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" |
781355c6 | 40 | #include "xfs_pnfs.h" |
68a9f5e7 | 41 | #include "xfs_iomap.h" |
1da177e4 | 42 | |
16f7e0fe | 43 | #include <linux/capability.h> |
1da177e4 | 44 | #include <linux/xattr.h> |
ef14f0c1 | 45 | #include <linux/posix_acl.h> |
446ada4a | 46 | #include <linux/security.h> |
d2bb140e | 47 | #include <linux/iomap.h> |
5a0e3ad6 | 48 | #include <linux/slab.h> |
1da177e4 | 49 | |
93a8614e DC |
50 | /* |
51 | * Directories have different lock order w.r.t. mmap_sem compared to regular | |
52 | * files. This is due to readdir potentially triggering page faults on a user | |
53 | * buffer inside filldir(), and this happens with the ilock on the directory | |
54 | * held. For regular files, the lock order is the other way around - the | |
55 | * mmap_sem is taken during the page fault, and then we lock the ilock to do | |
56 | * block mapping. Hence we need a different class for the directory ilock so | |
57 | * that lockdep can tell them apart. | |
58 | */ | |
59 | static struct lock_class_key xfs_nondir_ilock_class; | |
60 | static struct lock_class_key xfs_dir_ilock_class; | |
61 | ||
8d2a5e6e DC |
62 | static int |
63 | xfs_initxattrs( | |
64 | struct inode *inode, | |
65 | const struct xattr *xattr_array, | |
66 | void *fs_info) | |
9d8f13ba | 67 | { |
8d2a5e6e DC |
68 | const struct xattr *xattr; |
69 | struct xfs_inode *ip = XFS_I(inode); | |
70 | int error = 0; | |
9d8f13ba MZ |
71 | |
72 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
2451337d | 73 | error = xfs_attr_set(ip, xattr->name, xattr->value, |
a5a14de2 | 74 | xattr->value_len, ATTR_SECURE); |
9d8f13ba MZ |
75 | if (error < 0) |
76 | break; | |
77 | } | |
78 | return error; | |
79 | } | |
80 | ||
446ada4a NS |
81 | /* |
82 | * Hook in SELinux. This is not quite correct yet, what we really need | |
83 | * here (as we do for default ACLs) is a mechanism by which creation of | |
84 | * these attrs can be journalled at inode creation time (along with the | |
85 | * inode, of course, such that log replay can't cause these to be lost). | |
86 | */ | |
9d8f13ba | 87 | |
446ada4a | 88 | STATIC int |
416c6d5b | 89 | xfs_init_security( |
af048193 | 90 | struct inode *inode, |
2a7dba39 EP |
91 | struct inode *dir, |
92 | const struct qstr *qstr) | |
446ada4a | 93 | { |
2451337d | 94 | return security_inode_init_security(inode, dir, qstr, |
a5a14de2 | 95 | &xfs_initxattrs, NULL); |
446ada4a NS |
96 | } |
97 | ||
556b8b16 BN |
98 | static void |
99 | xfs_dentry_to_name( | |
fab8eef8 AG |
100 | struct xfs_name *namep, |
101 | struct dentry *dentry) | |
102 | { | |
103 | namep->name = dentry->d_name.name; | |
104 | namep->len = dentry->d_name.len; | |
105 | namep->type = XFS_DIR3_FT_UNKNOWN; | |
106 | } | |
107 | ||
108 | static int | |
109 | xfs_dentry_mode_to_name( | |
556b8b16 | 110 | struct xfs_name *namep, |
0cb97766 DC |
111 | struct dentry *dentry, |
112 | int mode) | |
556b8b16 BN |
113 | { |
114 | namep->name = dentry->d_name.name; | |
115 | namep->len = dentry->d_name.len; | |
1fc4d33f | 116 | namep->type = xfs_mode_to_ftype(mode); |
fab8eef8 AG |
117 | |
118 | if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN)) | |
119 | return -EFSCORRUPTED; | |
120 | ||
121 | return 0; | |
556b8b16 BN |
122 | } |
123 | ||
7989cb8e | 124 | STATIC void |
416c6d5b | 125 | xfs_cleanup_inode( |
739bfb2a | 126 | struct inode *dir, |
af048193 | 127 | struct inode *inode, |
8f112e3b | 128 | struct dentry *dentry) |
3a69c7dc | 129 | { |
556b8b16 | 130 | struct xfs_name teardown; |
3a69c7dc YL |
131 | |
132 | /* Oh, the horror. | |
220b5284 | 133 | * If we can't add the ACL or we fail in |
416c6d5b | 134 | * xfs_init_security we must back out. |
3a69c7dc YL |
135 | * ENOSPC can hit here, among other things. |
136 | */ | |
fab8eef8 | 137 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc | 138 | |
8f112e3b | 139 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
3a69c7dc YL |
140 | } |
141 | ||
1da177e4 | 142 | STATIC int |
d540e43b | 143 | xfs_generic_create( |
1da177e4 LT |
144 | struct inode *dir, |
145 | struct dentry *dentry, | |
1a67aafb | 146 | umode_t mode, |
d540e43b BF |
147 | dev_t rdev, |
148 | bool tmpfile) /* unnamed file */ | |
1da177e4 | 149 | { |
db0bb7ba | 150 | struct inode *inode; |
979ebab1 | 151 | struct xfs_inode *ip = NULL; |
2401dc29 | 152 | struct posix_acl *default_acl, *acl; |
556b8b16 | 153 | struct xfs_name name; |
1da177e4 LT |
154 | int error; |
155 | ||
156 | /* | |
157 | * Irix uses Missed'em'V split, but doesn't want to see | |
158 | * the upper 5 bits of (14bit) major. | |
159 | */ | |
517b5e8c CH |
160 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
161 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
162 | return -EINVAL; | |
163 | rdev = sysv_encode_dev(rdev); | |
164 | } else { | |
165 | rdev = 0; | |
166 | } | |
1da177e4 | 167 | |
2401dc29 CH |
168 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
169 | if (error) | |
170 | return error; | |
1da177e4 | 171 | |
fab8eef8 AG |
172 | /* Verify mode is valid also for tmpfile case */ |
173 | error = xfs_dentry_mode_to_name(&name, dentry, mode); | |
174 | if (unlikely(error)) | |
175 | goto out_free_acl; | |
176 | ||
d540e43b | 177 | if (!tmpfile) { |
d540e43b BF |
178 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
179 | } else { | |
180 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); | |
181 | } | |
db0bb7ba CH |
182 | if (unlikely(error)) |
183 | goto out_free_acl; | |
446ada4a | 184 | |
01651646 | 185 | inode = VFS_I(ip); |
979ebab1 | 186 | |
2a7dba39 | 187 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
188 | if (unlikely(error)) |
189 | goto out_cleanup_inode; | |
190 | ||
2401dc29 | 191 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 192 | if (default_acl) { |
8ba35875 | 193 | error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
2401dc29 | 194 | if (error) |
db0bb7ba | 195 | goto out_cleanup_inode; |
1da177e4 | 196 | } |
2401dc29 | 197 | if (acl) { |
