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> | |
446ada4a | 57 | #include <linux/security.h> |
1da177e4 | 58 | |
75e17b3c CH |
59 | /* |
60 | * Get a XFS inode from a given vnode. | |
61 | */ | |
62 | xfs_inode_t * | |
63 | xfs_vtoi( | |
64 | struct vnode *vp) | |
65 | { | |
66 | bhv_desc_t *bdp; | |
67 | ||
68 | bdp = bhv_lookup_range(VN_BHV_HEAD(vp), | |
69 | VNODE_POSITION_XFS, VNODE_POSITION_XFS); | |
70 | if (unlikely(bdp == NULL)) | |
71 | return NULL; | |
72 | return XFS_BHVTOI(bdp); | |
73 | } | |
74 | ||
42fe2b1f CH |
75 | /* |
76 | * Bring the atime in the XFS inode uptodate. | |
77 | * Used before logging the inode to disk or when the Linux inode goes away. | |
78 | */ | |
79 | void | |
80 | xfs_synchronize_atime( | |
81 | xfs_inode_t *ip) | |
82 | { | |
83 | vnode_t *vp; | |
84 | ||
85 | vp = XFS_ITOV_NULL(ip); | |
86 | if (vp) { | |
87 | struct inode *inode = &vp->v_inode; | |
88 | ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; | |
89 | ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; | |
90 | } | |
91 | } | |
92 | ||
4aeb664c NS |
93 | /* |
94 | * Change the requested timestamp in the given inode. | |
95 | * We don't lock across timestamp updates, and we don't log them but | |
96 | * we do record the fact that there is dirty information in core. | |
97 | * | |
98 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
99 | * with XFS_ICHGTIME_ACC to be sure that access time | |
100 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
101 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
102 | * timestamp if the filesystem is mounted noacctm. | |
103 | */ | |
104 | void | |
105 | xfs_ichgtime( | |
106 | xfs_inode_t *ip, | |
107 | int flags) | |
108 | { | |
109 | struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); | |
110 | timespec_t tv; | |
111 | ||
4aeb664c NS |
112 | nanotime(&tv); |
113 | if (flags & XFS_ICHGTIME_MOD) { | |
114 | inode->i_mtime = tv; | |
115 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
116 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
117 | } | |
118 | if (flags & XFS_ICHGTIME_ACC) { | |
119 | inode->i_atime = tv; | |
120 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
121 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
122 | } | |
123 | if (flags & XFS_ICHGTIME_CHG) { | |
124 | inode->i_ctime = tv; | |
125 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
126 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
127 | } | |
128 | ||
129 | /* | |
130 | * We update the i_update_core field _after_ changing | |
131 | * the timestamps in order to coordinate properly with | |
132 | * xfs_iflush() so that we don't lose timestamp updates. | |
133 | * This keeps us from having to hold the inode lock | |
134 | * while doing this. We use the SYNCHRONIZE macro to | |
135 | * ensure that the compiler does not reorder the update | |
136 | * of i_update_core above the timestamp updates above. | |
137 | */ | |
138 | SYNCHRONIZE(); | |
139 | ip->i_update_core = 1; | |
140 | if (!(inode->i_state & I_LOCK)) | |
141 | mark_inode_dirty_sync(inode); | |
142 | } | |
143 | ||
144 | /* | |
145 | * Variant on the above which avoids querying the system clock | |
146 | * in situations where we know the Linux inode timestamps have | |
147 | * just been updated (and so we can update our inode cheaply). | |
4aeb664c NS |
148 | */ |
149 | void | |
150 | xfs_ichgtime_fast( | |
151 | xfs_inode_t *ip, | |
152 | struct inode *inode, | |
153 | int flags) | |
154 | { | |
155 | timespec_t *tvp; | |
