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Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 LT |
18 | #include "xfs.h" |
19 | #include "xfs_fs.h" | |
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++) { | |
a5a14de2 DC |
75 | error = -xfs_attr_set(ip, xattr->name, xattr->value, |
76 | xattr->value_len, ATTR_SECURE); | |
9d8f13ba MZ |
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 | { |
a5a14de2 DC |
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)); |
3a69c7dc YL |
127 | } |
128 | ||
1da177e4 | 129 | STATIC int |
d540e43b | 130 | xfs_generic_create( |
1da177e4 LT |
131 | struct inode *dir, |
132 | struct dentry *dentry, | |
1a67aafb | 133 | umode_t mode, |
d540e43b BF |
134 | dev_t rdev, |
135 | bool tmpfile) /* unnamed file */ | |
1da177e4 | 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 | |
d540e43b BF |
159 | if (!tmpfile) { |
160 | xfs_dentry_to_name(&name, dentry, mode); | |
161 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); | |
162 | } else { | |
163 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); | |
164 | } | |
db0bb7ba CH |
165 | if (unlikely(error)) |
166 | goto out_free_acl; | |
446ada4a | 167 | |
01651646 | 168 | inode = VFS_I(ip); |
979ebab1 | 169 | |
2a7dba39 | 170 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
171 | if (unlikely(error)) |
172 | goto out_cleanup_inode; | |
173 | ||
2401dc29 | 174 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 175 | if (default_acl) { |
6670232b | 176 | error = -xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
2401dc29 | 177 | if (error) |
db0bb7ba | 178 | goto out_cleanup_inode; |
1da177e4 | 179 | } |
2401dc29 | 180 | if (acl) { |
6670232b | 181 | error = -xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
2401dc29 CH |
182 | if (error) |
183 | goto out_cleanup_inode; | |
184 | } | |
185 | #endif | |
1da177e4 | 186 | |
d540e43b BF |
187 | if (tmpfile) |
188 | d_tmpfile(dentry, inode); | |
189 | else | |
190 | d_instantiate(dentry, inode); | |
191 | ||
2401dc29 CH |
192 | out_free_acl: |
193 | if (default_acl) | |
194 | posix_acl_release(default_acl); | |
195 | if (acl) | |
196 | posix_acl_release(acl); | |
db0bb7ba CH |
197 | return -error; |
198 | ||
199 | out_cleanup_inode: | |
d540e43b BF |
200 | if (!tmpfile) |
201 | xfs_cleanup_inode(dir, inode, dentry); | |
202 | iput(inode); | |
2401dc29 | 203 | goto out_free_acl; |
1da177e4 LT |
204 | } |
205 | ||
d540e43b BF |
206 | STATIC int |
207 | xfs_vn_mknod( | |
208 | struct inode *dir, | |
209 | struct dentry *dentry, | |
210 | umode_t mode, | |
211 | dev_t rdev) | |
212 | { | |
213 | return xfs_generic_create(dir, dentry, mode, rdev, false); | |
214 | } | |
215 | ||
1da177e4 | 216 | STATIC int |
416c6d5b | 217 | xfs_vn_create( |
1da177e4 LT |
218 | struct inode *dir, |
219 | struct dentry *dentry, | |
4acdaf27 | 220 | umode_t mode, |
ebfc3b49 | 221 | bool flags) |
1da177e4 | 222 | { |
416c6d5b | 223 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
224 | } |
225 | ||
226 | STATIC int | |
416c6d5b | 227 | xfs_vn_mkdir( |
1da177e4 LT |
228 | struct inode *dir, |
229 | struct dentry *dentry, | |
18bb1db3 | 230 | umode_t mode) |
1da177e4 | 231 | { |
416c6d5b | 232 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
233 | } |
234 | ||
235 | STATIC struct dentry * | |
416c6d5b | 236 | xfs_vn_lookup( |
1da177e4 LT |
237 | struct inode *dir, |
238 | struct dentry *dentry, | |
00cd8dd3 | 239 | unsigned int flags) |
1da177e4 | 240 | { |
ef1f5e7a | 241 | struct xfs_inode *cip; |
556b8b16 | 242 | struct xfs_name name; |
1da177e4 LT |
243 | int error; |
244 | ||
245 | if (dentry->d_name.len >= MAXNAMELEN) | |
246 | return ERR_PTR(-ENAMETOOLONG); | |
247 | ||
0cb97766 | 248 | xfs_dentry_to_name(&name, dentry, 0); |
384f3ced | 249 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 250 | if (unlikely(error)) { |
1da177e4 LT |
251 | if (unlikely(error != ENOENT)) |
252 | return ERR_PTR(-error); | |
253 | d_add(dentry, NULL); | |
254 | return NULL; | |
255 | } | |
256 | ||
01651646 | 257 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
258 | } |
259 | ||
384f3ced BN |
260 | STATIC struct dentry * |
261 | xfs_vn_ci_lookup( | |
262 | struct inode *dir, | |
263 | struct dentry *dentry, | |
00cd8dd3 | 264 | unsigned int flags) |
384f3ced BN |
265 | { |
266 | struct xfs_inode *ip; | |
267 | struct xfs_name xname; | |
268 | struct xfs_name ci_name; | |
269 | struct qstr dname; | |
270 | int error; | |
271 | ||
272 | if (dentry->d_name.len >= MAXNAMELEN) | |
273 | return ERR_PTR(-ENAMETOOLONG); | |
274 | ||
0cb97766 | 275 | xfs_dentry_to_name(&xname, dentry, 0); |
384f3ced BN |
276 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
277 | if (unlikely(error)) { | |
278 | if (unlikely(error != ENOENT)) | |
279 | return ERR_PTR(-error); | |
866d5dc9 BN |
280 | /* |
281 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
282 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
283 | * with CI filesystems). | |
284 | */ | |
384f3ced BN |
285 | return NULL; |
286 | } | |
287 | ||
288 | /* if exact match, just splice and exit */ | |
289 | if (!ci_name.name) | |
01651646 | 290 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
291 | |
292 | /* else case-insensitive match... */ | |
293 | dname.name = ci_name.name; | |
294 | dname.len = ci_name.len; | |
e45b590b | 295 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
296 | kmem_free(ci_name.name); |
297 | return dentry; | |
