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Commit | Line | Data |
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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 | ||
73c592b9 | 64 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int 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 | 71 | if (S_ISLNK(mode)) |
bd238fb4 | 72 | res |= P9_DMSYMLINK; |
2bad8471 EVH |
73 | if (v9ses->nodev == 0) { |
74 | if (S_ISSOCK(mode)) | |
bd238fb4 | 75 | res |= P9_DMSOCKET; |
2bad8471 | 76 | if (S_ISFIFO(mode)) |
bd238fb4 | 77 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 78 | if (S_ISBLK(mode)) |
bd238fb4 | 79 | res |= P9_DMDEVICE; |
2bad8471 | 80 | if (S_ISCHR(mode)) |
bd238fb4 | 81 | res |= P9_DMDEVICE; |
2bad8471 EVH |
82 | } |
83 | ||
84 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 85 | res |= P9_DMSETUID; |
2bad8471 | 86 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 87 | res |= P9_DMSETGID; |
d199d652 AL |
88 | if ((mode & S_ISVTX) == S_ISVTX) |
89 | res |= P9_DMSETVTX; | |
bd238fb4 LI |
90 | if ((mode & P9_DMLINK)) |
91 | res |= P9_DMLINK; | |
2bad8471 EVH |
92 | } |
93 | ||
94 | return res; | |
95 | } | |
96 | ||
97 | /** | |
98 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
99 | * @v9ses: v9fs session information | |
45089142 AK |
100 | * @stat: p9_wstat from which mode need to be derived |
101 | * @rdev: major number, minor number in case of device files. | |
2bad8471 EVH |
102 | * |
103 | */ | |
45089142 AK |
104 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, |
105 | struct p9_wstat *stat, dev_t *rdev) | |
2bad8471 EVH |
106 | { |
107 | int res; | |
45089142 | 108 | int mode = stat->mode; |
2bad8471 | 109 | |
45089142 AK |
110 | res = mode & S_IALLUGO; |
111 | *rdev = 0; | |
2bad8471 | 112 | |
bd238fb4 | 113 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 114 | res |= S_IFDIR; |
dd6102fb | 115 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 116 | res |= S_IFLNK; |
dd6102fb | 117 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
118 | && (v9ses->nodev == 0)) |
119 | res |= S_IFSOCK; | |
dd6102fb | 120 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
121 | && (v9ses->nodev == 0)) |
122 | res |= S_IFIFO; | |
dd6102fb | 123 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
45089142 AK |
124 | && (v9ses->nodev == 0)) { |
125 | char type = 0, ext[32]; | |
126 | int major = -1, minor = -1; | |
127 | ||
128 | strncpy(ext, stat->extension, sizeof(ext)); | |
129 | sscanf(ext, "%c %u %u", &type, &major, &minor); | |
130 | switch (type) { | |
131 | case 'c': | |
132 | res |= S_IFCHR; | |
133 | break; | |
134 | case 'b': | |
135 | res |= S_IFBLK; | |
136 | break; | |
137 | default: | |
5d385153 JP |
138 | p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", |
139 | type, stat->extension); | |
45089142 AK |
140 | }; |
141 | *rdev = MKDEV(major, minor); | |
142 | } else | |
2bad8471 EVH |
143 | res |= S_IFREG; |
144 | ||
dd6102fb | 145 | if (v9fs_proto_dotu(v9ses)) { |
bd238fb4 | 146 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
2bad8471 EVH |
147 | res |= S_ISUID; |
148 | ||
bd238fb4 | 149 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
2bad8471 | 150 | res |= S_ISGID; |
d199d652 AL |
151 | |
152 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
153 | res |= S_ISVTX; | |
2bad8471 | 154 | } |
2bad8471 EVH |
155 | return res; |
156 | } | |
157 | ||
ee443996 EVH |
158 | /** |
159 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
160 | * @uflags: flags to convert | |
2e4bef41 | 161 | * @extended: if .u extensions are active |
ee443996 EVH |
162 | */ |
163 | ||
2e4bef41 | 164 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
165 | { |
166 | int ret; | |
167 | ||
168 | ret = 0; | |
169 | switch (uflags&3) { | |
170 | default: | |
171 | case O_RDONLY: | |
bd238fb4 | 172 | ret = P9_OREAD; |
6a3124a3 LI |
173 | break; |
174 | ||
175 | case O_WRONLY: | |
bd238fb4 | 176 | ret = P9_OWRITE; |
6a3124a3 LI |
177 | break; |
178 | ||
179 | case O_RDWR: | |
bd238fb4 | 180 | ret = P9_ORDWR; |
6a3124a3 LI |
181 | break; |
182 | } | |
183 | ||
6a3124a3 | 184 | if (uflags & O_TRUNC) |
bd238fb4 | 185 | ret |= P9_OTRUNC; |
6a3124a3 | 186 | |
2e4bef41 EVH |
187 | if (extended) { |
188 | if (uflags & O_EXCL) | |
189 | ret |= P9_OEXCL; | |
190 | ||
191 | if (uflags & O_APPEND) | |
192 | ret |= P9_OAPPEND; | |
193 | } | |
6a3124a3 LI |
194 | |
195 | return ret; | |
196 | } | |
197 | ||
2bad8471 | 198 | /** |
531b1094 | 199 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 200 | * @wstat: structure to initialize |
2bad8471 EVH |
201 | * |
202 | */ | |
203 | ||
7a4439c4 | 204 | void |
bd238fb4 | 205 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 206 | { |
531b1094 LI |
207 | wstat->type = ~0; |
208 | wstat->dev = ~0; | |
209 | wstat->qid.type = ~0; | |
210 | wstat->qid.version = ~0; | |
211 | *((long long *)&wstat->qid.path) = ~0; | |
212 | wstat->mode = ~0; | |
213 | wstat->atime = ~0; | |
214 | wstat->mtime = ~0; | |
215 | wstat->length = ~0; | |
216 | wstat->name = NULL; | |
217 | wstat->uid = NULL; | |
218 | wstat->gid = NULL; | |
219 | wstat->muid = NULL; | |
220 | wstat->n_uid = ~0; | |
221 | wstat->n_gid = ~0; | |
222 | wstat->n_muid = ~0; | |
223 | wstat->extension = NULL; | |
2bad8471 EVH |
224 | } |
225 | ||
60e78d2c AK |
226 | /** |
227 | * v9fs_alloc_inode - helper function to allocate an inode | |
60e78d2c AK |
228 | * |
229 | */ | |
60e78d2c AK |
230 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
231 | { | |
a78ce05d AK |
232 | struct v9fs_inode *v9inode; |
233 | v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, | |
234 | GFP_KERNEL); | |
235 | if (!v9inode) | |
60e78d2c | 236 | return NULL; |
a78ce05d AK |
237 | #ifdef CONFIG_9P_FSCACHE |
238 | v9inode->fscache = NULL; | |
a78ce05d AK |
239 | spin_lock_init(&v9inode->fscache_lock); |
240 | #endif | |
6b39f6d2 | 241 | v9inode->writeback_fid = NULL; |
b3cbea03 | 242 | v9inode->cache_validity = 0; |
5a7e0a8c | 243 | mutex_init(&v9inode->v_mutex); |
a78ce05d | 244 | return &v9inode->vfs_inode; |
60e78d2c AK |
245 | } |
246 | ||
247 | /** | |
248 | * v9fs_destroy_inode - destroy an inode | |
249 | * | |
250 | */ | |
251 | ||
fa0d7e3d | 252 | static void v9fs_i_callback(struct rcu_head *head) |
60e78d2c | 253 | { |
fa0d7e3d NP |
254 | struct inode *inode = container_of(head, struct inode, i_rcu); |
