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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2002,2004 | |
5 | * Author(s): Steve French (sfrench@us.ibm.com) | |
6 | * | |
7 | * Common Internet FileSystem (CIFS) client | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/mount.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/list.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/vfs.h> | |
34 | #include <linux/mempool.h> | |
6ab16d24 | 35 | #include <linux/delay.h> |
45af7a0f | 36 | #include <linux/kthread.h> |
1da177e4 LT |
37 | #include "cifsfs.h" |
38 | #include "cifspdu.h" | |
39 | #define DECLARE_GLOBALS_HERE | |
40 | #include "cifsglob.h" | |
41 | #include "cifsproto.h" | |
42 | #include "cifs_debug.h" | |
43 | #include "cifs_fs_sb.h" | |
44 | #include <linux/mm.h> | |
45 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ | |
46 | ||
47 | #ifdef CONFIG_CIFS_QUOTA | |
48 | static struct quotactl_ops cifs_quotactl_ops; | |
49 | #endif | |
50 | ||
51 | int cifsFYI = 0; | |
52 | int cifsERROR = 1; | |
53 | int traceSMB = 0; | |
54 | unsigned int oplockEnabled = 1; | |
55 | unsigned int experimEnabled = 0; | |
56 | unsigned int linuxExtEnabled = 1; | |
57 | unsigned int lookupCacheEnabled = 1; | |
58 | unsigned int multiuser_mount = 0; | |
3979877e SF |
59 | unsigned int extended_security = CIFSSEC_DEF; |
60 | /* unsigned int ntlmv2_support = 0; */ | |
1da177e4 LT |
61 | unsigned int sign_CIFS_PDUs = 1; |
62 | extern struct task_struct * oplockThread; /* remove sparse warning */ | |
63 | struct task_struct * oplockThread = NULL; | |
8d0d5094 SF |
64 | extern struct task_struct * dnotifyThread; /* remove sparse warning */ |
65 | struct task_struct * dnotifyThread = NULL; | |
1da177e4 LT |
66 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
67 | module_param(CIFSMaxBufSize, int, 0); | |
68 | MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048"); | |
69 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; | |
70 | module_param(cifs_min_rcv, int, 0); | |
71 | MODULE_PARM_DESC(cifs_min_rcv,"Network buffers in pool. Default: 4 Range: 1 to 64"); | |
72 | unsigned int cifs_min_small = 30; | |
73 | module_param(cifs_min_small, int, 0); | |
74 | MODULE_PARM_DESC(cifs_min_small,"Small network buffers in pool. Default: 30 Range: 2 to 256"); | |
75 | unsigned int cifs_max_pending = CIFS_MAX_REQ; | |
76 | module_param(cifs_max_pending, int, 0); | |
77 | MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256"); | |
78 | ||
1da177e4 LT |
79 | extern mempool_t *cifs_sm_req_poolp; |
80 | extern mempool_t *cifs_req_poolp; | |
81 | extern mempool_t *cifs_mid_poolp; | |
82 | ||
83 | extern kmem_cache_t *cifs_oplock_cachep; | |
84 | ||
85 | static int | |
86 | cifs_read_super(struct super_block *sb, void *data, | |
87 | const char *devname, int silent) | |
88 | { | |
89 | struct inode *inode; | |
90 | struct cifs_sb_info *cifs_sb; | |
91 | int rc = 0; | |
92 | ||
93 | sb->s_flags |= MS_NODIRATIME; /* and probably even noatime */ | |
a048d7a8 | 94 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info),GFP_KERNEL); |
1da177e4 LT |
95 | cifs_sb = CIFS_SB(sb); |
96 | if(cifs_sb == NULL) | |
97 | return -ENOMEM; | |
1da177e4 LT |
98 | |
99 | rc = cifs_mount(sb, cifs_sb, data, devname); | |
100 | ||
101 | if (rc) { | |
102 | if (!silent) | |
103 | cERROR(1, | |
104 | ("cifs_mount failed w/return code = %d", rc)); | |
105 | goto out_mount_failed; | |
106 | } | |
107 | ||
108 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
109 | sb->s_op = &cifs_super_ops; | |
110 | /* if(cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) | |
111 | sb->s_blocksize = cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
112 | #ifdef CONFIG_CIFS_QUOTA | |
113 | sb->s_qcop = &cifs_quotactl_ops; | |
114 | #endif | |
115 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
116 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
117 | inode = iget(sb, ROOT_I); | |
118 | ||
119 | if (!inode) { | |
120 | rc = -ENOMEM; | |
121 | goto out_no_root; | |
122 | } | |
123 | ||
124 | sb->s_root = d_alloc_root(inode); | |
125 | ||
126 | if (!sb->s_root) { | |
127 | rc = -ENOMEM; | |
128 | goto out_no_root; | |
129 | } | |
130 | ||
131 | return 0; | |
132 | ||
133 | out_no_root: | |
134 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
135 | if (inode) | |
136 | iput(inode); | |
137 | ||
138 | out_mount_failed: | |
139 | if(cifs_sb) { | |
140 | if(cifs_sb->local_nls) | |
141 | unload_nls(cifs_sb->local_nls); | |
142 | kfree(cifs_sb); | |
