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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" | |
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 | ||
4aeb664c NS |
73 | /* |
74 | * Change the requested timestamp in the given inode. | |
75 | * We don't lock across timestamp updates, and we don't log them but | |
76 | * we do record the fact that there is dirty information in core. | |
77 | * | |
78 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
79 | * with XFS_ICHGTIME_ACC to be sure that access time | |
80 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
81 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
82 | * timestamp if the filesystem is mounted noacctm. | |
83 | */ | |
84 | void | |
85 | xfs_ichgtime( | |
86 | xfs_inode_t *ip, | |
87 | int flags) | |
88 | { | |
ec86dc02 | 89 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
4aeb664c NS |
90 | timespec_t tv; |
91 | ||
4aeb664c NS |
92 | nanotime(&tv); |
93 | if (flags & XFS_ICHGTIME_MOD) { | |
94 | inode->i_mtime = tv; | |
95 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
96 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
97 | } | |
98 | if (flags & XFS_ICHGTIME_ACC) { | |
99 | inode->i_atime = tv; | |
100 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
101 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
102 | } | |
103 | if (flags & XFS_ICHGTIME_CHG) { | |
104 | inode->i_ctime = tv; | |
105 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
106 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
107 | } | |
108 | ||
109 | /* | |
110 | * We update the i_update_core field _after_ changing | |
111 | * the timestamps in order to coordinate properly with | |
112 | * xfs_iflush() so that we don't lose timestamp updates. | |
113 | * This keeps us from having to hold the inode lock | |
114 | * while doing this. We use the SYNCHRONIZE macro to | |
115 | * ensure that the compiler does not reorder the update | |
116 | * of i_update_core above the timestamp updates above. | |
117 | */ | |
118 | SYNCHRONIZE(); | |
119 | ip->i_update_core = 1; | |
cf10e82b | 120 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
121 | mark_inode_dirty_sync(inode); |
122 | } | |
123 | ||
124 | /* | |
125 | * Variant on the above which avoids querying the system clock | |
126 | * in situations where we know the Linux inode timestamps have | |
127 | * just been updated (and so we can update our inode cheaply). | |
4aeb664c NS |
128 | */ |
129 | void | |
130 | xfs_ichgtime_fast( | |
131 | xfs_inode_t *ip, | |
132 | struct inode *inode, | |
133 | int flags) | |
134 | { | |
135 | timespec_t *tvp; | |
136 | ||
137 | /* | |
42fe2b1f CH |
138 | * Atime updates for read() & friends are handled lazily now, and |
139 | * explicit updates must go through xfs_ichgtime() | |
4aeb664c | 140 | */ |
42fe2b1f | 141 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
4aeb664c NS |
142 | |
143 | /* | |
42fe2b1f CH |
144 | * We're not supposed to change timestamps in readonly-mounted |
145 | * filesystems. Throw it away if anyone asks us. | |
4aeb664c | 146 | */ |
42fe2b1f | 147 | if (unlikely(IS_RDONLY(inode))) |
4aeb664c NS |
148 | return; |
149 | ||
150 | if (flags & XFS_ICHGTIME_MOD) { | |
151 | tvp = &inode->i_mtime; | |