255 | INIT_LIST_HEAD(&inode->i_dentry); | |
a78ce05d | 256 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 257 | } |
fa0d7e3d NP |
258 | |
259 | void v9fs_destroy_inode(struct inode *inode) | |
260 | { | |
261 | call_rcu(&inode->i_rcu, v9fs_i_callback); | |
262 | } | |
60e78d2c | 263 | |
5ffc0cb3 | 264 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
45089142 | 265 | struct inode *inode, int mode, dev_t rdev) |
2bad8471 | 266 | { |
5ffc0cb3 | 267 | int err = 0; |
2bb54115 | 268 | |
217f206d | 269 | inode_init_owner(inode, NULL, mode); |
2bb54115 | 270 | inode->i_blocks = 0; |
45089142 | 271 | inode->i_rdev = rdev; |
2bb54115 AK |
272 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
273 | inode->i_mapping->a_ops = &v9fs_addr_operations; | |
274 | ||
275 | switch (mode & S_IFMT) { | |
276 | case S_IFIFO: | |
277 | case S_IFBLK: | |
278 | case S_IFCHR: | |
279 | case S_IFSOCK: | |
4b43516a MK |
280 | if (v9fs_proto_dotl(v9ses)) { |
281 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
4b43516a MK |
282 | } else if (v9fs_proto_dotu(v9ses)) { |
283 | inode->i_op = &v9fs_file_inode_operations; | |
4b43516a | 284 | } else { |
5d385153 JP |
285 | p9_debug(P9_DEBUG_ERROR, |
286 | "special files without extended mode\n"); | |
2bb54115 AK |
287 | err = -EINVAL; |
288 | goto error; | |
2bad8471 | 289 | } |
2bb54115 AK |
290 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
291 | break; | |
292 | case S_IFREG: | |
9b6533c9 SK |
293 | if (v9fs_proto_dotl(v9ses)) { |
294 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
29236f4e AK |
295 | if (v9ses->cache) |
296 | inode->i_fop = | |
297 | &v9fs_cached_file_operations_dotl; | |
298 | else | |
299 | inode->i_fop = &v9fs_file_operations_dotl; | |
9b6533c9 SK |
300 | } else { |
301 | inode->i_op = &v9fs_file_inode_operations; | |
29236f4e AK |
302 | if (v9ses->cache) |
303 | inode->i_fop = &v9fs_cached_file_operations; | |
304 | else | |
305 | inode->i_fop = &v9fs_file_operations; | |
9b6533c9 SK |
306 | } |
307 | ||
2bb54115 AK |
308 | break; |
309 | case S_IFLNK: | |
9b6533c9 | 310 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
5d385153 JP |
311 | p9_debug(P9_DEBUG_ERROR, |
312 | "extended modes used with legacy protocol\n"); | |
2bb54115 AK |
313 | err = -EINVAL; |
314 | goto error; | |
315 | } | |
9b6533c9 SK |
316 | |
317 | if (v9fs_proto_dotl(v9ses)) | |
318 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
319 | else | |
320 | inode->i_op = &v9fs_symlink_inode_operations; | |
321 | ||
2bb54115 AK |
322 | break; |
323 | case S_IFDIR: | |
324 | inc_nlink(inode); | |
9b6533c9 SK |
325 | if (v9fs_proto_dotl(v9ses)) |
326 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
327 | else if (v9fs_proto_dotu(v9ses)) | |
328 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
329 | else |
330 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
331 | |
332 | if (v9fs_proto_dotl(v9ses)) | |
333 | inode->i_fop = &v9fs_dir_operations_dotl; | |
334 | else | |
335 | inode->i_fop = &v9fs_dir_operations; | |
336 | ||
2bb54115 AK |
337 | break; |
338 | default: | |
5d385153 JP |
339 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", |
340 | mode, mode & S_IFMT); | |
2bb54115 AK |
341 | err = -EINVAL; |
342 | goto error; | |
2bad8471 | 343 | } |
5ffc0cb3 AK |
344 | error: |
345 | return err; | |
2bb54115 | 346 | |
5ffc0cb3 | 347 | } |
2bb54115 | 348 | |
5ffc0cb3 AK |
349 | /** |
350 | * v9fs_get_inode - helper function to setup an inode | |
351 | * @sb: superblock | |
352 | * @mode: mode to setup inode with | |
353 | * | |
354 | */ | |
355 | ||
45089142 | 356 | struct inode *v9fs_get_inode(struct super_block *sb, int mode, dev_t rdev) |
5ffc0cb3 AK |
357 | { |
358 | int err; | |
359 | struct inode *inode; | |
360 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
361 | ||
5d385153 | 362 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
5ffc0cb3 AK |
363 | |
364 | inode = new_inode(sb); | |
365 | if (!inode) { | |
5d385153 JP |
366 | pr_warn("%s (%d): Problem allocating inode\n", |
367 | __func__, task_pid_nr(current)); | |
5ffc0cb3 AK |
368 | return ERR_PTR(-ENOMEM); |
369 | } | |
45089142 | 370 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
5ffc0cb3 AK |
371 | if (err) { |
372 | iput(inode); | |
373 | return ERR_PTR(err); | |
374 | } | |
375 | return inode; | |
2bad8471 EVH |
376 | } |
377 | ||
bd238fb4 | 378 | /* |
6a3124a3 LI |
379 | static struct v9fs_fid* |
380 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
381 | { | |
382 | int err; | |
736c4b85 | 383 | int nfid; |
6a3124a3 LI |
384 | struct v9fs_fid *ret; |
385 | struct v9fs_fcall *fcall; | |
386 | ||
387 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
388 | if (nfid < 0) { | |
0b8dd177 | 389 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 390 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
391 | } |
392 | ||
6a3124a3 LI |
393 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
394 | &fcall); | |
395 | ||
396 | if (err < 0) { | |
41e5a6ac LI |
397 | if (fcall && fcall->id == RWALK) |
398 | goto clunk_fid; | |
399 | ||
6a3124a3 LI |
400 | PRINT_FCALL_ERROR("walk error", fcall); |
401 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
402 | goto error; | |
0b8dd177 | 403 | } |
6a3124a3 | 404 | |
3cf6429a LI |
405 | kfree(fcall); |
406 | fcall = NULL; | |
6a3124a3 LI |
407 | ret = v9fs_fid_create(v9ses, nfid); |
408 | if (!ret) { | |
409 | err = -ENOMEM; | |
410 | goto clunk_fid; | |
411 | } | |
0b8dd177 | 412 | |
6a3124a3 LI |
413 | err = v9fs_fid_insert(ret, dentry); |
414 | if (err < 0) { | |
415 | v9fs_fid_destroy(ret); | |
416 | goto clunk_fid; | |
0b8dd177 | 417 | } |
2bad8471 | 418 | |
6a3124a3 | 419 | return ret; |
2bad8471 | 420 | |
6a3124a3 LI |
421 | clunk_fid: |
422 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 423 | |
6a3124a3 LI |
424 | error: |
425 | kfree(fcall); | |
426 | return ERR_PTR(err); | |
427 | } | |
bd238fb4 | 428 | */ |
2bad8471 | 429 | |
60e78d2c AK |
430 | |
431 | /** | |
432 | * v9fs_clear_inode - release an inode | |
433 | * @inode: inode to release | |
434 | * | |
435 | */ | |
b57922d9 | 436 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 437 | { |
6b39f6d2 AK |
438 | struct v9fs_inode *v9inode = V9FS_I(inode); |
439 | ||
b57922d9 AV |
440 | truncate_inode_pages(inode->i_mapping, 0); |
441 | end_writeback(inode); | |
60e78d2c AK |
442 | filemap_fdatawrite(inode->i_mapping); |