156 | ||
157 | /* | |
42fe2b1f CH |
158 | * Atime updates for read() & friends are handled lazily now, and |
159 | * explicit updates must go through xfs_ichgtime() | |
4aeb664c | 160 | */ |
42fe2b1f | 161 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
4aeb664c NS |
162 | |
163 | /* | |
42fe2b1f CH |
164 | * We're not supposed to change timestamps in readonly-mounted |
165 | * filesystems. Throw it away if anyone asks us. | |
4aeb664c | 166 | */ |
42fe2b1f | 167 | if (unlikely(IS_RDONLY(inode))) |
4aeb664c NS |
168 | return; |
169 | ||
170 | if (flags & XFS_ICHGTIME_MOD) { | |
171 | tvp = &inode->i_mtime; | |
172 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
173 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
174 | } | |
4aeb664c NS |
175 | if (flags & XFS_ICHGTIME_CHG) { |
176 | tvp = &inode->i_ctime; | |
177 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
178 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
179 | } | |
180 | ||
181 | /* | |
182 | * We update the i_update_core field _after_ changing | |
183 | * the timestamps in order to coordinate properly with | |
184 | * xfs_iflush() so that we don't lose timestamp updates. | |
185 | * This keeps us from having to hold the inode lock | |
186 | * while doing this. We use the SYNCHRONIZE macro to | |
187 | * ensure that the compiler does not reorder the update | |
188 | * of i_update_core above the timestamp updates above. | |
189 | */ | |
190 | SYNCHRONIZE(); | |
191 | ip->i_update_core = 1; | |
192 | if (!(inode->i_state & I_LOCK)) | |
193 | mark_inode_dirty_sync(inode); | |
194 | } | |
195 | ||
1da177e4 LT |
196 | |
197 | /* | |
198 | * Pull the link count and size up from the xfs inode to the linux inode | |
199 | */ | |
200 | STATIC void | |
416c6d5b | 201 | xfs_validate_fields( |
220b5284 NS |
202 | struct inode *ip, |
203 | struct vattr *vattr) | |
1da177e4 LT |
204 | { |
205 | vnode_t *vp = LINVFS_GET_VP(ip); | |
1da177e4 LT |
206 | int error; |
207 | ||
220b5284 NS |
208 | vattr->va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; |
209 | VOP_GETATTR(vp, vattr, ATTR_LAZY, NULL, error); | |
210 | if (likely(!error)) { | |
211 | ip->i_nlink = vattr->va_nlink; | |
212 | ip->i_blocks = vattr->va_nblocks; | |
1da177e4 | 213 | |
220b5284 NS |
214 | /* we're under i_sem so i_size can't change under us */ |
215 | if (i_size_read(ip) != vattr->va_size) | |
216 | i_size_write(ip, vattr->va_size); | |
1da177e4 LT |
217 | } |
218 | } | |
219 | ||
446ada4a NS |
220 | /* |
221 | * Hook in SELinux. This is not quite correct yet, what we really need | |
222 | * here (as we do for default ACLs) is a mechanism by which creation of | |
223 | * these attrs can be journalled at inode creation time (along with the | |
224 | * inode, of course, such that log replay can't cause these to be lost). | |
225 | */ | |
226 | STATIC int | |
416c6d5b | 227 | xfs_init_security( |
446ada4a NS |
228 | struct vnode *vp, |
229 | struct inode *dir) | |
230 | { | |
231 | struct inode *ip = LINVFS_GET_IP(vp); | |
232 | size_t length; | |
233 | void *value; | |
234 | char *name; | |
235 | int error; | |
236 | ||
237 | error = security_inode_init_security(ip, dir, &name, &value, &length); | |
238 | if (error) { | |
239 | if (error == -EOPNOTSUPP) | |
240 | return 0; | |
241 | return -error; | |
242 | } | |
243 | ||
244 | VOP_ATTR_SET(vp, name, value, length, ATTR_SECURE, NULL, error); | |
245 | if (!error) | |
246 | VMODIFY(vp); | |
247 | ||
248 | kfree(name); | |
249 | kfree(value); | |
