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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
1da177e4 LT |
32 | #include "xfs.h" |
33 | #include "xfs_fs.h" | |
a844f451 | 34 | #include "xfs_bit.h" |
1da177e4 | 35 | #include "xfs_log.h" |
a844f451 | 36 | #include "xfs_inum.h" |
1da177e4 LT |
37 | #include "xfs_trans.h" |
38 | #include "xfs_sb.h" | |
39 | #include "xfs_ag.h" | |
40 | #include "xfs_dir.h" | |
41 | #include "xfs_dir2.h" | |
42 | #include "xfs_alloc.h" | |
43 | #include "xfs_dmapi.h" | |
44 | #include "xfs_quota.h" | |
45 | #include "xfs_mount.h" | |
1da177e4 | 46 | #include "xfs_bmap_btree.h" |
a844f451 | 47 | #include "xfs_alloc_btree.h" |
1da177e4 | 48 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
49 | #include "xfs_dir_sf.h" |
50 | #include "xfs_dir2_sf.h" | |
a844f451 | 51 | #include "xfs_attr_sf.h" |
1da177e4 LT |
52 | #include "xfs_dinode.h" |
53 | #include "xfs_inode.h" | |
54 | #include "xfs_bmap.h" | |
a844f451 NS |
55 | #include "xfs_btree.h" |
56 | #include "xfs_ialloc.h" | |
1da177e4 LT |
57 | #include "xfs_rtalloc.h" |
58 | #include "xfs_error.h" | |
59 | #include "xfs_itable.h" | |
60 | #include "xfs_rw.h" | |
61 | #include "xfs_acl.h" | |
62 | #include "xfs_cap.h" | |
63 | #include "xfs_mac.h" | |
64 | #include "xfs_attr.h" | |
65 | #include "xfs_buf_item.h" | |
66 | #include "xfs_utils.h" | |
67 | ||
68 | #include <linux/xattr.h> | |
69 | #include <linux/namei.h> | |
70 | ||
4aeb664c NS |
71 | /* |
72 | * Change the requested timestamp in the given inode. | |
73 | * We don't lock across timestamp updates, and we don't log them but | |
74 | * we do record the fact that there is dirty information in core. | |
75 | * | |
76 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
77 | * with XFS_ICHGTIME_ACC to be sure that access time | |
78 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
79 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
80 | * timestamp if the filesystem is mounted noacctm. | |
81 | */ | |
82 | void | |
83 | xfs_ichgtime( | |
84 | xfs_inode_t *ip, | |
85 | int flags) | |
86 | { | |
87 | struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); | |
88 | timespec_t tv; | |
89 | ||
90 | /* | |
91 | * We're not supposed to change timestamps in readonly-mounted | |
92 | * filesystems. Throw it away if anyone asks us. | |
93 | */ | |
94 | if (unlikely(IS_RDONLY(inode))) | |
95 | return; | |
96 | ||
97 | /* | |
98 | * Don't update access timestamps on reads if mounted "noatime". | |
99 | * Throw it away if anyone asks us. | |
100 | */ | |
101 | if (unlikely( | |
102 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
103 | (flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
104 | XFS_ICHGTIME_ACC)) | |
105 | return; | |
106 | ||
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; | |
135 | if (!(inode->i_state & I_LOCK)) | |
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). | |
143 | * We also skip the readonly and noatime checks here, they are | |
144 | * also catered for already. | |
145 | */ | |
146 | void | |
147 | xfs_ichgtime_fast( | |
148 | xfs_inode_t *ip, | |
149 | struct inode *inode, | |
150 | int flags) | |
151 | { | |
152 | timespec_t *tvp; | |
153 | ||
154 | /* | |
155 | * We're not supposed to change timestamps in readonly-mounted | |
156 | * filesystems. Throw it away if anyone asks us. | |
