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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 | ||
1da177e4 LT |
52 | int cifsFYI = 0; |
53 | int cifsERROR = 1; | |
54 | int traceSMB = 0; | |
55 | unsigned int oplockEnabled = 1; | |
56 | unsigned int experimEnabled = 0; | |
57 | unsigned int linuxExtEnabled = 1; | |
58 | unsigned int lookupCacheEnabled = 1; | |
59 | unsigned int multiuser_mount = 0; | |
3979877e SF |
60 | unsigned int extended_security = CIFSSEC_DEF; |
61 | /* unsigned int ntlmv2_support = 0; */ | |
1da177e4 | 62 | unsigned int sign_CIFS_PDUs = 1; |
6dc0f87e SF |
63 | extern struct task_struct *oplockThread; /* remove sparse warning */ |
64 | struct task_struct *oplockThread = NULL; | |
99ee4dbd | 65 | /* extern struct task_struct * dnotifyThread; remove sparse warning */ |
6dc0f87e | 66 | static struct task_struct *dnotifyThread = NULL; |
ee9b6d61 | 67 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
68 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
69 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
70 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
71 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
72 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
73 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
74 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
75 | "1 to 64"); | |
1da177e4 LT |
76 | unsigned int cifs_min_small = 30; |
77 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
78 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
79 | "Range: 2 to 256"); | |
1da177e4 LT |
80 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
81 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
82 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
83 | "Default: 50 Range: 2 to 256"); | |
1da177e4 | 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; | |
50c2f753 | 98 | |
1b2b2126 SF |
99 | /* BB should we make this contingent on mount parm? */ |
100 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 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; | |
4523cc30 | 117 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
790fe579 SF |
118 | sb->s_blocksize = |
119 | cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
1da177e4 LT |
120 | #ifdef CONFIG_CIFS_QUOTA |
121 | sb->s_qcop = &cifs_quotactl_ops; | |
122 | #endif | |
123 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
124 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
125 | inode = iget(sb, ROOT_I); | |
126 | ||
127 | if (!inode) { | |
128 | rc = -ENOMEM; | |
129 | goto out_no_root; | |
130 | } | |
131 | ||
132 | sb->s_root = d_alloc_root(inode); | |
133 | ||
134 | if (!sb->s_root) { | |
135 | rc = -ENOMEM; | |
136 | goto out_no_root; | |
137 | } | |
50c2f753 | 138 | |
7521a3c5 SF |
139 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
140 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
141 | cFYI(1, ("export ops supported")); | |
142 | sb->s_export_op = &cifs_export_ops; | |
143 | } | |
144 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
145 | |
146 | return 0; | |
147 | ||
148 | out_no_root: | |
149 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
150 | if (inode) | |
151 | iput(inode); | |
152 | ||
153 | out_mount_failed: | |
4523cc30 SF |
154 | if (cifs_sb) { |
155 | if (cifs_sb->local_nls) | |
50c2f753 | 156 | unload_nls(cifs_sb->local_nls); |
1da177e4 LT |
157 | kfree(cifs_sb); |
158 | } | |
159 | return rc; | |
160 | } | |
161 | ||
162 | static void | |
163 | cifs_put_super(struct super_block *sb) | |
164 | { | |
165 | int rc = 0; | |
166 | struct cifs_sb_info *cifs_sb; | |
167 | ||
168 | cFYI(1, ("In cifs_put_super")); | |
169 | cifs_sb = CIFS_SB(sb); | |
4523cc30 | 170 | if (cifs_sb == NULL) { |
790fe579 | 171 | cFYI(1, ("Empty cifs superblock info passed to unmount")); |
1da177e4 LT |
172 | return; |
173 | } | |
790fe579 | 174 | rc = cifs_umount(sb, cifs_sb); |
1da177e4 LT |
175 | if (rc) { |
176 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
177 | } | |
178 | unload_nls(cifs_sb->local_nls); | |
179 | kfree(cifs_sb); | |
180 | return; | |
181 | } | |
182 | ||
183 | static int | |
726c3342 | 184 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 185 | { |
726c3342 | 186 | struct super_block *sb = dentry->d_sb; |
790fe579 | 187 | int xid; |
c81156dd | 188 | int rc = -EOPNOTSUPP; |
1da177e4 LT |
189 | struct cifs_sb_info *cifs_sb; |
190 | struct cifsTconInfo *pTcon; | |
191 | ||
192 | xid = GetXid(); | |
193 | ||
194 | cifs_sb = CIFS_SB(sb); | |
195 | pTcon = cifs_sb->tcon; | |
196 | ||
197 | buf->f_type = CIFS_MAGIC_NUMBER; | |
198 | ||
199 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ | |
