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) { | |
68 | struct inode *inode = &vp->v_inode; | |
69 | ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; | |
70 | ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; | |
71 | } | |
72 | } | |
73 | ||
4aeb664c NS |
74 | /* |
75 | * Change the requested timestamp in the given inode. | |
76 | * We don't lock across timestamp updates, and we don't log them but | |
77 | * we do record the fact that there is dirty information in core. | |
78 | * | |
79 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
80 | * with XFS_ICHGTIME_ACC to be sure that access time | |
81 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
82 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
83 | * timestamp if the filesystem is mounted noacctm. | |
84 | */ | |
85 | void | |
86 | xfs_ichgtime( | |
87 | xfs_inode_t *ip, | |
88 | int flags) | |
89 | { | |
ec86dc02 | 90 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
4aeb664c NS |
91 | timespec_t tv; |
92 | ||
4aeb664c NS |
93 | nanotime(&tv); |
94 | if (flags & XFS_ICHGTIME_MOD) { | |
95 | inode->i_mtime = tv; | |
96 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
97 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
98 | } | |
99 | if (flags & XFS_ICHGTIME_ACC) { | |
100 | inode->i_atime = tv; | |
101 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
102 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
103 | } | |
104 | if (flags & XFS_ICHGTIME_CHG) { | |
105 | inode->i_ctime = tv; | |
106 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
107 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
108 | } | |
109 | ||
110 | /* | |
111 | * We update the i_update_core field _after_ changing | |
112 | * the timestamps in order to coordinate properly with | |
113 | * xfs_iflush() so that we don't lose timestamp updates. | |
114 | * This keeps us from having to hold the inode lock | |
115 | * while doing this. We use the SYNCHRONIZE macro to | |
116 | * ensure that the compiler does not reorder the update | |
117 | * of i_update_core above the timestamp updates above. | |
118 | */ | |
119 | SYNCHRONIZE(); | |
120 | ip->i_update_core = 1; | |
121 | if (!(inode->i_state & I_LOCK)) | |
122 | mark_inode_dirty_sync(inode); | |
123 | } | |
124 | ||
125 | /* | |
126 | * Variant on the above which avoids querying the system clock | |
127 | * in situations where we know the Linux inode timestamps have | |
128 | * just been updated (and so we can update our inode cheaply). | |
4aeb664c NS |
129 | */ |
130 | void | |
131 | xfs_ichgtime_fast( | |
132 | xfs_inode_t *ip, | |
133 | struct inode *inode, | |
134 | int flags) | |
135 | { | |
136 | timespec_t *tvp; | |
137 | ||
138 | /* | |
42fe2b1f CH |
139 | * Atime updates for read() & friends are handled lazily now, and |
140 | * explicit updates must go through xfs_ichgtime() | |
4aeb664c | 141 | */ |
42fe2b1f | 142 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
4aeb664c NS |
143 | |
144 | /* | |
42fe2b1f CH |
145 | * We're not supposed to change timestamps in readonly-mounted |
146 | * filesystems. Throw it away if anyone asks us. | |
4aeb664c | 147 | */ |
42fe2b1f | 148 | if (unlikely(IS_RDONLY(inode))) |
4aeb664c NS |
