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Commit | Line | Data |
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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 | 102 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 103 | if (cifs_sb == NULL) |
1da177e4 | 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 | 117 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
4523cc30 | 118 | if (experimEnabled != 0) |
35c11fdd SF |
119 | sb->s_export_op = &cifs_export_ops; |
120 | #endif /* EXPERIMENTAL */ | |
4523cc30 | 121 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
1da177e4 LT |
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: | |
4523cc30 SF |
150 | if (cifs_sb) { |
151 | if (cifs_sb->local_nls) | |
1da177e4 LT |
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); | |
4523cc30 | 166 | if (cifs_sb == NULL) { |
1da177e4 LT |
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 */ | |
4523cc30 SF |
211 | if (rc) |
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 */ | |
4523cc30 | 218 | if (rc) |
20962438 | 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); | |
4523cc30 | 304 | if (cifs_sb->tcon->ses->domainName) |
1da177e4 LT |
305 | seq_printf(s, ",domain=%s", |
306 | cifs_sb->tcon->ses->domainName); | |
307 | } | |
308 | } | |
4523cc30 SF |
309 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
310 | seq_printf(s, ",posixpaths"); | |
311 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) || | |
312 | !(cifs_sb->tcon->ses->capabilities & CAP_UNIX)) | |
313 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); | |
314 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) || | |
315 | !(cifs_sb->tcon->ses->capabilities & CAP_UNIX)) | |
316 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); | |
1da177e4 LT |
317 | seq_printf(s, ",rsize=%d",cifs_sb->rsize); |
318 | seq_printf(s, ",wsize=%d",cifs_sb->wsize); | |
319 | } | |
320 | return 0; | |
321 | } | |
322 | ||
323 | #ifdef CONFIG_CIFS_QUOTA | |
324 | int cifs_xquota_set(struct super_block * sb, int quota_type, qid_t qid, | |
325 | struct fs_disk_quota * pdquota) | |
326 | { | |
327 | int xid; | |
328 | int rc = 0; | |
329 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
330 | struct cifsTconInfo *pTcon; | |
331 | ||
4523cc30 | 332 | if (cifs_sb) |
1da177e4 LT |
333 | pTcon = cifs_sb->tcon; |
334 | else | |
335 | return -EIO; | |
336 | ||
337 | ||
338 | xid = GetXid(); | |
4523cc30 | 339 | if (pTcon) { |
1da177e4 LT |
340 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); |
341 | } else { | |
342 | return -EIO; | |
343 | } | |
344 | ||
345 | FreeXid(xid); | |
346 | return rc; | |
347 | } | |
348 | ||
349 | int cifs_xquota_get(struct super_block * sb, int quota_type, qid_t qid, | |
350 | struct fs_disk_quota * pdquota) | |
351 | { | |
352 | int xid; | |
353 | int rc = 0; | |
354 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
355 | struct cifsTconInfo *pTcon; | |
356 | ||
4523cc30 | 357 | if (cifs_sb) |
1da177e4 LT |
358 | pTcon = cifs_sb->tcon; |
359 | else | |
360 | return -EIO; | |
361 | ||
362 | xid = GetXid(); | |
4523cc30 | 363 | if (pTcon) { |
1da177e4 LT |
364 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); |
365 | } else { | |
366 | rc = -EIO; | |
367 | } | |
368 | ||
369 | FreeXid(xid); | |
370 | return rc; | |
371 | } | |
372 | ||
373 | int cifs_xstate_set(struct super_block * sb, unsigned int flags, int operation) | |
374 | { | |
375 | int xid; | |
376 | int rc = 0; | |
377 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
378 | struct cifsTconInfo *pTcon; | |
379 | ||
4523cc30 | 380 | if (cifs_sb) |
1da177e4 LT |
381 | pTcon = cifs_sb->tcon; |
382 | else | |
383 | return -EIO; | |
384 | ||
385 | xid = GetXid(); | |
4523cc30 | 386 | if (pTcon) { |
1da177e4 LT |
387 | cFYI(1,("flags: 0x%x operation: 0x%x",flags,operation)); |
388 | } else { | |
389 | rc = -EIO; | |
390 | } | |
391 | ||
392 | FreeXid(xid); | |
393 | return rc; | |
394 | } | |
395 | ||
396 | int cifs_xstate_get(struct super_block * sb, struct fs_quota_stat *qstats) | |
397 | { | |
398 | int xid; | |
