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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 | ||
446ada4a NS |
97 | /* |
98 | * Hook in SELinux. This is not quite correct yet, what we really need | |
99 | * here (as we do for default ACLs) is a mechanism by which creation of | |
100 | * these attrs can be journalled at inode creation time (along with the | |
101 | * inode, of course, such that log replay can't cause these to be lost). | |
102 | */ | |
103 | STATIC int | |
416c6d5b | 104 | xfs_init_security( |
af048193 | 105 | struct inode *inode, |
446ada4a NS |
106 | struct inode *dir) |
107 | { | |
af048193 | 108 | struct xfs_inode *ip = XFS_I(inode); |
446ada4a NS |
109 | size_t length; |
110 | void *value; | |
a9273ca5 | 111 | unsigned char *name; |
446ada4a NS |
112 | int error; |
113 | ||
a9273ca5 | 114 | error = security_inode_init_security(inode, dir, (char **)&name, |
af048193 | 115 | &value, &length); |
446ada4a NS |
116 | if (error) { |
117 | if (error == -EOPNOTSUPP) | |
118 | return 0; | |
119 | return -error; | |
120 | } | |
121 | ||
af048193 | 122 | error = xfs_attr_set(ip, name, value, length, ATTR_SECURE); |
446ada4a NS |
123 | |
124 | kfree(name); | |
125 | kfree(value); | |
126 | return error; | |
127 | } | |
128 | ||
556b8b16 BN |
129 | static void |
130 | xfs_dentry_to_name( | |
131 | struct xfs_name *namep, | |
132 | struct dentry *dentry) | |
133 | { | |
134 | namep->name = dentry->d_name.name; | |
135 | namep->len = dentry->d_name.len; | |
136 | } | |
137 | ||
7989cb8e | 138 | STATIC void |
416c6d5b | 139 | xfs_cleanup_inode( |
739bfb2a | 140 | struct inode *dir, |
af048193 | 141 | struct inode *inode, |
8f112e3b | 142 | struct dentry *dentry) |
3a69c7dc | 143 | { |
556b8b16 | 144 | struct xfs_name teardown; |
3a69c7dc YL |
145 | |
146 | /* Oh, the horror. | |
220b5284 | 147 | * If we can't add the ACL or we fail in |
416c6d5b | 148 | * xfs_init_security we must back out. |
3a69c7dc YL |
149 | * ENOSPC can hit here, among other things. |
150 | */ | |
556b8b16 | 151 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc | 152 | |
8f112e3b | 153 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
af048193 | 154 | iput(inode); |
3a69c7dc YL |
155 | } |
156 | ||
1da177e4 | 157 | STATIC int |
416c6d5b | 158 | xfs_vn_mknod( |
1da177e4 LT |
159 | struct inode *dir, |
160 | struct dentry *dentry, | |
161 | int mode, | |
162 | dev_t rdev) | |
163 | { | |
db0bb7ba | 164 | struct inode *inode; |
979ebab1 | 165 | struct xfs_inode *ip = NULL; |
ef14f0c1 | 166 | struct posix_acl *default_acl = NULL; |
556b8b16 | 167 | struct xfs_name name; |
1da177e4 LT |
168 | int error; |
169 | ||
170 | /* | |
171 | * Irix uses Missed'em'V split, but doesn't want to see | |
172 | * the upper 5 bits of (14bit) major. | |
173 | */ | |
517b5e8c CH |
174 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
175 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
176 | return -EINVAL; | |
177 | rdev = sysv_encode_dev(rdev); | |
178 | } else { | |
179 | rdev = 0; | |
180 | } | |
1da177e4 | 181 | |
ef14f0c1 CH |
182 | if (IS_POSIXACL(dir)) { |
183 | default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT); | |
184 | if (IS_ERR(default_acl)) | |
185 | return -PTR_ERR(default_acl); | |
1da177e4 | 186 | |
e83f1eb6 CH |
187 | if (!default_acl) |
188 | mode &= ~current_umask(); | |
ef14f0c1 | 189 | } |
1da177e4 | 190 | |
517b5e8c | 191 | xfs_dentry_to_name(&name, dentry); |
6c77b0ea | 192 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
db0bb7ba CH |
193 | if (unlikely(error)) |
194 | goto out_free_acl; | |
