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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" | |
46 | #include "xfs_cap.h" | |
47 | #include "xfs_mac.h" | |
48 | #include "xfs_attr.h" | |
49 | #include "xfs_buf_item.h" | |
50 | #include "xfs_utils.h" | |
51 | ||
16f7e0fe | 52 | #include <linux/capability.h> |
1da177e4 LT |
53 | #include <linux/xattr.h> |
54 | #include <linux/namei.h> | |
446ada4a | 55 | #include <linux/security.h> |
1da177e4 | 56 | |
75e17b3c CH |
57 | /* |
58 | * Get a XFS inode from a given vnode. | |
59 | */ | |
60 | xfs_inode_t * | |
61 | xfs_vtoi( | |
67fcaa73 | 62 | bhv_vnode_t *vp) |
75e17b3c CH |
63 | { |
64 | bhv_desc_t *bdp; | |
65 | ||
66 | bdp = bhv_lookup_range(VN_BHV_HEAD(vp), | |
67 | VNODE_POSITION_XFS, VNODE_POSITION_XFS); | |
68 | if (unlikely(bdp == NULL)) | |
69 | return NULL; | |
70 | return XFS_BHVTOI(bdp); | |
71 | } | |
72 | ||
42fe2b1f CH |
73 | /* |
74 | * Bring the atime in the XFS inode uptodate. | |
75 | * Used before logging the inode to disk or when the Linux inode goes away. | |
76 | */ | |
77 | void | |
78 | xfs_synchronize_atime( | |
79 | xfs_inode_t *ip) | |
80 | { | |
67fcaa73 | 81 | bhv_vnode_t *vp; |
42fe2b1f CH |
82 | |
83 | vp = XFS_ITOV_NULL(ip); | |
84 | if (vp) { | |
85 | struct inode *inode = &vp->v_inode; | |
86 | ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; | |
87 | ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; | |
88 | } | |
89 | } | |
90 | ||
4aeb664c NS |
91 | /* |
92 | * Change the requested timestamp in the given inode. | |
93 | * We don't lock across timestamp updates, and we don't log them but | |
94 | * we do record the fact that there is dirty information in core. | |
95 | * | |
96 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG | |
97 | * with XFS_ICHGTIME_ACC to be sure that access time | |
98 | * update will take. Calling first with XFS_ICHGTIME_ACC | |
99 | * and then XFS_ICHGTIME_MOD may fail to modify the access | |
100 | * timestamp if the filesystem is mounted noacctm. | |
101 | */ | |
102 | void | |
103 | xfs_ichgtime( | |
104 | xfs_inode_t *ip, | |
105 | int flags) | |
106 | { | |
ec86dc02 | 107 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
4aeb664c NS |
108 | timespec_t tv; |
109 | ||
4aeb664c NS |
110 | nanotime(&tv); |
111 | if (flags & XFS_ICHGTIME_MOD) { | |
112 | inode->i_mtime = tv; | |
113 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
114 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
115 | } | |
116 | if (flags & XFS_ICHGTIME_ACC) { | |
117 | inode->i_atime = tv; | |
118 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; | |
119 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; | |
120 | } | |
121 | if (flags & XFS_ICHGTIME_CHG) { | |
122 | inode->i_ctime = tv; | |
123 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
124 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
125 | } | |
126 | ||
127 | /* | |
128 | * We update the i_update_core field _after_ changing | |
129 | * the timestamps in order to coordinate properly with | |
130 | * xfs_iflush() so that we don't lose timestamp updates. | |
131 | * This keeps us from having to hold the inode lock | |
132 | * while doing this. We use the SYNCHRONIZE macro to | |
133 | * ensure that the compiler does not reorder the update | |
134 | * of i_update_core above the timestamp updates above. | |
135 | */ | |
136 | SYNCHRONIZE(); | |
137 | ip->i_update_core = 1; | |
138 | if (!(inode->i_state & I_LOCK)) | |
139 | mark_inode_dirty_sync(inode); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Variant on the above which avoids querying the system clock | |
