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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 | ||
192 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
193 | /* BB we could add a second check for a QFS Unix capability bit */ | |
f28ac91b | 194 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
195 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
196 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 197 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
198 | |
199 | /* Only need to call the old QFSInfo if failed | |
200 | on newer one */ | |
201 | if(rc) | |
202 | #endif /* CIFS_EXPERIMENTAL */ | |
737b758c | 203 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); |
1da177e4 | 204 | |
20962438 SF |
205 | /* Old Windows servers do not support level 103, retry with level |
206 | one if old server failed the previous call */ | |
207 | if(rc) | |
208 | rc = SMBOldQFSInfo(xid, pTcon, buf); | |
1da177e4 LT |
209 | /* |
210 | int f_type; | |
211 | __fsid_t f_fsid; | |
212 | int f_namelen; */ | |
c81156dd | 213 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 214 | FreeXid(xid); |
c81156dd SF |
215 | return 0; /* always return success? what if volume is no |
216 | longer available? */ | |
1da177e4 LT |
217 | } |
218 | ||
219 | static int cifs_permission(struct inode * inode, int mask, struct nameidata *nd) | |
220 | { | |
221 | struct cifs_sb_info *cifs_sb; | |
222 | ||
223 | cifs_sb = CIFS_SB(inode->i_sb); | |
224 | ||
225 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { | |
226 | return 0; | |
227 | } else /* file mode might have been restricted at mount time | |
228 | on the client (above and beyond ACL on servers) for | |
229 | servers which do not support setting and viewing mode bits, | |
230 | so allowing client to check permissions is useful */ | |
231 | return generic_permission(inode, mask, NULL); | |
232 | } | |
233 | ||
234 | static kmem_cache_t *cifs_inode_cachep; | |
235 | static kmem_cache_t *cifs_req_cachep; | |
236 | static kmem_cache_t *cifs_mid_cachep; | |
237 | kmem_cache_t *cifs_oplock_cachep; | |
238 | static kmem_cache_t *cifs_sm_req_cachep; | |
239 | mempool_t *cifs_sm_req_poolp; | |
240 | mempool_t *cifs_req_poolp; | |
241 | mempool_t *cifs_mid_poolp; | |
242 | ||
243 | static struct inode * | |
244 | cifs_alloc_inode(struct super_block *sb) | |
245 | { | |
246 | struct cifsInodeInfo *cifs_inode; | |
247 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, SLAB_KERNEL); | |
248 | if (!cifs_inode) | |
249 | return NULL; | |
250 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
251 | atomic_set(&cifs_inode->inUse, 0); | |
252 | cifs_inode->time = 0; | |
253 | /* Until the file is open and we have gotten oplock | |
254 | info back from the server, can not assume caching of | |
255 | file data or metadata */ | |
256 | cifs_inode->clientCanCacheRead = FALSE; | |
257 | cifs_inode->clientCanCacheAll = FALSE; | |
258 | cifs_inode->vfs_inode.i_blksize = CIFS_MAX_MSGSIZE; | |
259 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ | |
e30dcf3a | 260 | cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; |
1da177e4 LT |
261 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
262 | return &cifs_inode->vfs_inode; | |
263 | } | |
264 | ||
265 | static void | |
266 | cifs_destroy_inode(struct inode *inode) | |
267 | { | |
268 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
269 | } | |
270 | ||
271 | /* | |
272 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
273 | * Not all settable options are displayed but most of the important | |
274 | * ones are. | |
275 | */ | |
276 | static int | |
277 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
278 | { | |
279 | struct cifs_sb_info *cifs_sb; | |
