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