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 | 24 | #include "xfs_mount.h" |
57062787 | 25 | #include "xfs_da_format.h" |
1da177e4 LT |
26 | #include "xfs_inode.h" |
27 | #include "xfs_bmap.h" | |
68988114 | 28 | #include "xfs_bmap_util.h" |
239880ef | 29 | #include "xfs_acl.h" |
239880ef | 30 | #include "xfs_quota.h" |
1da177e4 | 31 | #include "xfs_error.h" |
1da177e4 | 32 | #include "xfs_attr.h" |
239880ef | 33 | #include "xfs_trans.h" |
0b1b213f | 34 | #include "xfs_trace.h" |
27b52867 | 35 | #include "xfs_icache.h" |
c24b5dfa | 36 | #include "xfs_symlink.h" |
0cb97766 | 37 | #include "xfs_da_btree.h" |
1b767ee3 | 38 | #include "xfs_dir2.h" |
99b6436b | 39 | #include "xfs_trans_space.h" |
1da177e4 | 40 | |
16f7e0fe | 41 | #include <linux/capability.h> |
1da177e4 LT |
42 | #include <linux/xattr.h> |
43 | #include <linux/namei.h> | |
ef14f0c1 | 44 | #include <linux/posix_acl.h> |
446ada4a | 45 | #include <linux/security.h> |
f35642e2 | 46 | #include <linux/fiemap.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
1da177e4 | 48 | |
93a8614e DC |
49 | /* |
50 | * Directories have different lock order w.r.t. mmap_sem compared to regular | |
51 | * files. This is due to readdir potentially triggering page faults on a user | |
52 | * buffer inside filldir(), and this happens with the ilock on the directory | |
53 | * held. For regular files, the lock order is the other way around - the | |
54 | * mmap_sem is taken during the page fault, and then we lock the ilock to do | |
55 | * block mapping. Hence we need a different class for the directory ilock so | |
56 | * that lockdep can tell them apart. | |
57 | */ | |
58 | static struct lock_class_key xfs_nondir_ilock_class; | |
59 | static struct lock_class_key xfs_dir_ilock_class; | |
60 | ||
8d2a5e6e DC |
61 | static int |
62 | xfs_initxattrs( | |
63 | struct inode *inode, | |
64 | const struct xattr *xattr_array, | |
65 | void *fs_info) | |
9d8f13ba | 66 | { |
8d2a5e6e DC |
67 | const struct xattr *xattr; |
68 | struct xfs_inode *ip = XFS_I(inode); | |
69 | int error = 0; | |
9d8f13ba MZ |
70 | |
71 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
2451337d | 72 | error = xfs_attr_set(ip, xattr->name, xattr->value, |
a5a14de2 | 73 | xattr->value_len, ATTR_SECURE); |
9d8f13ba MZ |
74 | if (error < 0) |
75 | break; | |
76 | } | |
77 | return error; | |
78 | } | |
79 | ||
446ada4a NS |
80 | /* |
81 | * Hook in SELinux. This is not quite correct yet, what we really need | |
82 | * here (as we do for default ACLs) is a mechanism by which creation of | |
83 | * these attrs can be journalled at inode creation time (along with the | |
84 | * inode, of course, such that log replay can't cause these to be lost). | |
85 | */ | |
9d8f13ba | 86 | |
446ada4a | 87 | STATIC int |
416c6d5b | 88 | xfs_init_security( |
af048193 | 89 | struct inode *inode, |
2a7dba39 EP |
90 | struct inode *dir, |
91 | const struct qstr *qstr) | |
446ada4a | 92 | { |
2451337d | 93 | return security_inode_init_security(inode, dir, qstr, |
a5a14de2 | 94 | &xfs_initxattrs, NULL); |
446ada4a NS |
95 | } |
96 | ||
556b8b16 BN |
97 | static void |
98 | xfs_dentry_to_name( | |
99 | struct xfs_name *namep, | |
0cb97766 DC |
100 | struct dentry *dentry, |
101 | int mode) | |
556b8b16 BN |
102 | { |
103 | namep->name = dentry->d_name.name; | |
104 | namep->len = dentry->d_name.len; | |
0cb97766 | 105 | namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT]; |
556b8b16 BN |
106 | } |
107 | ||
7989cb8e | 108 | STATIC void |
416c6d5b | 109 | xfs_cleanup_inode( |
739bfb2a | 110 | struct inode *dir, |
af048193 | 111 | struct inode *inode, |
8f112e3b | 112 | struct dentry *dentry) |
3a69c7dc | 113 | { |
556b8b16 | 114 | struct xfs_name teardown; |
3a69c7dc YL |
115 | |
116 | /* Oh, the horror. | |
220b5284 | 117 | * If we can't add the ACL or we fail in |
416c6d5b | 118 | * xfs_init_security we must back out. |
3a69c7dc YL |
119 | * ENOSPC can hit here, among other things. |
120 | */ | |
0cb97766 | 121 | xfs_dentry_to_name(&teardown, dentry, 0); |
3a69c7dc | 122 | |
8f112e3b | 123 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
3a69c7dc YL |
124 | } |
125 | ||
1da177e4 | 126 | STATIC int |
d540e43b | 127 | xfs_generic_create( |
1da177e4 LT |
128 | struct inode *dir, |
129 | struct dentry *dentry, | |
1a67aafb | 130 | umode_t mode, |
d540e43b BF |
131 | dev_t rdev, |
132 | bool tmpfile) /* unnamed file */ | |
1da177e4 | 133 | { |
db0bb7ba | 134 | struct inode *inode; |
979ebab1 | 135 | struct xfs_inode *ip = NULL; |
2401dc29 | 136 | struct posix_acl *default_acl, *acl; |
556b8b16 | 137 | struct xfs_name name; |
1da177e4 LT |
138 | int error; |
139 | ||
140 | /* | |
141 | * Irix uses Missed'em'V split, but doesn't want to see | |
142 | * the upper 5 bits of (14bit) major. | |
143 | */ | |
517b5e8c CH |
144 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
145 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
146 | return -EINVAL; | |
147 | rdev = sysv_encode_dev(rdev); | |
148 | } else { | |
149 | rdev = 0; | |
150 | } | |
1da177e4 | 151 | |
2401dc29 CH |
152 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
153 | if (error) | |
154 | return error; | |
1da177e4 | 155 | |
d540e43b BF |
156 | if (!tmpfile) { |
157 | xfs_dentry_to_name(&name, dentry, mode); | |
158 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); | |
159 | } else { | |
160 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); | |
161 | } | |
db0bb7ba CH |
162 | if (unlikely(error)) |
163 | goto out_free_acl; | |
446ada4a | 164 | |
01651646 | 165 | inode = VFS_I(ip); |
979ebab1 | 166 | |
2a7dba39 | 167 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
168 | if (unlikely(error)) |
169 | goto out_cleanup_inode; | |
170 | ||
2401dc29 | 171 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 172 | if (default_acl) { |
2451337d | 173 | error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
2401dc29 | 174 | if (error) |
db0bb7ba | 175 | goto out_cleanup_inode; |
1da177e4 | 176 | } |
2401dc29 | 177 | if (acl) { |
2451337d | 178 | error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
2401dc29 CH |
179 | if (error) |
180 | goto out_cleanup_inode; | |
181 | } | |
182 | #endif | |
1da177e4 | 183 | |
d540e43b BF |
