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; | |
e6ab1582 IM |
100 | #ifdef CONFIG_CIFS_DFS_UPCALL |
101 | int len; | |
102 | #endif | |
1da177e4 | 103 | int rc = 0; |
50c2f753 | 104 | |
1b2b2126 SF |
105 | /* BB should we make this contingent on mount parm? */ |
106 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 107 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 108 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 109 | if (cifs_sb == NULL) |
1da177e4 | 110 | return -ENOMEM; |
1da177e4 | 111 | |
e6ab1582 IM |
112 | #ifdef CONFIG_CIFS_DFS_UPCALL |
113 | /* copy mount params to sb for use in submounts */ | |
114 | /* BB: should we move this after the mount so we | |
115 | * do not have to do the copy on failed mounts? | |
116 | * BB: May be it is better to do simple copy before | |
117 | * complex operation (mount), and in case of fail | |
118 | * just exit instead of doing mount and attempting | |
119 | * undo it if this copy fails?*/ | |
120 | len = strlen(data); | |
121 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
122 | if (cifs_sb->mountdata == NULL) { | |
123 | kfree(sb->s_fs_info); | |
124 | sb->s_fs_info = NULL; | |
125 | return -ENOMEM; | |
126 | } | |
127 | strncpy(cifs_sb->mountdata, data, len + 1); | |
128 | cifs_sb->mountdata[len] = '\0'; | |
129 | #endif | |
130 | ||
1da177e4 LT |
131 | rc = cifs_mount(sb, cifs_sb, data, devname); |
132 | ||
133 | if (rc) { | |
134 | if (!silent) | |
135 | cERROR(1, | |
136 | ("cifs_mount failed w/return code = %d", rc)); | |
137 | goto out_mount_failed; | |
138 | } | |
139 | ||
140 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
141 | sb->s_op = &cifs_super_ops; | |
4523cc30 | 142 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
790fe579 SF |
143 | sb->s_blocksize = |
144 | cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
1da177e4 LT |
145 | #ifdef CONFIG_CIFS_QUOTA |
146 | sb->s_qcop = &cifs_quotactl_ops; | |
147 | #endif | |
148 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
149 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
150 | inode = iget(sb, ROOT_I); | |
151 | ||
152 | if (!inode) { | |
153 | rc = -ENOMEM; | |
154 | goto out_no_root; | |
155 | } | |
156 | ||
157 | sb->s_root = d_alloc_root(inode); | |
158 | ||
159 | if (!sb->s_root) { | |
160 | rc = -ENOMEM; | |
161 | goto out_no_root; | |
162 | } | |
50c2f753 | 163 | |
7521a3c5 SF |
164 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
165 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
166 | cFYI(1, ("export ops supported")); | |
167 | sb->s_export_op = &cifs_export_ops; | |
168 | } | |
169 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
170 | |
171 | return 0; | |
172 | ||
173 | out_no_root: | |
174 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
175 | if (inode) | |
176 | iput(inode); | |
177 | ||
178 | out_mount_failed: | |
4523cc30 | 179 | if (cifs_sb) { |
e6ab1582 IM |
180 | #ifdef CONFIG_CIFS_DFS_UPCALL |
181 | if (cifs_sb->mountdata) { | |
182 | kfree(cifs_sb->mountdata); | |
183 | cifs_sb->mountdata = NULL; | |
184 | } | |
185 | #endif | |
4523cc30 | 186 | if (cifs_sb->local_nls) |
50c2f753 | 187 | unload_nls(cifs_sb->local_nls); |
1da177e4 LT |
188 | kfree(cifs_sb); |
189 | } | |
190 | return rc; | |
191 | } | |
192 | ||
193 | static void | |
194 | cifs_put_super(struct super_block *sb) | |
195 | { | |
196 | int rc = 0; | |
197 | struct cifs_sb_info *cifs_sb; | |
198 | ||
199 | cFYI(1, ("In cifs_put_super")); | |
200 | cifs_sb = CIFS_SB(sb); | |
4523cc30 | 201 | if (cifs_sb == NULL) { |
790fe579 | 202 | cFYI(1, ("Empty cifs superblock info passed to unmount")); |
1da177e4 LT |
203 | return; |
204 | } | |
790fe579 | 205 | rc = cifs_umount(sb, cifs_sb); |
1da177e4 LT |
206 | if (rc) { |
207 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
208 | } | |
e6ab1582 IM |
209 | #ifdef CONFIG_CIFS_DFS_UPCALL |
210 | if (cifs_sb->mountdata) { | |
211 | kfree(cifs_sb->mountdata); | |
212 | cifs_sb->mountdata = NULL; | |
213 | } | |
214 | #endif | |
215 | ||
1da177e4 LT |
216 | unload_nls(cifs_sb->local_nls); |
217 | kfree(cifs_sb); | |
218 | return; | |
219 | } | |
220 | ||
221 | static int | |
726c3342 | 222 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 223 | { |
726c3342 | 224 | struct super_block *sb = dentry->d_sb; |
790fe579 | 225 | int xid; |
c81156dd | 226 | int rc = -EOPNOTSUPP; |
1da177e4 LT |
227 | struct cifs_sb_info *cifs_sb; |
228 | struct cifsTconInfo *pTcon; | |
229 | ||
230 | xid = GetXid(); | |
231 | ||
232 | cifs_sb = CIFS_SB(sb); | |
233 | pTcon = cifs_sb->tcon; | |
234 | ||
235 | buf->f_type = CIFS_MAGIC_NUMBER; | |
236 | ||
237 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ | |
790fe579 | 238 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
c81156dd SF |
239 | presumably be total path, but note |
240 | that some servers (includinng Samba 3) | |