790fe579 | 200 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
c81156dd SF |
201 | presumably be total path, but note |
202 | that some servers (includinng Samba 3) | |
203 | have a shorter maximum path */ | |
1da177e4 LT |
204 | buf->f_files = 0; /* undefined */ |
205 | buf->f_ffree = 0; /* unlimited */ | |
206 | ||
1da177e4 | 207 | /* BB we could add a second check for a QFS Unix capability bit */ |
f28ac91b | 208 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
209 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
210 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 211 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
212 | |
213 | /* Only need to call the old QFSInfo if failed | |
214 | on newer one */ | |
4523cc30 SF |
215 | if (rc) |
216 | if (pTcon->ses->capabilities & CAP_NT_SMBS) | |
9ac00b7d | 217 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); /* not supported by OS2 */ |
1da177e4 | 218 | |
9ac00b7d SF |
219 | /* Some old Windows servers also do not support level 103, retry with |
220 | older level one if old server failed the previous call or we | |
221 | bypassed it because we detected that this was an older LANMAN sess */ | |
4523cc30 | 222 | if (rc) |
20962438 | 223 | rc = SMBOldQFSInfo(xid, pTcon, buf); |
790fe579 | 224 | /* int f_type; |
1da177e4 LT |
225 | __fsid_t f_fsid; |
226 | int f_namelen; */ | |
c81156dd | 227 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 228 | FreeXid(xid); |
c81156dd SF |
229 | return 0; /* always return success? what if volume is no |
230 | longer available? */ | |
1da177e4 LT |
231 | } |
232 | ||
50c2f753 | 233 | static int cifs_permission(struct inode *inode, int mask, struct nameidata *nd) |
1da177e4 LT |
234 | { |
235 | struct cifs_sb_info *cifs_sb; | |
236 | ||
237 | cifs_sb = CIFS_SB(inode->i_sb); | |
238 | ||
26f57364 | 239 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1da177e4 | 240 | return 0; |
26f57364 | 241 | else /* file mode might have been restricted at mount time |
50c2f753 | 242 | on the client (above and beyond ACL on servers) for |
1da177e4 | 243 | servers which do not support setting and viewing mode bits, |
50c2f753 | 244 | so allowing client to check permissions is useful */ |
1da177e4 LT |
245 | return generic_permission(inode, mask, NULL); |
246 | } | |
247 | ||
e18b890b CL |
248 | static struct kmem_cache *cifs_inode_cachep; |
249 | static struct kmem_cache *cifs_req_cachep; | |
250 | static struct kmem_cache *cifs_mid_cachep; | |
251 | struct kmem_cache *cifs_oplock_cachep; | |
252 | static struct kmem_cache *cifs_sm_req_cachep; | |
1da177e4 LT |
253 | mempool_t *cifs_sm_req_poolp; |
254 | mempool_t *cifs_req_poolp; | |
255 | mempool_t *cifs_mid_poolp; | |
256 | ||
257 | static struct inode * | |
258 | cifs_alloc_inode(struct super_block *sb) | |
259 | { | |
260 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 261 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
262 | if (!cifs_inode) |
263 | return NULL; | |
264 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
265 | atomic_set(&cifs_inode->inUse, 0); | |
266 | cifs_inode->time = 0; | |
267 | /* Until the file is open and we have gotten oplock | |
268 | info back from the server, can not assume caching of | |
269 | file data or metadata */ | |
270 | cifs_inode->clientCanCacheRead = FALSE; | |
271 | cifs_inode->clientCanCacheAll = FALSE; | |
1da177e4 | 272 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
50c2f753 | 273 | |
1b2b2126 SF |
274 | /* Can not set i_flags here - they get immediately overwritten |
275 | to zero by the VFS */ | |
276 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
277 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
278 | return &cifs_inode->vfs_inode; | |
279 | } | |
280 | ||
281 | static void | |
282 | cifs_destroy_inode(struct inode *inode) | |
283 | { | |
284 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
285 | } | |
286 | ||
287 | /* | |
288 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
289 | * Not all settable options are displayed but most of the important | |
290 | * ones are. | |
291 | */ | |
292 | static int | |
293 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
294 | { | |
295 | struct cifs_sb_info *cifs_sb; | |
296 | ||
297 | cifs_sb = CIFS_SB(m->mnt_sb); | |
298 | ||
299 | if (cifs_sb) { | |
300 | if (cifs_sb->tcon) { | |
004c46b9 | 301 | /* BB add prepath to mount options displayed */ |
1da177e4 LT |
302 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); |
303 | if (cifs_sb->tcon->ses) { | |
304 | if (cifs_sb->tcon->ses->userName) | |
305 | seq_printf(s, ",username=%s", | |
306 | cifs_sb->tcon->ses->userName); | |