184 | if (tmpfile) |
185 | d_tmpfile(dentry, inode); | |
186 | else | |
187 | d_instantiate(dentry, inode); | |
188 | ||
2401dc29 CH |
189 | out_free_acl: |
190 | if (default_acl) | |
191 | posix_acl_release(default_acl); | |
192 | if (acl) | |
193 | posix_acl_release(acl); | |
2451337d | 194 | return error; |
db0bb7ba CH |
195 | |
196 | out_cleanup_inode: | |
d540e43b BF |
197 | if (!tmpfile) |
198 | xfs_cleanup_inode(dir, inode, dentry); | |
199 | iput(inode); | |
2401dc29 | 200 | goto out_free_acl; |
1da177e4 LT |
201 | } |
202 | ||
d540e43b BF |
203 | STATIC int |
204 | xfs_vn_mknod( | |
205 | struct inode *dir, | |
206 | struct dentry *dentry, | |
207 | umode_t mode, | |
208 | dev_t rdev) | |
209 | { | |
210 | return xfs_generic_create(dir, dentry, mode, rdev, false); | |
211 | } | |
212 | ||
1da177e4 | 213 | STATIC int |
416c6d5b | 214 | xfs_vn_create( |
1da177e4 LT |
215 | struct inode *dir, |
216 | struct dentry *dentry, | |
4acdaf27 | 217 | umode_t mode, |
ebfc3b49 | 218 | bool flags) |
1da177e4 | 219 | { |
416c6d5b | 220 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
221 | } |
222 | ||
223 | STATIC int | |
416c6d5b | 224 | xfs_vn_mkdir( |
1da177e4 LT |
225 | struct inode *dir, |
226 | struct dentry *dentry, | |
18bb1db3 | 227 | umode_t mode) |
1da177e4 | 228 | { |
416c6d5b | 229 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
230 | } |
231 | ||
232 | STATIC struct dentry * | |
416c6d5b | 233 | xfs_vn_lookup( |
1da177e4 LT |
234 | struct inode *dir, |
235 | struct dentry *dentry, | |
00cd8dd3 | 236 | unsigned int flags) |
1da177e4 | 237 | { |
ef1f5e7a | 238 | struct xfs_inode *cip; |
556b8b16 | 239 | struct xfs_name name; |
1da177e4 LT |
240 | int error; |
241 | ||
242 | if (dentry->d_name.len >= MAXNAMELEN) | |
243 | return ERR_PTR(-ENAMETOOLONG); | |
244 | ||
0cb97766 | 245 | xfs_dentry_to_name(&name, dentry, 0); |
384f3ced | 246 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 247 | if (unlikely(error)) { |
2451337d DC |
248 | if (unlikely(error != -ENOENT)) |
249 | return ERR_PTR(error); | |
1da177e4 LT |
250 | d_add(dentry, NULL); |
251 | return NULL; | |
252 | } | |
253 | ||
01651646 | 254 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
255 | } |
256 | ||
384f3ced BN |
257 | STATIC struct dentry * |
258 | xfs_vn_ci_lookup( | |
259 | struct inode *dir, | |
260 | struct dentry *dentry, | |
00cd8dd3 | 261 | unsigned int flags) |
384f3ced BN |
262 | { |
263 | struct xfs_inode *ip; | |
264 | struct xfs_name xname; | |
265 | struct xfs_name ci_name; | |
266 | struct qstr dname; | |
267 | int error; | |
268 | ||
269 | if (dentry->d_name.len >= MAXNAMELEN) | |
270 | return ERR_PTR(-ENAMETOOLONG); | |
271 | ||
0cb97766 | 272 | xfs_dentry_to_name(&xname, dentry, 0); |
384f3ced BN |
273 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
274 | if (unlikely(error)) { | |
2451337d DC |
275 | if (unlikely(error != -ENOENT)) |
276 | return ERR_PTR(error); | |
866d5dc9 BN |
277 | /* |
278 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
279 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
280 | * with CI filesystems). | |
281 | */ | |
384f3ced BN |
282 | return NULL; |
283 | } | |
284 | ||
285 | /* if exact match, just splice and exit */ | |
286 | if (!ci_name.name) | |
01651646 | 287 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
288 | |
289 | /* else case-insensitive match... */ | |
290 | dname.name = ci_name.name; | |
291 | dname.len = ci_name.len; | |
e45b590b | 292 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
293 | kmem_free(ci_name.name); |
294 | return dentry; | |
295 | } | |
296 | ||
1da177e4 | 297 | STATIC int |
416c6d5b | 298 | xfs_vn_link( |
1da177e4 LT |
299 | struct dentry *old_dentry, |
300 | struct inode *dir, | |
301 | struct dentry *dentry) | |
302 | { | |
d9424b3c | 303 | struct inode *inode = old_dentry->d_inode; |
556b8b16 | 304 | struct xfs_name name; |
1da177e4 LT |
305 | int error; |
306 | ||
0cb97766 | 307 | xfs_dentry_to_name(&name, dentry, inode->i_mode); |
1da177e4 | 308 | |
556b8b16 | 309 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 310 | if (unlikely(error)) |
2451337d | 311 | return error; |
a3da7896 | 312 | |
7de9c6ee | 313 | ihold(inode); |
a3da7896 CH |
314 | d_instantiate(dentry, inode); |
315 | return 0; | |
1da177e4 LT |
316 | } |
317 | ||
318 | STATIC int | |
416c6d5b | 319 | xfs_vn_unlink( |
1da177e4 LT |
320 | struct inode *dir, |
321 | struct dentry *dentry) | |
322 | { | |
556b8b16 | 323 | struct xfs_name name; |
1da177e4 LT |
324 | int error; |
325 | ||
0cb97766 | 326 | xfs_dentry_to_name(&name, dentry, 0); |
1da177e4 | 327 | |
2451337d | 328 | error = xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); |
e5700704 CH |
329 | if (error) |
330 | return error; | |
331 | ||
332 | /* | |
333 | * With unlink, the VFS makes the dentry "negative": no inode, | |
334 | * but still hashed. This is incompatible with case-insensitive | |
335 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
336 | */ | |
337 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
338 | d_invalidate(dentry); | |
339 | return 0; | |
1da177e4 LT |
340 | } |
341 | ||
342 | STATIC int | |
416c6d5b | 343 | xfs_vn_symlink( |
1da177e4 LT |
344 | struct inode *dir, |
345 | struct dentry *dentry, | |
346 | const char *symname) | |
347 | { | |
3937be5b CH |
348 | struct inode *inode; |
349 | struct xfs_inode *cip = NULL; | |
556b8b16 | 350 | struct xfs_name name; |
1da177e4 | 351 | int error; |
576b1d67 | 352 | umode_t mode; |
1da177e4 | 353 | |
3e5daf05 | 354 | mode = S_IFLNK | |
ce3b0f8d | 355 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
0cb97766 | 356 | xfs_dentry_to_name(&name, dentry, mode); |
1da177e4 | 357 | |
6c77b0ea | 358 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
359 | if (unlikely(error)) |
360 | goto out; | |
361 | ||
01651646 | 362 | inode = VFS_I(cip); |
3937be5b | 363 | |
2a7dba39 | 364 | error = xfs_init_security(inode, dir, &dentry->d_name); |
3937be5b CH |
365 | if (unlikely(error)) |
366 | goto out_cleanup_inode; | |
367 | ||
368 | d_instantiate(dentry, inode); | |
3937be5b CH |
369 | return 0; |
370 | ||
371 | out_cleanup_inode: | |
8f112e3b | 372 | xfs_cleanup_inode(dir, inode, dentry); |
d540e43b | 373 | iput(inode); |
