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 | ||
16f7e0fe | 54 | #include <linux/capability.h> |
1da177e4 LT |
55 | #include <linux/xattr.h> |
56 | #include <linux/namei.h> | |
57 | ||
fc33a7bb CH |
58 | #define IS_NOATIME(inode) ((inode->i_sb->s_flags & MS_NOATIME) || \ |
59 | (S_ISDIR(inode->i_mode) && inode->i_sb->s_flags & MS_NODIRATIME)) | |
60 | ||
4aeb664c NS |
61 | /* |
62 | * Change the requested timestamp in the given inode. | |
63 | * We don't lock across timestamp updates, and we don't log them but | |
64 | * we do record the fact that there is dirty information in core. | |
65 | * | |
66 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
67 | * with XFS_ICHGTIME_ACC to be sure that access time | |
68 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
69 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
70 | * timestamp if the filesystem is mounted noacctm. | |
71 | */ | |
72 | void | |
73 | xfs_ichgtime( | |
74 | xfs_inode_t *ip, | |
75 | int flags) | |
76 | { | |
77 | struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); | |
78 | timespec_t tv; | |
79 | ||
80 | /* | |
81 | * We're not supposed to change timestamps in readonly-mounted | |
82 | * filesystems. Throw it away if anyone asks us. | |
83 | */ | |
84 | if (unlikely(IS_RDONLY(inode))) | |
85 | return; | |
86 | ||
87 | /* | |
88 | * Don't update access timestamps on reads if mounted "noatime". | |
89 | * Throw it away if anyone asks us. | |
90 | */ | |
91 | if (unlikely( | |
92 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
93 | (flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
94 | XFS_ICHGTIME_ACC)) | |
95 | return; | |
96 | ||
97 | nanotime(&tv); | |
98 | if (flags & XFS_ICHGTIME_MOD) { | |
99 | inode->i_mtime = tv; | |
100 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
101 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
102 | } | |
103 | if (flags & XFS_ICHGTIME_ACC) { | |
104 | inode->i_atime = tv; | |
105 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
106 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
107 | } | |
108 | if (flags & XFS_ICHGTIME_CHG) { | |
109 | inode->i_ctime = tv; | |
110 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
111 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
112 | } | |
113 | ||
114 | /* | |
115 | * We update the i_update_core field _after_ changing | |
116 | * the timestamps in order to coordinate properly with | |
117 | * xfs_iflush() so that we don't lose timestamp updates. | |
118 | * This keeps us from having to hold the inode lock | |
119 | * while doing this. We use the SYNCHRONIZE macro to | |
120 | * ensure that the compiler does not reorder the update | |
121 | * of i_update_core above the timestamp updates above. | |
122 | */ | |
123 | SYNCHRONIZE(); | |
124 | ip->i_update_core = 1; | |
125 | if (!(inode->i_state & I_LOCK)) | |
126 | mark_inode_dirty_sync(inode); | |
127 | } | |
128 | ||
129 | /* | |
130 | * Variant on the above which avoids querying the system clock | |
131 | * in situations where we know the Linux inode timestamps have | |
132 | * just been updated (and so we can update our inode cheaply). | |
133 | * We also skip the readonly and noatime checks here, they are | |
134 | * also catered for already. | |
135 | */ | |
136 | void | |
137 | xfs_ichgtime_fast( | |
138 | xfs_inode_t *ip, | |
139 | struct inode *inode, | |