446ada4a | 195 | |
01651646 | 196 | inode = VFS_I(ip); |
979ebab1 CH |
197 | |
198 | error = xfs_init_security(inode, dir); | |
db0bb7ba CH |
199 | if (unlikely(error)) |
200 | goto out_cleanup_inode; | |
201 | ||
202 | if (default_acl) { | |
ef14f0c1 | 203 | error = -xfs_inherit_acl(inode, default_acl); |
db0bb7ba CH |
204 | if (unlikely(error)) |
205 | goto out_cleanup_inode; | |
ef14f0c1 | 206 | posix_acl_release(default_acl); |
1da177e4 LT |
207 | } |
208 | ||
1da177e4 | 209 | |
db0bb7ba | 210 | d_instantiate(dentry, inode); |
db0bb7ba CH |
211 | return -error; |
212 | ||
213 | out_cleanup_inode: | |
8f112e3b | 214 | xfs_cleanup_inode(dir, inode, dentry); |
db0bb7ba | 215 | out_free_acl: |
ef14f0c1 | 216 | posix_acl_release(default_acl); |
1da177e4 LT |
217 | return -error; |
218 | } | |
219 | ||
220 | STATIC int | |
416c6d5b | 221 | xfs_vn_create( |
1da177e4 LT |
222 | struct inode *dir, |
223 | struct dentry *dentry, | |
224 | int mode, | |
225 | struct nameidata *nd) | |
226 | { | |
416c6d5b | 227 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
228 | } |
229 | ||
230 | STATIC int | |
416c6d5b | 231 | xfs_vn_mkdir( |
1da177e4 LT |
232 | struct inode *dir, |
233 | struct dentry *dentry, | |
234 | int mode) | |
235 | { | |
416c6d5b | 236 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
237 | } |
238 | ||
239 | STATIC struct dentry * | |
416c6d5b | 240 | xfs_vn_lookup( |
1da177e4 LT |
241 | struct inode *dir, |
242 | struct dentry *dentry, | |
243 | struct nameidata *nd) | |
244 | { | |
ef1f5e7a | 245 | struct xfs_inode *cip; |
556b8b16 | 246 | struct xfs_name name; |
1da177e4 LT |
247 | int error; |
248 | ||
249 | if (dentry->d_name.len >= MAXNAMELEN) | |
250 | return ERR_PTR(-ENAMETOOLONG); | |
251 | ||
556b8b16 | 252 | xfs_dentry_to_name(&name, dentry); |
384f3ced | 253 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 254 | if (unlikely(error)) { |
1da177e4 LT |
255 | if (unlikely(error != ENOENT)) |
256 | return ERR_PTR(-error); | |
257 | d_add(dentry, NULL); | |
258 | return NULL; | |
259 | } | |
260 | ||
01651646 | 261 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
262 | } |
263 | ||
384f3ced BN |
264 | STATIC struct dentry * |
265 | xfs_vn_ci_lookup( | |
266 | struct inode *dir, | |
267 | struct dentry *dentry, | |
268 | struct nameidata *nd) | |
269 | { | |
270 | struct xfs_inode *ip; | |
271 | struct xfs_name xname; | |
272 | struct xfs_name ci_name; | |
273 | struct qstr dname; | |
274 | int error; | |
275 | ||
276 | if (dentry->d_name.len >= MAXNAMELEN) | |
277 | return ERR_PTR(-ENAMETOOLONG); | |
278 | ||
279 | xfs_dentry_to_name(&xname, dentry); | |
280 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); | |
281 | if (unlikely(error)) { | |
282 | if (unlikely(error != ENOENT)) | |
283 | return ERR_PTR(-error); | |
866d5dc9 BN |
284 | /* |
285 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
286 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
287 | * with CI filesystems). | |
288 | */ | |
384f3ced BN |
289 | return NULL; |
290 | } | |
291 | ||
292 | /* if exact match, just splice and exit */ | |
293 | if (!ci_name.name) | |
01651646 | 294 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
295 | |
296 | /* else case-insensitive match... */ | |
297 | dname.name = ci_name.name; | |
298 | dname.len = ci_name.len; | |
e45b590b | 299 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
300 | kmem_free(ci_name.name); |
301 | return dentry; | |
302 | } | |
303 | ||
1da177e4 | 304 | STATIC int |
416c6d5b | 305 | xfs_vn_link( |
1da177e4 LT |
306 | struct dentry *old_dentry, |
