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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 | 27 | #include "xfs_alloc.h" |
1da177e4 LT |
28 | #include "xfs_quota.h" |
29 | #include "xfs_mount.h" | |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
31 | #include "xfs_dinode.h" |
32 | #include "xfs_inode.h" | |
33 | #include "xfs_bmap.h" | |
1da177e4 LT |
34 | #include "xfs_rtalloc.h" |
35 | #include "xfs_error.h" | |
36 | #include "xfs_itable.h" | |
37 | #include "xfs_rw.h" | |
1da177e4 LT |
38 | #include "xfs_attr.h" |
39 | #include "xfs_buf_item.h" | |
40 | #include "xfs_utils.h" | |
739bfb2a | 41 | #include "xfs_vnodeops.h" |
0b1b213f | 42 | #include "xfs_trace.h" |
1da177e4 | 43 | |
16f7e0fe | 44 | #include <linux/capability.h> |
1da177e4 LT |
45 | #include <linux/xattr.h> |
46 | #include <linux/namei.h> | |
ef14f0c1 | 47 | #include <linux/posix_acl.h> |
446ada4a | 48 | #include <linux/security.h> |
3ed65264 | 49 | #include <linux/falloc.h> |
f35642e2 | 50 | #include <linux/fiemap.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
1da177e4 | 52 | |
42fe2b1f | 53 | /* |
f9581b14 CH |
54 | * Bring the timestamps in the XFS inode uptodate. |
55 | * | |
56 | * Used before writing the inode to disk. | |
42fe2b1f CH |
57 | */ |
58 | void | |
f9581b14 | 59 | xfs_synchronize_times( |
42fe2b1f CH |
60 | xfs_inode_t *ip) |
61 | { | |
01651646 | 62 | struct inode *inode = VFS_I(ip); |
42fe2b1f | 63 | |
f9581b14 CH |
64 | ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; |
65 | ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; | |
66 | ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec; | |
67 | ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec; | |
68 | ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec; | |
69 | ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec; | |
42fe2b1f CH |
70 | } |
71 | ||
5d51eff4 | 72 | /* |
bf904248 | 73 | * If the linux inode is valid, mark it dirty. |
5d51eff4 DC |
74 | * Used when commiting a dirty inode into a transaction so that |
75 | * the inode will get written back by the linux code | |
76 | */ | |
77 | void | |
78 | xfs_mark_inode_dirty_sync( | |
79 | xfs_inode_t *ip) | |
80 | { | |
01651646 | 81 | struct inode *inode = VFS_I(ip); |
5d51eff4 | 82 | |
a4ffdde6 | 83 | if (!(inode->i_state & (I_WILL_FREE|I_FREEING))) |
af048193 | 84 | mark_inode_dirty_sync(inode); |
5d51eff4 DC |
85 | } |
86 | ||
66d834ea CH |
87 | void |
88 | xfs_mark_inode_dirty( | |
89 | xfs_inode_t *ip) | |
90 | { | |
91 | struct inode *inode = VFS_I(ip); | |
92 | ||
a4ffdde6 | 93 | if (!(inode->i_state & (I_WILL_FREE|I_FREEING))) |
66d834ea CH |
94 | mark_inode_dirty(inode); |
95 | } | |
96 | ||
4aeb664c NS |
97 | /* |
98 | * Change the requested timestamp in the given inode. | |
99 | * We don't lock across timestamp updates, and we don't log them but | |
100 | * we do record the fact that there is dirty information in core. | |
4aeb664c NS |
101 | */ |
102 | void | |
103 | xfs_ichgtime( | |
104 | xfs_inode_t *ip, | |
105 | int flags) | |
106 | { | |
e4f75291 | 107 | struct inode *inode = VFS_I(ip); |
4aeb664c | 108 | timespec_t tv; |
8e5975c8 | 109 | int sync_it = 0; |
4aeb664c | 110 | |
8e5975c8 CH |
111 | tv = current_fs_time(inode->i_sb); |
112 | ||
113 | if ((flags & XFS_ICHGTIME_MOD) && | |
114 | !timespec_equal(&inode->i_mtime, &tv)) { | |
4aeb664c | 115 | inode->i_mtime = tv; |
8e5975c8 | 116 | sync_it = 1; |
4aeb664c | 117 | } |
8e5975c8 CH |
118 | if ((flags & XFS_ICHGTIME_CHG) && |
119 | !timespec_equal(&inode->i_ctime, &tv)) { | |
4aeb664c | 120 | inode->i_ctime = tv; |
8e5975c8 | 121 | sync_it = 1; |