250 | return error; | |
251 | } | |
252 | ||
1da177e4 LT |
253 | /* |
254 | * Determine whether a process has a valid fs_struct (kernel daemons | |
255 | * like knfsd don't have an fs_struct). | |
256 | * | |
257 | * XXX(hch): nfsd is broken, better fix it instead. | |
258 | */ | |
259 | STATIC inline int | |
416c6d5b | 260 | xfs_has_fs_struct(struct task_struct *task) |
1da177e4 LT |
261 | { |
262 | return (task->fs != init_task.fs); | |
263 | } | |
264 | ||
3a69c7dc | 265 | STATIC inline void |
416c6d5b | 266 | xfs_cleanup_inode( |
3a69c7dc YL |
267 | vnode_t *dvp, |
268 | vnode_t *vp, | |
220b5284 | 269 | struct dentry *dentry, |
3a69c7dc YL |
270 | int mode) |
271 | { | |
272 | struct dentry teardown = {}; | |
220b5284 | 273 | int error; |
3a69c7dc YL |
274 | |
275 | /* Oh, the horror. | |
220b5284 | 276 | * If we can't add the ACL or we fail in |
416c6d5b | 277 | * xfs_init_security we must back out. |
3a69c7dc YL |
278 | * ENOSPC can hit here, among other things. |
279 | */ | |
280 | teardown.d_inode = LINVFS_GET_IP(vp); | |
281 | teardown.d_name = dentry->d_name; | |
282 | ||
283 | if (S_ISDIR(mode)) | |
220b5284 | 284 | VOP_RMDIR(dvp, &teardown, NULL, error); |
3a69c7dc | 285 | else |
220b5284 | 286 | VOP_REMOVE(dvp, &teardown, NULL, error); |
3a69c7dc YL |
287 | VN_RELE(vp); |
288 | } | |
289 | ||
1da177e4 | 290 | STATIC int |
416c6d5b | 291 | xfs_vn_mknod( |
1da177e4 LT |
292 | struct inode *dir, |
293 | struct dentry *dentry, | |
294 | int mode, | |
295 | dev_t rdev) | |
296 | { | |
297 | struct inode *ip; | |
220b5284 | 298 | vattr_t *vattr; |
1da177e4 LT |
299 | vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir); |
300 | xfs_acl_t *default_acl = NULL; | |
301 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
302 | int error; | |
303 | ||
304 | /* | |
305 | * Irix uses Missed'em'V split, but doesn't want to see | |
306 | * the upper 5 bits of (14bit) major. | |
307 | */ | |
220b5284 | 308 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
1da177e4 LT |
309 | return -EINVAL; |
310 | ||
220b5284 NS |
311 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
312 | if (unlikely(!vattr)) | |
313 | return -ENOMEM; | |
314 | ||
315 | if (unlikely(test_default_acl && test_default_acl(dvp))) { | |
316 | if (!_ACL_ALLOC(default_acl)) { | |
317 | kfree(vattr); | |
1da177e4 | 318 | return -ENOMEM; |
220b5284 | 319 | } |
1da177e4 LT |
320 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { |
321 | _ACL_FREE(default_acl); | |
322 | default_acl = NULL; | |
323 | } | |
324 | } | |
325 | ||
416c6d5b | 326 | if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current)) |
1da177e4 LT |
327 | mode &= ~current->fs->umask; |
328 | ||
220b5284 NS |
329 | memset(vattr, 0, sizeof(*vattr)); |
330 | vattr->va_mask = XFS_AT_TYPE|XFS_AT_MODE; | |
331 | vattr->va_mode = mode; | |
1da177e4 LT |
332 | |
333 | switch (mode & S_IFMT) { | |
334 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
220b5284 NS |
335 | vattr->va_rdev = sysv_encode_dev(rdev); |
336 | vattr->va_mask |= XFS_AT_RDEV; | |
1da177e4 LT |
337 | /*FALLTHROUGH*/ |
338 | case S_IFREG: | |
220b5284 | 339 | VOP_CREATE(dvp, dentry, vattr, &vp, NULL, error); |
1da177e4 LT |
340 | break; |
341 | case S_IFDIR: | |
220b5284 | 342 | VOP_MKDIR(dvp, dentry, vattr, &vp, NULL, error); |
1da177e4 LT |
343 | break; |
344 | default: | |
345 | error = EINVAL; | |
346 | break; | |
347 | } | |
348 | ||
220b5284 | 349 | if (unlikely(!error)) { |
416c6d5b | 350 | error = xfs_init_security(vp, dir); |
