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> |
3ed65264 | 55 | #include <linux/falloc.h> |
1da177e4 | 56 | |
42fe2b1f CH |
57 | /* |
58 | * Bring the atime in the XFS inode uptodate. | |
59 | * Used before logging the inode to disk or when the Linux inode goes away. | |
60 | */ | |
61 | void | |
62 | xfs_synchronize_atime( | |
63 | xfs_inode_t *ip) | |
64 | { | |
67fcaa73 | 65 | bhv_vnode_t *vp; |
42fe2b1f CH |
66 | |
67 | vp = XFS_ITOV_NULL(ip); | |
68 | if (vp) { | |
0a74cd19 CH |
69 | ip->i_d.di_atime.t_sec = (__int32_t)vp->i_atime.tv_sec; |
70 | ip->i_d.di_atime.t_nsec = (__int32_t)vp->i_atime.tv_nsec; | |
42fe2b1f CH |
71 | } |
72 | } | |
73 | ||
5d51eff4 DC |
74 | /* |
75 | * If the linux inode exists, mark it dirty. | |
76 | * Used when commiting a dirty inode into a transaction so that | |
77 | * the inode will get written back by the linux code | |
78 | */ | |
79 | void | |
80 | xfs_mark_inode_dirty_sync( | |
81 | xfs_inode_t *ip) | |
82 | { | |
83 | bhv_vnode_t *vp; | |
84 | ||
85 | vp = XFS_ITOV_NULL(ip); | |
86 | if (vp) | |
87 | mark_inode_dirty_sync(vn_to_inode(vp)); | |
88 | } | |
89 | ||
4aeb664c NS |
90 | /* |
91 | * Change the requested timestamp in the given inode. | |
92 | * We don't lock across timestamp updates, and we don't log them but | |
93 | * we do record the fact that there is dirty information in core. | |
94 | * | |
95 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
96 | * with XFS_ICHGTIME_ACC to be sure that access time | |
97 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
98 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
99 | * timestamp if the filesystem is mounted noacctm. | |
100 | */ | |
101 | void | |
102 | xfs_ichgtime( | |
103 | xfs_inode_t *ip, | |
104 | int flags) | |
105 | { | |
ec86dc02 | 106 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
4aeb664c NS |
107 | timespec_t tv; |
108 | ||
4aeb664c NS |
109 | nanotime(&tv); |
110 | if (flags & XFS_ICHGTIME_MOD) { | |
111 | inode->i_mtime = tv; | |
112 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
113 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
114 | } | |
115 | if (flags & XFS_ICHGTIME_ACC) { | |
116 | inode->i_atime = tv; | |
117 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
118 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
119 | } | |
120 | if (flags & XFS_ICHGTIME_CHG) { | |
121 | inode->i_ctime = tv; | |
122 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
123 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
124 | } | |
125 | ||
126 | /* | |
127 | * We update the i_update_core field _after_ changing | |
128 | * the timestamps in order to coordinate properly with | |
129 | * xfs_iflush() so that we don't lose timestamp updates. | |
130 | * This keeps us from having to hold the inode lock | |
131 | * while doing this. We use the SYNCHRONIZE macro to | |
132 | * ensure that the compiler does not reorder the update | |
133 | * of i_update_core above the timestamp updates above. | |
134 | */ | |
135 | SYNCHRONIZE(); | |
136 | ip->i_update_core = 1; | |
cf10e82b | 137 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
138 | mark_inode_dirty_sync(inode); |
139 | } | |
140 | ||
141 | /* | |
142 | * Variant on the above which avoids querying the system clock | |
143 | * in situations where we know the Linux inode timestamps have | |
144 | * just been updated (and so we can update our inode cheaply). | |
