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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 | 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; | |
517b5e8c CH |
163 | } else { |
164 | rdev = 0; | |
165 | } | |
1da177e4 | 166 | |
2401dc29 CH |
167 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
168 | if (error) | |
169 | return error; | |
1da177e4 | 170 | |
fab8eef8 AG |
171 | /* Verify mode is valid also for tmpfile case */ |
172 | error = xfs_dentry_mode_to_name(&name, dentry, mode); | |
173 | if (unlikely(error)) | |
174 | goto out_free_acl; | |
175 | ||
d540e43b | 176 | if (!tmpfile) { |
d540e43b BF |
177 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
178 | } else { | |
179 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); | |
180 | } | |
db0bb7ba CH |
181 | if (unlikely(error)) |
182 | goto out_free_acl; | |
446ada4a | 183 | |
01651646 | 184 | inode = VFS_I(ip); |
979ebab1 | 185 | |
2a7dba39 | 186 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
187 | if (unlikely(error)) |
188 | goto out_cleanup_inode; | |
189 | ||
2401dc29 | 190 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 191 | if (default_acl) { |
8ba35875 | 192 | error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
2401dc29 | 193 | if (error) |
db0bb7ba | 194 | goto out_cleanup_inode; |
1da177e4 | 195 | } |
2401dc29 | 196 | if (acl) { |
8ba35875 | 197 | error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
2401dc29 CH |
198 | if (error) |
199 | goto out_cleanup_inode; | |
200 | } | |
201 | #endif | |
1da177e4 | 202 | |
2b3d1d41 CH |
203 | xfs_setup_iops(ip); |
204 | ||
d540e43b BF |
205 | if (tmpfile) |
206 | d_tmpfile(dentry, inode); | |
207 | else | |
208 | d_instantiate(dentry, inode); | |
209 | ||
58c90473 DC |
210 | xfs_finish_inode_setup(ip); |
211 | ||
2401dc29 CH |
212 | out_free_acl: |
213 | if (default_acl) | |
214 | posix_acl_release(default_acl); | |
215 | if (acl) | |
216 | posix_acl_release(acl); | |
2451337d | 217 | return error; |
db0bb7ba CH |
218 | |
219 | out_cleanup_inode: | |
58c90473 | 220 | xfs_finish_inode_setup(ip); |
d540e43b BF |
221 | if (!tmpfile) |
222 | xfs_cleanup_inode(dir, inode, dentry); | |
223 | iput(inode); | |
2401dc29 | 224 | goto out_free_acl; |
1da177e4 LT |
225 | } |
226 | ||
d540e43b BF |
227 | STATIC int |
228 | xfs_vn_mknod( | |
229 | struct inode *dir, | |
230 | struct dentry *dentry, | |
231 | umode_t mode, | |
232 | dev_t rdev) | |
233 | { | |
234 | return xfs_generic_create(dir, dentry, mode, rdev, false); | |
235 | } | |
236 | ||
1da177e4 | 237 | STATIC int |
416c6d5b | 238 | xfs_vn_create( |
1da177e4 LT |
239 | struct inode *dir, |
240 | struct dentry *dentry, | |
4acdaf27 | 241 | umode_t mode, |
ebfc3b49 | 242 | bool flags) |
1da177e4 | 243 | { |
416c6d5b | 244 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
245 | } |
246 | ||
247 | STATIC int | |
416c6d5b | 248 | xfs_vn_mkdir( |
1da177e4 LT |
249 | struct inode *dir, |
250 | struct dentry *dentry, | |
18bb1db3 | 251 | umode_t mode) |
1da177e4 | 252 | { |
416c6d5b | 253 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
254 | } |
255 | ||
256 | STATIC struct dentry * | |
416c6d5b | 257 | xfs_vn_lookup( |
1da177e4 LT |
258 | struct inode *dir, |
259 | struct dentry *dentry, | |
00cd8dd3 | 260 | unsigned int flags) |
1da177e4 | 261 | { |
ef1f5e7a | 262 | struct xfs_inode *cip; |
556b8b16 | 263 | struct xfs_name name; |
1da177e4 LT |
264 | int error; |
265 | ||
266 | if (dentry->d_name.len >= MAXNAMELEN) | |
267 | return ERR_PTR(-ENAMETOOLONG); | |
268 | ||
fab8eef8 | 269 | xfs_dentry_to_name(&name, dentry); |
384f3ced | 270 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 271 | if (unlikely(error)) { |
2451337d DC |
272 | if (unlikely(error != -ENOENT)) |
273 | return ERR_PTR(error); | |
1da177e4 LT |
274 | d_add(dentry, NULL); |
275 | return NULL; | |
276 | } | |
277 | ||
01651646 | 278 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
279 | } |
280 | ||
384f3ced BN |
281 | STATIC struct dentry * |
282 | xfs_vn_ci_lookup( | |
283 | struct inode *dir, | |
284 | struct dentry *dentry, | |
00cd8dd3 | 285 | unsigned int flags) |
384f3ced BN |
286 | { |
287 | struct xfs_inode *ip; | |
288 | struct xfs_name xname; | |
289 | struct xfs_name ci_name; | |
290 | struct qstr dname; | |
291 | int error; | |
292 | ||
293 | if (dentry->d_name.len >= MAXNAMELEN) | |
294 | return ERR_PTR(-ENAMETOOLONG); | |
295 | ||
fab8eef8 | 296 | xfs_dentry_to_name(&xname, dentry); |
384f3ced BN |
297 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
298 | if (unlikely(error)) { | |
2451337d DC |
299 | if (unlikely(error != -ENOENT)) |
300 | return ERR_PTR(error); | |
866d5dc9 BN |
301 | /* |
302 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
303 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
304 | * with CI filesystems). | |
305 | */ | |
384f3ced BN |
306 | return NULL; |
307 | } | |
308 | ||
309 | /* if exact match, just splice and exit */ | |
310 | if (!ci_name.name) | |
01651646 | 311 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
312 | |
313 | /* else case-insensitive match... */ | |
314 | dname.name = ci_name.name; | |
315 | dname.len = ci_name.len; | |
e45b590b | 316 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
317 | kmem_free(ci_name.name); |
318 | return dentry; | |
319 | } | |
320 | ||
1da177e4 | 321 | STATIC int |
416c6d5b | 322 | xfs_vn_link( |
