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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; | |
120 | if (!(inode->i_state & I_LOCK)) | |
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; | |
172 | if (!(inode->i_state & I_LOCK)) | |
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( |
220b5284 | 182 | struct inode *ip, |
8285fb58 | 183 | bhv_vattr_t *vattr) |
1da177e4 | 184 | { |
220b5284 | 185 | vattr->va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; |
739bfb2a | 186 | if (!xfs_getattr(XFS_I(ip), vattr, ATTR_LAZY)) { |
220b5284 NS |
187 | ip->i_nlink = vattr->va_nlink; |
188 | ip->i_blocks = vattr->va_nblocks; | |
1da177e4 | 189 | |
220b5284 NS |
190 | /* we're under i_sem so i_size can't change under us */ |
191 | if (i_size_read(ip) != vattr->va_size) | |
192 | i_size_write(ip, vattr->va_size); | |
1da177e4 LT |
193 | } |
194 | } | |
195 | ||
446ada4a NS |
196 | /* |
197 | * Hook in SELinux. This is not quite correct yet, what we really need | |
198 | * here (as we do for default ACLs) is a mechanism by which creation of | |
199 | * these attrs can be journalled at inode creation time (along with the | |
200 | * inode, of course, such that log replay can't cause these to be lost). | |
201 | */ | |
202 | STATIC int | |
416c6d5b | 203 | xfs_init_security( |
67fcaa73 | 204 | bhv_vnode_t *vp, |
446ada4a NS |
205 | struct inode *dir) |
206 | { | |
ec86dc02 | 207 | struct inode *ip = vn_to_inode(vp); |
446ada4a NS |
208 | size_t length; |
209 | void *value; | |
210 | char *name; | |
211 | int error; | |
212 | ||
213 | error = security_inode_init_security(ip, dir, &name, &value, &length); | |
214 | if (error) { | |
215 | if (error == -EOPNOTSUPP) | |
216 | return 0; | |
217 | return -error; | |
218 | } | |
219 | ||
739bfb2a CH |
220 | error = xfs_attr_set(XFS_I(ip), name, value, |
221 | length, ATTR_SECURE); | |
446ada4a | 222 | if (!error) |
b3aea4ed | 223 | xfs_iflags_set(XFS_I(ip), XFS_IMODIFIED); |
446ada4a NS |
224 | |
225 | kfree(name); | |
226 | kfree(value); | |
227 | return error; | |
228 | } | |
229 | ||
1da177e4 LT |
230 | /* |
231 | * Determine whether a process has a valid fs_struct (kernel daemons | |
232 | * like knfsd don't have an fs_struct). | |
233 | * | |
234 | * XXX(hch): nfsd is broken, better fix it instead. | |
235 | */ | |
7989cb8e | 236 | STATIC_INLINE int |
416c6d5b | 237 | xfs_has_fs_struct(struct task_struct *task) |
1da177e4 LT |
238 | { |
239 | return (task->fs != init_task.fs); | |
240 | } | |
241 | ||
7989cb8e | 242 | STATIC void |
416c6d5b | 243 | xfs_cleanup_inode( |
739bfb2a | 244 | struct inode *dir, |
67fcaa73 | 245 | bhv_vnode_t *vp, |
220b5284 | 246 | struct dentry *dentry, |
3a69c7dc YL |
247 | int mode) |
248 | { | |
249 | struct dentry teardown = {}; | |
3a69c7dc YL |
250 | |
251 | /* Oh, the horror. | |
220b5284 | 252 | * If we can't add the ACL or we fail in |
416c6d5b | 253 | * xfs_init_security we must back out. |
3a69c7dc YL |
254 | * ENOSPC can hit here, among other things. |
255 | */ | |
ec86dc02 | 256 | teardown.d_inode = vn_to_inode(vp); |
3a69c7dc YL |
257 | teardown.d_name = dentry->d_name; |
258 | ||
259 | if (S_ISDIR(mode)) | |
739bfb2a | 260 | xfs_rmdir(XFS_I(dir), &teardown); |
3a69c7dc | 261 | else |
739bfb2a | 262 | xfs_remove(XFS_I(dir), &teardown); |
3a69c7dc YL |
263 | VN_RELE(vp); |
264 | } | |
265 | ||
1da177e4 | 266 | STATIC int |
416c6d5b | 267 | xfs_vn_mknod( |
1da177e4 LT |
