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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
7b718769 NS |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. | |
1da177e4 | 5 | */ |
1da177e4 LT |
6 | #include "xfs.h" |
7 | #include "xfs_fs.h" | |
70a9883c | 8 | #include "xfs_shared.h" |
239880ef DC |
9 | #include "xfs_format.h" |
10 | #include "xfs_log_format.h" | |
11 | #include "xfs_trans_resv.h" | |
1da177e4 | 12 | #include "xfs_mount.h" |
57062787 | 13 | #include "xfs_da_format.h" |
1da177e4 LT |
14 | #include "xfs_inode.h" |
15 | #include "xfs_bmap.h" | |
68988114 | 16 | #include "xfs_bmap_util.h" |
239880ef | 17 | #include "xfs_acl.h" |
239880ef | 18 | #include "xfs_quota.h" |
1da177e4 | 19 | #include "xfs_error.h" |
1da177e4 | 20 | #include "xfs_attr.h" |
239880ef | 21 | #include "xfs_trans.h" |
0b1b213f | 22 | #include "xfs_trace.h" |
27b52867 | 23 | #include "xfs_icache.h" |
c24b5dfa | 24 | #include "xfs_symlink.h" |
0cb97766 | 25 | #include "xfs_da_btree.h" |
1b767ee3 | 26 | #include "xfs_dir2.h" |
99b6436b | 27 | #include "xfs_trans_space.h" |
68a9f5e7 | 28 | #include "xfs_iomap.h" |
1da177e4 | 29 | |
16f7e0fe | 30 | #include <linux/capability.h> |
1da177e4 | 31 | #include <linux/xattr.h> |
ef14f0c1 | 32 | #include <linux/posix_acl.h> |
446ada4a | 33 | #include <linux/security.h> |
d2bb140e | 34 | #include <linux/iomap.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
c3b1b131 | 36 | #include <linux/iversion.h> |
1da177e4 | 37 | |
93a8614e DC |
38 | /* |
39 | * Directories have different lock order w.r.t. mmap_sem compared to regular | |
40 | * files. This is due to readdir potentially triggering page faults on a user | |
41 | * buffer inside filldir(), and this happens with the ilock on the directory | |
42 | * held. For regular files, the lock order is the other way around - the | |
43 | * mmap_sem is taken during the page fault, and then we lock the ilock to do | |
44 | * block mapping. Hence we need a different class for the directory ilock so | |
45 | * that lockdep can tell them apart. | |
46 | */ | |
47 | static struct lock_class_key xfs_nondir_ilock_class; | |
48 | static struct lock_class_key xfs_dir_ilock_class; | |
49 | ||
8d2a5e6e DC |
50 | static int |
51 | xfs_initxattrs( | |
52 | struct inode *inode, | |
53 | const struct xattr *xattr_array, | |
54 | void *fs_info) | |
9d8f13ba | 55 | { |
8d2a5e6e DC |
56 | const struct xattr *xattr; |
57 | struct xfs_inode *ip = XFS_I(inode); | |
58 | int error = 0; | |
9d8f13ba MZ |
59 | |
60 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
2451337d | 61 | error = xfs_attr_set(ip, xattr->name, xattr->value, |
a5a14de2 | 62 | xattr->value_len, ATTR_SECURE); |
9d8f13ba MZ |
63 | if (error < 0) |
64 | break; | |
65 | } | |
66 | return error; | |
67 | } | |
68 | ||
446ada4a NS |
69 | /* |
70 | * Hook in SELinux. This is not quite correct yet, what we really need | |
71 | * here (as we do for default ACLs) is a mechanism by which creation of | |
72 | * these attrs can be journalled at inode creation time (along with the | |
73 | * inode, of course, such that log replay can't cause these to be lost). | |
74 | */ | |
9d8f13ba | 75 | |
446ada4a | 76 | STATIC int |
416c6d5b | 77 | xfs_init_security( |
af048193 | 78 | struct inode *inode, |
2a7dba39 EP |
79 | struct inode *dir, |
80 | const struct qstr *qstr) | |
446ada4a | 81 | { |
2451337d | 82 | return security_inode_init_security(inode, dir, qstr, |
a5a14de2 | 83 | &xfs_initxattrs, NULL); |
446ada4a NS |
84 | } |
85 | ||
556b8b16 BN |
86 | static void |
87 | xfs_dentry_to_name( | |
fab8eef8 AG |
88 | struct xfs_name *namep, |
89 | struct dentry *dentry) | |
90 | { | |
91 | namep->name = dentry->d_name.name; | |
92 | namep->len = dentry->d_name.len; | |
93 | namep->type = XFS_DIR3_FT_UNKNOWN; | |
94 | } | |
95 | ||
96 | static int | |
97 | xfs_dentry_mode_to_name( | |
556b8b16 | 98 | struct xfs_name *namep, |
0cb97766 DC |
99 | struct dentry *dentry, |
100 | int mode) | |
556b8b16 BN |
101 | { |
102 | namep->name = dentry->d_name.name; | |
103 | namep->len = dentry->d_name.len; | |
1fc4d33f | 104 | namep->type = xfs_mode_to_ftype(mode); |
fab8eef8 AG |
105 | |
106 | if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN)) | |
107 | return -EFSCORRUPTED; | |
108 | ||
109 | return 0; | |
556b8b16 BN |
110 | } |
111 | ||
7989cb8e | 112 | STATIC void |
416c6d5b | 113 | xfs_cleanup_inode( |
739bfb2a | 114 | struct inode *dir, |
af048193 | 115 | struct inode *inode, |
8f112e3b | 116 | struct dentry *dentry) |
3a69c7dc | 117 | { |
556b8b16 | 118 | struct xfs_name teardown; |
3a69c7dc YL |
119 | |
120 | /* Oh, the horror. | |
220b5284 | 121 | * If we can't add the ACL or we fail in |
416c6d5b | 122 | * xfs_init_security we must back out. |
3a69c7dc YL |
123 | * ENOSPC can hit here, among other things. |
124 | */ | |
fab8eef8 | 125 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc | 126 | |
8f112e3b | 127 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
3a69c7dc YL |
128 | } |
129 | ||
1da177e4 | 130 | STATIC int |
d540e43b | 131 | xfs_generic_create( |
1da177e4 LT |
132 | struct inode *dir, |
133 | struct dentry *dentry, | |
1a67aafb | 134 | umode_t mode, |
d540e43b BF |
135 | dev_t rdev, |
136 | bool tmpfile) /* unnamed file */ | |
1da177e4 | 137 | { |
db0bb7ba | 138 | struct inode *inode; |
979ebab1 | 139 | struct xfs_inode *ip = NULL; |
2401dc29 | 140 | struct posix_acl *default_acl, *acl; |
556b8b16 | 141 | struct xfs_name name; |
1da177e4 LT |
142 | int error; |
143 | ||
144 | /* | |
145 | * Irix uses Missed'em'V split, but doesn't want to see | |
146 | * the upper 5 bits of (14bit) major. | |
147 | */ | |
517b5e8c CH |
148 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
149 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
150 | return -EINVAL; | |
517b5e8c CH |
151 | } else { |
152 | rdev = 0; | |
153 | } | |
1da177e4 | 154 | |
2401dc29 CH |
155 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
156 | if (error) | |
157 | return error; | |
1da177e4 | 158 | |
fab8eef8 AG |
159 | /* Verify mode is valid also for tmpfile case */ |
160 | error = xfs_dentry_mode_to_name(&name, dentry, mode); | |
161 | if (unlikely(error)) | |
162 | goto out_free_acl; | |
163 | ||
d540e43b | 164 | if (!tmpfile) { |
d540e43b BF |
165 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
166 | } else { | |