144 | * in situations where we know the Linux inode timestamps have | |
145 | * just been updated (and so we can update our inode cheaply). | |
4aeb664c NS |
146 | */ |
147 | void | |
148 | xfs_ichgtime_fast( | |
149 | xfs_inode_t *ip, | |
150 | struct inode *inode, | |
151 | int flags) | |
152 | { | |
153 | timespec_t *tvp; | |
154 | ||
155 | /* | |
42fe2b1f CH |
156 | * Atime updates for read() & friends are handled lazily now, and |
157 | * explicit updates must go through xfs_ichgtime() | |
4aeb664c | 158 | */ |
42fe2b1f | 159 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
4aeb664c NS |
160 | |
161 | /* | |
42fe2b1f CH |
162 | * We're not supposed to change timestamps in readonly-mounted |
163 | * filesystems. Throw it away if anyone asks us. | |
4aeb664c | 164 | */ |
42fe2b1f | 165 | if (unlikely(IS_RDONLY(inode))) |
4aeb664c NS |
166 | return; |
167 | ||
168 | if (flags & XFS_ICHGTIME_MOD) { | |
169 | tvp = &inode->i_mtime; | |
170 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; | |
171 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; | |
172 | } | |
4aeb664c NS |
173 | if (flags & XFS_ICHGTIME_CHG) { |
174 | tvp = &inode->i_ctime; | |
175 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; | |
176 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; | |
177 | } | |
178 | ||
179 | /* | |
180 | * We update the i_update_core field _after_ changing | |
181 | * the timestamps in order to coordinate properly with | |
182 | * xfs_iflush() so that we don't lose timestamp updates. | |
183 | * This keeps us from having to hold the inode lock | |
184 | * while doing this. We use the SYNCHRONIZE macro to | |
185 | * ensure that the compiler does not reorder the update | |
186 | * of i_update_core above the timestamp updates above. | |
187 | */ | |
188 | SYNCHRONIZE(); | |
189 | ip->i_update_core = 1; | |
190 | if (!(inode->i_state & I_LOCK)) | |
191 | mark_inode_dirty_sync(inode); | |
192 | } | |
193 | ||
1da177e4 LT |
194 | |
195 | /* | |
196 | * Pull the link count and size up from the xfs inode to the linux inode | |
197 | */ | |
198 | STATIC void | |
416c6d5b | 199 | xfs_validate_fields( |
220b5284 | 200 | struct inode *ip, |
8285fb58 | 201 | bhv_vattr_t *vattr) |
1da177e4 | 202 | { |
220b5284 | 203 | vattr->va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; |
67fcaa73 | 204 | if (!bhv_vop_getattr(vn_from_inode(ip), vattr, ATTR_LAZY, NULL)) { |
220b5284 NS |
205 | ip->i_nlink = vattr->va_nlink; |
206 | ip->i_blocks = vattr->va_nblocks; | |
1da177e4 | 207 | |
220b5284 NS |
208 | /* we're under i_sem so i_size can't change under us */ |
209 | if (i_size_read(ip) != vattr->va_size) | |
210 | i_size_write(ip, vattr->va_size); | |
1da177e4 LT |
211 | } |
212 | } | |
213 | ||
446ada4a NS |
214 | /* |
215 | * Hook in SELinux. This is not quite correct yet, what we really need | |
216 | * here (as we do for default ACLs) is a mechanism by which creation of | |
217 | * these attrs can be journalled at inode creation time (along with the | |
218 | * inode, of course, such that log replay can't cause these to be lost). | |
219 | */ | |
220 | STATIC int | |
416c6d5b | 221 | xfs_init_security( |
67fcaa73 | 222 | bhv_vnode_t *vp, |
446ada4a NS |
223 | struct inode *dir) |
224 | { | |
ec86dc02 | 225 | struct inode *ip = vn_to_inode(vp); |
446ada4a NS |
226 | size_t length; |
227 | void *value; | |
228 | char *name; | |
229 | int error; | |
230 | ||
231 | error = security_inode_init_security(ip, dir, &name, &value, &length); | |
