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" | |
1da177e4 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_quota.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 | 34 | #include "xfs_dir2_sf.h" |
a844f451 | 35 | #include "xfs_attr_sf.h" |
1da177e4 LT |
36 | #include "xfs_dinode.h" |
37 | #include "xfs_inode.h" | |
38 | #include "xfs_bmap.h" | |
a844f451 NS |
39 | #include "xfs_btree.h" |
40 | #include "xfs_ialloc.h" | |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
43 | #include "xfs_itable.h" | |
44 | #include "xfs_rw.h" | |
45 | #include "xfs_acl.h" | |
1da177e4 LT |
46 | #include "xfs_attr.h" |
47 | #include "xfs_buf_item.h" | |
48 | #include "xfs_utils.h" | |
739bfb2a | 49 | #include "xfs_vnodeops.h" |
1da177e4 | 50 | |
16f7e0fe | 51 | #include <linux/capability.h> |
1da177e4 LT |
52 | #include <linux/xattr.h> |
53 | #include <linux/namei.h> | |
446ada4a | 54 | #include <linux/security.h> |
1da177e4 | 55 | |
42fe2b1f CH |
56 | /* |
57 | * Bring the atime in the XFS inode uptodate. | |
58 | * Used before logging the inode to disk or when the Linux inode goes away. | |
59 | */ | |
60 | void | |
61 | xfs_synchronize_atime( | |
62 | xfs_inode_t *ip) | |
63 | { | |
67fcaa73 | 64 | bhv_vnode_t *vp; |
42fe2b1f CH |
65 | |
66 | vp = XFS_ITOV_NULL(ip); | |
67 | if (vp) { | |
0a74cd19 CH |
68 | ip->i_d.di_atime.t_sec = (__int32_t)vp->i_atime.tv_sec; |
69 | ip->i_d.di_atime.t_nsec = (__int32_t)vp->i_atime.tv_nsec; | |
42fe2b1f CH |
70 | } |
71 | } | |
72 | ||
5d51eff4 DC |
73 | /* |
74 | * If the linux inode exists, mark it dirty. | |
75 | * Used when commiting a dirty inode into a transaction so that | |
76 | * the inode will get written back by the linux code | |
77 | */ | |
78 | void | |
79 | xfs_mark_inode_dirty_sync( | |
80 | xfs_inode_t *ip) | |
81 | { | |
82 | bhv_vnode_t *vp; | |
83 | ||
84 | vp = XFS_ITOV_NULL(ip); | |
85 | if (vp) | |
86 | mark_inode_dirty_sync(vn_to_inode(vp)); | |
87 | } | |
88 | ||
4aeb664c NS |
89 | /* |
90 | * Change the requested timestamp in the given inode. | |
91 | * We don't lock across timestamp updates, and we don't log them but | |
92 | * we do record the fact that there is dirty information in core. | |
93 | * | |
94 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
95 | * with XFS_ICHGTIME_ACC to be sure that access time | |
96 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
97 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
98 | * timestamp if the filesystem is mounted noacctm. | |
99 | */ | |
100 | void | |
101 | xfs_ichgtime( | |
102 | xfs_inode_t *ip, | |
103 | int flags) | |
104 | { | |
ec86dc02 | 105 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
4aeb664c NS |
106 | timespec_t tv; |
107 | ||
4aeb664c NS |
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; | |
cf10e82b | 136 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
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). | |
4aeb664c NS |
144 | */ |
145 | void | |
146 | xfs_ichgtime_fast( | |
147 | xfs_inode_t *ip, | |
148 | struct inode *inode, | |
149 | int flags) | |
150 | { | |
151 | timespec_t *tvp; | |
152 | ||
153 | /* | |
42fe2b1f CH |
154 | * Atime updates for read() & friends are handled lazily now, and |
155 | * explicit updates must go through xfs_ichgtime() | |
4aeb664c | 156 | */ |