4aeb664c NS |
122 | } |
123 | ||
124 | /* | |
f9581b14 CH |
125 | * Update complete - now make sure everyone knows that the inode |
126 | * is dirty. | |
4aeb664c | 127 | */ |
f9581b14 | 128 | if (sync_it) |
94b97e39 | 129 | xfs_mark_inode_dirty_sync(ip); |
4aeb664c NS |
130 | } |
131 | ||
446ada4a NS |
132 | /* |
133 | * Hook in SELinux. This is not quite correct yet, what we really need | |
134 | * here (as we do for default ACLs) is a mechanism by which creation of | |
135 | * these attrs can be journalled at inode creation time (along with the | |
136 | * inode, of course, such that log replay can't cause these to be lost). | |
137 | */ | |
138 | STATIC int | |
416c6d5b | 139 | xfs_init_security( |
af048193 | 140 | struct inode *inode, |
446ada4a NS |
141 | struct inode *dir) |
142 | { | |
af048193 | 143 | struct xfs_inode *ip = XFS_I(inode); |
446ada4a NS |
144 | size_t length; |
145 | void *value; | |
a9273ca5 | 146 | unsigned char *name; |
446ada4a NS |
147 | int error; |
148 | ||
a9273ca5 | 149 | error = security_inode_init_security(inode, dir, (char **)&name, |
af048193 | 150 | &value, &length); |
446ada4a NS |
151 | if (error) { |
152 | if (error == -EOPNOTSUPP) | |
153 | return 0; | |
154 | return -error; | |
155 | } | |
156 | ||
af048193 | 157 | error = xfs_attr_set(ip, name, value, length, ATTR_SECURE); |
446ada4a NS |
158 | |
159 | kfree(name); | |
160 | kfree(value); | |
161 | return error; | |
162 | } | |
163 | ||
556b8b16 BN |
164 | static void |
165 | xfs_dentry_to_name( | |
166 | struct xfs_name *namep, | |
167 | struct dentry *dentry) | |
168 | { | |
169 | namep->name = dentry->d_name.name; | |
170 | namep->len = dentry->d_name.len; | |
171 | } | |
172 | ||
7989cb8e | 173 | STATIC void |
416c6d5b | 174 | xfs_cleanup_inode( |
739bfb2a | 175 | struct inode *dir, |
af048193 | 176 | struct inode *inode, |
8f112e3b | 177 | struct dentry *dentry) |
3a69c7dc | 178 | { |
556b8b16 | 179 | struct xfs_name teardown; |
3a69c7dc YL |
180 | |
181 | /* Oh, the horror. | |
220b5284 | 182 | * If we can't add the ACL or we fail in |
416c6d5b | 183 | * xfs_init_security we must back out. |
3a69c7dc YL |
184 | * ENOSPC can hit here, among other things. |
185 | */ | |
556b8b16 | 186 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc | 187 | |
8f112e3b | 188 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
af048193 | 189 | iput(inode); |
3a69c7dc YL |
190 | } |
191 | ||
1da177e4 | 192 | STATIC int |
416c6d5b | 193 | xfs_vn_mknod( |
1da177e4 LT |
194 | struct inode *dir, |
195 | struct dentry *dentry, | |
196 | int mode, | |
197 | dev_t rdev) | |
198 | { | |
db0bb7ba | 199 | struct inode *inode; |
979ebab1 | 200 | struct xfs_inode *ip = NULL; |
ef14f0c1 | 201 | struct posix_acl *default_acl = NULL; |
556b8b16 | 202 | struct xfs_name name; |
1da177e4 LT |
203 | int error; |
204 | ||
205 | /* | |
206 | * Irix uses Missed'em'V split, but doesn't want to see | |
207 | * the upper 5 bits of (14bit) major. | |
208 | */ | |
517b5e8c CH |
209 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
210 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
211 | return -EINVAL; | |
212 | rdev = sysv_encode_dev(rdev); | |
213 | } else { | |
214 | rdev = 0; | |
215 | } | |
1da177e4 | 216 | |
ef14f0c1 CH |
217 | if (IS_POSIXACL(dir)) { |
218 | default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT); | |
219 | if (IS_ERR(default_acl)) | |
220 | return -PTR_ERR(default_acl); | |
1da177e4 | 221 | |
e83f1eb6 CH |
222 | if (!default_acl) |
223 | mode &= ~current_umask(); | |
ef14f0c1 | 224 | } |
1da177e4 | 225 | |
517b5e8c CH |
226 | xfs_dentry_to_name(&name, dentry); |
