Commit | Line | Data |
---|---|---|
9e82cf6a EVH |
1 | /* |
2 | * linux/fs/9p/v9fs.c | |
3 | * | |
4 | * This file contains functions assisting in mapping VFS to 9P2000 | |
5 | * | |
8a0dc95f | 6 | * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com> |
9e82cf6a EVH |
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. | |
9e82cf6a 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 | ||
9e82cf6a EVH |
26 | #include <linux/module.h> |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
914e2637 | 29 | #include <linux/sched.h> |
9e82cf6a EVH |
30 | #include <linux/parser.h> |
31 | #include <linux/idr.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
bd238fb4 | 33 | #include <net/9p/9p.h> |
bd238fb4 | 34 | #include <net/9p/client.h> |
8b81ef58 | 35 | #include <net/9p/transport.h> |
9e82cf6a | 36 | #include "v9fs.h" |
9e82cf6a | 37 | #include "v9fs_vfs.h" |
60e78d2c AK |
38 | #include "cache.h" |
39 | ||
40 | static DEFINE_SPINLOCK(v9fs_sessionlist_lock); | |
41 | static LIST_HEAD(v9fs_sessionlist); | |
9e82cf6a EVH |
42 | |
43 | /* | |
60e78d2c AK |
44 | * Option Parsing (code inspired by NFS code) |
45 | * NOTE: each transport will parse its own options | |
46 | */ | |
9e82cf6a EVH |
47 | |
48 | enum { | |
49 | /* Options that take integer arguments */ | |
8a0dc95f | 50 | Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid, |
9e82cf6a | 51 | /* String options */ |
60e78d2c | 52 | Opt_uname, Opt_remotename, Opt_trans, Opt_cache, Opt_cachetag, |
9e82cf6a | 53 | /* Options that take no arguments */ |
8a0dc95f | 54 | Opt_nodevmap, |
e03abc0c | 55 | /* Cache options */ |
60e78d2c | 56 | Opt_cache_loose, Opt_fscache, |
ba17674f | 57 | /* Access options */ |
e782ef71 | 58 | Opt_access, Opt_posixacl, |
9e82cf6a EVH |
59 | /* Error token */ |
60 | Opt_err | |
61 | }; | |
62 | ||
a447c093 | 63 | static const match_table_t tokens = { |
9e2f6688 | 64 | {Opt_debug, "debug=%x"}, |
bd32b82d LI |
65 | {Opt_dfltuid, "dfltuid=%u"}, |
66 | {Opt_dfltgid, "dfltgid=%u"}, | |
9e82cf6a | 67 | {Opt_afid, "afid=%u"}, |
67543e50 | 68 | {Opt_uname, "uname=%s"}, |
9e82cf6a | 69 | {Opt_remotename, "aname=%s"}, |
9e82cf6a | 70 | {Opt_nodevmap, "nodevmap"}, |
60e78d2c | 71 | {Opt_cache, "cache=%s"}, |
e03abc0c | 72 | {Opt_cache_loose, "loose"}, |
60e78d2c AK |
73 | {Opt_fscache, "fscache"}, |
74 | {Opt_cachetag, "cachetag=%s"}, | |
ba17674f | 75 | {Opt_access, "access=%s"}, |
e782ef71 | 76 | {Opt_posixacl, "posixacl"}, |
9e82cf6a EVH |
77 | {Opt_err, NULL} |
78 | }; | |
79 | ||
9e82cf6a EVH |
80 | /** |
81 | * v9fs_parse_options - parse mount options into session structure | |
9e82cf6a EVH |
82 | * @v9ses: existing v9fs session information |
83 | * | |
ab31267d | 84 | * Return 0 upon success, -ERRNO upon failure. |
9e82cf6a EVH |
85 | */ |
86 | ||
4b53e4b5 | 87 | static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) |
9e82cf6a | 88 | { |
d8c8a9e3 | 89 | char *options, *tmp_options; |
