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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 | */ | |
32 | ||
33 | #include "xfs.h" | |
34 | #include "xfs_fs.h" | |
35 | #include "xfs_inum.h" | |
36 | #include "xfs_log.h" | |
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" | |
46 | #include "xfs_alloc_btree.h" | |
47 | #include "xfs_bmap_btree.h" | |
48 | #include "xfs_ialloc_btree.h" | |
49 | #include "xfs_btree.h" | |
50 | #include "xfs_ialloc.h" | |
51 | #include "xfs_attr_sf.h" | |
52 | #include "xfs_dir_sf.h" | |
53 | #include "xfs_dir2_sf.h" | |
54 | #include "xfs_dinode.h" | |
55 | #include "xfs_inode.h" | |
56 | #include "xfs_bmap.h" | |
57 | #include "xfs_bit.h" | |
58 | #include "xfs_rtalloc.h" | |
59 | #include "xfs_error.h" | |
60 | #include "xfs_itable.h" | |
61 | #include "xfs_rw.h" | |
62 | #include "xfs_acl.h" | |
63 | #include "xfs_cap.h" | |
64 | #include "xfs_mac.h" | |
65 | #include "xfs_attr.h" | |
66 | #include "xfs_buf_item.h" | |
67 | #include "xfs_utils.h" | |
68 | ||
69 | #include <linux/xattr.h> | |
70 | #include <linux/namei.h> | |
71 | ||
4aeb664c NS |
72 | /* |
73 | * Change the requested timestamp in the given inode. | |
74 | * We don't lock across timestamp updates, and we don't log them but | |
75 | * we do record the fact that there is dirty information in core. | |
76 | * | |
77 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
78 | * with XFS_ICHGTIME_ACC to be sure that access time | |
79 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
80 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
81 | * timestamp if the filesystem is mounted noacctm. | |
82 | */ | |
83 | void | |
84 | xfs_ichgtime( | |
85 | xfs_inode_t *ip, | |
86 | int flags) | |
87 | { | |
88 | struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); | |
89 | timespec_t tv; | |
90 | ||
91 | /* | |
92 | * We're not supposed to change timestamps in readonly-mounted | |
93 | * filesystems. Throw it away if anyone asks us. | |
94 | */ | |
95 | if (unlikely(IS_RDONLY(inode))) | |
96 | return; | |
97 | ||
98 | /* | |
99 | * Don't update access timestamps on reads if mounted "noatime". | |
100 | * Throw it away if anyone asks us. | |
101 | */ | |
102 | if (unlikely( | |
103 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
104 | (flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
105 | XFS_ICHGTIME_ACC)) | |
106 | return; | |
107 | ||
108 | nanotime(&tv); | |
109 | if (flags & XFS_ICHGTIME_MOD) { | |
110 | inode->i_mtime = tv; | |
111 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
112 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
113 | } | |
114 | if (flags & XFS_ICHGTIME_ACC) { | |
115 | inode->i_atime = tv; | |
116 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
117 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
118 | } | |
119 | if (flags & XFS_ICHGTIME_CHG) { | |
120 | inode->i_ctime = tv; | |
121 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
122 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
123 | } | |
124 | ||
125 | /* | |
126 | * We update the i_update_core field _after_ changing | |
127 | * the timestamps in order to coordinate properly with | |
128 | * xfs_iflush() so that we don't lose timestamp updates. | |
129 | * This keeps us from having to hold the inode lock | |
130 | * while doing this. We use the SYNCHRONIZE macro to | |
131 | * ensure that the compiler does not reorder the update | |
