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Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 LT |
18 | #include "xfs.h" |
19 | #include "xfs_fs.h" | |
70a9883c | 20 | #include "xfs_shared.h" |
239880ef DC |
21 | #include "xfs_format.h" |
22 | #include "xfs_log_format.h" | |
23 | #include "xfs_trans_resv.h" | |
1da177e4 | 24 | #include "xfs_mount.h" |
57062787 | 25 | #include "xfs_da_format.h" |
1da177e4 LT |
26 | #include "xfs_inode.h" |
27 | #include "xfs_bmap.h" | |
68988114 | 28 | #include "xfs_bmap_util.h" |
239880ef | 29 | #include "xfs_acl.h" |
239880ef | 30 | #include "xfs_quota.h" |
1da177e4 | 31 | #include "xfs_error.h" |
1da177e4 | 32 | #include "xfs_attr.h" |
239880ef | 33 | #include "xfs_trans.h" |
0b1b213f | 34 | #include "xfs_trace.h" |
27b52867 | 35 | #include "xfs_icache.h" |
c24b5dfa | 36 | #include "xfs_symlink.h" |
0cb97766 | 37 | #include "xfs_da_btree.h" |
1b767ee3 | 38 | #include "xfs_dir2.h" |
99b6436b | 39 | #include "xfs_trans_space.h" |
781355c6 | 40 | #include "xfs_pnfs.h" |
68a9f5e7 | 41 | #include "xfs_iomap.h" |
1da177e4 | 42 | |
16f7e0fe | 43 | #include <linux/capability.h> |
1da177e4 | 44 | #include <linux/xattr.h> |
ef14f0c1 | 45 | #include <linux/posix_acl.h> |
446ada4a | 46 | #include <linux/security.h> |
d2bb140e | 47 | #include <linux/iomap.h> |
5a0e3ad6 | 48 | #include <linux/slab.h> |
1da177e4 | 49 | |
93a8614e DC |
50 | /* |
51 | * Directories have different lock order w.r.t. mmap_sem compared to regular | |
52 | * files. This is due to readdir potentially triggering page faults on a user | |
53 | * buffer inside filldir(), and this happens with the ilock on the directory | |
54 | * held. For regular files, the lock order is the other way around - the | |
55 | * mmap_sem is taken during the page fault, and then we lock the ilock to do | |
56 | * block mapping. Hence we need a different class for the directory ilock so | |
57 | * that lockdep can tell them apart. | |
58 | */ | |
59 | static struct lock_class_key xfs_nondir_ilock_class; | |
60 | static struct lock_class_key xfs_dir_ilock_class; | |
61 | ||
8d2a5e6e DC |
62 | static int |
63 | xfs_initxattrs( | |
64 | struct inode *inode, | |
65 | const struct xattr *xattr_array, | |
66 | void *fs_info) | |
9d8f13ba | 67 | { |
8d2a5e6e DC |
68 | const struct xattr *xattr; |
69 | struct xfs_inode *ip = XFS_I(inode); | |
70 | int error = 0; | |
9d8f13ba MZ |
71 | |
72 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
2451337d | 73 | error = xfs_attr_set(ip, xattr->name, xattr->value, |
a5a14de2 | 74 | xattr->value_len, ATTR_SECURE); |
9d8f13ba MZ |
75 | if (error < 0) |
76 | break; | |
77 | } | |
78 | return error; | |
79 | } | |
80 | ||
446ada4a NS |
81 | /* |
82 | * Hook in SELinux. This is not quite correct yet, what we really need | |
83 | * here (as we do for default ACLs) is a mechanism by which creation of | |
84 | * these attrs can be journalled at inode creation time (along with the | |
85 | * inode, of course, such that log replay can't cause these to be lost). | |
86 | */ | |
9d8f13ba | 87 | |
446ada4a | 88 | STATIC int |
416c6d5b | 89 | xfs_init_security( |
af048193 | 90 | struct inode *inode, |
2a7dba39 EP |
91 | struct inode *dir, |
92 | const struct qstr *qstr) | |
446ada4a | 93 | { |
2451337d | 94 | return security_inode_init_security(inode, dir, qstr, |
a5a14de2 | 95 | &xfs_initxattrs, NULL); |
446ada4a NS |
96 | } |
97 | ||
556b8b16 BN |
98 | static void |
99 | xfs_dentry_to_name( | |
100 | struct xfs_name *namep, | |
0cb97766 DC |
101 | struct dentry *dentry, |
102 | int mode) | |
556b8b16 BN |
103 | { |
104 | namep->name = dentry->d_name.name; | |
105 | namep->len = dentry->d_name.len; | |
0cb97766 | 106 | namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT]; |
556b8b16 BN |
107 | } |
108 | ||
7989cb8e | 109 | STATIC void |
416c6d5b | 110 | xfs_cleanup_inode( |
739bfb2a | 111 | struct inode *dir, |
af048193 | 112 | struct inode *inode, |
8f112e3b | 113 | struct dentry *dentry) |
3a69c7dc | 114 | { |
556b8b16 | 115 | struct xfs_name teardown; |
3a69c7dc YL |
116 | |
117 | /* Oh, the horror. | |
220b5284 | 118 | * If we can't add the ACL or we fail in |
416c6d5b | 119 | * xfs_init_security we must back out. |
3a69c7dc YL |
120 | * ENOSPC can hit here, among other things. |
121 | */ | |
0cb97766 | 122 | xfs_dentry_to_name(&teardown, dentry, 0); |
3a69c7dc | 123 | |
8f112e3b | 124 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
3a69c7dc YL |
125 | } |
126 | ||
1da177e4 | 127 | STATIC int |
d540e43b | 128 | xfs_generic_create( |
1da177e4 LT |
129 | struct inode *dir, |
130 | struct dentry *dentry, | |
1a67aafb | 131 | umode_t mode, |
d540e43b BF |
132 | dev_t rdev, |
133 | bool tmpfile) /* unnamed file */ | |
1da177e4 | 134 | { |
db0bb7ba | 135 | struct inode *inode; |
979ebab1 | 136 | struct xfs_inode *ip = NULL; |
2401dc29 | 137 | struct posix_acl *default_acl, *acl; |
556b8b16 | 138 | struct xfs_name name; |
1da177e4 LT |
139 | int error; |
140 | ||
141 | /* | |
142 | * Irix uses Missed'em'V split, but doesn't want to see | |
143 | * the upper 5 bits of (14bit) major. | |
144 | */ | |
517b5e8c CH |
145 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
146 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) | |
147 | return -EINVAL; | |
148 | rdev = sysv_encode_dev(rdev); | |
149 | } else { | |
150 | rdev = 0; | |
151 | } | |
1da177e4 | 152 | |
2401dc29 CH |
153 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
154 | if (error) | |
155 | return error; | |
1da177e4 | 156 | |
d540e43b BF |
157 | if (!tmpfile) { |
158 | xfs_dentry_to_name(&name, dentry, mode); | |
159 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); | |
160 | } else { | |
161 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); | |
162 | } | |
db0bb7ba CH |
163 | if (unlikely(error)) |
164 | goto out_free_acl; | |
446ada4a | 165 | |
01651646 | 166 | inode = VFS_I(ip); |
979ebab1 | 167 | |
