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> |
f35642e2 | 56 | #include <linux/fiemap.h> |
1da177e4 | 57 | |
42fe2b1f CH |
58 | /* |
59 | * Bring the atime in the XFS inode uptodate. | |
60 | * Used before logging the inode to disk or when the Linux inode goes away. | |
61 | */ | |
62 | void | |
63 | xfs_synchronize_atime( | |
64 | xfs_inode_t *ip) | |
65 | { | |
01651646 | 66 | struct inode *inode = VFS_I(ip); |
42fe2b1f | 67 | |
bf904248 | 68 | if (!(inode->i_state & I_CLEAR)) { |
af048193 CH |
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; | |
42fe2b1f CH |
71 | } |
72 | } | |
73 | ||
5d51eff4 | 74 | /* |
bf904248 | 75 | * If the linux inode is valid, mark it dirty. |
5d51eff4 DC |
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 | { | |
01651646 | 83 | struct inode *inode = VFS_I(ip); |
5d51eff4 | 84 | |
bf904248 | 85 | if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR))) |
af048193 | 86 | mark_inode_dirty_sync(inode); |
5d51eff4 DC |
87 | } |
88 | ||
4aeb664c NS |
89 | /* |
90 | * Change the requested timestamp in the given inode. | |
91 | * We don't lock across timestamp updates, and we don't log them but | |
92 | * we do record the fact that there is dirty information in core. | |
4aeb664c NS |
93 | */ |
94 | void | |
95 | xfs_ichgtime( | |
96 | xfs_inode_t *ip, | |
97 | int flags) | |
98 | { | |
e4f75291 | 99 | struct inode *inode = VFS_I(ip); |
4aeb664c | 100 | timespec_t tv; |
8e5975c8 | 101 | int sync_it = 0; |
4aeb664c | 102 | |
8e5975c8 CH |
103 | tv = current_fs_time(inode->i_sb); |
104 | ||
105 | if ((flags & XFS_ICHGTIME_MOD) && | |
106 | !timespec_equal(&inode->i_mtime, &tv)) { | |
4aeb664c NS |
107 | inode->i_mtime = tv; |
108 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
109 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
8e5975c8 | 110 | sync_it = 1; |
4aeb664c | 111 | } |
8e5975c8 CH |
112 | if ((flags & XFS_ICHGTIME_CHG) && |
113 | !timespec_equal(&inode->i_ctime, &tv)) { | |
4aeb664c NS |
114 | inode->i_ctime = tv; |
115 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; | |
116 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; | |
8e5975c8 | 117 | sync_it = 1; |
4aeb664c NS |
118 | } |
119 | ||
120 | /* | |
121 | * We update the i_update_core field _after_ changing | |
122 | * the timestamps in order to coordinate properly with | |
123 | * xfs_iflush() so that we don't lose timestamp updates. | |
124 | * This keeps us from having to hold the inode lock | |
125 | * while doing this. We use the SYNCHRONIZE macro to | |
126 | * ensure that the compiler does not reorder the update | |
127 | * of i_update_core above the timestamp updates above. | |
128 | */ | |
8e5975c8 CH |
129 | if (sync_it) { |
130 | SYNCHRONIZE(); | |
131 | ip->i_update_core = 1; | |
94b97e39 | 132 | xfs_mark_inode_dirty_sync(ip); |
8e5975c8 | 133 | } |
4aeb664c NS |
134 | } |
135 | ||
446ada4a NS |
136 | /* |
137 | * Hook in SELinux. This is not quite correct yet, what we really need | |
138 | * here (as we do for default ACLs) is a mechanism by which creation of | |
139 | * these attrs can be journalled at inode creation time (along with the | |
140 | * inode, of course, such that log replay can't cause these to be lost). | |
141 | */ | |
142 | STATIC int | |
416c6d5b | 143 | xfs_init_security( |
af048193 | 144 | struct inode *inode, |
446ada4a NS |
145 | struct inode *dir) |
146 | { | |
af048193 | 147 | struct xfs_inode *ip = XFS_I(inode); |
446ada4a NS |
148 | size_t length; |
149 | void *value; | |
150 | char *name; | |
151 | int error; | |
152 | ||
af048193 CH |
153 | error = security_inode_init_security(inode, dir, &name, |
154 | &value, &length); | |
446ada4a NS |