3a69c7dc | 351 | if (error) |
416c6d5b | 352 | xfs_cleanup_inode(dvp, vp, dentry, mode); |
3a69c7dc | 353 | } |
446ada4a | 354 | |
220b5284 | 355 | if (unlikely(default_acl)) { |
1da177e4 | 356 | if (!error) { |
220b5284 NS |
357 | error = _ACL_INHERIT(vp, vattr, default_acl); |
358 | if (!error) | |
1da177e4 | 359 | VMODIFY(vp); |
3a69c7dc | 360 | else |
416c6d5b | 361 | xfs_cleanup_inode(dvp, vp, dentry, mode); |
1da177e4 LT |
362 | } |
363 | _ACL_FREE(default_acl); | |
364 | } | |
365 | ||
220b5284 | 366 | if (likely(!error)) { |
1da177e4 LT |
367 | ASSERT(vp); |
368 | ip = LINVFS_GET_IP(vp); | |
369 | ||
370 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
371 | ip->i_rdev = rdev; | |
372 | else if (S_ISDIR(mode)) | |
416c6d5b | 373 | xfs_validate_fields(ip, vattr); |
1da177e4 | 374 | d_instantiate(dentry, ip); |
416c6d5b | 375 | xfs_validate_fields(dir, vattr); |
1da177e4 | 376 | } |
220b5284 | 377 | kfree(vattr); |
1da177e4 LT |
378 | return -error; |
379 | } | |
380 | ||
381 | STATIC int | |
416c6d5b | 382 | xfs_vn_create( |
1da177e4 LT |
383 | struct inode *dir, |
384 | struct dentry *dentry, | |
385 | int mode, | |
386 | struct nameidata *nd) | |
387 | { | |
416c6d5b | 388 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
389 | } |
390 | ||
391 | STATIC int | |
416c6d5b | 392 | xfs_vn_mkdir( |
1da177e4 LT |
393 | struct inode *dir, |
394 | struct dentry *dentry, | |
395 | int mode) | |
396 | { | |
416c6d5b | 397 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
398 | } |
399 | ||
400 | STATIC struct dentry * | |
416c6d5b | 401 | xfs_vn_lookup( |
1da177e4 LT |
402 | struct inode *dir, |
403 | struct dentry *dentry, | |
404 | struct nameidata *nd) | |
405 | { | |
406 | struct vnode *vp = LINVFS_GET_VP(dir), *cvp; | |
407 | int error; | |
408 | ||
409 | if (dentry->d_name.len >= MAXNAMELEN) | |
410 | return ERR_PTR(-ENAMETOOLONG); | |
411 | ||
412 | VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error); | |
413 | if (error) { | |
414 | if (unlikely(error != ENOENT)) | |
415 | return ERR_PTR(-error); | |
416 | d_add(dentry, NULL); | |
417 | return NULL; | |
418 | } | |
419 | ||
420 | return d_splice_alias(LINVFS_GET_IP(cvp), dentry); | |
421 | } | |
422 | ||
423 | STATIC int | |
416c6d5b | 424 | xfs_vn_link( |
1da177e4 LT |
425 | struct dentry *old_dentry, |
426 | struct inode *dir, | |
427 | struct dentry *dentry) | |
428 | { | |
429 | struct inode *ip; /* inode of guy being linked to */ | |
430 | vnode_t *tdvp; /* target directory for new name/link */ | |
431 | vnode_t *vp; /* vp of name being linked */ | |
220b5284 | 432 | vattr_t *vattr; |
1da177e4 LT |
433 | int error; |
434 | ||
435 | ip = old_dentry->d_inode; /* inode being linked to */ | |
436 | if (S_ISDIR(ip->i_mode)) | |
437 | return -EPERM; | |
438 | ||
220b5284 NS |
439 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
440 | if (unlikely(!vattr)) | |
441 | return -ENOMEM; | |
442 | ||
1da177e4 LT |
443 | tdvp = LINVFS_GET_VP(dir); |
444 | vp = LINVFS_GET_VP(ip); | |
445 | ||
446 | VOP_LINK(tdvp, vp, dentry, NULL, error); | |
220b5284 | 447 | if (likely(!error)) { |
1da177e4 LT |
448 | VMODIFY(tdvp); |
449 | VN_HOLD(vp); | |
416c6d5b | 450 | xfs_validate_fields(ip, vattr); |
1da177e4 LT |
451 | d_instantiate(dentry, ip); |
452 | } | |
220b5284 | 453 | kfree(vattr); |
1da177e4 LT |
454 | return -error; |
455 | } | |
456 | ||
457 | STATIC int | |
416c6d5b | 458 | xfs_vn_unlink( |
1da177e4 LT |
459 | struct inode *dir, |
460 | struct dentry *dentry) | |
461 | { | |