227 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL); | |
db0bb7ba CH |
228 | if (unlikely(error)) |
229 | goto out_free_acl; | |
446ada4a | 230 | |
01651646 | 231 | inode = VFS_I(ip); |
979ebab1 CH |
232 | |
233 | error = xfs_init_security(inode, dir); | |
db0bb7ba CH |
234 | if (unlikely(error)) |
235 | goto out_cleanup_inode; | |
236 | ||
237 | if (default_acl) { | |
ef14f0c1 | 238 | error = -xfs_inherit_acl(inode, default_acl); |
db0bb7ba CH |
239 | if (unlikely(error)) |
240 | goto out_cleanup_inode; | |
ef14f0c1 | 241 | posix_acl_release(default_acl); |
1da177e4 LT |
242 | } |
243 | ||
1da177e4 | 244 | |
db0bb7ba | 245 | d_instantiate(dentry, inode); |
db0bb7ba CH |
246 | return -error; |
247 | ||
248 | out_cleanup_inode: | |
8f112e3b | 249 | xfs_cleanup_inode(dir, inode, dentry); |
db0bb7ba | 250 | out_free_acl: |
ef14f0c1 | 251 | posix_acl_release(default_acl); |
1da177e4 LT |
252 | return -error; |
253 | } | |
254 | ||
255 | STATIC int | |
416c6d5b | 256 | xfs_vn_create( |
1da177e4 LT |
257 | struct inode *dir, |
258 | struct dentry *dentry, | |
259 | int mode, | |
260 | struct nameidata *nd) | |
261 | { | |
416c6d5b | 262 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
263 | } |
264 | ||
265 | STATIC int | |
416c6d5b | 266 | xfs_vn_mkdir( |
1da177e4 LT |
267 | struct inode *dir, |
268 | struct dentry *dentry, | |
269 | int mode) | |
270 | { | |
416c6d5b | 271 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
272 | } |
273 | ||
274 | STATIC struct dentry * | |
416c6d5b | 275 | xfs_vn_lookup( |
1da177e4 LT |
276 | struct inode *dir, |
277 | struct dentry *dentry, | |
278 | struct nameidata *nd) | |
279 | { | |
ef1f5e7a | 280 | struct xfs_inode *cip; |
556b8b16 | 281 | struct xfs_name name; |
1da177e4 LT |
282 | int error; |
283 | ||
284 | if (dentry->d_name.len >= MAXNAMELEN) | |
285 | return ERR_PTR(-ENAMETOOLONG); | |
286 | ||
556b8b16 | 287 | xfs_dentry_to_name(&name, dentry); |
384f3ced | 288 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 289 | if (unlikely(error)) { |
1da177e4 LT |
290 | if (unlikely(error != ENOENT)) |
291 | return ERR_PTR(-error); | |
292 | d_add(dentry, NULL); | |
293 | return NULL; | |
294 | } | |
295 | ||
01651646 | 296 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
297 | } |
298 | ||
384f3ced BN |
299 | STATIC struct dentry * |
300 | xfs_vn_ci_lookup( | |
301 | struct inode *dir, | |
302 | struct dentry *dentry, | |
303 | struct nameidata *nd) | |
304 | { | |
305 | struct xfs_inode *ip; | |
306 | struct xfs_name xname; | |
307 | struct xfs_name ci_name; | |
308 | struct qstr dname; | |
309 | int error; | |
310 | ||
311 | if (dentry->d_name.len >= MAXNAMELEN) | |
312 | return ERR_PTR(-ENAMETOOLONG); | |
313 | ||
314 | xfs_dentry_to_name(&xname, dentry); | |
315 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); | |
316 | if (unlikely(error)) { | |
317 | if (unlikely(error != ENOENT)) | |
318 | return ERR_PTR(-error); | |
866d5dc9 BN |
319 | /* |
320 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
321 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
322 | * with CI filesystems). | |
323 | */ | |
384f3ced BN |
324 | return NULL; |
325 | } | |
326 | ||
327 | /* if exact match, just splice and exit */ | |
328 | if (!ci_name.name) | |
01651646 | 329 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
330 | |
331 | /* else case-insensitive match... */ | |
332 | dname.name = ci_name.name; | |
333 | dname.len = ci_name.len; | |
e45b590b | 334 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
335 | kmem_free(ci_name.name); |
336 | return dentry; | |
337 | } | |