443 | ||
444 | #ifdef CONFIG_9P_FSCACHE | |
445 | v9fs_cache_inode_put_cookie(inode); | |
446 | #endif | |
6b39f6d2 AK |
447 | /* clunk the fid stashed in writeback_fid */ |
448 | if (v9inode->writeback_fid) { | |
449 | p9_client_clunk(v9inode->writeback_fid); | |
450 | v9inode->writeback_fid = NULL; | |
3cf387d7 | 451 | } |
60e78d2c AK |
452 | } |
453 | ||
fd2421f5 AK |
454 | static int v9fs_test_inode(struct inode *inode, void *data) |
455 | { | |
456 | int umode; | |
45089142 | 457 | dev_t rdev; |
fd2421f5 AK |
458 | struct v9fs_inode *v9inode = V9FS_I(inode); |
459 | struct p9_wstat *st = (struct p9_wstat *)data; | |
460 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); | |
461 | ||
45089142 | 462 | umode = p9mode2unixmode(v9ses, st, &rdev); |
fd2421f5 AK |
463 | /* don't match inode of different type */ |
464 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) | |
465 | return 0; | |
466 | ||
467 | /* compare qid details */ | |
468 | if (memcmp(&v9inode->qid.version, | |
469 | &st->qid.version, sizeof(v9inode->qid.version))) | |
470 | return 0; | |
471 | ||
472 | if (v9inode->qid.type != st->qid.type) | |
473 | return 0; | |
474 | return 1; | |
475 | } | |
476 | ||
ed80fcfa AK |
477 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
478 | { | |
479 | return 0; | |
480 | } | |
481 | ||
fd2421f5 AK |
482 | static int v9fs_set_inode(struct inode *inode, void *data) |
483 | { | |
484 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
485 | struct p9_wstat *st = (struct p9_wstat *)data; | |
486 | ||
487 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
488 | return 0; | |
489 | } | |
490 | ||
5ffc0cb3 AK |
491 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
492 | struct p9_qid *qid, | |
ed80fcfa AK |
493 | struct p9_wstat *st, |
494 | int new) | |
6a3124a3 | 495 | { |
45089142 | 496 | dev_t rdev; |
5ffc0cb3 AK |
497 | int retval, umode; |
498 | unsigned long i_ino; | |
499 | struct inode *inode; | |
500 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
ed80fcfa AK |
501 | int (*test)(struct inode *, void *); |
502 | ||
503 | if (new) | |
504 | test = v9fs_test_new_inode; | |
505 | else | |
506 | test = v9fs_test_inode; | |
2bad8471 | 507 | |
5ffc0cb3 | 508 | i_ino = v9fs_qid2ino(qid); |
ed80fcfa | 509 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
5ffc0cb3 AK |
510 | if (!inode) |
511 | return ERR_PTR(-ENOMEM); | |
512 | if (!(inode->i_state & I_NEW)) | |
513 | return inode; | |
514 | /* | |
515 | * initialize the inode with the stat info | |
516 | * FIXME!! we may need support for stale inodes | |
517 | * later. | |
518 | */ | |
fd2421f5 | 519 | inode->i_ino = i_ino; |
45089142 AK |
520 | umode = p9mode2unixmode(v9ses, st, &rdev); |
521 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); | |
5ffc0cb3 | 522 | if (retval) |
6a3124a3 | 523 | goto error; |
60e78d2c | 524 | |
5ffc0cb3 | 525 | v9fs_stat2inode(st, inode, sb); |
60e78d2c | 526 | #ifdef CONFIG_9P_FSCACHE |
5ffc0cb3 | 527 | v9fs_cache_inode_get_cookie(inode); |
60e78d2c | 528 | #endif |
5ffc0cb3 AK |
529 | unlock_new_inode(inode); |
530 | return inode; | |
6a3124a3 | 531 | error: |
5ffc0cb3 AK |
532 | unlock_new_inode(inode); |
533 | iput(inode); | |
534 | return ERR_PTR(retval); | |
535 | ||
536 | } | |
537 | ||
538 | struct inode * | |
a78ce05d | 539 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 540 | struct super_block *sb, int new) |
5ffc0cb3 AK |
541 | { |
542 | struct p9_wstat *st; | |
543 | struct inode *inode = NULL; | |
544 | ||
545 | st = p9_client_stat(fid); | |
546 | if (IS_ERR(st)) | |
547 | return ERR_CAST(st); | |
548 | ||
ed80fcfa | 549 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
02bc3567 | 550 | p9stat_free(st); |
bd238fb4 | 551 | kfree(st); |
5ffc0cb3 | 552 | return inode; |
2bad8471 EVH |
553 | } |
554 | ||
f88657ce AK |
555 | /** |
556 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to | |
557 | * plan 9 AT flag. | |
558 | * @flags: flags to convert | |
559 | */ | |
560 | static int v9fs_at_to_dotl_flags(int flags) | |
561 | { | |
562 | int rflags = 0; | |
563 | if (flags & AT_REMOVEDIR) | |
564 | rflags |= P9_DOTL_AT_REMOVEDIR; | |
565 | return rflags; | |
566 | } | |
567 | ||
2bad8471 EVH |
568 | /** |
569 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 | 570 | * @dir: directory inode that is being deleted |
48e370ff | 571 | * @dentry: dentry that is being deleted |
73c592b9 | 572 | * @rmdir: removing a directory |
2bad8471 EVH |
573 | * |
574 | */ | |
575 | ||
48e370ff | 576 | static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) |
2bad8471 | 577 | { |
48e370ff AK |
578 | struct inode *inode; |
579 | int retval = -EOPNOTSUPP; | |
580 | struct p9_fid *v9fid, *dfid; | |
581 | struct v9fs_session_info *v9ses; | |
2bad8471 | 582 | |
5d385153 JP |
583 | p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
584 | dir, dentry, flags); | |
2bad8471 | 585 | |
48e370ff AK |
586 | v9ses = v9fs_inode2v9ses(dir); |
587 | inode = dentry->d_inode; | |
588 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
589 | if (IS_ERR(dfid)) { | |
590 | retval = PTR_ERR(dfid); | |
5d385153 | 591 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
48e370ff AK |
592 | return retval; |
593 | } | |
594 | if (v9fs_proto_dotl(v9ses)) | |
f88657ce AK |
595 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
596 | v9fs_at_to_dotl_flags(flags)); | |
48e370ff AK |
597 | if (retval == -EOPNOTSUPP) { |
598 | /* Try the one based on path */ | |
599 | v9fid = v9fs_fid_clone(dentry); | |
600 | if (IS_ERR(v9fid)) | |
601 | return PTR_ERR(v9fid); | |
602 | retval = p9_client_remove(v9fid); | |
603 | } | |
b271ec47 AK |
604 | if (!retval) { |
605 | /* | |
606 | * directories on unlink should have zero | |
607 | * link count | |
608 | */ | |
48e370ff AK |
609 | if (flags & AT_REMOVEDIR) { |
610 | clear_nlink(inode); | |
b271ec47 AK |
611 | drop_nlink(dir); |
612 | } else | |
48e370ff | 613 | drop_nlink(inode); |
d28c61f0 | 614 | |
48e370ff | 615 | v9fs_invalidate_inode_attr(inode); |
d28c61f0 | 616 | v9fs_invalidate_inode_attr(dir); |
b271ec47 | 617 | } |
d994f405 | 618 | return retval; |
2bad8471 EVH |
619 | } |
620 | ||
621 | /** | |
bd238fb4 | 622 | * v9fs_create - Create a file |
ee443996 EVH |
623 | * @v9ses: session information |
624 | * @dir: directory that dentry is being created in | |
bd238fb4 | 625 | * @dentry: dentry that is being created |
