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