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 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/file.h> | |
30 | #include <linux/pagemap.h> | |
31 | #include <linux/stat.h> | |
32 | #include <linux/string.h> | |
2bad8471 EVH |
33 | #include <linux/inet.h> |
34 | #include <linux/namei.h> | |
35 | #include <linux/idr.h> | |
e8edc6e0 | 36 | #include <linux/sched.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
ebf46264 | 38 | #include <linux/xattr.h> |
bd238fb4 LI |
39 | #include <net/9p/9p.h> |
40 | #include <net/9p/client.h> | |
2bad8471 | 41 | |
2bad8471 | 42 | #include "v9fs.h" |
2bad8471 | 43 | #include "v9fs_vfs.h" |
2bad8471 | 44 | #include "fid.h" |
60e78d2c | 45 | #include "cache.h" |
ebf46264 | 46 | #include "xattr.h" |
2bad8471 | 47 | |
754661f1 | 48 | static const struct inode_operations v9fs_dir_inode_operations; |
9b6533c9 SK |
49 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
50 | static const struct inode_operations v9fs_dir_inode_operations_dotl; | |
754661f1 | 51 | static const struct inode_operations v9fs_file_inode_operations; |
9b6533c9 | 52 | static const struct inode_operations v9fs_file_inode_operations_dotl; |
754661f1 | 53 | static const struct inode_operations v9fs_symlink_inode_operations; |
9b6533c9 | 54 | static const struct inode_operations v9fs_symlink_inode_operations_dotl; |
2bad8471 EVH |
55 | |
56 | /** | |
57 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
58 | * @v9ses: v9fs session information | |
59 | * @mode: mode to convert | |
60 | * | |
61 | */ | |
62 | ||
73c592b9 | 63 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
64 | { |
65 | int res; | |
66 | res = mode & 0777; | |
67 | if (S_ISDIR(mode)) | |
bd238fb4 | 68 | res |= P9_DMDIR; |
dd6102fb | 69 | if (v9fs_proto_dotu(v9ses)) { |
2bad8471 | 70 | if (S_ISLNK(mode)) |
bd238fb4 | 71 | res |= P9_DMSYMLINK; |
2bad8471 EVH |
72 | if (v9ses->nodev == 0) { |
73 | if (S_ISSOCK(mode)) | |
bd238fb4 | 74 | res |= P9_DMSOCKET; |
2bad8471 | 75 | if (S_ISFIFO(mode)) |
bd238fb4 | 76 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 77 | if (S_ISBLK(mode)) |
bd238fb4 | 78 | res |= P9_DMDEVICE; |
2bad8471 | 79 | if (S_ISCHR(mode)) |
bd238fb4 | 80 | res |= P9_DMDEVICE; |
2bad8471 EVH |
81 | } |
82 | ||
83 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 84 | res |= P9_DMSETUID; |
2bad8471 | 85 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 86 | res |= P9_DMSETGID; |
d199d652 AL |
87 | if ((mode & S_ISVTX) == S_ISVTX) |
88 | res |= P9_DMSETVTX; | |
bd238fb4 LI |
89 | if ((mode & P9_DMLINK)) |
90 | res |= P9_DMLINK; | |
2bad8471 EVH |
91 | } |
92 | ||
93 | return res; | |
94 | } | |
95 | ||
96 | /** | |
97 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
98 | * @v9ses: v9fs session information | |
99 | * @mode: mode to convert | |
100 | * | |
101 | */ | |
102 | ||
73c592b9 | 103 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
104 | { |
105 | int res; | |
106 | ||
107 | res = mode & 0777; | |
108 | ||
bd238fb4 | 109 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 110 | res |= S_IFDIR; |
dd6102fb | 111 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 112 | res |= S_IFLNK; |
dd6102fb | 113 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
114 | && (v9ses->nodev == 0)) |
115 | res |= S_IFSOCK; | |
dd6102fb | 116 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
117 | && (v9ses->nodev == 0)) |
118 | res |= S_IFIFO; | |
dd6102fb | 119 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
120 | && (v9ses->nodev == 0)) |
121 | res |= S_IFBLK; | |
122 | else | |
123 | res |= S_IFREG; | |
124 | ||
dd6102fb | 125 | if (v9fs_proto_dotu(v9ses)) { |
bd238fb4 | 126 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
2bad8471 EVH |
127 | res |= S_ISUID; |
128 | ||
bd238fb4 | 129 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
2bad8471 | 130 | res |= S_ISGID; |
d199d652 AL |
131 | |
132 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
133 | res |= S_ISVTX; | |
2bad8471 EVH |
134 | } |
135 | ||
136 | return res; | |
137 | } | |
138 | ||
ee443996 EVH |
139 | /** |
140 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
141 | * @uflags: flags to convert | |
2e4bef41 | 142 | * @extended: if .u extensions are active |
ee443996 EVH |
143 | */ |
144 | ||
2e4bef41 | 145 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
146 | { |
147 | int ret; | |
148 | ||
149 | ret = 0; | |
150 | switch (uflags&3) { | |
151 | default: | |
152 | case O_RDONLY: | |
bd238fb4 | 153 | ret = P9_OREAD; |
6a3124a3 LI |
154 | break; |
155 | ||
156 | case O_WRONLY: | |
bd238fb4 | 157 | ret = P9_OWRITE; |
6a3124a3 LI |
158 | break; |
159 | ||
160 | case O_RDWR: | |
bd238fb4 | 161 | ret = P9_ORDWR; |
6a3124a3 LI |
162 | break; |
163 | } | |
164 | ||
6a3124a3 | 165 | if (uflags & O_TRUNC) |
bd238fb4 | 166 | ret |= P9_OTRUNC; |
6a3124a3 | 167 | |
2e4bef41 EVH |
168 | if (extended) { |
169 | if (uflags & O_EXCL) | |
170 | ret |= P9_OEXCL; | |
171 | ||
172 | if (uflags & O_APPEND) | |
173 | ret |= P9_OAPPEND; | |
174 | } | |
6a3124a3 LI |
175 | |
176 | return ret; | |
177 | } | |
178 | ||
2bad8471 | 179 | /** |
531b1094 | 180 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 181 | * @wstat: structure to initialize |
2bad8471 EVH |
182 | * |
183 | */ | |
184 | ||
7a4439c4 | 185 | void |
bd238fb4 | 186 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 187 | { |
531b1094 LI |
188 | wstat->type = ~0; |
189 | wstat->dev = ~0; | |
190 | wstat->qid.type = ~0; | |
191 | wstat->qid.version = ~0; | |
192 | *((long long *)&wstat->qid.path) = ~0; | |
193 | wstat->mode = ~0; | |
194 | wstat->atime = ~0; | |
195 | wstat->mtime = ~0; | |
196 | wstat->length = ~0; | |
197 | wstat->name = NULL; | |
198 | wstat->uid = NULL; | |
199 | wstat->gid = NULL; | |
200 | wstat->muid = NULL; | |
201 | wstat->n_uid = ~0; | |
202 | wstat->n_gid = ~0; | |
203 | wstat->n_muid = ~0; | |
204 | wstat->extension = NULL; | |
2bad8471 EVH |
205 | } |
206 | ||
60e78d2c AK |
207 | #ifdef CONFIG_9P_FSCACHE |
208 | /** | |
209 | * v9fs_alloc_inode - helper function to allocate an inode | |
210 | * This callback is executed before setting up the inode so that we | |
211 | * can associate a vcookie with each inode. | |
212 | * | |
213 | */ | |
214 | ||
215 | struct inode *v9fs_alloc_inode(struct super_block *sb) | |
216 | { | |
217 | struct v9fs_cookie *vcookie; | |
218 | vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, | |
219 | GFP_KERNEL); | |
220 | if (!vcookie) | |
221 | return NULL; | |
222 | ||
223 | vcookie->fscache = NULL; | |
224 | vcookie->qid = NULL; | |
225 | spin_lock_init(&vcookie->lock); | |
226 | return &vcookie->inode; | |
227 | } | |
228 | ||
229 | /** | |
230 | * v9fs_destroy_inode - destroy an inode | |
231 | * | |
232 | */ | |
233 | ||
234 | void v9fs_destroy_inode(struct inode *inode) | |
235 | { | |
236 | kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); | |
237 | } | |
238 | #endif | |
239 | ||
09d34ee5 EVH |
240 | /** |
241 | * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a | |
242 | * new file system object. This checks the S_ISGID to determine the owning | |
243 | * group of the new file system object. | |
244 | */ | |
245 | ||
246 | static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) | |
247 | { | |
248 | BUG_ON(dir_inode == NULL); | |
249 | ||
250 | if (dir_inode->i_mode & S_ISGID) { | |
251 | /* set_gid bit is set.*/ | |
252 | return dir_inode->i_gid; | |
253 | } | |
254 | return current_fsgid(); | |
255 | } | |
256 | ||
257 | /** | |
258 | * v9fs_dentry_from_dir_inode - helper function to get the dentry from | |
259 | * dir inode. | |
260 | * | |
261 | */ | |
262 | ||
ea137533 | 263 | static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) |
09d34ee5 EVH |
264 | { |
265 | struct dentry *dentry; | |
266 | ||
267 | spin_lock(&dcache_lock); | |
268 | /* Directory should have only one entry. */ | |
269 | BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); | |
270 | dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); | |
271 | spin_unlock(&dcache_lock); | |
272 | return dentry; | |
273 | } | |
274 | ||
2bad8471 EVH |
275 | /** |
276 | * v9fs_get_inode - helper function to setup an inode | |
277 | * @sb: superblock | |
278 | * @mode: mode to setup inode with | |
279 | * | |
280 | */ | |
281 | ||
282 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) | |
283 | { | |
2bb54115 | 284 | int err; |
6a3124a3 | 285 | struct inode *inode; |
b501611a | 286 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
2bad8471 | 287 | |
