Commit | Line | Data |
---|---|---|
2bad8471 EVH |
1 | /* |
2 | * linux/fs/9p/vfs_inode.c | |
3 | * | |
73c592b9 | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
2bad8471 EVH |
5 | * |
6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
42e8c509 EVH |
10 | * it under the terms of the GNU General Public License version 2 |
11 | * as published by the Free Software Foundation. | |
2bad8471 EVH |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
5d385153 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
2bad8471 EVH |
28 | #include <linux/module.h> |
29 | #include <linux/errno.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/file.h> | |
32 | #include <linux/pagemap.h> | |
33 | #include <linux/stat.h> | |
34 | #include <linux/string.h> | |
2bad8471 EVH |
35 | #include <linux/inet.h> |
36 | #include <linux/namei.h> | |
37 | #include <linux/idr.h> | |
e8edc6e0 | 38 | #include <linux/sched.h> |
5a0e3ad6 | 39 | #include <linux/slab.h> |
ebf46264 | 40 | #include <linux/xattr.h> |
85ff872d | 41 | #include <linux/posix_acl.h> |
bd238fb4 LI |
42 | #include <net/9p/9p.h> |
43 | #include <net/9p/client.h> | |
2bad8471 | 44 | |
2bad8471 | 45 | #include "v9fs.h" |
2bad8471 | 46 | #include "v9fs_vfs.h" |
2bad8471 | 47 | #include "fid.h" |
60e78d2c | 48 | #include "cache.h" |
ebf46264 | 49 | #include "xattr.h" |
85ff872d | 50 | #include "acl.h" |
2bad8471 | 51 | |
754661f1 | 52 | static const struct inode_operations v9fs_dir_inode_operations; |
9b6533c9 | 53 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
754661f1 AV |
54 | static const struct inode_operations v9fs_file_inode_operations; |
55 | static const struct inode_operations v9fs_symlink_inode_operations; | |
f5fc6145 | 56 | |
2bad8471 EVH |
57 | /** |
58 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
59 | * @v9ses: v9fs session information | |
60 | * @mode: mode to convert | |
61 | * | |
62 | */ | |
63 | ||
3eda0de6 | 64 | static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) |
2bad8471 EVH |
65 | { |
66 | int res; | |
67 | res = mode & 0777; | |
68 | if (S_ISDIR(mode)) | |
bd238fb4 | 69 | res |= P9_DMDIR; |
dd6102fb | 70 | if (v9fs_proto_dotu(v9ses)) { |
2bad8471 EVH |
71 | if (v9ses->nodev == 0) { |
72 | if (S_ISSOCK(mode)) | |
bd238fb4 | 73 | res |= P9_DMSOCKET; |
2bad8471 | 74 | if (S_ISFIFO(mode)) |
bd238fb4 | 75 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 76 | if (S_ISBLK(mode)) |
bd238fb4 | 77 | res |= P9_DMDEVICE; |
2bad8471 | 78 | if (S_ISCHR(mode)) |
bd238fb4 | 79 | res |= P9_DMDEVICE; |
2bad8471 EVH |
80 | } |
81 | ||
82 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 83 | res |= P9_DMSETUID; |
2bad8471 | 84 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 85 | res |= P9_DMSETGID; |
d199d652 AL |
86 | if ((mode & S_ISVTX) == S_ISVTX) |
87 | res |= P9_DMSETVTX; | |
2bad8471 | 88 | } |
2bad8471 EVH |
89 | return res; |
90 | } | |
91 | ||
df345c67 AK |
92 | /** |
93 | * p9mode2perm- convert plan9 mode bits to unix permission bits | |
94 | * @v9ses: v9fs session information | |
95 | * @stat: p9_wstat from which mode need to be derived | |
96 | * | |
97 | */ | |
98 | static int p9mode2perm(struct v9fs_session_info *v9ses, | |
99 | struct p9_wstat *stat) | |
100 | { | |
101 | int res; | |
102 | int mode = stat->mode; | |
103 | ||
104 | res = mode & S_IALLUGO; | |
105 | if (v9fs_proto_dotu(v9ses)) { | |
106 | if ((mode & P9_DMSETUID) == P9_DMSETUID) | |
107 | res |= S_ISUID; | |
108 | ||
109 | if ((mode & P9_DMSETGID) == P9_DMSETGID) | |
110 | res |= S_ISGID; | |
111 | ||
112 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
113 | res |= S_ISVTX; | |
114 | } | |
115 | return res; | |
116 | } | |
117 | ||
2bad8471 EVH |
118 | /** |
119 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
120 | * @v9ses: v9fs session information | |
45089142 AK |
121 | * @stat: p9_wstat from which mode need to be derived |
122 | * @rdev: major number, minor number in case of device files. | |
2bad8471 EVH |
123 | * |
124 | */ | |
3eda0de6 AV |
125 | static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, |
126 | struct p9_wstat *stat, dev_t *rdev) | |
2bad8471 EVH |
127 | { |
128 | int res; | |
3eda0de6 | 129 | u32 mode = stat->mode; |
2bad8471 | 130 | |
45089142 | 131 | *rdev = 0; |
df345c67 | 132 | res = p9mode2perm(v9ses, stat); |
2bad8471 | 133 | |
bd238fb4 | 134 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 135 | res |= S_IFDIR; |
dd6102fb | 136 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 137 | res |= S_IFLNK; |
dd6102fb | 138 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
139 | && (v9ses->nodev == 0)) |
140 | res |= S_IFSOCK; | |
dd6102fb | 141 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
142 | && (v9ses->nodev == 0)) |
143 | res |= S_IFIFO; | |
dd6102fb | 144 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
45089142 AK |
145 | && (v9ses->nodev == 0)) { |
146 | char type = 0, ext[32]; | |
147 | int major = -1, minor = -1; | |
148 | ||
149 | strncpy(ext, stat->extension, sizeof(ext)); | |
150 | sscanf(ext, "%c %u %u", &type, &major, &minor); | |
151 | switch (type) { | |
152 | case 'c': | |
153 | res |= S_IFCHR; | |
154 | break; | |
155 | case 'b': | |
156 | res |= S_IFBLK; | |
157 | break; | |
158 | default: | |
5d385153 JP |
159 | p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", |
160 | type, stat->extension); | |
45089142 AK |
161 | }; |
162 | *rdev = MKDEV(major, minor); | |
163 | } else | |
2bad8471 EVH |
164 | res |= S_IFREG; |
165 | ||
2bad8471 EVH |
166 | return res; |
167 | } | |
168 | ||
ee443996 EVH |
169 | /** |
170 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
171 | * @uflags: flags to convert | |
2e4bef41 | 172 | * @extended: if .u extensions are active |
ee443996 EVH |
173 | */ |
174 | ||
2e4bef41 | 175 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
176 | { |
177 | int ret; | |
178 | ||
179 | ret = 0; | |
180 | switch (uflags&3) { | |
181 | default: | |
182 | case O_RDONLY: | |
bd238fb4 | 183 | ret = P9_OREAD; |
6a3124a3 LI |
184 | break; |
185 | ||
186 | case O_WRONLY: | |
bd238fb4 | 187 | ret = P9_OWRITE; |
6a3124a3 LI |
188 | break; |
189 | ||
190 | case O_RDWR: | |
bd238fb4 | 191 | ret = P9_ORDWR; |
6a3124a3 LI |
192 | break; |
193 | } | |
194 | ||
2e4bef41 EVH |
195 | if (extended) { |
196 | if (uflags & O_EXCL) | |
197 | ret |= P9_OEXCL; | |
198 | ||
199 | if (uflags & O_APPEND) | |
200 | ret |= P9_OAPPEND; | |
201 | } | |
6a3124a3 LI |
202 | |
203 | return ret; | |
204 | } | |
205 | ||
2bad8471 | 206 | /** |
531b1094 | 207 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 208 | * @wstat: structure to initialize |
2bad8471 EVH |
209 | * |
210 | */ | |
211 | ||
7a4439c4 | 212 | void |
bd238fb4 | 213 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 214 | { |
531b1094 LI |