155 | if (error) { |
156 | if (error == -EOPNOTSUPP) | |
157 | return 0; | |
158 | return -error; | |
159 | } | |
160 | ||
af048193 | 161 | error = xfs_attr_set(ip, name, value, length, ATTR_SECURE); |
446ada4a NS |
162 | |
163 | kfree(name); | |
164 | kfree(value); | |
165 | return error; | |
166 | } | |
167 | ||
556b8b16 BN |
168 | static void |
169 | xfs_dentry_to_name( | |
170 | struct xfs_name *namep, | |
171 | struct dentry *dentry) | |
172 | { | |
173 | namep->name = dentry->d_name.name; | |
174 | namep->len = dentry->d_name.len; | |
175 | } | |
176 | ||
7989cb8e | 177 | STATIC void |
416c6d5b | 178 | xfs_cleanup_inode( |
739bfb2a | 179 | struct inode *dir, |
af048193 | 180 | struct inode *inode, |
8f112e3b | 181 | struct dentry *dentry) |
3a69c7dc | 182 | { |
556b8b16 | 183 | struct xfs_name teardown; |
3a69c7dc YL |
184 | |
185 | /* Oh, the horror. | |
220b5284 | 186 | * If we can't add the ACL or we fail in |
416c6d5b | 187 | * xfs_init_security we must back out. |
3a69c7dc YL |
188 | * ENOSPC can hit here, among other things. |
189 | */ | |
556b8b16 | 190 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc | 191 | |
8f112e3b | 192 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
af048193 | 193 | iput(inode); |
3a69c7dc YL |
194 | } |
195 | ||
1da177e4 | 196 | STATIC int |
416c6d5b | 197 | xfs_vn_mknod( |
1da177e4 LT |
198 | struct inode *dir, |
199 | struct dentry *dentry, | |
200 | int mode, | |
201 | dev_t rdev) | |
202 | { | |
db0bb7ba | 203 | struct inode *inode; |
979ebab1 | 204 | struct xfs_inode *ip = NULL; |
1da177e4 | 205 | xfs_acl_t *default_acl = NULL; |
556b8b16 | 206 | struct xfs_name name; |
0ec58516 | 207 | int (*test_default_acl)(struct inode *) = _ACL_DEFAULT_EXISTS; |
1da177e4 LT |
208 | int error; |
209 | ||
210 | /* | |
211 | * Irix uses Missed'em'V split, but doesn't want to see | |
212 | * the upper 5 bits of (14bit) major. | |
213 | */ | |
220b5284 | 214 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
1da177e4 LT |
215 | return -EINVAL; |
216 | ||
979ebab1 | 217 | if (test_default_acl && test_default_acl(dir)) { |
220b5284 | 218 | if (!_ACL_ALLOC(default_acl)) { |
1da177e4 | 219 | return -ENOMEM; |
220b5284 | 220 | } |
979ebab1 | 221 | if (!_ACL_GET_DEFAULT(dir, default_acl)) { |
1da177e4 LT |
222 | _ACL_FREE(default_acl); |
223 | default_acl = NULL; | |
224 | } | |
225 | } | |
226 | ||
556b8b16 BN |
227 | xfs_dentry_to_name(&name, dentry); |
228 | ||
db0bb7ba | 229 | if (IS_POSIXACL(dir) && !default_acl) |
ce3b0f8d | 230 | mode &= ~current_umask(); |
1da177e4 | 231 | |
1da177e4 | 232 | switch (mode & S_IFMT) { |
db0bb7ba CH |
233 | case S_IFCHR: |
234 | case S_IFBLK: | |
235 | case S_IFIFO: | |
236 | case S_IFSOCK: | |
3e5daf05 | 237 | rdev = sysv_encode_dev(rdev); |
1da177e4 | 238 | case S_IFREG: |
556b8b16 | 239 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL); |
1da177e4 LT |
240 | break; |
241 | case S_IFDIR: | |
556b8b16 | 242 | error = xfs_mkdir(XFS_I(dir), &name, mode, &ip, NULL); |
1da177e4 LT |
243 | break; |
244 | default: | |
245 | error = EINVAL; | |
246 | break; | |
247 | } | |
248 | ||
db0bb7ba CH |
249 | if (unlikely(error)) |
250 | goto out_free_acl; | |
446ada4a | 251 | |
01651646 | 252 | inode = VFS_I(ip); |
979ebab1 CH |
253 | |
254 | error = xfs_init_security(inode, dir); | |
db0bb7ba CH |
255 | if (unlikely(error)) |
256 | goto out_cleanup_inode; | |
257 | ||
258 | if (default_acl) { | |
979ebab1 | 259 | error = _ACL_INHERIT(inode, mode, default_acl); |
db0bb7ba CH |
260 | if (unlikely(error)) |
261 | goto out_cleanup_inode; | |
1da177e4 LT |
262 | _ACL_FREE(default_acl); |
263 | } | |
264 | ||
1da177e4 | 265 | |
db0bb7ba | 266 | d_instantiate(dentry, inode); |
