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> | |
84a15b93 | 46 | #include <linux/key-type.h> |
6103335d | 47 | #include "dns_resolve.h" |
e545937a | 48 | #include "cifs_spnego.h" |
1da177e4 LT |
49 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
50 | ||
51 | #ifdef CONFIG_CIFS_QUOTA | |
52 | static struct quotactl_ops cifs_quotactl_ops; | |
35c11fdd SF |
53 | #endif /* QUOTA */ |
54 | ||
1da177e4 LT |
55 | int cifsFYI = 0; |
56 | int cifsERROR = 1; | |
57 | int traceSMB = 0; | |
58 | unsigned int oplockEnabled = 1; | |
59 | unsigned int experimEnabled = 0; | |
60 | unsigned int linuxExtEnabled = 1; | |
61 | unsigned int lookupCacheEnabled = 1; | |
62 | unsigned int multiuser_mount = 0; | |
3979877e SF |
63 | unsigned int extended_security = CIFSSEC_DEF; |
64 | /* unsigned int ntlmv2_support = 0; */ | |
1da177e4 | 65 | unsigned int sign_CIFS_PDUs = 1; |
6dc0f87e SF |
66 | extern struct task_struct *oplockThread; /* remove sparse warning */ |
67 | struct task_struct *oplockThread = NULL; | |
99ee4dbd | 68 | /* extern struct task_struct * dnotifyThread; remove sparse warning */ |
6dc0f87e | 69 | static struct task_struct *dnotifyThread = NULL; |
ee9b6d61 | 70 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
71 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
72 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
73 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
74 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
75 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
76 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
77 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
78 | "1 to 64"); | |
1da177e4 LT |
79 | unsigned int cifs_min_small = 30; |
80 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
81 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
82 | "Range: 2 to 256"); | |
1da177e4 LT |
83 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
84 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
85 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
86 | "Default: 50 Range: 2 to 256"); | |
1da177e4 | 87 | |
1da177e4 LT |
88 | extern mempool_t *cifs_sm_req_poolp; |
89 | extern mempool_t *cifs_req_poolp; | |
90 | extern mempool_t *cifs_mid_poolp; | |
91 | ||
e18b890b | 92 | extern struct kmem_cache *cifs_oplock_cachep; |
1da177e4 LT |
93 | |
94 | static int | |
95 | cifs_read_super(struct super_block *sb, void *data, | |
96 | const char *devname, int silent) | |
97 | { | |
98 | struct inode *inode; | |
99 | struct cifs_sb_info *cifs_sb; | |
100 | int rc = 0; | |
50c2f753 | 101 | |
1b2b2126 SF |
102 | /* BB should we make this contingent on mount parm? */ |
103 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 104 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 105 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 106 | if (cifs_sb == NULL) |
1da177e4 | 107 | return -ENOMEM; |
1da177e4 LT |
108 | |
109 | rc = cifs_mount(sb, cifs_sb, data, devname); | |
110 | ||
111 | if (rc) { | |
112 | if (!silent) | |
113 | cERROR(1, | |
114 | ("cifs_mount failed w/return code = %d", rc)); | |
115 | goto out_mount_failed; | |
116 | } | |
117 | ||
118 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
119 | sb->s_op = &cifs_super_ops; | |
4523cc30 | 120 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
790fe579 SF |
121 | sb->s_blocksize = |
122 | cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
1da177e4 LT |
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 | } | |
50c2f753 | 141 | |
7521a3c5 SF |
142 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
143 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
144 | cFYI(1, ("export ops supported")); | |
145 | sb->s_export_op = &cifs_export_ops; | |
146 | } | |
147 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
148 | |
149 | return 0; | |
150 | ||
151 | out_no_root: | |
152 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
153 | if (inode) | |
154 | iput(inode); | |
155 | ||
156 | out_mount_failed: | |
4523cc30 SF |
157 | if (cifs_sb) { |
158 | if (cifs_sb->local_nls) | |
50c2f753 | 159 | unload_nls(cifs_sb->local_nls); |
1da177e4 LT |
160 | kfree(cifs_sb); |
161 | } | |
162 | return rc; | |
163 | } | |
164 | ||
165 | static void | |
166 | cifs_put_super(struct super_block *sb) | |
167 | { | |
168 | int rc = 0; | |
169 | struct cifs_sb_info *cifs_sb; | |
170 | ||
171 | cFYI(1, ("In cifs_put_super")); | |
172 | cifs_sb = CIFS_SB(sb); | |
4523cc30 | 173 | if (cifs_sb == NULL) { |
790fe579 | 174 | cFYI(1, ("Empty cifs superblock info passed to unmount")); |
1da177e4 LT |
175 | return; |
176 | } | |
790fe579 | 177 | rc = cifs_umount(sb, cifs_sb); |
1da177e4 LT |
178 | if (rc) { |
179 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
180 | } | |
181 | unload_nls(cifs_sb->local_nls); | |
182 | kfree(cifs_sb); | |
183 | return; | |
184 | } | |
185 | ||
186 | static int | |
