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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" | |
ef14f0c1 | 20 | #include "xfs_acl.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_dir2.h" |
28 | #include "xfs_alloc.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_quota.h" | |
31 | #include "xfs_mount.h" | |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 | 35 | #include "xfs_dir2_sf.h" |
a844f451 | 36 | #include "xfs_attr_sf.h" |
1da177e4 LT |
37 | #include "xfs_dinode.h" |
38 | #include "xfs_inode.h" | |
39 | #include "xfs_bmap.h" | |
a844f451 NS |
40 | #include "xfs_btree.h" |
41 | #include "xfs_ialloc.h" | |
1da177e4 LT |
42 | #include "xfs_rtalloc.h" |
43 | #include "xfs_error.h" | |
44 | #include "xfs_itable.h" | |
45 | #include "xfs_rw.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" |
0b1b213f | 50 | #include "xfs_trace.h" |
1da177e4 | 51 | |
16f7e0fe | 52 | #include <linux/capability.h> |
1da177e4 LT |
53 | #include <linux/xattr.h> |
54 | #include <linux/namei.h> | |
ef14f0c1 | 55 | #include <linux/posix_acl.h> |
446ada4a | 56 | #include <linux/security.h> |
3ed65264 | 57 | #include <linux/falloc.h> |
f35642e2 | 58 | #include <linux/fiemap.h> |
5a0e3ad6 | 59 | #include <linux/slab.h> |
1da177e4 | 60 | |
42fe2b1f | 61 | /* |
f9581b14 CH |
62 | * Bring the timestamps in the XFS inode uptodate. |
63 | * | |
64 | * Used before writing the inode to disk. | |
42fe2b1f CH |
65 | */ |
66 | void | |
f9581b14 | 67 | xfs_synchronize_times( |
42fe2b1f CH |
68 | xfs_inode_t *ip) |
69 | { | |
01651646 | 70 | struct inode *inode = VFS_I(ip); |
42fe2b1f | 71 | |
f9581b14 CH |
72 | ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; |
73 | ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; | |
74 | ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec; | |
75 | ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec; | |
76 | ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec; | |
77 | ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec; | |
42fe2b1f CH |
78 | } |
79 | ||
5d51eff4 | 80 | /* |
bf904248 | 81 | * If the linux inode is valid, mark it dirty. |
5d51eff4 DC |
82 | * Used when commiting a dirty inode into a transaction so that |
83 | * the inode will get written back by the linux code | |
84 | */ | |
85 | void | |
86 | xfs_mark_inode_dirty_sync( | |
87 | xfs_inode_t *ip) | |
88 | { | |
01651646 | 89 | struct inode *inode = VFS_I(ip); |
5d51eff4 | 90 | |
bf904248 | 91 | if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR))) |
af048193 | 92 | mark_inode_dirty_sync(inode); |
5d51eff4 DC |
93 | } |
94 | ||
66d834ea CH |
95 | void |
96 | xfs_mark_inode_dirty( | |
97 | xfs_inode_t *ip) | |
98 | { | |
99 | struct inode *inode = VFS_I(ip); | |
100 | ||
101 | if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR))) | |
102 | mark_inode_dirty(inode); | |
103 | } | |
104 | ||
4aeb664c NS |
105 | /* |
106 | * Change the requested timestamp in the given inode. | |
107 | * We don't lock across timestamp updates, and we don't log them but | |
108 | * we do record the fact that there is dirty information in core. | |
4aeb664c NS |
109 | */ |
110 | void | |
111 | xfs_ichgtime( | |
112 | xfs_inode_t *ip, | |
113 | int flags) | |
114 | { | |
e4f75291 | 115 | struct inode *inode = VFS_I(ip); |
4aeb664c | 116 | timespec_t tv; |
8e5975c8 | 117 | int sync_it = 0; |
4aeb664c | 118 | |
8e5975c8 CH |
119 | tv = current_fs_time(inode->i_sb); |
120 | ||
121 | if ((flags & XFS_ICHGTIME_MOD) && | |
122 | !timespec_equal(&inode->i_mtime, &tv)) { | |
4aeb664c | 123 | inode->i_mtime = tv; |
8e5975c8 | 124 | sync_it = 1; |
4aeb664c | 125 | } |
8e5975c8 CH |
