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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; |
c5d02870 | 51 | zfs_sb_t *zsb = dentry->d_sb->s_fs_info; |
ee154f01 | 52 | |
eca7b760 | 53 | if (dlen(dentry) > ZFS_MAX_DATASET_NAME_LEN) |
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 */ | |
60 | if (zsb->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 | ||
217 | static int | |
218 | zpl_unlink(struct inode *dir, struct dentry *dentry) | |
219 | { | |
81e97e21 | 220 | cred_t *cr = CRED(); |
ee154f01 | 221 | int error; |
40d06e3c | 222 | fstrans_cookie_t cookie; |
9d36cdb6 | 223 | zfs_sb_t *zsb = dentry->d_sb->s_fs_info; |
ee154f01 | 224 | |
81e97e21 | 225 | crhold(cr); |
40d06e3c | 226 | cookie = spl_fstrans_mark(); |
da5e151f | 227 | error = -zfs_remove(dir, dname(dentry), cr, 0); |
9d36cdb6 RS |
228 | |
229 | /* | |
230 | * For a CI FS we must invalidate the dentry to prevent the | |
231 | * creation of negative entries. | |
232 | */ | |
233 | if (error == 0 && zsb->z_case == ZFS_CASE_INSENSITIVE) | |
234 | d_invalidate(dentry); | |
235 | ||
40d06e3c | 236 | spl_fstrans_unmark(cookie); |
81e97e21 | 237 | crfree(cr); |
ee154f01 BB |
238 | ASSERT3S(error, <=, 0); |
239 | ||
240 | return (error); | |
241 | } | |
242 | ||
243 | static int | |
b39d3b9f | 244 | zpl_mkdir(struct inode *dir, struct dentry *dentry, zpl_umode_t mode) |
ee154f01 | 245 | { |
81e97e21 | 246 | cred_t *cr = CRED(); |
ee154f01 BB |
247 | vattr_t *vap; |
248 | struct inode *ip; | |
249 | int error; | |
40d06e3c | 250 | fstrans_cookie_t cookie; |
ee154f01 | 251 | |
81e97e21 | 252 | crhold(cr); |
d1d7e268 | 253 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 254 | zpl_vap_init(vap, dir, mode | S_IFDIR, cr); |
ee154f01 | 255 | |
40d06e3c | 256 | cookie = spl_fstrans_mark(); |
ee154f01 | 257 | error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL); |
023699cd | 258 | if (error == 0) { |
7b3e34ba | 259 | d_instantiate(dentry, ip); |
214806c7 DL |
260 | |
261 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
262 | if (error == 0) | |
263 | error = zpl_init_acl(ip, dir); | |
264 | ||
265 | if (error) | |
266 | (void) zfs_rmdir(dir, dname(dentry), NULL, cr, 0); | |
023699cd | 267 | } |
7b3e34ba | 268 | |
a438ff0e | 269 | spl_fstrans_unmark(cookie); |
d1d7e268 | 270 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 271 | crfree(cr); |
ee154f01 BB |
272 | ASSERT3S(error, <=, 0); |
273 | ||
274 | return (error); | |
275 | } | |
276 | ||
277 | static int | |
278 | zpl_rmdir(struct inode * dir, struct dentry *dentry) | |
279 | { | |
81e97e21 | 280 | cred_t *cr = CRED(); |
ee154f01 | 281 | int error; |
40d06e3c | 282 | fstrans_cookie_t cookie; |
9d36cdb6 | 283 | zfs_sb_t *zsb = dentry->d_sb->s_fs_info; |
ee154f01 | 284 | |
81e97e21 | 285 | crhold(cr); |
40d06e3c | 286 | cookie = spl_fstrans_mark(); |
ee154f01 | 287 | error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0); |
9d36cdb6 RS |
288 | |
289 | /* | |
290 | * For a CI FS we must invalidate the dentry to prevent the | |
291 | * creation of negative entries. | |
292 | */ | |
293 | if (error == 0 && zsb->z_case == ZFS_CASE_INSENSITIVE) | |
294 | d_invalidate(dentry); | |
295 | ||
