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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> |
7dfb7103 | 37 | #include <linux/freezer.h> |
1da177e4 LT |
38 | #include "cifsfs.h" |
39 | #include "cifspdu.h" | |
40 | #define DECLARE_GLOBALS_HERE | |
41 | #include "cifsglob.h" | |
42 | #include "cifsproto.h" | |
43 | #include "cifs_debug.h" | |
44 | #include "cifs_fs_sb.h" | |
45 | #include <linux/mm.h> | |
46 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ | |
47 | ||
48 | #ifdef CONFIG_CIFS_QUOTA | |
49 | static struct quotactl_ops cifs_quotactl_ops; | |
50 | #endif | |
51 | ||
52 | int cifsFYI = 0; | |
53 | int cifsERROR = 1; | |
54 | int traceSMB = 0; | |
55 | unsigned int oplockEnabled = 1; | |
56 | unsigned int experimEnabled = 0; | |
57 | unsigned int linuxExtEnabled = 1; | |
58 | unsigned int lookupCacheEnabled = 1; | |
59 | unsigned int multiuser_mount = 0; | |
3979877e SF |
60 | unsigned int extended_security = CIFSSEC_DEF; |
61 | /* unsigned int ntlmv2_support = 0; */ | |
1da177e4 LT |
62 | unsigned int sign_CIFS_PDUs = 1; |
63 | extern struct task_struct * oplockThread; /* remove sparse warning */ | |
64 | struct task_struct * oplockThread = NULL; | |
8d0d5094 SF |
65 | extern struct task_struct * dnotifyThread; /* remove sparse warning */ |
66 | struct task_struct * dnotifyThread = NULL; | |
e33c74d0 | 67 | static struct super_operations cifs_super_ops; |
1da177e4 LT |
68 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
69 | module_param(CIFSMaxBufSize, int, 0); | |
70 | MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048"); | |
71 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; | |
72 | module_param(cifs_min_rcv, int, 0); | |
73 | MODULE_PARM_DESC(cifs_min_rcv,"Network buffers in pool. Default: 4 Range: 1 to 64"); | |
74 | unsigned int cifs_min_small = 30; | |
75 | module_param(cifs_min_small, int, 0); | |
76 | MODULE_PARM_DESC(cifs_min_small,"Small network buffers in pool. Default: 30 Range: 2 to 256"); | |
77 | unsigned int cifs_max_pending = CIFS_MAX_REQ; | |
78 | module_param(cifs_max_pending, int, 0); | |
79 | MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256"); | |
80 | ||
1da177e4 LT |
81 | extern mempool_t *cifs_sm_req_poolp; |
82 | extern mempool_t *cifs_req_poolp; | |
83 | extern mempool_t *cifs_mid_poolp; | |
84 | ||
e18b890b | 85 | extern struct kmem_cache *cifs_oplock_cachep; |
1da177e4 LT |
86 | |
87 | static int | |
88 | cifs_read_super(struct super_block *sb, void *data, | |
89 | const char *devname, int silent) | |
90 | { | |
91 | struct inode *inode; | |
92 | struct cifs_sb_info *cifs_sb; | |
93 | int rc = 0; | |
94 | ||
95 | sb->s_flags |= MS_NODIRATIME; /* and probably even noatime */ | |
a048d7a8 | 96 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info),GFP_KERNEL); |
1da177e4 LT |
97 | cifs_sb = CIFS_SB(sb); |
98 | if(cifs_sb == NULL) | |
99 | return -ENOMEM; | |
1da177e4 LT |
100 | |
101 | rc = cifs_mount(sb, cifs_sb, data, devname); | |
102 | ||
103 | if (rc) { | |
104 | if (!silent) | |
105 | cERROR(1, | |
106 | ("cifs_mount failed w/return code = %d", rc)); | |
107 | goto out_mount_failed; | |
108 | } | |
109 | ||
110 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
111 | sb->s_op = &cifs_super_ops; | |
112 | /* if(cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) | |
113 | sb->s_blocksize = cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
114 | #ifdef CONFIG_CIFS_QUOTA | |
115 | sb->s_qcop = &cifs_quotactl_ops; | |
116 | #endif | |
117 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
118 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
119 | inode = iget(sb, ROOT_I); | |
120 | ||
121 | if (!inode) { | |
122 | rc = -ENOMEM; | |
123 | goto out_no_root; | |
124 | } | |
125 | ||
126 | sb->s_root = d_alloc_root(inode); | |
127 | ||
128 | if (!sb->s_root) { | |
129 | rc = -ENOMEM; | |
130 | goto out_no_root; | |
131 | } | |
132 | ||
133 | return 0; | |
134 | ||
135 | out_no_root: | |
136 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
137 | if (inode) | |
138 | iput(inode); | |
139 | ||
140 | out_mount_failed: | |
141 | if(cifs_sb) { | |
142 | if(cifs_sb->local_nls) | |