4aeb664c NS |
145 | */ |
146 | void | |
147 | xfs_ichgtime_fast( | |
148 | xfs_inode_t *ip, | |
149 | struct inode *inode, | |
150 | int flags) | |
151 | { | |
152 | timespec_t *tvp; | |
153 | ||
154 | /* | |
42fe2b1f CH |
155 | * Atime updates for read() & friends are handled lazily now, and |
156 | * explicit updates must go through xfs_ichgtime() | |
4aeb664c | 157 | */ |
42fe2b1f | 158 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
4aeb664c NS |
159 | |
160 | /* | |
42fe2b1f CH |
161 | * We're not supposed to change timestamps in readonly-mounted |
162 | * filesystems. Throw it away if anyone asks us. | |
4aeb664c | 163 | */ |
42fe2b1f | 164 | if (unlikely(IS_RDONLY(inode))) |
4aeb664c NS |
165 | return; |
166 | ||
167 | if (flags & XFS_ICHGTIME_MOD) { | |
168 | tvp = &inode->i_mtime; | |
169 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
170 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
171 | } | |
4aeb664c NS |
172 | if (flags & XFS_ICHGTIME_CHG) { |
173 | tvp = &inode->i_ctime; | |
174 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
175 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
176 | } | |
177 | ||
178 | /* | |
179 | * We update the i_update_core field _after_ changing | |
180 | * the timestamps in order to coordinate properly with | |
181 | * xfs_iflush() so that we don't lose timestamp updates. | |
182 | * This keeps us from having to hold the inode lock | |
183 | * while doing this. We use the SYNCHRONIZE macro to | |
184 | * ensure that the compiler does not reorder the update | |
185 | * of i_update_core above the timestamp updates above. | |
186 | */ | |
187 | SYNCHRONIZE(); | |
188 | ip->i_update_core = 1; | |
cf10e82b | 189 | if (!(inode->i_state & I_NEW)) |
4aeb664c NS |
190 | mark_inode_dirty_sync(inode); |
191 | } | |
192 | ||
1da177e4 LT |
193 | |
194 | /* | |
195 | * Pull the link count and size up from the xfs inode to the linux inode | |
196 | */ | |
197 | STATIC void | |
416c6d5b | 198 | xfs_validate_fields( |
6572bc28 | 199 | struct inode *inode) |
1da177e4 | 200 | { |
6572bc28 CH |
201 | struct xfs_inode *ip = XFS_I(inode); |
202 | loff_t size; | |
203 | ||
6572bc28 CH |
204 | /* we're under i_sem so i_size can't change under us */ |
205 | size = XFS_ISIZE(ip); | |
206 | if (i_size_read(inode) != size) | |
207 | i_size_write(inode, size); | |
1da177e4 LT |
208 | } |
209 | ||
446ada4a NS |
210 | /* |
211 | * Hook in SELinux. This is not quite correct yet, what we really need | |
212 | * here (as we do for default ACLs) is a mechanism by which creation of | |
213 | * these attrs can be journalled at inode creation time (along with the | |
214 | * inode, of course, such that log replay can't cause these to be lost). | |
215 | */ | |
216 | STATIC int | |
416c6d5b | 217 | xfs_init_security( |
67fcaa73 | 218 | bhv_vnode_t *vp, |
446ada4a NS |
219 | struct inode *dir) |
220 | { | |
ec86dc02 | 221 | struct inode *ip = vn_to_inode(vp); |
446ada4a NS |
222 | size_t length; |
223 | void *value; | |
224 | char *name; | |
225 | int error; | |
226 | ||
227 | error = security_inode_init_security(ip, dir, &name, &value, &length); | |
228 | if (error) { | |
229 | if (error == -EOPNOTSUPP) | |
230 | return 0; | |
231 | return -error; | |
232 | } | |
233 | ||
739bfb2a CH |
234 | error = xfs_attr_set(XFS_I(ip), name, value, |
235 | length, ATTR_SECURE); | |