157 | */ | |
158 | if (unlikely(IS_RDONLY(inode))) | |
159 | return; | |
160 | ||
161 | /* | |
162 | * Don't update access timestamps on reads if mounted "noatime". | |
163 | * Throw it away if anyone asks us. | |
164 | */ | |
165 | if (unlikely( | |
166 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
167 | ((flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
168 | XFS_ICHGTIME_ACC))) | |
169 | return; | |
170 | ||
171 | if (flags & XFS_ICHGTIME_MOD) { | |
172 | tvp = &inode->i_mtime; | |
173 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
174 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
175 | } | |
176 | if (flags & XFS_ICHGTIME_ACC) { | |
177 | tvp = &inode->i_atime; | |
178 | ip->i_d.di_atime.t_sec = (__int32_t)tvp->tv_sec; | |
179 | ip->i_d.di_atime.t_nsec = (__int32_t)tvp->tv_nsec; | |
180 | } | |
181 | if (flags & XFS_ICHGTIME_CHG) { | |
182 | tvp = &inode->i_ctime; | |
183 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
184 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
185 | } | |
186 | ||
187 | /* | |
188 | * We update the i_update_core field _after_ changing | |
189 | * the timestamps in order to coordinate properly with | |
190 | * xfs_iflush() so that we don't lose timestamp updates. | |
191 | * This keeps us from having to hold the inode lock | |
192 | * while doing this. We use the SYNCHRONIZE macro to | |
193 | * ensure that the compiler does not reorder the update | |
194 | * of i_update_core above the timestamp updates above. | |
195 | */ | |
196 | SYNCHRONIZE(); | |
197 | ip->i_update_core = 1; | |
198 | if (!(inode->i_state & I_LOCK)) | |
199 | mark_inode_dirty_sync(inode); | |
200 | } | |
201 | ||
1da177e4 LT |
202 | |
203 | /* | |
204 | * Pull the link count and size up from the xfs inode to the linux inode | |
205 | */ | |
206 | STATIC void | |
207 | validate_fields( | |
208 | struct inode *ip) | |
209 | { | |
210 | vnode_t *vp = LINVFS_GET_VP(ip); | |
211 | vattr_t va; | |
212 | int error; | |
213 | ||
214 | va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; | |
215 | VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error); | |
216 | if (likely(!error)) { | |
217 | ip->i_nlink = va.va_nlink; | |
218 | ip->i_blocks = va.va_nblocks; | |
219 | ||
220 | /* we're under i_sem so i_size can't change under us */ | |
221 | if (i_size_read(ip) != va.va_size) | |
222 | i_size_write(ip, va.va_size); | |
223 | } | |
224 | } | |
225 | ||
226 | /* | |
227 | * Determine whether a process has a valid fs_struct (kernel daemons | |
228 | * like knfsd don't have an fs_struct). | |
229 | * | |
230 | * XXX(hch): nfsd is broken, better fix it instead. | |
231 | */ | |
232 | STATIC inline int | |
233 | has_fs_struct(struct task_struct *task) | |
234 | { | |
235 | return (task->fs != init_task.fs); | |
236 | } | |
237 | ||
238 | STATIC int | |
239 | linvfs_mknod( | |
240 | struct inode *dir, | |
241 | struct dentry *dentry, | |
242 | int mode, | |
243 | dev_t rdev) | |
244 | { | |
245 | struct inode *ip; | |
246 | vattr_t va; | |
247 | vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir); | |
248 | xfs_acl_t *default_acl = NULL; | |
249 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
250 | int error; | |
251 | ||
252 | /* | |
253 | * Irix uses Missed'em'V split, but doesn't want to see | |