399 | int rc = 0; | |
400 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
401 | struct cifsTconInfo *pTcon; | |
402 | ||
4523cc30 | 403 | if (cifs_sb) { |
1da177e4 LT |
404 | pTcon = cifs_sb->tcon; |
405 | } else { | |
406 | return -EIO; | |
407 | } | |
408 | xid = GetXid(); | |
4523cc30 | 409 | if (pTcon) { |
1da177e4 LT |
410 | cFYI(1,("pqstats %p",qstats)); |
411 | } else { | |
412 | rc = -EIO; | |
413 | } | |
414 | ||
415 | FreeXid(xid); | |
416 | return rc; | |
417 | } | |
418 | ||
419 | static struct quotactl_ops cifs_quotactl_ops = { | |
420 | .set_xquota = cifs_xquota_set, | |
421 | .get_xquota = cifs_xquota_set, | |
422 | .set_xstate = cifs_xstate_set, | |
423 | .get_xstate = cifs_xstate_get, | |
424 | }; | |
425 | #endif | |
426 | ||
8b512d9a | 427 | static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags) |
68058e75 | 428 | { |
5e1253b5 | 429 | struct cifs_sb_info *cifs_sb; |
9e2e85f8 | 430 | struct cifsTconInfo * tcon; |
68058e75 | 431 | |
8b512d9a TM |
432 | if (!(flags & MNT_FORCE)) |
433 | return; | |
434 | cifs_sb = CIFS_SB(vfsmnt->mnt_sb); | |
4523cc30 | 435 | if (cifs_sb == NULL) |
9e2e85f8 SF |
436 | return; |
437 | ||
438 | tcon = cifs_sb->tcon; | |
4523cc30 | 439 | if (tcon == NULL) |
9e2e85f8 | 440 | return; |
5e1253b5 SF |
441 | down(&tcon->tconSem); |
442 | if (atomic_read(&tcon->useCount) == 1) | |
443 | tcon->tidStatus = CifsExiting; | |
444 | up(&tcon->tconSem); | |
445 | ||
3a5ff61c | 446 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 447 | /* cancel_notify_requests(tcon); */ |
4523cc30 | 448 | if (tcon->ses && tcon->ses->server) |
5e1253b5 | 449 | { |
7b7abfe3 | 450 | cFYI(1,("wake up tasks now - umount begin not complete")); |
9e2e85f8 | 451 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
452 | wake_up_all(&tcon->ses->server->response_q); |
453 | msleep(1); /* yield */ | |
454 | /* we have to kick the requests once more */ | |
455 | wake_up_all(&tcon->ses->server->response_q); | |
456 | msleep(1); | |
5e1253b5 SF |
457 | } |
458 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
459 | |
460 | return; | |
461 | } | |
68058e75 | 462 | |
bf97d287 SF |
463 | #ifdef CONFIG_CIFS_STATS2 |
464 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
465 | { | |
466 | /* BB FIXME */ | |
467 | return 0; | |
468 | } | |
469 | #endif | |
470 | ||
1da177e4 LT |
471 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
472 | { | |
473 | *flags |= MS_NODIRATIME; | |
474 | return 0; | |
475 | } | |
476 | ||
ee9b6d61 | 477 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
478 | .read_inode = cifs_read_inode, |
479 | .put_super = cifs_put_super, | |
480 | .statfs = cifs_statfs, | |
481 | .alloc_inode = cifs_alloc_inode, | |
482 | .destroy_inode = cifs_destroy_inode, | |
483 | /* .drop_inode = generic_delete_inode, | |
484 | .delete_inode = cifs_delete_inode, *//* Do not need the above two functions | |
485 | unless later we add lazy close of inodes or unless the kernel forgets to call | |
486 | us with the same number of releases (closes) as opens */ | |
487 | .show_options = cifs_show_options, | |
7b7abfe3 | 488 | .umount_begin = cifs_umount_begin, |
1da177e4 | 489 | .remount_fs = cifs_remount, |
bf97d287 | 490 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 491 | .show_stats = cifs_show_stats, |
bf97d287 | 492 | #endif |
1da177e4 LT |
493 | }; |
494 | ||
454e2398 | 495 | static int |
1da177e4 | 496 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 497 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
498 | { |
499 | int rc; | |
500 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
501 | ||
502 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
503 | ||
504 | if (IS_ERR(sb)) | |
454e2398 | 505 | return PTR_ERR(sb); |
1da177e4 LT |
506 | |
507 | sb->s_flags = flags; | |
508 | ||
9b04c997 | 509 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
510 | if (rc) { |
511 | up_write(&sb->s_umount); | |
512 | deactivate_super(sb); | |
454e2398 | 513 | return rc; |
1da177e4 LT |
514 | } |
515 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 516 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