232 | if (error) { | |
233 | if (error == -EOPNOTSUPP) | |
234 | return 0; | |
235 | return -error; | |
236 | } | |
237 | ||
67fcaa73 | 238 | error = bhv_vop_attr_set(vp, name, value, length, ATTR_SECURE, NULL); |
446ada4a NS |
239 | if (!error) |
240 | VMODIFY(vp); | |
241 | ||
242 | kfree(name); | |
243 | kfree(value); | |
244 | return error; | |
245 | } | |
246 | ||
1da177e4 LT |
247 | /* |
248 | * Determine whether a process has a valid fs_struct (kernel daemons | |
249 | * like knfsd don't have an fs_struct). | |
250 | * | |
251 | * XXX(hch): nfsd is broken, better fix it instead. | |
252 | */ | |
7989cb8e | 253 | STATIC_INLINE int |
416c6d5b | 254 | xfs_has_fs_struct(struct task_struct *task) |
1da177e4 LT |
255 | { |
256 | return (task->fs != init_task.fs); | |
257 | } | |
258 | ||
7989cb8e | 259 | STATIC void |
416c6d5b | 260 | xfs_cleanup_inode( |
67fcaa73 NS |
261 | bhv_vnode_t *dvp, |
262 | bhv_vnode_t *vp, | |
220b5284 | 263 | struct dentry *dentry, |
3a69c7dc YL |
264 | int mode) |
265 | { | |
266 | struct dentry teardown = {}; | |
3a69c7dc YL |
267 | |
268 | /* Oh, the horror. | |
220b5284 | 269 | * If we can't add the ACL or we fail in |
416c6d5b | 270 | * xfs_init_security we must back out. |
3a69c7dc YL |
271 | * ENOSPC can hit here, among other things. |
272 | */ | |
ec86dc02 | 273 | teardown.d_inode = vn_to_inode(vp); |
3a69c7dc YL |
274 | teardown.d_name = dentry->d_name; |
275 | ||
276 | if (S_ISDIR(mode)) | |
67fcaa73 | 277 | bhv_vop_rmdir(dvp, &teardown, NULL); |
3a69c7dc | 278 | else |
67fcaa73 | 279 | bhv_vop_remove(dvp, &teardown, NULL); |
3a69c7dc YL |
280 | VN_RELE(vp); |
281 | } | |
282 | ||
1da177e4 | 283 | STATIC int |
416c6d5b | 284 | xfs_vn_mknod( |
1da177e4 LT |
285 | struct inode *dir, |
286 | struct dentry *dentry, | |
287 | int mode, | |
288 | dev_t rdev) | |
289 | { | |
290 | struct inode *ip; | |
8285fb58 | 291 | bhv_vattr_t vattr = { 0 }; |
67fcaa73 | 292 | bhv_vnode_t *vp = NULL, *dvp = vn_from_inode(dir); |
1da177e4 LT |
293 | xfs_acl_t *default_acl = NULL; |
294 | attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; | |
295 | int error; | |
296 | ||
297 | /* | |
298 | * Irix uses Missed'em'V split, but doesn't want to see | |
299 | * the upper 5 bits of (14bit) major. | |
300 | */ | |
220b5284 | 301 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
1da177e4 LT |
302 | return -EINVAL; |
303 | ||
220b5284 NS |
304 | if (unlikely(test_default_acl && test_default_acl(dvp))) { |
305 | if (!_ACL_ALLOC(default_acl)) { | |
1da177e4 | 306 | return -ENOMEM; |
220b5284 | 307 | } |
1da177e4 LT |
308 | if (!_ACL_GET_DEFAULT(dvp, default_acl)) { |
309 | _ACL_FREE(default_acl); | |
310 | default_acl = NULL; | |
311 | } | |
312 | } | |
313 | ||
416c6d5b | 314 | if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current)) |
1da177e4 LT |
315 | mode &= ~current->fs->umask; |
316 | ||
524fbf5d NS |
317 | vattr.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
318 | vattr.va_mode = mode; | |
1da177e4 LT |
319 | |
320 | switch (mode & S_IFMT) { | |
321 | case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: | |
524fbf5d NS |
322 | vattr.va_rdev = sysv_encode_dev(rdev); |
323 | vattr.va_mask |= XFS_AT_RDEV; | |
1da177e4 LT |
324 | /*FALLTHROUGH*/ |
325 | case S_IFREG: | |
67fcaa73 | 326 | error = bhv_vop_create(dvp, dentry, &vattr, &vp, NULL); |
1da177e4 LT |
327 | break; |
328 | case S_IFDIR: | |
67fcaa73 | 329 | error = bhv_vop_mkdir(dvp, dentry, &vattr, &vp, NULL); |
1da177e4 LT |
330 | break; |
331 | default: | |
332 | error = EINVAL; | |
333 | break; | |