9e82cf6a | 90 | substring_t args[MAX_OPT_ARGS]; |
a80d923e | 91 | char *p; |
8a0dc95f | 92 | int option = 0; |
ba17674f | 93 | char *s, *e; |
ab31267d | 94 | int ret = 0; |
9e82cf6a EVH |
95 | |
96 | /* setup defaults */ | |
9e82cf6a EVH |
97 | v9ses->afid = ~0; |
98 | v9ses->debug = 0; | |
e03abc0c | 99 | v9ses->cache = 0; |
60e78d2c AK |
100 | #ifdef CONFIG_9P_FSCACHE |
101 | v9ses->cachetag = NULL; | |
102 | #endif | |
9e82cf6a | 103 | |
4b53e4b5 | 104 | if (!opts) |
ab31267d | 105 | return 0; |
9e82cf6a | 106 | |
d8c8a9e3 | 107 | tmp_options = kstrdup(opts, GFP_KERNEL); |
bf2d29c6 EVH |
108 | if (!tmp_options) { |
109 | ret = -ENOMEM; | |
60e78d2c | 110 | goto fail_option_alloc; |
bf2d29c6 | 111 | } |
d8c8a9e3 | 112 | options = tmp_options; |
ab31267d | 113 | |
9e82cf6a EVH |
114 | while ((p = strsep(&options, ",")) != NULL) { |
115 | int token; | |
116 | if (!*p) | |
117 | continue; | |
118 | token = match_token(p, tokens, args); | |
67543e50 | 119 | if (token < Opt_uname) { |
ab31267d JM |
120 | int r = match_int(&args[0], &option); |
121 | if (r < 0) { | |
bd238fb4 | 122 | P9_DPRINTK(P9_DEBUG_ERROR, |
9e82cf6a | 123 | "integer field, but no integer?\n"); |
ab31267d | 124 | ret = r; |
9e82cf6a EVH |
125 | continue; |
126 | } | |
9e82cf6a EVH |
127 | } |
128 | switch (token) { | |
9e2f6688 EVH |
129 | case Opt_debug: |
130 | v9ses->debug = option; | |
10fa16e7 | 131 | #ifdef CONFIG_NET_9P_DEBUG |
9e2f6688 | 132 | p9_debug_level = option; |
10fa16e7 | 133 | #endif |
9e2f6688 | 134 | break; |
8a0dc95f | 135 | |
bd32b82d LI |
136 | case Opt_dfltuid: |
137 | v9ses->dfltuid = option; | |
9e82cf6a | 138 | break; |
bd32b82d LI |
139 | case Opt_dfltgid: |
140 | v9ses->dfltgid = option; | |
9e82cf6a EVH |
141 | break; |
142 | case Opt_afid: | |
143 | v9ses->afid = option; | |
144 | break; | |
67543e50 | 145 | case Opt_uname: |
b32a09db | 146 | match_strlcpy(v9ses->uname, &args[0], PATH_MAX); |
9e82cf6a EVH |
147 | break; |
148 | case Opt_remotename: | |
b32a09db | 149 | match_strlcpy(v9ses->aname, &args[0], PATH_MAX); |
9e82cf6a | 150 | break; |
9e82cf6a EVH |
151 | case Opt_nodevmap: |
152 | v9ses->nodev = 1; | |
153 | break; | |
e03abc0c EVH |
154 | case Opt_cache_loose: |
155 | v9ses->cache = CACHE_LOOSE; | |
156 | break; | |
60e78d2c AK |
157 | case Opt_fscache: |
158 | v9ses->cache = CACHE_FSCACHE; | |
159 | break; | |
160 | case Opt_cachetag: | |
161 | #ifdef CONFIG_9P_FSCACHE | |
162 | v9ses->cachetag = match_strdup(&args[0]); | |
163 | #endif | |
164 | break; | |
165 | case Opt_cache: | |
166 | s = match_strdup(&args[0]); | |
bf2d29c6 EVH |
167 | if (!s) { |
168 | ret = -ENOMEM; | |
169 | P9_DPRINTK(P9_DEBUG_ERROR, | |
170 | "problem allocating copy of cache arg\n"); | |
171 | goto free_and_return; | |
172 | } | |
60e78d2c AK |
173 | |
174 | if (strcmp(s, "loose") == 0) | |
175 | v9ses->cache = CACHE_LOOSE; | |
176 | else if (strcmp(s, "fscache") == 0) | |
177 | v9ses->cache = CACHE_FSCACHE; | |
