Commit | Line | Data |
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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" |
1da177e4 | 13 | #include "xfs_inode.h" |
239880ef | 14 | #include "xfs_acl.h" |
239880ef | 15 | #include "xfs_quota.h" |
1da177e4 | 16 | #include "xfs_attr.h" |
239880ef | 17 | #include "xfs_trans.h" |
0b1b213f | 18 | #include "xfs_trace.h" |
27b52867 | 19 | #include "xfs_icache.h" |
c24b5dfa | 20 | #include "xfs_symlink.h" |
1b767ee3 | 21 | #include "xfs_dir2.h" |
68a9f5e7 | 22 | #include "xfs_iomap.h" |
1da177e4 LT |
23 | |
24 | #include <linux/xattr.h> | |
ef14f0c1 | 25 | #include <linux/posix_acl.h> |
446ada4a | 26 | #include <linux/security.h> |
c3b1b131 | 27 | #include <linux/iversion.h> |
1da177e4 | 28 | |
93a8614e DC |
29 | /* |
30 | * Directories have different lock order w.r.t. mmap_sem compared to regular | |
31 | * files. This is due to readdir potentially triggering page faults on a user | |
32 | * buffer inside filldir(), and this happens with the ilock on the directory | |
33 | * held. For regular files, the lock order is the other way around - the | |
34 | * mmap_sem is taken during the page fault, and then we lock the ilock to do | |
35 | * block mapping. Hence we need a different class for the directory ilock so | |
36 | * that lockdep can tell them apart. | |
37 | */ | |
38 | static struct lock_class_key xfs_nondir_ilock_class; | |
39 | static struct lock_class_key xfs_dir_ilock_class; | |
40 | ||
8d2a5e6e DC |
41 | static int |
42 | xfs_initxattrs( | |
43 | struct inode *inode, | |
44 | const struct xattr *xattr_array, | |
45 | void *fs_info) | |
9d8f13ba | 46 | { |
8d2a5e6e DC |
47 | const struct xattr *xattr; |
48 | struct xfs_inode *ip = XFS_I(inode); | |
49 | int error = 0; | |
9d8f13ba MZ |
50 | |
51 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
2451337d | 52 | error = xfs_attr_set(ip, xattr->name, xattr->value, |
a5a14de2 | 53 | xattr->value_len, ATTR_SECURE); |
9d8f13ba MZ |
54 | if (error < 0) |
55 | break; | |
56 | } | |
57 | return error; | |
58 | } | |
59 | ||
446ada4a NS |
60 | /* |
61 | * Hook in SELinux. This is not quite correct yet, what we really need | |
62 | * here (as we do for default ACLs) is a mechanism by which creation of | |
63 | * these attrs can be journalled at inode creation time (along with the | |
64 | * inode, of course, such that log replay can't cause these to be lost). | |
65 | */ | |
9d8f13ba | 66 | |
446ada4a | 67 | STATIC int |
416c6d5b | 68 | xfs_init_security( |
af048193 | 69 | struct inode *inode, |
2a7dba39 EP |
70 | struct inode *dir, |
71 | const struct qstr *qstr) | |
446ada4a | 72 | { |
2451337d | 73 | return security_inode_init_security(inode, dir, qstr, |
a5a14de2 | 74 | &xfs_initxattrs, NULL); |
446ada4a NS |
75 | } |
76 | ||
556b8b16 BN |
77 | static void |
78 | xfs_dentry_to_name( | |
fab8eef8 AG |
79 | struct xfs_name *namep, |
80 | struct dentry *dentry) | |
81 | { | |
82 | namep->name = dentry->d_name.name; | |
83 | namep->len = dentry->d_name.len; | |
84 | namep->type = XFS_DIR3_FT_UNKNOWN; | |
85 | } | |
86 | ||
87 | static int | |
88 | xfs_dentry_mode_to_name( | |
556b8b16 | 89 | struct xfs_name *namep, |
0cb97766 DC |
90 | struct dentry *dentry, |
91 | int mode) | |
556b8b16 BN |
92 | { |
93 | namep->name = dentry->d_name.name; | |
94 | namep->len = dentry->d_name.len; | |
1fc4d33f | 95 | namep->type = xfs_mode_to_ftype(mode); |
fab8eef8 AG |
96 | |
97 | if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN)) | |
98 | return -EFSCORRUPTED; | |
99 | ||
100 | return 0; | |
556b8b16 BN |
101 | } |
102 | ||
7989cb8e | 103 | STATIC void |
416c6d5b | 104 | xfs_cleanup_inode( |
739bfb2a | 105 | struct inode *dir, |
af048193 | 106 | struct inode *inode, |
8f112e3b | 107 | struct dentry *dentry) |
3a69c7dc | 108 | { |
556b8b16 | 109 | struct xfs_name teardown; |
3a69c7dc YL |
110 | |
111 | /* Oh, the horror. | |
220b5284 | 112 | * If we can't add the ACL or we fail in |
416c6d5b | 113 | * xfs_init_security we must back out. |
3a69c7dc YL |
114 | * ENOSPC can hit here, among other things. |
115 | */ | |
fab8eef8 | 116 | xfs_dentry_to_name(&teardown, dentry); |
3a69c7dc | 117 | |
8f112e3b | 118 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
3a69c7dc YL |
119 | } |
120 | ||
1da177e4 | 121 | STATIC int |
d540e43b | 122 | xfs_generic_create( |
1da177e4 LT |
123 | struct inode *dir, |
124 | struct dentry *dentry, | |
1a67aafb | 125 | umode_t mode, |
d540e43b BF |
126 | dev_t rdev, |
127 | bool tmpfile) /* unnamed file */ | |
1da177e4 | 128 | { |
db0bb7ba | 129 | struct inode *inode; |
979ebab1 | 130 | struct xfs_inode *ip = NULL; |
2401dc29 | 131 | struct posix_acl *default_acl, *acl; |
556b8b16 | 132 | struct xfs_name name; |
1da177e4 LT |
133 | int error; |
134 | ||
135 | /* | |
136 | * Irix uses Missed'em'V split, but doesn't want to see | |
137 | * the upper 5 bits of (14bit) major. | |
138 | */ | |
517b5e8c CH |
139 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
140 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
141 | return -EINVAL; | |
517b5e8c CH |
142 | } else { |
143 | rdev = 0; | |
144 | } | |
1da177e4 | 145 | |
2401dc29 CH |
146 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
147 | if (error) | |
148 | return error; | |
