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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 | ||
104 | ci_name.name = pn.pn_buf; | |
105 | ci_name.len = strlen(pn.pn_buf); | |
106 | new_dentry = d_add_ci(dentry, ip, &ci_name); | |
da5e151f | 107 | pn_free(ppn); |
c5d02870 RS |
108 | return (new_dentry); |
109 | } else { | |
110 | return (d_splice_alias(ip, dentry)); | |
111 | } | |
ee154f01 BB |
112 | } |
113 | ||
ebe7e575 | 114 | void |
7b3e34ba | 115 | zpl_vap_init(vattr_t *vap, struct inode *dir, zpl_umode_t mode, cred_t *cr) |
9fd91dae BB |
116 | { |
117 | vap->va_mask = ATTR_MODE; | |
118 | vap->va_mode = mode; | |
9fd91dae BB |
119 | vap->va_uid = crgetfsuid(cr); |
120 | ||
121 | if (dir && dir->i_mode & S_ISGID) { | |
570d6edf | 122 | vap->va_gid = KGID_TO_SGID(dir->i_gid); |
9fd91dae BB |
123 | if (S_ISDIR(mode)) |
124 | vap->va_mode |= S_ISGID; | |
125 | } else { | |
126 | vap->va_gid = crgetfsgid(cr); | |
127 | } | |
128 | } | |
129 | ||
ee154f01 | 130 | static int |
558ef6d0 | 131 | #ifdef HAVE_CREATE_NAMEIDATA |
b39d3b9f | 132 | zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, |
ee154f01 | 133 | struct nameidata *nd) |
558ef6d0 YS |
134 | #else |
135 | zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, | |
136 | bool flag) | |
137 | #endif | |
ee154f01 | 138 | { |
81e97e21 | 139 | cred_t *cr = CRED(); |
ee154f01 BB |
140 | struct inode *ip; |
141 | vattr_t *vap; | |
142 | int error; | |
40d06e3c | 143 | fstrans_cookie_t cookie; |
ee154f01 | 144 | |
81e97e21 | 145 | crhold(cr); |
d1d7e268 | 146 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 147 | zpl_vap_init(vap, dir, mode, cr); |
ee154f01 | 148 | |
40d06e3c | 149 | cookie = spl_fstrans_mark(); |
e89260a1 BB |
150 | error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL); |
151 | if (error == 0) { | |
7b3e34ba | 152 | d_instantiate(dentry, ip); |
214806c7 DL |
153 | |
154 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
155 | if (error == 0) | |
156 | error = zpl_init_acl(ip, dir); | |
157 | ||
158 | if (error) | |
da5e151f | 159 | (void) zfs_remove(dir, dname(dentry), cr, 0); |
e89260a1 BB |
160 | } |
161 | ||
a438ff0e | 162 | spl_fstrans_unmark(cookie); |
d1d7e268 | 163 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 164 | crfree(cr); |
ee154f01 BB |
165 | ASSERT3S(error, <=, 0); |
166 | ||
167 | return (error); | |
168 | } | |
169 | ||
170 | static int | |
b39d3b9f BB |
171 | zpl_mknod(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, |
172 | dev_t rdev) | |
ee154f01 | 173 | { |
81e97e21 | 174 | cred_t *cr = CRED(); |
ee154f01 BB |
175 | struct inode *ip; |
176 | vattr_t *vap; | |
177 | int error; | |
40d06e3c | 178 | fstrans_cookie_t cookie; |
ee154f01 | 179 | |
aa6d8c10 NB |
180 | /* |
181 | * We currently expect Linux to supply rdev=0 for all sockets | |
182 | * and fifos, but we want to know if this behavior ever changes. | |
183 | */ | |
184 | if (S_ISSOCK(mode) || S_ISFIFO(mode)) | |
185 | ASSERT(rdev == 0); | |
186 | ||
81e97e21 | 187 | crhold(cr); |
d1d7e268 | 188 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 189 | zpl_vap_init(vap, dir, mode, cr); |
ee154f01 | 190 | vap->va_rdev = rdev; |
ee154f01 | 191 | |
40d06e3c | 192 | cookie = spl_fstrans_mark(); |
