Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 LT |
18 | #include "xfs.h" |
19 | #include "xfs_fs.h" | |
70a9883c | 20 | #include "xfs_shared.h" |
239880ef DC |
21 | #include "xfs_format.h" |
22 | #include "xfs_log_format.h" | |
23 | #include "xfs_trans_resv.h" | |
1da177e4 LT |
24 | #include "xfs_sb.h" |
25 | #include "xfs_ag.h" | |
1da177e4 | 26 | #include "xfs_mount.h" |
57062787 | 27 | #include "xfs_da_format.h" |
1da177e4 LT |
28 | #include "xfs_inode.h" |
29 | #include "xfs_bmap.h" | |
68988114 | 30 | #include "xfs_bmap_util.h" |
239880ef | 31 | #include "xfs_acl.h" |
239880ef | 32 | #include "xfs_quota.h" |
1da177e4 | 33 | #include "xfs_error.h" |
1da177e4 | 34 | #include "xfs_attr.h" |
239880ef | 35 | #include "xfs_trans.h" |
0b1b213f | 36 | #include "xfs_trace.h" |
27b52867 | 37 | #include "xfs_icache.h" |
c24b5dfa | 38 | #include "xfs_symlink.h" |
0cb97766 | 39 | #include "xfs_da_btree.h" |
0cb97766 | 40 | #include "xfs_dir2_priv.h" |
a4fbe6ab | 41 | #include "xfs_dinode.h" |
99b6436b | 42 | #include "xfs_trans_space.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> |
f35642e2 | 49 | #include <linux/fiemap.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
1da177e4 | 51 | |
93a8614e DC |
52 | /* |
53 | * Directories have different lock order w.r.t. mmap_sem compared to regular | |
54 | * files. This is due to readdir potentially triggering page faults on a user | |
55 | * buffer inside filldir(), and this happens with the ilock on the directory | |
56 | * held. For regular files, the lock order is the other way around - the | |
57 | * mmap_sem is taken during the page fault, and then we lock the ilock to do | |
58 | * block mapping. Hence we need a different class for the directory ilock so | |
59 | * that lockdep can tell them apart. | |
60 | */ | |
61 | static struct lock_class_key xfs_nondir_ilock_class; | |
62 | static struct lock_class_key xfs_dir_ilock_class; | |
63 | ||
8d2a5e6e DC |
64 | static int |
65 | xfs_initxattrs( | |
66 | struct inode *inode, | |
67 | const struct xattr *xattr_array, | |
68 | void *fs_info) | |
9d8f13ba | 69 | { |
8d2a5e6e DC |
70 | const struct xattr *xattr; |
71 | struct xfs_inode *ip = XFS_I(inode); | |
72 | int error = 0; | |
9d8f13ba MZ |
73 | |
74 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
75 | error = xfs_attr_set(ip, xattr->name, xattr->value, | |
76 | xattr->value_len, ATTR_SECURE); | |
77 | if (error < 0) | |
78 | break; | |
79 | } | |
80 | return error; | |
81 | } | |
82 | ||
446ada4a NS |
83 | /* |
84 | * Hook in SELinux. This is not quite correct yet, what we really need | |
85 | * here (as we do for default ACLs) is a mechanism by which creation of | |
86 | * these attrs can be journalled at inode creation time (along with the | |
87 | * inode, of course, such that log replay can't cause these to be lost). | |
88 | */ | |
9d8f13ba | 89 | |
446ada4a | 90 | STATIC int |
416c6d5b | 91 | xfs_init_security( |
af048193 | 92 | struct inode *inode, |
2a7dba39 EP |
93 | struct inode *dir, |
94 | const struct qstr *qstr) | |
446ada4a | 95 | { |
9d8f13ba MZ |
96 | return security_inode_init_security(inode, dir, qstr, |
97 | &xfs_initxattrs, NULL); | |
446ada4a NS |
98 | } |
99 | ||
556b8b16 BN |
100 | static void |
101 | xfs_dentry_to_name( | |
102 | struct xfs_name *namep, | |
0cb97766 DC |
103 | struct dentry *dentry, |
104 | int mode) | |
556b8b16 BN |
105 | { |
106 | namep->name = dentry->d_name.name; | |
107 | namep->len = dentry->d_name.len; | |
0cb97766 | 108 | namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT]; |
556b8b16 BN |
109 | } |
110 | ||
7989cb8e | 111 | STATIC void |
416c6d5b | 112 | xfs_cleanup_inode( |
739bfb2a | 113 | struct inode *dir, |
af048193 | 114 | struct inode *inode, |
8f112e3b | 115 | struct dentry *dentry) |
3a69c7dc | 116 | { |
556b8b16 | 117 | struct xfs_name teardown; |
3a69c7dc YL |
118 | |
119 | /* Oh, the horror. | |
220b5284 | 120 | * If we can't add the ACL or we fail in |
416c6d5b | 121 | * xfs_init_security we must back out. |
3a69c7dc YL |
122 | * ENOSPC can hit here, among other things. |
123 | */ | |
0cb97766 | 124 | xfs_dentry_to_name(&teardown, dentry, 0); |
3a69c7dc | 125 | |
8f112e3b | 126 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
af048193 | 127 | iput(inode); |
3a69c7dc YL |
128 | } |
129 | ||
1da177e4 | 130 | STATIC int |
416c6d5b | 131 | xfs_vn_mknod( |
1da177e4 LT |
132 | struct inode *dir, |
133 | struct dentry *dentry, | |
1a67aafb | 134 | umode_t mode, |
1da177e4 LT |
135 | dev_t rdev) |
136 | { | |
db0bb7ba | 137 | struct inode *inode; |
979ebab1 | 138 | struct xfs_inode *ip = NULL; |
2401dc29 | 139 | struct posix_acl *default_acl, *acl; |
556b8b16 | 140 | struct xfs_name name; |
1da177e4 LT |
141 | int error; |
142 | ||
143 | /* | |
144 | * Irix uses Missed'em'V split, but doesn't want to see | |
145 | * the upper 5 bits of (14bit) major. | |
146 | */ | |
517b5e8c CH |
147 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
148 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
149 | return -EINVAL; | |
150 | rdev = sysv_encode_dev(rdev); | |
151 | } else { | |
152 | rdev = 0; | |
153 | } | |
1da177e4 | 154 | |
2401dc29 CH |
155 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
156 | if (error) | |
157 | return error; | |
1da177e4 | 158 | |
0cb97766 | 159 | xfs_dentry_to_name(&name, dentry, mode); |
6c77b0ea | 160 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
db0bb7ba CH |
161 | if (unlikely(error)) |
162 | goto out_free_acl; | |
446ada4a | 163 | |
01651646 | 164 | inode = VFS_I(ip); |
979ebab1 | 165 | |
2a7dba39 | 166 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
167 | if (unlikely(error)) |
168 | goto out_cleanup_inode; | |
169 | ||
2401dc29 | 170 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 171 | if (default_acl) { |
2401dc29 CH |