3937be5b | 374 | out: |
2451337d | 375 | return error; |
1da177e4 LT |
376 | } |
377 | ||
1da177e4 | 378 | STATIC int |
416c6d5b | 379 | xfs_vn_rename( |
1da177e4 LT |
380 | struct inode *odir, |
381 | struct dentry *odentry, | |
382 | struct inode *ndir, | |
383 | struct dentry *ndentry) | |
384 | { | |
385 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
386 | struct xfs_name oname; |
387 | struct xfs_name nname; | |
1da177e4 | 388 | |
0cb97766 DC |
389 | xfs_dentry_to_name(&oname, odentry, 0); |
390 | xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode); | |
556b8b16 | 391 | |
2451337d DC |
392 | return xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
393 | XFS_I(ndir), &nname, new_inode ? | |
0cb97766 | 394 | XFS_I(new_inode) : NULL); |
1da177e4 LT |
395 | } |
396 | ||
397 | /* | |
398 | * careful here - this function can get called recursively, so | |
399 | * we need to be very careful about how much stack we use. | |
400 | * uio is kmalloced for this reason... | |
401 | */ | |
008b150a | 402 | STATIC void * |
416c6d5b | 403 | xfs_vn_follow_link( |
1da177e4 LT |
404 | struct dentry *dentry, |
405 | struct nameidata *nd) | |
406 | { | |
1da177e4 | 407 | char *link; |
804c83c3 | 408 | int error = -ENOMEM; |
1da177e4 | 409 | |
f52720ca | 410 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
411 | if (!link) |
412 | goto out_err; | |
1da177e4 | 413 | |
2451337d | 414 | error = xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
415 | if (unlikely(error)) |
416 | goto out_kfree; | |
1da177e4 LT |
417 | |
418 | nd_set_link(nd, link); | |
008b150a | 419 | return NULL; |
804c83c3 CH |
420 | |
421 | out_kfree: | |
422 | kfree(link); | |
423 | out_err: | |
424 | nd_set_link(nd, ERR_PTR(error)); | |
425 | return NULL; | |
1da177e4 LT |
426 | } |
427 | ||
1da177e4 | 428 | STATIC int |
416c6d5b | 429 | xfs_vn_getattr( |
c43f4087 CH |
430 | struct vfsmount *mnt, |
431 | struct dentry *dentry, | |
432 | struct kstat *stat) | |
1da177e4 | 433 | { |
c43f4087 CH |
434 | struct inode *inode = dentry->d_inode; |
435 | struct xfs_inode *ip = XFS_I(inode); | |
436 | struct xfs_mount *mp = ip->i_mount; | |
437 | ||
cca28fb8 | 438 | trace_xfs_getattr(ip); |
c43f4087 CH |
439 | |
440 | if (XFS_FORCED_SHUTDOWN(mp)) | |
b474c7ae | 441 | return -EIO; |
c43f4087 CH |
442 | |
443 | stat->size = XFS_ISIZE(ip); | |
444 | stat->dev = inode->i_sb->s_dev; | |
445 | stat->mode = ip->i_d.di_mode; | |
446 | stat->nlink = ip->i_d.di_nlink; | |
7aab1b28 DE |
447 | stat->uid = inode->i_uid; |
448 | stat->gid = inode->i_gid; | |
c43f4087 | 449 | stat->ino = ip->i_ino; |
c43f4087 | 450 | stat->atime = inode->i_atime; |
f9581b14 CH |
451 | stat->mtime = inode->i_mtime; |
452 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
453 | stat->blocks = |
454 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
455 | ||
456 | ||
457 | switch (inode->i_mode & S_IFMT) { | |
458 | case S_IFBLK: | |
459 | case S_IFCHR: | |
460 | stat->blksize = BLKDEV_IOSIZE; | |
461 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
462 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
463 | break; | |
464 | default: | |
71ddabb9 | 465 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
466 | /* |
467 | * If the file blocks are being allocated from a | |
468 | * realtime volume, then return the inode's realtime | |
469 | * extent size or the realtime volume's extent size. | |
470 | */ | |
471 | stat->blksize = | |
472 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
473 | } else | |
474 | stat->blksize = xfs_preferred_iosize(mp); | |
475 | stat->rdev = 0; | |
476 | break; | |
69e23b9a | 477 | } |
c43f4087 CH |
478 | |
479 | return 0; | |
1da177e4 LT |
480 | } |
481 | ||
56c19e89 DC |
482 | static void |
483 | xfs_setattr_mode( | |
56c19e89 DC |
484 | struct xfs_inode *ip, |
485 | struct iattr *iattr) | |
486 | { | |
0c3d88df CH |
487 | struct inode *inode = VFS_I(ip); |
488 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 489 | |
56c19e89 DC |
490 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
491 | ||
56c19e89 DC |
492 | ip->i_d.di_mode &= S_IFMT; |
493 | ip->i_d.di_mode |= mode & ~S_IFMT; | |
494 | ||
495 | inode->i_mode &= S_IFMT; | |
496 | inode->i_mode |= mode & ~S_IFMT; | |
497 | } | |
498 | ||
c91c46c1 CH |
499 | static void |
500 | xfs_setattr_time( | |
501 | struct xfs_inode *ip, | |
502 | struct iattr *iattr) | |
503 | { | |
504 | struct inode *inode = VFS_I(ip); | |
505 | ||
506 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
507 | ||
508 | if (iattr->ia_valid & ATTR_ATIME) { | |
509 | inode->i_atime = iattr->ia_atime; | |
510 | ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; | |
511 | ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; | |
512 | } | |
513 | if (iattr->ia_valid & ATTR_CTIME) { | |
514 | inode->i_ctime = iattr->ia_ctime; | |
515 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; | |
516 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; | |
517 | } | |
518 | if (iattr->ia_valid & ATTR_MTIME) { | |
519 | inode->i_mtime = iattr->ia_mtime; | |
520 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; | |
521 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; | |
522 | } | |
523 | } | |
524 | ||
c4ed4243 CH |
525 | int |
526 | xfs_setattr_nonsize( | |
527 | struct xfs_inode *ip, | |
528 | struct iattr *iattr, | |
529 | int flags) | |
530 | { | |
531 | xfs_mount_t *mp = ip->i_mount; | |
532 | struct inode *inode = VFS_I(ip); | |
533 | int mask = iattr->ia_valid; | |
534 | xfs_trans_t *tp; | |
535 | int error; | |
7aab1b28 DE |
536 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
537 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
538 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
539 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
540 | ||
541 | trace_xfs_setattr(ip); | |
542 | ||
42c49d7f CM |
543 | /* If acls are being inherited, we already have this checked */ |
544 | if (!(flags & XFS_ATTR_NOACL)) { | |
545 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
2451337d | 546 | return -EROFS; |
c4ed4243 | 547 | |
42c49d7f | 548 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 549 | return -EIO; |
c4ed4243 | 550 | |