42fe2b1f | 157 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
4aeb664c NS |
158 | |
159 | /* | |
42fe2b1f CH |
160 | * We're not supposed to change timestamps in readonly-mounted |
161 | * filesystems. Throw it away if anyone asks us. | |
4aeb664c | 162 | */ |
42fe2b1f | 163 | if (unlikely(IS_RDONLY(inode))) |
4aeb664c NS |
164 | return; |
165 | ||
166 | if (flags & XFS_ICHGTIME_MOD) { | |
167 | tvp = &inode->i_mtime; | |
168 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
169 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
170 | } | |
4aeb664c NS |
171 | if (flags & XFS_ICHGTIME_CHG) { |
172 | tvp = &inode->i_ctime; | |
173 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
174 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
175 | } | |
176 | ||
177 | /* | |
178 | * We update the i_update_core field _after_ changing | |
179 | * the timestamps in order to coordinate properly with | |
180 | * xfs_iflush() so that we don't lose timestamp updates. | |
181 | * This keeps us from having to hold the inode lock | |
182 | * while doing this. We use the SYNCHRONIZE macro to | |
183 | * ensure that the compiler does not reorder the update | |
184 | * of i_update_core above the timestamp updates above. | |
185 | */ | |
186 | SYNCHRONIZE(); | |
187 | ip->i_update_core = 1; | |
cf10e82b | 188 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
189 | mark_inode_dirty_sync(inode); |
190 | } | |
191 | ||
1da177e4 LT |
192 | |
193 | /* | |
194 | * Pull the link count and size up from the xfs inode to the linux inode | |
195 | */ | |
196 | STATIC void | |
416c6d5b | 197 | xfs_validate_fields( |
6572bc28 | 198 | struct inode *inode) |
1da177e4 | 199 | { |
6572bc28 CH |
200 | struct xfs_inode *ip = XFS_I(inode); |
201 | loff_t size; | |
202 | ||
203 | inode->i_nlink = ip->i_d.di_nlink; | |
204 | inode->i_blocks = | |
205 | XFS_FSB_TO_BB(ip->i_mount, ip->i_d.di_nblocks + | |
206 | ip->i_delayed_blks); | |
207 | /* we're under i_sem so i_size can't change under us */ | |
208 | size = XFS_ISIZE(ip); | |
209 | if (i_size_read(inode) != size) | |
210 | i_size_write(inode, size); | |
1da177e4 LT |
211 | } |
212 | ||
446ada4a NS |
213 | /* |
214 | * Hook in SELinux. This is not quite correct yet, what we really need | |
215 | * here (as we do for default ACLs) is a mechanism by which creation of | |
216 | * these attrs can be journalled at inode creation time (along with the | |
217 | * inode, of course, such that log replay can't cause these to be lost). | |
218 | */ | |
219 | STATIC int | |
416c6d5b | 220 | xfs_init_security( |
67fcaa73 | 221 | bhv_vnode_t *vp, |
446ada4a NS |
222 | struct inode *dir) |
223 | { | |
ec86dc02 | 224 | struct inode *ip = vn_to_inode(vp); |
446ada4a NS |
225 | size_t length; |
226 | void *value; | |
227 | char *name; | |
228 | int error; | |
229 | ||
230 | error = security_inode_init_security(ip, dir, &name, &value, &length); | |
231 | if (error) { | |
232 | if (error == -EOPNOTSUPP) | |
233 | return 0; | |
234 | return -error; | |
235 | } | |
236 | ||
739bfb2a CH |
237 | error = xfs_attr_set(XFS_I(ip), name, value, |
238 | length, ATTR_SECURE); | |
446ada4a | 239 | if (!error) |
b3aea4ed | 240 | xfs_iflags_set(XFS_I(ip), XFS_IMODIFIED); |
446ada4a NS |
241 | |
242 | kfree(name); | |
243 | kfree(value); | |
244 | return error; | |