726c3342 | 187 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 188 | { |
726c3342 | 189 | struct super_block *sb = dentry->d_sb; |
790fe579 | 190 | int xid; |
c81156dd | 191 | int rc = -EOPNOTSUPP; |
1da177e4 LT |
192 | struct cifs_sb_info *cifs_sb; |
193 | struct cifsTconInfo *pTcon; | |
194 | ||
195 | xid = GetXid(); | |
196 | ||
197 | cifs_sb = CIFS_SB(sb); | |
198 | pTcon = cifs_sb->tcon; | |
199 | ||
200 | buf->f_type = CIFS_MAGIC_NUMBER; | |
201 | ||
202 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ | |
790fe579 | 203 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
c81156dd SF |
204 | presumably be total path, but note |
205 | that some servers (includinng Samba 3) | |
206 | have a shorter maximum path */ | |
1da177e4 LT |
207 | buf->f_files = 0; /* undefined */ |
208 | buf->f_ffree = 0; /* unlimited */ | |
209 | ||
1da177e4 | 210 | /* BB we could add a second check for a QFS Unix capability bit */ |
f28ac91b | 211 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
212 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
213 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 214 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
215 | |
216 | /* Only need to call the old QFSInfo if failed | |
217 | on newer one */ | |
4523cc30 SF |
218 | if (rc) |
219 | if (pTcon->ses->capabilities & CAP_NT_SMBS) | |
9ac00b7d | 220 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); /* not supported by OS2 */ |
1da177e4 | 221 | |
9ac00b7d SF |
222 | /* Some old Windows servers also do not support level 103, retry with |
223 | older level one if old server failed the previous call or we | |
224 | bypassed it because we detected that this was an older LANMAN sess */ | |
4523cc30 | 225 | if (rc) |
20962438 | 226 | rc = SMBOldQFSInfo(xid, pTcon, buf); |
790fe579 | 227 | /* int f_type; |
1da177e4 LT |
228 | __fsid_t f_fsid; |
229 | int f_namelen; */ | |
c81156dd | 230 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 231 | FreeXid(xid); |
c81156dd SF |
232 | return 0; /* always return success? what if volume is no |
233 | longer available? */ | |
1da177e4 LT |
234 | } |
235 | ||
50c2f753 | 236 | static int cifs_permission(struct inode *inode, int mask, struct nameidata *nd) |
1da177e4 LT |
237 | { |
238 | struct cifs_sb_info *cifs_sb; | |
239 | ||
240 | cifs_sb = CIFS_SB(inode->i_sb); | |
241 | ||
26f57364 | 242 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1da177e4 | 243 | return 0; |
26f57364 | 244 | else /* file mode might have been restricted at mount time |
50c2f753 | 245 | on the client (above and beyond ACL on servers) for |
1da177e4 | 246 | servers which do not support setting and viewing mode bits, |
50c2f753 | 247 | so allowing client to check permissions is useful */ |
1da177e4 LT |
248 | return generic_permission(inode, mask, NULL); |
249 | } | |
250 | ||
e18b890b CL |
251 | static struct kmem_cache *cifs_inode_cachep; |
252 | static struct kmem_cache *cifs_req_cachep; | |
253 | static struct kmem_cache *cifs_mid_cachep; | |
254 | struct kmem_cache *cifs_oplock_cachep; | |
255 | static struct kmem_cache *cifs_sm_req_cachep; | |
1da177e4 LT |
256 | mempool_t *cifs_sm_req_poolp; |
257 | mempool_t *cifs_req_poolp; | |
258 | mempool_t *cifs_mid_poolp; | |
259 | ||
260 | static struct inode * | |
261 | cifs_alloc_inode(struct super_block *sb) | |
262 | { | |
263 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 264 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
265 | if (!cifs_inode) |
266 | return NULL; | |
267 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
268 | atomic_set(&cifs_inode->inUse, 0); | |
269 | cifs_inode->time = 0; | |
cea21805 | 270 | cifs_inode->write_behind_rc = 0; |
1da177e4 LT |
271 | /* Until the file is open and we have gotten oplock |
272 | info back from the server, can not assume caching of | |
273 | file data or metadata */ | |
274 | cifs_inode->clientCanCacheRead = FALSE; | |
275 | cifs_inode->clientCanCacheAll = FALSE; | |
1da177e4 | 276 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
50c2f753 | 277 | |
1b2b2126 SF |
278 | /* Can not set i_flags here - they get immediately overwritten |
279 | to zero by the VFS */ | |
280 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
281 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
282 | return &cifs_inode->vfs_inode; | |
283 | } | |
284 | ||
285 | static void | |
286 | cifs_destroy_inode(struct inode *inode) | |
287 | { | |
288 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
289 | } | |
290 | ||
291 | /* | |
292 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
293 | * Not all settable options are displayed but most of the important | |
294 | * ones are. | |
295 | */ | |
296 | static int | |
297 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
298 | { | |
299 | struct cifs_sb_info *cifs_sb; | |
300 | ||
301 | cifs_sb = CIFS_SB(m->mnt_sb); | |
302 | ||
