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ee154f01 BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright (c) 2011, Lawrence Livermore National Security, LLC. | |
5475aada | 23 | * Copyright (c) 2015 by Chunwei Chen. All rights reserved. |
ee154f01 BB |
24 | */ |
25 | ||
26 | ||
278bee93 | 27 | #include <sys/zfs_ctldir.h> |
ee154f01 BB |
28 | #include <sys/zfs_vfsops.h> |
29 | #include <sys/zfs_vnops.h> | |
ebe7e575 | 30 | #include <sys/zfs_znode.h> |
24ef51f6 | 31 | #include <sys/dmu_objset.h> |
ee154f01 BB |
32 | #include <sys/vfs.h> |
33 | #include <sys/zpl.h> | |
9d36cdb6 | 34 | #include <sys/file.h> |
ee154f01 BB |
35 | |
36 | ||
37 | static struct dentry * | |
8f195a90 | 38 | #ifdef HAVE_LOOKUP_NAMEIDATA |
ee154f01 | 39 | zpl_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
8f195a90 YS |
40 | #else |
41 | zpl_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) | |
42 | #endif | |
ee154f01 | 43 | { |
81e97e21 | 44 | cred_t *cr = CRED(); |
ee154f01 | 45 | struct inode *ip; |
ee154f01 | 46 | int error; |
40d06e3c | 47 | fstrans_cookie_t cookie; |
c5d02870 RS |
48 | pathname_t *ppn = NULL; |
49 | pathname_t pn; | |
9d36cdb6 | 50 | int zfs_flags = 0; |
0037b49e | 51 | zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info; |
ee154f01 | 52 | |
d6df043c | 53 | if (dlen(dentry) >= ZAP_MAXNAMELEN) |
d1d7e268 | 54 | return (ERR_PTR(-ENAMETOOLONG)); |
9878a89d | 55 | |
81e97e21 | 56 | crhold(cr); |
40d06e3c | 57 | cookie = spl_fstrans_mark(); |
c5d02870 RS |
58 | |
59 | /* If we are a case insensitive fs, we need the real name */ | |
0037b49e | 60 | if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) { |
9d36cdb6 | 61 | zfs_flags = FIGNORECASE; |
da5e151f | 62 | pn_alloc(&pn); |
c5d02870 RS |
63 | ppn = &pn; |
64 | } | |
65 | ||
9d36cdb6 | 66 | error = -zfs_lookup(dir, dname(dentry), &ip, zfs_flags, cr, NULL, ppn); |
40d06e3c | 67 | spl_fstrans_unmark(cookie); |
ee154f01 | 68 | ASSERT3S(error, <=, 0); |
81e97e21 | 69 | crfree(cr); |
ee154f01 | 70 | |
7b3e34ba BB |
71 | spin_lock(&dentry->d_lock); |
72 | dentry->d_time = jiffies; | |
ee930353 BB |
73 | #ifndef HAVE_S_D_OP |
74 | d_set_d_op(dentry, &zpl_dentry_operations); | |
75 | #endif /* HAVE_S_D_OP */ | |
7b3e34ba BB |
76 | spin_unlock(&dentry->d_lock); |
77 | ||
ee154f01 | 78 | if (error) { |
9d36cdb6 RS |
79 | /* |
80 | * If we have a case sensitive fs, we do not want to | |
81 | * insert negative entries, so return NULL for ENOENT. | |
82 | * Fall through if the error is not ENOENT. Also free memory. | |
83 | */ | |
84 | if (ppn) { | |
da5e151f | 85 | pn_free(ppn); |
9d36cdb6 RS |
86 | if (error == -ENOENT) |
87 | return (NULL); | |
88 | } | |
89 | ||
ee154f01 | 90 | if (error == -ENOENT) |
d1d7e268 | 91 | return (d_splice_alias(NULL, dentry)); |
ee154f01 | 92 | else |
d1d7e268 | 93 | return (ERR_PTR(error)); |
ee154f01 BB |
94 | } |
95 | ||
c5d02870 RS |
96 | /* |
97 | * If we are case insensitive, call the correct function | |
98 | * to install the name. | |
99 | */ | |
100 | if (ppn) { | |
101 | struct dentry *new_dentry; | |
102 | struct qstr ci_name; | |
103 | ||
d5b897a6 | 104 | if (strcmp(dname(dentry), pn.pn_buf) == 0) { |
105 | new_dentry = d_splice_alias(ip, dentry); | |
106 | } else { | |
107 | ci_name.name = pn.pn_buf; | |
108 | ci_name.len = strlen(pn.pn_buf); | |
109 | new_dentry = d_add_ci(dentry, ip, &ci_name); | |
110 | } | |
da5e151f | 111 | pn_free(ppn); |
c5d02870 RS |
112 | return (new_dentry); |
113 | } else { | |
114 | return (d_splice_alias(ip, dentry)); | |
115 | } | |
ee154f01 BB |
116 | } |
117 | ||
ebe7e575 | 118 | void |