280 | ||
281 | cifs_sb = CIFS_SB(m->mnt_sb); | |
282 | ||
283 | if (cifs_sb) { | |
284 | if (cifs_sb->tcon) { | |
285 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); | |
286 | if (cifs_sb->tcon->ses) { | |
287 | if (cifs_sb->tcon->ses->userName) | |
288 | seq_printf(s, ",username=%s", | |
289 | cifs_sb->tcon->ses->userName); | |
290 | if(cifs_sb->tcon->ses->domainName) | |
291 | seq_printf(s, ",domain=%s", | |
292 | cifs_sb->tcon->ses->domainName); | |
293 | } | |
294 | } | |
295 | seq_printf(s, ",rsize=%d",cifs_sb->rsize); | |
296 | seq_printf(s, ",wsize=%d",cifs_sb->wsize); | |
297 | } | |
298 | return 0; | |
299 | } | |
300 | ||
301 | #ifdef CONFIG_CIFS_QUOTA | |
302 | int cifs_xquota_set(struct super_block * sb, int quota_type, qid_t qid, | |
303 | struct fs_disk_quota * pdquota) | |
304 | { | |
305 | int xid; | |
306 | int rc = 0; | |
307 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
308 | struct cifsTconInfo *pTcon; | |
309 | ||
310 | if(cifs_sb) | |
311 | pTcon = cifs_sb->tcon; | |
312 | else | |
313 | return -EIO; | |
314 | ||
315 | ||
316 | xid = GetXid(); | |
317 | if(pTcon) { | |
318 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
319 | } else { | |
320 | return -EIO; | |
321 | } | |
322 | ||
323 | FreeXid(xid); | |
324 | return rc; | |
325 | } | |
326 | ||
327 | int cifs_xquota_get(struct super_block * sb, int quota_type, qid_t qid, | |
328 | struct fs_disk_quota * pdquota) | |
329 | { | |
330 | int xid; | |
331 | int rc = 0; | |
332 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
333 | struct cifsTconInfo *pTcon; | |
334 | ||
335 | if(cifs_sb) | |
336 | pTcon = cifs_sb->tcon; | |
337 | else | |
338 | return -EIO; | |
339 | ||
340 | xid = GetXid(); | |
341 | if(pTcon) { | |
342 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
343 | } else { | |
344 | rc = -EIO; | |
345 | } | |
346 | ||
347 | FreeXid(xid); | |
348 | return rc; | |
349 | } | |
350 | ||
351 | int cifs_xstate_set(struct super_block * sb, unsigned int flags, int operation) | |
352 | { | |
353 | int xid; | |
354 | int rc = 0; | |
355 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
356 | struct cifsTconInfo *pTcon; | |
357 | ||
358 | if(cifs_sb) | |
359 | pTcon = cifs_sb->tcon; | |
360 | else | |
361 | return -EIO; | |
362 | ||
363 | xid = GetXid(); | |
364 | if(pTcon) { | |
365 | cFYI(1,("flags: 0x%x operation: 0x%x",flags,operation)); | |
366 | } else { | |
367 | rc = -EIO; | |
368 | } | |
369 | ||
370 | FreeXid(xid); | |
371 | return rc; | |
372 | } | |
373 | ||
374 | int cifs_xstate_get(struct super_block * sb, struct fs_quota_stat *qstats) | |
375 | { | |
376 | int xid; | |
377 | int rc = 0; | |
378 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
379 | struct cifsTconInfo *pTcon; | |
380 | ||
381 | if(cifs_sb) { | |
382 | pTcon = cifs_sb->tcon; | |
383 | } else { | |
384 | return -EIO; | |
385 | } | |
386 | xid = GetXid(); | |
387 | if(pTcon) { | |
388 | cFYI(1,("pqstats %p",qstats)); | |
389 | } else { | |
390 | rc = -EIO; | |
391 | } | |
392 | ||
393 | FreeXid(xid); | |
394 | return rc; | |
395 | } | |
396 | ||
397 | static struct quotactl_ops cifs_quotactl_ops = { | |
398 | .set_xquota = cifs_xquota_set, | |
399 | .get_xquota = cifs_xquota_set, | |
400 | .set_xstate = cifs_xstate_set, | |
401 | .get_xstate = cifs_xstate_get, | |
402 | }; | |
403 | #endif | |
404 | ||
7b7abfe3 | 405 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
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 | ||
7b7abfe3 SF |
425 | /* cancel_brl_requests(tcon); */ |
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 | } | |
7b7abfe3 | 441 | #endif |
68058e75 | 442 | |
1da177e4 LT |
443 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
444 | { | |