40d06e3c | 296 | spl_fstrans_unmark(cookie); |
81e97e21 | 297 | crfree(cr); |
ee154f01 BB |
298 | ASSERT3S(error, <=, 0); |
299 | ||
300 | return (error); | |
301 | } | |
302 | ||
303 | static int | |
304 | zpl_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) | |
305 | { | |
ee154f01 | 306 | int error; |
40d06e3c | 307 | fstrans_cookie_t cookie; |
ee154f01 | 308 | |
40d06e3c | 309 | cookie = spl_fstrans_mark(); |
057e8eee | 310 | error = -zfs_getattr_fast(dentry->d_inode, stat); |
40d06e3c | 311 | spl_fstrans_unmark(cookie); |
ee154f01 BB |
312 | ASSERT3S(error, <=, 0); |
313 | ||
314 | return (error); | |
315 | } | |
316 | ||
317 | static int | |
5484965a | 318 | zpl_setattr(struct dentry *dentry, struct iattr *ia) |
ee154f01 | 319 | { |
023699cd | 320 | struct inode *ip = dentry->d_inode; |
81e97e21 | 321 | cred_t *cr = CRED(); |
5484965a | 322 | vattr_t *vap; |
ee154f01 | 323 | int error; |
40d06e3c | 324 | fstrans_cookie_t cookie; |
ee154f01 | 325 | |
023699cd | 326 | error = inode_change_ok(ip, ia); |
ee154f01 BB |
327 | if (error) |
328 | return (error); | |
329 | ||
81e97e21 | 330 | crhold(cr); |
d1d7e268 | 331 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
5484965a BB |
332 | vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK; |
333 | vap->va_mode = ia->ia_mode; | |
570d6edf RY |
334 | vap->va_uid = KUID_TO_SUID(ia->ia_uid); |
335 | vap->va_gid = KGID_TO_SGID(ia->ia_gid); | |
5484965a BB |
336 | vap->va_size = ia->ia_size; |
337 | vap->va_atime = ia->ia_atime; | |
338 | vap->va_mtime = ia->ia_mtime; | |
339 | vap->va_ctime = ia->ia_ctime; | |
340 | ||
704cd075 | 341 | if (vap->va_mask & ATTR_ATIME) |
87f9371a NB |
342 | ip->i_atime = timespec_trunc(ia->ia_atime, |
343 | ip->i_sb->s_time_gran); | |
704cd075 | 344 | |
40d06e3c | 345 | cookie = spl_fstrans_mark(); |
023699cd MM |
346 | error = -zfs_setattr(ip, vap, 0, cr); |
347 | if (!error && (ia->ia_valid & ATTR_MODE)) | |
348 | error = zpl_chmod_acl(ip); | |
5484965a | 349 | |
a438ff0e | 350 | spl_fstrans_unmark(cookie); |
d1d7e268 | 351 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 352 | crfree(cr); |
ee154f01 BB |
353 | ASSERT3S(error, <=, 0); |
354 | ||
5484965a | 355 | return (error); |
ee154f01 BB |
356 | } |
357 | ||
358 | static int | |
359 | zpl_rename(struct inode *sdip, struct dentry *sdentry, | |
360 | struct inode *tdip, struct dentry *tdentry) | |
361 | { | |
81e97e21 | 362 | cred_t *cr = CRED(); |
ee154f01 | 363 | int error; |
40d06e3c | 364 | fstrans_cookie_t cookie; |
ee154f01 | 365 | |
81e97e21 | 366 | crhold(cr); |
40d06e3c | 367 | cookie = spl_fstrans_mark(); |
ee154f01 | 368 | error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0); |
40d06e3c | 369 | spl_fstrans_unmark(cookie); |
81e97e21 | 370 | crfree(cr); |
ee154f01 BB |
371 | ASSERT3S(error, <=, 0); |
372 | ||
373 | return (error); | |
374 | } | |
375 | ||
376 | static int | |
377 | zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name) | |
378 | { | |
81e97e21 | 379 | cred_t *cr = CRED(); |
ee154f01 BB |
380 | vattr_t *vap; |
381 | struct inode *ip; | |
382 | int error; | |
40d06e3c | 383 | fstrans_cookie_t cookie; |
ee154f01 | 384 | |
81e97e21 | 385 | crhold(cr); |