152 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
153 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
154 | } | |
4aeb664c NS |
155 | if (flags & XFS_ICHGTIME_CHG) { |
156 | tvp = &inode->i_ctime; | |
157 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
158 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
159 | } | |
160 | ||
161 | /* | |
162 | * We update the i_update_core field _after_ changing | |
163 | * the timestamps in order to coordinate properly with | |
164 | * xfs_iflush() so that we don't lose timestamp updates. | |
165 | * This keeps us from having to hold the inode lock | |
166 | * while doing this. We use the SYNCHRONIZE macro to | |
167 | * ensure that the compiler does not reorder the update | |
168 | * of i_update_core above the timestamp updates above. | |
169 | */ | |
170 | SYNCHRONIZE(); | |
171 | ip->i_update_core = 1; | |
cf10e82b | 172 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
173 | mark_inode_dirty_sync(inode); |
174 | } | |
175 | ||
1da177e4 LT |
176 | |
177 | /* | |
178 | * Pull the link count and size up from the xfs inode to the linux inode | |
179 | */ | |
180 | STATIC void | |
416c6d5b | 181 | xfs_validate_fields( |
6572bc28 | 182 | struct inode *inode) |
1da177e4 | 183 | { |
6572bc28 CH |
184 | struct xfs_inode *ip = XFS_I(inode); |
185 | loff_t size; | |
186 | ||
187 | inode->i_nlink = ip->i_d.di_nlink; | |
188 | inode->i_blocks = | |
189 | XFS_FSB_TO_BB(ip->i_mount, ip->i_d.di_nblocks + | |
190 | ip->i_delayed_blks); | |
191 | /* we're under i_sem so i_size can't change under us */ | |
192 | size = XFS_ISIZE(ip); | |
193 | if (i_size_read(inode) != size) | |
194 | i_size_write(inode, size); | |
1da177e4 LT |
195 | } |
196 | ||
446ada4a NS |
197 | /* |
198 | * Hook in SELinux. This is not quite correct yet, what we really need | |
199 | * here (as we do for default ACLs) is a mechanism by which creation of | |
200 | * these attrs can be journalled at inode creation time (along with the | |
201 | * inode, of course, such that log replay can't cause these to be lost). | |
202 | */ | |
203 | STATIC int | |
416c6d5b | 204 | xfs_init_security( |
67fcaa73 | 205 | bhv_vnode_t *vp, |
446ada4a NS |
206 | struct inode *dir) |
207 | { | |
ec86dc02 | 208 | struct inode *ip = vn_to_inode(vp); |
446ada4a NS |
209 | size_t length; |
210 | void *value; | |
211 | char *name; | |
212 | int error; | |
213 | ||
214 | error = security_inode_init_security(ip, dir, &name, &value, &length); | |
215 | if (error) { | |
216 | if (error == -EOPNOTSUPP) | |
217 | return 0; | |
218 | return -error; | |
219 | } | |
220 | ||
739bfb2a CH |
221 | error = xfs_attr_set(XFS_I(ip), name, value, |
222 | length, ATTR_SECURE); | |
446ada4a | 223 | if (!error) |
b3aea4ed | 224 | xfs_iflags_set(XFS_I(ip), XFS_IMODIFIED); |
446ada4a NS |
225 | |
226 | kfree(name); | |
227 | kfree(value); | |
228 | return error; | |
229 | } | |
230 | ||
1da177e4 LT |
231 | /* |
232 | * Determine whether a process has a valid fs_struct (kernel daemons | |
233 | * like knfsd don't have an fs_struct). | |
234 | * | |
235 | * XXX(hch): nfsd is broken, better fix it instead. | |
236 | */ | |
7989cb8e | 237 | STATIC_INLINE int |
416c6d5b | 238 | xfs_has_fs_struct(struct task_struct *task) |