303 | if (cifs_sb) { | |
304 | if (cifs_sb->tcon) { | |
004c46b9 | 305 | /* BB add prepath to mount options displayed */ |
1da177e4 LT |
306 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); |
307 | if (cifs_sb->tcon->ses) { | |
308 | if (cifs_sb->tcon->ses->userName) | |
309 | seq_printf(s, ",username=%s", | |
310 | cifs_sb->tcon->ses->userName); | |
4523cc30 | 311 | if (cifs_sb->tcon->ses->domainName) |
1da177e4 LT |
312 | seq_printf(s, ",domain=%s", |
313 | cifs_sb->tcon->ses->domainName); | |
314 | } | |
d5d18501 SF |
315 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) || |
316 | !(cifs_sb->tcon->unix_ext)) | |
317 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); | |
318 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) || | |
319 | !(cifs_sb->tcon->unix_ext)) | |
320 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); | |
1da177e4 | 321 | } |
4523cc30 SF |
322 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
323 | seq_printf(s, ",posixpaths"); | |
50c2f753 SF |
324 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); |
325 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
1da177e4 LT |
326 | } |
327 | return 0; | |
328 | } | |
329 | ||
330 | #ifdef CONFIG_CIFS_QUOTA | |
50c2f753 SF |
331 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, |
332 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
333 | { |
334 | int xid; | |
335 | int rc = 0; | |
336 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
337 | struct cifsTconInfo *pTcon; | |
50c2f753 | 338 | |
4523cc30 | 339 | if (cifs_sb) |
1da177e4 LT |
340 | pTcon = cifs_sb->tcon; |
341 | else | |
342 | return -EIO; | |
343 | ||
344 | ||
345 | xid = GetXid(); | |
4523cc30 | 346 | if (pTcon) { |
50c2f753 | 347 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 | 348 | } else { |
95ba7362 | 349 | rc = -EIO; |
1da177e4 LT |
350 | } |
351 | ||
352 | FreeXid(xid); | |
353 | return rc; | |
354 | } | |
355 | ||
50c2f753 SF |
356 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, |
357 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
358 | { |
359 | int xid; | |
360 | int rc = 0; | |
361 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
362 | struct cifsTconInfo *pTcon; | |
363 | ||
4523cc30 | 364 | if (cifs_sb) |
1da177e4 LT |
365 | pTcon = cifs_sb->tcon; |
366 | else | |
367 | return -EIO; | |
368 | ||
369 | xid = GetXid(); | |
4523cc30 | 370 | if (pTcon) { |
50c2f753 | 371 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 LT |
372 | } else { |
373 | rc = -EIO; | |
374 | } | |
375 | ||
376 | FreeXid(xid); | |
377 | return rc; | |
378 | } | |
379 | ||
50c2f753 | 380 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) |
1da177e4 | 381 | { |
50c2f753 | 382 | int xid; |
1da177e4 LT |
383 | int rc = 0; |
384 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
385 | struct cifsTconInfo *pTcon; | |
386 | ||
4523cc30 | 387 | if (cifs_sb) |
1da177e4 LT |
388 | pTcon = cifs_sb->tcon; |
389 | else | |
390 | return -EIO; | |
391 | ||
392 | xid = GetXid(); | |
4523cc30 | 393 | if (pTcon) { |
50c2f753 | 394 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); |
1da177e4 LT |
395 | } else { |
396 | rc = -EIO; | |
397 | } | |
398 | ||
399 | FreeXid(xid); | |
400 | return rc; | |
401 | } | |
402 | ||
50c2f753 | 403 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) |
1da177e4 LT |
404 | { |
405 | int xid; | |
406 | int rc = 0; | |
407 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
408 | struct cifsTconInfo *pTcon; | |
409 | ||
4523cc30 | 410 | if (cifs_sb) { |
1da177e4 LT |
411 | pTcon = cifs_sb->tcon; |
412 | } else { | |
413 | return -EIO; | |
414 | } | |
415 | xid = GetXid(); | |
4523cc30 | 416 | if (pTcon) { |
50c2f753 | 417 | cFYI(1, ("pqstats %p", qstats)); |
1da177e4 LT |
418 | } else { |
419 | rc = -EIO; | |
420 | } | |
421 | ||
422 | FreeXid(xid); | |
423 | return rc; | |
424 | } | |
425 | ||
426 | static struct quotactl_ops cifs_quotactl_ops = { | |
427 | .set_xquota = cifs_xquota_set, | |
428 | .get_xquota = cifs_xquota_set, | |
429 | .set_xstate = cifs_xstate_set, | |
430 | .get_xstate = cifs_xstate_get, | |
431 | }; | |
432 | #endif | |
433 | ||
50c2f753 | 434 | static void cifs_umount_begin(struct vfsmount *vfsmnt, int flags) |
68058e75 | 435 | { |
5e1253b5 | 436 | struct cifs_sb_info *cifs_sb; |
50c2f753 | 437 | struct cifsTconInfo *tcon; |
68058e75 | 438 | |
8b512d9a TM |
439 | if (!(flags & MNT_FORCE)) |
440 | return; | |
441 | cifs_sb = CIFS_SB(vfsmnt->mnt_sb); | |
4523cc30 | 442 | if (cifs_sb == NULL) |
9e2e85f8 SF |
443 | return; |
444 | ||
445 | tcon = cifs_sb->tcon; | |
4523cc30 | 446 | if (tcon == NULL) |
9e2e85f8 | 447 | return; |
5e1253b5 SF |
448 | down(&tcon->tconSem); |
449 | if (atomic_read(&tcon->useCount) == 1) | |
450 | tcon->tidStatus = CifsExiting; | |
451 | up(&tcon->tconSem); | |
452 | ||
3a5ff61c | 453 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 454 | /* cancel_notify_requests(tcon); */ |