172 | error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
173 | if (error) | |
db0bb7ba | 174 | goto out_cleanup_inode; |
1da177e4 | 175 | } |
2401dc29 CH |
176 | if (acl) { |
177 | error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); | |
178 | if (error) | |
179 | goto out_cleanup_inode; | |
180 | } | |
181 | #endif | |
1da177e4 | 182 | |
db0bb7ba | 183 | d_instantiate(dentry, inode); |
2401dc29 CH |
184 | out_free_acl: |
185 | if (default_acl) | |
186 | posix_acl_release(default_acl); | |
187 | if (acl) | |
188 | posix_acl_release(acl); | |
db0bb7ba CH |
189 | return -error; |
190 | ||
191 | out_cleanup_inode: | |
8f112e3b | 192 | xfs_cleanup_inode(dir, inode, dentry); |
2401dc29 | 193 | goto out_free_acl; |
1da177e4 LT |
194 | } |
195 | ||
196 | STATIC int | |
416c6d5b | 197 | xfs_vn_create( |
1da177e4 LT |
198 | struct inode *dir, |
199 | struct dentry *dentry, | |
4acdaf27 | 200 | umode_t mode, |
ebfc3b49 | 201 | bool flags) |
1da177e4 | 202 | { |
416c6d5b | 203 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
204 | } |
205 | ||
206 | STATIC int | |
416c6d5b | 207 | xfs_vn_mkdir( |
1da177e4 LT |
208 | struct inode *dir, |
209 | struct dentry *dentry, | |
18bb1db3 | 210 | umode_t mode) |
1da177e4 | 211 | { |
416c6d5b | 212 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
213 | } |
214 | ||
215 | STATIC struct dentry * | |
416c6d5b | 216 | xfs_vn_lookup( |
1da177e4 LT |
217 | struct inode *dir, |
218 | struct dentry *dentry, | |
00cd8dd3 | 219 | unsigned int flags) |
1da177e4 | 220 | { |
ef1f5e7a | 221 | struct xfs_inode *cip; |
556b8b16 | 222 | struct xfs_name name; |
1da177e4 LT |
223 | int error; |
224 | ||
225 | if (dentry->d_name.len >= MAXNAMELEN) | |
226 | return ERR_PTR(-ENAMETOOLONG); | |
227 | ||
0cb97766 | 228 | xfs_dentry_to_name(&name, dentry, 0); |
384f3ced | 229 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 230 | if (unlikely(error)) { |
1da177e4 LT |
231 | if (unlikely(error != ENOENT)) |
232 | return ERR_PTR(-error); | |
233 | d_add(dentry, NULL); | |
234 | return NULL; | |
235 | } | |
236 | ||
01651646 | 237 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
238 | } |
239 | ||
384f3ced BN |
240 | STATIC struct dentry * |
241 | xfs_vn_ci_lookup( | |
242 | struct inode *dir, | |
243 | struct dentry *dentry, | |
00cd8dd3 | 244 | unsigned int flags) |
384f3ced BN |
245 | { |
246 | struct xfs_inode *ip; | |
247 | struct xfs_name xname; | |
248 | struct xfs_name ci_name; | |
249 | struct qstr dname; | |
250 | int error; | |
251 | ||
252 | if (dentry->d_name.len >= MAXNAMELEN) | |
253 | return ERR_PTR(-ENAMETOOLONG); | |
254 | ||
0cb97766 | 255 | xfs_dentry_to_name(&xname, dentry, 0); |
384f3ced BN |
256 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
257 | if (unlikely(error)) { | |
258 | if (unlikely(error != ENOENT)) | |
259 | return ERR_PTR(-error); | |
866d5dc9 BN |
260 | /* |
261 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
262 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
263 | * with CI filesystems). | |
264 | */ | |
384f3ced BN |
265 | return NULL; |
266 | } | |
267 | ||
268 | /* if exact match, just splice and exit */ | |
269 | if (!ci_name.name) | |
01651646 | 270 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
271 | |
272 | /* else case-insensitive match... */ | |
273 | dname.name = ci_name.name; | |
274 | dname.len = ci_name.len; | |
e45b590b | 275 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
276 | kmem_free(ci_name.name); |
277 | return dentry; | |
278 | } | |
279 | ||
1da177e4 | 280 | STATIC int |
416c6d5b | 281 | xfs_vn_link( |
1da177e4 LT |
282 | struct dentry *old_dentry, |
283 | struct inode *dir, | |
284 | struct dentry *dentry) | |
285 | { | |
d9424b3c | 286 | struct inode *inode = old_dentry->d_inode; |
556b8b16 | 287 | struct xfs_name name; |
1da177e4 LT |
288 | int error; |
289 | ||
0cb97766 | 290 | xfs_dentry_to_name(&name, dentry, inode->i_mode); |
1da177e4 | 291 | |
556b8b16 | 292 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 293 | if (unlikely(error)) |
a3da7896 | 294 | return -error; |
a3da7896 | 295 | |
7de9c6ee | 296 | ihold(inode); |
a3da7896 CH |
297 | d_instantiate(dentry, inode); |
298 | return 0; | |
1da177e4 LT |
299 | } |
300 | ||
301 | STATIC int | |
416c6d5b | 302 | xfs_vn_unlink( |
1da177e4 LT |
303 | struct inode *dir, |
304 | struct dentry *dentry) | |
305 | { | |
556b8b16 | 306 | struct xfs_name name; |
1da177e4 LT |
307 | int error; |
308 | ||
0cb97766 | 309 | xfs_dentry_to_name(&name, dentry, 0); |
1da177e4 | 310 | |
e5700704 CH |
311 | error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); |
312 | if (error) | |
313 | return error; | |
314 | ||
315 | /* | |
316 | * With unlink, the VFS makes the dentry "negative": no inode, | |
317 | * but still hashed. This is incompatible with case-insensitive | |
318 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
319 | */ | |
320 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
321 | d_invalidate(dentry); | |
322 | return 0; | |
1da177e4 LT |
323 | } |
324 | ||
325 | STATIC int | |
416c6d5b | 326 | xfs_vn_symlink( |
1da177e4 LT |
327 | struct inode *dir, |
328 | struct dentry *dentry, | |
329 | const char *symname) | |
330 | { | |
3937be5b CH |
331 | struct inode *inode; |
332 | struct xfs_inode *cip = NULL; | |
556b8b16 | 333 | struct xfs_name name; |
1da177e4 | 334 | int error; |
576b1d67 | 335 | umode_t mode; |
1da177e4 | 336 | |
3e5daf05 | 337 | mode = S_IFLNK | |
ce3b0f8d | 338 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
0cb97766 | 339 | xfs_dentry_to_name(&name, dentry, mode); |
1da177e4 | 340 | |
6c77b0ea | 341 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
342 | if (unlikely(error)) |
343 | goto out; | |
344 | ||
01651646 | 345 | inode = VFS_I(cip); |
3937be5b | 346 | |