126 | if ((flags & XFS_ICHGTIME_CHG) && |
127 | !timespec_equal(&inode->i_ctime, &tv)) { | |
4aeb664c | 128 | inode->i_ctime = tv; |
8e5975c8 | 129 | sync_it = 1; |
4aeb664c NS |
130 | } |
131 | ||
132 | /* | |
f9581b14 CH |
133 | * Update complete - now make sure everyone knows that the inode |
134 | * is dirty. | |
4aeb664c | 135 | */ |
f9581b14 | 136 | if (sync_it) |
94b97e39 | 137 | xfs_mark_inode_dirty_sync(ip); |
4aeb664c NS |
138 | } |
139 | ||
446ada4a NS |
140 | /* |
141 | * Hook in SELinux. This is not quite correct yet, what we really need | |
142 | * here (as we do for default ACLs) is a mechanism by which creation of | |
143 | * these attrs can be journalled at inode creation time (along with the | |
144 | * inode, of course, such that log replay can't cause these to be lost). | |
145 | */ | |
146 | STATIC int | |
416c6d5b | 147 | xfs_init_security( |
af048193 | 148 | struct inode *inode, |
446ada4a NS |
149 | struct inode *dir) |
150 | { | |
af048193 | 151 | struct xfs_inode *ip = XFS_I(inode); |
446ada4a NS |
152 | size_t length; |
153 | void *value; | |
a9273ca5 | 154 | unsigned char *name; |
446ada4a NS |
155 | int error; |
156 | ||
a9273ca5 | 157 | error = security_inode_init_security(inode, dir, (char **)&name, |
af048193 | 158 | &value, &length); |
446ada4a NS |
159 | if (error) { |
160 | if (error == -EOPNOTSUPP) | |
161 | return 0; | |
162 | return -error; | |
163 | } | |
164 | ||
af048193 | 165 | error = xfs_attr_set(ip, name, value, length, ATTR_SECURE); |
446ada4a NS |
166 | |
167 | kfree(name); | |
168 | kfree(value); | |
169 | return error; | |
170 | } | |
171 | ||
556b8b16 BN |
172 | static void |
173 | xfs_dentry_to_name( | |
174 | struct xfs_name *namep, | |
175 | struct dentry *dentry) | |
176 | { | |
177 | namep->name = dentry->d_name.name; | |
178 | namep->len = dentry->d_name.len; | |
179 | } | |
180 | ||
7989cb8e | 181 | STATIC void |
416c6d5b | 182 | xfs_cleanup_inode( |
739bfb2a | 183 | struct inode *dir, |
af048193 | 184 | struct inode *inode, |
8f112e3b | 185 | struct dentry *dentry) |
3a69c7dc | 186 | { |
556b8b16 | 187 | struct xfs_name teardown; |
3a69c7dc YL |
188 | |
189 | /* Oh, the horror. | |
220b5284 | 190 | * If we can't add the ACL or we fail in |
416c6d5b | 191 | * xfs_init_security we must back out. |
3a69c7dc YL |
192 | * ENOSPC can hit here, among other things. |
193 | */ | |
556b8b16 | 194 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc | 195 | |
8f112e3b | 196 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
af048193 | 197 | iput(inode); |
3a69c7dc YL |
198 | } |
199 | ||
1da177e4 | 200 | STATIC int |
416c6d5b | 201 | xfs_vn_mknod( |
1da177e4 LT |
202 | struct inode *dir, |
203 | struct dentry *dentry, | |
204 | int mode, | |
205 | dev_t rdev) | |
206 | { | |
db0bb7ba | 207 | struct inode *inode; |
979ebab1 | 208 | struct xfs_inode *ip = NULL; |
ef14f0c1 | 209 | struct posix_acl *default_acl = NULL; |
556b8b16 | 210 | struct xfs_name name; |
1da177e4 LT |
211 | int error; |
212 | ||
213 | /* | |
214 | * Irix uses Missed'em'V split, but doesn't want to see | |
215 | * the upper 5 bits of (14bit) major. | |
216 | */ | |
517b5e8c CH |
217 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
218 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
219 | return -EINVAL; | |
220 | rdev = sysv_encode_dev(rdev); | |
221 | } else { | |
222 | rdev = 0; | |
223 | } | |
1da177e4 | 224 | |
ef14f0c1 CH |
225 | if (IS_POSIXACL(dir)) { |
226 | default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT); | |
227 | if (IS_ERR(default_acl)) | |
228 | return -PTR_ERR(default_acl); | |
1da177e4 | 229 | |
e83f1eb6 CH |
230 | if (!default_acl) |