50c2f753 SF |
455 | if (tcon->ses && tcon->ses->server) { |
456 | cFYI(1, ("wake up tasks now - umount begin not complete")); | |
9e2e85f8 | 457 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
458 | wake_up_all(&tcon->ses->server->response_q); |
459 | msleep(1); /* yield */ | |
460 | /* we have to kick the requests once more */ | |
461 | wake_up_all(&tcon->ses->server->response_q); | |
462 | msleep(1); | |
5e1253b5 SF |
463 | } |
464 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
465 | |
466 | return; | |
467 | } | |
68058e75 | 468 | |
bf97d287 SF |
469 | #ifdef CONFIG_CIFS_STATS2 |
470 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
471 | { | |
472 | /* BB FIXME */ | |
473 | return 0; | |
474 | } | |
475 | #endif | |
476 | ||
1da177e4 LT |
477 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
478 | { | |
479 | *flags |= MS_NODIRATIME; | |
480 | return 0; | |
481 | } | |
482 | ||
ee9b6d61 | 483 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
484 | .read_inode = cifs_read_inode, |
485 | .put_super = cifs_put_super, | |
486 | .statfs = cifs_statfs, | |
487 | .alloc_inode = cifs_alloc_inode, | |
488 | .destroy_inode = cifs_destroy_inode, | |
50c2f753 SF |
489 | /* .drop_inode = generic_delete_inode, |
490 | .delete_inode = cifs_delete_inode, */ /* Do not need above two | |
491 | functions unless later we add lazy close of inodes or unless the | |
492 | kernel forgets to call us with the same number of releases (closes) | |
493 | as opens */ | |
1da177e4 | 494 | .show_options = cifs_show_options, |
7b7abfe3 | 495 | .umount_begin = cifs_umount_begin, |
1da177e4 | 496 | .remount_fs = cifs_remount, |
bf97d287 | 497 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 498 | .show_stats = cifs_show_stats, |
bf97d287 | 499 | #endif |
1da177e4 LT |
500 | }; |
501 | ||
454e2398 | 502 | static int |
1da177e4 | 503 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 504 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
505 | { |
506 | int rc; | |
507 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
508 | ||
509 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
510 | ||
511 | if (IS_ERR(sb)) | |
454e2398 | 512 | return PTR_ERR(sb); |
1da177e4 LT |
513 | |
514 | sb->s_flags = flags; | |
515 | ||
9b04c997 | 516 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
517 | if (rc) { |
518 | up_write(&sb->s_umount); | |
519 | deactivate_super(sb); | |
454e2398 | 520 | return rc; |
1da177e4 LT |
521 | } |
522 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 523 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
524 | } |
525 | ||
027445c3 BP |
526 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
527 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 528 | { |
e6a00296 | 529 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
530 | ssize_t written; |
531 | ||
027445c3 | 532 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
533 | if (!CIFS_I(inode)->clientCanCacheAll) |
534 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
535 | return written; |
536 | } | |
537 | ||
c32a0b68 SF |
538 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
539 | { | |
540 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 541 | if (origin == SEEK_END) { |
030e9d81 SF |
542 | int retval; |
543 | ||
544 | /* some applications poll for the file length in this strange | |
545 | way so we must seek to end on non-oplocked files by | |
546 | setting the revalidate time to zero */ | |
c33f8d32 | 547 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 SF |
548 | |
549 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
550 | if (retval < 0) |
551 | return (loff_t)retval; | |
552 | } | |
553 | return remote_llseek(file, offset, origin); | |
554 | } | |
555 | ||
1da177e4 LT |
556 | static struct file_system_type cifs_fs_type = { |
557 | .owner = THIS_MODULE, | |
558 | .name = "cifs", | |
559 | .get_sb = cifs_get_sb, | |
560 | .kill_sb = kill_anon_super, | |
561 | /* .fs_flags */ | |
562 | }; | |
754661f1 | 563 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
564 | .create = cifs_create, |
565 | .lookup = cifs_lookup, | |
566 | .getattr = cifs_getattr, | |
567 | .unlink = cifs_unlink, | |
568 | .link = cifs_hardlink, | |
569 | .mkdir = cifs_mkdir, | |
570 | .rmdir = cifs_rmdir, | |
571 | .rename = cifs_rename, | |
572 | .permission = cifs_permission, | |
573 | /* revalidate:cifs_revalidate, */ | |
574 | .setattr = cifs_setattr, | |
575 | .symlink = cifs_symlink, | |
576 | .mknod = cifs_mknod, | |
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_file_inode_ops = { |
1da177e4 LT |
586 | /* revalidate:cifs_revalidate, */ |
587 | .setattr = cifs_setattr, | |
588 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
589 | .rename = cifs_rename, | |
590 | .permission = cifs_permission, | |
591 | #ifdef CONFIG_CIFS_XATTR | |
592 | .setxattr = cifs_setxattr, | |