149 | return; |
150 | ||
151 | if (flags & XFS_ICHGTIME_MOD) { | |
152 | tvp = &inode->i_mtime; | |
153 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
154 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
155 | } | |
4aeb664c NS |
156 | if (flags & XFS_ICHGTIME_CHG) { |
157 | tvp = &inode->i_ctime; | |
158 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
159 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
160 | } | |
161 | ||
162 | /* | |
163 | * We update the i_update_core field _after_ changing | |
164 | * the timestamps in order to coordinate properly with | |
165 | * xfs_iflush() so that we don't lose timestamp updates. | |
166 | * This keeps us from having to hold the inode lock | |
167 | * while doing this. We use the SYNCHRONIZE macro to | |
168 | * ensure that the compiler does not reorder the update | |
169 | * of i_update_core above the timestamp updates above. | |
170 | */ | |
171 | SYNCHRONIZE(); | |
172 | ip->i_update_core = 1; | |
173 | if (!(inode->i_state & I_LOCK)) | |
174 | mark_inode_dirty_sync(inode); | |
175 | } | |
176 | ||
1da177e4 LT |
177 | |
178 | /* | |
179 | * Pull the link count and size up from the xfs inode to the linux inode | |
180 | */ | |
181 | STATIC void | |
416c6d5b | 182 | xfs_validate_fields( |
220b5284 | 183 | struct inode *ip, |
8285fb58 | 184 | bhv_vattr_t *vattr) |
1da177e4 | 185 | { |
220b5284 | 186 | vattr->va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; |
739bfb2a | 187 | if (!xfs_getattr(XFS_I(ip), vattr, ATTR_LAZY)) { |
220b5284 NS |
188 | ip->i_nlink = vattr->va_nlink; |
189 | ip->i_blocks = vattr->va_nblocks; | |
1da177e4 | 190 | |
220b5284 NS |
191 | /* we're under i_sem so i_size can't change under us */ |
192 | if (i_size_read(ip) != vattr->va_size) | |
193 | i_size_write(ip, vattr->va_size); | |
1da177e4 LT |
194 | } |
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; | |
8285fb58 | 275 | bhv_vattr_t vattr = { 0 }; |
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 | ||
220b5284 NS |
288 | if (unlikely(test_default_acl && test_default_acl(dvp))) { |
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 | ||
416c6d5b | 298 | if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current)) |
1da177e4 LT |
299 | mode &= ~current->fs->umask; |
300 | ||
524fbf5d NS |
301 | vattr.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
302 | vattr.va_mode = mode; | |
1da177e4 LT |
303 | |
304 | switch (mode & S_IFMT) { | |
305 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
524fbf5d NS |
306 | vattr.va_rdev = sysv_encode_dev(rdev); |
307 | vattr.va_mask |= XFS_AT_RDEV; | |
1da177e4 LT |
308 | /*FALLTHROUGH*/ |
309 | case S_IFREG: | |
739bfb2a | 310 | error = xfs_create(XFS_I(dir), dentry, &vattr, &vp, NULL); |
1da177e4 LT |
311 | break; |
312 | case S_IFDIR: | |
739bfb2a | 313 | error = xfs_mkdir(XFS_I(dir), dentry, &vattr, &vp, NULL); |
1da177e4 LT |
314 | break; |
315 | default: | |
316 | error = EINVAL; | |
317 | break; | |
318 | } | |
319 | ||
220b5284 | 320 | if (unlikely(!error)) { |
416c6d5b | 321 | error = xfs_init_security(vp, dir); |
3a69c7dc | 322 | if (error) |
739bfb2a | 323 | xfs_cleanup_inode(dir, vp, dentry, mode); |
3a69c7dc | 324 | } |
446ada4a | 325 | |