7b3e34ba | 119 | zpl_vap_init(vattr_t *vap, struct inode *dir, zpl_umode_t mode, cred_t *cr) |
9fd91dae BB |
120 | { |
121 | vap->va_mask = ATTR_MODE; | |
122 | vap->va_mode = mode; | |
9fd91dae BB |
123 | vap->va_uid = crgetfsuid(cr); |
124 | ||
125 | if (dir && dir->i_mode & S_ISGID) { | |
570d6edf | 126 | vap->va_gid = KGID_TO_SGID(dir->i_gid); |
9fd91dae BB |
127 | if (S_ISDIR(mode)) |
128 | vap->va_mode |= S_ISGID; | |
129 | } else { | |
130 | vap->va_gid = crgetfsgid(cr); | |
131 | } | |
132 | } | |
133 | ||
ee154f01 | 134 | static int |
558ef6d0 | 135 | #ifdef HAVE_CREATE_NAMEIDATA |
b39d3b9f | 136 | zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, |
ee154f01 | 137 | struct nameidata *nd) |
558ef6d0 YS |
138 | #else |
139 | zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, | |
140 | bool flag) | |
141 | #endif | |
ee154f01 | 142 | { |
81e97e21 | 143 | cred_t *cr = CRED(); |
ee154f01 BB |
144 | struct inode *ip; |
145 | vattr_t *vap; | |
146 | int error; | |
40d06e3c | 147 | fstrans_cookie_t cookie; |
ee154f01 | 148 | |
81e97e21 | 149 | crhold(cr); |
d1d7e268 | 150 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 151 | zpl_vap_init(vap, dir, mode, cr); |
ee154f01 | 152 | |
40d06e3c | 153 | cookie = spl_fstrans_mark(); |
e89260a1 BB |
154 | error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL); |
155 | if (error == 0) { | |
7b3e34ba | 156 | d_instantiate(dentry, ip); |
214806c7 DL |
157 | |
158 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
159 | if (error == 0) | |
160 | error = zpl_init_acl(ip, dir); | |
161 | ||
162 | if (error) | |
da5e151f | 163 | (void) zfs_remove(dir, dname(dentry), cr, 0); |
e89260a1 BB |
164 | } |
165 | ||
a438ff0e | 166 | spl_fstrans_unmark(cookie); |
d1d7e268 | 167 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 168 | crfree(cr); |
ee154f01 BB |
169 | ASSERT3S(error, <=, 0); |
170 | ||
171 | return (error); | |
172 | } | |
173 | ||
174 | static int | |
b39d3b9f BB |
175 | zpl_mknod(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, |
176 | dev_t rdev) | |
ee154f01 | 177 | { |
81e97e21 | 178 | cred_t *cr = CRED(); |
ee154f01 BB |
179 | struct inode *ip; |
180 | vattr_t *vap; | |
181 | int error; | |
40d06e3c | 182 | fstrans_cookie_t cookie; |
ee154f01 | 183 | |
aa6d8c10 NB |
184 | /* |
185 | * We currently expect Linux to supply rdev=0 for all sockets | |
186 | * and fifos, but we want to know if this behavior ever changes. | |
187 | */ | |
188 | if (S_ISSOCK(mode) || S_ISFIFO(mode)) | |
189 | ASSERT(rdev == 0); | |
190 | ||
81e97e21 | 191 | crhold(cr); |
d1d7e268 | 192 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 193 | zpl_vap_init(vap, dir, mode, cr); |
ee154f01 | 194 | vap->va_rdev = rdev; |
ee154f01 | 195 | |
40d06e3c | 196 | cookie = spl_fstrans_mark(); |
7b3e34ba | 197 | error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL); |
023699cd | 198 | if (error == 0) { |
7b3e34ba | 199 | d_instantiate(dentry, ip); |
214806c7 DL |
200 | |
201 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
202 | if (error == 0) | |
203 | error = zpl_init_acl(ip, dir); | |
204 | ||
205 | if (error) | |
da5e151f | 206 | (void) zfs_remove(dir, dname(dentry), cr, 0); |
023699cd | 207 | } |
7b3e34ba | 208 | |
a438ff0e | 209 | spl_fstrans_unmark(cookie); |
d1d7e268 | 210 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 211 | crfree(cr); |
ee154f01 BB |
212 | ASSERT3S(error, <=, 0); |
213 | ||
34d5a5fd | 214 | return (error); |
ee154f01 BB |
215 | } |
216 | ||
ace1eae8 CC |
217 | #ifdef HAVE_TMPFILE |
218 | static int | |
219 | zpl_tmpfile(struct inode *dir, struct dentry *dentry, zpl_umode_t mode) | |
220 | { | |