445 | *flags |= MS_NODIRATIME; | |
446 | return 0; | |
447 | } | |
448 | ||
449 | struct super_operations cifs_super_ops = { | |
450 | .read_inode = cifs_read_inode, | |
451 | .put_super = cifs_put_super, | |
452 | .statfs = cifs_statfs, | |
453 | .alloc_inode = cifs_alloc_inode, | |
454 | .destroy_inode = cifs_destroy_inode, | |
455 | /* .drop_inode = generic_delete_inode, | |
456 | .delete_inode = cifs_delete_inode, *//* Do not need the above two functions | |
457 | unless later we add lazy close of inodes or unless the kernel forgets to call | |
458 | us with the same number of releases (closes) as opens */ | |
459 | .show_options = cifs_show_options, | |
7b7abfe3 SF |
460 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
461 | .umount_begin = cifs_umount_begin, | |
462 | #endif | |
1da177e4 LT |
463 | .remount_fs = cifs_remount, |
464 | }; | |
465 | ||
454e2398 | 466 | static int |
1da177e4 | 467 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 468 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
469 | { |
470 | int rc; | |
471 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
472 | ||
473 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
474 | ||
475 | if (IS_ERR(sb)) | |
454e2398 | 476 | return PTR_ERR(sb); |
1da177e4 LT |
477 | |
478 | sb->s_flags = flags; | |
479 | ||
9b04c997 | 480 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
481 | if (rc) { |
482 | up_write(&sb->s_umount); | |
483 | deactivate_super(sb); | |
454e2398 | 484 | return rc; |
1da177e4 LT |
485 | } |
486 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 487 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
488 | } |
489 | ||
87c89dd7 SF |
490 | static ssize_t cifs_file_writev(struct file *file, const struct iovec *iov, |
491 | unsigned long nr_segs, loff_t *ppos) | |
1da177e4 | 492 | { |
87c89dd7 SF |
493 | struct inode *inode = file->f_dentry->d_inode; |
494 | ssize_t written; | |
1da177e4 | 495 | |
87c89dd7 SF |
496 | written = generic_file_writev(file, iov, nr_segs, ppos); |
497 | if (!CIFS_I(inode)->clientCanCacheAll) | |
498 | filemap_fdatawrite(inode->i_mapping); | |
499 | return written; | |
1da177e4 LT |
500 | } |
501 | ||
87c89dd7 SF |
502 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf, |
503 | size_t count, loff_t pos) | |
1da177e4 | 504 | { |
87c89dd7 | 505 | struct inode *inode = iocb->ki_filp->f_dentry->d_inode; |
1da177e4 LT |
506 | ssize_t written; |
507 | ||
87c89dd7 SF |
508 | written = generic_file_aio_write(iocb, buf, count, pos); |
509 | if (!CIFS_I(inode)->clientCanCacheAll) | |
510 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
511 | return written; |
512 | } | |
513 | ||
c32a0b68 SF |
514 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
515 | { | |
516 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
517 | if (origin == 2) { | |
518 | int retval = cifs_revalidate(file->f_dentry); | |
519 | if (retval < 0) | |
520 | return (loff_t)retval; | |
521 | } | |
522 | return remote_llseek(file, offset, origin); | |
523 | } | |
524 | ||
1da177e4 LT |
525 | static struct file_system_type cifs_fs_type = { |
526 | .owner = THIS_MODULE, | |
527 | .name = "cifs", | |
528 | .get_sb = cifs_get_sb, | |
529 | .kill_sb = kill_anon_super, | |
530 | /* .fs_flags */ | |
531 | }; | |
532 | struct inode_operations cifs_dir_inode_ops = { | |
533 | .create = cifs_create, | |
534 | .lookup = cifs_lookup, | |
535 | .getattr = cifs_getattr, | |
536 | .unlink = cifs_unlink, | |
537 | .link = cifs_hardlink, | |
538 | .mkdir = cifs_mkdir, | |
539 | .rmdir = cifs_rmdir, | |
540 | .rename = cifs_rename, | |
541 | .permission = cifs_permission, | |
542 | /* revalidate:cifs_revalidate, */ | |
543 | .setattr = cifs_setattr, | |
544 | .symlink = cifs_symlink, | |