220b5284 | 326 | if (unlikely(default_acl)) { |
1da177e4 | 327 | if (!error) { |
524fbf5d | 328 | error = _ACL_INHERIT(vp, &vattr, default_acl); |
220b5284 | 329 | if (!error) |
b3aea4ed | 330 | xfs_iflags_set(XFS_I(&vp->v_inode), XFS_IMODIFIED); |
3a69c7dc | 331 | else |
739bfb2a | 332 | xfs_cleanup_inode(dir, vp, dentry, mode); |
1da177e4 LT |
333 | } |
334 | _ACL_FREE(default_acl); | |
335 | } | |
336 | ||
220b5284 | 337 | if (likely(!error)) { |
1da177e4 | 338 | ASSERT(vp); |
ec86dc02 | 339 | ip = vn_to_inode(vp); |
1da177e4 LT |
340 | |
341 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
342 | ip->i_rdev = rdev; | |
343 | else if (S_ISDIR(mode)) | |
524fbf5d | 344 | xfs_validate_fields(ip, &vattr); |
1da177e4 | 345 | d_instantiate(dentry, ip); |
524fbf5d | 346 | xfs_validate_fields(dir, &vattr); |
1da177e4 LT |
347 | } |
348 | return -error; | |
349 | } | |
350 | ||
351 | STATIC int | |
416c6d5b | 352 | xfs_vn_create( |
1da177e4 LT |
353 | struct inode *dir, |
354 | struct dentry *dentry, | |
355 | int mode, | |
356 | struct nameidata *nd) | |
357 | { | |
416c6d5b | 358 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
359 | } |
360 | ||
361 | STATIC int | |
416c6d5b | 362 | xfs_vn_mkdir( |
1da177e4 LT |
363 | struct inode *dir, |
364 | struct dentry *dentry, | |
365 | int mode) | |
366 | { | |
416c6d5b | 367 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
368 | } |
369 | ||
370 | STATIC struct dentry * | |
416c6d5b | 371 | xfs_vn_lookup( |
1da177e4 LT |
372 | struct inode *dir, |
373 | struct dentry *dentry, | |
374 | struct nameidata *nd) | |
375 | { | |
739bfb2a | 376 | bhv_vnode_t *cvp; |
1da177e4 LT |
377 | int error; |
378 | ||
379 | if (dentry->d_name.len >= MAXNAMELEN) | |
380 | return ERR_PTR(-ENAMETOOLONG); | |
381 | ||
739bfb2a | 382 | error = xfs_lookup(XFS_I(dir), dentry, &cvp); |
67fcaa73 | 383 | if (unlikely(error)) { |
1da177e4 LT |
384 | if (unlikely(error != ENOENT)) |
385 | return ERR_PTR(-error); | |
386 | d_add(dentry, NULL); | |
387 | return NULL; | |
388 | } | |
389 | ||
ec86dc02 | 390 | return d_splice_alias(vn_to_inode(cvp), dentry); |
1da177e4 LT |
391 | } |
392 | ||
393 | STATIC int | |
416c6d5b | 394 | xfs_vn_link( |
1da177e4 LT |
395 | struct dentry *old_dentry, |
396 | struct inode *dir, | |
397 | struct dentry *dentry) | |
398 | { | |
399 | struct inode *ip; /* inode of guy being linked to */ | |
67fcaa73 | 400 | bhv_vnode_t *vp; /* vp of name being linked */ |
8285fb58 | 401 | bhv_vattr_t vattr; |
1da177e4 LT |
402 | int error; |
403 | ||
404 | ip = old_dentry->d_inode; /* inode being linked to */ | |
ec86dc02 | 405 | vp = vn_from_inode(ip); |
1da177e4 | 406 | |
97dfd70c | 407 | VN_HOLD(vp); |
739bfb2a | 408 | error = xfs_link(XFS_I(dir), vp, dentry); |
97dfd70c NS |
409 | if (unlikely(error)) { |
410 | VN_RELE(vp); | |
411 | } else { | |
b3aea4ed | 412 | xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED); |
524fbf5d | 413 | xfs_validate_fields(ip, &vattr); |
1da177e4 LT |
414 | d_instantiate(dentry, ip); |
415 | } | |
416 | return -error; | |
417 | } | |
418 | ||
419 | STATIC int | |
416c6d5b | 420 | xfs_vn_unlink( |
1da177e4 LT |
421 | struct inode *dir, |
422 | struct dentry *dentry) | |
423 | { | |
424 | struct inode *inode; | |