1da177e4 LT |
239 | { |
240 | return (task->fs != init_task.fs); | |
241 | } | |
242 | ||
7989cb8e | 243 | STATIC void |
416c6d5b | 244 | xfs_cleanup_inode( |
739bfb2a | 245 | struct inode *dir, |
67fcaa73 | 246 | bhv_vnode_t *vp, |
220b5284 | 247 | struct dentry *dentry, |
3a69c7dc YL |
248 | int mode) |
249 | { | |
250 | struct dentry teardown = {}; | |
3a69c7dc YL |
251 | |
252 | /* Oh, the horror. | |
220b5284 | 253 | * If we can't add the ACL or we fail in |
416c6d5b | 254 | * xfs_init_security we must back out. |
3a69c7dc YL |
255 | * ENOSPC can hit here, among other things. |
256 | */ | |
ec86dc02 | 257 | teardown.d_inode = vn_to_inode(vp); |
3a69c7dc YL |
258 | teardown.d_name = dentry->d_name; |
259 | ||
260 | if (S_ISDIR(mode)) | |
739bfb2a | 261 | xfs_rmdir(XFS_I(dir), &teardown); |
3a69c7dc | 262 | else |
739bfb2a | 263 | xfs_remove(XFS_I(dir), &teardown); |
3a69c7dc YL |
264 | VN_RELE(vp); |
265 | } | |
266 | ||
1da177e4 | 267 | STATIC int |
416c6d5b | 268 | xfs_vn_mknod( |
1da177e4 LT |
269 | struct inode *dir, |
270 | struct dentry *dentry, | |
271 | int mode, | |
272 | dev_t rdev) | |
273 | { | |
274 | struct inode *ip; | |
67fcaa73 | 275 | bhv_vnode_t *vp = NULL, *dvp = vn_from_inode(dir); |
1da177e4 LT |
276 | xfs_acl_t *default_acl = NULL; |
277 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
278 | int error; | |
279 | ||
280 | /* | |
281 | * Irix uses Missed'em'V split, but doesn't want to see | |
282 | * the upper 5 bits of (14bit) major. | |
283 | */ | |
220b5284 | 284 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
1da177e4 LT |
285 | return -EINVAL; |
286 | ||
220b5284 NS |
287 | if (unlikely(test_default_acl && test_default_acl(dvp))) { |
288 | if (!_ACL_ALLOC(default_acl)) { | |
1da177e4 | 289 | return -ENOMEM; |
220b5284 | 290 | } |
1da177e4 LT |
291 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { |
292 | _ACL_FREE(default_acl); | |
293 | default_acl = NULL; | |
294 | } | |
295 | } | |
296 | ||
416c6d5b | 297 | if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current)) |
1da177e4 LT |
298 | mode &= ~current->fs->umask; |
299 | ||
1da177e4 LT |
300 | switch (mode & S_IFMT) { |
301 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
3e5daf05 | 302 | rdev = sysv_encode_dev(rdev); |
1da177e4 | 303 | case S_IFREG: |
3e5daf05 | 304 | error = xfs_create(XFS_I(dir), dentry, mode, rdev, &vp, NULL); |
1da177e4 LT |
305 | break; |
306 | case S_IFDIR: | |
3e5daf05 | 307 | error = xfs_mkdir(XFS_I(dir), dentry, mode, &vp, NULL); |
1da177e4 LT |
308 | break; |
309 | default: | |
310 | error = EINVAL; | |
311 | break; | |
312 | } | |
313 | ||
220b5284 | 314 | if (unlikely(!error)) { |
416c6d5b | 315 | error = xfs_init_security(vp, dir); |
3a69c7dc | 316 | if (error) |
739bfb2a | 317 | xfs_cleanup_inode(dir, vp, dentry, mode); |
3a69c7dc | 318 | } |
446ada4a | 319 | |
220b5284 | 320 | if (unlikely(default_acl)) { |
1da177e4 | 321 | if (!error) { |
3e5daf05 | 322 | error = _ACL_INHERIT(vp, mode, default_acl); |
220b5284 | 323 | if (!error) |
0a74cd19 | 324 | xfs_iflags_set(XFS_I(vp), XFS_IMODIFIED); |
3a69c7dc | 325 | else |
739bfb2a | 326 | xfs_cleanup_inode(dir, vp, dentry, mode); |
1da177e4 LT |
327 | } |
328 | _ACL_FREE(default_acl); | |
329 | } | |
330 | ||