143 | unload_nls(cifs_sb->local_nls); | |
144 | kfree(cifs_sb); | |
145 | } | |
146 | return rc; | |
147 | } | |
148 | ||
149 | static void | |
150 | cifs_put_super(struct super_block *sb) | |
151 | { | |
152 | int rc = 0; | |
153 | struct cifs_sb_info *cifs_sb; | |
154 | ||
155 | cFYI(1, ("In cifs_put_super")); | |
156 | cifs_sb = CIFS_SB(sb); | |
157 | if(cifs_sb == NULL) { | |
158 | cFYI(1,("Empty cifs superblock info passed to unmount")); | |
159 | return; | |
160 | } | |
161 | rc = cifs_umount(sb, cifs_sb); | |
162 | if (rc) { | |
163 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
164 | } | |
165 | unload_nls(cifs_sb->local_nls); | |
166 | kfree(cifs_sb); | |
167 | return; | |
168 | } | |
169 | ||
170 | static int | |
726c3342 | 171 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 172 | { |
726c3342 | 173 | struct super_block *sb = dentry->d_sb; |
c81156dd SF |
174 | int xid; |
175 | int rc = -EOPNOTSUPP; | |
1da177e4 LT |
176 | struct cifs_sb_info *cifs_sb; |
177 | struct cifsTconInfo *pTcon; | |
178 | ||
179 | xid = GetXid(); | |
180 | ||
181 | cifs_sb = CIFS_SB(sb); | |
182 | pTcon = cifs_sb->tcon; | |
183 | ||
184 | buf->f_type = CIFS_MAGIC_NUMBER; | |
185 | ||
186 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ | |
c81156dd SF |
187 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
188 | presumably be total path, but note | |
189 | that some servers (includinng Samba 3) | |
190 | have a shorter maximum path */ | |
1da177e4 LT |
191 | buf->f_files = 0; /* undefined */ |
192 | buf->f_ffree = 0; /* unlimited */ | |
193 | ||
1da177e4 | 194 | /* BB we could add a second check for a QFS Unix capability bit */ |
f28ac91b | 195 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
196 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
197 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 198 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
199 | |
200 | /* Only need to call the old QFSInfo if failed | |
201 | on newer one */ | |
202 | if(rc) | |
de7ed55d | 203 | if(pTcon->ses->capabilities & CAP_NT_SMBS) |
9ac00b7d | 204 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); /* not supported by OS2 */ |
1da177e4 | 205 | |
9ac00b7d SF |
206 | /* Some old Windows servers also do not support level 103, retry with |
207 | older level one if old server failed the previous call or we | |
208 | bypassed it because we detected that this was an older LANMAN sess */ | |
20962438 SF |
209 | if(rc) |
210 | rc = SMBOldQFSInfo(xid, pTcon, buf); | |
1da177e4 LT |
211 | /* |
212 | int f_type; | |
213 | __fsid_t f_fsid; | |
214 | int f_namelen; */ | |
c81156dd | 215 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 216 | FreeXid(xid); |
c81156dd SF |
217 | return 0; /* always return success? what if volume is no |
218 | longer available? */ | |
1da177e4 LT |
219 | } |
220 | ||
221 | static int cifs_permission(struct inode * inode, int mask, struct nameidata *nd) | |
222 | { | |
223 | struct cifs_sb_info *cifs_sb; | |
224 | ||
225 | cifs_sb = CIFS_SB(inode->i_sb); | |
226 | ||
227 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { | |
228 | return 0; | |
229 | } else /* file mode might have been restricted at mount time | |
230 | on the client (above and beyond ACL on servers) for | |
231 | servers which do not support setting and viewing mode bits, | |
232 | so allowing client to check permissions is useful */ | |
233 | return generic_permission(inode, mask, NULL); | |
234 | } | |
235 | ||
e18b890b CL |
236 | static struct kmem_cache *cifs_inode_cachep; |
237 | static struct kmem_cache *cifs_req_cachep; | |
238 | static struct kmem_cache *cifs_mid_cachep; | |
239 | struct kmem_cache *cifs_oplock_cachep; | |
240 | static struct kmem_cache *cifs_sm_req_cachep; | |
1da177e4 LT |
241 | mempool_t *cifs_sm_req_poolp; |
242 | mempool_t *cifs_req_poolp; | |
243 | mempool_t *cifs_mid_poolp; | |
244 | ||
245 | static struct inode * | |
246 | cifs_alloc_inode(struct super_block *sb) | |
247 | { | |
248 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 249 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
250 | if (!cifs_inode) |
251 | return NULL; | |
252 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