215 | wstat->type = ~0; |
216 | wstat->dev = ~0; | |
217 | wstat->qid.type = ~0; | |
218 | wstat->qid.version = ~0; | |
219 | *((long long *)&wstat->qid.path) = ~0; | |
220 | wstat->mode = ~0; | |
221 | wstat->atime = ~0; | |
222 | wstat->mtime = ~0; | |
223 | wstat->length = ~0; | |
224 | wstat->name = NULL; | |
225 | wstat->uid = NULL; | |
226 | wstat->gid = NULL; | |
227 | wstat->muid = NULL; | |
447c5094 EB |
228 | wstat->n_uid = INVALID_UID; |
229 | wstat->n_gid = INVALID_GID; | |
230 | wstat->n_muid = INVALID_UID; | |
531b1094 | 231 | wstat->extension = NULL; |
2bad8471 EVH |
232 | } |
233 | ||
60e78d2c AK |
234 | /** |
235 | * v9fs_alloc_inode - helper function to allocate an inode | |
60e78d2c AK |
236 | * |
237 | */ | |
60e78d2c AK |
238 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
239 | { | |
a78ce05d AK |
240 | struct v9fs_inode *v9inode; |
241 | v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, | |
242 | GFP_KERNEL); | |
243 | if (!v9inode) | |
60e78d2c | 244 | return NULL; |
a78ce05d AK |
245 | #ifdef CONFIG_9P_FSCACHE |
246 | v9inode->fscache = NULL; | |
a78ce05d AK |
247 | spin_lock_init(&v9inode->fscache_lock); |
248 | #endif | |
6b39f6d2 | 249 | v9inode->writeback_fid = NULL; |
b3cbea03 | 250 | v9inode->cache_validity = 0; |
5a7e0a8c | 251 | mutex_init(&v9inode->v_mutex); |
a78ce05d | 252 | return &v9inode->vfs_inode; |
60e78d2c AK |
253 | } |
254 | ||
255 | /** | |
256 | * v9fs_destroy_inode - destroy an inode | |
257 | * | |
258 | */ | |
259 | ||
fa0d7e3d | 260 | static void v9fs_i_callback(struct rcu_head *head) |
60e78d2c | 261 | { |
fa0d7e3d | 262 | struct inode *inode = container_of(head, struct inode, i_rcu); |
a78ce05d | 263 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 264 | } |
fa0d7e3d NP |
265 | |
266 | void v9fs_destroy_inode(struct inode *inode) | |
267 | { | |
268 | call_rcu(&inode->i_rcu, v9fs_i_callback); | |
269 | } | |
60e78d2c | 270 | |
5ffc0cb3 | 271 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
3eda0de6 | 272 | struct inode *inode, umode_t mode, dev_t rdev) |
2bad8471 | 273 | { |
5ffc0cb3 | 274 | int err = 0; |
2bb54115 | 275 | |
217f206d | 276 | inode_init_owner(inode, NULL, mode); |
2bb54115 | 277 | inode->i_blocks = 0; |
45089142 | 278 | inode->i_rdev = rdev; |
2bb54115 AK |
279 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
280 | inode->i_mapping->a_ops = &v9fs_addr_operations; | |
281 | ||
282 | switch (mode & S_IFMT) { | |
283 | case S_IFIFO: | |
284 | case S_IFBLK: | |
285 | case S_IFCHR: | |
286 | case S_IFSOCK: | |
4b43516a MK |
287 | if (v9fs_proto_dotl(v9ses)) { |
288 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
4b43516a MK |
289 | } else if (v9fs_proto_dotu(v9ses)) { |
290 | inode->i_op = &v9fs_file_inode_operations; | |
4b43516a | 291 | } else { |
5d385153 JP |
292 | p9_debug(P9_DEBUG_ERROR, |
293 | "special files without extended mode\n"); | |
2bb54115 AK |
294 | err = -EINVAL; |
295 | goto error; | |
2bad8471 | 296 | } |
2bb54115 AK |
297 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
298 | break; | |
299 | case S_IFREG: | |
9b6533c9 SK |
300 | if (v9fs_proto_dotl(v9ses)) { |
301 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
29236f4e AK |
302 | if (v9ses->cache) |
303 | inode->i_fop = | |
304 | &v9fs_cached_file_operations_dotl; | |
305 | else | |
306 | inode->i_fop = &v9fs_file_operations_dotl; | |
9b6533c9 SK |
307 | } else { |
308 | inode->i_op = &v9fs_file_inode_operations; | |
29236f4e AK |
309 | if (v9ses->cache) |
310 | inode->i_fop = &v9fs_cached_file_operations; | |
311 | else | |
312 | inode->i_fop = &v9fs_file_operations; | |
9b6533c9 SK |
313 | } |
314 | ||
2bb54115 AK |
315 | break; |
316 | case S_IFLNK: | |
9b6533c9 | 317 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
5d385153 JP |
318 | p9_debug(P9_DEBUG_ERROR, |
319 | "extended modes used with legacy protocol\n"); | |
2bb54115 AK |
320 | err = -EINVAL; |
321 | goto error; | |
322 | } | |
9b6533c9 SK |
323 | |
324 | if (v9fs_proto_dotl(v9ses)) | |
325 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
326 | else | |
327 | inode->i_op = &v9fs_symlink_inode_operations; | |
328 | ||
2bb54115 AK |
329 | break; |
330 | case S_IFDIR: | |
331 | inc_nlink(inode); | |
9b6533c9 SK |
332 | if (v9fs_proto_dotl(v9ses)) |
333 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
334 | else if (v9fs_proto_dotu(v9ses)) | |
335 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
336 | else |
337 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
338 | |
339 | if (v9fs_proto_dotl(v9ses)) | |
340 | inode->i_fop = &v9fs_dir_operations_dotl; | |
341 | else | |
342 | inode->i_fop = &v9fs_dir_operations; | |
343 | ||
2bb54115 AK |
344 | break; |
345 | default: | |
609eac1c | 346 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", |
5d385153 | 347 | mode, mode & S_IFMT); |
2bb54115 AK |
348 | err = -EINVAL; |
349 | goto error; | |
2bad8471 | 350 | } |
5ffc0cb3 AK |
351 | error: |
352 | return err; | |
2bb54115 | 353 | |
5ffc0cb3 | 354 | } |
2bb54115 | 355 | |
5ffc0cb3 AK |
356 | /** |
357 | * v9fs_get_inode - helper function to setup an inode | |
358 | * @sb: superblock | |
359 | * @mode: mode to setup inode with | |
360 | * | |
361 | */ | |
362 | ||
3eda0de6 | 363 | struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) |
5ffc0cb3 AK |
364 | { |
365 | int err; | |
366 | struct inode *inode; | |
367 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
368 | ||
609eac1c | 369 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); |
5ffc0cb3 AK |
370 | |
371 | inode = new_inode(sb); | |
372 | if (!inode) { | |
5d385153 JP |
373 | pr_warn("%s (%d): Problem allocating inode\n", |
374 | __func__, task_pid_nr(current)); | |
5ffc0cb3 AK |
375 | return ERR_PTR(-ENOMEM); |
376 | } | |
45089142 | 377 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
5ffc0cb3 AK |
378 | if (err) { |
379 | iput(inode); | |
380 | return ERR_PTR(err); | |
381 | } | |
382 | return inode; | |
2bad8471 EVH |
383 | } |
384 | ||
bd238fb4 | 385 | /* |
6a3124a3 LI |
386 | static struct v9fs_fid* |
387 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
388 | { | |
389 | int err; | |
736c4b85 | 390 | int nfid; |
6a3124a3 LI |
391 | struct v9fs_fid *ret; |
392 | struct v9fs_fcall *fcall; | |
393 | ||
394 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
395 | if (nfid < 0) { | |
0b8dd177 | 396 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 397 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
398 | } |
399 | ||
6a3124a3 LI |
400 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
401 | &fcall); | |
402 | ||
403 | if (err < 0) { | |
41e5a6ac LI |
404 | if (fcall && fcall->id == RWALK) |
405 | goto clunk_fid; | |
406 | ||
6a3124a3 LI |
407 | PRINT_FCALL_ERROR("walk error", fcall); |