2a7dba39 | 168 | error = xfs_init_security(inode, dir, &dentry->d_name); |
db0bb7ba CH |
169 | if (unlikely(error)) |
170 | goto out_cleanup_inode; | |
171 | ||
2401dc29 | 172 | #ifdef CONFIG_XFS_POSIX_ACL |
db0bb7ba | 173 | if (default_acl) { |
2451337d | 174 | error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
2401dc29 | 175 | if (error) |
db0bb7ba | 176 | goto out_cleanup_inode; |
1da177e4 | 177 | } |
2401dc29 | 178 | if (acl) { |
2451337d | 179 | error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
2401dc29 CH |
180 | if (error) |
181 | goto out_cleanup_inode; | |
182 | } | |
183 | #endif | |
1da177e4 | 184 | |
2b3d1d41 CH |
185 | xfs_setup_iops(ip); |
186 | ||
d540e43b BF |
187 | if (tmpfile) |
188 | d_tmpfile(dentry, inode); | |
189 | else | |
190 | d_instantiate(dentry, inode); | |
191 | ||
58c90473 DC |
192 | xfs_finish_inode_setup(ip); |
193 | ||
2401dc29 CH |
194 | out_free_acl: |
195 | if (default_acl) | |
196 | posix_acl_release(default_acl); | |
197 | if (acl) | |
198 | posix_acl_release(acl); | |
2451337d | 199 | return error; |
db0bb7ba CH |
200 | |
201 | out_cleanup_inode: | |
58c90473 | 202 | xfs_finish_inode_setup(ip); |
d540e43b BF |
203 | if (!tmpfile) |
204 | xfs_cleanup_inode(dir, inode, dentry); | |
205 | iput(inode); | |
2401dc29 | 206 | goto out_free_acl; |
1da177e4 LT |
207 | } |
208 | ||
d540e43b BF |
209 | STATIC int |
210 | xfs_vn_mknod( | |
211 | struct inode *dir, | |
212 | struct dentry *dentry, | |
213 | umode_t mode, | |
214 | dev_t rdev) | |
215 | { | |
216 | return xfs_generic_create(dir, dentry, mode, rdev, false); | |
217 | } | |
218 | ||
1da177e4 | 219 | STATIC int |
416c6d5b | 220 | xfs_vn_create( |
1da177e4 LT |
221 | struct inode *dir, |
222 | struct dentry *dentry, | |
4acdaf27 | 223 | umode_t mode, |
ebfc3b49 | 224 | bool flags) |
1da177e4 | 225 | { |
416c6d5b | 226 | return xfs_vn_mknod(dir, dentry, mode, 0); |
1da177e4 LT |
227 | } |
228 | ||
229 | STATIC int | |
416c6d5b | 230 | xfs_vn_mkdir( |
1da177e4 LT |
231 | struct inode *dir, |
232 | struct dentry *dentry, | |
18bb1db3 | 233 | umode_t mode) |
1da177e4 | 234 | { |
416c6d5b | 235 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
1da177e4 LT |
236 | } |
237 | ||
238 | STATIC struct dentry * | |
416c6d5b | 239 | xfs_vn_lookup( |
1da177e4 LT |
240 | struct inode *dir, |
241 | struct dentry *dentry, | |
00cd8dd3 | 242 | unsigned int flags) |
1da177e4 | 243 | { |
ef1f5e7a | 244 | struct xfs_inode *cip; |
556b8b16 | 245 | struct xfs_name name; |
1da177e4 LT |
246 | int error; |
247 | ||
248 | if (dentry->d_name.len >= MAXNAMELEN) | |
249 | return ERR_PTR(-ENAMETOOLONG); | |
250 | ||
0cb97766 | 251 | xfs_dentry_to_name(&name, dentry, 0); |
384f3ced | 252 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
67fcaa73 | 253 | if (unlikely(error)) { |
2451337d DC |
254 | if (unlikely(error != -ENOENT)) |
255 | return ERR_PTR(error); | |
1da177e4 LT |
256 | d_add(dentry, NULL); |
257 | return NULL; | |
258 | } | |
259 | ||
01651646 | 260 | return d_splice_alias(VFS_I(cip), dentry); |
1da177e4 LT |
261 | } |
262 | ||
384f3ced BN |
263 | STATIC struct dentry * |
264 | xfs_vn_ci_lookup( | |
265 | struct inode *dir, | |
266 | struct dentry *dentry, | |
00cd8dd3 | 267 | unsigned int flags) |
384f3ced BN |
268 | { |
269 | struct xfs_inode *ip; | |
270 | struct xfs_name xname; | |
271 | struct xfs_name ci_name; | |
272 | struct qstr dname; | |
273 | int error; | |
274 | ||
275 | if (dentry->d_name.len >= MAXNAMELEN) | |
276 | return ERR_PTR(-ENAMETOOLONG); | |
277 | ||
0cb97766 | 278 | xfs_dentry_to_name(&xname, dentry, 0); |
384f3ced BN |
279 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
280 | if (unlikely(error)) { | |
2451337d DC |
281 | if (unlikely(error != -ENOENT)) |
282 | return ERR_PTR(error); | |
866d5dc9 BN |
283 | /* |
284 | * call d_add(dentry, NULL) here when d_drop_negative_children | |
285 | * is called in xfs_vn_mknod (ie. allow negative dentries | |
286 | * with CI filesystems). | |
287 | */ | |
384f3ced BN |
288 | return NULL; |
289 | } | |
290 | ||
291 | /* if exact match, just splice and exit */ | |
292 | if (!ci_name.name) | |
01651646 | 293 | return d_splice_alias(VFS_I(ip), dentry); |
384f3ced BN |
294 | |
295 | /* else case-insensitive match... */ | |
296 | dname.name = ci_name.name; | |
297 | dname.len = ci_name.len; | |
e45b590b | 298 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
384f3ced BN |
299 | kmem_free(ci_name.name); |
300 | return dentry; | |
301 | } | |
302 | ||
1da177e4 | 303 | STATIC int |
416c6d5b | 304 | xfs_vn_link( |
1da177e4 LT |
305 | struct dentry *old_dentry, |
306 | struct inode *dir, | |
307 | struct dentry *dentry) | |
308 | { | |
2b0143b5 | 309 | struct inode *inode = d_inode(old_dentry); |
556b8b16 | 310 | struct xfs_name name; |
1da177e4 LT |
311 | int error; |
312 | ||
0cb97766 | 313 | xfs_dentry_to_name(&name, dentry, inode->i_mode); |
1da177e4 | 314 | |
556b8b16 | 315 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
d9424b3c | 316 | if (unlikely(error)) |
2451337d | 317 | return error; |
a3da7896 | 318 | |
7de9c6ee | 319 | ihold(inode); |
a3da7896 CH |
320 | d_instantiate(dentry, inode); |
321 | return 0; | |
1da177e4 LT |
322 | } |
323 | ||
324 | STATIC int | |
416c6d5b | 325 | xfs_vn_unlink( |
1da177e4 LT |
326 | struct inode *dir, |
327 | struct dentry *dentry) | |
328 | { | |
556b8b16 | 329 | struct xfs_name name; |
1da177e4 LT |
330 | int error; |
331 | ||
0cb97766 | 332 | xfs_dentry_to_name(&name, dentry, 0); |
1da177e4 | 333 | |
2b0143b5 | 334 | error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); |
e5700704 CH |
335 | if (error) |
336 | return error; | |
337 | ||
338 | /* | |
339 | * With unlink, the VFS makes the dentry "negative": no inode, | |
340 | * but still hashed. This is incompatible with case-insensitive | |
341 | * mode, so invalidate (unhash) the dentry in CI-mode. | |
342 | */ | |
343 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) | |
344 | d_invalidate(dentry); | |