245 | } | |
246 | ||
1da177e4 LT |
247 | /* |
248 | * Determine whether a process has a valid fs_struct (kernel daemons | |
249 | * like knfsd don't have an fs_struct). | |
250 | * | |
251 | * XXX(hch): nfsd is broken, better fix it instead. | |
252 | */ | |
7989cb8e | 253 | STATIC_INLINE int |
416c6d5b | 254 | xfs_has_fs_struct(struct task_struct *task) |
1da177e4 LT |
255 | { |
256 | return (task->fs != init_task.fs); | |
257 | } | |
258 | ||
7989cb8e | 259 | STATIC void |
416c6d5b | 260 | xfs_cleanup_inode( |
739bfb2a | 261 | struct inode *dir, |
67fcaa73 | 262 | bhv_vnode_t *vp, |
220b5284 | 263 | struct dentry *dentry, |
3a69c7dc YL |
264 | int mode) |
265 | { | |
266 | struct dentry teardown = {}; | |
3a69c7dc YL |
267 | |
268 | /* Oh, the horror. | |
220b5284 | 269 | * If we can't add the ACL or we fail in |
416c6d5b | 270 | * xfs_init_security we must back out. |
3a69c7dc YL |
271 | * ENOSPC can hit here, among other things. |
272 | */ | |
ec86dc02 | 273 | teardown.d_inode = vn_to_inode(vp); |
3a69c7dc YL |
274 | teardown.d_name = dentry->d_name; |
275 | ||
276 | if (S_ISDIR(mode)) | |
739bfb2a | 277 | xfs_rmdir(XFS_I(dir), &teardown); |
3a69c7dc | 278 | else |
739bfb2a | 279 | xfs_remove(XFS_I(dir), &teardown); |
3a69c7dc YL |
280 | VN_RELE(vp); |
281 | } | |
282 | ||
1da177e4 | 283 | STATIC int |
416c6d5b | 284 | xfs_vn_mknod( |
1da177e4 LT |
285 | struct inode *dir, |
286 | struct dentry *dentry, | |
287 | int mode, | |
288 | dev_t rdev) | |
289 | { | |
290 | struct inode *ip; | |
67fcaa73 | 291 | bhv_vnode_t *vp = NULL, *dvp = vn_from_inode(dir); |
1da177e4 LT |
292 | xfs_acl_t *default_acl = NULL; |
293 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
294 | int error; | |
295 | ||
296 | /* | |
297 | * Irix uses Missed'em'V split, but doesn't want to see | |
298 | * the upper 5 bits of (14bit) major. | |
299 | */ | |
220b5284 | 300 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
1da177e4 LT |
301 | return -EINVAL; |
302 | ||
220b5284 NS |
303 | if (unlikely(test_default_acl && test_default_acl(dvp))) { |
304 | if (!_ACL_ALLOC(default_acl)) { | |
1da177e4 | 305 | return -ENOMEM; |
220b5284 | 306 | } |
1da177e4 LT |
307 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { |
308 | _ACL_FREE(default_acl); | |
309 | default_acl = NULL; | |
310 | } | |
311 | } | |
312 | ||
416c6d5b | 313 | if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current)) |
1da177e4 LT |
314 | mode &= ~current->fs->umask; |
315 | ||
1da177e4 LT |
316 | switch (mode & S_IFMT) { |
317 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
3e5daf05 | 318 | rdev = sysv_encode_dev(rdev); |
1da177e4 | 319 | case S_IFREG: |
3e5daf05 | 320 | error = xfs_create(XFS_I(dir), dentry, mode, rdev, &vp, NULL); |
1da177e4 LT |
321 | break; |
322 | case S_IFDIR: | |
3e5daf05 | 323 | error = xfs_mkdir(XFS_I(dir), dentry, mode, &vp, NULL); |
1da177e4 LT |
324 | break; |
325 | default: | |
326 | error = EINVAL; | |
327 | break; | |
328 | } | |
329 | ||
220b5284 | 330 | if (unlikely(!error)) { |
416c6d5b | 331 | error = xfs_init_security(vp, dir); |
3a69c7dc | 332 | if (error) |
739bfb2a | 333 | xfs_cleanup_inode(dir, vp, dentry, mode); |
3a69c7dc | 334 | } |
446ada4a | 335 | |
220b5284 | 336 | if (unlikely(default_acl)) { |
1da177e4 | 337 | if (!error) { |