334 | } | |
335 | ||
220b5284 | 336 | if (unlikely(!error)) { |
416c6d5b | 337 | error = xfs_init_security(vp, dir); |
3a69c7dc | 338 | if (error) |
416c6d5b | 339 | xfs_cleanup_inode(dvp, vp, dentry, mode); |
3a69c7dc | 340 | } |
446ada4a | 341 | |
220b5284 | 342 | if (unlikely(default_acl)) { |
1da177e4 | 343 | if (!error) { |
524fbf5d | 344 | error = _ACL_INHERIT(vp, &vattr, default_acl); |
220b5284 | 345 | if (!error) |
1da177e4 | 346 | VMODIFY(vp); |
3a69c7dc | 347 | else |
416c6d5b | 348 | xfs_cleanup_inode(dvp, vp, dentry, mode); |
1da177e4 LT |
349 | } |
350 | _ACL_FREE(default_acl); | |
351 | } | |
352 | ||
220b5284 | 353 | if (likely(!error)) { |
1da177e4 | 354 | ASSERT(vp); |
ec86dc02 | 355 | ip = vn_to_inode(vp); |
1da177e4 LT |
356 | |
357 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
358 | ip->i_rdev = rdev; | |
359 | else if (S_ISDIR(mode)) | |
524fbf5d | 360 | xfs_validate_fields(ip, &vattr); |
1da177e4 | 361 | d_instantiate(dentry, ip); |
524fbf5d | 362 | xfs_validate_fields(dir, &vattr); |
1da177e4 LT |
363 | } |
364 | return -error; | |
365 | } | |
366 | ||
367 | STATIC int | |
416c6d5b | 368 | xfs_vn_create( |
1da177e4 LT |
369 | struct inode *dir, |
370 | struct dentry *dentry, | |
371 | int mode, | |
372 | struct nameidata *nd) | |
373 | { | |
416c6d5b | 374 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
375 | } |
376 | ||
377 | STATIC int | |
416c6d5b | 378 | xfs_vn_mkdir( |
1da177e4 LT |
379 | struct inode *dir, |
380 | struct dentry *dentry, | |
381 | int mode) | |
382 | { | |
416c6d5b | 383 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
384 | } |
385 | ||
386 | STATIC struct dentry * | |
416c6d5b | 387 | xfs_vn_lookup( |
1da177e4 LT |
388 | struct inode *dir, |
389 | struct dentry *dentry, | |
390 | struct nameidata *nd) | |
391 | { | |
67fcaa73 | 392 | bhv_vnode_t *vp = vn_from_inode(dir), *cvp; |
1da177e4 LT |
393 | int error; |
394 | ||
395 | if (dentry->d_name.len >= MAXNAMELEN) | |
396 | return ERR_PTR(-ENAMETOOLONG); | |
397 | ||
67fcaa73 NS |
398 | error = bhv_vop_lookup(vp, dentry, &cvp, 0, NULL, NULL); |
399 | if (unlikely(error)) { | |
1da177e4 LT |
400 | if (unlikely(error != ENOENT)) |
401 | return ERR_PTR(-error); | |
402 | d_add(dentry, NULL); | |
403 | return NULL; | |
404 | } | |
405 | ||
ec86dc02 | 406 | return d_splice_alias(vn_to_inode(cvp), dentry); |
1da177e4 LT |
407 | } |
408 | ||
409 | STATIC int | |
416c6d5b | 410 | xfs_vn_link( |
1da177e4 LT |
411 | struct dentry *old_dentry, |
412 | struct inode *dir, | |
413 | struct dentry *dentry) | |
414 | { | |
415 | struct inode *ip; /* inode of guy being linked to */ | |
67fcaa73 NS |
416 | bhv_vnode_t *tdvp; /* target directory for new name/link */ |
417 | bhv_vnode_t *vp; /* vp of name being linked */ | |
8285fb58 | 418 | bhv_vattr_t vattr; |
1da177e4 LT |
419 | int error; |
420 | ||
421 | ip = old_dentry->d_inode; /* inode being linked to */ | |
ec86dc02 NS |
422 | tdvp = vn_from_inode(dir); |
423 | vp = vn_from_inode(ip); | |
1da177e4 | 424 | |
97dfd70c | 425 | VN_HOLD(vp); |
67fcaa73 | 426 | error = bhv_vop_link(tdvp, vp, dentry, NULL); |
97dfd70c NS |
427 | if (unlikely(error)) { |
428 | VN_RELE(vp); | |
429 | } else { | |
1da177e4 | 430 | VMODIFY(tdvp); |
524fbf5d | 431 | xfs_validate_fields(ip, &vattr); |
1da177e4 LT |
432 | d_instantiate(dentry, ip); |
433 | } | |
434 | return -error; | |
435 | } | |
436 | ||
437 | STATIC int | |
416c6d5b | 438 | xfs_vn_unlink( |
1da177e4 LT |
439 | struct inode *dir, |
440 | struct dentry *dentry) | |
441 | { | |
442 | struct inode *inode; | |