140 | int flags) | |
141 | { | |
142 | timespec_t *tvp; | |
143 | ||
144 | /* | |
145 | * We're not supposed to change timestamps in readonly-mounted | |
146 | * filesystems. Throw it away if anyone asks us. | |
147 | */ | |
148 | if (unlikely(IS_RDONLY(inode))) | |
149 | return; | |
150 | ||
151 | /* | |
152 | * Don't update access timestamps on reads if mounted "noatime". | |
153 | * Throw it away if anyone asks us. | |
154 | */ | |
155 | if (unlikely( | |
156 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
157 | ((flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
158 | XFS_ICHGTIME_ACC))) | |
159 | return; | |
160 | ||
161 | if (flags & XFS_ICHGTIME_MOD) { | |
162 | tvp = &inode->i_mtime; | |
163 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
164 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
165 | } | |
166 | if (flags & XFS_ICHGTIME_ACC) { | |
167 | tvp = &inode->i_atime; | |
168 | ip->i_d.di_atime.t_sec = (__int32_t)tvp->tv_sec; | |
169 | ip->i_d.di_atime.t_nsec = (__int32_t)tvp->tv_nsec; | |
170 | } | |
171 | if (flags & XFS_ICHGTIME_CHG) { | |
172 | tvp = &inode->i_ctime; | |
173 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
174 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
175 | } | |
176 | ||
177 | /* | |
178 | * We update the i_update_core field _after_ changing | |
179 | * the timestamps in order to coordinate properly with | |
180 | * xfs_iflush() so that we don't lose timestamp updates. | |
181 | * This keeps us from having to hold the inode lock | |
182 | * while doing this. We use the SYNCHRONIZE macro to | |
183 | * ensure that the compiler does not reorder the update | |
184 | * of i_update_core above the timestamp updates above. | |
185 | */ | |
186 | SYNCHRONIZE(); | |
187 | ip->i_update_core = 1; | |
188 | if (!(inode->i_state & I_LOCK)) | |
189 | mark_inode_dirty_sync(inode); | |
190 | } | |
191 | ||
1da177e4 LT |
192 | |
193 | /* | |
194 | * Pull the link count and size up from the xfs inode to the linux inode | |
195 | */ | |
196 | STATIC void | |
197 | validate_fields( | |
198 | struct inode *ip) | |
199 | { | |
200 | vnode_t *vp = LINVFS_GET_VP(ip); | |
201 | vattr_t va; | |
202 | int error; | |
203 | ||
204 | va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; | |
205 | VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error); | |
206 | if (likely(!error)) { | |
207 | ip->i_nlink = va.va_nlink; | |
208 | ip->i_blocks = va.va_nblocks; | |
209 | ||
1b1dcc1b | 210 | /* we're under i_mutex so i_size can't change under us */ |
1da177e4 LT |
211 | if (i_size_read(ip) != va.va_size) |
212 | i_size_write(ip, va.va_size); | |
213 | } | |
214 | } | |
215 | ||
216 | /* | |
217 | * Determine whether a process has a valid fs_struct (kernel daemons | |
218 | * like knfsd don't have an fs_struct). | |
219 | * | |
220 | * XXX(hch): nfsd is broken, better fix it instead. | |
221 | */ | |
222 | STATIC inline int | |
223 | has_fs_struct(struct task_struct *task) | |
224 | { | |
225 | return (task->fs != init_task.fs); | |
226 | } | |
227 | ||
228 | STATIC int | |
229 | linvfs_mknod( | |
230 | struct inode *dir, | |
231 | struct dentry *dentry, | |
232 | int mode, | |
233 | dev_t rdev) | |
234 | { | |
235 | struct inode *ip; | |
236 | vattr_t va; | |
237 | vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir); | |
238 | xfs_acl_t *default_acl = NULL; | |