2a7dba39 | 347 | error = xfs_init_security(inode, dir, &dentry->d_name); |
3937be5b CH |
348 | if (unlikely(error)) |
349 | goto out_cleanup_inode; | |
350 | ||
351 | d_instantiate(dentry, inode); | |
3937be5b CH |
352 | return 0; |
353 | ||
354 | out_cleanup_inode: | |
8f112e3b | 355 | xfs_cleanup_inode(dir, inode, dentry); |
3937be5b | 356 | out: |
1da177e4 LT |
357 | return -error; |
358 | } | |
359 | ||
1da177e4 | 360 | STATIC int |
416c6d5b | 361 | xfs_vn_rename( |
1da177e4 LT |
362 | struct inode *odir, |
363 | struct dentry *odentry, | |
364 | struct inode *ndir, | |
365 | struct dentry *ndentry) | |
366 | { | |
367 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
368 | struct xfs_name oname; |
369 | struct xfs_name nname; | |
1da177e4 | 370 | |
0cb97766 DC |
371 | xfs_dentry_to_name(&oname, odentry, 0); |
372 | xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode); | |
556b8b16 | 373 | |
e5700704 | 374 | return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
cfa853e4 | 375 | XFS_I(ndir), &nname, new_inode ? |
0cb97766 | 376 | XFS_I(new_inode) : NULL); |
1da177e4 LT |
377 | } |
378 | ||
379 | /* | |
380 | * careful here - this function can get called recursively, so | |
381 | * we need to be very careful about how much stack we use. | |
382 | * uio is kmalloced for this reason... | |
383 | */ | |
008b150a | 384 | STATIC void * |
416c6d5b | 385 | xfs_vn_follow_link( |
1da177e4 LT |
386 | struct dentry *dentry, |
387 | struct nameidata *nd) | |
388 | { | |
1da177e4 | 389 | char *link; |
804c83c3 | 390 | int error = -ENOMEM; |
1da177e4 | 391 | |
f52720ca | 392 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
393 | if (!link) |
394 | goto out_err; | |
1da177e4 | 395 | |
739bfb2a | 396 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
397 | if (unlikely(error)) |
398 | goto out_kfree; | |
1da177e4 LT |
399 | |
400 | nd_set_link(nd, link); | |
008b150a | 401 | return NULL; |
804c83c3 CH |
402 | |
403 | out_kfree: | |
404 | kfree(link); | |
405 | out_err: | |
406 | nd_set_link(nd, ERR_PTR(error)); | |
407 | return NULL; | |
1da177e4 LT |
408 | } |
409 | ||
1da177e4 | 410 | STATIC int |
416c6d5b | 411 | xfs_vn_getattr( |
c43f4087 CH |
412 | struct vfsmount *mnt, |
413 | struct dentry *dentry, | |
414 | struct kstat *stat) | |
1da177e4 | 415 | { |
c43f4087 CH |
416 | struct inode *inode = dentry->d_inode; |
417 | struct xfs_inode *ip = XFS_I(inode); | |
418 | struct xfs_mount *mp = ip->i_mount; | |
419 | ||
cca28fb8 | 420 | trace_xfs_getattr(ip); |
c43f4087 CH |
421 | |
422 | if (XFS_FORCED_SHUTDOWN(mp)) | |
ed32201e | 423 | return -XFS_ERROR(EIO); |
c43f4087 CH |
424 | |
425 | stat->size = XFS_ISIZE(ip); | |
426 | stat->dev = inode->i_sb->s_dev; | |
427 | stat->mode = ip->i_d.di_mode; | |
428 | stat->nlink = ip->i_d.di_nlink; | |
7aab1b28 DE |
429 | stat->uid = inode->i_uid; |
430 | stat->gid = inode->i_gid; | |
c43f4087 | 431 | stat->ino = ip->i_ino; |
c43f4087 | 432 | stat->atime = inode->i_atime; |
f9581b14 CH |
433 | stat->mtime = inode->i_mtime; |
434 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
435 | stat->blocks = |
436 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
437 | ||
438 | ||
439 | switch (inode->i_mode & S_IFMT) { | |
440 | case S_IFBLK: | |
441 | case S_IFCHR: | |
442 | stat->blksize = BLKDEV_IOSIZE; | |
443 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
444 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
445 | break; | |
446 | default: | |
71ddabb9 | 447 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
448 | /* |
449 | * If the file blocks are being allocated from a | |
450 | * realtime volume, then return the inode's realtime | |
451 | * extent size or the realtime volume's extent size. | |
452 | */ | |
453 | stat->blksize = | |
454 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
455 | } else | |
456 | stat->blksize = xfs_preferred_iosize(mp); | |
457 | stat->rdev = 0; | |
458 | break; | |
69e23b9a | 459 | } |
c43f4087 CH |
460 | |
461 | return 0; | |
1da177e4 LT |
462 | } |
463 | ||
56c19e89 DC |
464 | static void |
465 | xfs_setattr_mode( | |
56c19e89 DC |
466 | struct xfs_inode *ip, |
467 | struct iattr *iattr) | |
468 | { | |
0c3d88df CH |
469 | struct inode *inode = VFS_I(ip); |
470 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 471 | |
56c19e89 DC |
472 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
473 | ||
56c19e89 DC |
474 | ip->i_d.di_mode &= S_IFMT; |
475 | ip->i_d.di_mode |= mode & ~S_IFMT; | |
476 | ||
477 | inode->i_mode &= S_IFMT; | |
478 | inode->i_mode |= mode & ~S_IFMT; | |
479 | } | |
480 | ||
c91c46c1 CH |
481 | static void |
482 | xfs_setattr_time( | |
483 | struct xfs_inode *ip, | |
484 | struct iattr *iattr) | |
485 | { | |
486 | struct inode *inode = VFS_I(ip); | |
487 | ||
488 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
489 | ||
490 | if (iattr->ia_valid & ATTR_ATIME) { | |
491 | inode->i_atime = iattr->ia_atime; | |
492 | ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; | |
493 | ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; | |
494 | } | |
495 | if (iattr->ia_valid & ATTR_CTIME) { | |
496 | inode->i_ctime = iattr->ia_ctime; | |
497 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; | |
498 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; | |
499 | } | |
500 | if (iattr->ia_valid & ATTR_MTIME) { | |
501 | inode->i_mtime = iattr->ia_mtime; | |
502 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; | |
503 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; | |
504 | } | |
505 | } | |
506 | ||
c4ed4243 CH |
507 | int |
508 | xfs_setattr_nonsize( | |
509 | struct xfs_inode *ip, | |
510 | struct iattr *iattr, | |
511 | int flags) | |
512 | { | |
513 | xfs_mount_t *mp = ip->i_mount; | |
514 | struct inode *inode = VFS_I(ip); | |
515 | int mask = iattr->ia_valid; | |