221 | cred_t *cr = CRED(); | |
222 | struct inode *ip; | |
223 | vattr_t *vap; | |
224 | int error; | |
225 | fstrans_cookie_t cookie; | |
226 | ||
227 | crhold(cr); | |
228 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); | |
229 | zpl_vap_init(vap, dir, mode, cr); | |
230 | ||
231 | cookie = spl_fstrans_mark(); | |
232 | error = -zfs_tmpfile(dir, vap, 0, mode, &ip, cr, 0, NULL); | |
233 | if (error == 0) { | |
234 | /* d_tmpfile will do drop_nlink, so we should set it first */ | |
235 | set_nlink(ip, 1); | |
236 | d_tmpfile(dentry, ip); | |
237 | ||
238 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
239 | if (error == 0) | |
240 | error = zpl_init_acl(ip, dir); | |
241 | /* | |
242 | * don't need to handle error here, file is already in | |
243 | * unlinked set. | |
244 | */ | |
245 | } | |
246 | ||
247 | spl_fstrans_unmark(cookie); | |
248 | kmem_free(vap, sizeof (vattr_t)); | |
249 | crfree(cr); | |
250 | ASSERT3S(error, <=, 0); | |
251 | ||
252 | return (error); | |
253 | } | |
254 | #endif | |
255 | ||
ee154f01 BB |
256 | static int |
257 | zpl_unlink(struct inode *dir, struct dentry *dentry) | |
258 | { | |
81e97e21 | 259 | cred_t *cr = CRED(); |
ee154f01 | 260 | int error; |
40d06e3c | 261 | fstrans_cookie_t cookie; |
0037b49e | 262 | zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info; |
ee154f01 | 263 | |
81e97e21 | 264 | crhold(cr); |
40d06e3c | 265 | cookie = spl_fstrans_mark(); |
da5e151f | 266 | error = -zfs_remove(dir, dname(dentry), cr, 0); |
9d36cdb6 RS |
267 | |
268 | /* | |
269 | * For a CI FS we must invalidate the dentry to prevent the | |
270 | * creation of negative entries. | |
271 | */ | |
0037b49e | 272 | if (error == 0 && zfsvfs->z_case == ZFS_CASE_INSENSITIVE) |
9d36cdb6 RS |
273 | d_invalidate(dentry); |
274 | ||
40d06e3c | 275 | spl_fstrans_unmark(cookie); |
81e97e21 | 276 | crfree(cr); |
ee154f01 BB |
277 | ASSERT3S(error, <=, 0); |
278 | ||
279 | return (error); | |
280 | } | |
281 | ||
282 | static int | |
b39d3b9f | 283 | zpl_mkdir(struct inode *dir, struct dentry *dentry, zpl_umode_t mode) |
ee154f01 | 284 | { |
81e97e21 | 285 | cred_t *cr = CRED(); |
ee154f01 BB |
286 | vattr_t *vap; |
287 | struct inode *ip; | |
288 | int error; | |
40d06e3c | 289 | fstrans_cookie_t cookie; |
ee154f01 | 290 | |
81e97e21 | 291 | crhold(cr); |
d1d7e268 | 292 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 293 | zpl_vap_init(vap, dir, mode | S_IFDIR, cr); |
ee154f01 | 294 | |
40d06e3c | 295 | cookie = spl_fstrans_mark(); |
ee154f01 | 296 | error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL); |
023699cd | 297 | if (error == 0) { |
7b3e34ba | 298 | d_instantiate(dentry, ip); |
214806c7 DL |
299 | |
300 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
301 | if (error == 0) | |
302 | error = zpl_init_acl(ip, dir); | |
303 | ||
304 | if (error) | |
305 | (void) zfs_rmdir(dir, dname(dentry), NULL, cr, 0); | |
023699cd | 306 | } |
7b3e34ba | 307 | |
a438ff0e | 308 | spl_fstrans_unmark(cookie); |
d1d7e268 | 309 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 310 | crfree(cr); |
ee154f01 BB |
311 | ASSERT3S(error, <=, 0); |
312 | ||
313 | return (error); | |
314 | } | |
315 | ||
316 | static int | |
02730c33 | 317 | zpl_rmdir(struct inode *dir, struct dentry *dentry) |
ee154f01 | 318 | { |
81e97e21 | 319 | cred_t *cr = CRED(); |
ee154f01 | 320 | int error; |
40d06e3c | 321 | fstrans_cookie_t cookie; |
0037b49e | 322 | zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info; |
ee154f01 | 323 | |
81e97e21 | 324 | crhold(cr); |
40d06e3c | 325 | cookie = spl_fstrans_mark(); |
ee154f01 | 326 | error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0); |