3e5daf05 | 338 | error = _ACL_INHERIT(vp, mode, default_acl); |
220b5284 | 339 | if (!error) |
0a74cd19 | 340 | xfs_iflags_set(XFS_I(vp), XFS_IMODIFIED); |
3a69c7dc | 341 | else |
739bfb2a | 342 | xfs_cleanup_inode(dir, vp, dentry, mode); |
1da177e4 LT |
343 | } |
344 | _ACL_FREE(default_acl); | |
345 | } | |
346 | ||
220b5284 | 347 | if (likely(!error)) { |
1da177e4 | 348 | ASSERT(vp); |
ec86dc02 | 349 | ip = vn_to_inode(vp); |
1da177e4 | 350 | |
bad60fdd | 351 | if (S_ISDIR(mode)) |
6572bc28 | 352 | xfs_validate_fields(ip); |
1da177e4 | 353 | d_instantiate(dentry, ip); |
6572bc28 | 354 | xfs_validate_fields(dir); |
1da177e4 LT |
355 | } |
356 | return -error; | |
357 | } | |
358 | ||
359 | STATIC int | |
416c6d5b | 360 | xfs_vn_create( |
1da177e4 LT |
361 | struct inode *dir, |
362 | struct dentry *dentry, | |
363 | int mode, | |
364 | struct nameidata *nd) | |
365 | { | |
416c6d5b | 366 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
367 | } |
368 | ||
369 | STATIC int | |
416c6d5b | 370 | xfs_vn_mkdir( |
1da177e4 LT |
371 | struct inode *dir, |
372 | struct dentry *dentry, | |
373 | int mode) | |
374 | { | |
416c6d5b | 375 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
376 | } |
377 | ||
378 | STATIC struct dentry * | |
416c6d5b | 379 | xfs_vn_lookup( |
1da177e4 LT |
380 | struct inode *dir, |
381 | struct dentry *dentry, | |
382 | struct nameidata *nd) | |
383 | { | |
739bfb2a | 384 | bhv_vnode_t *cvp; |
1da177e4 LT |
385 | int error; |
386 | ||
387 | if (dentry->d_name.len >= MAXNAMELEN) | |
388 | return ERR_PTR(-ENAMETOOLONG); | |
389 | ||
739bfb2a | 390 | error = xfs_lookup(XFS_I(dir), dentry, &cvp); |
67fcaa73 | 391 | if (unlikely(error)) { |
1da177e4 LT |
392 | if (unlikely(error != ENOENT)) |
393 | return ERR_PTR(-error); | |
394 | d_add(dentry, NULL); | |
395 | return NULL; | |
396 | } | |
397 | ||
ec86dc02 | 398 | return d_splice_alias(vn_to_inode(cvp), dentry); |
1da177e4 LT |
399 | } |
400 | ||
401 | STATIC int | |
416c6d5b | 402 | xfs_vn_link( |
1da177e4 LT |
403 | struct dentry *old_dentry, |
404 | struct inode *dir, | |
405 | struct dentry *dentry) | |
406 | { | |
407 | struct inode *ip; /* inode of guy being linked to */ | |
67fcaa73 | 408 | bhv_vnode_t *vp; /* vp of name being linked */ |
1da177e4 LT |
409 | int error; |
410 | ||
411 | ip = old_dentry->d_inode; /* inode being linked to */ | |
ec86dc02 | 412 | vp = vn_from_inode(ip); |
1da177e4 | 413 | |
97dfd70c | 414 | VN_HOLD(vp); |
739bfb2a | 415 | error = xfs_link(XFS_I(dir), vp, dentry); |
97dfd70c NS |
416 | if (unlikely(error)) { |
417 | VN_RELE(vp); | |
418 | } else { | |
b3aea4ed | 419 | xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED); |
6572bc28 | 420 | xfs_validate_fields(ip); |
1da177e4 LT |
421 | d_instantiate(dentry, ip); |
422 | } | |
423 | return -error; | |
424 | } | |
425 | ||
426 | STATIC int | |
416c6d5b | 427 | xfs_vn_unlink( |
1da177e4 LT |
428 | struct inode *dir, |
429 | struct dentry *dentry) | |
430 | { | |
431 | struct inode *inode; | |
1da177e4 LT |
432 | int error; |
433 | ||
434 | inode = dentry->d_inode; | |
1da177e4 | 435 | |
739bfb2a | 436 | error = xfs_remove(XFS_I(dir), dentry); |
220b5284 | 437 | if (likely(!error)) { |
6572bc28 CH |
438 | xfs_validate_fields(dir); /* size needs update */ |
439 | xfs_validate_fields(inode); | |
1da177e4 | 440 | } |