2451337d | 551 | error = inode_change_ok(inode, iattr); |
42c49d7f | 552 | if (error) |
b474c7ae | 553 | return error; |
42c49d7f | 554 | } |
c4ed4243 CH |
555 | |
556 | ASSERT((mask & ATTR_SIZE) == 0); | |
557 | ||
558 | /* | |
559 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
560 | * before we start any other transactions. Trying to do this later | |
561 | * is messy. We don't care to take a readlock to look at the ids | |
562 | * in inode here, because we can't hold it across the trans_reserve. | |
563 | * If the IDs do change before we take the ilock, we're covered | |
564 | * because the i_*dquot fields will get updated anyway. | |
565 | */ | |
566 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
567 | uint qflags = 0; | |
568 | ||
569 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
570 | uid = iattr->ia_uid; | |
571 | qflags |= XFS_QMOPT_UQUOTA; | |
572 | } else { | |
7aab1b28 | 573 | uid = inode->i_uid; |
c4ed4243 CH |
574 | } |
575 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
576 | gid = iattr->ia_gid; | |
577 | qflags |= XFS_QMOPT_GQUOTA; | |
578 | } else { | |
7aab1b28 | 579 | gid = inode->i_gid; |
c4ed4243 CH |
580 | } |
581 | ||
582 | /* | |
583 | * We take a reference when we initialize udqp and gdqp, | |
584 | * so it is important that we never blindly double trip on | |
585 | * the same variable. See xfs_create() for an example. | |
586 | */ | |
587 | ASSERT(udqp == NULL); | |
588 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
589 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
590 | xfs_kgid_to_gid(gid), | |
591 | xfs_get_projid(ip), | |
592 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
593 | if (error) |
594 | return error; | |
595 | } | |
596 | ||
597 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); | |
3d3c8b52 | 598 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); |
c4ed4243 CH |
599 | if (error) |
600 | goto out_dqrele; | |
601 | ||
602 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
603 | ||
604 | /* | |
605 | * Change file ownership. Must be the owner or privileged. | |
606 | */ | |
607 | if (mask & (ATTR_UID|ATTR_GID)) { | |
608 | /* | |
609 | * These IDs could have changed since we last looked at them. | |
610 | * But, we're assured that if the ownership did change | |
611 | * while we didn't have the inode locked, inode's dquot(s) | |
612 | * would have changed also. | |
613 | */ | |
7aab1b28 DE |
614 | iuid = inode->i_uid; |
615 | igid = inode->i_gid; | |
c4ed4243 CH |
616 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
617 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
618 | ||
619 | /* | |
620 | * Do a quota reservation only if uid/gid is actually | |
621 | * going to change. | |
622 | */ | |
623 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
624 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
625 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
626 | ASSERT(tp); |
627 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 628 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
629 | XFS_QMOPT_FORCE_RES : 0); |
630 | if (error) /* out of quota */ | |
631 | goto out_trans_cancel; | |
632 | } | |
633 | } | |
634 | ||
ddc3415a | 635 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
636 | |
637 | /* | |
638 | * Change file ownership. Must be the owner or privileged. | |
639 | */ | |
640 | if (mask & (ATTR_UID|ATTR_GID)) { | |
641 | /* | |
642 | * CAP_FSETID overrides the following restrictions: | |
643 | * | |
644 | * The set-user-ID and set-group-ID bits of a file will be | |
645 | * cleared upon successful return from chown() | |
646 | */ | |
647 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
648 | !capable(CAP_FSETID)) | |
649 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
650 | ||
651 | /* | |
652 | * Change the ownerships and register quota modifications | |
653 | * in the transaction. | |
654 | */ | |
7aab1b28 | 655 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
656 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
657 | ASSERT(mask & ATTR_UID); | |
658 | ASSERT(udqp); | |
659 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
660 | &ip->i_udquot, udqp); | |
661 | } | |
7aab1b28 | 662 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
663 | inode->i_uid = uid; |
664 | } | |
7aab1b28 | 665 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 666 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
667 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
668 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
669 | ASSERT(mask & ATTR_GID); |
670 | ASSERT(gdqp); | |
671 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
672 | &ip->i_gdquot, gdqp); | |
673 | } | |
7aab1b28 | 674 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
675 | inode->i_gid = gid; |
676 | } | |
677 | } | |
678 | ||
56c19e89 | 679 | if (mask & ATTR_MODE) |
0c3d88df | 680 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
681 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
682 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
683 | |
684 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
685 | ||
686 | XFS_STATS_INC(xs_ig_attrchg); | |
687 | ||
688 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
689 | xfs_trans_set_sync(tp); | |
690 | error = xfs_trans_commit(tp, 0); | |
691 | ||
692 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
693 | ||
694 | /* | |
695 | * Release any dquot(s) the inode had kept before chown. | |
696 | */ | |
697 | xfs_qm_dqrele(olddquot1); | |
698 | xfs_qm_dqrele(olddquot2); | |
699 | xfs_qm_dqrele(udqp); | |
700 | xfs_qm_dqrele(gdqp); | |
701 | ||
702 | if (error) | |
b474c7ae | 703 | return error; |
c4ed4243 CH |
704 | |
705 | /* | |
706 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
707 | * update. We could avoid this with linked transactions | |
708 | * and passing down the transaction pointer all the way | |
709 | * to attr_set. No previous user of the generic | |
710 | * Posix ACL code seems to care about this issue either. | |
711 | */ | |
712 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2451337d | 713 | error = posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 | 714 | if (error) |
b474c7ae | 715 | return error; |