a1f69417 | 167 | error = xfs_create_tmpfile(XFS_I(dir), mode, &ip); |
d540e43b | 168 | } |
db0bb7ba CH |
169 | if (unlikely(error)) |
170 | goto out_free_acl; | |
446ada4a | 171 | |
01651646 | 172 | inode = VFS_I(ip); |
979ebab1 | 173 | |
2a7dba39 | 174 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
175 | if (unlikely(error)) |
176 | goto out_cleanup_inode; | |
177 | ||
2401dc29 | 178 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 179 | if (default_acl) { |
8ba35875 | 180 | error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
2401dc29 | 181 | if (error) |
db0bb7ba | 182 | goto out_cleanup_inode; |
1da177e4 | 183 | } |
2401dc29 | 184 | if (acl) { |
8ba35875 | 185 | error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
2401dc29 CH |
186 | if (error) |
187 | goto out_cleanup_inode; | |
188 | } | |
189 | #endif | |
1da177e4 | 190 | |
2b3d1d41 CH |
191 | xfs_setup_iops(ip); |
192 | ||
d540e43b BF |
193 | if (tmpfile) |
194 | d_tmpfile(dentry, inode); | |
195 | else | |
196 | d_instantiate(dentry, inode); | |
197 | ||
58c90473 DC |
198 | xfs_finish_inode_setup(ip); |
199 | ||
2401dc29 CH |
200 | out_free_acl: |
201 | if (default_acl) | |
202 | posix_acl_release(default_acl); | |
203 | if (acl) | |
204 | posix_acl_release(acl); | |
2451337d | 205 | return error; |
db0bb7ba CH |
206 | |
207 | out_cleanup_inode: | |
58c90473 | 208 | xfs_finish_inode_setup(ip); |
d540e43b BF |
209 | if (!tmpfile) |
210 | xfs_cleanup_inode(dir, inode, dentry); | |
211 | iput(inode); | |
2401dc29 | 212 | goto out_free_acl; |
1da177e4 LT |
213 | } |
214 | ||
d540e43b BF |
215 | STATIC int |
216 | xfs_vn_mknod( | |
217 | struct inode *dir, | |
218 | struct dentry *dentry, | |
219 | umode_t mode, | |
220 | dev_t rdev) | |
221 | { | |
222 | return xfs_generic_create(dir, dentry, mode, rdev, false); | |
223 | } | |
224 | ||
1da177e4 | 225 | STATIC int |
416c6d5b | 226 | xfs_vn_create( |
1da177e4 LT |
227 | struct inode *dir, |
228 | struct dentry *dentry, | |
4acdaf27 | 229 | umode_t mode, |
ebfc3b49 | 230 | bool flags) |
1da177e4 | 231 | { |
416c6d5b | 232 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
233 | } |
234 | ||
235 | STATIC int | |
416c6d5b | 236 | xfs_vn_mkdir( |
1da177e4 LT |
237 | struct inode *dir, |
238 | struct dentry *dentry, | |
18bb1db3 | 239 | umode_t mode) |
1da177e4 | 240 | { |
416c6d5b | 241 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
242 | } |
243 | ||
244 | STATIC struct dentry * | |
416c6d5b | 245 | xfs_vn_lookup( |
1da177e4 LT |
246 | struct inode *dir, |
247 | struct dentry *dentry, | |
00cd8dd3 | 248 | unsigned int flags) |
1da177e4 | 249 | { |
b113a6d3 | 250 | struct inode *inode; |
ef1f5e7a | 251 | struct xfs_inode *cip; |
556b8b16 | 252 | struct xfs_name name; |
1da177e4 LT |
253 | int error; |
254 | ||
255 | if (dentry->d_name.len >= MAXNAMELEN) | |
256 | return ERR_PTR(-ENAMETOOLONG); | |
257 | ||
fab8eef8 | 258 | xfs_dentry_to_name(&name, dentry); |
384f3ced | 259 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
b113a6d3 AV |
260 | if (likely(!error)) |
261 | inode = VFS_I(cip); | |
262 | else if (likely(error == -ENOENT)) | |
263 | inode = NULL; | |
264 | else | |
265 | inode = ERR_PTR(error); | |
266 | return d_splice_alias(inode, dentry); | |
1da177e4 LT |
267 | } |
268 | ||
384f3ced BN |
269 | STATIC struct dentry * |
270 | xfs_vn_ci_lookup( | |
271 | struct inode *dir, | |
272 | struct dentry *dentry, | |
00cd8dd3 | 273 | unsigned int flags) |
384f3ced BN |
274 | { |
275 | struct xfs_inode *ip; | |
276 | struct xfs_name xname; | |
277 | struct xfs_name ci_name; | |
278 | struct qstr dname; | |
279 | int error; | |
280 | ||
281 | if (dentry->d_name.len >= MAXNAMELEN) | |
282 | return ERR_PTR(-ENAMETOOLONG); | |
283 | ||
fab8eef8 | 284 | xfs_dentry_to_name(&xname, dentry); |
384f3ced BN |
285 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
286 | if (unlikely(error)) { | |
2451337d DC |
287 | if (unlikely(error != -ENOENT)) |
288 | return ERR_PTR(error); | |
866d5dc9 BN |
289 | /* |
290 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
291 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
292 | * with CI filesystems). | |
293 | */ | |
384f3ced BN |
294 | return NULL; |
295 | } | |
296 | ||
297 | /* if exact match, just splice and exit */ | |
298 | if (!ci_name.name) | |
01651646 | 299 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
300 | |
301 | /* else case-insensitive match... */ | |
302 | dname.name = ci_name.name; | |
303 | dname.len = ci_name.len; | |
e45b590b | 304 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
305 | kmem_free(ci_name.name); |
306 | return dentry; | |
307 | } | |
308 | ||
1da177e4 | 309 | STATIC int |
416c6d5b | 310 | xfs_vn_link( |
1da177e4 LT |
311 | struct dentry *old_dentry, |
312 | struct inode *dir, | |
313 | struct dentry *dentry) | |
314 | { | |
2b0143b5 | 315 | struct inode *inode = d_inode(old_dentry); |
556b8b16 | 316 | struct xfs_name name; |
1da177e4 LT |
317 | int error; |
318 | ||
fab8eef8 AG |
319 | error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode); |
320 | if (unlikely(error)) | |
321 | return error; | |
1da177e4 | 322 | |
556b8b16 | 323 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 324 | if (unlikely(error)) |
2451337d | 325 | return error; |
a3da7896 | 326 | |
7de9c6ee | 327 | ihold(inode); |
a3da7896 CH |
328 | d_instantiate(dentry, inode); |
329 | return 0; | |
1da177e4 LT |
330 | } |
331 | ||
332 | STATIC int | |
416c6d5b | 333 | xfs_vn_unlink( |
1da177e4 LT |
334 | struct inode *dir, |
335 | struct dentry *dentry) | |
336 | { | |
556b8b16 | 337 | struct xfs_name name; |
1da177e4 LT |
338 | int error; |
339 | ||
fab8eef8 | 340 | xfs_dentry_to_name(&name, dentry); |
1da177e4 | 341 | |
2b0143b5 | 342 | error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); |
e5700704 CH |
343 | if (error) |
344 | return error; | |
345 | ||
346 | /* | |
347 | * With unlink, the VFS makes the dentry "negative": no inode, | |
348 | * but still hashed. This is incompatible with case-insensitive | |
349 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
350 | */ | |
351 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
352 | d_invalidate(dentry); | |
353 | return 0; | |
1da177e4 LT |
354 | } |
355 | ||
356 | STATIC int | |
416c6d5b | 357 | xfs_vn_symlink( |
1da177e4 LT |
358 | struct inode *dir, |