db0bb7ba CH |
267 | return -error; |
268 | ||
269 | out_cleanup_inode: | |
8f112e3b | 270 | xfs_cleanup_inode(dir, inode, dentry); |
db0bb7ba CH |
271 | out_free_acl: |
272 | if (default_acl) | |
273 | _ACL_FREE(default_acl); | |
1da177e4 LT |
274 | return -error; |
275 | } | |
276 | ||
277 | STATIC int | |
416c6d5b | 278 | xfs_vn_create( |
1da177e4 LT |
279 | struct inode *dir, |
280 | struct dentry *dentry, | |
281 | int mode, | |
282 | struct nameidata *nd) | |
283 | { | |
416c6d5b | 284 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
285 | } |
286 | ||
287 | STATIC int | |
416c6d5b | 288 | xfs_vn_mkdir( |
1da177e4 LT |
289 | struct inode *dir, |
290 | struct dentry *dentry, | |
291 | int mode) | |
292 | { | |
416c6d5b | 293 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
294 | } |
295 | ||
296 | STATIC struct dentry * | |
416c6d5b | 297 | xfs_vn_lookup( |
1da177e4 LT |
298 | struct inode *dir, |
299 | struct dentry *dentry, | |
300 | struct nameidata *nd) | |
301 | { | |
ef1f5e7a | 302 | struct xfs_inode *cip; |
556b8b16 | 303 | struct xfs_name name; |
1da177e4 LT |
304 | int error; |
305 | ||
306 | if (dentry->d_name.len >= MAXNAMELEN) | |
307 | return ERR_PTR(-ENAMETOOLONG); | |
308 | ||
556b8b16 | 309 | xfs_dentry_to_name(&name, dentry); |
384f3ced | 310 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 311 | if (unlikely(error)) { |
1da177e4 LT |
312 | if (unlikely(error != ENOENT)) |
313 | return ERR_PTR(-error); | |
314 | d_add(dentry, NULL); | |
315 | return NULL; | |
316 | } | |
317 | ||
01651646 | 318 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
319 | } |
320 | ||
384f3ced BN |
321 | STATIC struct dentry * |
322 | xfs_vn_ci_lookup( | |
323 | struct inode *dir, | |
324 | struct dentry *dentry, | |
325 | struct nameidata *nd) | |
326 | { | |
327 | struct xfs_inode *ip; | |
328 | struct xfs_name xname; | |
329 | struct xfs_name ci_name; | |
330 | struct qstr dname; | |
331 | int error; | |
332 | ||
333 | if (dentry->d_name.len >= MAXNAMELEN) | |
334 | return ERR_PTR(-ENAMETOOLONG); | |
335 | ||
336 | xfs_dentry_to_name(&xname, dentry); | |
337 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); | |
338 | if (unlikely(error)) { | |
339 | if (unlikely(error != ENOENT)) | |
340 | return ERR_PTR(-error); | |
866d5dc9 BN |
341 | /* |
342 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
343 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
344 | * with CI filesystems). | |
345 | */ | |
384f3ced BN |
346 | return NULL; |
347 | } | |
348 | ||
349 | /* if exact match, just splice and exit */ | |
350 | if (!ci_name.name) | |
01651646 | 351 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
352 | |
353 | /* else case-insensitive match... */ | |
354 | dname.name = ci_name.name; | |
355 | dname.len = ci_name.len; | |
e45b590b | 356 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
357 | kmem_free(ci_name.name); |
358 | return dentry; | |
359 | } | |
360 | ||
1da177e4 | 361 | STATIC int |
416c6d5b | 362 | xfs_vn_link( |
1da177e4 LT |
363 | struct dentry *old_dentry, |
364 | struct inode *dir, | |
365 | struct dentry *dentry) | |
366 | { | |
d9424b3c | 367 | struct inode *inode = old_dentry->d_inode; |
556b8b16 | 368 | struct xfs_name name; |
1da177e4 LT |
369 | int error; |
370 | ||
556b8b16 | 371 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 372 | |
556b8b16 | 373 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 374 | if (unlikely(error)) |
a3da7896 | 375 | return -error; |
a3da7896 | 376 | |
d9424b3c | 377 | atomic_inc(&inode->i_count); |
a3da7896 CH |
378 | d_instantiate(dentry, inode); |
379 | return 0; | |
1da177e4 LT |
380 | } |