253 | atomic_set(&cifs_inode->inUse, 0); | |
254 | cifs_inode->time = 0; | |
255 | /* Until the file is open and we have gotten oplock | |
256 | info back from the server, can not assume caching of | |
257 | file data or metadata */ | |
258 | cifs_inode->clientCanCacheRead = FALSE; | |
259 | cifs_inode->clientCanCacheAll = FALSE; | |
1da177e4 | 260 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
e30dcf3a | 261 | cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; |
1da177e4 LT |
262 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
263 | return &cifs_inode->vfs_inode; | |
264 | } | |
265 | ||
266 | static void | |
267 | cifs_destroy_inode(struct inode *inode) | |
268 | { | |
269 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
270 | } | |
271 | ||
272 | /* | |
273 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
274 | * Not all settable options are displayed but most of the important | |
275 | * ones are. | |
276 | */ | |
277 | static int | |
278 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
279 | { | |
280 | struct cifs_sb_info *cifs_sb; | |
281 | ||
282 | cifs_sb = CIFS_SB(m->mnt_sb); | |
283 | ||
284 | if (cifs_sb) { | |
285 | if (cifs_sb->tcon) { | |
286 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); | |
287 | if (cifs_sb->tcon->ses) { | |
288 | if (cifs_sb->tcon->ses->userName) | |
289 | seq_printf(s, ",username=%s", | |
290 | cifs_sb->tcon->ses->userName); | |
291 | if(cifs_sb->tcon->ses->domainName) | |
292 | seq_printf(s, ",domain=%s", | |
293 | cifs_sb->tcon->ses->domainName); | |
294 | } | |
295 | } | |
296 | seq_printf(s, ",rsize=%d",cifs_sb->rsize); | |
297 | seq_printf(s, ",wsize=%d",cifs_sb->wsize); | |
298 | } | |
299 | return 0; | |
300 | } | |
301 | ||
302 | #ifdef CONFIG_CIFS_QUOTA | |
303 | int cifs_xquota_set(struct super_block * sb, int quota_type, qid_t qid, | |
304 | struct fs_disk_quota * pdquota) | |
305 | { | |
306 | int xid; | |
307 | int rc = 0; | |
308 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
309 | struct cifsTconInfo *pTcon; | |
310 | ||
311 | if(cifs_sb) | |
312 | pTcon = cifs_sb->tcon; | |
313 | else | |
314 | return -EIO; | |
315 | ||
316 | ||
317 | xid = GetXid(); | |
318 | if(pTcon) { | |
319 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
320 | } else { | |
321 | return -EIO; | |
322 | } | |
323 | ||
324 | FreeXid(xid); | |
325 | return rc; | |
326 | } | |
327 | ||
328 | int cifs_xquota_get(struct super_block * sb, int quota_type, qid_t qid, | |
329 | struct fs_disk_quota * pdquota) | |
330 | { | |
331 | int xid; | |
332 | int rc = 0; | |
333 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
334 | struct cifsTconInfo *pTcon; | |
335 | ||
336 | if(cifs_sb) | |
337 | pTcon = cifs_sb->tcon; | |
338 | else | |
339 | return -EIO; | |
340 | ||
341 | xid = GetXid(); | |
342 | if(pTcon) { | |
343 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
344 | } else { | |
345 | rc = -EIO; | |
346 | } | |
347 | ||
348 | FreeXid(xid); | |
349 | return rc; | |
350 | } | |
351 | ||
352 | int cifs_xstate_set(struct super_block * sb, unsigned int flags, int operation) | |
353 | { | |
354 | int xid; | |
355 | int rc = 0; | |
356 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
357 | struct cifsTconInfo *pTcon; | |
358 | ||
359 | if(cifs_sb) | |
360 | pTcon = cifs_sb->tcon; | |
361 | else | |
362 | return -EIO; | |
363 | ||
364 | xid = GetXid(); | |
365 | if(pTcon) { | |
366 | cFYI(1,("flags: 0x%x operation: 0x%x",flags,operation)); | |
367 | } else { | |
368 | rc = -EIO; | |
369 | } | |
370 | ||
371 | FreeXid(xid); | |
372 | return rc; | |
373 | } | |
374 | ||
375 | int cifs_xstate_get(struct super_block * sb, struct fs_quota_stat *qstats) | |
376 | { | |
377 | int xid; | |
378 | int rc = 0; | |
379 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
380 | struct cifsTconInfo *pTcon; | |
381 | ||
382 | if(cifs_sb) { | |
383 | pTcon = cifs_sb->tcon; | |
384 | } else { | |
385 | return -EIO; | |
386 | } | |
387 | xid = GetXid(); | |
388 | if(pTcon) { | |
389 | cFYI(1,("pqstats %p",qstats)); | |
390 | } else { | |
391 | rc = -EIO; | |
392 | } | |
393 | ||
394 | FreeXid(xid); | |