220b5284 | 331 | if (likely(!error)) { |
1da177e4 | 332 | ASSERT(vp); |
ec86dc02 | 333 | ip = vn_to_inode(vp); |
1da177e4 | 334 | |
bad60fdd | 335 | if (S_ISDIR(mode)) |
6572bc28 | 336 | xfs_validate_fields(ip); |
1da177e4 | 337 | d_instantiate(dentry, ip); |
6572bc28 | 338 | xfs_validate_fields(dir); |
1da177e4 LT |
339 | } |
340 | return -error; | |
341 | } | |
342 | ||
343 | STATIC int | |
416c6d5b | 344 | xfs_vn_create( |
1da177e4 LT |
345 | struct inode *dir, |
346 | struct dentry *dentry, | |
347 | int mode, | |
348 | struct nameidata *nd) | |
349 | { | |
416c6d5b | 350 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
351 | } |
352 | ||
353 | STATIC int | |
416c6d5b | 354 | xfs_vn_mkdir( |
1da177e4 LT |
355 | struct inode *dir, |
356 | struct dentry *dentry, | |
357 | int mode) | |
358 | { | |
416c6d5b | 359 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
360 | } |
361 | ||
362 | STATIC struct dentry * | |
416c6d5b | 363 | xfs_vn_lookup( |
1da177e4 LT |
364 | struct inode *dir, |
365 | struct dentry *dentry, | |
366 | struct nameidata *nd) | |
367 | { | |
739bfb2a | 368 | bhv_vnode_t *cvp; |
1da177e4 LT |
369 | int error; |
370 | ||
371 | if (dentry->d_name.len >= MAXNAMELEN) | |
372 | return ERR_PTR(-ENAMETOOLONG); | |
373 | ||
739bfb2a | 374 | error = xfs_lookup(XFS_I(dir), dentry, &cvp); |
67fcaa73 | 375 | if (unlikely(error)) { |
1da177e4 LT |
376 | if (unlikely(error != ENOENT)) |
377 | return ERR_PTR(-error); | |
378 | d_add(dentry, NULL); | |
379 | return NULL; | |
380 | } | |
381 | ||
ec86dc02 | 382 | return d_splice_alias(vn_to_inode(cvp), dentry); |
1da177e4 LT |
383 | } |
384 | ||
385 | STATIC int | |
416c6d5b | 386 | xfs_vn_link( |
1da177e4 LT |
387 | struct dentry *old_dentry, |
388 | struct inode *dir, | |
389 | struct dentry *dentry) | |
390 | { | |
391 | struct inode *ip; /* inode of guy being linked to */ | |
67fcaa73 | 392 | bhv_vnode_t *vp; /* vp of name being linked */ |
1da177e4 LT |
393 | int error; |
394 | ||
395 | ip = old_dentry->d_inode; /* inode being linked to */ | |
ec86dc02 | 396 | vp = vn_from_inode(ip); |
1da177e4 | 397 | |
97dfd70c | 398 | VN_HOLD(vp); |
739bfb2a | 399 | error = xfs_link(XFS_I(dir), vp, dentry); |
97dfd70c NS |
400 | if (unlikely(error)) { |
401 | VN_RELE(vp); | |
402 | } else { | |
b3aea4ed | 403 | xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED); |
6572bc28 | 404 | xfs_validate_fields(ip); |
1da177e4 LT |
405 | d_instantiate(dentry, ip); |
406 | } | |
407 | return -error; | |
408 | } | |
409 | ||
410 | STATIC int | |
416c6d5b | 411 | xfs_vn_unlink( |
1da177e4 LT |
412 | struct inode *dir, |
413 | struct dentry *dentry) | |
414 | { | |
415 | struct inode *inode; | |
1da177e4 LT |
416 | int error; |
417 | ||
418 | inode = dentry->d_inode; | |
1da177e4 | 419 | |
739bfb2a | 420 | error = xfs_remove(XFS_I(dir), dentry); |
220b5284 | 421 | if (likely(!error)) { |
6572bc28 CH |
422 | xfs_validate_fields(dir); /* size needs update */ |
423 | xfs_validate_fields(inode); | |
1da177e4 | 424 | } |
1da177e4 LT |
425 | return -error; |
426 | } | |
427 | ||
428 | STATIC int | |
416c6d5b | 429 | xfs_vn_symlink( |
1da177e4 LT |
430 | struct inode *dir, |
431 | struct dentry *dentry, | |
432 | const char *symname) | |
433 | { | |