446ada4a | 236 | if (!error) |
b3aea4ed | 237 | xfs_iflags_set(XFS_I(ip), XFS_IMODIFIED); |
446ada4a NS |
238 | |
239 | kfree(name); | |
240 | kfree(value); | |
241 | return error; | |
242 | } | |
243 | ||
7989cb8e | 244 | STATIC void |
416c6d5b | 245 | xfs_cleanup_inode( |
739bfb2a | 246 | struct inode *dir, |
67fcaa73 | 247 | bhv_vnode_t *vp, |
220b5284 | 248 | struct dentry *dentry, |
3a69c7dc YL |
249 | int mode) |
250 | { | |
251 | struct dentry teardown = {}; | |
3a69c7dc YL |
252 | |
253 | /* Oh, the horror. | |
220b5284 | 254 | * If we can't add the ACL or we fail in |
416c6d5b | 255 | * xfs_init_security we must back out. |
3a69c7dc YL |
256 | * ENOSPC can hit here, among other things. |
257 | */ | |
ec86dc02 | 258 | teardown.d_inode = vn_to_inode(vp); |
3a69c7dc YL |
259 | teardown.d_name = dentry->d_name; |
260 | ||
261 | if (S_ISDIR(mode)) | |
739bfb2a | 262 | xfs_rmdir(XFS_I(dir), &teardown); |
3a69c7dc | 263 | else |
739bfb2a | 264 | xfs_remove(XFS_I(dir), &teardown); |
3a69c7dc YL |
265 | VN_RELE(vp); |
266 | } | |
267 | ||
1da177e4 | 268 | STATIC int |
416c6d5b | 269 | xfs_vn_mknod( |
1da177e4 LT |
270 | struct inode *dir, |
271 | struct dentry *dentry, | |
272 | int mode, | |
273 | dev_t rdev) | |
274 | { | |
db0bb7ba | 275 | struct inode *inode; |
67fcaa73 | 276 | bhv_vnode_t *vp = NULL, *dvp = vn_from_inode(dir); |
1da177e4 LT |
277 | xfs_acl_t *default_acl = NULL; |
278 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
279 | int error; | |
280 | ||
281 | /* | |
282 | * Irix uses Missed'em'V split, but doesn't want to see | |
283 | * the upper 5 bits of (14bit) major. | |
284 | */ | |
220b5284 | 285 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
1da177e4 LT |
286 | return -EINVAL; |
287 | ||
db0bb7ba | 288 | if (test_default_acl && test_default_acl(dvp)) { |
220b5284 | 289 | if (!_ACL_ALLOC(default_acl)) { |
1da177e4 | 290 | return -ENOMEM; |
220b5284 | 291 | } |
1da177e4 LT |
292 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { |
293 | _ACL_FREE(default_acl); | |
294 | default_acl = NULL; | |
295 | } | |
296 | } | |
297 | ||
db0bb7ba | 298 | if (IS_POSIXACL(dir) && !default_acl) |
1da177e4 LT |
299 | mode &= ~current->fs->umask; |
300 | ||
1da177e4 | 301 | switch (mode & S_IFMT) { |
db0bb7ba CH |
302 | case S_IFCHR: |
303 | case S_IFBLK: | |
304 | case S_IFIFO: | |
305 | case S_IFSOCK: | |
3e5daf05 | 306 | rdev = sysv_encode_dev(rdev); |
1da177e4 | 307 | case S_IFREG: |
3e5daf05 | 308 | error = xfs_create(XFS_I(dir), dentry, mode, rdev, &vp, NULL); |
1da177e4 LT |
309 | break; |
310 | case S_IFDIR: | |
3e5daf05 | 311 | error = xfs_mkdir(XFS_I(dir), dentry, mode, &vp, NULL); |
1da177e4 LT |
312 | break; |
313 | default: | |
314 | error = EINVAL; | |
315 | break; | |
316 | } | |
317 | ||
db0bb7ba CH |
318 | if (unlikely(error)) |
319 | goto out_free_acl; | |
446ada4a | 320 | |
db0bb7ba CH |
321 | error = xfs_init_security(vp, dir); |
322 | if (unlikely(error)) | |
323 | goto out_cleanup_inode; | |
324 | ||
325 | if (default_acl) { | |
326 | error = _ACL_INHERIT(vp, mode, default_acl); | |
327 | if (unlikely(error)) | |
328 | goto out_cleanup_inode; | |
329 | xfs_iflags_set(XFS_I(vp), XFS_IMODIFIED); | |
1da177e4 LT |
330 | _ACL_FREE(default_acl); |
331 | } | |
332 | ||
db0bb7ba | 333 | inode = vn_to_inode(vp); |
1da177e4 | 334 | |
db0bb7ba CH |
335 | if (S_ISDIR(mode)) |
336 | xfs_validate_fields(inode); | |