c4ed4243 CH |
716 | } |
717 | ||
718 | return 0; | |
719 | ||
720 | out_trans_cancel: | |
721 | xfs_trans_cancel(tp, 0); | |
722 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
723 | out_dqrele: | |
724 | xfs_qm_dqrele(udqp); | |
725 | xfs_qm_dqrele(gdqp); | |
726 | return error; | |
727 | } | |
728 | ||
729 | /* | |
730 | * Truncate file. Must have write permission and not be a directory. | |
731 | */ | |
732 | int | |
733 | xfs_setattr_size( | |
734 | struct xfs_inode *ip, | |
76ca4c23 | 735 | struct iattr *iattr) |
c4ed4243 CH |
736 | { |
737 | struct xfs_mount *mp = ip->i_mount; | |
738 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 739 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
740 | struct xfs_trans *tp; |
741 | int error; | |
f38996f5 | 742 | uint lock_flags = 0; |
c4ed4243 CH |
743 | uint commit_flags = 0; |
744 | ||
745 | trace_xfs_setattr(ip); | |
746 | ||
747 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
2451337d | 748 | return -EROFS; |
c4ed4243 CH |
749 | |
750 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 751 | return -EIO; |
c4ed4243 | 752 | |
2451337d | 753 | error = inode_change_ok(inode, iattr); |
c4ed4243 | 754 | if (error) |
b474c7ae | 755 | return error; |
c4ed4243 | 756 | |
76ca4c23 | 757 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
c4ed4243 | 758 | ASSERT(S_ISREG(ip->i_d.di_mode)); |
fe60a8a0 CH |
759 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
760 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 761 | |
ce7ae151 | 762 | oldsize = inode->i_size; |
673e8e59 CH |
763 | newsize = iattr->ia_size; |
764 | ||
c4ed4243 CH |
765 | /* |
766 | * Short circuit the truncate case for zero length files. | |
767 | */ | |
673e8e59 | 768 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 769 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 770 | return 0; |
681b1200 CH |
771 | |
772 | /* | |
773 | * Use the regular setattr path to update the timestamps. | |
774 | */ | |
681b1200 CH |
775 | iattr->ia_valid &= ~ATTR_SIZE; |
776 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
777 | } |
778 | ||
779 | /* | |
780 | * Make sure that the dquots are attached to the inode. | |
781 | */ | |
f38996f5 | 782 | error = xfs_qm_dqattach(ip, 0); |
c4ed4243 | 783 | if (error) |
76ca4c23 | 784 | return error; |
c4ed4243 CH |
785 | |
786 | /* | |
787 | * Now we can make the changes. Before we join the inode to the | |
788 | * transaction, take care of the part of the truncation that must be | |
789 | * done without the inode lock. This needs to be done before joining | |
790 | * the inode to the transaction, because the inode cannot be unlocked | |
791 | * once it is a part of the transaction. | |
792 | */ | |
673e8e59 | 793 | if (newsize > oldsize) { |
c4ed4243 CH |
794 | /* |
795 | * Do the first part of growing a file: zero any data in the | |
796 | * last block that is beyond the old EOF. We need to do this | |
797 | * before the inode is joined to the transaction to modify | |
798 | * i_size. | |
799 | */ | |
673e8e59 | 800 | error = xfs_zero_eof(ip, newsize, oldsize); |
c4ed4243 | 801 | if (error) |
76ca4c23 | 802 | return error; |
c4ed4243 | 803 | } |
c4ed4243 CH |
804 | |
805 | /* | |
806 | * We are going to log the inode size change in this transaction so | |
807 | * any previous writes that are beyond the on disk EOF and the new | |
808 | * EOF that have not been written out need to be written here. If we | |
809 | * do not write the data out, we expose ourselves to the null files | |
810 | * problem. | |
811 | * | |
812 | * Only flush from the on disk size to the smaller of the in memory | |
813 | * file size or the new size as that's the range we really care about | |
814 | * here and prevents waiting for other data not within the range we | |
815 | * care about here. | |
816 | */ | |
673e8e59 | 817 | if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) { |
2451337d | 818 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
4bc1ea6b | 819 | ip->i_d.di_size, newsize); |
c4ed4243 | 820 | if (error) |
76ca4c23 | 821 | return error; |
c4ed4243 CH |
822 | } |
823 | ||
824 | /* | |
4a06fd26 | 825 | * Wait for all direct I/O to complete. |
c4ed4243 | 826 | */ |
4a06fd26 | 827 | inode_dio_wait(inode); |
c4ed4243 | 828 | |
49abc3a8 DC |
829 | /* |
830 | * Do all the page cache truncate work outside the transaction context | |
831 | * as the "lock" order is page lock->log space reservation. i.e. | |
832 | * locking pages inside the transaction can ABBA deadlock with | |
833 | * writeback. We have to do the VFS inode size update before we truncate | |
834 | * the pagecache, however, to avoid racing with page faults beyond the | |
835 | * new EOF they are not serialised against truncate operations except by | |
836 | * page locks and size updates. | |
837 | * | |
838 | * Hence we are in a situation where a truncate can fail with ENOMEM | |
839 | * from xfs_trans_reserve(), but having already truncated the in-memory | |
840 | * version of the file (i.e. made user visible changes). There's not | |
841 | * much we can do about this, except to hope that the caller sees ENOMEM | |
842 | * and retries the truncate operation. | |
843 | */ | |
2451337d | 844 | error = block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks); |
c4ed4243 | 845 | if (error) |
76ca4c23 | 846 | return error; |
49abc3a8 | 847 | truncate_setsize(inode, newsize); |
c4ed4243 | 848 | |
2ebff7bb DC |
849 | /* |
850 | * The "we can't serialise against page faults" pain gets worse. | |
851 | * | |
852 | * If the file is mapped then we have to clean the page at the old EOF | |
853 | * when extending the file. Extending the file can expose changes the | |
854 | * underlying page mapping (e.g. from beyond EOF to a hole or | |
855 | * unwritten), and so on the next attempt to write to that page we need | |
856 | * to remap it for write. i.e. we need .page_mkwrite() to be called. | |
857 | * Hence we need to clean the page to clean the pte and so a new write | |
858 | * fault will be triggered appropriately. | |
859 | * | |
860 | * If we do it before we change the inode size, then we can race with a | |
861 | * page fault that maps the page with exactly the same problem. If we do | |