359 | struct dentry *dentry, | |
360 | const char *symname) | |
361 | { | |
3937be5b CH |
362 | struct inode *inode; |
363 | struct xfs_inode *cip = NULL; | |
556b8b16 | 364 | struct xfs_name name; |
1da177e4 | 365 | int error; |
576b1d67 | 366 | umode_t mode; |
1da177e4 | 367 | |
3e5daf05 | 368 | mode = S_IFLNK | |
ce3b0f8d | 369 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
fab8eef8 AG |
370 | error = xfs_dentry_mode_to_name(&name, dentry, mode); |
371 | if (unlikely(error)) | |
372 | goto out; | |
1da177e4 | 373 | |
6c77b0ea | 374 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
375 | if (unlikely(error)) |
376 | goto out; | |
377 | ||
01651646 | 378 | inode = VFS_I(cip); |
3937be5b | 379 | |
2a7dba39 | 380 | error = xfs_init_security(inode, dir, &dentry->d_name); |
3937be5b CH |
381 | if (unlikely(error)) |
382 | goto out_cleanup_inode; | |
383 | ||
2b3d1d41 CH |
384 | xfs_setup_iops(cip); |
385 | ||
3937be5b | 386 | d_instantiate(dentry, inode); |
58c90473 | 387 | xfs_finish_inode_setup(cip); |
3937be5b CH |
388 | return 0; |
389 | ||
390 | out_cleanup_inode: | |
58c90473 | 391 | xfs_finish_inode_setup(cip); |
8f112e3b | 392 | xfs_cleanup_inode(dir, inode, dentry); |
d540e43b | 393 | iput(inode); |
3937be5b | 394 | out: |
2451337d | 395 | return error; |
1da177e4 LT |
396 | } |
397 | ||
1da177e4 | 398 | STATIC int |
416c6d5b | 399 | xfs_vn_rename( |
1da177e4 LT |
400 | struct inode *odir, |
401 | struct dentry *odentry, | |
402 | struct inode *ndir, | |
dbe1b5ca CM |
403 | struct dentry *ndentry, |
404 | unsigned int flags) | |
1da177e4 | 405 | { |
2b0143b5 | 406 | struct inode *new_inode = d_inode(ndentry); |
d31a1825 | 407 | int omode = 0; |
fab8eef8 | 408 | int error; |
556b8b16 BN |
409 | struct xfs_name oname; |
410 | struct xfs_name nname; | |
1da177e4 | 411 | |
7dcf5c3e | 412 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
dbe1b5ca CM |
413 | return -EINVAL; |
414 | ||
d31a1825 CM |
415 | /* if we are exchanging files, we need to set i_mode of both files */ |
416 | if (flags & RENAME_EXCHANGE) | |
2b0143b5 | 417 | omode = d_inode(ndentry)->i_mode; |
d31a1825 | 418 | |
fab8eef8 AG |
419 | error = xfs_dentry_mode_to_name(&oname, odentry, omode); |
420 | if (omode && unlikely(error)) | |
421 | return error; | |
422 | ||
423 | error = xfs_dentry_mode_to_name(&nname, ndentry, | |
424 | d_inode(odentry)->i_mode); | |
425 | if (unlikely(error)) | |
426 | return error; | |
556b8b16 | 427 | |
2b0143b5 | 428 | return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)), |
dbe1b5ca | 429 | XFS_I(ndir), &nname, |
d31a1825 | 430 | new_inode ? XFS_I(new_inode) : NULL, flags); |
1da177e4 LT |
431 | } |
432 | ||
433 | /* | |
434 | * careful here - this function can get called recursively, so | |
435 | * we need to be very careful about how much stack we use. | |
436 | * uio is kmalloced for this reason... | |
437 | */ | |
680baacb | 438 | STATIC const char * |
6b255391 | 439 | xfs_vn_get_link( |
1da177e4 | 440 | struct dentry *dentry, |
6b255391 | 441 | struct inode *inode, |
fceef393 | 442 | struct delayed_call *done) |
1da177e4 | 443 | { |
1da177e4 | 444 | char *link; |
804c83c3 | 445 | int error = -ENOMEM; |
1da177e4 | 446 | |
6b255391 AV |
447 | if (!dentry) |
448 | return ERR_PTR(-ECHILD); | |
449 | ||
6eb0b8df | 450 | link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL); |
804c83c3 CH |
451 | if (!link) |
452 | goto out_err; | |
1da177e4 | 453 | |
2b0143b5 | 454 | error = xfs_readlink(XFS_I(d_inode(dentry)), link); |
804c83c3 CH |
455 | if (unlikely(error)) |
456 | goto out_kfree; | |
1da177e4 | 457 | |
fceef393 AV |
458 | set_delayed_call(done, kfree_link, link); |
459 | return link; | |
804c83c3 CH |
460 | |
461 | out_kfree: | |
462 | kfree(link); | |
463 | out_err: | |
680baacb | 464 | return ERR_PTR(error); |
1da177e4 LT |
465 | } |
466 | ||
30ee052e CH |
467 | STATIC const char * |
468 | xfs_vn_get_link_inline( | |
469 | struct dentry *dentry, | |
470 | struct inode *inode, | |
471 | struct delayed_call *done) | |
472 | { | |
473 | ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE); | |
474 | return XFS_I(inode)->i_df.if_u1.if_data; | |
475 | } | |
476 | ||
1da177e4 | 477 | STATIC int |
416c6d5b | 478 | xfs_vn_getattr( |
a528d35e DH |
479 | const struct path *path, |
480 | struct kstat *stat, | |
481 | u32 request_mask, | |
482 | unsigned int query_flags) | |
1da177e4 | 483 | { |
a528d35e | 484 | struct inode *inode = d_inode(path->dentry); |
c43f4087 CH |
485 | struct xfs_inode *ip = XFS_I(inode); |
486 | struct xfs_mount *mp = ip->i_mount; | |
487 | ||
cca28fb8 | 488 | trace_xfs_getattr(ip); |
c43f4087 CH |
489 | |
490 | if (XFS_FORCED_SHUTDOWN(mp)) | |
b474c7ae | 491 | return -EIO; |
c43f4087 CH |
492 | |
493 | stat->size = XFS_ISIZE(ip); | |
494 | stat->dev = inode->i_sb->s_dev; | |
c19b3b05 | 495 | stat->mode = inode->i_mode; |
54d7b5c1 | 496 | stat->nlink = inode->i_nlink; |
7aab1b28 DE |
497 | stat->uid = inode->i_uid; |
498 | stat->gid = inode->i_gid; | |
c43f4087 | 499 | stat->ino = ip->i_ino; |
c43f4087 | 500 | stat->atime = inode->i_atime; |
f9581b14 CH |
501 | stat->mtime = inode->i_mtime; |
502 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
503 | stat->blocks = |
504 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
505 | ||
5f955f26 DW |
506 | if (ip->i_d.di_version == 3) { |
507 | if (request_mask & STATX_BTIME) { | |
508 | stat->result_mask |= STATX_BTIME; | |
509 | stat->btime.tv_sec = ip->i_d.di_crtime.t_sec; | |
510 | stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec; | |
511 | } | |
512 | } | |
513 | ||
514 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
515 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
516 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
517 | stat->attributes |= STATX_ATTR_APPEND; | |
518 | if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP) | |
519 | stat->attributes |= STATX_ATTR_NODUMP; | |
c43f4087 CH |
520 | |
521 | switch (inode->i_mode & S_IFMT) { | |
522 | case S_IFBLK: | |
523 | case S_IFCHR: | |
524 | stat->blksize = BLKDEV_IOSIZE; | |
66f36464 | 525 | stat->rdev = inode->i_rdev; |
c43f4087 CH |
526 | break; |
527 | default: | |
71ddabb9 | 528 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
529 | /* |
530 | * If the file blocks are being allocated from a | |