9d36cdb6 RS |
327 | |
328 | /* | |
329 | * For a CI FS we must invalidate the dentry to prevent the | |
330 | * creation of negative entries. | |
331 | */ | |
0037b49e | 332 | if (error == 0 && zfsvfs->z_case == ZFS_CASE_INSENSITIVE) |
9d36cdb6 RS |
333 | d_invalidate(dentry); |
334 | ||
40d06e3c | 335 | spl_fstrans_unmark(cookie); |
81e97e21 | 336 | crfree(cr); |
ee154f01 BB |
337 | ASSERT3S(error, <=, 0); |
338 | ||
339 | return (error); | |
340 | } | |
341 | ||
342 | static int | |
a3478c07 OF |
343 | zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask, |
344 | unsigned int query_flags) | |
ee154f01 | 345 | { |
ee154f01 | 346 | int error; |
40d06e3c | 347 | fstrans_cookie_t cookie; |
ee154f01 | 348 | |
40d06e3c | 349 | cookie = spl_fstrans_mark(); |
a3478c07 OF |
350 | |
351 | /* | |
352 | * XXX request_mask and query_flags currently ignored. | |
353 | */ | |
354 | ||
355 | error = -zfs_getattr_fast(path->dentry->d_inode, stat); | |
40d06e3c | 356 | spl_fstrans_unmark(cookie); |
ee154f01 BB |
357 | ASSERT3S(error, <=, 0); |
358 | ||
359 | return (error); | |
360 | } | |
a3478c07 | 361 | ZPL_GETATTR_WRAPPER(zpl_getattr); |
ee154f01 BB |
362 | |
363 | static int | |
5484965a | 364 | zpl_setattr(struct dentry *dentry, struct iattr *ia) |
ee154f01 | 365 | { |
023699cd | 366 | struct inode *ip = dentry->d_inode; |
81e97e21 | 367 | cred_t *cr = CRED(); |
5484965a | 368 | vattr_t *vap; |
ee154f01 | 369 | int error; |
40d06e3c | 370 | fstrans_cookie_t cookie; |
ee154f01 | 371 | |
3b0ba3ba | 372 | error = setattr_prepare(dentry, ia); |
ee154f01 BB |
373 | if (error) |
374 | return (error); | |
375 | ||
81e97e21 | 376 | crhold(cr); |
d1d7e268 | 377 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
5484965a BB |
378 | vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK; |
379 | vap->va_mode = ia->ia_mode; | |
570d6edf RY |
380 | vap->va_uid = KUID_TO_SUID(ia->ia_uid); |
381 | vap->va_gid = KGID_TO_SGID(ia->ia_gid); | |
5484965a BB |
382 | vap->va_size = ia->ia_size; |
383 | vap->va_atime = ia->ia_atime; | |
384 | vap->va_mtime = ia->ia_mtime; | |
385 | vap->va_ctime = ia->ia_ctime; | |
386 | ||
6413c95f BB |
387 | if (vap->va_mask & ATTR_ATIME) { |
388 | ip->i_atime = zpl_inode_timespec_trunc(ia->ia_atime, | |
02730c33 | 389 | ip->i_sb->s_time_gran); |
6413c95f | 390 | } |
704cd075 | 391 | |
40d06e3c | 392 | cookie = spl_fstrans_mark(); |
023699cd MM |
393 | error = -zfs_setattr(ip, vap, 0, cr); |
394 | if (!error && (ia->ia_valid & ATTR_MODE)) | |
395 | error = zpl_chmod_acl(ip); | |
5484965a | 396 | |
a438ff0e | 397 | spl_fstrans_unmark(cookie); |
d1d7e268 | 398 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 399 | crfree(cr); |
ee154f01 BB |
400 | ASSERT3S(error, <=, 0); |
401 | ||
5484965a | 402 | return (error); |
ee154f01 BB |
403 | } |
404 | ||
405 | static int | |
b8d9e264 CC |
406 | zpl_rename2(struct inode *sdip, struct dentry *sdentry, |
407 | struct inode *tdip, struct dentry *tdentry, unsigned int flags) | |
ee154f01 | 408 | { |
81e97e21 | 409 | cred_t *cr = CRED(); |
ee154f01 | 410 | int error; |
40d06e3c | 411 | fstrans_cookie_t cookie; |
ee154f01 | 412 | |
b8d9e264 CC |
413 | /* We don't have renameat2(2) support */ |
414 | if (flags) | |
415 | return (-EINVAL); | |
416 | ||
81e97e21 | 417 | crhold(cr); |
40d06e3c | 418 | cookie = spl_fstrans_mark(); |
ee154f01 | 419 | error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0); |
40d06e3c | 420 | spl_fstrans_unmark(cookie); |
81e97e21 | 421 | crfree(cr); |
ee154f01 BB |
422 | ASSERT3S(error, <=, 0); |
423 | ||
424 | return (error); | |
425 | } | |
426 | ||