307 | struct inode *dir, | |
308 | struct dentry *dentry) | |
309 | { | |
d9424b3c | 310 | struct inode *inode = old_dentry->d_inode; |
556b8b16 | 311 | struct xfs_name name; |
1da177e4 LT |
312 | int error; |
313 | ||
556b8b16 | 314 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 315 | |
556b8b16 | 316 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 317 | if (unlikely(error)) |
a3da7896 | 318 | return -error; |
a3da7896 | 319 | |
d9424b3c | 320 | atomic_inc(&inode->i_count); |
a3da7896 CH |
321 | d_instantiate(dentry, inode); |
322 | return 0; | |
1da177e4 LT |
323 | } |
324 | ||
325 | STATIC int | |
416c6d5b | 326 | xfs_vn_unlink( |
1da177e4 LT |
327 | struct inode *dir, |
328 | struct dentry *dentry) | |
329 | { | |
556b8b16 | 330 | struct xfs_name name; |
1da177e4 LT |
331 | int error; |
332 | ||
556b8b16 | 333 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 334 | |
e5700704 CH |
335 | error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); |
336 | if (error) | |
337 | return error; | |
338 | ||
339 | /* | |
340 | * With unlink, the VFS makes the dentry "negative": no inode, | |
341 | * but still hashed. This is incompatible with case-insensitive | |
342 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
343 | */ | |
344 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
345 | d_invalidate(dentry); | |
346 | return 0; | |
1da177e4 LT |
347 | } |
348 | ||
349 | STATIC int | |
416c6d5b | 350 | xfs_vn_symlink( |
1da177e4 LT |
351 | struct inode *dir, |
352 | struct dentry *dentry, | |
353 | const char *symname) | |
354 | { | |
3937be5b CH |
355 | struct inode *inode; |
356 | struct xfs_inode *cip = NULL; | |
556b8b16 | 357 | struct xfs_name name; |
1da177e4 | 358 | int error; |
3e5daf05 | 359 | mode_t mode; |
1da177e4 | 360 | |
3e5daf05 | 361 | mode = S_IFLNK | |
ce3b0f8d | 362 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
556b8b16 | 363 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 364 | |
6c77b0ea | 365 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
366 | if (unlikely(error)) |
367 | goto out; | |
368 | ||
01651646 | 369 | inode = VFS_I(cip); |
3937be5b CH |
370 | |
371 | error = xfs_init_security(inode, dir); | |
372 | if (unlikely(error)) | |
373 | goto out_cleanup_inode; | |
374 | ||
375 | d_instantiate(dentry, inode); | |
3937be5b CH |
376 | return 0; |
377 | ||
378 | out_cleanup_inode: | |
8f112e3b | 379 | xfs_cleanup_inode(dir, inode, dentry); |
3937be5b | 380 | out: |
1da177e4 LT |
381 | return -error; |
382 | } | |
383 | ||
1da177e4 | 384 | STATIC int |
416c6d5b | 385 | xfs_vn_rename( |
1da177e4 LT |
386 | struct inode *odir, |
387 | struct dentry *odentry, | |
388 | struct inode *ndir, | |
389 | struct dentry *ndentry) | |
390 | { | |
391 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
392 | struct xfs_name oname; |
393 | struct xfs_name nname; | |
1da177e4 | 394 | |
556b8b16 BN |
395 | xfs_dentry_to_name(&oname, odentry); |
396 | xfs_dentry_to_name(&nname, ndentry); | |
397 | ||
e5700704 | 398 | return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
cfa853e4 CH |
399 | XFS_I(ndir), &nname, new_inode ? |
400 | XFS_I(new_inode) : NULL); | |
1da177e4 LT |
401 | } |
402 | ||
403 | /* | |
404 | * careful here - this function can get called recursively, so | |
405 | * we need to be very careful about how much stack we use. | |
406 | * uio is kmalloced for this reason... | |
407 | */ | |
008b150a | 408 | STATIC void * |
416c6d5b | 409 | xfs_vn_follow_link( |
1da177e4 LT |
410 | struct dentry *dentry, |
411 | struct nameidata *nd) | |
412 | { | |
1da177e4 | 413 | char *link; |