8ba35875 | 198 | error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
2401dc29 CH |
199 | if (error) |
200 | goto out_cleanup_inode; | |
201 | } | |
202 | #endif | |
1da177e4 | 203 | |
2b3d1d41 CH |
204 | xfs_setup_iops(ip); |
205 | ||
d540e43b BF |
206 | if (tmpfile) |
207 | d_tmpfile(dentry, inode); | |
208 | else | |
209 | d_instantiate(dentry, inode); | |
210 | ||
58c90473 DC |
211 | xfs_finish_inode_setup(ip); |
212 | ||
2401dc29 CH |
213 | out_free_acl: |
214 | if (default_acl) | |
215 | posix_acl_release(default_acl); | |
216 | if (acl) | |
217 | posix_acl_release(acl); | |
2451337d | 218 | return error; |
db0bb7ba CH |
219 | |
220 | out_cleanup_inode: | |
58c90473 | 221 | xfs_finish_inode_setup(ip); |
d540e43b BF |
222 | if (!tmpfile) |
223 | xfs_cleanup_inode(dir, inode, dentry); | |
224 | iput(inode); | |
2401dc29 | 225 | goto out_free_acl; |
1da177e4 LT |
226 | } |
227 | ||
d540e43b BF |
228 | STATIC int |
229 | xfs_vn_mknod( | |
230 | struct inode *dir, | |
231 | struct dentry *dentry, | |
232 | umode_t mode, | |
233 | dev_t rdev) | |
234 | { | |
235 | return xfs_generic_create(dir, dentry, mode, rdev, false); | |
236 | } | |
237 | ||
1da177e4 | 238 | STATIC int |
416c6d5b | 239 | xfs_vn_create( |
1da177e4 LT |
240 | struct inode *dir, |
241 | struct dentry *dentry, | |
4acdaf27 | 242 | umode_t mode, |
ebfc3b49 | 243 | bool flags) |
1da177e4 | 244 | { |
416c6d5b | 245 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
246 | } |
247 | ||
248 | STATIC int | |
416c6d5b | 249 | xfs_vn_mkdir( |
1da177e4 LT |
250 | struct inode *dir, |
251 | struct dentry *dentry, | |
18bb1db3 | 252 | umode_t mode) |
1da177e4 | 253 | { |
416c6d5b | 254 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
255 | } |
256 | ||
257 | STATIC struct dentry * | |
416c6d5b | 258 | xfs_vn_lookup( |
1da177e4 LT |
259 | struct inode *dir, |
260 | struct dentry *dentry, | |
00cd8dd3 | 261 | unsigned int flags) |
1da177e4 | 262 | { |
ef1f5e7a | 263 | struct xfs_inode *cip; |
556b8b16 | 264 | struct xfs_name name; |
1da177e4 LT |
265 | int error; |
266 | ||
267 | if (dentry->d_name.len >= MAXNAMELEN) | |
268 | return ERR_PTR(-ENAMETOOLONG); | |
269 | ||
fab8eef8 | 270 | xfs_dentry_to_name(&name, dentry); |
384f3ced | 271 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 272 | if (unlikely(error)) { |
2451337d DC |
273 | if (unlikely(error != -ENOENT)) |
274 | return ERR_PTR(error); | |
1da177e4 LT |
275 | d_add(dentry, NULL); |
276 | return NULL; | |
277 | } | |
278 | ||
01651646 | 279 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
280 | } |
281 | ||
384f3ced BN |
282 | STATIC struct dentry * |
283 | xfs_vn_ci_lookup( | |
284 | struct inode *dir, | |
285 | struct dentry *dentry, | |
00cd8dd3 | 286 | unsigned int flags) |
384f3ced BN |
287 | { |
288 | struct xfs_inode *ip; | |
289 | struct xfs_name xname; | |
290 | struct xfs_name ci_name; | |
291 | struct qstr dname; | |
292 | int error; | |
293 | ||
294 | if (dentry->d_name.len >= MAXNAMELEN) | |
295 | return ERR_PTR(-ENAMETOOLONG); | |
296 | ||
fab8eef8 | 297 | xfs_dentry_to_name(&xname, dentry); |
384f3ced BN |
298 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
299 | if (unlikely(error)) { | |
2451337d DC |
300 | if (unlikely(error != -ENOENT)) |
301 | return ERR_PTR(error); | |
866d5dc9 BN |
302 | /* |
303 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
304 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
305 | * with CI filesystems). | |
306 | */ | |
384f3ced BN |
307 | return NULL; |
308 | } | |
309 | ||
310 | /* if exact match, just splice and exit */ | |
311 | if (!ci_name.name) | |
01651646 | 312 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
313 | |
314 | /* else case-insensitive match... */ | |
315 | dname.name = ci_name.name; | |
316 | dname.len = ci_name.len; | |
e45b590b | 317 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
318 | kmem_free(ci_name.name); |
319 | return dentry; | |
320 | } | |
321 | ||
1da177e4 | 322 | STATIC int |
416c6d5b | 323 | xfs_vn_link( |
1da177e4 LT |
324 | struct dentry *old_dentry, |
325 | struct inode *dir, | |
326 | struct dentry *dentry) | |
327 | { | |
2b0143b5 | 328 | struct inode *inode = d_inode(old_dentry); |
556b8b16 | 329 | struct xfs_name name; |
1da177e4 LT |
330 | int error; |
331 | ||
fab8eef8 AG |
332 | error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode); |
333 | if (unlikely(error)) | |
334 | return error; | |
1da177e4 | 335 | |
556b8b16 | 336 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 337 | if (unlikely(error)) |
2451337d | 338 | return error; |
a3da7896 | 339 | |
7de9c6ee | 340 | ihold(inode); |
a3da7896 CH |
341 | d_instantiate(dentry, inode); |
342 | return 0; | |
1da177e4 LT |
343 | } |
344 | ||
345 | STATIC int | |
416c6d5b | 346 | xfs_vn_unlink( |
1da177e4 LT |
347 | struct inode *dir, |
348 | struct dentry *dentry) | |
349 | { | |
556b8b16 | 350 | struct xfs_name name; |
1da177e4 LT |
351 | int error; |
352 | ||
fab8eef8 | 353 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 354 | |
2b0143b5 | 355 | error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); |
e5700704 CH |
356 | if (error) |
357 | return error; | |
358 | ||
359 | /* | |
360 | * With unlink, the VFS makes the dentry "negative": no inode, | |
361 | * but still hashed. This is incompatible with case-insensitive | |
362 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
363 | */ | |
364 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
365 | d_invalidate(dentry); | |
366 | return 0; | |
1da177e4 LT |
367 | } |
368 | ||
369 | STATIC int | |
416c6d5b | 370 | xfs_vn_symlink( |
1da177e4 LT |
371 | struct inode *dir, |
372 | struct dentry *dentry, | |
373 | const char *symname) | |
374 | { | |
3937be5b CH |
375 | struct inode *inode; |
376 | struct xfs_inode *cip = NULL; | |
556b8b16 | 377 | struct xfs_name name; |
1da177e4 | 378 | int error; |
576b1d67 | 379 | umode_t mode; |
1da177e4 | 380 | |
3e5daf05 | 381 | mode = S_IFLNK | |