545 | .mknod = cifs_mknod, | |
546 | #ifdef CONFIG_CIFS_XATTR | |
547 | .setxattr = cifs_setxattr, | |
548 | .getxattr = cifs_getxattr, | |
549 | .listxattr = cifs_listxattr, | |
550 | .removexattr = cifs_removexattr, | |
551 | #endif | |
552 | }; | |
553 | ||
554 | struct inode_operations cifs_file_inode_ops = { | |
555 | /* revalidate:cifs_revalidate, */ | |
556 | .setattr = cifs_setattr, | |
557 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
558 | .rename = cifs_rename, | |
559 | .permission = cifs_permission, | |
560 | #ifdef CONFIG_CIFS_XATTR | |
561 | .setxattr = cifs_setxattr, | |
562 | .getxattr = cifs_getxattr, | |
563 | .listxattr = cifs_listxattr, | |
564 | .removexattr = cifs_removexattr, | |
565 | #endif | |
566 | }; | |
567 | ||
568 | struct inode_operations cifs_symlink_inode_ops = { | |
569 | .readlink = generic_readlink, | |
570 | .follow_link = cifs_follow_link, | |
571 | .put_link = cifs_put_link, | |
572 | .permission = cifs_permission, | |
573 | /* BB add the following two eventually */ | |
574 | /* revalidate: cifs_revalidate, | |
575 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
576 | #ifdef CONFIG_CIFS_XATTR | |
577 | .setxattr = cifs_setxattr, | |
578 | .getxattr = cifs_getxattr, | |
579 | .listxattr = cifs_listxattr, | |
580 | .removexattr = cifs_removexattr, | |
581 | #endif | |
582 | }; | |
583 | ||
4b6f5d20 | 584 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
585 | .read = do_sync_read, |
586 | .write = do_sync_write, | |
587 | .readv = generic_file_readv, | |
588 | .writev = cifs_file_writev, | |
589 | .aio_read = generic_file_aio_read, | |
590 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
591 | .open = cifs_open, |
592 | .release = cifs_close, | |
593 | .lock = cifs_lock, | |
594 | .fsync = cifs_fsync, | |
595 | .flush = cifs_flush, | |
596 | .mmap = cifs_file_mmap, | |
597 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 598 | .llseek = cifs_llseek, |
c67593a0 SF |
599 | #ifdef CONFIG_CIFS_POSIX |
600 | .ioctl = cifs_ioctl, | |
601 | #endif /* CONFIG_CIFS_POSIX */ | |
602 | ||
1da177e4 | 603 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
604 | .dir_notify = cifs_dir_notify, |
605 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
606 | }; | |
607 | ||
4b6f5d20 | 608 | const struct file_operations cifs_file_direct_ops = { |
1da177e4 LT |
609 | /* no mmap, no aio, no readv - |
610 | BB reevaluate whether they can be done with directio, no cache */ | |
611 | .read = cifs_user_read, | |
612 | .write = cifs_user_write, | |
613 | .open = cifs_open, | |
614 | .release = cifs_close, | |
615 | .lock = cifs_lock, | |
616 | .fsync = cifs_fsync, | |
617 | .flush = cifs_flush, | |
618 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
c67593a0 SF |
619 | #ifdef CONFIG_CIFS_POSIX |
620 | .ioctl = cifs_ioctl, | |
621 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 622 | .llseek = cifs_llseek, |
1da177e4 LT |
623 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
624 | .dir_notify = cifs_dir_notify, | |
625 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
626 | }; | |
4b6f5d20 | 627 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
628 | .read = do_sync_read, |
629 | .write = do_sync_write, | |
630 | .readv = generic_file_readv, | |
631 | .writev = cifs_file_writev, | |
632 | .aio_read = generic_file_aio_read, | |
633 | .aio_write = cifs_file_aio_write, | |
634 | .open = cifs_open, | |
635 | .release = cifs_close, | |
636 | .fsync = cifs_fsync, | |
637 | .flush = cifs_flush, | |
638 | .mmap = cifs_file_mmap, | |
639 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 640 | .llseek = cifs_llseek, |
8b94bcb9 | 641 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 642 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