4523cc30 | 307 | if (cifs_sb->tcon->ses->domainName) |
1da177e4 LT |
308 | seq_printf(s, ",domain=%s", |
309 | cifs_sb->tcon->ses->domainName); | |
310 | } | |
311 | } | |
4523cc30 SF |
312 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
313 | seq_printf(s, ",posixpaths"); | |
314 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) || | |
c18c842b | 315 | !(cifs_sb->tcon->unix_ext)) |
4523cc30 SF |
316 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
317 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) || | |
c18c842b | 318 | !(cifs_sb->tcon->unix_ext)) |
4523cc30 | 319 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
50c2f753 SF |
320 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); |
321 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
1da177e4 LT |
322 | } |
323 | return 0; | |
324 | } | |
325 | ||
326 | #ifdef CONFIG_CIFS_QUOTA | |
50c2f753 SF |
327 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, |
328 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
329 | { |
330 | int xid; | |
331 | int rc = 0; | |
332 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
333 | struct cifsTconInfo *pTcon; | |
50c2f753 | 334 | |
4523cc30 | 335 | if (cifs_sb) |
1da177e4 LT |
336 | pTcon = cifs_sb->tcon; |
337 | else | |
338 | return -EIO; | |
339 | ||
340 | ||
341 | xid = GetXid(); | |
4523cc30 | 342 | if (pTcon) { |
50c2f753 | 343 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 | 344 | } else { |
95ba7362 | 345 | rc = -EIO; |
1da177e4 LT |
346 | } |
347 | ||
348 | FreeXid(xid); | |
349 | return rc; | |
350 | } | |
351 | ||
50c2f753 SF |
352 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, |
353 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
354 | { |
355 | int xid; | |
356 | int rc = 0; | |
357 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
358 | struct cifsTconInfo *pTcon; | |
359 | ||
4523cc30 | 360 | if (cifs_sb) |
1da177e4 LT |
361 | pTcon = cifs_sb->tcon; |
362 | else | |
363 | return -EIO; | |
364 | ||
365 | xid = GetXid(); | |
4523cc30 | 366 | if (pTcon) { |
50c2f753 | 367 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 LT |
368 | } else { |
369 | rc = -EIO; | |
370 | } | |
371 | ||
372 | FreeXid(xid); | |
373 | return rc; | |
374 | } | |
375 | ||
50c2f753 | 376 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) |
1da177e4 | 377 | { |
50c2f753 | 378 | int xid; |
1da177e4 LT |
379 | int rc = 0; |
380 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
381 | struct cifsTconInfo *pTcon; | |
382 | ||
4523cc30 | 383 | if (cifs_sb) |
1da177e4 LT |
384 | pTcon = cifs_sb->tcon; |
385 | else | |
386 | return -EIO; | |
387 | ||
388 | xid = GetXid(); | |
4523cc30 | 389 | if (pTcon) { |
50c2f753 | 390 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); |
1da177e4 LT |
391 | } else { |
392 | rc = -EIO; | |
393 | } | |
394 | ||
395 | FreeXid(xid); | |
396 | return rc; | |
397 | } | |
398 | ||
50c2f753 | 399 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) |
1da177e4 LT |
400 | { |
401 | int xid; | |
402 | int rc = 0; | |
403 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
404 | struct cifsTconInfo *pTcon; | |
405 | ||
4523cc30 | 406 | if (cifs_sb) { |
1da177e4 LT |
407 | pTcon = cifs_sb->tcon; |
408 | } else { | |
409 | return -EIO; | |
410 | } | |
411 | xid = GetXid(); | |
4523cc30 | 412 | if (pTcon) { |
50c2f753 | 413 | cFYI(1, ("pqstats %p", qstats)); |
1da177e4 LT |
414 | } else { |
415 | rc = -EIO; | |
416 | } | |
417 | ||
418 | FreeXid(xid); | |
419 | return rc; | |
420 | } | |
421 | ||
422 | static struct quotactl_ops cifs_quotactl_ops = { | |
423 | .set_xquota = cifs_xquota_set, | |
424 | .get_xquota = cifs_xquota_set, | |
425 | .set_xstate = cifs_xstate_set, | |
426 | .get_xstate = cifs_xstate_get, | |
427 | }; | |
428 | #endif | |
429 | ||
50c2f753 | 430 | static void cifs_umount_begin(struct vfsmount *vfsmnt, int flags) |
68058e75 | 431 | { |
5e1253b5 | 432 | struct cifs_sb_info *cifs_sb; |
50c2f753 | 433 | struct cifsTconInfo *tcon; |
68058e75 | 434 | |
8b512d9a TM |
435 | if (!(flags & MNT_FORCE)) |
436 | return; | |
437 | cifs_sb = CIFS_SB(vfsmnt->mnt_sb); | |
4523cc30 | 438 | if (cifs_sb == NULL) |
9e2e85f8 SF |
439 | return; |
440 | ||
441 | tcon = cifs_sb->tcon; | |
4523cc30 | 442 | if (tcon == NULL) |
9e2e85f8 | 443 | return; |
5e1253b5 SF |
444 | down(&tcon->tconSem); |
445 | if (atomic_read(&tcon->useCount) == 1) | |
446 | tcon->tidStatus = CifsExiting; | |
447 | up(&tcon->tconSem); | |
448 | ||
3a5ff61c | 449 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 450 | /* cancel_notify_requests(tcon); */ |
50c2f753 SF |
451 | if (tcon->ses && tcon->ses->server) { |