862 | * it after we change the file size, then a new page fault can come in | |
863 | * and allocate space before we've run the rest of the truncate | |
864 | * transaction. That's kinda grotesque, but it's better than have data | |
865 | * over a hole, and so that's the lesser evil that has been chosen here. | |
866 | * | |
867 | * The real solution, however, is to have some mechanism for locking out | |
868 | * page faults while a truncate is in progress. | |
869 | */ | |
870 | if (newsize > oldsize && mapping_mapped(VFS_I(ip)->i_mapping)) { | |
871 | error = filemap_write_and_wait_range( | |
872 | VFS_I(ip)->i_mapping, | |
873 | round_down(oldsize, PAGE_CACHE_SIZE), | |
874 | round_up(oldsize, PAGE_CACHE_SIZE) - 1); | |
875 | if (error) | |
876 | return error; | |
877 | } | |
878 | ||
c4ed4243 | 879 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); |
3d3c8b52 | 880 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
c4ed4243 CH |
881 | if (error) |
882 | goto out_trans_cancel; | |
883 | ||
c4ed4243 CH |
884 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; |
885 | lock_flags |= XFS_ILOCK_EXCL; | |
c4ed4243 | 886 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
ddc3415a | 887 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
888 | |
889 | /* | |
890 | * Only change the c/mtime if we are changing the size or we are | |
891 | * explicitly asked to change it. This handles the semantic difference | |
892 | * between truncate() and ftruncate() as implemented in the VFS. | |
893 | * | |
894 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
895 | * special case where we need to update the times despite not having | |
896 | * these flags set. For all other operations the VFS set these flags | |
897 | * explicitly if it wants a timestamp update. | |
898 | */ | |
fe60a8a0 CH |
899 | if (newsize != oldsize && |
900 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 CH |
901 | iattr->ia_ctime = iattr->ia_mtime = |
902 | current_fs_time(inode->i_sb); | |
fe60a8a0 | 903 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
904 | } |
905 | ||
673e8e59 CH |
906 | /* |
907 | * The first thing we do is set the size to new_size permanently on | |
908 | * disk. This way we don't have to worry about anyone ever being able | |
909 | * to look at the data being freed even in the face of a crash. | |
910 | * What we're getting around here is the case where we free a block, it | |
911 | * is allocated to another file, it is written to, and then we crash. | |
912 | * If the new data gets written to the file but the log buffers | |
913 | * containing the free and reallocation don't, then we'd end up with | |
914 | * garbage in the blocks being freed. As long as we make the new size | |
915 | * permanent before actually freeing any blocks it doesn't matter if | |
916 | * they get written to. | |
917 | */ | |
918 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
919 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
920 | ||
921 | if (newsize <= oldsize) { | |
922 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 CH |
923 | if (error) |
924 | goto out_trans_abort; | |
925 | ||
926 | /* | |
927 | * Truncated "down", so we're removing references to old data | |
928 | * here - if we delay flushing for a long time, we expose | |
929 | * ourselves unduly to the notorious NULL files problem. So, | |
930 | * we mark this inode and flush it when the file is closed, | |
931 | * and do not wait the usual (long) time for writeout. | |
932 | */ | |
933 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
934 | |
935 | /* A truncate down always removes post-EOF blocks. */ | |
936 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
937 | } |
938 | ||
fe60a8a0 | 939 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 940 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 941 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 942 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
943 | |
944 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
945 | ||
946 | XFS_STATS_INC(xs_ig_attrchg); | |
947 | ||
948 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
949 | xfs_trans_set_sync(tp); | |
950 | ||
951 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
952 | out_unlock: | |
953 | if (lock_flags) | |
954 | xfs_iunlock(ip, lock_flags); | |
955 | return error; | |
956 | ||
957 | out_trans_abort: | |
958 | commit_flags |= XFS_TRANS_ABORT; | |
959 | out_trans_cancel: | |
960 | xfs_trans_cancel(tp, commit_flags); | |
961 | goto out_unlock; | |
962 | } | |
963 | ||
1da177e4 | 964 | STATIC int |
416c6d5b | 965 | xfs_vn_setattr( |
76ca4c23 CH |
966 | struct dentry *dentry, |
967 | struct iattr *iattr) | |
1da177e4 | 968 | { |
76ca4c23 CH |
969 | struct xfs_inode *ip = XFS_I(dentry->d_inode); |
970 | int error; | |
971 | ||
972 | if (iattr->ia_valid & ATTR_SIZE) { | |
973 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
974 | error = xfs_setattr_size(ip, iattr); | |
975 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
976 | } else { | |
977 | error = xfs_setattr_nonsize(ip, iattr, 0); | |
978 | } | |
979 | ||
2451337d | 980 | return error; |
1da177e4 LT |
981 | } |
982 | ||
69ff2826 CH |
983 | STATIC int |
984 | xfs_vn_update_time( | |
985 | struct inode *inode, | |
986 | struct timespec *now, | |
987 | int flags) | |
988 | { | |
989 | struct xfs_inode *ip = XFS_I(inode); | |
990 | struct xfs_mount *mp = ip->i_mount; | |
991 | struct xfs_trans *tp; | |
992 | int error; | |
993 | ||
994 | trace_xfs_update_time(ip); | |
995 | ||
996 | tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS); | |
3d3c8b52 | 997 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0); |
69ff2826 CH |
998 | if (error) { |
999 | xfs_trans_cancel(tp, 0); | |
2451337d | 1000 | return error; |
69ff2826 CH |
1001 | } |
1002 | ||
1003 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1004 | if (flags & S_CTIME) { | |
1005 | inode->i_ctime = *now; | |
1006 | ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec; | |
1007 | ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec; | |
1008 | } | |
1009 | if (flags & S_MTIME) { | |
1010 | inode->i_mtime = *now; | |
1011 | ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec; | |