643 | #endif /* CONFIG_CIFS_POSIX */ |
644 | ||
645 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 646 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
647 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
648 | }; | |
649 | ||
4b6f5d20 | 650 | const struct file_operations cifs_file_direct_nobrl_ops = { |
87c89dd7 SF |
651 | /* no mmap, no aio, no readv - |
652 | BB reevaluate whether they can be done with directio, no cache */ | |
653 | .read = cifs_user_read, | |
654 | .write = cifs_user_write, | |
655 | .open = cifs_open, | |
656 | .release = cifs_close, | |
657 | .fsync = cifs_fsync, | |
658 | .flush = cifs_flush, | |
659 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
8b94bcb9 | 660 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 661 | .ioctl = cifs_ioctl, |
8b94bcb9 | 662 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 663 | .llseek = cifs_llseek, |
8b94bcb9 | 664 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 665 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
666 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
667 | }; | |
1da177e4 | 668 | |
4b6f5d20 | 669 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
670 | .readdir = cifs_readdir, |
671 | .release = cifs_closedir, | |
672 | .read = generic_read_dir, | |
673 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
674 | .dir_notify = cifs_dir_notify, | |
675 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
f28ac91b | 676 | .ioctl = cifs_ioctl, |
1da177e4 LT |
677 | }; |
678 | ||
679 | static void | |
680 | cifs_init_once(void *inode, kmem_cache_t * cachep, unsigned long flags) | |
681 | { | |
682 | struct cifsInodeInfo *cifsi = inode; | |
683 | ||
684 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | |
685 | SLAB_CTOR_CONSTRUCTOR) { | |
686 | inode_init_once(&cifsi->vfs_inode); | |
687 | INIT_LIST_HEAD(&cifsi->lockList); | |
688 | } | |
689 | } | |
690 | ||
691 | static int | |
692 | cifs_init_inodecache(void) | |
693 | { | |
694 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
695 | sizeof (struct cifsInodeInfo), | |
fffb60f9 PJ |
696 | 0, (SLAB_RECLAIM_ACCOUNT| |
697 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
698 | cifs_init_once, NULL); |
699 | if (cifs_inode_cachep == NULL) | |
700 | return -ENOMEM; | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | static void | |
706 | cifs_destroy_inodecache(void) | |
707 | { | |
708 | if (kmem_cache_destroy(cifs_inode_cachep)) | |
709 | printk(KERN_WARNING "cifs_inode_cache: error freeing\n"); | |
710 | } | |
711 | ||
712 | static int | |
713 | cifs_init_request_bufs(void) | |
714 | { | |
715 | if(CIFSMaxBufSize < 8192) { | |
716 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum | |
717 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
718 | CIFSMaxBufSize = 8192; | |
719 | } else if (CIFSMaxBufSize > 1024*127) { | |
720 | CIFSMaxBufSize = 1024 * 127; | |
721 | } else { | |
722 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
723 | } | |
724 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
725 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
726 | CIFSMaxBufSize + | |
727 | MAX_CIFS_HDR_SIZE, 0, | |
728 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
729 | if (cifs_req_cachep == NULL) | |
730 | return -ENOMEM; | |
731 | ||
732 | if(cifs_min_rcv < 1) | |
733 | cifs_min_rcv = 1; | |
734 | else if (cifs_min_rcv > 64) { | |
735 | cifs_min_rcv = 64; | |
736 | cERROR(1,("cifs_min_rcv set to maximum (64)")); | |
737 | } | |
738 | ||
93d2341c MD |
739 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
740 | cifs_req_cachep); | |
1da177e4 LT |
741 | |
742 | if(cifs_req_poolp == NULL) { | |
743 | kmem_cache_destroy(cifs_req_cachep); | |