143 | } | |
144 | return rc; | |
145 | } | |
146 | ||
147 | static void | |
148 | cifs_put_super(struct super_block *sb) | |
149 | { | |
150 | int rc = 0; | |
151 | struct cifs_sb_info *cifs_sb; | |
152 | ||
153 | cFYI(1, ("In cifs_put_super")); | |
154 | cifs_sb = CIFS_SB(sb); | |
155 | if(cifs_sb == NULL) { | |
156 | cFYI(1,("Empty cifs superblock info passed to unmount")); | |
157 | return; | |
158 | } | |
159 | rc = cifs_umount(sb, cifs_sb); | |
160 | if (rc) { | |
161 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
162 | } | |
163 | unload_nls(cifs_sb->local_nls); | |
164 | kfree(cifs_sb); | |
165 | return; | |
166 | } | |
167 | ||
168 | static int | |
726c3342 | 169 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 170 | { |
726c3342 | 171 | struct super_block *sb = dentry->d_sb; |
c81156dd SF |
172 | int xid; |
173 | int rc = -EOPNOTSUPP; | |
1da177e4 LT |
174 | struct cifs_sb_info *cifs_sb; |
175 | struct cifsTconInfo *pTcon; | |
176 | ||
177 | xid = GetXid(); | |
178 | ||
179 | cifs_sb = CIFS_SB(sb); | |
180 | pTcon = cifs_sb->tcon; | |
181 | ||
182 | buf->f_type = CIFS_MAGIC_NUMBER; | |
183 | ||
184 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ | |
c81156dd SF |
185 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
186 | presumably be total path, but note | |
187 | that some servers (includinng Samba 3) | |
188 | have a shorter maximum path */ | |
1da177e4 LT |
189 | buf->f_files = 0; /* undefined */ |
190 | buf->f_ffree = 0; /* unlimited */ | |
191 | ||
1da177e4 | 192 | /* BB we could add a second check for a QFS Unix capability bit */ |
f28ac91b | 193 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
194 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
195 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 196 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
197 | |
198 | /* Only need to call the old QFSInfo if failed | |
199 | on newer one */ | |
200 | if(rc) | |
737b758c | 201 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); |
1da177e4 | 202 | |
20962438 SF |
203 | /* Old Windows servers do not support level 103, retry with level |
204 | one if old server failed the previous call */ | |
205 | if(rc) | |
206 | rc = SMBOldQFSInfo(xid, pTcon, buf); | |
1da177e4 LT |
207 | /* |
208 | int f_type; | |
209 | __fsid_t f_fsid; | |
210 | int f_namelen; */ | |
c81156dd | 211 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 212 | FreeXid(xid); |
c81156dd SF |
213 | return 0; /* always return success? what if volume is no |
214 | longer available? */ | |
1da177e4 LT |
215 | } |
216 | ||
217 | static int cifs_permission(struct inode * inode, int mask, struct nameidata *nd) | |
218 | { | |
219 | struct cifs_sb_info *cifs_sb; | |
220 | ||
221 | cifs_sb = CIFS_SB(inode->i_sb); | |
222 | ||
223 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { | |
224 | return 0; | |
225 | } else /* file mode might have been restricted at mount time | |
226 | on the client (above and beyond ACL on servers) for | |
227 | servers which do not support setting and viewing mode bits, | |
228 | so allowing client to check permissions is useful */ | |
229 | return generic_permission(inode, mask, NULL); | |
230 | } | |
231 | ||
232 | static kmem_cache_t *cifs_inode_cachep; | |
233 | static kmem_cache_t *cifs_req_cachep; | |
234 | static kmem_cache_t *cifs_mid_cachep; | |
235 | kmem_cache_t *cifs_oplock_cachep; | |
236 | static kmem_cache_t *cifs_sm_req_cachep; | |
237 | mempool_t *cifs_sm_req_poolp; | |
238 | mempool_t *cifs_req_poolp; | |
239 | mempool_t *cifs_mid_poolp; | |
240 | ||
241 | static struct inode * | |
242 | cifs_alloc_inode(struct super_block *sb) | |
243 | { | |
244 | struct cifsInodeInfo *cifs_inode; | |
245 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, SLAB_KERNEL); | |
246 | if (!cifs_inode) | |
247 | return NULL; | |
248 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
249 | atomic_set(&cifs_inode->inUse, 0); | |
250 | cifs_inode->time = 0; | |
251 | /* Until the file is open and we have gotten oplock | |
252 | info back from the server, can not assume caching of | |
253 | file data or metadata */ | |
254 | cifs_inode->clientCanCacheRead = FALSE; | |
255 | cifs_inode->clientCanCacheAll = FALSE; | |
1da177e4 | 256 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
e30dcf3a | 257 | cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; |
1da177e4 LT |
258 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
259 | return &cifs_inode->vfs_inode; | |
260 | } | |
261 | ||