ce3b0f8d | 382 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
fab8eef8 AG |
383 | error = xfs_dentry_mode_to_name(&name, dentry, mode); |
384 | if (unlikely(error)) | |
385 | goto out; | |
1da177e4 | 386 | |
6c77b0ea | 387 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
388 | if (unlikely(error)) |
389 | goto out; | |
390 | ||
01651646 | 391 | inode = VFS_I(cip); |
3937be5b | 392 | |
2a7dba39 | 393 | error = xfs_init_security(inode, dir, &dentry->d_name); |
3937be5b CH |
394 | if (unlikely(error)) |
395 | goto out_cleanup_inode; | |
396 | ||
2b3d1d41 CH |
397 | xfs_setup_iops(cip); |
398 | ||
3937be5b | 399 | d_instantiate(dentry, inode); |
58c90473 | 400 | xfs_finish_inode_setup(cip); |
3937be5b CH |
401 | return 0; |
402 | ||
403 | out_cleanup_inode: | |
58c90473 | 404 | xfs_finish_inode_setup(cip); |
8f112e3b | 405 | xfs_cleanup_inode(dir, inode, dentry); |
d540e43b | 406 | iput(inode); |
3937be5b | 407 | out: |
2451337d | 408 | return error; |
1da177e4 LT |
409 | } |
410 | ||
1da177e4 | 411 | STATIC int |
416c6d5b | 412 | xfs_vn_rename( |
1da177e4 LT |
413 | struct inode *odir, |
414 | struct dentry *odentry, | |
415 | struct inode *ndir, | |
dbe1b5ca CM |
416 | struct dentry *ndentry, |
417 | unsigned int flags) | |
1da177e4 | 418 | { |
2b0143b5 | 419 | struct inode *new_inode = d_inode(ndentry); |
d31a1825 | 420 | int omode = 0; |
fab8eef8 | 421 | int error; |
556b8b16 BN |
422 | struct xfs_name oname; |
423 | struct xfs_name nname; | |
1da177e4 | 424 | |
7dcf5c3e | 425 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
dbe1b5ca CM |
426 | return -EINVAL; |
427 | ||
d31a1825 CM |
428 | /* if we are exchanging files, we need to set i_mode of both files */ |
429 | if (flags & RENAME_EXCHANGE) | |
2b0143b5 | 430 | omode = d_inode(ndentry)->i_mode; |
d31a1825 | 431 | |
fab8eef8 AG |
432 | error = xfs_dentry_mode_to_name(&oname, odentry, omode); |
433 | if (omode && unlikely(error)) | |
434 | return error; | |
435 | ||
436 | error = xfs_dentry_mode_to_name(&nname, ndentry, | |
437 | d_inode(odentry)->i_mode); | |
438 | if (unlikely(error)) | |
439 | return error; | |
556b8b16 | 440 | |
2b0143b5 | 441 | return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)), |
dbe1b5ca | 442 | XFS_I(ndir), &nname, |
d31a1825 | 443 | new_inode ? XFS_I(new_inode) : NULL, flags); |
1da177e4 LT |
444 | } |
445 | ||
446 | /* | |
447 | * careful here - this function can get called recursively, so | |
448 | * we need to be very careful about how much stack we use. | |
449 | * uio is kmalloced for this reason... | |
450 | */ | |
680baacb | 451 | STATIC const char * |
6b255391 | 452 | xfs_vn_get_link( |
1da177e4 | 453 | struct dentry *dentry, |
6b255391 | 454 | struct inode *inode, |
fceef393 | 455 | struct delayed_call *done) |
1da177e4 | 456 | { |
1da177e4 | 457 | char *link; |
804c83c3 | 458 | int error = -ENOMEM; |
1da177e4 | 459 | |
6b255391 AV |
460 | if (!dentry) |
461 | return ERR_PTR(-ECHILD); | |
462 | ||
6eb0b8df | 463 | link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL); |
804c83c3 CH |
464 | if (!link) |
465 | goto out_err; | |
1da177e4 | 466 | |
2b0143b5 | 467 | error = xfs_readlink(XFS_I(d_inode(dentry)), link); |
804c83c3 CH |
468 | if (unlikely(error)) |
469 | goto out_kfree; | |
1da177e4 | 470 | |
fceef393 AV |
471 | set_delayed_call(done, kfree_link, link); |
472 | return link; | |
804c83c3 CH |
473 | |
474 | out_kfree: | |
475 | kfree(link); | |
476 | out_err: | |
680baacb | 477 | return ERR_PTR(error); |
1da177e4 LT |
478 | } |
479 | ||
30ee052e CH |
480 | STATIC const char * |
481 | xfs_vn_get_link_inline( | |
482 | struct dentry *dentry, | |
483 | struct inode *inode, | |
484 | struct delayed_call *done) | |
485 | { | |
486 | ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE); | |
487 | return XFS_I(inode)->i_df.if_u1.if_data; | |
488 | } | |
489 | ||
1da177e4 | 490 | STATIC int |
416c6d5b | 491 | xfs_vn_getattr( |
a528d35e DH |
492 | const struct path *path, |
493 | struct kstat *stat, | |
494 | u32 request_mask, | |
495 | unsigned int query_flags) | |
1da177e4 | 496 | { |
a528d35e | 497 | struct inode *inode = d_inode(path->dentry); |
c43f4087 CH |
498 | struct xfs_inode *ip = XFS_I(inode); |
499 | struct xfs_mount *mp = ip->i_mount; | |
500 | ||
cca28fb8 | 501 | trace_xfs_getattr(ip); |
c43f4087 CH |
502 | |
503 | if (XFS_FORCED_SHUTDOWN(mp)) | |
b474c7ae | 504 | return -EIO; |
c43f4087 CH |
505 | |
506 | stat->size = XFS_ISIZE(ip); | |
507 | stat->dev = inode->i_sb->s_dev; | |
c19b3b05 | 508 | stat->mode = inode->i_mode; |
54d7b5c1 | 509 | stat->nlink = inode->i_nlink; |
7aab1b28 DE |
510 | stat->uid = inode->i_uid; |
511 | stat->gid = inode->i_gid; | |
c43f4087 | 512 | stat->ino = ip->i_ino; |
c43f4087 | 513 | stat->atime = inode->i_atime; |
f9581b14 CH |
514 | stat->mtime = inode->i_mtime; |
515 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
516 | stat->blocks = |
517 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
518 | ||
5f955f26 DW |
519 | if (ip->i_d.di_version == 3) { |
520 | if (request_mask & STATX_BTIME) { | |
521 | stat->result_mask |= STATX_BTIME; | |
522 | stat->btime.tv_sec = ip->i_d.di_crtime.t_sec; | |
523 | stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec; | |
524 | } | |
525 | } | |
526 | ||
527 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
528 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
529 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
530 | stat->attributes |= STATX_ATTR_APPEND; | |
531 | if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP) | |
532 | stat->attributes |= STATX_ATTR_NODUMP; | |
c43f4087 CH |
533 | |
534 | switch (inode->i_mode & S_IFMT) { | |
535 | case S_IFBLK: | |
536 | case S_IFCHR: | |
537 | stat->blksize = BLKDEV_IOSIZE; | |
538 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
539 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
540 | break; | |
541 | default: | |
71ddabb9 | 542 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
543 | /* |