452 | cFYI(1, ("wake up tasks now - umount begin not complete")); | |
9e2e85f8 | 453 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
454 | wake_up_all(&tcon->ses->server->response_q); |
455 | msleep(1); /* yield */ | |
456 | /* we have to kick the requests once more */ | |
457 | wake_up_all(&tcon->ses->server->response_q); | |
458 | msleep(1); | |
5e1253b5 SF |
459 | } |
460 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
461 | |
462 | return; | |
463 | } | |
68058e75 | 464 | |
bf97d287 SF |
465 | #ifdef CONFIG_CIFS_STATS2 |
466 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
467 | { | |
468 | /* BB FIXME */ | |
469 | return 0; | |
470 | } | |
471 | #endif | |
472 | ||
1da177e4 LT |
473 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
474 | { | |
475 | *flags |= MS_NODIRATIME; | |
476 | return 0; | |
477 | } | |
478 | ||
ee9b6d61 | 479 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
480 | .read_inode = cifs_read_inode, |
481 | .put_super = cifs_put_super, | |
482 | .statfs = cifs_statfs, | |
483 | .alloc_inode = cifs_alloc_inode, | |
484 | .destroy_inode = cifs_destroy_inode, | |
50c2f753 SF |
485 | /* .drop_inode = generic_delete_inode, |
486 | .delete_inode = cifs_delete_inode, */ /* Do not need above two | |
487 | functions unless later we add lazy close of inodes or unless the | |
488 | kernel forgets to call us with the same number of releases (closes) | |
489 | as opens */ | |
1da177e4 | 490 | .show_options = cifs_show_options, |
7b7abfe3 | 491 | .umount_begin = cifs_umount_begin, |
1da177e4 | 492 | .remount_fs = cifs_remount, |
bf97d287 | 493 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 494 | .show_stats = cifs_show_stats, |
bf97d287 | 495 | #endif |
1da177e4 LT |
496 | }; |
497 | ||
454e2398 | 498 | static int |
1da177e4 | 499 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 500 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
501 | { |
502 | int rc; | |
503 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
504 | ||
505 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
506 | ||
507 | if (IS_ERR(sb)) | |
454e2398 | 508 | return PTR_ERR(sb); |
1da177e4 LT |
509 | |
510 | sb->s_flags = flags; | |
511 | ||
9b04c997 | 512 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
513 | if (rc) { |
514 | up_write(&sb->s_umount); | |
515 | deactivate_super(sb); | |
454e2398 | 516 | return rc; |
1da177e4 LT |
517 | } |
518 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 519 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
520 | } |
521 | ||
027445c3 BP |
522 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
523 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 524 | { |
e6a00296 | 525 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
526 | ssize_t written; |
527 | ||
027445c3 | 528 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
529 | if (!CIFS_I(inode)->clientCanCacheAll) |
530 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
531 | return written; |
532 | } | |
533 | ||
c32a0b68 SF |
534 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
535 | { | |
536 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 537 | if (origin == SEEK_END) { |
030e9d81 SF |
538 | int retval; |
539 | ||
540 | /* some applications poll for the file length in this strange | |
541 | way so we must seek to end on non-oplocked files by | |
542 | setting the revalidate time to zero */ | |
c33f8d32 | 543 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 SF |
544 | |
545 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
546 | if (retval < 0) |
547 | return (loff_t)retval; | |
548 | } | |
549 | return remote_llseek(file, offset, origin); | |
550 | } | |
551 | ||
1da177e4 LT |
552 | static struct file_system_type cifs_fs_type = { |
553 | .owner = THIS_MODULE, | |
554 | .name = "cifs", | |
555 | .get_sb = cifs_get_sb, | |
556 | .kill_sb = kill_anon_super, | |
557 | /* .fs_flags */ | |
558 | }; | |
754661f1 | 559 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
560 | .create = cifs_create, |
561 | .lookup = cifs_lookup, | |
562 | .getattr = cifs_getattr, | |
563 | .unlink = cifs_unlink, | |
564 | .link = cifs_hardlink, | |
565 | .mkdir = cifs_mkdir, | |
566 | .rmdir = cifs_rmdir, | |
567 | .rename = cifs_rename, | |
568 | .permission = cifs_permission, | |
569 | /* revalidate:cifs_revalidate, */ | |
570 | .setattr = cifs_setattr, | |
571 | .symlink = cifs_symlink, | |
572 | .mknod = cifs_mknod, | |
573 | #ifdef CONFIG_CIFS_XATTR | |
574 | .setxattr = cifs_setxattr, | |
575 | .getxattr = cifs_getxattr, | |
576 | .listxattr = cifs_listxattr, | |
577 | .removexattr = cifs_removexattr, | |
578 | #endif | |
579 | }; | |
580 | ||