bd238fb4 | 288 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
2bad8471 EVH |
289 | |
290 | inode = new_inode(sb); | |
2bb54115 AK |
291 | if (!inode) { |
292 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); | |
48559b4c | 293 | return ERR_PTR(-ENOMEM); |
2bb54115 AK |
294 | } |
295 | ||
217f206d | 296 | inode_init_owner(inode, NULL, mode); |
2bb54115 AK |
297 | inode->i_blocks = 0; |
298 | inode->i_rdev = 0; | |
299 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
300 | inode->i_mapping->a_ops = &v9fs_addr_operations; | |
301 | ||
302 | switch (mode & S_IFMT) { | |
303 | case S_IFIFO: | |
304 | case S_IFBLK: | |
305 | case S_IFCHR: | |
306 | case S_IFSOCK: | |
4b43516a MK |
307 | if (v9fs_proto_dotl(v9ses)) { |
308 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
309 | inode->i_fop = &v9fs_file_operations_dotl; | |
310 | } else if (v9fs_proto_dotu(v9ses)) { | |
311 | inode->i_op = &v9fs_file_inode_operations; | |
312 | inode->i_fop = &v9fs_file_operations; | |
313 | } else { | |
bd238fb4 | 314 | P9_DPRINTK(P9_DEBUG_ERROR, |
2bb54115 AK |
315 | "special files without extended mode\n"); |
316 | err = -EINVAL; | |
317 | goto error; | |
2bad8471 | 318 | } |
2bb54115 AK |
319 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
320 | break; | |
321 | case S_IFREG: | |
9b6533c9 SK |
322 | if (v9fs_proto_dotl(v9ses)) { |
323 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
324 | inode->i_fop = &v9fs_file_operations_dotl; | |
325 | } else { | |
326 | inode->i_op = &v9fs_file_inode_operations; | |
327 | inode->i_fop = &v9fs_file_operations; | |
328 | } | |
329 | ||
2bb54115 | 330 | break; |
9b6533c9 | 331 | |
2bb54115 | 332 | case S_IFLNK: |
9b6533c9 SK |
333 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
334 | P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " | |
335 | "legacy protocol.\n"); | |
2bb54115 AK |
336 | err = -EINVAL; |
337 | goto error; | |
338 | } | |
9b6533c9 SK |
339 | |
340 | if (v9fs_proto_dotl(v9ses)) | |
341 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
342 | else | |
343 | inode->i_op = &v9fs_symlink_inode_operations; | |
344 | ||
2bb54115 AK |
345 | break; |
346 | case S_IFDIR: | |
347 | inc_nlink(inode); | |
9b6533c9 SK |
348 | if (v9fs_proto_dotl(v9ses)) |
349 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
350 | else if (v9fs_proto_dotu(v9ses)) | |
351 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
352 | else |
353 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
354 | |
355 | if (v9fs_proto_dotl(v9ses)) | |
356 | inode->i_fop = &v9fs_dir_operations_dotl; | |
357 | else | |
358 | inode->i_fop = &v9fs_dir_operations; | |
359 | ||
2bb54115 AK |
360 | break; |
361 | default: | |
362 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", | |
363 | mode, mode & S_IFMT); | |
364 | err = -EINVAL; | |
365 | goto error; | |
2bad8471 | 366 | } |
2bb54115 | 367 | |
2bad8471 | 368 | return inode; |
2bb54115 AK |
369 | |
370 | error: | |
371 | iput(inode); | |
372 | return ERR_PTR(err); | |
2bad8471 EVH |
373 | } |
374 | ||
bd238fb4 | 375 | /* |
6a3124a3 LI |
376 | static struct v9fs_fid* |
377 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
378 | { | |
379 | int err; | |
736c4b85 | 380 | int nfid; |
6a3124a3 LI |
381 | struct v9fs_fid *ret; |
382 | struct v9fs_fcall *fcall; | |
383 | ||
384 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
385 | if (nfid < 0) { | |
0b8dd177 | 386 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 387 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
388 | } |
389 | ||
6a3124a3 LI |
390 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
391 | &fcall); | |
392 | ||
393 | if (err < 0) { | |
41e5a6ac LI |
394 | if (fcall && fcall->id == RWALK) |
395 | goto clunk_fid; | |
396 | ||
6a3124a3 LI |
397 | PRINT_FCALL_ERROR("walk error", fcall); |
398 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
399 | goto error; | |
0b8dd177 | 400 | } |
6a3124a3 | 401 | |
3cf6429a LI |
402 | kfree(fcall); |
403 | fcall = NULL; | |
6a3124a3 LI |
404 | ret = v9fs_fid_create(v9ses, nfid); |
405 | if (!ret) { | |
406 | err = -ENOMEM; | |
407 | goto clunk_fid; | |
408 | } | |
0b8dd177 | 409 | |
6a3124a3 LI |
410 | err = v9fs_fid_insert(ret, dentry); |
411 | if (err < 0) { | |
412 | v9fs_fid_destroy(ret); | |
413 | goto clunk_fid; | |
0b8dd177 | 414 | } |
2bad8471 | 415 | |
6a3124a3 | 416 | return ret; |
2bad8471 | 417 | |
6a3124a3 LI |
418 | clunk_fid: |
419 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 420 | |
6a3124a3 LI |
421 | error: |
422 | kfree(fcall); | |
423 | return ERR_PTR(err); | |
424 | } | |
bd238fb4 | 425 | */ |
2bad8471 | 426 | |
60e78d2c AK |
427 | |
428 | /** | |
429 | * v9fs_clear_inode - release an inode | |
430 | * @inode: inode to release | |
431 | * | |
432 | */ | |
b57922d9 | 433 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 434 | { |
b57922d9 AV |
435 | truncate_inode_pages(inode->i_mapping, 0); |
436 | end_writeback(inode); | |
60e78d2c AK |
437 | filemap_fdatawrite(inode->i_mapping); |
438 | ||
439 | #ifdef CONFIG_9P_FSCACHE | |
440 | v9fs_cache_inode_put_cookie(inode); | |
441 | #endif | |
442 | } | |
443 | ||
5174fdab | 444 | static struct inode * |
f0853122 | 445 | v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
6a3124a3 LI |
446 | struct super_block *sb) |
447 | { | |
448 | int err, umode; | |
f0853122 | 449 | struct inode *ret = NULL; |
51a87c55 | 450 | struct p9_wstat *st; |
531b1094 | 451 | |
bd238fb4 | 452 | st = p9_client_stat(fid); |
02bc3567 AK |
453 | if (IS_ERR(st)) |
454 | return ERR_CAST(st); | |
2bad8471 | 455 | |
bd238fb4 | 456 | umode = p9mode2unixmode(v9ses, st->mode); |
6a3124a3 LI |
457 | ret = v9fs_get_inode(sb, umode); |
458 | if (IS_ERR(ret)) { | |
459 | err = PTR_ERR(ret); | |
6a3124a3 LI |
460 | goto error; |
461 | } | |
2bad8471 | 462 | |
bd238fb4 LI |
463 | v9fs_stat2inode(st, ret, sb); |
464 | ret->i_ino = v9fs_qid2ino(&st->qid); | |
60e78d2c AK |
465 | |
466 | #ifdef CONFIG_9P_FSCACHE | |
467 | v9fs_vcookie_set_qid(ret, &st->qid); | |
468 | v9fs_cache_inode_get_cookie(ret); | |
469 | #endif | |
02bc3567 | 470 | p9stat_free(st); |
bd238fb4 | 471 | kfree(st); |
6a3124a3 | 472 | return ret; |
6a3124a3 | 473 | error: |
02bc3567 | 474 | p9stat_free(st); |
bd238fb4 | 475 | kfree(st); |
6a3124a3 | 476 | return ERR_PTR(err); |
2bad8471 EVH |
477 | } |
478 | ||
f0853122 SK |
479 | static struct inode * |
480 | v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, | |
481 | struct super_block *sb) | |
482 | { | |
483 | struct inode *ret = NULL; | |
484 | int err; | |
485 | struct p9_stat_dotl *st; | |
486 | ||
487 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); | |
488 | if (IS_ERR(st)) | |
489 | return ERR_CAST(st); | |
490 | ||
491 | ret = v9fs_get_inode(sb, st->st_mode); | |
492 | if (IS_ERR(ret)) { | |
493 | err = PTR_ERR(ret); | |
494 | goto error; | |
495 | } | |
496 | ||
497 | v9fs_stat2inode_dotl(st, ret); | |
498 | ret->i_ino = v9fs_qid2ino(&st->qid); | |
499 | #ifdef CONFIG_9P_FSCACHE | |
500 | v9fs_vcookie_set_qid(ret, &st->qid); | |
501 | v9fs_cache_inode_get_cookie(ret); | |
502 | #endif | |
503 | kfree(st); | |
504 | return ret; | |
505 | error: | |
506 | kfree(st); | |
507 | return ERR_PTR(err); | |
508 | } | |
509 | ||
510 | /** | |
511 | * v9fs_inode_from_fid - Helper routine to populate an inode by | |
512 | * issuing a attribute request | |
513 | * @v9ses: session information | |
514 | * @fid: fid to issue attribute request for | |
515 | * @sb: superblock on which to create inode | |
516 | * | |
517 | */ | |
518 | static inline struct inode * | |
519 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, | |
520 | struct super_block *sb) | |
521 | { | |
522 | if (v9fs_proto_dotl(v9ses)) | |
523 | return v9fs_inode_dotl(v9ses, fid, sb); | |
524 | else | |
525 | return v9fs_inode(v9ses, fid, sb); | |
526 | } | |
527 | ||
2bad8471 EVH |
528 | /** |
529 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
530 | * @dir: directory inode that is being deleted |
531 | * @file: dentry that is being deleted | |
532 | * @rmdir: removing a directory | |
2bad8471 EVH |
533 | * |
534 | */ | |
535 | ||
536 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
537 | { | |
d994f405 | 538 | int retval; |
bd238fb4 | 539 | struct inode *file_inode; |
bd238fb4 | 540 | struct p9_fid *v9fid; |
2bad8471 | 541 | |
bd238fb4 | 542 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, |
2bad8471 EVH |
543 | rmdir); |
544 | ||
545 | file_inode = file->d_inode; | |
c959df9f | 546 | v9fid = v9fs_fid_clone(file); |
