Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
35c11fdd | 4 | * Copyright (C) International Business Machines Corp., 2002,2007 |
1da177e4 LT |
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; | |
35c11fdd SF |
50 | #endif /* QUOTA */ |
51 | ||
52 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
53 | extern struct export_operations cifs_export_ops; | |
54 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
55 | |
56 | int cifsFYI = 0; | |
57 | int cifsERROR = 1; | |
58 | int traceSMB = 0; | |
59 | unsigned int oplockEnabled = 1; | |
60 | unsigned int experimEnabled = 0; | |
61 | unsigned int linuxExtEnabled = 1; | |
62 | unsigned int lookupCacheEnabled = 1; | |
63 | unsigned int multiuser_mount = 0; | |
3979877e SF |
64 | unsigned int extended_security = CIFSSEC_DEF; |
65 | /* unsigned int ntlmv2_support = 0; */ | |
1da177e4 LT |
66 | unsigned int sign_CIFS_PDUs = 1; |
67 | extern struct task_struct * oplockThread; /* remove sparse warning */ | |
68 | struct task_struct * oplockThread = NULL; | |
99ee4dbd SF |
69 | /* extern struct task_struct * dnotifyThread; remove sparse warning */ |
70 | static struct task_struct * dnotifyThread = NULL; | |
ee9b6d61 | 71 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
72 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
73 | module_param(CIFSMaxBufSize, int, 0); | |
74 | MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048"); | |
75 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; | |
76 | module_param(cifs_min_rcv, int, 0); | |
77 | MODULE_PARM_DESC(cifs_min_rcv,"Network buffers in pool. Default: 4 Range: 1 to 64"); | |
78 | unsigned int cifs_min_small = 30; | |
79 | module_param(cifs_min_small, int, 0); | |
80 | MODULE_PARM_DESC(cifs_min_small,"Small network buffers in pool. Default: 30 Range: 2 to 256"); | |
81 | unsigned int cifs_max_pending = CIFS_MAX_REQ; | |
82 | module_param(cifs_max_pending, int, 0); | |
83 | MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256"); | |
84 | ||
1da177e4 LT |
85 | extern mempool_t *cifs_sm_req_poolp; |
86 | extern mempool_t *cifs_req_poolp; | |
87 | extern mempool_t *cifs_mid_poolp; | |
88 | ||
e18b890b | 89 | extern struct kmem_cache *cifs_oplock_cachep; |
1da177e4 LT |
90 | |
91 | static int | |
92 | cifs_read_super(struct super_block *sb, void *data, | |
93 | const char *devname, int silent) | |
94 | { | |
95 | struct inode *inode; | |
96 | struct cifs_sb_info *cifs_sb; | |
97 | int rc = 0; | |
1b2b2126 SF |
98 | |
99 | /* BB should we make this contingent on mount parm? */ | |
100 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
a048d7a8 | 101 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info),GFP_KERNEL); |
1da177e4 LT |
102 | cifs_sb = CIFS_SB(sb); |
103 | if(cifs_sb == NULL) | |
104 | return -ENOMEM; | |
1da177e4 LT |
105 | |
106 | rc = cifs_mount(sb, cifs_sb, data, devname); | |
107 | ||
108 | if (rc) { | |
109 | if (!silent) | |
110 | cERROR(1, | |
111 | ("cifs_mount failed w/return code = %d", rc)); | |
112 | goto out_mount_failed; | |
113 | } | |
114 | ||
115 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
116 | sb->s_op = &cifs_super_ops; | |
35c11fdd SF |
117 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
118 | if(experimEnabled != 0) | |
119 | sb->s_export_op = &cifs_export_ops; | |
120 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
121 | /* if(cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
122 | sb->s_blocksize = cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
123 | #ifdef CONFIG_CIFS_QUOTA | |
124 | sb->s_qcop = &cifs_quotactl_ops; | |
125 | #endif | |
126 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
127 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
128 | inode = iget(sb, ROOT_I); | |
129 | ||
130 | if (!inode) { | |
131 | rc = -ENOMEM; | |
132 | goto out_no_root; | |
133 | } | |
134 | ||
135 | sb->s_root = d_alloc_root(inode); | |
136 | ||
137 | if (!sb->s_root) { | |
138 | rc = -ENOMEM; | |
139 | goto out_no_root; | |
140 | } | |
141 | ||
142 | return 0; | |
143 | ||
144 | out_no_root: | |
145 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
146 | if (inode) | |
147 | iput(inode); | |
148 | ||
149 | out_mount_failed: | |
150 | if(cifs_sb) { | |
151 | if(cifs_sb->local_nls) | |
152 | unload_nls(cifs_sb->local_nls); | |
153 | kfree(cifs_sb); | |
154 | } | |
155 | return rc; | |
156 | } | |
157 | ||
158 | static void | |
159 | cifs_put_super(struct super_block *sb) | |
160 | { | |
161 | int rc = 0; | |
162 | struct cifs_sb_info *cifs_sb; | |
163 | ||
164 | cFYI(1, ("In cifs_put_super")); | |