1da177e4 LT |
323 | struct dentry *old_dentry, |
324 | struct inode *dir, | |
325 | struct dentry *dentry) | |
326 | { | |
2b0143b5 | 327 | struct inode *inode = d_inode(old_dentry); |
556b8b16 | 328 | struct xfs_name name; |
1da177e4 LT |
329 | int error; |
330 | ||
fab8eef8 AG |
331 | error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode); |
332 | if (unlikely(error)) | |
333 | return error; | |
1da177e4 | 334 | |
556b8b16 | 335 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 336 | if (unlikely(error)) |
2451337d | 337 | return error; |
a3da7896 | 338 | |
7de9c6ee | 339 | ihold(inode); |
a3da7896 CH |
340 | d_instantiate(dentry, inode); |
341 | return 0; | |
1da177e4 LT |
342 | } |
343 | ||
344 | STATIC int | |
416c6d5b | 345 | xfs_vn_unlink( |
1da177e4 LT |
346 | struct inode *dir, |
347 | struct dentry *dentry) | |
348 | { | |
556b8b16 | 349 | struct xfs_name name; |
1da177e4 LT |
350 | int error; |
351 | ||
fab8eef8 | 352 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 353 | |
2b0143b5 | 354 | error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); |
e5700704 CH |
355 | if (error) |
356 | return error; | |
357 | ||
358 | /* | |
359 | * With unlink, the VFS makes the dentry "negative": no inode, | |
360 | * but still hashed. This is incompatible with case-insensitive | |
361 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
362 | */ | |
363 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
364 | d_invalidate(dentry); | |
365 | return 0; | |
1da177e4 LT |
366 | } |
367 | ||
368 | STATIC int | |
416c6d5b | 369 | xfs_vn_symlink( |
1da177e4 LT |
370 | struct inode *dir, |
371 | struct dentry *dentry, | |
372 | const char *symname) | |
373 | { | |
3937be5b CH |
374 | struct inode *inode; |
375 | struct xfs_inode *cip = NULL; | |
556b8b16 | 376 | struct xfs_name name; |
1da177e4 | 377 | int error; |
576b1d67 | 378 | umode_t mode; |
1da177e4 | 379 | |
3e5daf05 | 380 | mode = S_IFLNK | |
ce3b0f8d | 381 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
fab8eef8 AG |
382 | error = xfs_dentry_mode_to_name(&name, dentry, mode); |
383 | if (unlikely(error)) | |
384 | goto out; | |
1da177e4 | 385 | |
6c77b0ea | 386 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
387 | if (unlikely(error)) |
388 | goto out; | |
389 | ||
01651646 | 390 | inode = VFS_I(cip); |
3937be5b | 391 | |
2a7dba39 | 392 | error = xfs_init_security(inode, dir, &dentry->d_name); |
3937be5b CH |
393 | if (unlikely(error)) |
394 | goto out_cleanup_inode; | |
395 | ||
2b3d1d41 CH |
396 | xfs_setup_iops(cip); |
397 | ||
3937be5b | 398 | d_instantiate(dentry, inode); |
58c90473 | 399 | xfs_finish_inode_setup(cip); |
3937be5b CH |
400 | return 0; |
401 | ||
402 | out_cleanup_inode: | |
58c90473 | 403 | xfs_finish_inode_setup(cip); |
8f112e3b | 404 | xfs_cleanup_inode(dir, inode, dentry); |
d540e43b | 405 | iput(inode); |
3937be5b | 406 | out: |
2451337d | 407 | return error; |
1da177e4 LT |
408 | } |
409 | ||
1da177e4 | 410 | STATIC int |
416c6d5b | 411 | xfs_vn_rename( |
1da177e4 LT |
412 | struct inode *odir, |
413 | struct dentry *odentry, | |
414 | struct inode *ndir, | |
dbe1b5ca CM |
415 | struct dentry *ndentry, |
416 | unsigned int flags) | |
1da177e4 | 417 | { |
2b0143b5 | 418 | struct inode *new_inode = d_inode(ndentry); |
d31a1825 | 419 | int omode = 0; |
fab8eef8 | 420 | int error; |
556b8b16 BN |
421 | struct xfs_name oname; |
422 | struct xfs_name nname; | |
1da177e4 | 423 | |
7dcf5c3e | 424 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
dbe1b5ca CM |
425 | return -EINVAL; |
426 | ||
d31a1825 CM |
427 | /* if we are exchanging files, we need to set i_mode of both files */ |
428 | if (flags & RENAME_EXCHANGE) | |
2b0143b5 | 429 | omode = d_inode(ndentry)->i_mode; |
d31a1825 | 430 | |
fab8eef8 AG |
431 | error = xfs_dentry_mode_to_name(&oname, odentry, omode); |
432 | if (omode && unlikely(error)) | |
433 | return error; | |
434 | ||
435 | error = xfs_dentry_mode_to_name(&nname, ndentry, | |
436 | d_inode(odentry)->i_mode); | |
437 | if (unlikely(error)) | |
438 | return error; | |
556b8b16 | 439 | |
2b0143b5 | 440 | return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)), |
dbe1b5ca | 441 | XFS_I(ndir), &nname, |
d31a1825 | 442 | new_inode ? XFS_I(new_inode) : NULL, flags); |
1da177e4 LT |
443 | } |
444 | ||
445 | /* | |
446 | * careful here - this function can get called recursively, so | |
447 | * we need to be very careful about how much stack we use. | |
448 | * uio is kmalloced for this reason... | |
449 | */ | |
680baacb | 450 | STATIC const char * |
6b255391 | 451 | xfs_vn_get_link( |
1da177e4 | 452 | struct dentry *dentry, |
6b255391 | 453 | struct inode *inode, |
fceef393 | 454 | struct delayed_call *done) |
1da177e4 | 455 | { |
1da177e4 | 456 | char *link; |
804c83c3 | 457 | int error = -ENOMEM; |
1da177e4 | 458 | |
6b255391 AV |
459 | if (!dentry) |
460 | return ERR_PTR(-ECHILD); | |
461 | ||
6eb0b8df | 462 | link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL); |
804c83c3 CH |
463 | if (!link) |
464 | goto out_err; | |
1da177e4 | 465 | |
2b0143b5 | 466 | error = xfs_readlink(XFS_I(d_inode(dentry)), link); |
804c83c3 CH |
467 | if (unlikely(error)) |
468 | goto out_kfree; | |
1da177e4 | 469 | |
fceef393 AV |
470 | set_delayed_call(done, kfree_link, link); |
471 | return link; | |
804c83c3 CH |
472 | |
473 | out_kfree: | |
474 | kfree(link); | |