8285fb58 | 425 | bhv_vattr_t vattr; |
1da177e4 LT |
426 | int error; |
427 | ||
428 | inode = dentry->d_inode; | |
1da177e4 | 429 | |
739bfb2a | 430 | error = xfs_remove(XFS_I(dir), dentry); |
220b5284 | 431 | if (likely(!error)) { |
524fbf5d NS |
432 | xfs_validate_fields(dir, &vattr); /* size needs update */ |
433 | xfs_validate_fields(inode, &vattr); | |
1da177e4 | 434 | } |
1da177e4 LT |
435 | return -error; |
436 | } | |
437 | ||
438 | STATIC int | |
416c6d5b | 439 | xfs_vn_symlink( |
1da177e4 LT |
440 | struct inode *dir, |
441 | struct dentry *dentry, | |
442 | const char *symname) | |
443 | { | |
444 | struct inode *ip; | |
8285fb58 | 445 | bhv_vattr_t va = { 0 }; |
67fcaa73 | 446 | bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */ |
1da177e4 LT |
447 | int error; |
448 | ||
1da177e4 LT |
449 | cvp = NULL; |
450 | ||
67fcaa73 | 451 | va.va_mode = S_IFLNK | |
0432dab2 | 452 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
67fcaa73 | 453 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
1da177e4 | 454 | |
739bfb2a CH |
455 | error = xfs_symlink(XFS_I(dir), dentry, &va, |
456 | (char *)symname, &cvp, NULL); | |
54245702 | 457 | if (likely(!error && cvp)) { |
416c6d5b | 458 | error = xfs_init_security(cvp, dir); |
54245702 | 459 | if (likely(!error)) { |
ec86dc02 | 460 | ip = vn_to_inode(cvp); |
54245702 | 461 | d_instantiate(dentry, ip); |
67fcaa73 NS |
462 | xfs_validate_fields(dir, &va); |
463 | xfs_validate_fields(ip, &va); | |
ce9d37c2 | 464 | } else { |
739bfb2a | 465 | xfs_cleanup_inode(dir, cvp, dentry, 0); |
54245702 | 466 | } |
1da177e4 LT |
467 | } |
468 | return -error; | |
469 | } | |
470 | ||
471 | STATIC int | |
416c6d5b | 472 | xfs_vn_rmdir( |
1da177e4 LT |
473 | struct inode *dir, |
474 | struct dentry *dentry) | |
475 | { | |
476 | struct inode *inode = dentry->d_inode; | |
8285fb58 | 477 | bhv_vattr_t vattr; |
1da177e4 LT |
478 | int error; |
479 | ||
739bfb2a | 480 | error = xfs_rmdir(XFS_I(dir), dentry); |
220b5284 | 481 | if (likely(!error)) { |
524fbf5d NS |
482 | xfs_validate_fields(inode, &vattr); |
483 | xfs_validate_fields(dir, &vattr); | |
1da177e4 LT |
484 | } |
485 | return -error; | |
486 | } | |
487 | ||
488 | STATIC int | |
416c6d5b | 489 | xfs_vn_rename( |
1da177e4 LT |
490 | struct inode *odir, |
491 | struct dentry *odentry, | |
492 | struct inode *ndir, | |
493 | struct dentry *ndentry) | |
494 | { | |
495 | struct inode *new_inode = ndentry->d_inode; | |
67fcaa73 | 496 | bhv_vnode_t *tvp; /* target directory */ |
8285fb58 | 497 | bhv_vattr_t vattr; |
1da177e4 LT |
498 | int error; |
499 | ||
ec86dc02 | 500 | tvp = vn_from_inode(ndir); |
1da177e4 | 501 | |
739bfb2a | 502 | error = xfs_rename(XFS_I(odir), odentry, tvp, ndentry); |
220b5284 NS |
503 | if (likely(!error)) { |
504 | if (new_inode) | |
524fbf5d NS |
505 | xfs_validate_fields(new_inode, &vattr); |
506 | xfs_validate_fields(odir, &vattr); | |
220b5284 | 507 | if (ndir != odir) |
524fbf5d | 508 | xfs_validate_fields(ndir, &vattr); |
220b5284 | 509 | } |
220b5284 | 510 | return -error; |
1da177e4 LT |
511 | } |
512 | ||
513 | /* | |
514 | * careful here - this function can get called recursively, so | |
515 | * we need to be very careful about how much stack we use. | |