178 | else | |
179 | v9ses->cache = CACHE_NONE; | |
180 | kfree(s); | |
181 | break; | |
ba17674f LI |
182 | |
183 | case Opt_access: | |
184 | s = match_strdup(&args[0]); | |
bf2d29c6 EVH |
185 | if (!s) { |
186 | ret = -ENOMEM; | |
187 | P9_DPRINTK(P9_DEBUG_ERROR, | |
188 | "problem allocating copy of access arg\n"); | |
189 | goto free_and_return; | |
190 | } | |
60e78d2c | 191 | |
ba17674f LI |
192 | v9ses->flags &= ~V9FS_ACCESS_MASK; |
193 | if (strcmp(s, "user") == 0) | |
194 | v9ses->flags |= V9FS_ACCESS_USER; | |
195 | else if (strcmp(s, "any") == 0) | |
196 | v9ses->flags |= V9FS_ACCESS_ANY; | |
76381a42 | 197 | else if (strcmp(s, "client") == 0) { |
76381a42 | 198 | v9ses->flags |= V9FS_ACCESS_CLIENT; |
76381a42 | 199 | } else { |
ba17674f | 200 | v9ses->flags |= V9FS_ACCESS_SINGLE; |
f1d9e458 | 201 | v9ses->uid = simple_strtoul(s, &e, 10); |
ba17674f LI |
202 | if (*e != '\0') |
203 | v9ses->uid = ~0; | |
204 | } | |
0a976297 | 205 | kfree(s); |
ba17674f LI |
206 | break; |
207 | ||
e782ef71 VJJ |
208 | case Opt_posixacl: |
209 | #ifdef CONFIG_9P_FS_POSIX_ACL | |
210 | v9ses->flags |= V9FS_POSIX_ACL; | |
211 | #else | |
212 | P9_DPRINTK(P9_DEBUG_ERROR, | |
213 | "Not defined CONFIG_9P_FS_POSIX_ACL. " | |
214 | "Ignoring posixacl option\n"); | |
215 | #endif | |
216 | break; | |
217 | ||
9e82cf6a EVH |
218 | default: |
219 | continue; | |
220 | } | |
221 | } | |
d8c8a9e3 | 222 | |
bf2d29c6 | 223 | free_and_return: |
d8c8a9e3 | 224 | kfree(tmp_options); |
60e78d2c | 225 | fail_option_alloc: |
bf2d29c6 | 226 | return ret; |
9e82cf6a EVH |
227 | } |
228 | ||
9e82cf6a EVH |
229 | /** |
230 | * v9fs_session_init - initialize session | |
231 | * @v9ses: session information structure | |
232 | * @dev_name: device being mounted | |
233 | * @data: options | |
234 | * | |
235 | */ | |
236 | ||
bd238fb4 | 237 | struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, |
9e82cf6a EVH |
238 | const char *dev_name, char *data) |
239 | { | |
9e82cf6a | 240 | int retval = -EINVAL; |
bd238fb4 | 241 | struct p9_fid *fid; |
ab31267d | 242 | int rc; |
9e82cf6a | 243 | |
ba17674f LI |
244 | v9ses->uname = __getname(); |
245 | if (!v9ses->uname) | |
bd238fb4 | 246 | return ERR_PTR(-ENOMEM); |
9e82cf6a | 247 | |
ba17674f LI |
248 | v9ses->aname = __getname(); |
249 | if (!v9ses->aname) { | |
250 | __putname(v9ses->uname); | |
bd238fb4 | 251 | return ERR_PTR(-ENOMEM); |
9e82cf6a | 252 | } |
a534c8d1 | 253 | init_rwsem(&v9ses->rename_sem); |
9e82cf6a | 254 | |
0ed07ddb JA |
255 | rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY); |
256 | if (rc) { | |
257 | __putname(v9ses->aname); | |
258 | __putname(v9ses->uname); | |
259 | return ERR_PTR(rc); | |
260 | } | |
261 | ||
60e78d2c AK |
262 | spin_lock(&v9fs_sessionlist_lock); |
263 | list_add(&v9ses->slist, &v9fs_sessionlist); | |
264 | spin_unlock(&v9fs_sessionlist_lock); | |
265 | ||
476ada04 | 266 | v9ses->flags = V9FS_ACCESS_USER; |
ba17674f LI |