516 | xfs_trans_t *tp; | |
517 | int error; | |
7aab1b28 DE |
518 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
519 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
520 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
521 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
522 | ||
523 | trace_xfs_setattr(ip); | |
524 | ||
42c49d7f CM |
525 | /* If acls are being inherited, we already have this checked */ |
526 | if (!(flags & XFS_ATTR_NOACL)) { | |
527 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
528 | return XFS_ERROR(EROFS); | |
c4ed4243 | 529 | |
42c49d7f CM |
530 | if (XFS_FORCED_SHUTDOWN(mp)) |
531 | return XFS_ERROR(EIO); | |
c4ed4243 | 532 | |
42c49d7f CM |
533 | error = -inode_change_ok(inode, iattr); |
534 | if (error) | |
535 | return XFS_ERROR(error); | |
536 | } | |
c4ed4243 CH |
537 | |
538 | ASSERT((mask & ATTR_SIZE) == 0); | |
539 | ||
540 | /* | |
541 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
542 | * before we start any other transactions. Trying to do this later | |
543 | * is messy. We don't care to take a readlock to look at the ids | |
544 | * in inode here, because we can't hold it across the trans_reserve. | |
545 | * If the IDs do change before we take the ilock, we're covered | |
546 | * because the i_*dquot fields will get updated anyway. | |
547 | */ | |
548 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
549 | uint qflags = 0; | |
550 | ||
551 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
552 | uid = iattr->ia_uid; | |
553 | qflags |= XFS_QMOPT_UQUOTA; | |
554 | } else { | |
7aab1b28 | 555 | uid = inode->i_uid; |
c4ed4243 CH |
556 | } |
557 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
558 | gid = iattr->ia_gid; | |
559 | qflags |= XFS_QMOPT_GQUOTA; | |
560 | } else { | |
7aab1b28 | 561 | gid = inode->i_gid; |
c4ed4243 CH |
562 | } |
563 | ||
564 | /* | |
565 | * We take a reference when we initialize udqp and gdqp, | |
566 | * so it is important that we never blindly double trip on | |
567 | * the same variable. See xfs_create() for an example. | |
568 | */ | |
569 | ASSERT(udqp == NULL); | |
570 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
571 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
572 | xfs_kgid_to_gid(gid), | |
573 | xfs_get_projid(ip), | |
574 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
575 | if (error) |
576 | return error; | |
577 | } | |
578 | ||
579 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); | |
3d3c8b52 | 580 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); |
c4ed4243 CH |
581 | if (error) |
582 | goto out_dqrele; | |
583 | ||
584 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
585 | ||
586 | /* | |
587 | * Change file ownership. Must be the owner or privileged. | |
588 | */ | |
589 | if (mask & (ATTR_UID|ATTR_GID)) { | |
590 | /* | |
591 | * These IDs could have changed since we last looked at them. | |
592 | * But, we're assured that if the ownership did change | |
593 | * while we didn't have the inode locked, inode's dquot(s) | |
594 | * would have changed also. | |
595 | */ | |
7aab1b28 DE |
596 | iuid = inode->i_uid; |
597 | igid = inode->i_gid; | |
c4ed4243 CH |
598 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
599 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
600 | ||
601 | /* | |
602 | * Do a quota reservation only if uid/gid is actually | |
603 | * going to change. | |
604 | */ | |
605 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
606 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
607 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
608 | ASSERT(tp); |
609 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 610 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
611 | XFS_QMOPT_FORCE_RES : 0); |
612 | if (error) /* out of quota */ | |
613 | goto out_trans_cancel; | |
614 | } | |
615 | } | |
616 | ||
ddc3415a | 617 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
618 | |
619 | /* | |
620 | * Change file ownership. Must be the owner or privileged. | |
621 | */ | |
622 | if (mask & (ATTR_UID|ATTR_GID)) { | |
623 | /* | |
624 | * CAP_FSETID overrides the following restrictions: | |
625 | * | |
626 | * The set-user-ID and set-group-ID bits of a file will be | |
627 | * cleared upon successful return from chown() | |
628 | */ | |
629 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
630 | !capable(CAP_FSETID)) | |
631 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
632 | ||
633 | /* | |
634 | * Change the ownerships and register quota modifications | |
635 | * in the transaction. | |
636 | */ | |
7aab1b28 | 637 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
638 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
639 | ASSERT(mask & ATTR_UID); | |
640 | ASSERT(udqp); | |
641 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
642 | &ip->i_udquot, udqp); | |
643 | } | |
7aab1b28 | 644 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
645 | inode->i_uid = uid; |
646 | } | |
7aab1b28 | 647 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 648 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
649 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
650 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
651 | ASSERT(mask & ATTR_GID); |
652 | ASSERT(gdqp); | |
653 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
654 | &ip->i_gdquot, gdqp); | |
655 | } | |
7aab1b28 | 656 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
657 | inode->i_gid = gid; |
658 | } | |
659 | } | |
660 | ||
56c19e89 | 661 | if (mask & ATTR_MODE) |
0c3d88df | 662 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
663 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
664 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
665 | |
666 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