544 | * If the file blocks are being allocated from a | |
545 | * realtime volume, then return the inode's realtime | |
546 | * extent size or the realtime volume's extent size. | |
547 | */ | |
548 | stat->blksize = | |
549 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
550 | } else | |
551 | stat->blksize = xfs_preferred_iosize(mp); | |
552 | stat->rdev = 0; | |
553 | break; | |
69e23b9a | 554 | } |
c43f4087 CH |
555 | |
556 | return 0; | |
1da177e4 LT |
557 | } |
558 | ||
56c19e89 DC |
559 | static void |
560 | xfs_setattr_mode( | |
56c19e89 DC |
561 | struct xfs_inode *ip, |
562 | struct iattr *iattr) | |
563 | { | |
0c3d88df CH |
564 | struct inode *inode = VFS_I(ip); |
565 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 566 | |
56c19e89 DC |
567 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
568 | ||
56c19e89 DC |
569 | inode->i_mode &= S_IFMT; |
570 | inode->i_mode |= mode & ~S_IFMT; | |
571 | } | |
572 | ||
52785112 | 573 | void |
c91c46c1 CH |
574 | xfs_setattr_time( |
575 | struct xfs_inode *ip, | |
576 | struct iattr *iattr) | |
577 | { | |
578 | struct inode *inode = VFS_I(ip); | |
579 | ||
580 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
581 | ||
3987848c | 582 | if (iattr->ia_valid & ATTR_ATIME) |
c91c46c1 | 583 | inode->i_atime = iattr->ia_atime; |
3987848c | 584 | if (iattr->ia_valid & ATTR_CTIME) |
c91c46c1 | 585 | inode->i_ctime = iattr->ia_ctime; |
3987848c | 586 | if (iattr->ia_valid & ATTR_MTIME) |
c91c46c1 | 587 | inode->i_mtime = iattr->ia_mtime; |
c91c46c1 CH |
588 | } |
589 | ||
69bca807 JK |
590 | static int |
591 | xfs_vn_change_ok( | |
592 | struct dentry *dentry, | |
593 | struct iattr *iattr) | |
594 | { | |
31051c85 | 595 | struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; |
69bca807 JK |
596 | |
597 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
598 | return -EROFS; | |
599 | ||
600 | if (XFS_FORCED_SHUTDOWN(mp)) | |
601 | return -EIO; | |
602 | ||
31051c85 | 603 | return setattr_prepare(dentry, iattr); |
69bca807 JK |
604 | } |
605 | ||
606 | /* | |
607 | * Set non-size attributes of an inode. | |
608 | * | |
609 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 610 | * setattr_prepare() or otherwise verifying the change is fine. |
69bca807 | 611 | */ |
c4ed4243 CH |
612 | int |
613 | xfs_setattr_nonsize( | |
614 | struct xfs_inode *ip, | |
615 | struct iattr *iattr, | |
616 | int flags) | |
617 | { | |
618 | xfs_mount_t *mp = ip->i_mount; | |
619 | struct inode *inode = VFS_I(ip); | |
620 | int mask = iattr->ia_valid; | |
621 | xfs_trans_t *tp; | |
622 | int error; | |
7aab1b28 DE |
623 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
624 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
625 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
626 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
627 | ||
c4ed4243 CH |
628 | ASSERT((mask & ATTR_SIZE) == 0); |
629 | ||
630 | /* | |
631 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
632 | * before we start any other transactions. Trying to do this later | |
633 | * is messy. We don't care to take a readlock to look at the ids | |
634 | * in inode here, because we can't hold it across the trans_reserve. | |
635 | * If the IDs do change before we take the ilock, we're covered | |
636 | * because the i_*dquot fields will get updated anyway. | |
637 | */ | |
638 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
639 | uint qflags = 0; | |
640 | ||
641 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
642 | uid = iattr->ia_uid; | |
643 | qflags |= XFS_QMOPT_UQUOTA; | |
644 | } else { | |
7aab1b28 | 645 | uid = inode->i_uid; |
c4ed4243 CH |
646 | } |
647 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
648 | gid = iattr->ia_gid; | |
649 | qflags |= XFS_QMOPT_GQUOTA; | |
650 | } else { | |
7aab1b28 | 651 | gid = inode->i_gid; |
c4ed4243 CH |
652 | } |
653 | ||
654 | /* | |
655 | * We take a reference when we initialize udqp and gdqp, | |
656 | * so it is important that we never blindly double trip on | |
657 | * the same variable. See xfs_create() for an example. | |
658 | */ | |
659 | ASSERT(udqp == NULL); | |
660 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
661 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
662 | xfs_kgid_to_gid(gid), | |
663 | xfs_get_projid(ip), | |
664 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
665 | if (error) |
666 | return error; | |
667 | } | |
668 | ||
253f4911 | 669 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
c4ed4243 | 670 | if (error) |
253f4911 | 671 | goto out_dqrele; |
c4ed4243 CH |
672 | |
673 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
253f4911 | 674 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
675 | |
676 | /* | |
677 | * Change file ownership. Must be the owner or privileged. | |
678 | */ | |
679 | if (mask & (ATTR_UID|ATTR_GID)) { | |
680 | /* | |
681 | * These IDs could have changed since we last looked at them. | |
682 | * But, we're assured that if the ownership did change | |
683 | * while we didn't have the inode locked, inode's dquot(s) | |
684 | * would have changed also. | |
685 | */ | |
7aab1b28 DE |
686 | iuid = inode->i_uid; |
687 | igid = inode->i_gid; | |
c4ed4243 CH |
688 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
689 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
690 | ||
691 | /* | |
692 | * Do a quota reservation only if uid/gid is actually | |
693 | * going to change. | |
694 | */ | |
695 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
696 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
697 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
698 | ASSERT(tp); |
699 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 700 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
701 | XFS_QMOPT_FORCE_RES : 0); |
702 | if (error) /* out of quota */ | |
253f4911 | 703 | goto out_cancel; |
c4ed4243 CH |
704 | } |
705 | } | |
706 | ||
c4ed4243 CH |
707 | /* |
708 | * Change file ownership. Must be the owner or privileged. | |