804c83c3 | 414 | int error = -ENOMEM; |
1da177e4 | 415 | |
f52720ca | 416 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
417 | if (!link) |
418 | goto out_err; | |
1da177e4 | 419 | |
739bfb2a | 420 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
421 | if (unlikely(error)) |
422 | goto out_kfree; | |
1da177e4 LT |
423 | |
424 | nd_set_link(nd, link); | |
008b150a | 425 | return NULL; |
804c83c3 CH |
426 | |
427 | out_kfree: | |
428 | kfree(link); | |
429 | out_err: | |
430 | nd_set_link(nd, ERR_PTR(error)); | |
431 | return NULL; | |
1da177e4 LT |
432 | } |
433 | ||
cde410a9 | 434 | STATIC void |
416c6d5b | 435 | xfs_vn_put_link( |
cde410a9 NS |
436 | struct dentry *dentry, |
437 | struct nameidata *nd, | |
438 | void *p) | |
1da177e4 | 439 | { |
cde410a9 NS |
440 | char *s = nd_get_link(nd); |
441 | ||
1da177e4 LT |
442 | if (!IS_ERR(s)) |
443 | kfree(s); | |
444 | } | |
445 | ||
1da177e4 | 446 | STATIC int |
416c6d5b | 447 | xfs_vn_getattr( |
c43f4087 CH |
448 | struct vfsmount *mnt, |
449 | struct dentry *dentry, | |
450 | struct kstat *stat) | |
1da177e4 | 451 | { |
c43f4087 CH |
452 | struct inode *inode = dentry->d_inode; |
453 | struct xfs_inode *ip = XFS_I(inode); | |
454 | struct xfs_mount *mp = ip->i_mount; | |
455 | ||
cca28fb8 | 456 | trace_xfs_getattr(ip); |
c43f4087 CH |
457 | |
458 | if (XFS_FORCED_SHUTDOWN(mp)) | |
459 | return XFS_ERROR(EIO); | |
460 | ||
461 | stat->size = XFS_ISIZE(ip); | |
462 | stat->dev = inode->i_sb->s_dev; | |
463 | stat->mode = ip->i_d.di_mode; | |
464 | stat->nlink = ip->i_d.di_nlink; | |
465 | stat->uid = ip->i_d.di_uid; | |
466 | stat->gid = ip->i_d.di_gid; | |
467 | stat->ino = ip->i_ino; | |
c43f4087 | 468 | stat->atime = inode->i_atime; |
f9581b14 CH |
469 | stat->mtime = inode->i_mtime; |
470 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
471 | stat->blocks = |
472 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
473 | ||
474 | ||
475 | switch (inode->i_mode & S_IFMT) { | |
476 | case S_IFBLK: | |
477 | case S_IFCHR: | |
478 | stat->blksize = BLKDEV_IOSIZE; | |
479 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
480 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
481 | break; | |
482 | default: | |
71ddabb9 | 483 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
484 | /* |
485 | * If the file blocks are being allocated from a | |
486 | * realtime volume, then return the inode's realtime | |
487 | * extent size or the realtime volume's extent size. | |
488 | */ | |
489 | stat->blksize = | |
490 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
491 | } else | |
492 | stat->blksize = xfs_preferred_iosize(mp); | |
493 | stat->rdev = 0; | |
494 | break; | |
69e23b9a | 495 | } |
c43f4087 CH |
496 | |
497 | return 0; | |
1da177e4 LT |
498 | } |
499 | ||
500 | STATIC int | |
416c6d5b | 501 | xfs_vn_setattr( |
1da177e4 | 502 | struct dentry *dentry, |
0f285c8a | 503 | struct iattr *iattr) |
1da177e4 | 504 | { |
ea5a3dc8 | 505 | return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0); |
1da177e4 LT |
506 | } |
507 | ||
3ed65264 DC |
508 | STATIC long |
509 | xfs_vn_fallocate( | |
510 | struct inode *inode, | |
511 | int mode, | |
512 | loff_t offset, | |
513 | loff_t len) | |
514 | { | |
515 | long error; | |
516 | loff_t new_size = 0; | |
517 | xfs_flock64_t bf; | |
518 | xfs_inode_t *ip = XFS_I(inode); | |
519 | ||
520 | /* preallocation on directories not yet supported */ | |
521 | error = -ENODEV; | |
522 | if (S_ISDIR(inode->i_mode)) | |
523 | goto out_error; | |
524 | ||
525 | bf.l_whence = 0; | |
526 | bf.l_start = offset; | |