1da177e4 | 149 | |
fab8eef8 AG |
150 | /* Verify mode is valid also for tmpfile case */ |
151 | error = xfs_dentry_mode_to_name(&name, dentry, mode); | |
152 | if (unlikely(error)) | |
153 | goto out_free_acl; | |
154 | ||
d540e43b | 155 | if (!tmpfile) { |
d540e43b BF |
156 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
157 | } else { | |
a1f69417 | 158 | error = xfs_create_tmpfile(XFS_I(dir), mode, &ip); |
d540e43b | 159 | } |
db0bb7ba CH |
160 | if (unlikely(error)) |
161 | goto out_free_acl; | |
446ada4a | 162 | |
01651646 | 163 | inode = VFS_I(ip); |
979ebab1 | 164 | |
2a7dba39 | 165 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
166 | if (unlikely(error)) |
167 | goto out_cleanup_inode; | |
168 | ||
2401dc29 | 169 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 170 | if (default_acl) { |
8ba35875 | 171 | error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
2401dc29 | 172 | if (error) |
db0bb7ba | 173 | goto out_cleanup_inode; |
1da177e4 | 174 | } |
2401dc29 | 175 | if (acl) { |
8ba35875 | 176 | error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
2401dc29 CH |
177 | if (error) |
178 | goto out_cleanup_inode; | |
179 | } | |
180 | #endif | |
1da177e4 | 181 | |
2b3d1d41 CH |
182 | xfs_setup_iops(ip); |
183 | ||
c4a6bf7f DW |
184 | if (tmpfile) { |
185 | /* | |
186 | * The VFS requires that any inode fed to d_tmpfile must have | |
187 | * nlink == 1 so that it can decrement the nlink in d_tmpfile. | |
188 | * However, we created the temp file with nlink == 0 because | |
189 | * we're not allowed to put an inode with nlink > 0 on the | |
190 | * unlinked list. Therefore we have to set nlink to 1 so that | |
191 | * d_tmpfile can immediately set it back to zero. | |
192 | */ | |
193 | set_nlink(inode, 1); | |
d540e43b | 194 | d_tmpfile(dentry, inode); |
c4a6bf7f | 195 | } else |
d540e43b BF |
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); | |
44a8736b | 211 | xfs_irele(ip); |
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); |
44a8736b | 393 | xfs_irele(cip); |
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 | { | |
ae294787 DW |
473 | char *link; |
474 | ||
30ee052e | 475 | ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE); |
ae294787 DW |
476 | |
477 | /* | |
478 | * The VFS crashes on a NULL pointer, so return -EFSCORRUPTED if | |
479 | * if_data is junk. | |
480 | */ | |
481 | link = XFS_I(inode)->i_df.if_u1.if_data; | |
482 | if (!link) | |
483 | return ERR_PTR(-EFSCORRUPTED); | |
484 | return link; | |
30ee052e CH |
485 | } |
486 | ||
1da177e4 | 487 | STATIC int |
416c6d5b | 488 | xfs_vn_getattr( |
a528d35e DH |
489 | const struct path *path, |
490 | struct kstat *stat, | |
491 | u32 request_mask, | |
492 | unsigned int query_flags) | |
1da177e4 | 493 | { |
a528d35e | 494 | struct inode *inode = d_inode(path->dentry); |
c43f4087 CH |
495 | struct xfs_inode *ip = XFS_I(inode); |
496 | struct xfs_mount *mp = ip->i_mount; | |
497 | ||
cca28fb8 | 498 | trace_xfs_getattr(ip); |
c43f4087 CH |
499 | |
500 | if (XFS_FORCED_SHUTDOWN(mp)) | |
b474c7ae | 501 | return -EIO; |
c43f4087 CH |
502 | |
503 | stat->size = XFS_ISIZE(ip); | |
504 | stat->dev = inode->i_sb->s_dev; | |
c19b3b05 | 505 | stat->mode = inode->i_mode; |
54d7b5c1 | 506 | stat->nlink = inode->i_nlink; |
7aab1b28 DE |
507 | stat->uid = inode->i_uid; |
508 | stat->gid = inode->i_gid; | |
c43f4087 | 509 | stat->ino = ip->i_ino; |
c43f4087 | 510 | stat->atime = inode->i_atime; |
f9581b14 CH |
511 | stat->mtime = inode->i_mtime; |
512 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
513 | stat->blocks = |
514 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
515 | ||
5f955f26 DW |
516 | if (ip->i_d.di_version == 3) { |
517 | if (request_mask & STATX_BTIME) { | |
518 | stat->result_mask |= STATX_BTIME; | |
519 | stat->btime.tv_sec = ip->i_d.di_crtime.t_sec; | |
520 | stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec; | |
521 | } | |
522 | } | |
523 | ||
1b9598c8 LR |
524 | /* |
525 | * Note: If you add another clause to set an attribute flag, please | |
526 | * update attributes_mask below. | |
527 | */ | |
5f955f26 DW |
528 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) |
529 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
530 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
531 | stat->attributes |= STATX_ATTR_APPEND; | |
532 | if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP) | |
533 | stat->attributes |= STATX_ATTR_NODUMP; | |
c43f4087 | 534 | |
1b9598c8 LR |
535 | stat->attributes_mask |= (STATX_ATTR_IMMUTABLE | |
536 | STATX_ATTR_APPEND | | |
537 | STATX_ATTR_NODUMP); | |
538 | ||
c43f4087 CH |
539 | switch (inode->i_mode & S_IFMT) { |
540 | case S_IFBLK: | |
541 | case S_IFCHR: | |
542 | stat->blksize = BLKDEV_IOSIZE; | |
66f36464 | 543 | stat->rdev = inode->i_rdev; |
c43f4087 CH |
544 | break; |
545 | default: | |
71ddabb9 | 546 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
547 | /* |
548 | * If the file blocks are being allocated from a | |
549 | * realtime volume, then return the inode's realtime | |
550 | * extent size or the realtime volume's extent size. | |
551 | */ | |
552 | stat->blksize = | |
553 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
554 | } else | |