298 | } | |
299 | ||
1da177e4 | 300 | STATIC int |
416c6d5b | 301 | xfs_vn_link( |
1da177e4 LT |
302 | struct dentry *old_dentry, |
303 | struct inode *dir, | |
304 | struct dentry *dentry) | |
305 | { | |
d9424b3c | 306 | struct inode *inode = old_dentry->d_inode; |
556b8b16 | 307 | struct xfs_name name; |
1da177e4 LT |
308 | int error; |
309 | ||
0cb97766 | 310 | xfs_dentry_to_name(&name, dentry, inode->i_mode); |
1da177e4 | 311 | |
556b8b16 | 312 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 313 | if (unlikely(error)) |
a3da7896 | 314 | return -error; |
a3da7896 | 315 | |
7de9c6ee | 316 | ihold(inode); |
a3da7896 CH |
317 | d_instantiate(dentry, inode); |
318 | return 0; | |
1da177e4 LT |
319 | } |
320 | ||
321 | STATIC int | |
416c6d5b | 322 | xfs_vn_unlink( |
1da177e4 LT |
323 | struct inode *dir, |
324 | struct dentry *dentry) | |
325 | { | |
556b8b16 | 326 | struct xfs_name name; |
1da177e4 LT |
327 | int error; |
328 | ||
0cb97766 | 329 | xfs_dentry_to_name(&name, dentry, 0); |
1da177e4 | 330 | |
e5700704 CH |
331 | error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode)); |
332 | if (error) | |
333 | return error; | |
334 | ||
335 | /* | |
336 | * With unlink, the VFS makes the dentry "negative": no inode, | |
337 | * but still hashed. This is incompatible with case-insensitive | |
338 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
339 | */ | |
340 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
341 | d_invalidate(dentry); | |
342 | return 0; | |
1da177e4 LT |
343 | } |
344 | ||
345 | STATIC int | |
416c6d5b | 346 | xfs_vn_symlink( |
1da177e4 LT |
347 | struct inode *dir, |
348 | struct dentry *dentry, | |
349 | const char *symname) | |
350 | { | |
3937be5b CH |
351 | struct inode *inode; |
352 | struct xfs_inode *cip = NULL; | |
556b8b16 | 353 | struct xfs_name name; |
1da177e4 | 354 | int error; |
576b1d67 | 355 | umode_t mode; |
1da177e4 | 356 | |
3e5daf05 | 357 | mode = S_IFLNK | |
ce3b0f8d | 358 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
0cb97766 | 359 | xfs_dentry_to_name(&name, dentry, mode); |
1da177e4 | 360 | |
6c77b0ea | 361 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
362 | if (unlikely(error)) |
363 | goto out; | |
364 | ||
01651646 | 365 | inode = VFS_I(cip); |
3937be5b | 366 | |
2a7dba39 | 367 | error = xfs_init_security(inode, dir, &dentry->d_name); |
3937be5b CH |
368 | if (unlikely(error)) |
369 | goto out_cleanup_inode; | |
370 | ||
371 | d_instantiate(dentry, inode); | |
3937be5b CH |
372 | return 0; |
373 | ||
374 | out_cleanup_inode: | |
8f112e3b | 375 | xfs_cleanup_inode(dir, inode, dentry); |
d540e43b | 376 | iput(inode); |
3937be5b | 377 | out: |
1da177e4 LT |
378 | return -error; |
379 | } | |
380 | ||
1da177e4 | 381 | STATIC int |
416c6d5b | 382 | xfs_vn_rename( |
1da177e4 LT |
383 | struct inode *odir, |
384 | struct dentry *odentry, | |
385 | struct inode *ndir, | |
386 | struct dentry *ndentry) | |
387 | { | |
388 | struct inode *new_inode = ndentry->d_inode; | |
556b8b16 BN |
389 | struct xfs_name oname; |
390 | struct xfs_name nname; | |
1da177e4 | 391 | |
0cb97766 DC |
392 | xfs_dentry_to_name(&oname, odentry, 0); |
393 | xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode); | |
556b8b16 | 394 | |
e5700704 | 395 | return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
cfa853e4 | 396 | XFS_I(ndir), &nname, new_inode ? |
0cb97766 | 397 | XFS_I(new_inode) : NULL); |
1da177e4 LT |
398 | } |
399 | ||
400 | /* | |
401 | * careful here - this function can get called recursively, so | |
402 | * we need to be very careful about how much stack we use. | |
403 | * uio is kmalloced for this reason... | |
404 | */ | |
008b150a | 405 | STATIC void * |
416c6d5b | 406 | xfs_vn_follow_link( |
1da177e4 LT |
407 | struct dentry *dentry, |
408 | struct nameidata *nd) | |
409 | { | |
1da177e4 | 410 | char *link; |
804c83c3 | 411 | int error = -ENOMEM; |
1da177e4 | 412 | |
f52720ca | 413 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
414 | if (!link) |
415 | goto out_err; | |
1da177e4 | 416 | |
739bfb2a | 417 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
804c83c3 CH |
418 | if (unlikely(error)) |
419 | goto out_kfree; | |
1da177e4 LT |
420 | |
421 | nd_set_link(nd, link); | |
008b150a | 422 | return NULL; |
804c83c3 CH |
423 | |
424 | out_kfree: | |
425 | kfree(link); | |
426 | out_err: | |
427 | nd_set_link(nd, ERR_PTR(error)); | |
428 | return NULL; | |
1da177e4 LT |
429 | } |
430 | ||
1da177e4 | 431 | STATIC int |
416c6d5b | 432 | xfs_vn_getattr( |
c43f4087 CH |
433 | struct vfsmount *mnt, |
434 | struct dentry *dentry, | |
435 | struct kstat *stat) | |
1da177e4 | 436 | { |
c43f4087 CH |
437 | struct inode *inode = dentry->d_inode; |
438 | struct xfs_inode *ip = XFS_I(inode); | |
439 | struct xfs_mount *mp = ip->i_mount; | |
440 | ||
cca28fb8 | 441 | trace_xfs_getattr(ip); |
c43f4087 CH |
442 | |
443 | if (XFS_FORCED_SHUTDOWN(mp)) | |
ed32201e | 444 | return -XFS_ERROR(EIO); |
c43f4087 CH |
445 | |
446 | stat->size = XFS_ISIZE(ip); | |
447 | stat->dev = inode->i_sb->s_dev; | |
448 | stat->mode = ip->i_d.di_mode; | |
449 | stat->nlink = ip->i_d.di_nlink; | |
7aab1b28 DE |
450 | stat->uid = inode->i_uid; |
451 | stat->gid = inode->i_gid; | |
c43f4087 | 452 | stat->ino = ip->i_ino; |
c43f4087 | 453 | stat->atime = inode->i_atime; |
f9581b14 CH |
454 | stat->mtime = inode->i_mtime; |
455 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
456 | stat->blocks = |