262 | static void | |
263 | cifs_destroy_inode(struct inode *inode) | |
264 | { | |
265 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
266 | } | |
267 | ||
268 | /* | |
269 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
270 | * Not all settable options are displayed but most of the important | |
271 | * ones are. | |
272 | */ | |
273 | static int | |
274 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
275 | { | |
276 | struct cifs_sb_info *cifs_sb; | |
277 | ||
278 | cifs_sb = CIFS_SB(m->mnt_sb); | |
279 | ||
280 | if (cifs_sb) { | |
281 | if (cifs_sb->tcon) { | |
282 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); | |
283 | if (cifs_sb->tcon->ses) { | |
284 | if (cifs_sb->tcon->ses->userName) | |
285 | seq_printf(s, ",username=%s", | |
286 | cifs_sb->tcon->ses->userName); | |
287 | if(cifs_sb->tcon->ses->domainName) | |
288 | seq_printf(s, ",domain=%s", | |
289 | cifs_sb->tcon->ses->domainName); | |
290 | } | |
291 | } | |
292 | seq_printf(s, ",rsize=%d",cifs_sb->rsize); | |
293 | seq_printf(s, ",wsize=%d",cifs_sb->wsize); | |
294 | } | |
295 | return 0; | |
296 | } | |
297 | ||
298 | #ifdef CONFIG_CIFS_QUOTA | |
299 | int cifs_xquota_set(struct super_block * sb, int quota_type, qid_t qid, | |
300 | struct fs_disk_quota * pdquota) | |
301 | { | |
302 | int xid; | |
303 | int rc = 0; | |
304 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
305 | struct cifsTconInfo *pTcon; | |
306 | ||
307 | if(cifs_sb) | |
308 | pTcon = cifs_sb->tcon; | |
309 | else | |
310 | return -EIO; | |
311 | ||
312 | ||
313 | xid = GetXid(); | |
314 | if(pTcon) { | |
315 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
316 | } else { | |
317 | return -EIO; | |
318 | } | |
319 | ||
320 | FreeXid(xid); | |
321 | return rc; | |
322 | } | |
323 | ||
324 | int cifs_xquota_get(struct super_block * sb, int quota_type, qid_t qid, | |
325 | struct fs_disk_quota * pdquota) | |
326 | { | |
327 | int xid; | |
328 | int rc = 0; | |
329 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
330 | struct cifsTconInfo *pTcon; | |
331 | ||
332 | if(cifs_sb) | |
333 | pTcon = cifs_sb->tcon; | |
334 | else | |
335 | return -EIO; | |
336 | ||
337 | xid = GetXid(); | |
338 | if(pTcon) { | |
339 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
340 | } else { | |
341 | rc = -EIO; | |
342 | } | |
343 | ||
344 | FreeXid(xid); | |
345 | return rc; | |
346 | } | |
347 | ||
348 | int cifs_xstate_set(struct super_block * sb, unsigned int flags, int operation) | |
349 | { | |
350 | int xid; | |
351 | int rc = 0; | |
352 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
353 | struct cifsTconInfo *pTcon; | |
354 | ||
355 | if(cifs_sb) | |
356 | pTcon = cifs_sb->tcon; | |
357 | else | |
358 | return -EIO; | |
359 | ||
360 | xid = GetXid(); | |
361 | if(pTcon) { | |
362 | cFYI(1,("flags: 0x%x operation: 0x%x",flags,operation)); | |
363 | } else { | |
364 | rc = -EIO; | |
365 | } | |
366 | ||
367 | FreeXid(xid); | |
368 | return rc; | |
369 | } | |
370 | ||
371 | int cifs_xstate_get(struct super_block * sb, struct fs_quota_stat *qstats) | |
372 | { | |
373 | int xid; | |
374 | int rc = 0; | |
375 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
376 | struct cifsTconInfo *pTcon; | |
377 | ||
378 | if(cifs_sb) { | |
379 | pTcon = cifs_sb->tcon; | |
380 | } else { | |
381 | return -EIO; | |
382 | } | |
383 | xid = GetXid(); | |
384 | if(pTcon) { | |
385 | cFYI(1,("pqstats %p",qstats)); | |
386 | } else { | |
387 | rc = -EIO; | |
388 | } | |
389 | ||
390 | FreeXid(xid); | |
391 | return rc; | |
392 | } | |
393 | ||
394 | static struct quotactl_ops cifs_quotactl_ops = { | |
395 | .set_xquota = cifs_xquota_set, | |
396 | .get_xquota = cifs_xquota_set, | |
397 | .set_xstate = cifs_xstate_set, | |
398 | .get_xstate = cifs_xstate_get, | |
399 | }; | |
400 | #endif | |
401 | ||
8b512d9a | 402 | static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags) |
68058e75 | 403 | { |
5e1253b5 | 404 | struct cifs_sb_info *cifs_sb; |
9e2e85f8 | 405 | struct cifsTconInfo * tcon; |
68058e75 | 406 | |
8b512d9a TM |
407 | if (!(flags & MNT_FORCE)) |
408 | return; | |
409 | cifs_sb = CIFS_SB(vfsmnt->mnt_sb); | |
5e1253b5 | 410 | if(cifs_sb == NULL) |
9e2e85f8 SF |
411 | return; |
412 | ||
413 | tcon = cifs_sb->tcon; | |
414 | if(tcon == NULL) | |
415 | return; | |
5e1253b5 SF |
416 | down(&tcon->tconSem); |
417 | if (atomic_read(&tcon->useCount) == 1) | |
418 | tcon->tidStatus = CifsExiting; | |
419 | up(&tcon->tconSem); | |
420 | ||