165 | cifs_sb = CIFS_SB(sb); | |
166 | if(cifs_sb == NULL) { | |
167 | cFYI(1,("Empty cifs superblock info passed to unmount")); | |
168 | return; | |
169 | } | |
170 | rc = cifs_umount(sb, cifs_sb); | |
171 | if (rc) { | |
172 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
173 | } | |
174 | unload_nls(cifs_sb->local_nls); | |
175 | kfree(cifs_sb); | |
176 | return; | |
177 | } | |
178 | ||
179 | static int | |
726c3342 | 180 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 181 | { |
726c3342 | 182 | struct super_block *sb = dentry->d_sb; |
c81156dd SF |
183 | int xid; |
184 | int rc = -EOPNOTSUPP; | |
1da177e4 LT |
185 | struct cifs_sb_info *cifs_sb; |
186 | struct cifsTconInfo *pTcon; | |
187 | ||
188 | xid = GetXid(); | |
189 | ||
190 | cifs_sb = CIFS_SB(sb); | |
191 | pTcon = cifs_sb->tcon; | |
192 | ||
193 | buf->f_type = CIFS_MAGIC_NUMBER; | |
194 | ||
195 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ | |
c81156dd SF |
196 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
197 | presumably be total path, but note | |
198 | that some servers (includinng Samba 3) | |
199 | have a shorter maximum path */ | |
1da177e4 LT |
200 | buf->f_files = 0; /* undefined */ |
201 | buf->f_ffree = 0; /* unlimited */ | |
202 | ||
1da177e4 | 203 | /* BB we could add a second check for a QFS Unix capability bit */ |
f28ac91b | 204 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
205 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
206 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 207 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
208 | |
209 | /* Only need to call the old QFSInfo if failed | |
210 | on newer one */ | |
211 | if(rc) | |
de7ed55d | 212 | if(pTcon->ses->capabilities & CAP_NT_SMBS) |
9ac00b7d | 213 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); /* not supported by OS2 */ |
1da177e4 | 214 | |
9ac00b7d SF |
215 | /* Some old Windows servers also do not support level 103, retry with |
216 | older level one if old server failed the previous call or we | |
217 | bypassed it because we detected that this was an older LANMAN sess */ | |
20962438 SF |
218 | if(rc) |
219 | rc = SMBOldQFSInfo(xid, pTcon, buf); | |
1da177e4 LT |
220 | /* |
221 | int f_type; | |
222 | __fsid_t f_fsid; | |
223 | int f_namelen; */ | |
c81156dd | 224 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 225 | FreeXid(xid); |
c81156dd SF |
226 | return 0; /* always return success? what if volume is no |
227 | longer available? */ | |
1da177e4 LT |
228 | } |
229 | ||
230 | static int cifs_permission(struct inode * inode, int mask, struct nameidata *nd) | |
231 | { | |
232 | struct cifs_sb_info *cifs_sb; | |
233 | ||
234 | cifs_sb = CIFS_SB(inode->i_sb); | |
235 | ||
236 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { | |
237 | return 0; | |
238 | } else /* file mode might have been restricted at mount time | |
239 | on the client (above and beyond ACL on servers) for | |
240 | servers which do not support setting and viewing mode bits, | |
241 | so allowing client to check permissions is useful */ | |
242 | return generic_permission(inode, mask, NULL); | |
243 | } | |
244 | ||
e18b890b CL |
245 | static struct kmem_cache *cifs_inode_cachep; |
246 | static struct kmem_cache *cifs_req_cachep; | |
247 | static struct kmem_cache *cifs_mid_cachep; | |
248 | struct kmem_cache *cifs_oplock_cachep; | |
249 | static struct kmem_cache *cifs_sm_req_cachep; | |
1da177e4 LT |
250 | mempool_t *cifs_sm_req_poolp; |
251 | mempool_t *cifs_req_poolp; | |
252 | mempool_t *cifs_mid_poolp; | |
253 | ||
254 | static struct inode * | |
255 | cifs_alloc_inode(struct super_block *sb) | |
256 | { | |
257 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 258 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
259 | if (!cifs_inode) |
260 | return NULL; | |
261 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
262 | atomic_set(&cifs_inode->inUse, 0); | |
263 | cifs_inode->time = 0; | |
264 | /* Until the file is open and we have gotten oplock | |
265 | info back from the server, can not assume caching of | |
266 | file data or metadata */ | |
267 | cifs_inode->clientCanCacheRead = FALSE; | |
268 | cifs_inode->clientCanCacheAll = FALSE; | |
1da177e4 | 269 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
1b2b2126 SF |
270 | |
271 | /* Can not set i_flags here - they get immediately overwritten | |
272 | to zero by the VFS */ | |
273 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
274 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
275 | return &cifs_inode->vfs_inode; | |
276 | } | |
277 | ||