517 | } |
518 | ||
027445c3 BP |
519 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
520 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 521 | { |
e6a00296 | 522 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
523 | ssize_t written; |
524 | ||
027445c3 | 525 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
526 | if (!CIFS_I(inode)->clientCanCacheAll) |
527 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
528 | return written; |
529 | } | |
530 | ||
c32a0b68 SF |
531 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
532 | { | |
533 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 534 | if (origin == SEEK_END) { |
030e9d81 SF |
535 | int retval; |
536 | ||
537 | /* some applications poll for the file length in this strange | |
538 | way so we must seek to end on non-oplocked files by | |
539 | setting the revalidate time to zero */ | |
c33f8d32 | 540 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 SF |
541 | |
542 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
543 | if (retval < 0) |
544 | return (loff_t)retval; | |
545 | } | |
546 | return remote_llseek(file, offset, origin); | |
547 | } | |
548 | ||
1da177e4 LT |
549 | static struct file_system_type cifs_fs_type = { |
550 | .owner = THIS_MODULE, | |
551 | .name = "cifs", | |
552 | .get_sb = cifs_get_sb, | |
553 | .kill_sb = kill_anon_super, | |
554 | /* .fs_flags */ | |
555 | }; | |
754661f1 | 556 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
557 | .create = cifs_create, |
558 | .lookup = cifs_lookup, | |
559 | .getattr = cifs_getattr, | |
560 | .unlink = cifs_unlink, | |
561 | .link = cifs_hardlink, | |
562 | .mkdir = cifs_mkdir, | |
563 | .rmdir = cifs_rmdir, | |
564 | .rename = cifs_rename, | |
565 | .permission = cifs_permission, | |
566 | /* revalidate:cifs_revalidate, */ | |
567 | .setattr = cifs_setattr, | |
568 | .symlink = cifs_symlink, | |
569 | .mknod = cifs_mknod, | |
570 | #ifdef CONFIG_CIFS_XATTR | |
571 | .setxattr = cifs_setxattr, | |
572 | .getxattr = cifs_getxattr, | |
573 | .listxattr = cifs_listxattr, | |
574 | .removexattr = cifs_removexattr, | |
575 | #endif | |
576 | }; | |
577 | ||
754661f1 | 578 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
579 | /* revalidate:cifs_revalidate, */ |
580 | .setattr = cifs_setattr, | |
581 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
582 | .rename = cifs_rename, | |
583 | .permission = cifs_permission, | |
584 | #ifdef CONFIG_CIFS_XATTR | |
585 | .setxattr = cifs_setxattr, | |
586 | .getxattr = cifs_getxattr, | |
587 | .listxattr = cifs_listxattr, | |
588 | .removexattr = cifs_removexattr, | |
589 | #endif | |
590 | }; | |
591 | ||
754661f1 | 592 | const struct inode_operations cifs_symlink_inode_ops = { |
1da177e4 LT |
593 | .readlink = generic_readlink, |
594 | .follow_link = cifs_follow_link, | |
595 | .put_link = cifs_put_link, | |
596 | .permission = cifs_permission, | |
597 | /* BB add the following two eventually */ | |
598 | /* revalidate: cifs_revalidate, | |
599 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
600 | #ifdef CONFIG_CIFS_XATTR | |
601 | .setxattr = cifs_setxattr, | |
602 | .getxattr = cifs_getxattr, | |
603 | .listxattr = cifs_listxattr, | |
604 | .removexattr = cifs_removexattr, | |
605 | #endif | |
606 | }; | |
607 | ||
4b6f5d20 | 608 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
609 | .read = do_sync_read, |
610 | .write = do_sync_write, | |
87c89dd7 SF |
611 | .aio_read = generic_file_aio_read, |
612 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
613 | .open = cifs_open, |
614 | .release = cifs_close, | |
615 | .lock = cifs_lock, | |
616 | .fsync = cifs_fsync, | |
617 | .flush = cifs_flush, | |
618 | .mmap = cifs_file_mmap, | |
619 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 620 | .llseek = cifs_llseek, |
c67593a0 SF |
621 | #ifdef CONFIG_CIFS_POSIX |
622 | .ioctl = cifs_ioctl, | |
623 | #endif /* CONFIG_CIFS_POSIX */ | |
624 | ||
1da177e4 | 625 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
626 | .dir_notify = cifs_dir_notify, |