254 | * the upper 5 bits of (14bit) major. | |
255 | */ | |
256 | if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff) | |
257 | return -EINVAL; | |
258 | ||
259 | if (test_default_acl && test_default_acl(dvp)) { | |
260 | if (!_ACL_ALLOC(default_acl)) | |
261 | return -ENOMEM; | |
262 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { | |
263 | _ACL_FREE(default_acl); | |
264 | default_acl = NULL; | |
265 | } | |
266 | } | |
267 | ||
268 | if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current)) | |
269 | mode &= ~current->fs->umask; | |
270 | ||
271 | memset(&va, 0, sizeof(va)); | |
272 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; | |
1da177e4 LT |
273 | va.va_mode = mode; |
274 | ||
275 | switch (mode & S_IFMT) { | |
276 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
277 | va.va_rdev = sysv_encode_dev(rdev); | |
278 | va.va_mask |= XFS_AT_RDEV; | |
279 | /*FALLTHROUGH*/ | |
280 | case S_IFREG: | |
281 | VOP_CREATE(dvp, dentry, &va, &vp, NULL, error); | |
282 | break; | |
283 | case S_IFDIR: | |
284 | VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error); | |
285 | break; | |
286 | default: | |
287 | error = EINVAL; | |
288 | break; | |
289 | } | |
290 | ||
291 | if (default_acl) { | |
292 | if (!error) { | |
293 | error = _ACL_INHERIT(vp, &va, default_acl); | |
294 | if (!error) { | |
295 | VMODIFY(vp); | |
296 | } else { | |
297 | struct dentry teardown = {}; | |
298 | int err2; | |
299 | ||
300 | /* Oh, the horror. | |
301 | * If we can't add the ACL we must back out. | |
302 | * ENOSPC can hit here, among other things. | |
303 | */ | |
304 | teardown.d_inode = ip = LINVFS_GET_IP(vp); | |
305 | teardown.d_name = dentry->d_name; | |
306 | ||
307 | vn_mark_bad(vp); | |
308 | ||
309 | if (S_ISDIR(mode)) | |
310 | VOP_RMDIR(dvp, &teardown, NULL, err2); | |
311 | else | |
312 | VOP_REMOVE(dvp, &teardown, NULL, err2); | |
313 | VN_RELE(vp); | |
314 | } | |
315 | } | |
316 | _ACL_FREE(default_acl); | |
317 | } | |
318 | ||
319 | if (!error) { | |
320 | ASSERT(vp); | |
321 | ip = LINVFS_GET_IP(vp); | |
322 | ||
323 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
324 | ip->i_rdev = rdev; | |
325 | else if (S_ISDIR(mode)) | |
326 | validate_fields(ip); | |
327 | d_instantiate(dentry, ip); | |
328 | validate_fields(dir); | |
329 | } | |
330 | return -error; | |
331 | } | |
332 | ||
333 | STATIC int | |
334 | linvfs_create( | |
335 | struct inode *dir, | |
336 | struct dentry *dentry, | |
337 | int mode, | |
338 | struct nameidata *nd) | |
339 | { | |
340 | return linvfs_mknod(dir, dentry, mode, 0); | |
341 | } | |
342 | ||
343 | STATIC int | |
344 | linvfs_mkdir( | |
345 | struct inode *dir, | |
346 | struct dentry *dentry, | |
347 | int mode) | |
348 | { | |
349 | return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0); | |
350 | } | |
351 | ||
352 | STATIC struct dentry * | |
353 | linvfs_lookup( | |
354 | struct inode *dir, | |
355 | struct dentry *dentry, | |
356 | struct nameidata *nd) | |
357 | { | |
358 | struct vnode *vp = LINVFS_GET_VP(dir), *cvp; | |
359 | int error; | |
360 | ||
361 | if (dentry->d_name.len >= MAXNAMELEN) | |
362 | return ERR_PTR(-ENAMETOOLONG); | |
363 | ||
364 | VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error); | |
365 | if (error) { | |
366 | if (unlikely(error != ENOENT)) | |