1da177e4 LT |
441 | return -error; |
442 | } | |
443 | ||
444 | STATIC int | |
416c6d5b | 445 | xfs_vn_symlink( |
1da177e4 LT |
446 | struct inode *dir, |
447 | struct dentry *dentry, | |
448 | const char *symname) | |
449 | { | |
450 | struct inode *ip; | |
67fcaa73 | 451 | bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */ |
1da177e4 | 452 | int error; |
3e5daf05 | 453 | mode_t mode; |
1da177e4 | 454 | |
1da177e4 LT |
455 | cvp = NULL; |
456 | ||
3e5daf05 | 457 | mode = S_IFLNK | |
0432dab2 | 458 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
1da177e4 | 459 | |
3e5daf05 CH |
460 | error = xfs_symlink(XFS_I(dir), dentry, (char *)symname, mode, |
461 | &cvp, NULL); | |
54245702 | 462 | if (likely(!error && cvp)) { |
416c6d5b | 463 | error = xfs_init_security(cvp, dir); |
54245702 | 464 | if (likely(!error)) { |
ec86dc02 | 465 | ip = vn_to_inode(cvp); |
54245702 | 466 | d_instantiate(dentry, ip); |
6572bc28 CH |
467 | xfs_validate_fields(dir); |
468 | xfs_validate_fields(ip); | |
ce9d37c2 | 469 | } else { |
739bfb2a | 470 | xfs_cleanup_inode(dir, cvp, dentry, 0); |
54245702 | 471 | } |
1da177e4 LT |
472 | } |
473 | return -error; | |
474 | } | |
475 | ||
476 | STATIC int | |
416c6d5b | 477 | xfs_vn_rmdir( |
1da177e4 LT |
478 | struct inode *dir, |
479 | struct dentry *dentry) | |
480 | { | |
481 | struct inode *inode = dentry->d_inode; | |
1da177e4 LT |
482 | int error; |
483 | ||
739bfb2a | 484 | error = xfs_rmdir(XFS_I(dir), dentry); |
220b5284 | 485 | if (likely(!error)) { |
6572bc28 CH |
486 | xfs_validate_fields(inode); |
487 | xfs_validate_fields(dir); | |
1da177e4 LT |
488 | } |
489 | return -error; | |
490 | } | |
491 | ||
492 | STATIC int | |
416c6d5b | 493 | xfs_vn_rename( |
1da177e4 LT |
494 | struct inode *odir, |
495 | struct dentry *odentry, | |
496 | struct inode *ndir, | |
497 | struct dentry *ndentry) | |
498 | { | |
499 | struct inode *new_inode = ndentry->d_inode; | |
67fcaa73 | 500 | bhv_vnode_t *tvp; /* target directory */ |
1da177e4 LT |
501 | int error; |
502 | ||
ec86dc02 | 503 | tvp = vn_from_inode(ndir); |
1da177e4 | 504 | |
739bfb2a | 505 | error = xfs_rename(XFS_I(odir), odentry, tvp, ndentry); |
220b5284 NS |
506 | if (likely(!error)) { |
507 | if (new_inode) | |
6572bc28 CH |
508 | xfs_validate_fields(new_inode); |
509 | xfs_validate_fields(odir); | |
220b5284 | 510 | if (ndir != odir) |
6572bc28 | 511 | xfs_validate_fields(ndir); |
220b5284 | 512 | } |
220b5284 | 513 | return -error; |
1da177e4 LT |
514 | } |
515 | ||
516 | /* | |
517 | * careful here - this function can get called recursively, so | |
518 | * we need to be very careful about how much stack we use. | |
519 | * uio is kmalloced for this reason... | |
520 | */ | |
008b150a | 521 | STATIC void * |
416c6d5b | 522 | xfs_vn_follow_link( |
1da177e4 LT |
523 | struct dentry *dentry, |
524 | struct nameidata *nd) | |
525 | { | |
1da177e4 | 526 | char *link; |
804c83c3 | 527 | int error = -ENOMEM; |
1da177e4 | 528 | |
f52720ca | 529 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
530 | if (!link) |
531 | goto out_err; | |
1da177e4 | 532 | |
739bfb2a | 533 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
534 | if (unlikely(error)) |
535 | goto out_kfree; | |
1da177e4 LT |
536 | |
537 | nd_set_link(nd, link); | |
008b150a | 538 | return NULL; |
804c83c3 CH |