627 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
628 | }; | |
629 | ||
4b6f5d20 | 630 | const struct file_operations cifs_file_direct_ops = { |
1da177e4 LT |
631 | /* no mmap, no aio, no readv - |
632 | BB reevaluate whether they can be done with directio, no cache */ | |
633 | .read = cifs_user_read, | |
634 | .write = cifs_user_write, | |
635 | .open = cifs_open, | |
636 | .release = cifs_close, | |
637 | .lock = cifs_lock, | |
638 | .fsync = cifs_fsync, | |
639 | .flush = cifs_flush, | |
640 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
c67593a0 SF |
641 | #ifdef CONFIG_CIFS_POSIX |
642 | .ioctl = cifs_ioctl, | |
643 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 644 | .llseek = cifs_llseek, |
1da177e4 LT |
645 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
646 | .dir_notify = cifs_dir_notify, | |
647 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
648 | }; | |
4b6f5d20 | 649 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
650 | .read = do_sync_read, |
651 | .write = do_sync_write, | |
87c89dd7 SF |
652 | .aio_read = generic_file_aio_read, |
653 | .aio_write = cifs_file_aio_write, | |
654 | .open = cifs_open, | |
655 | .release = cifs_close, | |
656 | .fsync = cifs_fsync, | |
657 | .flush = cifs_flush, | |
658 | .mmap = cifs_file_mmap, | |
659 | .sendfile = generic_file_sendfile, | |
c32a0b68 | 660 | .llseek = cifs_llseek, |
8b94bcb9 | 661 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 662 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
663 | #endif /* CONFIG_CIFS_POSIX */ |
664 | ||
665 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 666 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
667 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
668 | }; | |
669 | ||
4b6f5d20 | 670 | const struct file_operations cifs_file_direct_nobrl_ops = { |
87c89dd7 SF |
671 | /* no mmap, no aio, no readv - |
672 | BB reevaluate whether they can be done with directio, no cache */ | |
673 | .read = cifs_user_read, | |
674 | .write = cifs_user_write, | |
675 | .open = cifs_open, | |
676 | .release = cifs_close, | |
677 | .fsync = cifs_fsync, | |
678 | .flush = cifs_flush, | |
679 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
8b94bcb9 | 680 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 681 | .ioctl = cifs_ioctl, |
8b94bcb9 | 682 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 683 | .llseek = cifs_llseek, |
8b94bcb9 | 684 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 685 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
686 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
687 | }; | |
1da177e4 | 688 | |
4b6f5d20 | 689 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
690 | .readdir = cifs_readdir, |
691 | .release = cifs_closedir, | |
692 | .read = generic_read_dir, | |
693 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
694 | .dir_notify = cifs_dir_notify, | |
695 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
f28ac91b | 696 | .ioctl = cifs_ioctl, |
1da177e4 LT |
697 | }; |
698 | ||
699 | static void | |
e18b890b | 700 | cifs_init_once(void *inode, struct kmem_cache * cachep, unsigned long flags) |
1da177e4 LT |
701 | { |
702 | struct cifsInodeInfo *cifsi = inode; | |
703 | ||
a35afb83 CL |
704 | inode_init_once(&cifsi->vfs_inode); |
705 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
706 | } |
707 | ||
708 | static int | |
709 | cifs_init_inodecache(void) | |
710 | { | |
711 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
712 | sizeof (struct cifsInodeInfo), | |
fffb60f9 PJ |
713 | 0, (SLAB_RECLAIM_ACCOUNT| |
714 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
715 | cifs_init_once, NULL); |
716 | if (cifs_inode_cachep == NULL) | |
717 | return -ENOMEM; | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | static void | |
723 | cifs_destroy_inodecache(void) | |
724 | { | |
1a1d92c1 | 725 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
726 | } |
727 | ||
728 | static int | |
729 | cifs_init_request_bufs(void) | |
730 | { | |
4523cc30 | 731 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