457 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
458 | ||
459 | ||
460 | switch (inode->i_mode & S_IFMT) { | |
461 | case S_IFBLK: | |
462 | case S_IFCHR: | |
463 | stat->blksize = BLKDEV_IOSIZE; | |
464 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
465 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
466 | break; | |
467 | default: | |
71ddabb9 | 468 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
469 | /* |
470 | * If the file blocks are being allocated from a | |
471 | * realtime volume, then return the inode's realtime | |
472 | * extent size or the realtime volume's extent size. | |
473 | */ | |
474 | stat->blksize = | |
475 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
476 | } else | |
477 | stat->blksize = xfs_preferred_iosize(mp); | |
478 | stat->rdev = 0; | |
479 | break; | |
69e23b9a | 480 | } |
c43f4087 CH |
481 | |
482 | return 0; | |
1da177e4 LT |
483 | } |
484 | ||
56c19e89 DC |
485 | static void |
486 | xfs_setattr_mode( | |
56c19e89 DC |
487 | struct xfs_inode *ip, |
488 | struct iattr *iattr) | |
489 | { | |
0c3d88df CH |
490 | struct inode *inode = VFS_I(ip); |
491 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 492 | |
56c19e89 DC |
493 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
494 | ||
56c19e89 DC |
495 | ip->i_d.di_mode &= S_IFMT; |
496 | ip->i_d.di_mode |= mode & ~S_IFMT; | |
497 | ||
498 | inode->i_mode &= S_IFMT; | |
499 | inode->i_mode |= mode & ~S_IFMT; | |
500 | } | |
501 | ||
c91c46c1 CH |
502 | static void |
503 | xfs_setattr_time( | |
504 | struct xfs_inode *ip, | |
505 | struct iattr *iattr) | |
506 | { | |
507 | struct inode *inode = VFS_I(ip); | |
508 | ||
509 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
510 | ||
511 | if (iattr->ia_valid & ATTR_ATIME) { | |
512 | inode->i_atime = iattr->ia_atime; | |
513 | ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; | |
514 | ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; | |
515 | } | |
516 | if (iattr->ia_valid & ATTR_CTIME) { | |
517 | inode->i_ctime = iattr->ia_ctime; | |
518 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; | |
519 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; | |
520 | } | |
521 | if (iattr->ia_valid & ATTR_MTIME) { | |
522 | inode->i_mtime = iattr->ia_mtime; | |
523 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; | |
524 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; | |
525 | } | |
526 | } | |
527 | ||
c4ed4243 CH |
528 | int |
529 | xfs_setattr_nonsize( | |
530 | struct xfs_inode *ip, | |
531 | struct iattr *iattr, | |
532 | int flags) | |
533 | { | |
534 | xfs_mount_t *mp = ip->i_mount; | |
535 | struct inode *inode = VFS_I(ip); | |
536 | int mask = iattr->ia_valid; | |
537 | xfs_trans_t *tp; | |
538 | int error; | |
7aab1b28 DE |
539 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
540 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
541 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
542 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
543 | ||
544 | trace_xfs_setattr(ip); | |
545 | ||
42c49d7f CM |
546 | /* If acls are being inherited, we already have this checked */ |
547 | if (!(flags & XFS_ATTR_NOACL)) { | |
548 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
549 | return XFS_ERROR(EROFS); | |
c4ed4243 | 550 | |
42c49d7f CM |
551 | if (XFS_FORCED_SHUTDOWN(mp)) |
552 | return XFS_ERROR(EIO); | |
c4ed4243 | 553 | |
42c49d7f CM |
554 | error = -inode_change_ok(inode, iattr); |
555 | if (error) | |
556 | return XFS_ERROR(error); | |
557 | } | |
c4ed4243 CH |
558 | |
559 | ASSERT((mask & ATTR_SIZE) == 0); | |
560 | ||
561 | /* | |
562 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
563 | * before we start any other transactions. Trying to do this later | |
564 | * is messy. We don't care to take a readlock to look at the ids | |
565 | * in inode here, because we can't hold it across the trans_reserve. | |
566 | * If the IDs do change before we take the ilock, we're covered | |
567 | * because the i_*dquot fields will get updated anyway. | |
568 | */ | |
569 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
570 | uint qflags = 0; | |
571 | ||
572 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
573 | uid = iattr->ia_uid; | |
574 | qflags |= XFS_QMOPT_UQUOTA; | |
575 | } else { | |
7aab1b28 | 576 | uid = inode->i_uid; |
c4ed4243 CH |
577 | } |
578 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
579 | gid = iattr->ia_gid; | |
580 | qflags |= XFS_QMOPT_GQUOTA; | |
581 | } else { | |
7aab1b28 | 582 | gid = inode->i_gid; |
c4ed4243 CH |
583 | } |
584 | ||
585 | /* | |
586 | * We take a reference when we initialize udqp and gdqp, | |
587 | * so it is important that we never blindly double trip on | |
588 | * the same variable. See xfs_create() for an example. | |
589 | */ | |
590 | ASSERT(udqp == NULL); | |
591 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
592 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
593 | xfs_kgid_to_gid(gid), | |
594 | xfs_get_projid(ip), | |
595 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
596 | if (error) |
597 | return error; | |
598 | } | |
599 | ||
600 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); | |
3d3c8b52 | 601 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); |
c4ed4243 CH |
602 | if (error) |
603 | goto out_dqrele; | |
604 | ||
605 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
606 | ||
607 | /* | |