67fcaa73 | 443 | bhv_vnode_t *dvp; /* directory containing name to remove */ |
8285fb58 | 444 | bhv_vattr_t vattr; |
1da177e4 LT |
445 | int error; |
446 | ||
447 | inode = dentry->d_inode; | |
ec86dc02 | 448 | dvp = vn_from_inode(dir); |
1da177e4 | 449 | |
67fcaa73 | 450 | error = bhv_vop_remove(dvp, dentry, NULL); |
220b5284 | 451 | if (likely(!error)) { |
524fbf5d NS |
452 | xfs_validate_fields(dir, &vattr); /* size needs update */ |
453 | xfs_validate_fields(inode, &vattr); | |
1da177e4 | 454 | } |
1da177e4 LT |
455 | return -error; |
456 | } | |
457 | ||
458 | STATIC int | |
416c6d5b | 459 | xfs_vn_symlink( |
1da177e4 LT |
460 | struct inode *dir, |
461 | struct dentry *dentry, | |
462 | const char *symname) | |
463 | { | |
464 | struct inode *ip; | |
8285fb58 | 465 | bhv_vattr_t va = { 0 }; |
67fcaa73 NS |
466 | bhv_vnode_t *dvp; /* directory containing name of symlink */ |
467 | bhv_vnode_t *cvp; /* used to lookup symlink to put in dentry */ | |
1da177e4 LT |
468 | int error; |
469 | ||
ec86dc02 | 470 | dvp = vn_from_inode(dir); |
1da177e4 LT |
471 | cvp = NULL; |
472 | ||
67fcaa73 | 473 | va.va_mode = S_IFLNK | |
0432dab2 | 474 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
67fcaa73 | 475 | va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
1da177e4 | 476 | |
67fcaa73 | 477 | error = bhv_vop_symlink(dvp, dentry, &va, (char *)symname, &cvp, NULL); |
54245702 | 478 | if (likely(!error && cvp)) { |
416c6d5b | 479 | error = xfs_init_security(cvp, dir); |
54245702 | 480 | if (likely(!error)) { |
ec86dc02 | 481 | ip = vn_to_inode(cvp); |
54245702 | 482 | d_instantiate(dentry, ip); |
67fcaa73 NS |
483 | xfs_validate_fields(dir, &va); |
484 | xfs_validate_fields(ip, &va); | |
ce9d37c2 NS |
485 | } else { |
486 | xfs_cleanup_inode(dvp, cvp, dentry, 0); | |
54245702 | 487 | } |
1da177e4 LT |
488 | } |
489 | return -error; | |
490 | } | |
491 | ||
492 | STATIC int | |
416c6d5b | 493 | xfs_vn_rmdir( |
1da177e4 LT |
494 | struct inode *dir, |
495 | struct dentry *dentry) | |
496 | { | |
497 | struct inode *inode = dentry->d_inode; | |
67fcaa73 | 498 | bhv_vnode_t *dvp = vn_from_inode(dir); |
8285fb58 | 499 | bhv_vattr_t vattr; |
1da177e4 LT |
500 | int error; |
501 | ||
67fcaa73 | 502 | error = bhv_vop_rmdir(dvp, dentry, NULL); |
220b5284 | 503 | if (likely(!error)) { |
524fbf5d NS |
504 | xfs_validate_fields(inode, &vattr); |
505 | xfs_validate_fields(dir, &vattr); | |
1da177e4 LT |
506 | } |
507 | return -error; | |
508 | } | |
509 | ||
510 | STATIC int | |
416c6d5b | 511 | xfs_vn_rename( |
1da177e4 LT |
512 | struct inode *odir, |
513 | struct dentry *odentry, | |
514 | struct inode *ndir, | |
515 | struct dentry *ndentry) | |
516 | { | |
517 | struct inode *new_inode = ndentry->d_inode; | |
67fcaa73 NS |
518 | bhv_vnode_t *fvp; /* from directory */ |
519 | bhv_vnode_t *tvp; /* target directory */ | |
8285fb58 | 520 | bhv_vattr_t vattr; |
1da177e4 LT |
521 | int error; |
522 | ||
ec86dc02 NS |
523 | fvp = vn_from_inode(odir); |
524 | tvp = vn_from_inode(ndir); | |
1da177e4 | 525 | |
67fcaa73 | 526 | error = bhv_vop_rename(fvp, odentry, tvp, ndentry, NULL); |
220b5284 NS |
527 | if (likely(!error)) { |
528 | if (new_inode) | |
524fbf5d NS |
529 | xfs_validate_fields(new_inode, &vattr); |
530 | xfs_validate_fields(odir, &vattr); | |
220b5284 | 531 | if (ndir != odir) |
524fbf5d | 532 | xfs_validate_fields(ndir, &vattr); |
220b5284 | 533 | } |
220b5284 | 534 | return -error; |
1da177e4 LT |
535 | } |
536 | ||
537 | /* | |
538 | * careful here - this function can get called recursively, so | |