381 | ||
382 | STATIC int | |
416c6d5b | 383 | xfs_vn_unlink( |
1da177e4 LT |
384 | struct inode *dir, |
385 | struct dentry *dentry) | |
386 | { | |
556b8b16 | 387 | struct xfs_name name; |
1da177e4 LT |
388 | int error; |
389 | ||
556b8b16 | 390 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 391 | |
e5700704 CH |
392 | error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); |
393 | if (error) | |
394 | return error; | |
395 | ||
396 | /* | |
397 | * With unlink, the VFS makes the dentry "negative": no inode, | |
398 | * but still hashed. This is incompatible with case-insensitive | |
399 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
400 | */ | |
401 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
402 | d_invalidate(dentry); | |
403 | return 0; | |
1da177e4 LT |
404 | } |
405 | ||
406 | STATIC int | |
416c6d5b | 407 | xfs_vn_symlink( |
1da177e4 LT |
408 | struct inode *dir, |
409 | struct dentry *dentry, | |
410 | const char *symname) | |
411 | { | |
3937be5b CH |
412 | struct inode *inode; |
413 | struct xfs_inode *cip = NULL; | |
556b8b16 | 414 | struct xfs_name name; |
1da177e4 | 415 | int error; |
3e5daf05 | 416 | mode_t mode; |
1da177e4 | 417 | |
3e5daf05 | 418 | mode = S_IFLNK | |
ce3b0f8d | 419 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
556b8b16 | 420 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 421 | |
556b8b16 | 422 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL); |
3937be5b CH |
423 | if (unlikely(error)) |
424 | goto out; | |
425 | ||
01651646 | 426 | inode = VFS_I(cip); |
3937be5b CH |
427 | |
428 | error = xfs_init_security(inode, dir); | |
429 | if (unlikely(error)) | |
430 | goto out_cleanup_inode; | |
431 | ||
432 | d_instantiate(dentry, inode); | |
3937be5b CH |
433 | return 0; |
434 | ||
435 | out_cleanup_inode: | |
8f112e3b | 436 | xfs_cleanup_inode(dir, inode, dentry); |
3937be5b | 437 | out: |
1da177e4 LT |
438 | return -error; |
439 | } | |
440 | ||
1da177e4 | 441 | STATIC int |
416c6d5b | 442 | xfs_vn_rename( |
1da177e4 LT |
443 | struct inode *odir, |
444 | struct dentry *odentry, | |
445 | struct inode *ndir, | |
446 | struct dentry *ndentry) | |
447 | { | |
448 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
449 | struct xfs_name oname; |
450 | struct xfs_name nname; | |
1da177e4 | 451 | |
556b8b16 BN |
452 | xfs_dentry_to_name(&oname, odentry); |
453 | xfs_dentry_to_name(&nname, ndentry); | |
454 | ||
e5700704 | 455 | return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
cfa853e4 CH |
456 | XFS_I(ndir), &nname, new_inode ? |
457 | XFS_I(new_inode) : NULL); | |
1da177e4 LT |
458 | } |
459 | ||
460 | /* | |
461 | * careful here - this function can get called recursively, so | |
462 | * we need to be very careful about how much stack we use. | |
463 | * uio is kmalloced for this reason... | |
464 | */ | |
008b150a | 465 | STATIC void * |
416c6d5b | 466 | xfs_vn_follow_link( |
1da177e4 LT |
467 | struct dentry *dentry, |
468 | struct nameidata *nd) | |
469 | { | |
1da177e4 | 470 | char *link; |
804c83c3 | 471 | int error = -ENOMEM; |
1da177e4 | 472 | |
f52720ca | 473 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
474 | if (!link) |
475 | goto out_err; | |
1da177e4 | 476 | |
739bfb2a | 477 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
478 | if (unlikely(error)) |
479 | goto out_kfree; | |
1da177e4 LT |
480 | |
481 | nd_set_link(nd, link); | |
008b150a | 482 | return NULL; |
804c83c3 CH |
483 | |
484 | out_kfree: | |
485 | kfree(link); | |
486 | out_err: | |
487 | nd_set_link(nd, ERR_PTR(error)); | |
488 | return NULL; | |
1da177e4 LT |
489 | } |
490 | ||
cde410a9 | 491 | STATIC void |
416c6d5b | 492 | xfs_vn_put_link( |