709 | */ | |
710 | if (mask & (ATTR_UID|ATTR_GID)) { | |
711 | /* | |
712 | * CAP_FSETID overrides the following restrictions: | |
713 | * | |
714 | * The set-user-ID and set-group-ID bits of a file will be | |
715 | * cleared upon successful return from chown() | |
716 | */ | |
c19b3b05 | 717 | if ((inode->i_mode & (S_ISUID|S_ISGID)) && |
c4ed4243 | 718 | !capable(CAP_FSETID)) |
c19b3b05 | 719 | inode->i_mode &= ~(S_ISUID|S_ISGID); |
c4ed4243 CH |
720 | |
721 | /* | |
722 | * Change the ownerships and register quota modifications | |
723 | * in the transaction. | |
724 | */ | |
7aab1b28 | 725 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
726 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
727 | ASSERT(mask & ATTR_UID); | |
728 | ASSERT(udqp); | |
729 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
730 | &ip->i_udquot, udqp); | |
731 | } | |
7aab1b28 | 732 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
733 | inode->i_uid = uid; |
734 | } | |
7aab1b28 | 735 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 736 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
737 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
738 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
739 | ASSERT(mask & ATTR_GID); |
740 | ASSERT(gdqp); | |
741 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
742 | &ip->i_gdquot, gdqp); | |
743 | } | |
7aab1b28 | 744 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
745 | inode->i_gid = gid; |
746 | } | |
747 | } | |
748 | ||
56c19e89 | 749 | if (mask & ATTR_MODE) |
0c3d88df | 750 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
751 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
752 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
753 | |
754 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
755 | ||
ff6d6af2 | 756 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
757 | |
758 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
759 | xfs_trans_set_sync(tp); | |
70393313 | 760 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
761 | |
762 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
763 | ||
764 | /* | |
765 | * Release any dquot(s) the inode had kept before chown. | |
766 | */ | |
767 | xfs_qm_dqrele(olddquot1); | |
768 | xfs_qm_dqrele(olddquot2); | |
769 | xfs_qm_dqrele(udqp); | |
770 | xfs_qm_dqrele(gdqp); | |
771 | ||
772 | if (error) | |
b474c7ae | 773 | return error; |
c4ed4243 CH |
774 | |
775 | /* | |
776 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
777 | * update. We could avoid this with linked transactions | |
778 | * and passing down the transaction pointer all the way | |
779 | * to attr_set. No previous user of the generic | |
780 | * Posix ACL code seems to care about this issue either. | |
781 | */ | |
782 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2451337d | 783 | error = posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 | 784 | if (error) |
b474c7ae | 785 | return error; |
c4ed4243 CH |
786 | } |
787 | ||
788 | return 0; | |
789 | ||
253f4911 | 790 | out_cancel: |
4906e215 | 791 | xfs_trans_cancel(tp); |
253f4911 | 792 | out_dqrele: |
c4ed4243 CH |
793 | xfs_qm_dqrele(udqp); |
794 | xfs_qm_dqrele(gdqp); | |
795 | return error; | |
796 | } | |
797 | ||
69bca807 JK |
798 | int |
799 | xfs_vn_setattr_nonsize( | |
800 | struct dentry *dentry, | |
801 | struct iattr *iattr) | |
802 | { | |
803 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
804 | int error; | |
805 | ||
806 | trace_xfs_setattr(ip); | |
807 | ||
808 | error = xfs_vn_change_ok(dentry, iattr); | |
809 | if (error) | |
810 | return error; | |
811 | return xfs_setattr_nonsize(ip, iattr, 0); | |
812 | } | |
813 | ||
c4ed4243 CH |
814 | /* |
815 | * Truncate file. Must have write permission and not be a directory. | |
69bca807 JK |
816 | * |
817 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 818 | * setattr_prepare() or otherwise verifying the change is fine. |
c4ed4243 CH |
819 | */ |
820 | int | |
821 | xfs_setattr_size( | |
822 | struct xfs_inode *ip, | |
76ca4c23 | 823 | struct iattr *iattr) |
c4ed4243 CH |
824 | { |
825 | struct xfs_mount *mp = ip->i_mount; | |
826 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 827 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
828 | struct xfs_trans *tp; |
829 | int error; | |
f38996f5 | 830 | uint lock_flags = 0; |
5885ebda | 831 | bool did_zeroing = false; |
c4ed4243 | 832 | |
76ca4c23 | 833 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
e8e9ad42 | 834 | ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); |
c19b3b05 | 835 | ASSERT(S_ISREG(inode->i_mode)); |
fe60a8a0 CH |
836 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
837 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 838 | |
ce7ae151 | 839 | oldsize = inode->i_size; |
673e8e59 CH |
840 | newsize = iattr->ia_size; |
841 | ||
c4ed4243 CH |
842 | /* |
843 | * Short circuit the truncate case for zero length files. | |
844 | */ | |
673e8e59 | 845 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 846 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 847 | return 0; |
681b1200 CH |
848 | |
849 | /* | |
850 | * Use the regular setattr path to update the timestamps. | |
851 | */ | |
681b1200 CH |
852 | iattr->ia_valid &= ~ATTR_SIZE; |
853 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
854 | } |
855 | ||
856 | /* | |
857 | * Make sure that the dquots are attached to the inode. | |
858 | */ | |
f38996f5 | 859 | error = xfs_qm_dqattach(ip, 0); |
c4ed4243 | 860 | if (error) |
76ca4c23 | 861 | return error; |
c4ed4243 | 862 | |
f0c6bcba CH |
863 | /* |
864 | * Wait for all direct I/O to complete. | |
865 | */ | |
866 | inode_dio_wait(inode); | |
867 | ||
c4ed4243 | 868 | /* |
5885ebda DC |
869 | * File data changes must be complete before we start the transaction to |
870 | * modify the inode. This needs to be done before joining the inode to | |
871 | * the transaction because the inode cannot be unlocked once it is a | |
