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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. | |
23 | */ | |
24 | ||
25 | ||
26 | #include <sys/zfs_vfsops.h> | |
27 | #include <sys/zfs_vnops.h> | |
ebe7e575 | 28 | #include <sys/zfs_znode.h> |
ee154f01 BB |
29 | #include <sys/vfs.h> |
30 | #include <sys/zpl.h> | |
31 | ||
32 | ||
33 | static struct dentry * | |
8f195a90 | 34 | #ifdef HAVE_LOOKUP_NAMEIDATA |
ee154f01 | 35 | zpl_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
8f195a90 YS |
36 | #else |
37 | zpl_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) | |
38 | #endif | |
ee154f01 | 39 | { |
81e97e21 | 40 | cred_t *cr = CRED(); |
ee154f01 | 41 | struct inode *ip; |
ee154f01 BB |
42 | int error; |
43 | ||
81e97e21 | 44 | crhold(cr); |
ee154f01 BB |
45 | error = -zfs_lookup(dir, dname(dentry), &ip, 0, cr, NULL, NULL); |
46 | ASSERT3S(error, <=, 0); | |
81e97e21 | 47 | crfree(cr); |
ee154f01 BB |
48 | |
49 | if (error) { | |
50 | if (error == -ENOENT) | |
51 | return d_splice_alias(NULL, dentry); | |
52 | else | |
53 | return ERR_PTR(error); | |
54 | } | |
55 | ||
56 | return d_splice_alias(ip, dentry); | |
57 | } | |
58 | ||
ebe7e575 | 59 | void |
9fd91dae | 60 | zpl_vap_init(vattr_t *vap, struct inode *dir, struct dentry *dentry, |
b39d3b9f | 61 | zpl_umode_t mode, cred_t *cr) |
9fd91dae BB |
62 | { |
63 | vap->va_mask = ATTR_MODE; | |
64 | vap->va_mode = mode; | |
65 | vap->va_dentry = dentry; | |
66 | vap->va_uid = crgetfsuid(cr); | |
67 | ||
68 | if (dir && dir->i_mode & S_ISGID) { | |
69 | vap->va_gid = dir->i_gid; | |
70 | if (S_ISDIR(mode)) | |
71 | vap->va_mode |= S_ISGID; | |
72 | } else { | |
73 | vap->va_gid = crgetfsgid(cr); | |
74 | } | |
75 | } | |
76 | ||
ee154f01 | 77 | static int |
558ef6d0 | 78 | #ifdef HAVE_CREATE_NAMEIDATA |
b39d3b9f | 79 | zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, |
ee154f01 | 80 | struct nameidata *nd) |
558ef6d0 YS |
81 | #else |
82 | zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, | |
83 | bool flag) | |
84 | #endif | |
ee154f01 | 85 | { |
81e97e21 | 86 | cred_t *cr = CRED(); |
ee154f01 BB |
87 | struct inode *ip; |
88 | vattr_t *vap; | |
89 | int error; | |
90 | ||
81e97e21 | 91 | crhold(cr); |
ee154f01 | 92 | vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP); |
9fd91dae | 93 | zpl_vap_init(vap, dir, dentry, mode, cr); |
ee154f01 | 94 | |
e89260a1 BB |
95 | error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL); |
96 | if (error == 0) { | |
97 | error = zpl_xattr_security_init(ip, dir, &dentry->d_name); | |
98 | VERIFY3S(error, ==, 0); | |
99 | } | |
100 | ||
ee154f01 | 101 | kmem_free(vap, sizeof(vattr_t)); |
81e97e21 | 102 | crfree(cr); |
ee154f01 BB |
103 | ASSERT3S(error, <=, 0); |
104 | ||
105 | return (error); | |
106 | } | |
107 | ||
108 | static int | |
b39d3b9f BB |
109 | zpl_mknod(struct inode *dir, struct dentry *dentry, zpl_umode_t mode, |
110 | dev_t rdev) | |
ee154f01 | 111 | { |
81e97e21 | 112 | cred_t *cr = CRED(); |
ee154f01 BB |
113 | struct inode *ip; |
114 | vattr_t *vap; | |
115 | int error; | |
116 | ||
aa6d8c10 NB |
117 | /* |
118 | * We currently expect Linux to supply rdev=0 for all sockets | |
119 | * and fifos, but we want to know if this behavior ever changes. | |
120 | */ | |
121 | if (S_ISSOCK(mode) || S_ISFIFO(mode)) | |
122 | ASSERT(rdev == 0); | |
123 | ||
81e97e21 | 124 | crhold(cr); |
ee154f01 | 125 | vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP); |
9fd91dae | 126 | zpl_vap_init(vap, dir, dentry, mode, cr); |
ee154f01 | 127 | vap->va_rdev = rdev; |
ee154f01 BB |