395 | return rc; | |
396 | } | |
397 | ||
398 | static struct quotactl_ops cifs_quotactl_ops = { | |
399 | .set_xquota = cifs_xquota_set, | |
400 | .get_xquota = cifs_xquota_set, | |
401 | .set_xstate = cifs_xstate_set, | |
402 | .get_xstate = cifs_xstate_get, | |
403 | }; | |
404 | #endif | |
405 | ||
8b512d9a | 406 | static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags) |
68058e75 | 407 | { |
5e1253b5 | 408 | struct cifs_sb_info *cifs_sb; |
9e2e85f8 | 409 | struct cifsTconInfo * tcon; |
68058e75 | 410 | |
8b512d9a TM |
411 | if (!(flags & MNT_FORCE)) |
412 | return; | |
413 | cifs_sb = CIFS_SB(vfsmnt->mnt_sb); | |
5e1253b5 | 414 | if(cifs_sb == NULL) |
9e2e85f8 SF |
415 | return; |
416 | ||
417 | tcon = cifs_sb->tcon; | |
418 | if(tcon == NULL) | |
419 | return; | |
5e1253b5 SF |
420 | down(&tcon->tconSem); |
421 | if (atomic_read(&tcon->useCount) == 1) | |
422 | tcon->tidStatus = CifsExiting; | |
423 | up(&tcon->tconSem); | |
424 | ||
3a5ff61c | 425 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 426 | /* cancel_notify_requests(tcon); */ |
9e2e85f8 | 427 | if(tcon->ses && tcon->ses->server) |
5e1253b5 | 428 | { |
7b7abfe3 | 429 | cFYI(1,("wake up tasks now - umount begin not complete")); |
9e2e85f8 | 430 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
431 | wake_up_all(&tcon->ses->server->response_q); |
432 | msleep(1); /* yield */ | |
433 | /* we have to kick the requests once more */ | |
434 | wake_up_all(&tcon->ses->server->response_q); | |
435 | msleep(1); | |
5e1253b5 SF |
436 | } |
437 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
438 | |
439 | return; | |
440 | } | |
68058e75 | 441 | |
bf97d287 SF |
442 | #ifdef CONFIG_CIFS_STATS2 |
443 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
444 | { | |
445 | /* BB FIXME */ | |
446 | return 0; | |
447 | } | |
448 | #endif | |
449 | ||
1da177e4 LT |
450 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
451 | { | |
452 | *flags |= MS_NODIRATIME; | |
453 | return 0; | |
454 | } | |
455 | ||
2cd646a2 | 456 | static struct super_operations cifs_super_ops = { |
1da177e4 LT |
457 | .read_inode = cifs_read_inode, |
458 | .put_super = cifs_put_super, | |
459 | .statfs = cifs_statfs, | |
460 | .alloc_inode = cifs_alloc_inode, | |
461 | .destroy_inode = cifs_destroy_inode, | |
462 | /* .drop_inode = generic_delete_inode, | |
463 | .delete_inode = cifs_delete_inode, *//* Do not need the above two functions | |
464 | unless later we add lazy close of inodes or unless the kernel forgets to call | |
465 | us with the same number of releases (closes) as opens */ | |
466 | .show_options = cifs_show_options, | |
7b7abfe3 | 467 | .umount_begin = cifs_umount_begin, |
1da177e4 | 468 | .remount_fs = cifs_remount, |
bf97d287 | 469 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 470 | .show_stats = cifs_show_stats, |
bf97d287 | 471 | #endif |
1da177e4 LT |
472 | }; |
473 | ||
454e2398 | 474 | static int |
1da177e4 | 475 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 476 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
477 | { |
478 | int rc; | |
479 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
480 | ||
481 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
482 | ||
483 | if (IS_ERR(sb)) | |
454e2398 | 484 | return PTR_ERR(sb); |
1da177e4 LT |
485 | |
486 | sb->s_flags = flags; | |
487 | ||
9b04c997 | 488 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
489 | if (rc) { |
490 | up_write(&sb->s_umount); | |
491 | deactivate_super(sb); | |
454e2398 | 492 | return rc; |
1da177e4 LT |
493 | } |
494 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 495 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
496 | } |
497 | ||
027445c3 BP |
498 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
499 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 500 | { |
e6a00296 | 501 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
502 | ssize_t written; |
503 | ||
027445c3 | 504 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
505 | if (!CIFS_I(inode)->clientCanCacheAll) |
506 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
507 | return written; |
508 | } | |
509 | ||
c32a0b68 SF |