754661f1 | 581 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
582 | /* revalidate:cifs_revalidate, */ |
583 | .setattr = cifs_setattr, | |
584 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
585 | .rename = cifs_rename, | |
586 | .permission = cifs_permission, | |
587 | #ifdef CONFIG_CIFS_XATTR | |
588 | .setxattr = cifs_setxattr, | |
589 | .getxattr = cifs_getxattr, | |
590 | .listxattr = cifs_listxattr, | |
591 | .removexattr = cifs_removexattr, | |
50c2f753 | 592 | #endif |
1da177e4 LT |
593 | }; |
594 | ||
754661f1 | 595 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 596 | .readlink = generic_readlink, |
1da177e4 LT |
597 | .follow_link = cifs_follow_link, |
598 | .put_link = cifs_put_link, | |
599 | .permission = cifs_permission, | |
600 | /* BB add the following two eventually */ | |
601 | /* revalidate: cifs_revalidate, | |
602 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
603 | #ifdef CONFIG_CIFS_XATTR | |
604 | .setxattr = cifs_setxattr, | |
605 | .getxattr = cifs_getxattr, | |
606 | .listxattr = cifs_listxattr, | |
607 | .removexattr = cifs_removexattr, | |
50c2f753 | 608 | #endif |
1da177e4 LT |
609 | }; |
610 | ||
4b6f5d20 | 611 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
612 | .read = do_sync_read, |
613 | .write = do_sync_write, | |
87c89dd7 SF |
614 | .aio_read = generic_file_aio_read, |
615 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
616 | .open = cifs_open, |
617 | .release = cifs_close, | |
618 | .lock = cifs_lock, | |
619 | .fsync = cifs_fsync, | |
620 | .flush = cifs_flush, | |
621 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 622 | .splice_read = generic_file_splice_read, |
c32a0b68 | 623 | .llseek = cifs_llseek, |
c67593a0 SF |
624 | #ifdef CONFIG_CIFS_POSIX |
625 | .ioctl = cifs_ioctl, | |
626 | #endif /* CONFIG_CIFS_POSIX */ | |
627 | ||
1da177e4 | 628 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
629 | .dir_notify = cifs_dir_notify, |
630 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
631 | }; | |
632 | ||
4b6f5d20 | 633 | const struct file_operations cifs_file_direct_ops = { |
50c2f753 | 634 | /* no mmap, no aio, no readv - |
1da177e4 LT |
635 | BB reevaluate whether they can be done with directio, no cache */ |
636 | .read = cifs_user_read, | |
637 | .write = cifs_user_write, | |
638 | .open = cifs_open, | |
639 | .release = cifs_close, | |
640 | .lock = cifs_lock, | |
641 | .fsync = cifs_fsync, | |
642 | .flush = cifs_flush, | |
5ffc4ef4 | 643 | .splice_read = generic_file_splice_read, |
c67593a0 SF |
644 | #ifdef CONFIG_CIFS_POSIX |
645 | .ioctl = cifs_ioctl, | |
646 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 647 | .llseek = cifs_llseek, |
1da177e4 LT |
648 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
649 | .dir_notify = cifs_dir_notify, | |
650 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
651 | }; | |
4b6f5d20 | 652 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
653 | .read = do_sync_read, |
654 | .write = do_sync_write, | |
87c89dd7 SF |
655 | .aio_read = generic_file_aio_read, |
656 | .aio_write = cifs_file_aio_write, | |
657 | .open = cifs_open, | |
658 | .release = cifs_close, | |
659 | .fsync = cifs_fsync, | |
660 | .flush = cifs_flush, | |
661 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 662 | .splice_read = generic_file_splice_read, |
c32a0b68 | 663 | .llseek = cifs_llseek, |
8b94bcb9 | 664 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 665 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
666 | #endif /* CONFIG_CIFS_POSIX */ |
667 | ||
668 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 669 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
670 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
671 | }; | |
672 | ||
4b6f5d20 | 673 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 674 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
675 | BB reevaluate whether they can be done with directio, no cache */ |
676 | .read = cifs_user_read, | |
677 | .write = cifs_user_write, | |
678 | .open = cifs_open, | |
679 | .release = cifs_close, | |
680 | .fsync = cifs_fsync, | |
681 | .flush = cifs_flush, | |
5ffc4ef4 | 682 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 683 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 684 | .ioctl = cifs_ioctl, |
8b94bcb9 | 685 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 686 | .llseek = cifs_llseek, |
8b94bcb9 | 687 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 688 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
689 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
690 | }; | |
1da177e4 | 691 | |
4b6f5d20 | 692 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