667 | ||
668 | XFS_STATS_INC(xs_ig_attrchg); | |
669 | ||
670 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
671 | xfs_trans_set_sync(tp); | |
672 | error = xfs_trans_commit(tp, 0); | |
673 | ||
674 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
675 | ||
676 | /* | |
677 | * Release any dquot(s) the inode had kept before chown. | |
678 | */ | |
679 | xfs_qm_dqrele(olddquot1); | |
680 | xfs_qm_dqrele(olddquot2); | |
681 | xfs_qm_dqrele(udqp); | |
682 | xfs_qm_dqrele(gdqp); | |
683 | ||
684 | if (error) | |
685 | return XFS_ERROR(error); | |
686 | ||
687 | /* | |
688 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
689 | * update. We could avoid this with linked transactions | |
690 | * and passing down the transaction pointer all the way | |
691 | * to attr_set. No previous user of the generic | |
692 | * Posix ACL code seems to care about this issue either. | |
693 | */ | |
694 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2401dc29 | 695 | error = -posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 CH |
696 | if (error) |
697 | return XFS_ERROR(error); | |
698 | } | |
699 | ||
700 | return 0; | |
701 | ||
702 | out_trans_cancel: | |
703 | xfs_trans_cancel(tp, 0); | |
704 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
705 | out_dqrele: | |
706 | xfs_qm_dqrele(udqp); | |
707 | xfs_qm_dqrele(gdqp); | |
708 | return error; | |
709 | } | |
710 | ||
711 | /* | |
712 | * Truncate file. Must have write permission and not be a directory. | |
713 | */ | |
714 | int | |
715 | xfs_setattr_size( | |
716 | struct xfs_inode *ip, | |
76ca4c23 | 717 | struct iattr *iattr) |
c4ed4243 CH |
718 | { |
719 | struct xfs_mount *mp = ip->i_mount; | |
720 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 721 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
722 | struct xfs_trans *tp; |
723 | int error; | |
f38996f5 | 724 | uint lock_flags = 0; |
c4ed4243 CH |
725 | uint commit_flags = 0; |
726 | ||
727 | trace_xfs_setattr(ip); | |
728 | ||
729 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
730 | return XFS_ERROR(EROFS); | |
731 | ||
732 | if (XFS_FORCED_SHUTDOWN(mp)) | |
733 | return XFS_ERROR(EIO); | |
734 | ||
735 | error = -inode_change_ok(inode, iattr); | |
736 | if (error) | |
737 | return XFS_ERROR(error); | |
738 | ||
76ca4c23 | 739 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
c4ed4243 | 740 | ASSERT(S_ISREG(ip->i_d.di_mode)); |
fe60a8a0 CH |
741 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
742 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 743 | |
ce7ae151 | 744 | oldsize = inode->i_size; |
673e8e59 CH |
745 | newsize = iattr->ia_size; |
746 | ||
c4ed4243 CH |
747 | /* |
748 | * Short circuit the truncate case for zero length files. | |
749 | */ | |
673e8e59 | 750 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 751 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 752 | return 0; |
681b1200 CH |
753 | |
754 | /* | |
755 | * Use the regular setattr path to update the timestamps. | |
756 | */ | |
681b1200 CH |
757 | iattr->ia_valid &= ~ATTR_SIZE; |
758 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
759 | } |
760 | ||
761 | /* | |
762 | * Make sure that the dquots are attached to the inode. | |
763 | */ | |
f38996f5 | 764 | error = xfs_qm_dqattach(ip, 0); |
c4ed4243 | 765 | if (error) |
76ca4c23 | 766 | return error; |
c4ed4243 CH |
767 | |
768 | /* | |
769 | * Now we can make the changes. Before we join the inode to the | |
770 | * transaction, take care of the part of the truncation that must be | |
771 | * done without the inode lock. This needs to be done before joining | |
772 | * the inode to the transaction, because the inode cannot be unlocked | |
773 | * once it is a part of the transaction. | |
774 | */ | |
673e8e59 | 775 | if (newsize > oldsize) { |
c4ed4243 CH |
776 | /* |
777 | * Do the first part of growing a file: zero any data in the | |
778 | * last block that is beyond the old EOF. We need to do this | |
779 | * before the inode is joined to the transaction to modify | |
780 | * i_size. | |
781 | */ | |
673e8e59 | 782 | error = xfs_zero_eof(ip, newsize, oldsize); |
c4ed4243 | 783 | if (error) |
76ca4c23 | 784 | return error; |
c4ed4243 | 785 | } |
c4ed4243 CH |
786 | |
787 | /* | |
788 | * We are going to log the inode size change in this transaction so | |
789 | * any previous writes that are beyond the on disk EOF and the new | |
790 | * EOF that have not been written out need to be written here. If we | |
791 | * do not write the data out, we expose ourselves to the null files | |
792 | * problem. | |
793 | * | |
794 | * Only flush from the on disk size to the smaller of the in memory | |
795 | * file size or the new size as that's the range we really care about | |
796 | * here and prevents waiting for other data not within the range we | |
797 | * care about here. | |
798 | */ | |
673e8e59 | 799 | if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) { |
4bc1ea6b DC |
800 | error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
801 | ip->i_d.di_size, newsize); | |
c4ed4243 | 802 | if (error) |
76ca4c23 | 803 | return error; |
c4ed4243 CH |
804 | } |
805 | ||
806 | /* | |
4a06fd26 | 807 | * Wait for all direct I/O to complete. |
c4ed4243 | 808 | */ |
4a06fd26 | 809 | inode_dio_wait(inode); |
c4ed4243 | 810 | |
673e8e59 | 811 | error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks); |
c4ed4243 | 812 | if (error) |
76ca4c23 | 813 | return error; |
c4ed4243 CH |
814 | |
815 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); | |
3d3c8b52 | 816 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
c4ed4243 CH |
817 | if (error) |
818 | goto out_trans_cancel; | |
819 | ||
673e8e59 | 820 | truncate_setsize(inode, newsize); |
c4ed4243 CH |
821 | |
822 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; | |