337 | d_instantiate(dentry, inode); | |
338 | xfs_validate_fields(dir); | |
339 | return -error; | |
340 | ||
341 | out_cleanup_inode: | |
342 | xfs_cleanup_inode(dir, vp, dentry, mode); | |
343 | out_free_acl: | |
344 | if (default_acl) | |
345 | _ACL_FREE(default_acl); | |
1da177e4 LT |
346 | return -error; |
347 | } | |
348 | ||
349 | STATIC int | |
416c6d5b | 350 | xfs_vn_create( |
1da177e4 LT |
351 | struct inode *dir, |
352 | struct dentry *dentry, | |
353 | int mode, | |
354 | struct nameidata *nd) | |
355 | { | |
416c6d5b | 356 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
357 | } |
358 | ||
359 | STATIC int | |
416c6d5b | 360 | xfs_vn_mkdir( |
1da177e4 LT |
361 | struct inode *dir, |
362 | struct dentry *dentry, | |
363 | int mode) | |
364 | { | |
416c6d5b | 365 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
366 | } |
367 | ||
368 | STATIC struct dentry * | |
416c6d5b | 369 | xfs_vn_lookup( |
1da177e4 LT |
370 | struct inode *dir, |
371 | struct dentry *dentry, | |
372 | struct nameidata *nd) | |
373 | { | |
739bfb2a | 374 | bhv_vnode_t *cvp; |
1da177e4 LT |
375 | int error; |
376 | ||
377 | if (dentry->d_name.len >= MAXNAMELEN) | |
378 | return ERR_PTR(-ENAMETOOLONG); | |
379 | ||
739bfb2a | 380 | error = xfs_lookup(XFS_I(dir), dentry, &cvp); |
67fcaa73 | 381 | if (unlikely(error)) { |
1da177e4 LT |
382 | if (unlikely(error != ENOENT)) |
383 | return ERR_PTR(-error); | |
384 | d_add(dentry, NULL); | |
385 | return NULL; | |
386 | } | |
387 | ||
ec86dc02 | 388 | return d_splice_alias(vn_to_inode(cvp), dentry); |
1da177e4 LT |
389 | } |
390 | ||
391 | STATIC int | |
416c6d5b | 392 | xfs_vn_link( |
1da177e4 LT |
393 | struct dentry *old_dentry, |
394 | struct inode *dir, | |
395 | struct dentry *dentry) | |
396 | { | |
397 | struct inode *ip; /* inode of guy being linked to */ | |
67fcaa73 | 398 | bhv_vnode_t *vp; /* vp of name being linked */ |
1da177e4 LT |
399 | int error; |
400 | ||
401 | ip = old_dentry->d_inode; /* inode being linked to */ | |
ec86dc02 | 402 | vp = vn_from_inode(ip); |
1da177e4 | 403 | |
97dfd70c | 404 | VN_HOLD(vp); |
739bfb2a | 405 | error = xfs_link(XFS_I(dir), vp, dentry); |
97dfd70c NS |
406 | if (unlikely(error)) { |
407 | VN_RELE(vp); | |
408 | } else { | |
b3aea4ed | 409 | xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED); |
6572bc28 | 410 | xfs_validate_fields(ip); |
1da177e4 LT |
411 | d_instantiate(dentry, ip); |
412 | } | |
413 | return -error; | |
414 | } | |
415 | ||
416 | STATIC int | |
416c6d5b | 417 | xfs_vn_unlink( |
1da177e4 LT |
418 | struct inode *dir, |
419 | struct dentry *dentry) | |
420 | { | |
421 | struct inode *inode; | |
1da177e4 LT |
422 | int error; |
423 | ||
424 | inode = dentry->d_inode; | |
1da177e4 | 425 | |
739bfb2a | 426 | error = xfs_remove(XFS_I(dir), dentry); |
220b5284 | 427 | if (likely(!error)) { |
6572bc28 CH |
428 | xfs_validate_fields(dir); /* size needs update */ |
429 | xfs_validate_fields(inode); | |
1da177e4 | 430 | } |
1da177e4 LT |
431 | return -error; |
432 | } | |
433 | ||
434 | STATIC int | |
416c6d5b | 435 | xfs_vn_symlink( |
1da177e4 LT |
436 | struct inode *dir, |
437 | struct dentry *dentry, | |
438 | const char *symname) | |
439 | { | |
440 | struct inode *ip; | |
67fcaa73 | 441 | bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */ |
1da177e4 | 442 | int error; |
3e5daf05 | 443 | mode_t mode; |
1da177e4 | 444 | |
1da177e4 LT |