608 | * Change file ownership. Must be the owner or privileged. | |
609 | */ | |
610 | if (mask & (ATTR_UID|ATTR_GID)) { | |
611 | /* | |
612 | * These IDs could have changed since we last looked at them. | |
613 | * But, we're assured that if the ownership did change | |
614 | * while we didn't have the inode locked, inode's dquot(s) | |
615 | * would have changed also. | |
616 | */ | |
7aab1b28 DE |
617 | iuid = inode->i_uid; |
618 | igid = inode->i_gid; | |
c4ed4243 CH |
619 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
620 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
621 | ||
622 | /* | |
623 | * Do a quota reservation only if uid/gid is actually | |
624 | * going to change. | |
625 | */ | |
626 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
627 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
628 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
629 | ASSERT(tp); |
630 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 631 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
632 | XFS_QMOPT_FORCE_RES : 0); |
633 | if (error) /* out of quota */ | |
634 | goto out_trans_cancel; | |
635 | } | |
636 | } | |
637 | ||
ddc3415a | 638 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
639 | |
640 | /* | |
641 | * Change file ownership. Must be the owner or privileged. | |
642 | */ | |
643 | if (mask & (ATTR_UID|ATTR_GID)) { | |
644 | /* | |
645 | * CAP_FSETID overrides the following restrictions: | |
646 | * | |
647 | * The set-user-ID and set-group-ID bits of a file will be | |
648 | * cleared upon successful return from chown() | |
649 | */ | |
650 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
651 | !capable(CAP_FSETID)) | |
652 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
653 | ||
654 | /* | |
655 | * Change the ownerships and register quota modifications | |
656 | * in the transaction. | |
657 | */ | |
7aab1b28 | 658 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
659 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
660 | ASSERT(mask & ATTR_UID); | |
661 | ASSERT(udqp); | |
662 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
663 | &ip->i_udquot, udqp); | |
664 | } | |
7aab1b28 | 665 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
666 | inode->i_uid = uid; |
667 | } | |
7aab1b28 | 668 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 669 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
670 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
671 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
672 | ASSERT(mask & ATTR_GID); |
673 | ASSERT(gdqp); | |
674 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
675 | &ip->i_gdquot, gdqp); | |
676 | } | |
7aab1b28 | 677 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
678 | inode->i_gid = gid; |
679 | } | |
680 | } | |
681 | ||
56c19e89 | 682 | if (mask & ATTR_MODE) |
0c3d88df | 683 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
684 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
685 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
686 | |
687 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
688 | ||
689 | XFS_STATS_INC(xs_ig_attrchg); | |
690 | ||
691 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
692 | xfs_trans_set_sync(tp); | |
693 | error = xfs_trans_commit(tp, 0); | |
694 | ||
695 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
696 | ||
697 | /* | |
698 | * Release any dquot(s) the inode had kept before chown. | |
699 | */ | |
700 | xfs_qm_dqrele(olddquot1); | |
701 | xfs_qm_dqrele(olddquot2); | |
702 | xfs_qm_dqrele(udqp); | |
703 | xfs_qm_dqrele(gdqp); | |
704 | ||
705 | if (error) | |
706 | return XFS_ERROR(error); | |
707 | ||
708 | /* | |
709 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
710 | * update. We could avoid this with linked transactions | |
711 | * and passing down the transaction pointer all the way | |
712 | * to attr_set. No previous user of the generic | |
713 | * Posix ACL code seems to care about this issue either. | |
714 | */ | |
715 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2401dc29 | 716 | error = -posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 CH |
717 | if (error) |
718 | return XFS_ERROR(error); | |
719 | } | |
720 | ||
721 | return 0; | |
722 | ||
723 | out_trans_cancel: | |
724 | xfs_trans_cancel(tp, 0); | |
725 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
726 | out_dqrele: | |
727 | xfs_qm_dqrele(udqp); | |
728 | xfs_qm_dqrele(gdqp); | |
729 | return error; | |
730 | } | |
731 | ||
732 | /* | |
733 | * Truncate file. Must have write permission and not be a directory. | |
734 | */ | |
735 | int | |
736 | xfs_setattr_size( | |
737 | struct xfs_inode *ip, | |
76ca4c23 | 738 | struct iattr *iattr) |
c4ed4243 CH |
739 | { |
740 | struct xfs_mount *mp = ip->i_mount; | |
741 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 742 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
743 | struct xfs_trans *tp; |
744 | int error; | |
f38996f5 | 745 | uint lock_flags = 0; |
c4ed4243 CH |
746 | uint commit_flags = 0; |
747 | ||
748 | trace_xfs_setattr(ip); | |
749 | ||
750 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
751 | return XFS_ERROR(EROFS); | |
752 | ||
753 | if (XFS_FORCED_SHUTDOWN(mp)) | |
754 | return XFS_ERROR(EIO); | |
755 | ||
756 | error = -inode_change_ok(inode, iattr); | |
757 | if (error) | |
758 | return XFS_ERROR(error); | |
759 | ||
76ca4c23 | 760 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