3a5ff61c | 421 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 422 | /* cancel_notify_requests(tcon); */ |
9e2e85f8 | 423 | if(tcon->ses && tcon->ses->server) |
5e1253b5 | 424 | { |
7b7abfe3 | 425 | cFYI(1,("wake up tasks now - umount begin not complete")); |
9e2e85f8 | 426 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
427 | wake_up_all(&tcon->ses->server->response_q); |
428 | msleep(1); /* yield */ | |
429 | /* we have to kick the requests once more */ | |
430 | wake_up_all(&tcon->ses->server->response_q); | |
431 | msleep(1); | |
5e1253b5 SF |
432 | } |
433 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
434 | |
435 | return; | |
436 | } | |
68058e75 | 437 | |
1da177e4 LT |
438 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
439 | { | |
440 | *flags |= MS_NODIRATIME; | |
441 | return 0; | |
442 | } | |
443 | ||
444 | struct super_operations cifs_super_ops = { | |
445 | .read_inode = cifs_read_inode, | |
446 | .put_super = cifs_put_super, | |
447 | .statfs = cifs_statfs, | |
448 | .alloc_inode = cifs_alloc_inode, | |
449 | .destroy_inode = cifs_destroy_inode, | |
450 | /* .drop_inode = generic_delete_inode, | |
451 | .delete_inode = cifs_delete_inode, *//* Do not need the above two functions | |
452 | unless later we add lazy close of inodes or unless the kernel forgets to call | |
453 | us with the same number of releases (closes) as opens */ | |
454 | .show_options = cifs_show_options, | |
7b7abfe3 | 455 | .umount_begin = cifs_umount_begin, |
1da177e4 LT |
456 | .remount_fs = cifs_remount, |
457 | }; | |
458 | ||
454e2398 | 459 | static int |
1da177e4 | 460 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 461 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
462 | { |
463 | int rc; | |
464 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
465 | ||
466 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
467 | ||
468 | if (IS_ERR(sb)) | |
454e2398 | 469 | return PTR_ERR(sb); |
1da177e4 LT |
470 | |
471 | sb->s_flags = flags; | |
472 | ||
9b04c997 | 473 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
474 | if (rc) { |
475 | up_write(&sb->s_umount); | |
476 | deactivate_super(sb); | |
454e2398 | 477 | return rc; |
1da177e4 LT |
478 | } |
479 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 480 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
481 | } |
482 | ||
87c89dd7 SF |
483 | static ssize_t cifs_file_writev(struct file *file, const struct iovec *iov, |
484 | unsigned long nr_segs, loff_t *ppos) | |
1da177e4 | 485 | { |
87c89dd7 SF |
486 | struct inode *inode = file->f_dentry->d_inode; |
487 | ssize_t written; | |
1da177e4 | 488 | |
87c89dd7 SF |
489 | written = generic_file_writev(file, iov, nr_segs, ppos); |
490 | if (!CIFS_I(inode)->clientCanCacheAll) | |
491 | filemap_fdatawrite(inode->i_mapping); | |
492 | return written; | |
1da177e4 LT |
493 | } |
494 | ||
87c89dd7 SF |
495 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf, |
496 | size_t count, loff_t pos) | |
1da177e4 | 497 | { |
87c89dd7 | 498 | struct inode *inode = iocb->ki_filp->f_dentry->d_inode; |
1da177e4 LT |
499 | ssize_t written; |
500 | ||
87c89dd7 SF |
501 | written = generic_file_aio_write(iocb, buf, count, pos); |
502 | if (!CIFS_I(inode)->clientCanCacheAll) | |
503 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
504 | return written; |
505 | } | |
506 | ||
c32a0b68 SF |
507 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
508 | { | |
509 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
510 | if (origin == 2) { | |
511 | int retval = cifs_revalidate(file->f_dentry); | |
512 | if (retval < 0) | |
513 | return (loff_t)retval; | |
514 | } | |
515 | return remote_llseek(file, offset, origin); | |
516 | } | |
517 | ||
1da177e4 LT |
518 | static struct file_system_type cifs_fs_type = { |
519 | .owner = THIS_MODULE, | |
520 | .name = "cifs", | |
521 | .get_sb = cifs_get_sb, | |
522 | .kill_sb = kill_anon_super, | |
523 | /* .fs_flags */ | |
524 | }; | |
525 | struct inode_operations cifs_dir_inode_ops = { | |
526 | .create = cifs_create, | |
527 | .lookup = cifs_lookup, | |
528 | .getattr = cifs_getattr, | |
529 | .unlink = cifs_unlink, | |
530 | .link = cifs_hardlink, | |
531 | .mkdir = cifs_mkdir, | |
532 | .rmdir = cifs_rmdir, | |
533 | .rename = cifs_rename, | |
534 | .permission = cifs_permission, | |
535 | /* revalidate:cifs_revalidate, */ | |
536 | .setattr = cifs_setattr, | |
537 | .symlink = cifs_symlink, | |
538 | .mknod = cifs_mknod, | |
539 | #ifdef CONFIG_CIFS_XATTR | |
540 | .setxattr = cifs_setxattr, | |