475 | out_err: | |
680baacb | 476 | return ERR_PTR(error); |
1da177e4 LT |
477 | } |
478 | ||
30ee052e CH |
479 | STATIC const char * |
480 | xfs_vn_get_link_inline( | |
481 | struct dentry *dentry, | |
482 | struct inode *inode, | |
483 | struct delayed_call *done) | |
484 | { | |
485 | ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE); | |
486 | return XFS_I(inode)->i_df.if_u1.if_data; | |
487 | } | |
488 | ||
1da177e4 | 489 | STATIC int |
416c6d5b | 490 | xfs_vn_getattr( |
a528d35e DH |
491 | const struct path *path, |
492 | struct kstat *stat, | |
493 | u32 request_mask, | |
494 | unsigned int query_flags) | |
1da177e4 | 495 | { |
a528d35e | 496 | struct inode *inode = d_inode(path->dentry); |
c43f4087 CH |
497 | struct xfs_inode *ip = XFS_I(inode); |
498 | struct xfs_mount *mp = ip->i_mount; | |
499 | ||
cca28fb8 | 500 | trace_xfs_getattr(ip); |
c43f4087 CH |
501 | |
502 | if (XFS_FORCED_SHUTDOWN(mp)) | |
b474c7ae | 503 | return -EIO; |
c43f4087 CH |
504 | |
505 | stat->size = XFS_ISIZE(ip); | |
506 | stat->dev = inode->i_sb->s_dev; | |
c19b3b05 | 507 | stat->mode = inode->i_mode; |
54d7b5c1 | 508 | stat->nlink = inode->i_nlink; |
7aab1b28 DE |
509 | stat->uid = inode->i_uid; |
510 | stat->gid = inode->i_gid; | |
c43f4087 | 511 | stat->ino = ip->i_ino; |
c43f4087 | 512 | stat->atime = inode->i_atime; |
f9581b14 CH |
513 | stat->mtime = inode->i_mtime; |
514 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
515 | stat->blocks = |
516 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
517 | ||
5f955f26 DW |
518 | if (ip->i_d.di_version == 3) { |
519 | if (request_mask & STATX_BTIME) { | |
520 | stat->result_mask |= STATX_BTIME; | |
521 | stat->btime.tv_sec = ip->i_d.di_crtime.t_sec; | |
522 | stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec; | |
523 | } | |
524 | } | |
525 | ||
526 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
527 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
528 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
529 | stat->attributes |= STATX_ATTR_APPEND; | |
530 | if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP) | |
531 | stat->attributes |= STATX_ATTR_NODUMP; | |
c43f4087 CH |
532 | |
533 | switch (inode->i_mode & S_IFMT) { | |
534 | case S_IFBLK: | |
535 | case S_IFCHR: | |
536 | stat->blksize = BLKDEV_IOSIZE; | |
66f36464 | 537 | stat->rdev = inode->i_rdev; |
c43f4087 CH |
538 | break; |
539 | default: | |
71ddabb9 | 540 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
541 | /* |
542 | * If the file blocks are being allocated from a | |
543 | * realtime volume, then return the inode's realtime | |
544 | * extent size or the realtime volume's extent size. | |
545 | */ | |
546 | stat->blksize = | |
547 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
548 | } else | |
549 | stat->blksize = xfs_preferred_iosize(mp); | |
550 | stat->rdev = 0; | |
551 | break; | |
69e23b9a | 552 | } |
c43f4087 CH |
553 | |
554 | return 0; | |
1da177e4 LT |
555 | } |
556 | ||
56c19e89 DC |
557 | static void |
558 | xfs_setattr_mode( | |
56c19e89 DC |
559 | struct xfs_inode *ip, |
560 | struct iattr *iattr) | |
561 | { | |
0c3d88df CH |
562 | struct inode *inode = VFS_I(ip); |
563 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 564 | |
56c19e89 DC |
565 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
566 | ||
56c19e89 DC |
567 | inode->i_mode &= S_IFMT; |
568 | inode->i_mode |= mode & ~S_IFMT; | |
569 | } | |
570 | ||
52785112 | 571 | void |
c91c46c1 CH |
572 | xfs_setattr_time( |
573 | struct xfs_inode *ip, | |
574 | struct iattr *iattr) | |
575 | { | |
576 | struct inode *inode = VFS_I(ip); | |
577 | ||
578 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
579 | ||
3987848c | 580 | if (iattr->ia_valid & ATTR_ATIME) |
c91c46c1 | 581 | inode->i_atime = iattr->ia_atime; |
3987848c | 582 | if (iattr->ia_valid & ATTR_CTIME) |
c91c46c1 | 583 | inode->i_ctime = iattr->ia_ctime; |
3987848c | 584 | if (iattr->ia_valid & ATTR_MTIME) |
c91c46c1 | 585 | inode->i_mtime = iattr->ia_mtime; |
c91c46c1 CH |
586 | } |
587 | ||
69bca807 JK |
588 | static int |
589 | xfs_vn_change_ok( | |
590 | struct dentry *dentry, | |
591 | struct iattr *iattr) | |
592 | { | |
31051c85 | 593 | struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; |
69bca807 JK |
594 | |
595 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
596 | return -EROFS; | |
597 | ||
598 | if (XFS_FORCED_SHUTDOWN(mp)) | |
599 | return -EIO; | |
600 | ||
31051c85 | 601 | return setattr_prepare(dentry, iattr); |
69bca807 JK |
602 | } |
603 | ||
604 | /* | |
605 | * Set non-size attributes of an inode. | |
606 | * | |
607 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 608 | * setattr_prepare() or otherwise verifying the change is fine. |
69bca807 | 609 | */ |
c4ed4243 CH |
610 | int |
611 | xfs_setattr_nonsize( | |
612 | struct xfs_inode *ip, | |
613 | struct iattr *iattr, | |
614 | int flags) | |
615 | { | |
616 | xfs_mount_t *mp = ip->i_mount; | |
617 | struct inode *inode = VFS_I(ip); | |
618 | int mask = iattr->ia_valid; | |
619 | xfs_trans_t *tp; | |
620 | int error; | |
7aab1b28 DE |
621 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
622 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
623 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
624 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
625 | ||
c4ed4243 CH |
626 | ASSERT((mask & ATTR_SIZE) == 0); |