c4ed4243 | 761 | ASSERT(S_ISREG(ip->i_d.di_mode)); |
fe60a8a0 CH |
762 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
763 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 764 | |
ce7ae151 | 765 | oldsize = inode->i_size; |
673e8e59 CH |
766 | newsize = iattr->ia_size; |
767 | ||
c4ed4243 CH |
768 | /* |
769 | * Short circuit the truncate case for zero length files. | |
770 | */ | |
673e8e59 | 771 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 772 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 773 | return 0; |
681b1200 CH |
774 | |
775 | /* | |
776 | * Use the regular setattr path to update the timestamps. | |
777 | */ | |
681b1200 CH |
778 | iattr->ia_valid &= ~ATTR_SIZE; |
779 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
780 | } |
781 | ||
782 | /* | |
783 | * Make sure that the dquots are attached to the inode. | |
784 | */ | |
f38996f5 | 785 | error = xfs_qm_dqattach(ip, 0); |
c4ed4243 | 786 | if (error) |
76ca4c23 | 787 | return error; |
c4ed4243 CH |
788 | |
789 | /* | |
790 | * Now we can make the changes. Before we join the inode to the | |
791 | * transaction, take care of the part of the truncation that must be | |
792 | * done without the inode lock. This needs to be done before joining | |
793 | * the inode to the transaction, because the inode cannot be unlocked | |
794 | * once it is a part of the transaction. | |
795 | */ | |
673e8e59 | 796 | if (newsize > oldsize) { |
c4ed4243 CH |
797 | /* |
798 | * Do the first part of growing a file: zero any data in the | |
799 | * last block that is beyond the old EOF. We need to do this | |
800 | * before the inode is joined to the transaction to modify | |
801 | * i_size. | |
802 | */ | |
673e8e59 | 803 | error = xfs_zero_eof(ip, newsize, oldsize); |
c4ed4243 | 804 | if (error) |
76ca4c23 | 805 | return error; |
c4ed4243 | 806 | } |
c4ed4243 CH |
807 | |
808 | /* | |
809 | * We are going to log the inode size change in this transaction so | |
810 | * any previous writes that are beyond the on disk EOF and the new | |
811 | * EOF that have not been written out need to be written here. If we | |
812 | * do not write the data out, we expose ourselves to the null files | |
813 | * problem. | |
814 | * | |
815 | * Only flush from the on disk size to the smaller of the in memory | |
816 | * file size or the new size as that's the range we really care about | |
817 | * here and prevents waiting for other data not within the range we | |
818 | * care about here. | |
819 | */ | |
673e8e59 | 820 | if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) { |
4bc1ea6b DC |
821 | error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
822 | ip->i_d.di_size, newsize); | |
c4ed4243 | 823 | if (error) |
76ca4c23 | 824 | return error; |
c4ed4243 CH |
825 | } |
826 | ||
827 | /* | |
4a06fd26 | 828 | * Wait for all direct I/O to complete. |
c4ed4243 | 829 | */ |
4a06fd26 | 830 | inode_dio_wait(inode); |
c4ed4243 | 831 | |
49abc3a8 DC |
832 | /* |
833 | * Do all the page cache truncate work outside the transaction context | |
834 | * as the "lock" order is page lock->log space reservation. i.e. | |
835 | * locking pages inside the transaction can ABBA deadlock with | |
836 | * writeback. We have to do the VFS inode size update before we truncate | |
837 | * the pagecache, however, to avoid racing with page faults beyond the | |
838 | * new EOF they are not serialised against truncate operations except by | |
839 | * page locks and size updates. | |
840 | * | |
841 | * Hence we are in a situation where a truncate can fail with ENOMEM | |
842 | * from xfs_trans_reserve(), but having already truncated the in-memory | |
843 | * version of the file (i.e. made user visible changes). There's not | |
844 | * much we can do about this, except to hope that the caller sees ENOMEM | |
845 | * and retries the truncate operation. | |
846 | */ | |
673e8e59 | 847 | error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks); |
c4ed4243 | 848 | if (error) |
76ca4c23 | 849 | return error; |
49abc3a8 | 850 | truncate_setsize(inode, newsize); |
c4ed4243 CH |
851 | |
852 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); | |
3d3c8b52 | 853 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
c4ed4243 CH |
854 | if (error) |
855 | goto out_trans_cancel; | |
856 | ||
c4ed4243 CH |
857 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; |
858 | lock_flags |= XFS_ILOCK_EXCL; | |
c4ed4243 | 859 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
ddc3415a | 860 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
861 | |
862 | /* | |
863 | * Only change the c/mtime if we are changing the size or we are | |
864 | * explicitly asked to change it. This handles the semantic difference | |
865 | * between truncate() and ftruncate() as implemented in the VFS. | |
866 | * | |
867 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
868 | * special case where we need to update the times despite not having | |
869 | * these flags set. For all other operations the VFS set these flags | |
870 | * explicitly if it wants a timestamp update. | |
871 | */ | |
fe60a8a0 CH |
872 | if (newsize != oldsize && |
873 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 CH |
874 | iattr->ia_ctime = iattr->ia_mtime = |
875 | current_fs_time(inode->i_sb); | |
fe60a8a0 | 876 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
877 | } |
878 | ||
673e8e59 CH |
879 | /* |