338 | ||
1da177e4 | 339 | STATIC int |
416c6d5b | 340 | xfs_vn_link( |
1da177e4 LT |
341 | struct dentry *old_dentry, |
342 | struct inode *dir, | |
343 | struct dentry *dentry) | |
344 | { | |
d9424b3c | 345 | struct inode *inode = old_dentry->d_inode; |
556b8b16 | 346 | struct xfs_name name; |
1da177e4 LT |
347 | int error; |
348 | ||
556b8b16 | 349 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 350 | |
556b8b16 | 351 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 352 | if (unlikely(error)) |
a3da7896 | 353 | return -error; |
a3da7896 | 354 | |
d9424b3c | 355 | atomic_inc(&inode->i_count); |
a3da7896 CH |
356 | d_instantiate(dentry, inode); |
357 | return 0; | |
1da177e4 LT |
358 | } |
359 | ||
360 | STATIC int | |
416c6d5b | 361 | xfs_vn_unlink( |
1da177e4 LT |
362 | struct inode *dir, |
363 | struct dentry *dentry) | |
364 | { | |
556b8b16 | 365 | struct xfs_name name; |
1da177e4 LT |
366 | int error; |
367 | ||
556b8b16 | 368 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 369 | |
e5700704 CH |
370 | error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); |
371 | if (error) | |
372 | return error; | |
373 | ||
374 | /* | |
375 | * With unlink, the VFS makes the dentry "negative": no inode, | |
376 | * but still hashed. This is incompatible with case-insensitive | |
377 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
378 | */ | |
379 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
380 | d_invalidate(dentry); | |
381 | return 0; | |
1da177e4 LT |
382 | } |
383 | ||
384 | STATIC int | |
416c6d5b | 385 | xfs_vn_symlink( |
1da177e4 LT |
386 | struct inode *dir, |
387 | struct dentry *dentry, | |
388 | const char *symname) | |
389 | { | |
3937be5b CH |
390 | struct inode *inode; |
391 | struct xfs_inode *cip = NULL; | |
556b8b16 | 392 | struct xfs_name name; |
1da177e4 | 393 | int error; |
3e5daf05 | 394 | mode_t mode; |
1da177e4 | 395 | |
3e5daf05 | 396 | mode = S_IFLNK | |
ce3b0f8d | 397 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
556b8b16 | 398 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 399 | |
556b8b16 | 400 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL); |
3937be5b CH |
401 | if (unlikely(error)) |
402 | goto out; | |
403 | ||
01651646 | 404 | inode = VFS_I(cip); |
3937be5b CH |
405 | |
406 | error = xfs_init_security(inode, dir); | |
407 | if (unlikely(error)) | |
408 | goto out_cleanup_inode; | |
409 | ||
410 | d_instantiate(dentry, inode); | |
3937be5b CH |
411 | return 0; |
412 | ||
413 | out_cleanup_inode: | |
8f112e3b | 414 | xfs_cleanup_inode(dir, inode, dentry); |
3937be5b | 415 | out: |
1da177e4 LT |
416 | return -error; |
417 | } | |
418 | ||
1da177e4 | 419 | STATIC int |
416c6d5b | 420 | xfs_vn_rename( |
1da177e4 LT |
421 | struct inode *odir, |
422 | struct dentry *odentry, | |
423 | struct inode *ndir, | |
424 | struct dentry *ndentry) | |
425 | { | |
426 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
427 | struct xfs_name oname; |
428 | struct xfs_name nname; | |
1da177e4 | 429 | |
556b8b16 BN |
430 | xfs_dentry_to_name(&oname, odentry); |
431 | xfs_dentry_to_name(&nname, ndentry); | |
432 | ||
e5700704 | 433 | return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
cfa853e4 CH |
434 | XFS_I(ndir), &nname, new_inode ? |
435 | XFS_I(new_inode) : NULL); | |
1da177e4 LT |
436 | } |
437 | ||
438 | /* | |
439 | * careful here - this function can get called recursively, so | |
440 | * we need to be very careful about how much stack we use. | |
441 | * uio is kmalloced for this reason... | |
442 | */ | |
008b150a | 443 | STATIC void * |
416c6d5b | 444 | xfs_vn_follow_link( |