231 | mode &= ~current_umask(); | |
ef14f0c1 | 232 | } |
1da177e4 | 233 | |
517b5e8c CH |
234 | xfs_dentry_to_name(&name, dentry); |
235 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL); | |
db0bb7ba CH |
236 | if (unlikely(error)) |
237 | goto out_free_acl; | |
446ada4a | 238 | |
01651646 | 239 | inode = VFS_I(ip); |
979ebab1 CH |
240 | |
241 | error = xfs_init_security(inode, dir); | |
db0bb7ba CH |
242 | if (unlikely(error)) |
243 | goto out_cleanup_inode; | |
244 | ||
245 | if (default_acl) { | |
ef14f0c1 | 246 | error = -xfs_inherit_acl(inode, default_acl); |
db0bb7ba CH |
247 | if (unlikely(error)) |
248 | goto out_cleanup_inode; | |
ef14f0c1 | 249 | posix_acl_release(default_acl); |
1da177e4 LT |
250 | } |
251 | ||
1da177e4 | 252 | |
db0bb7ba | 253 | d_instantiate(dentry, inode); |
db0bb7ba CH |
254 | return -error; |
255 | ||
256 | out_cleanup_inode: | |
8f112e3b | 257 | xfs_cleanup_inode(dir, inode, dentry); |
db0bb7ba | 258 | out_free_acl: |
ef14f0c1 | 259 | posix_acl_release(default_acl); |
1da177e4 LT |
260 | return -error; |
261 | } | |
262 | ||
263 | STATIC int | |
416c6d5b | 264 | xfs_vn_create( |
1da177e4 LT |
265 | struct inode *dir, |
266 | struct dentry *dentry, | |
267 | int mode, | |
268 | struct nameidata *nd) | |
269 | { | |
416c6d5b | 270 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
271 | } |
272 | ||
273 | STATIC int | |
416c6d5b | 274 | xfs_vn_mkdir( |
1da177e4 LT |
275 | struct inode *dir, |
276 | struct dentry *dentry, | |
277 | int mode) | |
278 | { | |
416c6d5b | 279 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
280 | } |
281 | ||
282 | STATIC struct dentry * | |
416c6d5b | 283 | xfs_vn_lookup( |
1da177e4 LT |
284 | struct inode *dir, |
285 | struct dentry *dentry, | |
286 | struct nameidata *nd) | |
287 | { | |
ef1f5e7a | 288 | struct xfs_inode *cip; |
556b8b16 | 289 | struct xfs_name name; |
1da177e4 LT |
290 | int error; |
291 | ||
292 | if (dentry->d_name.len >= MAXNAMELEN) | |
293 | return ERR_PTR(-ENAMETOOLONG); | |
294 | ||
556b8b16 | 295 | xfs_dentry_to_name(&name, dentry); |
384f3ced | 296 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 297 | if (unlikely(error)) { |
1da177e4 LT |
298 | if (unlikely(error != ENOENT)) |
299 | return ERR_PTR(-error); | |
300 | d_add(dentry, NULL); | |
301 | return NULL; | |
302 | } | |
303 | ||
01651646 | 304 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
305 | } |
306 | ||
384f3ced BN |
307 | STATIC struct dentry * |
308 | xfs_vn_ci_lookup( | |
309 | struct inode *dir, | |
310 | struct dentry *dentry, | |
311 | struct nameidata *nd) | |
312 | { | |
313 | struct xfs_inode *ip; | |
314 | struct xfs_name xname; | |
315 | struct xfs_name ci_name; | |
316 | struct qstr dname; | |
317 | int error; | |
318 | ||
319 | if (dentry->d_name.len >= MAXNAMELEN) | |
320 | return ERR_PTR(-ENAMETOOLONG); | |
321 | ||
322 | xfs_dentry_to_name(&xname, dentry); | |
323 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); | |
324 | if (unlikely(error)) { | |
325 | if (unlikely(error != ENOENT)) | |
326 | return ERR_PTR(-error); | |
866d5dc9 BN |
327 | /* |
328 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
329 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
330 | * with CI filesystems). | |
331 | */ | |
384f3ced BN |
332 | return NULL; |
333 | } | |
334 | ||
335 | /* if exact match, just splice and exit */ | |
336 | if (!ci_name.name) | |
01651646 | 337 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
338 | |
339 | /* else case-insensitive match... */ | |
340 | dname.name = ci_name.name; | |
341 | dname.len = ci_name.len; | |
e45b590b | 342 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