239 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
240 | int error; | |
241 | ||
242 | /* | |
243 | * Irix uses Missed'em'V split, but doesn't want to see | |
244 | * the upper 5 bits of (14bit) major. | |
245 | */ | |
246 | if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff) | |
247 | return -EINVAL; | |
248 | ||
249 | if (test_default_acl && test_default_acl(dvp)) { | |
250 | if (!_ACL_ALLOC(default_acl)) | |
251 | return -ENOMEM; | |
252 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { | |
253 | _ACL_FREE(default_acl); | |
254 | default_acl = NULL; | |
255 | } | |
256 | } | |
257 | ||
258 | if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current)) | |
259 | mode &= ~current->fs->umask; | |
260 | ||
261 | memset(&va, 0, sizeof(va)); | |
262 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; | |
1da177e4 LT |
263 | va.va_mode = mode; |
264 | ||
265 | switch (mode & S_IFMT) { | |
266 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
267 | va.va_rdev = sysv_encode_dev(rdev); | |
268 | va.va_mask |= XFS_AT_RDEV; | |
269 | /*FALLTHROUGH*/ | |
270 | case S_IFREG: | |
271 | VOP_CREATE(dvp, dentry, &va, &vp, NULL, error); | |
272 | break; | |
273 | case S_IFDIR: | |
274 | VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error); | |
275 | break; | |
276 | default: | |
277 | error = EINVAL; | |
278 | break; | |
279 | } | |
280 | ||
281 | if (default_acl) { | |
282 | if (!error) { | |
283 | error = _ACL_INHERIT(vp, &va, default_acl); | |
284 | if (!error) { | |
285 | VMODIFY(vp); | |
286 | } else { | |
287 | struct dentry teardown = {}; | |
288 | int err2; | |
289 | ||
290 | /* Oh, the horror. | |
291 | * If we can't add the ACL we must back out. | |
292 | * ENOSPC can hit here, among other things. | |
293 | */ | |
294 | teardown.d_inode = ip = LINVFS_GET_IP(vp); | |
295 | teardown.d_name = dentry->d_name; | |
296 | ||
297 | vn_mark_bad(vp); | |
298 | ||
299 | if (S_ISDIR(mode)) | |
300 | VOP_RMDIR(dvp, &teardown, NULL, err2); | |
301 | else | |
302 | VOP_REMOVE(dvp, &teardown, NULL, err2); | |
303 | VN_RELE(vp); | |
304 | } | |
305 | } | |
306 | _ACL_FREE(default_acl); | |
307 | } | |
308 | ||
309 | if (!error) { | |
310 | ASSERT(vp); | |
311 | ip = LINVFS_GET_IP(vp); | |
312 | ||
313 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
314 | ip->i_rdev = rdev; | |
315 | else if (S_ISDIR(mode)) | |
316 | validate_fields(ip); | |
317 | d_instantiate(dentry, ip); | |
318 | validate_fields(dir); | |
319 | } | |
320 | return -error; | |
321 | } | |
322 | ||
323 | STATIC int | |
324 | linvfs_create( | |
325 | struct inode *dir, | |
326 | struct dentry *dentry, | |
327 | int mode, | |
328 | struct nameidata *nd) | |
329 | { | |
330 | return linvfs_mknod(dir, dentry, mode, 0); | |
331 | } | |
332 | ||
333 | STATIC int | |
334 | linvfs_mkdir( | |
335 | struct inode *dir, | |
336 | struct dentry *dentry, | |
337 | int mode) | |
338 | { | |
339 | return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0); | |
340 | } | |
341 | ||
342 | STATIC struct dentry * | |
343 | linvfs_lookup( | |
344 | struct inode *dir, | |
345 | struct dentry *dentry, | |
346 | struct nameidata *nd) | |
347 | { | |
348 | struct vnode *vp = LINVFS_GET_VP(dir), *cvp; | |
349 | int error; | |
350 | ||
351 | if (dentry->d_name.len >= MAXNAMELEN) | |
352 | return ERR_PTR(-ENAMETOOLONG); | |
353 | ||