ba17674f | 547 | if (IS_ERR(v9fid)) |
da977b2c | 548 | return PTR_ERR(v9fid); |
2bad8471 | 549 | |
d994f405 AK |
550 | retval = p9_client_remove(v9fid); |
551 | if (!retval) | |
552 | drop_nlink(file_inode); | |
553 | return retval; | |
2bad8471 EVH |
554 | } |
555 | ||
6a3124a3 LI |
556 | static int |
557 | v9fs_open_created(struct inode *inode, struct file *file) | |
558 | { | |
559 | return 0; | |
560 | } | |
561 | ||
bd238fb4 | 562 | |
2bad8471 | 563 | /** |
bd238fb4 | 564 | * v9fs_create - Create a file |
ee443996 EVH |
565 | * @v9ses: session information |
566 | * @dir: directory that dentry is being created in | |
bd238fb4 | 567 | * @dentry: dentry that is being created |
0e15597e | 568 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
569 | * @perm: create permissions |
570 | * @mode: open mode | |
2bad8471 EVH |
571 | * |
572 | */ | |
bd238fb4 LI |
573 | static struct p9_fid * |
574 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
575 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 576 | { |
6a3124a3 | 577 | int err; |
bd238fb4 LI |
578 | char *name; |
579 | struct p9_fid *dfid, *ofid, *fid; | |
6a3124a3 | 580 | struct inode *inode; |
6a3124a3 | 581 | |
51a87c55 EVH |
582 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
583 | ||
bd238fb4 LI |
584 | err = 0; |
585 | ofid = NULL; | |
586 | fid = NULL; | |
587 | name = (char *) dentry->d_name.name; | |
6d27e64d | 588 | dfid = v9fs_fid_lookup(dentry->d_parent); |
ba17674f | 589 | if (IS_ERR(dfid)) { |
da977b2c | 590 | err = PTR_ERR(dfid); |
6d27e64d VJ |
591 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
592 | return ERR_PTR(err); | |
da977b2c | 593 | } |
6a3124a3 | 594 | |
bd238fb4 LI |
595 | /* clone a fid to use for creation */ |
596 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
597 | if (IS_ERR(ofid)) { | |
598 | err = PTR_ERR(ofid); | |
51a87c55 | 599 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6d27e64d | 600 | return ERR_PTR(err); |
bd238fb4 | 601 | } |
6a3124a3 | 602 | |
bd238fb4 | 603 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 EVH |
604 | if (err < 0) { |
605 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); | |
bd238fb4 | 606 | goto error; |
51a87c55 | 607 | } |
6a3124a3 | 608 | |
bd238fb4 | 609 | /* now walk from the parent so we can get unopened fid */ |
6d27e64d | 610 | fid = p9_client_walk(dfid, 1, &name, 1); |
bd238fb4 LI |
611 | if (IS_ERR(fid)) { |
612 | err = PTR_ERR(fid); | |
51a87c55 | 613 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
bd238fb4 | 614 | fid = NULL; |
6a3124a3 | 615 | goto error; |
6d27e64d | 616 | } |
6a3124a3 | 617 | |
bd238fb4 LI |
618 | /* instantiate inode and assign the unopened fid to the dentry */ |
619 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
6a3124a3 LI |
620 | if (IS_ERR(inode)) { |
621 | err = PTR_ERR(inode); | |
51a87c55 | 622 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
6a3124a3 LI |
623 | goto error; |
624 | } | |
625 | ||
ba17674f | 626 | if (v9ses->cache) |
e03abc0c EVH |
627 | dentry->d_op = &v9fs_cached_dentry_operations; |
628 | else | |
629 | dentry->d_op = &v9fs_dentry_operations; | |
bd238fb4 | 630 | |
6a3124a3 | 631 | d_instantiate(dentry, inode); |
50fb6d2b AK |
632 | err = v9fs_fid_add(dentry, fid); |
633 | if (err < 0) | |
634 | goto error; | |
635 | ||
bd238fb4 | 636 | return ofid; |
6a3124a3 | 637 | |
bd238fb4 | 638 | error: |
bd238fb4 LI |
639 | if (ofid) |
640 | p9_client_clunk(ofid); | |
641 | ||
642 | if (fid) | |
643 | p9_client_clunk(fid); | |
644 | ||
645 | return ERR_PTR(err); | |
646 | } | |
647 | ||
5643135a VJJ |
648 | /** |
649 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. | |
650 | * @dir: directory inode that is being created | |
651 | * @dentry: dentry that is being deleted | |
652 | * @mode: create permissions | |
653 | * @nd: path information | |
654 | * | |
655 | */ | |
656 | ||
657 | static int | |
658 | v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, | |
659 | struct nameidata *nd) | |
660 | { | |
661 | int err = 0; | |
662 | char *name = NULL; | |
663 | gid_t gid; | |
664 | int flags; | |
665 | struct v9fs_session_info *v9ses; | |
666 | struct p9_fid *fid = NULL; | |
667 | struct p9_fid *dfid, *ofid; | |
668 | struct file *filp; | |
669 | struct p9_qid qid; | |
670 | struct inode *inode; | |
671 | ||
672 | v9ses = v9fs_inode2v9ses(dir); | |
673 | if (nd && nd->flags & LOOKUP_OPEN) | |
674 | flags = nd->intent.open.flags - 1; | |
675 | else | |
676 | flags = O_RDWR; | |
677 | ||
678 | name = (char *) dentry->d_name.name; | |
679 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " | |
680 | "mode:0x%x\n", name, flags, mode); | |
681 | ||
682 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
683 | if (IS_ERR(dfid)) { | |
684 | err = PTR_ERR(dfid); | |
685 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
686 | return err; | |
687 | } | |
688 | ||
689 | /* clone a fid to use for creation */ | |
690 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
691 | if (IS_ERR(ofid)) { | |
692 | err = PTR_ERR(ofid); | |
693 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); | |
694 | return err; | |
695 | } | |
696 | ||
697 | gid = v9fs_get_fsgid_for_create(dir); | |
698 | err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); | |
699 | if (err < 0) { | |
700 | P9_DPRINTK(P9_DEBUG_VFS, | |
701 | "p9_client_open_dotl failed in creat %d\n", | |
702 | err); | |
703 | goto error; | |
704 | } | |
705 | ||
706 | /* No need to populate the inode if we are not opening the file AND | |
707 | * not in cached mode. | |
708 | */ | |
709 | if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) { | |
710 | /* Not in cached mode. No need to populate inode with stat */ | |
711 | dentry->d_op = &v9fs_dentry_operations; | |
712 | p9_client_clunk(ofid); | |
713 | d_instantiate(dentry, NULL); | |
714 | return 0; | |
715 | } | |
716 | ||
717 | /* Now walk from the parent so we can get an unopened fid. */ | |
718 | fid = p9_client_walk(dfid, 1, &name, 1); | |
719 | if (IS_ERR(fid)) { | |
720 | err = PTR_ERR(fid); | |
721 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); | |
722 | fid = NULL; | |
723 | goto error; | |
724 | } | |
725 | ||
726 | /* instantiate inode and assign the unopened fid to dentry */ | |
727 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
728 | if (IS_ERR(inode)) { | |
729 | err = PTR_ERR(inode); | |
730 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); | |
731 | goto error; | |
732 | } | |
733 | dentry->d_op = &v9fs_cached_dentry_operations; | |
734 | d_instantiate(dentry, inode); | |
735 | err = v9fs_fid_add(dentry, fid); | |
736 | if (err < 0) | |
737 | goto error; | |
738 | ||
739 | /* if we are opening a file, assign the open fid to the file */ | |
740 | if (nd && nd->flags & LOOKUP_OPEN) { | |
741 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); | |
742 | if (IS_ERR(filp)) { | |
743 | p9_client_clunk(ofid); | |
744 | return PTR_ERR(filp); | |
745 | } | |
746 | filp->private_data = ofid; | |
747 | } else | |
748 | p9_client_clunk(ofid); | |
749 | ||
750 | return 0; | |
751 | ||
752 | error: | |
753 | if (ofid) | |
754 | p9_client_clunk(ofid); | |
755 | if (fid) | |
756 | p9_client_clunk(fid); | |
757 | return err; | |
758 | } | |
759 | ||
bd238fb4 LI |
760 | /** |
761 | * v9fs_vfs_create - VFS hook to create files | |
ee443996 | 762 | * @dir: directory inode that is being created |
bd238fb4 LI |
763 | * @dentry: dentry that is being deleted |
764 | * @mode: create permissions | |
765 | * @nd: path information | |
766 | * | |
767 | */ | |
6a3124a3 | 768 | |
bd238fb4 LI |
769 | static int |
770 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, | |
771 | struct nameidata *nd) | |
772 | { | |
773 | int err; | |
774 | u32 perm; | |
775 | int flags; | |
776 | struct v9fs_session_info *v9ses; | |
777 | struct p9_fid *fid; | |
778 | struct file *filp; | |
779 | ||
780 | err = 0; | |
781 | fid = NULL; | |
782 | v9ses = v9fs_inode2v9ses(dir); | |
783 | perm = unixmode2p9mode(v9ses, mode); | |
784 | if (nd && nd->flags & LOOKUP_OPEN) | |
785 | flags = nd->intent.open.flags - 1; | |
786 | else | |
787 | flags = O_RDWR; | |
788 | ||
789 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
dd6102fb SK |
790 | v9fs_uflags2omode(flags, |
791 | v9fs_proto_dotu(v9ses))); | |
bd238fb4 LI |
792 | if (IS_ERR(fid)) { |
793 | err = PTR_ERR(fid); | |
794 | fid = NULL; | |
795 | goto error; | |
796 | } | |
797 | ||
798 | /* if we are opening a file, assign the open fid to the file */ | |
799 | if (nd && nd->flags & LOOKUP_OPEN) { | |
6a3124a3 LI |