d1d7e268 | 386 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 387 | zpl_vap_init(vap, dir, S_IFLNK | S_IRWXUGO, cr); |
ee154f01 | 388 | |
40d06e3c | 389 | cookie = spl_fstrans_mark(); |
ee154f01 | 390 | error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0); |
227bc969 | 391 | if (error == 0) { |
7b3e34ba | 392 | d_instantiate(dentry, ip); |
214806c7 DL |
393 | |
394 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
395 | if (error) | |
da5e151f | 396 | (void) zfs_remove(dir, dname(dentry), cr, 0); |
227bc969 | 397 | } |
7b3e34ba | 398 | |
a438ff0e | 399 | spl_fstrans_unmark(cookie); |
d1d7e268 | 400 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 401 | crfree(cr); |
ee154f01 BB |
402 | ASSERT3S(error, <=, 0); |
403 | ||
404 | return (error); | |
405 | } | |
406 | ||
beeed459 BB |
407 | #if defined(HAVE_PUT_LINK_COOKIE) |
408 | static void | |
409 | zpl_put_link(struct inode *unused, void *cookie) | |
410 | { | |
411 | kmem_free(cookie, MAXPATHLEN); | |
412 | } | |
413 | #elif defined(HAVE_PUT_LINK_NAMEIDATA) | |
414 | static void | |
415 | zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) | |
416 | { | |
417 | const char *link = nd_get_link(nd); | |
418 | ||
419 | if (!IS_ERR(link)) | |
420 | kmem_free(link, MAXPATHLEN); | |
421 | } | |
422 | #elif defined(HAVE_PUT_LINK_DELAYED) | |
423 | static void | |
424 | zpl_put_link(void *ptr) | |
425 | { | |
426 | kmem_free(ptr, MAXPATHLEN); | |
427 | } | |
bd29109f | 428 | #endif |
beeed459 BB |
429 | |
430 | static int | |
431 | zpl_get_link_common(struct dentry *dentry, struct inode *ip, char **link) | |
ee154f01 | 432 | { |
beeed459 | 433 | fstrans_cookie_t cookie; |
81e97e21 | 434 | cred_t *cr = CRED(); |
8b4f9a2d BB |
435 | struct iovec iov; |
436 | uio_t uio; | |
8b4f9a2d BB |
437 | int error; |
438 | ||
81e97e21 | 439 | crhold(cr); |
beeed459 | 440 | *link = NULL; |
8b4f9a2d | 441 | iov.iov_len = MAXPATHLEN; |
beeed459 | 442 | iov.iov_base = kmem_zalloc(MAXPATHLEN, KM_SLEEP); |
8b4f9a2d BB |
443 | |
444 | uio.uio_iov = &iov; | |
445 | uio.uio_iovcnt = 1; | |
5475aada | 446 | uio.uio_skip = 0; |
8b4f9a2d BB |
447 | uio.uio_resid = (MAXPATHLEN - 1); |
448 | uio.uio_segflg = UIO_SYSSPACE; | |
449 | ||
40d06e3c | 450 | cookie = spl_fstrans_mark(); |
50950001 | 451 | error = -zfs_readlink(ip, &uio, cr); |
40d06e3c | 452 | spl_fstrans_unmark(cookie); |
bd29109f BB |
453 | crfree(cr); |
454 | ||
bd29109f | 455 | if (error) |
beeed459 | 456 | kmem_free(iov.iov_base, MAXPATHLEN); |
bd29109f | 457 | else |
beeed459 | 458 | *link = iov.iov_base; |
8b4f9a2d | 459 | |
beeed459 BB |
460 | return (error); |
461 | } | |
462 | ||
463 | #if defined(HAVE_GET_LINK_DELAYED) | |
464 | const char * | |
465 | zpl_get_link(struct dentry *dentry, struct inode *inode, | |
466 | struct delayed_call *done) | |
467 | { | |
468 | char *link = NULL; | |
469 | int error; | |
470 | ||
471 | if (!dentry) | |
472 | return (ERR_PTR(-ECHILD)); | |
473 | ||
474 | error = zpl_get_link_common(dentry, inode, &link); | |
bd29109f BB |
475 | if (error) |
476 | return (ERR_PTR(error)); | |
beeed459 BB |
477 | |
478 | set_delayed_call(done, zpl_put_link, link); | |
479 | ||
480 | return (link); | |