cde410a9 NS |
493 | struct dentry *dentry, |
494 | struct nameidata *nd, | |
495 | void *p) | |
1da177e4 | 496 | { |
cde410a9 NS |
497 | char *s = nd_get_link(nd); |
498 | ||
1da177e4 LT |
499 | if (!IS_ERR(s)) |
500 | kfree(s); | |
501 | } | |
502 | ||
503 | #ifdef CONFIG_XFS_POSIX_ACL | |
4576758d CH |
504 | STATIC int |
505 | xfs_check_acl( | |
506 | struct inode *inode, | |
507 | int mask) | |
508 | { | |
509 | struct xfs_inode *ip = XFS_I(inode); | |
510 | int error; | |
511 | ||
512 | xfs_itrace_entry(ip); | |
513 | ||
514 | if (XFS_IFORK_Q(ip)) { | |
515 | error = xfs_acl_iaccess(ip, mask, NULL); | |
516 | if (error != -1) | |
517 | return -error; | |
518 | } | |
519 | ||
520 | return -EAGAIN; | |
521 | } | |
522 | ||
1da177e4 | 523 | STATIC int |
416c6d5b | 524 | xfs_vn_permission( |
4576758d | 525 | struct inode *inode, |
e6305c43 | 526 | int mask) |
1da177e4 | 527 | { |
4576758d | 528 | return generic_permission(inode, mask, xfs_check_acl); |
1da177e4 LT |
529 | } |
530 | #else | |
416c6d5b | 531 | #define xfs_vn_permission NULL |
1da177e4 LT |
532 | #endif |
533 | ||
534 | STATIC int | |
416c6d5b | 535 | xfs_vn_getattr( |
c43f4087 CH |
536 | struct vfsmount *mnt, |
537 | struct dentry *dentry, | |
538 | struct kstat *stat) | |
1da177e4 | 539 | { |
c43f4087 CH |
540 | struct inode *inode = dentry->d_inode; |
541 | struct xfs_inode *ip = XFS_I(inode); | |
542 | struct xfs_mount *mp = ip->i_mount; | |
543 | ||
544 | xfs_itrace_entry(ip); | |
545 | ||
546 | if (XFS_FORCED_SHUTDOWN(mp)) | |
547 | return XFS_ERROR(EIO); | |
548 | ||
549 | stat->size = XFS_ISIZE(ip); | |
550 | stat->dev = inode->i_sb->s_dev; | |
551 | stat->mode = ip->i_d.di_mode; | |
552 | stat->nlink = ip->i_d.di_nlink; | |
553 | stat->uid = ip->i_d.di_uid; | |
554 | stat->gid = ip->i_d.di_gid; | |
555 | stat->ino = ip->i_ino; | |
556 | #if XFS_BIG_INUMS | |
557 | stat->ino += mp->m_inoadd; | |
558 | #endif | |
559 | stat->atime = inode->i_atime; | |
560 | stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
561 | stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
562 | stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
563 | stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
564 | stat->blocks = | |
565 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
566 | ||
567 | ||
568 | switch (inode->i_mode & S_IFMT) { | |
569 | case S_IFBLK: | |
570 | case S_IFCHR: | |
571 | stat->blksize = BLKDEV_IOSIZE; | |
572 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
573 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
574 | break; | |
575 | default: | |
71ddabb9 | 576 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
577 | /* |
578 | * If the file blocks are being allocated from a | |
579 | * realtime volume, then return the inode's realtime | |
580 | * extent size or the realtime volume's extent size. | |
581 | */ | |
582 | stat->blksize = | |
583 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
584 | } else | |
585 | stat->blksize = xfs_preferred_iosize(mp); | |
586 | stat->rdev = 0; | |
587 | break; | |
69e23b9a | 588 | } |
c43f4087 CH |
589 | |
590 | return 0; | |
1da177e4 LT |
591 | } |
592 | ||
593 | STATIC int | |
416c6d5b | 594 | xfs_vn_setattr( |
1da177e4 | 595 | struct dentry *dentry, |
0f285c8a | 596 | struct iattr *iattr) |
1da177e4 | 597 | { |
ea5a3dc8 | 598 | return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0); |
1da177e4 LT |
599 | } |
600 | ||
d87dd636 DC |
601 | /* |
602 | * block_truncate_page can return an error, but we can't propagate it | |
603 | * at all here. Leave a complaint + stack trace in the syslog because | |
604 | * this could be bad. If it is bad, we need to propagate the error further. | |