516 | * uio is kmalloced for this reason... | |
517 | */ | |
008b150a | 518 | STATIC void * |
416c6d5b | 519 | xfs_vn_follow_link( |
1da177e4 LT |
520 | struct dentry *dentry, |
521 | struct nameidata *nd) | |
522 | { | |
1da177e4 | 523 | char *link; |
804c83c3 | 524 | int error = -ENOMEM; |
1da177e4 | 525 | |
f52720ca | 526 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
527 | if (!link) |
528 | goto out_err; | |
1da177e4 | 529 | |
739bfb2a | 530 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
531 | if (unlikely(error)) |
532 | goto out_kfree; | |
1da177e4 LT |
533 | |
534 | nd_set_link(nd, link); | |
008b150a | 535 | return NULL; |
804c83c3 CH |
536 | |
537 | out_kfree: | |
538 | kfree(link); | |
539 | out_err: | |
540 | nd_set_link(nd, ERR_PTR(error)); | |
541 | return NULL; | |
1da177e4 LT |
542 | } |
543 | ||
cde410a9 | 544 | STATIC void |
416c6d5b | 545 | xfs_vn_put_link( |
cde410a9 NS |
546 | struct dentry *dentry, |
547 | struct nameidata *nd, | |
548 | void *p) | |
1da177e4 | 549 | { |
cde410a9 NS |
550 | char *s = nd_get_link(nd); |
551 | ||
1da177e4 LT |
552 | if (!IS_ERR(s)) |
553 | kfree(s); | |
554 | } | |
555 | ||
556 | #ifdef CONFIG_XFS_POSIX_ACL | |
557 | STATIC int | |
416c6d5b | 558 | xfs_vn_permission( |
1da177e4 LT |
559 | struct inode *inode, |
560 | int mode, | |
561 | struct nameidata *nd) | |
562 | { | |
739bfb2a | 563 | return -xfs_access(XFS_I(inode), mode << 6, NULL); |
1da177e4 LT |
564 | } |
565 | #else | |
416c6d5b | 566 | #define xfs_vn_permission NULL |
1da177e4 LT |
567 | #endif |
568 | ||
569 | STATIC int | |
416c6d5b | 570 | xfs_vn_getattr( |
1da177e4 LT |
571 | struct vfsmount *mnt, |
572 | struct dentry *dentry, | |
573 | struct kstat *stat) | |
574 | { | |
575 | struct inode *inode = dentry->d_inode; | |
69e23b9a NS |
576 | bhv_vattr_t vattr = { .va_mask = XFS_AT_STAT }; |
577 | int error; | |
1da177e4 | 578 | |
739bfb2a | 579 | error = xfs_getattr(XFS_I(inode), &vattr, ATTR_LAZY); |
69e23b9a NS |
580 | if (likely(!error)) { |
581 | stat->size = i_size_read(inode); | |
582 | stat->dev = inode->i_sb->s_dev; | |
583 | stat->rdev = (vattr.va_rdev == 0) ? 0 : | |
584 | MKDEV(sysv_major(vattr.va_rdev) & 0x1ff, | |
585 | sysv_minor(vattr.va_rdev)); | |
586 | stat->mode = vattr.va_mode; | |
587 | stat->nlink = vattr.va_nlink; | |
588 | stat->uid = vattr.va_uid; | |
589 | stat->gid = vattr.va_gid; | |
590 | stat->ino = vattr.va_nodeid; | |
591 | stat->atime = vattr.va_atime; | |
592 | stat->mtime = vattr.va_mtime; | |
593 | stat->ctime = vattr.va_ctime; | |
594 | stat->blocks = vattr.va_nblocks; | |
595 | stat->blksize = vattr.va_blocksize; | |
596 | } | |
b76963fa | 597 | return -error; |
1da177e4 LT |
598 | } |
599 | ||
600 | STATIC int | |
416c6d5b | 601 | xfs_vn_setattr( |
1da177e4 LT |
602 | struct dentry *dentry, |
603 | struct iattr *attr) | |
604 | { | |
605 | struct inode *inode = dentry->d_inode; | |
606 | unsigned int ia_valid = attr->ia_valid; | |
8285fb58 | 607 | bhv_vattr_t vattr = { 0 }; |
1da177e4 LT |
608 | int flags = 0; |
609 | int error; | |
610 | ||
1da177e4 LT |
611 | if (ia_valid & ATTR_UID) { |
612 | vattr.va_mask |= XFS_AT_UID; | |
613 | vattr.va_uid = attr->ia_uid; | |
614 | } | |
615 | if (ia_valid & ATTR_GID) { | |