278 | static void | |
279 | cifs_destroy_inode(struct inode *inode) | |
280 | { | |
281 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
282 | } | |
283 | ||
284 | /* | |
285 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
286 | * Not all settable options are displayed but most of the important | |
287 | * ones are. | |
288 | */ | |
289 | static int | |
290 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
291 | { | |
292 | struct cifs_sb_info *cifs_sb; | |
293 | ||
294 | cifs_sb = CIFS_SB(m->mnt_sb); | |
295 | ||
296 | if (cifs_sb) { | |
297 | if (cifs_sb->tcon) { | |
004c46b9 | 298 | /* BB add prepath to mount options displayed */ |
1da177e4 LT |
299 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); |
300 | if (cifs_sb->tcon->ses) { | |
301 | if (cifs_sb->tcon->ses->userName) | |
302 | seq_printf(s, ",username=%s", | |
303 | cifs_sb->tcon->ses->userName); | |
304 | if(cifs_sb->tcon->ses->domainName) | |
305 | seq_printf(s, ",domain=%s", | |
306 | cifs_sb->tcon->ses->domainName); | |
307 | } | |
308 | } | |
309 | seq_printf(s, ",rsize=%d",cifs_sb->rsize); | |
310 | seq_printf(s, ",wsize=%d",cifs_sb->wsize); | |
311 | } | |
312 | return 0; | |
313 | } | |
314 | ||
315 | #ifdef CONFIG_CIFS_QUOTA | |
316 | int cifs_xquota_set(struct super_block * sb, int quota_type, qid_t qid, | |
317 | struct fs_disk_quota * pdquota) | |
318 | { | |
319 | int xid; | |
320 | int rc = 0; | |
321 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
322 | struct cifsTconInfo *pTcon; | |
323 | ||
324 | if(cifs_sb) | |
325 | pTcon = cifs_sb->tcon; | |
326 | else | |
327 | return -EIO; | |
328 | ||
329 | ||
330 | xid = GetXid(); | |
331 | if(pTcon) { | |
332 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
333 | } else { | |
334 | return -EIO; | |
335 | } | |
336 | ||
337 | FreeXid(xid); | |
338 | return rc; | |
339 | } | |
340 | ||
341 | int cifs_xquota_get(struct super_block * sb, int quota_type, qid_t qid, | |
342 | struct fs_disk_quota * pdquota) | |
343 | { | |
344 | int xid; | |
345 | int rc = 0; | |
346 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
347 | struct cifsTconInfo *pTcon; | |
348 | ||
349 | if(cifs_sb) | |
350 | pTcon = cifs_sb->tcon; | |
351 | else | |
352 | return -EIO; | |
353 | ||
354 | xid = GetXid(); | |
355 | if(pTcon) { | |
356 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
357 | } else { | |
358 | rc = -EIO; | |
359 | } | |
360 | ||
361 | FreeXid(xid); | |
362 | return rc; | |
363 | } | |
364 | ||
365 | int cifs_xstate_set(struct super_block * sb, unsigned int flags, int operation) | |
366 | { | |
367 | int xid; | |
368 | int rc = 0; | |
369 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
370 | struct cifsTconInfo *pTcon; | |
371 | ||
372 | if(cifs_sb) | |
373 | pTcon = cifs_sb->tcon; | |
374 | else | |
375 | return -EIO; | |
376 | ||
377 | xid = GetXid(); | |
378 | if(pTcon) { | |
379 | cFYI(1,("flags: 0x%x operation: 0x%x",flags,operation)); | |
380 | } else { | |
381 | rc = -EIO; | |
382 | } | |
383 | ||
384 | FreeXid(xid); | |
385 | return rc; | |
386 | } | |
387 | ||
388 | int cifs_xstate_get(struct super_block * sb, struct fs_quota_stat *qstats) | |
389 | { | |
390 | int xid; | |
391 | int rc = 0; | |
392 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
393 | struct cifsTconInfo *pTcon; | |
394 | ||
395 | if(cifs_sb) { | |
396 | pTcon = cifs_sb->tcon; | |
397 | } else { | |
398 | return -EIO; | |
399 | } | |
400 | xid = GetXid(); | |
401 | if(pTcon) { | |
402 | cFYI(1,("pqstats %p",qstats)); | |
403 | } else { | |
404 | rc = -EIO; | |
405 | } | |
406 | ||
407 | FreeXid(xid); | |
408 | return rc; | |
409 | } | |
410 | ||
411 | static struct quotactl_ops cifs_quotactl_ops = { | |
412 | .set_xquota = cifs_xquota_set, | |
413 | .get_xquota = cifs_xquota_set, | |
414 | .set_xstate = cifs_xstate_set, | |
415 | .get_xstate = cifs_xstate_get, | |
416 | }; | |
417 | #endif | |
418 | ||
8b512d9a | 419 | static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags) |
68058e75 | 420 | { |
5e1253b5 | 421 | struct cifs_sb_info *cifs_sb; |
9e2e85f8 | 422 | struct cifsTconInfo * tcon; |
68058e75 | 423 | |
8b512d9a TM |
424 | if (!(flags & MNT_FORCE)) |
425 | return; | |
426 | cifs_sb = CIFS_SB(vfsmnt->mnt_sb); | |
5e1253b5 | 427 | if(cifs_sb == NULL) |
9e2e85f8 SF |
428 | return; |
429 | ||
430 | tcon = cifs_sb->tcon; | |
431 | if(tcon == NULL) | |
432 | return; | |
5e1253b5 SF |
433 | down(&tcon->tconSem); |
434 | if (atomic_read(&tcon->useCount) == 1) | |
435 | tcon->tidStatus = CifsExiting; | |
436 | up(&tcon->tconSem); | |
437 | ||