268 | struct inode *dir, |
269 | struct dentry *dentry, | |
270 | int mode, | |
271 | dev_t rdev) | |
272 | { | |
273 | struct inode *ip; | |
8285fb58 | 274 | bhv_vattr_t vattr = { 0 }; |
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 | ||
524fbf5d NS |
300 | vattr.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
301 | vattr.va_mode = mode; | |
1da177e4 LT |
302 | |
303 | switch (mode & S_IFMT) { | |
304 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
524fbf5d NS |
305 | vattr.va_rdev = sysv_encode_dev(rdev); |
306 | vattr.va_mask |= XFS_AT_RDEV; | |
1da177e4 LT |
307 | /*FALLTHROUGH*/ |
308 | case S_IFREG: | |
739bfb2a | 309 | error = xfs_create(XFS_I(dir), dentry, &vattr, &vp, NULL); |
1da177e4 LT |
310 | break; |
311 | case S_IFDIR: | |
739bfb2a | 312 | error = xfs_mkdir(XFS_I(dir), dentry, &vattr, &vp, NULL); |
1da177e4 LT |
313 | break; |
314 | default: | |
315 | error = EINVAL; | |
316 | break; | |
317 | } | |
318 | ||
220b5284 | 319 | if (unlikely(!error)) { |
416c6d5b | 320 | error = xfs_init_security(vp, dir); |
3a69c7dc | 321 | if (error) |
739bfb2a | 322 | xfs_cleanup_inode(dir, vp, dentry, mode); |
3a69c7dc | 323 | } |
446ada4a | 324 | |
220b5284 | 325 | if (unlikely(default_acl)) { |
1da177e4 | 326 | if (!error) { |
524fbf5d | 327 | error = _ACL_INHERIT(vp, &vattr, default_acl); |
220b5284 | 328 | if (!error) |
0a74cd19 | 329 | xfs_iflags_set(XFS_I(vp), XFS_IMODIFIED); |
3a69c7dc | 330 | else |
739bfb2a | 331 | xfs_cleanup_inode(dir, vp, dentry, mode); |
1da177e4 LT |
332 | } |
333 | _ACL_FREE(default_acl); | |
334 | } | |
335 | ||
220b5284 | 336 | if (likely(!error)) { |
1da177e4 | 337 | ASSERT(vp); |
ec86dc02 | 338 | ip = vn_to_inode(vp); |
1da177e4 LT |
339 | |
340 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
341 | ip->i_rdev = rdev; | |
342 | else if (S_ISDIR(mode)) | |
524fbf5d | 343 | xfs_validate_fields(ip, &vattr); |
1da177e4 | 344 | d_instantiate(dentry, ip); |
524fbf5d | 345 | xfs_validate_fields(dir, &vattr); |
1da177e4 LT |
346 | } |
347 | return -error; | |
348 | } | |
349 | ||
350 | STATIC int | |
416c6d5b | 351 | xfs_vn_create( |
1da177e4 LT |
352 | struct inode *dir, |
353 | struct dentry *dentry, | |
354 | int mode, | |
355 | struct nameidata *nd) | |
356 | { | |
416c6d5b | 357 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
358 | } |
359 | ||
360 | STATIC int | |
416c6d5b | 361 | xfs_vn_mkdir( |
1da177e4 LT |
362 | struct inode *dir, |
363 | struct dentry *dentry, | |
364 | int mode) | |
365 | { | |
416c6d5b | 366 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
367 | } |
368 | ||
369 | STATIC struct dentry * | |
416c6d5b | 370 | xfs_vn_lookup( |
1da177e4 LT |
371 | struct inode *dir, |
372 | struct dentry *dentry, | |
373 | struct nameidata *nd) | |
374 | { | |
739bfb2a | 375 | bhv_vnode_t *cvp; |
1da177e4 LT |
376 | int error; |
377 | ||
378 | if (dentry->d_name.len >= MAXNAMELEN) | |
379 | return ERR_PTR(-ENAMETOOLONG); | |
380 | ||
739bfb2a | 381 | error = xfs_lookup(XFS_I(dir), dentry, &cvp); |
67fcaa73 | 382 | if (unlikely(error)) { |
1da177e4 LT |
383 | if (unlikely(error != ENOENT)) |
384 | return ERR_PTR(-error); | |
385 | d_add(dentry, NULL); | |
386 | return NULL; | |
387 | } | |
388 | ||
ec86dc02 | 389 | return d_splice_alias(vn_to_inode(cvp), dentry); |
1da177e4 LT |
390 | } |
391 | ||
392 | STATIC int | |
416c6d5b | 393 | xfs_vn_link( |
1da177e4 LT |
394 | struct dentry *old_dentry, |