555 | stat->blksize = xfs_preferred_iosize(mp); | |
556 | stat->rdev = 0; | |
557 | break; | |
69e23b9a | 558 | } |
c43f4087 CH |
559 | |
560 | return 0; | |
1da177e4 LT |
561 | } |
562 | ||
56c19e89 DC |
563 | static void |
564 | xfs_setattr_mode( | |
56c19e89 DC |
565 | struct xfs_inode *ip, |
566 | struct iattr *iattr) | |
567 | { | |
0c3d88df CH |
568 | struct inode *inode = VFS_I(ip); |
569 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 570 | |
56c19e89 DC |
571 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
572 | ||
56c19e89 DC |
573 | inode->i_mode &= S_IFMT; |
574 | inode->i_mode |= mode & ~S_IFMT; | |
575 | } | |
576 | ||
52785112 | 577 | void |
c91c46c1 CH |
578 | xfs_setattr_time( |
579 | struct xfs_inode *ip, | |
580 | struct iattr *iattr) | |
581 | { | |
582 | struct inode *inode = VFS_I(ip); | |
583 | ||
584 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
585 | ||
3987848c | 586 | if (iattr->ia_valid & ATTR_ATIME) |
c91c46c1 | 587 | inode->i_atime = iattr->ia_atime; |
3987848c | 588 | if (iattr->ia_valid & ATTR_CTIME) |
c91c46c1 | 589 | inode->i_ctime = iattr->ia_ctime; |
3987848c | 590 | if (iattr->ia_valid & ATTR_MTIME) |
c91c46c1 | 591 | inode->i_mtime = iattr->ia_mtime; |
c91c46c1 CH |
592 | } |
593 | ||
69bca807 JK |
594 | static int |
595 | xfs_vn_change_ok( | |
596 | struct dentry *dentry, | |
597 | struct iattr *iattr) | |
598 | { | |
31051c85 | 599 | struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; |
69bca807 JK |
600 | |
601 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
602 | return -EROFS; | |
603 | ||
604 | if (XFS_FORCED_SHUTDOWN(mp)) | |
605 | return -EIO; | |
606 | ||
31051c85 | 607 | return setattr_prepare(dentry, iattr); |
69bca807 JK |
608 | } |
609 | ||
610 | /* | |
611 | * Set non-size attributes of an inode. | |
612 | * | |
613 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 614 | * setattr_prepare() or otherwise verifying the change is fine. |
69bca807 | 615 | */ |
c4ed4243 CH |
616 | int |
617 | xfs_setattr_nonsize( | |
618 | struct xfs_inode *ip, | |
619 | struct iattr *iattr, | |
620 | int flags) | |
621 | { | |
622 | xfs_mount_t *mp = ip->i_mount; | |
623 | struct inode *inode = VFS_I(ip); | |
624 | int mask = iattr->ia_valid; | |
625 | xfs_trans_t *tp; | |
626 | int error; | |
7aab1b28 DE |
627 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
628 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
629 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
630 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
631 | ||
c4ed4243 CH |
632 | ASSERT((mask & ATTR_SIZE) == 0); |
633 | ||
634 | /* | |
635 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
636 | * before we start any other transactions. Trying to do this later | |
637 | * is messy. We don't care to take a readlock to look at the ids | |
638 | * in inode here, because we can't hold it across the trans_reserve. | |
639 | * If the IDs do change before we take the ilock, we're covered | |
640 | * because the i_*dquot fields will get updated anyway. | |
641 | */ | |
642 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
643 | uint qflags = 0; | |
644 | ||
645 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
646 | uid = iattr->ia_uid; | |
647 | qflags |= XFS_QMOPT_UQUOTA; | |
648 | } else { | |
7aab1b28 | 649 | uid = inode->i_uid; |
c4ed4243 CH |
650 | } |
651 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
652 | gid = iattr->ia_gid; | |
653 | qflags |= XFS_QMOPT_GQUOTA; | |
654 | } else { | |
7aab1b28 | 655 | gid = inode->i_gid; |
c4ed4243 CH |
656 | } |
657 | ||
658 | /* | |
659 | * We take a reference when we initialize udqp and gdqp, | |
660 | * so it is important that we never blindly double trip on | |
661 | * the same variable. See xfs_create() for an example. | |
662 | */ | |
663 | ASSERT(udqp == NULL); | |
664 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
665 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
666 | xfs_kgid_to_gid(gid), | |
667 | xfs_get_projid(ip), | |
668 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
669 | if (error) |
670 | return error; | |
671 | } | |
672 | ||
253f4911 | 673 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
c4ed4243 | 674 | if (error) |
253f4911 | 675 | goto out_dqrele; |
c4ed4243 CH |
676 | |
677 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
253f4911 | 678 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
679 | |
680 | /* | |
681 | * Change file ownership. Must be the owner or privileged. | |
682 | */ | |
683 | if (mask & (ATTR_UID|ATTR_GID)) { | |
684 | /* | |
685 | * These IDs could have changed since we last looked at them. | |
686 | * But, we're assured that if the ownership did change | |
687 | * while we didn't have the inode locked, inode's dquot(s) | |
688 | * would have changed also. | |
689 | */ | |
7aab1b28 DE |
690 | iuid = inode->i_uid; |
691 | igid = inode->i_gid; | |
c4ed4243 CH |
692 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
693 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
694 | ||
695 | /* | |
696 | * Do a quota reservation only if uid/gid is actually | |
697 | * going to change. | |
698 | */ | |
699 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
700 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