241 | have a shorter maximum path */ | |
1da177e4 LT |
242 | buf->f_files = 0; /* undefined */ |
243 | buf->f_ffree = 0; /* unlimited */ | |
244 | ||
1da177e4 | 245 | /* BB we could add a second check for a QFS Unix capability bit */ |
f28ac91b | 246 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
247 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
248 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 249 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
250 | |
251 | /* Only need to call the old QFSInfo if failed | |
252 | on newer one */ | |
4523cc30 SF |
253 | if (rc) |
254 | if (pTcon->ses->capabilities & CAP_NT_SMBS) | |
9ac00b7d | 255 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); /* not supported by OS2 */ |
1da177e4 | 256 | |
9ac00b7d SF |
257 | /* Some old Windows servers also do not support level 103, retry with |
258 | older level one if old server failed the previous call or we | |
259 | bypassed it because we detected that this was an older LANMAN sess */ | |
4523cc30 | 260 | if (rc) |
20962438 | 261 | rc = SMBOldQFSInfo(xid, pTcon, buf); |
790fe579 | 262 | /* int f_type; |
1da177e4 LT |
263 | __fsid_t f_fsid; |
264 | int f_namelen; */ | |
c81156dd | 265 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 266 | FreeXid(xid); |
c81156dd SF |
267 | return 0; /* always return success? what if volume is no |
268 | longer available? */ | |
1da177e4 LT |
269 | } |
270 | ||
50c2f753 | 271 | static int cifs_permission(struct inode *inode, int mask, struct nameidata *nd) |
1da177e4 LT |
272 | { |
273 | struct cifs_sb_info *cifs_sb; | |
274 | ||
275 | cifs_sb = CIFS_SB(inode->i_sb); | |
276 | ||
26f57364 | 277 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1da177e4 | 278 | return 0; |
26f57364 | 279 | else /* file mode might have been restricted at mount time |
50c2f753 | 280 | on the client (above and beyond ACL on servers) for |
1da177e4 | 281 | servers which do not support setting and viewing mode bits, |
50c2f753 | 282 | so allowing client to check permissions is useful */ |
1da177e4 LT |
283 | return generic_permission(inode, mask, NULL); |
284 | } | |
285 | ||
e18b890b CL |
286 | static struct kmem_cache *cifs_inode_cachep; |
287 | static struct kmem_cache *cifs_req_cachep; | |
288 | static struct kmem_cache *cifs_mid_cachep; | |
289 | struct kmem_cache *cifs_oplock_cachep; | |
290 | static struct kmem_cache *cifs_sm_req_cachep; | |
1da177e4 LT |
291 | mempool_t *cifs_sm_req_poolp; |
292 | mempool_t *cifs_req_poolp; | |
293 | mempool_t *cifs_mid_poolp; | |
294 | ||
295 | static struct inode * | |
296 | cifs_alloc_inode(struct super_block *sb) | |
297 | { | |
298 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 299 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
300 | if (!cifs_inode) |
301 | return NULL; | |
302 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
303 | atomic_set(&cifs_inode->inUse, 0); | |
304 | cifs_inode->time = 0; | |
cea21805 | 305 | cifs_inode->write_behind_rc = 0; |
1da177e4 LT |
306 | /* Until the file is open and we have gotten oplock |
307 | info back from the server, can not assume caching of | |
308 | file data or metadata */ | |
309 | cifs_inode->clientCanCacheRead = FALSE; | |
310 | cifs_inode->clientCanCacheAll = FALSE; | |
1da177e4 | 311 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
50c2f753 | 312 | |
1b2b2126 SF |
313 | /* Can not set i_flags here - they get immediately overwritten |
314 | to zero by the VFS */ | |
315 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
316 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
317 | return &cifs_inode->vfs_inode; | |
318 | } | |
319 | ||
320 | static void | |
321 | cifs_destroy_inode(struct inode *inode) | |
322 | { | |
323 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
324 | } | |
325 | ||
326 | /* | |
327 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
328 | * Not all settable options are displayed but most of the important | |
329 | * ones are. | |
330 | */ | |
331 | static int | |
332 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
333 | { | |
334 | struct cifs_sb_info *cifs_sb; | |
335 | ||
336 | cifs_sb = CIFS_SB(m->mnt_sb); | |
337 | ||
338 | if (cifs_sb) { | |
339 | if (cifs_sb->tcon) { | |
004c46b9 | 340 | /* BB add prepath to mount options displayed */ |
1da177e4 LT |
341 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); |
342 | if (cifs_sb->tcon->ses) { | |
343 | if (cifs_sb->tcon->ses->userName) | |
344 | seq_printf(s, ",username=%s", | |
345 | cifs_sb->tcon->ses->userName); | |
4523cc30 | 346 | if (cifs_sb->tcon->ses->domainName) |
1da177e4 LT |
347 | seq_printf(s, ",domain=%s", |
348 | cifs_sb->tcon->ses->domainName); | |
349 | } | |
d5d18501 SF |
350 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) || |
351 | !(cifs_sb->tcon->unix_ext)) | |