605 | */ | |
1da177e4 | 606 | STATIC void |
416c6d5b | 607 | xfs_vn_truncate( |
1da177e4 LT |
608 | struct inode *inode) |
609 | { | |
d87dd636 DC |
610 | int error; |
611 | error = block_truncate_page(inode->i_mapping, inode->i_size, | |
612 | xfs_get_blocks); | |
613 | WARN_ON(error); | |
1da177e4 LT |
614 | } |
615 | ||
3ed65264 DC |
616 | STATIC long |
617 | xfs_vn_fallocate( | |
618 | struct inode *inode, | |
619 | int mode, | |
620 | loff_t offset, | |
621 | loff_t len) | |
622 | { | |
623 | long error; | |
624 | loff_t new_size = 0; | |
625 | xfs_flock64_t bf; | |
626 | xfs_inode_t *ip = XFS_I(inode); | |
627 | ||
628 | /* preallocation on directories not yet supported */ | |
629 | error = -ENODEV; | |
630 | if (S_ISDIR(inode->i_mode)) | |
631 | goto out_error; | |
632 | ||
633 | bf.l_whence = 0; | |
634 | bf.l_start = offset; | |
635 | bf.l_len = len; | |
636 | ||
637 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
638 | error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, | |
ea5a3dc8 | 639 | 0, XFS_ATTR_NOLOCK); |
3ed65264 DC |
640 | if (!error && !(mode & FALLOC_FL_KEEP_SIZE) && |
641 | offset + len > i_size_read(inode)) | |
642 | new_size = offset + len; | |
643 | ||
644 | /* Change file size if needed */ | |
645 | if (new_size) { | |
0f285c8a | 646 | struct iattr iattr; |
3ed65264 | 647 | |
0f285c8a CH |
648 | iattr.ia_valid = ATTR_SIZE; |
649 | iattr.ia_size = new_size; | |
ea5a3dc8 | 650 | error = xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK); |
3ed65264 DC |
651 | } |
652 | ||
653 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
654 | out_error: | |
655 | return error; | |
656 | } | |
1da177e4 | 657 | |
f35642e2 ES |
658 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
659 | ||
660 | /* | |
661 | * Call fiemap helper to fill in user data. | |
662 | * Returns positive errors to xfs_getbmap. | |
663 | */ | |
664 | STATIC int | |
665 | xfs_fiemap_format( | |
666 | void **arg, | |
667 | struct getbmapx *bmv, | |
668 | int *full) | |
669 | { | |
670 | int error; | |
671 | struct fiemap_extent_info *fieinfo = *arg; | |
672 | u32 fiemap_flags = 0; | |
673 | u64 logical, physical, length; | |
674 | ||
675 | /* Do nothing for a hole */ | |
676 | if (bmv->bmv_block == -1LL) | |
677 | return 0; | |
678 | ||
679 | logical = BBTOB(bmv->bmv_offset); | |
680 | physical = BBTOB(bmv->bmv_block); | |
681 | length = BBTOB(bmv->bmv_length); | |
682 | ||
683 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) | |
684 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; | |
685 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { | |
686 | fiemap_flags |= FIEMAP_EXTENT_DELALLOC; | |
687 | physical = 0; /* no block yet */ | |
688 | } | |
689 | if (bmv->bmv_oflags & BMV_OF_LAST) | |
690 | fiemap_flags |= FIEMAP_EXTENT_LAST; | |
691 | ||
692 | error = fiemap_fill_next_extent(fieinfo, logical, physical, | |
693 | length, fiemap_flags); | |
694 | if (error > 0) { | |
695 | error = 0; | |
696 | *full = 1; /* user array now full */ | |
697 | } | |
698 | ||
699 | return -error; | |
700 | } | |
701 | ||
702 | STATIC int | |
703 | xfs_vn_fiemap( | |
704 | struct inode *inode, | |
705 | struct fiemap_extent_info *fieinfo, | |
706 | u64 start, | |
707 | u64 length) | |
708 | { | |
709 | xfs_inode_t *ip = XFS_I(inode); | |
710 | struct getbmapx bm; | |
711 | int error; | |
712 | ||
713 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); | |
714 | if (error) | |
715 | return error; | |
716 | ||
717 | /* Set up bmap header for xfs internal routine */ | |
718 | bm.bmv_offset = BTOBB(start); | |
719 | /* Special case for whole file */ | |
720 | if (length == FIEMAP_MAX_OFFSET) | |