132 | * of i_update_core above the timestamp updates above. | |
133 | */ | |
134 | SYNCHRONIZE(); | |
135 | ip->i_update_core = 1; | |
136 | if (!(inode->i_state & I_LOCK)) | |
137 | mark_inode_dirty_sync(inode); | |
138 | } | |
139 | ||
140 | /* | |
141 | * Variant on the above which avoids querying the system clock | |
142 | * in situations where we know the Linux inode timestamps have | |
143 | * just been updated (and so we can update our inode cheaply). | |
144 | * We also skip the readonly and noatime checks here, they are | |
145 | * also catered for already. | |
146 | */ | |
147 | void | |
148 | xfs_ichgtime_fast( | |
149 | xfs_inode_t *ip, | |
150 | struct inode *inode, | |
151 | int flags) | |
152 | { | |
153 | timespec_t *tvp; | |
154 | ||
155 | /* | |
156 | * We're not supposed to change timestamps in readonly-mounted | |
157 | * filesystems. Throw it away if anyone asks us. | |
158 | */ | |
159 | if (unlikely(IS_RDONLY(inode))) | |
160 | return; | |
161 | ||
162 | /* | |
163 | * Don't update access timestamps on reads if mounted "noatime". | |
164 | * Throw it away if anyone asks us. | |
165 | */ | |
166 | if (unlikely( | |
167 | (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && | |
168 | ((flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == | |
169 | XFS_ICHGTIME_ACC))) | |
170 | return; | |
171 | ||
172 | if (flags & XFS_ICHGTIME_MOD) { | |
173 | tvp = &inode->i_mtime; | |
174 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
175 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
176 | } | |
177 | if (flags & XFS_ICHGTIME_ACC) { | |
178 | tvp = &inode->i_atime; | |
179 | ip->i_d.di_atime.t_sec = (__int32_t)tvp->tv_sec; | |
180 | ip->i_d.di_atime.t_nsec = (__int32_t)tvp->tv_nsec; | |
181 | } | |
182 | if (flags & XFS_ICHGTIME_CHG) { | |
183 | tvp = &inode->i_ctime; | |
184 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
185 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
186 | } | |
187 | ||
188 | /* | |
189 | * We update the i_update_core field _after_ changing | |
190 | * the timestamps in order to coordinate properly with | |
191 | * xfs_iflush() so that we don't lose timestamp updates. | |
192 | * This keeps us from having to hold the inode lock | |
193 | * while doing this. We use the SYNCHRONIZE macro to | |
194 | * ensure that the compiler does not reorder the update | |
195 | * of i_update_core above the timestamp updates above. | |
196 | */ | |
197 | SYNCHRONIZE(); | |
198 | ip->i_update_core = 1; | |
199 | if (!(inode->i_state & I_LOCK)) | |
200 | mark_inode_dirty_sync(inode); | |
201 | } | |
202 | ||
1da177e4 LT |
203 | |
204 | /* | |
205 | * Pull the link count and size up from the xfs inode to the linux inode | |
206 | */ | |
207 | STATIC void | |
208 | validate_fields( | |
209 | struct inode *ip) | |
210 | { | |
211 | vnode_t *vp = LINVFS_GET_VP(ip); | |
212 | vattr_t va; | |
213 | int error; | |
214 | ||
215 | va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; | |
216 | VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error); | |
217 | if (likely(!error)) { | |
218 | ip->i_nlink = va.va_nlink; | |
219 | ip->i_blocks = va.va_nblocks; | |
220 | ||
221 | /* we're under i_sem so i_size can't change under us */ | |
222 | if (i_size_read(ip) != va.va_size) | |
223 | i_size_write(ip, va.va_size); | |
224 | } | |
225 | } | |
226 | ||
227 | /* | |
228 | * Determine whether a process has a valid fs_struct (kernel daemons | |