510 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
511 | { | |
512 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 513 | if (origin == SEEK_END) { |
e6a00296 | 514 | int retval = cifs_revalidate(file->f_path.dentry); |
c32a0b68 SF |
515 | if (retval < 0) |
516 | return (loff_t)retval; | |
517 | } | |
518 | return remote_llseek(file, offset, origin); | |
519 | } | |
520 | ||
1da177e4 LT |
521 | static struct file_system_type cifs_fs_type = { |
522 | .owner = THIS_MODULE, | |
523 | .name = "cifs", | |
524 | .get_sb = cifs_get_sb, | |
525 | .kill_sb = kill_anon_super, | |
526 | /* .fs_flags */ | |
527 | }; | |
528 | struct inode_operations cifs_dir_inode_ops = { | |
529 | .create = cifs_create, | |
530 | .lookup = cifs_lookup, | |
531 | .getattr = cifs_getattr, | |
532 | .unlink = cifs_unlink, | |
533 | .link = cifs_hardlink, | |
534 | .mkdir = cifs_mkdir, | |
535 | .rmdir = cifs_rmdir, | |
536 | .rename = cifs_rename, | |
537 | .permission = cifs_permission, | |
538 | /* revalidate:cifs_revalidate, */ | |
539 | .setattr = cifs_setattr, | |
540 | .symlink = cifs_symlink, | |
541 | .mknod = cifs_mknod, | |
542 | #ifdef CONFIG_CIFS_XATTR | |
543 | .setxattr = cifs_setxattr, | |
544 | .getxattr = cifs_getxattr, | |
545 | .listxattr = cifs_listxattr, | |
546 | .removexattr = cifs_removexattr, | |
547 | #endif | |
548 | }; | |
549 | ||
550 | struct inode_operations cifs_file_inode_ops = { | |
551 | /* revalidate:cifs_revalidate, */ | |
552 | .setattr = cifs_setattr, | |
553 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
554 | .rename = cifs_rename, | |
555 | .permission = cifs_permission, | |
556 | #ifdef CONFIG_CIFS_XATTR | |
557 | .setxattr = cifs_setxattr, | |
558 | .getxattr = cifs_getxattr, | |
559 | .listxattr = cifs_listxattr, | |
560 | .removexattr = cifs_removexattr, | |
561 | #endif | |
562 | }; | |
563 | ||
564 | struct inode_operations cifs_symlink_inode_ops = { | |
565 | .readlink = generic_readlink, | |
566 | .follow_link = cifs_follow_link, | |
567 | .put_link = cifs_put_link, | |
568 | .permission = cifs_permission, | |
569 | /* BB add the following two eventually */ | |
570 | /* revalidate: cifs_revalidate, | |
571 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
572 | #ifdef CONFIG_CIFS_XATTR | |
573 | .setxattr = cifs_setxattr, | |
574 | .getxattr = cifs_getxattr, | |
575 | .listxattr = cifs_listxattr, | |
576 | .removexattr = cifs_removexattr, | |
577 | #endif | |
578 | }; | |
579 | ||
4b6f5d20 | 580 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
581 | .read = do_sync_read, |
582 | .write = do_sync_write, | |
87c89dd7 SF |
583 | .aio_read = generic_file_aio_read, |
584 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
585 | .open = cifs_open, |
586 | .release = cifs_close, | |
587 | .lock = cifs_lock, | |
588 | .fsync = cifs_fsync, | |
589 | .flush = cifs_flush, | |
590 | .mmap = cifs_file_mmap, | |
591 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 592 | .llseek = cifs_llseek, |
c67593a0 SF |
593 | #ifdef CONFIG_CIFS_POSIX |
594 | .ioctl = cifs_ioctl, | |
595 | #endif /* CONFIG_CIFS_POSIX */ | |
596 | ||
1da177e4 | 597 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
598 | .dir_notify = cifs_dir_notify, |
599 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
600 | }; | |
601 | ||
4b6f5d20 | 602 | const struct file_operations cifs_file_direct_ops = { |
1da177e4 LT |
603 | /* no mmap, no aio, no readv - |
604 | BB reevaluate whether they can be done with directio, no cache */ | |
605 | .read = cifs_user_read, | |
606 | .write = cifs_user_write, | |
607 | .open = cifs_open, | |
608 | .release = cifs_close, | |
609 | .lock = cifs_lock, | |
610 | .fsync = cifs_fsync, | |
611 | .flush = cifs_flush, | |
612 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
c67593a0 SF |
613 | #ifdef CONFIG_CIFS_POSIX |
614 | .ioctl = cifs_ioctl, | |
615 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 616 | .llseek = cifs_llseek, |
1da177e4 LT |
617 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
618 | .dir_notify = cifs_dir_notify, | |
619 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
620 | }; | |
4b6f5d20 | 621 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