352 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); | |
353 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) || | |
354 | !(cifs_sb->tcon->unix_ext)) | |
355 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); | |
1da177e4 | 356 | } |
4523cc30 SF |
357 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
358 | seq_printf(s, ",posixpaths"); | |
50c2f753 SF |
359 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); |
360 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
1da177e4 LT |
361 | } |
362 | return 0; | |
363 | } | |
364 | ||
365 | #ifdef CONFIG_CIFS_QUOTA | |
50c2f753 SF |
366 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, |
367 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
368 | { |
369 | int xid; | |
370 | int rc = 0; | |
371 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
372 | struct cifsTconInfo *pTcon; | |
50c2f753 | 373 | |
4523cc30 | 374 | if (cifs_sb) |
1da177e4 LT |
375 | pTcon = cifs_sb->tcon; |
376 | else | |
377 | return -EIO; | |
378 | ||
379 | ||
380 | xid = GetXid(); | |
4523cc30 | 381 | if (pTcon) { |
50c2f753 | 382 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 | 383 | } else { |
95ba7362 | 384 | rc = -EIO; |
1da177e4 LT |
385 | } |
386 | ||
387 | FreeXid(xid); | |
388 | return rc; | |
389 | } | |
390 | ||
50c2f753 SF |
391 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, |
392 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
393 | { |
394 | int xid; | |
395 | int rc = 0; | |
396 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
397 | struct cifsTconInfo *pTcon; | |
398 | ||
4523cc30 | 399 | if (cifs_sb) |
1da177e4 LT |
400 | pTcon = cifs_sb->tcon; |
401 | else | |
402 | return -EIO; | |
403 | ||
404 | xid = GetXid(); | |
4523cc30 | 405 | if (pTcon) { |
50c2f753 | 406 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 LT |
407 | } else { |
408 | rc = -EIO; | |
409 | } | |
410 | ||
411 | FreeXid(xid); | |
412 | return rc; | |
413 | } | |
414 | ||
50c2f753 | 415 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) |
1da177e4 | 416 | { |
50c2f753 | 417 | int xid; |
1da177e4 LT |
418 | int rc = 0; |
419 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
420 | struct cifsTconInfo *pTcon; | |
421 | ||
4523cc30 | 422 | if (cifs_sb) |
1da177e4 LT |
423 | pTcon = cifs_sb->tcon; |
424 | else | |
425 | return -EIO; | |
426 | ||
427 | xid = GetXid(); | |
4523cc30 | 428 | if (pTcon) { |
50c2f753 | 429 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); |
1da177e4 LT |
430 | } else { |
431 | rc = -EIO; | |
432 | } | |
433 | ||
434 | FreeXid(xid); | |
435 | return rc; | |
436 | } | |
437 | ||
50c2f753 | 438 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) |
1da177e4 LT |
439 | { |
440 | int xid; | |
441 | int rc = 0; | |
442 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
443 | struct cifsTconInfo *pTcon; | |
444 | ||
4523cc30 | 445 | if (cifs_sb) { |
1da177e4 LT |
446 | pTcon = cifs_sb->tcon; |
447 | } else { | |
448 | return -EIO; | |
449 | } | |
450 | xid = GetXid(); | |
4523cc30 | 451 | if (pTcon) { |
50c2f753 | 452 | cFYI(1, ("pqstats %p", qstats)); |
1da177e4 LT |
453 | } else { |
454 | rc = -EIO; | |
455 | } | |
456 | ||
457 | FreeXid(xid); | |
458 | return rc; | |
459 | } | |
460 | ||
461 | static struct quotactl_ops cifs_quotactl_ops = { | |
462 | .set_xquota = cifs_xquota_set, | |
463 | .get_xquota = cifs_xquota_set, | |
464 | .set_xstate = cifs_xstate_set, | |
465 | .get_xstate = cifs_xstate_get, | |
466 | }; | |
467 | #endif | |
468 | ||
50c2f753 | 469 | static void cifs_umount_begin(struct vfsmount *vfsmnt, int flags) |
68058e75 | 470 | { |
5e1253b5 | 471 | struct cifs_sb_info *cifs_sb; |
50c2f753 | 472 | struct cifsTconInfo *tcon; |
68058e75 | 473 | |
6d5ae0de IM |
474 | #ifdef CONFIG_CIFS_DFS_UPCALL |
475 | dfs_shrink_umount_helper(vfsmnt); | |
476 | #endif /* CONFIG CIFS_DFS_UPCALL */ | |
477 | ||
8b512d9a TM |
478 | if (!(flags & MNT_FORCE)) |
479 | return; | |
480 | cifs_sb = CIFS_SB(vfsmnt->mnt_sb); | |
4523cc30 | 481 | if (cifs_sb == NULL) |
9e2e85f8 SF |
482 | return; |
483 | ||
484 | tcon = cifs_sb->tcon; | |
4523cc30 | 485 | if (tcon == NULL) |
9e2e85f8 | 486 | return; |
5e1253b5 SF |
487 | down(&tcon->tconSem); |
488 | if (atomic_read(&tcon->useCount) == 1) | |
489 | tcon->tidStatus = CifsExiting; | |
490 | up(&tcon->tconSem); | |
491 | ||
3a5ff61c | 492 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 493 | /* cancel_notify_requests(tcon); */ |
50c2f753 SF |
494 | if (tcon->ses && tcon->ses->server) { |
495 | cFYI(1, ("wake up tasks now - umount begin not complete")); | |
9e2e85f8 | 496 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
497 | wake_up_all(&tcon->ses->server->response_q); |
498 | msleep(1); /* yield */ | |
499 | /* we have to kick the requests once more */ | |
500 | wake_up_all(&tcon->ses->server->response_q); | |