3a5ff61c | 438 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 439 | /* cancel_notify_requests(tcon); */ |
9e2e85f8 | 440 | if(tcon->ses && tcon->ses->server) |
5e1253b5 | 441 | { |
7b7abfe3 | 442 | cFYI(1,("wake up tasks now - umount begin not complete")); |
9e2e85f8 | 443 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
444 | wake_up_all(&tcon->ses->server->response_q); |
445 | msleep(1); /* yield */ | |
446 | /* we have to kick the requests once more */ | |
447 | wake_up_all(&tcon->ses->server->response_q); | |
448 | msleep(1); | |
5e1253b5 SF |
449 | } |
450 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
451 | |
452 | return; | |
453 | } | |
68058e75 | 454 | |
bf97d287 SF |
455 | #ifdef CONFIG_CIFS_STATS2 |
456 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
457 | { | |
458 | /* BB FIXME */ | |
459 | return 0; | |
460 | } | |
461 | #endif | |
462 | ||
1da177e4 LT |
463 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
464 | { | |
465 | *flags |= MS_NODIRATIME; | |
466 | return 0; | |
467 | } | |
468 | ||
ee9b6d61 | 469 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
470 | .read_inode = cifs_read_inode, |
471 | .put_super = cifs_put_super, | |
472 | .statfs = cifs_statfs, | |
473 | .alloc_inode = cifs_alloc_inode, | |
474 | .destroy_inode = cifs_destroy_inode, | |
475 | /* .drop_inode = generic_delete_inode, | |
476 | .delete_inode = cifs_delete_inode, *//* Do not need the above two functions | |
477 | unless later we add lazy close of inodes or unless the kernel forgets to call | |
478 | us with the same number of releases (closes) as opens */ | |
479 | .show_options = cifs_show_options, | |
7b7abfe3 | 480 | .umount_begin = cifs_umount_begin, |
1da177e4 | 481 | .remount_fs = cifs_remount, |
bf97d287 | 482 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 483 | .show_stats = cifs_show_stats, |
bf97d287 | 484 | #endif |
1da177e4 LT |
485 | }; |
486 | ||
454e2398 | 487 | static int |
1da177e4 | 488 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 489 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
490 | { |
491 | int rc; | |
492 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
493 | ||
494 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
495 | ||
496 | if (IS_ERR(sb)) | |
454e2398 | 497 | return PTR_ERR(sb); |
1da177e4 LT |
498 | |
499 | sb->s_flags = flags; | |
500 | ||
9b04c997 | 501 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
502 | if (rc) { |
503 | up_write(&sb->s_umount); | |
504 | deactivate_super(sb); | |
454e2398 | 505 | return rc; |
1da177e4 LT |
506 | } |
507 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 508 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
509 | } |
510 | ||
027445c3 BP |
511 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
512 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 513 | { |
e6a00296 | 514 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
515 | ssize_t written; |
516 | ||
027445c3 | 517 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
518 | if (!CIFS_I(inode)->clientCanCacheAll) |
519 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
520 | return written; |
521 | } | |
522 | ||
c32a0b68 SF |
523 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
524 | { | |
525 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 526 | if (origin == SEEK_END) { |
030e9d81 SF |
527 | int retval; |
528 | ||
529 | /* some applications poll for the file length in this strange | |
530 | way so we must seek to end on non-oplocked files by | |
531 | setting the revalidate time to zero */ | |
532 | if(file->f_path.dentry->d_inode) | |
533 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; | |
534 | ||
535 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
536 | if (retval < 0) |
537 | return (loff_t)retval; | |
538 | } | |
539 | return remote_llseek(file, offset, origin); | |
540 | } | |
541 | ||
1da177e4 LT |
542 | static struct file_system_type cifs_fs_type = { |
543 | .owner = THIS_MODULE, | |
544 | .name = "cifs", | |
545 | .get_sb = cifs_get_sb, | |
546 | .kill_sb = kill_anon_super, | |
547 | /* .fs_flags */ | |
548 | }; | |
754661f1 | 549 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
550 | .create = cifs_create, |
551 | .lookup = cifs_lookup, | |
552 | .getattr = cifs_getattr, | |
553 | .unlink = cifs_unlink, | |
554 | .link = cifs_hardlink, | |
555 | .mkdir = cifs_mkdir, | |
556 | .rmdir = cifs_rmdir, | |
557 | .rename = cifs_rename, | |
558 | .permission = cifs_permission, | |
559 | /* revalidate:cifs_revalidate, */ | |
560 | .setattr = cifs_setattr, | |
561 | .symlink = cifs_symlink, | |
