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