ee154f01 | 481 | } |
beeed459 BB |
482 | #elif defined(HAVE_GET_LINK_COOKIE) |
483 | const char * | |
484 | zpl_get_link(struct dentry *dentry, struct inode *inode, void **cookie) | |
485 | { | |
486 | char *link = NULL; | |
487 | int error; | |
ee154f01 | 488 | |
beeed459 BB |
489 | if (!dentry) |
490 | return (ERR_PTR(-ECHILD)); | |
491 | ||
492 | error = zpl_get_link_common(dentry, inode, &link); | |
493 | if (error) | |
494 | return (ERR_PTR(error)); | |
495 | ||
496 | return (*cookie = link); | |
497 | } | |
498 | #elif defined(HAVE_FOLLOW_LINK_COOKIE) | |
499 | const char * | |
500 | zpl_follow_link(struct dentry *dentry, void **cookie) | |
ee154f01 | 501 | { |
beeed459 BB |
502 | char *link = NULL; |
503 | int error; | |
ee154f01 | 504 | |
beeed459 BB |
505 | error = zpl_get_link_common(dentry, dentry->d_inode, &link); |
506 | if (error) | |
507 | return (ERR_PTR(error)); | |
508 | ||
509 | return (*cookie = link); | |
ee154f01 | 510 | } |
beeed459 BB |
511 | #elif defined(HAVE_FOLLOW_LINK_NAMEIDATA) |
512 | static void * | |
513 | zpl_follow_link(struct dentry *dentry, struct nameidata *nd) | |
bd29109f | 514 | { |
beeed459 BB |
515 | char *link = NULL; |
516 | int error; | |
517 | ||
518 | error = zpl_get_link_common(dentry, dentry->d_inode, &link); | |
519 | if (error) | |
520 | nd_set_link(nd, ERR_PTR(error)); | |
521 | else | |
522 | nd_set_link(nd, link); | |
523 | ||
524 | return (NULL); | |
bd29109f BB |
525 | } |
526 | #endif | |
ee154f01 BB |
527 | |
528 | static int | |
529 | zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) | |
530 | { | |
81e97e21 | 531 | cred_t *cr = CRED(); |
ee154f01 | 532 | struct inode *ip = old_dentry->d_inode; |
ee154f01 | 533 | int error; |
40d06e3c | 534 | fstrans_cookie_t cookie; |
ee154f01 BB |
535 | |
536 | if (ip->i_nlink >= ZFS_LINK_MAX) | |
d1d7e268 | 537 | return (-EMLINK); |
ee154f01 | 538 | |
81e97e21 | 539 | crhold(cr); |
ee154f01 BB |
540 | ip->i_ctime = CURRENT_TIME_SEC; |
541 | igrab(ip); /* Use ihold() if available */ | |
542 | ||
40d06e3c | 543 | cookie = spl_fstrans_mark(); |
da5e151f | 544 | error = -zfs_link(dir, ip, dname(dentry), cr, 0); |
ee154f01 BB |
545 | if (error) { |
546 | iput(ip); | |
547 | goto out; | |
548 | } | |
549 | ||
550 | d_instantiate(dentry, ip); | |
551 | out: | |
a438ff0e | 552 | spl_fstrans_unmark(cookie); |
81e97e21 | 553 | crfree(cr); |
ee154f01 BB |
554 | ASSERT3S(error, <=, 0); |
555 | ||
556 | return (error); | |
557 | } | |
558 | ||
ea1fdf46 | 559 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 | 560 | static void |
d1d7e268 | 561 | zpl_truncate_range(struct inode *ip, loff_t start, loff_t end) |
5cb63a57 ED |
562 | { |
563 | cred_t *cr = CRED(); | |
564 | flock64_t bf; | |
40d06e3c | 565 | fstrans_cookie_t cookie; |
5cb63a57 ED |
566 | |
567 | ASSERT3S(start, <=, end); | |
568 | ||
569 | /* | |
570 | * zfs_freesp() will interpret (len == 0) as meaning "truncate until | |
571 | * the end of the file". We don't want that. | |
572 | */ | |
573 | if (start == end) | |
574 | return; | |
575 | ||
576 | crhold(cr); | |
577 | ||
578 | bf.l_type = F_WRLCK; | |
579 | bf.l_whence = 0; | |
580 | bf.l_start = start; | |
581 | bf.l_len = end - start; | |