880 | * The first thing we do is set the size to new_size permanently on | |
881 | * disk. This way we don't have to worry about anyone ever being able | |
882 | * to look at the data being freed even in the face of a crash. | |
883 | * What we're getting around here is the case where we free a block, it | |
884 | * is allocated to another file, it is written to, and then we crash. | |
885 | * If the new data gets written to the file but the log buffers | |
886 | * containing the free and reallocation don't, then we'd end up with | |
887 | * garbage in the blocks being freed. As long as we make the new size | |
888 | * permanent before actually freeing any blocks it doesn't matter if | |
889 | * they get written to. | |
890 | */ | |
891 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
892 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
893 | ||
894 | if (newsize <= oldsize) { | |
895 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 CH |
896 | if (error) |
897 | goto out_trans_abort; | |
898 | ||
899 | /* | |
900 | * Truncated "down", so we're removing references to old data | |
901 | * here - if we delay flushing for a long time, we expose | |
902 | * ourselves unduly to the notorious NULL files problem. So, | |
903 | * we mark this inode and flush it when the file is closed, | |
904 | * and do not wait the usual (long) time for writeout. | |
905 | */ | |
906 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
907 | |
908 | /* A truncate down always removes post-EOF blocks. */ | |
909 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
910 | } |
911 | ||
fe60a8a0 | 912 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 913 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 914 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 915 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
916 | |
917 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
918 | ||
919 | XFS_STATS_INC(xs_ig_attrchg); | |
920 | ||
921 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
922 | xfs_trans_set_sync(tp); | |
923 | ||
924 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
925 | out_unlock: | |
926 | if (lock_flags) | |
927 | xfs_iunlock(ip, lock_flags); | |
928 | return error; | |
929 | ||
930 | out_trans_abort: | |
931 | commit_flags |= XFS_TRANS_ABORT; | |
932 | out_trans_cancel: | |
933 | xfs_trans_cancel(tp, commit_flags); | |
934 | goto out_unlock; | |
935 | } | |
936 | ||
1da177e4 | 937 | STATIC int |
416c6d5b | 938 | xfs_vn_setattr( |
76ca4c23 CH |
939 | struct dentry *dentry, |
940 | struct iattr *iattr) | |
1da177e4 | 941 | { |
76ca4c23 CH |
942 | struct xfs_inode *ip = XFS_I(dentry->d_inode); |
943 | int error; | |
944 | ||
945 | if (iattr->ia_valid & ATTR_SIZE) { | |
946 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
947 | error = xfs_setattr_size(ip, iattr); | |
948 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
949 | } else { | |
950 | error = xfs_setattr_nonsize(ip, iattr, 0); | |
951 | } | |
952 | ||
953 | return -error; | |
1da177e4 LT |
954 | } |
955 | ||
69ff2826 CH |
956 | STATIC int |
957 | xfs_vn_update_time( | |
958 | struct inode *inode, | |
959 | struct timespec *now, | |
960 | int flags) | |
961 | { | |
962 | struct xfs_inode *ip = XFS_I(inode); | |
963 | struct xfs_mount *mp = ip->i_mount; | |
964 | struct xfs_trans *tp; | |
965 | int error; | |
966 | ||
967 | trace_xfs_update_time(ip); | |
968 | ||
969 | tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS); | |
3d3c8b52 | 970 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0); |
69ff2826 CH |
971 | if (error) { |
972 | xfs_trans_cancel(tp, 0); | |
973 | return -error; | |
974 | } | |
975 | ||
976 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
977 | if (flags & S_CTIME) { | |
978 | inode->i_ctime = *now; | |
979 | ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec; | |
980 | ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec; | |
981 | } | |
982 | if (flags & S_MTIME) { | |
983 | inode->i_mtime = *now; | |
984 | ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec; | |
985 | ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec; | |
986 | } | |
987 | if (flags & S_ATIME) { | |
988 | inode->i_atime = *now; | |
989 | ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec; | |
990 | ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec; | |
991 | } | |
992 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
993 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); | |
994 | return -xfs_trans_commit(tp, 0); | |
995 | } | |
996 | ||
f35642e2 ES |
997 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
998 | ||
999 | /* | |
1000 | * Call fiemap helper to fill in user data. | |
1001 | * Returns positive errors to xfs_getbmap. | |
1002 | */ | |
1003 | STATIC int | |
1004 | xfs_fiemap_format( | |
1005 | void **arg, | |
1006 | struct getbmapx *bmv, | |
1007 | int *full) | |
1008 | { | |
1009 | int error; | |
1010 | struct fiemap_extent_info *fieinfo = *arg; | |
1011 | u32 fiemap_flags = 0; | |
1012 | u64 logical, physical, length; | |
1013 | ||
1014 | /* Do nothing for a hole */ | |
1015 | if (bmv->bmv_block == -1LL) | |
1016 | return 0; | |
1017 | ||
1018 | logical = BBTOB(bmv->bmv_offset); | |
1019 | physical = BBTOB(bmv->bmv_block); | |
1020 | length = BBTOB(bmv->bmv_length); | |
1021 | ||
1022 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) | |
1023 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; | |