701 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
702 | ASSERT(tp); |
703 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 704 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
705 | XFS_QMOPT_FORCE_RES : 0); |
706 | if (error) /* out of quota */ | |
253f4911 | 707 | goto out_cancel; |
c4ed4243 CH |
708 | } |
709 | } | |
710 | ||
c4ed4243 CH |
711 | /* |
712 | * Change file ownership. Must be the owner or privileged. | |
713 | */ | |
714 | if (mask & (ATTR_UID|ATTR_GID)) { | |
715 | /* | |
716 | * CAP_FSETID overrides the following restrictions: | |
717 | * | |
718 | * The set-user-ID and set-group-ID bits of a file will be | |
719 | * cleared upon successful return from chown() | |
720 | */ | |
c19b3b05 | 721 | if ((inode->i_mode & (S_ISUID|S_ISGID)) && |
c4ed4243 | 722 | !capable(CAP_FSETID)) |
c19b3b05 | 723 | inode->i_mode &= ~(S_ISUID|S_ISGID); |
c4ed4243 CH |
724 | |
725 | /* | |
726 | * Change the ownerships and register quota modifications | |
727 | * in the transaction. | |
728 | */ | |
7aab1b28 | 729 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
730 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
731 | ASSERT(mask & ATTR_UID); | |
732 | ASSERT(udqp); | |
733 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
734 | &ip->i_udquot, udqp); | |
735 | } | |
7aab1b28 | 736 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
737 | inode->i_uid = uid; |
738 | } | |
7aab1b28 | 739 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 740 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
741 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
742 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
743 | ASSERT(mask & ATTR_GID); |
744 | ASSERT(gdqp); | |
745 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
746 | &ip->i_gdquot, gdqp); | |
747 | } | |
7aab1b28 | 748 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
749 | inode->i_gid = gid; |
750 | } | |
751 | } | |
752 | ||
56c19e89 | 753 | if (mask & ATTR_MODE) |
0c3d88df | 754 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
755 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
756 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
757 | |
758 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
759 | ||
ff6d6af2 | 760 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
761 | |
762 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
763 | xfs_trans_set_sync(tp); | |
70393313 | 764 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
765 | |
766 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
767 | ||
768 | /* | |
769 | * Release any dquot(s) the inode had kept before chown. | |
770 | */ | |
771 | xfs_qm_dqrele(olddquot1); | |
772 | xfs_qm_dqrele(olddquot2); | |
773 | xfs_qm_dqrele(udqp); | |
774 | xfs_qm_dqrele(gdqp); | |
775 | ||
776 | if (error) | |
b474c7ae | 777 | return error; |
c4ed4243 CH |
778 | |
779 | /* | |
780 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
781 | * update. We could avoid this with linked transactions | |
782 | * and passing down the transaction pointer all the way | |
783 | * to attr_set. No previous user of the generic | |
784 | * Posix ACL code seems to care about this issue either. | |
785 | */ | |
786 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2451337d | 787 | error = posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 | 788 | if (error) |
b474c7ae | 789 | return error; |
c4ed4243 CH |
790 | } |
791 | ||
792 | return 0; | |
793 | ||
253f4911 | 794 | out_cancel: |
4906e215 | 795 | xfs_trans_cancel(tp); |
1fb254aa | 796 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
253f4911 | 797 | out_dqrele: |
c4ed4243 CH |
798 | xfs_qm_dqrele(udqp); |
799 | xfs_qm_dqrele(gdqp); | |
800 | return error; | |
801 | } | |
802 | ||
69bca807 JK |
803 | int |
804 | xfs_vn_setattr_nonsize( | |
805 | struct dentry *dentry, | |
806 | struct iattr *iattr) | |
807 | { | |
808 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
809 | int error; | |
810 | ||
811 | trace_xfs_setattr(ip); | |
812 | ||
813 | error = xfs_vn_change_ok(dentry, iattr); | |
814 | if (error) | |
815 | return error; | |
816 | return xfs_setattr_nonsize(ip, iattr, 0); | |
817 | } | |
818 | ||
c4ed4243 CH |
819 | /* |
820 | * Truncate file. Must have write permission and not be a directory. | |
69bca807 JK |
821 | * |
822 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 823 | * setattr_prepare() or otherwise verifying the change is fine. |
c4ed4243 | 824 | */ |
7bf7a193 | 825 | STATIC int |
c4ed4243 CH |
826 | xfs_setattr_size( |
827 | struct xfs_inode *ip, | |
76ca4c23 | 828 | struct iattr *iattr) |
c4ed4243 CH |
829 | { |
830 | struct xfs_mount *mp = ip->i_mount; | |
831 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 832 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
833 | struct xfs_trans *tp; |
834 | int error; | |
f38996f5 | 835 | uint lock_flags = 0; |
5885ebda | 836 | bool did_zeroing = false; |
c4ed4243 | 837 | |
76ca4c23 | 838 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
e8e9ad42 | 839 | ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); |
c19b3b05 | 840 | ASSERT(S_ISREG(inode->i_mode)); |
fe60a8a0 CH |
841 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