462 | struct inode *inode; | |
463 | vnode_t *dvp; /* directory containing name to remove */ | |
220b5284 | 464 | vattr_t *vattr; |
1da177e4 LT |
465 | int error; |
466 | ||
220b5284 NS |
467 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
468 | if (unlikely(!vattr)) | |
469 | return -ENOMEM; | |
470 | ||
1da177e4 LT |
471 | inode = dentry->d_inode; |
472 | dvp = LINVFS_GET_VP(dir); | |
473 | ||
474 | VOP_REMOVE(dvp, dentry, NULL, error); | |
220b5284 | 475 | if (likely(!error)) { |
416c6d5b NS |
476 | xfs_validate_fields(dir, vattr); /* size needs update */ |
477 | xfs_validate_fields(inode, vattr); | |
1da177e4 | 478 | } |
220b5284 | 479 | kfree(vattr); |
1da177e4 LT |
480 | return -error; |
481 | } | |
482 | ||
483 | STATIC int | |
416c6d5b | 484 | xfs_vn_symlink( |
1da177e4 LT |
485 | struct inode *dir, |
486 | struct dentry *dentry, | |
487 | const char *symname) | |
488 | { | |
489 | struct inode *ip; | |
220b5284 | 490 | vattr_t *vattr; |
1da177e4 LT |
491 | vnode_t *dvp; /* directory containing name of symlink */ |
492 | vnode_t *cvp; /* used to lookup symlink to put in dentry */ | |
493 | int error; | |
494 | ||
495 | dvp = LINVFS_GET_VP(dir); | |
496 | cvp = NULL; | |
497 | ||
220b5284 NS |
498 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
499 | if (unlikely(!vattr)) | |
500 | return -ENOMEM; | |
501 | ||
502 | memset(vattr, 0, sizeof(*vattr)); | |
503 | vattr->va_mode = S_IFLNK | | |
0432dab2 | 504 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
220b5284 | 505 | vattr->va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
1da177e4 LT |
506 | |
507 | error = 0; | |
220b5284 | 508 | VOP_SYMLINK(dvp, dentry, vattr, (char *)symname, &cvp, NULL, error); |
54245702 | 509 | if (likely(!error && cvp)) { |
416c6d5b | 510 | error = xfs_init_security(cvp, dir); |
54245702 NS |
511 | if (likely(!error)) { |
512 | ip = LINVFS_GET_IP(cvp); | |
513 | d_instantiate(dentry, ip); | |
416c6d5b NS |
514 | xfs_validate_fields(dir, vattr); |
515 | xfs_validate_fields(ip, vattr); | |
54245702 | 516 | } |
1da177e4 | 517 | } |
220b5284 | 518 | kfree(vattr); |
1da177e4 LT |
519 | return -error; |
520 | } | |
521 | ||
522 | STATIC int | |
416c6d5b | 523 | xfs_vn_rmdir( |
1da177e4 LT |
524 | struct inode *dir, |
525 | struct dentry *dentry) | |
526 | { | |
527 | struct inode *inode = dentry->d_inode; | |
528 | vnode_t *dvp = LINVFS_GET_VP(dir); | |
220b5284 | 529 | vattr_t *vattr; |
1da177e4 LT |
530 | int error; |
531 | ||
220b5284 NS |
532 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
533 | if (unlikely(!vattr)) | |
534 | return -ENOMEM; | |
535 | ||
1da177e4 | 536 | VOP_RMDIR(dvp, dentry, NULL, error); |
220b5284 | 537 | if (likely(!error)) { |
416c6d5b NS |
538 | xfs_validate_fields(inode, vattr); |
539 | xfs_validate_fields(dir, vattr); | |
1da177e4 | 540 | } |
220b5284 | 541 | kfree(vattr); |
1da177e4 LT |
542 | return -error; |
543 | } | |
544 | ||
545 | STATIC int | |
416c6d5b | 546 | xfs_vn_rename( |
1da177e4 LT |
547 | struct inode *odir, |
548 | struct dentry *odentry, | |
549 | struct inode *ndir, | |
550 | struct dentry *ndentry) | |
551 | { | |
552 | struct inode *new_inode = ndentry->d_inode; | |
553 | vnode_t *fvp; /* from directory */ | |
554 | vnode_t *tvp; /* target directory */ | |
220b5284 | 555 | vattr_t *vattr; |
1da177e4 LT |
556 | int error; |
557 | ||
220b5284 NS |
558 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
559 | if (unlikely(!vattr)) | |
560 | return -ENOMEM; | |
561 | ||
1da177e4 LT |
562 | fvp = LINVFS_GET_VP(odir); |