732 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
733 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
734 | CIFSMaxBufSize = 8192; | |
735 | } else if (CIFSMaxBufSize > 1024*127) { | |
736 | CIFSMaxBufSize = 1024 * 127; | |
737 | } else { | |
738 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
739 | } | |
740 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
741 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
742 | CIFSMaxBufSize + | |
743 | MAX_CIFS_HDR_SIZE, 0, | |
744 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
745 | if (cifs_req_cachep == NULL) | |
746 | return -ENOMEM; | |
747 | ||
4523cc30 | 748 | if (cifs_min_rcv < 1) |
1da177e4 LT |
749 | cifs_min_rcv = 1; |
750 | else if (cifs_min_rcv > 64) { | |
751 | cifs_min_rcv = 64; | |
752 | cERROR(1,("cifs_min_rcv set to maximum (64)")); | |
753 | } | |
754 | ||
93d2341c MD |
755 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
756 | cifs_req_cachep); | |
1da177e4 | 757 | |
4523cc30 | 758 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
759 | kmem_cache_destroy(cifs_req_cachep); |
760 | return -ENOMEM; | |
761 | } | |
ec637e3f | 762 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
763 | almost all handle based requests (but not write response, nor is it |
764 | sufficient for path based requests). A smaller size would have | |
765 | been more efficient (compacting multiple slab items on one 4k page) | |
766 | for the case in which debug was on, but this larger size allows | |
767 | more SMBs to use small buffer alloc and is still much more | |
768 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
769 | alloc of large cifs buffers even when page debugging is on */ | |
770 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
ec637e3f SF |
771 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
772 | NULL, NULL); | |
1da177e4 LT |
773 | if (cifs_sm_req_cachep == NULL) { |
774 | mempool_destroy(cifs_req_poolp); | |
775 | kmem_cache_destroy(cifs_req_cachep); | |
776 | return -ENOMEM; | |
777 | } | |
778 | ||
4523cc30 | 779 | if (cifs_min_small < 2) |
1da177e4 LT |
780 | cifs_min_small = 2; |
781 | else if (cifs_min_small > 256) { | |
782 | cifs_min_small = 256; | |
783 | cFYI(1,("cifs_min_small set to maximum (256)")); | |
784 | } | |
785 | ||
93d2341c MD |
786 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
787 | cifs_sm_req_cachep); | |
1da177e4 | 788 | |
4523cc30 | 789 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
790 | mempool_destroy(cifs_req_poolp); |
791 | kmem_cache_destroy(cifs_req_cachep); | |
792 | kmem_cache_destroy(cifs_sm_req_cachep); | |
793 | return -ENOMEM; | |
794 | } | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | static void | |
800 | cifs_destroy_request_bufs(void) | |
801 | { | |
802 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 803 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 804 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 805 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
806 | } |
807 | ||
808 | static int | |
809 | cifs_init_mids(void) | |
810 | { | |
811 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
812 | sizeof (struct mid_q_entry), 0, | |
813 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
814 | if (cifs_mid_cachep == NULL) | |
815 | return -ENOMEM; | |
816 | ||
93d2341c MD |
817 | /* 3 is a reasonable minimum number of simultaneous operations */ |
818 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 819 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
820 | kmem_cache_destroy(cifs_mid_cachep); |
821 | return -ENOMEM; | |
822 | } | |
823 | ||
824 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
825 | sizeof (struct oplock_q_entry), 0, | |
826 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
827 | if (cifs_oplock_cachep == NULL) { | |
1da177e4 | 828 | mempool_destroy(cifs_mid_poolp); |
e6985c7f | 829 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
830 | return -ENOMEM; |
831 | } | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | static void | |
837 | cifs_destroy_mids(void) | |
838 | { | |