539 | |
540 | out_kfree: | |
541 | kfree(link); | |
542 | out_err: | |
543 | nd_set_link(nd, ERR_PTR(error)); | |
544 | return NULL; | |
1da177e4 LT |
545 | } |
546 | ||
cde410a9 | 547 | STATIC void |
416c6d5b | 548 | xfs_vn_put_link( |
cde410a9 NS |
549 | struct dentry *dentry, |
550 | struct nameidata *nd, | |
551 | void *p) | |
1da177e4 | 552 | { |
cde410a9 NS |
553 | char *s = nd_get_link(nd); |
554 | ||
1da177e4 LT |
555 | if (!IS_ERR(s)) |
556 | kfree(s); | |
557 | } | |
558 | ||
559 | #ifdef CONFIG_XFS_POSIX_ACL | |
560 | STATIC int | |
416c6d5b | 561 | xfs_vn_permission( |
1da177e4 LT |
562 | struct inode *inode, |
563 | int mode, | |
564 | struct nameidata *nd) | |
565 | { | |
739bfb2a | 566 | return -xfs_access(XFS_I(inode), mode << 6, NULL); |
1da177e4 LT |
567 | } |
568 | #else | |
416c6d5b | 569 | #define xfs_vn_permission NULL |
1da177e4 LT |
570 | #endif |
571 | ||
572 | STATIC int | |
416c6d5b | 573 | xfs_vn_getattr( |
c43f4087 CH |
574 | struct vfsmount *mnt, |
575 | struct dentry *dentry, | |
576 | struct kstat *stat) | |
1da177e4 | 577 | { |
c43f4087 CH |
578 | struct inode *inode = dentry->d_inode; |
579 | struct xfs_inode *ip = XFS_I(inode); | |
580 | struct xfs_mount *mp = ip->i_mount; | |
581 | ||
582 | xfs_itrace_entry(ip); | |
583 | ||
584 | if (XFS_FORCED_SHUTDOWN(mp)) | |
585 | return XFS_ERROR(EIO); | |
586 | ||
587 | stat->size = XFS_ISIZE(ip); | |
588 | stat->dev = inode->i_sb->s_dev; | |
589 | stat->mode = ip->i_d.di_mode; | |
590 | stat->nlink = ip->i_d.di_nlink; | |
591 | stat->uid = ip->i_d.di_uid; | |
592 | stat->gid = ip->i_d.di_gid; | |
593 | stat->ino = ip->i_ino; | |
594 | #if XFS_BIG_INUMS | |
595 | stat->ino += mp->m_inoadd; | |
596 | #endif | |
597 | stat->atime = inode->i_atime; | |
598 | stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
599 | stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
600 | stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
601 | stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
602 | stat->blocks = | |
603 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
604 | ||
605 | ||
606 | switch (inode->i_mode & S_IFMT) { | |
607 | case S_IFBLK: | |
608 | case S_IFCHR: | |
609 | stat->blksize = BLKDEV_IOSIZE; | |
610 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
611 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
612 | break; | |
613 | default: | |
614 | if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) { | |
615 | /* | |
616 | * If the file blocks are being allocated from a | |
617 | * realtime volume, then return the inode's realtime | |
618 | * extent size or the realtime volume's extent size. | |
619 | */ | |
620 | stat->blksize = | |
621 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
622 | } else | |
623 | stat->blksize = xfs_preferred_iosize(mp); | |
624 | stat->rdev = 0; | |
625 | break; | |
69e23b9a | 626 | } |
c43f4087 CH |
627 | |
628 | return 0; | |
1da177e4 LT |
629 | } |
630 | ||
631 | STATIC int | |
416c6d5b | 632 | xfs_vn_setattr( |
1da177e4 LT |
633 | struct dentry *dentry, |
634 | struct iattr *attr) | |
635 | { | |
636 | struct inode *inode = dentry->d_inode; | |
637 | unsigned int ia_valid = attr->ia_valid; | |
8285fb58 | 638 | bhv_vattr_t vattr = { 0 }; |
1da177e4 LT |
639 | int flags = 0; |
640 | int error; | |
641 | ||