842 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 843 | |
ce7ae151 | 844 | oldsize = inode->i_size; |
673e8e59 CH |
845 | newsize = iattr->ia_size; |
846 | ||
c4ed4243 CH |
847 | /* |
848 | * Short circuit the truncate case for zero length files. | |
849 | */ | |
673e8e59 | 850 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 851 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 852 | return 0; |
681b1200 CH |
853 | |
854 | /* | |
855 | * Use the regular setattr path to update the timestamps. | |
856 | */ | |
681b1200 CH |
857 | iattr->ia_valid &= ~ATTR_SIZE; |
858 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
859 | } |
860 | ||
861 | /* | |
862 | * Make sure that the dquots are attached to the inode. | |
863 | */ | |
c14cfcca | 864 | error = xfs_qm_dqattach(ip); |
c4ed4243 | 865 | if (error) |
76ca4c23 | 866 | return error; |
c4ed4243 | 867 | |
f0c6bcba CH |
868 | /* |
869 | * Wait for all direct I/O to complete. | |
870 | */ | |
871 | inode_dio_wait(inode); | |
872 | ||
c4ed4243 | 873 | /* |
5885ebda DC |
874 | * File data changes must be complete before we start the transaction to |
875 | * modify the inode. This needs to be done before joining the inode to | |
876 | * the transaction because the inode cannot be unlocked once it is a | |
877 | * part of the transaction. | |
878 | * | |
f0c6bcba CH |
879 | * Start with zeroing any data beyond EOF that we may expose on file |
880 | * extension, or zeroing out the rest of the block on a downward | |
881 | * truncate. | |
c4ed4243 | 882 | */ |
673e8e59 | 883 | if (newsize > oldsize) { |
f5c54717 CH |
884 | trace_xfs_zero_eof(ip, oldsize, newsize - oldsize); |
885 | error = iomap_zero_range(inode, oldsize, newsize - oldsize, | |
886 | &did_zeroing, &xfs_iomap_ops); | |
f0c6bcba | 887 | } else { |
459f0fbc CH |
888 | error = iomap_truncate_page(inode, newsize, &did_zeroing, |
889 | &xfs_iomap_ops); | |
c4ed4243 | 890 | } |
c4ed4243 | 891 | |
f0c6bcba CH |
892 | if (error) |
893 | return error; | |
894 | ||
49abc3a8 | 895 | /* |
0f9160b4 DC |
896 | * We've already locked out new page faults, so now we can safely remove |
897 | * pages from the page cache knowing they won't get refaulted until we | |
898 | * drop the XFS_MMAP_EXCL lock after the extent manipulations are | |
899 | * complete. The truncate_setsize() call also cleans partial EOF page | |
900 | * PTEs on extending truncates and hence ensures sub-page block size | |
901 | * filesystems are correctly handled, too. | |
49abc3a8 | 902 | * |
0f9160b4 DC |
903 | * We have to do all the page cache truncate work outside the |
904 | * transaction context as the "lock" order is page lock->log space | |
905 | * reservation as defined by extent allocation in the writeback path. | |
253f4911 | 906 | * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but |
0f9160b4 DC |
907 | * having already truncated the in-memory version of the file (i.e. made |
908 | * user visible changes). There's not much we can do about this, except | |
909 | * to hope that the caller sees ENOMEM and retries the truncate | |
910 | * operation. | |
350976ae EG |
911 | * |
912 | * And we update in-core i_size and truncate page cache beyond newsize | |
913 | * before writeback the [di_size, newsize] range, so we're guaranteed | |
914 | * not to write stale data past the new EOF on truncate down. | |
49abc3a8 | 915 | */ |
49abc3a8 | 916 | truncate_setsize(inode, newsize); |
c4ed4243 | 917 | |
350976ae EG |
918 | /* |
919 | * We are going to log the inode size change in this transaction so | |
920 | * any previous writes that are beyond the on disk EOF and the new | |
921 | * EOF that have not been written out need to be written here. If we | |
922 | * do not write the data out, we expose ourselves to the null files | |
923 | * problem. Note that this includes any block zeroing we did above; | |
924 | * otherwise those blocks may not be zeroed after a crash. | |
925 | */ | |
926 | if (did_zeroing || | |
927 | (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { | |
928 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, | |
929 | ip->i_d.di_size, newsize - 1); | |
930 | if (error) | |
931 | return error; | |
932 | } | |
933 | ||
253f4911 | 934 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
c4ed4243 | 935 | if (error) |
253f4911 | 936 | return error; |
c4ed4243 | 937 | |
c4ed4243 | 938 | lock_flags |= XFS_ILOCK_EXCL; |
c4ed4243 | 939 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
ddc3415a | 940 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
941 | |
942 | /* | |
943 | * Only change the c/mtime if we are changing the size or we are | |
944 | * explicitly asked to change it. This handles the semantic difference | |
945 | * between truncate() and ftruncate() as implemented in the VFS. | |
946 | * | |
947 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
948 | * special case where we need to update the times despite not having | |
949 | * these flags set. For all other operations the VFS set these flags | |
950 | * explicitly if it wants a timestamp update. | |
951 | */ | |
fe60a8a0 CH |
952 | if (newsize != oldsize && |
953 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 | 954 | iattr->ia_ctime = iattr->ia_mtime = |
c2050a45 | 955 | current_time(inode); |