445 | cvp = NULL; |
446 | ||
3e5daf05 | 447 | mode = S_IFLNK | |
0432dab2 | 448 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
1da177e4 | 449 | |
3e5daf05 CH |
450 | error = xfs_symlink(XFS_I(dir), dentry, (char *)symname, mode, |
451 | &cvp, NULL); | |
54245702 | 452 | if (likely(!error && cvp)) { |
416c6d5b | 453 | error = xfs_init_security(cvp, dir); |
54245702 | 454 | if (likely(!error)) { |
ec86dc02 | 455 | ip = vn_to_inode(cvp); |
54245702 | 456 | d_instantiate(dentry, ip); |
6572bc28 CH |
457 | xfs_validate_fields(dir); |
458 | xfs_validate_fields(ip); | |
ce9d37c2 | 459 | } else { |
739bfb2a | 460 | xfs_cleanup_inode(dir, cvp, dentry, 0); |
54245702 | 461 | } |
1da177e4 LT |
462 | } |
463 | return -error; | |
464 | } | |
465 | ||
466 | STATIC int | |
416c6d5b | 467 | xfs_vn_rmdir( |
1da177e4 LT |
468 | struct inode *dir, |
469 | struct dentry *dentry) | |
470 | { | |
471 | struct inode *inode = dentry->d_inode; | |
1da177e4 LT |
472 | int error; |
473 | ||
739bfb2a | 474 | error = xfs_rmdir(XFS_I(dir), dentry); |
220b5284 | 475 | if (likely(!error)) { |
6572bc28 CH |
476 | xfs_validate_fields(inode); |
477 | xfs_validate_fields(dir); | |
1da177e4 LT |
478 | } |
479 | return -error; | |
480 | } | |
481 | ||
482 | STATIC int | |
416c6d5b | 483 | xfs_vn_rename( |
1da177e4 LT |
484 | struct inode *odir, |
485 | struct dentry *odentry, | |
486 | struct inode *ndir, | |
487 | struct dentry *ndentry) | |
488 | { | |
489 | struct inode *new_inode = ndentry->d_inode; | |
67fcaa73 | 490 | bhv_vnode_t *tvp; /* target directory */ |
1da177e4 LT |
491 | int error; |
492 | ||
ec86dc02 | 493 | tvp = vn_from_inode(ndir); |
1da177e4 | 494 | |
739bfb2a | 495 | error = xfs_rename(XFS_I(odir), odentry, tvp, ndentry); |
220b5284 NS |
496 | if (likely(!error)) { |
497 | if (new_inode) | |
6572bc28 CH |
498 | xfs_validate_fields(new_inode); |
499 | xfs_validate_fields(odir); | |
220b5284 | 500 | if (ndir != odir) |
6572bc28 | 501 | xfs_validate_fields(ndir); |
220b5284 | 502 | } |
220b5284 | 503 | return -error; |
1da177e4 LT |
504 | } |
505 | ||
506 | /* | |
507 | * careful here - this function can get called recursively, so | |
508 | * we need to be very careful about how much stack we use. | |
509 | * uio is kmalloced for this reason... | |
510 | */ | |
008b150a | 511 | STATIC void * |
416c6d5b | 512 | xfs_vn_follow_link( |
1da177e4 LT |
513 | struct dentry *dentry, |
514 | struct nameidata *nd) | |
515 | { | |
1da177e4 | 516 | char *link; |
804c83c3 | 517 | int error = -ENOMEM; |
1da177e4 | 518 | |
f52720ca | 519 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
520 | if (!link) |
521 | goto out_err; | |
1da177e4 | 522 | |
739bfb2a | 523 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
524 | if (unlikely(error)) |
525 | goto out_kfree; | |
1da177e4 LT |
526 | |
527 | nd_set_link(nd, link); | |
008b150a | 528 | return NULL; |
804c83c3 CH |
529 | |
530 | out_kfree: | |
531 | kfree(link); | |
532 | out_err: | |
533 | nd_set_link(nd, ERR_PTR(error)); | |
534 | return NULL; | |
1da177e4 LT |
535 | } |
536 | ||
cde410a9 | 537 | STATIC void |
416c6d5b | 538 | xfs_vn_put_link( |
cde410a9 NS |
539 | struct dentry *dentry, |
540 | struct nameidata *nd, | |
541 | void *p) | |
1da177e4 | 542 | { |
cde410a9 NS |
543 | char *s = nd_get_link(nd); |
544 | ||
1da177e4 LT |
545 | if (!IS_ERR(s)) |
546 | kfree(s); | |
547 | } | |
548 | ||