7b3e34ba | 193 | error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL); |
023699cd | 194 | if (error == 0) { |
7b3e34ba | 195 | d_instantiate(dentry, ip); |
214806c7 DL |
196 | |
197 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
198 | if (error == 0) | |
199 | error = zpl_init_acl(ip, dir); | |
200 | ||
201 | if (error) | |
da5e151f | 202 | (void) zfs_remove(dir, dname(dentry), cr, 0); |
023699cd | 203 | } |
7b3e34ba | 204 | |
a438ff0e | 205 | spl_fstrans_unmark(cookie); |
d1d7e268 | 206 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 207 | crfree(cr); |
ee154f01 BB |
208 | ASSERT3S(error, <=, 0); |
209 | ||
34d5a5fd | 210 | return (error); |
ee154f01 BB |
211 | } |
212 | ||
213 | static int | |
214 | zpl_unlink(struct inode *dir, struct dentry *dentry) | |
215 | { | |
81e97e21 | 216 | cred_t *cr = CRED(); |
ee154f01 | 217 | int error; |
40d06e3c | 218 | fstrans_cookie_t cookie; |
9d36cdb6 | 219 | zfs_sb_t *zsb = dentry->d_sb->s_fs_info; |
ee154f01 | 220 | |
81e97e21 | 221 | crhold(cr); |
40d06e3c | 222 | cookie = spl_fstrans_mark(); |
da5e151f | 223 | error = -zfs_remove(dir, dname(dentry), cr, 0); |
9d36cdb6 RS |
224 | |
225 | /* | |
226 | * For a CI FS we must invalidate the dentry to prevent the | |
227 | * creation of negative entries. | |
228 | */ | |
229 | if (error == 0 && zsb->z_case == ZFS_CASE_INSENSITIVE) | |
230 | d_invalidate(dentry); | |
231 | ||
40d06e3c | 232 | spl_fstrans_unmark(cookie); |
81e97e21 | 233 | crfree(cr); |
ee154f01 BB |
234 | ASSERT3S(error, <=, 0); |
235 | ||
236 | return (error); | |
237 | } | |
238 | ||
239 | static int | |
b39d3b9f | 240 | zpl_mkdir(struct inode *dir, struct dentry *dentry, zpl_umode_t mode) |
ee154f01 | 241 | { |
81e97e21 | 242 | cred_t *cr = CRED(); |
ee154f01 BB |
243 | vattr_t *vap; |
244 | struct inode *ip; | |
245 | int error; | |
40d06e3c | 246 | fstrans_cookie_t cookie; |
ee154f01 | 247 | |
81e97e21 | 248 | crhold(cr); |
d1d7e268 | 249 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 250 | zpl_vap_init(vap, dir, mode | S_IFDIR, cr); |
ee154f01 | 251 | |
40d06e3c | 252 | cookie = spl_fstrans_mark(); |
ee154f01 | 253 | error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL); |
023699cd | 254 | if (error == 0) { |
7b3e34ba | 255 | d_instantiate(dentry, ip); |
214806c7 DL |
256 | |
257 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
258 | if (error == 0) | |
259 | error = zpl_init_acl(ip, dir); | |
260 | ||
261 | if (error) | |
262 | (void) zfs_rmdir(dir, dname(dentry), NULL, cr, 0); | |
023699cd | 263 | } |
7b3e34ba | 264 | |
a438ff0e | 265 | spl_fstrans_unmark(cookie); |
d1d7e268 | 266 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 267 | crfree(cr); |
ee154f01 BB |
268 | ASSERT3S(error, <=, 0); |
269 | ||
270 | return (error); | |
271 | } | |
272 | ||
273 | static int | |
274 | zpl_rmdir(struct inode * dir, struct dentry *dentry) | |
275 | { | |
81e97e21 | 276 | cred_t *cr = CRED(); |
ee154f01 | 277 | int error; |
40d06e3c | 278 | fstrans_cookie_t cookie; |
9d36cdb6 | 279 | zfs_sb_t *zsb = dentry->d_sb->s_fs_info; |
ee154f01 | 280 | |
81e97e21 | 281 | crhold(cr); |
40d06e3c | 282 | cookie = spl_fstrans_mark(); |
ee154f01 | 283 | error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0); |
9d36cdb6 RS |
284 | |
285 | /* | |
286 | * For a CI FS we must invalidate the dentry to prevent the | |