562 | .mknod = cifs_mknod, | |
563 | #ifdef CONFIG_CIFS_XATTR | |
564 | .setxattr = cifs_setxattr, | |
565 | .getxattr = cifs_getxattr, | |
566 | .listxattr = cifs_listxattr, | |
567 | .removexattr = cifs_removexattr, | |
568 | #endif | |
569 | }; | |
570 | ||
754661f1 | 571 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
572 | /* revalidate:cifs_revalidate, */ |
573 | .setattr = cifs_setattr, | |
574 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
575 | .rename = cifs_rename, | |
576 | .permission = cifs_permission, | |
577 | #ifdef CONFIG_CIFS_XATTR | |
578 | .setxattr = cifs_setxattr, | |
579 | .getxattr = cifs_getxattr, | |
580 | .listxattr = cifs_listxattr, | |
581 | .removexattr = cifs_removexattr, | |
582 | #endif | |
583 | }; | |
584 | ||
754661f1 | 585 | const struct inode_operations cifs_symlink_inode_ops = { |
1da177e4 LT |
586 | .readlink = generic_readlink, |
587 | .follow_link = cifs_follow_link, | |
588 | .put_link = cifs_put_link, | |
589 | .permission = cifs_permission, | |
590 | /* BB add the following two eventually */ | |
591 | /* revalidate: cifs_revalidate, | |
592 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
593 | #ifdef CONFIG_CIFS_XATTR | |
594 | .setxattr = cifs_setxattr, | |
595 | .getxattr = cifs_getxattr, | |
596 | .listxattr = cifs_listxattr, | |
597 | .removexattr = cifs_removexattr, | |
598 | #endif | |
599 | }; | |
600 | ||
4b6f5d20 | 601 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
602 | .read = do_sync_read, |
603 | .write = do_sync_write, | |
87c89dd7 SF |
604 | .aio_read = generic_file_aio_read, |
605 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
606 | .open = cifs_open, |
607 | .release = cifs_close, | |
608 | .lock = cifs_lock, | |
609 | .fsync = cifs_fsync, | |
610 | .flush = cifs_flush, | |
611 | .mmap = cifs_file_mmap, | |
612 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 613 | .llseek = cifs_llseek, |
c67593a0 SF |
614 | #ifdef CONFIG_CIFS_POSIX |
615 | .ioctl = cifs_ioctl, | |
616 | #endif /* CONFIG_CIFS_POSIX */ | |
617 | ||
1da177e4 | 618 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
619 | .dir_notify = cifs_dir_notify, |
620 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
621 | }; | |
622 | ||
4b6f5d20 | 623 | const struct file_operations cifs_file_direct_ops = { |
1da177e4 LT |
624 | /* no mmap, no aio, no readv - |
625 | BB reevaluate whether they can be done with directio, no cache */ | |
626 | .read = cifs_user_read, | |
627 | .write = cifs_user_write, | |
628 | .open = cifs_open, | |
629 | .release = cifs_close, | |
630 | .lock = cifs_lock, | |
631 | .fsync = cifs_fsync, | |
632 | .flush = cifs_flush, | |
633 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
c67593a0 SF |
634 | #ifdef CONFIG_CIFS_POSIX |
635 | .ioctl = cifs_ioctl, | |
636 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 637 | .llseek = cifs_llseek, |
1da177e4 LT |
638 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
639 | .dir_notify = cifs_dir_notify, | |
640 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
641 | }; | |
4b6f5d20 | 642 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
643 | .read = do_sync_read, |
644 | .write = do_sync_write, | |
87c89dd7 SF |
645 | .aio_read = generic_file_aio_read, |
646 | .aio_write = cifs_file_aio_write, | |
647 | .open = cifs_open, | |
648 | .release = cifs_close, | |
649 | .fsync = cifs_fsync, | |
650 | .flush = cifs_flush, | |
651 | .mmap = cifs_file_mmap, | |
652 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 653 | .llseek = cifs_llseek, |
8b94bcb9 | 654 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 655 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
656 | #endif /* CONFIG_CIFS_POSIX */ |
657 | ||
658 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 659 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
660 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
661 | }; | |
662 | ||
4b6f5d20 | 663 | const struct file_operations cifs_file_direct_nobrl_ops = { |
87c89dd7 SF |
664 | /* no mmap, no aio, no readv - |
665 | BB reevaluate whether they can be done with directio, no cache */ | |
666 | .read = cifs_user_read, | |
667 | .write = cifs_user_write, | |
668 | .open = cifs_open, | |
669 | .release = cifs_close, | |
670 | .fsync = cifs_fsync, | |
671 | .flush = cifs_flush, | |
672 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
8b94bcb9 | 673 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 674 | .ioctl = cifs_ioctl, |
8b94bcb9 | 675 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 676 | .llseek = cifs_llseek, |