527 | bf.l_len = len; | |
528 | ||
529 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
07f1a4f5 DC |
530 | |
531 | /* check the new inode size is valid before allocating */ | |
532 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
533 | offset + len > i_size_read(inode)) { | |
534 | new_size = offset + len; | |
535 | error = inode_newsize_ok(inode, new_size); | |
536 | if (error) | |
537 | goto out_unlock; | |
538 | } | |
539 | ||
44a743f6 JG |
540 | error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, |
541 | 0, XFS_ATTR_NOLOCK); | |
07f1a4f5 DC |
542 | if (error) |
543 | goto out_unlock; | |
3ed65264 DC |
544 | |
545 | /* Change file size if needed */ | |
546 | if (new_size) { | |
0f285c8a | 547 | struct iattr iattr; |
3ed65264 | 548 | |
0f285c8a CH |
549 | iattr.ia_valid = ATTR_SIZE; |
550 | iattr.ia_size = new_size; | |
44a743f6 | 551 | error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK); |
3ed65264 DC |
552 | } |
553 | ||
07f1a4f5 | 554 | out_unlock: |
3ed65264 DC |
555 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
556 | out_error: | |
557 | return error; | |
558 | } | |
1da177e4 | 559 | |
f35642e2 ES |
560 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
561 | ||
562 | /* | |
563 | * Call fiemap helper to fill in user data. | |
564 | * Returns positive errors to xfs_getbmap. | |
565 | */ | |
566 | STATIC int | |
567 | xfs_fiemap_format( | |
568 | void **arg, | |
569 | struct getbmapx *bmv, | |
570 | int *full) | |
571 | { | |
572 | int error; | |
573 | struct fiemap_extent_info *fieinfo = *arg; | |
574 | u32 fiemap_flags = 0; | |
575 | u64 logical, physical, length; | |
576 | ||
577 | /* Do nothing for a hole */ | |
578 | if (bmv->bmv_block == -1LL) | |
579 | return 0; | |
580 | ||
581 | logical = BBTOB(bmv->bmv_offset); | |
582 | physical = BBTOB(bmv->bmv_block); | |
583 | length = BBTOB(bmv->bmv_length); | |
584 | ||
585 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) | |
586 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; | |
587 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { | |
588 | fiemap_flags |= FIEMAP_EXTENT_DELALLOC; | |
589 | physical = 0; /* no block yet */ | |
590 | } | |
591 | if (bmv->bmv_oflags & BMV_OF_LAST) | |
592 | fiemap_flags |= FIEMAP_EXTENT_LAST; | |
593 | ||
594 | error = fiemap_fill_next_extent(fieinfo, logical, physical, | |
595 | length, fiemap_flags); | |
596 | if (error > 0) { | |
597 | error = 0; | |
598 | *full = 1; /* user array now full */ | |
599 | } | |
600 | ||
601 | return -error; | |
602 | } | |
603 | ||
604 | STATIC int | |
605 | xfs_vn_fiemap( | |
606 | struct inode *inode, | |
607 | struct fiemap_extent_info *fieinfo, | |
608 | u64 start, | |
609 | u64 length) | |
610 | { | |
611 | xfs_inode_t *ip = XFS_I(inode); | |
612 | struct getbmapx bm; | |
613 | int error; | |
614 | ||
615 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); | |
616 | if (error) | |
617 | return error; | |
618 | ||
619 | /* Set up bmap header for xfs internal routine */ | |
620 | bm.bmv_offset = BTOBB(start); | |
621 | /* Special case for whole file */ | |
622 | if (length == FIEMAP_MAX_OFFSET) | |
623 | bm.bmv_length = -1LL; | |
624 | else | |
625 | bm.bmv_length = BTOBB(length); | |
626 | ||
97db39a1 | 627 | /* We add one because in getbmap world count includes the header */ |
2d1ff3c7 TM |
628 | bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : |
629 | fieinfo->fi_extents_max + 1; | |
630 | bm.bmv_count = min_t(__s32, bm.bmv_count, | |
631 | (PAGE_SIZE * 16 / sizeof(struct getbmapx))); | |