593 | .getxattr = cifs_getxattr, | |
594 | .listxattr = cifs_listxattr, | |
595 | .removexattr = cifs_removexattr, | |
50c2f753 | 596 | #endif |
1da177e4 LT |
597 | }; |
598 | ||
754661f1 | 599 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 600 | .readlink = generic_readlink, |
1da177e4 LT |
601 | .follow_link = cifs_follow_link, |
602 | .put_link = cifs_put_link, | |
603 | .permission = cifs_permission, | |
604 | /* BB add the following two eventually */ | |
605 | /* revalidate: cifs_revalidate, | |
606 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
607 | #ifdef CONFIG_CIFS_XATTR | |
608 | .setxattr = cifs_setxattr, | |
609 | .getxattr = cifs_getxattr, | |
610 | .listxattr = cifs_listxattr, | |
611 | .removexattr = cifs_removexattr, | |
50c2f753 | 612 | #endif |
1da177e4 LT |
613 | }; |
614 | ||
4b6f5d20 | 615 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
616 | .read = do_sync_read, |
617 | .write = do_sync_write, | |
87c89dd7 SF |
618 | .aio_read = generic_file_aio_read, |
619 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
620 | .open = cifs_open, |
621 | .release = cifs_close, | |
622 | .lock = cifs_lock, | |
623 | .fsync = cifs_fsync, | |
624 | .flush = cifs_flush, | |
625 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 626 | .splice_read = generic_file_splice_read, |
c32a0b68 | 627 | .llseek = cifs_llseek, |
c67593a0 SF |
628 | #ifdef CONFIG_CIFS_POSIX |
629 | .ioctl = cifs_ioctl, | |
630 | #endif /* CONFIG_CIFS_POSIX */ | |
631 | ||
1da177e4 | 632 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
633 | .dir_notify = cifs_dir_notify, |
634 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
635 | }; | |
636 | ||
4b6f5d20 | 637 | const struct file_operations cifs_file_direct_ops = { |
50c2f753 | 638 | /* no mmap, no aio, no readv - |
1da177e4 LT |
639 | BB reevaluate whether they can be done with directio, no cache */ |
640 | .read = cifs_user_read, | |
641 | .write = cifs_user_write, | |
642 | .open = cifs_open, | |
643 | .release = cifs_close, | |
644 | .lock = cifs_lock, | |
645 | .fsync = cifs_fsync, | |
646 | .flush = cifs_flush, | |
5ffc4ef4 | 647 | .splice_read = generic_file_splice_read, |
c67593a0 SF |
648 | #ifdef CONFIG_CIFS_POSIX |
649 | .ioctl = cifs_ioctl, | |
650 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 651 | .llseek = cifs_llseek, |
1da177e4 LT |
652 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
653 | .dir_notify = cifs_dir_notify, | |
654 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
655 | }; | |
4b6f5d20 | 656 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
657 | .read = do_sync_read, |
658 | .write = do_sync_write, | |
87c89dd7 SF |
659 | .aio_read = generic_file_aio_read, |
660 | .aio_write = cifs_file_aio_write, | |
661 | .open = cifs_open, | |
662 | .release = cifs_close, | |
663 | .fsync = cifs_fsync, | |
664 | .flush = cifs_flush, | |
665 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 666 | .splice_read = generic_file_splice_read, |
c32a0b68 | 667 | .llseek = cifs_llseek, |
8b94bcb9 | 668 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 669 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
670 | #endif /* CONFIG_CIFS_POSIX */ |
671 | ||
672 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 673 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
674 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
675 | }; | |
676 | ||
4b6f5d20 | 677 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 678 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
679 | BB reevaluate whether they can be done with directio, no cache */ |
680 | .read = cifs_user_read, | |
681 | .write = cifs_user_write, | |
682 | .open = cifs_open, | |
683 | .release = cifs_close, | |
684 | .fsync = cifs_fsync, | |
685 | .flush = cifs_flush, | |
5ffc4ef4 | 686 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 687 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 688 | .ioctl = cifs_ioctl, |
8b94bcb9 | 689 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 690 | .llseek = cifs_llseek, |
8b94bcb9 | 691 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 692 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
693 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
694 | }; | |
1da177e4 | 695 | |
4b6f5d20 | 696 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
697 | .readdir = cifs_readdir, |
698 | .release = cifs_closedir, | |
699 | .read = generic_read_dir, | |
700 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
701 | .dir_notify = cifs_dir_notify, | |
702 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
50c2f753 | 703 | .ioctl = cifs_ioctl, |
1da177e4 LT |
704 | }; |
705 | ||
706 | static void | |
4ba9b9d0 | 707 | cifs_init_once(struct kmem_cache *cachep, void *inode) |
1da177e4 LT |
708 | { |
709 | struct cifsInodeInfo *cifsi = inode; | |
710 | ||
a35afb83 CL |
711 | inode_init_once(&cifsi->vfs_inode); |