267 | strcpy(v9ses->uname, V9FS_DEFUSER); |
268 | strcpy(v9ses->aname, V9FS_DEFANAME); | |
269 | v9ses->uid = ~0; | |
bd32b82d LI |
270 | v9ses->dfltuid = V9FS_DEFUID; |
271 | v9ses->dfltgid = V9FS_DEFGID; | |
ab31267d | 272 | |
4b53e4b5 | 273 | rc = v9fs_parse_options(v9ses, data); |
ab31267d JM |
274 | if (rc < 0) { |
275 | retval = rc; | |
276 | goto error; | |
277 | } | |
a80d923e | 278 | |
4b53e4b5 | 279 | v9ses->clnt = p9_client_create(dev_name, data); |
bd238fb4 LI |
280 | if (IS_ERR(v9ses->clnt)) { |
281 | retval = PTR_ERR(v9ses->clnt); | |
282 | v9ses->clnt = NULL; | |
283 | P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n"); | |
284 | goto error; | |
9e82cf6a EVH |
285 | } |
286 | ||
476ada04 SK |
287 | if (p9_is_proto_dotl(v9ses->clnt)) |
288 | v9ses->flags |= V9FS_PROTO_2000L; | |
289 | else if (p9_is_proto_dotu(v9ses->clnt)) | |
290 | v9ses->flags |= V9FS_PROTO_2000U; | |
ba17674f | 291 | |
fbedadc1 | 292 | v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ; |
8a0dc95f | 293 | |
76381a42 AK |
294 | if (!v9fs_proto_dotl(v9ses) && |
295 | ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) { | |
296 | /* | |
297 | * We support ACCESS_CLIENT only for dotl. | |
298 | * Fall back to ACCESS_USER | |
299 | */ | |
300 | v9ses->flags &= ~V9FS_ACCESS_MASK; | |
301 | v9ses->flags |= V9FS_ACCESS_USER; | |
302 | } | |
303 | /*FIXME !! */ | |
ba17674f | 304 | /* for legacy mode, fall back to V9FS_ACCESS_ANY */ |
9ffaf63e | 305 | if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) && |
ba17674f LI |
306 | ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) { |
307 | ||
308 | v9ses->flags &= ~V9FS_ACCESS_MASK; | |
309 | v9ses->flags |= V9FS_ACCESS_ANY; | |
310 | v9ses->uid = ~0; | |
311 | } | |
e782ef71 VJJ |
312 | if (!v9fs_proto_dotl(v9ses) || |
313 | !((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) { | |
314 | /* | |
315 | * We support ACL checks on clinet only if the protocol is | |
316 | * 9P2000.L and access is V9FS_ACCESS_CLIENT. | |
317 | */ | |
318 | v9ses->flags &= ~V9FS_ACL_MASK; | |
319 | } | |
ba17674f LI |
320 | |
321 | fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0, | |
322 | v9ses->aname); | |
bd238fb4 LI |
323 | if (IS_ERR(fid)) { |
324 | retval = PTR_ERR(fid); | |
325 | fid = NULL; | |
326 | P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n"); | |
327 | goto error; | |
9e82cf6a EVH |
328 | } |
329 | ||
ba17674f LI |
330 | if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE) |
331 | fid->uid = v9ses->uid; | |
332 | else | |
333 | fid->uid = ~0; | |
334 | ||
60e78d2c AK |
335 | #ifdef CONFIG_9P_FSCACHE |
336 | /* register the session for caching */ | |
337 | v9fs_cache_session_get_cookie(v9ses); | |
338 | #endif | |
339 | ||
bd238fb4 | 340 | return fid; |
9e82cf6a | 341 | |
bd238fb4 | 342 | error: |
0ed07ddb | 343 | bdi_destroy(&v9ses->bdi); |
bd238fb4 | 344 | return ERR_PTR(retval); |
9e82cf6a EVH |
345 | } |
346 | ||
347 | /** | |