800 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
801 | if (IS_ERR(filp)) { | |
bd238fb4 LI |
802 | err = PTR_ERR(filp); |
803 | goto error; | |
6a3124a3 LI |
804 | } |
805 | ||
bd238fb4 LI |
806 | filp->private_data = fid; |
807 | } else | |
808 | p9_client_clunk(fid); | |
6a3124a3 LI |
809 | |
810 | return 0; | |
811 | ||
812 | error: | |
bd238fb4 LI |
813 | if (fid) |
814 | p9_client_clunk(fid); | |
6a3124a3 | 815 | |
6a3124a3 | 816 | return err; |
2bad8471 EVH |
817 | } |
818 | ||
819 | /** | |
820 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 821 | * @dir: inode that is being unlinked |
2bad8471 EVH |
822 | * @dentry: dentry that is being unlinked |
823 | * @mode: mode for new directory | |
824 | * | |
825 | */ | |
826 | ||
6a3124a3 | 827 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
2bad8471 | 828 | { |
6a3124a3 | 829 | int err; |
bd238fb4 | 830 | u32 perm; |
6a3124a3 | 831 | struct v9fs_session_info *v9ses; |
bd238fb4 | 832 | struct p9_fid *fid; |
6a3124a3 | 833 | |
bd238fb4 LI |
834 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
835 | err = 0; | |
6a3124a3 | 836 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 837 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
838 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
839 | if (IS_ERR(fid)) { | |
840 | err = PTR_ERR(fid); | |
841 | fid = NULL; | |
6a3124a3 LI |
842 | } |
843 | ||
bd238fb4 LI |
844 | if (fid) |
845 | p9_client_clunk(fid); | |
6a3124a3 | 846 | |
6a3124a3 | 847 | return err; |
2bad8471 EVH |
848 | } |
849 | ||
01a622bd MK |
850 | |
851 | /** | |
852 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory | |
853 | * @dir: inode that is being unlinked | |
854 | * @dentry: dentry that is being unlinked | |
855 | * @mode: mode for new directory | |
856 | * | |
857 | */ | |
858 | ||
859 | static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, | |
860 | int mode) | |
861 | { | |
862 | int err; | |
863 | struct v9fs_session_info *v9ses; | |
864 | struct p9_fid *fid = NULL, *dfid = NULL; | |
865 | gid_t gid; | |
866 | char *name; | |
867 | struct inode *inode; | |
868 | struct p9_qid qid; | |
869 | struct dentry *dir_dentry; | |
870 | ||
871 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); | |
872 | err = 0; | |
873 | v9ses = v9fs_inode2v9ses(dir); | |
874 | ||
875 | mode |= S_IFDIR; | |
876 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
877 | dfid = v9fs_fid_lookup(dir_dentry); | |
878 | if (IS_ERR(dfid)) { | |
879 | err = PTR_ERR(dfid); | |
880 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
881 | dfid = NULL; | |
882 | goto error; | |
883 | } | |
884 | ||
885 | gid = v9fs_get_fsgid_for_create(dir); | |
886 | if (gid < 0) { | |
887 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); | |
888 | goto error; | |
889 | } | |
890 | ||
891 | name = (char *) dentry->d_name.name; | |
892 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); | |
893 | if (err < 0) | |
894 | goto error; | |
895 | ||
896 | /* instantiate inode and assign the unopened fid to the dentry */ | |
897 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
898 | fid = p9_client_walk(dfid, 1, &name, 1); | |
899 | if (IS_ERR(fid)) { | |
900 | err = PTR_ERR(fid); | |
901 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
902 | err); | |
903 | fid = NULL; | |
904 | goto error; | |
905 | } | |
906 | ||
907 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
908 | if (IS_ERR(inode)) { | |
909 | err = PTR_ERR(inode); | |
910 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
911 | err); | |
912 | goto error; | |
913 | } | |
914 | dentry->d_op = &v9fs_cached_dentry_operations; | |
915 | d_instantiate(dentry, inode); | |
916 | err = v9fs_fid_add(dentry, fid); | |
917 | if (err < 0) | |
918 | goto error; | |
919 | fid = NULL; | |
920 | } | |
921 | error: | |
922 | if (fid) | |
923 | p9_client_clunk(fid); | |
924 | return err; | |
925 | } | |
926 | ||
2bad8471 EVH |
927 | /** |
928 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
929 | * @dir: inode that is being walked from | |
930 | * @dentry: dentry that is being walked to? | |
931 | * @nameidata: path data | |
932 | * | |
933 | */ | |
934 | ||
935 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
936 | struct nameidata *nameidata) | |
937 | { | |
938 | struct super_block *sb; | |
939 | struct v9fs_session_info *v9ses; | |
bd238fb4 | 940 | struct p9_fid *dfid, *fid; |
2bad8471 | 941 | struct inode *inode; |
bd238fb4 | 942 | char *name; |
2bad8471 EVH |
943 | int result = 0; |
944 | ||
bd238fb4 | 945 | P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", |
731805b4 | 946 | dir, dentry->d_name.name, dentry, nameidata); |
2bad8471 | 947 | |
11e9b49b SK |
948 | if (dentry->d_name.len > NAME_MAX) |
949 | return ERR_PTR(-ENAMETOOLONG); | |
950 | ||
2bad8471 EVH |
951 | sb = dir->i_sb; |
952 | v9ses = v9fs_inode2v9ses(dir); | |
a534c8d1 | 953 | /* We can walk d_parent because we hold the dir->i_mutex */ |
bd238fb4 LI |
954 | dfid = v9fs_fid_lookup(dentry->d_parent); |
955 | if (IS_ERR(dfid)) | |
e231c2ee | 956 | return ERR_CAST(dfid); |
bd238fb4 LI |
957 | |
958 | name = (char *) dentry->d_name.name; | |
959 | fid = p9_client_walk(dfid, 1, &name, 1); | |
960 | if (IS_ERR(fid)) { | |
961 | result = PTR_ERR(fid); | |
2bad8471 | 962 | if (result == -ENOENT) { |
85e0df24 AK |
963 | inode = NULL; |
964 | goto inst_out; | |
2bad8471 | 965 | } |
2bad8471 | 966 | |
bd238fb4 | 967 | return ERR_PTR(result); |
2bad8471 EVH |
968 | } |
969 | ||
bd238fb4 LI |
970 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
971 | if (IS_ERR(inode)) { | |
972 | result = PTR_ERR(inode); | |
973 | inode = NULL; | |
974 | goto error; | |
2bad8471 EVH |
975 | } |
976 | ||
bd238fb4 | 977 | result = v9fs_fid_add(dentry, fid); |
6a3124a3 | 978 | if (result < 0) |
bd238fb4 | 979 | goto error; |
6a3124a3 | 980 | |
85e0df24 AK |
981 | inst_out: |
982 | if (v9ses->cache) | |
e03abc0c EVH |
983 | dentry->d_op = &v9fs_cached_dentry_operations; |
984 | else | |
985 | dentry->d_op = &v9fs_dentry_operations; | |
2bad8471 EVH |
986 | |
987 | d_add(dentry, inode); | |
2bad8471 EVH |
988 | return NULL; |
989 | ||
bd238fb4 | 990 | error: |
62aa528e | 991 | p9_client_clunk(fid); |
da977b2c | 992 | |
2bad8471 EVH |
993 | return ERR_PTR(result); |
994 | } | |
995 | ||
996 | /** | |
997 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
998 | * @i: inode that is being unlinked | |
73c592b9 | 999 | * @d: dentry that is being unlinked |
2bad8471 EVH |
1000 | * |
1001 | */ | |
1002 | ||
1003 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
1004 | { | |
1005 | return v9fs_remove(i, d, 0); | |
1006 | } | |
1007 | ||
1008 | /** | |
1009 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
1010 | * @i: inode that is being unlinked | |
73c592b9 | 1011 | * @d: dentry that is being unlinked |
2bad8471 EVH |
1012 | * |
1013 | */ | |
1014 | ||
1015 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
1016 | { | |
1017 | return v9fs_remove(i, d, 1); | |
1018 | } | |
1019 | ||
1020 | /** | |
1021 | * v9fs_vfs_rename - VFS hook to rename an inode | |
1022 | * @old_dir: old dir inode | |
1023 | * @old_dentry: old dentry | |
1024 | * @new_dir: new dir inode | |
1025 | * @new_dentry: new dentry | |
1026 | * | |
1027 | */ | |
1028 | ||
1029 | static int | |
1030 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1031 | struct inode *new_dir, struct dentry *new_dentry) | |
1032 | { | |
bd238fb4 LI |
1033 | struct inode *old_inode; |
1034 | struct v9fs_session_info *v9ses; | |
1035 | struct p9_fid *oldfid; | |
1036 | struct p9_fid *olddirfid; | |
1037 | struct p9_fid *newdirfid; | |
1038 | struct p9_wstat wstat; | |
1039 | int retval; | |
2bad8471 | 1040 | |
bd238fb4 LI |
1041 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
1042 | retval = 0; | |
1043 | old_inode = old_dentry->d_inode; | |
1044 | v9ses = v9fs_inode2v9ses(old_inode); | |
1045 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 1046 | if (IS_ERR(oldfid)) |
da977b2c EVH |
1047 | return PTR_ERR(oldfid); |
1048 | ||
1049 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); | |
ba17674f | 1050 | if (IS_ERR(olddirfid)) { |
da977b2c | 1051 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 1052 | goto done; |
da977b2c EVH |
1053 | } |
1054 | ||
1055 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); | |
ba17674f | 1056 | if (IS_ERR(newdirfid)) { |
da977b2c | 1057 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 1058 | goto clunk_olddir; |
2bad8471 EVH |
1059 | } |
1060 | ||