549 | #ifdef CONFIG_XFS_POSIX_ACL | |
4576758d CH |
550 | STATIC int |
551 | xfs_check_acl( | |
552 | struct inode *inode, | |
553 | int mask) | |
554 | { | |
555 | struct xfs_inode *ip = XFS_I(inode); | |
556 | int error; | |
557 | ||
558 | xfs_itrace_entry(ip); | |
559 | ||
560 | if (XFS_IFORK_Q(ip)) { | |
561 | error = xfs_acl_iaccess(ip, mask, NULL); | |
562 | if (error != -1) | |
563 | return -error; | |
564 | } | |
565 | ||
566 | return -EAGAIN; | |
567 | } | |
568 | ||
1da177e4 | 569 | STATIC int |
416c6d5b | 570 | xfs_vn_permission( |
4576758d CH |
571 | struct inode *inode, |
572 | int mask, | |
573 | struct nameidata *nd) | |
1da177e4 | 574 | { |
4576758d | 575 | return generic_permission(inode, mask, xfs_check_acl); |
1da177e4 LT |
576 | } |
577 | #else | |
416c6d5b | 578 | #define xfs_vn_permission NULL |
1da177e4 LT |
579 | #endif |
580 | ||
581 | STATIC int | |
416c6d5b | 582 | xfs_vn_getattr( |
c43f4087 CH |
583 | struct vfsmount *mnt, |
584 | struct dentry *dentry, | |
585 | struct kstat *stat) | |
1da177e4 | 586 | { |
c43f4087 CH |
587 | struct inode *inode = dentry->d_inode; |
588 | struct xfs_inode *ip = XFS_I(inode); | |
589 | struct xfs_mount *mp = ip->i_mount; | |
590 | ||
591 | xfs_itrace_entry(ip); | |
592 | ||
593 | if (XFS_FORCED_SHUTDOWN(mp)) | |
594 | return XFS_ERROR(EIO); | |
595 | ||
596 | stat->size = XFS_ISIZE(ip); | |
597 | stat->dev = inode->i_sb->s_dev; | |
598 | stat->mode = ip->i_d.di_mode; | |
599 | stat->nlink = ip->i_d.di_nlink; | |
600 | stat->uid = ip->i_d.di_uid; | |
601 | stat->gid = ip->i_d.di_gid; | |
602 | stat->ino = ip->i_ino; | |
603 | #if XFS_BIG_INUMS | |
604 | stat->ino += mp->m_inoadd; | |
605 | #endif | |
606 | stat->atime = inode->i_atime; | |
607 | stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
608 | stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
609 | stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
610 | stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
611 | stat->blocks = | |
612 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
613 | ||
614 | ||
615 | switch (inode->i_mode & S_IFMT) { | |
616 | case S_IFBLK: | |
617 | case S_IFCHR: | |
618 | stat->blksize = BLKDEV_IOSIZE; | |
619 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
620 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
621 | break; | |
622 | default: | |
71ddabb9 | 623 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
624 | /* |
625 | * If the file blocks are being allocated from a | |
626 | * realtime volume, then return the inode's realtime | |
627 | * extent size or the realtime volume's extent size. | |
628 | */ | |
629 | stat->blksize = | |
630 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
631 | } else | |
632 | stat->blksize = xfs_preferred_iosize(mp); | |
633 | stat->rdev = 0; | |
634 | break; | |
69e23b9a | 635 | } |
c43f4087 CH |
636 | |
637 | return 0; | |
1da177e4 LT |
638 | } |
639 | ||
640 | STATIC int | |
416c6d5b | 641 | xfs_vn_setattr( |
1da177e4 LT |
642 | struct dentry *dentry, |
643 | struct iattr *attr) | |
644 | { | |
645 | struct inode *inode = dentry->d_inode; | |
646 | unsigned int ia_valid = attr->ia_valid; | |
8285fb58 | 647 | bhv_vattr_t vattr = { 0 }; |
1da177e4 LT |
648 | int flags = 0; |
649 | int error; | |
650 | ||
1da177e4 LT |
651 | if (ia_valid & ATTR_UID) { |
652 | vattr.va_mask |= XFS_AT_UID; | |
653 | vattr.va_uid = attr->ia_uid; | |
654 | } | |