287 | * creation of negative entries. | |
288 | */ | |
289 | if (error == 0 && zsb->z_case == ZFS_CASE_INSENSITIVE) | |
290 | d_invalidate(dentry); | |
291 | ||
40d06e3c | 292 | spl_fstrans_unmark(cookie); |
81e97e21 | 293 | crfree(cr); |
ee154f01 BB |
294 | ASSERT3S(error, <=, 0); |
295 | ||
296 | return (error); | |
297 | } | |
298 | ||
299 | static int | |
300 | zpl_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) | |
301 | { | |
ee154f01 | 302 | int error; |
40d06e3c | 303 | fstrans_cookie_t cookie; |
ee154f01 | 304 | |
40d06e3c | 305 | cookie = spl_fstrans_mark(); |
057e8eee | 306 | error = -zfs_getattr_fast(dentry->d_inode, stat); |
40d06e3c | 307 | spl_fstrans_unmark(cookie); |
ee154f01 BB |
308 | ASSERT3S(error, <=, 0); |
309 | ||
310 | return (error); | |
311 | } | |
312 | ||
313 | static int | |
5484965a | 314 | zpl_setattr(struct dentry *dentry, struct iattr *ia) |
ee154f01 | 315 | { |
023699cd | 316 | struct inode *ip = dentry->d_inode; |
81e97e21 | 317 | cred_t *cr = CRED(); |
5484965a | 318 | vattr_t *vap; |
ee154f01 | 319 | int error; |
40d06e3c | 320 | fstrans_cookie_t cookie; |
ee154f01 | 321 | |
023699cd | 322 | error = inode_change_ok(ip, ia); |
ee154f01 BB |
323 | if (error) |
324 | return (error); | |
325 | ||
81e97e21 | 326 | crhold(cr); |
d1d7e268 | 327 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
5484965a BB |
328 | vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK; |
329 | vap->va_mode = ia->ia_mode; | |
570d6edf RY |
330 | vap->va_uid = KUID_TO_SUID(ia->ia_uid); |
331 | vap->va_gid = KGID_TO_SGID(ia->ia_gid); | |
5484965a BB |
332 | vap->va_size = ia->ia_size; |
333 | vap->va_atime = ia->ia_atime; | |
334 | vap->va_mtime = ia->ia_mtime; | |
335 | vap->va_ctime = ia->ia_ctime; | |
336 | ||
704cd075 | 337 | if (vap->va_mask & ATTR_ATIME) |
87f9371a NB |
338 | ip->i_atime = timespec_trunc(ia->ia_atime, |
339 | ip->i_sb->s_time_gran); | |
704cd075 | 340 | |
40d06e3c | 341 | cookie = spl_fstrans_mark(); |
023699cd MM |
342 | error = -zfs_setattr(ip, vap, 0, cr); |
343 | if (!error && (ia->ia_valid & ATTR_MODE)) | |
344 | error = zpl_chmod_acl(ip); | |
5484965a | 345 | |
a438ff0e | 346 | spl_fstrans_unmark(cookie); |
d1d7e268 | 347 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 348 | crfree(cr); |
ee154f01 BB |
349 | ASSERT3S(error, <=, 0); |
350 | ||
5484965a | 351 | return (error); |
ee154f01 BB |
352 | } |
353 | ||
354 | static int | |
355 | zpl_rename(struct inode *sdip, struct dentry *sdentry, | |
356 | struct inode *tdip, struct dentry *tdentry) | |
357 | { | |
81e97e21 | 358 | cred_t *cr = CRED(); |
ee154f01 | 359 | int error; |
40d06e3c | 360 | fstrans_cookie_t cookie; |
ee154f01 | 361 | |
81e97e21 | 362 | crhold(cr); |
40d06e3c | 363 | cookie = spl_fstrans_mark(); |
ee154f01 | 364 | error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0); |
40d06e3c | 365 | spl_fstrans_unmark(cookie); |
81e97e21 | 366 | crfree(cr); |
ee154f01 BB |
367 | ASSERT3S(error, <=, 0); |
368 | ||
369 | return (error); | |
370 | } | |
371 | ||
372 | static int | |
373 | zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name) | |
374 | { | |
81e97e21 | 375 | cred_t *cr = CRED(); |
ee154f01 BB |
376 | vattr_t *vap; |
377 | struct inode *ip; | |
378 | int error; | |