b8d9e264 CC |
427 | #ifndef HAVE_RENAME_WANTS_FLAGS |
428 | static int | |
429 | zpl_rename(struct inode *sdip, struct dentry *sdentry, | |
430 | struct inode *tdip, struct dentry *tdentry) | |
431 | { | |
432 | return (zpl_rename2(sdip, sdentry, tdip, tdentry, 0)); | |
433 | } | |
434 | #endif | |
435 | ||
ee154f01 BB |
436 | static int |
437 | zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name) | |
438 | { | |
81e97e21 | 439 | cred_t *cr = CRED(); |
ee154f01 BB |
440 | vattr_t *vap; |
441 | struct inode *ip; | |
442 | int error; | |
40d06e3c | 443 | fstrans_cookie_t cookie; |
ee154f01 | 444 | |
81e97e21 | 445 | crhold(cr); |
d1d7e268 | 446 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 447 | zpl_vap_init(vap, dir, S_IFLNK | S_IRWXUGO, cr); |
ee154f01 | 448 | |
40d06e3c | 449 | cookie = spl_fstrans_mark(); |
ee154f01 | 450 | error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0); |
227bc969 | 451 | if (error == 0) { |
7b3e34ba | 452 | d_instantiate(dentry, ip); |
214806c7 DL |
453 | |
454 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
455 | if (error) | |
da5e151f | 456 | (void) zfs_remove(dir, dname(dentry), cr, 0); |
227bc969 | 457 | } |
7b3e34ba | 458 | |
a438ff0e | 459 | spl_fstrans_unmark(cookie); |
d1d7e268 | 460 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 461 | crfree(cr); |
ee154f01 BB |
462 | ASSERT3S(error, <=, 0); |
463 | ||
464 | return (error); | |
465 | } | |
466 | ||
beeed459 BB |
467 | #if defined(HAVE_PUT_LINK_COOKIE) |
468 | static void | |
469 | zpl_put_link(struct inode *unused, void *cookie) | |
470 | { | |
471 | kmem_free(cookie, MAXPATHLEN); | |
472 | } | |
473 | #elif defined(HAVE_PUT_LINK_NAMEIDATA) | |
474 | static void | |
475 | zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) | |
476 | { | |
477 | const char *link = nd_get_link(nd); | |
478 | ||
479 | if (!IS_ERR(link)) | |
480 | kmem_free(link, MAXPATHLEN); | |
481 | } | |
482 | #elif defined(HAVE_PUT_LINK_DELAYED) | |
483 | static void | |
484 | zpl_put_link(void *ptr) | |
485 | { | |
486 | kmem_free(ptr, MAXPATHLEN); | |
487 | } | |
bd29109f | 488 | #endif |
beeed459 BB |
489 | |
490 | static int | |
491 | zpl_get_link_common(struct dentry *dentry, struct inode *ip, char **link) | |
ee154f01 | 492 | { |
beeed459 | 493 | fstrans_cookie_t cookie; |
81e97e21 | 494 | cred_t *cr = CRED(); |
8b4f9a2d BB |
495 | struct iovec iov; |
496 | uio_t uio; | |
8b4f9a2d BB |
497 | int error; |
498 | ||
81e97e21 | 499 | crhold(cr); |
beeed459 | 500 | *link = NULL; |
8b4f9a2d | 501 | iov.iov_len = MAXPATHLEN; |
beeed459 | 502 | iov.iov_base = kmem_zalloc(MAXPATHLEN, KM_SLEEP); |
8b4f9a2d BB |
503 | |
504 | uio.uio_iov = &iov; | |
505 | uio.uio_iovcnt = 1; | |
5475aada | 506 | uio.uio_skip = 0; |
8b4f9a2d BB |
507 | uio.uio_resid = (MAXPATHLEN - 1); |
508 | uio.uio_segflg = UIO_SYSSPACE; | |
509 | ||
40d06e3c | 510 | cookie = spl_fstrans_mark(); |
50950001 | 511 | error = -zfs_readlink(ip, &uio, cr); |
40d06e3c | 512 | spl_fstrans_unmark(cookie); |
bd29109f BB |
513 | crfree(cr); |
514 | ||
bd29109f | 515 | if (error) |
beeed459 | 516 | kmem_free(iov.iov_base, MAXPATHLEN); |
bd29109f | 517 | else |
beeed459 | 518 | *link = iov.iov_base; |
8b4f9a2d | 519 | |
beeed459 BB |
520 | return (error); |
521 | } | |
522 | ||
523 | #if defined(HAVE_GET_LINK_DELAYED) | |
524 | const char * | |
525 | zpl_get_link(struct dentry *dentry, struct inode *inode, | |
526 | struct delayed_call *done) | |
527 | { | |
528 | char *link = NULL; | |
529 | int error; | |
530 | ||
531 | if (!dentry) | |
532 | return (ERR_PTR(-ECHILD)); | |
533 | ||
534 | error = zpl_get_link_common(dentry, inode, &link); | |