1024 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { | |
635c4d0b JL |
1025 | fiemap_flags |= (FIEMAP_EXTENT_DELALLOC | |
1026 | FIEMAP_EXTENT_UNKNOWN); | |
f35642e2 ES |
1027 | physical = 0; /* no block yet */ |
1028 | } | |
1029 | if (bmv->bmv_oflags & BMV_OF_LAST) | |
1030 | fiemap_flags |= FIEMAP_EXTENT_LAST; | |
1031 | ||
1032 | error = fiemap_fill_next_extent(fieinfo, logical, physical, | |
1033 | length, fiemap_flags); | |
1034 | if (error > 0) { | |
1035 | error = 0; | |
1036 | *full = 1; /* user array now full */ | |
1037 | } | |
1038 | ||
1039 | return -error; | |
1040 | } | |
1041 | ||
1042 | STATIC int | |
1043 | xfs_vn_fiemap( | |
1044 | struct inode *inode, | |
1045 | struct fiemap_extent_info *fieinfo, | |
1046 | u64 start, | |
1047 | u64 length) | |
1048 | { | |
1049 | xfs_inode_t *ip = XFS_I(inode); | |
1050 | struct getbmapx bm; | |
1051 | int error; | |
1052 | ||
1053 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); | |
1054 | if (error) | |
1055 | return error; | |
1056 | ||
1057 | /* Set up bmap header for xfs internal routine */ | |
1058 | bm.bmv_offset = BTOBB(start); | |
1059 | /* Special case for whole file */ | |
1060 | if (length == FIEMAP_MAX_OFFSET) | |
1061 | bm.bmv_length = -1LL; | |
1062 | else | |
1063 | bm.bmv_length = BTOBB(length); | |
1064 | ||
97db39a1 | 1065 | /* We add one because in getbmap world count includes the header */ |
2d1ff3c7 TM |
1066 | bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : |
1067 | fieinfo->fi_extents_max + 1; | |
1068 | bm.bmv_count = min_t(__s32, bm.bmv_count, | |
1069 | (PAGE_SIZE * 16 / sizeof(struct getbmapx))); | |
9af25465 | 1070 | bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; |
f35642e2 ES |
1071 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) |
1072 | bm.bmv_iflags |= BMV_IF_ATTRFORK; | |
1073 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) | |
1074 | bm.bmv_iflags |= BMV_IF_DELALLOC; | |
1075 | ||
1076 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); | |
1077 | if (error) | |
1078 | return -error; | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
99b6436b ZYW |
1083 | STATIC int |
1084 | xfs_vn_tmpfile( | |
1085 | struct inode *dir, | |
1086 | struct dentry *dentry, | |
1087 | umode_t mode) | |
1088 | { | |
d540e43b | 1089 | return xfs_generic_create(dir, dentry, mode, 0, true); |
99b6436b ZYW |
1090 | } |
1091 | ||
41be8bed | 1092 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1093 | .get_acl = xfs_get_acl, |
2401dc29 | 1094 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1095 | .getattr = xfs_vn_getattr, |
1096 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1097 | .setxattr = generic_setxattr, |
1098 | .getxattr = generic_getxattr, | |
1099 | .removexattr = generic_removexattr, | |
416c6d5b | 1100 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1101 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1102 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1103 | }; |
1104 | ||
41be8bed | 1105 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1106 | .create = xfs_vn_create, |
1107 | .lookup = xfs_vn_lookup, | |
1108 | .link = xfs_vn_link, | |
1109 | .unlink = xfs_vn_unlink, | |
1110 | .symlink = xfs_vn_symlink, | |
1111 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1112 | /* |
1113 | * Yes, XFS uses the same method for rmdir and unlink. | |
1114 | * | |
1115 | * There are some subtile differences deeper in the code, | |
1116 | * but we use S_ISDIR to check for those. | |
1117 | */ | |
1118 | .rmdir = xfs_vn_unlink, | |
416c6d5b NS |
1119 | .mknod = xfs_vn_mknod, |
1120 | .rename = xfs_vn_rename, | |
4e34e719 | 1121 | .get_acl = xfs_get_acl, |
2401dc29 | 1122 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1123 | .getattr = xfs_vn_getattr, |
1124 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1125 | .setxattr = generic_setxattr, |
1126 | .getxattr = generic_getxattr, | |
1127 | .removexattr = generic_removexattr, | |
416c6d5b | 1128 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1129 | .update_time = xfs_vn_update_time, |
99b6436b | 1130 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1131 | }; |
1132 | ||
41be8bed | 1133 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1134 | .create = xfs_vn_create, |
1135 | .lookup = xfs_vn_ci_lookup, | |
1136 | .link = xfs_vn_link, | |
1137 | .unlink = xfs_vn_unlink, | |
1138 | .symlink = xfs_vn_symlink, | |
1139 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1140 | /* |
1141 | * Yes, XFS uses the same method for rmdir and unlink. | |
1142 | * | |
1143 | * There are some subtile differences deeper in the code, | |
1144 | * but we use S_ISDIR to check for those. | |
1145 | */ | |
1146 | .rmdir = xfs_vn_unlink, | |
384f3ced BN |
1147 | .mknod = xfs_vn_mknod, |
1148 | .rename = xfs_vn_rename, | |
4e34e719 | 1149 | .get_acl = xfs_get_acl, |
2401dc29 | 1150 | .set_acl = xfs_set_acl, |
384f3ced BN |
1151 | .getattr = xfs_vn_getattr, |
1152 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1153 | .setxattr = generic_setxattr, |
1154 | .getxattr = generic_getxattr, | |
1155 | .removexattr = generic_removexattr, | |
384f3ced | 1156 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1157 | .update_time = xfs_vn_update_time, |
99b6436b | 1158 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1159 | }; |
1160 | ||
41be8bed | 1161 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 1162 | .readlink = generic_readlink, |
416c6d5b | 1163 | .follow_link = xfs_vn_follow_link, |