501 | msleep(1); | |
5e1253b5 SF |
502 | } |
503 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
504 | |
505 | return; | |
506 | } | |
68058e75 | 507 | |
bf97d287 SF |
508 | #ifdef CONFIG_CIFS_STATS2 |
509 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
510 | { | |
511 | /* BB FIXME */ | |
512 | return 0; | |
513 | } | |
514 | #endif | |
515 | ||
1da177e4 LT |
516 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
517 | { | |
518 | *flags |= MS_NODIRATIME; | |
519 | return 0; | |
520 | } | |
521 | ||
ee9b6d61 | 522 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
523 | .read_inode = cifs_read_inode, |
524 | .put_super = cifs_put_super, | |
525 | .statfs = cifs_statfs, | |
526 | .alloc_inode = cifs_alloc_inode, | |
527 | .destroy_inode = cifs_destroy_inode, | |
50c2f753 SF |
528 | /* .drop_inode = generic_delete_inode, |
529 | .delete_inode = cifs_delete_inode, */ /* Do not need above two | |
530 | functions unless later we add lazy close of inodes or unless the | |
531 | kernel forgets to call us with the same number of releases (closes) | |
532 | as opens */ | |
1da177e4 | 533 | .show_options = cifs_show_options, |
7b7abfe3 | 534 | .umount_begin = cifs_umount_begin, |
1da177e4 | 535 | .remount_fs = cifs_remount, |
bf97d287 | 536 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 537 | .show_stats = cifs_show_stats, |
bf97d287 | 538 | #endif |
1da177e4 LT |
539 | }; |
540 | ||
454e2398 | 541 | static int |
1da177e4 | 542 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 543 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
544 | { |
545 | int rc; | |
546 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
547 | ||
548 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
549 | ||
550 | if (IS_ERR(sb)) | |
454e2398 | 551 | return PTR_ERR(sb); |
1da177e4 LT |
552 | |
553 | sb->s_flags = flags; | |
554 | ||
9b04c997 | 555 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
556 | if (rc) { |
557 | up_write(&sb->s_umount); | |
558 | deactivate_super(sb); | |
454e2398 | 559 | return rc; |
1da177e4 LT |
560 | } |
561 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 562 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
563 | } |
564 | ||
027445c3 BP |
565 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
566 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 567 | { |
e6a00296 | 568 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
569 | ssize_t written; |
570 | ||
027445c3 | 571 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
572 | if (!CIFS_I(inode)->clientCanCacheAll) |
573 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
574 | return written; |
575 | } | |
576 | ||
c32a0b68 SF |
577 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
578 | { | |
579 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 580 | if (origin == SEEK_END) { |
030e9d81 SF |
581 | int retval; |
582 | ||
583 | /* some applications poll for the file length in this strange | |
584 | way so we must seek to end on non-oplocked files by | |
585 | setting the revalidate time to zero */ | |
c33f8d32 | 586 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 SF |
587 | |
588 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
589 | if (retval < 0) |
590 | return (loff_t)retval; | |
591 | } | |
592 | return remote_llseek(file, offset, origin); | |
593 | } | |
594 | ||
e6ab1582 | 595 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
596 | .owner = THIS_MODULE, |
597 | .name = "cifs", | |
598 | .get_sb = cifs_get_sb, | |
599 | .kill_sb = kill_anon_super, | |
600 | /* .fs_flags */ | |
601 | }; | |
754661f1 | 602 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
603 | .create = cifs_create, |
604 | .lookup = cifs_lookup, | |
605 | .getattr = cifs_getattr, | |
606 | .unlink = cifs_unlink, | |
607 | .link = cifs_hardlink, | |
608 | .mkdir = cifs_mkdir, | |
609 | .rmdir = cifs_rmdir, | |
610 | .rename = cifs_rename, | |
611 | .permission = cifs_permission, | |
612 | /* revalidate:cifs_revalidate, */ | |
613 | .setattr = cifs_setattr, | |
614 | .symlink = cifs_symlink, | |
615 | .mknod = cifs_mknod, | |
616 | #ifdef CONFIG_CIFS_XATTR | |
617 | .setxattr = cifs_setxattr, | |
618 | .getxattr = cifs_getxattr, | |
619 | .listxattr = cifs_listxattr, | |
620 | .removexattr = cifs_removexattr, | |
621 | #endif | |
622 | }; | |
623 | ||
754661f1 | 624 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
625 | /* revalidate:cifs_revalidate, */ |
626 | .setattr = cifs_setattr, | |
627 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
628 | .rename = cifs_rename, | |
629 | .permission = cifs_permission, | |
630 | #ifdef CONFIG_CIFS_XATTR | |
631 | .setxattr = cifs_setxattr, | |
632 | .getxattr = cifs_getxattr, | |
633 | .listxattr = cifs_listxattr, | |
634 | .removexattr = cifs_removexattr, | |
50c2f753 | 635 | #endif |
1da177e4 LT |