531 | * realtime volume, then return the inode's realtime | |
532 | * extent size or the realtime volume's extent size. | |
533 | */ | |
534 | stat->blksize = | |
535 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
536 | } else | |
537 | stat->blksize = xfs_preferred_iosize(mp); | |
538 | stat->rdev = 0; | |
539 | break; | |
69e23b9a | 540 | } |
c43f4087 CH |
541 | |
542 | return 0; | |
1da177e4 LT |
543 | } |
544 | ||
56c19e89 DC |
545 | static void |
546 | xfs_setattr_mode( | |
56c19e89 DC |
547 | struct xfs_inode *ip, |
548 | struct iattr *iattr) | |
549 | { | |
0c3d88df CH |
550 | struct inode *inode = VFS_I(ip); |
551 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 552 | |
56c19e89 DC |
553 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
554 | ||
56c19e89 DC |
555 | inode->i_mode &= S_IFMT; |
556 | inode->i_mode |= mode & ~S_IFMT; | |
557 | } | |
558 | ||
52785112 | 559 | void |
c91c46c1 CH |
560 | xfs_setattr_time( |
561 | struct xfs_inode *ip, | |
562 | struct iattr *iattr) | |
563 | { | |
564 | struct inode *inode = VFS_I(ip); | |
565 | ||
566 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
567 | ||
3987848c | 568 | if (iattr->ia_valid & ATTR_ATIME) |
c91c46c1 | 569 | inode->i_atime = iattr->ia_atime; |
3987848c | 570 | if (iattr->ia_valid & ATTR_CTIME) |
c91c46c1 | 571 | inode->i_ctime = iattr->ia_ctime; |
3987848c | 572 | if (iattr->ia_valid & ATTR_MTIME) |
c91c46c1 | 573 | inode->i_mtime = iattr->ia_mtime; |
c91c46c1 CH |
574 | } |
575 | ||
69bca807 JK |
576 | static int |
577 | xfs_vn_change_ok( | |
578 | struct dentry *dentry, | |
579 | struct iattr *iattr) | |
580 | { | |
31051c85 | 581 | struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; |
69bca807 JK |
582 | |
583 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
584 | return -EROFS; | |
585 | ||
586 | if (XFS_FORCED_SHUTDOWN(mp)) | |
587 | return -EIO; | |
588 | ||
31051c85 | 589 | return setattr_prepare(dentry, iattr); |
69bca807 JK |
590 | } |
591 | ||
592 | /* | |
593 | * Set non-size attributes of an inode. | |
594 | * | |
595 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 596 | * setattr_prepare() or otherwise verifying the change is fine. |
69bca807 | 597 | */ |
c4ed4243 CH |
598 | int |
599 | xfs_setattr_nonsize( | |
600 | struct xfs_inode *ip, | |
601 | struct iattr *iattr, | |
602 | int flags) | |
603 | { | |
604 | xfs_mount_t *mp = ip->i_mount; | |
605 | struct inode *inode = VFS_I(ip); | |
606 | int mask = iattr->ia_valid; | |
607 | xfs_trans_t *tp; | |
608 | int error; | |
7aab1b28 DE |
609 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
610 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
611 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
612 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
613 | ||
c4ed4243 CH |
614 | ASSERT((mask & ATTR_SIZE) == 0); |
615 | ||
616 | /* | |
617 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
618 | * before we start any other transactions. Trying to do this later | |
619 | * is messy. We don't care to take a readlock to look at the ids | |
620 | * in inode here, because we can't hold it across the trans_reserve. | |
621 | * If the IDs do change before we take the ilock, we're covered | |
622 | * because the i_*dquot fields will get updated anyway. | |
623 | */ | |
624 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
625 | uint qflags = 0; | |
626 | ||
627 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
628 | uid = iattr->ia_uid; | |
629 | qflags |= XFS_QMOPT_UQUOTA; | |
630 | } else { | |
7aab1b28 | 631 | uid = inode->i_uid; |
c4ed4243 CH |
632 | } |
633 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
634 | gid = iattr->ia_gid; | |
635 | qflags |= XFS_QMOPT_GQUOTA; | |
636 | } else { | |
7aab1b28 | 637 | gid = inode->i_gid; |
c4ed4243 CH |
638 | } |
639 | ||
640 | /* | |
641 | * We take a reference when we initialize udqp and gdqp, | |
642 | * so it is important that we never blindly double trip on | |
643 | * the same variable. See xfs_create() for an example. | |
644 | */ | |
645 | ASSERT(udqp == NULL); | |
646 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
647 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
648 | xfs_kgid_to_gid(gid), | |
649 | xfs_get_projid(ip), | |
650 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
651 | if (error) |
652 | return error; | |
653 | } | |
654 | ||
253f4911 | 655 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
c4ed4243 | 656 | if (error) |
253f4911 | 657 | goto out_dqrele; |
c4ed4243 CH |
658 | |
659 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
253f4911 | 660 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
661 | |
662 | /* | |
663 | * Change file ownership. Must be the owner or privileged. | |
664 | */ | |
665 | if (mask & (ATTR_UID|ATTR_GID)) { | |
666 | /* | |
667 | * These IDs could have changed since we last looked at them. | |
668 | * But, we're assured that if the ownership did change | |
669 | * while we didn't have the inode locked, inode's dquot(s) | |
670 | * would have changed also. | |
671 | */ | |
7aab1b28 DE |
672 | iuid = inode->i_uid; |
673 | igid = inode->i_gid; | |
c4ed4243 CH |
674 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
675 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
676 | ||
677 | /* | |
678 | * Do a quota reservation only if uid/gid is actually | |
679 | * going to change. | |
680 | */ | |
681 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
682 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
683 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
684 | ASSERT(tp); |
685 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 686 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
687 | XFS_QMOPT_FORCE_RES : 0); |
688 | if (error) /* out of quota */ | |
253f4911 | 689 | goto out_cancel; |
c4ed4243 CH |
690 | } |
691 | } | |
692 | ||
c4ed4243 CH |
693 | /* |
694 | * Change file ownership. Must be the owner or privileged. | |
695 | */ | |
696 | if (mask & (ATTR_UID|ATTR_GID)) { | |
697 | /* | |
698 | * CAP_FSETID overrides the following restrictions: | |
699 | * | |
700 | * The set-user-ID and set-group-ID bits of a file will be | |
701 | * cleared upon successful return from chown() | |
702 | */ | |
c19b3b05 | 703 | if ((inode->i_mode & (S_ISUID|S_ISGID)) && |
c4ed4243 | 704 | !capable(CAP_FSETID)) |
