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1 | /* | |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2002,2008 | |
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> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/kthread.h> | |
37 | #include <linux/freezer.h> | |
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 | #include <linux/key-type.h> | |
47 | #include "dns_resolve.h" | |
48 | #include "cifs_spnego.h" | |
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; | |
53 | #endif /* QUOTA */ | |
54 | ||
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; | |
63 | unsigned int extended_security = CIFSSEC_DEF; | |
64 | /* unsigned int ntlmv2_support = 0; */ | |
65 | unsigned int sign_CIFS_PDUs = 1; | |
66 | extern struct task_struct *oplockThread; /* remove sparse warning */ | |
67 | struct task_struct *oplockThread = NULL; | |
68 | /* extern struct task_struct * dnotifyThread; remove sparse warning */ | |
69 | static struct task_struct *dnotifyThread = NULL; | |
70 | static const struct super_operations cifs_super_ops; | |
71 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; | |
72 | module_param(CIFSMaxBufSize, int, 0); | |
73 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " | |
74 | "Default: 16384 Range: 8192 to 130048"); | |
75 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; | |
76 | module_param(cifs_min_rcv, int, 0); | |
77 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " | |
78 | "1 to 64"); | |
79 | unsigned int cifs_min_small = 30; | |
80 | module_param(cifs_min_small, int, 0); | |
81 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " | |
82 | "Range: 2 to 256"); | |
83 | unsigned int cifs_max_pending = CIFS_MAX_REQ; | |
84 | module_param(cifs_max_pending, int, 0); | |
85 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " | |
86 | "Default: 50 Range: 2 to 256"); | |
87 | ||
88 | extern mempool_t *cifs_sm_req_poolp; | |
89 | extern mempool_t *cifs_req_poolp; | |
90 | extern mempool_t *cifs_mid_poolp; | |
91 | ||
92 | extern struct kmem_cache *cifs_oplock_cachep; | |
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; | |
101 | ||
102 | /* BB should we make this contingent on mount parm? */ | |
103 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
104 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
105 | cifs_sb = CIFS_SB(sb); | |
106 | if (cifs_sb == NULL) | |
107 | return -ENOMEM; | |
108 | ||
109 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
110 | /* copy mount params to sb for use in submounts */ | |
111 | /* BB: should we move this after the mount so we | |
112 | * do not have to do the copy on failed mounts? | |
113 | * BB: May be it is better to do simple copy before | |
114 | * complex operation (mount), and in case of fail | |
115 | * just exit instead of doing mount and attempting | |
116 | * undo it if this copy fails?*/ | |
117 | if (data) { | |
118 | int len = strlen(data); | |
119 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
120 | if (cifs_sb->mountdata == NULL) { | |
121 | kfree(sb->s_fs_info); | |
122 | sb->s_fs_info = NULL; | |
123 | return -ENOMEM; | |
124 | } | |
125 | strncpy(cifs_sb->mountdata, data, len + 1); | |
126 | cifs_sb->mountdata[len] = '\0'; | |
127 | } | |
128 | #endif | |
129 | ||
130 | rc = cifs_mount(sb, cifs_sb, data, devname); | |
131 | ||
132 | if (rc) { | |
133 | if (!silent) | |
134 | cERROR(1, | |
135 | ("cifs_mount failed w/return code = %d", rc)); | |
136 | goto out_mount_failed; | |
137 | } | |
138 | ||
139 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
140 | sb->s_op = &cifs_super_ops; | |
141 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) | |
142 | sb->s_blocksize = | |
143 | cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
144 | #ifdef CONFIG_CIFS_QUOTA | |
145 | sb->s_qcop = &cifs_quotactl_ops; | |
146 | #endif | |
147 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
148 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
149 | inode = cifs_iget(sb, ROOT_I); | |
150 | ||
151 | if (IS_ERR(inode)) { | |
152 | rc = PTR_ERR(inode); | |
153 | inode = NULL; | |
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 | } | |
163 | ||
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 */ | |
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 | cifs_umount(sb, cifs_sb); | |
179 | ||
180 | out_mount_failed: | |
181 | if (cifs_sb) { | |
182 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
183 | if (cifs_sb->mountdata) { | |
184 | kfree(cifs_sb->mountdata); | |
185 | cifs_sb->mountdata = NULL; | |
186 | } | |
187 | #endif | |
188 | if (cifs_sb->local_nls) | |
189 | unload_nls(cifs_sb->local_nls); | |
190 | kfree(cifs_sb); | |
191 | } | |
192 | return rc; | |
193 | } | |
194 | ||
195 | static void | |
196 | cifs_put_super(struct super_block *sb) | |
197 | { | |
198 | int rc = 0; | |
199 | struct cifs_sb_info *cifs_sb; | |
200 | ||
201 | cFYI(1, ("In cifs_put_super")); | |
202 | cifs_sb = CIFS_SB(sb); | |
203 | if (cifs_sb == NULL) { | |
204 | cFYI(1, ("Empty cifs superblock info passed to unmount")); | |
205 | return; | |