622 | .read = do_sync_read, |
623 | .write = do_sync_write, | |
87c89dd7 SF |
624 | .aio_read = generic_file_aio_read, |
625 | .aio_write = cifs_file_aio_write, | |
626 | .open = cifs_open, | |
627 | .release = cifs_close, | |
628 | .fsync = cifs_fsync, | |
629 | .flush = cifs_flush, | |
630 | .mmap = cifs_file_mmap, | |
631 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 632 | .llseek = cifs_llseek, |
8b94bcb9 | 633 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 634 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
635 | #endif /* CONFIG_CIFS_POSIX */ |
636 | ||
637 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 638 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
639 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
640 | }; | |
641 | ||
4b6f5d20 | 642 | const struct file_operations cifs_file_direct_nobrl_ops = { |
87c89dd7 SF |
643 | /* no mmap, no aio, no readv - |
644 | BB reevaluate whether they can be done with directio, no cache */ | |
645 | .read = cifs_user_read, | |
646 | .write = cifs_user_write, | |
647 | .open = cifs_open, | |
648 | .release = cifs_close, | |
649 | .fsync = cifs_fsync, | |
650 | .flush = cifs_flush, | |
651 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
8b94bcb9 | 652 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 653 | .ioctl = cifs_ioctl, |
8b94bcb9 | 654 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 655 | .llseek = cifs_llseek, |
8b94bcb9 | 656 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 657 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
658 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
659 | }; | |
1da177e4 | 660 | |
4b6f5d20 | 661 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
662 | .readdir = cifs_readdir, |
663 | .release = cifs_closedir, | |
664 | .read = generic_read_dir, | |
665 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
666 | .dir_notify = cifs_dir_notify, | |
667 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
f28ac91b | 668 | .ioctl = cifs_ioctl, |
1da177e4 LT |
669 | }; |
670 | ||
671 | static void | |
e18b890b | 672 | cifs_init_once(void *inode, struct kmem_cache * cachep, unsigned long flags) |
1da177e4 LT |
673 | { |
674 | struct cifsInodeInfo *cifsi = inode; | |
675 | ||
676 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | |
677 | SLAB_CTOR_CONSTRUCTOR) { | |
678 | inode_init_once(&cifsi->vfs_inode); | |
679 | INIT_LIST_HEAD(&cifsi->lockList); | |
680 | } | |
681 | } | |
682 | ||
683 | static int | |
684 | cifs_init_inodecache(void) | |
685 | { | |
686 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
687 | sizeof (struct cifsInodeInfo), | |
fffb60f9 PJ |
688 | 0, (SLAB_RECLAIM_ACCOUNT| |
689 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
690 | cifs_init_once, NULL); |
691 | if (cifs_inode_cachep == NULL) | |
692 | return -ENOMEM; | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | static void | |
698 | cifs_destroy_inodecache(void) | |
699 | { | |
1a1d92c1 | 700 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
701 | } |
702 | ||
703 | static int | |
704 | cifs_init_request_bufs(void) | |
705 | { | |
706 | if(CIFSMaxBufSize < 8192) { | |
707 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum | |
708 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
709 | CIFSMaxBufSize = 8192; | |
710 | } else if (CIFSMaxBufSize > 1024*127) { | |
711 | CIFSMaxBufSize = 1024 * 127; | |
712 | } else { | |
713 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
714 | } | |
715 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
716 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
717 | CIFSMaxBufSize + | |
718 | MAX_CIFS_HDR_SIZE, 0, | |
719 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
720 | if (cifs_req_cachep == NULL) | |
721 | return -ENOMEM; | |
722 | ||
723 | if(cifs_min_rcv < 1) | |
724 | cifs_min_rcv = 1; | |
725 | else if (cifs_min_rcv > 64) { | |
726 | cifs_min_rcv = 64; | |
727 | cERROR(1,("cifs_min_rcv set to maximum (64)")); | |
728 | } | |
729 | ||
93d2341c MD |
730 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
731 | cifs_req_cachep); | |
1da177e4 LT |
732 | |