712 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
713 | } |
714 | ||
715 | static int | |
716 | cifs_init_inodecache(void) | |
717 | { | |
718 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 719 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
720 | 0, (SLAB_RECLAIM_ACCOUNT| |
721 | SLAB_MEM_SPREAD), | |
20c2df83 | 722 | cifs_init_once); |
1da177e4 LT |
723 | if (cifs_inode_cachep == NULL) |
724 | return -ENOMEM; | |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
729 | static void | |
730 | cifs_destroy_inodecache(void) | |
731 | { | |
1a1d92c1 | 732 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
733 | } |
734 | ||
735 | static int | |
736 | cifs_init_request_bufs(void) | |
737 | { | |
4523cc30 | 738 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
739 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
740 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
741 | CIFSMaxBufSize = 8192; | |
742 | } else if (CIFSMaxBufSize > 1024*127) { | |
743 | CIFSMaxBufSize = 1024 * 127; | |
744 | } else { | |
745 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
746 | } | |
747 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
748 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
749 | CIFSMaxBufSize + | |
750 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 751 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
752 | if (cifs_req_cachep == NULL) |
753 | return -ENOMEM; | |
754 | ||
4523cc30 | 755 | if (cifs_min_rcv < 1) |
1da177e4 LT |
756 | cifs_min_rcv = 1; |
757 | else if (cifs_min_rcv > 64) { | |
758 | cifs_min_rcv = 64; | |
50c2f753 | 759 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); |
1da177e4 LT |
760 | } |
761 | ||
93d2341c MD |
762 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
763 | cifs_req_cachep); | |
1da177e4 | 764 | |
4523cc30 | 765 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
766 | kmem_cache_destroy(cifs_req_cachep); |
767 | return -ENOMEM; | |
768 | } | |
ec637e3f | 769 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
770 | almost all handle based requests (but not write response, nor is it |
771 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 772 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
773 | for the case in which debug was on, but this larger size allows |
774 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 775 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
776 | alloc of large cifs buffers even when page debugging is on */ |
777 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 778 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 779 | NULL); |
1da177e4 LT |
780 | if (cifs_sm_req_cachep == NULL) { |
781 | mempool_destroy(cifs_req_poolp); | |
782 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 783 | return -ENOMEM; |
1da177e4 LT |
784 | } |
785 | ||
4523cc30 | 786 | if (cifs_min_small < 2) |
1da177e4 LT |
787 | cifs_min_small = 2; |
788 | else if (cifs_min_small > 256) { | |
789 | cifs_min_small = 256; | |
6dc0f87e | 790 | cFYI(1, ("cifs_min_small set to maximum (256)")); |
1da177e4 LT |
791 | } |
792 | ||
93d2341c MD |
793 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
794 | cifs_sm_req_cachep); | |
1da177e4 | 795 | |
4523cc30 | 796 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
797 | mempool_destroy(cifs_req_poolp); |
798 | kmem_cache_destroy(cifs_req_cachep); | |
799 | kmem_cache_destroy(cifs_sm_req_cachep); | |
800 | return -ENOMEM; | |
801 | } | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static void | |
807 | cifs_destroy_request_bufs(void) | |
808 | { | |
809 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 810 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 811 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 812 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
813 | } |
814 | ||
815 | static int | |
816 | cifs_init_mids(void) | |
817 | { | |
818 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
819 | sizeof(struct mid_q_entry), 0, |
820 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
821 | if (cifs_mid_cachep == NULL) |
822 | return -ENOMEM; | |
823 | ||
93d2341c MD |
824 | /* 3 is a reasonable minimum number of simultaneous operations */ |
825 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 826 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
827 | kmem_cache_destroy(cifs_mid_cachep); |
828 | return -ENOMEM; | |
829 | } | |
830 | ||
831 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
26f57364 SF |
832 | sizeof(struct oplock_q_entry), 0, |
833 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 | 834 | if (cifs_oplock_cachep == NULL) { |
1da177e4 | 835 | mempool_destroy(cifs_mid_poolp); |
e6985c7f | 836 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
837 | return -ENOMEM; |
838 | } | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | static void | |