367 | return ERR_PTR(-error); | |
368 | d_add(dentry, NULL); | |
369 | return NULL; | |
370 | } | |
371 | ||
372 | return d_splice_alias(LINVFS_GET_IP(cvp), dentry); | |
373 | } | |
374 | ||
375 | STATIC int | |
376 | linvfs_link( | |
377 | struct dentry *old_dentry, | |
378 | struct inode *dir, | |
379 | struct dentry *dentry) | |
380 | { | |
381 | struct inode *ip; /* inode of guy being linked to */ | |
382 | vnode_t *tdvp; /* target directory for new name/link */ | |
383 | vnode_t *vp; /* vp of name being linked */ | |
384 | int error; | |
385 | ||
386 | ip = old_dentry->d_inode; /* inode being linked to */ | |
387 | if (S_ISDIR(ip->i_mode)) | |
388 | return -EPERM; | |
389 | ||
390 | tdvp = LINVFS_GET_VP(dir); | |
391 | vp = LINVFS_GET_VP(ip); | |
392 | ||
393 | VOP_LINK(tdvp, vp, dentry, NULL, error); | |
394 | if (!error) { | |
395 | VMODIFY(tdvp); | |
396 | VN_HOLD(vp); | |
397 | validate_fields(ip); | |
398 | d_instantiate(dentry, ip); | |
399 | } | |
400 | return -error; | |
401 | } | |
402 | ||
403 | STATIC int | |
404 | linvfs_unlink( | |
405 | struct inode *dir, | |
406 | struct dentry *dentry) | |
407 | { | |
408 | struct inode *inode; | |
409 | vnode_t *dvp; /* directory containing name to remove */ | |
410 | int error; | |
411 | ||
412 | inode = dentry->d_inode; | |
413 | dvp = LINVFS_GET_VP(dir); | |
414 | ||
415 | VOP_REMOVE(dvp, dentry, NULL, error); | |
416 | if (!error) { | |
417 | validate_fields(dir); /* For size only */ | |
418 | validate_fields(inode); | |
419 | } | |
420 | ||
421 | return -error; | |
422 | } | |
423 | ||
424 | STATIC int | |
425 | linvfs_symlink( | |
426 | struct inode *dir, | |
427 | struct dentry *dentry, | |
428 | const char *symname) | |
429 | { | |
430 | struct inode *ip; | |
431 | vattr_t va; | |
432 | vnode_t *dvp; /* directory containing name of symlink */ | |
433 | vnode_t *cvp; /* used to lookup symlink to put in dentry */ | |
434 | int error; | |
435 | ||
436 | dvp = LINVFS_GET_VP(dir); | |
437 | cvp = NULL; | |
438 | ||
439 | memset(&va, 0, sizeof(va)); | |
0432dab2 CH |
440 | va.va_mode = S_IFLNK | |
441 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); | |
1da177e4 LT |
442 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
443 | ||
444 | error = 0; | |
445 | VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error); | |
446 | if (!error && cvp) { | |
1da177e4 LT |
447 | ip = LINVFS_GET_IP(cvp); |
448 | d_instantiate(dentry, ip); | |
449 | validate_fields(dir); | |
450 | validate_fields(ip); /* size needs update */ | |
451 | } | |
452 | return -error; | |
453 | } | |
454 | ||
455 | STATIC int | |
456 | linvfs_rmdir( | |
457 | struct inode *dir, | |
458 | struct dentry *dentry) | |
459 | { | |
460 | struct inode *inode = dentry->d_inode; | |
461 | vnode_t *dvp = LINVFS_GET_VP(dir); | |
462 | int error; | |
463 | ||
464 | VOP_RMDIR(dvp, dentry, NULL, error); | |
465 | if (!error) { | |
466 | validate_fields(inode); | |
467 | validate_fields(dir); | |
468 | } | |
469 | return -error; | |
470 | } | |
471 | ||
472 | STATIC int | |
473 | linvfs_rename( | |
474 | struct inode *odir, | |
475 | struct dentry *odentry, | |
476 | struct inode *ndir, | |
477 | struct dentry *ndentry) | |
478 | { | |
479 | struct inode *new_inode = ndentry->d_inode; | |
480 | vnode_t *fvp; /* from directory */ | |
481 | vnode_t *tvp; /* target directory */ | |