229 | * like knfsd don't have an fs_struct). | |
230 | * | |
231 | * XXX(hch): nfsd is broken, better fix it instead. | |
232 | */ | |
233 | STATIC inline int | |
234 | has_fs_struct(struct task_struct *task) | |
235 | { | |
236 | return (task->fs != init_task.fs); | |
237 | } | |
238 | ||
239 | STATIC int | |
240 | linvfs_mknod( | |
241 | struct inode *dir, | |
242 | struct dentry *dentry, | |
243 | int mode, | |
244 | dev_t rdev) | |
245 | { | |
246 | struct inode *ip; | |
247 | vattr_t va; | |
248 | vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir); | |
249 | xfs_acl_t *default_acl = NULL; | |
250 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
251 | int error; | |
252 | ||
253 | /* | |
254 | * Irix uses Missed'em'V split, but doesn't want to see | |
255 | * the upper 5 bits of (14bit) major. | |
256 | */ | |
257 | if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff) | |
258 | return -EINVAL; | |
259 | ||
260 | if (test_default_acl && test_default_acl(dvp)) { | |
261 | if (!_ACL_ALLOC(default_acl)) | |
262 | return -ENOMEM; | |
263 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { | |
264 | _ACL_FREE(default_acl); | |
265 | default_acl = NULL; | |
266 | } | |
267 | } | |
268 | ||
269 | if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current)) | |
270 | mode &= ~current->fs->umask; | |
271 | ||
272 | memset(&va, 0, sizeof(va)); | |
273 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; | |
1da177e4 LT |
274 | va.va_mode = mode; |
275 | ||
276 | switch (mode & S_IFMT) { | |
277 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
278 | va.va_rdev = sysv_encode_dev(rdev); | |
279 | va.va_mask |= XFS_AT_RDEV; | |
280 | /*FALLTHROUGH*/ | |
281 | case S_IFREG: | |
282 | VOP_CREATE(dvp, dentry, &va, &vp, NULL, error); | |
283 | break; | |
284 | case S_IFDIR: | |
285 | VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error); | |
286 | break; | |
287 | default: | |
288 | error = EINVAL; | |
289 | break; | |
290 | } | |
291 | ||
292 | if (default_acl) { | |
293 | if (!error) { | |
294 | error = _ACL_INHERIT(vp, &va, default_acl); | |
295 | if (!error) { | |
296 | VMODIFY(vp); | |
297 | } else { | |
298 | struct dentry teardown = {}; | |
299 | int err2; | |
300 | ||
301 | /* Oh, the horror. | |
302 | * If we can't add the ACL we must back out. | |
303 | * ENOSPC can hit here, among other things. | |
304 | */ | |
305 | teardown.d_inode = ip = LINVFS_GET_IP(vp); | |
306 | teardown.d_name = dentry->d_name; | |
307 | ||
308 | vn_mark_bad(vp); | |
309 | ||
310 | if (S_ISDIR(mode)) | |
311 | VOP_RMDIR(dvp, &teardown, NULL, err2); | |
312 | else | |
313 | VOP_REMOVE(dvp, &teardown, NULL, err2); | |
314 | VN_RELE(vp); | |
315 | } | |
316 | } | |
317 | _ACL_FREE(default_acl); | |
318 | } | |
319 | ||
320 | if (!error) { | |
321 | ASSERT(vp); | |
322 | ip = LINVFS_GET_IP(vp); | |
323 | ||
324 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
325 | ip->i_rdev = rdev; | |
326 | else if (S_ISDIR(mode)) | |
327 | validate_fields(ip); | |
328 | d_instantiate(dentry, ip); | |
329 | validate_fields(dir); | |
330 | } | |
331 | return -error; | |
332 | } | |
333 | ||
334 | STATIC int | |
335 | linvfs_create( | |
336 | struct inode *dir, | |
337 | struct dentry *dentry, | |
338 | int mode, | |
339 | struct nameidata *nd) | |
340 | { | |
341 | return linvfs_mknod(dir, dentry, mode, 0); | |
342 | } | |
343 | ||
344 | STATIC int | |
345 | linvfs_mkdir( | |