0e15597e | 626 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
627 | * @perm: create permissions |
628 | * @mode: open mode | |
2bad8471 EVH |
629 | * |
630 | */ | |
bd238fb4 LI |
631 | static struct p9_fid * |
632 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
633 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 634 | { |
6a3124a3 | 635 | int err; |
bd238fb4 LI |
636 | char *name; |
637 | struct p9_fid *dfid, *ofid, *fid; | |
6a3124a3 | 638 | struct inode *inode; |
6a3124a3 | 639 | |
5d385153 | 640 | p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
51a87c55 | 641 | |
bd238fb4 LI |
642 | err = 0; |
643 | ofid = NULL; | |
644 | fid = NULL; | |
645 | name = (char *) dentry->d_name.name; | |
6d27e64d | 646 | dfid = v9fs_fid_lookup(dentry->d_parent); |
ba17674f | 647 | if (IS_ERR(dfid)) { |
da977b2c | 648 | err = PTR_ERR(dfid); |
5d385153 | 649 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
6d27e64d | 650 | return ERR_PTR(err); |
da977b2c | 651 | } |
6a3124a3 | 652 | |
bd238fb4 LI |
653 | /* clone a fid to use for creation */ |
654 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
655 | if (IS_ERR(ofid)) { | |
656 | err = PTR_ERR(ofid); | |
5d385153 | 657 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6d27e64d | 658 | return ERR_PTR(err); |
bd238fb4 | 659 | } |
6a3124a3 | 660 | |
bd238fb4 | 661 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 662 | if (err < 0) { |
5d385153 | 663 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
bd238fb4 | 664 | goto error; |
51a87c55 | 665 | } |
6a3124a3 | 666 | |
bd238fb4 | 667 | /* now walk from the parent so we can get unopened fid */ |
6d27e64d | 668 | fid = p9_client_walk(dfid, 1, &name, 1); |
bd238fb4 LI |
669 | if (IS_ERR(fid)) { |
670 | err = PTR_ERR(fid); | |
5d385153 | 671 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
bd238fb4 | 672 | fid = NULL; |
6a3124a3 | 673 | goto error; |
6d27e64d | 674 | } |
6a3124a3 | 675 | |
bd238fb4 | 676 | /* instantiate inode and assign the unopened fid to the dentry */ |
ed80fcfa | 677 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
6a3124a3 LI |
678 | if (IS_ERR(inode)) { |
679 | err = PTR_ERR(inode); | |
5d385153 | 680 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
6a3124a3 LI |
681 | goto error; |
682 | } | |
50fb6d2b AK |
683 | err = v9fs_fid_add(dentry, fid); |
684 | if (err < 0) | |
685 | goto error; | |
5441ae5e | 686 | d_instantiate(dentry, inode); |
bd238fb4 | 687 | return ofid; |
bd238fb4 | 688 | error: |
bd238fb4 LI |
689 | if (ofid) |
690 | p9_client_clunk(ofid); | |
691 | ||
692 | if (fid) | |
693 | p9_client_clunk(fid); | |
694 | ||
695 | return ERR_PTR(err); | |
696 | } | |
697 | ||
698 | /** | |
699 | * v9fs_vfs_create - VFS hook to create files | |
ee443996 | 700 | * @dir: directory inode that is being created |
bd238fb4 LI |
701 | * @dentry: dentry that is being deleted |
702 | * @mode: create permissions | |
703 | * @nd: path information | |
704 | * | |
705 | */ | |
6a3124a3 | 706 | |
bd238fb4 LI |
707 | static int |
708 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, | |
709 | struct nameidata *nd) | |
710 | { | |
711 | int err; | |
712 | u32 perm; | |
713 | int flags; | |
6b39f6d2 AK |
714 | struct file *filp; |
715 | struct v9fs_inode *v9inode; | |
bd238fb4 | 716 | struct v9fs_session_info *v9ses; |
3cf387d7 | 717 | struct p9_fid *fid, *inode_fid; |
bd238fb4 LI |
718 | |
719 | err = 0; | |
720 | fid = NULL; | |
721 | v9ses = v9fs_inode2v9ses(dir); | |
722 | perm = unixmode2p9mode(v9ses, mode); | |
dd7dd556 | 723 | if (nd) |
8a5e929d | 724 | flags = nd->intent.open.flags; |
bd238fb4 LI |
725 | else |
726 | flags = O_RDWR; | |
727 | ||
728 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
dd6102fb SK |
729 | v9fs_uflags2omode(flags, |
730 | v9fs_proto_dotu(v9ses))); | |
bd238fb4 LI |
731 | if (IS_ERR(fid)) { |
732 | err = PTR_ERR(fid); | |
733 | fid = NULL; | |
734 | goto error; | |
735 | } | |
736 | ||
d28c61f0 | 737 | v9fs_invalidate_inode_attr(dir); |
bd238fb4 | 738 | /* if we are opening a file, assign the open fid to the file */ |
dd7dd556 | 739 | if (nd) { |
6b39f6d2 | 740 | v9inode = V9FS_I(dentry->d_inode); |
5a7e0a8c | 741 | mutex_lock(&v9inode->v_mutex); |
7add697a AK |
742 | if (v9ses->cache && !v9inode->writeback_fid && |
743 | ((flags & O_ACCMODE) != O_RDONLY)) { | |
3cf387d7 | 744 | /* |
6b39f6d2 | 745 | * clone a fid and add it to writeback_fid |
3cf387d7 AK |
746 | * we do it during open time instead of |
747 | * page dirty time via write_begin/page_mkwrite | |
748 | * because we want write after unlink usecase | |
749 | * to work. | |
750 | */ | |
751 | inode_fid = v9fs_writeback_fid(dentry); | |
752 | if (IS_ERR(inode_fid)) { | |
753 | err = PTR_ERR(inode_fid); | |
5a7e0a8c | 754 | mutex_unlock(&v9inode->v_mutex); |
3cf387d7 AK |
755 | goto error; |
756 | } | |
6b39f6d2 | 757 | v9inode->writeback_fid = (void *) inode_fid; |
3cf387d7 | 758 | } |
5a7e0a8c | 759 | mutex_unlock(&v9inode->v_mutex); |
877cb3d4 | 760 | filp = lookup_instantiate_filp(nd, dentry, generic_file_open); |
6a3124a3 | 761 | if (IS_ERR(filp)) { |
bd238fb4 LI |
762 | err = PTR_ERR(filp); |
763 | goto error; | |
6a3124a3 LI |
764 | } |
765 | ||
bd238fb4 | 766 | filp->private_data = fid; |
46848de0 AK |
767 | #ifdef CONFIG_9P_FSCACHE |
768 | if (v9ses->cache) | |
769 | v9fs_cache_inode_set_cookie(dentry->d_inode, filp); | |
770 | #endif | |
bd238fb4 LI |
771 | } else |
772 | p9_client_clunk(fid); | |
6a3124a3 LI |
773 | |
774 | return 0; | |
775 | ||
776 | error: | |
bd238fb4 LI |
777 | if (fid) |
778 | p9_client_clunk(fid); | |
6a3124a3 | 779 | |
6a3124a3 | 780 | return err; |
2bad8471 EVH |
781 | } |
782 | ||
783 | /** | |
784 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 785 | * @dir: inode that is being unlinked |
2bad8471 EVH |
786 | * @dentry: dentry that is being unlinked |
787 | * @mode: mode for new directory | |
788 | * | |
789 | */ | |
790 | ||
6a3124a3 | 791 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
2bad8471 | 792 | { |
6a3124a3 | 793 | int err; |
bd238fb4 | 794 | u32 perm; |
bd238fb4 | 795 | struct p9_fid *fid; |
d28c61f0 | 796 | struct v9fs_session_info *v9ses; |
6a3124a3 | 797 | |
5d385153 | 798 | p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
bd238fb4 | 799 | err = 0; |
6a3124a3 | 800 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 801 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