721 | bm.bmv_length = -1LL; | |
722 | else | |
723 | bm.bmv_length = BTOBB(length); | |
724 | ||
725 | /* our formatter will tell xfs_getbmap when to stop. */ | |
726 | bm.bmv_count = MAXEXTNUM; | |
727 | bm.bmv_iflags = BMV_IF_PREALLOC; | |
728 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) | |
729 | bm.bmv_iflags |= BMV_IF_ATTRFORK; | |
730 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) | |
731 | bm.bmv_iflags |= BMV_IF_DELALLOC; | |
732 | ||
733 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); | |
734 | if (error) | |
735 | return -error; | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
41be8bed | 740 | static const struct inode_operations xfs_inode_operations = { |
416c6d5b NS |
741 | .permission = xfs_vn_permission, |
742 | .truncate = xfs_vn_truncate, | |
743 | .getattr = xfs_vn_getattr, | |
744 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
745 | .setxattr = generic_setxattr, |
746 | .getxattr = generic_getxattr, | |
747 | .removexattr = generic_removexattr, | |
416c6d5b | 748 | .listxattr = xfs_vn_listxattr, |
3ed65264 | 749 | .fallocate = xfs_vn_fallocate, |
f35642e2 | 750 | .fiemap = xfs_vn_fiemap, |
1da177e4 LT |
751 | }; |
752 | ||
41be8bed | 753 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
754 | .create = xfs_vn_create, |
755 | .lookup = xfs_vn_lookup, | |
756 | .link = xfs_vn_link, | |
757 | .unlink = xfs_vn_unlink, | |
758 | .symlink = xfs_vn_symlink, | |
759 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
760 | /* |
761 | * Yes, XFS uses the same method for rmdir and unlink. | |
762 | * | |
763 | * There are some subtile differences deeper in the code, | |
764 | * but we use S_ISDIR to check for those. | |
765 | */ | |
766 | .rmdir = xfs_vn_unlink, | |
416c6d5b NS |
767 | .mknod = xfs_vn_mknod, |
768 | .rename = xfs_vn_rename, | |
769 | .permission = xfs_vn_permission, | |
770 | .getattr = xfs_vn_getattr, | |
771 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
772 | .setxattr = generic_setxattr, |
773 | .getxattr = generic_getxattr, | |
774 | .removexattr = generic_removexattr, | |
416c6d5b | 775 | .listxattr = xfs_vn_listxattr, |
1da177e4 LT |
776 | }; |
777 | ||
41be8bed | 778 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
779 | .create = xfs_vn_create, |
780 | .lookup = xfs_vn_ci_lookup, | |
781 | .link = xfs_vn_link, | |
782 | .unlink = xfs_vn_unlink, | |
783 | .symlink = xfs_vn_symlink, | |
784 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
785 | /* |
786 | * Yes, XFS uses the same method for rmdir and unlink. | |
787 | * | |
788 | * There are some subtile differences deeper in the code, | |
789 | * but we use S_ISDIR to check for those. | |
790 | */ | |
791 | .rmdir = xfs_vn_unlink, | |
384f3ced BN |
792 | .mknod = xfs_vn_mknod, |
793 | .rename = xfs_vn_rename, | |
794 | .permission = xfs_vn_permission, | |
795 | .getattr = xfs_vn_getattr, | |
796 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
797 | .setxattr = generic_setxattr, |
798 | .getxattr = generic_getxattr, | |
799 | .removexattr = generic_removexattr, | |
384f3ced | 800 | .listxattr = xfs_vn_listxattr, |
384f3ced BN |
801 | }; |
802 | ||
41be8bed | 803 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 804 | .readlink = generic_readlink, |
416c6d5b NS |
805 | .follow_link = xfs_vn_follow_link, |
806 | .put_link = xfs_vn_put_link, | |
807 | .permission = xfs_vn_permission, | |
808 | .getattr = xfs_vn_getattr, | |
809 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
810 | .setxattr = generic_setxattr, |
811 | .getxattr = generic_getxattr, | |
812 | .removexattr = generic_removexattr, | |
416c6d5b | 813 | .listxattr = xfs_vn_listxattr, |