346 | struct inode *dir, | |
347 | struct dentry *dentry, | |
348 | int mode) | |
349 | { | |
350 | return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0); | |
351 | } | |
352 | ||
353 | STATIC struct dentry * | |
354 | linvfs_lookup( | |
355 | struct inode *dir, | |
356 | struct dentry *dentry, | |
357 | struct nameidata *nd) | |
358 | { | |
359 | struct vnode *vp = LINVFS_GET_VP(dir), *cvp; | |
360 | int error; | |
361 | ||
362 | if (dentry->d_name.len >= MAXNAMELEN) | |
363 | return ERR_PTR(-ENAMETOOLONG); | |
364 | ||
365 | VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error); | |
366 | if (error) { | |
367 | if (unlikely(error != ENOENT)) | |
368 | return ERR_PTR(-error); | |
369 | d_add(dentry, NULL); | |
370 | return NULL; | |
371 | } | |
372 | ||
373 | return d_splice_alias(LINVFS_GET_IP(cvp), dentry); | |
374 | } | |
375 | ||
376 | STATIC int | |
377 | linvfs_link( | |
378 | struct dentry *old_dentry, | |
379 | struct inode *dir, | |
380 | struct dentry *dentry) | |
381 | { | |
382 | struct inode *ip; /* inode of guy being linked to */ | |
383 | vnode_t *tdvp; /* target directory for new name/link */ | |
384 | vnode_t *vp; /* vp of name being linked */ | |
385 | int error; | |
386 | ||
387 | ip = old_dentry->d_inode; /* inode being linked to */ | |
388 | if (S_ISDIR(ip->i_mode)) | |
389 | return -EPERM; | |
390 | ||
391 | tdvp = LINVFS_GET_VP(dir); | |
392 | vp = LINVFS_GET_VP(ip); | |
393 | ||
394 | VOP_LINK(tdvp, vp, dentry, NULL, error); | |
395 | if (!error) { | |
396 | VMODIFY(tdvp); | |
397 | VN_HOLD(vp); | |
398 | validate_fields(ip); | |
399 | d_instantiate(dentry, ip); | |
400 | } | |
401 | return -error; | |
402 | } | |
403 | ||
404 | STATIC int | |
405 | linvfs_unlink( | |
406 | struct inode *dir, | |
407 | struct dentry *dentry) | |
408 | { | |
409 | struct inode *inode; | |
410 | vnode_t *dvp; /* directory containing name to remove */ | |
411 | int error; | |
412 | ||
413 | inode = dentry->d_inode; | |
414 | dvp = LINVFS_GET_VP(dir); | |
415 | ||
416 | VOP_REMOVE(dvp, dentry, NULL, error); | |
417 | if (!error) { | |
418 | validate_fields(dir); /* For size only */ | |
419 | validate_fields(inode); | |
420 | } | |
421 | ||
422 | return -error; | |
423 | } | |
424 | ||
425 | STATIC int | |
426 | linvfs_symlink( | |
427 | struct inode *dir, | |
428 | struct dentry *dentry, | |
429 | const char *symname) | |
430 | { | |
431 | struct inode *ip; | |
432 | vattr_t va; | |
433 | vnode_t *dvp; /* directory containing name of symlink */ | |
434 | vnode_t *cvp; /* used to lookup symlink to put in dentry */ | |
435 | int error; | |
436 | ||
437 | dvp = LINVFS_GET_VP(dir); | |
438 | cvp = NULL; | |
439 | ||
440 | memset(&va, 0, sizeof(va)); | |
0432dab2 CH |
441 | va.va_mode = S_IFLNK | |
442 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); | |
1da177e4 LT |
443 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
444 | ||
445 | error = 0; | |
446 | VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error); | |
447 | if (!error && cvp) { | |
1da177e4 LT |
448 | ip = LINVFS_GET_IP(cvp); |
449 | d_instantiate(dentry, ip); | |
450 | validate_fields(dir); | |
451 | validate_fields(ip); /* size needs update */ | |
452 | } | |
453 | return -error; | |
454 | } | |
455 | ||
456 | STATIC int | |
457 | linvfs_rmdir( | |
458 | struct inode *dir, | |
459 | struct dentry *dentry) | |
460 | { | |
461 | struct inode *inode = dentry->d_inode; | |
462 | vnode_t *dvp = LINVFS_GET_VP(dir); | |