839 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
840 | kmem_cache_destroy(cifs_mid_cachep); |
841 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
842 | } |
843 | ||
844 | static int cifs_oplock_thread(void * dummyarg) | |
845 | { | |
846 | struct oplock_q_entry * oplock_item; | |
847 | struct cifsTconInfo *pTcon; | |
848 | struct inode * inode; | |
849 | __u16 netfid; | |
850 | int rc; | |
851 | ||
1da177e4 | 852 | do { |
ede1327e SF |
853 | if (try_to_freeze()) |
854 | continue; | |
1da177e4 | 855 | |
1da177e4 | 856 | spin_lock(&GlobalMid_Lock); |
4523cc30 | 857 | if (list_empty(&GlobalOplock_Q)) { |
1da177e4 LT |
858 | spin_unlock(&GlobalMid_Lock); |
859 | set_current_state(TASK_INTERRUPTIBLE); | |
860 | schedule_timeout(39*HZ); | |
861 | } else { | |
862 | oplock_item = list_entry(GlobalOplock_Q.next, | |
863 | struct oplock_q_entry, qhead); | |
4523cc30 | 864 | if (oplock_item) { |
1da177e4 LT |
865 | cFYI(1,("found oplock item to write out")); |
866 | pTcon = oplock_item->tcon; | |
867 | inode = oplock_item->pinode; | |
868 | netfid = oplock_item->netfid; | |
869 | spin_unlock(&GlobalMid_Lock); | |
870 | DeleteOplockQEntry(oplock_item); | |
871 | /* can not grab inode sem here since it would | |
872 | deadlock when oplock received on delete | |
1b1dcc1b | 873 | since vfs_unlink holds the i_mutex across |
1da177e4 | 874 | the call */ |
1b1dcc1b | 875 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 LT |
876 | if (S_ISREG(inode->i_mode)) { |
877 | rc = filemap_fdatawrite(inode->i_mapping); | |
4523cc30 | 878 | if (CIFS_I(inode)->clientCanCacheRead == 0) { |
1da177e4 LT |
879 | filemap_fdatawait(inode->i_mapping); |
880 | invalidate_remote_inode(inode); | |
881 | } | |
882 | } else | |
883 | rc = 0; | |
1b1dcc1b | 884 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
885 | if (rc) |
886 | CIFS_I(inode)->write_behind_rc = rc; | |
887 | cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); | |
888 | ||
889 | /* releasing a stale oplock after recent reconnection | |
890 | of smb session using a now incorrect file | |
891 | handle is not a data integrity issue but do | |
892 | not bother sending an oplock release if session | |
893 | to server still is disconnected since oplock | |
894 | already released by the server in that case */ | |
4523cc30 | 895 | if (pTcon->tidStatus != CifsNeedReconnect) { |
1da177e4 LT |
896 | rc = CIFSSMBLock(0, pTcon, netfid, |
897 | 0 /* len */ , 0 /* offset */, 0, | |
898 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
899 | 0 /* wait flag */); | |
900 | cFYI(1,("Oplock release rc = %d ",rc)); | |
901 | } | |
902 | } else | |
903 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
904 | set_current_state(TASK_INTERRUPTIBLE); |
905 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 906 | } |
45af7a0f SF |
907 | } while (!kthread_should_stop()); |
908 | ||
909 | return 0; | |
1da177e4 LT |
910 | } |
911 | ||
8d0d5094 SF |
912 | static int cifs_dnotify_thread(void * dummyarg) |
913 | { | |
6ab16d24 SF |
914 | struct list_head *tmp; |
915 | struct cifsSesInfo *ses; | |
916 | ||
8d0d5094 | 917 | do { |
0fd1ffe0 | 918 | if (try_to_freeze()) |
16abbecd | 919 | continue; |
8d0d5094 | 920 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
921 | schedule_timeout(15*HZ); |
922 | read_lock(&GlobalSMBSeslock); | |
923 | /* check if any stuck requests that need | |
924 | to be woken up and wakeq so the | |
925 | thread can wake up and error out */ | |
926 | list_for_each(tmp, &GlobalSMBSessionList) { | |
927 | ses = list_entry(tmp, struct cifsSesInfo, | |
928 | cifsSessionList); | |
4523cc30 | 929 | if (ses && ses->server && |
2a138ebb | 930 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
931 | wake_up_all(&ses->server->response_q); |
932 | } | |
933 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
934 | } while (!kthread_should_stop()); |
935 | ||
936 | return 0; | |
1da177e4 LT |
937 | } |
938 | ||
939 | static int __init | |
940 | init_cifs(void) | |
941 | { | |
942 | int rc = 0; | |
943 | #ifdef CONFIG_PROC_FS | |
944 | cifs_proc_init(); | |