434 | struct inode *ip; | |
67fcaa73 | 435 | bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */ |
1da177e4 | 436 | int error; |
3e5daf05 | 437 | mode_t mode; |
1da177e4 | 438 | |
1da177e4 LT |
439 | cvp = NULL; |
440 | ||
3e5daf05 | 441 | mode = S_IFLNK | |
0432dab2 | 442 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
1da177e4 | 443 | |
3e5daf05 CH |
444 | error = xfs_symlink(XFS_I(dir), dentry, (char *)symname, mode, |
445 | &cvp, NULL); | |
54245702 | 446 | if (likely(!error && cvp)) { |
416c6d5b | 447 | error = xfs_init_security(cvp, dir); |
54245702 | 448 | if (likely(!error)) { |
ec86dc02 | 449 | ip = vn_to_inode(cvp); |
54245702 | 450 | d_instantiate(dentry, ip); |
6572bc28 CH |
451 | xfs_validate_fields(dir); |
452 | xfs_validate_fields(ip); | |
ce9d37c2 | 453 | } else { |
739bfb2a | 454 | xfs_cleanup_inode(dir, cvp, dentry, 0); |
54245702 | 455 | } |
1da177e4 LT |
456 | } |
457 | return -error; | |
458 | } | |
459 | ||
460 | STATIC int | |
416c6d5b | 461 | xfs_vn_rmdir( |
1da177e4 LT |
462 | struct inode *dir, |
463 | struct dentry *dentry) | |
464 | { | |
465 | struct inode *inode = dentry->d_inode; | |
1da177e4 LT |
466 | int error; |
467 | ||
739bfb2a | 468 | error = xfs_rmdir(XFS_I(dir), dentry); |
220b5284 | 469 | if (likely(!error)) { |
6572bc28 CH |
470 | xfs_validate_fields(inode); |
471 | xfs_validate_fields(dir); | |
1da177e4 LT |
472 | } |
473 | return -error; | |
474 | } | |
475 | ||
476 | STATIC int | |
416c6d5b | 477 | xfs_vn_rename( |
1da177e4 LT |
478 | struct inode *odir, |
479 | struct dentry *odentry, | |
480 | struct inode *ndir, | |
481 | struct dentry *ndentry) | |
482 | { | |
483 | struct inode *new_inode = ndentry->d_inode; | |
67fcaa73 | 484 | bhv_vnode_t *tvp; /* target directory */ |
1da177e4 LT |
485 | int error; |
486 | ||
ec86dc02 | 487 | tvp = vn_from_inode(ndir); |
1da177e4 | 488 | |
739bfb2a | 489 | error = xfs_rename(XFS_I(odir), odentry, tvp, ndentry); |
220b5284 NS |
490 | if (likely(!error)) { |
491 | if (new_inode) | |
6572bc28 CH |
492 | xfs_validate_fields(new_inode); |
493 | xfs_validate_fields(odir); | |
220b5284 | 494 | if (ndir != odir) |
6572bc28 | 495 | xfs_validate_fields(ndir); |
220b5284 | 496 | } |
220b5284 | 497 | return -error; |
1da177e4 LT |
498 | } |
499 | ||
500 | /* | |
501 | * careful here - this function can get called recursively, so | |
502 | * we need to be very careful about how much stack we use. | |
503 | * uio is kmalloced for this reason... | |
504 | */ | |
008b150a | 505 | STATIC void * |
416c6d5b | 506 | xfs_vn_follow_link( |
1da177e4 LT |
507 | struct dentry *dentry, |
508 | struct nameidata *nd) | |
509 | { | |
1da177e4 | 510 | char *link; |
804c83c3 | 511 | int error = -ENOMEM; |
1da177e4 | 512 | |
f52720ca | 513 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
514 | if (!link) |
515 | goto out_err; | |
1da177e4 | 516 | |
739bfb2a | 517 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
518 | if (unlikely(error)) |
519 | goto out_kfree; | |
1da177e4 LT |
520 | |
521 | nd_set_link(nd, link); | |
008b150a | 522 | return NULL; |
804c83c3 CH |
523 | |
524 | out_kfree: | |
525 | kfree(link); | |
526 | out_err: | |
527 | nd_set_link(nd, ERR_PTR(error)); | |
528 | return NULL; | |
1da177e4 LT |
529 | } |
530 | ||