1da177e4 LT |
445 | struct dentry *dentry, |
446 | struct nameidata *nd) | |
447 | { | |
1da177e4 | 448 | char *link; |
804c83c3 | 449 | int error = -ENOMEM; |
1da177e4 | 450 | |
f52720ca | 451 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
452 | if (!link) |
453 | goto out_err; | |
1da177e4 | 454 | |
739bfb2a | 455 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
456 | if (unlikely(error)) |
457 | goto out_kfree; | |
1da177e4 LT |
458 | |
459 | nd_set_link(nd, link); | |
008b150a | 460 | return NULL; |
804c83c3 CH |
461 | |
462 | out_kfree: | |
463 | kfree(link); | |
464 | out_err: | |
465 | nd_set_link(nd, ERR_PTR(error)); | |
466 | return NULL; | |
1da177e4 LT |
467 | } |
468 | ||
cde410a9 | 469 | STATIC void |
416c6d5b | 470 | xfs_vn_put_link( |
cde410a9 NS |
471 | struct dentry *dentry, |
472 | struct nameidata *nd, | |
473 | void *p) | |
1da177e4 | 474 | { |
cde410a9 NS |
475 | char *s = nd_get_link(nd); |
476 | ||
1da177e4 LT |
477 | if (!IS_ERR(s)) |
478 | kfree(s); | |
479 | } | |
480 | ||
1da177e4 | 481 | STATIC int |
416c6d5b | 482 | xfs_vn_getattr( |
c43f4087 CH |
483 | struct vfsmount *mnt, |
484 | struct dentry *dentry, | |
485 | struct kstat *stat) | |
1da177e4 | 486 | { |
c43f4087 CH |
487 | struct inode *inode = dentry->d_inode; |
488 | struct xfs_inode *ip = XFS_I(inode); | |
489 | struct xfs_mount *mp = ip->i_mount; | |
490 | ||
cca28fb8 | 491 | trace_xfs_getattr(ip); |
c43f4087 CH |
492 | |
493 | if (XFS_FORCED_SHUTDOWN(mp)) | |
494 | return XFS_ERROR(EIO); | |
495 | ||
496 | stat->size = XFS_ISIZE(ip); | |
497 | stat->dev = inode->i_sb->s_dev; | |
498 | stat->mode = ip->i_d.di_mode; | |
499 | stat->nlink = ip->i_d.di_nlink; | |
500 | stat->uid = ip->i_d.di_uid; | |
501 | stat->gid = ip->i_d.di_gid; | |
502 | stat->ino = ip->i_ino; | |
c43f4087 | 503 | stat->atime = inode->i_atime; |
f9581b14 CH |
504 | stat->mtime = inode->i_mtime; |
505 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
506 | stat->blocks = |
507 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
508 | ||
509 | ||
510 | switch (inode->i_mode & S_IFMT) { | |
511 | case S_IFBLK: | |
512 | case S_IFCHR: | |
513 | stat->blksize = BLKDEV_IOSIZE; | |
514 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
515 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
516 | break; | |
517 | default: | |
71ddabb9 | 518 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
519 | /* |
520 | * If the file blocks are being allocated from a | |
521 | * realtime volume, then return the inode's realtime | |
522 | * extent size or the realtime volume's extent size. | |
523 | */ | |
524 | stat->blksize = | |
525 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
526 | } else | |
527 | stat->blksize = xfs_preferred_iosize(mp); | |
528 | stat->rdev = 0; | |
529 | break; | |
69e23b9a | 530 | } |
c43f4087 CH |
531 | |
532 | return 0; | |
1da177e4 LT |
533 | } |
534 | ||
535 | STATIC int | |
416c6d5b | 536 | xfs_vn_setattr( |
1da177e4 | 537 | struct dentry *dentry, |
0f285c8a | 538 | struct iattr *iattr) |
1da177e4 | 539 | { |
ea5a3dc8 | 540 | return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0); |
1da177e4 LT |
541 | } |
542 | ||
3ed65264 DC |
543 | STATIC long |
544 | xfs_vn_fallocate( | |
545 | struct inode *inode, | |
546 | int mode, | |
547 | loff_t offset, | |
548 | loff_t len) | |
549 | { | |
550 | long error; | |
551 | loff_t new_size = 0; | |
552 | xfs_flock64_t bf; | |
553 | xfs_inode_t *ip = XFS_I(inode); | |
554 | ||
555 | /* preallocation on directories not yet supported */ | |
556 | error = -ENODEV; | |
557 | if (S_ISDIR(inode->i_mode)) | |