9af25465 | 632 | bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; |
f35642e2 ES |
633 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) |
634 | bm.bmv_iflags |= BMV_IF_ATTRFORK; | |
635 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) | |
636 | bm.bmv_iflags |= BMV_IF_DELALLOC; | |
637 | ||
638 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); | |
639 | if (error) | |
640 | return -error; | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
41be8bed | 645 | static const struct inode_operations xfs_inode_operations = { |
18f4c644 | 646 | .check_acl = xfs_check_acl, |
416c6d5b NS |
647 | .getattr = xfs_vn_getattr, |
648 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
649 | .setxattr = generic_setxattr, |
650 | .getxattr = generic_getxattr, | |
651 | .removexattr = generic_removexattr, | |
416c6d5b | 652 | .listxattr = xfs_vn_listxattr, |
3ed65264 | 653 | .fallocate = xfs_vn_fallocate, |
f35642e2 | 654 | .fiemap = xfs_vn_fiemap, |
1da177e4 LT |
655 | }; |
656 | ||
41be8bed | 657 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
658 | .create = xfs_vn_create, |
659 | .lookup = xfs_vn_lookup, | |
660 | .link = xfs_vn_link, | |
661 | .unlink = xfs_vn_unlink, | |
662 | .symlink = xfs_vn_symlink, | |
663 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
664 | /* |
665 | * Yes, XFS uses the same method for rmdir and unlink. | |
666 | * | |
667 | * There are some subtile differences deeper in the code, | |
668 | * but we use S_ISDIR to check for those. | |
669 | */ | |
670 | .rmdir = xfs_vn_unlink, | |
416c6d5b NS |
671 | .mknod = xfs_vn_mknod, |
672 | .rename = xfs_vn_rename, | |
18f4c644 | 673 | .check_acl = xfs_check_acl, |
416c6d5b NS |
674 | .getattr = xfs_vn_getattr, |
675 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
676 | .setxattr = generic_setxattr, |
677 | .getxattr = generic_getxattr, | |
678 | .removexattr = generic_removexattr, | |
416c6d5b | 679 | .listxattr = xfs_vn_listxattr, |
1da177e4 LT |
680 | }; |
681 | ||
41be8bed | 682 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
683 | .create = xfs_vn_create, |
684 | .lookup = xfs_vn_ci_lookup, | |
685 | .link = xfs_vn_link, | |
686 | .unlink = xfs_vn_unlink, | |
687 | .symlink = xfs_vn_symlink, | |
688 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
689 | /* |
690 | * Yes, XFS uses the same method for rmdir and unlink. | |
691 | * | |
692 | * There are some subtile differences deeper in the code, | |
693 | * but we use S_ISDIR to check for those. | |
694 | */ | |
695 | .rmdir = xfs_vn_unlink, | |
384f3ced BN |
696 | .mknod = xfs_vn_mknod, |
697 | .rename = xfs_vn_rename, | |
18f4c644 | 698 | .check_acl = xfs_check_acl, |
384f3ced BN |
699 | .getattr = xfs_vn_getattr, |
700 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
701 | .setxattr = generic_setxattr, |
702 | .getxattr = generic_getxattr, | |
703 | .removexattr = generic_removexattr, | |
384f3ced | 704 | .listxattr = xfs_vn_listxattr, |
384f3ced BN |
705 | }; |
706 | ||
41be8bed | 707 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 708 | .readlink = generic_readlink, |
416c6d5b NS |
709 | .follow_link = xfs_vn_follow_link, |
710 | .put_link = xfs_vn_put_link, | |
18f4c644 | 711 | .check_acl = xfs_check_acl, |
416c6d5b NS |
712 | .getattr = xfs_vn_getattr, |
713 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
714 | .setxattr = generic_setxattr, |
715 | .getxattr = generic_getxattr, | |
716 | .removexattr = generic_removexattr, | |
416c6d5b | 717 | .listxattr = xfs_vn_listxattr, |
1da177e4 | 718 | }; |
41be8bed CH |
719 | |
720 | STATIC void | |
721 | xfs_diflags_to_iflags( | |