a534c8d1 | 1061 | down_write(&v9ses->rename_sem); |
4681dbda SK |
1062 | if (v9fs_proto_dotl(v9ses)) { |
1063 | retval = p9_client_rename(oldfid, newdirfid, | |
1064 | (char *) new_dentry->d_name.name); | |
1065 | if (retval != -ENOSYS) | |
1066 | goto clunk_newdir; | |
1067 | } | |
a534c8d1 AK |
1068 | if (old_dentry->d_parent != new_dentry->d_parent) { |
1069 | /* | |
1070 | * 9P .u can only handle file rename in the same directory | |
1071 | */ | |
4681dbda | 1072 | |
bd238fb4 LI |
1073 | P9_DPRINTK(P9_DEBUG_ERROR, |
1074 | "old dir and new dir are different\n"); | |
621997cd | 1075 | retval = -EXDEV; |
bd238fb4 | 1076 | goto clunk_newdir; |
2bad8471 | 1077 | } |
531b1094 | 1078 | v9fs_blank_wstat(&wstat); |
ba17674f | 1079 | wstat.muid = v9ses->uname; |
531b1094 | 1080 | wstat.name = (char *) new_dentry->d_name.name; |
bd238fb4 | 1081 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 1082 | |
bd238fb4 | 1083 | clunk_newdir: |
a534c8d1 AK |
1084 | if (!retval) |
1085 | /* successful rename */ | |
1086 | d_move(old_dentry, new_dentry); | |
1087 | up_write(&v9ses->rename_sem); | |
22150c4f | 1088 | p9_client_clunk(newdirfid); |
2bad8471 | 1089 | |
bd238fb4 | 1090 | clunk_olddir: |
22150c4f | 1091 | p9_client_clunk(olddirfid); |
da977b2c | 1092 | |
bd238fb4 | 1093 | done: |
2bad8471 EVH |
1094 | return retval; |
1095 | } | |
1096 | ||
1097 | /** | |
943ffb58 | 1098 | * v9fs_vfs_getattr - retrieve file metadata |
ee443996 EVH |
1099 | * @mnt: mount information |
1100 | * @dentry: file to get attributes on | |
1101 | * @stat: metadata structure to populate | |
2bad8471 EVH |
1102 | * |
1103 | */ | |
1104 | ||
1105 | static int | |
1106 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1107 | struct kstat *stat) | |
1108 | { | |
bd238fb4 LI |
1109 | int err; |
1110 | struct v9fs_session_info *v9ses; | |
1111 | struct p9_fid *fid; | |
51a87c55 | 1112 | struct p9_wstat *st; |
bd238fb4 LI |
1113 | |
1114 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
1115 | err = -EPERM; | |
1116 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
60e78d2c | 1117 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
9523a841 EVH |
1118 | return simple_getattr(mnt, dentry, stat); |
1119 | ||
bd238fb4 LI |
1120 | fid = v9fs_fid_lookup(dentry); |
1121 | if (IS_ERR(fid)) | |
da977b2c | 1122 | return PTR_ERR(fid); |
2bad8471 | 1123 | |
bd238fb4 LI |
1124 | st = p9_client_stat(fid); |
1125 | if (IS_ERR(st)) | |
1126 | return PTR_ERR(st); | |
2bad8471 | 1127 | |
bd238fb4 | 1128 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
2bad8471 | 1129 | generic_fillattr(dentry->d_inode, stat); |
2bad8471 | 1130 | |
bd238fb4 LI |
1131 | kfree(st); |
1132 | return 0; | |
2bad8471 EVH |
1133 | } |
1134 | ||
f0853122 SK |
1135 | static int |
1136 | v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, | |
1137 | struct kstat *stat) | |
1138 | { | |
1139 | int err; | |
1140 | struct v9fs_session_info *v9ses; | |
1141 | struct p9_fid *fid; | |
1142 | struct p9_stat_dotl *st; | |
1143 | ||
1144 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
1145 | err = -EPERM; | |
1146 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1147 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) | |
1148 | return simple_getattr(mnt, dentry, stat); | |
1149 | ||
1150 | fid = v9fs_fid_lookup(dentry); | |
1151 | if (IS_ERR(fid)) | |
1152 | return PTR_ERR(fid); | |
1153 | ||
1154 | /* Ask for all the fields in stat structure. Server will return | |
1155 | * whatever it supports | |
1156 | */ | |
1157 | ||
1158 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
1159 | if (IS_ERR(st)) | |
1160 | return PTR_ERR(st); | |
1161 | ||
1162 | v9fs_stat2inode_dotl(st, dentry->d_inode); | |
1163 | generic_fillattr(dentry->d_inode, stat); | |
1164 | /* Change block size to what the server returned */ | |
1165 | stat->blksize = st->st_blksize; | |
1166 | ||
1167 | kfree(st); | |
1168 | return 0; | |
1169 | } | |
1170 | ||
2bad8471 EVH |
1171 | /** |
1172 | * v9fs_vfs_setattr - set file metadata | |
1173 | * @dentry: file whose metadata to set | |
1174 | * @iattr: metadata assignment structure | |
1175 | * | |
1176 | */ | |
1177 | ||
1178 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
1179 | { | |
bd238fb4 LI |
1180 | int retval; |
1181 | struct v9fs_session_info *v9ses; | |
1182 | struct p9_fid *fid; | |
1183 | struct p9_wstat wstat; | |
2bad8471 | 1184 | |
bd238fb4 LI |
1185 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
1186 | retval = -EPERM; | |
1187 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1188 | fid = v9fs_fid_lookup(dentry); | |
da977b2c EVH |
1189 | if(IS_ERR(fid)) |
1190 | return PTR_ERR(fid); | |
2bad8471 | 1191 | |
531b1094 | 1192 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1193 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1194 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1195 | |
1196 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1197 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1198 | |
1199 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1200 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1201 | |
1202 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1203 | wstat.length = iattr->ia_size; |
2bad8471 | 1204 | |
dd6102fb | 1205 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1206 | if (iattr->ia_valid & ATTR_UID) |
1207 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1208 | |
531b1094 LI |
1209 | if (iattr->ia_valid & ATTR_GID) |
1210 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
1211 | } |
1212 | ||
bd238fb4 | 1213 | retval = p9_client_wstat(fid, &wstat); |
1025774c CH |
1214 | if (retval < 0) |
1215 | return retval; | |
2bad8471 | 1216 | |
1025774c CH |
1217 | if ((iattr->ia_valid & ATTR_SIZE) && |
1218 | iattr->ia_size != i_size_read(dentry->d_inode)) { | |
1219 | retval = vmtruncate(dentry->d_inode, iattr->ia_size); | |
1220 | if (retval) | |
1221 | return retval; | |
1222 | } | |
2bad8471 | 1223 | |
1025774c CH |
1224 | setattr_copy(dentry->d_inode, iattr); |
1225 | mark_inode_dirty(dentry->d_inode); | |
1226 | return 0; | |
2bad8471 EVH |
1227 | } |
1228 | ||
87d7845a SK |
1229 | /** |
1230 | * v9fs_vfs_setattr_dotl - set file metadata | |
1231 | * @dentry: file whose metadata to set | |
1232 | * @iattr: metadata assignment structure | |
1233 | * | |
1234 | */ | |
1235 | ||
1236 | static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) | |
1237 | { | |
1238 | int retval; | |
1239 | struct v9fs_session_info *v9ses; | |
1240 | struct p9_fid *fid; | |
1241 | struct p9_iattr_dotl p9attr; | |
1242 | ||
1243 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); | |
1244 | ||
1245 | retval = inode_change_ok(dentry->d_inode, iattr); | |
1246 | if (retval) | |
1247 | return retval; | |
1248 | ||
1249 | p9attr.valid = iattr->ia_valid; | |
1250 | p9attr.mode = iattr->ia_mode; | |
1251 | p9attr.uid = iattr->ia_uid; | |
1252 | p9attr.gid = iattr->ia_gid; | |
1253 | p9attr.size = iattr->ia_size; | |
1254 | p9attr.atime_sec = iattr->ia_atime.tv_sec; | |
1255 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; | |
1256 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; | |
1257 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; | |
1258 | ||
1259 | retval = -EPERM; | |
1260 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1261 | fid = v9fs_fid_lookup(dentry); | |
1262 | if (IS_ERR(fid)) | |
1263 | return PTR_ERR(fid); | |
1264 | ||
1265 | retval = p9_client_setattr(fid, &p9attr); | |
8cef9c67 SR |
1266 | if (retval < 0) |
1267 | return retval; | |
87d7845a | 1268 | |
8cef9c67 SR |
1269 | if ((iattr->ia_valid & ATTR_SIZE) && |
1270 | iattr->ia_size != i_size_read(dentry->d_inode)) { | |
1271 | retval = vmtruncate(dentry->d_inode, iattr->ia_size); | |
1272 | if (retval) | |
1273 | return retval; | |
1274 | } | |
1275 | ||
1276 | setattr_copy(dentry->d_inode, iattr); | |
1277 | mark_inode_dirty(dentry->d_inode); | |
1278 | return 0; | |
87d7845a SK |
1279 | } |
1280 | ||
2bad8471 | 1281 | /** |
531b1094 LI |
1282 | * v9fs_stat2inode - populate an inode structure with mistat info |
1283 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1284 | * @inode: inode to populate |
1285 | * @sb: superblock of filesystem | |
1286 | * | |
1287 | */ | |
1288 | ||
1289 | void | |
51a87c55 | 1290 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
531b1094 | 1291 | struct super_block *sb) |
2bad8471 | 1292 | { |
531b1094 | 1293 | char ext[32]; |
5717144a AK |
1294 | char tag_name[14]; |
1295 | unsigned int i_nlink; | |
2bad8471 EVH |