bd29109f BB |
535 | if (error) |
536 | return (ERR_PTR(error)); | |
beeed459 BB |
537 | |
538 | set_delayed_call(done, zpl_put_link, link); | |
539 | ||
540 | return (link); | |
ee154f01 | 541 | } |
beeed459 BB |
542 | #elif defined(HAVE_GET_LINK_COOKIE) |
543 | const char * | |
544 | zpl_get_link(struct dentry *dentry, struct inode *inode, void **cookie) | |
545 | { | |
546 | char *link = NULL; | |
547 | int error; | |
ee154f01 | 548 | |
beeed459 BB |
549 | if (!dentry) |
550 | return (ERR_PTR(-ECHILD)); | |
551 | ||
552 | error = zpl_get_link_common(dentry, inode, &link); | |
553 | if (error) | |
554 | return (ERR_PTR(error)); | |
555 | ||
556 | return (*cookie = link); | |
557 | } | |
558 | #elif defined(HAVE_FOLLOW_LINK_COOKIE) | |
559 | const char * | |
560 | zpl_follow_link(struct dentry *dentry, void **cookie) | |
ee154f01 | 561 | { |
beeed459 BB |
562 | char *link = NULL; |
563 | int error; | |
ee154f01 | 564 | |
beeed459 BB |
565 | error = zpl_get_link_common(dentry, dentry->d_inode, &link); |
566 | if (error) | |
567 | return (ERR_PTR(error)); | |
568 | ||
569 | return (*cookie = link); | |
ee154f01 | 570 | } |
beeed459 BB |
571 | #elif defined(HAVE_FOLLOW_LINK_NAMEIDATA) |
572 | static void * | |
573 | zpl_follow_link(struct dentry *dentry, struct nameidata *nd) | |
bd29109f | 574 | { |
beeed459 BB |
575 | char *link = NULL; |
576 | int error; | |
577 | ||
578 | error = zpl_get_link_common(dentry, dentry->d_inode, &link); | |
579 | if (error) | |
580 | nd_set_link(nd, ERR_PTR(error)); | |
581 | else | |
582 | nd_set_link(nd, link); | |
583 | ||
584 | return (NULL); | |
bd29109f BB |
585 | } |
586 | #endif | |
ee154f01 BB |
587 | |
588 | static int | |
589 | zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) | |
590 | { | |
81e97e21 | 591 | cred_t *cr = CRED(); |
ee154f01 | 592 | struct inode *ip = old_dentry->d_inode; |
ee154f01 | 593 | int error; |
40d06e3c | 594 | fstrans_cookie_t cookie; |
ee154f01 BB |
595 | |
596 | if (ip->i_nlink >= ZFS_LINK_MAX) | |
d1d7e268 | 597 | return (-EMLINK); |
ee154f01 | 598 | |
81e97e21 | 599 | crhold(cr); |
2946a1a1 | 600 | ip->i_ctime = current_time(ip); |
ee154f01 BB |
601 | igrab(ip); /* Use ihold() if available */ |
602 | ||
40d06e3c | 603 | cookie = spl_fstrans_mark(); |
da5e151f | 604 | error = -zfs_link(dir, ip, dname(dentry), cr, 0); |
ee154f01 BB |
605 | if (error) { |
606 | iput(ip); | |
607 | goto out; | |
608 | } | |
609 | ||
610 | d_instantiate(dentry, ip); | |
611 | out: | |
a438ff0e | 612 | spl_fstrans_unmark(cookie); |
81e97e21 | 613 | crfree(cr); |
ee154f01 BB |
614 | ASSERT3S(error, <=, 0); |
615 | ||
616 | return (error); | |
617 | } | |
618 | ||
ea1fdf46 | 619 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 | 620 | static void |
d1d7e268 | 621 | zpl_truncate_range(struct inode *ip, loff_t start, loff_t end) |
5cb63a57 ED |
622 | { |
623 | cred_t *cr = CRED(); | |
624 | flock64_t bf; | |
40d06e3c | 625 | fstrans_cookie_t cookie; |
5cb63a57 ED |
626 | |
627 | ASSERT3S(start, <=, end); | |
628 | ||
629 | /* | |
630 | * zfs_freesp() will interpret (len == 0) as meaning "truncate until | |
631 | * the end of the file". We don't want that. | |
632 | */ | |
633 | if (start == end) | |
634 | return; | |
635 | ||
636 | crhold(cr); | |
637 | ||
638 | bf.l_type = F_WRLCK; | |
639 | bf.l_whence = 0; | |
640 | bf.l_start = start; | |
641 | bf.l_len = end - start; | |
642 | bf.l_pid = 0; | |
40d06e3c | 643 | cookie = spl_fstrans_mark(); |
5cb63a57 | 644 | zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr); |
40d06e3c | 645 | spl_fstrans_unmark(cookie); |
5cb63a57 ED |
646 | |