558 | goto out_error; | |
559 | ||
560 | bf.l_whence = 0; | |
561 | bf.l_start = offset; | |
562 | bf.l_len = len; | |
563 | ||
564 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
07f1a4f5 DC |
565 | |
566 | /* check the new inode size is valid before allocating */ | |
567 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
568 | offset + len > i_size_read(inode)) { | |
569 | new_size = offset + len; | |
570 | error = inode_newsize_ok(inode, new_size); | |
571 | if (error) | |
572 | goto out_unlock; | |
573 | } | |
574 | ||
44a743f6 JG |
575 | error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, |
576 | 0, XFS_ATTR_NOLOCK); | |
07f1a4f5 DC |
577 | if (error) |
578 | goto out_unlock; | |
3ed65264 DC |
579 | |
580 | /* Change file size if needed */ | |
581 | if (new_size) { | |
0f285c8a | 582 | struct iattr iattr; |
3ed65264 | 583 | |
0f285c8a CH |
584 | iattr.ia_valid = ATTR_SIZE; |
585 | iattr.ia_size = new_size; | |
44a743f6 | 586 | error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK); |
3ed65264 DC |
587 | } |
588 | ||
07f1a4f5 | 589 | out_unlock: |
3ed65264 DC |
590 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
591 | out_error: | |
592 | return error; | |
593 | } | |
1da177e4 | 594 | |
f35642e2 ES |
595 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
596 | ||
597 | /* | |
598 | * Call fiemap helper to fill in user data. | |
599 | * Returns positive errors to xfs_getbmap. | |
600 | */ | |
601 | STATIC int | |
602 | xfs_fiemap_format( | |
603 | void **arg, | |
604 | struct getbmapx *bmv, | |
605 | int *full) | |
606 | { | |
607 | int error; | |
608 | struct fiemap_extent_info *fieinfo = *arg; | |
609 | u32 fiemap_flags = 0; | |
610 | u64 logical, physical, length; | |
611 | ||
612 | /* Do nothing for a hole */ | |
613 | if (bmv->bmv_block == -1LL) | |
614 | return 0; | |
615 | ||
616 | logical = BBTOB(bmv->bmv_offset); | |
617 | physical = BBTOB(bmv->bmv_block); | |
618 | length = BBTOB(bmv->bmv_length); | |
619 | ||
620 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) | |
621 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; | |
622 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { | |
623 | fiemap_flags |= FIEMAP_EXTENT_DELALLOC; | |
624 | physical = 0; /* no block yet */ | |
625 | } | |
626 | if (bmv->bmv_oflags & BMV_OF_LAST) | |
627 | fiemap_flags |= FIEMAP_EXTENT_LAST; | |
628 | ||
629 | error = fiemap_fill_next_extent(fieinfo, logical, physical, | |
630 | length, fiemap_flags); | |
631 | if (error > 0) { | |
632 | error = 0; | |
633 | *full = 1; /* user array now full */ | |
634 | } | |
635 | ||
636 | return -error; | |
637 | } | |
638 | ||
639 | STATIC int | |
640 | xfs_vn_fiemap( | |
641 | struct inode *inode, | |
642 | struct fiemap_extent_info *fieinfo, | |
643 | u64 start, | |
644 | u64 length) | |
645 | { | |
646 | xfs_inode_t *ip = XFS_I(inode); | |
647 | struct getbmapx bm; | |
648 | int error; | |
649 | ||
650 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); | |
651 | if (error) | |
652 | return error; | |
653 | ||
654 | /* Set up bmap header for xfs internal routine */ | |
655 | bm.bmv_offset = BTOBB(start); | |
656 | /* Special case for whole file */ | |
657 | if (length == FIEMAP_MAX_OFFSET) | |
658 | bm.bmv_length = -1LL; | |
659 | else | |
660 | bm.bmv_length = BTOBB(length); | |
661 | ||
97db39a1 | 662 | /* We add one because in getbmap world count includes the header */ |
2d1ff3c7 TM |
663 | bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : |
664 | fieinfo->fi_extents_max + 1; | |
665 | bm.bmv_count = min_t(__s32, bm.bmv_count, | |
666 | (PAGE_SIZE * 16 / sizeof(struct getbmapx))); | |