844 | cifs_destroy_mids(void) | |
845 | { | |
846 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
847 | kmem_cache_destroy(cifs_mid_cachep); |
848 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
849 | } |
850 | ||
50c2f753 | 851 | static int cifs_oplock_thread(void *dummyarg) |
1da177e4 | 852 | { |
6dc0f87e | 853 | struct oplock_q_entry *oplock_item; |
1da177e4 | 854 | struct cifsTconInfo *pTcon; |
6dc0f87e | 855 | struct inode *inode; |
1da177e4 | 856 | __u16 netfid; |
cea21805 | 857 | int rc, waitrc = 0; |
1da177e4 | 858 | |
83144186 | 859 | set_freezable(); |
1da177e4 | 860 | do { |
6dc0f87e | 861 | if (try_to_freeze()) |
ede1327e | 862 | continue; |
50c2f753 | 863 | |
1da177e4 | 864 | spin_lock(&GlobalMid_Lock); |
4523cc30 | 865 | if (list_empty(&GlobalOplock_Q)) { |
1da177e4 LT |
866 | spin_unlock(&GlobalMid_Lock); |
867 | set_current_state(TASK_INTERRUPTIBLE); | |
868 | schedule_timeout(39*HZ); | |
869 | } else { | |
6dc0f87e | 870 | oplock_item = list_entry(GlobalOplock_Q.next, |
1da177e4 | 871 | struct oplock_q_entry, qhead); |
4523cc30 | 872 | if (oplock_item) { |
50c2f753 | 873 | cFYI(1, ("found oplock item to write out")); |
1da177e4 LT |
874 | pTcon = oplock_item->tcon; |
875 | inode = oplock_item->pinode; | |
876 | netfid = oplock_item->netfid; | |
877 | spin_unlock(&GlobalMid_Lock); | |
878 | DeleteOplockQEntry(oplock_item); | |
879 | /* can not grab inode sem here since it would | |
6dc0f87e | 880 | deadlock when oplock received on delete |
1b1dcc1b | 881 | since vfs_unlink holds the i_mutex across |
1da177e4 | 882 | the call */ |
1b1dcc1b | 883 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 | 884 | if (S_ISREG(inode->i_mode)) { |
26f57364 SF |
885 | rc = |
886 | filemap_fdatawrite(inode->i_mapping); | |
50c2f753 SF |
887 | if (CIFS_I(inode)->clientCanCacheRead |
888 | == 0) { | |
cea21805 | 889 | waitrc = filemap_fdatawait(inode->i_mapping); |
1da177e4 LT |
890 | invalidate_remote_inode(inode); |
891 | } | |
cea21805 JL |
892 | if (rc == 0) |
893 | rc = waitrc; | |
1da177e4 LT |
894 | } else |
895 | rc = 0; | |
1b1dcc1b | 896 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
897 | if (rc) |
898 | CIFS_I(inode)->write_behind_rc = rc; | |
6dc0f87e SF |
899 | cFYI(1, ("Oplock flush inode %p rc %d", |
900 | inode, rc)); | |
901 | ||
902 | /* releasing stale oplock after recent reconnect | |
903 | of smb session using a now incorrect file | |
904 | handle is not a data integrity issue but do | |
905 | not bother sending an oplock release if session | |
906 | to server still is disconnected since oplock | |
1da177e4 | 907 | already released by the server in that case */ |
4523cc30 | 908 | if (pTcon->tidStatus != CifsNeedReconnect) { |
1da177e4 | 909 | rc = CIFSSMBLock(0, pTcon, netfid, |
6dc0f87e | 910 | 0 /* len */ , 0 /* offset */, 0, |
1da177e4 LT |
911 | 0, LOCKING_ANDX_OPLOCK_RELEASE, |
912 | 0 /* wait flag */); | |
26f57364 | 913 | cFYI(1, ("Oplock release rc = %d", rc)); |
1da177e4 LT |
914 | } |
915 | } else | |
916 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
917 | set_current_state(TASK_INTERRUPTIBLE); |
918 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 919 | } |
45af7a0f SF |
920 | } while (!kthread_should_stop()); |
921 | ||
922 | return 0; | |
1da177e4 LT |
923 | } |
924 | ||
50c2f753 | 925 | static int cifs_dnotify_thread(void *dummyarg) |
8d0d5094 | 926 | { |
6ab16d24 SF |
927 | struct list_head *tmp; |
928 | struct cifsSesInfo *ses; | |
929 | ||
8d0d5094 | 930 | do { |
0fd1ffe0 | 931 | if (try_to_freeze()) |
16abbecd | 932 | continue; |
8d0d5094 | 933 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
934 | schedule_timeout(15*HZ); |
935 | read_lock(&GlobalSMBSeslock); | |
936 | /* check if any stuck requests that need | |
937 | to be woken up and wakeq so the | |
938 | thread can wake up and error out */ | |
939 | list_for_each(tmp, &GlobalSMBSessionList) { | |
6dc0f87e | 940 | ses = list_entry(tmp, struct cifsSesInfo, |
6ab16d24 | 941 | cifsSessionList); |
6dc0f87e | 942 | if (ses && ses->server && |
2a138ebb | 943 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
944 | wake_up_all(&ses->server->response_q); |
945 | } | |
946 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
947 | } while (!kthread_should_stop()); |
948 | ||
949 | return 0; | |
1da177e4 LT |
950 | } |
951 | ||
952 | static int __init | |
953 | init_cifs(void) | |
954 | { | |
955 | int rc = 0; | |
956 | #ifdef CONFIG_PROC_FS | |
957 | cifs_proc_init(); | |
958 | #endif | |
2cd646a2 | 959 | /* INIT_LIST_HEAD(&GlobalServerList);*/ /* BB not implemented yet */ |
1da177e4 LT |
960 | INIT_LIST_HEAD(&GlobalSMBSessionList); |
961 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
962 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
963 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
964 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