345 | return 0; | |
1da177e4 LT |
346 | } |
347 | ||
348 | STATIC int | |
416c6d5b | 349 | xfs_vn_symlink( |
1da177e4 LT |
350 | struct inode *dir, |
351 | struct dentry *dentry, | |
352 | const char *symname) | |
353 | { | |
3937be5b CH |
354 | struct inode *inode; |
355 | struct xfs_inode *cip = NULL; | |
556b8b16 | 356 | struct xfs_name name; |
1da177e4 | 357 | int error; |
576b1d67 | 358 | umode_t mode; |
1da177e4 | 359 | |
3e5daf05 | 360 | mode = S_IFLNK | |
ce3b0f8d | 361 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
0cb97766 | 362 | xfs_dentry_to_name(&name, dentry, mode); |
1da177e4 | 363 | |
6c77b0ea | 364 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
3937be5b CH |
365 | if (unlikely(error)) |
366 | goto out; | |
367 | ||
01651646 | 368 | inode = VFS_I(cip); |
3937be5b | 369 | |
2a7dba39 | 370 | error = xfs_init_security(inode, dir, &dentry->d_name); |
3937be5b CH |
371 | if (unlikely(error)) |
372 | goto out_cleanup_inode; | |
373 | ||
2b3d1d41 CH |
374 | xfs_setup_iops(cip); |
375 | ||
3937be5b | 376 | d_instantiate(dentry, inode); |
58c90473 | 377 | xfs_finish_inode_setup(cip); |
3937be5b CH |
378 | return 0; |
379 | ||
380 | out_cleanup_inode: | |
58c90473 | 381 | xfs_finish_inode_setup(cip); |
8f112e3b | 382 | xfs_cleanup_inode(dir, inode, dentry); |
d540e43b | 383 | iput(inode); |
3937be5b | 384 | out: |
2451337d | 385 | return error; |
1da177e4 LT |
386 | } |
387 | ||
1da177e4 | 388 | STATIC int |
416c6d5b | 389 | xfs_vn_rename( |
1da177e4 LT |
390 | struct inode *odir, |
391 | struct dentry *odentry, | |
392 | struct inode *ndir, | |
dbe1b5ca CM |
393 | struct dentry *ndentry, |
394 | unsigned int flags) | |
1da177e4 | 395 | { |
2b0143b5 | 396 | struct inode *new_inode = d_inode(ndentry); |
d31a1825 | 397 | int omode = 0; |
556b8b16 BN |
398 | struct xfs_name oname; |
399 | struct xfs_name nname; | |
1da177e4 | 400 | |
7dcf5c3e | 401 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
dbe1b5ca CM |
402 | return -EINVAL; |
403 | ||
d31a1825 CM |
404 | /* if we are exchanging files, we need to set i_mode of both files */ |
405 | if (flags & RENAME_EXCHANGE) | |
2b0143b5 | 406 | omode = d_inode(ndentry)->i_mode; |
d31a1825 CM |
407 | |
408 | xfs_dentry_to_name(&oname, odentry, omode); | |
2b0143b5 | 409 | xfs_dentry_to_name(&nname, ndentry, d_inode(odentry)->i_mode); |
556b8b16 | 410 | |
2b0143b5 | 411 | return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)), |
dbe1b5ca | 412 | XFS_I(ndir), &nname, |
d31a1825 | 413 | new_inode ? XFS_I(new_inode) : NULL, flags); |
1da177e4 LT |
414 | } |
415 | ||
416 | /* | |
417 | * careful here - this function can get called recursively, so | |
418 | * we need to be very careful about how much stack we use. | |
419 | * uio is kmalloced for this reason... | |
420 | */ | |
680baacb | 421 | STATIC const char * |
6b255391 | 422 | xfs_vn_get_link( |
1da177e4 | 423 | struct dentry *dentry, |
6b255391 | 424 | struct inode *inode, |
fceef393 | 425 | struct delayed_call *done) |
1da177e4 | 426 | { |
1da177e4 | 427 | char *link; |
804c83c3 | 428 | int error = -ENOMEM; |
1da177e4 | 429 | |
6b255391 AV |
430 | if (!dentry) |
431 | return ERR_PTR(-ECHILD); | |
432 | ||
f52720ca | 433 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
804c83c3 CH |
434 | if (!link) |
435 | goto out_err; | |
1da177e4 | 436 | |
2b0143b5 | 437 | error = xfs_readlink(XFS_I(d_inode(dentry)), link); |
804c83c3 CH |
438 | if (unlikely(error)) |
439 | goto out_kfree; | |
1da177e4 | 440 | |
fceef393 AV |
441 | set_delayed_call(done, kfree_link, link); |
442 | return link; | |
804c83c3 CH |
443 | |
444 | out_kfree: | |
445 | kfree(link); | |
446 | out_err: | |
680baacb | 447 | return ERR_PTR(error); |
1da177e4 LT |
448 | } |
449 | ||
30ee052e CH |
450 | STATIC const char * |
451 | xfs_vn_get_link_inline( | |
452 | struct dentry *dentry, | |
453 | struct inode *inode, | |
454 | struct delayed_call *done) | |
455 | { | |
456 | ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE); | |
457 | return XFS_I(inode)->i_df.if_u1.if_data; | |
458 | } | |
459 | ||
1da177e4 | 460 | STATIC int |
416c6d5b | 461 | xfs_vn_getattr( |
c43f4087 CH |
462 | struct vfsmount *mnt, |
463 | struct dentry *dentry, | |
464 | struct kstat *stat) | |
1da177e4 | 465 | { |
2b0143b5 | 466 | struct inode *inode = d_inode(dentry); |
c43f4087 CH |
467 | struct xfs_inode *ip = XFS_I(inode); |
468 | struct xfs_mount *mp = ip->i_mount; | |
469 | ||
cca28fb8 | 470 | trace_xfs_getattr(ip); |
c43f4087 CH |
471 | |
472 | if (XFS_FORCED_SHUTDOWN(mp)) | |
b474c7ae | 473 | return -EIO; |
c43f4087 CH |
474 | |
475 | stat->size = XFS_ISIZE(ip); | |
476 | stat->dev = inode->i_sb->s_dev; | |
c19b3b05 | 477 | stat->mode = inode->i_mode; |
54d7b5c1 | 478 | stat->nlink = inode->i_nlink; |
7aab1b28 DE |
479 | stat->uid = inode->i_uid; |
480 | stat->gid = inode->i_gid; | |
c43f4087 | 481 | stat->ino = ip->i_ino; |
c43f4087 | 482 | stat->atime = inode->i_atime; |
f9581b14 CH |
483 | stat->mtime = inode->i_mtime; |
484 | stat->ctime = inode->i_ctime; | |
c43f4087 CH |
485 | stat->blocks = |
486 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
487 | ||
488 | ||
489 | switch (inode->i_mode & S_IFMT) { | |
490 | case S_IFBLK: | |
491 | case S_IFCHR: | |
492 | stat->blksize = BLKDEV_IOSIZE; | |
493 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
494 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
495 | break; | |
496 | default: | |
71ddabb9 | 497 | if (XFS_IS_REALTIME_INODE(ip)) { |
c43f4087 CH |
498 | /* |
499 | * If the file blocks are being allocated from a | |
500 | * realtime volume, then return the inode's realtime | |
501 | * extent size or the realtime volume's extent size. | |
502 | */ | |
503 | stat->blksize = | |
504 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
505 | } else | |
506 | stat->blksize = xfs_preferred_iosize(mp); | |
507 | stat->rdev = 0; | |
508 | break; | |
69e23b9a | 509 | } |
c43f4087 CH |
510 | |