872 | * part of the transaction. | |
873 | * | |
f0c6bcba CH |
874 | * Start with zeroing any data beyond EOF that we may expose on file |
875 | * extension, or zeroing out the rest of the block on a downward | |
876 | * truncate. | |
c4ed4243 | 877 | */ |
673e8e59 | 878 | if (newsize > oldsize) { |
5885ebda | 879 | error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing); |
f0c6bcba | 880 | } else { |
459f0fbc CH |
881 | error = iomap_truncate_page(inode, newsize, &did_zeroing, |
882 | &xfs_iomap_ops); | |
c4ed4243 | 883 | } |
c4ed4243 | 884 | |
f0c6bcba CH |
885 | if (error) |
886 | return error; | |
887 | ||
c4ed4243 CH |
888 | /* |
889 | * We are going to log the inode size change in this transaction so | |
890 | * any previous writes that are beyond the on disk EOF and the new | |
891 | * EOF that have not been written out need to be written here. If we | |
892 | * do not write the data out, we expose ourselves to the null files | |
5885ebda DC |
893 | * problem. Note that this includes any block zeroing we did above; |
894 | * otherwise those blocks may not be zeroed after a crash. | |
c4ed4243 | 895 | */ |
68a9f5e7 CH |
896 | if (did_zeroing || |
897 | (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { | |
2451337d | 898 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
4bc1ea6b | 899 | ip->i_d.di_size, newsize); |
c4ed4243 | 900 | if (error) |
76ca4c23 | 901 | return error; |
c4ed4243 CH |
902 | } |
903 | ||
49abc3a8 | 904 | /* |
0f9160b4 DC |
905 | * We've already locked out new page faults, so now we can safely remove |
906 | * pages from the page cache knowing they won't get refaulted until we | |
907 | * drop the XFS_MMAP_EXCL lock after the extent manipulations are | |
908 | * complete. The truncate_setsize() call also cleans partial EOF page | |
909 | * PTEs on extending truncates and hence ensures sub-page block size | |
910 | * filesystems are correctly handled, too. | |
49abc3a8 | 911 | * |
0f9160b4 DC |
912 | * We have to do all the page cache truncate work outside the |
913 | * transaction context as the "lock" order is page lock->log space | |
914 | * reservation as defined by extent allocation in the writeback path. | |
253f4911 | 915 | * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but |
0f9160b4 DC |
916 | * having already truncated the in-memory version of the file (i.e. made |
917 | * user visible changes). There's not much we can do about this, except | |
918 | * to hope that the caller sees ENOMEM and retries the truncate | |
919 | * operation. | |
49abc3a8 | 920 | */ |
49abc3a8 | 921 | truncate_setsize(inode, newsize); |
c4ed4243 | 922 | |
253f4911 | 923 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
c4ed4243 | 924 | if (error) |
253f4911 | 925 | return error; |
c4ed4243 | 926 | |
c4ed4243 | 927 | lock_flags |= XFS_ILOCK_EXCL; |
c4ed4243 | 928 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
ddc3415a | 929 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
930 | |
931 | /* | |
932 | * Only change the c/mtime if we are changing the size or we are | |
933 | * explicitly asked to change it. This handles the semantic difference | |
934 | * between truncate() and ftruncate() as implemented in the VFS. | |
935 | * | |
936 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
937 | * special case where we need to update the times despite not having | |
938 | * these flags set. For all other operations the VFS set these flags | |
939 | * explicitly if it wants a timestamp update. | |
940 | */ | |
fe60a8a0 CH |
941 | if (newsize != oldsize && |
942 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 | 943 | iattr->ia_ctime = iattr->ia_mtime = |
c2050a45 | 944 | current_time(inode); |
fe60a8a0 | 945 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
946 | } |
947 | ||
673e8e59 CH |
948 | /* |
949 | * The first thing we do is set the size to new_size permanently on | |
950 | * disk. This way we don't have to worry about anyone ever being able | |
951 | * to look at the data being freed even in the face of a crash. | |
952 | * What we're getting around here is the case where we free a block, it | |
953 | * is allocated to another file, it is written to, and then we crash. | |
954 | * If the new data gets written to the file but the log buffers | |
955 | * containing the free and reallocation don't, then we'd end up with | |
956 | * garbage in the blocks being freed. As long as we make the new size | |
957 | * permanent before actually freeing any blocks it doesn't matter if | |
958 | * they get written to. | |
959 | */ | |
960 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
961 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
962 | ||
963 | if (newsize <= oldsize) { | |
964 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 | 965 | if (error) |
4906e215 | 966 | goto out_trans_cancel; |
c4ed4243 CH |
967 | |
968 | /* | |
969 | * Truncated "down", so we're removing references to old data | |
970 | * here - if we delay flushing for a long time, we expose | |
971 | * ourselves unduly to the notorious NULL files problem. So, | |
972 | * we mark this inode and flush it when the file is closed, | |
973 | * and do not wait the usual (long) time for writeout. | |
974 | */ | |
975 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
976 | |
977 | /* A truncate down always removes post-EOF blocks. */ | |
978 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
979 | } |
980 | ||
fe60a8a0 | 981 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 982 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 983 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 984 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
985 | |
986 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
987 | ||
ff6d6af2 | 988 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
989 | |
990 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
991 | xfs_trans_set_sync(tp); | |
992 | ||
70393313 | 993 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