627 | ||
628 | /* | |
629 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
630 | * before we start any other transactions. Trying to do this later | |
631 | * is messy. We don't care to take a readlock to look at the ids | |
632 | * in inode here, because we can't hold it across the trans_reserve. | |
633 | * If the IDs do change before we take the ilock, we're covered | |
634 | * because the i_*dquot fields will get updated anyway. | |
635 | */ | |
636 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
637 | uint qflags = 0; | |
638 | ||
639 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
640 | uid = iattr->ia_uid; | |
641 | qflags |= XFS_QMOPT_UQUOTA; | |
642 | } else { | |
7aab1b28 | 643 | uid = inode->i_uid; |
c4ed4243 CH |
644 | } |
645 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
646 | gid = iattr->ia_gid; | |
647 | qflags |= XFS_QMOPT_GQUOTA; | |
648 | } else { | |
7aab1b28 | 649 | gid = inode->i_gid; |
c4ed4243 CH |
650 | } |
651 | ||
652 | /* | |
653 | * We take a reference when we initialize udqp and gdqp, | |
654 | * so it is important that we never blindly double trip on | |
655 | * the same variable. See xfs_create() for an example. | |
656 | */ | |
657 | ASSERT(udqp == NULL); | |
658 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
659 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
660 | xfs_kgid_to_gid(gid), | |
661 | xfs_get_projid(ip), | |
662 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
663 | if (error) |
664 | return error; | |
665 | } | |
666 | ||
253f4911 | 667 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
c4ed4243 | 668 | if (error) |
253f4911 | 669 | goto out_dqrele; |
c4ed4243 CH |
670 | |
671 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
253f4911 | 672 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
673 | |
674 | /* | |
675 | * Change file ownership. Must be the owner or privileged. | |
676 | */ | |
677 | if (mask & (ATTR_UID|ATTR_GID)) { | |
678 | /* | |
679 | * These IDs could have changed since we last looked at them. | |
680 | * But, we're assured that if the ownership did change | |
681 | * while we didn't have the inode locked, inode's dquot(s) | |
682 | * would have changed also. | |
683 | */ | |
7aab1b28 DE |
684 | iuid = inode->i_uid; |
685 | igid = inode->i_gid; | |
c4ed4243 CH |
686 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
687 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
688 | ||
689 | /* | |
690 | * Do a quota reservation only if uid/gid is actually | |
691 | * going to change. | |
692 | */ | |
693 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
694 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
695 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
696 | ASSERT(tp); |
697 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 698 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
699 | XFS_QMOPT_FORCE_RES : 0); |
700 | if (error) /* out of quota */ | |
253f4911 | 701 | goto out_cancel; |
c4ed4243 CH |
702 | } |
703 | } | |
704 | ||
c4ed4243 CH |
705 | /* |
706 | * Change file ownership. Must be the owner or privileged. | |
707 | */ | |
708 | if (mask & (ATTR_UID|ATTR_GID)) { | |
709 | /* | |
710 | * CAP_FSETID overrides the following restrictions: | |
711 | * | |
712 | * The set-user-ID and set-group-ID bits of a file will be | |
713 | * cleared upon successful return from chown() | |
714 | */ | |
c19b3b05 | 715 | if ((inode->i_mode & (S_ISUID|S_ISGID)) && |
c4ed4243 | 716 | !capable(CAP_FSETID)) |
c19b3b05 | 717 | inode->i_mode &= ~(S_ISUID|S_ISGID); |
c4ed4243 CH |
718 | |
719 | /* | |
720 | * Change the ownerships and register quota modifications | |
721 | * in the transaction. | |
722 | */ | |
7aab1b28 | 723 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
724 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
725 | ASSERT(mask & ATTR_UID); | |
726 | ASSERT(udqp); | |
727 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
728 | &ip->i_udquot, udqp); | |
729 | } | |
7aab1b28 | 730 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
731 | inode->i_uid = uid; |
732 | } | |
7aab1b28 | 733 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 734 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
735 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
736 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
737 | ASSERT(mask & ATTR_GID); |
738 | ASSERT(gdqp); | |
739 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
740 | &ip->i_gdquot, gdqp); | |
741 | } | |
7aab1b28 | 742 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
743 | inode->i_gid = gid; |
744 | } | |
745 | } | |
746 | ||
56c19e89 | 747 | if (mask & ATTR_MODE) |
0c3d88df | 748 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
749 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
750 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
751 | |
752 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
753 | ||
ff6d6af2 | 754 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
755 | |
756 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
757 | xfs_trans_set_sync(tp); | |
70393313 | 758 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
759 | |
760 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
761 | ||
762 | /* | |
763 | * Release any dquot(s) the inode had kept before chown. | |
764 | */ | |
765 | xfs_qm_dqrele(olddquot1); | |