1296 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
1297 | ||
1298 | inode->i_nlink = 1; | |
1299 | ||
531b1094 LI |
1300 | inode->i_atime.tv_sec = stat->atime; |
1301 | inode->i_mtime.tv_sec = stat->mtime; | |
1302 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1303 | |
bd32b82d LI |
1304 | inode->i_uid = v9ses->dfltuid; |
1305 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1306 | |
dd6102fb | 1307 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1308 | inode->i_uid = stat->n_uid; |
1309 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1310 | } |
5717144a AK |
1311 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
1312 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { | |
1313 | /* | |
1314 | * Hadlink support got added later to | |
1315 | * to the .u extension. So there can be | |
1316 | * server out there that doesn't support | |
1317 | * this even with .u extension. So check | |
1318 | * for non NULL stat->extension | |
1319 | */ | |
1320 | strncpy(ext, stat->extension, sizeof(ext)); | |
1321 | /* HARDLINKCOUNT %u */ | |
1322 | sscanf(ext, "%13s %u", tag_name, &i_nlink); | |
1323 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) | |
1324 | inode->i_nlink = i_nlink; | |
1325 | } | |
1326 | } | |
531b1094 | 1327 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
1328 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
1329 | char type = 0; | |
1330 | int major = -1; | |
1331 | int minor = -1; | |
531b1094 | 1332 | |
51a87c55 | 1333 | strncpy(ext, stat->extension, sizeof(ext)); |
531b1094 | 1334 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
2bad8471 EVH |
1335 | switch (type) { |
1336 | case 'c': | |
1337 | inode->i_mode &= ~S_IFBLK; | |
1338 | inode->i_mode |= S_IFCHR; | |
1339 | break; | |
1340 | case 'b': | |
1341 | break; | |
1342 | default: | |
bd238fb4 | 1343 | P9_DPRINTK(P9_DEBUG_ERROR, |
51a87c55 EVH |
1344 | "Unknown special type %c %s\n", type, |
1345 | stat->extension); | |
2bad8471 EVH |
1346 | }; |
1347 | inode->i_rdev = MKDEV(major, minor); | |
57c7b4e6 | 1348 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
2bad8471 EVH |
1349 | } else |
1350 | inode->i_rdev = 0; | |
1351 | ||
7549ae3e | 1352 | i_size_write(inode, stat->length); |
2bad8471 | 1353 | |
bd238fb4 | 1354 | /* not real number of blocks, but 512 byte ones ... */ |
7549ae3e | 1355 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
2bad8471 EVH |
1356 | } |
1357 | ||
f0853122 SK |
1358 | /** |
1359 | * v9fs_stat2inode_dotl - populate an inode structure with stat info | |
1360 | * @stat: stat structure | |
1361 | * @inode: inode to populate | |
1362 | * @sb: superblock of filesystem | |
1363 | * | |
1364 | */ | |
1365 | ||
1366 | void | |
1367 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) | |
1368 | { | |
1369 | ||
1370 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { | |
1371 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
1372 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
1373 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
1374 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
1375 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
1376 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
1377 | inode->i_uid = stat->st_uid; | |
1378 | inode->i_gid = stat->st_gid; | |
1379 | inode->i_nlink = stat->st_nlink; | |
1380 | inode->i_mode = stat->st_mode; | |
1381 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
1382 | ||
1383 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) | |
1384 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1385 | ||
1386 | i_size_write(inode, stat->st_size); | |
1387 | inode->i_blocks = stat->st_blocks; | |
1388 | } else { | |
1389 | if (stat->st_result_mask & P9_STATS_ATIME) { | |
1390 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
1391 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
1392 | } | |
1393 | if (stat->st_result_mask & P9_STATS_MTIME) { | |
1394 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
1395 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
1396 | } | |
1397 | if (stat->st_result_mask & P9_STATS_CTIME) { | |
1398 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
1399 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
1400 | } | |
1401 | if (stat->st_result_mask & P9_STATS_UID) | |
1402 | inode->i_uid = stat->st_uid; | |
1403 | if (stat->st_result_mask & P9_STATS_GID) | |
1404 | inode->i_gid = stat->st_gid; | |
1405 | if (stat->st_result_mask & P9_STATS_NLINK) | |
1406 | inode->i_nlink = stat->st_nlink; | |
1407 | if (stat->st_result_mask & P9_STATS_MODE) { | |
1408 | inode->i_mode = stat->st_mode; | |
1409 | if ((S_ISBLK(inode->i_mode)) || | |
1410 | (S_ISCHR(inode->i_mode))) | |
1411 | init_special_inode(inode, inode->i_mode, | |
1412 | inode->i_rdev); | |
1413 | } | |
1414 | if (stat->st_result_mask & P9_STATS_RDEV) | |
1415 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
1416 | if (stat->st_result_mask & P9_STATS_SIZE) | |
1417 | i_size_write(inode, stat->st_size); | |
1418 | if (stat->st_result_mask & P9_STATS_BLOCKS) | |
1419 | inode->i_blocks = stat->st_blocks; | |
1420 | } | |
1421 | if (stat->st_result_mask & P9_STATS_GEN) | |
1422 | inode->i_generation = stat->st_gen; | |
1423 | ||
1424 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION | |
1425 | * because the inode structure does not have fields for them. | |
1426 | */ | |
1427 | } | |
1428 | ||
2bad8471 EVH |
1429 | /** |
1430 | * v9fs_qid2ino - convert qid into inode number | |
1431 | * @qid: qid to hash | |
1432 | * | |
1433 | * BUG: potential for inode number collisions? | |
1434 | */ | |
1435 | ||
bd238fb4 | 1436 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1437 | { |
1438 | u64 path = qid->path + 2; | |
1439 | ino_t i = 0; | |
1440 | ||
1441 | if (sizeof(ino_t) == sizeof(path)) | |
1442 | memcpy(&i, &path, sizeof(ino_t)); | |
1443 | else | |
1444 | i = (ino_t) (path ^ (path >> 32)); | |
1445 | ||
1446 | return i; | |
1447 | } | |
1448 | ||
2bad8471 EVH |
1449 | /** |
1450 | * v9fs_readlink - read a symlink's location (internal version) | |
1451 | * @dentry: dentry for symlink | |
73c592b9 | 1452 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
1453 | * @buflen: length of buffer |
1454 | * | |
1455 | */ | |
1456 | ||
1457 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
1458 | { | |
bd238fb4 | 1459 | int retval; |
2bad8471 | 1460 | |
bd238fb4 LI |
1461 | struct v9fs_session_info *v9ses; |
1462 | struct p9_fid *fid; | |
51a87c55 | 1463 | struct p9_wstat *st; |
2bad8471 | 1464 | |
bd238fb4 LI |
1465 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
1466 | retval = -EPERM; | |
1467 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1468 | fid = v9fs_fid_lookup(dentry); | |
ba17674f | 1469 | if (IS_ERR(fid)) |
da977b2c | 1470 | return PTR_ERR(fid); |
2bad8471 | 1471 | |
50cc42ff | 1472 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) |
bd238fb4 | 1473 | return -EBADF; |
2bad8471 | 1474 | |
bd238fb4 LI |
1475 | st = p9_client_stat(fid); |
1476 | if (IS_ERR(st)) | |
1477 | return PTR_ERR(st); | |
2bad8471 | 1478 | |
bd238fb4 | 1479 | if (!(st->mode & P9_DMSYMLINK)) { |
2bad8471 | 1480 | retval = -EINVAL; |
bd238fb4 | 1481 | goto done; |
2bad8471 EVH |
1482 | } |
1483 | ||
1484 | /* copy extension buffer into buffer */ | |
51a87c55 | 1485 | strncpy(buffer, st->extension, buflen); |
2bad8471 | 1486 | |
bd238fb4 | 1487 | P9_DPRINTK(P9_DEBUG_VFS, |
51a87c55 | 1488 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
2bad8471 | 1489 | |
2511cd0b | 1490 | retval = strnlen(buffer, buflen); |
bd238fb4 LI |
1491 | done: |
1492 | kfree(st); | |
2bad8471 EVH |
1493 | return retval; |
1494 | } | |
1495 | ||
2bad8471 EVH |
1496 | /** |
1497 | * v9fs_vfs_follow_link - follow a symlink path | |
1498 | * @dentry: dentry for symlink | |
1499 | * @nd: nameidata | |
1500 | * | |
1501 | */ | |
1502 | ||
1503 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1504 | { | |
1505 | int len = 0; | |
1506 | char *link = __getname(); | |
1507 | ||
bd238fb4 | 1508 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
2bad8471 EVH |
1509 | |
1510 | if (!link) | |
1511 | link = ERR_PTR(-ENOMEM); | |
1512 | else { | |
16cce6d2 | 1513 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
1514 | |
1515 | if (len < 0) { | |
ce44eeb6 | 1516 | __putname(link); |
2bad8471 EVH |
1517 | link = ERR_PTR(len); |
1518 | } else | |
2511cd0b | 1519 | link[min(len, PATH_MAX-1)] = 0; |
2bad8471 EVH |
1520 | } |
1521 | nd_set_link(nd, link); | |
1522 | ||
1523 | return NULL; | |