744 | return -ENOMEM; | |
745 | } | |
ec637e3f | 746 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
747 | almost all handle based requests (but not write response, nor is it |
748 | sufficient for path based requests). A smaller size would have | |
749 | been more efficient (compacting multiple slab items on one 4k page) | |
750 | for the case in which debug was on, but this larger size allows | |
751 | more SMBs to use small buffer alloc and is still much more | |
752 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
753 | alloc of large cifs buffers even when page debugging is on */ | |
754 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
ec637e3f SF |
755 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
756 | NULL, NULL); | |
1da177e4 LT |
757 | if (cifs_sm_req_cachep == NULL) { |
758 | mempool_destroy(cifs_req_poolp); | |
759 | kmem_cache_destroy(cifs_req_cachep); | |
760 | return -ENOMEM; | |
761 | } | |
762 | ||
763 | if(cifs_min_small < 2) | |
764 | cifs_min_small = 2; | |
765 | else if (cifs_min_small > 256) { | |
766 | cifs_min_small = 256; | |
767 | cFYI(1,("cifs_min_small set to maximum (256)")); | |
768 | } | |
769 | ||
93d2341c MD |
770 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
771 | cifs_sm_req_cachep); | |
1da177e4 LT |
772 | |
773 | if(cifs_sm_req_poolp == NULL) { | |
774 | mempool_destroy(cifs_req_poolp); | |
775 | kmem_cache_destroy(cifs_req_cachep); | |
776 | kmem_cache_destroy(cifs_sm_req_cachep); | |
777 | return -ENOMEM; | |
778 | } | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | static void | |
784 | cifs_destroy_request_bufs(void) | |
785 | { | |
786 | mempool_destroy(cifs_req_poolp); | |
787 | if (kmem_cache_destroy(cifs_req_cachep)) | |
788 | printk(KERN_WARNING | |
789 | "cifs_destroy_request_cache: error not all structures were freed\n"); | |
790 | mempool_destroy(cifs_sm_req_poolp); | |
791 | if (kmem_cache_destroy(cifs_sm_req_cachep)) | |
792 | printk(KERN_WARNING | |
793 | "cifs_destroy_request_cache: cifs_small_rq free error\n"); | |
794 | } | |
795 | ||
796 | static int | |
797 | cifs_init_mids(void) | |
798 | { | |
799 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
800 | sizeof (struct mid_q_entry), 0, | |
801 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
802 | if (cifs_mid_cachep == NULL) | |
803 | return -ENOMEM; | |
804 | ||
93d2341c MD |
805 | /* 3 is a reasonable minimum number of simultaneous operations */ |
806 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
1da177e4 LT |
807 | if(cifs_mid_poolp == NULL) { |
808 | kmem_cache_destroy(cifs_mid_cachep); | |
809 | return -ENOMEM; | |
810 | } | |
811 | ||
812 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
813 | sizeof (struct oplock_q_entry), 0, | |
814 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
815 | if (cifs_oplock_cachep == NULL) { | |
816 | kmem_cache_destroy(cifs_mid_cachep); | |
817 | mempool_destroy(cifs_mid_poolp); | |
818 | return -ENOMEM; | |
819 | } | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | static void | |
825 | cifs_destroy_mids(void) | |
826 | { | |
827 | mempool_destroy(cifs_mid_poolp); | |
828 | if (kmem_cache_destroy(cifs_mid_cachep)) | |
829 | printk(KERN_WARNING | |
830 | "cifs_destroy_mids: error not all structures were freed\n"); | |
831 | ||
832 | if (kmem_cache_destroy(cifs_oplock_cachep)) | |
833 | printk(KERN_WARNING | |
834 | "error not all oplock structures were freed\n"); | |
835 | } | |
836 | ||
837 | static int cifs_oplock_thread(void * dummyarg) | |
838 | { | |
839 | struct oplock_q_entry * oplock_item; | |
840 | struct cifsTconInfo *pTcon; | |
841 | struct inode * inode; | |
842 | __u16 netfid; | |
843 | int rc; | |
844 | ||
1da177e4 | 845 | do { |
ede1327e SF |