354 | VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error); | |
355 | if (error) { | |
356 | if (unlikely(error != ENOENT)) | |
357 | return ERR_PTR(-error); | |
358 | d_add(dentry, NULL); | |
359 | return NULL; | |
360 | } | |
361 | ||
362 | return d_splice_alias(LINVFS_GET_IP(cvp), dentry); | |
363 | } | |
364 | ||
365 | STATIC int | |
366 | linvfs_link( | |
367 | struct dentry *old_dentry, | |
368 | struct inode *dir, | |
369 | struct dentry *dentry) | |
370 | { | |
371 | struct inode *ip; /* inode of guy being linked to */ | |
372 | vnode_t *tdvp; /* target directory for new name/link */ | |
373 | vnode_t *vp; /* vp of name being linked */ | |
374 | int error; | |
375 | ||
376 | ip = old_dentry->d_inode; /* inode being linked to */ | |
377 | if (S_ISDIR(ip->i_mode)) | |
378 | return -EPERM; | |
379 | ||
380 | tdvp = LINVFS_GET_VP(dir); | |
381 | vp = LINVFS_GET_VP(ip); | |
382 | ||
383 | VOP_LINK(tdvp, vp, dentry, NULL, error); | |
384 | if (!error) { | |
385 | VMODIFY(tdvp); | |
386 | VN_HOLD(vp); | |
387 | validate_fields(ip); | |
388 | d_instantiate(dentry, ip); | |
389 | } | |
390 | return -error; | |
391 | } | |
392 | ||
393 | STATIC int | |
394 | linvfs_unlink( | |
395 | struct inode *dir, | |
396 | struct dentry *dentry) | |
397 | { | |
398 | struct inode *inode; | |
399 | vnode_t *dvp; /* directory containing name to remove */ | |
400 | int error; | |
401 | ||
402 | inode = dentry->d_inode; | |
403 | dvp = LINVFS_GET_VP(dir); | |
404 | ||
405 | VOP_REMOVE(dvp, dentry, NULL, error); | |
406 | if (!error) { | |
407 | validate_fields(dir); /* For size only */ | |
408 | validate_fields(inode); | |
409 | } | |
410 | ||
411 | return -error; | |
412 | } | |
413 | ||
414 | STATIC int | |
415 | linvfs_symlink( | |
416 | struct inode *dir, | |
417 | struct dentry *dentry, | |
418 | const char *symname) | |
419 | { | |
420 | struct inode *ip; | |
421 | vattr_t va; | |
422 | vnode_t *dvp; /* directory containing name of symlink */ | |
423 | vnode_t *cvp; /* used to lookup symlink to put in dentry */ | |
424 | int error; | |
425 | ||
426 | dvp = LINVFS_GET_VP(dir); | |
427 | cvp = NULL; | |
428 | ||
429 | memset(&va, 0, sizeof(va)); | |
0432dab2 CH |
430 | va.va_mode = S_IFLNK | |
431 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); | |
1da177e4 LT |
432 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
433 | ||
434 | error = 0; | |
435 | VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error); | |
436 | if (!error && cvp) { | |
1da177e4 LT |
437 | ip = LINVFS_GET_IP(cvp); |
438 | d_instantiate(dentry, ip); | |
439 | validate_fields(dir); | |
440 | validate_fields(ip); /* size needs update */ | |
441 | } | |
442 | return -error; | |
443 | } | |
444 | ||
445 | STATIC int | |
446 | linvfs_rmdir( | |
447 | struct inode *dir, | |
448 | struct dentry *dentry) | |
449 | { | |
450 | struct inode *inode = dentry->d_inode; | |
451 | vnode_t *dvp = LINVFS_GET_VP(dir); | |
452 | int error; | |
453 | ||
454 | VOP_RMDIR(dvp, dentry, NULL, error); | |
455 | if (!error) { | |
456 | validate_fields(inode); | |
457 | validate_fields(dir); | |
458 | } | |
459 | return -error; | |
460 | } | |
461 | ||
462 | STATIC int | |
463 | linvfs_rename( | |
464 | struct inode *odir, | |
465 | struct dentry *odentry, | |
466 | struct inode *ndir, | |
467 | struct dentry *ndentry) | |
468 | { | |