c19b3b05 | 705 | inode->i_mode &= ~(S_ISUID|S_ISGID); |
c4ed4243 CH |
706 | |
707 | /* | |
708 | * Change the ownerships and register quota modifications | |
709 | * in the transaction. | |
710 | */ | |
7aab1b28 | 711 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
712 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
713 | ASSERT(mask & ATTR_UID); | |
714 | ASSERT(udqp); | |
715 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
716 | &ip->i_udquot, udqp); | |
717 | } | |
7aab1b28 | 718 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
719 | inode->i_uid = uid; |
720 | } | |
7aab1b28 | 721 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 722 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
723 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
724 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
725 | ASSERT(mask & ATTR_GID); |
726 | ASSERT(gdqp); | |
727 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
728 | &ip->i_gdquot, gdqp); | |
729 | } | |
7aab1b28 | 730 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
731 | inode->i_gid = gid; |
732 | } | |
733 | } | |
734 | ||
56c19e89 | 735 | if (mask & ATTR_MODE) |
0c3d88df | 736 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
737 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
738 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
739 | |
740 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
741 | ||
ff6d6af2 | 742 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
743 | |
744 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
745 | xfs_trans_set_sync(tp); | |
70393313 | 746 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
747 | |
748 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
749 | ||
750 | /* | |
751 | * Release any dquot(s) the inode had kept before chown. | |
752 | */ | |
753 | xfs_qm_dqrele(olddquot1); | |
754 | xfs_qm_dqrele(olddquot2); | |
755 | xfs_qm_dqrele(udqp); | |
756 | xfs_qm_dqrele(gdqp); | |
757 | ||
758 | if (error) | |
b474c7ae | 759 | return error; |
c4ed4243 CH |
760 | |
761 | /* | |
762 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
763 | * update. We could avoid this with linked transactions | |
764 | * and passing down the transaction pointer all the way | |
765 | * to attr_set. No previous user of the generic | |
766 | * Posix ACL code seems to care about this issue either. | |
767 | */ | |
768 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2451337d | 769 | error = posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 | 770 | if (error) |
b474c7ae | 771 | return error; |
c4ed4243 CH |
772 | } |
773 | ||
774 | return 0; | |
775 | ||
253f4911 | 776 | out_cancel: |
4906e215 | 777 | xfs_trans_cancel(tp); |
253f4911 | 778 | out_dqrele: |
c4ed4243 CH |
779 | xfs_qm_dqrele(udqp); |
780 | xfs_qm_dqrele(gdqp); | |
781 | return error; | |
782 | } | |
783 | ||
69bca807 JK |
784 | int |
785 | xfs_vn_setattr_nonsize( | |
786 | struct dentry *dentry, | |
787 | struct iattr *iattr) | |
788 | { | |
789 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
790 | int error; | |
791 | ||
792 | trace_xfs_setattr(ip); | |
793 | ||
794 | error = xfs_vn_change_ok(dentry, iattr); | |
795 | if (error) | |
796 | return error; | |
797 | return xfs_setattr_nonsize(ip, iattr, 0); | |
798 | } | |
799 | ||
c4ed4243 CH |
800 | /* |
801 | * Truncate file. Must have write permission and not be a directory. | |
69bca807 JK |
802 | * |
803 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 804 | * setattr_prepare() or otherwise verifying the change is fine. |
c4ed4243 | 805 | */ |
7bf7a193 | 806 | STATIC int |
c4ed4243 CH |
807 | xfs_setattr_size( |
808 | struct xfs_inode *ip, | |
76ca4c23 | 809 | struct iattr *iattr) |
c4ed4243 CH |
810 | { |
811 | struct xfs_mount *mp = ip->i_mount; | |
812 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 813 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
814 | struct xfs_trans *tp; |
815 | int error; | |
f38996f5 | 816 | uint lock_flags = 0; |
5885ebda | 817 | bool did_zeroing = false; |
c4ed4243 | 818 | |
76ca4c23 | 819 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
e8e9ad42 | 820 | ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); |
c19b3b05 | 821 | ASSERT(S_ISREG(inode->i_mode)); |
fe60a8a0 CH |
822 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
823 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 824 | |
ce7ae151 | 825 | oldsize = inode->i_size; |
673e8e59 CH |
826 | newsize = iattr->ia_size; |
827 | ||
c4ed4243 CH |
828 | /* |
829 | * Short circuit the truncate case for zero length files. | |
830 | */ | |
673e8e59 | 831 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 832 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 833 | return 0; |
681b1200 CH |
834 | |
835 | /* | |
836 | * Use the regular setattr path to update the timestamps. | |
837 | */ | |
681b1200 CH |
838 | iattr->ia_valid &= ~ATTR_SIZE; |
839 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
840 | } |
841 | ||
842 | /* | |
843 | * Make sure that the dquots are attached to the inode. | |
844 | */ | |
c14cfcca | 845 | error = xfs_qm_dqattach(ip); |
c4ed4243 | 846 | if (error) |
76ca4c23 | 847 | return error; |
c4ed4243 | 848 | |
f0c6bcba CH |
849 | /* |
850 | * Wait for all direct I/O to complete. | |
851 | */ | |
852 | inode_dio_wait(inode); | |
853 | ||
c4ed4243 | 854 | /* |
5885ebda DC |
855 | * File data changes must be complete before we start the transaction to |
856 | * modify the inode. This needs to be done before joining the inode to | |
857 | * the transaction because the inode cannot be unlocked once it is a | |
858 | * part of the transaction. | |
859 | * | |
f0c6bcba CH |
860 | * Start with zeroing any data beyond EOF that we may expose on file |
861 | * extension, or zeroing out the rest of the block on a downward | |
862 | * truncate. | |
c4ed4243 | 863 | */ |
673e8e59 | 864 | if (newsize > oldsize) { |
f5c54717 CH |
865 | trace_xfs_zero_eof(ip, oldsize, newsize - oldsize); |
866 | error = iomap_zero_range(inode, oldsize, newsize - oldsize, | |
867 | &did_zeroing, &xfs_iomap_ops); | |
f0c6bcba | 868 | } else { |
459f0fbc CH |
869 | error = iomap_truncate_page(inode, newsize, &did_zeroing, |
870 | &xfs_iomap_ops); | |
c4ed4243 | 871 | } |
c4ed4243 | 872 | |
f0c6bcba CH |
873 | if (error) |
874 | return error; | |
875 | ||
49abc3a8 | 876 | /* |