647 | crfree(cr); | |
648 | } | |
ea1fdf46 | 649 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
5cb63a57 | 650 | |
cb2d1901 ED |
651 | #ifdef HAVE_INODE_FALLOCATE |
652 | static long | |
653 | zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len) | |
654 | { | |
d1d7e268 | 655 | return (zpl_fallocate_common(ip, mode, offset, len)); |
cb2d1901 ED |
656 | } |
657 | #endif /* HAVE_INODE_FALLOCATE */ | |
658 | ||
7b3e34ba BB |
659 | static int |
660 | #ifdef HAVE_D_REVALIDATE_NAMEIDATA | |
661 | zpl_revalidate(struct dentry *dentry, struct nameidata *nd) | |
662 | { | |
09a661e9 | 663 | unsigned int flags = (nd ? nd->flags : 0); |
7b3e34ba BB |
664 | #else |
665 | zpl_revalidate(struct dentry *dentry, unsigned int flags) | |
666 | { | |
667 | #endif /* HAVE_D_REVALIDATE_NAMEIDATA */ | |
02730c33 | 668 | /* CSTYLED */ |
0037b49e | 669 | zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info; |
7b3e34ba BB |
670 | int error; |
671 | ||
672 | if (flags & LOOKUP_RCU) | |
673 | return (-ECHILD); | |
674 | ||
278bee93 BB |
675 | /* |
676 | * Automounted snapshots rely on periodic dentry revalidation | |
677 | * to defer snapshots from being automatically unmounted. | |
678 | */ | |
0037b49e BB |
679 | if (zfsvfs->z_issnap) { |
680 | if (time_after(jiffies, zfsvfs->z_snap_defer_time + | |
278bee93 | 681 | MAX(zfs_expire_snapshot * HZ / 2, HZ))) { |
0037b49e BB |
682 | zfsvfs->z_snap_defer_time = jiffies; |
683 | zfsctl_snapshot_unmount_delay(zfsvfs->z_os->os_spa, | |
684 | dmu_objset_id(zfsvfs->z_os), zfs_expire_snapshot); | |
278bee93 BB |
685 | } |
686 | } | |
687 | ||
7b3e34ba BB |
688 | /* |
689 | * After a rollback negative dentries created before the rollback | |
690 | * time must be invalidated. Otherwise they can obscure files which | |
691 | * are only present in the rolled back dataset. | |
692 | */ | |
693 | if (dentry->d_inode == NULL) { | |
694 | spin_lock(&dentry->d_lock); | |
0037b49e | 695 | error = time_before(dentry->d_time, zfsvfs->z_rollback_time); |
7b3e34ba BB |
696 | spin_unlock(&dentry->d_lock); |
697 | ||
698 | if (error) | |
699 | return (0); | |
700 | } | |
701 | ||
702 | /* | |
703 | * The dentry may reference a stale inode if a mounted file system | |
704 | * was rolled back to a point in time where the object didn't exist. | |
705 | */ | |
706 | if (dentry->d_inode && ITOZ(dentry->d_inode)->z_is_stale) | |
707 | return (0); | |
708 | ||
709 | return (1); | |
710 | } | |
cb2d1901 | 711 | |
ee154f01 | 712 | const struct inode_operations zpl_inode_operations = { |
ee154f01 BB |
713 | .setattr = zpl_setattr, |
714 | .getattr = zpl_getattr, | |
0fedeedd | 715 | #ifdef HAVE_GENERIC_SETXATTR |
ee154f01 BB |
716 | .setxattr = generic_setxattr, |
717 | .getxattr = generic_getxattr, | |
718 | .removexattr = generic_removexattr, | |
0fedeedd | 719 | #endif |
ee154f01 | 720 | .listxattr = zpl_xattr_list, |
ea1fdf46 | 721 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 | 722 | .truncate_range = zpl_truncate_range, |
ea1fdf46 | 723 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
cb2d1901 ED |
724 | #ifdef HAVE_INODE_FALLOCATE |
725 | .fallocate = zpl_fallocate, | |
726 | #endif /* HAVE_INODE_FALLOCATE */ | |
b695c34e | 727 | #if defined(CONFIG_FS_POSIX_ACL) |
0420c126 | 728 | #if defined(HAVE_SET_ACL) |
729 | .set_acl = zpl_set_acl, | |
730 | #endif | |
023699cd MM |
731 | #if defined(HAVE_GET_ACL) |
732 | .get_acl = zpl_get_acl, | |
733 | #elif defined(HAVE_CHECK_ACL) | |
734 | .check_acl = zpl_check_acl, | |
735 | #elif defined(HAVE_PERMISSION) | |
736 | .permission = zpl_permission, | |