582 | bf.l_pid = 0; | |
40d06e3c | 583 | cookie = spl_fstrans_mark(); |
5cb63a57 | 584 | zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr); |
40d06e3c | 585 | spl_fstrans_unmark(cookie); |
5cb63a57 ED |
586 | |
587 | crfree(cr); | |
588 | } | |
ea1fdf46 | 589 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
5cb63a57 | 590 | |
cb2d1901 ED |
591 | #ifdef HAVE_INODE_FALLOCATE |
592 | static long | |
593 | zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len) | |
594 | { | |
d1d7e268 | 595 | return (zpl_fallocate_common(ip, mode, offset, len)); |
cb2d1901 ED |
596 | } |
597 | #endif /* HAVE_INODE_FALLOCATE */ | |
598 | ||
7b3e34ba BB |
599 | static int |
600 | #ifdef HAVE_D_REVALIDATE_NAMEIDATA | |
601 | zpl_revalidate(struct dentry *dentry, struct nameidata *nd) | |
602 | { | |
09a661e9 | 603 | unsigned int flags = (nd ? nd->flags : 0); |
7b3e34ba BB |
604 | #else |
605 | zpl_revalidate(struct dentry *dentry, unsigned int flags) | |
606 | { | |
607 | #endif /* HAVE_D_REVALIDATE_NAMEIDATA */ | |
608 | zfs_sb_t *zsb = dentry->d_sb->s_fs_info; | |
609 | int error; | |
610 | ||
611 | if (flags & LOOKUP_RCU) | |
612 | return (-ECHILD); | |
613 | ||
278bee93 BB |
614 | /* |
615 | * Automounted snapshots rely on periodic dentry revalidation | |
616 | * to defer snapshots from being automatically unmounted. | |
617 | */ | |
618 | if (zsb->z_issnap) { | |
619 | if (time_after(jiffies, zsb->z_snap_defer_time + | |
620 | MAX(zfs_expire_snapshot * HZ / 2, HZ))) { | |
621 | zsb->z_snap_defer_time = jiffies; | |
24ef51f6 | 622 | zfsctl_snapshot_unmount_delay(zsb->z_os->os_spa, |
278bee93 BB |
623 | dmu_objset_id(zsb->z_os), zfs_expire_snapshot); |
624 | } | |
625 | } | |
626 | ||
7b3e34ba BB |
627 | /* |
628 | * After a rollback negative dentries created before the rollback | |
629 | * time must be invalidated. Otherwise they can obscure files which | |
630 | * are only present in the rolled back dataset. | |
631 | */ | |
632 | if (dentry->d_inode == NULL) { | |
633 | spin_lock(&dentry->d_lock); | |
634 | error = time_before(dentry->d_time, zsb->z_rollback_time); | |
635 | spin_unlock(&dentry->d_lock); | |
636 | ||
637 | if (error) | |
638 | return (0); | |
639 | } | |
640 | ||
641 | /* | |
642 | * The dentry may reference a stale inode if a mounted file system | |
643 | * was rolled back to a point in time where the object didn't exist. | |
644 | */ | |
645 | if (dentry->d_inode && ITOZ(dentry->d_inode)->z_is_stale) | |
646 | return (0); | |
647 | ||
648 | return (1); | |
649 | } | |
cb2d1901 | 650 | |
ee154f01 | 651 | const struct inode_operations zpl_inode_operations = { |
ee154f01 BB |
652 | .setattr = zpl_setattr, |
653 | .getattr = zpl_getattr, | |
654 | .setxattr = generic_setxattr, | |
655 | .getxattr = generic_getxattr, | |
656 | .removexattr = generic_removexattr, | |
657 | .listxattr = zpl_xattr_list, | |
ea1fdf46 | 658 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 | 659 | .truncate_range = zpl_truncate_range, |
ea1fdf46 | 660 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
cb2d1901 ED |
661 | #ifdef HAVE_INODE_FALLOCATE |
662 | .fallocate = zpl_fallocate, | |
663 | #endif /* HAVE_INODE_FALLOCATE */ | |