539 | * we need to be very careful about how much stack we use. | |
540 | * uio is kmalloced for this reason... | |
541 | */ | |
008b150a | 542 | STATIC void * |
416c6d5b | 543 | xfs_vn_follow_link( |
1da177e4 LT |
544 | struct dentry *dentry, |
545 | struct nameidata *nd) | |
546 | { | |
67fcaa73 | 547 | bhv_vnode_t *vp; |
1da177e4 LT |
548 | uio_t *uio; |
549 | iovec_t iov; | |
550 | int error; | |
551 | char *link; | |
552 | ||
553 | ASSERT(dentry); | |
554 | ASSERT(nd); | |
555 | ||
f52720ca | 556 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
1da177e4 LT |
557 | if (!link) { |
558 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 559 | return NULL; |
1da177e4 LT |
560 | } |
561 | ||
f52720ca | 562 | uio = kmalloc(sizeof(uio_t), GFP_KERNEL); |
1da177e4 LT |
563 | if (!uio) { |
564 | kfree(link); | |
565 | nd_set_link(nd, ERR_PTR(-ENOMEM)); | |
008b150a | 566 | return NULL; |
1da177e4 LT |
567 | } |
568 | ||
ec86dc02 | 569 | vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
570 | |
571 | iov.iov_base = link; | |
0d1335b3 | 572 | iov.iov_len = MAXPATHLEN; |
1da177e4 LT |
573 | |
574 | uio->uio_iov = &iov; | |
575 | uio->uio_offset = 0; | |
576 | uio->uio_segflg = UIO_SYSSPACE; | |
0d1335b3 | 577 | uio->uio_resid = MAXPATHLEN; |
1da177e4 LT |
578 | uio->uio_iovcnt = 1; |
579 | ||
67fcaa73 NS |
580 | error = bhv_vop_readlink(vp, uio, 0, NULL); |
581 | if (unlikely(error)) { | |
1da177e4 LT |
582 | kfree(link); |
583 | link = ERR_PTR(-error); | |
584 | } else { | |
0d1335b3 | 585 | link[MAXPATHLEN - uio->uio_resid] = '\0'; |
1da177e4 LT |
586 | } |
587 | kfree(uio); | |
588 | ||
589 | nd_set_link(nd, link); | |
008b150a | 590 | return NULL; |
1da177e4 LT |
591 | } |
592 | ||
cde410a9 | 593 | STATIC void |
416c6d5b | 594 | xfs_vn_put_link( |
cde410a9 NS |
595 | struct dentry *dentry, |
596 | struct nameidata *nd, | |
597 | void *p) | |
1da177e4 | 598 | { |
cde410a9 NS |
599 | char *s = nd_get_link(nd); |
600 | ||
1da177e4 LT |
601 | if (!IS_ERR(s)) |
602 | kfree(s); | |
603 | } | |
604 | ||
605 | #ifdef CONFIG_XFS_POSIX_ACL | |
606 | STATIC int | |
416c6d5b | 607 | xfs_vn_permission( |
1da177e4 LT |
608 | struct inode *inode, |
609 | int mode, | |
610 | struct nameidata *nd) | |
611 | { | |
67fcaa73 | 612 | return -bhv_vop_access(vn_from_inode(inode), mode << 6, NULL); |
1da177e4 LT |
613 | } |
614 | #else | |
416c6d5b | 615 | #define xfs_vn_permission NULL |
1da177e4 LT |
616 | #endif |
617 | ||
618 | STATIC int | |
416c6d5b | 619 | xfs_vn_getattr( |
1da177e4 LT |
620 | struct vfsmount *mnt, |
621 | struct dentry *dentry, | |
622 | struct kstat *stat) | |
623 | { | |
624 | struct inode *inode = dentry->d_inode; | |
67fcaa73 | 625 | bhv_vnode_t *vp = vn_from_inode(inode); |
69e23b9a NS |
626 | bhv_vattr_t vattr = { .va_mask = XFS_AT_STAT }; |
627 | int error; | |
1da177e4 | 628 | |
69e23b9a NS |
629 | error = bhv_vop_getattr(vp, &vattr, ATTR_LAZY, NULL); |
630 | if (likely(!error)) { | |
631 | stat->size = i_size_read(inode); | |
632 | stat->dev = inode->i_sb->s_dev; | |
633 | stat->rdev = (vattr.va_rdev == 0) ? 0 : | |
634 | MKDEV(sysv_major(vattr.va_rdev) & 0x1ff, | |
635 | sysv_minor(vattr.va_rdev)); | |
636 | stat->mode = vattr.va_mode; | |
637 | stat->nlink = vattr.va_nlink; | |
638 | stat->uid = vattr.va_uid; | |
639 | stat->gid = vattr.va_gid; | |
640 | stat->ino = vattr.va_nodeid; | |
641 | stat->atime = vattr.va_atime; | |
642 | stat->mtime = vattr.va_mtime; | |
643 | stat->ctime = vattr.va_ctime; | |
644 | stat->blocks = vattr.va_nblocks; | |
645 | stat->blksize = vattr.va_blocksize; | |
646 | } | |