737 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 738 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 BB |
739 | }; |
740 | ||
741 | const struct inode_operations zpl_dir_inode_operations = { | |
ee154f01 BB |
742 | .create = zpl_create, |
743 | .lookup = zpl_lookup, | |
744 | .link = zpl_link, | |
745 | .unlink = zpl_unlink, | |
746 | .symlink = zpl_symlink, | |
747 | .mkdir = zpl_mkdir, | |
748 | .rmdir = zpl_rmdir, | |
749 | .mknod = zpl_mknod, | |
b8d9e264 CC |
750 | #ifdef HAVE_RENAME_WANTS_FLAGS |
751 | .rename = zpl_rename2, | |
752 | #else | |
ee154f01 | 753 | .rename = zpl_rename, |
ace1eae8 CC |
754 | #endif |
755 | #ifdef HAVE_TMPFILE | |
756 | .tmpfile = zpl_tmpfile, | |
b8d9e264 | 757 | #endif |
ee154f01 | 758 | .setattr = zpl_setattr, |
a6695d83 | 759 | .getattr = zpl_getattr, |
0fedeedd | 760 | #ifdef HAVE_GENERIC_SETXATTR |
a6695d83 BB |
761 | .setxattr = generic_setxattr, |
762 | .getxattr = generic_getxattr, | |
763 | .removexattr = generic_removexattr, | |
0fedeedd | 764 | #endif |
a6695d83 | 765 | .listxattr = zpl_xattr_list, |
b695c34e | 766 | #if defined(CONFIG_FS_POSIX_ACL) |
0420c126 | 767 | #if defined(HAVE_SET_ACL) |
768 | .set_acl = zpl_set_acl, | |
769 | #endif | |
023699cd MM |
770 | #if defined(HAVE_GET_ACL) |
771 | .get_acl = zpl_get_acl, | |
772 | #elif defined(HAVE_CHECK_ACL) | |
773 | .check_acl = zpl_check_acl, | |
774 | #elif defined(HAVE_PERMISSION) | |
775 | .permission = zpl_permission, | |
776 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 777 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 BB |
778 | }; |
779 | ||
780 | const struct inode_operations zpl_symlink_inode_operations = { | |
a5e046ea | 781 | #ifdef HAVE_GENERIC_READLINK |
ee154f01 | 782 | .readlink = generic_readlink, |
a5e046ea | 783 | #endif |
beeed459 BB |
784 | #if defined(HAVE_GET_LINK_DELAYED) || defined(HAVE_GET_LINK_COOKIE) |
785 | .get_link = zpl_get_link, | |
786 | #elif defined(HAVE_FOLLOW_LINK_COOKIE) || defined(HAVE_FOLLOW_LINK_NAMEIDATA) | |
ee154f01 | 787 | .follow_link = zpl_follow_link, |
beeed459 BB |
788 | #endif |
789 | #if defined(HAVE_PUT_LINK_COOKIE) || defined(HAVE_PUT_LINK_NAMEIDATA) | |
ee154f01 | 790 | .put_link = zpl_put_link, |
beeed459 | 791 | #endif |
6f2255ba BB |
792 | .setattr = zpl_setattr, |
793 | .getattr = zpl_getattr, | |
0fedeedd | 794 | #ifdef HAVE_GENERIC_SETXATTR |
f31b3ebe BB |
795 | .setxattr = generic_setxattr, |
796 | .getxattr = generic_getxattr, | |
797 | .removexattr = generic_removexattr, | |
0fedeedd | 798 | #endif |
f31b3ebe | 799 | .listxattr = zpl_xattr_list, |
ee154f01 BB |
800 | }; |
801 | ||
802 | const struct inode_operations zpl_special_inode_operations = { | |
a6695d83 BB |
803 | .setattr = zpl_setattr, |
804 | .getattr = zpl_getattr, | |
0fedeedd | 805 | #ifdef HAVE_GENERIC_SETXATTR |
a6695d83 BB |
806 | .setxattr = generic_setxattr, |
807 | .getxattr = generic_getxattr, | |
808 | .removexattr = generic_removexattr, | |
0fedeedd | 809 | #endif |
a6695d83 | 810 | .listxattr = zpl_xattr_list, |
b695c34e | 811 | #if defined(CONFIG_FS_POSIX_ACL) |
0420c126 | 812 | #if defined(HAVE_SET_ACL) |
813 | .set_acl = zpl_set_acl, | |
814 | #endif | |
023699cd MM |
815 | #if defined(HAVE_GET_ACL) |
816 | .get_acl = zpl_get_acl, | |
817 | #elif defined(HAVE_CHECK_ACL) | |
818 | .check_acl = zpl_check_acl, | |
819 | #elif defined(HAVE_PERMISSION) | |
820 | .permission = zpl_permission, | |
821 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 822 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 | 823 | }; |
7b3e34ba BB |
824 | |
825 | dentry_operations_t zpl_dentry_operations = { | |
826 | .d_revalidate = zpl_revalidate, | |
827 | }; |