541 | .getxattr = cifs_getxattr, | |
542 | .listxattr = cifs_listxattr, | |
543 | .removexattr = cifs_removexattr, | |
544 | #endif | |
545 | }; | |
546 | ||
547 | struct inode_operations cifs_file_inode_ops = { | |
548 | /* revalidate:cifs_revalidate, */ | |
549 | .setattr = cifs_setattr, | |
550 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
551 | .rename = cifs_rename, | |
552 | .permission = cifs_permission, | |
553 | #ifdef CONFIG_CIFS_XATTR | |
554 | .setxattr = cifs_setxattr, | |
555 | .getxattr = cifs_getxattr, | |
556 | .listxattr = cifs_listxattr, | |
557 | .removexattr = cifs_removexattr, | |
558 | #endif | |
559 | }; | |
560 | ||
561 | struct inode_operations cifs_symlink_inode_ops = { | |
562 | .readlink = generic_readlink, | |
563 | .follow_link = cifs_follow_link, | |
564 | .put_link = cifs_put_link, | |
565 | .permission = cifs_permission, | |
566 | /* BB add the following two eventually */ | |
567 | /* revalidate: cifs_revalidate, | |
568 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
569 | #ifdef CONFIG_CIFS_XATTR | |
570 | .setxattr = cifs_setxattr, | |
571 | .getxattr = cifs_getxattr, | |
572 | .listxattr = cifs_listxattr, | |
573 | .removexattr = cifs_removexattr, | |
574 | #endif | |
575 | }; | |
576 | ||
4b6f5d20 | 577 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
578 | .read = do_sync_read, |
579 | .write = do_sync_write, | |
580 | .readv = generic_file_readv, | |
581 | .writev = cifs_file_writev, | |
582 | .aio_read = generic_file_aio_read, | |
583 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
584 | .open = cifs_open, |
585 | .release = cifs_close, | |
586 | .lock = cifs_lock, | |
587 | .fsync = cifs_fsync, | |
588 | .flush = cifs_flush, | |
589 | .mmap = cifs_file_mmap, | |
590 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 591 | .llseek = cifs_llseek, |
c67593a0 SF |
592 | #ifdef CONFIG_CIFS_POSIX |
593 | .ioctl = cifs_ioctl, | |
594 | #endif /* CONFIG_CIFS_POSIX */ | |
595 | ||
1da177e4 | 596 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
597 | .dir_notify = cifs_dir_notify, |
598 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
599 | }; | |
600 | ||
4b6f5d20 | 601 | const struct file_operations cifs_file_direct_ops = { |
1da177e4 LT |
602 | /* no mmap, no aio, no readv - |
603 | BB reevaluate whether they can be done with directio, no cache */ | |
604 | .read = cifs_user_read, | |
605 | .write = cifs_user_write, | |
606 | .open = cifs_open, | |
607 | .release = cifs_close, | |
608 | .lock = cifs_lock, | |
609 | .fsync = cifs_fsync, | |
610 | .flush = cifs_flush, | |
611 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
c67593a0 SF |
612 | #ifdef CONFIG_CIFS_POSIX |
613 | .ioctl = cifs_ioctl, | |
614 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 615 | .llseek = cifs_llseek, |
1da177e4 LT |
616 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
617 | .dir_notify = cifs_dir_notify, | |
618 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
619 | }; | |
4b6f5d20 | 620 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
621 | .read = do_sync_read, |
622 | .write = do_sync_write, | |
623 | .readv = generic_file_readv, | |
624 | .writev = cifs_file_writev, | |
625 | .aio_read = generic_file_aio_read, | |
626 | .aio_write = cifs_file_aio_write, | |
627 | .open = cifs_open, | |
628 | .release = cifs_close, | |
629 | .fsync = cifs_fsync, | |
630 | .flush = cifs_flush, | |
631 | .mmap = cifs_file_mmap, | |
632 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 633 | .llseek = cifs_llseek, |
8b94bcb9 | 634 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 635 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
636 | #endif /* CONFIG_CIFS_POSIX */ |
637 | ||
638 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 639 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
640 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
641 | }; | |
642 | ||
4b6f5d20 | 643 | const struct file_operations cifs_file_direct_nobrl_ops = { |
87c89dd7 SF |
644 | /* no mmap, no aio, no readv - |
645 | BB reevaluate whether they can be done with directio, no cache */ | |
646 | .read = cifs_user_read, | |
647 | .write = cifs_user_write, | |
648 | .open = cifs_open, | |
649 | .release = cifs_close, | |
650 | .fsync = cifs_fsync, | |
651 | .flush = cifs_flush, | |
652 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
8b94bcb9 | 653 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 654 | .ioctl = cifs_ioctl, |
8b94bcb9 | 655 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 656 | .llseek = cifs_llseek, |