733 | if(cifs_req_poolp == NULL) { | |
734 | kmem_cache_destroy(cifs_req_cachep); | |
735 | return -ENOMEM; | |
736 | } | |
ec637e3f | 737 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
738 | almost all handle based requests (but not write response, nor is it |
739 | sufficient for path based requests). A smaller size would have | |
740 | been more efficient (compacting multiple slab items on one 4k page) | |
741 | for the case in which debug was on, but this larger size allows | |
742 | more SMBs to use small buffer alloc and is still much more | |
743 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
744 | alloc of large cifs buffers even when page debugging is on */ | |
745 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
ec637e3f SF |
746 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
747 | NULL, NULL); | |
1da177e4 LT |
748 | if (cifs_sm_req_cachep == NULL) { |
749 | mempool_destroy(cifs_req_poolp); | |
750 | kmem_cache_destroy(cifs_req_cachep); | |
751 | return -ENOMEM; | |
752 | } | |
753 | ||
754 | if(cifs_min_small < 2) | |
755 | cifs_min_small = 2; | |
756 | else if (cifs_min_small > 256) { | |
757 | cifs_min_small = 256; | |
758 | cFYI(1,("cifs_min_small set to maximum (256)")); | |
759 | } | |
760 | ||
93d2341c MD |
761 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
762 | cifs_sm_req_cachep); | |
1da177e4 LT |
763 | |
764 | if(cifs_sm_req_poolp == NULL) { | |
765 | mempool_destroy(cifs_req_poolp); | |
766 | kmem_cache_destroy(cifs_req_cachep); | |
767 | kmem_cache_destroy(cifs_sm_req_cachep); | |
768 | return -ENOMEM; | |
769 | } | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | static void | |
775 | cifs_destroy_request_bufs(void) | |
776 | { | |
777 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 778 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 779 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 780 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
781 | } |
782 | ||
783 | static int | |
784 | cifs_init_mids(void) | |
785 | { | |
786 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
787 | sizeof (struct mid_q_entry), 0, | |
788 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
789 | if (cifs_mid_cachep == NULL) | |
790 | return -ENOMEM; | |
791 | ||
93d2341c MD |
792 | /* 3 is a reasonable minimum number of simultaneous operations */ |
793 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
1da177e4 LT |
794 | if(cifs_mid_poolp == NULL) { |
795 | kmem_cache_destroy(cifs_mid_cachep); | |
796 | return -ENOMEM; | |
797 | } | |
798 | ||
799 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
800 | sizeof (struct oplock_q_entry), 0, | |
801 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
802 | if (cifs_oplock_cachep == NULL) { | |
803 | kmem_cache_destroy(cifs_mid_cachep); | |
804 | mempool_destroy(cifs_mid_poolp); | |
805 | return -ENOMEM; | |
806 | } | |
807 | ||
808 | return 0; | |
809 | } | |
810 | ||
811 | static void | |
812 | cifs_destroy_mids(void) | |
813 | { | |
814 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
815 | kmem_cache_destroy(cifs_mid_cachep); |
816 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
817 | } |
818 | ||
819 | static int cifs_oplock_thread(void * dummyarg) | |
820 | { | |
821 | struct oplock_q_entry * oplock_item; | |
822 | struct cifsTconInfo *pTcon; | |
823 | struct inode * inode; | |
824 | __u16 netfid; | |
825 | int rc; | |
826 | ||
1da177e4 | 827 | do { |
ede1327e SF |
828 | if (try_to_freeze()) |
829 | continue; | |
1da177e4 | 830 | |
1da177e4 LT |
831 | spin_lock(&GlobalMid_Lock); |
832 | if(list_empty(&GlobalOplock_Q)) { | |
833 | spin_unlock(&GlobalMid_Lock); | |
834 | set_current_state(TASK_INTERRUPTIBLE); | |
835 | schedule_timeout(39*HZ); | |
836 | } else { | |
837 | oplock_item = list_entry(GlobalOplock_Q.next, | |
838 | struct oplock_q_entry, qhead); | |
839 | if(oplock_item) { | |
840 | cFYI(1,("found oplock item to write out")); | |
841 | pTcon = oplock_item->tcon; | |
842 | inode = oplock_item->pinode; | |
843 | netfid = oplock_item->netfid; | |
844 | spin_unlock(&GlobalMid_Lock); | |
845 | DeleteOplockQEntry(oplock_item); | |
846 | /* can not grab inode sem here since it would | |