482 | int error; | |
483 | ||
484 | fvp = LINVFS_GET_VP(odir); | |
485 | tvp = LINVFS_GET_VP(ndir); | |
486 | ||
487 | VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error); | |
488 | if (error) | |
489 | return -error; | |
490 | ||
491 | if (new_inode) | |
492 | validate_fields(new_inode); | |
493 | ||
494 | validate_fields(odir); | |
495 | if (ndir != odir) | |
496 | validate_fields(ndir); | |
497 | return 0; | |
498 | } | |
499 | ||
500 | /* | |
501 | * careful here - this function can get called recursively, so | |
502 | * we need to be very careful about how much stack we use. | |
503 | * uio is kmalloced for this reason... | |
504 | */ | |
008b150a | 505 | STATIC void * |
1da177e4 LT |
506 | linvfs_follow_link( |
507 | struct dentry *dentry, | |
508 | struct nameidata *nd) | |
509 | { | |
510 | vnode_t *vp; | |
511 | uio_t *uio; | |
512 | iovec_t iov; | |
513 | int error; | |
514 | char *link; | |
515 | ||
516 | ASSERT(dentry); | |
517 | ASSERT(nd); | |
518 | ||
519 | link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL); | |
520 | if (!link) { | |
521 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 522 | return NULL; |
1da177e4 LT |
523 | } |
524 | ||
525 | uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL); | |
526 | if (!uio) { | |
527 | kfree(link); | |
528 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 529 | return NULL; |
1da177e4 LT |
530 | } |
531 | ||
532 | vp = LINVFS_GET_VP(dentry->d_inode); | |
533 | ||
534 | iov.iov_base = link; | |
535 | iov.iov_len = MAXNAMELEN; | |
536 | ||
537 | uio->uio_iov = &iov; | |
538 | uio->uio_offset = 0; | |
539 | uio->uio_segflg = UIO_SYSSPACE; | |
540 | uio->uio_resid = MAXNAMELEN; | |
541 | uio->uio_iovcnt = 1; | |
542 | ||
543 | VOP_READLINK(vp, uio, 0, NULL, error); | |
544 | if (error) { | |
545 | kfree(link); | |
546 | link = ERR_PTR(-error); | |
547 | } else { | |
548 | link[MAXNAMELEN - uio->uio_resid] = '\0'; | |
549 | } | |
550 | kfree(uio); | |
551 | ||
552 | nd_set_link(nd, link); | |
008b150a | 553 | return NULL; |
1da177e4 LT |
554 | } |
555 | ||
cde410a9 NS |
556 | STATIC void |
557 | linvfs_put_link( | |
558 | struct dentry *dentry, | |
559 | struct nameidata *nd, | |
560 | void *p) | |
1da177e4 | 561 | { |
cde410a9 NS |
562 | char *s = nd_get_link(nd); |
563 | ||
1da177e4 LT |
564 | if (!IS_ERR(s)) |
565 | kfree(s); | |
566 | } | |
567 | ||
568 | #ifdef CONFIG_XFS_POSIX_ACL | |
569 | STATIC int | |
570 | linvfs_permission( | |
571 | struct inode *inode, | |
572 | int mode, | |
573 | struct nameidata *nd) | |
574 | { | |
575 | vnode_t *vp = LINVFS_GET_VP(inode); | |
576 | int error; | |
577 | ||
578 | mode <<= 6; /* convert from linux to vnode access bits */ | |
579 | VOP_ACCESS(vp, mode, NULL, error); | |
580 | return -error; | |
581 | } | |
582 | #else | |
583 | #define linvfs_permission NULL | |
584 | #endif | |
585 | ||
586 | STATIC int | |
587 | linvfs_getattr( | |
588 | struct vfsmount *mnt, | |
589 | struct dentry *dentry, | |
590 | struct kstat *stat) | |
591 | { | |
592 | struct inode *inode = dentry->d_inode; | |
593 | vnode_t *vp = LINVFS_GET_VP(inode); | |
594 | int error = 0; | |
595 | ||
596 | if (unlikely(vp->v_flag & VMODIFIED)) | |
597 | error = vn_revalidate(vp); | |
598 | if (!error) | |
599 | generic_fillattr(inode, stat); | |
600 | return 0; | |