511 | return 0; | |
1da177e4 LT |
512 | } |
513 | ||
56c19e89 DC |
514 | static void |
515 | xfs_setattr_mode( | |
56c19e89 DC |
516 | struct xfs_inode *ip, |
517 | struct iattr *iattr) | |
518 | { | |
0c3d88df CH |
519 | struct inode *inode = VFS_I(ip); |
520 | umode_t mode = iattr->ia_mode; | |
56c19e89 | 521 | |
56c19e89 DC |
522 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
523 | ||
56c19e89 DC |
524 | inode->i_mode &= S_IFMT; |
525 | inode->i_mode |= mode & ~S_IFMT; | |
526 | } | |
527 | ||
52785112 | 528 | void |
c91c46c1 CH |
529 | xfs_setattr_time( |
530 | struct xfs_inode *ip, | |
531 | struct iattr *iattr) | |
532 | { | |
533 | struct inode *inode = VFS_I(ip); | |
534 | ||
535 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
536 | ||
3987848c | 537 | if (iattr->ia_valid & ATTR_ATIME) |
c91c46c1 | 538 | inode->i_atime = iattr->ia_atime; |
3987848c | 539 | if (iattr->ia_valid & ATTR_CTIME) |
c91c46c1 | 540 | inode->i_ctime = iattr->ia_ctime; |
3987848c | 541 | if (iattr->ia_valid & ATTR_MTIME) |
c91c46c1 | 542 | inode->i_mtime = iattr->ia_mtime; |
c91c46c1 CH |
543 | } |
544 | ||
69bca807 JK |
545 | static int |
546 | xfs_vn_change_ok( | |
547 | struct dentry *dentry, | |
548 | struct iattr *iattr) | |
549 | { | |
31051c85 | 550 | struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; |
69bca807 JK |
551 | |
552 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
553 | return -EROFS; | |
554 | ||
555 | if (XFS_FORCED_SHUTDOWN(mp)) | |
556 | return -EIO; | |
557 | ||
31051c85 | 558 | return setattr_prepare(dentry, iattr); |
69bca807 JK |
559 | } |
560 | ||
561 | /* | |
562 | * Set non-size attributes of an inode. | |
563 | * | |
564 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 565 | * setattr_prepare() or otherwise verifying the change is fine. |
69bca807 | 566 | */ |
c4ed4243 CH |
567 | int |
568 | xfs_setattr_nonsize( | |
569 | struct xfs_inode *ip, | |
570 | struct iattr *iattr, | |
571 | int flags) | |
572 | { | |
573 | xfs_mount_t *mp = ip->i_mount; | |
574 | struct inode *inode = VFS_I(ip); | |
575 | int mask = iattr->ia_valid; | |
576 | xfs_trans_t *tp; | |
577 | int error; | |
7aab1b28 DE |
578 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
579 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; | |
c4ed4243 CH |
580 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
581 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; | |
582 | ||
c4ed4243 CH |
583 | ASSERT((mask & ATTR_SIZE) == 0); |
584 | ||
585 | /* | |
586 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
587 | * before we start any other transactions. Trying to do this later | |
588 | * is messy. We don't care to take a readlock to look at the ids | |
589 | * in inode here, because we can't hold it across the trans_reserve. | |
590 | * If the IDs do change before we take the ilock, we're covered | |
591 | * because the i_*dquot fields will get updated anyway. | |
592 | */ | |
593 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { | |
594 | uint qflags = 0; | |
595 | ||
596 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { | |
597 | uid = iattr->ia_uid; | |
598 | qflags |= XFS_QMOPT_UQUOTA; | |
599 | } else { | |
7aab1b28 | 600 | uid = inode->i_uid; |
c4ed4243 CH |
601 | } |
602 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { | |
603 | gid = iattr->ia_gid; | |
604 | qflags |= XFS_QMOPT_GQUOTA; | |
605 | } else { | |
7aab1b28 | 606 | gid = inode->i_gid; |
c4ed4243 CH |
607 | } |
608 | ||
609 | /* | |
610 | * We take a reference when we initialize udqp and gdqp, | |
611 | * so it is important that we never blindly double trip on | |
612 | * the same variable. See xfs_create() for an example. | |
613 | */ | |
614 | ASSERT(udqp == NULL); | |
615 | ASSERT(gdqp == NULL); | |
7aab1b28 DE |
616 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
617 | xfs_kgid_to_gid(gid), | |
618 | xfs_get_projid(ip), | |
619 | qflags, &udqp, &gdqp, NULL); | |
c4ed4243 CH |
620 | if (error) |
621 | return error; | |
622 | } | |
623 | ||
253f4911 | 624 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
c4ed4243 | 625 | if (error) |
253f4911 | 626 | goto out_dqrele; |
c4ed4243 CH |
627 | |
628 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
253f4911 | 629 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
630 | |
631 | /* | |
632 | * Change file ownership. Must be the owner or privileged. | |
633 | */ | |
634 | if (mask & (ATTR_UID|ATTR_GID)) { | |
635 | /* | |
636 | * These IDs could have changed since we last looked at them. | |
637 | * But, we're assured that if the ownership did change | |
638 | * while we didn't have the inode locked, inode's dquot(s) | |
639 | * would have changed also. | |
640 | */ | |
7aab1b28 DE |
641 | iuid = inode->i_uid; |
642 | igid = inode->i_gid; | |
c4ed4243 CH |
643 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
644 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
645 | ||
646 | /* | |
647 | * Do a quota reservation only if uid/gid is actually | |
648 | * going to change. | |
649 | */ | |
650 | if (XFS_IS_QUOTA_RUNNING(mp) && | |
7aab1b28 DE |
651 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
652 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { | |
c4ed4243 CH |
653 | ASSERT(tp); |
654 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, | |
92f8ff73 | 655 | NULL, capable(CAP_FOWNER) ? |
c4ed4243 CH |
656 | XFS_QMOPT_FORCE_RES : 0); |
657 | if (error) /* out of quota */ | |
253f4911 | 658 | goto out_cancel; |
c4ed4243 CH |
659 | } |
660 | } | |
661 | ||
c4ed4243 CH |
662 | /* |
663 | * Change file ownership. Must be the owner or privileged. | |
664 | */ | |
665 | if (mask & (ATTR_UID|ATTR_GID)) { | |
666 | /* | |
667 | * CAP_FSETID overrides the following restrictions: | |
668 | * | |
669 | * The set-user-ID and set-group-ID bits of a file will be | |
670 | * cleared upon successful return from chown() | |
671 | */ | |
c19b3b05 | 672 | if ((inode->i_mode & (S_ISUID|S_ISGID)) && |