563 | tvp = LINVFS_GET_VP(ndir); | |
564 | ||
565 | VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error); | |
220b5284 NS |
566 | if (likely(!error)) { |
567 | if (new_inode) | |
416c6d5b NS |
568 | xfs_validate_fields(new_inode, vattr); |
569 | xfs_validate_fields(odir, vattr); | |
220b5284 | 570 | if (ndir != odir) |
416c6d5b | 571 | xfs_validate_fields(ndir, vattr); |
220b5284 NS |
572 | } |
573 | kfree(vattr); | |
574 | return -error; | |
1da177e4 LT |
575 | } |
576 | ||
577 | /* | |
578 | * careful here - this function can get called recursively, so | |
579 | * we need to be very careful about how much stack we use. | |
580 | * uio is kmalloced for this reason... | |
581 | */ | |
008b150a | 582 | STATIC void * |
416c6d5b | 583 | xfs_vn_follow_link( |
1da177e4 LT |
584 | struct dentry *dentry, |
585 | struct nameidata *nd) | |
586 | { | |
587 | vnode_t *vp; | |
588 | uio_t *uio; | |
589 | iovec_t iov; | |
590 | int error; | |
591 | char *link; | |
592 | ||
593 | ASSERT(dentry); | |
594 | ASSERT(nd); | |
595 | ||
0d1335b3 | 596 | link = (char *)kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
1da177e4 LT |
597 | if (!link) { |
598 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 599 | return NULL; |
1da177e4 LT |
600 | } |
601 | ||
602 | uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL); | |
603 | if (!uio) { | |
604 | kfree(link); | |
605 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 606 | return NULL; |
1da177e4 LT |
607 | } |
608 | ||
609 | vp = LINVFS_GET_VP(dentry->d_inode); | |
610 | ||
611 | iov.iov_base = link; | |
0d1335b3 | 612 | iov.iov_len = MAXPATHLEN; |
1da177e4 LT |
613 | |
614 | uio->uio_iov = &iov; | |
615 | uio->uio_offset = 0; | |
616 | uio->uio_segflg = UIO_SYSSPACE; | |
0d1335b3 | 617 | uio->uio_resid = MAXPATHLEN; |
1da177e4 LT |
618 | uio->uio_iovcnt = 1; |
619 | ||
620 | VOP_READLINK(vp, uio, 0, NULL, error); | |
621 | if (error) { | |
622 | kfree(link); | |
623 | link = ERR_PTR(-error); | |
624 | } else { | |
0d1335b3 | 625 | link[MAXPATHLEN - uio->uio_resid] = '\0'; |
1da177e4 LT |
626 | } |
627 | kfree(uio); | |
628 | ||
629 | nd_set_link(nd, link); | |
008b150a | 630 | return NULL; |
1da177e4 LT |
631 | } |
632 | ||
cde410a9 | 633 | STATIC void |
416c6d5b | 634 | xfs_vn_put_link( |
cde410a9 NS |
635 | struct dentry *dentry, |
636 | struct nameidata *nd, | |
637 | void *p) | |
1da177e4 | 638 | { |
cde410a9 NS |
639 | char *s = nd_get_link(nd); |
640 | ||
1da177e4 LT |
641 | if (!IS_ERR(s)) |
642 | kfree(s); | |
643 | } | |
644 | ||
645 | #ifdef CONFIG_XFS_POSIX_ACL | |
646 | STATIC int | |
416c6d5b | 647 | xfs_vn_permission( |
1da177e4 LT |
648 | struct inode *inode, |
649 | int mode, | |
650 | struct nameidata *nd) | |
651 | { | |
652 | vnode_t *vp = LINVFS_GET_VP(inode); | |
653 | int error; | |
654 | ||
655 | mode <<= 6; /* convert from linux to vnode access bits */ | |
656 | VOP_ACCESS(vp, mode, NULL, error); | |
657 | return -error; | |
658 | } | |
659 | #else | |
416c6d5b | 660 | #define xfs_vn_permission NULL |
1da177e4 LT |
661 | #endif |
662 | ||
663 | STATIC int | |
416c6d5b | 664 | xfs_vn_getattr( |
1da177e4 LT |
665 | struct vfsmount *mnt, |
666 | struct dentry *dentry, | |
667 | struct kstat *stat) | |
668 | { | |
669 | struct inode *inode = dentry->d_inode; | |
670 | vnode_t *vp = LINVFS_GET_VP(inode); | |
671 | int error = 0; | |
672 | ||
673 | if (unlikely(vp->v_flag & VMODIFIED)) | |
674 | error = vn_revalidate(vp); | |
675 | if (!error) | |
676 | generic_fillattr(inode, stat); | |