463 | int error; | |
464 | ||
465 | VOP_RMDIR(dvp, dentry, NULL, error); | |
466 | if (!error) { | |
467 | validate_fields(inode); | |
468 | validate_fields(dir); | |
469 | } | |
470 | return -error; | |
471 | } | |
472 | ||
473 | STATIC int | |
474 | linvfs_rename( | |
475 | struct inode *odir, | |
476 | struct dentry *odentry, | |
477 | struct inode *ndir, | |
478 | struct dentry *ndentry) | |
479 | { | |
480 | struct inode *new_inode = ndentry->d_inode; | |
481 | vnode_t *fvp; /* from directory */ | |
482 | vnode_t *tvp; /* target directory */ | |
483 | int error; | |
484 | ||
485 | fvp = LINVFS_GET_VP(odir); | |
486 | tvp = LINVFS_GET_VP(ndir); | |
487 | ||
488 | VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error); | |
489 | if (error) | |
490 | return -error; | |
491 | ||
492 | if (new_inode) | |
493 | validate_fields(new_inode); | |
494 | ||
495 | validate_fields(odir); | |
496 | if (ndir != odir) | |
497 | validate_fields(ndir); | |
498 | return 0; | |
499 | } | |
500 | ||
501 | /* | |
502 | * careful here - this function can get called recursively, so | |
503 | * we need to be very careful about how much stack we use. | |
504 | * uio is kmalloced for this reason... | |
505 | */ | |
008b150a | 506 | STATIC void * |
1da177e4 LT |
507 | linvfs_follow_link( |
508 | struct dentry *dentry, | |
509 | struct nameidata *nd) | |
510 | { | |
511 | vnode_t *vp; | |
512 | uio_t *uio; | |
513 | iovec_t iov; | |
514 | int error; | |
515 | char *link; | |
516 | ||
517 | ASSERT(dentry); | |
518 | ASSERT(nd); | |
519 | ||
520 | link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL); | |
521 | if (!link) { | |
522 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 523 | return NULL; |
1da177e4 LT |
524 | } |
525 | ||
526 | uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL); | |
527 | if (!uio) { | |
528 | kfree(link); | |
529 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 530 | return NULL; |
1da177e4 LT |
531 | } |
532 | ||
533 | vp = LINVFS_GET_VP(dentry->d_inode); | |
534 | ||
535 | iov.iov_base = link; | |
536 | iov.iov_len = MAXNAMELEN; | |
537 | ||
538 | uio->uio_iov = &iov; | |
539 | uio->uio_offset = 0; | |
540 | uio->uio_segflg = UIO_SYSSPACE; | |
541 | uio->uio_resid = MAXNAMELEN; | |
542 | uio->uio_iovcnt = 1; | |
543 | ||
544 | VOP_READLINK(vp, uio, 0, NULL, error); | |
545 | if (error) { | |
546 | kfree(link); | |
547 | link = ERR_PTR(-error); | |
548 | } else { | |
549 | link[MAXNAMELEN - uio->uio_resid] = '\0'; | |
550 | } | |
551 | kfree(uio); | |
552 | ||
553 | nd_set_link(nd, link); | |
008b150a | 554 | return NULL; |
1da177e4 LT |
555 | } |
556 | ||
cde410a9 NS |
557 | STATIC void |
558 | linvfs_put_link( | |
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 | |
570 | STATIC int | |
571 | linvfs_permission( | |
572 | struct inode *inode, | |
573 | int mode, | |
574 | struct nameidata *nd) | |
575 | { | |
576 | vnode_t *vp = LINVFS_GET_VP(inode); | |
577 | int error; | |
578 | ||
579 | mode <<= 6; /* convert from linux to vnode access bits */ | |
580 | VOP_ACCESS(vp, mode, NULL, error); | |
581 | return -error; | |
582 | } | |
583 | #else | |
584 | #define linvfs_permission NULL | |
585 | #endif | |
586 | ||
587 | STATIC int | |
588 | linvfs_getattr( | |
589 | struct vfsmount *mnt, | |
590 | struct dentry *dentry, | |
591 | struct kstat *stat) | |
592 | { | |
593 | struct inode *inode = dentry->d_inode; | |