994 | out_unlock: |
995 | if (lock_flags) | |
996 | xfs_iunlock(ip, lock_flags); | |
997 | return error; | |
998 | ||
c4ed4243 | 999 | out_trans_cancel: |
4906e215 | 1000 | xfs_trans_cancel(tp); |
c4ed4243 CH |
1001 | goto out_unlock; |
1002 | } | |
1003 | ||
69bca807 JK |
1004 | int |
1005 | xfs_vn_setattr_size( | |
1006 | struct dentry *dentry, | |
1007 | struct iattr *iattr) | |
1008 | { | |
1009 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
1010 | int error; | |
1011 | ||
1012 | trace_xfs_setattr(ip); | |
1013 | ||
1014 | error = xfs_vn_change_ok(dentry, iattr); | |
1015 | if (error) | |
1016 | return error; | |
1017 | return xfs_setattr_size(ip, iattr); | |
1018 | } | |
1019 | ||
1da177e4 | 1020 | STATIC int |
416c6d5b | 1021 | xfs_vn_setattr( |
76ca4c23 CH |
1022 | struct dentry *dentry, |
1023 | struct iattr *iattr) | |
1da177e4 | 1024 | { |
76ca4c23 CH |
1025 | int error; |
1026 | ||
1027 | if (iattr->ia_valid & ATTR_SIZE) { | |
69bca807 JK |
1028 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
1029 | uint iolock = XFS_IOLOCK_EXCL; | |
781355c6 | 1030 | |
65523218 CH |
1031 | error = xfs_break_layouts(d_inode(dentry), &iolock); |
1032 | if (error) | |
1033 | return error; | |
e8e9ad42 | 1034 | |
65523218 | 1035 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
0c187dc5 | 1036 | error = xfs_vn_setattr_size(dentry, iattr); |
65523218 | 1037 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); |
76ca4c23 | 1038 | } else { |
69bca807 | 1039 | error = xfs_vn_setattr_nonsize(dentry, iattr); |
76ca4c23 CH |
1040 | } |
1041 | ||
2451337d | 1042 | return error; |
1da177e4 LT |
1043 | } |
1044 | ||
69ff2826 CH |
1045 | STATIC int |
1046 | xfs_vn_update_time( | |
1047 | struct inode *inode, | |
1048 | struct timespec *now, | |
1049 | int flags) | |
1050 | { | |
1051 | struct xfs_inode *ip = XFS_I(inode); | |
1052 | struct xfs_mount *mp = ip->i_mount; | |
1053 | struct xfs_trans *tp; | |
1054 | int error; | |
1055 | ||
1056 | trace_xfs_update_time(ip); | |
1057 | ||
253f4911 CH |
1058 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
1059 | if (error) | |
2451337d | 1060 | return error; |
69ff2826 CH |
1061 | |
1062 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3987848c | 1063 | if (flags & S_CTIME) |
69ff2826 | 1064 | inode->i_ctime = *now; |
3987848c | 1065 | if (flags & S_MTIME) |
69ff2826 | 1066 | inode->i_mtime = *now; |
3987848c | 1067 | if (flags & S_ATIME) |
69ff2826 | 1068 | inode->i_atime = *now; |
3987848c | 1069 | |
69ff2826 CH |
1070 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1071 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); | |
70393313 | 1072 | return xfs_trans_commit(tp); |
69ff2826 CH |
1073 | } |
1074 | ||
f35642e2 ES |
1075 | STATIC int |
1076 | xfs_vn_fiemap( | |
1077 | struct inode *inode, | |
1078 | struct fiemap_extent_info *fieinfo, | |
1079 | u64 start, | |
1080 | u64 length) | |
1081 | { | |
f35642e2 ES |
1082 | int error; |
1083 | ||
d2bb140e | 1084 | xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); |
1d4795e7 CH |
1085 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1086 | fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR; | |
1087 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1088 | &xfs_xattr_iomap_ops); | |
1089 | } else { | |
1090 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1091 | &xfs_iomap_ops); | |
1092 | } | |
d2bb140e | 1093 | xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); |
f35642e2 | 1094 | |
d2bb140e | 1095 | return error; |
f35642e2 ES |
1096 | } |
1097 | ||
99b6436b ZYW |
1098 | STATIC int |
1099 | xfs_vn_tmpfile( | |
1100 | struct inode *dir, | |
1101 | struct dentry *dentry, | |
1102 | umode_t mode) | |
1103 | { | |
d540e43b | 1104 | return xfs_generic_create(dir, dentry, mode, 0, true); |
99b6436b ZYW |
1105 | } |
1106 | ||
41be8bed | 1107 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1108 | .get_acl = xfs_get_acl, |
2401dc29 | 1109 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1110 | .getattr = xfs_vn_getattr, |
1111 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1112 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1113 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1114 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1115 | }; |
1116 | ||
41be8bed | 1117 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1118 | .create = xfs_vn_create, |
1119 | .lookup = xfs_vn_lookup, | |
1120 | .link = xfs_vn_link, | |
1121 | .unlink = xfs_vn_unlink, | |
1122 | .symlink = xfs_vn_symlink, | |
1123 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1124 | /* |
1125 | * Yes, XFS uses the same method for rmdir and unlink. | |
1126 | * | |
1127 | * There are some subtile differences deeper in the code, | |
1128 | * but we use S_ISDIR to check for those. | |
1129 | */ | |
1130 | .rmdir = xfs_vn_unlink, | |
416c6d5b | 1131 | .mknod = xfs_vn_mknod, |
2773bf00 | 1132 | .rename = xfs_vn_rename, |
4e34e719 | 1133 | .get_acl = xfs_get_acl, |
2401dc29 | 1134 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1135 | .getattr = xfs_vn_getattr, |
1136 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1137 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1138 | .update_time = xfs_vn_update_time, |
99b6436b | 1139 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1140 | }; |
1141 | ||
41be8bed | 1142 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1143 | .create = xfs_vn_create, |
1144 | .lookup = xfs_vn_ci_lookup, | |
1145 | .link = xfs_vn_link, | |
1146 | .unlink = xfs_vn_unlink, | |
1147 | .symlink = xfs_vn_symlink, | |
1148 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1149 | /* |
1150 | * Yes, XFS uses the same method for rmdir and unlink. | |
1151 | * | |
1152 | * There are some subtile differences deeper in the code, | |
1153 | * but we use S_ISDIR to check for those. | |
1154 | */ | |
1155 | .rmdir = xfs_vn_unlink, | |
384f3ced | 1156 | .mknod = xfs_vn_mknod, |
2773bf00 | 1157 | .rename = xfs_vn_rename, |