b695c34e | 664 | #if defined(CONFIG_FS_POSIX_ACL) |
023699cd MM |
665 | #if defined(HAVE_GET_ACL) |
666 | .get_acl = zpl_get_acl, | |
667 | #elif defined(HAVE_CHECK_ACL) | |
668 | .check_acl = zpl_check_acl, | |
669 | #elif defined(HAVE_PERMISSION) | |
670 | .permission = zpl_permission, | |
671 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 672 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 BB |
673 | }; |
674 | ||
675 | const struct inode_operations zpl_dir_inode_operations = { | |
ee154f01 BB |
676 | .create = zpl_create, |
677 | .lookup = zpl_lookup, | |
678 | .link = zpl_link, | |
679 | .unlink = zpl_unlink, | |
680 | .symlink = zpl_symlink, | |
681 | .mkdir = zpl_mkdir, | |
682 | .rmdir = zpl_rmdir, | |
683 | .mknod = zpl_mknod, | |
684 | .rename = zpl_rename, | |
685 | .setattr = zpl_setattr, | |
a6695d83 BB |
686 | .getattr = zpl_getattr, |
687 | .setxattr = generic_setxattr, | |
688 | .getxattr = generic_getxattr, | |
689 | .removexattr = generic_removexattr, | |
690 | .listxattr = zpl_xattr_list, | |
b695c34e | 691 | #if defined(CONFIG_FS_POSIX_ACL) |
023699cd MM |
692 | #if defined(HAVE_GET_ACL) |
693 | .get_acl = zpl_get_acl, | |
694 | #elif defined(HAVE_CHECK_ACL) | |
695 | .check_acl = zpl_check_acl, | |
696 | #elif defined(HAVE_PERMISSION) | |
697 | .permission = zpl_permission, | |
698 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 699 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 BB |
700 | }; |
701 | ||
702 | const struct inode_operations zpl_symlink_inode_operations = { | |
ee154f01 | 703 | .readlink = generic_readlink, |
beeed459 BB |
704 | #if defined(HAVE_GET_LINK_DELAYED) || defined(HAVE_GET_LINK_COOKIE) |
705 | .get_link = zpl_get_link, | |
706 | #elif defined(HAVE_FOLLOW_LINK_COOKIE) || defined(HAVE_FOLLOW_LINK_NAMEIDATA) | |
ee154f01 | 707 | .follow_link = zpl_follow_link, |
beeed459 BB |
708 | #endif |
709 | #if defined(HAVE_PUT_LINK_COOKIE) || defined(HAVE_PUT_LINK_NAMEIDATA) | |
ee154f01 | 710 | .put_link = zpl_put_link, |
beeed459 | 711 | #endif |
6f2255ba BB |
712 | .setattr = zpl_setattr, |
713 | .getattr = zpl_getattr, | |
f31b3ebe BB |
714 | .setxattr = generic_setxattr, |
715 | .getxattr = generic_getxattr, | |
716 | .removexattr = generic_removexattr, | |
717 | .listxattr = zpl_xattr_list, | |
ee154f01 BB |
718 | }; |
719 | ||
720 | const struct inode_operations zpl_special_inode_operations = { | |
a6695d83 BB |
721 | .setattr = zpl_setattr, |
722 | .getattr = zpl_getattr, | |
723 | .setxattr = generic_setxattr, | |
724 | .getxattr = generic_getxattr, | |
725 | .removexattr = generic_removexattr, | |
726 | .listxattr = zpl_xattr_list, | |
b695c34e | 727 | #if defined(CONFIG_FS_POSIX_ACL) |
023699cd MM |
728 | #if defined(HAVE_GET_ACL) |
729 | .get_acl = zpl_get_acl, | |
730 | #elif defined(HAVE_CHECK_ACL) | |
731 | .check_acl = zpl_check_acl, | |
732 | #elif defined(HAVE_PERMISSION) | |
733 | .permission = zpl_permission, | |
734 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 735 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 | 736 | }; |
7b3e34ba BB |
737 | |
738 | dentry_operations_t zpl_dentry_operations = { | |
739 | .d_revalidate = zpl_revalidate, | |
740 | }; |