601 | } | |
602 | ||
603 | STATIC int | |
604 | linvfs_setattr( | |
605 | struct dentry *dentry, | |
606 | struct iattr *attr) | |
607 | { | |
608 | struct inode *inode = dentry->d_inode; | |
609 | unsigned int ia_valid = attr->ia_valid; | |
610 | vnode_t *vp = LINVFS_GET_VP(inode); | |
611 | vattr_t vattr; | |
612 | int flags = 0; | |
613 | int error; | |
614 | ||
615 | memset(&vattr, 0, sizeof(vattr_t)); | |
616 | if (ia_valid & ATTR_UID) { | |
617 | vattr.va_mask |= XFS_AT_UID; | |
618 | vattr.va_uid = attr->ia_uid; | |
619 | } | |
620 | if (ia_valid & ATTR_GID) { | |
621 | vattr.va_mask |= XFS_AT_GID; | |
622 | vattr.va_gid = attr->ia_gid; | |
623 | } | |
624 | if (ia_valid & ATTR_SIZE) { | |
625 | vattr.va_mask |= XFS_AT_SIZE; | |
626 | vattr.va_size = attr->ia_size; | |
627 | } | |
628 | if (ia_valid & ATTR_ATIME) { | |
629 | vattr.va_mask |= XFS_AT_ATIME; | |
630 | vattr.va_atime = attr->ia_atime; | |
631 | } | |
632 | if (ia_valid & ATTR_MTIME) { | |
633 | vattr.va_mask |= XFS_AT_MTIME; | |
634 | vattr.va_mtime = attr->ia_mtime; | |
635 | } | |
636 | if (ia_valid & ATTR_CTIME) { | |
637 | vattr.va_mask |= XFS_AT_CTIME; | |
638 | vattr.va_ctime = attr->ia_ctime; | |
639 | } | |
640 | if (ia_valid & ATTR_MODE) { | |
641 | vattr.va_mask |= XFS_AT_MODE; | |
642 | vattr.va_mode = attr->ia_mode; | |
643 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
644 | inode->i_mode &= ~S_ISGID; | |
645 | } | |
646 | ||
647 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
648 | flags |= ATTR_UTIME; | |
649 | #ifdef ATTR_NO_BLOCK | |
650 | if ((ia_valid & ATTR_NO_BLOCK)) | |
651 | flags |= ATTR_NONBLOCK; | |
652 | #endif | |
653 | ||
654 | VOP_SETATTR(vp, &vattr, flags, NULL, error); | |
655 | if (error) | |
656 | return -error; | |
657 | vn_revalidate(vp); | |
658 | return error; | |
659 | } | |
660 | ||
661 | STATIC void | |
662 | linvfs_truncate( | |
663 | struct inode *inode) | |
664 | { | |
665 | block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block); | |
666 | } | |
667 | ||
668 | STATIC int | |
669 | linvfs_setxattr( | |
670 | struct dentry *dentry, | |
671 | const char *name, | |
672 | const void *data, | |
673 | size_t size, | |
674 | int flags) | |
675 | { | |
676 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
677 | char *attr = (char *)name; | |
678 | attrnames_t *namesp; | |
679 | int xflags = 0; | |
680 | int error; | |
681 | ||
682 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
683 | if (!namesp) | |
684 | return -EOPNOTSUPP; | |
685 | attr += namesp->attr_namelen; | |
686 | error = namesp->attr_capable(vp, NULL); | |
687 | if (error) | |
688 | return error; | |
689 | ||
690 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
691 | if (flags & XATTR_CREATE) | |
692 | xflags |= ATTR_CREATE; | |
693 | if (flags & XATTR_REPLACE) | |
694 | xflags |= ATTR_REPLACE; | |
695 | xflags |= namesp->attr_flag; | |
696 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
697 | } | |
698 | ||
699 | STATIC ssize_t | |
700 | linvfs_getxattr( | |
701 | struct dentry *dentry, | |
702 | const char *name, | |
703 | void *data, | |
704 | size_t size) | |
705 | { | |
706 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
707 | char *attr = (char *)name; | |
708 | attrnames_t *namesp; | |
709 | int xflags = 0; | |
710 | ssize_t error; | |
711 | ||