40d06e3c | 379 | fstrans_cookie_t cookie; |
ee154f01 | 380 | |
81e97e21 | 381 | crhold(cr); |
d1d7e268 | 382 | vap = kmem_zalloc(sizeof (vattr_t), KM_SLEEP); |
7b3e34ba | 383 | zpl_vap_init(vap, dir, S_IFLNK | S_IRWXUGO, cr); |
ee154f01 | 384 | |
40d06e3c | 385 | cookie = spl_fstrans_mark(); |
ee154f01 | 386 | error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0); |
227bc969 | 387 | if (error == 0) { |
7b3e34ba | 388 | d_instantiate(dentry, ip); |
214806c7 DL |
389 | |
390 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
391 | if (error) | |
da5e151f | 392 | (void) zfs_remove(dir, dname(dentry), cr, 0); |
227bc969 | 393 | } |
7b3e34ba | 394 | |
a438ff0e | 395 | spl_fstrans_unmark(cookie); |
d1d7e268 | 396 | kmem_free(vap, sizeof (vattr_t)); |
81e97e21 | 397 | crfree(cr); |
ee154f01 BB |
398 | ASSERT3S(error, <=, 0); |
399 | ||
400 | return (error); | |
401 | } | |
402 | ||
beeed459 BB |
403 | #if defined(HAVE_PUT_LINK_COOKIE) |
404 | static void | |
405 | zpl_put_link(struct inode *unused, void *cookie) | |
406 | { | |
407 | kmem_free(cookie, MAXPATHLEN); | |
408 | } | |
409 | #elif defined(HAVE_PUT_LINK_NAMEIDATA) | |
410 | static void | |
411 | zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) | |
412 | { | |
413 | const char *link = nd_get_link(nd); | |
414 | ||
415 | if (!IS_ERR(link)) | |
416 | kmem_free(link, MAXPATHLEN); | |
417 | } | |
418 | #elif defined(HAVE_PUT_LINK_DELAYED) | |
419 | static void | |
420 | zpl_put_link(void *ptr) | |
421 | { | |
422 | kmem_free(ptr, MAXPATHLEN); | |
423 | } | |
bd29109f | 424 | #endif |
beeed459 BB |
425 | |
426 | static int | |
427 | zpl_get_link_common(struct dentry *dentry, struct inode *ip, char **link) | |
ee154f01 | 428 | { |
beeed459 | 429 | fstrans_cookie_t cookie; |
81e97e21 | 430 | cred_t *cr = CRED(); |
8b4f9a2d BB |
431 | struct iovec iov; |
432 | uio_t uio; | |
8b4f9a2d BB |
433 | int error; |
434 | ||
81e97e21 | 435 | crhold(cr); |
beeed459 | 436 | *link = NULL; |
8b4f9a2d | 437 | iov.iov_len = MAXPATHLEN; |
beeed459 | 438 | iov.iov_base = kmem_zalloc(MAXPATHLEN, KM_SLEEP); |
8b4f9a2d BB |
439 | |
440 | uio.uio_iov = &iov; | |
441 | uio.uio_iovcnt = 1; | |
5475aada | 442 | uio.uio_skip = 0; |
8b4f9a2d BB |
443 | uio.uio_resid = (MAXPATHLEN - 1); |
444 | uio.uio_segflg = UIO_SYSSPACE; | |
445 | ||
40d06e3c | 446 | cookie = spl_fstrans_mark(); |
50950001 | 447 | error = -zfs_readlink(ip, &uio, cr); |
40d06e3c | 448 | spl_fstrans_unmark(cookie); |
bd29109f BB |
449 | crfree(cr); |
450 | ||
bd29109f | 451 | if (error) |
beeed459 | 452 | kmem_free(iov.iov_base, MAXPATHLEN); |
bd29109f | 453 | else |
beeed459 | 454 | *link = iov.iov_base; |
8b4f9a2d | 455 | |
beeed459 BB |
456 | return (error); |
457 | } | |
458 | ||
459 | #if defined(HAVE_GET_LINK_DELAYED) | |
460 | const char * | |
461 | zpl_get_link(struct dentry *dentry, struct inode *inode, | |
462 | struct delayed_call *done) | |
463 | { | |
464 | char *link = NULL; | |
465 | int error; | |
466 | ||
467 | if (!dentry) | |
468 | return (ERR_PTR(-ECHILD)); | |
469 | ||
470 | error = zpl_get_link_common(dentry, inode, &link); | |
bd29109f BB |
471 | if (error) |
472 | return (ERR_PTR(error)); | |
beeed459 BB |
473 | |
474 | set_delayed_call(done, zpl_put_link, link); | |
475 | ||
476 | return (link); | |