1da177e4 | 814 | }; |
41be8bed CH |
815 | |
816 | STATIC void | |
817 | xfs_diflags_to_iflags( | |
818 | struct inode *inode, | |
819 | struct xfs_inode *ip) | |
820 | { | |
821 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
822 | inode->i_flags |= S_IMMUTABLE; | |
823 | else | |
824 | inode->i_flags &= ~S_IMMUTABLE; | |
825 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
826 | inode->i_flags |= S_APPEND; | |
827 | else | |
828 | inode->i_flags &= ~S_APPEND; | |
829 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
830 | inode->i_flags |= S_SYNC; | |
831 | else | |
832 | inode->i_flags &= ~S_SYNC; | |
833 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
834 | inode->i_flags |= S_NOATIME; | |
835 | else | |
836 | inode->i_flags &= ~S_NOATIME; | |
837 | } | |
838 | ||
839 | /* | |
840 | * Initialize the Linux inode, set up the operation vectors and | |
841 | * unlock the inode. | |
842 | * | |
843 | * When reading existing inodes from disk this is called directly | |
844 | * from xfs_iget, when creating a new inode it is called from | |
845 | * xfs_ialloc after setting up the inode. | |
bf904248 DC |
846 | * |
847 | * We are always called with an uninitialised linux inode here. | |
848 | * We need to initialise the necessary fields and take a reference | |
849 | * on it. | |
41be8bed CH |
850 | */ |
851 | void | |
852 | xfs_setup_inode( | |
853 | struct xfs_inode *ip) | |
854 | { | |
bf904248 DC |
855 | struct inode *inode = &ip->i_vnode; |
856 | ||
857 | inode->i_ino = ip->i_ino; | |
858 | inode->i_state = I_NEW|I_LOCK; | |
859 | inode_add_to_lists(ip->i_mount->m_super, inode); | |
41be8bed CH |
860 | |
861 | inode->i_mode = ip->i_d.di_mode; | |
862 | inode->i_nlink = ip->i_d.di_nlink; | |
863 | inode->i_uid = ip->i_d.di_uid; | |
864 | inode->i_gid = ip->i_d.di_gid; | |
865 | ||
866 | switch (inode->i_mode & S_IFMT) { | |
867 | case S_IFBLK: | |
868 | case S_IFCHR: | |
869 | inode->i_rdev = | |
870 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
871 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
872 | break; | |
873 | default: | |
874 | inode->i_rdev = 0; | |
875 | break; | |
876 | } | |
877 | ||
878 | inode->i_generation = ip->i_d.di_gen; | |
879 | i_size_write(inode, ip->i_d.di_size); | |
880 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
881 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
882 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
883 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
884 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
885 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
886 | xfs_diflags_to_iflags(inode, ip); | |
41be8bed CH |
887 | |
888 | switch (inode->i_mode & S_IFMT) { | |
889 | case S_IFREG: | |
890 | inode->i_op = &xfs_inode_operations; | |
891 | inode->i_fop = &xfs_file_operations; | |
892 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
893 | break; | |
894 | case S_IFDIR: | |
895 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
896 | inode->i_op = &xfs_dir_ci_inode_operations; | |
897 | else | |
898 | inode->i_op = &xfs_dir_inode_operations; | |
899 | inode->i_fop = &xfs_dir_file_operations; | |
900 | break; | |
901 | case S_IFLNK: | |
902 | inode->i_op = &xfs_symlink_inode_operations; | |
903 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) | |
904 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
905 | break; | |
906 | default: | |
907 | inode->i_op = &xfs_inode_operations; | |
908 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
909 | break; | |
910 | } | |
911 | ||
912 | xfs_iflags_clear(ip, XFS_INEW); | |
913 | barrier(); | |
914 | ||
915 | unlock_new_inode(inode); | |
916 | } |