9af25465 | 667 | bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; |
f35642e2 ES |
668 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) |
669 | bm.bmv_iflags |= BMV_IF_ATTRFORK; | |
670 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) | |
671 | bm.bmv_iflags |= BMV_IF_DELALLOC; | |
672 | ||
673 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); | |
674 | if (error) | |
675 | return -error; | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
41be8bed | 680 | static const struct inode_operations xfs_inode_operations = { |
18f4c644 | 681 | .check_acl = xfs_check_acl, |
416c6d5b NS |
682 | .getattr = xfs_vn_getattr, |
683 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
684 | .setxattr = generic_setxattr, |
685 | .getxattr = generic_getxattr, | |
686 | .removexattr = generic_removexattr, | |
416c6d5b | 687 | .listxattr = xfs_vn_listxattr, |
3ed65264 | 688 | .fallocate = xfs_vn_fallocate, |
f35642e2 | 689 | .fiemap = xfs_vn_fiemap, |
1da177e4 LT |
690 | }; |
691 | ||
41be8bed | 692 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
693 | .create = xfs_vn_create, |
694 | .lookup = xfs_vn_lookup, | |
695 | .link = xfs_vn_link, | |
696 | .unlink = xfs_vn_unlink, | |
697 | .symlink = xfs_vn_symlink, | |
698 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
699 | /* |
700 | * Yes, XFS uses the same method for rmdir and unlink. | |
701 | * | |
702 | * There are some subtile differences deeper in the code, | |
703 | * but we use S_ISDIR to check for those. | |
704 | */ | |
705 | .rmdir = xfs_vn_unlink, | |
416c6d5b NS |
706 | .mknod = xfs_vn_mknod, |
707 | .rename = xfs_vn_rename, | |
18f4c644 | 708 | .check_acl = xfs_check_acl, |
416c6d5b NS |
709 | .getattr = xfs_vn_getattr, |
710 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
711 | .setxattr = generic_setxattr, |
712 | .getxattr = generic_getxattr, | |
713 | .removexattr = generic_removexattr, | |
416c6d5b | 714 | .listxattr = xfs_vn_listxattr, |
1da177e4 LT |
715 | }; |
716 | ||
41be8bed | 717 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
718 | .create = xfs_vn_create, |
719 | .lookup = xfs_vn_ci_lookup, | |
720 | .link = xfs_vn_link, | |
721 | .unlink = xfs_vn_unlink, | |
722 | .symlink = xfs_vn_symlink, | |
723 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
724 | /* |
725 | * Yes, XFS uses the same method for rmdir and unlink. | |
726 | * | |
727 | * There are some subtile differences deeper in the code, | |
728 | * but we use S_ISDIR to check for those. | |
729 | */ | |
730 | .rmdir = xfs_vn_unlink, | |
384f3ced BN |
731 | .mknod = xfs_vn_mknod, |
732 | .rename = xfs_vn_rename, | |
18f4c644 | 733 | .check_acl = xfs_check_acl, |
384f3ced BN |
734 | .getattr = xfs_vn_getattr, |
735 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
736 | .setxattr = generic_setxattr, |
737 | .getxattr = generic_getxattr, | |
738 | .removexattr = generic_removexattr, | |
384f3ced | 739 | .listxattr = xfs_vn_listxattr, |
384f3ced BN |
740 | }; |
741 | ||
41be8bed | 742 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 743 | .readlink = generic_readlink, |
416c6d5b NS |
744 | .follow_link = xfs_vn_follow_link, |
745 | .put_link = xfs_vn_put_link, | |
18f4c644 | 746 | .check_acl = xfs_check_acl, |
416c6d5b NS |
747 | .getattr = xfs_vn_getattr, |
748 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
749 | .setxattr = generic_setxattr, |
750 | .getxattr = generic_getxattr, | |
751 | .removexattr = generic_removexattr, | |
416c6d5b | 752 | .listxattr = xfs_vn_listxattr, |
1da177e4 | 753 | }; |
41be8bed CH |
754 | |
755 | STATIC void | |