8b94bcb9 | 677 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 678 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
679 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
680 | }; | |
1da177e4 | 681 | |
4b6f5d20 | 682 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
683 | .readdir = cifs_readdir, |
684 | .release = cifs_closedir, | |
685 | .read = generic_read_dir, | |
686 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
687 | .dir_notify = cifs_dir_notify, | |
688 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
f28ac91b | 689 | .ioctl = cifs_ioctl, |
1da177e4 LT |
690 | }; |
691 | ||
692 | static void | |
e18b890b | 693 | cifs_init_once(void *inode, struct kmem_cache * cachep, unsigned long flags) |
1da177e4 LT |
694 | { |
695 | struct cifsInodeInfo *cifsi = inode; | |
696 | ||
697 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | |
698 | SLAB_CTOR_CONSTRUCTOR) { | |
699 | inode_init_once(&cifsi->vfs_inode); | |
700 | INIT_LIST_HEAD(&cifsi->lockList); | |
701 | } | |
702 | } | |
703 | ||
704 | static int | |
705 | cifs_init_inodecache(void) | |
706 | { | |
707 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
708 | sizeof (struct cifsInodeInfo), | |
fffb60f9 PJ |
709 | 0, (SLAB_RECLAIM_ACCOUNT| |
710 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
711 | cifs_init_once, NULL); |
712 | if (cifs_inode_cachep == NULL) | |
713 | return -ENOMEM; | |
714 | ||
715 | return 0; | |
716 | } | |
717 | ||
718 | static void | |
719 | cifs_destroy_inodecache(void) | |
720 | { | |
1a1d92c1 | 721 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
722 | } |
723 | ||
724 | static int | |
725 | cifs_init_request_bufs(void) | |
726 | { | |
727 | if(CIFSMaxBufSize < 8192) { | |
728 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum | |
729 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
730 | CIFSMaxBufSize = 8192; | |
731 | } else if (CIFSMaxBufSize > 1024*127) { | |
732 | CIFSMaxBufSize = 1024 * 127; | |
733 | } else { | |
734 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
735 | } | |
736 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
737 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
738 | CIFSMaxBufSize + | |
739 | MAX_CIFS_HDR_SIZE, 0, | |
740 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
741 | if (cifs_req_cachep == NULL) | |
742 | return -ENOMEM; | |
743 | ||
744 | if(cifs_min_rcv < 1) | |
745 | cifs_min_rcv = 1; | |
746 | else if (cifs_min_rcv > 64) { | |
747 | cifs_min_rcv = 64; | |
748 | cERROR(1,("cifs_min_rcv set to maximum (64)")); | |
749 | } | |
750 | ||
93d2341c MD |
751 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
752 | cifs_req_cachep); | |
1da177e4 LT |
753 | |
754 | if(cifs_req_poolp == NULL) { | |
755 | kmem_cache_destroy(cifs_req_cachep); | |
756 | return -ENOMEM; | |
757 | } | |
ec637e3f | 758 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
759 | almost all handle based requests (but not write response, nor is it |
760 | sufficient for path based requests). A smaller size would have | |
761 | been more efficient (compacting multiple slab items on one 4k page) | |
762 | for the case in which debug was on, but this larger size allows | |
763 | more SMBs to use small buffer alloc and is still much more | |
764 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
765 | alloc of large cifs buffers even when page debugging is on */ | |
766 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
ec637e3f SF |
767 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
768 | NULL, NULL); | |
1da177e4 LT |
769 | if (cifs_sm_req_cachep == NULL) { |
770 | mempool_destroy(cifs_req_poolp); | |
771 | kmem_cache_destroy(cifs_req_cachep); | |
772 | return -ENOMEM; | |
773 | } | |
774 | ||
775 | if(cifs_min_small < 2) | |
776 | cifs_min_small = 2; | |
777 | else if (cifs_min_small > 256) { | |
778 | cifs_min_small = 256; | |
779 | cFYI(1,("cifs_min_small set to maximum (256)")); | |
780 | } | |
781 | ||
93d2341c MD |
782 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
783 | cifs_sm_req_cachep); | |
1da177e4 LT |
784 | |
785 | if(cifs_sm_req_poolp == NULL) { | |
786 | mempool_destroy(cifs_req_poolp); | |
787 | kmem_cache_destroy(cifs_req_cachep); | |
788 | kmem_cache_destroy(cifs_sm_req_cachep); | |
789 | return -ENOMEM; | |
790 | } | |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
795 | static void | |
796 | cifs_destroy_request_bufs(void) | |
797 | { | |
798 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 799 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 800 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 801 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