cde410a9 | 531 | STATIC void |
416c6d5b | 532 | xfs_vn_put_link( |
cde410a9 NS |
533 | struct dentry *dentry, |
534 | struct nameidata *nd, | |
535 | void *p) | |
1da177e4 | 536 | { |
cde410a9 NS |
537 | char *s = nd_get_link(nd); |
538 | ||
1da177e4 LT |
539 | if (!IS_ERR(s)) |
540 | kfree(s); | |
541 | } | |
542 | ||
543 | #ifdef CONFIG_XFS_POSIX_ACL | |
544 | STATIC int | |
416c6d5b | 545 | xfs_vn_permission( |
1da177e4 LT |
546 | struct inode *inode, |
547 | int mode, | |
548 | struct nameidata *nd) | |
549 | { | |
739bfb2a | 550 | return -xfs_access(XFS_I(inode), mode << 6, NULL); |
1da177e4 LT |
551 | } |
552 | #else | |
416c6d5b | 553 | #define xfs_vn_permission NULL |
1da177e4 LT |
554 | #endif |
555 | ||
556 | STATIC int | |
416c6d5b | 557 | xfs_vn_getattr( |
c43f4087 CH |
558 | struct vfsmount *mnt, |
559 | struct dentry *dentry, | |
560 | struct kstat *stat) | |
1da177e4 | 561 | { |
c43f4087 CH |
562 | struct inode *inode = dentry->d_inode; |
563 | struct xfs_inode *ip = XFS_I(inode); | |
564 | struct xfs_mount *mp = ip->i_mount; | |
565 | ||
566 | xfs_itrace_entry(ip); | |
567 | ||
568 | if (XFS_FORCED_SHUTDOWN(mp)) | |
569 | return XFS_ERROR(EIO); | |
570 | ||
571 | stat->size = XFS_ISIZE(ip); | |
572 | stat->dev = inode->i_sb->s_dev; | |
573 | stat->mode = ip->i_d.di_mode; | |
574 | stat->nlink = ip->i_d.di_nlink; | |
575 | stat->uid = ip->i_d.di_uid; | |
576 | stat->gid = ip->i_d.di_gid; | |
577 | stat->ino = ip->i_ino; | |
578 | #if XFS_BIG_INUMS | |
579 | stat->ino += mp->m_inoadd; | |
580 | #endif | |
581 | stat->atime = inode->i_atime; | |
582 | stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
583 | stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
584 | stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
585 | stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
586 | stat->blocks = | |
587 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
588 | ||
589 | ||
590 | switch (inode->i_mode & S_IFMT) { | |
591 | case S_IFBLK: | |
592 | case S_IFCHR: | |
593 | stat->blksize = BLKDEV_IOSIZE; | |
594 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
595 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
596 | break; | |
597 | default: | |
598 | if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) { | |
599 | /* | |
600 | * If the file blocks are being allocated from a | |
601 | * realtime volume, then return the inode's realtime | |
602 | * extent size or the realtime volume's extent size. | |
603 | */ | |
604 | stat->blksize = | |
605 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
606 | } else | |
607 | stat->blksize = xfs_preferred_iosize(mp); | |
608 | stat->rdev = 0; | |
609 | break; | |
69e23b9a | 610 | } |
c43f4087 CH |
611 | |
612 | return 0; | |
1da177e4 LT |
613 | } |
614 | ||
615 | STATIC int | |
416c6d5b | 616 | xfs_vn_setattr( |
1da177e4 LT |
617 | struct dentry *dentry, |
618 | struct iattr *attr) | |
619 | { | |
620 | struct inode *inode = dentry->d_inode; | |
621 | unsigned int ia_valid = attr->ia_valid; | |
8285fb58 | 622 | bhv_vattr_t vattr = { 0 }; |
1da177e4 LT |
623 | int flags = 0; |
624 | int error; | |
625 | ||
1da177e4 LT |
626 | if (ia_valid & ATTR_UID) { |
627 | vattr.va_mask |= XFS_AT_UID; | |
628 | vattr.va_uid = attr->ia_uid; | |