636 | }; |
637 | ||
754661f1 | 638 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 639 | .readlink = generic_readlink, |
1da177e4 LT |
640 | .follow_link = cifs_follow_link, |
641 | .put_link = cifs_put_link, | |
642 | .permission = cifs_permission, | |
643 | /* BB add the following two eventually */ | |
644 | /* revalidate: cifs_revalidate, | |
645 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
646 | #ifdef CONFIG_CIFS_XATTR | |
647 | .setxattr = cifs_setxattr, | |
648 | .getxattr = cifs_getxattr, | |
649 | .listxattr = cifs_listxattr, | |
650 | .removexattr = cifs_removexattr, | |
50c2f753 | 651 | #endif |
1da177e4 LT |
652 | }; |
653 | ||
4b6f5d20 | 654 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
655 | .read = do_sync_read, |
656 | .write = do_sync_write, | |
87c89dd7 SF |
657 | .aio_read = generic_file_aio_read, |
658 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
659 | .open = cifs_open, |
660 | .release = cifs_close, | |
661 | .lock = cifs_lock, | |
662 | .fsync = cifs_fsync, | |
663 | .flush = cifs_flush, | |
664 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 665 | .splice_read = generic_file_splice_read, |
c32a0b68 | 666 | .llseek = cifs_llseek, |
c67593a0 SF |
667 | #ifdef CONFIG_CIFS_POSIX |
668 | .ioctl = cifs_ioctl, | |
669 | #endif /* CONFIG_CIFS_POSIX */ | |
670 | ||
1da177e4 | 671 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 LT |
672 | .dir_notify = cifs_dir_notify, |
673 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
674 | }; | |
675 | ||
4b6f5d20 | 676 | const struct file_operations cifs_file_direct_ops = { |
50c2f753 | 677 | /* no mmap, no aio, no readv - |
1da177e4 LT |
678 | BB reevaluate whether they can be done with directio, no cache */ |
679 | .read = cifs_user_read, | |
680 | .write = cifs_user_write, | |
681 | .open = cifs_open, | |
682 | .release = cifs_close, | |
683 | .lock = cifs_lock, | |
684 | .fsync = cifs_fsync, | |
685 | .flush = cifs_flush, | |
5ffc4ef4 | 686 | .splice_read = generic_file_splice_read, |
c67593a0 SF |
687 | #ifdef CONFIG_CIFS_POSIX |
688 | .ioctl = cifs_ioctl, | |
689 | #endif /* CONFIG_CIFS_POSIX */ | |
c32a0b68 | 690 | .llseek = cifs_llseek, |
1da177e4 LT |
691 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
692 | .dir_notify = cifs_dir_notify, | |
693 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
694 | }; | |
4b6f5d20 | 695 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
696 | .read = do_sync_read, |
697 | .write = do_sync_write, | |
87c89dd7 SF |
698 | .aio_read = generic_file_aio_read, |
699 | .aio_write = cifs_file_aio_write, | |
700 | .open = cifs_open, | |
701 | .release = cifs_close, | |
702 | .fsync = cifs_fsync, | |
703 | .flush = cifs_flush, | |
704 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 705 | .splice_read = generic_file_splice_read, |
c32a0b68 | 706 | .llseek = cifs_llseek, |
8b94bcb9 | 707 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 708 | .ioctl = cifs_ioctl, |
8b94bcb9 SF |
709 | #endif /* CONFIG_CIFS_POSIX */ |
710 | ||
711 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 712 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
713 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
714 | }; | |
715 | ||
4b6f5d20 | 716 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 717 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
718 | BB reevaluate whether they can be done with directio, no cache */ |
719 | .read = cifs_user_read, | |
720 | .write = cifs_user_write, | |
721 | .open = cifs_open, | |
722 | .release = cifs_close, | |
723 | .fsync = cifs_fsync, | |
724 | .flush = cifs_flush, | |
5ffc4ef4 | 725 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 726 | #ifdef CONFIG_CIFS_POSIX |
87c89dd7 | 727 | .ioctl = cifs_ioctl, |
8b94bcb9 | 728 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 729 | .llseek = cifs_llseek, |
8b94bcb9 | 730 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 731 | .dir_notify = cifs_dir_notify, |
8b94bcb9 SF |
732 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
733 | }; | |
1da177e4 | 734 | |
4b6f5d20 | 735 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
736 | .readdir = cifs_readdir, |
737 | .release = cifs_closedir, | |
738 | .read = generic_read_dir, | |
739 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
740 | .dir_notify = cifs_dir_notify, | |
741 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
50c2f753 | 742 | .ioctl = cifs_ioctl, |
1da177e4 LT |
743 | }; |
744 | ||
745 | static void | |
4ba9b9d0 | 746 | cifs_init_once(struct kmem_cache *cachep, void *inode) |
1da177e4 LT |
747 | { |
748 | struct cifsInodeInfo *cifsi = inode; | |
749 | ||
a35afb83 CL |
750 | inode_init_once(&cifsi->vfs_inode); |
751 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
752 | } |
753 | ||
754 | static int | |
755 | cifs_init_inodecache(void) | |