b76963fa | 647 | return -error; |
1da177e4 LT |
648 | } |
649 | ||
650 | STATIC int | |
416c6d5b | 651 | xfs_vn_setattr( |
1da177e4 LT |
652 | struct dentry *dentry, |
653 | struct iattr *attr) | |
654 | { | |
655 | struct inode *inode = dentry->d_inode; | |
656 | unsigned int ia_valid = attr->ia_valid; | |
67fcaa73 | 657 | bhv_vnode_t *vp = vn_from_inode(inode); |
8285fb58 | 658 | bhv_vattr_t vattr = { 0 }; |
1da177e4 LT |
659 | int flags = 0; |
660 | int error; | |
661 | ||
1da177e4 LT |
662 | if (ia_valid & ATTR_UID) { |
663 | vattr.va_mask |= XFS_AT_UID; | |
664 | vattr.va_uid = attr->ia_uid; | |
665 | } | |
666 | if (ia_valid & ATTR_GID) { | |
667 | vattr.va_mask |= XFS_AT_GID; | |
668 | vattr.va_gid = attr->ia_gid; | |
669 | } | |
670 | if (ia_valid & ATTR_SIZE) { | |
671 | vattr.va_mask |= XFS_AT_SIZE; | |
672 | vattr.va_size = attr->ia_size; | |
673 | } | |
674 | if (ia_valid & ATTR_ATIME) { | |
675 | vattr.va_mask |= XFS_AT_ATIME; | |
676 | vattr.va_atime = attr->ia_atime; | |
8c0b5113 | 677 | inode->i_atime = attr->ia_atime; |
1da177e4 LT |
678 | } |
679 | if (ia_valid & ATTR_MTIME) { | |
680 | vattr.va_mask |= XFS_AT_MTIME; | |
681 | vattr.va_mtime = attr->ia_mtime; | |
682 | } | |
683 | if (ia_valid & ATTR_CTIME) { | |
684 | vattr.va_mask |= XFS_AT_CTIME; | |
685 | vattr.va_ctime = attr->ia_ctime; | |
686 | } | |
687 | if (ia_valid & ATTR_MODE) { | |
688 | vattr.va_mask |= XFS_AT_MODE; | |
689 | vattr.va_mode = attr->ia_mode; | |
690 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
691 | inode->i_mode &= ~S_ISGID; | |
692 | } | |
693 | ||
694 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) | |
695 | flags |= ATTR_UTIME; | |
696 | #ifdef ATTR_NO_BLOCK | |
697 | if ((ia_valid & ATTR_NO_BLOCK)) | |
698 | flags |= ATTR_NONBLOCK; | |
699 | #endif | |
700 | ||
67fcaa73 | 701 | error = bhv_vop_setattr(vp, &vattr, flags, NULL); |
220b5284 NS |
702 | if (likely(!error)) |
703 | __vn_revalidate(vp, &vattr); | |
704 | return -error; | |
1da177e4 LT |
705 | } |
706 | ||
707 | STATIC void | |
416c6d5b | 708 | xfs_vn_truncate( |
1da177e4 LT |
709 | struct inode *inode) |
710 | { | |
c2536668 | 711 | block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks); |
1da177e4 LT |
712 | } |
713 | ||
714 | STATIC int | |
416c6d5b | 715 | xfs_vn_setxattr( |
1da177e4 LT |
716 | struct dentry *dentry, |
717 | const char *name, | |
718 | const void *data, | |
719 | size_t size, | |
720 | int flags) | |
721 | { | |
67fcaa73 | 722 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
723 | char *attr = (char *)name; |
724 | attrnames_t *namesp; | |
725 | int xflags = 0; | |
726 | int error; | |
727 | ||
728 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
729 | if (!namesp) | |
730 | return -EOPNOTSUPP; | |
731 | attr += namesp->attr_namelen; | |
732 | error = namesp->attr_capable(vp, NULL); | |
733 | if (error) | |
734 | return error; | |
735 | ||
736 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
737 | if (flags & XATTR_CREATE) | |
738 | xflags |= ATTR_CREATE; | |
739 | if (flags & XATTR_REPLACE) | |
740 | xflags |= ATTR_REPLACE; | |
741 | xflags |= namesp->attr_flag; | |
742 | return namesp->attr_set(vp, attr, (void *)data, size, xflags); | |
743 | } | |
744 | ||
745 | STATIC ssize_t | |
416c6d5b | 746 | xfs_vn_getxattr( |
1da177e4 LT |
747 | struct dentry *dentry, |
748 | const char *name, | |
749 | void *data, | |
750 | size_t size) | |
751 | { | |
67fcaa73 | 752 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
753 | char *attr = (char *)name; |
754 | attrnames_t *namesp; | |