846 | if (try_to_freeze()) |
847 | continue; | |
1da177e4 | 848 | |
1da177e4 LT |
849 | spin_lock(&GlobalMid_Lock); |
850 | if(list_empty(&GlobalOplock_Q)) { | |
851 | spin_unlock(&GlobalMid_Lock); | |
852 | set_current_state(TASK_INTERRUPTIBLE); | |
853 | schedule_timeout(39*HZ); | |
854 | } else { | |
855 | oplock_item = list_entry(GlobalOplock_Q.next, | |
856 | struct oplock_q_entry, qhead); | |
857 | if(oplock_item) { | |
858 | cFYI(1,("found oplock item to write out")); | |
859 | pTcon = oplock_item->tcon; | |
860 | inode = oplock_item->pinode; | |
861 | netfid = oplock_item->netfid; | |
862 | spin_unlock(&GlobalMid_Lock); | |
863 | DeleteOplockQEntry(oplock_item); | |
864 | /* can not grab inode sem here since it would | |
865 | deadlock when oplock received on delete | |
1b1dcc1b | 866 | since vfs_unlink holds the i_mutex across |
1da177e4 | 867 | the call */ |
1b1dcc1b | 868 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 LT |
869 | if (S_ISREG(inode->i_mode)) { |
870 | rc = filemap_fdatawrite(inode->i_mapping); | |
871 | if(CIFS_I(inode)->clientCanCacheRead == 0) { | |
872 | filemap_fdatawait(inode->i_mapping); | |
873 | invalidate_remote_inode(inode); | |
874 | } | |
875 | } else | |
876 | rc = 0; | |
1b1dcc1b | 877 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
878 | if (rc) |
879 | CIFS_I(inode)->write_behind_rc = rc; | |
880 | cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); | |
881 | ||
882 | /* releasing a stale oplock after recent reconnection | |
883 | of smb session using a now incorrect file | |
884 | handle is not a data integrity issue but do | |
885 | not bother sending an oplock release if session | |
886 | to server still is disconnected since oplock | |
887 | already released by the server in that case */ | |
888 | if(pTcon->tidStatus != CifsNeedReconnect) { | |
889 | rc = CIFSSMBLock(0, pTcon, netfid, | |
890 | 0 /* len */ , 0 /* offset */, 0, | |
891 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
892 | 0 /* wait flag */); | |
893 | cFYI(1,("Oplock release rc = %d ",rc)); | |
894 | } | |
895 | } else | |
896 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
897 | set_current_state(TASK_INTERRUPTIBLE); |
898 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 899 | } |
45af7a0f SF |
900 | } while (!kthread_should_stop()); |
901 | ||
902 | return 0; | |
1da177e4 LT |
903 | } |
904 | ||
8d0d5094 SF |
905 | static int cifs_dnotify_thread(void * dummyarg) |
906 | { | |
6ab16d24 SF |
907 | struct list_head *tmp; |
908 | struct cifsSesInfo *ses; | |
909 | ||
8d0d5094 | 910 | do { |
0fd1ffe0 | 911 | if (try_to_freeze()) |
16abbecd | 912 | continue; |
8d0d5094 | 913 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
914 | schedule_timeout(15*HZ); |
915 | read_lock(&GlobalSMBSeslock); | |
916 | /* check if any stuck requests that need | |
917 | to be woken up and wakeq so the | |
918 | thread can wake up and error out */ | |
919 | list_for_each(tmp, &GlobalSMBSessionList) { | |
920 | ses = list_entry(tmp, struct cifsSesInfo, | |
921 | cifsSessionList); | |
922 | if(ses && ses->server && | |
2a138ebb | 923 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
924 | wake_up_all(&ses->server->response_q); |
925 | } | |
926 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
927 | } while (!kthread_should_stop()); |
928 | ||
929 | return 0; | |
1da177e4 LT |
930 | } |
931 | ||
932 | static int __init | |
933 | init_cifs(void) | |
934 | { | |
935 | int rc = 0; | |
936 | #ifdef CONFIG_PROC_FS | |
937 | cifs_proc_init(); | |
938 | #endif | |
939 | INIT_LIST_HEAD(&GlobalServerList); /* BB not implemented yet */ | |
940 | INIT_LIST_HEAD(&GlobalSMBSessionList); | |
941 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