945 | #endif | |
2cd646a2 | 946 | /* INIT_LIST_HEAD(&GlobalServerList);*/ /* BB not implemented yet */ |
1da177e4 LT |
947 | INIT_LIST_HEAD(&GlobalSMBSessionList); |
948 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
949 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
950 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
951 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
952 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
953 | #endif | |
1da177e4 LT |
954 | /* |
955 | * Initialize Global counters | |
956 | */ | |
957 | atomic_set(&sesInfoAllocCount, 0); | |
958 | atomic_set(&tconInfoAllocCount, 0); | |
959 | atomic_set(&tcpSesAllocCount,0); | |
960 | atomic_set(&tcpSesReconnectCount, 0); | |
961 | atomic_set(&tconInfoReconnectCount, 0); | |
962 | ||
963 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
964 | atomic_set(&smBufAllocCount, 0); |
965 | #ifdef CONFIG_CIFS_STATS2 | |
966 | atomic_set(&totBufAllocCount, 0); | |
967 | atomic_set(&totSmBufAllocCount, 0); | |
968 | #endif /* CONFIG_CIFS_STATS2 */ | |
969 | ||
1da177e4 LT |
970 | atomic_set(&midCount, 0); |
971 | GlobalCurrentXid = 0; | |
972 | GlobalTotalActiveXid = 0; | |
973 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 974 | memset(Local_System_Name, 0, 15); |
1da177e4 LT |
975 | rwlock_init(&GlobalSMBSeslock); |
976 | spin_lock_init(&GlobalMid_Lock); | |
977 | ||
4523cc30 | 978 | if (cifs_max_pending < 2) { |
1da177e4 LT |
979 | cifs_max_pending = 2; |
980 | cFYI(1,("cifs_max_pending set to min of 2")); | |
4523cc30 | 981 | } else if (cifs_max_pending > 256) { |
1da177e4 LT |
982 | cifs_max_pending = 256; |
983 | cFYI(1,("cifs_max_pending set to max of 256")); | |
984 | } | |
985 | ||
986 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
987 | if (rc) |
988 | goto out_clean_proc; | |
989 | ||
990 | rc = cifs_init_mids(); | |
991 | if (rc) | |
992 | goto out_destroy_inodecache; | |
993 | ||
994 | rc = cifs_init_request_bufs(); | |
995 | if (rc) | |
996 | goto out_destroy_mids; | |
997 | ||
998 | rc = register_filesystem(&cifs_fs_type); | |
999 | if (rc) | |
1000 | goto out_destroy_request_bufs; | |
1001 | ||
1002 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); | |
1003 | if (IS_ERR(oplockThread)) { | |
1004 | rc = PTR_ERR(oplockThread); | |
1005 | cERROR(1,("error %d create oplock thread", rc)); | |
1006 | goto out_unregister_filesystem; | |
1da177e4 | 1007 | } |
45af7a0f SF |
1008 | |
1009 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1010 | if (IS_ERR(dnotifyThread)) { | |
1011 | rc = PTR_ERR(dnotifyThread); | |
1012 | cERROR(1,("error %d create dnotify thread", rc)); | |
1013 | goto out_stop_oplock_thread; | |
1014 | } | |
1015 | ||
1016 | return 0; | |
1017 | ||
1018 | out_stop_oplock_thread: | |
1019 | kthread_stop(oplockThread); | |
1020 | out_unregister_filesystem: | |
1021 | unregister_filesystem(&cifs_fs_type); | |
1022 | out_destroy_request_bufs: | |
1023 | cifs_destroy_request_bufs(); | |
1024 | out_destroy_mids: | |
1025 | cifs_destroy_mids(); | |
1026 | out_destroy_inodecache: | |
1027 | cifs_destroy_inodecache(); | |
1028 | out_clean_proc: | |
1da177e4 LT |
1029 | #ifdef CONFIG_PROC_FS |
1030 | cifs_proc_clean(); | |
1031 | #endif | |
1032 | return rc; | |
1033 | } | |
1034 | ||
1035 | static void __exit | |
1036 | exit_cifs(void) | |
1037 | { | |
1038 | cFYI(0, ("In unregister ie exit_cifs")); | |
1039 | #ifdef CONFIG_PROC_FS | |
1040 | cifs_proc_clean(); | |
1041 | #endif | |
1042 | unregister_filesystem(&cifs_fs_type); | |
1043 | cifs_destroy_inodecache(); | |
1044 | cifs_destroy_mids(); | |
1045 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1046 | kthread_stop(oplockThread); |
1047 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1048 | } |
1049 | ||
1050 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
1051 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ | |
1052 | MODULE_DESCRIPTION | |
1053 | ("VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows"); | |
1054 | MODULE_VERSION(CIFS_VERSION); | |
1055 | module_init(init_cifs) | |
1056 | module_exit(exit_cifs) |