fe60a8a0 | 956 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
957 | } |
958 | ||
673e8e59 CH |
959 | /* |
960 | * The first thing we do is set the size to new_size permanently on | |
961 | * disk. This way we don't have to worry about anyone ever being able | |
962 | * to look at the data being freed even in the face of a crash. | |
963 | * What we're getting around here is the case where we free a block, it | |
964 | * is allocated to another file, it is written to, and then we crash. | |
965 | * If the new data gets written to the file but the log buffers | |
966 | * containing the free and reallocation don't, then we'd end up with | |
967 | * garbage in the blocks being freed. As long as we make the new size | |
968 | * permanent before actually freeing any blocks it doesn't matter if | |
969 | * they get written to. | |
970 | */ | |
971 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
972 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
973 | ||
974 | if (newsize <= oldsize) { | |
975 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 | 976 | if (error) |
4906e215 | 977 | goto out_trans_cancel; |
c4ed4243 CH |
978 | |
979 | /* | |
980 | * Truncated "down", so we're removing references to old data | |
981 | * here - if we delay flushing for a long time, we expose | |
982 | * ourselves unduly to the notorious NULL files problem. So, | |
983 | * we mark this inode and flush it when the file is closed, | |
984 | * and do not wait the usual (long) time for writeout. | |
985 | */ | |
986 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
987 | |
988 | /* A truncate down always removes post-EOF blocks. */ | |
989 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
990 | } |
991 | ||
fe60a8a0 | 992 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 993 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 994 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 995 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
996 | |
997 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
998 | ||
ff6d6af2 | 999 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
1000 | |
1001 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
1002 | xfs_trans_set_sync(tp); | |
1003 | ||
70393313 | 1004 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
1005 | out_unlock: |
1006 | if (lock_flags) | |
1007 | xfs_iunlock(ip, lock_flags); | |
1008 | return error; | |
1009 | ||
c4ed4243 | 1010 | out_trans_cancel: |
4906e215 | 1011 | xfs_trans_cancel(tp); |
c4ed4243 CH |
1012 | goto out_unlock; |
1013 | } | |
1014 | ||
69bca807 JK |
1015 | int |
1016 | xfs_vn_setattr_size( | |
1017 | struct dentry *dentry, | |
1018 | struct iattr *iattr) | |
1019 | { | |
1020 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
1021 | int error; | |
1022 | ||
1023 | trace_xfs_setattr(ip); | |
1024 | ||
1025 | error = xfs_vn_change_ok(dentry, iattr); | |
1026 | if (error) | |
1027 | return error; | |
1028 | return xfs_setattr_size(ip, iattr); | |
1029 | } | |
1030 | ||
1da177e4 | 1031 | STATIC int |
416c6d5b | 1032 | xfs_vn_setattr( |
76ca4c23 CH |
1033 | struct dentry *dentry, |
1034 | struct iattr *iattr) | |
1da177e4 | 1035 | { |
76ca4c23 CH |
1036 | int error; |
1037 | ||
1038 | if (iattr->ia_valid & ATTR_SIZE) { | |
69eb5fa1 DW |
1039 | struct inode *inode = d_inode(dentry); |
1040 | struct xfs_inode *ip = XFS_I(inode); | |
c63a8eae | 1041 | uint iolock; |
781355c6 | 1042 | |
c63a8eae DW |
1043 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
1044 | iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; | |
781355c6 | 1045 | |
69eb5fa1 | 1046 | error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); |
c63a8eae DW |
1047 | if (error) { |
1048 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); | |
65523218 | 1049 | return error; |
c63a8eae | 1050 | } |
e8e9ad42 | 1051 | |
0c187dc5 | 1052 | error = xfs_vn_setattr_size(dentry, iattr); |
65523218 | 1053 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); |
76ca4c23 | 1054 | } else { |
69bca807 | 1055 | error = xfs_vn_setattr_nonsize(dentry, iattr); |
76ca4c23 CH |
1056 | } |
1057 | ||
2451337d | 1058 | return error; |
1da177e4 LT |
1059 | } |
1060 | ||
69ff2826 CH |
1061 | STATIC int |
1062 | xfs_vn_update_time( | |
1063 | struct inode *inode, | |
95582b00 | 1064 | struct timespec64 *now, |
69ff2826 CH |
1065 | int flags) |
1066 | { | |
1067 | struct xfs_inode *ip = XFS_I(inode); | |
1068 | struct xfs_mount *mp = ip->i_mount; | |
c3b1b131 | 1069 | int log_flags = XFS_ILOG_TIMESTAMP; |
69ff2826 CH |
1070 | struct xfs_trans *tp; |
1071 | int error; | |
1072 | ||
1073 | trace_xfs_update_time(ip); | |
1074 | ||
c3b1b131 CH |
1075 | if (inode->i_sb->s_flags & SB_LAZYTIME) { |
1076 | if (!((flags & S_VERSION) && | |
1077 | inode_maybe_inc_iversion(inode, false))) | |
1078 | return generic_update_time(inode, now, flags); | |
1079 | ||
1080 | /* Capture the iversion update that just occurred */ | |
1081 | log_flags |= XFS_ILOG_CORE; | |
1082 | } | |
1083 | ||
253f4911 CH |
1084 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
1085 | if (error) | |
2451337d | 1086 | return error; |
69ff2826 CH |
1087 | |
1088 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3987848c | 1089 | if (flags & S_CTIME) |
69ff2826 | 1090 | inode->i_ctime = *now; |