343 | kmem_free(ci_name.name); |
344 | return dentry; | |
345 | } | |
346 | ||
1da177e4 | 347 | STATIC int |
416c6d5b | 348 | xfs_vn_link( |
1da177e4 LT |
349 | struct dentry *old_dentry, |
350 | struct inode *dir, | |
351 | struct dentry *dentry) | |
352 | { | |
d9424b3c | 353 | struct inode *inode = old_dentry->d_inode; |
556b8b16 | 354 | struct xfs_name name; |
1da177e4 LT |
355 | int error; |
356 | ||
556b8b16 | 357 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 358 | |
556b8b16 | 359 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 360 | if (unlikely(error)) |
a3da7896 | 361 | return -error; |
a3da7896 | 362 | |
d9424b3c | 363 | atomic_inc(&inode->i_count); |
a3da7896 CH |
364 | d_instantiate(dentry, inode); |
365 | return 0; | |
1da177e4 LT |
366 | } |
367 | ||
368 | STATIC int | |
416c6d5b | 369 | xfs_vn_unlink( |
1da177e4 LT |
370 | struct inode *dir, |
371 | struct dentry *dentry) | |
372 | { | |
556b8b16 | 373 | struct xfs_name name; |
1da177e4 LT |
374 | int error; |
375 | ||
556b8b16 | 376 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 377 | |
e5700704 CH |
378 | error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); |
379 | if (error) | |
380 | return error; | |
381 | ||
382 | /* | |
383 | * With unlink, the VFS makes the dentry "negative": no inode, | |
384 | * but still hashed. This is incompatible with case-insensitive | |
385 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
386 | */ | |
387 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
388 | d_invalidate(dentry); | |
389 | return 0; | |
1da177e4 LT |
390 | } |
391 | ||
392 | STATIC int | |
416c6d5b | 393 | xfs_vn_symlink( |
1da177e4 LT |
394 | struct inode *dir, |
395 | struct dentry *dentry, | |
396 | const char *symname) | |
397 | { | |
3937be5b CH |
398 | struct inode *inode; |
399 | struct xfs_inode *cip = NULL; | |
556b8b16 | 400 | struct xfs_name name; |
1da177e4 | 401 | int error; |
3e5daf05 | 402 | mode_t mode; |
1da177e4 | 403 | |
3e5daf05 | 404 | mode = S_IFLNK | |
ce3b0f8d | 405 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
556b8b16 | 406 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 407 | |
556b8b16 | 408 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL); |
3937be5b CH |
409 | if (unlikely(error)) |
410 | goto out; | |
411 | ||
01651646 | 412 | inode = VFS_I(cip); |
3937be5b CH |
413 | |
414 | error = xfs_init_security(inode, dir); | |
415 | if (unlikely(error)) | |
416 | goto out_cleanup_inode; | |
417 | ||
418 | d_instantiate(dentry, inode); | |
3937be5b CH |
419 | return 0; |
420 | ||
421 | out_cleanup_inode: | |
8f112e3b | 422 | xfs_cleanup_inode(dir, inode, dentry); |
3937be5b | 423 | out: |
1da177e4 LT |
424 | return -error; |
425 | } | |
426 | ||
1da177e4 | 427 | STATIC int |
416c6d5b | 428 | xfs_vn_rename( |
1da177e4 LT |
429 | struct inode *odir, |
430 | struct dentry *odentry, | |
431 | struct inode *ndir, | |
432 | struct dentry *ndentry) | |
433 | { | |
434 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
435 | struct xfs_name oname; |
436 | struct xfs_name nname; | |
1da177e4 | 437 | |
556b8b16 BN |
438 | xfs_dentry_to_name(&oname, odentry); |
439 | xfs_dentry_to_name(&nname, ndentry); | |
440 | ||
e5700704 | 441 | return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
cfa853e4 CH |
442 | XFS_I(ndir), &nname, new_inode ? |
443 | XFS_I(new_inode) : NULL); | |
1da177e4 LT |
444 | } |
445 | ||
446 | /* | |
447 | * careful here - this function can get called recursively, so | |
448 | * we need to be very careful about how much stack we use. | |
449 | * uio is kmalloced for this reason... | |
450 | */ | |