128 | |
129 | error = -zfs_create(dir, (char *)dentry->d_name.name, | |
81e97e21 | 130 | vap, 0, mode, &ip, cr, 0, NULL); |
ee154f01 | 131 | kmem_free(vap, sizeof(vattr_t)); |
81e97e21 | 132 | crfree(cr); |
ee154f01 BB |
133 | ASSERT3S(error, <=, 0); |
134 | ||
135 | return (-error); | |
136 | } | |
137 | ||
138 | static int | |
139 | zpl_unlink(struct inode *dir, struct dentry *dentry) | |
140 | { | |
81e97e21 | 141 | cred_t *cr = CRED(); |
ee154f01 BB |
142 | int error; |
143 | ||
81e97e21 | 144 | crhold(cr); |
ee154f01 | 145 | error = -zfs_remove(dir, dname(dentry), cr); |
81e97e21 | 146 | crfree(cr); |
ee154f01 BB |
147 | ASSERT3S(error, <=, 0); |
148 | ||
149 | return (error); | |
150 | } | |
151 | ||
152 | static int | |
b39d3b9f | 153 | zpl_mkdir(struct inode *dir, struct dentry *dentry, zpl_umode_t mode) |
ee154f01 | 154 | { |
81e97e21 | 155 | cred_t *cr = CRED(); |
ee154f01 BB |
156 | vattr_t *vap; |
157 | struct inode *ip; | |
158 | int error; | |
159 | ||
81e97e21 | 160 | crhold(cr); |
ee154f01 | 161 | vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP); |
9fd91dae | 162 | zpl_vap_init(vap, dir, dentry, mode | S_IFDIR, cr); |
ee154f01 BB |
163 | |
164 | error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL); | |
ee154f01 | 165 | kmem_free(vap, sizeof(vattr_t)); |
81e97e21 | 166 | crfree(cr); |
ee154f01 BB |
167 | ASSERT3S(error, <=, 0); |
168 | ||
169 | return (error); | |
170 | } | |
171 | ||
172 | static int | |
173 | zpl_rmdir(struct inode * dir, struct dentry *dentry) | |
174 | { | |
81e97e21 | 175 | cred_t *cr = CRED(); |
ee154f01 BB |
176 | int error; |
177 | ||
81e97e21 | 178 | crhold(cr); |
ee154f01 | 179 | error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0); |
81e97e21 | 180 | crfree(cr); |
ee154f01 BB |
181 | ASSERT3S(error, <=, 0); |
182 | ||
183 | return (error); | |
184 | } | |
185 | ||
186 | static int | |
187 | zpl_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) | |
188 | { | |
ebe7e575 | 189 | boolean_t issnap = ITOZSB(dentry->d_inode)->z_issnap; |
ee154f01 BB |
190 | int error; |
191 | ||
ebe7e575 BB |
192 | /* |
193 | * Ensure MNT_SHRINKABLE is set on snapshots to ensure they are | |
194 | * unmounted automatically with the parent file system. This | |
195 | * is done on the first getattr because it's not easy to get the | |
196 | * vfsmount structure at mount time. This call path is explicitly | |
197 | * marked unlikely to avoid any performance impact. FWIW, ext4 | |
198 | * resorts to a similar trick for sysadmin convenience. | |
199 | */ | |
200 | if (unlikely(issnap && !(mnt->mnt_flags & MNT_SHRINKABLE))) | |
201 | mnt->mnt_flags |= MNT_SHRINKABLE; | |
202 | ||
057e8eee | 203 | error = -zfs_getattr_fast(dentry->d_inode, stat); |
ee154f01 BB |
204 | ASSERT3S(error, <=, 0); |
205 | ||
206 | return (error); | |
207 | } | |
208 | ||
209 | static int | |
5484965a | 210 | zpl_setattr(struct dentry *dentry, struct iattr *ia) |
ee154f01 | 211 | { |
81e97e21 | 212 | cred_t *cr = CRED(); |
5484965a | 213 | vattr_t *vap; |
ee154f01 BB |
214 | int error; |
215 | ||
5484965a | 216 | error = inode_change_ok(dentry->d_inode, ia); |
ee154f01 BB |
217 | if (error) |
218 | return (error); | |
219 | ||
81e97e21 | 220 | crhold(cr); |
5484965a BB |
221 | vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP); |
222 | vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK; | |
223 | vap->va_mode = ia->ia_mode; | |
224 | vap->va_uid = ia->ia_uid; | |
225 | vap->va_gid = ia->ia_gid; | |
226 | vap->va_size = ia->ia_size; | |
227 | vap->va_atime = ia->ia_atime; | |