766 | xfs_qm_dqrele(olddquot2); | |
767 | xfs_qm_dqrele(udqp); | |
768 | xfs_qm_dqrele(gdqp); | |
769 | ||
770 | if (error) | |
b474c7ae | 771 | return error; |
c4ed4243 CH |
772 | |
773 | /* | |
774 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
775 | * update. We could avoid this with linked transactions | |
776 | * and passing down the transaction pointer all the way | |
777 | * to attr_set. No previous user of the generic | |
778 | * Posix ACL code seems to care about this issue either. | |
779 | */ | |
780 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2451337d | 781 | error = posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 | 782 | if (error) |
b474c7ae | 783 | return error; |
c4ed4243 CH |
784 | } |
785 | ||
786 | return 0; | |
787 | ||
253f4911 | 788 | out_cancel: |
4906e215 | 789 | xfs_trans_cancel(tp); |
253f4911 | 790 | out_dqrele: |
c4ed4243 CH |
791 | xfs_qm_dqrele(udqp); |
792 | xfs_qm_dqrele(gdqp); | |
793 | return error; | |
794 | } | |
795 | ||
69bca807 JK |
796 | int |
797 | xfs_vn_setattr_nonsize( | |
798 | struct dentry *dentry, | |
799 | struct iattr *iattr) | |
800 | { | |
801 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
802 | int error; | |
803 | ||
804 | trace_xfs_setattr(ip); | |
805 | ||
806 | error = xfs_vn_change_ok(dentry, iattr); | |
807 | if (error) | |
808 | return error; | |
809 | return xfs_setattr_nonsize(ip, iattr, 0); | |
810 | } | |
811 | ||
c4ed4243 CH |
812 | /* |
813 | * Truncate file. Must have write permission and not be a directory. | |
69bca807 JK |
814 | * |
815 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 816 | * setattr_prepare() or otherwise verifying the change is fine. |
c4ed4243 | 817 | */ |
7bf7a193 | 818 | STATIC int |
c4ed4243 CH |
819 | xfs_setattr_size( |
820 | struct xfs_inode *ip, | |
76ca4c23 | 821 | struct iattr *iattr) |
c4ed4243 CH |
822 | { |
823 | struct xfs_mount *mp = ip->i_mount; | |
824 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 825 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
826 | struct xfs_trans *tp; |
827 | int error; | |
f38996f5 | 828 | uint lock_flags = 0; |
5885ebda | 829 | bool did_zeroing = false; |
c4ed4243 | 830 | |
76ca4c23 | 831 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
e8e9ad42 | 832 | ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); |
c19b3b05 | 833 | ASSERT(S_ISREG(inode->i_mode)); |
fe60a8a0 CH |
834 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
835 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 836 | |
ce7ae151 | 837 | oldsize = inode->i_size; |
673e8e59 CH |
838 | newsize = iattr->ia_size; |
839 | ||
c4ed4243 CH |
840 | /* |
841 | * Short circuit the truncate case for zero length files. | |
842 | */ | |
673e8e59 | 843 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 844 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 845 | return 0; |
681b1200 CH |
846 | |
847 | /* | |
848 | * Use the regular setattr path to update the timestamps. | |
849 | */ | |
681b1200 CH |
850 | iattr->ia_valid &= ~ATTR_SIZE; |
851 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
852 | } |
853 | ||
854 | /* | |
855 | * Make sure that the dquots are attached to the inode. | |
856 | */ | |
f38996f5 | 857 | error = xfs_qm_dqattach(ip, 0); |
c4ed4243 | 858 | if (error) |
76ca4c23 | 859 | return error; |
c4ed4243 | 860 | |
f0c6bcba CH |
861 | /* |
862 | * Wait for all direct I/O to complete. | |
863 | */ | |
864 | inode_dio_wait(inode); | |
865 | ||
c4ed4243 | 866 | /* |
5885ebda DC |
867 | * File data changes must be complete before we start the transaction to |
868 | * modify the inode. This needs to be done before joining the inode to | |
869 | * the transaction because the inode cannot be unlocked once it is a | |
870 | * part of the transaction. | |
871 | * | |
f0c6bcba CH |
872 | * Start with zeroing any data beyond EOF that we may expose on file |
873 | * extension, or zeroing out the rest of the block on a downward | |
874 | * truncate. | |
c4ed4243 | 875 | */ |
673e8e59 | 876 | if (newsize > oldsize) { |
5885ebda | 877 | error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing); |
f0c6bcba | 878 | } else { |
459f0fbc CH |
879 | error = iomap_truncate_page(inode, newsize, &did_zeroing, |
880 | &xfs_iomap_ops); | |
c4ed4243 | 881 | } |
c4ed4243 | 882 | |
f0c6bcba CH |
883 | if (error) |
884 | return error; | |
885 | ||
49abc3a8 | 886 | /* |
0f9160b4 DC |
887 | * We've already locked out new page faults, so now we can safely remove |
888 | * pages from the page cache knowing they won't get refaulted until we | |
889 | * drop the XFS_MMAP_EXCL lock after the extent manipulations are | |
890 | * complete. The truncate_setsize() call also cleans partial EOF page | |
891 | * PTEs on extending truncates and hence ensures sub-page block size | |
892 | * filesystems are correctly handled, too. | |
49abc3a8 | 893 | * |
0f9160b4 DC |
894 | * We have to do all the page cache truncate work outside the |
895 | * transaction context as the "lock" order is page lock->log space | |
896 | * reservation as defined by extent allocation in the writeback path. | |
253f4911 | 897 | * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but |
0f9160b4 DC |
898 | * having already truncated the in-memory version of the file (i.e. made |
899 | * user visible changes). There's not much we can do about this, except | |
900 | * to hope that the caller sees ENOMEM and retries the truncate | |