847 | deadlock when oplock received on delete | |
1b1dcc1b | 848 | since vfs_unlink holds the i_mutex across |
1da177e4 | 849 | the call */ |
1b1dcc1b | 850 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 LT |
851 | if (S_ISREG(inode->i_mode)) { |
852 | rc = filemap_fdatawrite(inode->i_mapping); | |
853 | if(CIFS_I(inode)->clientCanCacheRead == 0) { | |
854 | filemap_fdatawait(inode->i_mapping); | |
855 | invalidate_remote_inode(inode); | |
856 | } | |
857 | } else | |
858 | rc = 0; | |
1b1dcc1b | 859 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
860 | if (rc) |
861 | CIFS_I(inode)->write_behind_rc = rc; | |
862 | cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); | |
863 | ||
864 | /* releasing a stale oplock after recent reconnection | |
865 | of smb session using a now incorrect file | |
866 | handle is not a data integrity issue but do | |
867 | not bother sending an oplock release if session | |
868 | to server still is disconnected since oplock | |
869 | already released by the server in that case */ | |
870 | if(pTcon->tidStatus != CifsNeedReconnect) { | |
871 | rc = CIFSSMBLock(0, pTcon, netfid, | |
872 | 0 /* len */ , 0 /* offset */, 0, | |
873 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
874 | 0 /* wait flag */); | |
875 | cFYI(1,("Oplock release rc = %d ",rc)); | |
876 | } | |
877 | } else | |
878 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
879 | set_current_state(TASK_INTERRUPTIBLE); |
880 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 881 | } |
45af7a0f SF |
882 | } while (!kthread_should_stop()); |
883 | ||
884 | return 0; | |
1da177e4 LT |
885 | } |
886 | ||
8d0d5094 SF |
887 | static int cifs_dnotify_thread(void * dummyarg) |
888 | { | |
6ab16d24 SF |
889 | struct list_head *tmp; |
890 | struct cifsSesInfo *ses; | |
891 | ||
8d0d5094 | 892 | do { |
0fd1ffe0 | 893 | if (try_to_freeze()) |
16abbecd | 894 | continue; |
8d0d5094 | 895 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
896 | schedule_timeout(15*HZ); |
897 | read_lock(&GlobalSMBSeslock); | |
898 | /* check if any stuck requests that need | |
899 | to be woken up and wakeq so the | |
900 | thread can wake up and error out */ | |
901 | list_for_each(tmp, &GlobalSMBSessionList) { | |
902 | ses = list_entry(tmp, struct cifsSesInfo, | |
903 | cifsSessionList); | |
904 | if(ses && ses->server && | |
2a138ebb | 905 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
906 | wake_up_all(&ses->server->response_q); |
907 | } | |
908 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
909 | } while (!kthread_should_stop()); |
910 | ||
911 | return 0; | |
1da177e4 LT |
912 | } |
913 | ||
914 | static int __init | |
915 | init_cifs(void) | |
916 | { | |
917 | int rc = 0; | |
918 | #ifdef CONFIG_PROC_FS | |
919 | cifs_proc_init(); | |
920 | #endif | |
2cd646a2 | 921 | /* INIT_LIST_HEAD(&GlobalServerList);*/ /* BB not implemented yet */ |
1da177e4 LT |
922 | INIT_LIST_HEAD(&GlobalSMBSessionList); |
923 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
924 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
925 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
926 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
927 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
928 | #endif | |
1da177e4 LT |
929 | /* |
930 | * Initialize Global counters | |
931 | */ | |
932 | atomic_set(&sesInfoAllocCount, 0); | |
933 | atomic_set(&tconInfoAllocCount, 0); | |
934 | atomic_set(&tcpSesAllocCount,0); | |
935 | atomic_set(&tcpSesReconnectCount, 0); | |
936 | atomic_set(&tconInfoReconnectCount, 0); | |
937 | ||
938 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
939 | atomic_set(&smBufAllocCount, 0); |
940 | #ifdef CONFIG_CIFS_STATS2 | |
941 | atomic_set(&totBufAllocCount, 0); | |
942 | atomic_set(&totSmBufAllocCount, 0); | |
943 | #endif /* CONFIG_CIFS_STATS2 */ | |
944 | ||
1da177e4 LT |
945 | atomic_set(&midCount, 0); |
946 | GlobalCurrentXid = 0; | |
947 | GlobalTotalActiveXid = 0; | |
948 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 949 | memset(Local_System_Name, 0, 15); |
1da177e4 LT |
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) |