823 | lock_flags |= XFS_ILOCK_EXCL; | |
824 | ||
825 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
826 | ||
ddc3415a | 827 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
828 | |
829 | /* | |
830 | * Only change the c/mtime if we are changing the size or we are | |
831 | * explicitly asked to change it. This handles the semantic difference | |
832 | * between truncate() and ftruncate() as implemented in the VFS. | |
833 | * | |
834 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
835 | * special case where we need to update the times despite not having | |
836 | * these flags set. For all other operations the VFS set these flags | |
837 | * explicitly if it wants a timestamp update. | |
838 | */ | |
fe60a8a0 CH |
839 | if (newsize != oldsize && |
840 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 CH |
841 | iattr->ia_ctime = iattr->ia_mtime = |
842 | current_fs_time(inode->i_sb); | |
fe60a8a0 | 843 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
844 | } |
845 | ||
673e8e59 CH |
846 | /* |
847 | * The first thing we do is set the size to new_size permanently on | |
848 | * disk. This way we don't have to worry about anyone ever being able | |
849 | * to look at the data being freed even in the face of a crash. | |
850 | * What we're getting around here is the case where we free a block, it | |
851 | * is allocated to another file, it is written to, and then we crash. | |
852 | * If the new data gets written to the file but the log buffers | |
853 | * containing the free and reallocation don't, then we'd end up with | |
854 | * garbage in the blocks being freed. As long as we make the new size | |
855 | * permanent before actually freeing any blocks it doesn't matter if | |
856 | * they get written to. | |
857 | */ | |
858 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
859 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
860 | ||
861 | if (newsize <= oldsize) { | |
862 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 CH |
863 | if (error) |
864 | goto out_trans_abort; | |
865 | ||
866 | /* | |
867 | * Truncated "down", so we're removing references to old data | |
868 | * here - if we delay flushing for a long time, we expose | |
869 | * ourselves unduly to the notorious NULL files problem. So, | |
870 | * we mark this inode and flush it when the file is closed, | |
871 | * and do not wait the usual (long) time for writeout. | |
872 | */ | |
873 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
874 | |
875 | /* A truncate down always removes post-EOF blocks. */ | |
876 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
877 | } |
878 | ||
fe60a8a0 | 879 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 880 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 881 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 882 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
883 | |
884 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
885 | ||
886 | XFS_STATS_INC(xs_ig_attrchg); | |
887 | ||
888 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
889 | xfs_trans_set_sync(tp); | |
890 | ||
891 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
892 | out_unlock: | |
893 | if (lock_flags) | |
894 | xfs_iunlock(ip, lock_flags); | |
895 | return error; | |
896 | ||
897 | out_trans_abort: | |
898 | commit_flags |= XFS_TRANS_ABORT; | |
899 | out_trans_cancel: | |
900 | xfs_trans_cancel(tp, commit_flags); | |
901 | goto out_unlock; | |
902 | } | |
903 | ||
1da177e4 | 904 | STATIC int |
416c6d5b | 905 | xfs_vn_setattr( |
76ca4c23 CH |
906 | struct dentry *dentry, |
907 | struct iattr *iattr) | |
1da177e4 | 908 | { |
76ca4c23 CH |
909 | struct xfs_inode *ip = XFS_I(dentry->d_inode); |
910 | int error; | |
911 | ||
912 | if (iattr->ia_valid & ATTR_SIZE) { | |
913 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
914 | error = xfs_setattr_size(ip, iattr); | |
915 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
916 | } else { | |
917 | error = xfs_setattr_nonsize(ip, iattr, 0); | |
918 | } | |
919 | ||
920 | return -error; | |
1da177e4 LT |
921 | } |
922 | ||
69ff2826 CH |
923 | STATIC int |
924 | xfs_vn_update_time( | |
925 | struct inode *inode, | |
926 | struct timespec *now, | |
927 | int flags) | |
928 | { | |
929 | struct xfs_inode *ip = XFS_I(inode); | |
930 | struct xfs_mount *mp = ip->i_mount; | |
931 | struct xfs_trans *tp; | |
932 | int error; | |
933 | ||
934 | trace_xfs_update_time(ip); | |
935 | ||
936 | tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS); | |
3d3c8b52 | 937 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0); |
69ff2826 CH |
938 | if (error) { |
939 | xfs_trans_cancel(tp, 0); | |
940 | return -error; | |
941 | } | |
942 | ||
943 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
944 | if (flags & S_CTIME) { | |
945 | inode->i_ctime = *now; | |
946 | ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec; | |
947 | ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec; | |
948 | } | |
949 | if (flags & S_MTIME) { | |
950 | inode->i_mtime = *now; | |
951 | ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec; | |
952 | ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec; | |
953 | } | |
954 | if (flags & S_ATIME) { | |
955 | inode->i_atime = *now; | |
956 | ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec; | |
957 | ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec; | |
958 | } | |
959 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
960 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); | |
961 | return -xfs_trans_commit(tp, 0); | |
962 | } | |
963 | ||
f35642e2 ES |
964 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
965 | ||
966 | /* | |
967 | * Call fiemap helper to fill in user data. | |
968 | * Returns positive errors to xfs_getbmap. | |
969 | */ | |