408 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
409 | goto error; | |
0b8dd177 | 410 | } |
6a3124a3 | 411 | |
3cf6429a LI |
412 | kfree(fcall); |
413 | fcall = NULL; | |
6a3124a3 LI |
414 | ret = v9fs_fid_create(v9ses, nfid); |
415 | if (!ret) { | |
416 | err = -ENOMEM; | |
417 | goto clunk_fid; | |
418 | } | |
0b8dd177 | 419 | |
6a3124a3 LI |
420 | err = v9fs_fid_insert(ret, dentry); |
421 | if (err < 0) { | |
422 | v9fs_fid_destroy(ret); | |
423 | goto clunk_fid; | |
0b8dd177 | 424 | } |
2bad8471 | 425 | |
6a3124a3 | 426 | return ret; |
2bad8471 | 427 | |
6a3124a3 LI |
428 | clunk_fid: |
429 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 430 | |
6a3124a3 LI |
431 | error: |
432 | kfree(fcall); | |
433 | return ERR_PTR(err); | |
434 | } | |
bd238fb4 | 435 | */ |
2bad8471 | 436 | |
60e78d2c AK |
437 | |
438 | /** | |
439 | * v9fs_clear_inode - release an inode | |
440 | * @inode: inode to release | |
441 | * | |
442 | */ | |
b57922d9 | 443 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 444 | { |
6b39f6d2 AK |
445 | struct v9fs_inode *v9inode = V9FS_I(inode); |
446 | ||
b57922d9 | 447 | truncate_inode_pages(inode->i_mapping, 0); |
dbd5768f | 448 | clear_inode(inode); |
60e78d2c AK |
449 | filemap_fdatawrite(inode->i_mapping); |
450 | ||
451 | #ifdef CONFIG_9P_FSCACHE | |
452 | v9fs_cache_inode_put_cookie(inode); | |
453 | #endif | |
6b39f6d2 AK |
454 | /* clunk the fid stashed in writeback_fid */ |
455 | if (v9inode->writeback_fid) { | |
456 | p9_client_clunk(v9inode->writeback_fid); | |
457 | v9inode->writeback_fid = NULL; | |
3cf387d7 | 458 | } |
60e78d2c AK |
459 | } |
460 | ||
fd2421f5 AK |
461 | static int v9fs_test_inode(struct inode *inode, void *data) |
462 | { | |
463 | int umode; | |
45089142 | 464 | dev_t rdev; |
fd2421f5 AK |
465 | struct v9fs_inode *v9inode = V9FS_I(inode); |
466 | struct p9_wstat *st = (struct p9_wstat *)data; | |
467 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); | |
468 | ||
45089142 | 469 | umode = p9mode2unixmode(v9ses, st, &rdev); |
fd2421f5 AK |
470 | /* don't match inode of different type */ |
471 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) | |
472 | return 0; | |
473 | ||
474 | /* compare qid details */ | |
475 | if (memcmp(&v9inode->qid.version, | |
476 | &st->qid.version, sizeof(v9inode->qid.version))) | |
477 | return 0; | |
478 | ||
479 | if (v9inode->qid.type != st->qid.type) | |
480 | return 0; | |
481 | return 1; | |
482 | } | |
483 | ||
ed80fcfa AK |
484 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
485 | { | |
486 | return 0; | |
487 | } | |
488 | ||
fd2421f5 AK |
489 | static int v9fs_set_inode(struct inode *inode, void *data) |
490 | { | |
491 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
492 | struct p9_wstat *st = (struct p9_wstat *)data; | |
493 | ||
494 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
495 | return 0; | |
496 | } | |
497 | ||
5ffc0cb3 AK |
498 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
499 | struct p9_qid *qid, | |
ed80fcfa AK |
500 | struct p9_wstat *st, |
501 | int new) | |
6a3124a3 | 502 | { |
45089142 | 503 | dev_t rdev; |
3eda0de6 AV |
504 | int retval; |
505 | umode_t umode; | |
5ffc0cb3 AK |
506 | unsigned long i_ino; |
507 | struct inode *inode; | |
508 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
ed80fcfa AK |
509 | int (*test)(struct inode *, void *); |
510 | ||
511 | if (new) | |
512 | test = v9fs_test_new_inode; | |
513 | else | |
514 | test = v9fs_test_inode; | |
2bad8471 | 515 | |
5ffc0cb3 | 516 | i_ino = v9fs_qid2ino(qid); |
ed80fcfa | 517 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
5ffc0cb3 AK |
518 | if (!inode) |
519 | return ERR_PTR(-ENOMEM); | |
520 | if (!(inode->i_state & I_NEW)) | |
521 | return inode; | |
522 | /* | |
523 | * initialize the inode with the stat info | |
524 | * FIXME!! we may need support for stale inodes | |
525 | * later. | |
526 | */ | |
fd2421f5 | 527 | inode->i_ino = i_ino; |
45089142 AK |
528 | umode = p9mode2unixmode(v9ses, st, &rdev); |
529 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); | |
5ffc0cb3 | 530 | if (retval) |
6a3124a3 | 531 | goto error; |
60e78d2c | 532 | |
5ffc0cb3 | 533 | v9fs_stat2inode(st, inode, sb); |
60e78d2c | 534 | #ifdef CONFIG_9P_FSCACHE |
5ffc0cb3 | 535 | v9fs_cache_inode_get_cookie(inode); |
60e78d2c | 536 | #endif |
5ffc0cb3 AK |
537 | unlock_new_inode(inode); |
538 | return inode; | |
6a3124a3 | 539 | error: |
5ffc0cb3 AK |
540 | unlock_new_inode(inode); |
541 | iput(inode); | |
542 | return ERR_PTR(retval); | |
543 | ||
544 | } | |
545 | ||
546 | struct inode * | |
a78ce05d | 547 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 548 | struct super_block *sb, int new) |
5ffc0cb3 AK |
549 | { |
550 | struct p9_wstat *st; | |
551 | struct inode *inode = NULL; | |
552 | ||
553 | st = p9_client_stat(fid); | |
554 | if (IS_ERR(st)) | |
555 | return ERR_CAST(st); | |
556 | ||
ed80fcfa | 557 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
02bc3567 | 558 | p9stat_free(st); |
bd238fb4 | 559 | kfree(st); |
5ffc0cb3 | 560 | return inode; |
2bad8471 EVH |
561 | } |
562 | ||
f88657ce AK |
563 | /** |
564 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to | |
565 | * plan 9 AT flag. | |
566 | * @flags: flags to convert | |
567 | */ | |
568 | static int v9fs_at_to_dotl_flags(int flags) | |
569 | { | |
570 | int rflags = 0; | |
571 | if (flags & AT_REMOVEDIR) | |
572 | rflags |= P9_DOTL_AT_REMOVEDIR; | |
573 | return rflags; | |
574 | } | |
575 | ||
2bad8471 EVH |
576 | /** |
577 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 | 578 | * @dir: directory inode that is being deleted |
48e370ff | 579 | * @dentry: dentry that is being deleted |
73c592b9 | 580 | * @rmdir: removing a directory |
2bad8471 EVH |
581 | * |
582 | */ | |
583 | ||
48e370ff | 584 | static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) |
2bad8471 | 585 | { |
48e370ff AK |
586 | struct inode *inode; |
587 | int retval = -EOPNOTSUPP; | |
588 | struct p9_fid *v9fid, *dfid; | |
589 | struct v9fs_session_info *v9ses; | |
2bad8471 | 590 | |
5d385153 JP |
591 | p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
592 | dir, dentry, flags); | |
2bad8471 | 593 | |
48e370ff AK |
594 | v9ses = v9fs_inode2v9ses(dir); |
595 | inode = dentry->d_inode; | |
596 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
597 | if (IS_ERR(dfid)) { | |
598 | retval = PTR_ERR(dfid); | |
5d385153 | 599 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
48e370ff AK |
600 | return retval; |
601 | } | |
602 | if (v9fs_proto_dotl(v9ses)) | |
f88657ce AK |
603 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
604 | v9fs_at_to_dotl_flags(flags)); | |
48e370ff AK |
605 | if (retval == -EOPNOTSUPP) { |
606 | /* Try the one based on path */ | |
607 | v9fid = v9fs_fid_clone(dentry); | |