008b150a | 451 | STATIC void * |
416c6d5b | 452 | xfs_vn_follow_link( |
1da177e4 LT |
453 | struct dentry *dentry, |
454 | struct nameidata *nd) | |
455 | { | |
1da177e4 | 456 | char *link; |
804c83c3 | 457 | int error = -ENOMEM; |
1da177e4 | 458 | |
f52720ca | 459 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
460 | if (!link) |
461 | goto out_err; | |
1da177e4 | 462 | |
739bfb2a | 463 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
464 | if (unlikely(error)) |
465 | goto out_kfree; | |
1da177e4 LT |
466 | |
467 | nd_set_link(nd, link); | |
008b150a | 468 | return NULL; |
804c83c3 CH |
469 | |
470 | out_kfree: | |
471 | kfree(link); | |
472 | out_err: | |
473 | nd_set_link(nd, ERR_PTR(error)); | |
474 | return NULL; | |
1da177e4 LT |
475 | } |
476 | ||
cde410a9 | 477 | STATIC void |
416c6d5b | 478 | xfs_vn_put_link( |
cde410a9 NS |
479 | struct dentry *dentry, |
480 | struct nameidata *nd, | |
481 | void *p) | |
1da177e4 | 482 | { |
cde410a9 NS |
483 | char *s = nd_get_link(nd); |
484 | ||
1da177e4 LT |
485 | if (!IS_ERR(s)) |
486 | kfree(s); | |
487 | } | |
488 | ||
1da177e4 | 489 | STATIC int |
416c6d5b | 490 | xfs_vn_getattr( |
c43f4087 CH |
491 | struct vfsmount *mnt, |
492 | struct dentry *dentry, | |
493 | struct kstat *stat) | |
1da177e4 | 494 | { |
c43f4087 CH |
495 | struct inode *inode = dentry->d_inode; |
496 | struct xfs_inode *ip = XFS_I(inode); | |
497 | struct xfs_mount *mp = ip->i_mount; | |
498 | ||
499 | xfs_itrace_entry(ip); | |
500 | ||
501 | if (XFS_FORCED_SHUTDOWN(mp)) | |
502 | return XFS_ERROR(EIO); | |
503 | ||
504 | stat->size = XFS_ISIZE(ip); | |
505 | stat->dev = inode->i_sb->s_dev; | |
506 | stat->mode = ip->i_d.di_mode; | |
507 | stat->nlink = ip->i_d.di_nlink; | |
508 | stat->uid = ip->i_d.di_uid; | |
509 | stat->gid = ip->i_d.di_gid; | |
510 | stat->ino = ip->i_ino; | |
c43f4087 | 511 | stat->atime = inode->i_atime; |
f9581b14 CH |
512 | stat->mtime = inode->i_mtime; |
513 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
514 | stat->blocks = |
515 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
516 | ||
517 | ||
518 | switch (inode->i_mode & S_IFMT) { | |
519 | case S_IFBLK: | |
520 | case S_IFCHR: | |
521 | stat->blksize = BLKDEV_IOSIZE; | |
522 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
523 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
524 | break; | |
525 | default: | |
71ddabb9 | 526 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
527 | /* |
528 | * If the file blocks are being allocated from a | |
529 | * realtime volume, then return the inode's realtime | |
530 | * extent size or the realtime volume's extent size. | |
531 | */ | |
532 | stat->blksize = | |
533 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
534 | } else | |
535 | stat->blksize = xfs_preferred_iosize(mp); | |
536 | stat->rdev = 0; | |
537 | break; | |
69e23b9a | 538 | } |
c43f4087 CH |
539 | |
540 | return 0; | |
1da177e4 LT |
541 | } |
542 | ||
543 | STATIC int | |
416c6d5b | 544 | xfs_vn_setattr( |
1da177e4 | 545 | struct dentry *dentry, |
0f285c8a | 546 | struct iattr *iattr) |
1da177e4 | 547 | { |
ea5a3dc8 | 548 | return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0); |
1da177e4 LT |
549 | } |
550 | ||
d87dd636 DC |
551 | /* |
552 | * block_truncate_page can return an error, but we can't propagate it | |
553 | * at all here. Leave a complaint + stack trace in the syslog because | |
554 | * this could be bad. If it is bad, we need to propagate the error further. | |
555 | */ | |
1da177e4 | 556 | STATIC void |
416c6d5b | 557 | xfs_vn_truncate( |
1da177e4 LT |
558 | struct inode *inode) |
559 | { | |
d87dd636 DC |
560 | int error; |