629 | } | |
630 | if (ia_valid & ATTR_GID) { | |
631 | vattr.va_mask |= XFS_AT_GID; | |
632 | vattr.va_gid = attr->ia_gid; | |
633 | } | |
634 | if (ia_valid & ATTR_SIZE) { | |
635 | vattr.va_mask |= XFS_AT_SIZE; | |
636 | vattr.va_size = attr->ia_size; | |
637 | } | |
638 | if (ia_valid & ATTR_ATIME) { | |
639 | vattr.va_mask |= XFS_AT_ATIME; | |
640 | vattr.va_atime = attr->ia_atime; | |
8c0b5113 | 641 | inode->i_atime = attr->ia_atime; |
1da177e4 LT |
642 | } |
643 | if (ia_valid & ATTR_MTIME) { | |
644 | vattr.va_mask |= XFS_AT_MTIME; | |
645 | vattr.va_mtime = attr->ia_mtime; | |
646 | } | |
647 | if (ia_valid & ATTR_CTIME) { | |
648 | vattr.va_mask |= XFS_AT_CTIME; | |
649 | vattr.va_ctime = attr->ia_ctime; | |
650 | } | |
651 | if (ia_valid & ATTR_MODE) { | |
652 | vattr.va_mask |= XFS_AT_MODE; | |
653 | vattr.va_mode = attr->ia_mode; | |
654 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
655 | inode->i_mode &= ~S_ISGID; | |
656 | } | |
657 | ||
658 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
659 | flags |= ATTR_UTIME; | |
660 | #ifdef ATTR_NO_BLOCK | |
661 | if ((ia_valid & ATTR_NO_BLOCK)) | |
662 | flags |= ATTR_NONBLOCK; | |
663 | #endif | |
664 | ||
739bfb2a | 665 | error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL); |
220b5284 | 666 | if (likely(!error)) |
21a62542 | 667 | vn_revalidate(vn_from_inode(inode)); |
220b5284 | 668 | return -error; |
1da177e4 LT |
669 | } |
670 | ||
671 | STATIC void | |
416c6d5b | 672 | xfs_vn_truncate( |
1da177e4 LT |
673 | struct inode *inode) |
674 | { | |
c2536668 | 675 | block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks); |
1da177e4 LT |
676 | } |
677 | ||
678 | STATIC int | |
416c6d5b | 679 | xfs_vn_setxattr( |
1da177e4 LT |
680 | struct dentry *dentry, |
681 | const char *name, | |
682 | const void *data, | |
683 | size_t size, | |
684 | int flags) | |
685 | { | |
67fcaa73 | 686 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
687 | char *attr = (char *)name; |
688 | attrnames_t *namesp; | |
689 | int xflags = 0; | |
690 | int error; | |
691 | ||
692 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
693 | if (!namesp) | |
694 | return -EOPNOTSUPP; | |
695 | attr += namesp->attr_namelen; | |
696 | error = namesp->attr_capable(vp, NULL); | |
697 | if (error) | |
698 | return error; | |
699 | ||
700 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
701 | if (flags & XATTR_CREATE) | |
702 | xflags |= ATTR_CREATE; | |
703 | if (flags & XATTR_REPLACE) | |
704 | xflags |= ATTR_REPLACE; | |
705 | xflags |= namesp->attr_flag; | |
706 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
707 | } | |
708 | ||
709 | STATIC ssize_t | |
416c6d5b | 710 | xfs_vn_getxattr( |
1da177e4 LT |
711 | struct dentry *dentry, |
712 | const char *name, | |
713 | void *data, | |
714 | size_t size) | |
715 | { | |
67fcaa73 | 716 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
717 | char *attr = (char *)name; |
718 | attrnames_t *namesp; | |
719 | int xflags = 0; | |
720 | ssize_t error; | |
721 | ||
722 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
723 | if (!namesp) | |
724 | return -EOPNOTSUPP; | |
725 | attr += namesp->attr_namelen; | |
726 | error = namesp->attr_capable(vp, NULL); | |
727 | if (error) | |