693 | .readdir = cifs_readdir, |
694 | .release = cifs_closedir, | |
695 | .read = generic_read_dir, | |
696 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
697 | .dir_notify = cifs_dir_notify, | |
698 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
50c2f753 | 699 | .ioctl = cifs_ioctl, |
1da177e4 LT |
700 | }; |
701 | ||
702 | static void | |
50c2f753 | 703 | cifs_init_once(void *inode, struct kmem_cache *cachep, unsigned long flags) |
1da177e4 LT |
704 | { |
705 | struct cifsInodeInfo *cifsi = inode; | |
706 | ||
a35afb83 CL |
707 | inode_init_once(&cifsi->vfs_inode); |
708 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
709 | } |
710 | ||
711 | static int | |
712 | cifs_init_inodecache(void) | |
713 | { | |
714 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 715 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
716 | 0, (SLAB_RECLAIM_ACCOUNT| |
717 | SLAB_MEM_SPREAD), | |
20c2df83 | 718 | cifs_init_once); |
1da177e4 LT |
719 | if (cifs_inode_cachep == NULL) |
720 | return -ENOMEM; | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static void | |
726 | cifs_destroy_inodecache(void) | |
727 | { | |
1a1d92c1 | 728 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
729 | } |
730 | ||
731 | static int | |
732 | cifs_init_request_bufs(void) | |
733 | { | |
4523cc30 | 734 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
735 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
736 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
737 | CIFSMaxBufSize = 8192; | |
738 | } else if (CIFSMaxBufSize > 1024*127) { | |
739 | CIFSMaxBufSize = 1024 * 127; | |
740 | } else { | |
741 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
742 | } | |
743 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
744 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
745 | CIFSMaxBufSize + | |
746 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 747 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
748 | if (cifs_req_cachep == NULL) |
749 | return -ENOMEM; | |
750 | ||
4523cc30 | 751 | if (cifs_min_rcv < 1) |
1da177e4 LT |
752 | cifs_min_rcv = 1; |
753 | else if (cifs_min_rcv > 64) { | |
754 | cifs_min_rcv = 64; | |
50c2f753 | 755 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); |
1da177e4 LT |
756 | } |
757 | ||
93d2341c MD |
758 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
759 | cifs_req_cachep); | |
1da177e4 | 760 | |
4523cc30 | 761 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
762 | kmem_cache_destroy(cifs_req_cachep); |
763 | return -ENOMEM; | |
764 | } | |
ec637e3f | 765 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
766 | almost all handle based requests (but not write response, nor is it |
767 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 768 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
769 | for the case in which debug was on, but this larger size allows |
770 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 771 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
772 | alloc of large cifs buffers even when page debugging is on */ |
773 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 774 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 775 | NULL); |
1da177e4 LT |
776 | if (cifs_sm_req_cachep == NULL) { |
777 | mempool_destroy(cifs_req_poolp); | |
778 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 779 | return -ENOMEM; |
1da177e4 LT |
780 | } |
781 | ||
4523cc30 | 782 | if (cifs_min_small < 2) |
1da177e4 LT |
783 | cifs_min_small = 2; |
784 | else if (cifs_min_small > 256) { | |
785 | cifs_min_small = 256; | |
6dc0f87e | 786 | cFYI(1, ("cifs_min_small set to maximum (256)")); |
1da177e4 LT |
787 | } |
788 | ||
93d2341c MD |
789 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
790 | cifs_sm_req_cachep); | |
1da177e4 | 791 | |
4523cc30 | 792 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
793 | mempool_destroy(cifs_req_poolp); |
794 | kmem_cache_destroy(cifs_req_cachep); | |
795 | kmem_cache_destroy(cifs_sm_req_cachep); | |
796 | return -ENOMEM; | |
797 | } | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | static void | |
803 | cifs_destroy_request_bufs(void) | |
804 | { | |
805 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 806 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 807 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 808 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
809 | } |
810 | ||
811 | static int | |
812 | cifs_init_mids(void) | |
813 | { | |
814 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
815 | sizeof(struct mid_q_entry), 0, |
816 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