469 | struct inode *new_inode = ndentry->d_inode; | |
470 | vnode_t *fvp; /* from directory */ | |
471 | vnode_t *tvp; /* target directory */ | |
472 | int error; | |
473 | ||
474 | fvp = LINVFS_GET_VP(odir); | |
475 | tvp = LINVFS_GET_VP(ndir); | |
476 | ||
477 | VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error); | |
478 | if (error) | |
479 | return -error; | |
480 | ||
481 | if (new_inode) | |
482 | validate_fields(new_inode); | |
483 | ||
484 | validate_fields(odir); | |
485 | if (ndir != odir) | |
486 | validate_fields(ndir); | |
487 | return 0; | |
488 | } | |
489 | ||
490 | /* | |
491 | * careful here - this function can get called recursively, so | |
492 | * we need to be very careful about how much stack we use. | |
493 | * uio is kmalloced for this reason... | |
494 | */ | |
008b150a | 495 | STATIC void * |
1da177e4 LT |
496 | linvfs_follow_link( |
497 | struct dentry *dentry, | |
498 | struct nameidata *nd) | |
499 | { | |
500 | vnode_t *vp; | |
501 | uio_t *uio; | |
502 | iovec_t iov; | |
503 | int error; | |
504 | char *link; | |
505 | ||
506 | ASSERT(dentry); | |
507 | ASSERT(nd); | |
508 | ||
509 | link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL); | |
510 | if (!link) { | |
511 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 512 | return NULL; |
1da177e4 LT |
513 | } |
514 | ||
515 | uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL); | |
516 | if (!uio) { | |
517 | kfree(link); | |
518 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 519 | return NULL; |
1da177e4 LT |
520 | } |
521 | ||
522 | vp = LINVFS_GET_VP(dentry->d_inode); | |
523 | ||
524 | iov.iov_base = link; | |
525 | iov.iov_len = MAXNAMELEN; | |
526 | ||
527 | uio->uio_iov = &iov; | |
528 | uio->uio_offset = 0; | |
529 | uio->uio_segflg = UIO_SYSSPACE; | |
530 | uio->uio_resid = MAXNAMELEN; | |
531 | uio->uio_iovcnt = 1; | |
532 | ||
533 | VOP_READLINK(vp, uio, 0, NULL, error); | |
534 | if (error) { | |
535 | kfree(link); | |
536 | link = ERR_PTR(-error); | |
537 | } else { | |
538 | link[MAXNAMELEN - uio->uio_resid] = '\0'; | |
539 | } | |
540 | kfree(uio); | |
541 | ||
542 | nd_set_link(nd, link); | |
008b150a | 543 | return NULL; |
1da177e4 LT |
544 | } |
545 | ||
cde410a9 NS |
546 | STATIC void |
547 | linvfs_put_link( | |
548 | struct dentry *dentry, | |
549 | struct nameidata *nd, | |
550 | void *p) | |
1da177e4 | 551 | { |
cde410a9 NS |
552 | char *s = nd_get_link(nd); |
553 | ||
1da177e4 LT |
554 | if (!IS_ERR(s)) |
555 | kfree(s); | |
556 | } | |
557 | ||
558 | #ifdef CONFIG_XFS_POSIX_ACL | |
559 | STATIC int | |
560 | linvfs_permission( | |
561 | struct inode *inode, | |
562 | int mode, | |
563 | struct nameidata *nd) | |
564 | { | |
565 | vnode_t *vp = LINVFS_GET_VP(inode); | |
566 | int error; | |
567 | ||
568 | mode <<= 6; /* convert from linux to vnode access bits */ | |
569 | VOP_ACCESS(vp, mode, NULL, error); | |
570 | return -error; | |
571 | } | |
572 | #else | |
573 | #define linvfs_permission NULL | |
574 | #endif | |
575 | ||
576 | STATIC int | |
577 | linvfs_getattr( | |
578 | struct vfsmount *mnt, | |
579 | struct dentry *dentry, | |
580 | struct kstat *stat) | |
581 | { | |
582 | struct inode *inode = dentry->d_inode; | |
583 | vnode_t *vp = LINVFS_GET_VP(inode); | |
584 | int error = 0; | |
585 | ||
586 | if (unlikely(vp->v_flag & VMODIFIED)) | |
587 | error = vn_revalidate(vp); | |