677 | return 0; | |
678 | } | |
679 | ||
680 | STATIC int | |
416c6d5b | 681 | xfs_vn_setattr( |
1da177e4 LT |
682 | struct dentry *dentry, |
683 | struct iattr *attr) | |
684 | { | |
685 | struct inode *inode = dentry->d_inode; | |
686 | unsigned int ia_valid = attr->ia_valid; | |
687 | vnode_t *vp = LINVFS_GET_VP(inode); | |
220b5284 | 688 | vattr_t vattr = { 0 }; |
1da177e4 LT |
689 | int flags = 0; |
690 | int error; | |
691 | ||
1da177e4 LT |
692 | if (ia_valid & ATTR_UID) { |
693 | vattr.va_mask |= XFS_AT_UID; | |
694 | vattr.va_uid = attr->ia_uid; | |
695 | } | |
696 | if (ia_valid & ATTR_GID) { | |
697 | vattr.va_mask |= XFS_AT_GID; | |
698 | vattr.va_gid = attr->ia_gid; | |
699 | } | |
700 | if (ia_valid & ATTR_SIZE) { | |
701 | vattr.va_mask |= XFS_AT_SIZE; | |
702 | vattr.va_size = attr->ia_size; | |
703 | } | |
704 | if (ia_valid & ATTR_ATIME) { | |
705 | vattr.va_mask |= XFS_AT_ATIME; | |
706 | vattr.va_atime = attr->ia_atime; | |
9bd6f13d NS |
707 | if (ia_valid & ATTR_ATIME_SET) |
708 | inode->i_atime = attr->ia_atime; | |
1da177e4 LT |
709 | } |
710 | if (ia_valid & ATTR_MTIME) { | |
711 | vattr.va_mask |= XFS_AT_MTIME; | |
712 | vattr.va_mtime = attr->ia_mtime; | |
713 | } | |
714 | if (ia_valid & ATTR_CTIME) { | |
715 | vattr.va_mask |= XFS_AT_CTIME; | |
716 | vattr.va_ctime = attr->ia_ctime; | |
717 | } | |
718 | if (ia_valid & ATTR_MODE) { | |
719 | vattr.va_mask |= XFS_AT_MODE; | |
720 | vattr.va_mode = attr->ia_mode; | |
721 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
722 | inode->i_mode &= ~S_ISGID; | |
723 | } | |
724 | ||
725 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
726 | flags |= ATTR_UTIME; | |
727 | #ifdef ATTR_NO_BLOCK | |
728 | if ((ia_valid & ATTR_NO_BLOCK)) | |
729 | flags |= ATTR_NONBLOCK; | |
730 | #endif | |
731 | ||
732 | VOP_SETATTR(vp, &vattr, flags, NULL, error); | |
220b5284 NS |
733 | if (likely(!error)) |
734 | __vn_revalidate(vp, &vattr); | |
735 | return -error; | |
1da177e4 LT |
736 | } |
737 | ||
738 | STATIC void | |
416c6d5b | 739 | xfs_vn_truncate( |
1da177e4 LT |
740 | struct inode *inode) |
741 | { | |
e4c573bb | 742 | block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_block); |
1da177e4 LT |
743 | } |
744 | ||
745 | STATIC int | |
416c6d5b | 746 | xfs_vn_setxattr( |
1da177e4 LT |
747 | struct dentry *dentry, |
748 | const char *name, | |
749 | const void *data, | |
750 | size_t size, | |
751 | int flags) | |
752 | { | |
753 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
754 | char *attr = (char *)name; | |
755 | attrnames_t *namesp; | |
756 | int xflags = 0; | |
757 | int error; | |
758 | ||
759 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
760 | if (!namesp) | |
761 | return -EOPNOTSUPP; | |
762 | attr += namesp->attr_namelen; | |
763 | error = namesp->attr_capable(vp, NULL); | |
764 | if (error) | |
765 | return error; | |
766 | ||
767 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
768 | if (flags & XATTR_CREATE) | |
769 | xflags |= ATTR_CREATE; | |
770 | if (flags & XATTR_REPLACE) | |
771 | xflags |= ATTR_REPLACE; | |
772 | xflags |= namesp->attr_flag; | |
773 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
774 | } | |
775 | ||
776 | STATIC ssize_t | |
416c6d5b | 777 | xfs_vn_getxattr( |
1da177e4 LT |
778 | struct dentry *dentry, |
779 | const char *name, | |
780 | void *data, | |
781 | size_t size) | |
782 | { | |
783 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
784 | char *attr = (char *)name; | |
785 | attrnames_t *namesp; | |