901 | * operation. | |
350976ae EG |
902 | * |
903 | * And we update in-core i_size and truncate page cache beyond newsize | |
904 | * before writeback the [di_size, newsize] range, so we're guaranteed | |
905 | * not to write stale data past the new EOF on truncate down. | |
49abc3a8 | 906 | */ |
49abc3a8 | 907 | truncate_setsize(inode, newsize); |
c4ed4243 | 908 | |
350976ae EG |
909 | /* |
910 | * We are going to log the inode size change in this transaction so | |
911 | * any previous writes that are beyond the on disk EOF and the new | |
912 | * EOF that have not been written out need to be written here. If we | |
913 | * do not write the data out, we expose ourselves to the null files | |
914 | * problem. Note that this includes any block zeroing we did above; | |
915 | * otherwise those blocks may not be zeroed after a crash. | |
916 | */ | |
917 | if (did_zeroing || | |
918 | (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { | |
919 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, | |
920 | ip->i_d.di_size, newsize - 1); | |
921 | if (error) | |
922 | return error; | |
923 | } | |
924 | ||
253f4911 | 925 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
c4ed4243 | 926 | if (error) |
253f4911 | 927 | return error; |
c4ed4243 | 928 | |
c4ed4243 | 929 | lock_flags |= XFS_ILOCK_EXCL; |
c4ed4243 | 930 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
ddc3415a | 931 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
932 | |
933 | /* | |
934 | * Only change the c/mtime if we are changing the size or we are | |
935 | * explicitly asked to change it. This handles the semantic difference | |
936 | * between truncate() and ftruncate() as implemented in the VFS. | |
937 | * | |
938 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
939 | * special case where we need to update the times despite not having | |
940 | * these flags set. For all other operations the VFS set these flags | |
941 | * explicitly if it wants a timestamp update. | |
942 | */ | |
fe60a8a0 CH |
943 | if (newsize != oldsize && |
944 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 | 945 | iattr->ia_ctime = iattr->ia_mtime = |
c2050a45 | 946 | current_time(inode); |
fe60a8a0 | 947 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
948 | } |
949 | ||
673e8e59 CH |
950 | /* |
951 | * The first thing we do is set the size to new_size permanently on | |
952 | * disk. This way we don't have to worry about anyone ever being able | |
953 | * to look at the data being freed even in the face of a crash. | |
954 | * What we're getting around here is the case where we free a block, it | |
955 | * is allocated to another file, it is written to, and then we crash. | |
956 | * If the new data gets written to the file but the log buffers | |
957 | * containing the free and reallocation don't, then we'd end up with | |
958 | * garbage in the blocks being freed. As long as we make the new size | |
959 | * permanent before actually freeing any blocks it doesn't matter if | |
960 | * they get written to. | |
961 | */ | |
962 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
963 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
964 | ||
965 | if (newsize <= oldsize) { | |
966 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 | 967 | if (error) |
4906e215 | 968 | goto out_trans_cancel; |
c4ed4243 CH |
969 | |
970 | /* | |
971 | * Truncated "down", so we're removing references to old data | |
972 | * here - if we delay flushing for a long time, we expose | |
973 | * ourselves unduly to the notorious NULL files problem. So, | |
974 | * we mark this inode and flush it when the file is closed, | |
975 | * and do not wait the usual (long) time for writeout. | |
976 | */ | |
977 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
978 | |
979 | /* A truncate down always removes post-EOF blocks. */ | |
980 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
981 | } |
982 | ||
fe60a8a0 | 983 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 984 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 985 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 986 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
987 | |
988 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
989 | ||
ff6d6af2 | 990 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
991 | |
992 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
993 | xfs_trans_set_sync(tp); | |
994 | ||
70393313 | 995 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
996 | out_unlock: |
997 | if (lock_flags) | |
998 | xfs_iunlock(ip, lock_flags); | |
999 | return error; | |
1000 | ||
c4ed4243 | 1001 | out_trans_cancel: |
4906e215 | 1002 | xfs_trans_cancel(tp); |
c4ed4243 CH |
1003 | goto out_unlock; |
1004 | } | |
1005 | ||
69bca807 JK |
1006 | int |
1007 | xfs_vn_setattr_size( | |
1008 | struct dentry *dentry, | |
1009 | struct iattr *iattr) | |
1010 | { | |
1011 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
1012 | int error; | |
1013 | ||
1014 | trace_xfs_setattr(ip); | |
1015 | ||
1016 | error = xfs_vn_change_ok(dentry, iattr); | |
1017 | if (error) | |
1018 | return error; | |
1019 | return xfs_setattr_size(ip, iattr); | |
1020 | } | |
1021 | ||
1da177e4 | 1022 | STATIC int |
416c6d5b | 1023 | xfs_vn_setattr( |
76ca4c23 CH |
1024 | struct dentry *dentry, |
1025 | struct iattr *iattr) | |
1da177e4 | 1026 | { |