348 | * v9fs_session_close - shutdown a session | |
349 | * @v9ses: session information structure | |
350 | * | |
351 | */ | |
352 | ||
353 | void v9fs_session_close(struct v9fs_session_info *v9ses) | |
354 | { | |
bd238fb4 LI |
355 | if (v9ses->clnt) { |
356 | p9_client_destroy(v9ses->clnt); | |
357 | v9ses->clnt = NULL; | |
3cf6429a | 358 | } |
9e82cf6a | 359 | |
60e78d2c AK |
360 | #ifdef CONFIG_9P_FSCACHE |
361 | if (v9ses->fscache) { | |
362 | v9fs_cache_session_put_cookie(v9ses); | |
363 | kfree(v9ses->cachetag); | |
364 | } | |
365 | #endif | |
ba17674f LI |
366 | __putname(v9ses->uname); |
367 | __putname(v9ses->aname); | |
60e78d2c | 368 | |
0ed07ddb JA |
369 | bdi_destroy(&v9ses->bdi); |
370 | ||
60e78d2c AK |
371 | spin_lock(&v9fs_sessionlist_lock); |
372 | list_del(&v9ses->slist); | |
373 | spin_unlock(&v9fs_sessionlist_lock); | |
9e82cf6a EVH |
374 | } |
375 | ||
322b329a | 376 | /** |
ee443996 EVH |
377 | * v9fs_session_cancel - terminate a session |
378 | * @v9ses: session to terminate | |
379 | * | |
380 | * mark transport as disconnected and cancel all pending requests. | |
322b329a | 381 | */ |
ee443996 | 382 | |
322b329a | 383 | void v9fs_session_cancel(struct v9fs_session_info *v9ses) { |
bd238fb4 LI |
384 | P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses); |
385 | p9_client_disconnect(v9ses->clnt); | |
322b329a EVH |
386 | } |
387 | ||
6d96d3ab AK |
388 | /** |
389 | * v9fs_session_begin_cancel - Begin terminate of a session | |
390 | * @v9ses: session to terminate | |
391 | * | |
392 | * After this call we don't allow any request other than clunk. | |
393 | */ | |
394 | ||
395 | void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses) | |
396 | { | |
397 | P9_DPRINTK(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses); | |
398 | p9_client_begin_disconnect(v9ses->clnt); | |
399 | } | |
400 | ||
9e82cf6a EVH |
401 | extern int v9fs_error_init(void); |
402 | ||
60e78d2c AK |
403 | static struct kobject *v9fs_kobj; |
404 | ||
405 | #ifdef CONFIG_9P_FSCACHE | |
9e82cf6a | 406 | /** |
60e78d2c AK |
407 | * caches_show - list caches associated with a session |
408 | * | |
409 | * Returns the size of buffer written. | |
410 | */ | |
411 | ||
412 | static ssize_t caches_show(struct kobject *kobj, | |
413 | struct kobj_attribute *attr, | |
414 | char *buf) | |
415 | { | |
416 | ssize_t n = 0, count = 0, limit = PAGE_SIZE; | |
417 | struct v9fs_session_info *v9ses; | |
418 | ||
419 | spin_lock(&v9fs_sessionlist_lock); | |
420 | list_for_each_entry(v9ses, &v9fs_sessionlist, slist) { | |
421 | if (v9ses->cachetag) { | |
422 | n = snprintf(buf, limit, "%s\n", v9ses->cachetag); | |
423 | if (n < 0) { | |
424 | count = n; | |
425 | break; | |
426 | } | |
427 | ||
428 | count += n; | |
429 | limit -= n; | |
430 | } | |
431 | } | |
432 | ||
433 | spin_unlock(&v9fs_sessionlist_lock); | |
434 | return count; | |
435 | } | |
436 | ||