608 | if (IS_ERR(v9fid)) | |
609 | return PTR_ERR(v9fid); | |
610 | retval = p9_client_remove(v9fid); | |
611 | } | |
b271ec47 AK |
612 | if (!retval) { |
613 | /* | |
614 | * directories on unlink should have zero | |
615 | * link count | |
616 | */ | |
48e370ff AK |
617 | if (flags & AT_REMOVEDIR) { |
618 | clear_nlink(inode); | |
b271ec47 AK |
619 | drop_nlink(dir); |
620 | } else | |
48e370ff | 621 | drop_nlink(inode); |
d28c61f0 | 622 | |
48e370ff | 623 | v9fs_invalidate_inode_attr(inode); |
d28c61f0 | 624 | v9fs_invalidate_inode_attr(dir); |
b271ec47 | 625 | } |
d994f405 | 626 | return retval; |
2bad8471 EVH |
627 | } |
628 | ||
629 | /** | |
bd238fb4 | 630 | * v9fs_create - Create a file |
ee443996 EVH |
631 | * @v9ses: session information |
632 | * @dir: directory that dentry is being created in | |
bd238fb4 | 633 | * @dentry: dentry that is being created |
0e15597e | 634 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
635 | * @perm: create permissions |
636 | * @mode: open mode | |
2bad8471 EVH |
637 | * |
638 | */ | |
bd238fb4 LI |
639 | static struct p9_fid * |
640 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
641 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 642 | { |
6a3124a3 | 643 | int err; |
bd238fb4 LI |
644 | char *name; |
645 | struct p9_fid *dfid, *ofid, *fid; | |
6a3124a3 | 646 | struct inode *inode; |
6a3124a3 | 647 | |
5d385153 | 648 | p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
51a87c55 | 649 | |
bd238fb4 LI |
650 | err = 0; |
651 | ofid = NULL; | |
652 | fid = NULL; | |
653 | name = (char *) dentry->d_name.name; | |
6d27e64d | 654 | dfid = v9fs_fid_lookup(dentry->d_parent); |
ba17674f | 655 | if (IS_ERR(dfid)) { |
da977b2c | 656 | err = PTR_ERR(dfid); |
5d385153 | 657 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
6d27e64d | 658 | return ERR_PTR(err); |
da977b2c | 659 | } |
6a3124a3 | 660 | |
bd238fb4 LI |
661 | /* clone a fid to use for creation */ |
662 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
663 | if (IS_ERR(ofid)) { | |
664 | err = PTR_ERR(ofid); | |
5d385153 | 665 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6d27e64d | 666 | return ERR_PTR(err); |
bd238fb4 | 667 | } |
6a3124a3 | 668 | |
bd238fb4 | 669 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 670 | if (err < 0) { |
5d385153 | 671 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
6a3124a3 | 672 | goto error; |
6d27e64d | 673 | } |
6a3124a3 | 674 | |
b6054793 AK |
675 | if (!(perm & P9_DMLINK)) { |
676 | /* now walk from the parent so we can get unopened fid */ | |
677 | fid = p9_client_walk(dfid, 1, &name, 1); | |
678 | if (IS_ERR(fid)) { | |
679 | err = PTR_ERR(fid); | |
680 | p9_debug(P9_DEBUG_VFS, | |
681 | "p9_client_walk failed %d\n", err); | |
682 | fid = NULL; | |
683 | goto error; | |
684 | } | |
685 | /* | |
686 | * instantiate inode and assign the unopened fid to the dentry | |
687 | */ | |
688 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
689 | if (IS_ERR(inode)) { | |
690 | err = PTR_ERR(inode); | |
691 | p9_debug(P9_DEBUG_VFS, | |
692 | "inode creation failed %d\n", err); | |
693 | goto error; | |
694 | } | |
695 | err = v9fs_fid_add(dentry, fid); | |
696 | if (err < 0) | |
697 | goto error; | |
698 | d_instantiate(dentry, inode); | |
6a3124a3 | 699 | } |
bd238fb4 | 700 | return ofid; |
bd238fb4 | 701 | error: |
bd238fb4 LI |
702 | if (ofid) |
703 | p9_client_clunk(ofid); | |
704 | ||
705 | if (fid) | |
706 | p9_client_clunk(fid); | |
707 | ||
708 | return ERR_PTR(err); | |
709 | } | |
710 | ||
711 | /** | |
e43ae79c MS |
712 | * v9fs_vfs_create - VFS hook to create a regular file |
713 | * | |
714 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called | |
715 | * for mknod(2). | |
716 | * | |
ee443996 | 717 | * @dir: directory inode that is being created |
bd238fb4 LI |
718 | * @dentry: dentry that is being deleted |
719 | * @mode: create permissions | |
bd238fb4 LI |
720 | * |
721 | */ | |
6a3124a3 | 722 | |
bd238fb4 | 723 | static int |
4acdaf27 | 724 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 725 | bool excl) |
bd238fb4 | 726 | { |
e43ae79c MS |
727 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
728 | u32 perm = unixmode2p9mode(v9ses, mode); | |
729 | struct p9_fid *fid; | |
bd238fb4 | 730 | |
e43ae79c MS |
731 | /* P9_OEXCL? */ |
732 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); | |
733 | if (IS_ERR(fid)) | |
734 | return PTR_ERR(fid); | |
bd238fb4 | 735 | |
d28c61f0 | 736 | v9fs_invalidate_inode_attr(dir); |
e43ae79c | 737 | p9_client_clunk(fid); |
6a3124a3 LI |
738 | |
739 | return 0; | |
2bad8471 EVH |
740 | } |
741 | ||
742 | /** | |
743 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 744 | * @dir: inode that is being unlinked |
2bad8471 EVH |
745 | * @dentry: dentry that is being unlinked |
746 | * @mode: mode for new directory | |
747 | * | |
748 | */ | |
749 | ||
18bb1db3 | 750 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
2bad8471 | 751 | { |
6a3124a3 | 752 | int err; |
bd238fb4 | 753 | u32 perm; |
bd238fb4 | 754 | struct p9_fid *fid; |
d28c61f0 | 755 | struct v9fs_session_info *v9ses; |
6a3124a3 | 756 | |
5d385153 | 757 | p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
bd238fb4 | 758 | err = 0; |
6a3124a3 | 759 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 760 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
761 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
762 | if (IS_ERR(fid)) { | |
763 | err = PTR_ERR(fid); | |
764 | fid = NULL; | |
d28c61f0 | 765 | } else { |
b271ec47 | 766 | inc_nlink(dir); |
d28c61f0 AK |
767 | v9fs_invalidate_inode_attr(dir); |
768 | } | |
6a3124a3 | 769 | |
bd238fb4 LI |
770 | if (fid) |
771 | p9_client_clunk(fid); | |
6a3124a3 | 772 | |
6a3124a3 | 773 | return err; |
2bad8471 EVH |
774 | } |
775 | ||
776 | /** | |
777 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
778 | * @dir: inode that is being walked from | |
779 | * @dentry: dentry that is being walked to? | |
780 | * @nameidata: path data | |
781 | * | |
782 | */ | |
783 | ||
53c06f4e | 784 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 785 | unsigned int flags) |
2bad8471 | 786 | { |
73f50717 | 787 | struct dentry *res; |
2bad8471 EVH |
788 | struct super_block *sb; |
789 | struct v9fs_session_info *v9ses; | |
bd238fb4 | 790 | struct p9_fid *dfid, *fid; |
2bad8471 | 791 | struct inode *inode; |
bd238fb4 | 792 | char *name; |
2bad8471 EVH |
793 | int result = 0; |
794 | ||
00cd8dd3 AV |
795 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n", |
796 | dir, dentry->d_name.name, dentry, flags); | |
2bad8471 | 797 | |
11e9b49b SK |
798 | if (dentry->d_name.len > NAME_MAX) |
799 | return ERR_PTR(-ENAMETOOLONG); | |
800 | ||
2bad8471 EVH |
801 | sb = dir->i_sb; |
802 | v9ses = v9fs_inode2v9ses(dir); | |