756 | { | |
757 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 758 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
759 | 0, (SLAB_RECLAIM_ACCOUNT| |
760 | SLAB_MEM_SPREAD), | |
20c2df83 | 761 | cifs_init_once); |
1da177e4 LT |
762 | if (cifs_inode_cachep == NULL) |
763 | return -ENOMEM; | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | static void | |
769 | cifs_destroy_inodecache(void) | |
770 | { | |
1a1d92c1 | 771 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
772 | } |
773 | ||
774 | static int | |
775 | cifs_init_request_bufs(void) | |
776 | { | |
4523cc30 | 777 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
778 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
779 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
780 | CIFSMaxBufSize = 8192; | |
781 | } else if (CIFSMaxBufSize > 1024*127) { | |
782 | CIFSMaxBufSize = 1024 * 127; | |
783 | } else { | |
784 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
785 | } | |
786 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
787 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
788 | CIFSMaxBufSize + | |
789 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 790 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
791 | if (cifs_req_cachep == NULL) |
792 | return -ENOMEM; | |
793 | ||
4523cc30 | 794 | if (cifs_min_rcv < 1) |
1da177e4 LT |
795 | cifs_min_rcv = 1; |
796 | else if (cifs_min_rcv > 64) { | |
797 | cifs_min_rcv = 64; | |
50c2f753 | 798 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); |
1da177e4 LT |
799 | } |
800 | ||
93d2341c MD |
801 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
802 | cifs_req_cachep); | |
1da177e4 | 803 | |
4523cc30 | 804 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
805 | kmem_cache_destroy(cifs_req_cachep); |
806 | return -ENOMEM; | |
807 | } | |
ec637e3f | 808 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
809 | almost all handle based requests (but not write response, nor is it |
810 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 811 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
812 | for the case in which debug was on, but this larger size allows |
813 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 814 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
815 | alloc of large cifs buffers even when page debugging is on */ |
816 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 817 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 818 | NULL); |
1da177e4 LT |
819 | if (cifs_sm_req_cachep == NULL) { |
820 | mempool_destroy(cifs_req_poolp); | |
821 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 822 | return -ENOMEM; |
1da177e4 LT |
823 | } |
824 | ||
4523cc30 | 825 | if (cifs_min_small < 2) |
1da177e4 LT |
826 | cifs_min_small = 2; |
827 | else if (cifs_min_small > 256) { | |
828 | cifs_min_small = 256; | |
6dc0f87e | 829 | cFYI(1, ("cifs_min_small set to maximum (256)")); |
1da177e4 LT |
830 | } |
831 | ||
93d2341c MD |
832 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
833 | cifs_sm_req_cachep); | |
1da177e4 | 834 | |
4523cc30 | 835 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
836 | mempool_destroy(cifs_req_poolp); |
837 | kmem_cache_destroy(cifs_req_cachep); | |
838 | kmem_cache_destroy(cifs_sm_req_cachep); | |
839 | return -ENOMEM; | |
840 | } | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | static void | |
846 | cifs_destroy_request_bufs(void) | |
847 | { | |
848 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 849 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 850 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 851 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
852 | } |
853 | ||
854 | static int | |
855 | cifs_init_mids(void) | |
856 | { | |
857 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
858 | sizeof(struct mid_q_entry), 0, |
859 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
860 | if (cifs_mid_cachep == NULL) |
861 | return -ENOMEM; | |
862 | ||
93d2341c MD |
863 | /* 3 is a reasonable minimum number of simultaneous operations */ |
864 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 865 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
866 | kmem_cache_destroy(cifs_mid_cachep); |
867 | return -ENOMEM; | |
868 | } | |
869 | ||
870 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
26f57364 SF |
871 | sizeof(struct oplock_q_entry), 0, |
872 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 | 873 | if (cifs_oplock_cachep == NULL) { |
1da177e4 | 874 | mempool_destroy(cifs_mid_poolp); |
e6985c7f | 875 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
876 | return -ENOMEM; |
877 | } | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | static void | |
883 | cifs_destroy_mids(void) | |
884 | { | |
885 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