616 | vattr.va_mask |= XFS_AT_GID; | |
617 | vattr.va_gid = attr->ia_gid; | |
618 | } | |
619 | if (ia_valid & ATTR_SIZE) { | |
620 | vattr.va_mask |= XFS_AT_SIZE; | |
621 | vattr.va_size = attr->ia_size; | |
622 | } | |
623 | if (ia_valid & ATTR_ATIME) { | |
624 | vattr.va_mask |= XFS_AT_ATIME; | |
625 | vattr.va_atime = attr->ia_atime; | |
8c0b5113 | 626 | inode->i_atime = attr->ia_atime; |
1da177e4 LT |
627 | } |
628 | if (ia_valid & ATTR_MTIME) { | |
629 | vattr.va_mask |= XFS_AT_MTIME; | |
630 | vattr.va_mtime = attr->ia_mtime; | |
631 | } | |
632 | if (ia_valid & ATTR_CTIME) { | |
633 | vattr.va_mask |= XFS_AT_CTIME; | |
634 | vattr.va_ctime = attr->ia_ctime; | |
635 | } | |
636 | if (ia_valid & ATTR_MODE) { | |
637 | vattr.va_mask |= XFS_AT_MODE; | |
638 | vattr.va_mode = attr->ia_mode; | |
639 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
640 | inode->i_mode &= ~S_ISGID; | |
641 | } | |
642 | ||
643 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
644 | flags |= ATTR_UTIME; | |
645 | #ifdef ATTR_NO_BLOCK | |
646 | if ((ia_valid & ATTR_NO_BLOCK)) | |
647 | flags |= ATTR_NONBLOCK; | |
648 | #endif | |
649 | ||
739bfb2a | 650 | error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL); |
220b5284 | 651 | if (likely(!error)) |
739bfb2a | 652 | __vn_revalidate(vn_from_inode(inode), &vattr); |
220b5284 | 653 | return -error; |
1da177e4 LT |
654 | } |
655 | ||
656 | STATIC void | |
416c6d5b | 657 | xfs_vn_truncate( |
1da177e4 LT |
658 | struct inode *inode) |
659 | { | |
c2536668 | 660 | block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks); |
1da177e4 LT |
661 | } |
662 | ||
663 | STATIC int | |
416c6d5b | 664 | xfs_vn_setxattr( |
1da177e4 LT |
665 | struct dentry *dentry, |
666 | const char *name, | |
667 | const void *data, | |
668 | size_t size, | |
669 | int flags) | |
670 | { | |
67fcaa73 | 671 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
672 | char *attr = (char *)name; |
673 | attrnames_t *namesp; | |
674 | int xflags = 0; | |
675 | int error; | |
676 | ||
677 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
678 | if (!namesp) | |
679 | return -EOPNOTSUPP; | |
680 | attr += namesp->attr_namelen; | |
681 | error = namesp->attr_capable(vp, NULL); | |
682 | if (error) | |
683 | return error; | |
684 | ||
685 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
686 | if (flags & XATTR_CREATE) | |
687 | xflags |= ATTR_CREATE; | |
688 | if (flags & XATTR_REPLACE) | |
689 | xflags |= ATTR_REPLACE; | |
690 | xflags |= namesp->attr_flag; | |
691 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
692 | } | |
693 | ||
694 | STATIC ssize_t | |
416c6d5b | 695 | xfs_vn_getxattr( |
1da177e4 LT |
696 | struct dentry *dentry, |
697 | const char *name, | |
698 | void *data, | |
699 | size_t size) | |
700 | { | |
67fcaa73 | 701 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
702 | char *attr = (char *)name; |
703 | attrnames_t *namesp; | |
704 | int xflags = 0; | |
705 | ssize_t error; | |
706 | ||
707 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
708 | if (!namesp) | |
709 | return -EOPNOTSUPP; | |
710 | attr += namesp->attr_namelen; | |
711 | error = namesp->attr_capable(vp, NULL); | |
712 | if (error) | |
713 | return error; | |