4e34e719 | 1158 | .get_acl = xfs_get_acl, |
2401dc29 | 1159 | .set_acl = xfs_set_acl, |
384f3ced BN |
1160 | .getattr = xfs_vn_getattr, |
1161 | .setattr = xfs_vn_setattr, | |
384f3ced | 1162 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1163 | .update_time = xfs_vn_update_time, |
99b6436b | 1164 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1165 | }; |
1166 | ||
41be8bed | 1167 | static const struct inode_operations xfs_symlink_inode_operations = { |
6b255391 | 1168 | .get_link = xfs_vn_get_link, |
416c6d5b NS |
1169 | .getattr = xfs_vn_getattr, |
1170 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1171 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1172 | .update_time = xfs_vn_update_time, |
1da177e4 | 1173 | }; |
41be8bed | 1174 | |
30ee052e | 1175 | static const struct inode_operations xfs_inline_symlink_inode_operations = { |
30ee052e CH |
1176 | .get_link = xfs_vn_get_link_inline, |
1177 | .getattr = xfs_vn_getattr, | |
1178 | .setattr = xfs_vn_setattr, | |
30ee052e CH |
1179 | .listxattr = xfs_vn_listxattr, |
1180 | .update_time = xfs_vn_update_time, | |
1181 | }; | |
1182 | ||
41be8bed CH |
1183 | STATIC void |
1184 | xfs_diflags_to_iflags( | |
1185 | struct inode *inode, | |
1186 | struct xfs_inode *ip) | |
1187 | { | |
cbe4dab1 DC |
1188 | uint16_t flags = ip->i_d.di_flags; |
1189 | ||
1190 | inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | | |
1191 | S_NOATIME | S_DAX); | |
1192 | ||
1193 | if (flags & XFS_DIFLAG_IMMUTABLE) | |
41be8bed | 1194 | inode->i_flags |= S_IMMUTABLE; |
cbe4dab1 | 1195 | if (flags & XFS_DIFLAG_APPEND) |
41be8bed | 1196 | inode->i_flags |= S_APPEND; |
cbe4dab1 | 1197 | if (flags & XFS_DIFLAG_SYNC) |
41be8bed | 1198 | inode->i_flags |= S_SYNC; |
cbe4dab1 | 1199 | if (flags & XFS_DIFLAG_NOATIME) |
41be8bed | 1200 | inode->i_flags |= S_NOATIME; |
db10c697 | 1201 | if (S_ISREG(inode->i_mode) && |
64485437 | 1202 | ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE && |
4f435ebe | 1203 | !xfs_is_reflink_inode(ip) && |
db10c697 DC |
1204 | (ip->i_mount->m_flags & XFS_MOUNT_DAX || |
1205 | ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) | |
cbe4dab1 | 1206 | inode->i_flags |= S_DAX; |
41be8bed CH |
1207 | } |
1208 | ||
1209 | /* | |
2b3d1d41 | 1210 | * Initialize the Linux inode. |
bf904248 | 1211 | * |
58c90473 DC |
1212 | * When reading existing inodes from disk this is called directly from xfs_iget, |
1213 | * when creating a new inode it is called from xfs_ialloc after setting up the | |
1214 | * inode. These callers have different criteria for clearing XFS_INEW, so leave | |
1215 | * it up to the caller to deal with unlocking the inode appropriately. | |
41be8bed CH |
1216 | */ |
1217 | void | |
1218 | xfs_setup_inode( | |
1219 | struct xfs_inode *ip) | |
1220 | { | |
bf904248 | 1221 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1222 | gfp_t gfp_mask; |
bf904248 DC |
1223 | |
1224 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1225 | inode->i_state = I_NEW; |
646ec461 CH |
1226 | |
1227 | inode_sb_list_add(inode); | |
c6f6cd06 CH |
1228 | /* make the inode look hashed for the writeback code */ |
1229 | hlist_add_fake(&inode->i_hash); | |
41be8bed | 1230 | |
7aab1b28 DE |
1231 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1232 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed CH |
1233 | |
1234 | switch (inode->i_mode & S_IFMT) { | |
1235 | case S_IFBLK: | |
1236 | case S_IFCHR: | |
1237 | inode->i_rdev = | |
1238 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
1239 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
1240 | break; | |
1241 | default: | |
1242 | inode->i_rdev = 0; | |
1243 | break; | |
1244 | } | |
1245 | ||
41be8bed | 1246 | i_size_write(inode, ip->i_d.di_size); |
41be8bed | 1247 | xfs_diflags_to_iflags(inode, ip); |
41be8bed | 1248 | |
2b3d1d41 | 1249 | if (S_ISDIR(inode->i_mode)) { |
93a8614e | 1250 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
32c5483a | 1251 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
2b3d1d41 CH |
1252 | } else { |
1253 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; | |
1254 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); | |
41be8bed CH |
1255 | } |
1256 | ||
ad22c7a0 DC |
1257 | /* |
1258 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1259 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1260 | * stacks or deadlocking. | |
1261 | */ | |
1262 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1263 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1264 | ||
510792ee CH |
1265 | /* |
1266 | * If there is no attribute fork no ACL can exist on this inode, | |
1267 | * and it can't have any file capabilities attached to it either. | |
1268 | */ | |
1269 | if (!XFS_IFORK_Q(ip)) { | |
1270 | inode_has_no_xattr(inode); | |
6311b108 | 1271 | cache_no_acl(inode); |
510792ee | 1272 | } |
41be8bed | 1273 | } |
2b3d1d41 CH |
1274 | |
1275 | void | |
1276 | xfs_setup_iops( | |
1277 | struct xfs_inode *ip) | |
1278 | { | |
1279 | struct inode *inode = &ip->i_vnode; | |
1280 | ||
41be8bed CH |
1281 | switch (inode->i_mode & S_IFMT) { |
1282 | case S_IFREG: | |
1283 | inode->i_op = &xfs_inode_operations; | |
1284 | inode->i_fop = &xfs_file_operations; | |
1285 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1286 | break; | |
1287 | case S_IFDIR: | |
1288 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
1289 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1290 | else | |
1291 | inode->i_op = &xfs_dir_inode_operations; | |
1292 | inode->i_fop = &xfs_dir_file_operations; | |
1293 | break; | |
1294 | case S_IFLNK: | |
30ee052e CH |
1295 | if (ip->i_df.if_flags & XFS_IFINLINE) |
1296 | inode->i_op = &xfs_inline_symlink_inode_operations; | |
1297 | else | |
1298 | inode->i_op = &xfs_symlink_inode_operations; | |
41be8bed CH |
1299 | break; |
1300 | default: | |
1301 | inode->i_op = &xfs_inode_operations; | |
1302 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1303 | break; | |
1304 | } | |
41be8bed | 1305 | } |