802 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
803 | if (IS_ERR(fid)) { | |
804 | err = PTR_ERR(fid); | |
805 | fid = NULL; | |
d28c61f0 | 806 | } else { |
b271ec47 | 807 | inc_nlink(dir); |
d28c61f0 AK |
808 | v9fs_invalidate_inode_attr(dir); |
809 | } | |
6a3124a3 | 810 | |
bd238fb4 LI |
811 | if (fid) |
812 | p9_client_clunk(fid); | |
6a3124a3 | 813 | |
6a3124a3 | 814 | return err; |
2bad8471 EVH |
815 | } |
816 | ||
817 | /** | |
818 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
819 | * @dir: inode that is being walked from | |
820 | * @dentry: dentry that is being walked to? | |
821 | * @nameidata: path data | |
822 | * | |
823 | */ | |
824 | ||
53c06f4e | 825 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
2bad8471 EVH |
826 | struct nameidata *nameidata) |
827 | { | |
73f50717 | 828 | struct dentry *res; |
2bad8471 EVH |
829 | struct super_block *sb; |
830 | struct v9fs_session_info *v9ses; | |
bd238fb4 | 831 | struct p9_fid *dfid, *fid; |
2bad8471 | 832 | struct inode *inode; |
bd238fb4 | 833 | char *name; |
2bad8471 EVH |
834 | int result = 0; |
835 | ||
5d385153 JP |
836 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", |
837 | dir, dentry->d_name.name, dentry, nameidata); | |
2bad8471 | 838 | |
11e9b49b SK |
839 | if (dentry->d_name.len > NAME_MAX) |
840 | return ERR_PTR(-ENAMETOOLONG); | |
841 | ||
2bad8471 EVH |
842 | sb = dir->i_sb; |
843 | v9ses = v9fs_inode2v9ses(dir); | |
a534c8d1 | 844 | /* We can walk d_parent because we hold the dir->i_mutex */ |
bd238fb4 LI |
845 | dfid = v9fs_fid_lookup(dentry->d_parent); |
846 | if (IS_ERR(dfid)) | |
e231c2ee | 847 | return ERR_CAST(dfid); |
bd238fb4 LI |
848 | |
849 | name = (char *) dentry->d_name.name; | |
850 | fid = p9_client_walk(dfid, 1, &name, 1); | |
851 | if (IS_ERR(fid)) { | |
852 | result = PTR_ERR(fid); | |
2bad8471 | 853 | if (result == -ENOENT) { |
85e0df24 AK |
854 | inode = NULL; |
855 | goto inst_out; | |
2bad8471 | 856 | } |
2bad8471 | 857 | |
bd238fb4 | 858 | return ERR_PTR(result); |
2bad8471 | 859 | } |
73f50717 AK |
860 | /* |
861 | * Make sure we don't use a wrong inode due to parallel | |
862 | * unlink. For cached mode create calls request for new | |
863 | * inode. But with cache disabled, lookup should do this. | |
864 | */ | |
865 | if (v9ses->cache) | |
866 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); | |
867 | else | |
868 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
bd238fb4 LI |
869 | if (IS_ERR(inode)) { |
870 | result = PTR_ERR(inode); | |
871 | inode = NULL; | |
872 | goto error; | |
2bad8471 | 873 | } |
bd238fb4 | 874 | result = v9fs_fid_add(dentry, fid); |
6a3124a3 | 875 | if (result < 0) |
9856af8b | 876 | goto error_iput; |
85e0df24 | 877 | inst_out: |
73f50717 AK |
878 | /* |
879 | * If we had a rename on the server and a parallel lookup | |
880 | * for the new name, then make sure we instantiate with | |
881 | * the new name. ie look up for a/b, while on server somebody | |
882 | * moved b under k and client parallely did a lookup for | |
883 | * k/b. | |
884 | */ | |
885 | res = d_materialise_unique(dentry, inode); | |
886 | if (!IS_ERR(res)) | |
887 | return res; | |
888 | result = PTR_ERR(res); | |
9856af8b AK |
889 | error_iput: |
890 | iput(inode); | |
bd238fb4 | 891 | error: |
62aa528e | 892 | p9_client_clunk(fid); |
da977b2c | 893 | |
2bad8471 EVH |
894 | return ERR_PTR(result); |
895 | } | |
896 | ||
897 | /** | |
898 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
899 | * @i: inode that is being unlinked | |
73c592b9 | 900 | * @d: dentry that is being unlinked |
2bad8471 EVH |
901 | * |
902 | */ | |
903 | ||
53c06f4e | 904 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
905 | { |
906 | return v9fs_remove(i, d, 0); | |
907 | } | |
908 | ||
909 | /** | |
910 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
911 | * @i: inode that is being unlinked | |
73c592b9 | 912 | * @d: dentry that is being unlinked |
2bad8471 EVH |
913 | * |
914 | */ | |
915 | ||
53c06f4e | 916 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 917 | { |
48e370ff | 918 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
919 | } |
920 | ||
921 | /** | |
922 | * v9fs_vfs_rename - VFS hook to rename an inode | |
923 | * @old_dir: old dir inode | |
924 | * @old_dentry: old dentry | |
925 | * @new_dir: new dir inode | |
926 | * @new_dentry: new dentry | |
927 | * | |
928 | */ | |
929 | ||
53c06f4e | 930 | int |
2bad8471 EVH |
931 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
932 | struct inode *new_dir, struct dentry *new_dentry) | |
933 | { | |
d28c61f0 | 934 | int retval; |
bd238fb4 | 935 | struct inode *old_inode; |
b271ec47 | 936 | struct inode *new_inode; |
bd238fb4 LI |
937 | struct v9fs_session_info *v9ses; |
938 | struct p9_fid *oldfid; | |
939 | struct p9_fid *olddirfid; | |
940 | struct p9_fid *newdirfid; | |
941 | struct p9_wstat wstat; | |
2bad8471 | 942 | |
5d385153 | 943 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 LI |
944 | retval = 0; |
945 | old_inode = old_dentry->d_inode; | |
b271ec47 | 946 | new_inode = new_dentry->d_inode; |
bd238fb4 LI |
947 | v9ses = v9fs_inode2v9ses(old_inode); |
948 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 949 | if (IS_ERR(oldfid)) |
da977b2c EVH |
950 | return PTR_ERR(oldfid); |
951 | ||
952 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); | |
ba17674f | 953 | if (IS_ERR(olddirfid)) { |
da977b2c | 954 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 955 | goto done; |
da977b2c EVH |
956 | } |
957 | ||
958 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); | |
ba17674f | 959 | if (IS_ERR(newdirfid)) { |
da977b2c | 960 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 961 | goto clunk_olddir; |
2bad8471 EVH |
962 | } |
963 | ||
a534c8d1 | 964 | down_write(&v9ses->rename_sem); |
4681dbda | 965 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
966 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
967 | newdirfid, new_dentry->d_name.name); | |
968 | if (retval == -EOPNOTSUPP) | |
969 | retval = p9_client_rename(oldfid, newdirfid, | |
970 | new_dentry->d_name.name); | |
971 | if (retval != -EOPNOTSUPP) | |
4681dbda SK |
972 | goto clunk_newdir; |
973 | } | |
a534c8d1 AK |
974 | if (old_dentry->d_parent != new_dentry->d_parent) { |
975 | /* | |
976 | * 9P .u can only handle file rename in the same directory | |
977 | */ | |