1da177e4 LT |
642 | if (ia_valid & ATTR_UID) { |
643 | vattr.va_mask |= XFS_AT_UID; | |
644 | vattr.va_uid = attr->ia_uid; | |
645 | } | |
646 | if (ia_valid & ATTR_GID) { | |
647 | vattr.va_mask |= XFS_AT_GID; | |
648 | vattr.va_gid = attr->ia_gid; | |
649 | } | |
650 | if (ia_valid & ATTR_SIZE) { | |
651 | vattr.va_mask |= XFS_AT_SIZE; | |
652 | vattr.va_size = attr->ia_size; | |
653 | } | |
654 | if (ia_valid & ATTR_ATIME) { | |
655 | vattr.va_mask |= XFS_AT_ATIME; | |
656 | vattr.va_atime = attr->ia_atime; | |
8c0b5113 | 657 | inode->i_atime = attr->ia_atime; |
1da177e4 LT |
658 | } |
659 | if (ia_valid & ATTR_MTIME) { | |
660 | vattr.va_mask |= XFS_AT_MTIME; | |
661 | vattr.va_mtime = attr->ia_mtime; | |
662 | } | |
663 | if (ia_valid & ATTR_CTIME) { | |
664 | vattr.va_mask |= XFS_AT_CTIME; | |
665 | vattr.va_ctime = attr->ia_ctime; | |
666 | } | |
667 | if (ia_valid & ATTR_MODE) { | |
668 | vattr.va_mask |= XFS_AT_MODE; | |
669 | vattr.va_mode = attr->ia_mode; | |
670 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
671 | inode->i_mode &= ~S_ISGID; | |
672 | } | |
673 | ||
674 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
675 | flags |= ATTR_UTIME; | |
676 | #ifdef ATTR_NO_BLOCK | |
677 | if ((ia_valid & ATTR_NO_BLOCK)) | |
678 | flags |= ATTR_NONBLOCK; | |
679 | #endif | |
680 | ||
739bfb2a | 681 | error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL); |
220b5284 | 682 | if (likely(!error)) |
21a62542 | 683 | vn_revalidate(vn_from_inode(inode)); |
220b5284 | 684 | return -error; |
1da177e4 LT |
685 | } |
686 | ||
687 | STATIC void | |
416c6d5b | 688 | xfs_vn_truncate( |
1da177e4 LT |
689 | struct inode *inode) |
690 | { | |
c2536668 | 691 | block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks); |
1da177e4 LT |
692 | } |
693 | ||
694 | STATIC int | |
416c6d5b | 695 | xfs_vn_setxattr( |
1da177e4 LT |
696 | struct dentry *dentry, |
697 | const char *name, | |
698 | const void *data, | |
699 | size_t size, | |
700 | int flags) | |
701 | { | |
67fcaa73 | 702 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
703 | char *attr = (char *)name; |
704 | attrnames_t *namesp; | |
705 | int xflags = 0; | |
706 | int error; | |
707 | ||
708 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
709 | if (!namesp) | |
710 | return -EOPNOTSUPP; | |
711 | attr += namesp->attr_namelen; | |
712 | error = namesp->attr_capable(vp, NULL); | |
713 | if (error) | |
714 | return error; | |
715 | ||
716 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
717 | if (flags & XATTR_CREATE) | |
718 | xflags |= ATTR_CREATE; | |
719 | if (flags & XATTR_REPLACE) | |
720 | xflags |= ATTR_REPLACE; | |
721 | xflags |= namesp->attr_flag; | |
722 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
723 | } | |
724 | ||
725 | STATIC ssize_t | |
416c6d5b | 726 | xfs_vn_getxattr( |
1da177e4 LT |
727 | struct dentry *dentry, |
728 | const char *name, | |
729 | void *data, | |
730 | size_t size) | |
731 | { | |
67fcaa73 | 732 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
733 | char *attr = (char *)name; |
734 | attrnames_t *namesp; | |
735 | int xflags = 0; | |
736 | ssize_t error; | |
737 | ||
738 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
739 | if (!namesp) | |
740 | return -EOPNOTSUPP; | |
741 | attr += namesp->attr_namelen; | |