0f9160b4 DC |
877 | * We've already locked out new page faults, so now we can safely remove |
878 | * pages from the page cache knowing they won't get refaulted until we | |
879 | * drop the XFS_MMAP_EXCL lock after the extent manipulations are | |
880 | * complete. The truncate_setsize() call also cleans partial EOF page | |
881 | * PTEs on extending truncates and hence ensures sub-page block size | |
882 | * filesystems are correctly handled, too. | |
49abc3a8 | 883 | * |
0f9160b4 DC |
884 | * We have to do all the page cache truncate work outside the |
885 | * transaction context as the "lock" order is page lock->log space | |
886 | * reservation as defined by extent allocation in the writeback path. | |
253f4911 | 887 | * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but |
0f9160b4 DC |
888 | * having already truncated the in-memory version of the file (i.e. made |
889 | * user visible changes). There's not much we can do about this, except | |
890 | * to hope that the caller sees ENOMEM and retries the truncate | |
891 | * operation. | |
350976ae EG |
892 | * |
893 | * And we update in-core i_size and truncate page cache beyond newsize | |
894 | * before writeback the [di_size, newsize] range, so we're guaranteed | |
895 | * not to write stale data past the new EOF on truncate down. | |
49abc3a8 | 896 | */ |
49abc3a8 | 897 | truncate_setsize(inode, newsize); |
c4ed4243 | 898 | |
350976ae EG |
899 | /* |
900 | * We are going to log the inode size change in this transaction so | |
901 | * any previous writes that are beyond the on disk EOF and the new | |
902 | * EOF that have not been written out need to be written here. If we | |
903 | * do not write the data out, we expose ourselves to the null files | |
904 | * problem. Note that this includes any block zeroing we did above; | |
905 | * otherwise those blocks may not be zeroed after a crash. | |
906 | */ | |
907 | if (did_zeroing || | |
908 | (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { | |
909 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, | |
910 | ip->i_d.di_size, newsize - 1); | |
911 | if (error) | |
912 | return error; | |
913 | } | |
914 | ||
253f4911 | 915 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
c4ed4243 | 916 | if (error) |
253f4911 | 917 | return error; |
c4ed4243 | 918 | |
c4ed4243 | 919 | lock_flags |= XFS_ILOCK_EXCL; |
c4ed4243 | 920 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
ddc3415a | 921 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
922 | |
923 | /* | |
924 | * Only change the c/mtime if we are changing the size or we are | |
925 | * explicitly asked to change it. This handles the semantic difference | |
926 | * between truncate() and ftruncate() as implemented in the VFS. | |
927 | * | |
928 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
929 | * special case where we need to update the times despite not having | |
930 | * these flags set. For all other operations the VFS set these flags | |
931 | * explicitly if it wants a timestamp update. | |
932 | */ | |
fe60a8a0 CH |
933 | if (newsize != oldsize && |
934 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 | 935 | iattr->ia_ctime = iattr->ia_mtime = |
c2050a45 | 936 | current_time(inode); |
fe60a8a0 | 937 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
938 | } |
939 | ||
673e8e59 CH |
940 | /* |
941 | * The first thing we do is set the size to new_size permanently on | |
942 | * disk. This way we don't have to worry about anyone ever being able | |
943 | * to look at the data being freed even in the face of a crash. | |
944 | * What we're getting around here is the case where we free a block, it | |
945 | * is allocated to another file, it is written to, and then we crash. | |
946 | * If the new data gets written to the file but the log buffers | |
947 | * containing the free and reallocation don't, then we'd end up with | |
948 | * garbage in the blocks being freed. As long as we make the new size | |
949 | * permanent before actually freeing any blocks it doesn't matter if | |
950 | * they get written to. | |
951 | */ | |
952 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
953 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
954 | ||
955 | if (newsize <= oldsize) { | |
956 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 | 957 | if (error) |
4906e215 | 958 | goto out_trans_cancel; |
c4ed4243 CH |
959 | |
960 | /* | |
961 | * Truncated "down", so we're removing references to old data | |
962 | * here - if we delay flushing for a long time, we expose | |
963 | * ourselves unduly to the notorious NULL files problem. So, | |
964 | * we mark this inode and flush it when the file is closed, | |
965 | * and do not wait the usual (long) time for writeout. | |
966 | */ | |
967 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
968 | |
969 | /* A truncate down always removes post-EOF blocks. */ | |
970 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
971 | } |
972 | ||
fe60a8a0 | 973 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 974 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 975 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 976 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
977 | |
978 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
979 | ||
ff6d6af2 | 980 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
981 | |
982 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
983 | xfs_trans_set_sync(tp); | |
984 | ||
70393313 | 985 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
986 | out_unlock: |
987 | if (lock_flags) | |
988 | xfs_iunlock(ip, lock_flags); | |
989 | return error; | |
990 | ||
c4ed4243 | 991 | out_trans_cancel: |
4906e215 | 992 | xfs_trans_cancel(tp); |
c4ed4243 CH |
993 | goto out_unlock; |
994 | } | |
995 | ||
69bca807 JK |
996 | int |
997 | xfs_vn_setattr_size( | |
998 | struct dentry *dentry, | |
999 | struct iattr *iattr) | |
1000 | { | |
1001 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
1002 | int error; | |
1003 | ||
1004 | trace_xfs_setattr(ip); | |
1005 | ||
1006 | error = xfs_vn_change_ok(dentry, iattr); | |
1007 | if (error) | |
1008 | return error; | |
1009 | return xfs_setattr_size(ip, iattr); | |
1010 | } | |
1011 | ||
1da177e4 | 1012 | STATIC int |
416c6d5b | 1013 | xfs_vn_setattr( |
76ca4c23 CH |
1014 | struct dentry *dentry, |