655 | if (ia_valid & ATTR_GID) { | |
656 | vattr.va_mask |= XFS_AT_GID; | |
657 | vattr.va_gid = attr->ia_gid; | |
658 | } | |
659 | if (ia_valid & ATTR_SIZE) { | |
660 | vattr.va_mask |= XFS_AT_SIZE; | |
661 | vattr.va_size = attr->ia_size; | |
662 | } | |
663 | if (ia_valid & ATTR_ATIME) { | |
664 | vattr.va_mask |= XFS_AT_ATIME; | |
665 | vattr.va_atime = attr->ia_atime; | |
8c0b5113 | 666 | inode->i_atime = attr->ia_atime; |
1da177e4 LT |
667 | } |
668 | if (ia_valid & ATTR_MTIME) { | |
669 | vattr.va_mask |= XFS_AT_MTIME; | |
670 | vattr.va_mtime = attr->ia_mtime; | |
671 | } | |
672 | if (ia_valid & ATTR_CTIME) { | |
673 | vattr.va_mask |= XFS_AT_CTIME; | |
674 | vattr.va_ctime = attr->ia_ctime; | |
675 | } | |
676 | if (ia_valid & ATTR_MODE) { | |
677 | vattr.va_mask |= XFS_AT_MODE; | |
678 | vattr.va_mode = attr->ia_mode; | |
679 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
680 | inode->i_mode &= ~S_ISGID; | |
681 | } | |
682 | ||
683 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
684 | flags |= ATTR_UTIME; | |
685 | #ifdef ATTR_NO_BLOCK | |
686 | if ((ia_valid & ATTR_NO_BLOCK)) | |
687 | flags |= ATTR_NONBLOCK; | |
688 | #endif | |
689 | ||
739bfb2a | 690 | error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL); |
220b5284 | 691 | if (likely(!error)) |
21a62542 | 692 | vn_revalidate(vn_from_inode(inode)); |
220b5284 | 693 | return -error; |
1da177e4 LT |
694 | } |
695 | ||
696 | STATIC void | |
416c6d5b | 697 | xfs_vn_truncate( |
1da177e4 LT |
698 | struct inode *inode) |
699 | { | |
c2536668 | 700 | block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks); |
1da177e4 LT |
701 | } |
702 | ||
703 | STATIC int | |
416c6d5b | 704 | xfs_vn_setxattr( |
1da177e4 LT |
705 | struct dentry *dentry, |
706 | const char *name, | |
707 | const void *data, | |
708 | size_t size, | |
709 | int flags) | |
710 | { | |
67fcaa73 | 711 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
712 | char *attr = (char *)name; |
713 | attrnames_t *namesp; | |
714 | int xflags = 0; | |
715 | int error; | |
716 | ||
717 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
718 | if (!namesp) | |
719 | return -EOPNOTSUPP; | |
720 | attr += namesp->attr_namelen; | |
721 | error = namesp->attr_capable(vp, NULL); | |
722 | if (error) | |
723 | return error; | |
724 | ||
725 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
726 | if (flags & XATTR_CREATE) | |
727 | xflags |= ATTR_CREATE; | |
728 | if (flags & XATTR_REPLACE) | |
729 | xflags |= ATTR_REPLACE; | |
730 | xflags |= namesp->attr_flag; | |
731 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
732 | } | |
733 | ||
734 | STATIC ssize_t | |
416c6d5b | 735 | xfs_vn_getxattr( |
1da177e4 LT |
736 | struct dentry *dentry, |
737 | const char *name, | |
738 | void *data, | |
739 | size_t size) | |
740 | { | |
67fcaa73 | 741 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
742 | char *attr = (char *)name; |
743 | attrnames_t *namesp; | |
744 | int xflags = 0; | |
745 | ssize_t error; | |
746 | ||
747 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
748 | if (!namesp) | |
749 | return -EOPNOTSUPP; | |
750 | attr += namesp->attr_namelen; | |
751 | error = namesp->attr_capable(vp, NULL); | |
752 | if (error) | |
753 | return error; | |
754 | ||
755 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
756 | if (!size) { | |
757 | xflags |= ATTR_KERNOVAL; | |