a534c8d1 | 803 | /* We can walk d_parent because we hold the dir->i_mutex */ |
bd238fb4 LI |
804 | dfid = v9fs_fid_lookup(dentry->d_parent); |
805 | if (IS_ERR(dfid)) | |
e231c2ee | 806 | return ERR_CAST(dfid); |
bd238fb4 LI |
807 | |
808 | name = (char *) dentry->d_name.name; | |
809 | fid = p9_client_walk(dfid, 1, &name, 1); | |
810 | if (IS_ERR(fid)) { | |
811 | result = PTR_ERR(fid); | |
2bad8471 | 812 | if (result == -ENOENT) { |
85e0df24 AK |
813 | inode = NULL; |
814 | goto inst_out; | |
2bad8471 | 815 | } |
2bad8471 | 816 | |
bd238fb4 | 817 | return ERR_PTR(result); |
2bad8471 | 818 | } |
73f50717 AK |
819 | /* |
820 | * Make sure we don't use a wrong inode due to parallel | |
821 | * unlink. For cached mode create calls request for new | |
822 | * inode. But with cache disabled, lookup should do this. | |
823 | */ | |
824 | if (v9ses->cache) | |
825 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); | |
826 | else | |
827 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
bd238fb4 LI |
828 | if (IS_ERR(inode)) { |
829 | result = PTR_ERR(inode); | |
830 | inode = NULL; | |
831 | goto error; | |
2bad8471 | 832 | } |
bd238fb4 | 833 | result = v9fs_fid_add(dentry, fid); |
6a3124a3 | 834 | if (result < 0) |
9856af8b | 835 | goto error_iput; |
85e0df24 | 836 | inst_out: |
73f50717 AK |
837 | /* |
838 | * If we had a rename on the server and a parallel lookup | |
839 | * for the new name, then make sure we instantiate with | |
840 | * the new name. ie look up for a/b, while on server somebody | |
841 | * moved b under k and client parallely did a lookup for | |
842 | * k/b. | |
843 | */ | |
844 | res = d_materialise_unique(dentry, inode); | |
845 | if (!IS_ERR(res)) | |
846 | return res; | |
847 | result = PTR_ERR(res); | |
9856af8b AK |
848 | error_iput: |
849 | iput(inode); | |
bd238fb4 | 850 | error: |
62aa528e | 851 | p9_client_clunk(fid); |
da977b2c | 852 | |
2bad8471 EVH |
853 | return ERR_PTR(result); |
854 | } | |
855 | ||
d9585277 | 856 | static int |
e43ae79c | 857 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
30d90494 | 858 | struct file *file, unsigned flags, umode_t mode, |
47237687 | 859 | int *opened) |
e43ae79c MS |
860 | { |
861 | int err; | |
862 | u32 perm; | |
e43ae79c MS |
863 | struct v9fs_inode *v9inode; |
864 | struct v9fs_session_info *v9ses; | |
865 | struct p9_fid *fid, *inode_fid; | |
866 | struct dentry *res = NULL; | |
867 | ||
868 | if (d_unhashed(dentry)) { | |
00cd8dd3 | 869 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 870 | if (IS_ERR(res)) |
d9585277 | 871 | return PTR_ERR(res); |
e43ae79c MS |
872 | |
873 | if (res) | |
874 | dentry = res; | |
875 | } | |
876 | ||
877 | /* Only creates */ | |
e45198a6 AV |
878 | if (!(flags & O_CREAT) || dentry->d_inode) |
879 | return finish_no_open(file, res); | |
e43ae79c MS |
880 | |
881 | err = 0; | |
882 | fid = NULL; | |
883 | v9ses = v9fs_inode2v9ses(dir); | |
884 | perm = unixmode2p9mode(v9ses, mode); | |
885 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
886 | v9fs_uflags2omode(flags, | |
887 | v9fs_proto_dotu(v9ses))); | |
888 | if (IS_ERR(fid)) { | |
889 | err = PTR_ERR(fid); | |
890 | fid = NULL; | |
891 | goto error; | |
892 | } | |
893 | ||
894 | v9fs_invalidate_inode_attr(dir); | |
895 | v9inode = V9FS_I(dentry->d_inode); | |
896 | mutex_lock(&v9inode->v_mutex); | |
897 | if (v9ses->cache && !v9inode->writeback_fid && | |
898 | ((flags & O_ACCMODE) != O_RDONLY)) { | |
899 | /* | |
900 | * clone a fid and add it to writeback_fid | |
901 | * we do it during open time instead of | |
902 | * page dirty time via write_begin/page_mkwrite | |
903 | * because we want write after unlink usecase | |
904 | * to work. | |
905 | */ | |
906 | inode_fid = v9fs_writeback_fid(dentry); | |
907 | if (IS_ERR(inode_fid)) { | |
908 | err = PTR_ERR(inode_fid); | |
909 | mutex_unlock(&v9inode->v_mutex); | |
910 | goto error; | |
911 | } | |
912 | v9inode->writeback_fid = (void *) inode_fid; | |
913 | } | |
914 | mutex_unlock(&v9inode->v_mutex); | |
30d90494 AV |
915 | err = finish_open(file, dentry, generic_file_open, opened); |
916 | if (err) | |
e43ae79c | 917 | goto error; |
e43ae79c | 918 | |
30d90494 | 919 | file->private_data = fid; |
e43ae79c MS |
920 | #ifdef CONFIG_9P_FSCACHE |
921 | if (v9ses->cache) | |
30d90494 | 922 | v9fs_cache_inode_set_cookie(dentry->d_inode, file); |
e43ae79c MS |
923 | #endif |
924 | ||
47237687 | 925 | *opened |= FILE_CREATED; |
e43ae79c MS |
926 | out: |
927 | dput(res); | |
d9585277 | 928 | return err; |
e43ae79c MS |
929 | |
930 | error: | |
931 | if (fid) | |
932 | p9_client_clunk(fid); | |
e43ae79c MS |
933 | goto out; |
934 | } | |
935 | ||
2bad8471 EVH |
936 | /** |
937 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
938 | * @i: inode that is being unlinked | |
73c592b9 | 939 | * @d: dentry that is being unlinked |
2bad8471 EVH |
940 | * |
941 | */ | |
942 | ||
53c06f4e | 943 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
944 | { |
945 | return v9fs_remove(i, d, 0); | |
946 | } | |
947 | ||
948 | /** | |
949 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
950 | * @i: inode that is being unlinked | |
73c592b9 | 951 | * @d: dentry that is being unlinked |
2bad8471 EVH |
952 | * |
953 | */ | |
954 | ||
53c06f4e | 955 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 956 | { |
48e370ff | 957 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
958 | } |
959 | ||
960 | /** | |
961 | * v9fs_vfs_rename - VFS hook to rename an inode | |
962 | * @old_dir: old dir inode | |
963 | * @old_dentry: old dentry | |
964 | * @new_dir: new dir inode | |
965 | * @new_dentry: new dentry | |
966 | * | |
967 | */ | |
968 | ||
53c06f4e | 969 | int |
2bad8471 EVH |
970 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
971 | struct inode *new_dir, struct dentry *new_dentry) | |
972 | { | |
d28c61f0 | 973 | int retval; |
bd238fb4 | 974 | struct inode *old_inode; |
b271ec47 | 975 | struct inode *new_inode; |
bd238fb4 LI |
976 | struct v9fs_session_info *v9ses; |
977 | struct p9_fid *oldfid; | |
978 | struct p9_fid *olddirfid; | |
979 | struct p9_fid *newdirfid; | |
980 | struct p9_wstat wstat; | |
2bad8471 | 981 | |
5d385153 | 982 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 LI |
983 | retval = 0; |
984 | old_inode = old_dentry->d_inode; | |
b271ec47 | 985 | new_inode = new_dentry->d_inode; |
bd238fb4 LI |
986 | v9ses = v9fs_inode2v9ses(old_inode); |
987 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 988 | if (IS_ERR(oldfid)) |
da977b2c EVH |
989 | return PTR_ERR(oldfid); |
990 | ||
991 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); | |
ba17674f | 992 | if (IS_ERR(olddirfid)) { |
da977b2c | 993 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 994 | goto done; |
da977b2c EVH |
995 | } |
996 | ||