1015 | struct iattr *iattr) | |
1da177e4 | 1016 | { |
76ca4c23 CH |
1017 | int error; |
1018 | ||
1019 | if (iattr->ia_valid & ATTR_SIZE) { | |
69eb5fa1 DW |
1020 | struct inode *inode = d_inode(dentry); |
1021 | struct xfs_inode *ip = XFS_I(inode); | |
c63a8eae | 1022 | uint iolock; |
781355c6 | 1023 | |
c63a8eae DW |
1024 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
1025 | iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; | |
781355c6 | 1026 | |
69eb5fa1 | 1027 | error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); |
c63a8eae DW |
1028 | if (error) { |
1029 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); | |
65523218 | 1030 | return error; |
c63a8eae | 1031 | } |
e8e9ad42 | 1032 | |
0c187dc5 | 1033 | error = xfs_vn_setattr_size(dentry, iattr); |
65523218 | 1034 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); |
76ca4c23 | 1035 | } else { |
69bca807 | 1036 | error = xfs_vn_setattr_nonsize(dentry, iattr); |
76ca4c23 CH |
1037 | } |
1038 | ||
2451337d | 1039 | return error; |
1da177e4 LT |
1040 | } |
1041 | ||
69ff2826 CH |
1042 | STATIC int |
1043 | xfs_vn_update_time( | |
1044 | struct inode *inode, | |
95582b00 | 1045 | struct timespec64 *now, |
69ff2826 CH |
1046 | int flags) |
1047 | { | |
1048 | struct xfs_inode *ip = XFS_I(inode); | |
1049 | struct xfs_mount *mp = ip->i_mount; | |
c3b1b131 | 1050 | int log_flags = XFS_ILOG_TIMESTAMP; |
69ff2826 CH |
1051 | struct xfs_trans *tp; |
1052 | int error; | |
1053 | ||
1054 | trace_xfs_update_time(ip); | |
1055 | ||
c3b1b131 CH |
1056 | if (inode->i_sb->s_flags & SB_LAZYTIME) { |
1057 | if (!((flags & S_VERSION) && | |
1058 | inode_maybe_inc_iversion(inode, false))) | |
1059 | return generic_update_time(inode, now, flags); | |
1060 | ||
1061 | /* Capture the iversion update that just occurred */ | |
1062 | log_flags |= XFS_ILOG_CORE; | |
1063 | } | |
1064 | ||
253f4911 CH |
1065 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
1066 | if (error) | |
2451337d | 1067 | return error; |
69ff2826 CH |
1068 | |
1069 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3987848c | 1070 | if (flags & S_CTIME) |
69ff2826 | 1071 | inode->i_ctime = *now; |
3987848c | 1072 | if (flags & S_MTIME) |
69ff2826 | 1073 | inode->i_mtime = *now; |
3987848c | 1074 | if (flags & S_ATIME) |
69ff2826 | 1075 | inode->i_atime = *now; |
3987848c | 1076 | |
69ff2826 | 1077 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
c3b1b131 | 1078 | xfs_trans_log_inode(tp, ip, log_flags); |
70393313 | 1079 | return xfs_trans_commit(tp); |
69ff2826 CH |
1080 | } |
1081 | ||
f35642e2 ES |
1082 | STATIC int |
1083 | xfs_vn_fiemap( | |
1084 | struct inode *inode, | |
1085 | struct fiemap_extent_info *fieinfo, | |
1086 | u64 start, | |
1087 | u64 length) | |
1088 | { | |
f35642e2 ES |
1089 | int error; |
1090 | ||
d2bb140e | 1091 | xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); |
1d4795e7 CH |
1092 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1093 | fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR; | |
1094 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1095 | &xfs_xattr_iomap_ops); | |
1096 | } else { | |
1097 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1098 | &xfs_iomap_ops); | |
1099 | } | |
d2bb140e | 1100 | xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); |
f35642e2 | 1101 | |
d2bb140e | 1102 | return error; |
f35642e2 ES |
1103 | } |
1104 | ||
99b6436b ZYW |
1105 | STATIC int |
1106 | xfs_vn_tmpfile( | |
1107 | struct inode *dir, | |
1108 | struct dentry *dentry, | |
1109 | umode_t mode) | |
1110 | { | |
d540e43b | 1111 | return xfs_generic_create(dir, dentry, mode, 0, true); |
99b6436b ZYW |
1112 | } |
1113 | ||
41be8bed | 1114 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1115 | .get_acl = xfs_get_acl, |
2401dc29 | 1116 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1117 | .getattr = xfs_vn_getattr, |
1118 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1119 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1120 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1121 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1122 | }; |
1123 | ||
41be8bed | 1124 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1125 | .create = xfs_vn_create, |
1126 | .lookup = xfs_vn_lookup, | |
1127 | .link = xfs_vn_link, | |
1128 | .unlink = xfs_vn_unlink, | |
1129 | .symlink = xfs_vn_symlink, | |
1130 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1131 | /* |
1132 | * Yes, XFS uses the same method for rmdir and unlink. | |
1133 | * | |
1134 | * There are some subtile differences deeper in the code, | |
1135 | * but we use S_ISDIR to check for those. | |
1136 | */ | |
1137 | .rmdir = xfs_vn_unlink, | |
416c6d5b | 1138 | .mknod = xfs_vn_mknod, |
2773bf00 | 1139 | .rename = xfs_vn_rename, |
4e34e719 | 1140 | .get_acl = xfs_get_acl, |
2401dc29 | 1141 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1142 | .getattr = xfs_vn_getattr, |
1143 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1144 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1145 | .update_time = xfs_vn_update_time, |
99b6436b | 1146 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1147 | }; |
1148 | ||
41be8bed | 1149 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1150 | .create = xfs_vn_create, |
1151 | .lookup = xfs_vn_ci_lookup, | |
1152 | .link = xfs_vn_link, | |
1153 | .unlink = xfs_vn_unlink, | |
1154 | .symlink = xfs_vn_symlink, | |
1155 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1156 | /* |
1157 | * Yes, XFS uses the same method for rmdir and unlink. | |
1158 | * | |
1159 | * There are some subtile differences deeper in the code, | |
1160 | * but we use S_ISDIR to check for those. | |
1161 | */ | |
1162 | .rmdir = xfs_vn_unlink, | |
384f3ced | 1163 | .mknod = xfs_vn_mknod, |
2773bf00 | 1164 | .rename = xfs_vn_rename, |
4e34e719 | 1165 | .get_acl = xfs_get_acl, |
2401dc29 | 1166 | .set_acl = xfs_set_acl, |
384f3ced BN |
1167 | .getattr = xfs_vn_getattr, |
1168 | .setattr = xfs_vn_setattr, | |
384f3ced | 1169 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1170 | .update_time = xfs_vn_update_time, |
99b6436b | 1171 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1172 | }; |
1173 | ||
41be8bed | 1174 | static const struct inode_operations xfs_symlink_inode_operations = { |