1012 | ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec; | |
1013 | } | |
1014 | if (flags & S_ATIME) { | |
1015 | inode->i_atime = *now; | |
1016 | ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec; | |
1017 | ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec; | |
1018 | } | |
1019 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1020 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); | |
2451337d | 1021 | return xfs_trans_commit(tp, 0); |
69ff2826 CH |
1022 | } |
1023 | ||
f35642e2 ES |
1024 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
1025 | ||
1026 | /* | |
1027 | * Call fiemap helper to fill in user data. | |
1028 | * Returns positive errors to xfs_getbmap. | |
1029 | */ | |
1030 | STATIC int | |
1031 | xfs_fiemap_format( | |
1032 | void **arg, | |
1033 | struct getbmapx *bmv, | |
1034 | int *full) | |
1035 | { | |
1036 | int error; | |
1037 | struct fiemap_extent_info *fieinfo = *arg; | |
1038 | u32 fiemap_flags = 0; | |
1039 | u64 logical, physical, length; | |
1040 | ||
1041 | /* Do nothing for a hole */ | |
1042 | if (bmv->bmv_block == -1LL) | |
1043 | return 0; | |
1044 | ||
1045 | logical = BBTOB(bmv->bmv_offset); | |
1046 | physical = BBTOB(bmv->bmv_block); | |
1047 | length = BBTOB(bmv->bmv_length); | |
1048 | ||
1049 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) | |
1050 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; | |
1051 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { | |
635c4d0b JL |
1052 | fiemap_flags |= (FIEMAP_EXTENT_DELALLOC | |
1053 | FIEMAP_EXTENT_UNKNOWN); | |
f35642e2 ES |
1054 | physical = 0; /* no block yet */ |
1055 | } | |
1056 | if (bmv->bmv_oflags & BMV_OF_LAST) | |
1057 | fiemap_flags |= FIEMAP_EXTENT_LAST; | |
1058 | ||
1059 | error = fiemap_fill_next_extent(fieinfo, logical, physical, | |
1060 | length, fiemap_flags); | |
1061 | if (error > 0) { | |
1062 | error = 0; | |
1063 | *full = 1; /* user array now full */ | |
1064 | } | |
1065 | ||
2451337d | 1066 | return error; |
f35642e2 ES |
1067 | } |
1068 | ||
1069 | STATIC int | |
1070 | xfs_vn_fiemap( | |
1071 | struct inode *inode, | |
1072 | struct fiemap_extent_info *fieinfo, | |
1073 | u64 start, | |
1074 | u64 length) | |
1075 | { | |
1076 | xfs_inode_t *ip = XFS_I(inode); | |
1077 | struct getbmapx bm; | |
1078 | int error; | |
1079 | ||
1080 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); | |
1081 | if (error) | |
1082 | return error; | |
1083 | ||
1084 | /* Set up bmap header for xfs internal routine */ | |
eedf32bf | 1085 | bm.bmv_offset = BTOBBT(start); |
f35642e2 ES |
1086 | /* Special case for whole file */ |
1087 | if (length == FIEMAP_MAX_OFFSET) | |
1088 | bm.bmv_length = -1LL; | |
1089 | else | |
eedf32bf | 1090 | bm.bmv_length = BTOBB(start + length) - bm.bmv_offset; |
f35642e2 | 1091 | |
97db39a1 | 1092 | /* We add one because in getbmap world count includes the header */ |
2d1ff3c7 TM |
1093 | bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : |
1094 | fieinfo->fi_extents_max + 1; | |
1095 | bm.bmv_count = min_t(__s32, bm.bmv_count, | |
1096 | (PAGE_SIZE * 16 / sizeof(struct getbmapx))); | |
9af25465 | 1097 | bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; |
f35642e2 ES |
1098 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) |
1099 | bm.bmv_iflags |= BMV_IF_ATTRFORK; | |
1100 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) | |
1101 | bm.bmv_iflags |= BMV_IF_DELALLOC; | |
1102 | ||
1103 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); | |
1104 | if (error) | |
2451337d | 1105 | return error; |
f35642e2 ES |
1106 | |
1107 | return 0; | |
1108 | } | |
1109 | ||
99b6436b ZYW |
1110 | STATIC int |
1111 | xfs_vn_tmpfile( | |
1112 | struct inode *dir, | |
1113 | struct dentry *dentry, | |
1114 | umode_t mode) | |
1115 | { | |
d540e43b | 1116 | return xfs_generic_create(dir, dentry, mode, 0, true); |
99b6436b ZYW |
1117 | } |
1118 | ||
41be8bed | 1119 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1120 | .get_acl = xfs_get_acl, |
2401dc29 | 1121 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1122 | .getattr = xfs_vn_getattr, |
1123 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1124 | .setxattr = generic_setxattr, |
1125 | .getxattr = generic_getxattr, | |
1126 | .removexattr = generic_removexattr, | |
416c6d5b | 1127 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1128 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1129 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1130 | }; |
1131 | ||
41be8bed | 1132 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1133 | .create = xfs_vn_create, |
1134 | .lookup = xfs_vn_lookup, | |
1135 | .link = xfs_vn_link, | |
1136 | .unlink = xfs_vn_unlink, | |
1137 | .symlink = xfs_vn_symlink, | |
1138 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1139 | /* |
1140 | * Yes, XFS uses the same method for rmdir and unlink. | |
1141 | * | |
1142 | * There are some subtile differences deeper in the code, | |
1143 | * but we use S_ISDIR to check for those. | |
1144 | */ | |
1145 | .rmdir = xfs_vn_unlink, | |
416c6d5b NS |
1146 | .mknod = xfs_vn_mknod, |
1147 | .rename = xfs_vn_rename, | |
4e34e719 | 1148 | .get_acl = xfs_get_acl, |
2401dc29 | 1149 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1150 | .getattr = xfs_vn_getattr, |
1151 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1152 | .setxattr = generic_setxattr, |
1153 | .getxattr = generic_getxattr, | |
1154 | .removexattr = generic_removexattr, | |
416c6d5b | 1155 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1156 | .update_time = xfs_vn_update_time, |
99b6436b | 1157 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1158 | }; |
1159 | ||
41be8bed | 1160 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1161 | .create = xfs_vn_create, |
1162 | .lookup = xfs_vn_ci_lookup, | |
1163 | .link = xfs_vn_link, | |
1164 | .unlink = xfs_vn_unlink, | |
1165 | .symlink = xfs_vn_symlink, | |
1166 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1167 | /* |
1168 | * Yes, XFS uses the same method for rmdir and unlink. | |
1169 | * | |
1170 | * There are some subtile differences deeper in the code, | |
1171 | * but we use S_ISDIR to check for those. | |
1172 | */ | |