ee154f01 | 477 | } |
beeed459 BB |
478 | #elif defined(HAVE_GET_LINK_COOKIE) |
479 | const char * | |
480 | zpl_get_link(struct dentry *dentry, struct inode *inode, void **cookie) | |
481 | { | |
482 | char *link = NULL; | |
483 | int error; | |
ee154f01 | 484 | |
beeed459 BB |
485 | if (!dentry) |
486 | return (ERR_PTR(-ECHILD)); | |
487 | ||
488 | error = zpl_get_link_common(dentry, inode, &link); | |
489 | if (error) | |
490 | return (ERR_PTR(error)); | |
491 | ||
492 | return (*cookie = link); | |
493 | } | |
494 | #elif defined(HAVE_FOLLOW_LINK_COOKIE) | |
495 | const char * | |
496 | zpl_follow_link(struct dentry *dentry, void **cookie) | |
ee154f01 | 497 | { |
beeed459 BB |
498 | char *link = NULL; |
499 | int error; | |
ee154f01 | 500 | |
beeed459 BB |
501 | error = zpl_get_link_common(dentry, dentry->d_inode, &link); |
502 | if (error) | |
503 | return (ERR_PTR(error)); | |
504 | ||
505 | return (*cookie = link); | |
ee154f01 | 506 | } |
beeed459 BB |
507 | #elif defined(HAVE_FOLLOW_LINK_NAMEIDATA) |
508 | static void * | |
509 | zpl_follow_link(struct dentry *dentry, struct nameidata *nd) | |
bd29109f | 510 | { |
beeed459 BB |
511 | char *link = NULL; |
512 | int error; | |
513 | ||
514 | error = zpl_get_link_common(dentry, dentry->d_inode, &link); | |
515 | if (error) | |
516 | nd_set_link(nd, ERR_PTR(error)); | |
517 | else | |
518 | nd_set_link(nd, link); | |
519 | ||
520 | return (NULL); | |
bd29109f BB |
521 | } |
522 | #endif | |
ee154f01 BB |
523 | |
524 | static int | |
525 | zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) | |
526 | { | |
81e97e21 | 527 | cred_t *cr = CRED(); |
ee154f01 | 528 | struct inode *ip = old_dentry->d_inode; |
ee154f01 | 529 | int error; |
40d06e3c | 530 | fstrans_cookie_t cookie; |
ee154f01 BB |
531 | |
532 | if (ip->i_nlink >= ZFS_LINK_MAX) | |
d1d7e268 | 533 | return (-EMLINK); |
ee154f01 | 534 | |
81e97e21 | 535 | crhold(cr); |
ee154f01 BB |
536 | ip->i_ctime = CURRENT_TIME_SEC; |
537 | igrab(ip); /* Use ihold() if available */ | |
538 | ||
40d06e3c | 539 | cookie = spl_fstrans_mark(); |
da5e151f | 540 | error = -zfs_link(dir, ip, dname(dentry), cr, 0); |
ee154f01 BB |
541 | if (error) { |
542 | iput(ip); | |
543 | goto out; | |
544 | } | |
545 | ||
546 | d_instantiate(dentry, ip); | |
547 | out: | |
a438ff0e | 548 | spl_fstrans_unmark(cookie); |
81e97e21 | 549 | crfree(cr); |
ee154f01 BB |
550 | ASSERT3S(error, <=, 0); |
551 | ||
552 | return (error); | |
553 | } | |
554 | ||
ea1fdf46 | 555 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 | 556 | static void |
d1d7e268 | 557 | zpl_truncate_range(struct inode *ip, loff_t start, loff_t end) |
5cb63a57 ED |
558 | { |
559 | cred_t *cr = CRED(); | |
560 | flock64_t bf; | |
40d06e3c | 561 | fstrans_cookie_t cookie; |
5cb63a57 ED |
562 | |
563 | ASSERT3S(start, <=, end); | |
564 | ||
565 | /* | |
566 | * zfs_freesp() will interpret (len == 0) as meaning "truncate until | |
567 | * the end of the file". We don't want that. | |
568 | */ | |
569 | if (start == end) | |
570 | return; | |
571 | ||
572 | crhold(cr); | |
573 | ||
574 | bf.l_type = F_WRLCK; | |
575 | bf.l_whence = 0; | |
576 | bf.l_start = start; | |
577 | bf.l_len = end - start; | |
578 | bf.l_pid = 0; | |
40d06e3c | 579 | cookie = spl_fstrans_mark(); |