970 | STATIC int | |
971 | xfs_fiemap_format( | |
972 | void **arg, | |
973 | struct getbmapx *bmv, | |
974 | int *full) | |
975 | { | |
976 | int error; | |
977 | struct fiemap_extent_info *fieinfo = *arg; | |
978 | u32 fiemap_flags = 0; | |
979 | u64 logical, physical, length; | |
980 | ||
981 | /* Do nothing for a hole */ | |
982 | if (bmv->bmv_block == -1LL) | |
983 | return 0; | |
984 | ||
985 | logical = BBTOB(bmv->bmv_offset); | |
986 | physical = BBTOB(bmv->bmv_block); | |
987 | length = BBTOB(bmv->bmv_length); | |
988 | ||
989 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) | |
990 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; | |
991 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { | |
635c4d0b JL |
992 | fiemap_flags |= (FIEMAP_EXTENT_DELALLOC | |
993 | FIEMAP_EXTENT_UNKNOWN); | |
f35642e2 ES |
994 | physical = 0; /* no block yet */ |
995 | } | |
996 | if (bmv->bmv_oflags & BMV_OF_LAST) | |
997 | fiemap_flags |= FIEMAP_EXTENT_LAST; | |
998 | ||
999 | error = fiemap_fill_next_extent(fieinfo, logical, physical, | |
1000 | length, fiemap_flags); | |
1001 | if (error > 0) { | |
1002 | error = 0; | |
1003 | *full = 1; /* user array now full */ | |
1004 | } | |
1005 | ||
1006 | return -error; | |
1007 | } | |
1008 | ||
1009 | STATIC int | |
1010 | xfs_vn_fiemap( | |
1011 | struct inode *inode, | |
1012 | struct fiemap_extent_info *fieinfo, | |
1013 | u64 start, | |
1014 | u64 length) | |
1015 | { | |
1016 | xfs_inode_t *ip = XFS_I(inode); | |
1017 | struct getbmapx bm; | |
1018 | int error; | |
1019 | ||
1020 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); | |
1021 | if (error) | |
1022 | return error; | |
1023 | ||
1024 | /* Set up bmap header for xfs internal routine */ | |
1025 | bm.bmv_offset = BTOBB(start); | |
1026 | /* Special case for whole file */ | |
1027 | if (length == FIEMAP_MAX_OFFSET) | |
1028 | bm.bmv_length = -1LL; | |
1029 | else | |
1030 | bm.bmv_length = BTOBB(length); | |
1031 | ||
97db39a1 | 1032 | /* We add one because in getbmap world count includes the header */ |
2d1ff3c7 TM |
1033 | bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : |
1034 | fieinfo->fi_extents_max + 1; | |
1035 | bm.bmv_count = min_t(__s32, bm.bmv_count, | |
1036 | (PAGE_SIZE * 16 / sizeof(struct getbmapx))); | |
9af25465 | 1037 | bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; |
f35642e2 ES |
1038 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) |
1039 | bm.bmv_iflags |= BMV_IF_ATTRFORK; | |
1040 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) | |
1041 | bm.bmv_iflags |= BMV_IF_DELALLOC; | |
1042 | ||
1043 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); | |
1044 | if (error) | |
1045 | return -error; | |
1046 | ||
1047 | return 0; | |
1048 | } | |
1049 | ||
99b6436b ZYW |
1050 | STATIC int |
1051 | xfs_vn_tmpfile( | |
1052 | struct inode *dir, | |
1053 | struct dentry *dentry, | |
1054 | umode_t mode) | |
1055 | { | |
1056 | int error; | |
1057 | ||
1058 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode); | |
1059 | ||
1060 | return -error; | |
1061 | } | |
1062 | ||
41be8bed | 1063 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1064 | .get_acl = xfs_get_acl, |
2401dc29 | 1065 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1066 | .getattr = xfs_vn_getattr, |
1067 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1068 | .setxattr = generic_setxattr, |
1069 | .getxattr = generic_getxattr, | |
1070 | .removexattr = generic_removexattr, | |
416c6d5b | 1071 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1072 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1073 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1074 | }; |
1075 | ||
41be8bed | 1076 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1077 | .create = xfs_vn_create, |
1078 | .lookup = xfs_vn_lookup, | |
1079 | .link = xfs_vn_link, | |
1080 | .unlink = xfs_vn_unlink, | |
1081 | .symlink = xfs_vn_symlink, | |
1082 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1083 | /* |
1084 | * Yes, XFS uses the same method for rmdir and unlink. | |
1085 | * | |
1086 | * There are some subtile differences deeper in the code, | |
1087 | * but we use S_ISDIR to check for those. | |
1088 | */ | |
1089 | .rmdir = xfs_vn_unlink, | |
416c6d5b NS |
1090 | .mknod = xfs_vn_mknod, |
1091 | .rename = xfs_vn_rename, | |
4e34e719 | 1092 | .get_acl = xfs_get_acl, |
2401dc29 | 1093 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1094 | .getattr = xfs_vn_getattr, |
1095 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1096 | .setxattr = generic_setxattr, |
1097 | .getxattr = generic_getxattr, | |
1098 | .removexattr = generic_removexattr, | |
416c6d5b | 1099 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1100 | .update_time = xfs_vn_update_time, |
99b6436b | 1101 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1102 | }; |
1103 | ||
41be8bed | 1104 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1105 | .create = xfs_vn_create, |
1106 | .lookup = xfs_vn_ci_lookup, | |
1107 | .link = xfs_vn_link, | |
1108 | .unlink = xfs_vn_unlink, | |
1109 | .symlink = xfs_vn_symlink, | |
1110 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1111 | /* |
1112 | * Yes, XFS uses the same method for rmdir and unlink. | |
1113 | * | |
1114 | * There are some subtile differences deeper in the code, | |
1115 | * but we use S_ISDIR to check for those. | |
1116 | */ | |
1117 | .rmdir = xfs_vn_unlink, | |
384f3ced BN |
1118 | .mknod = xfs_vn_mknod, |
1119 | .rename = xfs_vn_rename, | |
4e34e719 | 1120 | .get_acl = xfs_get_acl, |
2401dc29 | 1121 | .set_acl = xfs_set_acl, |
384f3ced BN |
1122 | .getattr = xfs_vn_getattr, |
1123 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1124 | .setxattr = generic_setxattr, |
1125 | .getxattr = generic_getxattr, | |