8b94bcb9 | 657 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 658 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
659 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
660 | }; | |
1da177e4 | 661 | |
4b6f5d20 | 662 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
663 | .readdir = cifs_readdir, |
664 | .release = cifs_closedir, | |
665 | .read = generic_read_dir, | |
666 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
667 | .dir_notify = cifs_dir_notify, | |
668 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
f28ac91b | 669 | .ioctl = cifs_ioctl, |
1da177e4 LT |
670 | }; |
671 | ||
672 | static void | |
673 | cifs_init_once(void *inode, kmem_cache_t * cachep, unsigned long flags) | |
674 | { | |
675 | struct cifsInodeInfo *cifsi = inode; | |
676 | ||
677 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | |
678 | SLAB_CTOR_CONSTRUCTOR) { | |
679 | inode_init_once(&cifsi->vfs_inode); | |
680 | INIT_LIST_HEAD(&cifsi->lockList); | |
681 | } | |
682 | } | |
683 | ||
684 | static int | |
685 | cifs_init_inodecache(void) | |
686 | { | |
687 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
688 | sizeof (struct cifsInodeInfo), | |
fffb60f9 PJ |
689 | 0, (SLAB_RECLAIM_ACCOUNT| |
690 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
691 | cifs_init_once, NULL); |
692 | if (cifs_inode_cachep == NULL) | |
693 | return -ENOMEM; | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | static void | |
699 | cifs_destroy_inodecache(void) | |
700 | { | |
1a1d92c1 | 701 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
702 | } |
703 | ||
704 | static int | |
705 | cifs_init_request_bufs(void) | |
706 | { | |
707 | if(CIFSMaxBufSize < 8192) { | |
708 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum | |
709 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
710 | CIFSMaxBufSize = 8192; | |
711 | } else if (CIFSMaxBufSize > 1024*127) { | |
712 | CIFSMaxBufSize = 1024 * 127; | |
713 | } else { | |
714 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
715 | } | |
716 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
717 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
718 | CIFSMaxBufSize + | |
719 | MAX_CIFS_HDR_SIZE, 0, | |
720 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
721 | if (cifs_req_cachep == NULL) | |
722 | return -ENOMEM; | |
723 | ||
724 | if(cifs_min_rcv < 1) | |
725 | cifs_min_rcv = 1; | |
726 | else if (cifs_min_rcv > 64) { | |
727 | cifs_min_rcv = 64; | |
728 | cERROR(1,("cifs_min_rcv set to maximum (64)")); | |
729 | } | |
730 | ||
93d2341c MD |
731 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
732 | cifs_req_cachep); | |
1da177e4 LT |
733 | |
734 | if(cifs_req_poolp == NULL) { | |
735 | kmem_cache_destroy(cifs_req_cachep); | |
736 | return -ENOMEM; | |
737 | } | |
ec637e3f | 738 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
739 | almost all handle based requests (but not write response, nor is it |
740 | sufficient for path based requests). A smaller size would have | |
741 | been more efficient (compacting multiple slab items on one 4k page) | |
742 | for the case in which debug was on, but this larger size allows | |
743 | more SMBs to use small buffer alloc and is still much more | |
744 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
745 | alloc of large cifs buffers even when page debugging is on */ | |
746 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
ec637e3f SF |
747 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
748 | NULL, NULL); | |
1da177e4 LT |
749 | if (cifs_sm_req_cachep == NULL) { |
750 | mempool_destroy(cifs_req_poolp); | |
751 | kmem_cache_destroy(cifs_req_cachep); | |
752 | return -ENOMEM; | |
753 | } | |
754 | ||
755 | if(cifs_min_small < 2) | |
756 | cifs_min_small = 2; | |
757 | else if (cifs_min_small > 256) { | |
758 | cifs_min_small = 256; | |
759 | cFYI(1,("cifs_min_small set to maximum (256)")); | |
760 | } | |
761 | ||
93d2341c MD |
762 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
763 | cifs_sm_req_cachep); | |
1da177e4 LT |
764 | |
765 | if(cifs_sm_req_poolp == NULL) { | |
766 | mempool_destroy(cifs_req_poolp); | |
767 | kmem_cache_destroy(cifs_req_cachep); | |
768 | kmem_cache_destroy(cifs_sm_req_cachep); | |
769 | return -ENOMEM; | |
770 | } | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | static void | |
776 | cifs_destroy_request_bufs(void) | |
777 | { | |