206 | } | |
207 | rc = cifs_umount(sb, cifs_sb); | |
208 | if (rc) | |
209 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
210 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
211 | if (cifs_sb->mountdata) { | |
212 | kfree(cifs_sb->mountdata); | |
213 | cifs_sb->mountdata = NULL; | |
214 | } | |
215 | #endif | |
216 | ||
217 | unload_nls(cifs_sb->local_nls); | |
218 | kfree(cifs_sb); | |
219 | return; | |
220 | } | |
221 | ||
222 | static int | |
223 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) | |
224 | { | |
225 | struct super_block *sb = dentry->d_sb; | |
226 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
227 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
228 | int rc = -EOPNOTSUPP; | |
229 | int xid; | |
230 | ||
231 | xid = GetXid(); | |
232 | ||
233 | buf->f_type = CIFS_MAGIC_NUMBER; | |
234 | ||
235 | /* | |
236 | * PATH_MAX may be too long - it would presumably be total path, | |
237 | * but note that some servers (includinng Samba 3) have a shorter | |
238 | * maximum path. | |
239 | * | |
240 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
241 | */ | |
242 | buf->f_namelen = PATH_MAX; | |
243 | buf->f_files = 0; /* undefined */ | |
244 | buf->f_ffree = 0; /* unlimited */ | |
245 | ||
246 | /* | |
247 | * We could add a second check for a QFS Unix capability bit | |
248 | */ | |
249 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
250 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
251 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
252 | ||
253 | /* | |
254 | * Only need to call the old QFSInfo if failed on newer one, | |
255 | * e.g. by OS/2. | |
256 | **/ | |
257 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
258 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
259 | ||
260 | /* | |
261 | * Some old Windows servers also do not support level 103, retry with | |
262 | * older level one if old server failed the previous call or we | |
263 | * bypassed it because we detected that this was an older LANMAN sess | |
264 | */ | |
265 | if (rc) | |
266 | rc = SMBOldQFSInfo(xid, tcon, buf); | |
267 | ||
268 | FreeXid(xid); | |
269 | return 0; | |
270 | } | |
271 | ||
272 | static int cifs_permission(struct inode *inode, int mask) | |
273 | { | |
274 | struct cifs_sb_info *cifs_sb; | |
275 | ||
276 | cifs_sb = CIFS_SB(inode->i_sb); | |
277 | ||
278 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
279 | return 0; | |
280 | else /* file mode might have been restricted at mount time | |
281 | on the client (above and beyond ACL on servers) for | |
282 | servers which do not support setting and viewing mode bits, | |
283 | so allowing client to check permissions is useful */ | |
284 | return generic_permission(inode, mask, NULL); | |
285 | } | |
286 | ||
287 | static struct kmem_cache *cifs_inode_cachep; | |
288 | static struct kmem_cache *cifs_req_cachep; | |
289 | static struct kmem_cache *cifs_mid_cachep; | |
290 | struct kmem_cache *cifs_oplock_cachep; | |
291 | static struct kmem_cache *cifs_sm_req_cachep; | |
292 | mempool_t *cifs_sm_req_poolp; | |
293 | mempool_t *cifs_req_poolp; | |
294 | mempool_t *cifs_mid_poolp; | |
295 | ||
296 | static struct inode * | |
297 | cifs_alloc_inode(struct super_block *sb) | |
298 | { | |
299 | struct cifsInodeInfo *cifs_inode; | |
300 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); | |
301 | if (!cifs_inode) | |
302 | return NULL; | |
303 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
304 | atomic_set(&cifs_inode->inUse, 0); | |
305 | cifs_inode->time = 0; | |
306 | cifs_inode->write_behind_rc = 0; | |
307 | /* Until the file is open and we have gotten oplock | |
308 | info back from the server, can not assume caching of | |
309 | file data or metadata */ | |
310 | cifs_inode->clientCanCacheRead = false; | |
311 | cifs_inode->clientCanCacheAll = false; | |
312 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ | |
313 | ||
314 | /* Can not set i_flags here - they get immediately overwritten | |
315 | to zero by the VFS */ | |
316 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
317 | INIT_LIST_HEAD(&cifs_inode->openFileList); | |
318 | return &cifs_inode->vfs_inode; | |
319 | } | |
320 | ||
321 | static void | |
322 | cifs_destroy_inode(struct inode *inode) | |
323 | { | |
324 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
325 | } | |
326 | ||
327 | /* | |
328 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
329 | * Not all settable options are displayed but most of the important | |
330 | * ones are. | |
331 | */ | |
332 | static int | |
333 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
334 | { | |
335 | struct cifs_sb_info *cifs_sb; | |
336 | ||
337 | cifs_sb = CIFS_SB(m->mnt_sb); | |
338 | ||
339 | if (cifs_sb) { | |
340 | if (cifs_sb->tcon) { | |
341 | /* BB add prepath to mount options displayed */ | |
342 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); | |
343 | if (cifs_sb->tcon->ses) { | |
344 | if (cifs_sb->tcon->ses->userName) | |
345 | seq_printf(s, ",username=%s", | |
346 | cifs_sb->tcon->ses->userName); | |