817 | if (cifs_mid_cachep == NULL) |
818 | return -ENOMEM; | |
819 | ||
93d2341c MD |
820 | /* 3 is a reasonable minimum number of simultaneous operations */ |
821 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 822 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
823 | kmem_cache_destroy(cifs_mid_cachep); |
824 | return -ENOMEM; | |
825 | } | |
826 | ||
827 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
26f57364 SF |
828 | sizeof(struct oplock_q_entry), 0, |
829 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 | 830 | if (cifs_oplock_cachep == NULL) { |
1da177e4 | 831 | mempool_destroy(cifs_mid_poolp); |
e6985c7f | 832 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
833 | return -ENOMEM; |
834 | } | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
839 | static void | |
840 | cifs_destroy_mids(void) | |
841 | { | |
842 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
843 | kmem_cache_destroy(cifs_mid_cachep); |
844 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
845 | } |
846 | ||
50c2f753 | 847 | static int cifs_oplock_thread(void *dummyarg) |
1da177e4 | 848 | { |
6dc0f87e | 849 | struct oplock_q_entry *oplock_item; |
1da177e4 | 850 | struct cifsTconInfo *pTcon; |
6dc0f87e | 851 | struct inode *inode; |
1da177e4 LT |
852 | __u16 netfid; |
853 | int rc; | |
854 | ||
83144186 | 855 | set_freezable(); |
1da177e4 | 856 | do { |
6dc0f87e | 857 | if (try_to_freeze()) |
ede1327e | 858 | continue; |
50c2f753 | 859 | |
1da177e4 | 860 | spin_lock(&GlobalMid_Lock); |
4523cc30 | 861 | if (list_empty(&GlobalOplock_Q)) { |
1da177e4 LT |
862 | spin_unlock(&GlobalMid_Lock); |
863 | set_current_state(TASK_INTERRUPTIBLE); | |
864 | schedule_timeout(39*HZ); | |
865 | } else { | |
6dc0f87e | 866 | oplock_item = list_entry(GlobalOplock_Q.next, |
1da177e4 | 867 | struct oplock_q_entry, qhead); |
4523cc30 | 868 | if (oplock_item) { |
50c2f753 | 869 | cFYI(1, ("found oplock item to write out")); |
1da177e4 LT |
870 | pTcon = oplock_item->tcon; |
871 | inode = oplock_item->pinode; | |
872 | netfid = oplock_item->netfid; | |
873 | spin_unlock(&GlobalMid_Lock); | |
874 | DeleteOplockQEntry(oplock_item); | |
875 | /* can not grab inode sem here since it would | |
6dc0f87e | 876 | deadlock when oplock received on delete |
1b1dcc1b | 877 | since vfs_unlink holds the i_mutex across |
1da177e4 | 878 | the call */ |
1b1dcc1b | 879 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 | 880 | if (S_ISREG(inode->i_mode)) { |
26f57364 SF |
881 | rc = |
882 | filemap_fdatawrite(inode->i_mapping); | |
50c2f753 SF |
883 | if (CIFS_I(inode)->clientCanCacheRead |
884 | == 0) { | |
1da177e4 LT |
885 | filemap_fdatawait(inode->i_mapping); |
886 | invalidate_remote_inode(inode); | |
887 | } | |
888 | } else | |
889 | rc = 0; | |
1b1dcc1b | 890 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
891 | if (rc) |
892 | CIFS_I(inode)->write_behind_rc = rc; | |
6dc0f87e SF |
893 | cFYI(1, ("Oplock flush inode %p rc %d", |
894 | inode, rc)); | |
895 | ||
896 | /* releasing stale oplock after recent reconnect | |
897 | of smb session using a now incorrect file | |
898 | handle is not a data integrity issue but do | |
899 | not bother sending an oplock release if session | |
900 | to server still is disconnected since oplock | |
1da177e4 | 901 | already released by the server in that case */ |
4523cc30 | 902 | if (pTcon->tidStatus != CifsNeedReconnect) { |
1da177e4 | 903 | rc = CIFSSMBLock(0, pTcon, netfid, |
6dc0f87e | 904 | 0 /* len */ , 0 /* offset */, 0, |
1da177e4 LT |
905 | 0, LOCKING_ANDX_OPLOCK_RELEASE, |
906 | 0 /* wait flag */); | |
26f57364 | 907 | cFYI(1, ("Oplock release rc = %d", rc)); |
1da177e4 LT |
908 | } |
909 | } else | |
910 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
911 | set_current_state(TASK_INTERRUPTIBLE); |
912 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 913 | } |
45af7a0f SF |
914 | } while (!kthread_should_stop()); |
915 | ||
916 | return 0; | |
1da177e4 LT |
917 | } |
918 | ||
50c2f753 | 919 | static int cifs_dnotify_thread(void *dummyarg) |
8d0d5094 | 920 | { |
6ab16d24 SF |
921 | struct list_head *tmp; |
922 | struct cifsSesInfo *ses; | |
923 | ||
8d0d5094 | 924 | do { |
0fd1ffe0 | 925 | if (try_to_freeze()) |
16abbecd | 926 | continue; |
8d0d5094 | 927 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
928 | schedule_timeout(15*HZ); |
929 | read_lock(&GlobalSMBSeslock); | |
930 | /* check if any stuck requests that need | |
931 | to be woken up and wakeq so the | |
932 | thread can wake up and error out */ | |
933 | list_for_each(tmp, &GlobalSMBSessionList) { | |
6dc0f87e | 934 | ses = list_entry(tmp, struct cifsSesInfo, |