594 | vnode_t *vp = LINVFS_GET_VP(inode); | |
595 | int error = 0; | |
596 | ||
597 | if (unlikely(vp->v_flag & VMODIFIED)) | |
598 | error = vn_revalidate(vp); | |
599 | if (!error) | |
600 | generic_fillattr(inode, stat); | |
601 | return 0; | |
602 | } | |
603 | ||
604 | STATIC int | |
605 | linvfs_setattr( | |
606 | struct dentry *dentry, | |
607 | struct iattr *attr) | |
608 | { | |
609 | struct inode *inode = dentry->d_inode; | |
610 | unsigned int ia_valid = attr->ia_valid; | |
611 | vnode_t *vp = LINVFS_GET_VP(inode); | |
612 | vattr_t vattr; | |
613 | int flags = 0; | |
614 | int error; | |
615 | ||
616 | memset(&vattr, 0, sizeof(vattr_t)); | |
617 | if (ia_valid & ATTR_UID) { | |
618 | vattr.va_mask |= XFS_AT_UID; | |
619 | vattr.va_uid = attr->ia_uid; | |
620 | } | |
621 | if (ia_valid & ATTR_GID) { | |
622 | vattr.va_mask |= XFS_AT_GID; | |
623 | vattr.va_gid = attr->ia_gid; | |
624 | } | |
625 | if (ia_valid & ATTR_SIZE) { | |
626 | vattr.va_mask |= XFS_AT_SIZE; | |
627 | vattr.va_size = attr->ia_size; | |
628 | } | |
629 | if (ia_valid & ATTR_ATIME) { | |
630 | vattr.va_mask |= XFS_AT_ATIME; | |
631 | vattr.va_atime = attr->ia_atime; | |
632 | } | |
633 | if (ia_valid & ATTR_MTIME) { | |
634 | vattr.va_mask |= XFS_AT_MTIME; | |
635 | vattr.va_mtime = attr->ia_mtime; | |
636 | } | |
637 | if (ia_valid & ATTR_CTIME) { | |
638 | vattr.va_mask |= XFS_AT_CTIME; | |
639 | vattr.va_ctime = attr->ia_ctime; | |
640 | } | |
641 | if (ia_valid & ATTR_MODE) { | |
642 | vattr.va_mask |= XFS_AT_MODE; | |
643 | vattr.va_mode = attr->ia_mode; | |
644 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
645 | inode->i_mode &= ~S_ISGID; | |
646 | } | |
647 | ||
648 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
649 | flags |= ATTR_UTIME; | |
650 | #ifdef ATTR_NO_BLOCK | |
651 | if ((ia_valid & ATTR_NO_BLOCK)) | |
652 | flags |= ATTR_NONBLOCK; | |
653 | #endif | |
654 | ||
655 | VOP_SETATTR(vp, &vattr, flags, NULL, error); | |
656 | if (error) | |
657 | return -error; | |
658 | vn_revalidate(vp); | |
659 | return error; | |
660 | } | |
661 | ||
662 | STATIC void | |
663 | linvfs_truncate( | |
664 | struct inode *inode) | |
665 | { | |
666 | block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block); | |
667 | } | |
668 | ||
669 | STATIC int | |
670 | linvfs_setxattr( | |
671 | struct dentry *dentry, | |
672 | const char *name, | |
673 | const void *data, | |
674 | size_t size, | |
675 | int flags) | |
676 | { | |
677 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
678 | char *attr = (char *)name; | |
679 | attrnames_t *namesp; | |
680 | int xflags = 0; | |
681 | int error; | |
682 | ||
683 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
684 | if (!namesp) | |
685 | return -EOPNOTSUPP; | |
686 | attr += namesp->attr_namelen; | |
687 | error = namesp->attr_capable(vp, NULL); | |
688 | if (error) | |
689 | return error; | |
690 | ||
691 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
692 | if (flags & XATTR_CREATE) | |
693 | xflags |= ATTR_CREATE; | |
694 | if (flags & XATTR_REPLACE) | |
695 | xflags |= ATTR_REPLACE; | |
696 | xflags |= namesp->attr_flag; | |
697 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
698 | } | |
699 | ||
700 | STATIC ssize_t | |
701 | linvfs_getxattr( | |
702 | struct dentry *dentry, | |
703 | const char *name, | |
704 | void *data, | |
705 | size_t size) | |
706 | { | |
707 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
708 | char *attr = (char *)name; | |