76ca4c23 CH |
1027 | int error; |
1028 | ||
1029 | if (iattr->ia_valid & ATTR_SIZE) { | |
69bca807 JK |
1030 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
1031 | uint iolock = XFS_IOLOCK_EXCL; | |
781355c6 | 1032 | |
65523218 CH |
1033 | error = xfs_break_layouts(d_inode(dentry), &iolock); |
1034 | if (error) | |
1035 | return error; | |
e8e9ad42 | 1036 | |
65523218 | 1037 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
0c187dc5 | 1038 | error = xfs_vn_setattr_size(dentry, iattr); |
65523218 | 1039 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); |
76ca4c23 | 1040 | } else { |
69bca807 | 1041 | error = xfs_vn_setattr_nonsize(dentry, iattr); |
76ca4c23 CH |
1042 | } |
1043 | ||
2451337d | 1044 | return error; |
1da177e4 LT |
1045 | } |
1046 | ||
69ff2826 CH |
1047 | STATIC int |
1048 | xfs_vn_update_time( | |
1049 | struct inode *inode, | |
1050 | struct timespec *now, | |
1051 | int flags) | |
1052 | { | |
1053 | struct xfs_inode *ip = XFS_I(inode); | |
1054 | struct xfs_mount *mp = ip->i_mount; | |
1055 | struct xfs_trans *tp; | |
1056 | int error; | |
1057 | ||
1058 | trace_xfs_update_time(ip); | |
1059 | ||
253f4911 CH |
1060 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
1061 | if (error) | |
2451337d | 1062 | return error; |
69ff2826 CH |
1063 | |
1064 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3987848c | 1065 | if (flags & S_CTIME) |
69ff2826 | 1066 | inode->i_ctime = *now; |
3987848c | 1067 | if (flags & S_MTIME) |
69ff2826 | 1068 | inode->i_mtime = *now; |
3987848c | 1069 | if (flags & S_ATIME) |
69ff2826 | 1070 | inode->i_atime = *now; |
3987848c | 1071 | |
69ff2826 CH |
1072 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1073 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); | |
70393313 | 1074 | return xfs_trans_commit(tp); |
69ff2826 CH |
1075 | } |
1076 | ||
f35642e2 ES |
1077 | STATIC int |
1078 | xfs_vn_fiemap( | |
1079 | struct inode *inode, | |
1080 | struct fiemap_extent_info *fieinfo, | |
1081 | u64 start, | |
1082 | u64 length) | |
1083 | { | |
f35642e2 ES |
1084 | int error; |
1085 | ||
d2bb140e | 1086 | xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); |
1d4795e7 CH |
1087 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1088 | fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR; | |
1089 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1090 | &xfs_xattr_iomap_ops); | |
1091 | } else { | |
1092 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1093 | &xfs_iomap_ops); | |
1094 | } | |
d2bb140e | 1095 | xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); |
f35642e2 | 1096 | |
d2bb140e | 1097 | return error; |
f35642e2 ES |
1098 | } |
1099 | ||
99b6436b ZYW |
1100 | STATIC int |
1101 | xfs_vn_tmpfile( | |
1102 | struct inode *dir, | |
1103 | struct dentry *dentry, | |
1104 | umode_t mode) | |
1105 | { | |
d540e43b | 1106 | return xfs_generic_create(dir, dentry, mode, 0, true); |
99b6436b ZYW |
1107 | } |
1108 | ||
41be8bed | 1109 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1110 | .get_acl = xfs_get_acl, |
2401dc29 | 1111 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1112 | .getattr = xfs_vn_getattr, |
1113 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1114 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1115 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1116 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1117 | }; |
1118 | ||
41be8bed | 1119 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1120 | .create = xfs_vn_create, |
1121 | .lookup = xfs_vn_lookup, | |
1122 | .link = xfs_vn_link, | |
1123 | .unlink = xfs_vn_unlink, | |
1124 | .symlink = xfs_vn_symlink, | |
1125 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1126 | /* |
1127 | * Yes, XFS uses the same method for rmdir and unlink. | |
1128 | * | |
1129 | * There are some subtile differences deeper in the code, | |
1130 | * but we use S_ISDIR to check for those. | |
1131 | */ | |
1132 | .rmdir = xfs_vn_unlink, | |
416c6d5b | 1133 | .mknod = xfs_vn_mknod, |
2773bf00 | 1134 | .rename = xfs_vn_rename, |
4e34e719 | 1135 | .get_acl = xfs_get_acl, |
2401dc29 | 1136 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1137 | .getattr = xfs_vn_getattr, |
1138 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1139 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1140 | .update_time = xfs_vn_update_time, |
99b6436b | 1141 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1142 | }; |
1143 | ||
41be8bed | 1144 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1145 | .create = xfs_vn_create, |
1146 | .lookup = xfs_vn_ci_lookup, | |
1147 | .link = xfs_vn_link, | |
1148 | .unlink = xfs_vn_unlink, | |
1149 | .symlink = xfs_vn_symlink, | |
1150 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1151 | /* |
1152 | * Yes, XFS uses the same method for rmdir and unlink. | |
1153 | * | |
1154 | * There are some subtile differences deeper in the code, | |
1155 | * but we use S_ISDIR to check for those. | |
1156 | */ | |
1157 | .rmdir = xfs_vn_unlink, | |
384f3ced | 1158 | .mknod = xfs_vn_mknod, |
2773bf00 | 1159 | .rename = xfs_vn_rename, |
4e34e719 | 1160 | .get_acl = xfs_get_acl, |
2401dc29 | 1161 | .set_acl = xfs_set_acl, |
384f3ced BN |
1162 | .getattr = xfs_vn_getattr, |
1163 | .setattr = xfs_vn_setattr, | |
384f3ced | 1164 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1165 | .update_time = xfs_vn_update_time, |