1524 | } | |
1525 | ||
1526 | /** | |
1527 | * v9fs_vfs_put_link - release a symlink path | |
1528 | * @dentry: dentry for symlink | |
1529 | * @nd: nameidata | |
ee443996 | 1530 | * @p: unused |
2bad8471 EVH |
1531 | * |
1532 | */ | |
1533 | ||
ee443996 EVH |
1534 | static void |
1535 | v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
2bad8471 EVH |
1536 | { |
1537 | char *s = nd_get_link(nd); | |
1538 | ||
6ff23207 DG |
1539 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
1540 | IS_ERR(s) ? "<error>" : s); | |
2bad8471 | 1541 | if (!IS_ERR(s)) |
ce44eeb6 | 1542 | __putname(s); |
2bad8471 EVH |
1543 | } |
1544 | ||
ee443996 EVH |
1545 | /** |
1546 | * v9fs_vfs_mkspecial - create a special file | |
1547 | * @dir: inode to create special file in | |
1548 | * @dentry: dentry to create | |
1549 | * @mode: mode to create special file | |
1550 | * @extension: 9p2000.u format extension string representing special file | |
1551 | * | |
1552 | */ | |
1553 | ||
531b1094 LI |
1554 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
1555 | int mode, const char *extension) | |
2bad8471 | 1556 | { |
bd238fb4 | 1557 | u32 perm; |
531b1094 | 1558 | struct v9fs_session_info *v9ses; |
bd238fb4 | 1559 | struct p9_fid *fid; |
2bad8471 | 1560 | |
6a3124a3 | 1561 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1562 | if (!v9fs_proto_dotu(v9ses)) { |
bd238fb4 | 1563 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1564 | return -EPERM; |
2bad8471 EVH |
1565 | } |
1566 | ||
da977b2c | 1567 | perm = unixmode2p9mode(v9ses, mode); |
bd238fb4 LI |
1568 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1569 | P9_OREAD); | |
1570 | if (IS_ERR(fid)) | |
1571 | return PTR_ERR(fid); | |
da977b2c | 1572 | |
bd238fb4 | 1573 | p9_client_clunk(fid); |
6a3124a3 | 1574 | return 0; |
531b1094 LI |
1575 | } |
1576 | ||
50cc42ff VJJ |
1577 | /** |
1578 | * v9fs_vfs_symlink_dotl - helper function to create symlinks | |
1579 | * @dir: directory inode containing symlink | |
1580 | * @dentry: dentry for symlink | |
1581 | * @symname: symlink data | |
1582 | * | |
1583 | * See Also: 9P2000.L RFC for more information | |
1584 | * | |
1585 | */ | |
1586 | ||
1587 | static int | |
1588 | v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, | |
1589 | const char *symname) | |
1590 | { | |
1591 | struct v9fs_session_info *v9ses; | |
1592 | struct p9_fid *dfid; | |
1593 | struct p9_fid *fid = NULL; | |
1594 | struct inode *inode; | |
1595 | struct p9_qid qid; | |
1596 | char *name; | |
1597 | int err; | |
1598 | gid_t gid; | |
1599 | ||
1600 | name = (char *) dentry->d_name.name; | |
1601 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", | |
1602 | dir->i_ino, name, symname); | |
1603 | v9ses = v9fs_inode2v9ses(dir); | |
1604 | ||
1605 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
1606 | if (IS_ERR(dfid)) { | |
1607 | err = PTR_ERR(dfid); | |
1608 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
1609 | return err; | |
1610 | } | |
1611 | ||
1612 | gid = v9fs_get_fsgid_for_create(dir); | |
1613 | ||
1614 | if (gid < 0) { | |
1615 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); | |
1616 | goto error; | |
1617 | } | |
1618 | ||
1619 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ | |
1620 | err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); | |
1621 | ||
1622 | if (err < 0) { | |
1623 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); | |
1624 | goto error; | |
1625 | } | |
1626 | ||
1627 | if (v9ses->cache) { | |
1628 | /* Now walk from the parent so we can get an unopened fid. */ | |
1629 | fid = p9_client_walk(dfid, 1, &name, 1); | |
1630 | if (IS_ERR(fid)) { | |
1631 | err = PTR_ERR(fid); | |
1632 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
1633 | err); | |
1634 | fid = NULL; | |
1635 | goto error; | |
1636 | } | |
1637 | ||
1638 | /* instantiate inode and assign the unopened fid to dentry */ | |
1639 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
1640 | if (IS_ERR(inode)) { | |
1641 | err = PTR_ERR(inode); | |
1642 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
1643 | err); | |
1644 | goto error; | |
1645 | } | |
1646 | dentry->d_op = &v9fs_cached_dentry_operations; | |
1647 | d_instantiate(dentry, inode); | |
1648 | err = v9fs_fid_add(dentry, fid); | |
1649 | if (err < 0) | |
1650 | goto error; | |
1651 | fid = NULL; | |
1652 | } else { | |
1653 | /* Not in cached mode. No need to populate inode with stat */ | |
1654 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK); | |
1655 | if (IS_ERR(inode)) { | |
1656 | err = PTR_ERR(inode); | |
1657 | goto error; | |
1658 | } | |
1659 | dentry->d_op = &v9fs_dentry_operations; | |
1660 | d_instantiate(dentry, inode); | |
1661 | } | |
1662 | ||
1663 | error: | |
1664 | if (fid) | |
1665 | p9_client_clunk(fid); | |
1666 | ||
1667 | return err; | |
1668 | } | |
1669 | ||
531b1094 LI |
1670 | /** |
1671 | * v9fs_vfs_symlink - helper function to create symlinks | |
1672 | * @dir: directory inode containing symlink | |
1673 | * @dentry: dentry for symlink | |
1674 | * @symname: symlink data | |
1675 | * | |
ee443996 | 1676 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1677 | * |
1678 | */ | |
1679 | ||
1680 | static int | |
1681 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1682 | { | |
bd238fb4 LI |
1683 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
1684 | dentry->d_name.name, symname); | |
531b1094 LI |
1685 | |
1686 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1687 | } | |
1688 | ||
1689 | /** | |
1690 | * v9fs_vfs_link - create a hardlink | |
1691 | * @old_dentry: dentry for file to link to | |
1692 | * @dir: inode destination for new link | |
1693 | * @dentry: dentry for link | |
1694 | * | |
1695 | */ | |
1696 | ||
531b1094 LI |
1697 | static int |
1698 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1699 | struct dentry *dentry) | |
1700 | { | |
1701 | int retval; | |
bd238fb4 | 1702 | struct p9_fid *oldfid; |
531b1094 LI |
1703 | char *name; |
1704 | ||
bd238fb4 LI |
1705 | P9_DPRINTK(P9_DEBUG_VFS, |
1706 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
531b1094 LI |
1707 | old_dentry->d_name.name); |
1708 | ||
da977b2c | 1709 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1710 | if (IS_ERR(oldfid)) |
da977b2c | 1711 | return PTR_ERR(oldfid); |
531b1094 LI |
1712 | |
1713 | name = __getname(); | |
da977b2c EVH |
1714 | if (unlikely(!name)) { |
1715 | retval = -ENOMEM; | |
1716 | goto clunk_fid; | |
1717 | } | |
0710d36a | 1718 | |
16cce6d2 | 1719 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1720 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
531b1094 | 1721 | __putname(name); |
2bad8471 | 1722 | |
da977b2c | 1723 | clunk_fid: |
bd238fb4 | 1724 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1725 | return retval; |
1726 | } | |
1727 | ||
09d34ee5 EVH |
1728 | /** |
1729 | * v9fs_vfs_link_dotl - create a hardlink for dotl | |
1730 | * @old_dentry: dentry for file to link to | |
1731 | * @dir: inode destination for new link | |
1732 | * @dentry: dentry for link | |
1733 | * | |
1734 | */ | |
1735 | ||
1736 | static int | |
1737 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, | |
1738 | struct dentry *dentry) | |
1739 | { | |
1740 | int err; | |
1741 | struct p9_fid *dfid, *oldfid; | |
1742 | char *name; | |
1743 | struct v9fs_session_info *v9ses; | |
1744 | struct dentry *dir_dentry; | |
1745 | ||
1746 | P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", | |
1747 | dir->i_ino, old_dentry->d_name.name, | |
1748 | dentry->d_name.name); | |
1749 | ||
1750 | v9ses = v9fs_inode2v9ses(dir); | |
1751 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
1752 | dfid = v9fs_fid_lookup(dir_dentry); | |
1753 | if (IS_ERR(dfid)) | |
1754 | return PTR_ERR(dfid); | |
1755 | ||
1756 | oldfid = v9fs_fid_lookup(old_dentry); | |
1757 | if (IS_ERR(oldfid)) | |
1758 | return PTR_ERR(oldfid); | |
1759 | ||
1760 | name = (char *) dentry->d_name.name; | |
1761 | ||
1762 | err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); | |
1763 | ||
1764 | if (err < 0) { | |
1765 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); | |
1766 | return err; | |
1767 | } | |
1768 | ||
1769 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
1770 | /* Get the latest stat info from server. */ | |
1771 | struct p9_fid *fid; | |
1772 | struct p9_stat_dotl *st; | |
1773 | ||
1774 | fid = v9fs_fid_lookup(old_dentry); | |
1775 | if (IS_ERR(fid)) | |
1776 | return PTR_ERR(fid); | |
1777 | ||
1778 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); | |