886 | kmem_cache_destroy(cifs_mid_cachep); |
887 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
888 | } |
889 | ||
50c2f753 | 890 | static int cifs_oplock_thread(void *dummyarg) |
1da177e4 | 891 | { |
6dc0f87e | 892 | struct oplock_q_entry *oplock_item; |
1da177e4 | 893 | struct cifsTconInfo *pTcon; |
6dc0f87e | 894 | struct inode *inode; |
1da177e4 | 895 | __u16 netfid; |
cea21805 | 896 | int rc, waitrc = 0; |
1da177e4 | 897 | |
83144186 | 898 | set_freezable(); |
1da177e4 | 899 | do { |
6dc0f87e | 900 | if (try_to_freeze()) |
ede1327e | 901 | continue; |
50c2f753 | 902 | |
1da177e4 | 903 | spin_lock(&GlobalMid_Lock); |
4523cc30 | 904 | if (list_empty(&GlobalOplock_Q)) { |
1da177e4 LT |
905 | spin_unlock(&GlobalMid_Lock); |
906 | set_current_state(TASK_INTERRUPTIBLE); | |
907 | schedule_timeout(39*HZ); | |
908 | } else { | |
6dc0f87e | 909 | oplock_item = list_entry(GlobalOplock_Q.next, |
1da177e4 | 910 | struct oplock_q_entry, qhead); |
4523cc30 | 911 | if (oplock_item) { |
50c2f753 | 912 | cFYI(1, ("found oplock item to write out")); |
1da177e4 LT |
913 | pTcon = oplock_item->tcon; |
914 | inode = oplock_item->pinode; | |
915 | netfid = oplock_item->netfid; | |
916 | spin_unlock(&GlobalMid_Lock); | |
917 | DeleteOplockQEntry(oplock_item); | |
918 | /* can not grab inode sem here since it would | |
6dc0f87e | 919 | deadlock when oplock received on delete |
1b1dcc1b | 920 | since vfs_unlink holds the i_mutex across |
1da177e4 | 921 | the call */ |
1b1dcc1b | 922 | /* mutex_lock(&inode->i_mutex);*/ |
1da177e4 | 923 | if (S_ISREG(inode->i_mode)) { |
26f57364 SF |
924 | rc = |
925 | filemap_fdatawrite(inode->i_mapping); | |
50c2f753 SF |
926 | if (CIFS_I(inode)->clientCanCacheRead |
927 | == 0) { | |
cea21805 | 928 | waitrc = filemap_fdatawait(inode->i_mapping); |
1da177e4 LT |
929 | invalidate_remote_inode(inode); |
930 | } | |
cea21805 JL |
931 | if (rc == 0) |
932 | rc = waitrc; | |
1da177e4 LT |
933 | } else |
934 | rc = 0; | |
1b1dcc1b | 935 | /* mutex_unlock(&inode->i_mutex);*/ |
1da177e4 LT |
936 | if (rc) |
937 | CIFS_I(inode)->write_behind_rc = rc; | |
6dc0f87e SF |
938 | cFYI(1, ("Oplock flush inode %p rc %d", |
939 | inode, rc)); | |
940 | ||
941 | /* releasing stale oplock after recent reconnect | |
942 | of smb session using a now incorrect file | |
943 | handle is not a data integrity issue but do | |
944 | not bother sending an oplock release if session | |
945 | to server still is disconnected since oplock | |
1da177e4 | 946 | already released by the server in that case */ |
4523cc30 | 947 | if (pTcon->tidStatus != CifsNeedReconnect) { |
1da177e4 | 948 | rc = CIFSSMBLock(0, pTcon, netfid, |
6dc0f87e | 949 | 0 /* len */ , 0 /* offset */, 0, |
1da177e4 LT |
950 | 0, LOCKING_ANDX_OPLOCK_RELEASE, |
951 | 0 /* wait flag */); | |
26f57364 | 952 | cFYI(1, ("Oplock release rc = %d", rc)); |
1da177e4 LT |
953 | } |
954 | } else | |
955 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
956 | set_current_state(TASK_INTERRUPTIBLE); |
957 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 958 | } |
45af7a0f SF |
959 | } while (!kthread_should_stop()); |
960 | ||
961 | return 0; | |
1da177e4 LT |
962 | } |
963 | ||
50c2f753 | 964 | static int cifs_dnotify_thread(void *dummyarg) |
8d0d5094 | 965 | { |
6ab16d24 SF |
966 | struct list_head *tmp; |
967 | struct cifsSesInfo *ses; | |
968 | ||
8d0d5094 | 969 | do { |
0fd1ffe0 | 970 | if (try_to_freeze()) |
16abbecd | 971 | continue; |
8d0d5094 | 972 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 SF |
973 | schedule_timeout(15*HZ); |
974 | read_lock(&GlobalSMBSeslock); | |
975 | /* check if any stuck requests that need | |
976 | to be woken up and wakeq so the | |
977 | thread can wake up and error out */ | |
978 | list_for_each(tmp, &GlobalSMBSessionList) { | |
6dc0f87e | 979 | ses = list_entry(tmp, struct cifsSesInfo, |
6ab16d24 | 980 | cifsSessionList); |
6dc0f87e | 981 | if (ses && ses->server && |
2a138ebb | 982 | atomic_read(&ses->server->inFlight)) |
6ab16d24 SF |
983 | wake_up_all(&ses->server->response_q); |
984 | } | |
985 | read_unlock(&GlobalSMBSeslock); | |
45af7a0f SF |
986 | } while (!kthread_should_stop()); |
987 | ||
988 | return 0; | |
1da177e4 LT |
989 | } |
990 | ||
991 | static int __init | |
992 | init_cifs(void) | |
993 | { | |
994 | int rc = 0; | |
995 | #ifdef CONFIG_PROC_FS | |
996 | cifs_proc_init(); | |
997 | #endif | |
2cd646a2 | 998 | /* INIT_LIST_HEAD(&GlobalServerList);*/ /* BB not implemented yet */ |
1da177e4 LT |
999 | INIT_LIST_HEAD(&GlobalSMBSessionList); |
1000 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
1001 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
4ca9c190 SF |
1002 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1003 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
1004 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 1005 | #endif |