561 | error = block_truncate_page(inode->i_mapping, inode->i_size, | |
562 | xfs_get_blocks); | |
563 | WARN_ON(error); | |
1da177e4 LT |
564 | } |
565 | ||
3ed65264 DC |
566 | STATIC long |
567 | xfs_vn_fallocate( | |
568 | struct inode *inode, | |
569 | int mode, | |
570 | loff_t offset, | |
571 | loff_t len) | |
572 | { | |
573 | long error; | |
574 | loff_t new_size = 0; | |
575 | xfs_flock64_t bf; | |
576 | xfs_inode_t *ip = XFS_I(inode); | |
577 | ||
578 | /* preallocation on directories not yet supported */ | |
579 | error = -ENODEV; | |
580 | if (S_ISDIR(inode->i_mode)) | |
581 | goto out_error; | |
582 | ||
583 | bf.l_whence = 0; | |
584 | bf.l_start = offset; | |
585 | bf.l_len = len; | |
586 | ||
587 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
44a743f6 JG |
588 | error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, |
589 | 0, XFS_ATTR_NOLOCK); | |
3ed65264 DC |
590 | if (!error && !(mode & FALLOC_FL_KEEP_SIZE) && |
591 | offset + len > i_size_read(inode)) | |
592 | new_size = offset + len; | |
593 | ||
594 | /* Change file size if needed */ | |
595 | if (new_size) { | |
0f285c8a | 596 | struct iattr iattr; |
3ed65264 | 597 | |
0f285c8a CH |
598 | iattr.ia_valid = ATTR_SIZE; |
599 | iattr.ia_size = new_size; | |
44a743f6 | 600 | error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK); |
3ed65264 DC |
601 | } |
602 | ||
603 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
604 | out_error: | |
605 | return error; | |
606 | } | |
1da177e4 | 607 | |
f35642e2 ES |
608 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
609 | ||
610 | /* | |
611 | * Call fiemap helper to fill in user data. | |
612 | * Returns positive errors to xfs_getbmap. | |
613 | */ | |
614 | STATIC int | |
615 | xfs_fiemap_format( | |
616 | void **arg, | |
617 | struct getbmapx *bmv, | |
618 | int *full) | |
619 | { | |
620 | int error; | |
621 | struct fiemap_extent_info *fieinfo = *arg; | |
622 | u32 fiemap_flags = 0; | |
623 | u64 logical, physical, length; | |
624 | ||
625 | /* Do nothing for a hole */ | |
626 | if (bmv->bmv_block == -1LL) | |
627 | return 0; | |
628 | ||
629 | logical = BBTOB(bmv->bmv_offset); | |
630 | physical = BBTOB(bmv->bmv_block); | |
631 | length = BBTOB(bmv->bmv_length); | |
632 | ||
633 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) | |
634 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; | |
635 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { | |
636 | fiemap_flags |= FIEMAP_EXTENT_DELALLOC; | |
637 | physical = 0; /* no block yet */ | |
638 | } | |
639 | if (bmv->bmv_oflags & BMV_OF_LAST) | |
640 | fiemap_flags |= FIEMAP_EXTENT_LAST; | |
641 | ||
642 | error = fiemap_fill_next_extent(fieinfo, logical, physical, | |
643 | length, fiemap_flags); | |
644 | if (error > 0) { | |
645 | error = 0; | |
646 | *full = 1; /* user array now full */ | |
647 | } | |
648 | ||
649 | return -error; | |
650 | } | |
651 | ||
652 | STATIC int | |
653 | xfs_vn_fiemap( | |
654 | struct inode *inode, | |
655 | struct fiemap_extent_info *fieinfo, | |
656 | u64 start, | |
657 | u64 length) | |
658 | { | |
659 | xfs_inode_t *ip = XFS_I(inode); | |
660 | struct getbmapx bm; | |
661 | int error; | |
662 | ||
663 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); | |
664 | if (error) | |
665 | return error; | |
666 | ||
667 | /* Set up bmap header for xfs internal routine */ | |
668 | bm.bmv_offset = BTOBB(start); | |
669 | /* Special case for whole file */ | |
670 | if (length == FIEMAP_MAX_OFFSET) | |
671 | bm.bmv_length = -1LL; | |
672 | else | |
673 | bm.bmv_length = BTOBB(length); | |
674 | ||
97db39a1 ES |
675 | /* We add one because in getbmap world count includes the header */ |