395 | struct inode *dir, | |
396 | struct dentry *dentry) | |
397 | { | |
398 | struct inode *ip; /* inode of guy being linked to */ | |
67fcaa73 | 399 | bhv_vnode_t *vp; /* vp of name being linked */ |
8285fb58 | 400 | bhv_vattr_t vattr; |
1da177e4 LT |
401 | int error; |
402 | ||
403 | ip = old_dentry->d_inode; /* inode being linked to */ | |
ec86dc02 | 404 | vp = vn_from_inode(ip); |
1da177e4 | 405 | |
97dfd70c | 406 | VN_HOLD(vp); |
739bfb2a | 407 | error = xfs_link(XFS_I(dir), vp, dentry); |
97dfd70c NS |
408 | if (unlikely(error)) { |
409 | VN_RELE(vp); | |
410 | } else { | |
b3aea4ed | 411 | xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED); |
524fbf5d | 412 | xfs_validate_fields(ip, &vattr); |
1da177e4 LT |
413 | d_instantiate(dentry, ip); |
414 | } | |
415 | return -error; | |
416 | } | |
417 | ||
418 | STATIC int | |
416c6d5b | 419 | xfs_vn_unlink( |
1da177e4 LT |
420 | struct inode *dir, |
421 | struct dentry *dentry) | |
422 | { | |
423 | struct inode *inode; | |
8285fb58 | 424 | bhv_vattr_t vattr; |
1da177e4 LT |
425 | int error; |
426 | ||
427 | inode = dentry->d_inode; | |
1da177e4 | 428 | |
739bfb2a | 429 | error = xfs_remove(XFS_I(dir), dentry); |
220b5284 | 430 | if (likely(!error)) { |
524fbf5d NS |
431 | xfs_validate_fields(dir, &vattr); /* size needs update */ |
432 | xfs_validate_fields(inode, &vattr); | |
1da177e4 | 433 | } |
1da177e4 LT |
434 | return -error; |
435 | } | |
436 | ||
437 | STATIC int | |
416c6d5b | 438 | xfs_vn_symlink( |
1da177e4 LT |
439 | struct inode *dir, |
440 | struct dentry *dentry, | |
441 | const char *symname) | |
442 | { | |
443 | struct inode *ip; | |
8285fb58 | 444 | bhv_vattr_t va = { 0 }; |
67fcaa73 | 445 | bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */ |
1da177e4 LT |
446 | int error; |
447 | ||
1da177e4 LT |
448 | cvp = NULL; |
449 | ||
67fcaa73 | 450 | va.va_mode = S_IFLNK | |
0432dab2 | 451 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
67fcaa73 | 452 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
1da177e4 | 453 | |
739bfb2a CH |
454 | error = xfs_symlink(XFS_I(dir), dentry, &va, |
455 | (char *)symname, &cvp, NULL); | |
54245702 | 456 | if (likely(!error && cvp)) { |
416c6d5b | 457 | error = xfs_init_security(cvp, dir); |
54245702 | 458 | if (likely(!error)) { |
ec86dc02 | 459 | ip = vn_to_inode(cvp); |
54245702 | 460 | d_instantiate(dentry, ip); |
67fcaa73 NS |
461 | xfs_validate_fields(dir, &va); |
462 | xfs_validate_fields(ip, &va); | |
ce9d37c2 | 463 | } else { |
739bfb2a | 464 | xfs_cleanup_inode(dir, cvp, dentry, 0); |
54245702 | 465 | } |
1da177e4 LT |
466 | } |
467 | return -error; | |
468 | } | |
469 | ||
470 | STATIC int | |
416c6d5b | 471 | xfs_vn_rmdir( |
1da177e4 LT |
472 | struct inode *dir, |
473 | struct dentry *dentry) | |
474 | { | |
475 | struct inode *inode = dentry->d_inode; | |
8285fb58 | 476 | bhv_vattr_t vattr; |
1da177e4 LT |
477 | int error; |
478 | ||
739bfb2a | 479 | error = xfs_rmdir(XFS_I(dir), dentry); |
220b5284 | 480 | if (likely(!error)) { |
524fbf5d NS |
481 | xfs_validate_fields(inode, &vattr); |
482 | xfs_validate_fields(dir, &vattr); | |
1da177e4 LT |
483 | } |
484 | return -error; | |
485 | } | |
486 | ||
487 | STATIC int | |
416c6d5b | 488 | xfs_vn_rename( |
1da177e4 LT |
489 | struct inode *odir, |
490 | struct dentry *odentry, | |
491 | struct inode *ndir, | |
492 | struct dentry *ndentry) | |
493 | { | |
494 | struct inode *new_inode = ndentry->d_inode; | |