1da177e4 LT |
1006 | /* |
1007 | * Initialize Global counters | |
1008 | */ | |
1009 | atomic_set(&sesInfoAllocCount, 0); | |
1010 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1011 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1012 | atomic_set(&tcpSesReconnectCount, 0); |
1013 | atomic_set(&tconInfoReconnectCount, 0); | |
1014 | ||
1015 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1016 | atomic_set(&smBufAllocCount, 0); |
1017 | #ifdef CONFIG_CIFS_STATS2 | |
1018 | atomic_set(&totBufAllocCount, 0); | |
1019 | atomic_set(&totSmBufAllocCount, 0); | |
1020 | #endif /* CONFIG_CIFS_STATS2 */ | |
1021 | ||
1da177e4 LT |
1022 | atomic_set(&midCount, 0); |
1023 | GlobalCurrentXid = 0; | |
1024 | GlobalTotalActiveXid = 0; | |
1025 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 1026 | memset(Local_System_Name, 0, 15); |
1da177e4 LT |
1027 | rwlock_init(&GlobalSMBSeslock); |
1028 | spin_lock_init(&GlobalMid_Lock); | |
1029 | ||
4523cc30 | 1030 | if (cifs_max_pending < 2) { |
1da177e4 | 1031 | cifs_max_pending = 2; |
6dc0f87e | 1032 | cFYI(1, ("cifs_max_pending set to min of 2")); |
4523cc30 | 1033 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1034 | cifs_max_pending = 256; |
6dc0f87e | 1035 | cFYI(1, ("cifs_max_pending set to max of 256")); |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
1039 | if (rc) |
1040 | goto out_clean_proc; | |
1041 | ||
1042 | rc = cifs_init_mids(); | |
1043 | if (rc) | |
1044 | goto out_destroy_inodecache; | |
1045 | ||
1046 | rc = cifs_init_request_bufs(); | |
1047 | if (rc) | |
1048 | goto out_destroy_mids; | |
1049 | ||
1050 | rc = register_filesystem(&cifs_fs_type); | |
1051 | if (rc) | |
1052 | goto out_destroy_request_bufs; | |
84a15b93 JL |
1053 | #ifdef CONFIG_CIFS_UPCALL |
1054 | rc = register_key_type(&cifs_spnego_key_type); | |
1055 | if (rc) | |
1056 | goto out_unregister_filesystem; | |
6103335d SF |
1057 | #endif |
1058 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1059 | rc = register_key_type(&key_type_dns_resolver); | |
1060 | if (rc) | |
1061 | goto out_unregister_key_type; | |
84a15b93 | 1062 | #endif |
45af7a0f SF |
1063 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); |
1064 | if (IS_ERR(oplockThread)) { | |
1065 | rc = PTR_ERR(oplockThread); | |
6dc0f87e | 1066 | cERROR(1, ("error %d create oplock thread", rc)); |
6103335d | 1067 | goto out_unregister_dfs_key_type; |
1da177e4 | 1068 | } |
45af7a0f SF |
1069 | |
1070 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1071 | if (IS_ERR(dnotifyThread)) { | |
1072 | rc = PTR_ERR(dnotifyThread); | |
6dc0f87e | 1073 | cERROR(1, ("error %d create dnotify thread", rc)); |
45af7a0f SF |
1074 | goto out_stop_oplock_thread; |
1075 | } | |
1076 | ||
1077 | return 0; | |
1078 | ||
1079 | out_stop_oplock_thread: | |
1080 | kthread_stop(oplockThread); | |
6103335d SF |
1081 | out_unregister_dfs_key_type: |
1082 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1083 | unregister_key_type(&key_type_dns_resolver); | |
84a15b93 | 1084 | out_unregister_key_type: |
6103335d | 1085 | #endif |
84a15b93 JL |
1086 | #ifdef CONFIG_CIFS_UPCALL |
1087 | unregister_key_type(&cifs_spnego_key_type); | |
45af7a0f | 1088 | out_unregister_filesystem: |
84a15b93 | 1089 | #endif |
45af7a0f SF |
1090 | unregister_filesystem(&cifs_fs_type); |
1091 | out_destroy_request_bufs: | |
1092 | cifs_destroy_request_bufs(); | |
1093 | out_destroy_mids: | |
1094 | cifs_destroy_mids(); | |
1095 | out_destroy_inodecache: | |
1096 | cifs_destroy_inodecache(); | |
1097 | out_clean_proc: | |
1da177e4 LT |
1098 | #ifdef CONFIG_PROC_FS |
1099 | cifs_proc_clean(); | |
1100 | #endif | |
1101 | return rc; | |
1102 | } | |
1103 | ||
1104 | static void __exit | |
1105 | exit_cifs(void) | |
1106 | { | |
63135e08 | 1107 | cFYI(0, ("exit_cifs")); |
1da177e4 LT |
1108 | #ifdef CONFIG_PROC_FS |
1109 | cifs_proc_clean(); | |
84a15b93 | 1110 | #endif |
6103335d SF |
1111 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1112 | unregister_key_type(&key_type_dns_resolver); | |
1113 | #endif | |
84a15b93 JL |
1114 | #ifdef CONFIG_CIFS_UPCALL |
1115 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1116 | #endif |
1117 | unregister_filesystem(&cifs_fs_type); | |
1118 | cifs_destroy_inodecache(); | |
1119 | cifs_destroy_mids(); | |
1120 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1121 | kthread_stop(oplockThread); |
1122 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1123 | } |
1124 | ||
1125 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1126 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1127 | MODULE_DESCRIPTION |
63135e08 SF |
1128 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1129 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1130 | MODULE_VERSION(CIFS_VERSION); |
1131 | module_init(init_cifs) | |
1132 | module_exit(exit_cifs) |