755 | int xflags = 0; | |
756 | ssize_t error; | |
757 | ||
758 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
759 | if (!namesp) | |
760 | return -EOPNOTSUPP; | |
761 | attr += namesp->attr_namelen; | |
762 | error = namesp->attr_capable(vp, NULL); | |
763 | if (error) | |
764 | return error; | |
765 | ||
766 | /* Convert Linux syscall to XFS internal ATTR flags */ | |
767 | if (!size) { | |
768 | xflags |= ATTR_KERNOVAL; | |
769 | data = NULL; | |
770 | } | |
771 | xflags |= namesp->attr_flag; | |
772 | return namesp->attr_get(vp, attr, (void *)data, size, xflags); | |
773 | } | |
774 | ||
775 | STATIC ssize_t | |
416c6d5b | 776 | xfs_vn_listxattr( |
1da177e4 LT |
777 | struct dentry *dentry, |
778 | char *data, | |
779 | size_t size) | |
780 | { | |
67fcaa73 | 781 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
782 | int error, xflags = ATTR_KERNAMELS; |
783 | ssize_t result; | |
784 | ||
785 | if (!size) | |
786 | xflags |= ATTR_KERNOVAL; | |
787 | xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; | |
788 | ||
789 | error = attr_generic_list(vp, data, size, xflags, &result); | |
790 | if (error < 0) | |
791 | return error; | |
792 | return result; | |
793 | } | |
794 | ||
795 | STATIC int | |
416c6d5b | 796 | xfs_vn_removexattr( |
1da177e4 LT |
797 | struct dentry *dentry, |
798 | const char *name) | |
799 | { | |
67fcaa73 | 800 | bhv_vnode_t *vp = vn_from_inode(dentry->d_inode); |
1da177e4 LT |
801 | char *attr = (char *)name; |
802 | attrnames_t *namesp; | |
803 | int xflags = 0; | |
804 | int error; | |
805 | ||
806 | namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); | |
807 | if (!namesp) | |
808 | return -EOPNOTSUPP; | |
809 | attr += namesp->attr_namelen; | |
810 | error = namesp->attr_capable(vp, NULL); | |
811 | if (error) | |
812 | return error; | |
813 | xflags |= namesp->attr_flag; | |
814 | return namesp->attr_remove(vp, attr, xflags); | |
815 | } | |
816 | ||
817 | ||
416c6d5b NS |
818 | struct inode_operations xfs_inode_operations = { |
819 | .permission = xfs_vn_permission, | |
820 | .truncate = xfs_vn_truncate, | |
821 | .getattr = xfs_vn_getattr, | |
822 | .setattr = xfs_vn_setattr, | |
823 | .setxattr = xfs_vn_setxattr, | |
824 | .getxattr = xfs_vn_getxattr, | |
825 | .listxattr = xfs_vn_listxattr, | |
826 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
827 | }; |
828 | ||
416c6d5b NS |
829 | struct inode_operations xfs_dir_inode_operations = { |
830 | .create = xfs_vn_create, | |
831 | .lookup = xfs_vn_lookup, | |
832 | .link = xfs_vn_link, | |
833 | .unlink = xfs_vn_unlink, | |
834 | .symlink = xfs_vn_symlink, | |
835 | .mkdir = xfs_vn_mkdir, | |
836 | .rmdir = xfs_vn_rmdir, | |
837 | .mknod = xfs_vn_mknod, | |
838 | .rename = xfs_vn_rename, | |
839 | .permission = xfs_vn_permission, | |
840 | .getattr = xfs_vn_getattr, | |
841 | .setattr = xfs_vn_setattr, | |
842 | .setxattr = xfs_vn_setxattr, | |
843 | .getxattr = xfs_vn_getxattr, | |
844 | .listxattr = xfs_vn_listxattr, | |
845 | .removexattr = xfs_vn_removexattr, | |
1da177e4 LT |
846 | }; |
847 | ||
416c6d5b | 848 | struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 849 | .readlink = generic_readlink, |
416c6d5b NS |
850 | .follow_link = xfs_vn_follow_link, |
851 | .put_link = xfs_vn_put_link, | |
852 | .permission = xfs_vn_permission, | |
853 | .getattr = xfs_vn_getattr, | |
854 | .setattr = xfs_vn_setattr, | |
855 | .setxattr = xfs_vn_setxattr, | |
856 | .getxattr = xfs_vn_getxattr, | |
857 | .listxattr = xfs_vn_listxattr, | |
858 | .removexattr = xfs_vn_removexattr, | |
1da177e4 | 859 | }; |