997 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); | |
ba17674f | 998 | if (IS_ERR(newdirfid)) { |
da977b2c | 999 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 1000 | goto clunk_olddir; |
2bad8471 EVH |
1001 | } |
1002 | ||
a534c8d1 | 1003 | down_write(&v9ses->rename_sem); |
4681dbda | 1004 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
1005 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
1006 | newdirfid, new_dentry->d_name.name); | |
1007 | if (retval == -EOPNOTSUPP) | |
1008 | retval = p9_client_rename(oldfid, newdirfid, | |
1009 | new_dentry->d_name.name); | |
1010 | if (retval != -EOPNOTSUPP) | |
4681dbda SK |
1011 | goto clunk_newdir; |
1012 | } | |
a534c8d1 AK |
1013 | if (old_dentry->d_parent != new_dentry->d_parent) { |
1014 | /* | |
1015 | * 9P .u can only handle file rename in the same directory | |
1016 | */ | |
4681dbda | 1017 | |
5d385153 | 1018 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 1019 | retval = -EXDEV; |
bd238fb4 | 1020 | goto clunk_newdir; |
2bad8471 | 1021 | } |
531b1094 | 1022 | v9fs_blank_wstat(&wstat); |
ba17674f | 1023 | wstat.muid = v9ses->uname; |
531b1094 | 1024 | wstat.name = (char *) new_dentry->d_name.name; |
bd238fb4 | 1025 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 1026 | |
bd238fb4 | 1027 | clunk_newdir: |
b271ec47 AK |
1028 | if (!retval) { |
1029 | if (new_inode) { | |
1030 | if (S_ISDIR(new_inode->i_mode)) | |
1031 | clear_nlink(new_inode); | |
1032 | else | |
1033 | drop_nlink(new_inode); | |
1034 | } | |
1035 | if (S_ISDIR(old_inode->i_mode)) { | |
1036 | if (!new_inode) | |
1037 | inc_nlink(new_dir); | |
1038 | drop_nlink(old_dir); | |
1039 | } | |
3bc86de3 | 1040 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
1041 | v9fs_invalidate_inode_attr(old_dir); |
1042 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 1043 | |
a534c8d1 AK |
1044 | /* successful rename */ |
1045 | d_move(old_dentry, new_dentry); | |
b271ec47 | 1046 | } |
a534c8d1 | 1047 | up_write(&v9ses->rename_sem); |
22150c4f | 1048 | p9_client_clunk(newdirfid); |
2bad8471 | 1049 | |
bd238fb4 | 1050 | clunk_olddir: |
22150c4f | 1051 | p9_client_clunk(olddirfid); |
da977b2c | 1052 | |
bd238fb4 | 1053 | done: |
2bad8471 EVH |
1054 | return retval; |
1055 | } | |
1056 | ||
1057 | /** | |
943ffb58 | 1058 | * v9fs_vfs_getattr - retrieve file metadata |
ee443996 EVH |
1059 | * @mnt: mount information |
1060 | * @dentry: file to get attributes on | |
1061 | * @stat: metadata structure to populate | |
2bad8471 EVH |
1062 | * |
1063 | */ | |
1064 | ||
1065 | static int | |
1066 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1067 | struct kstat *stat) | |
1068 | { | |
bd238fb4 LI |
1069 | int err; |
1070 | struct v9fs_session_info *v9ses; | |
1071 | struct p9_fid *fid; | |
51a87c55 | 1072 | struct p9_wstat *st; |
bd238fb4 | 1073 | |
5d385153 | 1074 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
bd238fb4 | 1075 | err = -EPERM; |
42869c8a | 1076 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 AK |
1077 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
1078 | generic_fillattr(dentry->d_inode, stat); | |
1079 | return 0; | |
1080 | } | |
bd238fb4 LI |
1081 | fid = v9fs_fid_lookup(dentry); |
1082 | if (IS_ERR(fid)) | |
da977b2c | 1083 | return PTR_ERR(fid); |
2bad8471 | 1084 | |
bd238fb4 LI |
1085 | st = p9_client_stat(fid); |
1086 | if (IS_ERR(st)) | |
1087 | return PTR_ERR(st); | |
2bad8471 | 1088 | |
bd238fb4 | 1089 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
45089142 | 1090 | generic_fillattr(dentry->d_inode, stat); |
2bad8471 | 1091 | |
62b2be59 | 1092 | p9stat_free(st); |
bd238fb4 LI |
1093 | kfree(st); |
1094 | return 0; | |
2bad8471 EVH |
1095 | } |
1096 | ||
1097 | /** | |
1098 | * v9fs_vfs_setattr - set file metadata | |
1099 | * @dentry: file whose metadata to set | |
1100 | * @iattr: metadata assignment structure | |
1101 | * | |
1102 | */ | |
1103 | ||
1104 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
1105 | { | |
bd238fb4 LI |
1106 | int retval; |
1107 | struct v9fs_session_info *v9ses; | |
1108 | struct p9_fid *fid; | |
1109 | struct p9_wstat wstat; | |
2bad8471 | 1110 | |
5d385153 | 1111 | p9_debug(P9_DEBUG_VFS, "\n"); |
059c138b AK |
1112 | retval = inode_change_ok(dentry->d_inode, iattr); |
1113 | if (retval) | |
1114 | return retval; | |
1115 | ||
bd238fb4 | 1116 | retval = -EPERM; |
42869c8a | 1117 | v9ses = v9fs_dentry2v9ses(dentry); |
bd238fb4 | 1118 | fid = v9fs_fid_lookup(dentry); |
da977b2c EVH |
1119 | if(IS_ERR(fid)) |
1120 | return PTR_ERR(fid); | |
2bad8471 | 1121 | |
531b1094 | 1122 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1123 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1124 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1125 | |
1126 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1127 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1128 | |
1129 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1130 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1131 | |
1132 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1133 | wstat.length = iattr->ia_size; |
2bad8471 | 1134 | |
dd6102fb | 1135 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1136 | if (iattr->ia_valid & ATTR_UID) |
1137 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1138 | |
531b1094 LI |
1139 | if (iattr->ia_valid & ATTR_GID) |
1140 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1141 | } |
059c138b | 1142 | |
3dc5436a AK |
1143 | /* Write all dirty data */ |
1144 | if (S_ISREG(dentry->d_inode->i_mode)) | |
1145 | filemap_write_and_wait(dentry->d_inode->i_mapping); | |
1146 | ||
f10fc50f AK |
1147 | retval = p9_client_wstat(fid, &wstat); |
1148 | if (retval < 0) | |
1149 | return retval; | |
059c138b AK |
1150 | |
1151 | if ((iattr->ia_valid & ATTR_SIZE) && | |
1152 | iattr->ia_size != i_size_read(dentry->d_inode)) | |
1153 | truncate_setsize(dentry->d_inode, iattr->ia_size); | |
1154 | ||
f10fc50f | 1155 | v9fs_invalidate_inode_attr(dentry->d_inode); |
2bad8471 | 1156 | |
1025774c CH |
1157 | setattr_copy(dentry->d_inode, iattr); |
1158 | mark_inode_dirty(dentry->d_inode); | |
1159 | return 0; | |
2bad8471 EVH |
1160 | } |
1161 | ||
1162 | /** | |
531b1094 LI |
1163 | * v9fs_stat2inode - populate an inode structure with mistat info |
1164 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1165 | * @inode: inode to populate |
1166 | * @sb: superblock of filesystem | |
1167 | * | |
1168 | */ | |
1169 | ||
1170 | void | |
51a87c55 | 1171 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
531b1094 | 1172 | struct super_block *sb) |
2bad8471 | 1173 | { |
3eda0de6 | 1174 | umode_t mode; |
531b1094 | 1175 | char ext[32]; |
5717144a AK |
1176 | char tag_name[14]; |
1177 | unsigned int i_nlink; | |