99b6436b | 1166 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1167 | }; |
1168 | ||
41be8bed | 1169 | static const struct inode_operations xfs_symlink_inode_operations = { |
6b255391 | 1170 | .get_link = xfs_vn_get_link, |
416c6d5b NS |
1171 | .getattr = xfs_vn_getattr, |
1172 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1173 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1174 | .update_time = xfs_vn_update_time, |
1da177e4 | 1175 | }; |
41be8bed | 1176 | |
30ee052e | 1177 | static const struct inode_operations xfs_inline_symlink_inode_operations = { |
30ee052e CH |
1178 | .get_link = xfs_vn_get_link_inline, |
1179 | .getattr = xfs_vn_getattr, | |
1180 | .setattr = xfs_vn_setattr, | |
30ee052e CH |
1181 | .listxattr = xfs_vn_listxattr, |
1182 | .update_time = xfs_vn_update_time, | |
1183 | }; | |
1184 | ||
41be8bed CH |
1185 | STATIC void |
1186 | xfs_diflags_to_iflags( | |
1187 | struct inode *inode, | |
1188 | struct xfs_inode *ip) | |
1189 | { | |
cbe4dab1 DC |
1190 | uint16_t flags = ip->i_d.di_flags; |
1191 | ||
1192 | inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | | |
1193 | S_NOATIME | S_DAX); | |
1194 | ||
1195 | if (flags & XFS_DIFLAG_IMMUTABLE) | |
41be8bed | 1196 | inode->i_flags |= S_IMMUTABLE; |
cbe4dab1 | 1197 | if (flags & XFS_DIFLAG_APPEND) |
41be8bed | 1198 | inode->i_flags |= S_APPEND; |
cbe4dab1 | 1199 | if (flags & XFS_DIFLAG_SYNC) |
41be8bed | 1200 | inode->i_flags |= S_SYNC; |
cbe4dab1 | 1201 | if (flags & XFS_DIFLAG_NOATIME) |
41be8bed | 1202 | inode->i_flags |= S_NOATIME; |
db10c697 | 1203 | if (S_ISREG(inode->i_mode) && |
64485437 | 1204 | ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE && |
4f435ebe | 1205 | !xfs_is_reflink_inode(ip) && |
db10c697 DC |
1206 | (ip->i_mount->m_flags & XFS_MOUNT_DAX || |
1207 | ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) | |
cbe4dab1 | 1208 | inode->i_flags |= S_DAX; |
41be8bed CH |
1209 | } |
1210 | ||
1211 | /* | |
2b3d1d41 | 1212 | * Initialize the Linux inode. |
bf904248 | 1213 | * |
58c90473 DC |
1214 | * When reading existing inodes from disk this is called directly from xfs_iget, |
1215 | * when creating a new inode it is called from xfs_ialloc after setting up the | |
1216 | * inode. These callers have different criteria for clearing XFS_INEW, so leave | |
1217 | * it up to the caller to deal with unlocking the inode appropriately. | |
41be8bed CH |
1218 | */ |
1219 | void | |
1220 | xfs_setup_inode( | |
1221 | struct xfs_inode *ip) | |
1222 | { | |
bf904248 | 1223 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1224 | gfp_t gfp_mask; |
bf904248 DC |
1225 | |
1226 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1227 | inode->i_state = I_NEW; |
646ec461 CH |
1228 | |
1229 | inode_sb_list_add(inode); | |
c6f6cd06 CH |
1230 | /* make the inode look hashed for the writeback code */ |
1231 | hlist_add_fake(&inode->i_hash); | |
41be8bed | 1232 | |
7aab1b28 DE |
1233 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1234 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed | 1235 | |
41be8bed | 1236 | i_size_write(inode, ip->i_d.di_size); |
41be8bed | 1237 | xfs_diflags_to_iflags(inode, ip); |
41be8bed | 1238 | |
2b3d1d41 | 1239 | if (S_ISDIR(inode->i_mode)) { |
93a8614e | 1240 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
32c5483a | 1241 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
2b3d1d41 CH |
1242 | } else { |
1243 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; | |
1244 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); | |
41be8bed CH |
1245 | } |
1246 | ||
ad22c7a0 DC |
1247 | /* |
1248 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1249 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1250 | * stacks or deadlocking. | |
1251 | */ | |
1252 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1253 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1254 | ||
510792ee CH |
1255 | /* |
1256 | * If there is no attribute fork no ACL can exist on this inode, | |
1257 | * and it can't have any file capabilities attached to it either. | |
1258 | */ | |
1259 | if (!XFS_IFORK_Q(ip)) { | |
1260 | inode_has_no_xattr(inode); | |
6311b108 | 1261 | cache_no_acl(inode); |
510792ee | 1262 | } |
41be8bed | 1263 | } |
2b3d1d41 CH |
1264 | |
1265 | void | |
1266 | xfs_setup_iops( | |
1267 | struct xfs_inode *ip) | |
1268 | { | |
1269 | struct inode *inode = &ip->i_vnode; | |
1270 | ||
41be8bed CH |
1271 | switch (inode->i_mode & S_IFMT) { |
1272 | case S_IFREG: | |
1273 | inode->i_op = &xfs_inode_operations; | |
1274 | inode->i_fop = &xfs_file_operations; | |
1275 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1276 | break; | |
1277 | case S_IFDIR: | |
1278 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
1279 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1280 | else | |
1281 | inode->i_op = &xfs_dir_inode_operations; | |
1282 | inode->i_fop = &xfs_dir_file_operations; | |
1283 | break; | |
1284 | case S_IFLNK: | |
30ee052e CH |
1285 | if (ip->i_df.if_flags & XFS_IFINLINE) |
1286 | inode->i_op = &xfs_inline_symlink_inode_operations; | |
1287 | else | |
1288 | inode->i_op = &xfs_symlink_inode_operations; | |
41be8bed CH |
1289 | break; |
1290 | default: | |
1291 | inode->i_op = &xfs_inode_operations; | |
1292 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1293 | break; | |
1294 | } | |
41be8bed | 1295 | } |