676 | bm.bmv_count = fieinfo->fi_extents_max + 1; | |
f35642e2 ES |
677 | bm.bmv_iflags = BMV_IF_PREALLOC; |
678 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) | |
679 | bm.bmv_iflags |= BMV_IF_ATTRFORK; | |
680 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) | |
681 | bm.bmv_iflags |= BMV_IF_DELALLOC; | |
682 | ||
683 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); | |
684 | if (error) | |
685 | return -error; | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
41be8bed | 690 | static const struct inode_operations xfs_inode_operations = { |
18f4c644 | 691 | .check_acl = xfs_check_acl, |
416c6d5b NS |
692 | .truncate = xfs_vn_truncate, |
693 | .getattr = xfs_vn_getattr, | |
694 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
695 | .setxattr = generic_setxattr, |
696 | .getxattr = generic_getxattr, | |
697 | .removexattr = generic_removexattr, | |
416c6d5b | 698 | .listxattr = xfs_vn_listxattr, |
3ed65264 | 699 | .fallocate = xfs_vn_fallocate, |
f35642e2 | 700 | .fiemap = xfs_vn_fiemap, |
1da177e4 LT |
701 | }; |
702 | ||
41be8bed | 703 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
704 | .create = xfs_vn_create, |
705 | .lookup = xfs_vn_lookup, | |
706 | .link = xfs_vn_link, | |
707 | .unlink = xfs_vn_unlink, | |
708 | .symlink = xfs_vn_symlink, | |
709 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
710 | /* |
711 | * Yes, XFS uses the same method for rmdir and unlink. | |
712 | * | |
713 | * There are some subtile differences deeper in the code, | |
714 | * but we use S_ISDIR to check for those. | |
715 | */ | |
716 | .rmdir = xfs_vn_unlink, | |
416c6d5b NS |
717 | .mknod = xfs_vn_mknod, |
718 | .rename = xfs_vn_rename, | |
18f4c644 | 719 | .check_acl = xfs_check_acl, |
416c6d5b NS |
720 | .getattr = xfs_vn_getattr, |
721 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
722 | .setxattr = generic_setxattr, |
723 | .getxattr = generic_getxattr, | |
724 | .removexattr = generic_removexattr, | |
416c6d5b | 725 | .listxattr = xfs_vn_listxattr, |
1da177e4 LT |
726 | }; |
727 | ||
41be8bed | 728 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
729 | .create = xfs_vn_create, |
730 | .lookup = xfs_vn_ci_lookup, | |
731 | .link = xfs_vn_link, | |
732 | .unlink = xfs_vn_unlink, | |
733 | .symlink = xfs_vn_symlink, | |
734 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
735 | /* |
736 | * Yes, XFS uses the same method for rmdir and unlink. | |
737 | * | |
738 | * There are some subtile differences deeper in the code, | |
739 | * but we use S_ISDIR to check for those. | |
740 | */ | |
741 | .rmdir = xfs_vn_unlink, | |
384f3ced BN |
742 | .mknod = xfs_vn_mknod, |
743 | .rename = xfs_vn_rename, | |
18f4c644 | 744 | .check_acl = xfs_check_acl, |
384f3ced BN |
745 | .getattr = xfs_vn_getattr, |
746 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
747 | .setxattr = generic_setxattr, |
748 | .getxattr = generic_getxattr, | |
749 | .removexattr = generic_removexattr, | |
384f3ced | 750 | .listxattr = xfs_vn_listxattr, |
384f3ced BN |
751 | }; |
752 | ||
41be8bed | 753 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 754 | .readlink = generic_readlink, |
416c6d5b NS |
755 | .follow_link = xfs_vn_follow_link, |
756 | .put_link = xfs_vn_put_link, | |
18f4c644 | 757 | .check_acl = xfs_check_acl, |
416c6d5b NS |
758 | .getattr = xfs_vn_getattr, |
759 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
760 | .setxattr = generic_setxattr, |
761 | .getxattr = generic_getxattr, | |
762 | .removexattr = generic_removexattr, | |
416c6d5b | 763 | .listxattr = xfs_vn_listxattr, |
1da177e4 | 764 | }; |
41be8bed CH |