4681dbda | 978 | |
5d385153 | 979 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 980 | retval = -EXDEV; |
bd238fb4 | 981 | goto clunk_newdir; |
2bad8471 | 982 | } |
531b1094 | 983 | v9fs_blank_wstat(&wstat); |
ba17674f | 984 | wstat.muid = v9ses->uname; |
531b1094 | 985 | wstat.name = (char *) new_dentry->d_name.name; |
bd238fb4 | 986 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 987 | |
bd238fb4 | 988 | clunk_newdir: |
b271ec47 AK |
989 | if (!retval) { |
990 | if (new_inode) { | |
991 | if (S_ISDIR(new_inode->i_mode)) | |
992 | clear_nlink(new_inode); | |
993 | else | |
994 | drop_nlink(new_inode); | |
995 | } | |
996 | if (S_ISDIR(old_inode->i_mode)) { | |
997 | if (!new_inode) | |
998 | inc_nlink(new_dir); | |
999 | drop_nlink(old_dir); | |
1000 | } | |
3bc86de3 | 1001 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
1002 | v9fs_invalidate_inode_attr(old_dir); |
1003 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 1004 | |
a534c8d1 AK |
1005 | /* successful rename */ |
1006 | d_move(old_dentry, new_dentry); | |
b271ec47 | 1007 | } |
a534c8d1 | 1008 | up_write(&v9ses->rename_sem); |
22150c4f | 1009 | p9_client_clunk(newdirfid); |
2bad8471 | 1010 | |
bd238fb4 | 1011 | clunk_olddir: |
22150c4f | 1012 | p9_client_clunk(olddirfid); |
da977b2c | 1013 | |
bd238fb4 | 1014 | done: |
2bad8471 EVH |
1015 | return retval; |
1016 | } | |
1017 | ||
1018 | /** | |
943ffb58 | 1019 | * v9fs_vfs_getattr - retrieve file metadata |
ee443996 EVH |
1020 | * @mnt: mount information |
1021 | * @dentry: file to get attributes on | |
1022 | * @stat: metadata structure to populate | |
2bad8471 EVH |
1023 | * |
1024 | */ | |
1025 | ||
1026 | static int | |
1027 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1028 | struct kstat *stat) | |
1029 | { | |
bd238fb4 LI |
1030 | int err; |
1031 | struct v9fs_session_info *v9ses; | |
1032 | struct p9_fid *fid; | |
51a87c55 | 1033 | struct p9_wstat *st; |
bd238fb4 | 1034 | |
5d385153 | 1035 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
bd238fb4 | 1036 | err = -EPERM; |
42869c8a | 1037 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 AK |
1038 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
1039 | generic_fillattr(dentry->d_inode, stat); | |
1040 | return 0; | |
1041 | } | |
bd238fb4 LI |
1042 | fid = v9fs_fid_lookup(dentry); |
1043 | if (IS_ERR(fid)) | |
da977b2c | 1044 | return PTR_ERR(fid); |
2bad8471 | 1045 | |
bd238fb4 LI |
1046 | st = p9_client_stat(fid); |
1047 | if (IS_ERR(st)) | |
1048 | return PTR_ERR(st); | |
2bad8471 | 1049 | |
bd238fb4 | 1050 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
45089142 | 1051 | generic_fillattr(dentry->d_inode, stat); |
2bad8471 | 1052 | |
62b2be59 | 1053 | p9stat_free(st); |
bd238fb4 LI |
1054 | kfree(st); |
1055 | return 0; | |
2bad8471 EVH |
1056 | } |
1057 | ||
1058 | /** | |
1059 | * v9fs_vfs_setattr - set file metadata | |
1060 | * @dentry: file whose metadata to set | |
1061 | * @iattr: metadata assignment structure | |
1062 | * | |
1063 | */ | |
1064 | ||
1065 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
1066 | { | |
bd238fb4 LI |
1067 | int retval; |
1068 | struct v9fs_session_info *v9ses; | |
1069 | struct p9_fid *fid; | |
1070 | struct p9_wstat wstat; | |
2bad8471 | 1071 | |
5d385153 | 1072 | p9_debug(P9_DEBUG_VFS, "\n"); |
059c138b AK |
1073 | retval = inode_change_ok(dentry->d_inode, iattr); |
1074 | if (retval) | |
1075 | return retval; | |
1076 | ||
bd238fb4 | 1077 | retval = -EPERM; |
42869c8a | 1078 | v9ses = v9fs_dentry2v9ses(dentry); |
bd238fb4 | 1079 | fid = v9fs_fid_lookup(dentry); |
da977b2c EVH |
1080 | if(IS_ERR(fid)) |
1081 | return PTR_ERR(fid); | |
2bad8471 | 1082 | |
531b1094 | 1083 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1084 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1085 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1086 | |
1087 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1088 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1089 | |
1090 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1091 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1092 | |
1093 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1094 | wstat.length = iattr->ia_size; |
2bad8471 | 1095 | |
dd6102fb | 1096 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1097 | if (iattr->ia_valid & ATTR_UID) |
1098 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1099 | |
531b1094 LI |
1100 | if (iattr->ia_valid & ATTR_GID) |
1101 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1102 | } |
059c138b | 1103 | |
3dc5436a AK |
1104 | /* Write all dirty data */ |
1105 | if (S_ISREG(dentry->d_inode->i_mode)) | |
1106 | filemap_write_and_wait(dentry->d_inode->i_mapping); | |
1107 | ||
f10fc50f AK |
1108 | retval = p9_client_wstat(fid, &wstat); |
1109 | if (retval < 0) | |
1110 | return retval; | |
059c138b AK |
1111 | |
1112 | if ((iattr->ia_valid & ATTR_SIZE) && | |
1113 | iattr->ia_size != i_size_read(dentry->d_inode)) | |
1114 | truncate_setsize(dentry->d_inode, iattr->ia_size); | |
1115 | ||
f10fc50f | 1116 | v9fs_invalidate_inode_attr(dentry->d_inode); |
2bad8471 | 1117 | |
1025774c CH |
1118 | setattr_copy(dentry->d_inode, iattr); |
1119 | mark_inode_dirty(dentry->d_inode); | |
1120 | return 0; | |
2bad8471 EVH |
1121 | } |
1122 | ||
1123 | /** | |
531b1094 LI |
1124 | * v9fs_stat2inode - populate an inode structure with mistat info |
1125 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1126 | * @inode: inode to populate |
1127 | * @sb: superblock of filesystem | |
1128 | * | |
1129 | */ | |
1130 | ||
1131 | void | |
51a87c55 | 1132 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
531b1094 | 1133 | struct super_block *sb) |
2bad8471 | 1134 | { |
45089142 | 1135 | mode_t mode; |
531b1094 | 1136 | char ext[32]; |
5717144a AK |
1137 | char tag_name[14]; |
1138 | unsigned int i_nlink; | |
2bad8471 | 1139 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1140 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1141 | |
bfe86848 | 1142 | set_nlink(inode, 1); |
2bad8471 | 1143 | |
531b1094 LI |
1144 | inode->i_atime.tv_sec = stat->atime; |
1145 | inode->i_mtime.tv_sec = stat->mtime; | |
1146 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1147 | |
bd32b82d LI |
1148 | inode->i_uid = v9ses->dfltuid; |
1149 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1150 | |