c4ed4243 | 673 | !capable(CAP_FSETID)) |
c19b3b05 | 674 | inode->i_mode &= ~(S_ISUID|S_ISGID); |
c4ed4243 CH |
675 | |
676 | /* | |
677 | * Change the ownerships and register quota modifications | |
678 | * in the transaction. | |
679 | */ | |
7aab1b28 | 680 | if (!uid_eq(iuid, uid)) { |
c4ed4243 CH |
681 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
682 | ASSERT(mask & ATTR_UID); | |
683 | ASSERT(udqp); | |
684 | olddquot1 = xfs_qm_vop_chown(tp, ip, | |
685 | &ip->i_udquot, udqp); | |
686 | } | |
7aab1b28 | 687 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
c4ed4243 CH |
688 | inode->i_uid = uid; |
689 | } | |
7aab1b28 | 690 | if (!gid_eq(igid, gid)) { |
c4ed4243 | 691 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
5a01dd54 JL |
692 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
693 | !XFS_IS_PQUOTA_ON(mp)); | |
c4ed4243 CH |
694 | ASSERT(mask & ATTR_GID); |
695 | ASSERT(gdqp); | |
696 | olddquot2 = xfs_qm_vop_chown(tp, ip, | |
697 | &ip->i_gdquot, gdqp); | |
698 | } | |
7aab1b28 | 699 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
c4ed4243 CH |
700 | inode->i_gid = gid; |
701 | } | |
702 | } | |
703 | ||
56c19e89 | 704 | if (mask & ATTR_MODE) |
0c3d88df | 705 | xfs_setattr_mode(ip, iattr); |
c91c46c1 CH |
706 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
707 | xfs_setattr_time(ip, iattr); | |
c4ed4243 CH |
708 | |
709 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
710 | ||
ff6d6af2 | 711 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
712 | |
713 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
714 | xfs_trans_set_sync(tp); | |
70393313 | 715 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
716 | |
717 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
718 | ||
719 | /* | |
720 | * Release any dquot(s) the inode had kept before chown. | |
721 | */ | |
722 | xfs_qm_dqrele(olddquot1); | |
723 | xfs_qm_dqrele(olddquot2); | |
724 | xfs_qm_dqrele(udqp); | |
725 | xfs_qm_dqrele(gdqp); | |
726 | ||
727 | if (error) | |
b474c7ae | 728 | return error; |
c4ed4243 CH |
729 | |
730 | /* | |
731 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
732 | * update. We could avoid this with linked transactions | |
733 | * and passing down the transaction pointer all the way | |
734 | * to attr_set. No previous user of the generic | |
735 | * Posix ACL code seems to care about this issue either. | |
736 | */ | |
737 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
2451337d | 738 | error = posix_acl_chmod(inode, inode->i_mode); |
c4ed4243 | 739 | if (error) |
b474c7ae | 740 | return error; |
c4ed4243 CH |
741 | } |
742 | ||
743 | return 0; | |
744 | ||
253f4911 | 745 | out_cancel: |
4906e215 | 746 | xfs_trans_cancel(tp); |
253f4911 | 747 | out_dqrele: |
c4ed4243 CH |
748 | xfs_qm_dqrele(udqp); |
749 | xfs_qm_dqrele(gdqp); | |
750 | return error; | |
751 | } | |
752 | ||
69bca807 JK |
753 | int |
754 | xfs_vn_setattr_nonsize( | |
755 | struct dentry *dentry, | |
756 | struct iattr *iattr) | |
757 | { | |
758 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
759 | int error; | |
760 | ||
761 | trace_xfs_setattr(ip); | |
762 | ||
763 | error = xfs_vn_change_ok(dentry, iattr); | |
764 | if (error) | |
765 | return error; | |
766 | return xfs_setattr_nonsize(ip, iattr, 0); | |
767 | } | |
768 | ||
c4ed4243 CH |
769 | /* |
770 | * Truncate file. Must have write permission and not be a directory. | |
69bca807 JK |
771 | * |
772 | * Caution: The caller of this function is responsible for calling | |
31051c85 | 773 | * setattr_prepare() or otherwise verifying the change is fine. |
c4ed4243 CH |
774 | */ |
775 | int | |
776 | xfs_setattr_size( | |
777 | struct xfs_inode *ip, | |
76ca4c23 | 778 | struct iattr *iattr) |
c4ed4243 CH |
779 | { |
780 | struct xfs_mount *mp = ip->i_mount; | |
781 | struct inode *inode = VFS_I(ip); | |
673e8e59 | 782 | xfs_off_t oldsize, newsize; |
c4ed4243 CH |
783 | struct xfs_trans *tp; |
784 | int error; | |
f38996f5 | 785 | uint lock_flags = 0; |
5885ebda | 786 | bool did_zeroing = false; |
c4ed4243 | 787 | |
76ca4c23 | 788 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
e8e9ad42 | 789 | ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); |
c19b3b05 | 790 | ASSERT(S_ISREG(inode->i_mode)); |
fe60a8a0 CH |
791 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
792 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); | |
c4ed4243 | 793 | |
ce7ae151 | 794 | oldsize = inode->i_size; |
673e8e59 CH |
795 | newsize = iattr->ia_size; |
796 | ||
c4ed4243 CH |
797 | /* |
798 | * Short circuit the truncate case for zero length files. | |
799 | */ | |
673e8e59 | 800 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
fe60a8a0 | 801 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
76ca4c23 | 802 | return 0; |
681b1200 CH |
803 | |
804 | /* | |
805 | * Use the regular setattr path to update the timestamps. | |
806 | */ | |
681b1200 CH |
807 | iattr->ia_valid &= ~ATTR_SIZE; |
808 | return xfs_setattr_nonsize(ip, iattr, 0); | |
c4ed4243 CH |
809 | } |
810 | ||
811 | /* | |
812 | * Make sure that the dquots are attached to the inode. | |
813 | */ | |
f38996f5 | 814 | error = xfs_qm_dqattach(ip, 0); |
c4ed4243 | 815 | if (error) |
76ca4c23 | 816 | return error; |
c4ed4243 | 817 | |
f0c6bcba CH |
818 | /* |
819 | * Wait for all direct I/O to complete. | |
820 | */ | |
821 | inode_dio_wait(inode); | |
822 | ||
c4ed4243 | 823 | /* |
5885ebda DC |
824 | * File data changes must be complete before we start the transaction to |
825 | * modify the inode. This needs to be done before joining the inode to | |
826 | * the transaction because the inode cannot be unlocked once it is a | |
827 | * part of the transaction. | |
828 | * | |
f0c6bcba CH |
829 | * Start with zeroing any data beyond EOF that we may expose on file |
830 | * extension, or zeroing out the rest of the block on a downward | |
831 | * truncate. | |
c4ed4243 | 832 | */ |