778 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 779 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 780 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 781 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
782 | } |
783 | ||
784 | static int | |
785 | cifs_init_mids(void) | |
786 | { | |
787 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
788 | sizeof (struct mid_q_entry), 0, | |
789 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
790 | if (cifs_mid_cachep == NULL) | |
791 | return -ENOMEM; | |
792 | ||
93d2341c MD |
793 | /* 3 is a reasonable minimum number of simultaneous operations */ |
794 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
1da177e4 LT |
795 | if(cifs_mid_poolp == NULL) { |
796 | kmem_cache_destroy(cifs_mid_cachep); | |
797 | return -ENOMEM; | |
798 | } | |
799 | ||
800 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
801 | sizeof (struct oplock_q_entry), 0, | |
802 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
803 | if (cifs_oplock_cachep == NULL) { | |
804 | kmem_cache_destroy(cifs_mid_cachep); | |
805 | mempool_destroy(cifs_mid_poolp); | |
806 | return -ENOMEM; | |
807 | } | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | static void | |
813 | cifs_destroy_mids(void) | |
814 | { | |
815 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
816 | kmem_cache_destroy(cifs_mid_cachep); |
817 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
818 | } |
819 | ||
820 | static int cifs_oplock_thread(void * dummyarg) | |
821 | { | |
822 | struct oplock_q_entry * oplock_item; | |
823 | struct cifsTconInfo *pTcon; | |
824 | struct inode * inode; | |
825 | __u16 netfid; | |
826 | int rc; | |
827 | ||
1da177e4 | 828 | do { |
ede1327e SF |
829 | if (try_to_freeze()) |
830 | continue; | |
1da177e4 | 831 | |
1da177e4 LT |
832 | spin_lock(&GlobalMid_Lock); |
833 | if(list_empty(&GlobalOplock_Q)) { | |
834 | spin_unlock(&GlobalMid_Lock); | |
835 | set_current_state(TASK_INTERRUPTIBLE); | |
836 | schedule_timeout(39*HZ); | |
837 | } else { | |
838 | oplock_item = list_entry(GlobalOplock_Q.next, | |
839 | struct oplock_q_entry, qhead); | |
840 | if(oplock_item) { | |
841 | cFYI(1,("found oplock item to write out")); | |
842 | pTcon = oplock_item->tcon; | |
843 | inode = oplock_item->pinode; | |
844 | netfid = oplock_item->netfid; | |
845 | spin_unlock(&GlobalMid_Lock); | |
846 | DeleteOplockQEntry(oplock_item); | |
847 | /* can not grab inode sem here since it would | |
848 | deadlock when oplock received on delete | |
1b1dcc1b | 849 | since vfs_unlink holds the i_mutex across |
1da177e4 | 850 | the call */ |
1b1dcc1b | 851 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 LT |
852 | if (S_ISREG(inode->i_mode)) { |
853 | rc = filemap_fdatawrite(inode->i_mapping); | |
854 | if(CIFS_I(inode)->clientCanCacheRead == 0) { | |
855 | filemap_fdatawait(inode->i_mapping); | |
856 | invalidate_remote_inode(inode); | |
857 | } | |
858 | } else | |
859 | rc = 0; | |
1b1dcc1b | 860 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
861 | if (rc) |
862 | CIFS_I(inode)->write_behind_rc = rc; | |
863 | cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); | |
864 | ||
865 | /* releasing a stale oplock after recent reconnection | |
866 | of smb session using a now incorrect file | |
867 | handle is not a data integrity issue but do | |
868 | not bother sending an oplock release if session | |
869 | to server still is disconnected since oplock | |
870 | already released by the server in that case */ | |
871 | if(pTcon->tidStatus != CifsNeedReconnect) { | |
872 | rc = CIFSSMBLock(0, pTcon, netfid, | |
873 | 0 /* len */ , 0 /* offset */, 0, | |
874 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
875 | 0 /* wait flag */); | |
876 | cFYI(1,("Oplock release rc = %d ",rc)); | |
877 | } | |
878 | } else | |
879 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
880 | set_current_state(TASK_INTERRUPTIBLE); |
881 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 882 | } |
45af7a0f SF |
883 | } while (!kthread_should_stop()); |
884 | ||
885 | return 0; | |
1da177e4 LT |
886 | } |
887 | ||
8d0d5094 SF |
888 | static int cifs_dnotify_thread(void * dummyarg) |
889 | { | |
6ab16d24 SF |
890 | struct list_head *tmp; |
891 | struct cifsSesInfo *ses; | |
892 | ||
8d0d5094 | 893 | do { |
0fd1ffe0 | 894 | if (try_to_freeze()) |
16abbecd | 895 | continue; |
8d0d5094 | 896 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
897 | schedule_timeout(15*HZ); |
898 | read_lock(&GlobalSMBSeslock); | |
899 | /* check if any stuck requests that need | |
900 | to be woken up and wakeq so the | |