802 | } |
803 | ||
804 | static int | |
805 | cifs_init_mids(void) | |
806 | { | |
807 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
808 | sizeof (struct mid_q_entry), 0, | |
809 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
810 | if (cifs_mid_cachep == NULL) | |
811 | return -ENOMEM; | |
812 | ||
93d2341c MD |
813 | /* 3 is a reasonable minimum number of simultaneous operations */ |
814 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
1da177e4 LT |
815 | if(cifs_mid_poolp == NULL) { |
816 | kmem_cache_destroy(cifs_mid_cachep); | |
817 | return -ENOMEM; | |
818 | } | |
819 | ||
820 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
821 | sizeof (struct oplock_q_entry), 0, | |
822 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
823 | if (cifs_oplock_cachep == NULL) { | |
824 | kmem_cache_destroy(cifs_mid_cachep); | |
825 | mempool_destroy(cifs_mid_poolp); | |
826 | return -ENOMEM; | |
827 | } | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
832 | static void | |
833 | cifs_destroy_mids(void) | |
834 | { | |
835 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
836 | kmem_cache_destroy(cifs_mid_cachep); |
837 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
838 | } |
839 | ||
840 | static int cifs_oplock_thread(void * dummyarg) | |
841 | { | |
842 | struct oplock_q_entry * oplock_item; | |
843 | struct cifsTconInfo *pTcon; | |
844 | struct inode * inode; | |
845 | __u16 netfid; | |
846 | int rc; | |
847 | ||
1da177e4 | 848 | do { |
ede1327e SF |
849 | if (try_to_freeze()) |
850 | continue; | |
1da177e4 | 851 | |
1da177e4 LT |
852 | spin_lock(&GlobalMid_Lock); |
853 | if(list_empty(&GlobalOplock_Q)) { | |
854 | spin_unlock(&GlobalMid_Lock); | |
855 | set_current_state(TASK_INTERRUPTIBLE); | |
856 | schedule_timeout(39*HZ); | |
857 | } else { | |
858 | oplock_item = list_entry(GlobalOplock_Q.next, | |
859 | struct oplock_q_entry, qhead); | |
860 | if(oplock_item) { | |
861 | cFYI(1,("found oplock item to write out")); | |
862 | pTcon = oplock_item->tcon; | |
863 | inode = oplock_item->pinode; | |
864 | netfid = oplock_item->netfid; | |
865 | spin_unlock(&GlobalMid_Lock); | |
866 | DeleteOplockQEntry(oplock_item); | |
867 | /* can not grab inode sem here since it would | |
868 | deadlock when oplock received on delete | |
1b1dcc1b | 869 | since vfs_unlink holds the i_mutex across |
1da177e4 | 870 | the call */ |
1b1dcc1b | 871 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 LT |
872 | if (S_ISREG(inode->i_mode)) { |
873 | rc = filemap_fdatawrite(inode->i_mapping); | |
874 | if(CIFS_I(inode)->clientCanCacheRead == 0) { | |
875 | filemap_fdatawait(inode->i_mapping); | |
876 | invalidate_remote_inode(inode); | |
877 | } | |
878 | } else | |
879 | rc = 0; | |
1b1dcc1b | 880 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
881 | if (rc) |
882 | CIFS_I(inode)->write_behind_rc = rc; | |
883 | cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); | |
884 | ||
885 | /* releasing a stale oplock after recent reconnection | |
886 | of smb session using a now incorrect file | |
887 | handle is not a data integrity issue but do | |
888 | not bother sending an oplock release if session | |
889 | to server still is disconnected since oplock | |
890 | already released by the server in that case */ | |
891 | if(pTcon->tidStatus != CifsNeedReconnect) { | |
892 | rc = CIFSSMBLock(0, pTcon, netfid, | |
893 | 0 /* len */ , 0 /* offset */, 0, | |
894 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
895 | 0 /* wait flag */); | |
896 | cFYI(1,("Oplock release rc = %d ",rc)); | |
897 | } | |
898 | } else | |
899 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
900 | set_current_state(TASK_INTERRUPTIBLE); |
901 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 902 | } |
45af7a0f SF |
903 | } while (!kthread_should_stop()); |
904 | ||
905 | return 0; | |
1da177e4 LT |
906 | } |
907 | ||
8d0d5094 SF |
908 | static int cifs_dnotify_thread(void * dummyarg) |
909 | { | |
6ab16d24 SF |
910 | struct list_head *tmp; |
911 | struct cifsSesInfo *ses; | |
912 | ||
8d0d5094 | 913 | do { |
0fd1ffe0 | 914 | if (try_to_freeze()) |
16abbecd | 915 | continue; |
8d0d5094 | 916 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
917 | schedule_timeout(15*HZ); |
918 | read_lock(&GlobalSMBSeslock); | |
919 | /* check if any stuck requests that need | |
920 | to be woken up and wakeq so the | |
921 | thread can wake up and error out */ | |
922 | list_for_each(tmp, &GlobalSMBSessionList) { | |