673e8e59 | 833 | if (newsize > oldsize) { |
5885ebda | 834 | error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing); |
f0c6bcba | 835 | } else { |
459f0fbc CH |
836 | error = iomap_truncate_page(inode, newsize, &did_zeroing, |
837 | &xfs_iomap_ops); | |
c4ed4243 | 838 | } |
c4ed4243 | 839 | |
f0c6bcba CH |
840 | if (error) |
841 | return error; | |
842 | ||
c4ed4243 CH |
843 | /* |
844 | * We are going to log the inode size change in this transaction so | |
845 | * any previous writes that are beyond the on disk EOF and the new | |
846 | * EOF that have not been written out need to be written here. If we | |
847 | * do not write the data out, we expose ourselves to the null files | |
5885ebda DC |
848 | * problem. Note that this includes any block zeroing we did above; |
849 | * otherwise those blocks may not be zeroed after a crash. | |
c4ed4243 | 850 | */ |
68a9f5e7 CH |
851 | if (did_zeroing || |
852 | (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { | |
2451337d | 853 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
4bc1ea6b | 854 | ip->i_d.di_size, newsize); |
c4ed4243 | 855 | if (error) |
76ca4c23 | 856 | return error; |
c4ed4243 CH |
857 | } |
858 | ||
49abc3a8 | 859 | /* |
0f9160b4 DC |
860 | * We've already locked out new page faults, so now we can safely remove |
861 | * pages from the page cache knowing they won't get refaulted until we | |
862 | * drop the XFS_MMAP_EXCL lock after the extent manipulations are | |
863 | * complete. The truncate_setsize() call also cleans partial EOF page | |
864 | * PTEs on extending truncates and hence ensures sub-page block size | |
865 | * filesystems are correctly handled, too. | |
49abc3a8 | 866 | * |
0f9160b4 DC |
867 | * We have to do all the page cache truncate work outside the |
868 | * transaction context as the "lock" order is page lock->log space | |
869 | * reservation as defined by extent allocation in the writeback path. | |
253f4911 | 870 | * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but |
0f9160b4 DC |
871 | * having already truncated the in-memory version of the file (i.e. made |
872 | * user visible changes). There's not much we can do about this, except | |
873 | * to hope that the caller sees ENOMEM and retries the truncate | |
874 | * operation. | |
49abc3a8 | 875 | */ |
49abc3a8 | 876 | truncate_setsize(inode, newsize); |
c4ed4243 | 877 | |
253f4911 | 878 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
c4ed4243 | 879 | if (error) |
253f4911 | 880 | return error; |
c4ed4243 | 881 | |
c4ed4243 | 882 | lock_flags |= XFS_ILOCK_EXCL; |
c4ed4243 | 883 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
ddc3415a | 884 | xfs_trans_ijoin(tp, ip, 0); |
c4ed4243 CH |
885 | |
886 | /* | |
887 | * Only change the c/mtime if we are changing the size or we are | |
888 | * explicitly asked to change it. This handles the semantic difference | |
889 | * between truncate() and ftruncate() as implemented in the VFS. | |
890 | * | |
891 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
892 | * special case where we need to update the times despite not having | |
893 | * these flags set. For all other operations the VFS set these flags | |
894 | * explicitly if it wants a timestamp update. | |
895 | */ | |
fe60a8a0 CH |
896 | if (newsize != oldsize && |
897 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
c4ed4243 | 898 | iattr->ia_ctime = iattr->ia_mtime = |
c2050a45 | 899 | current_time(inode); |
fe60a8a0 | 900 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
c4ed4243 CH |
901 | } |
902 | ||
673e8e59 CH |
903 | /* |
904 | * The first thing we do is set the size to new_size permanently on | |
905 | * disk. This way we don't have to worry about anyone ever being able | |
906 | * to look at the data being freed even in the face of a crash. | |
907 | * What we're getting around here is the case where we free a block, it | |
908 | * is allocated to another file, it is written to, and then we crash. | |
909 | * If the new data gets written to the file but the log buffers | |
910 | * containing the free and reallocation don't, then we'd end up with | |
911 | * garbage in the blocks being freed. As long as we make the new size | |
912 | * permanent before actually freeing any blocks it doesn't matter if | |
913 | * they get written to. | |
914 | */ | |
915 | ip->i_d.di_size = newsize; | |
673e8e59 CH |
916 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
917 | ||
918 | if (newsize <= oldsize) { | |
919 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); | |
c4ed4243 | 920 | if (error) |
4906e215 | 921 | goto out_trans_cancel; |
c4ed4243 CH |
922 | |
923 | /* | |
924 | * Truncated "down", so we're removing references to old data | |
925 | * here - if we delay flushing for a long time, we expose | |
926 | * ourselves unduly to the notorious NULL files problem. So, | |
927 | * we mark this inode and flush it when the file is closed, | |
928 | * and do not wait the usual (long) time for writeout. | |
929 | */ | |
930 | xfs_iflags_set(ip, XFS_ITRUNCATED); | |
27b52867 BF |
931 | |
932 | /* A truncate down always removes post-EOF blocks. */ | |
933 | xfs_inode_clear_eofblocks_tag(ip); | |
c4ed4243 CH |
934 | } |
935 | ||
fe60a8a0 | 936 | if (iattr->ia_valid & ATTR_MODE) |
0c3d88df | 937 | xfs_setattr_mode(ip, iattr); |
fe60a8a0 | 938 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
c91c46c1 | 939 | xfs_setattr_time(ip, iattr); |
c4ed4243 CH |
940 | |
941 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
942 | ||
ff6d6af2 | 943 | XFS_STATS_INC(mp, xs_ig_attrchg); |
c4ed4243 CH |
944 | |
945 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
946 | xfs_trans_set_sync(tp); | |
947 | ||
70393313 | 948 | error = xfs_trans_commit(tp); |
c4ed4243 CH |
949 | out_unlock: |
950 | if (lock_flags) | |
951 | xfs_iunlock(ip, lock_flags); | |
952 | return error; | |
953 | ||
c4ed4243 | 954 | out_trans_cancel: |
4906e215 | 955 | xfs_trans_cancel(tp); |