765 | |
766 | STATIC void | |
767 | xfs_diflags_to_iflags( | |
768 | struct inode *inode, | |
769 | struct xfs_inode *ip) | |
770 | { | |
771 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
772 | inode->i_flags |= S_IMMUTABLE; | |
773 | else | |
774 | inode->i_flags &= ~S_IMMUTABLE; | |
775 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
776 | inode->i_flags |= S_APPEND; | |
777 | else | |
778 | inode->i_flags &= ~S_APPEND; | |
779 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
780 | inode->i_flags |= S_SYNC; | |
781 | else | |
782 | inode->i_flags &= ~S_SYNC; | |
783 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
784 | inode->i_flags |= S_NOATIME; | |
785 | else | |
786 | inode->i_flags &= ~S_NOATIME; | |
787 | } | |
788 | ||
789 | /* | |
790 | * Initialize the Linux inode, set up the operation vectors and | |
791 | * unlock the inode. | |
792 | * | |
793 | * When reading existing inodes from disk this is called directly | |
794 | * from xfs_iget, when creating a new inode it is called from | |
795 | * xfs_ialloc after setting up the inode. | |
bf904248 DC |
796 | * |
797 | * We are always called with an uninitialised linux inode here. | |
798 | * We need to initialise the necessary fields and take a reference | |
799 | * on it. | |
41be8bed CH |
800 | */ |
801 | void | |
802 | xfs_setup_inode( | |
803 | struct xfs_inode *ip) | |
804 | { | |
bf904248 DC |
805 | struct inode *inode = &ip->i_vnode; |
806 | ||
807 | inode->i_ino = ip->i_ino; | |
eaff8079 | 808 | inode->i_state = I_NEW; |
bf904248 | 809 | inode_add_to_lists(ip->i_mount->m_super, inode); |
41be8bed CH |
810 | |
811 | inode->i_mode = ip->i_d.di_mode; | |
812 | inode->i_nlink = ip->i_d.di_nlink; | |
813 | inode->i_uid = ip->i_d.di_uid; | |
814 | inode->i_gid = ip->i_d.di_gid; | |
815 | ||
816 | switch (inode->i_mode & S_IFMT) { | |
817 | case S_IFBLK: | |
818 | case S_IFCHR: | |
819 | inode->i_rdev = | |
820 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
821 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
822 | break; | |
823 | default: | |
824 | inode->i_rdev = 0; | |
825 | break; | |
826 | } | |
827 | ||
828 | inode->i_generation = ip->i_d.di_gen; | |
829 | i_size_write(inode, ip->i_d.di_size); | |
830 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
831 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
832 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
833 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
834 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
835 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
836 | xfs_diflags_to_iflags(inode, ip); | |
41be8bed CH |
837 | |
838 | switch (inode->i_mode & S_IFMT) { | |
839 | case S_IFREG: | |
840 | inode->i_op = &xfs_inode_operations; | |
841 | inode->i_fop = &xfs_file_operations; | |
842 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
843 | break; | |
844 | case S_IFDIR: | |
845 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
846 | inode->i_op = &xfs_dir_ci_inode_operations; | |
847 | else | |
848 | inode->i_op = &xfs_dir_inode_operations; | |
849 | inode->i_fop = &xfs_dir_file_operations; | |
850 | break; | |
851 | case S_IFLNK: | |
852 | inode->i_op = &xfs_symlink_inode_operations; | |
853 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) | |
854 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
855 | break; | |
856 | default: | |
857 | inode->i_op = &xfs_inode_operations; | |
858 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
859 | break; | |
860 | } | |
861 | ||
862 | xfs_iflags_clear(ip, XFS_INEW); | |
863 | barrier(); | |
864 | ||
865 | unlock_new_inode(inode); | |
866 | } |