901 | thread can wake up and error out */ | |
902 | list_for_each(tmp, &GlobalSMBSessionList) { | |
903 | ses = list_entry(tmp, struct cifsSesInfo, | |
904 | cifsSessionList); | |
905 | if(ses && ses->server && | |
2a138ebb | 906 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
907 | wake_up_all(&ses->server->response_q); |
908 | } | |
909 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
910 | } while (!kthread_should_stop()); |
911 | ||
912 | return 0; | |
1da177e4 LT |
913 | } |
914 | ||
915 | static int __init | |
916 | init_cifs(void) | |
917 | { | |
918 | int rc = 0; | |
919 | #ifdef CONFIG_PROC_FS | |
920 | cifs_proc_init(); | |
921 | #endif | |
922 | INIT_LIST_HEAD(&GlobalServerList); /* BB not implemented yet */ | |
923 | INIT_LIST_HEAD(&GlobalSMBSessionList); | |
924 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
925 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
926 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
927 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
928 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
929 | #endif | |
1da177e4 LT |
930 | /* |
931 | * Initialize Global counters | |
932 | */ | |
933 | atomic_set(&sesInfoAllocCount, 0); | |
934 | atomic_set(&tconInfoAllocCount, 0); | |
935 | atomic_set(&tcpSesAllocCount,0); | |
936 | atomic_set(&tcpSesReconnectCount, 0); | |
937 | atomic_set(&tconInfoReconnectCount, 0); | |
938 | ||
939 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
940 | atomic_set(&smBufAllocCount, 0); |
941 | #ifdef CONFIG_CIFS_STATS2 | |
942 | atomic_set(&totBufAllocCount, 0); | |
943 | atomic_set(&totSmBufAllocCount, 0); | |
944 | #endif /* CONFIG_CIFS_STATS2 */ | |
945 | ||
1da177e4 LT |
946 | atomic_set(&midCount, 0); |
947 | GlobalCurrentXid = 0; | |
948 | GlobalTotalActiveXid = 0; | |
949 | GlobalMaxActiveXid = 0; | |
950 | rwlock_init(&GlobalSMBSeslock); | |
951 | spin_lock_init(&GlobalMid_Lock); | |
952 | ||
953 | if(cifs_max_pending < 2) { | |
954 | cifs_max_pending = 2; | |
955 | cFYI(1,("cifs_max_pending set to min of 2")); | |
956 | } else if(cifs_max_pending > 256) { | |
957 | cifs_max_pending = 256; | |
958 | cFYI(1,("cifs_max_pending set to max of 256")); | |
959 | } | |
960 | ||
961 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
962 | if (rc) |
963 | goto out_clean_proc; | |
964 | ||
965 | rc = cifs_init_mids(); | |
966 | if (rc) | |
967 | goto out_destroy_inodecache; | |
968 | ||
969 | rc = cifs_init_request_bufs(); | |
970 | if (rc) | |
971 | goto out_destroy_mids; | |
972 | ||
973 | rc = register_filesystem(&cifs_fs_type); | |
974 | if (rc) | |
975 | goto out_destroy_request_bufs; | |
976 | ||
977 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); | |
978 | if (IS_ERR(oplockThread)) { | |
979 | rc = PTR_ERR(oplockThread); | |
980 | cERROR(1,("error %d create oplock thread", rc)); | |
981 | goto out_unregister_filesystem; | |
1da177e4 | 982 | } |
45af7a0f SF |
983 | |
984 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
985 | if (IS_ERR(dnotifyThread)) { | |
986 | rc = PTR_ERR(dnotifyThread); | |
987 | cERROR(1,("error %d create dnotify thread", rc)); | |
988 | goto out_stop_oplock_thread; | |
989 | } | |
990 | ||
991 | return 0; | |
992 | ||
993 | out_stop_oplock_thread: | |
994 | kthread_stop(oplockThread); | |
995 | out_unregister_filesystem: | |
996 | unregister_filesystem(&cifs_fs_type); | |
997 | out_destroy_request_bufs: | |
998 | cifs_destroy_request_bufs(); | |
999 | out_destroy_mids: | |
1000 | cifs_destroy_mids(); | |
1001 | out_destroy_inodecache: | |
1002 | cifs_destroy_inodecache(); | |
1003 | out_clean_proc: | |
1da177e4 LT |
1004 | #ifdef CONFIG_PROC_FS |
1005 | cifs_proc_clean(); | |
1006 | #endif | |
1007 | return rc; | |
1008 | } | |
1009 | ||
1010 | static void __exit | |
1011 | exit_cifs(void) | |
1012 | { | |
1013 | cFYI(0, ("In unregister ie exit_cifs")); | |
1014 | #ifdef CONFIG_PROC_FS | |
1015 | cifs_proc_clean(); | |
1016 | #endif | |
1017 | unregister_filesystem(&cifs_fs_type); | |
1018 | cifs_destroy_inodecache(); | |
1019 | cifs_destroy_mids(); | |
1020 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1021 | kthread_stop(oplockThread); |
1022 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
1026 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ | |
1027 | MODULE_DESCRIPTION | |
1028 | ("VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows"); | |
1029 | MODULE_VERSION(CIFS_VERSION); | |
1030 | module_init(init_cifs) | |
1031 | module_exit(exit_cifs) |