588 | if (!error) | |
589 | generic_fillattr(inode, stat); | |
590 | return 0; | |
591 | } | |
592 | ||
593 | STATIC int | |
594 | linvfs_setattr( | |
595 | struct dentry *dentry, | |
596 | struct iattr *attr) | |
597 | { | |
598 | struct inode *inode = dentry->d_inode; | |
599 | unsigned int ia_valid = attr->ia_valid; | |
600 | vnode_t *vp = LINVFS_GET_VP(inode); | |
601 | vattr_t vattr; | |
602 | int flags = 0; | |
603 | int error; | |
604 | ||
605 | memset(&vattr, 0, sizeof(vattr_t)); | |
606 | if (ia_valid & ATTR_UID) { | |
607 | vattr.va_mask |= XFS_AT_UID; | |
608 | vattr.va_uid = attr->ia_uid; | |
609 | } | |
610 | if (ia_valid & ATTR_GID) { | |
611 | vattr.va_mask |= XFS_AT_GID; | |
612 | vattr.va_gid = attr->ia_gid; | |
613 | } | |
614 | if (ia_valid & ATTR_SIZE) { | |
615 | vattr.va_mask |= XFS_AT_SIZE; | |
616 | vattr.va_size = attr->ia_size; | |
617 | } | |
618 | if (ia_valid & ATTR_ATIME) { | |
619 | vattr.va_mask |= XFS_AT_ATIME; | |
620 | vattr.va_atime = attr->ia_atime; | |
621 | } | |
622 | if (ia_valid & ATTR_MTIME) { | |
623 | vattr.va_mask |= XFS_AT_MTIME; | |
624 | vattr.va_mtime = attr->ia_mtime; | |
625 | } | |
626 | if (ia_valid & ATTR_CTIME) { | |
627 | vattr.va_mask |= XFS_AT_CTIME; | |
628 | vattr.va_ctime = attr->ia_ctime; | |
629 | } | |
630 | if (ia_valid & ATTR_MODE) { | |
631 | vattr.va_mask |= XFS_AT_MODE; | |
632 | vattr.va_mode = attr->ia_mode; | |
633 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
634 | inode->i_mode &= ~S_ISGID; | |
635 | } | |
636 | ||
637 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
638 | flags |= ATTR_UTIME; | |
639 | #ifdef ATTR_NO_BLOCK | |
640 | if ((ia_valid & ATTR_NO_BLOCK)) | |
641 | flags |= ATTR_NONBLOCK; | |
642 | #endif | |
643 | ||
644 | VOP_SETATTR(vp, &vattr, flags, NULL, error); | |
645 | if (error) | |
646 | return -error; | |
647 | vn_revalidate(vp); | |
648 | return error; | |
649 | } | |
650 | ||
651 | STATIC void | |
652 | linvfs_truncate( | |
653 | struct inode *inode) | |
654 | { | |
655 | block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block); | |
656 | } | |
657 | ||
658 | STATIC int | |
659 | linvfs_setxattr( | |
660 | struct dentry *dentry, | |
661 | const char *name, | |
662 | const void *data, | |
663 | size_t size, | |
664 | int flags) | |
665 | { | |
666 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
667 | char *attr = (char *)name; | |
668 | attrnames_t *namesp; | |
669 | int xflags = 0; | |
670 | int error; | |
671 | ||
672 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
673 | if (!namesp) | |
674 | return -EOPNOTSUPP; | |
675 | attr += namesp->attr_namelen; | |
676 | error = namesp->attr_capable(vp, NULL); | |
677 | if (error) | |
678 | return error; | |
679 | ||
680 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
681 | if (flags & XATTR_CREATE) | |
682 | xflags |= ATTR_CREATE; | |
683 | if (flags & XATTR_REPLACE) | |
684 | xflags |= ATTR_REPLACE; | |
685 | xflags |= namesp->attr_flag; | |
686 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
687 | } | |
688 | ||
689 | STATIC ssize_t | |
690 | linvfs_getxattr( | |
691 | struct dentry *dentry, | |
692 | const char *name, | |
693 | void *data, | |
694 | size_t size) | |
695 | { | |
696 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
697 | char *attr = (char *)name; | |
698 | attrnames_t *namesp; | |
699 | int xflags = 0; | |