5cb63a57 | 580 | zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr); |
40d06e3c | 581 | spl_fstrans_unmark(cookie); |
5cb63a57 ED |
582 | |
583 | crfree(cr); | |
584 | } | |
ea1fdf46 | 585 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
5cb63a57 | 586 | |
cb2d1901 ED |
587 | #ifdef HAVE_INODE_FALLOCATE |
588 | static long | |
589 | zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len) | |
590 | { | |
d1d7e268 | 591 | return (zpl_fallocate_common(ip, mode, offset, len)); |
cb2d1901 ED |
592 | } |
593 | #endif /* HAVE_INODE_FALLOCATE */ | |
594 | ||
7b3e34ba BB |
595 | static int |
596 | #ifdef HAVE_D_REVALIDATE_NAMEIDATA | |
597 | zpl_revalidate(struct dentry *dentry, struct nameidata *nd) | |
598 | { | |
09a661e9 | 599 | unsigned int flags = (nd ? nd->flags : 0); |
7b3e34ba BB |
600 | #else |
601 | zpl_revalidate(struct dentry *dentry, unsigned int flags) | |
602 | { | |
603 | #endif /* HAVE_D_REVALIDATE_NAMEIDATA */ | |
604 | zfs_sb_t *zsb = dentry->d_sb->s_fs_info; | |
605 | int error; | |
606 | ||
607 | if (flags & LOOKUP_RCU) | |
608 | return (-ECHILD); | |
609 | ||
278bee93 BB |
610 | /* |
611 | * Automounted snapshots rely on periodic dentry revalidation | |
612 | * to defer snapshots from being automatically unmounted. | |
613 | */ | |
614 | if (zsb->z_issnap) { | |
615 | if (time_after(jiffies, zsb->z_snap_defer_time + | |
616 | MAX(zfs_expire_snapshot * HZ / 2, HZ))) { | |
617 | zsb->z_snap_defer_time = jiffies; | |
24ef51f6 | 618 | zfsctl_snapshot_unmount_delay(zsb->z_os->os_spa, |
278bee93 BB |
619 | dmu_objset_id(zsb->z_os), zfs_expire_snapshot); |
620 | } | |
621 | } | |
622 | ||
7b3e34ba BB |
623 | /* |
624 | * After a rollback negative dentries created before the rollback | |
625 | * time must be invalidated. Otherwise they can obscure files which | |
626 | * are only present in the rolled back dataset. | |
627 | */ | |
628 | if (dentry->d_inode == NULL) { | |
629 | spin_lock(&dentry->d_lock); | |
630 | error = time_before(dentry->d_time, zsb->z_rollback_time); | |
631 | spin_unlock(&dentry->d_lock); | |
632 | ||
633 | if (error) | |
634 | return (0); | |
635 | } | |
636 | ||
637 | /* | |
638 | * The dentry may reference a stale inode if a mounted file system | |
639 | * was rolled back to a point in time where the object didn't exist. | |
640 | */ | |
641 | if (dentry->d_inode && ITOZ(dentry->d_inode)->z_is_stale) | |
642 | return (0); | |
643 | ||
644 | return (1); | |
645 | } | |
cb2d1901 | 646 | |
ee154f01 | 647 | const struct inode_operations zpl_inode_operations = { |
ee154f01 BB |
648 | .create = zpl_create, |
649 | .link = zpl_link, | |
650 | .unlink = zpl_unlink, | |
651 | .symlink = zpl_symlink, | |
652 | .mkdir = zpl_mkdir, | |
653 | .rmdir = zpl_rmdir, | |
654 | .mknod = zpl_mknod, | |
655 | .rename = zpl_rename, | |
656 | .setattr = zpl_setattr, | |
657 | .getattr = zpl_getattr, | |
658 | .setxattr = generic_setxattr, | |
659 | .getxattr = generic_getxattr, | |
660 | .removexattr = generic_removexattr, | |
661 | .listxattr = zpl_xattr_list, | |
ea1fdf46 | 662 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 | 663 | .truncate_range = zpl_truncate_range, |
ea1fdf46 | 664 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
cb2d1901 ED |
665 | #ifdef HAVE_INODE_FALLOCATE |