96c8c442 | 1164 | .put_link = kfree_put_link, |
416c6d5b NS |
1165 | .getattr = xfs_vn_getattr, |
1166 | .setattr = xfs_vn_setattr, | |
0ec58516 LM |
1167 | .setxattr = generic_setxattr, |
1168 | .getxattr = generic_getxattr, | |
1169 | .removexattr = generic_removexattr, | |
416c6d5b | 1170 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1171 | .update_time = xfs_vn_update_time, |
1da177e4 | 1172 | }; |
41be8bed CH |
1173 | |
1174 | STATIC void | |
1175 | xfs_diflags_to_iflags( | |
1176 | struct inode *inode, | |
1177 | struct xfs_inode *ip) | |
1178 | { | |
1179 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
1180 | inode->i_flags |= S_IMMUTABLE; | |
1181 | else | |
1182 | inode->i_flags &= ~S_IMMUTABLE; | |
1183 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
1184 | inode->i_flags |= S_APPEND; | |
1185 | else | |
1186 | inode->i_flags &= ~S_APPEND; | |
1187 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
1188 | inode->i_flags |= S_SYNC; | |
1189 | else | |
1190 | inode->i_flags &= ~S_SYNC; | |
1191 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
1192 | inode->i_flags |= S_NOATIME; | |
1193 | else | |
1194 | inode->i_flags &= ~S_NOATIME; | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * Initialize the Linux inode, set up the operation vectors and | |
1199 | * unlock the inode. | |
1200 | * | |
1201 | * When reading existing inodes from disk this is called directly | |
1202 | * from xfs_iget, when creating a new inode it is called from | |
1203 | * xfs_ialloc after setting up the inode. | |
bf904248 DC |
1204 | * |
1205 | * We are always called with an uninitialised linux inode here. | |
1206 | * We need to initialise the necessary fields and take a reference | |
1207 | * on it. | |
41be8bed CH |
1208 | */ |
1209 | void | |
1210 | xfs_setup_inode( | |
1211 | struct xfs_inode *ip) | |
1212 | { | |
bf904248 | 1213 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1214 | gfp_t gfp_mask; |
bf904248 DC |
1215 | |
1216 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1217 | inode->i_state = I_NEW; |
646ec461 CH |
1218 | |
1219 | inode_sb_list_add(inode); | |
c6f6cd06 CH |
1220 | /* make the inode look hashed for the writeback code */ |
1221 | hlist_add_fake(&inode->i_hash); | |
41be8bed CH |
1222 | |
1223 | inode->i_mode = ip->i_d.di_mode; | |
bfe86848 | 1224 | set_nlink(inode, ip->i_d.di_nlink); |
7aab1b28 DE |
1225 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1226 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed CH |
1227 | |
1228 | switch (inode->i_mode & S_IFMT) { | |
1229 | case S_IFBLK: | |
1230 | case S_IFCHR: | |
1231 | inode->i_rdev = | |
1232 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
1233 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
1234 | break; | |
1235 | default: | |
1236 | inode->i_rdev = 0; | |
1237 | break; | |
1238 | } | |
1239 | ||
1240 | inode->i_generation = ip->i_d.di_gen; | |
1241 | i_size_write(inode, ip->i_d.di_size); | |
1242 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
1243 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
1244 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
1245 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
1246 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
1247 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
1248 | xfs_diflags_to_iflags(inode, ip); | |
41be8bed | 1249 | |
4bceb18f | 1250 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; |
93a8614e | 1251 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); |
41be8bed CH |
1252 | switch (inode->i_mode & S_IFMT) { |
1253 | case S_IFREG: | |
1254 | inode->i_op = &xfs_inode_operations; | |
1255 | inode->i_fop = &xfs_file_operations; | |
1256 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1257 | break; | |
1258 | case S_IFDIR: | |
93a8614e | 1259 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
41be8bed CH |
1260 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) |
1261 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1262 | else | |
1263 | inode->i_op = &xfs_dir_inode_operations; | |
1264 | inode->i_fop = &xfs_dir_file_operations; | |
32c5483a | 1265 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
41be8bed CH |
1266 | break; |
1267 | case S_IFLNK: | |
1268 | inode->i_op = &xfs_symlink_inode_operations; | |
1269 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) | |
1270 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1271 | break; | |
1272 | default: | |
1273 | inode->i_op = &xfs_inode_operations; | |
1274 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1275 | break; | |
1276 | } | |
1277 | ||
ad22c7a0 DC |
1278 | /* |
1279 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1280 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1281 | * stacks or deadlocking. | |
1282 | */ | |
1283 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1284 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1285 | ||
510792ee CH |
1286 | /* |
1287 | * If there is no attribute fork no ACL can exist on this inode, | |
1288 | * and it can't have any file capabilities attached to it either. | |
1289 | */ | |
1290 | if (!XFS_IFORK_Q(ip)) { | |
1291 | inode_has_no_xattr(inode); | |
6311b108 | 1292 | cache_no_acl(inode); |
510792ee | 1293 | } |
6311b108 | 1294 | |
41be8bed CH |
1295 | xfs_iflags_clear(ip, XFS_INEW); |
1296 | barrier(); | |
1297 | ||
1298 | unlock_new_inode(inode); | |
1299 | } |