709 | attrnames_t *namesp; | |
710 | int xflags = 0; | |
711 | ssize_t error; | |
712 | ||
713 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
714 | if (!namesp) | |
715 | return -EOPNOTSUPP; | |
716 | attr += namesp->attr_namelen; | |
717 | error = namesp->attr_capable(vp, NULL); | |
718 | if (error) | |
719 | return error; | |
720 | ||
721 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
722 | if (!size) { | |
723 | xflags |= ATTR_KERNOVAL; | |
724 | data = NULL; | |
725 | } | |
726 | xflags |= namesp->attr_flag; | |
727 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
728 | } | |
729 | ||
730 | STATIC ssize_t | |
731 | linvfs_listxattr( | |
732 | struct dentry *dentry, | |
733 | char *data, | |
734 | size_t size) | |
735 | { | |
736 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
737 | int error, xflags = ATTR_KERNAMELS; | |
738 | ssize_t result; | |
739 | ||
740 | if (!size) | |
741 | xflags |= ATTR_KERNOVAL; | |
742 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
743 | ||
744 | error = attr_generic_list(vp, data, size, xflags, &result); | |
745 | if (error < 0) | |
746 | return error; | |
747 | return result; | |
748 | } | |
749 | ||
750 | STATIC int | |
751 | linvfs_removexattr( | |
752 | struct dentry *dentry, | |
753 | const char *name) | |
754 | { | |
755 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
756 | char *attr = (char *)name; | |
757 | attrnames_t *namesp; | |
758 | int xflags = 0; | |
759 | int error; | |
760 | ||
761 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
762 | if (!namesp) | |
763 | return -EOPNOTSUPP; | |
764 | attr += namesp->attr_namelen; | |
765 | error = namesp->attr_capable(vp, NULL); | |
766 | if (error) | |
767 | return error; | |
768 | xflags |= namesp->attr_flag; | |
769 | return namesp->attr_remove(vp, attr, xflags); | |
770 | } | |
771 | ||
772 | ||
773 | struct inode_operations linvfs_file_inode_operations = { | |
774 | .permission = linvfs_permission, | |
775 | .truncate = linvfs_truncate, | |
776 | .getattr = linvfs_getattr, | |
777 | .setattr = linvfs_setattr, | |
778 | .setxattr = linvfs_setxattr, | |
779 | .getxattr = linvfs_getxattr, | |
780 | .listxattr = linvfs_listxattr, | |
781 | .removexattr = linvfs_removexattr, | |
782 | }; | |
783 | ||
784 | struct inode_operations linvfs_dir_inode_operations = { | |
785 | .create = linvfs_create, | |
786 | .lookup = linvfs_lookup, | |
787 | .link = linvfs_link, | |
788 | .unlink = linvfs_unlink, | |
789 | .symlink = linvfs_symlink, | |
790 | .mkdir = linvfs_mkdir, | |
791 | .rmdir = linvfs_rmdir, | |
792 | .mknod = linvfs_mknod, | |
793 | .rename = linvfs_rename, | |
794 | .permission = linvfs_permission, | |
795 | .getattr = linvfs_getattr, | |
796 | .setattr = linvfs_setattr, | |
797 | .setxattr = linvfs_setxattr, | |
798 | .getxattr = linvfs_getxattr, | |
799 | .listxattr = linvfs_listxattr, | |
800 | .removexattr = linvfs_removexattr, | |
801 | }; | |
802 | ||
803 | struct inode_operations linvfs_symlink_inode_operations = { | |
804 | .readlink = generic_readlink, | |
805 | .follow_link = linvfs_follow_link, | |
806 | .put_link = linvfs_put_link, | |
807 | .permission = linvfs_permission, | |
808 | .getattr = linvfs_getattr, | |
809 | .setattr = linvfs_setattr, | |
810 | .setxattr = linvfs_setxattr, | |
811 | .getxattr = linvfs_getxattr, | |
812 | .listxattr = linvfs_listxattr, | |
813 | .removexattr = linvfs_removexattr, | |
814 | }; |