758 | data = NULL; | |
759 | } | |
760 | xflags |= namesp->attr_flag; | |
761 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
762 | } | |
763 | ||
764 | STATIC ssize_t | |
416c6d5b | 765 | xfs_vn_listxattr( |
1da177e4 LT |
766 | struct dentry *dentry, |
767 | char *data, | |
768 | size_t size) | |
769 | { | |
67fcaa73 | 770 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
771 | int error, xflags = ATTR_KERNAMELS; |
772 | ssize_t result; | |
773 | ||
774 | if (!size) | |
775 | xflags |= ATTR_KERNOVAL; | |
776 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
777 | ||
778 | error = attr_generic_list(vp, data, size, xflags, &result); | |
779 | if (error < 0) | |
780 | return error; | |
781 | return result; | |
782 | } | |
783 | ||
784 | STATIC int | |
416c6d5b | 785 | xfs_vn_removexattr( |
1da177e4 LT |
786 | struct dentry *dentry, |
787 | const char *name) | |
788 | { | |
67fcaa73 | 789 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
790 | char *attr = (char *)name; |
791 | attrnames_t *namesp; | |
792 | int xflags = 0; | |
793 | int error; | |
794 | ||
795 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
796 | if (!namesp) | |
797 | return -EOPNOTSUPP; | |
798 | attr += namesp->attr_namelen; | |
799 | error = namesp->attr_capable(vp, NULL); | |
800 | if (error) | |
801 | return error; | |
802 | xflags |= namesp->attr_flag; | |
803 | return namesp->attr_remove(vp, attr, xflags); | |
804 | } | |
805 | ||
3ed65264 DC |
806 | STATIC long |
807 | xfs_vn_fallocate( | |
808 | struct inode *inode, | |
809 | int mode, | |
810 | loff_t offset, | |
811 | loff_t len) | |
812 | { | |
813 | long error; | |
814 | loff_t new_size = 0; | |
815 | xfs_flock64_t bf; | |
816 | xfs_inode_t *ip = XFS_I(inode); | |
817 | ||
818 | /* preallocation on directories not yet supported */ | |
819 | error = -ENODEV; | |
820 | if (S_ISDIR(inode->i_mode)) | |
821 | goto out_error; | |
822 | ||
823 | bf.l_whence = 0; | |
824 | bf.l_start = offset; | |
825 | bf.l_len = len; | |
826 | ||
827 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
828 | error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, | |
829 | 0, NULL, ATTR_NOLOCK); | |
830 | if (!error && !(mode & FALLOC_FL_KEEP_SIZE) && | |
831 | offset + len > i_size_read(inode)) | |
832 | new_size = offset + len; | |
833 | ||
834 | /* Change file size if needed */ | |
835 | if (new_size) { | |
836 | bhv_vattr_t va; | |
837 | ||
838 | va.va_mask = XFS_AT_SIZE; | |
839 | va.va_size = new_size; | |
840 | error = xfs_setattr(ip, &va, ATTR_NOLOCK, NULL); | |
841 | } | |
842 | ||
843 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
844 | out_error: | |
845 | return error; | |
846 | } | |
1da177e4 | 847 | |
c5ef1c42 | 848 | const struct inode_operations xfs_inode_operations = { |
416c6d5b NS |
849 | .permission = xfs_vn_permission, |
850 | .truncate = xfs_vn_truncate, | |
851 | .getattr = xfs_vn_getattr, | |
852 | .setattr = xfs_vn_setattr, | |
853 | .setxattr = xfs_vn_setxattr, | |
854 | .getxattr = xfs_vn_getxattr, | |
855 | .listxattr = xfs_vn_listxattr, | |
856 | .removexattr = xfs_vn_removexattr, | |
3ed65264 | 857 | .fallocate = xfs_vn_fallocate, |
1da177e4 LT |
858 | }; |
859 | ||
c5ef1c42 | 860 | const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
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 | ||
c5ef1c42 | 879 | const 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 | }; |