67fcaa73 | 495 | bhv_vnode_t *tvp; /* target directory */ |
8285fb58 | 496 | bhv_vattr_t vattr; |
1da177e4 LT |
497 | int error; |
498 | ||
ec86dc02 | 499 | tvp = vn_from_inode(ndir); |
1da177e4 | 500 | |
739bfb2a | 501 | error = xfs_rename(XFS_I(odir), odentry, tvp, ndentry); |
220b5284 NS |
502 | if (likely(!error)) { |
503 | if (new_inode) | |
524fbf5d NS |
504 | xfs_validate_fields(new_inode, &vattr); |
505 | xfs_validate_fields(odir, &vattr); | |
220b5284 | 506 | if (ndir != odir) |
524fbf5d | 507 | xfs_validate_fields(ndir, &vattr); |
220b5284 | 508 | } |
220b5284 | 509 | return -error; |
1da177e4 LT |
510 | } |
511 | ||
512 | /* | |
513 | * careful here - this function can get called recursively, so | |
514 | * we need to be very careful about how much stack we use. | |
515 | * uio is kmalloced for this reason... | |
516 | */ | |
008b150a | 517 | STATIC void * |
416c6d5b | 518 | xfs_vn_follow_link( |
1da177e4 LT |
519 | struct dentry *dentry, |
520 | struct nameidata *nd) | |
521 | { | |
1da177e4 | 522 | char *link; |
804c83c3 | 523 | int error = -ENOMEM; |
1da177e4 | 524 | |
f52720ca | 525 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
526 | if (!link) |
527 | goto out_err; | |
1da177e4 | 528 | |
739bfb2a | 529 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
530 | if (unlikely(error)) |
531 | goto out_kfree; | |
1da177e4 LT |
532 | |
533 | nd_set_link(nd, link); | |
008b150a | 534 | return NULL; |
804c83c3 CH |
535 | |
536 | out_kfree: | |
537 | kfree(link); | |
538 | out_err: | |
539 | nd_set_link(nd, ERR_PTR(error)); | |
540 | return NULL; | |
1da177e4 LT |
541 | } |
542 | ||
cde410a9 | 543 | STATIC void |
416c6d5b | 544 | xfs_vn_put_link( |
cde410a9 NS |
545 | struct dentry *dentry, |
546 | struct nameidata *nd, | |
547 | void *p) | |
1da177e4 | 548 | { |
cde410a9 NS |
549 | char *s = nd_get_link(nd); |
550 | ||
1da177e4 LT |
551 | if (!IS_ERR(s)) |
552 | kfree(s); | |
553 | } | |
554 | ||
555 | #ifdef CONFIG_XFS_POSIX_ACL | |
556 | STATIC int | |
416c6d5b | 557 | xfs_vn_permission( |
1da177e4 LT |
558 | struct inode *inode, |
559 | int mode, | |
560 | struct nameidata *nd) | |
561 | { | |
739bfb2a | 562 | return -xfs_access(XFS_I(inode), mode << 6, NULL); |
1da177e4 LT |
563 | } |
564 | #else | |
416c6d5b | 565 | #define xfs_vn_permission NULL |
1da177e4 LT |
566 | #endif |
567 | ||
568 | STATIC int | |
416c6d5b | 569 | xfs_vn_getattr( |
1da177e4 LT |
570 | struct vfsmount *mnt, |
571 | struct dentry *dentry, | |
572 | struct kstat *stat) | |
573 | { | |
574 | struct inode *inode = dentry->d_inode; | |
69e23b9a NS |
575 | bhv_vattr_t vattr = { .va_mask = XFS_AT_STAT }; |
576 | int error; | |
1da177e4 | 577 | |
739bfb2a | 578 | error = xfs_getattr(XFS_I(inode), &vattr, ATTR_LAZY); |
69e23b9a NS |
579 | if (likely(!error)) { |
580 | stat->size = i_size_read(inode); | |
581 | stat->dev = inode->i_sb->s_dev; | |
582 | stat->rdev = (vattr.va_rdev == 0) ? 0 : | |
583 | MKDEV(sysv_major(vattr.va_rdev) & 0x1ff, | |
584 | sysv_minor(vattr.va_rdev)); | |
585 | stat->mode = vattr.va_mode; | |
586 | stat->nlink = vattr.va_nlink; | |
587 | stat->uid = vattr.va_uid; | |
588 | stat->gid = vattr.va_gid; | |
589 | stat->ino = vattr.va_nodeid; | |
590 | stat->atime = vattr.va_atime; | |
591 | stat->mtime = vattr.va_mtime; | |
592 | stat->ctime = vattr.va_ctime; | |
593 | stat->blocks = vattr.va_nblocks; | |
594 | stat->blksize = vattr.va_blocksize; | |
595 | } | |