dd6102fb | 1151 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1152 | inode->i_uid = stat->n_uid; |
1153 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1154 | } |
5717144a AK |
1155 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
1156 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { | |
1157 | /* | |
1158 | * Hadlink support got added later to | |
1159 | * to the .u extension. So there can be | |
1160 | * server out there that doesn't support | |
1161 | * this even with .u extension. So check | |
1162 | * for non NULL stat->extension | |
1163 | */ | |
1164 | strncpy(ext, stat->extension, sizeof(ext)); | |
1165 | /* HARDLINKCOUNT %u */ | |
1166 | sscanf(ext, "%13s %u", tag_name, &i_nlink); | |
1167 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) | |
bfe86848 | 1168 | set_nlink(inode, i_nlink); |
5717144a AK |
1169 | } |
1170 | } | |
45089142 AK |
1171 | mode = stat->mode & S_IALLUGO; |
1172 | mode |= inode->i_mode & ~S_IALLUGO; | |
1173 | inode->i_mode = mode; | |
7549ae3e | 1174 | i_size_write(inode, stat->length); |
2bad8471 | 1175 | |
bd238fb4 | 1176 | /* not real number of blocks, but 512 byte ones ... */ |
7549ae3e | 1177 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
b3cbea03 | 1178 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1179 | } |
1180 | ||
1181 | /** | |
1182 | * v9fs_qid2ino - convert qid into inode number | |
1183 | * @qid: qid to hash | |
1184 | * | |
1185 | * BUG: potential for inode number collisions? | |
1186 | */ | |
1187 | ||
bd238fb4 | 1188 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1189 | { |
1190 | u64 path = qid->path + 2; | |
1191 | ino_t i = 0; | |
1192 | ||
1193 | if (sizeof(ino_t) == sizeof(path)) | |
1194 | memcpy(&i, &path, sizeof(ino_t)); | |
1195 | else | |
1196 | i = (ino_t) (path ^ (path >> 32)); | |
1197 | ||
1198 | return i; | |
1199 | } | |
1200 | ||
2bad8471 EVH |
1201 | /** |
1202 | * v9fs_readlink - read a symlink's location (internal version) | |
1203 | * @dentry: dentry for symlink | |
73c592b9 | 1204 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
1205 | * @buflen: length of buffer |
1206 | * | |
1207 | */ | |
1208 | ||
1209 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
1210 | { | |
bd238fb4 | 1211 | int retval; |
2bad8471 | 1212 | |
bd238fb4 LI |
1213 | struct v9fs_session_info *v9ses; |
1214 | struct p9_fid *fid; | |
51a87c55 | 1215 | struct p9_wstat *st; |
2bad8471 | 1216 | |
5d385153 | 1217 | p9_debug(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
bd238fb4 | 1218 | retval = -EPERM; |
42869c8a | 1219 | v9ses = v9fs_dentry2v9ses(dentry); |
bd238fb4 | 1220 | fid = v9fs_fid_lookup(dentry); |
ba17674f | 1221 | if (IS_ERR(fid)) |
da977b2c | 1222 | return PTR_ERR(fid); |
2bad8471 | 1223 | |
329176cc | 1224 | if (!v9fs_proto_dotu(v9ses)) |
bd238fb4 | 1225 | return -EBADF; |
2bad8471 | 1226 | |
bd238fb4 LI |
1227 | st = p9_client_stat(fid); |
1228 | if (IS_ERR(st)) | |
1229 | return PTR_ERR(st); | |
2bad8471 | 1230 | |
bd238fb4 | 1231 | if (!(st->mode & P9_DMSYMLINK)) { |
2bad8471 | 1232 | retval = -EINVAL; |
bd238fb4 | 1233 | goto done; |
2bad8471 EVH |
1234 | } |
1235 | ||
1236 | /* copy extension buffer into buffer */ | |
51a87c55 | 1237 | strncpy(buffer, st->extension, buflen); |
2bad8471 | 1238 | |
5d385153 JP |
1239 | p9_debug(P9_DEBUG_VFS, "%s -> %s (%s)\n", |
1240 | dentry->d_name.name, st->extension, buffer); | |
2bad8471 | 1241 | |
2511cd0b | 1242 | retval = strnlen(buffer, buflen); |
bd238fb4 | 1243 | done: |
62b2be59 | 1244 | p9stat_free(st); |
bd238fb4 | 1245 | kfree(st); |
2bad8471 EVH |
1246 | return retval; |
1247 | } | |
1248 | ||
2bad8471 EVH |
1249 | /** |
1250 | * v9fs_vfs_follow_link - follow a symlink path | |
1251 | * @dentry: dentry for symlink | |
1252 | * @nd: nameidata | |
1253 | * | |
1254 | */ | |
1255 | ||
1256 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1257 | { | |
1258 | int len = 0; | |
1259 | char *link = __getname(); | |
1260 | ||
5d385153 | 1261 | p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); |
2bad8471 EVH |
1262 | |
1263 | if (!link) | |
1264 | link = ERR_PTR(-ENOMEM); | |
1265 | else { | |
16cce6d2 | 1266 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
1267 | |
1268 | if (len < 0) { | |
ce44eeb6 | 1269 | __putname(link); |
2bad8471 EVH |
1270 | link = ERR_PTR(len); |
1271 | } else | |
2511cd0b | 1272 | link[min(len, PATH_MAX-1)] = 0; |
2bad8471 EVH |
1273 | } |
1274 | nd_set_link(nd, link); | |
1275 | ||
1276 | return NULL; | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * v9fs_vfs_put_link - release a symlink path | |
1281 | * @dentry: dentry for symlink | |
1282 | * @nd: nameidata | |
ee443996 | 1283 | * @p: unused |
2bad8471 EVH |
1284 | * |
1285 | */ | |
1286 | ||
53c06f4e | 1287 | void |
ee443996 | 1288 | v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
2bad8471 EVH |
1289 | { |
1290 | char *s = nd_get_link(nd); | |
1291 | ||
5d385153 JP |
1292 | p9_debug(P9_DEBUG_VFS, " %s %s\n", |
1293 | dentry->d_name.name, IS_ERR(s) ? "<error>" : s); | |
2bad8471 | 1294 | if (!IS_ERR(s)) |
ce44eeb6 | 1295 | __putname(s); |
2bad8471 EVH |
1296 | } |
1297 | ||
ee443996 EVH |
1298 | /** |
1299 | * v9fs_vfs_mkspecial - create a special file | |
1300 | * @dir: inode to create special file in | |
1301 | * @dentry: dentry to create | |
1302 | * @mode: mode to create special file | |
1303 | * @extension: 9p2000.u format extension string representing special file | |
1304 | * | |
1305 | */ | |
1306 | ||
531b1094 LI |
1307 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
1308 | int mode, const char *extension) | |
2bad8471 | 1309 | { |
bd238fb4 | 1310 | u32 perm; |
bd238fb4 | 1311 | struct p9_fid *fid; |
d28c61f0 | 1312 | struct v9fs_session_info *v9ses; |
2bad8471 | 1313 | |
6a3124a3 | 1314 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1315 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1316 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1317 | return -EPERM; |
2bad8471 EVH |
1318 | } |
1319 | ||
da977b2c | 1320 | perm = unixmode2p9mode(v9ses, mode); |
bd238fb4 LI |
1321 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1322 | P9_OREAD); | |
1323 | if (IS_ERR(fid)) | |
1324 | return PTR_ERR(fid); | |
da977b2c | 1325 | |
d28c61f0 | 1326 | v9fs_invalidate_inode_attr(dir); |
bd238fb4 | 1327 | p9_client_clunk(fid); |
6a3124a3 | 1328 | return 0; |
531b1094 LI |
1329 | } |
1330 | ||
1331 | /** | |