228 | vap->va_mtime = ia->ia_mtime; | |
229 | vap->va_ctime = ia->ia_ctime; | |
230 | ||
231 | error = -zfs_setattr(dentry->d_inode, vap, 0, cr); | |
232 | ||
233 | kmem_free(vap, sizeof(vattr_t)); | |
81e97e21 | 234 | crfree(cr); |
ee154f01 BB |
235 | ASSERT3S(error, <=, 0); |
236 | ||
5484965a | 237 | return (error); |
ee154f01 BB |
238 | } |
239 | ||
240 | static int | |
241 | zpl_rename(struct inode *sdip, struct dentry *sdentry, | |
242 | struct inode *tdip, struct dentry *tdentry) | |
243 | { | |
81e97e21 | 244 | cred_t *cr = CRED(); |
ee154f01 BB |
245 | int error; |
246 | ||
81e97e21 | 247 | crhold(cr); |
ee154f01 | 248 | error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0); |
81e97e21 | 249 | crfree(cr); |
ee154f01 BB |
250 | ASSERT3S(error, <=, 0); |
251 | ||
252 | return (error); | |
253 | } | |
254 | ||
255 | static int | |
256 | zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name) | |
257 | { | |
81e97e21 | 258 | cred_t *cr = CRED(); |
ee154f01 BB |
259 | vattr_t *vap; |
260 | struct inode *ip; | |
261 | int error; | |
262 | ||
81e97e21 | 263 | crhold(cr); |
ee154f01 | 264 | vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP); |
9fd91dae | 265 | zpl_vap_init(vap, dir, dentry, S_IFLNK | S_IRWXUGO, cr); |
ee154f01 BB |
266 | |
267 | error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0); | |
ee154f01 | 268 | kmem_free(vap, sizeof(vattr_t)); |
81e97e21 | 269 | crfree(cr); |
ee154f01 BB |
270 | ASSERT3S(error, <=, 0); |
271 | ||
272 | return (error); | |
273 | } | |
274 | ||
275 | static void * | |
276 | zpl_follow_link(struct dentry *dentry, struct nameidata *nd) | |
277 | { | |
81e97e21 | 278 | cred_t *cr = CRED(); |
8b4f9a2d BB |
279 | struct inode *ip = dentry->d_inode; |
280 | struct iovec iov; | |
281 | uio_t uio; | |
282 | char *link; | |
8b4f9a2d BB |
283 | int error; |
284 | ||
81e97e21 | 285 | crhold(cr); |
8b4f9a2d BB |
286 | |
287 | iov.iov_len = MAXPATHLEN; | |
288 | iov.iov_base = link = kmem_zalloc(MAXPATHLEN, KM_SLEEP); | |
289 | ||
290 | uio.uio_iov = &iov; | |
291 | uio.uio_iovcnt = 1; | |
292 | uio.uio_resid = (MAXPATHLEN - 1); | |
293 | uio.uio_segflg = UIO_SYSSPACE; | |
294 | ||
50950001 | 295 | error = -zfs_readlink(ip, &uio, cr); |
8b4f9a2d BB |
296 | if (error) { |
297 | kmem_free(link, MAXPATHLEN); | |
298 | nd_set_link(nd, ERR_PTR(error)); | |
299 | } else { | |
300 | nd_set_link(nd, link); | |
301 | } | |
302 | ||
81e97e21 | 303 | crfree(cr); |
8b4f9a2d | 304 | return (NULL); |
ee154f01 BB |
305 | } |
306 | ||
307 | static void | |
308 | zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) | |
309 | { | |
0a6b03d3 | 310 | const char *link = nd_get_link(nd); |
ee154f01 | 311 | |
ee154f01 | 312 | if (!IS_ERR(link)) |
8b4f9a2d | 313 | kmem_free(link, MAXPATHLEN); |
ee154f01 BB |
314 | } |
315 | ||
316 | static int | |
317 | zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) | |
318 | { | |
81e97e21 | 319 | cred_t *cr = CRED(); |
ee154f01 | 320 | struct inode *ip = old_dentry->d_inode; |
ee154f01 BB |
321 | int error; |
322 | ||
323 | if (ip->i_nlink >= ZFS_LINK_MAX) | |
324 | return -EMLINK; | |
325 | ||
81e97e21 | 326 | crhold(cr); |
ee154f01 BB |
327 | ip->i_ctime = CURRENT_TIME_SEC; |
328 | igrab(ip); /* Use ihold() if available */ | |
329 | ||
330 | error = -zfs_link(dir, ip, dname(dentry), cr); | |
331 | if (error) { | |
332 | iput(ip); | |
333 | goto out; | |
334 | } | |
335 | ||
336 | d_instantiate(dentry, ip); | |
337 | out: | |
81e97e21 | 338 | crfree(cr); |
ee154f01 BB |
339 | ASSERT3S(error, <=, 0); |
340 | ||
341 | return (error); | |