742 | error = namesp->attr_capable(vp, NULL); | |
743 | if (error) | |
744 | return error; | |
745 | ||
746 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
747 | if (!size) { | |
748 | xflags |= ATTR_KERNOVAL; | |
749 | data = NULL; | |
750 | } | |
751 | xflags |= namesp->attr_flag; | |
752 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
753 | } | |
754 | ||
755 | STATIC ssize_t | |
416c6d5b | 756 | xfs_vn_listxattr( |
1da177e4 LT |
757 | struct dentry *dentry, |
758 | char *data, | |
759 | size_t size) | |
760 | { | |
67fcaa73 | 761 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
762 | int error, xflags = ATTR_KERNAMELS; |
763 | ssize_t result; | |
764 | ||
765 | if (!size) | |
766 | xflags |= ATTR_KERNOVAL; | |
767 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
768 | ||
769 | error = attr_generic_list(vp, data, size, xflags, &result); | |
770 | if (error < 0) | |
771 | return error; | |
772 | return result; | |
773 | } | |
774 | ||
775 | STATIC int | |
416c6d5b | 776 | xfs_vn_removexattr( |
1da177e4 LT |
777 | struct dentry *dentry, |
778 | const char *name) | |
779 | { | |
67fcaa73 | 780 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
781 | char *attr = (char *)name; |
782 | attrnames_t *namesp; | |
783 | int xflags = 0; | |
784 | int error; | |
785 | ||
786 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
787 | if (!namesp) | |
788 | return -EOPNOTSUPP; | |
789 | attr += namesp->attr_namelen; | |
790 | error = namesp->attr_capable(vp, NULL); | |
791 | if (error) | |
792 | return error; | |
793 | xflags |= namesp->attr_flag; | |
794 | return namesp->attr_remove(vp, attr, xflags); | |
795 | } | |
796 | ||
797 | ||
c5ef1c42 | 798 | const struct inode_operations xfs_inode_operations = { |
416c6d5b NS |
799 | .permission = xfs_vn_permission, |
800 | .truncate = xfs_vn_truncate, | |
801 | .getattr = xfs_vn_getattr, | |
802 | .setattr = xfs_vn_setattr, | |
803 | .setxattr = xfs_vn_setxattr, | |
804 | .getxattr = xfs_vn_getxattr, | |
805 | .listxattr = xfs_vn_listxattr, | |
806 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
807 | }; |
808 | ||
c5ef1c42 | 809 | const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
810 | .create = xfs_vn_create, |
811 | .lookup = xfs_vn_lookup, | |
812 | .link = xfs_vn_link, | |
813 | .unlink = xfs_vn_unlink, | |
814 | .symlink = xfs_vn_symlink, | |
815 | .mkdir = xfs_vn_mkdir, | |
816 | .rmdir = xfs_vn_rmdir, | |
817 | .mknod = xfs_vn_mknod, | |
818 | .rename = xfs_vn_rename, | |
819 | .permission = xfs_vn_permission, | |
820 | .getattr = xfs_vn_getattr, | |
821 | .setattr = xfs_vn_setattr, | |
822 | .setxattr = xfs_vn_setxattr, | |
823 | .getxattr = xfs_vn_getxattr, | |
824 | .listxattr = xfs_vn_listxattr, | |
825 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
826 | }; |
827 | ||
c5ef1c42 | 828 | const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 829 | .readlink = generic_readlink, |
416c6d5b NS |
830 | .follow_link = xfs_vn_follow_link, |
831 | .put_link = xfs_vn_put_link, | |
832 | .permission = xfs_vn_permission, | |
833 | .getattr = xfs_vn_getattr, | |
834 | .setattr = xfs_vn_setattr, | |
835 | .setxattr = xfs_vn_setxattr, | |
836 | .getxattr = xfs_vn_getxattr, | |
837 | .listxattr = xfs_vn_listxattr, | |
838 | .removexattr = xfs_vn_removexattr, | |
1da177e4 | 839 | }; |