2bad8471 | 1178 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1179 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1180 | |
bfe86848 | 1181 | set_nlink(inode, 1); |
2bad8471 | 1182 | |
531b1094 LI |
1183 | inode->i_atime.tv_sec = stat->atime; |
1184 | inode->i_mtime.tv_sec = stat->mtime; | |
1185 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1186 | |
bd32b82d LI |
1187 | inode->i_uid = v9ses->dfltuid; |
1188 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1189 | |
dd6102fb | 1190 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1191 | inode->i_uid = stat->n_uid; |
1192 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1193 | } |
5717144a AK |
1194 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
1195 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { | |
1196 | /* | |
1197 | * Hadlink support got added later to | |
1198 | * to the .u extension. So there can be | |
1199 | * server out there that doesn't support | |
1200 | * this even with .u extension. So check | |
1201 | * for non NULL stat->extension | |
1202 | */ | |
1203 | strncpy(ext, stat->extension, sizeof(ext)); | |
1204 | /* HARDLINKCOUNT %u */ | |
1205 | sscanf(ext, "%13s %u", tag_name, &i_nlink); | |
1206 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) | |
bfe86848 | 1207 | set_nlink(inode, i_nlink); |
5717144a AK |
1208 | } |
1209 | } | |
df345c67 | 1210 | mode = p9mode2perm(v9ses, stat); |
45089142 AK |
1211 | mode |= inode->i_mode & ~S_IALLUGO; |
1212 | inode->i_mode = mode; | |
7549ae3e | 1213 | i_size_write(inode, stat->length); |
2bad8471 | 1214 | |
bd238fb4 | 1215 | /* not real number of blocks, but 512 byte ones ... */ |
7549ae3e | 1216 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
b3cbea03 | 1217 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1218 | } |
1219 | ||
1220 | /** | |
1221 | * v9fs_qid2ino - convert qid into inode number | |
1222 | * @qid: qid to hash | |
1223 | * | |
1224 | * BUG: potential for inode number collisions? | |
1225 | */ | |
1226 | ||
bd238fb4 | 1227 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1228 | { |
1229 | u64 path = qid->path + 2; | |
1230 | ino_t i = 0; | |
1231 | ||
1232 | if (sizeof(ino_t) == sizeof(path)) | |
1233 | memcpy(&i, &path, sizeof(ino_t)); | |
1234 | else | |
1235 | i = (ino_t) (path ^ (path >> 32)); | |
1236 | ||
1237 | return i; | |
1238 | } | |
1239 | ||
2bad8471 EVH |
1240 | /** |
1241 | * v9fs_readlink - read a symlink's location (internal version) | |
1242 | * @dentry: dentry for symlink | |
73c592b9 | 1243 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
1244 | * @buflen: length of buffer |
1245 | * | |
1246 | */ | |
1247 | ||
1248 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
1249 | { | |
bd238fb4 | 1250 | int retval; |
2bad8471 | 1251 | |
bd238fb4 LI |
1252 | struct v9fs_session_info *v9ses; |
1253 | struct p9_fid *fid; | |
51a87c55 | 1254 | struct p9_wstat *st; |
2bad8471 | 1255 | |
5d385153 | 1256 | p9_debug(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
bd238fb4 | 1257 | retval = -EPERM; |
42869c8a | 1258 | v9ses = v9fs_dentry2v9ses(dentry); |
bd238fb4 | 1259 | fid = v9fs_fid_lookup(dentry); |
ba17674f | 1260 | if (IS_ERR(fid)) |
da977b2c | 1261 | return PTR_ERR(fid); |
2bad8471 | 1262 | |
329176cc | 1263 | if (!v9fs_proto_dotu(v9ses)) |
bd238fb4 | 1264 | return -EBADF; |
2bad8471 | 1265 | |
bd238fb4 LI |
1266 | st = p9_client_stat(fid); |
1267 | if (IS_ERR(st)) | |
1268 | return PTR_ERR(st); | |
2bad8471 | 1269 | |
bd238fb4 | 1270 | if (!(st->mode & P9_DMSYMLINK)) { |
2bad8471 | 1271 | retval = -EINVAL; |
bd238fb4 | 1272 | goto done; |
2bad8471 EVH |
1273 | } |
1274 | ||
1275 | /* copy extension buffer into buffer */ | |
ba413ab2 JM |
1276 | retval = min(strlen(st->extension)+1, (size_t)buflen); |
1277 | memcpy(buffer, st->extension, retval); | |
2bad8471 | 1278 | |
ba413ab2 JM |
1279 | p9_debug(P9_DEBUG_VFS, "%s -> %s (%.*s)\n", |
1280 | dentry->d_name.name, st->extension, buflen, buffer); | |
2bad8471 | 1281 | |
bd238fb4 | 1282 | done: |
62b2be59 | 1283 | p9stat_free(st); |
bd238fb4 | 1284 | kfree(st); |
2bad8471 EVH |
1285 | return retval; |
1286 | } | |
1287 | ||
2bad8471 EVH |
1288 | /** |
1289 | * v9fs_vfs_follow_link - follow a symlink path | |
1290 | * @dentry: dentry for symlink | |
1291 | * @nd: nameidata | |
1292 | * | |
1293 | */ | |
1294 | ||
1295 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1296 | { | |
1297 | int len = 0; | |
1298 | char *link = __getname(); | |
1299 | ||
5d385153 | 1300 | p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); |
2bad8471 EVH |
1301 | |
1302 | if (!link) | |
1303 | link = ERR_PTR(-ENOMEM); | |
1304 | else { | |
16cce6d2 | 1305 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
1306 | |
1307 | if (len < 0) { | |
ce44eeb6 | 1308 | __putname(link); |
2bad8471 EVH |
1309 | link = ERR_PTR(len); |
1310 | } else | |
2511cd0b | 1311 | link[min(len, PATH_MAX-1)] = 0; |
2bad8471 EVH |
1312 | } |
1313 | nd_set_link(nd, link); | |
1314 | ||
1315 | return NULL; | |
1316 | } | |
1317 | ||
1318 | /** | |
1319 | * v9fs_vfs_put_link - release a symlink path | |
1320 | * @dentry: dentry for symlink | |
1321 | * @nd: nameidata | |
ee443996 | 1322 | * @p: unused |
2bad8471 EVH |
1323 | * |
1324 | */ | |
1325 | ||
53c06f4e | 1326 | void |
ee443996 | 1327 | v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
2bad8471 EVH |
1328 | { |
1329 | char *s = nd_get_link(nd); | |
1330 | ||
5d385153 JP |
1331 | p9_debug(P9_DEBUG_VFS, " %s %s\n", |
1332 | dentry->d_name.name, IS_ERR(s) ? "<error>" : s); | |
2bad8471 | 1333 | if (!IS_ERR(s)) |
ce44eeb6 | 1334 | __putname(s); |
2bad8471 EVH |
1335 | } |
1336 | ||
ee443996 EVH |
1337 | /** |
1338 | * v9fs_vfs_mkspecial - create a special file | |
1339 | * @dir: inode to create special file in | |
1340 | * @dentry: dentry to create | |
1341 | * @mode: mode to create special file | |
1342 | * @extension: 9p2000.u format extension string representing special file | |
1343 | * | |
1344 | */ | |
1345 | ||
531b1094 | 1346 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
c2837de7 | 1347 | u32 perm, const char *extension) |
2bad8471 | 1348 | { |
bd238fb4 | 1349 | struct p9_fid *fid; |
d28c61f0 | 1350 | struct v9fs_session_info *v9ses; |
2bad8471 | 1351 | |
6a3124a3 | 1352 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1353 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1354 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1355 | return -EPERM; |
2bad8471 EVH |
1356 | } |
1357 | ||
bd238fb4 LI |
1358 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1359 | P9_OREAD); | |
1360 | if (IS_ERR(fid)) | |
1361 | return PTR_ERR(fid); | |
da977b2c | 1362 | |
d28c61f0 | 1363 | v9fs_invalidate_inode_attr(dir); |
bd238fb4 | 1364 | p9_client_clunk(fid); |
6a3124a3 | 1365 | return 0; |
531b1094 LI |