c4ed4243 CH |
956 | goto out_unlock; |
957 | } | |
958 | ||
69bca807 JK |
959 | int |
960 | xfs_vn_setattr_size( | |
961 | struct dentry *dentry, | |
962 | struct iattr *iattr) | |
963 | { | |
964 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); | |
965 | int error; | |
966 | ||
967 | trace_xfs_setattr(ip); | |
968 | ||
969 | error = xfs_vn_change_ok(dentry, iattr); | |
970 | if (error) | |
971 | return error; | |
972 | return xfs_setattr_size(ip, iattr); | |
973 | } | |
974 | ||
1da177e4 | 975 | STATIC int |
416c6d5b | 976 | xfs_vn_setattr( |
76ca4c23 CH |
977 | struct dentry *dentry, |
978 | struct iattr *iattr) | |
1da177e4 | 979 | { |
76ca4c23 CH |
980 | int error; |
981 | ||
982 | if (iattr->ia_valid & ATTR_SIZE) { | |
69bca807 JK |
983 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
984 | uint iolock = XFS_IOLOCK_EXCL; | |
781355c6 | 985 | |
65523218 CH |
986 | error = xfs_break_layouts(d_inode(dentry), &iolock); |
987 | if (error) | |
988 | return error; | |
e8e9ad42 | 989 | |
65523218 CH |
990 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
991 | error = xfs_setattr_size(ip, iattr); | |
992 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); | |
76ca4c23 | 993 | } else { |
69bca807 | 994 | error = xfs_vn_setattr_nonsize(dentry, iattr); |
76ca4c23 CH |
995 | } |
996 | ||
2451337d | 997 | return error; |
1da177e4 LT |
998 | } |
999 | ||
69ff2826 CH |
1000 | STATIC int |
1001 | xfs_vn_update_time( | |
1002 | struct inode *inode, | |
1003 | struct timespec *now, | |
1004 | int flags) | |
1005 | { | |
1006 | struct xfs_inode *ip = XFS_I(inode); | |
1007 | struct xfs_mount *mp = ip->i_mount; | |
1008 | struct xfs_trans *tp; | |
1009 | int error; | |
1010 | ||
1011 | trace_xfs_update_time(ip); | |
1012 | ||
253f4911 CH |
1013 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
1014 | if (error) | |
2451337d | 1015 | return error; |
69ff2826 CH |
1016 | |
1017 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3987848c | 1018 | if (flags & S_CTIME) |
69ff2826 | 1019 | inode->i_ctime = *now; |
3987848c | 1020 | if (flags & S_MTIME) |
69ff2826 | 1021 | inode->i_mtime = *now; |
3987848c | 1022 | if (flags & S_ATIME) |
69ff2826 | 1023 | inode->i_atime = *now; |
3987848c | 1024 | |
69ff2826 CH |
1025 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1026 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); | |
70393313 | 1027 | return xfs_trans_commit(tp); |
69ff2826 CH |
1028 | } |
1029 | ||
f35642e2 ES |
1030 | STATIC int |
1031 | xfs_vn_fiemap( | |
1032 | struct inode *inode, | |
1033 | struct fiemap_extent_info *fieinfo, | |
1034 | u64 start, | |
1035 | u64 length) | |
1036 | { | |
f35642e2 ES |
1037 | int error; |
1038 | ||
d2bb140e | 1039 | xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); |
1d4795e7 CH |
1040 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1041 | fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR; | |
1042 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1043 | &xfs_xattr_iomap_ops); | |
1044 | } else { | |
1045 | error = iomap_fiemap(inode, fieinfo, start, length, | |
1046 | &xfs_iomap_ops); | |
1047 | } | |
d2bb140e | 1048 | xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); |
f35642e2 | 1049 | |
d2bb140e | 1050 | return error; |
f35642e2 ES |
1051 | } |
1052 | ||
99b6436b ZYW |
1053 | STATIC int |
1054 | xfs_vn_tmpfile( | |
1055 | struct inode *dir, | |
1056 | struct dentry *dentry, | |
1057 | umode_t mode) | |
1058 | { | |
d540e43b | 1059 | return xfs_generic_create(dir, dentry, mode, 0, true); |
99b6436b ZYW |
1060 | } |
1061 | ||
41be8bed | 1062 | static const struct inode_operations xfs_inode_operations = { |
4e34e719 | 1063 | .get_acl = xfs_get_acl, |
2401dc29 | 1064 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1065 | .getattr = xfs_vn_getattr, |
1066 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1067 | .listxattr = xfs_vn_listxattr, |
f35642e2 | 1068 | .fiemap = xfs_vn_fiemap, |
69ff2826 | 1069 | .update_time = xfs_vn_update_time, |
1da177e4 LT |
1070 | }; |
1071 | ||
41be8bed | 1072 | static const struct inode_operations xfs_dir_inode_operations = { |
416c6d5b NS |
1073 | .create = xfs_vn_create, |
1074 | .lookup = xfs_vn_lookup, | |
1075 | .link = xfs_vn_link, | |
1076 | .unlink = xfs_vn_unlink, | |
1077 | .symlink = xfs_vn_symlink, | |
1078 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1079 | /* |
1080 | * Yes, XFS uses the same method for rmdir and unlink. | |
1081 | * | |
1082 | * There are some subtile differences deeper in the code, | |
1083 | * but we use S_ISDIR to check for those. | |
1084 | */ | |
1085 | .rmdir = xfs_vn_unlink, | |
416c6d5b | 1086 | .mknod = xfs_vn_mknod, |
2773bf00 | 1087 | .rename = xfs_vn_rename, |
4e34e719 | 1088 | .get_acl = xfs_get_acl, |
2401dc29 | 1089 | .set_acl = xfs_set_acl, |
416c6d5b NS |
1090 | .getattr = xfs_vn_getattr, |
1091 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1092 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1093 | .update_time = xfs_vn_update_time, |
99b6436b | 1094 | .tmpfile = xfs_vn_tmpfile, |
1da177e4 LT |
1095 | }; |
1096 | ||
41be8bed | 1097 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
384f3ced BN |
1098 | .create = xfs_vn_create, |
1099 | .lookup = xfs_vn_ci_lookup, | |
1100 | .link = xfs_vn_link, | |
1101 | .unlink = xfs_vn_unlink, | |
1102 | .symlink = xfs_vn_symlink, | |
1103 | .mkdir = xfs_vn_mkdir, | |
8f112e3b CH |
1104 | /* |
1105 | * Yes, XFS uses the same method for rmdir and unlink. | |
1106 | * | |
1107 | * There are some subtile differences deeper in the code, | |
1108 | * but we use S_ISDIR to check for those. | |
1109 | */ | |
1110 | .rmdir = xfs_vn_unlink, | |
384f3ced | 1111 | .mknod = xfs_vn_mknod, |
2773bf00 | 1112 | .rename = xfs_vn_rename, |
4e34e719 | 1113 | .get_acl = xfs_get_acl, |
2401dc29 | 1114 | .set_acl = xfs_set_acl, |
384f3ced BN |
1115 | .getattr = xfs_vn_getattr, |
1116 | .setattr = xfs_vn_setattr, | |