3987848c | 1091 | if (flags & S_MTIME) |
69ff2826 | 1092 | inode->i_mtime = *now; |
3987848c | 1093 | if (flags & S_ATIME) |
69ff2826 | 1094 | inode->i_atime = *now; |
3987848c | 1095 | |
69ff2826 | 1096 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
c3b1b131 | 1097 | xfs_trans_log_inode(tp, ip, log_flags); |
70393313 | 1098 | return xfs_trans_commit(tp); |
69ff2826 CH |
1099 | } |
1100 | ||
f35642e2 ES |
1101 | STATIC int |
1102 | xfs_vn_fiemap( | |
1103 | struct inode *inode, | |
1104 | struct fiemap_extent_info *fieinfo, | |
1105 | u64 start, | |
1106 | u64 length) | |
1107 | { | |
f35642e2 ES |
1108 | int error; |
1109 | ||
d2bb140e | 1110 | xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); |
1d4795e7 CH |
1111 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1112 | fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR; | |
1113 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1114 | &xfs_xattr_iomap_ops); | |
1115 | } else { | |
1116 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1117 | &xfs_iomap_ops); | |
1118 | } | |
d2bb140e | 1119 | xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); |
f35642e2 | 1120 | |
d2bb140e | 1121 | return error; |
f35642e2 ES |
1122 | } |
1123 | ||
99b6436b ZYW |
1124 | STATIC int |
1125 | xfs_vn_tmpfile( | |
1126 | struct inode *dir, | |
1127 | struct dentry *dentry, | |
1128 | umode_t mode) | |
1129 | { | |
d540e43b | 1130 | return xfs_generic_create(dir, dentry, mode, 0, true); |
99b6436b ZYW |
1131 | } |
1132 | ||
41be8bed | 1133 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1134 | .get_acl = xfs_get_acl, |
2401dc29 | 1135 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1136 | .getattr = xfs_vn_getattr, |
1137 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1138 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1139 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1140 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1141 | }; |
1142 | ||
41be8bed | 1143 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1144 | .create = xfs_vn_create, |
1145 | .lookup = xfs_vn_lookup, | |
1146 | .link = xfs_vn_link, | |
1147 | .unlink = xfs_vn_unlink, | |
1148 | .symlink = xfs_vn_symlink, | |
1149 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1150 | /* |
1151 | * Yes, XFS uses the same method for rmdir and unlink. | |
1152 | * | |
1153 | * There are some subtile differences deeper in the code, | |
1154 | * but we use S_ISDIR to check for those. | |
1155 | */ | |
1156 | .rmdir = xfs_vn_unlink, | |
416c6d5b | 1157 | .mknod = xfs_vn_mknod, |
2773bf00 | 1158 | .rename = xfs_vn_rename, |
4e34e719 | 1159 | .get_acl = xfs_get_acl, |
2401dc29 | 1160 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1161 | .getattr = xfs_vn_getattr, |
1162 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1163 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1164 | .update_time = xfs_vn_update_time, |
99b6436b | 1165 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1166 | }; |
1167 | ||
41be8bed | 1168 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1169 | .create = xfs_vn_create, |
1170 | .lookup = xfs_vn_ci_lookup, | |
1171 | .link = xfs_vn_link, | |
1172 | .unlink = xfs_vn_unlink, | |
1173 | .symlink = xfs_vn_symlink, | |
1174 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1175 | /* |
1176 | * Yes, XFS uses the same method for rmdir and unlink. | |
1177 | * | |
1178 | * There are some subtile differences deeper in the code, | |
1179 | * but we use S_ISDIR to check for those. | |
1180 | */ | |
1181 | .rmdir = xfs_vn_unlink, | |
384f3ced | 1182 | .mknod = xfs_vn_mknod, |
2773bf00 | 1183 | .rename = xfs_vn_rename, |
4e34e719 | 1184 | .get_acl = xfs_get_acl, |
2401dc29 | 1185 | .set_acl = xfs_set_acl, |
384f3ced BN |
1186 | .getattr = xfs_vn_getattr, |
1187 | .setattr = xfs_vn_setattr, | |
384f3ced | 1188 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1189 | .update_time = xfs_vn_update_time, |
99b6436b | 1190 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1191 | }; |
1192 | ||
41be8bed | 1193 | static const struct inode_operations xfs_symlink_inode_operations = { |
6b255391 | 1194 | .get_link = xfs_vn_get_link, |
416c6d5b NS |
1195 | .getattr = xfs_vn_getattr, |
1196 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1197 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1198 | .update_time = xfs_vn_update_time, |
1da177e4 | 1199 | }; |
41be8bed | 1200 | |
30ee052e | 1201 | static const struct inode_operations xfs_inline_symlink_inode_operations = { |
30ee052e CH |
1202 | .get_link = xfs_vn_get_link_inline, |
1203 | .getattr = xfs_vn_getattr, | |
1204 | .setattr = xfs_vn_setattr, | |
30ee052e CH |
1205 | .listxattr = xfs_vn_listxattr, |
1206 | .update_time = xfs_vn_update_time, | |
1207 | }; | |
1208 | ||
ba23cba9 DW |
1209 | /* Figure out if this file actually supports DAX. */ |
1210 | static bool | |
1211 | xfs_inode_supports_dax( | |
1212 | struct xfs_inode *ip) | |
1213 | { | |
1214 | struct xfs_mount *mp = ip->i_mount; | |
1215 | ||
1216 | /* Only supported on non-reflinked files. */ | |
1217 | if (!S_ISREG(VFS_I(ip)->i_mode) || xfs_is_reflink_inode(ip)) | |
1218 | return false; | |
1219 | ||
1220 | /* DAX mount option or DAX iflag must be set. */ | |