786 | int xflags = 0; | |
787 | ssize_t error; | |
788 | ||
789 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
790 | if (!namesp) | |
791 | return -EOPNOTSUPP; | |
792 | attr += namesp->attr_namelen; | |
793 | error = namesp->attr_capable(vp, NULL); | |
794 | if (error) | |
795 | return error; | |
796 | ||
797 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
798 | if (!size) { | |
799 | xflags |= ATTR_KERNOVAL; | |
800 | data = NULL; | |
801 | } | |
802 | xflags |= namesp->attr_flag; | |
803 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
804 | } | |
805 | ||
806 | STATIC ssize_t | |
416c6d5b | 807 | xfs_vn_listxattr( |
1da177e4 LT |
808 | struct dentry *dentry, |
809 | char *data, | |
810 | size_t size) | |
811 | { | |
812 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
813 | int error, xflags = ATTR_KERNAMELS; | |
814 | ssize_t result; | |
815 | ||
816 | if (!size) | |
817 | xflags |= ATTR_KERNOVAL; | |
818 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
819 | ||
820 | error = attr_generic_list(vp, data, size, xflags, &result); | |
821 | if (error < 0) | |
822 | return error; | |
823 | return result; | |
824 | } | |
825 | ||
826 | STATIC int | |
416c6d5b | 827 | xfs_vn_removexattr( |
1da177e4 LT |
828 | struct dentry *dentry, |
829 | const char *name) | |
830 | { | |
831 | vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); | |
832 | char *attr = (char *)name; | |
833 | attrnames_t *namesp; | |
834 | int xflags = 0; | |
835 | int error; | |
836 | ||
837 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
838 | if (!namesp) | |
839 | return -EOPNOTSUPP; | |
840 | attr += namesp->attr_namelen; | |
841 | error = namesp->attr_capable(vp, NULL); | |
842 | if (error) | |
843 | return error; | |
844 | xflags |= namesp->attr_flag; | |
845 | return namesp->attr_remove(vp, attr, xflags); | |
846 | } | |
847 | ||
848 | ||
416c6d5b NS |
849 | struct inode_operations xfs_inode_operations = { |
850 | .permission = xfs_vn_permission, | |
851 | .truncate = xfs_vn_truncate, | |
852 | .getattr = xfs_vn_getattr, | |
853 | .setattr = xfs_vn_setattr, | |
854 | .setxattr = xfs_vn_setxattr, | |
855 | .getxattr = xfs_vn_getxattr, | |
856 | .listxattr = xfs_vn_listxattr, | |
857 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
858 | }; |
859 | ||
416c6d5b NS |
860 | struct inode_operations xfs_dir_inode_operations = { |
861 | .create = xfs_vn_create, | |
862 | .lookup = xfs_vn_lookup, | |
863 | .link = xfs_vn_link, | |
864 | .unlink = xfs_vn_unlink, | |
865 | .symlink = xfs_vn_symlink, | |
866 | .mkdir = xfs_vn_mkdir, | |
867 | .rmdir = xfs_vn_rmdir, | |
868 | .mknod = xfs_vn_mknod, | |
869 | .rename = xfs_vn_rename, | |
870 | .permission = xfs_vn_permission, | |
871 | .getattr = xfs_vn_getattr, | |
872 | .setattr = xfs_vn_setattr, | |
873 | .setxattr = xfs_vn_setxattr, | |
874 | .getxattr = xfs_vn_getxattr, | |
875 | .listxattr = xfs_vn_listxattr, | |
876 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
877 | }; |
878 | ||
416c6d5b | 879 | struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 880 | .readlink = generic_readlink, |
416c6d5b NS |
881 | .follow_link = xfs_vn_follow_link, |
882 | .put_link = xfs_vn_put_link, | |
883 | .permission = xfs_vn_permission, | |
884 | .getattr = xfs_vn_getattr, | |
885 | .setattr = xfs_vn_setattr, | |
886 | .setxattr = xfs_vn_setxattr, | |
887 | .getxattr = xfs_vn_getxattr, | |
888 | .listxattr = xfs_vn_listxattr, | |
889 | .removexattr = xfs_vn_removexattr, | |
1da177e4 | 890 | }; |