384f3ced | 1117 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1118 | .update_time = xfs_vn_update_time, |
99b6436b | 1119 | .tmpfile = xfs_vn_tmpfile, |
384f3ced BN |
1120 | }; |
1121 | ||
41be8bed | 1122 | static const struct inode_operations xfs_symlink_inode_operations = { |
1da177e4 | 1123 | .readlink = generic_readlink, |
6b255391 | 1124 | .get_link = xfs_vn_get_link, |
416c6d5b NS |
1125 | .getattr = xfs_vn_getattr, |
1126 | .setattr = xfs_vn_setattr, | |
416c6d5b | 1127 | .listxattr = xfs_vn_listxattr, |
69ff2826 | 1128 | .update_time = xfs_vn_update_time, |
1da177e4 | 1129 | }; |
41be8bed | 1130 | |
30ee052e CH |
1131 | static const struct inode_operations xfs_inline_symlink_inode_operations = { |
1132 | .readlink = generic_readlink, | |
1133 | .get_link = xfs_vn_get_link_inline, | |
1134 | .getattr = xfs_vn_getattr, | |
1135 | .setattr = xfs_vn_setattr, | |
30ee052e CH |
1136 | .listxattr = xfs_vn_listxattr, |
1137 | .update_time = xfs_vn_update_time, | |
1138 | }; | |
1139 | ||
41be8bed CH |
1140 | STATIC void |
1141 | xfs_diflags_to_iflags( | |
1142 | struct inode *inode, | |
1143 | struct xfs_inode *ip) | |
1144 | { | |
cbe4dab1 DC |
1145 | uint16_t flags = ip->i_d.di_flags; |
1146 | ||
1147 | inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | | |
1148 | S_NOATIME | S_DAX); | |
1149 | ||
1150 | if (flags & XFS_DIFLAG_IMMUTABLE) | |
41be8bed | 1151 | inode->i_flags |= S_IMMUTABLE; |
cbe4dab1 | 1152 | if (flags & XFS_DIFLAG_APPEND) |
41be8bed | 1153 | inode->i_flags |= S_APPEND; |
cbe4dab1 | 1154 | if (flags & XFS_DIFLAG_SYNC) |
41be8bed | 1155 | inode->i_flags |= S_SYNC; |
cbe4dab1 | 1156 | if (flags & XFS_DIFLAG_NOATIME) |
41be8bed | 1157 | inode->i_flags |= S_NOATIME; |
db10c697 | 1158 | if (S_ISREG(inode->i_mode) && |
64485437 | 1159 | ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE && |
4f435ebe | 1160 | !xfs_is_reflink_inode(ip) && |
db10c697 DC |
1161 | (ip->i_mount->m_flags & XFS_MOUNT_DAX || |
1162 | ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) | |
cbe4dab1 | 1163 | inode->i_flags |= S_DAX; |
41be8bed CH |
1164 | } |
1165 | ||
1166 | /* | |
2b3d1d41 | 1167 | * Initialize the Linux inode. |
bf904248 | 1168 | * |
58c90473 DC |
1169 | * When reading existing inodes from disk this is called directly from xfs_iget, |
1170 | * when creating a new inode it is called from xfs_ialloc after setting up the | |
1171 | * inode. These callers have different criteria for clearing XFS_INEW, so leave | |
1172 | * it up to the caller to deal with unlocking the inode appropriately. | |
41be8bed CH |
1173 | */ |
1174 | void | |
1175 | xfs_setup_inode( | |
1176 | struct xfs_inode *ip) | |
1177 | { | |
bf904248 | 1178 | struct inode *inode = &ip->i_vnode; |
ad22c7a0 | 1179 | gfp_t gfp_mask; |
bf904248 DC |
1180 | |
1181 | inode->i_ino = ip->i_ino; | |
eaff8079 | 1182 | inode->i_state = I_NEW; |
646ec461 CH |
1183 | |
1184 | inode_sb_list_add(inode); | |
c6f6cd06 CH |
1185 | /* make the inode look hashed for the writeback code */ |
1186 | hlist_add_fake(&inode->i_hash); | |
41be8bed | 1187 | |
7aab1b28 DE |
1188 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
1189 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); | |
41be8bed CH |
1190 | |
1191 | switch (inode->i_mode & S_IFMT) { | |
1192 | case S_IFBLK: | |
1193 | case S_IFCHR: | |
1194 | inode->i_rdev = | |
1195 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
1196 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
1197 | break; | |
1198 | default: | |
1199 | inode->i_rdev = 0; | |
1200 | break; | |
1201 | } | |
1202 | ||
41be8bed | 1203 | i_size_write(inode, ip->i_d.di_size); |
41be8bed | 1204 | xfs_diflags_to_iflags(inode, ip); |
41be8bed | 1205 | |
2b3d1d41 | 1206 | if (S_ISDIR(inode->i_mode)) { |
93a8614e | 1207 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
32c5483a | 1208 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
2b3d1d41 CH |
1209 | } else { |
1210 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; | |
1211 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); | |
41be8bed CH |
1212 | } |
1213 | ||
ad22c7a0 DC |
1214 | /* |
1215 | * Ensure all page cache allocations are done from GFP_NOFS context to | |
1216 | * prevent direct reclaim recursion back into the filesystem and blowing | |
1217 | * stacks or deadlocking. | |
1218 | */ | |
1219 | gfp_mask = mapping_gfp_mask(inode->i_mapping); | |
1220 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); | |
1221 | ||
510792ee CH |
1222 | /* |
1223 | * If there is no attribute fork no ACL can exist on this inode, | |
1224 | * and it can't have any file capabilities attached to it either. | |
1225 | */ | |
1226 | if (!XFS_IFORK_Q(ip)) { | |
1227 | inode_has_no_xattr(inode); | |
6311b108 | 1228 | cache_no_acl(inode); |
510792ee | 1229 | } |
41be8bed | 1230 | } |
2b3d1d41 CH |
1231 | |
1232 | void | |
1233 | xfs_setup_iops( | |
1234 | struct xfs_inode *ip) | |
1235 | { | |
1236 | struct inode *inode = &ip->i_vnode; | |
1237 | ||
41be8bed CH |
1238 | switch (inode->i_mode & S_IFMT) { |
1239 | case S_IFREG: | |
1240 | inode->i_op = &xfs_inode_operations; | |
1241 | inode->i_fop = &xfs_file_operations; | |
1242 | inode->i_mapping->a_ops = &xfs_address_space_operations; | |
1243 | break; | |
1244 | case S_IFDIR: | |
1245 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) | |
1246 | inode->i_op = &xfs_dir_ci_inode_operations; | |
1247 | else | |
1248 | inode->i_op = &xfs_dir_inode_operations; | |
1249 | inode->i_fop = &xfs_dir_file_operations; | |
1250 | break; | |
1251 | case S_IFLNK: | |
30ee052e CH |
1252 | if (ip->i_df.if_flags & XFS_IFINLINE) |
1253 | inode->i_op = &xfs_inline_symlink_inode_operations; | |
1254 | else | |
1255 | inode->i_op = &xfs_symlink_inode_operations; | |
41be8bed CH |
1256 | break; |
1257 | default: | |
1258 | inode->i_op = &xfs_inode_operations; | |
1259 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1260 | break; | |
1261 | } | |
41be8bed | 1262 | } |