728 | return error; | |
729 | ||
730 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
731 | if (!size) { | |
732 | xflags |= ATTR_KERNOVAL; | |
733 | data = NULL; | |
734 | } | |
735 | xflags |= namesp->attr_flag; | |
736 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
737 | } | |
738 | ||
739 | STATIC ssize_t | |
416c6d5b | 740 | xfs_vn_listxattr( |
1da177e4 LT |
741 | struct dentry *dentry, |
742 | char *data, | |
743 | size_t size) | |
744 | { | |
67fcaa73 | 745 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
746 | int error, xflags = ATTR_KERNAMELS; |
747 | ssize_t result; | |
748 | ||
749 | if (!size) | |
750 | xflags |= ATTR_KERNOVAL; | |
751 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
752 | ||
753 | error = attr_generic_list(vp, data, size, xflags, &result); | |
754 | if (error < 0) | |
755 | return error; | |
756 | return result; | |
757 | } | |
758 | ||
759 | STATIC int | |
416c6d5b | 760 | xfs_vn_removexattr( |
1da177e4 LT |
761 | struct dentry *dentry, |
762 | const char *name) | |
763 | { | |
67fcaa73 | 764 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
765 | char *attr = (char *)name; |
766 | attrnames_t *namesp; | |
767 | int xflags = 0; | |
768 | int error; | |
769 | ||
770 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
771 | if (!namesp) | |
772 | return -EOPNOTSUPP; | |
773 | attr += namesp->attr_namelen; | |
774 | error = namesp->attr_capable(vp, NULL); | |
775 | if (error) | |
776 | return error; | |
777 | xflags |= namesp->attr_flag; | |
778 | return namesp->attr_remove(vp, attr, xflags); | |
779 | } | |
780 | ||
781 | ||
c5ef1c42 | 782 | const struct inode_operations xfs_inode_operations = { |
416c6d5b NS |
783 | .permission = xfs_vn_permission, |
784 | .truncate = xfs_vn_truncate, | |
785 | .getattr = xfs_vn_getattr, | |
786 | .setattr = xfs_vn_setattr, | |
787 | .setxattr = xfs_vn_setxattr, | |
788 | .getxattr = xfs_vn_getxattr, | |
789 | .listxattr = xfs_vn_listxattr, | |
790 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
791 | }; |
792 | ||
c5ef1c42 | 793 | const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
794 | .create = xfs_vn_create, |
795 | .lookup = xfs_vn_lookup, | |
796 | .link = xfs_vn_link, | |
797 | .unlink = xfs_vn_unlink, | |
798 | .symlink = xfs_vn_symlink, | |
799 | .mkdir = xfs_vn_mkdir, | |
800 | .rmdir = xfs_vn_rmdir, | |
801 | .mknod = xfs_vn_mknod, | |
802 | .rename = xfs_vn_rename, | |
803 | .permission = xfs_vn_permission, | |
804 | .getattr = xfs_vn_getattr, | |
805 | .setattr = xfs_vn_setattr, | |
806 | .setxattr = xfs_vn_setxattr, | |
807 | .getxattr = xfs_vn_getxattr, | |
808 | .listxattr = xfs_vn_listxattr, | |
809 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
810 | }; |
811 | ||
c5ef1c42 | 812 | const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 813 | .readlink = generic_readlink, |
416c6d5b NS |
814 | .follow_link = xfs_vn_follow_link, |
815 | .put_link = xfs_vn_put_link, | |
816 | .permission = xfs_vn_permission, | |
817 | .getattr = xfs_vn_getattr, | |
818 | .setattr = xfs_vn_setattr, | |
819 | .setxattr = xfs_vn_setxattr, | |
820 | .getxattr = xfs_vn_getxattr, | |
821 | .listxattr = xfs_vn_listxattr, | |
822 | .removexattr = xfs_vn_removexattr, | |
1da177e4 | 823 | }; |