1221 | if (!(mp->m_flags & XFS_MOUNT_DAX) && | |
1222 | !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) | |
1223 | return false; | |
1224 | ||
1225 | /* Block size must match page size */ | |
1226 | if (mp->m_sb.sb_blocksize != PAGE_SIZE) | |
1227 | return false; | |
1228 | ||
1229 | /* Device has to support DAX too. */ | |
1230 | return xfs_find_daxdev_for_inode(VFS_I(ip)) != NULL; | |
1231 | } | |
1232 | ||
41be8bed CH |
1233 | STATIC void |
1234 | xfs_diflags_to_iflags( | |
1235 | struct inode *inode, | |
1236 | struct xfs_inode *ip) | |
1237 | { | |
cbe4dab1 DC |
1238 | uint16_t flags = ip->i_d.di_flags; |
1239 | ||
1240 | inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | | |
1241 | S_NOATIME | S_DAX); | |
1242 | ||
1243 | if (flags & XFS_DIFLAG_IMMUTABLE) | |
41be8bed | 1244 | inode->i_flags |= S_IMMUTABLE; |
cbe4dab1 | 1245 | if (flags & XFS_DIFLAG_APPEND) |
41be8bed | 1246 | inode->i_flags |= S_APPEND; |
cbe4dab1 | 1247 | if (flags & XFS_DIFLAG_SYNC) |
41be8bed | 1248 | inode->i_flags |= S_SYNC; |
cbe4dab1 | 1249 | if (flags & XFS_DIFLAG_NOATIME) |
41be8bed | 1250 | inode->i_flags |= S_NOATIME; |
ba23cba9 | 1251 | if (xfs_inode_supports_dax(ip)) |
cbe4dab1 | 1252 | inode->i_flags |= S_DAX; |
41be8bed CH |
1253 | } |
1254 | ||
1255 | /* | |
2b3d1d41 | 1256 | * Initialize the Linux inode. |
bf904248 | 1257 | * |
58c90473 DC |
1258 | * When reading existing inodes from disk this is called directly from xfs_iget, |
1259 | * when creating a new inode it is called from xfs_ialloc after setting up the | |
1260 | * inode. These callers have different criteria for clearing XFS_INEW, so leave | |
1261 | * it up to the caller to deal with unlocking the inode appropriately. | |
41be8bed CH |
1262 | */ |
1263 | void | |
1264 | xfs_setup_inode( | |
1265 | struct xfs_inode *ip) | |
1266 | { | |
bf904248 | 1267 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1268 | gfp_t gfp_mask; |
bf904248 DC |
1269 | |
1270 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1271 | inode->i_state = I_NEW; |
646ec461 CH |
1272 | |
1273 | inode_sb_list_add(inode); | |
c6f6cd06 | 1274 | /* make the inode look hashed for the writeback code */ |
5bef9151 | 1275 | inode_fake_hash(inode); |
41be8bed | 1276 | |
7aab1b28 DE |
1277 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1278 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed | 1279 | |
41be8bed | 1280 | i_size_write(inode, ip->i_d.di_size); |
41be8bed | 1281 | xfs_diflags_to_iflags(inode, ip); |
41be8bed | 1282 | |
2b3d1d41 | 1283 | if (S_ISDIR(inode->i_mode)) { |
ef215e39 DC |
1284 | /* |
1285 | * We set the i_rwsem class here to avoid potential races with | |
1286 | * lockdep_annotate_inode_mutex_key() reinitialising the lock | |
1287 | * after a filehandle lookup has already found the inode in | |
1288 | * cache before it has been unlocked via unlock_new_inode(). | |
1289 | */ | |
1290 | lockdep_set_class(&inode->i_rwsem, | |
1291 | &inode->i_sb->s_type->i_mutex_dir_key); | |
93a8614e | 1292 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
32c5483a | 1293 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
2b3d1d41 CH |
1294 | } else { |
1295 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; | |
1296 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); | |
41be8bed CH |
1297 | } |
1298 | ||
ad22c7a0 DC |
1299 | /* |
1300 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1301 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1302 | * stacks or deadlocking. | |
1303 | */ | |
1304 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1305 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1306 | ||
510792ee CH |
1307 | /* |
1308 | * If there is no attribute fork no ACL can exist on this inode, | |
1309 | * and it can't have any file capabilities attached to it either. | |
1310 | */ | |
1311 | if (!XFS_IFORK_Q(ip)) { | |
1312 | inode_has_no_xattr(inode); | |
6311b108 | 1313 | cache_no_acl(inode); |
510792ee | 1314 | } |
41be8bed | 1315 | } |
2b3d1d41 CH |
1316 | |
1317 | void | |
1318 | xfs_setup_iops( | |
1319 | struct xfs_inode *ip) | |
1320 | { | |
1321 | struct inode *inode = &ip->i_vnode; | |
1322 | ||
41be8bed CH |
1323 | switch (inode->i_mode & S_IFMT) { |
1324 | case S_IFREG: | |
1325 | inode->i_op = &xfs_inode_operations; | |
1326 | inode->i_fop = &xfs_file_operations; | |
6e2608df DW |
1327 | if (IS_DAX(inode)) |
1328 | inode->i_mapping->a_ops = &xfs_dax_aops; | |
1329 | else | |
1330 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
41be8bed CH |
1331 | break; |
1332 | case S_IFDIR: | |
1333 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
1334 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1335 | else | |
1336 | inode->i_op = &xfs_dir_inode_operations; | |
1337 | inode->i_fop = &xfs_dir_file_operations; | |
1338 | break; | |
1339 | case S_IFLNK: | |
30ee052e CH |
1340 | if (ip->i_df.if_flags & XFS_IFINLINE) |
1341 | inode->i_op = &xfs_inline_symlink_inode_operations; | |
1342 | else | |
1343 | inode->i_op = &xfs_symlink_inode_operations; | |
41be8bed CH |
1344 | break; |
1345 | default: | |
1346 | inode->i_op = &xfs_inode_operations; | |
1347 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1348 | break; | |
1349 | } | |
41be8bed | 1350 | } |