942 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
943 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
944 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
945 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
946 | #endif | |
1da177e4 LT |
947 | /* |
948 | * Initialize Global counters | |
949 | */ | |
950 | atomic_set(&sesInfoAllocCount, 0); | |
951 | atomic_set(&tconInfoAllocCount, 0); | |
952 | atomic_set(&tcpSesAllocCount,0); | |
953 | atomic_set(&tcpSesReconnectCount, 0); | |
954 | atomic_set(&tconInfoReconnectCount, 0); | |
955 | ||
956 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
957 | atomic_set(&smBufAllocCount, 0); |
958 | #ifdef CONFIG_CIFS_STATS2 | |
959 | atomic_set(&totBufAllocCount, 0); | |
960 | atomic_set(&totSmBufAllocCount, 0); | |
961 | #endif /* CONFIG_CIFS_STATS2 */ | |
962 | ||
1da177e4 LT |
963 | atomic_set(&midCount, 0); |
964 | GlobalCurrentXid = 0; | |
965 | GlobalTotalActiveXid = 0; | |
966 | GlobalMaxActiveXid = 0; | |
967 | rwlock_init(&GlobalSMBSeslock); | |
968 | spin_lock_init(&GlobalMid_Lock); | |
969 | ||
970 | if(cifs_max_pending < 2) { | |
971 | cifs_max_pending = 2; | |
972 | cFYI(1,("cifs_max_pending set to min of 2")); | |
973 | } else if(cifs_max_pending > 256) { | |
974 | cifs_max_pending = 256; | |
975 | cFYI(1,("cifs_max_pending set to max of 256")); | |
976 | } | |
977 | ||
978 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
979 | if (rc) |
980 | goto out_clean_proc; | |
981 | ||
982 | rc = cifs_init_mids(); | |
983 | if (rc) | |
984 | goto out_destroy_inodecache; | |
985 | ||
986 | rc = cifs_init_request_bufs(); | |
987 | if (rc) | |
988 | goto out_destroy_mids; | |
989 | ||
990 | rc = register_filesystem(&cifs_fs_type); | |
991 | if (rc) | |
992 | goto out_destroy_request_bufs; | |
993 | ||
994 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); | |
995 | if (IS_ERR(oplockThread)) { | |
996 | rc = PTR_ERR(oplockThread); | |
997 | cERROR(1,("error %d create oplock thread", rc)); | |
998 | goto out_unregister_filesystem; | |
1da177e4 | 999 | } |
45af7a0f SF |
1000 | |
1001 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1002 | if (IS_ERR(dnotifyThread)) { | |
1003 | rc = PTR_ERR(dnotifyThread); | |
1004 | cERROR(1,("error %d create dnotify thread", rc)); | |
1005 | goto out_stop_oplock_thread; | |
1006 | } | |
1007 | ||
1008 | return 0; | |
1009 | ||
1010 | out_stop_oplock_thread: | |
1011 | kthread_stop(oplockThread); | |
1012 | out_unregister_filesystem: | |
1013 | unregister_filesystem(&cifs_fs_type); | |
1014 | out_destroy_request_bufs: | |
1015 | cifs_destroy_request_bufs(); | |
1016 | out_destroy_mids: | |
1017 | cifs_destroy_mids(); | |
1018 | out_destroy_inodecache: | |
1019 | cifs_destroy_inodecache(); | |
1020 | out_clean_proc: | |
1da177e4 LT |
1021 | #ifdef CONFIG_PROC_FS |
1022 | cifs_proc_clean(); | |
1023 | #endif | |
1024 | return rc; | |
1025 | } | |
1026 | ||
1027 | static void __exit | |
1028 | exit_cifs(void) | |
1029 | { | |
1030 | cFYI(0, ("In unregister ie exit_cifs")); | |
1031 | #ifdef CONFIG_PROC_FS | |
1032 | cifs_proc_clean(); | |
1033 | #endif | |
1034 | unregister_filesystem(&cifs_fs_type); | |
1035 | cifs_destroy_inodecache(); | |
1036 | cifs_destroy_mids(); | |
1037 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1038 | kthread_stop(oplockThread); |
1039 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1040 | } |
1041 | ||
1042 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
1043 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ | |
1044 | MODULE_DESCRIPTION | |
1045 | ("VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows"); | |
1046 | MODULE_VERSION(CIFS_VERSION); | |
1047 | module_init(init_cifs) | |
1048 | module_exit(exit_cifs) |