666 | .fallocate = zpl_fallocate, | |
667 | #endif /* HAVE_INODE_FALLOCATE */ | |
b695c34e | 668 | #if defined(CONFIG_FS_POSIX_ACL) |
023699cd MM |
669 | #if defined(HAVE_GET_ACL) |
670 | .get_acl = zpl_get_acl, | |
671 | #elif defined(HAVE_CHECK_ACL) | |
672 | .check_acl = zpl_check_acl, | |
673 | #elif defined(HAVE_PERMISSION) | |
674 | .permission = zpl_permission, | |
675 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 676 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 BB |
677 | }; |
678 | ||
679 | const struct inode_operations zpl_dir_inode_operations = { | |
ee154f01 BB |
680 | .create = zpl_create, |
681 | .lookup = zpl_lookup, | |
682 | .link = zpl_link, | |
683 | .unlink = zpl_unlink, | |
684 | .symlink = zpl_symlink, | |
685 | .mkdir = zpl_mkdir, | |
686 | .rmdir = zpl_rmdir, | |
687 | .mknod = zpl_mknod, | |
688 | .rename = zpl_rename, | |
689 | .setattr = zpl_setattr, | |
a6695d83 BB |
690 | .getattr = zpl_getattr, |
691 | .setxattr = generic_setxattr, | |
692 | .getxattr = generic_getxattr, | |
693 | .removexattr = generic_removexattr, | |
694 | .listxattr = zpl_xattr_list, | |
b695c34e | 695 | #if defined(CONFIG_FS_POSIX_ACL) |
023699cd MM |
696 | #if defined(HAVE_GET_ACL) |
697 | .get_acl = zpl_get_acl, | |
698 | #elif defined(HAVE_CHECK_ACL) | |
699 | .check_acl = zpl_check_acl, | |
700 | #elif defined(HAVE_PERMISSION) | |
701 | .permission = zpl_permission, | |
702 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 703 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 BB |
704 | }; |
705 | ||
706 | const struct inode_operations zpl_symlink_inode_operations = { | |
ee154f01 | 707 | .readlink = generic_readlink, |
beeed459 BB |
708 | #if defined(HAVE_GET_LINK_DELAYED) || defined(HAVE_GET_LINK_COOKIE) |
709 | .get_link = zpl_get_link, | |
710 | #elif defined(HAVE_FOLLOW_LINK_COOKIE) || defined(HAVE_FOLLOW_LINK_NAMEIDATA) | |
ee154f01 | 711 | .follow_link = zpl_follow_link, |
beeed459 BB |
712 | #endif |
713 | #if defined(HAVE_PUT_LINK_COOKIE) || defined(HAVE_PUT_LINK_NAMEIDATA) | |
ee154f01 | 714 | .put_link = zpl_put_link, |
beeed459 | 715 | #endif |
6f2255ba BB |
716 | .setattr = zpl_setattr, |
717 | .getattr = zpl_getattr, | |
f31b3ebe BB |
718 | .setxattr = generic_setxattr, |
719 | .getxattr = generic_getxattr, | |
720 | .removexattr = generic_removexattr, | |
721 | .listxattr = zpl_xattr_list, | |
ee154f01 BB |
722 | }; |
723 | ||
724 | const struct inode_operations zpl_special_inode_operations = { | |
a6695d83 BB |
725 | .setattr = zpl_setattr, |
726 | .getattr = zpl_getattr, | |
727 | .setxattr = generic_setxattr, | |
728 | .getxattr = generic_getxattr, | |
729 | .removexattr = generic_removexattr, | |
730 | .listxattr = zpl_xattr_list, | |
b695c34e | 731 | #if defined(CONFIG_FS_POSIX_ACL) |
023699cd MM |
732 | #if defined(HAVE_GET_ACL) |
733 | .get_acl = zpl_get_acl, | |
734 | #elif defined(HAVE_CHECK_ACL) | |
735 | .check_acl = zpl_check_acl, | |
736 | #elif defined(HAVE_PERMISSION) | |
737 | .permission = zpl_permission, | |
738 | #endif /* HAVE_GET_ACL | HAVE_CHECK_ACL | HAVE_PERMISSION */ | |
b695c34e | 739 | #endif /* CONFIG_FS_POSIX_ACL */ |
ee154f01 | 740 | }; |
7b3e34ba BB |
741 | |
742 | dentry_operations_t zpl_dentry_operations = { | |
743 | .d_revalidate = zpl_revalidate, | |
744 | }; |