1332 | * v9fs_vfs_symlink - helper function to create symlinks | |
1333 | * @dir: directory inode containing symlink | |
1334 | * @dentry: dentry for symlink | |
1335 | * @symname: symlink data | |
1336 | * | |
ee443996 | 1337 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1338 | * |
1339 | */ | |
1340 | ||
1341 | static int | |
1342 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1343 | { | |
5d385153 JP |
1344 | p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", |
1345 | dir->i_ino, dentry->d_name.name, symname); | |
531b1094 LI |
1346 | |
1347 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1348 | } | |
1349 | ||
1350 | /** | |
1351 | * v9fs_vfs_link - create a hardlink | |
1352 | * @old_dentry: dentry for file to link to | |
1353 | * @dir: inode destination for new link | |
1354 | * @dentry: dentry for link | |
1355 | * | |
1356 | */ | |
1357 | ||
531b1094 LI |
1358 | static int |
1359 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1360 | struct dentry *dentry) | |
1361 | { | |
1362 | int retval; | |
531b1094 | 1363 | char *name; |
d28c61f0 | 1364 | struct p9_fid *oldfid; |
531b1094 | 1365 | |
5d385153 JP |
1366 | p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", |
1367 | dir->i_ino, dentry->d_name.name, old_dentry->d_name.name); | |
531b1094 | 1368 | |
da977b2c | 1369 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1370 | if (IS_ERR(oldfid)) |
da977b2c | 1371 | return PTR_ERR(oldfid); |
531b1094 LI |
1372 | |
1373 | name = __getname(); | |
da977b2c EVH |
1374 | if (unlikely(!name)) { |
1375 | retval = -ENOMEM; | |
1376 | goto clunk_fid; | |
1377 | } | |
0710d36a | 1378 | |
16cce6d2 | 1379 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1380 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
531b1094 | 1381 | __putname(name); |
c06c066a AK |
1382 | if (!retval) { |
1383 | v9fs_refresh_inode(oldfid, old_dentry->d_inode); | |
d28c61f0 | 1384 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1385 | } |
da977b2c | 1386 | clunk_fid: |
bd238fb4 | 1387 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1388 | return retval; |
1389 | } | |
1390 | ||
1391 | /** | |
1392 | * v9fs_vfs_mknod - create a special file | |
1393 | * @dir: inode destination for new link | |
1394 | * @dentry: dentry for file | |
1395 | * @mode: mode for creation | |
ee443996 | 1396 | * @rdev: device associated with special file |
2bad8471 EVH |
1397 | * |
1398 | */ | |
1399 | ||
1400 | static int | |
1401 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1402 | { | |
531b1094 LI |
1403 | int retval; |
1404 | char *name; | |
2bad8471 | 1405 | |
5d385153 JP |
1406 | p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", |
1407 | dir->i_ino, dentry->d_name.name, mode, | |
1408 | MAJOR(rdev), MINOR(rdev)); | |
2bad8471 | 1409 | |
531b1094 LI |
1410 | if (!new_valid_dev(rdev)) |
1411 | return -EINVAL; | |
2bad8471 | 1412 | |
531b1094 | 1413 | name = __getname(); |
c0291a05 ET |
1414 | if (!name) |
1415 | return -ENOMEM; | |
2bad8471 EVH |
1416 | /* build extension */ |
1417 | if (S_ISBLK(mode)) | |
531b1094 | 1418 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1419 | else if (S_ISCHR(mode)) |
531b1094 | 1420 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1421 | else if (S_ISFIFO(mode)) |
531b1094 | 1422 | *name = 0; |
75cc5c9b VJ |
1423 | else if (S_ISSOCK(mode)) |
1424 | *name = 0; | |
2bad8471 | 1425 | else { |
531b1094 LI |
1426 | __putname(name); |
1427 | return -EINVAL; | |
2bad8471 EVH |
1428 | } |
1429 | ||
531b1094 LI |
1430 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1431 | __putname(name); | |
2bad8471 EVH |
1432 | |
1433 | return retval; | |
1434 | } | |
1435 | ||
b3cbea03 AK |
1436 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1437 | { | |
45089142 AK |
1438 | int umode; |
1439 | dev_t rdev; | |
b3cbea03 AK |
1440 | loff_t i_size; |
1441 | struct p9_wstat *st; | |
1442 | struct v9fs_session_info *v9ses; | |
1443 | ||
1444 | v9ses = v9fs_inode2v9ses(inode); | |
1445 | st = p9_client_stat(fid); | |
1446 | if (IS_ERR(st)) | |
1447 | return PTR_ERR(st); | |
45089142 AK |
1448 | /* |
1449 | * Don't update inode if the file type is different | |
1450 | */ | |
1451 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
1452 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) | |
1453 | goto out; | |
b3cbea03 AK |
1454 | |
1455 | spin_lock(&inode->i_lock); | |
1456 | /* | |
1457 | * We don't want to refresh inode->i_size, | |
1458 | * because we may have cached data | |
1459 | */ | |
1460 | i_size = inode->i_size; | |
1461 | v9fs_stat2inode(st, inode, inode->i_sb); | |
1462 | if (v9ses->cache) | |
1463 | inode->i_size = i_size; | |
1464 | spin_unlock(&inode->i_lock); | |
45089142 | 1465 | out: |
b3cbea03 AK |
1466 | p9stat_free(st); |
1467 | kfree(st); | |
1468 | return 0; | |
1469 | } | |
1470 | ||
9b6533c9 SK |
1471 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1472 | .create = v9fs_vfs_create, | |
1473 | .lookup = v9fs_vfs_lookup, | |
1474 | .symlink = v9fs_vfs_symlink, | |
50cc42ff | 1475 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1476 | .unlink = v9fs_vfs_unlink, |
1477 | .mkdir = v9fs_vfs_mkdir, | |
1478 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1479 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1480 | .rename = v9fs_vfs_rename, |
1481 | .getattr = v9fs_vfs_getattr, | |
1482 | .setattr = v9fs_vfs_setattr, | |
1483 | }; | |
1484 | ||
754661f1 | 1485 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1486 | .create = v9fs_vfs_create, |
1487 | .lookup = v9fs_vfs_lookup, | |
1488 | .unlink = v9fs_vfs_unlink, | |
1489 | .mkdir = v9fs_vfs_mkdir, | |
1490 | .rmdir = v9fs_vfs_rmdir, | |
1491 | .mknod = v9fs_vfs_mknod, | |
1492 | .rename = v9fs_vfs_rename, | |
1493 | .getattr = v9fs_vfs_getattr, | |
1494 | .setattr = v9fs_vfs_setattr, | |
1495 | }; | |
1496 | ||
754661f1 | 1497 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1498 | .getattr = v9fs_vfs_getattr, |
1499 | .setattr = v9fs_vfs_setattr, | |
1500 | }; | |
1501 | ||
754661f1 | 1502 | static const struct inode_operations v9fs_symlink_inode_operations = { |
204f2f0e | 1503 | .readlink = generic_readlink, |
2bad8471 EVH |
1504 | .follow_link = v9fs_vfs_follow_link, |
1505 | .put_link = v9fs_vfs_put_link, | |
1506 | .getattr = v9fs_vfs_getattr, | |
1507 | .setattr = v9fs_vfs_setattr, | |
1508 | }; | |
9b6533c9 | 1509 |