342 | } | |
343 | ||
ea1fdf46 | 344 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 ED |
345 | static void |
346 | zpl_truncate_range(struct inode* ip, loff_t start, loff_t end) | |
347 | { | |
348 | cred_t *cr = CRED(); | |
349 | flock64_t bf; | |
350 | ||
351 | ASSERT3S(start, <=, end); | |
352 | ||
353 | /* | |
354 | * zfs_freesp() will interpret (len == 0) as meaning "truncate until | |
355 | * the end of the file". We don't want that. | |
356 | */ | |
357 | if (start == end) | |
358 | return; | |
359 | ||
360 | crhold(cr); | |
361 | ||
362 | bf.l_type = F_WRLCK; | |
363 | bf.l_whence = 0; | |
364 | bf.l_start = start; | |
365 | bf.l_len = end - start; | |
366 | bf.l_pid = 0; | |
367 | zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr); | |
368 | ||
369 | crfree(cr); | |
370 | } | |
ea1fdf46 | 371 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
5cb63a57 | 372 | |
cb2d1901 ED |
373 | #ifdef HAVE_INODE_FALLOCATE |
374 | static long | |
375 | zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len) | |
376 | { | |
377 | return zpl_fallocate_common(ip, mode, offset, len); | |
378 | } | |
379 | #endif /* HAVE_INODE_FALLOCATE */ | |
380 | ||
381 | ||
ee154f01 | 382 | const struct inode_operations zpl_inode_operations = { |
ee154f01 BB |
383 | .create = zpl_create, |
384 | .link = zpl_link, | |
385 | .unlink = zpl_unlink, | |
386 | .symlink = zpl_symlink, | |
387 | .mkdir = zpl_mkdir, | |
388 | .rmdir = zpl_rmdir, | |
389 | .mknod = zpl_mknod, | |
390 | .rename = zpl_rename, | |
391 | .setattr = zpl_setattr, | |
392 | .getattr = zpl_getattr, | |
393 | .setxattr = generic_setxattr, | |
394 | .getxattr = generic_getxattr, | |
395 | .removexattr = generic_removexattr, | |
396 | .listxattr = zpl_xattr_list, | |
ea1fdf46 | 397 | #ifdef HAVE_INODE_TRUNCATE_RANGE |
5cb63a57 | 398 | .truncate_range = zpl_truncate_range, |
ea1fdf46 | 399 | #endif /* HAVE_INODE_TRUNCATE_RANGE */ |
cb2d1901 ED |
400 | #ifdef HAVE_INODE_FALLOCATE |
401 | .fallocate = zpl_fallocate, | |
402 | #endif /* HAVE_INODE_FALLOCATE */ | |
ee154f01 BB |
403 | }; |
404 | ||
405 | const struct inode_operations zpl_dir_inode_operations = { | |
ee154f01 BB |
406 | .create = zpl_create, |
407 | .lookup = zpl_lookup, | |
408 | .link = zpl_link, | |
409 | .unlink = zpl_unlink, | |
410 | .symlink = zpl_symlink, | |
411 | .mkdir = zpl_mkdir, | |
412 | .rmdir = zpl_rmdir, | |
413 | .mknod = zpl_mknod, | |
414 | .rename = zpl_rename, | |
415 | .setattr = zpl_setattr, | |
a6695d83 BB |
416 | .getattr = zpl_getattr, |
417 | .setxattr = generic_setxattr, | |
418 | .getxattr = generic_getxattr, | |
419 | .removexattr = generic_removexattr, | |
420 | .listxattr = zpl_xattr_list, | |
ee154f01 BB |
421 | }; |
422 | ||
423 | const struct inode_operations zpl_symlink_inode_operations = { | |
ee154f01 BB |
424 | .readlink = generic_readlink, |
425 | .follow_link = zpl_follow_link, | |
426 | .put_link = zpl_put_link, | |
6f2255ba BB |
427 | .setattr = zpl_setattr, |
428 | .getattr = zpl_getattr, | |
f31b3ebe BB |
429 | .setxattr = generic_setxattr, |
430 | .getxattr = generic_getxattr, | |
431 | .removexattr = generic_removexattr, | |
432 | .listxattr = zpl_xattr_list, | |
ee154f01 BB |
433 | }; |
434 | ||
435 | const struct inode_operations zpl_special_inode_operations = { | |
a6695d83 BB |
436 | .setattr = zpl_setattr, |
437 | .getattr = zpl_getattr, | |
438 | .setxattr = generic_setxattr, | |
439 | .getxattr = generic_getxattr, | |
440 | .removexattr = generic_removexattr, | |
441 | .listxattr = zpl_xattr_list, | |
ee154f01 | 442 | }; |