965 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 966 | #endif |
1da177e4 LT |
967 | /* |
968 | * Initialize Global counters | |
969 | */ | |
970 | atomic_set(&sesInfoAllocCount, 0); | |
971 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 972 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
973 | atomic_set(&tcpSesReconnectCount, 0); |
974 | atomic_set(&tconInfoReconnectCount, 0); | |
975 | ||
976 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
977 | atomic_set(&smBufAllocCount, 0); |
978 | #ifdef CONFIG_CIFS_STATS2 | |
979 | atomic_set(&totBufAllocCount, 0); | |
980 | atomic_set(&totSmBufAllocCount, 0); | |
981 | #endif /* CONFIG_CIFS_STATS2 */ | |
982 | ||
1da177e4 LT |
983 | atomic_set(&midCount, 0); |
984 | GlobalCurrentXid = 0; | |
985 | GlobalTotalActiveXid = 0; | |
986 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 987 | memset(Local_System_Name, 0, 15); |
1da177e4 LT |
988 | rwlock_init(&GlobalSMBSeslock); |
989 | spin_lock_init(&GlobalMid_Lock); | |
990 | ||
4523cc30 | 991 | if (cifs_max_pending < 2) { |
1da177e4 | 992 | cifs_max_pending = 2; |
6dc0f87e | 993 | cFYI(1, ("cifs_max_pending set to min of 2")); |
4523cc30 | 994 | } else if (cifs_max_pending > 256) { |
1da177e4 | 995 | cifs_max_pending = 256; |
6dc0f87e | 996 | cFYI(1, ("cifs_max_pending set to max of 256")); |
1da177e4 LT |
997 | } |
998 | ||
999 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
1000 | if (rc) |
1001 | goto out_clean_proc; | |
1002 | ||
1003 | rc = cifs_init_mids(); | |
1004 | if (rc) | |
1005 | goto out_destroy_inodecache; | |
1006 | ||
1007 | rc = cifs_init_request_bufs(); | |
1008 | if (rc) | |
1009 | goto out_destroy_mids; | |
1010 | ||
1011 | rc = register_filesystem(&cifs_fs_type); | |
1012 | if (rc) | |
1013 | goto out_destroy_request_bufs; | |
84a15b93 JL |
1014 | #ifdef CONFIG_CIFS_UPCALL |
1015 | rc = register_key_type(&cifs_spnego_key_type); | |
1016 | if (rc) | |
1017 | goto out_unregister_filesystem; | |
6103335d SF |
1018 | #endif |
1019 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1020 | rc = register_key_type(&key_type_dns_resolver); | |
1021 | if (rc) | |
1022 | goto out_unregister_key_type; | |
84a15b93 | 1023 | #endif |
45af7a0f SF |
1024 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); |
1025 | if (IS_ERR(oplockThread)) { | |
1026 | rc = PTR_ERR(oplockThread); | |
6dc0f87e | 1027 | cERROR(1, ("error %d create oplock thread", rc)); |
6103335d | 1028 | goto out_unregister_dfs_key_type; |
1da177e4 | 1029 | } |
45af7a0f SF |
1030 | |
1031 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1032 | if (IS_ERR(dnotifyThread)) { | |
1033 | rc = PTR_ERR(dnotifyThread); | |
6dc0f87e | 1034 | cERROR(1, ("error %d create dnotify thread", rc)); |
45af7a0f SF |
1035 | goto out_stop_oplock_thread; |
1036 | } | |
1037 | ||
1038 | return 0; | |
1039 | ||
1040 | out_stop_oplock_thread: | |
1041 | kthread_stop(oplockThread); | |
6103335d SF |
1042 | out_unregister_dfs_key_type: |
1043 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1044 | unregister_key_type(&key_type_dns_resolver); | |
84a15b93 | 1045 | out_unregister_key_type: |
6103335d | 1046 | #endif |
84a15b93 JL |
1047 | #ifdef CONFIG_CIFS_UPCALL |
1048 | unregister_key_type(&cifs_spnego_key_type); | |
45af7a0f | 1049 | out_unregister_filesystem: |
84a15b93 | 1050 | #endif |
45af7a0f SF |
1051 | unregister_filesystem(&cifs_fs_type); |
1052 | out_destroy_request_bufs: | |
1053 | cifs_destroy_request_bufs(); | |
1054 | out_destroy_mids: | |
1055 | cifs_destroy_mids(); | |
1056 | out_destroy_inodecache: | |
1057 | cifs_destroy_inodecache(); | |
1058 | out_clean_proc: | |
1da177e4 LT |
1059 | #ifdef CONFIG_PROC_FS |
1060 | cifs_proc_clean(); | |
1061 | #endif | |
1062 | return rc; | |
1063 | } | |
1064 | ||
1065 | static void __exit | |
1066 | exit_cifs(void) | |
1067 | { | |
63135e08 | 1068 | cFYI(0, ("exit_cifs")); |
1da177e4 LT |
1069 | #ifdef CONFIG_PROC_FS |
1070 | cifs_proc_clean(); | |
84a15b93 | 1071 | #endif |
6103335d SF |
1072 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1073 | unregister_key_type(&key_type_dns_resolver); | |
1074 | #endif | |
84a15b93 JL |
1075 | #ifdef CONFIG_CIFS_UPCALL |
1076 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1077 | #endif |
1078 | unregister_filesystem(&cifs_fs_type); | |
1079 | cifs_destroy_inodecache(); | |
1080 | cifs_destroy_mids(); | |
1081 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1082 | kthread_stop(oplockThread); |
1083 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1084 | } |
1085 | ||
1086 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1087 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1088 | MODULE_DESCRIPTION |
63135e08 SF |
1089 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1090 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1091 | MODULE_VERSION(CIFS_VERSION); |
1092 | module_init(init_cifs) | |
1093 | module_exit(exit_cifs) |