6ab16d24 | 935 | cifsSessionList); |
6dc0f87e | 936 | if (ses && ses->server && |
2a138ebb | 937 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
938 | wake_up_all(&ses->server->response_q); |
939 | } | |
940 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
941 | } while (!kthread_should_stop()); |
942 | ||
943 | return 0; | |
1da177e4 LT |
944 | } |
945 | ||
946 | static int __init | |
947 | init_cifs(void) | |
948 | { | |
949 | int rc = 0; | |
950 | #ifdef CONFIG_PROC_FS | |
951 | cifs_proc_init(); | |
952 | #endif | |
2cd646a2 | 953 | /* INIT_LIST_HEAD(&GlobalServerList);*/ /* BB not implemented yet */ |
1da177e4 LT |
954 | INIT_LIST_HEAD(&GlobalSMBSessionList); |
955 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
956 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
957 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
958 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
959 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 960 | #endif |
1da177e4 LT |
961 | /* |
962 | * Initialize Global counters | |
963 | */ | |
964 | atomic_set(&sesInfoAllocCount, 0); | |
965 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 966 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
967 | atomic_set(&tcpSesReconnectCount, 0); |
968 | atomic_set(&tconInfoReconnectCount, 0); | |
969 | ||
970 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
971 | atomic_set(&smBufAllocCount, 0); |
972 | #ifdef CONFIG_CIFS_STATS2 | |
973 | atomic_set(&totBufAllocCount, 0); | |
974 | atomic_set(&totSmBufAllocCount, 0); | |
975 | #endif /* CONFIG_CIFS_STATS2 */ | |
976 | ||
1da177e4 LT |
977 | atomic_set(&midCount, 0); |
978 | GlobalCurrentXid = 0; | |
979 | GlobalTotalActiveXid = 0; | |
980 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 981 | memset(Local_System_Name, 0, 15); |
1da177e4 LT |
982 | rwlock_init(&GlobalSMBSeslock); |
983 | spin_lock_init(&GlobalMid_Lock); | |
984 | ||
4523cc30 | 985 | if (cifs_max_pending < 2) { |
1da177e4 | 986 | cifs_max_pending = 2; |
6dc0f87e | 987 | cFYI(1, ("cifs_max_pending set to min of 2")); |
4523cc30 | 988 | } else if (cifs_max_pending > 256) { |
1da177e4 | 989 | cifs_max_pending = 256; |
6dc0f87e | 990 | cFYI(1, ("cifs_max_pending set to max of 256")); |
1da177e4 LT |
991 | } |
992 | ||
993 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
994 | if (rc) |
995 | goto out_clean_proc; | |
996 | ||
997 | rc = cifs_init_mids(); | |
998 | if (rc) | |
999 | goto out_destroy_inodecache; | |
1000 | ||
1001 | rc = cifs_init_request_bufs(); | |
1002 | if (rc) | |
1003 | goto out_destroy_mids; | |
1004 | ||
1005 | rc = register_filesystem(&cifs_fs_type); | |
1006 | if (rc) | |
1007 | goto out_destroy_request_bufs; | |
1008 | ||
1009 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); | |
1010 | if (IS_ERR(oplockThread)) { | |
1011 | rc = PTR_ERR(oplockThread); | |
6dc0f87e | 1012 | cERROR(1, ("error %d create oplock thread", rc)); |
45af7a0f | 1013 | goto out_unregister_filesystem; |
1da177e4 | 1014 | } |
45af7a0f SF |
1015 | |
1016 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1017 | if (IS_ERR(dnotifyThread)) { | |
1018 | rc = PTR_ERR(dnotifyThread); | |
6dc0f87e | 1019 | cERROR(1, ("error %d create dnotify thread", rc)); |
45af7a0f SF |
1020 | goto out_stop_oplock_thread; |
1021 | } | |
1022 | ||
1023 | return 0; | |
1024 | ||
1025 | out_stop_oplock_thread: | |
1026 | kthread_stop(oplockThread); | |
1027 | out_unregister_filesystem: | |
1028 | unregister_filesystem(&cifs_fs_type); | |
1029 | out_destroy_request_bufs: | |
1030 | cifs_destroy_request_bufs(); | |
1031 | out_destroy_mids: | |
1032 | cifs_destroy_mids(); | |
1033 | out_destroy_inodecache: | |
1034 | cifs_destroy_inodecache(); | |
1035 | out_clean_proc: | |
1da177e4 LT |
1036 | #ifdef CONFIG_PROC_FS |
1037 | cifs_proc_clean(); | |
1038 | #endif | |
1039 | return rc; | |
1040 | } | |
1041 | ||
1042 | static void __exit | |
1043 | exit_cifs(void) | |
1044 | { | |
63135e08 | 1045 | cFYI(0, ("exit_cifs")); |
1da177e4 LT |
1046 | #ifdef CONFIG_PROC_FS |
1047 | cifs_proc_clean(); | |
1048 | #endif | |
1049 | unregister_filesystem(&cifs_fs_type); | |
1050 | cifs_destroy_inodecache(); | |
1051 | cifs_destroy_mids(); | |
1052 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1053 | kthread_stop(oplockThread); |
1054 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1058 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1059 | MODULE_DESCRIPTION |
63135e08 SF |
1060 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1061 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1062 | MODULE_VERSION(CIFS_VERSION); |
1063 | module_init(init_cifs) | |
1064 | module_exit(exit_cifs) |