437 | static struct kobj_attribute v9fs_attr_cache = __ATTR_RO(caches); | |
438 | #endif /* CONFIG_9P_FSCACHE */ | |
439 | ||
440 | static struct attribute *v9fs_attrs[] = { | |
441 | #ifdef CONFIG_9P_FSCACHE | |
442 | &v9fs_attr_cache.attr, | |
443 | #endif | |
444 | NULL, | |
445 | }; | |
446 | ||
447 | static struct attribute_group v9fs_attr_group = { | |
448 | .attrs = v9fs_attrs, | |
449 | }; | |
450 | ||
451 | /** | |
452 | * v9fs_sysfs_init - Initialize the v9fs sysfs interface | |
453 | * | |
454 | */ | |
455 | ||
456 | static int v9fs_sysfs_init(void) | |
457 | { | |
458 | v9fs_kobj = kobject_create_and_add("9p", fs_kobj); | |
459 | if (!v9fs_kobj) | |
460 | return -ENOMEM; | |
461 | ||
462 | if (sysfs_create_group(v9fs_kobj, &v9fs_attr_group)) { | |
463 | kobject_put(v9fs_kobj); | |
464 | return -ENOMEM; | |
465 | } | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | /** | |
471 | * v9fs_sysfs_cleanup - Unregister the v9fs sysfs interface | |
472 | * | |
473 | */ | |
474 | ||
475 | static void v9fs_sysfs_cleanup(void) | |
476 | { | |
477 | sysfs_remove_group(v9fs_kobj, &v9fs_attr_group); | |
478 | kobject_put(v9fs_kobj); | |
479 | } | |
480 | ||
481 | /** | |
482 | * init_v9fs - Initialize module | |
9e82cf6a EVH |
483 | * |
484 | */ | |
485 | ||
486 | static int __init init_v9fs(void) | |
487 | { | |
60e78d2c | 488 | int err; |
f94b3470 | 489 | printk(KERN_INFO "Installing v9fs 9p2000 file system support\n"); |
a80d923e | 490 | /* TODO: Setup list of registered trasnport modules */ |
60e78d2c AK |
491 | err = register_filesystem(&v9fs_fs_type); |
492 | if (err < 0) { | |
493 | printk(KERN_ERR "Failed to register filesystem\n"); | |
494 | return err; | |
495 | } | |
496 | ||
497 | err = v9fs_cache_register(); | |
498 | if (err < 0) { | |
499 | printk(KERN_ERR "Failed to register v9fs for caching\n"); | |
500 | goto out_fs_unreg; | |
501 | } | |
502 | ||
503 | err = v9fs_sysfs_init(); | |
504 | if (err < 0) { | |
505 | printk(KERN_ERR "Failed to register with sysfs\n"); | |
506 | goto out_sysfs_cleanup; | |
507 | } | |
508 | ||
509 | return 0; | |
510 | ||
511 | out_sysfs_cleanup: | |
512 | v9fs_sysfs_cleanup(); | |
513 | ||
514 | out_fs_unreg: | |
515 | unregister_filesystem(&v9fs_fs_type); | |
516 | ||
517 | return err; | |
9e82cf6a EVH |
518 | } |
519 | ||
520 | /** | |
60e78d2c | 521 | * exit_v9fs - shutdown module |
9e82cf6a EVH |
522 | * |
523 | */ | |
524 | ||
525 | static void __exit exit_v9fs(void) | |
526 | { | |
60e78d2c AK |
527 | v9fs_sysfs_cleanup(); |
528 | v9fs_cache_unregister(); | |
9e82cf6a EVH |
529 | unregister_filesystem(&v9fs_fs_type); |
530 | } | |
531 | ||
532 | module_init(init_v9fs) | |
533 | module_exit(exit_v9fs) | |
534 | ||
bd238fb4 | 535 | MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>"); |
9e82cf6a EVH |
536 | MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>"); |
537 | MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>"); | |
538 | MODULE_LICENSE("GPL"); |