 | ||
601 | memset(&vattr, 0, sizeof(vattr_t)); | |
602 | if (ia_valid & ATTR_UID) { | |
603 | vattr.va_mask |= XFS_AT_UID; | |
604 | vattr.va_uid = attr->ia_uid; | |
605 | } | |
606 | if (ia_valid & ATTR_GID) { | |
607 | vattr.va_mask |= XFS_AT_GID; | |
608 | vattr.va_gid = attr->ia_gid; | |
609 | } | |
610 | if (ia_valid & ATTR_SIZE) { | |
611 | vattr.va_mask |= XFS_AT_SIZE; | |
612 | vattr.va_size = attr->ia_size; | |
613 | } | |
614 | if (ia_valid & ATTR_ATIME) { | |
615 | vattr.va_mask |= XFS_AT_ATIME; | |
616 | vattr.va_atime = attr->ia_atime; | |
617 | } | |
618 | if (ia_valid & ATTR_MTIME) { | |
619 | vattr.va_mask |= XFS_AT_MTIME; | |
620 | vattr.va_mtime = attr->ia_mtime; | |
621 | } | |
622 | if (ia_valid & ATTR_CTIME) { | |
623 | vattr.va_mask |= XFS_AT_CTIME; | |
624 | vattr.va_ctime = attr->ia_ctime; | |
625 | } | |
626 | if (ia_valid & ATTR_MODE) { | |
627 | vattr.va_mask |= XFS_AT_MODE; | |
628 | vattr.va_mode = attr->ia_mode; | |
629 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
630 | inode->i_mode &= ~S_ISGID; | |
631 | } | |
632 | ||
633 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
634 | flags |= ATTR_UTIME; | |
635 | #ifdef ATTR_NO_BLOCK | |
636 | if ((ia_valid & ATTR_NO_BLOCK)) | |
637 | flags |= ATTR_NONBLOCK; | |
638 | #endif | |
639 | ||
640 | VOP_SETATTR(vp, &vattr, flags, NULL, error); | |
641 | if (error) | |
642 | return -error; | |
643 | vn_revalidate(vp); | |
644 | return error; | |
645 | } | |
646 | ||
647 | STATIC void | |
648 | linvfs_truncate( | |
649 | struct inode *inode) | |
650 | { | |
651 | block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block); | |
652 | } | |
653 | ||
654 | STATIC int | |
655 | linvfs_setxattr( | |
656 | struct dentry *dentry, | |
657 | const char *name, | |
658 | const void *data, | |
659 | size_t size, | |
660 | int flags) | |
661 | { | |
662 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
663 | char *attr = (char *)name; | |
664 | attrnames_t *namesp; | |
665 | int xflags = 0; | |
666 | int error; | |
667 | ||
668 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
669 | if (!namesp) | |
670 | return -EOPNOTSUPP; | |
671 | attr += namesp->attr_namelen; | |
672 | error = namesp->attr_capable(vp, NULL); | |
673 | if (error) | |
674 | return error; | |
675 | ||
676 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
677 | if (flags & XATTR_CREATE) | |
678 | xflags |= ATTR_CREATE; | |
679 | if (flags & XATTR_REPLACE) | |
680 | xflags |= ATTR_REPLACE; | |
681 | xflags |= namesp->attr_flag; | |
682 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
683 | } | |
684 | ||
685 | STATIC ssize_t | |
686 | linvfs_getxattr( | |
687 | struct dentry *dentry, | |
688 | const char *name, | |
689 | void *data, | |
690 | size_t size) | |
691 | { | |
692 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
693 | char *attr = (char *)name; | |
694 | attrnames_t *namesp; | |
695 | int xflags = 0; | |
696 | ssize_t error; | |
697 | ||
698 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
699 | if (!namesp) | |
700 | return -EOPNOTSUPP; | |
701 | attr += namesp->attr_namelen; | |
702 | error = namesp->attr_capable(vp, NULL); | |
703 | if (error) | |
704 | return error; | |
705 | ||
706 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
707 | if (!size) { | |
708 | xflags |= ATTR_KERNOVAL; | |
709 | data = NULL; | |
710 | } | |
711 | xflags |= namesp->attr_flag; | |
712 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
713 | } | |
714 | ||
715 | STATIC ssize_t | |
716 | linvfs_listxattr( | |
717 | struct dentry *dentry, | |
718 | char *data, | |
719 | size_t size) | |
720 | { | |
721 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
722 | int error, xflags = ATTR_KERNAMELS; | |
723 | ssize_t result; | |
724 | ||
725 | if (!size) | |
726 | xflags |= ATTR_KERNOVAL; | |
727 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
728 | ||
729 | error = attr_generic_list(vp, data, size, xflags, &result); | |
730 | if (error < 0) | |
731 | return error; | |
732 | return result; | |
733 | } | |
734 | ||
735 | STATIC int | |
736 | linvfs_removexattr( | |
737 | struct dentry *dentry, | |
738 | const char *name) | |
739 | { | |
740 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
741 | char *attr = (char *)name; | |
742 | attrnames_t *namesp; | |
743 | int xflags = 0; | |
744 | int error; | |
745 | ||
746 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
747 | if (!namesp) | |
748 | return -EOPNOTSUPP; | |
749 | attr += namesp->attr_namelen; | |
750 | error = namesp->attr_capable(vp, NULL); | |
751 | if (error) | |
752 | return error; | |
753 | xflags |= namesp->attr_flag; | |
754 | return namesp->attr_remove(vp, attr, xflags); | |
755 | } | |
756 | ||
757 | ||
758 | struct inode_operations linvfs_file_inode_operations = { | |
759 | .permission = linvfs_permission, | |
760 | .truncate = linvfs_truncate, | |
761 | .getattr = linvfs_getattr, | |
762 | .setattr = linvfs_setattr, | |
763 | .setxattr = linvfs_setxattr, | |
764 | .getxattr = linvfs_getxattr, | |
765 | .listxattr = linvfs_listxattr, | |
766 | .removexattr = linvfs_removexattr, | |
767 | }; | |
768 | ||
769 | struct inode_operations linvfs_dir_inode_operations = { | |
770 | .create = linvfs_create, | |
771 | .lookup = linvfs_lookup, | |
772 | .link = linvfs_link, | |
773 | .unlink = linvfs_unlink, | |
774 | .symlink = linvfs_symlink, | |
775 | .mkdir = linvfs_mkdir, | |
776 | .rmdir = linvfs_rmdir, | |
777 | .mknod = linvfs_mknod, | |
778 | .rename = linvfs_rename, | |
779 | .permission = linvfs_permission, | |
780 | .getattr = linvfs_getattr, | |
781 | .setattr = linvfs_setattr, | |
782 | .setxattr = linvfs_setxattr, | |
783 | .getxattr = linvfs_getxattr, | |
784 | .listxattr = linvfs_listxattr, | |
785 | .removexattr = linvfs_removexattr, | |
786 | }; | |
787 | ||
788 | struct inode_operations linvfs_symlink_inode_operations = { | |
789 | .readlink = generic_readlink, | |
790 | .follow_link = linvfs_follow_link, | |
791 | .put_link = linvfs_put_link, | |
792 | .permission = linvfs_permission, | |
793 | .getattr = linvfs_getattr, | |
794 | .setattr = linvfs_setattr, | |
795 | .setxattr = linvfs_setxattr, | |
796 | .getxattr = linvfs_getxattr, | |
797 | .listxattr = linvfs_listxattr, | |
798 | .removexattr = linvfs_removexattr, | |
799 | }; |