714 | ||
715 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
716 | if (!size) { | |
717 | xflags |= ATTR_KERNOVAL; | |
718 | data = NULL; | |
719 | } | |
720 | xflags |= namesp->attr_flag; | |
721 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
722 | } | |
723 | ||
724 | STATIC ssize_t | |
416c6d5b | 725 | xfs_vn_listxattr( |
1da177e4 LT |
726 | struct dentry *dentry, |
727 | char *data, | |
728 | size_t size) | |
729 | { | |
67fcaa73 | 730 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
731 | int error, xflags = ATTR_KERNAMELS; |
732 | ssize_t result; | |
733 | ||
734 | if (!size) | |
735 | xflags |= ATTR_KERNOVAL; | |
736 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
737 | ||
738 | error = attr_generic_list(vp, data, size, xflags, &result); | |
739 | if (error < 0) | |
740 | return error; | |
741 | return result; | |
742 | } | |
743 | ||
744 | STATIC int | |
416c6d5b | 745 | xfs_vn_removexattr( |
1da177e4 LT |
746 | struct dentry *dentry, |
747 | const char *name) | |
748 | { | |
67fcaa73 | 749 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
750 | char *attr = (char *)name; |
751 | attrnames_t *namesp; | |
752 | int xflags = 0; | |
753 | int error; | |
754 | ||
755 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
756 | if (!namesp) | |
757 | return -EOPNOTSUPP; | |
758 | attr += namesp->attr_namelen; | |
759 | error = namesp->attr_capable(vp, NULL); | |
760 | if (error) | |
761 | return error; | |
762 | xflags |= namesp->attr_flag; | |
763 | return namesp->attr_remove(vp, attr, xflags); | |
764 | } | |
765 | ||
766 | ||
c5ef1c42 | 767 | const struct inode_operations xfs_inode_operations = { |
416c6d5b NS |
768 | .permission = xfs_vn_permission, |
769 | .truncate = xfs_vn_truncate, | |
770 | .getattr = xfs_vn_getattr, | |
771 | .setattr = xfs_vn_setattr, | |
772 | .setxattr = xfs_vn_setxattr, | |
773 | .getxattr = xfs_vn_getxattr, | |
774 | .listxattr = xfs_vn_listxattr, | |
775 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
776 | }; |
777 | ||
c5ef1c42 | 778 | const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
779 | .create = xfs_vn_create, |
780 | .lookup = xfs_vn_lookup, | |
781 | .link = xfs_vn_link, | |
782 | .unlink = xfs_vn_unlink, | |
783 | .symlink = xfs_vn_symlink, | |
784 | .mkdir = xfs_vn_mkdir, | |
785 | .rmdir = xfs_vn_rmdir, | |
786 | .mknod = xfs_vn_mknod, | |
787 | .rename = xfs_vn_rename, | |
788 | .permission = xfs_vn_permission, | |
789 | .getattr = xfs_vn_getattr, | |
790 | .setattr = xfs_vn_setattr, | |
791 | .setxattr = xfs_vn_setxattr, | |
792 | .getxattr = xfs_vn_getxattr, | |
793 | .listxattr = xfs_vn_listxattr, | |
794 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
795 | }; |
796 | ||
c5ef1c42 | 797 | const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 798 | .readlink = generic_readlink, |
416c6d5b NS |
799 | .follow_link = xfs_vn_follow_link, |
800 | .put_link = xfs_vn_put_link, | |
801 | .permission = xfs_vn_permission, | |
802 | .getattr = xfs_vn_getattr, | |
803 | .setattr = xfs_vn_setattr, | |
804 | .setxattr = xfs_vn_setxattr, | |
805 | .getxattr = xfs_vn_getxattr, | |
806 | .listxattr = xfs_vn_listxattr, | |
807 | .removexattr = xfs_vn_removexattr, | |
1da177e4 | 808 | }; |