700 | ssize_t error; | |
701 | ||
702 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
703 | if (!namesp) | |
704 | return -EOPNOTSUPP; | |
705 | attr += namesp->attr_namelen; | |
706 | error = namesp->attr_capable(vp, NULL); | |
707 | if (error) | |
708 | return error; | |
709 | ||
710 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
711 | if (!size) { | |
712 | xflags |= ATTR_KERNOVAL; | |
713 | data = NULL; | |
714 | } | |
715 | xflags |= namesp->attr_flag; | |
716 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
717 | } | |
718 | ||
719 | STATIC ssize_t | |
720 | linvfs_listxattr( | |
721 | struct dentry *dentry, | |
722 | char *data, | |
723 | size_t size) | |
724 | { | |
725 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
726 | int error, xflags = ATTR_KERNAMELS; | |
727 | ssize_t result; | |
728 | ||
729 | if (!size) | |
730 | xflags |= ATTR_KERNOVAL; | |
731 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
732 | ||
733 | error = attr_generic_list(vp, data, size, xflags, &result); | |
734 | if (error < 0) | |
735 | return error; | |
736 | return result; | |
737 | } | |
738 | ||
739 | STATIC int | |
740 | linvfs_removexattr( | |
741 | struct dentry *dentry, | |
742 | const char *name) | |
743 | { | |
744 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
745 | char *attr = (char *)name; | |
746 | attrnames_t *namesp; | |
747 | int xflags = 0; | |
748 | int error; | |
749 | ||
750 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
751 | if (!namesp) | |
752 | return -EOPNOTSUPP; | |
753 | attr += namesp->attr_namelen; | |
754 | error = namesp->attr_capable(vp, NULL); | |
755 | if (error) | |
756 | return error; | |
757 | xflags |= namesp->attr_flag; | |
758 | return namesp->attr_remove(vp, attr, xflags); | |
759 | } | |
760 | ||
761 | ||
762 | struct inode_operations linvfs_file_inode_operations = { | |
763 | .permission = linvfs_permission, | |
764 | .truncate = linvfs_truncate, | |
765 | .getattr = linvfs_getattr, | |
766 | .setattr = linvfs_setattr, | |
767 | .setxattr = linvfs_setxattr, | |
768 | .getxattr = linvfs_getxattr, | |
769 | .listxattr = linvfs_listxattr, | |
770 | .removexattr = linvfs_removexattr, | |
771 | }; | |
772 | ||
773 | struct inode_operations linvfs_dir_inode_operations = { | |
774 | .create = linvfs_create, | |
775 | .lookup = linvfs_lookup, | |
776 | .link = linvfs_link, | |
777 | .unlink = linvfs_unlink, | |
778 | .symlink = linvfs_symlink, | |
779 | .mkdir = linvfs_mkdir, | |
780 | .rmdir = linvfs_rmdir, | |
781 | .mknod = linvfs_mknod, | |
782 | .rename = linvfs_rename, | |
783 | .permission = linvfs_permission, | |
784 | .getattr = linvfs_getattr, | |
785 | .setattr = linvfs_setattr, | |
786 | .setxattr = linvfs_setxattr, | |
787 | .getxattr = linvfs_getxattr, | |
788 | .listxattr = linvfs_listxattr, | |
789 | .removexattr = linvfs_removexattr, | |
790 | }; | |
791 | ||
792 | struct inode_operations linvfs_symlink_inode_operations = { | |
793 | .readlink = generic_readlink, | |
794 | .follow_link = linvfs_follow_link, | |
795 | .put_link = linvfs_put_link, | |
796 | .permission = linvfs_permission, | |
797 | .getattr = linvfs_getattr, | |
798 | .setattr = linvfs_setattr, | |
799 | .setxattr = linvfs_setxattr, | |
800 | .getxattr = linvfs_getxattr, | |
801 | .listxattr = linvfs_listxattr, | |
802 | .removexattr = linvfs_removexattr, | |
803 | }; |