1173 | .rmdir = xfs_vn_unlink, | |
384f3ced BN |
1174 | .mknod = xfs_vn_mknod, |
1175 | .rename = xfs_vn_rename, | |
4e34e719 | 1176 | .get_acl = xfs_get_acl, |
2401dc29 | 1177 | .set_acl = xfs_set_acl, |
384f3ced BN |
1178 | .getattr = xfs_vn_getattr, |
1179 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1180 | .setxattr = generic_setxattr, |
1181 | .getxattr = generic_getxattr, | |
1182 | .removexattr = generic_removexattr, | |
384f3ced | 1183 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1184 | .update_time = xfs_vn_update_time, |
99b6436b | 1185 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1186 | }; |
1187 | ||
41be8bed | 1188 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 1189 | .readlink = generic_readlink, |
416c6d5b | 1190 | .follow_link = xfs_vn_follow_link, |
96c8c442 | 1191 | .put_link = kfree_put_link, |
416c6d5b NS |
1192 | .getattr = xfs_vn_getattr, |
1193 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1194 | .setxattr = generic_setxattr, |
1195 | .getxattr = generic_getxattr, | |
1196 | .removexattr = generic_removexattr, | |
416c6d5b | 1197 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1198 | .update_time = xfs_vn_update_time, |
1da177e4 | 1199 | }; |
41be8bed CH |
1200 | |
1201 | STATIC void | |
1202 | xfs_diflags_to_iflags( | |
1203 | struct inode *inode, | |
1204 | struct xfs_inode *ip) | |
1205 | { | |
1206 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
1207 | inode->i_flags |= S_IMMUTABLE; | |
1208 | else | |
1209 | inode->i_flags &= ~S_IMMUTABLE; | |
1210 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
1211 | inode->i_flags |= S_APPEND; | |
1212 | else | |
1213 | inode->i_flags &= ~S_APPEND; | |
1214 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
1215 | inode->i_flags |= S_SYNC; | |
1216 | else | |
1217 | inode->i_flags &= ~S_SYNC; | |
1218 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
1219 | inode->i_flags |= S_NOATIME; | |
1220 | else | |
1221 | inode->i_flags &= ~S_NOATIME; | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Initialize the Linux inode, set up the operation vectors and | |
1226 | * unlock the inode. | |
1227 | * | |
1228 | * When reading existing inodes from disk this is called directly | |
1229 | * from xfs_iget, when creating a new inode it is called from | |
1230 | * xfs_ialloc after setting up the inode. | |
bf904248 DC |
1231 | * |
1232 | * We are always called with an uninitialised linux inode here. | |
1233 | * We need to initialise the necessary fields and take a reference | |
1234 | * on it. | |
41be8bed CH |
1235 | */ |
1236 | void | |
1237 | xfs_setup_inode( | |
1238 | struct xfs_inode *ip) | |
1239 | { | |
bf904248 | 1240 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1241 | gfp_t gfp_mask; |
bf904248 DC |
1242 | |
1243 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1244 | inode->i_state = I_NEW; |
646ec461 CH |
1245 | |
1246 | inode_sb_list_add(inode); | |
c6f6cd06 CH |
1247 | /* make the inode look hashed for the writeback code */ |
1248 | hlist_add_fake(&inode->i_hash); | |
41be8bed CH |
1249 | |
1250 | inode->i_mode = ip->i_d.di_mode; | |
bfe86848 | 1251 | set_nlink(inode, ip->i_d.di_nlink); |
7aab1b28 DE |
1252 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1253 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed CH |
1254 | |
1255 | switch (inode->i_mode & S_IFMT) { | |
1256 | case S_IFBLK: | |
1257 | case S_IFCHR: | |
1258 | inode->i_rdev = | |
1259 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
1260 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
1261 | break; | |
1262 | default: | |
1263 | inode->i_rdev = 0; | |
1264 | break; | |
1265 | } | |
1266 | ||
1267 | inode->i_generation = ip->i_d.di_gen; | |
1268 | i_size_write(inode, ip->i_d.di_size); | |
1269 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
1270 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
1271 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
1272 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
1273 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
1274 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
1275 | xfs_diflags_to_iflags(inode, ip); | |
41be8bed | 1276 | |
4bceb18f | 1277 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; |
93a8614e | 1278 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); |
41be8bed CH |
1279 | switch (inode->i_mode & S_IFMT) { |
1280 | case S_IFREG: | |
1281 | inode->i_op = &xfs_inode_operations; | |
1282 | inode->i_fop = &xfs_file_operations; | |
1283 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1284 | break; | |
1285 | case S_IFDIR: | |
93a8614e | 1286 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
41be8bed CH |
1287 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) |
1288 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1289 | else | |
1290 | inode->i_op = &xfs_dir_inode_operations; | |
1291 | inode->i_fop = &xfs_dir_file_operations; | |
32c5483a | 1292 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
41be8bed CH |
1293 | break; |
1294 | case S_IFLNK: | |
1295 | inode->i_op = &xfs_symlink_inode_operations; | |
1296 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) | |
1297 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1298 | break; | |
1299 | default: | |
1300 | inode->i_op = &xfs_inode_operations; | |
1301 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1302 | break; | |
1303 | } | |
1304 | ||
ad22c7a0 DC |
1305 | /* |
1306 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1307 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1308 | * stacks or deadlocking. | |
1309 | */ | |
1310 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1311 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1312 | ||
510792ee CH |
1313 | /* |
1314 | * If there is no attribute fork no ACL can exist on this inode, | |
1315 | * and it can't have any file capabilities attached to it either. | |
1316 | */ | |
1317 | if (!XFS_IFORK_Q(ip)) { | |
1318 | inode_has_no_xattr(inode); | |
6311b108 | 1319 | cache_no_acl(inode); |
510792ee | 1320 | } |
6311b108 | 1321 | |
41be8bed CH |
1322 | xfs_iflags_clear(ip, XFS_INEW); |
1323 | barrier(); | |
1324 | ||
1325 | unlock_new_inode(inode); | |
1326 | } |