712 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
713 | if (!namesp) | |
714 | return -EOPNOTSUPP; | |
715 | attr += namesp->attr_namelen; | |
716 | error = namesp->attr_capable(vp, NULL); | |
717 | if (error) | |
718 | return error; | |
719 | ||
720 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
721 | if (!size) { | |
722 | xflags |= ATTR_KERNOVAL; | |
723 | data = NULL; | |
724 | } | |
725 | xflags |= namesp->attr_flag; | |
726 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
727 | } | |
728 | ||
729 | STATIC ssize_t | |
730 | linvfs_listxattr( | |
731 | struct dentry *dentry, | |
732 | char *data, | |
733 | size_t size) | |
734 | { | |
735 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
736 | int error, xflags = ATTR_KERNAMELS; | |
737 | ssize_t result; | |
738 | ||
739 | if (!size) | |
740 | xflags |= ATTR_KERNOVAL; | |
741 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
742 | ||
743 | error = attr_generic_list(vp, data, size, xflags, &result); | |
744 | if (error < 0) | |
745 | return error; | |
746 | return result; | |
747 | } | |
748 | ||
749 | STATIC int | |
750 | linvfs_removexattr( | |
751 | struct dentry *dentry, | |
752 | const char *name) | |
753 | { | |
754 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
755 | char *attr = (char *)name; | |
756 | attrnames_t *namesp; | |
757 | int xflags = 0; | |
758 | int error; | |
759 | ||
760 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
761 | if (!namesp) | |
762 | return -EOPNOTSUPP; | |
763 | attr += namesp->attr_namelen; | |
764 | error = namesp->attr_capable(vp, NULL); | |
765 | if (error) | |
766 | return error; | |
767 | xflags |= namesp->attr_flag; | |
768 | return namesp->attr_remove(vp, attr, xflags); | |
769 | } | |
770 | ||
771 | ||
772 | struct inode_operations linvfs_file_inode_operations = { | |
773 | .permission = linvfs_permission, | |
774 | .truncate = linvfs_truncate, | |
775 | .getattr = linvfs_getattr, | |
776 | .setattr = linvfs_setattr, | |
777 | .setxattr = linvfs_setxattr, | |
778 | .getxattr = linvfs_getxattr, | |
779 | .listxattr = linvfs_listxattr, | |
780 | .removexattr = linvfs_removexattr, | |
781 | }; | |
782 | ||
783 | struct inode_operations linvfs_dir_inode_operations = { | |
784 | .create = linvfs_create, | |
785 | .lookup = linvfs_lookup, | |
786 | .link = linvfs_link, | |
787 | .unlink = linvfs_unlink, | |
788 | .symlink = linvfs_symlink, | |
789 | .mkdir = linvfs_mkdir, | |
790 | .rmdir = linvfs_rmdir, | |
791 | .mknod = linvfs_mknod, | |
792 | .rename = linvfs_rename, | |
793 | .permission = linvfs_permission, | |
794 | .getattr = linvfs_getattr, | |
795 | .setattr = linvfs_setattr, | |
796 | .setxattr = linvfs_setxattr, | |
797 | .getxattr = linvfs_getxattr, | |
798 | .listxattr = linvfs_listxattr, | |
799 | .removexattr = linvfs_removexattr, | |
800 | }; | |
801 | ||
802 | struct inode_operations linvfs_symlink_inode_operations = { | |
803 | .readlink = generic_readlink, | |
804 | .follow_link = linvfs_follow_link, | |
805 | .put_link = linvfs_put_link, | |
806 | .permission = linvfs_permission, | |
807 | .getattr = linvfs_getattr, | |
808 | .setattr = linvfs_setattr, | |
809 | .setxattr = linvfs_setxattr, | |
810 | .getxattr = linvfs_getxattr, | |
811 | .listxattr = linvfs_listxattr, | |
812 | .removexattr = linvfs_removexattr, | |
813 | }; |