1366 | } |
1367 | ||
1368 | /** | |
1369 | * v9fs_vfs_symlink - helper function to create symlinks | |
1370 | * @dir: directory inode containing symlink | |
1371 | * @dentry: dentry for symlink | |
1372 | * @symname: symlink data | |
1373 | * | |
ee443996 | 1374 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1375 | * |
1376 | */ | |
1377 | ||
1378 | static int | |
1379 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1380 | { | |
5d385153 JP |
1381 | p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", |
1382 | dir->i_ino, dentry->d_name.name, symname); | |
531b1094 | 1383 | |
c2837de7 | 1384 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
531b1094 LI |
1385 | } |
1386 | ||
1387 | /** | |
1388 | * v9fs_vfs_link - create a hardlink | |
1389 | * @old_dentry: dentry for file to link to | |
1390 | * @dir: inode destination for new link | |
1391 | * @dentry: dentry for link | |
1392 | * | |
1393 | */ | |
1394 | ||
531b1094 LI |
1395 | static int |
1396 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1397 | struct dentry *dentry) | |
1398 | { | |
1399 | int retval; | |
531b1094 | 1400 | char *name; |
d28c61f0 | 1401 | struct p9_fid *oldfid; |
531b1094 | 1402 | |
5d385153 JP |
1403 | p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", |
1404 | dir->i_ino, dentry->d_name.name, old_dentry->d_name.name); | |
531b1094 | 1405 | |
da977b2c | 1406 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1407 | if (IS_ERR(oldfid)) |
da977b2c | 1408 | return PTR_ERR(oldfid); |
531b1094 LI |
1409 | |
1410 | name = __getname(); | |
da977b2c EVH |
1411 | if (unlikely(!name)) { |
1412 | retval = -ENOMEM; | |
1413 | goto clunk_fid; | |
1414 | } | |
0710d36a | 1415 | |
16cce6d2 | 1416 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1417 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
531b1094 | 1418 | __putname(name); |
c06c066a AK |
1419 | if (!retval) { |
1420 | v9fs_refresh_inode(oldfid, old_dentry->d_inode); | |
d28c61f0 | 1421 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1422 | } |
da977b2c | 1423 | clunk_fid: |
bd238fb4 | 1424 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1425 | return retval; |
1426 | } | |
1427 | ||
1428 | /** | |
1429 | * v9fs_vfs_mknod - create a special file | |
1430 | * @dir: inode destination for new link | |
1431 | * @dentry: dentry for file | |
1432 | * @mode: mode for creation | |
ee443996 | 1433 | * @rdev: device associated with special file |
2bad8471 EVH |
1434 | * |
1435 | */ | |
1436 | ||
1437 | static int | |
1a67aafb | 1438 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) |
2bad8471 | 1439 | { |
c2837de7 | 1440 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
531b1094 LI |
1441 | int retval; |
1442 | char *name; | |
c2837de7 | 1443 | u32 perm; |
2bad8471 | 1444 | |
609eac1c | 1445 | p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n", |
5d385153 JP |
1446 | dir->i_ino, dentry->d_name.name, mode, |
1447 | MAJOR(rdev), MINOR(rdev)); | |
2bad8471 | 1448 | |
531b1094 LI |
1449 | if (!new_valid_dev(rdev)) |
1450 | return -EINVAL; | |
2bad8471 | 1451 | |
531b1094 | 1452 | name = __getname(); |
c0291a05 ET |
1453 | if (!name) |
1454 | return -ENOMEM; | |
2bad8471 EVH |
1455 | /* build extension */ |
1456 | if (S_ISBLK(mode)) | |
531b1094 | 1457 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1458 | else if (S_ISCHR(mode)) |
531b1094 | 1459 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1460 | else if (S_ISFIFO(mode)) |
531b1094 | 1461 | *name = 0; |
75cc5c9b VJ |
1462 | else if (S_ISSOCK(mode)) |
1463 | *name = 0; | |
2bad8471 | 1464 | else { |
531b1094 LI |
1465 | __putname(name); |
1466 | return -EINVAL; | |
2bad8471 EVH |
1467 | } |
1468 | ||
c2837de7 AV |
1469 | perm = unixmode2p9mode(v9ses, mode); |
1470 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); | |
531b1094 | 1471 | __putname(name); |
2bad8471 EVH |
1472 | |
1473 | return retval; | |
1474 | } | |
1475 | ||
b3cbea03 AK |
1476 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1477 | { | |
45089142 AK |
1478 | int umode; |
1479 | dev_t rdev; | |
b3cbea03 AK |
1480 | loff_t i_size; |
1481 | struct p9_wstat *st; | |
1482 | struct v9fs_session_info *v9ses; | |
1483 | ||
1484 | v9ses = v9fs_inode2v9ses(inode); | |
1485 | st = p9_client_stat(fid); | |
1486 | if (IS_ERR(st)) | |
1487 | return PTR_ERR(st); | |
45089142 AK |
1488 | /* |
1489 | * Don't update inode if the file type is different | |
1490 | */ | |
1491 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
1492 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) | |
1493 | goto out; | |
b3cbea03 AK |
1494 | |
1495 | spin_lock(&inode->i_lock); | |
1496 | /* | |
1497 | * We don't want to refresh inode->i_size, | |
1498 | * because we may have cached data | |
1499 | */ | |
1500 | i_size = inode->i_size; | |
1501 | v9fs_stat2inode(st, inode, inode->i_sb); | |
1502 | if (v9ses->cache) | |
1503 | inode->i_size = i_size; | |
1504 | spin_unlock(&inode->i_lock); | |
45089142 | 1505 | out: |
b3cbea03 AK |
1506 | p9stat_free(st); |
1507 | kfree(st); | |
1508 | return 0; | |
1509 | } | |
1510 | ||
9b6533c9 SK |
1511 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1512 | .create = v9fs_vfs_create, | |
1513 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1514 | .atomic_open = v9fs_vfs_atomic_open, |
9b6533c9 | 1515 | .symlink = v9fs_vfs_symlink, |
50cc42ff | 1516 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1517 | .unlink = v9fs_vfs_unlink, |
1518 | .mkdir = v9fs_vfs_mkdir, | |
1519 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1520 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1521 | .rename = v9fs_vfs_rename, |
1522 | .getattr = v9fs_vfs_getattr, | |
1523 | .setattr = v9fs_vfs_setattr, | |
1524 | }; | |
1525 | ||
754661f1 | 1526 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1527 | .create = v9fs_vfs_create, |
1528 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1529 | .atomic_open = v9fs_vfs_atomic_open, |
b501611a EVH |
1530 | .unlink = v9fs_vfs_unlink, |
1531 | .mkdir = v9fs_vfs_mkdir, | |
1532 | .rmdir = v9fs_vfs_rmdir, | |
1533 | .mknod = v9fs_vfs_mknod, | |
1534 | .rename = v9fs_vfs_rename, | |
1535 | .getattr = v9fs_vfs_getattr, | |
1536 | .setattr = v9fs_vfs_setattr, | |
1537 | }; | |
1538 | ||
754661f1 | 1539 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1540 | .getattr = v9fs_vfs_getattr, |
1541 | .setattr = v9fs_vfs_setattr, | |
1542 | }; | |
1543 | ||
754661f1 | 1544 | static const struct inode_operations v9fs_symlink_inode_operations = { |
204f2f0e | 1545 | .readlink = generic_readlink, |
2bad8471 EVH |
1546 | .follow_link = v9fs_vfs_follow_link, |
1547 | .put_link = v9fs_vfs_put_link, | |
1548 | .getattr = v9fs_vfs_getattr, | |
1549 | .setattr = v9fs_vfs_setattr, | |
1550 | }; | |
9b6533c9 | 1551 |