722 | struct inode *inode, | |
723 | struct xfs_inode *ip) | |
724 | { | |
725 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
726 | inode->i_flags |= S_IMMUTABLE; | |
727 | else | |
728 | inode->i_flags &= ~S_IMMUTABLE; | |
729 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
730 | inode->i_flags |= S_APPEND; | |
731 | else | |
732 | inode->i_flags &= ~S_APPEND; | |
733 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
734 | inode->i_flags |= S_SYNC; | |
735 | else | |
736 | inode->i_flags &= ~S_SYNC; | |
737 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
738 | inode->i_flags |= S_NOATIME; | |
739 | else | |
740 | inode->i_flags &= ~S_NOATIME; | |
741 | } | |
742 | ||
743 | /* | |
744 | * Initialize the Linux inode, set up the operation vectors and | |
745 | * unlock the inode. | |
746 | * | |
747 | * When reading existing inodes from disk this is called directly | |
748 | * from xfs_iget, when creating a new inode it is called from | |
749 | * xfs_ialloc after setting up the inode. | |
bf904248 DC |
750 | * |
751 | * We are always called with an uninitialised linux inode here. | |
752 | * We need to initialise the necessary fields and take a reference | |
753 | * on it. | |
41be8bed CH |
754 | */ |
755 | void | |
756 | xfs_setup_inode( | |
757 | struct xfs_inode *ip) | |
758 | { | |
bf904248 DC |
759 | struct inode *inode = &ip->i_vnode; |
760 | ||
761 | inode->i_ino = ip->i_ino; | |
eaff8079 | 762 | inode->i_state = I_NEW; |
bf904248 | 763 | inode_add_to_lists(ip->i_mount->m_super, inode); |
41be8bed CH |
764 | |
765 | inode->i_mode = ip->i_d.di_mode; | |
766 | inode->i_nlink = ip->i_d.di_nlink; | |
767 | inode->i_uid = ip->i_d.di_uid; | |
768 | inode->i_gid = ip->i_d.di_gid; | |
769 | ||
770 | switch (inode->i_mode & S_IFMT) { | |
771 | case S_IFBLK: | |
772 | case S_IFCHR: | |
773 | inode->i_rdev = | |
774 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
775 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
776 | break; | |
777 | default: | |
778 | inode->i_rdev = 0; | |
779 | break; | |
780 | } | |
781 | ||
782 | inode->i_generation = ip->i_d.di_gen; | |
783 | i_size_write(inode, ip->i_d.di_size); | |
784 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
785 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
786 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
787 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
788 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
789 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
790 | xfs_diflags_to_iflags(inode, ip); | |
41be8bed CH |
791 | |
792 | switch (inode->i_mode & S_IFMT) { | |
793 | case S_IFREG: | |
794 | inode->i_op = &xfs_inode_operations; | |
795 | inode->i_fop = &xfs_file_operations; | |
796 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
797 | break; | |
798 | case S_IFDIR: | |
799 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
800 | inode->i_op = &xfs_dir_ci_inode_operations; | |
801 | else | |
802 | inode->i_op = &xfs_dir_inode_operations; | |
803 | inode->i_fop = &xfs_dir_file_operations; | |
804 | break; | |
805 | case S_IFLNK: | |
806 | inode->i_op = &xfs_symlink_inode_operations; | |
807 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) | |
808 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
809 | break; | |
810 | default: | |
811 | inode->i_op = &xfs_inode_operations; | |
812 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
813 | break; | |
814 | } | |
815 | ||
816 | xfs_iflags_clear(ip, XFS_INEW); | |
817 | barrier(); | |
818 | ||
819 | unlock_new_inode(inode); | |
820 | } |