6b255391 | 1175 | .get_link = xfs_vn_get_link, |
416c6d5b NS |
1176 | .getattr = xfs_vn_getattr, |
1177 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1178 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1179 | .update_time = xfs_vn_update_time, |
1da177e4 | 1180 | }; |
41be8bed | 1181 | |
30ee052e | 1182 | static const struct inode_operations xfs_inline_symlink_inode_operations = { |
30ee052e CH |
1183 | .get_link = xfs_vn_get_link_inline, |
1184 | .getattr = xfs_vn_getattr, | |
1185 | .setattr = xfs_vn_setattr, | |
30ee052e CH |
1186 | .listxattr = xfs_vn_listxattr, |
1187 | .update_time = xfs_vn_update_time, | |
1188 | }; | |
1189 | ||
ba23cba9 DW |
1190 | /* Figure out if this file actually supports DAX. */ |
1191 | static bool | |
1192 | xfs_inode_supports_dax( | |
1193 | struct xfs_inode *ip) | |
1194 | { | |
1195 | struct xfs_mount *mp = ip->i_mount; | |
1196 | ||
1197 | /* Only supported on non-reflinked files. */ | |
1198 | if (!S_ISREG(VFS_I(ip)->i_mode) || xfs_is_reflink_inode(ip)) | |
1199 | return false; | |
1200 | ||
1201 | /* DAX mount option or DAX iflag must be set. */ | |
1202 | if (!(mp->m_flags & XFS_MOUNT_DAX) && | |
1203 | !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) | |
1204 | return false; | |
1205 | ||
1206 | /* Block size must match page size */ | |
1207 | if (mp->m_sb.sb_blocksize != PAGE_SIZE) | |
1208 | return false; | |
1209 | ||
1210 | /* Device has to support DAX too. */ | |
1211 | return xfs_find_daxdev_for_inode(VFS_I(ip)) != NULL; | |
1212 | } | |
1213 | ||
41be8bed CH |
1214 | STATIC void |
1215 | xfs_diflags_to_iflags( | |
1216 | struct inode *inode, | |
1217 | struct xfs_inode *ip) | |
1218 | { | |
cbe4dab1 DC |
1219 | uint16_t flags = ip->i_d.di_flags; |
1220 | ||
1221 | inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | | |
1222 | S_NOATIME | S_DAX); | |
1223 | ||
1224 | if (flags & XFS_DIFLAG_IMMUTABLE) | |
41be8bed | 1225 | inode->i_flags |= S_IMMUTABLE; |
cbe4dab1 | 1226 | if (flags & XFS_DIFLAG_APPEND) |
41be8bed | 1227 | inode->i_flags |= S_APPEND; |
cbe4dab1 | 1228 | if (flags & XFS_DIFLAG_SYNC) |
41be8bed | 1229 | inode->i_flags |= S_SYNC; |
cbe4dab1 | 1230 | if (flags & XFS_DIFLAG_NOATIME) |
41be8bed | 1231 | inode->i_flags |= S_NOATIME; |
ba23cba9 | 1232 | if (xfs_inode_supports_dax(ip)) |
cbe4dab1 | 1233 | inode->i_flags |= S_DAX; |
41be8bed CH |
1234 | } |
1235 | ||
1236 | /* | |
2b3d1d41 | 1237 | * Initialize the Linux inode. |
bf904248 | 1238 | * |
58c90473 DC |
1239 | * When reading existing inodes from disk this is called directly from xfs_iget, |
1240 | * when creating a new inode it is called from xfs_ialloc after setting up the | |
1241 | * inode. These callers have different criteria for clearing XFS_INEW, so leave | |
1242 | * it up to the caller to deal with unlocking the inode appropriately. | |
41be8bed CH |
1243 | */ |
1244 | void | |
1245 | xfs_setup_inode( | |
1246 | struct xfs_inode *ip) | |
1247 | { | |
bf904248 | 1248 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1249 | gfp_t gfp_mask; |
bf904248 DC |
1250 | |
1251 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1252 | inode->i_state = I_NEW; |
646ec461 CH |
1253 | |
1254 | inode_sb_list_add(inode); | |
c6f6cd06 CH |
1255 | /* make the inode look hashed for the writeback code */ |
1256 | hlist_add_fake(&inode->i_hash); | |
41be8bed | 1257 | |
7aab1b28 DE |
1258 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1259 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed | 1260 | |
41be8bed | 1261 | i_size_write(inode, ip->i_d.di_size); |
41be8bed | 1262 | xfs_diflags_to_iflags(inode, ip); |
41be8bed | 1263 | |
2b3d1d41 | 1264 | if (S_ISDIR(inode->i_mode)) { |
ef215e39 DC |
1265 | /* |
1266 | * We set the i_rwsem class here to avoid potential races with | |
1267 | * lockdep_annotate_inode_mutex_key() reinitialising the lock | |
1268 | * after a filehandle lookup has already found the inode in | |
1269 | * cache before it has been unlocked via unlock_new_inode(). | |
1270 | */ | |
1271 | lockdep_set_class(&inode->i_rwsem, | |
1272 | &inode->i_sb->s_type->i_mutex_dir_key); | |
93a8614e | 1273 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
32c5483a | 1274 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
2b3d1d41 CH |
1275 | } else { |
1276 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; | |
1277 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); | |
41be8bed CH |
1278 | } |
1279 | ||
ad22c7a0 DC |
1280 | /* |
1281 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1282 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1283 | * stacks or deadlocking. | |
1284 | */ | |
1285 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1286 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1287 | ||
510792ee CH |
1288 | /* |
1289 | * If there is no attribute fork no ACL can exist on this inode, | |
1290 | * and it can't have any file capabilities attached to it either. | |
1291 | */ | |
1292 | if (!XFS_IFORK_Q(ip)) { | |
1293 | inode_has_no_xattr(inode); | |
6311b108 | 1294 | cache_no_acl(inode); |
510792ee | 1295 | } |
41be8bed | 1296 | } |
2b3d1d41 CH |
1297 | |
1298 | void | |
1299 | xfs_setup_iops( | |
1300 | struct xfs_inode *ip) | |
1301 | { | |
1302 | struct inode *inode = &ip->i_vnode; | |
1303 | ||
41be8bed CH |
1304 | switch (inode->i_mode & S_IFMT) { |
1305 | case S_IFREG: | |
1306 | inode->i_op = &xfs_inode_operations; | |
1307 | inode->i_fop = &xfs_file_operations; | |
6e2608df DW |
1308 | if (IS_DAX(inode)) |
1309 | inode->i_mapping->a_ops = &xfs_dax_aops; | |
1310 | else | |
1311 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
41be8bed CH |
1312 | break; |
1313 | case S_IFDIR: | |
1314 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
1315 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1316 | else | |
1317 | inode->i_op = &xfs_dir_inode_operations; | |
1318 | inode->i_fop = &xfs_dir_file_operations; | |
1319 | break; | |
1320 | case S_IFLNK: | |
30ee052e CH |
1321 | if (ip->i_df.if_flags & XFS_IFINLINE) |
1322 | inode->i_op = &xfs_inline_symlink_inode_operations; | |
1323 | else | |
1324 | inode->i_op = &xfs_symlink_inode_operations; | |
41be8bed CH |
1325 | break; |
1326 | default: | |
1327 | inode->i_op = &xfs_inode_operations; | |
1328 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1329 | break; | |
1330 | } | |
41be8bed | 1331 | } |