1126 | .removexattr = generic_removexattr, | |
384f3ced | 1127 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1128 | .update_time = xfs_vn_update_time, |
99b6436b | 1129 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1130 | }; |
1131 | ||
41be8bed | 1132 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 1133 | .readlink = generic_readlink, |
416c6d5b | 1134 | .follow_link = xfs_vn_follow_link, |
96c8c442 | 1135 | .put_link = kfree_put_link, |
416c6d5b NS |
1136 | .getattr = xfs_vn_getattr, |
1137 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1138 | .setxattr = generic_setxattr, |
1139 | .getxattr = generic_getxattr, | |
1140 | .removexattr = generic_removexattr, | |
416c6d5b | 1141 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1142 | .update_time = xfs_vn_update_time, |
1da177e4 | 1143 | }; |
41be8bed CH |
1144 | |
1145 | STATIC void | |
1146 | xfs_diflags_to_iflags( | |
1147 | struct inode *inode, | |
1148 | struct xfs_inode *ip) | |
1149 | { | |
1150 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
1151 | inode->i_flags |= S_IMMUTABLE; | |
1152 | else | |
1153 | inode->i_flags &= ~S_IMMUTABLE; | |
1154 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
1155 | inode->i_flags |= S_APPEND; | |
1156 | else | |
1157 | inode->i_flags &= ~S_APPEND; | |
1158 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
1159 | inode->i_flags |= S_SYNC; | |
1160 | else | |
1161 | inode->i_flags &= ~S_SYNC; | |
1162 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
1163 | inode->i_flags |= S_NOATIME; | |
1164 | else | |
1165 | inode->i_flags &= ~S_NOATIME; | |
1166 | } | |
1167 | ||
1168 | /* | |
1169 | * Initialize the Linux inode, set up the operation vectors and | |
1170 | * unlock the inode. | |
1171 | * | |
1172 | * When reading existing inodes from disk this is called directly | |
1173 | * from xfs_iget, when creating a new inode it is called from | |
1174 | * xfs_ialloc after setting up the inode. | |
bf904248 DC |
1175 | * |
1176 | * We are always called with an uninitialised linux inode here. | |
1177 | * We need to initialise the necessary fields and take a reference | |
1178 | * on it. | |
41be8bed CH |
1179 | */ |
1180 | void | |
1181 | xfs_setup_inode( | |
1182 | struct xfs_inode *ip) | |
1183 | { | |
bf904248 | 1184 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1185 | gfp_t gfp_mask; |
bf904248 DC |
1186 | |
1187 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1188 | inode->i_state = I_NEW; |
646ec461 CH |
1189 | |
1190 | inode_sb_list_add(inode); | |
c6f6cd06 CH |
1191 | /* make the inode look hashed for the writeback code */ |
1192 | hlist_add_fake(&inode->i_hash); | |
41be8bed CH |
1193 | |
1194 | inode->i_mode = ip->i_d.di_mode; | |
bfe86848 | 1195 | set_nlink(inode, ip->i_d.di_nlink); |
7aab1b28 DE |
1196 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1197 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed CH |
1198 | |
1199 | switch (inode->i_mode & S_IFMT) { | |
1200 | case S_IFBLK: | |
1201 | case S_IFCHR: | |
1202 | inode->i_rdev = | |
1203 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
1204 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
1205 | break; | |
1206 | default: | |
1207 | inode->i_rdev = 0; | |
1208 | break; | |
1209 | } | |
1210 | ||
1211 | inode->i_generation = ip->i_d.di_gen; | |
1212 | i_size_write(inode, ip->i_d.di_size); | |
1213 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
1214 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
1215 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
1216 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
1217 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
1218 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
1219 | xfs_diflags_to_iflags(inode, ip); | |
41be8bed | 1220 | |
4bceb18f | 1221 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; |
93a8614e | 1222 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); |
41be8bed CH |
1223 | switch (inode->i_mode & S_IFMT) { |
1224 | case S_IFREG: | |
1225 | inode->i_op = &xfs_inode_operations; | |
1226 | inode->i_fop = &xfs_file_operations; | |
1227 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1228 | break; | |
1229 | case S_IFDIR: | |
93a8614e | 1230 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
41be8bed CH |
1231 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) |
1232 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1233 | else | |
1234 | inode->i_op = &xfs_dir_inode_operations; | |
1235 | inode->i_fop = &xfs_dir_file_operations; | |
32c5483a | 1236 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
41be8bed CH |
1237 | break; |
1238 | case S_IFLNK: | |
1239 | inode->i_op = &xfs_symlink_inode_operations; | |
1240 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) | |
1241 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1242 | break; | |
1243 | default: | |
1244 | inode->i_op = &xfs_inode_operations; | |
1245 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1246 | break; | |
1247 | } | |
1248 | ||
ad22c7a0 DC |
1249 | /* |
1250 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1251 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1252 | * stacks or deadlocking. | |
1253 | */ | |
1254 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1255 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1256 | ||
510792ee CH |
1257 | /* |
1258 | * If there is no attribute fork no ACL can exist on this inode, | |
1259 | * and it can't have any file capabilities attached to it either. | |
1260 | */ | |
1261 | if (!XFS_IFORK_Q(ip)) { | |
1262 | inode_has_no_xattr(inode); | |
6311b108 | 1263 | cache_no_acl(inode); |
510792ee | 1264 | } |
6311b108 | 1265 | |
41be8bed CH |
1266 | xfs_iflags_clear(ip, XFS_INEW); |
1267 | barrier(); | |
1268 | ||
1269 | unlock_new_inode(inode); | |
1270 | } |