b76963fa | 596 | return -error; |
1da177e4 LT |
597 | } |
598 | ||
599 | STATIC int | |
416c6d5b | 600 | xfs_vn_setattr( |
1da177e4 LT |
601 | struct dentry *dentry, |
602 | struct iattr *attr) | |
603 | { | |
604 | struct inode *inode = dentry->d_inode; | |
605 | unsigned int ia_valid = attr->ia_valid; | |
8285fb58 | 606 | bhv_vattr_t vattr = { 0 }; |
1da177e4 LT |
607 | int flags = 0; |
608 | int error; | |
609 | ||
1da177e4 LT |
610 | if (ia_valid & ATTR_UID) { |
611 | vattr.va_mask |= XFS_AT_UID; | |
612 | vattr.va_uid = attr->ia_uid; | |
613 | } | |
614 | if (ia_valid & ATTR_GID) { | |
615 | vattr.va_mask |= XFS_AT_GID; | |
616 | vattr.va_gid = attr->ia_gid; | |
617 | } | |
618 | if (ia_valid & ATTR_SIZE) { | |
619 | vattr.va_mask |= XFS_AT_SIZE; | |
620 | vattr.va_size = attr->ia_size; | |
621 | } | |
622 | if (ia_valid & ATTR_ATIME) { | |
623 | vattr.va_mask |= XFS_AT_ATIME; | |
624 | vattr.va_atime = attr->ia_atime; | |
8c0b5113 | 625 | inode->i_atime = attr->ia_atime; |
1da177e4 LT |
626 | } |
627 | if (ia_valid & ATTR_MTIME) { | |
628 | vattr.va_mask |= XFS_AT_MTIME; | |
629 | vattr.va_mtime = attr->ia_mtime; | |
630 | } | |
631 | if (ia_valid & ATTR_CTIME) { | |
632 | vattr.va_mask |= XFS_AT_CTIME; | |
633 | vattr.va_ctime = attr->ia_ctime; | |
634 | } | |
635 | if (ia_valid & ATTR_MODE) { | |
636 | vattr.va_mask |= XFS_AT_MODE; | |
637 | vattr.va_mode = attr->ia_mode; | |
638 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
639 | inode->i_mode &= ~S_ISGID; | |
640 | } | |
641 | ||
642 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
643 | flags |= ATTR_UTIME; | |
644 | #ifdef ATTR_NO_BLOCK | |
645 | if ((ia_valid & ATTR_NO_BLOCK)) | |
646 | flags |= ATTR_NONBLOCK; | |
647 | #endif | |
648 | ||
739bfb2a | 649 | error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL); |
220b5284 | 650 | if (likely(!error)) |
739bfb2a | 651 | __vn_revalidate(vn_from_inode(inode), &vattr); |
220b5284 | 652 | return -error; |
1da177e4 LT |
653 | } |
654 | ||
655 | STATIC void | |
416c6d5b | 656 | xfs_vn_truncate( |
1da177e4 LT |
657 | struct inode *inode) |
658 | { | |
c2536668 | 659 | block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks); |
1da177e4 LT |
660 | } |
661 | ||
662 | STATIC int | |
416c6d5b | 663 | xfs_vn_setxattr( |
1da177e4 LT |
664 | struct dentry *dentry, |
665 | const char *name, | |
666 | const void *data, | |
667 | size_t size, | |
668 | int flags) | |
669 | { | |
67fcaa73 | 670 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
671 | char *attr = (char *)name; |
672 | attrnames_t *namesp; | |
673 | int xflags = 0; | |
674 | int error; | |
675 | ||
676 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
677 | if (!namesp) | |
678 | return -EOPNOTSUPP; | |
679 | attr += namesp->attr_namelen; | |
680 | error = namesp->attr_capable(vp, NULL); | |
681 | if (error) | |
682 | return error; | |
683 | ||
684 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
685 | if (flags & XATTR_CREATE) | |
686 | xflags |= ATTR_CREATE; | |
687 | if (flags & XATTR_REPLACE) | |
688 | xflags |= ATTR_REPLACE; | |
689 | xflags |= namesp->attr_flag; | |
690 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
691 | } | |
692 | ||
693 | STATIC ssize_t | |
416c6d5b | 694 | xfs_vn_getxattr( |
1da177e4 LT |
695 | struct dentry *dentry, |
696 | const char *name, | |
697 | void *data, | |
698 | size_t size) | |
699 | { | |
67fcaa73 | 700 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