1779 | if (IS_ERR(st)) | |
1780 | return PTR_ERR(st); | |
1781 | ||
1782 | v9fs_stat2inode_dotl(st, old_dentry->d_inode); | |
1783 | ||
1784 | kfree(st); | |
1785 | } else { | |
1786 | /* Caching disabled. No need to get upto date stat info. | |
1787 | * This dentry will be released immediately. So, just i_count++ | |
1788 | */ | |
1789 | atomic_inc(&old_dentry->d_inode->i_count); | |
1790 | } | |
1791 | ||
1792 | dentry->d_op = old_dentry->d_op; | |
1793 | d_instantiate(dentry, old_dentry->d_inode); | |
1794 | ||
1795 | return err; | |
1796 | } | |
1797 | ||
2bad8471 EVH |
1798 | /** |
1799 | * v9fs_vfs_mknod - create a special file | |
1800 | * @dir: inode destination for new link | |
1801 | * @dentry: dentry for file | |
1802 | * @mode: mode for creation | |
ee443996 | 1803 | * @rdev: device associated with special file |
2bad8471 EVH |
1804 | * |
1805 | */ | |
1806 | ||
1807 | static int | |
1808 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1809 | { | |
531b1094 LI |
1810 | int retval; |
1811 | char *name; | |
2bad8471 | 1812 | |
bd238fb4 LI |
1813 | P9_DPRINTK(P9_DEBUG_VFS, |
1814 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
2bad8471 EVH |
1815 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
1816 | ||
531b1094 LI |
1817 | if (!new_valid_dev(rdev)) |
1818 | return -EINVAL; | |
2bad8471 | 1819 | |
531b1094 | 1820 | name = __getname(); |
c0291a05 ET |
1821 | if (!name) |
1822 | return -ENOMEM; | |
2bad8471 EVH |
1823 | /* build extension */ |
1824 | if (S_ISBLK(mode)) | |
531b1094 | 1825 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1826 | else if (S_ISCHR(mode)) |
531b1094 | 1827 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1828 | else if (S_ISFIFO(mode)) |
531b1094 | 1829 | *name = 0; |
75cc5c9b VJ |
1830 | else if (S_ISSOCK(mode)) |
1831 | *name = 0; | |
2bad8471 | 1832 | else { |
531b1094 LI |
1833 | __putname(name); |
1834 | return -EINVAL; | |
2bad8471 EVH |
1835 | } |
1836 | ||
531b1094 LI |
1837 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1838 | __putname(name); | |
2bad8471 EVH |
1839 | |
1840 | return retval; | |
1841 | } | |
1842 | ||
4b43516a MK |
1843 | /** |
1844 | * v9fs_vfs_mknod_dotl - create a special file | |
1845 | * @dir: inode destination for new link | |
1846 | * @dentry: dentry for file | |
1847 | * @mode: mode for creation | |
1848 | * @rdev: device associated with special file | |
1849 | * | |
1850 | */ | |
1851 | static int | |
1852 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, | |
1853 | dev_t rdev) | |
1854 | { | |
1855 | int err; | |
1856 | char *name; | |
1857 | struct v9fs_session_info *v9ses; | |
1858 | struct p9_fid *fid = NULL, *dfid = NULL; | |
1859 | struct inode *inode; | |
1860 | gid_t gid; | |
1861 | struct p9_qid qid; | |
01a622bd | 1862 | struct dentry *dir_dentry; |
4b43516a MK |
1863 | |
1864 | P9_DPRINTK(P9_DEBUG_VFS, | |
1865 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
1866 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); | |
1867 | ||
1868 | if (!new_valid_dev(rdev)) | |
1869 | return -EINVAL; | |
1870 | ||
1871 | v9ses = v9fs_inode2v9ses(dir); | |
1872 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
01a622bd | 1873 | dfid = v9fs_fid_lookup(dir_dentry); |
4b43516a MK |
1874 | if (IS_ERR(dfid)) { |
1875 | err = PTR_ERR(dfid); | |
1876 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
1877 | dfid = NULL; | |
1878 | goto error; | |
1879 | } | |
1880 | ||
1881 | gid = v9fs_get_fsgid_for_create(dir); | |
1882 | if (gid < 0) { | |
1883 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); | |
1884 | goto error; | |
1885 | } | |
1886 | ||
1887 | name = (char *) dentry->d_name.name; | |
1888 | ||
1889 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | |
1890 | if (err < 0) | |
1891 | goto error; | |
1892 | ||
1893 | /* instantiate inode and assign the unopened fid to the dentry */ | |
1894 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
1895 | fid = p9_client_walk(dfid, 1, &name, 1); | |
1896 | if (IS_ERR(fid)) { | |
1897 | err = PTR_ERR(fid); | |
1898 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
1899 | err); | |
1900 | fid = NULL; | |
1901 | goto error; | |
1902 | } | |
1903 | ||
1904 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
1905 | if (IS_ERR(inode)) { | |
1906 | err = PTR_ERR(inode); | |
1907 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
1908 | err); | |
1909 | goto error; | |
1910 | } | |
1911 | dentry->d_op = &v9fs_cached_dentry_operations; | |
1912 | d_instantiate(dentry, inode); | |
1913 | err = v9fs_fid_add(dentry, fid); | |
1914 | if (err < 0) | |
1915 | goto error; | |
1916 | fid = NULL; | |
1917 | } else { | |
1918 | /* | |
1919 | * Not in cached mode. No need to populate inode with stat. | |
1920 | * socket syscall returns a fd, so we need instantiate | |
1921 | */ | |
1922 | inode = v9fs_get_inode(dir->i_sb, mode); | |
1923 | if (IS_ERR(inode)) { | |
1924 | err = PTR_ERR(inode); | |
1925 | goto error; | |
1926 | } | |
1927 | dentry->d_op = &v9fs_dentry_operations; | |
1928 | d_instantiate(dentry, inode); | |
1929 | } | |
1930 | ||
1931 | error: | |
1932 | if (fid) | |
1933 | p9_client_clunk(fid); | |
1934 | return err; | |
1935 | } | |
1936 | ||
9b6533c9 SK |
1937 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1938 | .create = v9fs_vfs_create, | |
1939 | .lookup = v9fs_vfs_lookup, | |
1940 | .symlink = v9fs_vfs_symlink, | |
50cc42ff | 1941 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1942 | .unlink = v9fs_vfs_unlink, |
1943 | .mkdir = v9fs_vfs_mkdir, | |
1944 | .rmdir = v9fs_vfs_rmdir, | |
4b43516a | 1945 | .mknod = v9fs_vfs_mknod_dotl, |
9b6533c9 SK |
1946 | .rename = v9fs_vfs_rename, |
1947 | .getattr = v9fs_vfs_getattr, | |
1948 | .setattr = v9fs_vfs_setattr, | |
1949 | }; | |
1950 | ||
1951 | static const struct inode_operations v9fs_dir_inode_operations_dotl = { | |
5643135a | 1952 | .create = v9fs_vfs_create_dotl, |
2bad8471 | 1953 | .lookup = v9fs_vfs_lookup, |
50cc42ff VJJ |
1954 | .link = v9fs_vfs_link_dotl, |
1955 | .symlink = v9fs_vfs_symlink_dotl, | |
2bad8471 | 1956 | .unlink = v9fs_vfs_unlink, |
01a622bd | 1957 | .mkdir = v9fs_vfs_mkdir_dotl, |
2bad8471 | 1958 | .rmdir = v9fs_vfs_rmdir, |
4b43516a | 1959 | .mknod = v9fs_vfs_mknod_dotl, |
2bad8471 | 1960 | .rename = v9fs_vfs_rename, |
f0853122 | 1961 | .getattr = v9fs_vfs_getattr_dotl, |
87d7845a | 1962 | .setattr = v9fs_vfs_setattr_dotl, |
ebf46264 AK |
1963 | .setxattr = generic_setxattr, |
1964 | .getxattr = generic_getxattr, | |
1965 | .removexattr = generic_removexattr, | |
1966 | .listxattr = v9fs_listxattr, | |
1967 | ||
2bad8471 EVH |
1968 | }; |
1969 | ||
754661f1 | 1970 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1971 | .create = v9fs_vfs_create, |
1972 | .lookup = v9fs_vfs_lookup, | |
1973 | .unlink = v9fs_vfs_unlink, | |
1974 | .mkdir = v9fs_vfs_mkdir, | |
1975 | .rmdir = v9fs_vfs_rmdir, | |
1976 | .mknod = v9fs_vfs_mknod, | |
1977 | .rename = v9fs_vfs_rename, | |
1978 | .getattr = v9fs_vfs_getattr, | |
1979 | .setattr = v9fs_vfs_setattr, | |
1980 | }; | |
1981 | ||
754661f1 | 1982 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1983 | .getattr = v9fs_vfs_getattr, |
1984 | .setattr = v9fs_vfs_setattr, | |
1985 | }; | |
1986 | ||
9b6533c9 | 1987 | static const struct inode_operations v9fs_file_inode_operations_dotl = { |
f0853122 | 1988 | .getattr = v9fs_vfs_getattr_dotl, |
87d7845a | 1989 | .setattr = v9fs_vfs_setattr_dotl, |
ebf46264 AK |
1990 | .setxattr = generic_setxattr, |
1991 | .getxattr = generic_getxattr, | |
1992 | .removexattr = generic_removexattr, | |
1993 | .listxattr = v9fs_listxattr, | |
9b6533c9 SK |
1994 | }; |
1995 | ||
754661f1 | 1996 | static const struct inode_operations v9fs_symlink_inode_operations = { |
204f2f0e | 1997 | .readlink = generic_readlink, |
2bad8471 EVH |
1998 | .follow_link = v9fs_vfs_follow_link, |
1999 | .put_link = v9fs_vfs_put_link, | |
2000 | .getattr = v9fs_vfs_getattr, | |
2001 | .setattr = v9fs_vfs_setattr, | |
2002 | }; | |
9b6533c9 SK |
2003 | |
2004 | static const struct inode_operations v9fs_symlink_inode_operations_dotl = { | |
2005 | .readlink = generic_readlink, | |
2006 | .follow_link = v9fs_vfs_follow_link, | |
2007 | .put_link = v9fs_vfs_put_link, | |
f0853122 | 2008 | .getattr = v9fs_vfs_getattr_dotl, |
87d7845a | 2009 | .setattr = v9fs_vfs_setattr_dotl, |
ebf46264 AK |
2010 | .setxattr = generic_setxattr, |
2011 | .getxattr = generic_getxattr, | |
2012 | .removexattr = generic_removexattr, | |
2013 | .listxattr = v9fs_listxattr, | |
9b6533c9 | 2014 | }; |