756 | xfs_diflags_to_iflags( | |
757 | struct inode *inode, | |
758 | struct xfs_inode *ip) | |
759 | { | |
760 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
761 | inode->i_flags |= S_IMMUTABLE; | |
762 | else | |
763 | inode->i_flags &= ~S_IMMUTABLE; | |
764 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
765 | inode->i_flags |= S_APPEND; | |
766 | else | |
767 | inode->i_flags &= ~S_APPEND; | |
768 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
769 | inode->i_flags |= S_SYNC; | |
770 | else | |
771 | inode->i_flags &= ~S_SYNC; | |
772 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
773 | inode->i_flags |= S_NOATIME; | |
774 | else | |
775 | inode->i_flags &= ~S_NOATIME; | |
776 | } | |
777 | ||
778 | /* | |
779 | * Initialize the Linux inode, set up the operation vectors and | |
780 | * unlock the inode. | |
781 | * | |
782 | * When reading existing inodes from disk this is called directly | |
783 | * from xfs_iget, when creating a new inode it is called from | |
784 | * xfs_ialloc after setting up the inode. | |
bf904248 DC |
785 | * |
786 | * We are always called with an uninitialised linux inode here. | |
787 | * We need to initialise the necessary fields and take a reference | |
788 | * on it. | |
41be8bed CH |
789 | */ |
790 | void | |
791 | xfs_setup_inode( | |
792 | struct xfs_inode *ip) | |
793 | { | |
bf904248 DC |
794 | struct inode *inode = &ip->i_vnode; |
795 | ||
796 | inode->i_ino = ip->i_ino; | |
eaff8079 | 797 | inode->i_state = I_NEW; |
bf904248 | 798 | inode_add_to_lists(ip->i_mount->m_super, inode); |
41be8bed CH |
799 | |
800 | inode->i_mode = ip->i_d.di_mode; | |
801 | inode->i_nlink = ip->i_d.di_nlink; | |
802 | inode->i_uid = ip->i_d.di_uid; | |
803 | inode->i_gid = ip->i_d.di_gid; | |
804 | ||
805 | switch (inode->i_mode & S_IFMT) { | |
806 | case S_IFBLK: | |
807 | case S_IFCHR: | |
808 | inode->i_rdev = | |
809 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
810 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
811 | break; | |
812 | default: | |
813 | inode->i_rdev = 0; | |
814 | break; | |
815 | } | |
816 | ||
817 | inode->i_generation = ip->i_d.di_gen; | |
818 | i_size_write(inode, ip->i_d.di_size); | |
819 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
820 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
821 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
822 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
823 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
824 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
825 | xfs_diflags_to_iflags(inode, ip); | |
41be8bed CH |
826 | |
827 | switch (inode->i_mode & S_IFMT) { | |
828 | case S_IFREG: | |
829 | inode->i_op = &xfs_inode_operations; | |
830 | inode->i_fop = &xfs_file_operations; | |
831 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
832 | break; | |
833 | case S_IFDIR: | |
834 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
835 | inode->i_op = &xfs_dir_ci_inode_operations; | |
836 | else | |
837 | inode->i_op = &xfs_dir_inode_operations; | |
838 | inode->i_fop = &xfs_dir_file_operations; | |
839 | break; | |
840 | case S_IFLNK: | |
841 | inode->i_op = &xfs_symlink_inode_operations; | |
842 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) | |
843 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
844 | break; | |
845 | default: | |
846 | inode->i_op = &xfs_inode_operations; | |
847 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
848 | break; | |
849 | } | |
850 | ||
851 | xfs_iflags_clear(ip, XFS_INEW); | |
852 | barrier(); | |
853 | ||
854 | unlock_new_inode(inode); | |
855 | } |