701 | char *attr = (char *)name; |
702 | attrnames_t *namesp; | |
703 | int xflags = 0; | |
704 | ssize_t error; | |
705 | ||
706 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
707 | if (!namesp) | |
708 | return -EOPNOTSUPP; | |
709 | attr += namesp->attr_namelen; | |
710 | error = namesp->attr_capable(vp, NULL); | |
711 | if (error) | |
712 | return error; | |
713 | ||
714 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
715 | if (!size) { | |
716 | xflags |= ATTR_KERNOVAL; | |
717 | data = NULL; | |
718 | } | |
719 | xflags |= namesp->attr_flag; | |
720 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
721 | } | |
722 | ||
723 | STATIC ssize_t | |
416c6d5b | 724 | xfs_vn_listxattr( |
1da177e4 LT |
725 | struct dentry *dentry, |
726 | char *data, | |
727 | size_t size) | |
728 | { | |
67fcaa73 | 729 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
730 | int error, xflags = ATTR_KERNAMELS; |
731 | ssize_t result; | |
732 | ||
733 | if (!size) | |
734 | xflags |= ATTR_KERNOVAL; | |
735 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
736 | ||
737 | error = attr_generic_list(vp, data, size, xflags, &result); | |
738 | if (error < 0) | |
739 | return error; | |
740 | return result; | |
741 | } | |
742 | ||
743 | STATIC int | |
416c6d5b | 744 | xfs_vn_removexattr( |
1da177e4 LT |
745 | struct dentry *dentry, |
746 | const char *name) | |
747 | { | |
67fcaa73 | 748 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
749 | char *attr = (char *)name; |
750 | attrnames_t *namesp; | |
751 | int xflags = 0; | |
752 | int error; | |
753 | ||
754 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
755 | if (!namesp) | |
756 | return -EOPNOTSUPP; | |
757 | attr += namesp->attr_namelen; | |
758 | error = namesp->attr_capable(vp, NULL); | |
759 | if (error) | |
760 | return error; | |
761 | xflags |= namesp->attr_flag; | |
762 | return namesp->attr_remove(vp, attr, xflags); | |
763 | } | |
764 | ||
765 | ||
c5ef1c42 | 766 | const struct inode_operations xfs_inode_operations = { |
416c6d5b NS |
767 | .permission = xfs_vn_permission, |
768 | .truncate = xfs_vn_truncate, | |
769 | .getattr = xfs_vn_getattr, | |
770 | .setattr = xfs_vn_setattr, | |
771 | .setxattr = xfs_vn_setxattr, | |
772 | .getxattr = xfs_vn_getxattr, | |
773 | .listxattr = xfs_vn_listxattr, | |
774 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
775 | }; |
776 | ||
c5ef1c42 | 777 | const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
778 | .create = xfs_vn_create, |
779 | .lookup = xfs_vn_lookup, | |
780 | .link = xfs_vn_link, | |
781 | .unlink = xfs_vn_unlink, | |
782 | .symlink = xfs_vn_symlink, | |
783 | .mkdir = xfs_vn_mkdir, | |
784 | .rmdir = xfs_vn_rmdir, | |
785 | .mknod = xfs_vn_mknod, | |
786 | .rename = xfs_vn_rename, | |
787 | .permission = xfs_vn_permission, | |
788 | .getattr = xfs_vn_getattr, | |
789 | .setattr = xfs_vn_setattr, | |
790 | .setxattr = xfs_vn_setxattr, | |
791 | .getxattr = xfs_vn_getxattr, | |
792 | .listxattr = xfs_vn_listxattr, | |
793 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
794 | }; |
795 | ||
c5ef1c42 | 796 | const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 797 | .readlink = generic_readlink, |
416c6d5b NS |
798 | .follow_link = xfs_vn_follow_link, |
799 | .put_link = xfs_vn_put_link, | |
800 | .permission = xfs_vn_permission, | |
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 | 807 | }; |