923 | ses = list_entry(tmp, struct cifsSesInfo, | |
924 | cifsSessionList); | |
925 | if(ses && ses->server && | |
2a138ebb | 926 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
927 | wake_up_all(&ses->server->response_q); |
928 | } | |
929 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
930 | } while (!kthread_should_stop()); |
931 | ||
932 | return 0; | |
1da177e4 LT |
933 | } |
934 | ||
935 | static int __init | |
936 | init_cifs(void) | |
937 | { | |
938 | int rc = 0; | |
939 | #ifdef CONFIG_PROC_FS | |
940 | cifs_proc_init(); | |
941 | #endif | |
2cd646a2 | 942 | /* INIT_LIST_HEAD(&GlobalServerList);*/ /* BB not implemented yet */ |
1da177e4 LT |
943 | INIT_LIST_HEAD(&GlobalSMBSessionList); |
944 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
945 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
946 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
947 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
948 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
949 | #endif | |
1da177e4 LT |
950 | /* |
951 | * Initialize Global counters | |
952 | */ | |
953 | atomic_set(&sesInfoAllocCount, 0); | |
954 | atomic_set(&tconInfoAllocCount, 0); | |
955 | atomic_set(&tcpSesAllocCount,0); | |
956 | atomic_set(&tcpSesReconnectCount, 0); | |
957 | atomic_set(&tconInfoReconnectCount, 0); | |
958 | ||
959 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
960 | atomic_set(&smBufAllocCount, 0); |
961 | #ifdef CONFIG_CIFS_STATS2 | |
962 | atomic_set(&totBufAllocCount, 0); | |
963 | atomic_set(&totSmBufAllocCount, 0); | |
964 | #endif /* CONFIG_CIFS_STATS2 */ | |
965 | ||
1da177e4 LT |
966 | atomic_set(&midCount, 0); |
967 | GlobalCurrentXid = 0; | |
968 | GlobalTotalActiveXid = 0; | |
969 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 970 | memset(Local_System_Name, 0, 15); |
1da177e4 LT |
971 | rwlock_init(&GlobalSMBSeslock); |
972 | spin_lock_init(&GlobalMid_Lock); | |
973 | ||
974 | if(cifs_max_pending < 2) { | |
975 | cifs_max_pending = 2; | |
976 | cFYI(1,("cifs_max_pending set to min of 2")); | |
977 | } else if(cifs_max_pending > 256) { | |
978 | cifs_max_pending = 256; | |
979 | cFYI(1,("cifs_max_pending set to max of 256")); | |
980 | } | |
981 | ||
982 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
983 | if (rc) |
984 | goto out_clean_proc; | |
985 | ||
986 | rc = cifs_init_mids(); | |
987 | if (rc) | |
988 | goto out_destroy_inodecache; | |
989 | ||
990 | rc = cifs_init_request_bufs(); | |
991 | if (rc) | |
992 | goto out_destroy_mids; | |
993 | ||
994 | rc = register_filesystem(&cifs_fs_type); | |
995 | if (rc) | |
996 | goto out_destroy_request_bufs; | |
997 | ||
998 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); | |
999 | if (IS_ERR(oplockThread)) { | |
1000 | rc = PTR_ERR(oplockThread); | |
1001 | cERROR(1,("error %d create oplock thread", rc)); | |
1002 | goto out_unregister_filesystem; | |
1da177e4 | 1003 | } |
45af7a0f SF |
1004 | |
1005 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1006 | if (IS_ERR(dnotifyThread)) { | |
1007 | rc = PTR_ERR(dnotifyThread); | |
1008 | cERROR(1,("error %d create dnotify thread", rc)); | |
1009 | goto out_stop_oplock_thread; | |
1010 | } | |
1011 | ||
1012 | return 0; | |
1013 | ||
1014 | out_stop_oplock_thread: | |
1015 | kthread_stop(oplockThread); | |
1016 | out_unregister_filesystem: | |
1017 | unregister_filesystem(&cifs_fs_type); | |
1018 | out_destroy_request_bufs: | |
1019 | cifs_destroy_request_bufs(); | |
1020 | out_destroy_mids: | |
1021 | cifs_destroy_mids(); | |
1022 | out_destroy_inodecache: | |
1023 | cifs_destroy_inodecache(); | |
1024 | out_clean_proc: | |
1da177e4 LT |
1025 | #ifdef CONFIG_PROC_FS |
1026 | cifs_proc_clean(); | |
1027 | #endif | |
1028 | return rc; | |
1029 | } | |
1030 | ||
1031 | static void __exit | |
1032 | exit_cifs(void) | |
1033 | { | |
1034 | cFYI(0, ("In unregister ie exit_cifs")); | |
1035 | #ifdef CONFIG_PROC_FS | |
1036 | cifs_proc_clean(); | |
1037 | #endif | |
1038 | unregister_filesystem(&cifs_fs_type); | |
1039 | cifs_destroy_inodecache(); | |
1040 | cifs_destroy_mids(); | |
1041 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1042 | kthread_stop(oplockThread); |
1043 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1044 | } |
1045 | ||
1046 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
1047 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ | |
1048 | MODULE_DESCRIPTION | |
1049 | ("VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows"); | |
1050 | MODULE_VERSION(CIFS_VERSION); | |
1051 | module_init(init_cifs) | |
1052 | module_exit(exit_cifs) |