347 | if (cifs_sb->tcon->ses->domainName) | |
348 | seq_printf(s, ",domain=%s", | |
349 | cifs_sb->tcon->ses->domainName); | |
350 | } | |
351 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) || | |
352 | !(cifs_sb->tcon->unix_ext)) | |
353 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); | |
354 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) || | |
355 | !(cifs_sb->tcon->unix_ext)) | |
356 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); | |
357 | if (!cifs_sb->tcon->unix_ext) { | |
358 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
359 | cifs_sb->mnt_file_mode, | |
360 | cifs_sb->mnt_dir_mode); | |
361 | } | |
362 | if (cifs_sb->tcon->seal) | |
363 | seq_printf(s, ",seal"); | |
364 | if (cifs_sb->tcon->nocase) | |
365 | seq_printf(s, ",nocase"); | |
366 | if (cifs_sb->tcon->retry) | |
367 | seq_printf(s, ",hard"); | |
368 | } | |
369 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
370 | seq_printf(s, ",posixpaths"); | |
371 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
372 | seq_printf(s, ",setuids"); | |
373 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
374 | seq_printf(s, ",serverino"); | |
375 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
376 | seq_printf(s, ",directio"); | |
377 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
378 | seq_printf(s, ",nouser_xattr"); | |
379 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
380 | seq_printf(s, ",mapchars"); | |
381 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
382 | seq_printf(s, ",sfu"); | |
383 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
384 | seq_printf(s, ",nobrl"); | |
385 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
386 | seq_printf(s, ",cifsacl"); | |
387 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
388 | seq_printf(s, ",dynperm"); | |
389 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
390 | seq_printf(s, ",acl"); | |
391 | ||
392 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
393 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
394 | } | |
395 | return 0; | |
396 | } | |
397 | ||
398 | #ifdef CONFIG_CIFS_QUOTA | |
399 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, | |
400 | struct fs_disk_quota *pdquota) | |
401 | { | |
402 | int xid; | |
403 | int rc = 0; | |
404 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
405 | struct cifsTconInfo *pTcon; | |
406 | ||
407 | if (cifs_sb) | |
408 | pTcon = cifs_sb->tcon; | |
409 | else | |
410 | return -EIO; | |
411 | ||
412 | ||
413 | xid = GetXid(); | |
414 | if (pTcon) { | |
415 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); | |
416 | } else { | |
417 | rc = -EIO; | |
418 | } | |
419 | ||
420 | FreeXid(xid); | |
421 | return rc; | |
422 | } | |
423 | ||
424 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, | |
425 | struct fs_disk_quota *pdquota) | |
426 | { | |
427 | int xid; | |
428 | int rc = 0; | |
429 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
430 | struct cifsTconInfo *pTcon; | |
431 | ||
432 | if (cifs_sb) | |
433 | pTcon = cifs_sb->tcon; | |
434 | else | |
435 | return -EIO; | |
436 | ||
437 | xid = GetXid(); | |
438 | if (pTcon) { | |
439 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); | |
440 | } else { | |
441 | rc = -EIO; | |
442 | } | |
443 | ||
444 | FreeXid(xid); | |
445 | return rc; | |
446 | } | |
447 | ||
448 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) | |
449 | { | |
450 | int xid; | |
451 | int rc = 0; | |
452 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
453 | struct cifsTconInfo *pTcon; | |
454 | ||
455 | if (cifs_sb) | |
456 | pTcon = cifs_sb->tcon; | |
457 | else | |
458 | return -EIO; | |
459 | ||
460 | xid = GetXid(); | |
461 | if (pTcon) { | |
462 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); | |
463 | } else { | |
464 | rc = -EIO; | |
465 | } | |
466 | ||
467 | FreeXid(xid); | |
468 | return rc; | |
469 | } | |
470 | ||
471 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) | |
472 | { | |
473 | int xid; | |
474 | int rc = 0; | |
475 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
476 | struct cifsTconInfo *pTcon; | |
477 | ||
478 | if (cifs_sb) { | |
479 | pTcon = cifs_sb->tcon; | |
480 | } else { | |
481 | return -EIO; | |
482 | } | |
483 | xid = GetXid(); | |
484 | if (pTcon) { | |
485 | cFYI(1, ("pqstats %p", qstats)); | |
486 | } else { | |
487 | rc = -EIO; | |
488 | } | |
489 | ||
490 | FreeXid(xid); | |
491 | return rc; | |
492 | } | |
493 | ||
494 | static struct quotactl_ops cifs_quotactl_ops = { | |
495 | .set_xquota = cifs_xquota_set, | |
496 | .get_xquota = cifs_xquota_get, | |
497 | .set_xstate = cifs_xstate_set, | |
498 | .get_xstate = cifs_xstate_get, | |
499 | }; | |
500 | #endif | |
501 | ||
502 | static void cifs_umount_begin(struct super_block *sb) | |
503 | { | |
504 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
505 | struct cifsTconInfo *tcon; | |
506 | ||
507 | if (cifs_sb == NULL) | |
508 | return; | |
509 | ||
510 | tcon = cifs_sb->tcon; | |
511 | if (tcon == NULL) | |
512 | return; | |
513 | down(&tcon->tconSem); | |
514 | if (atomic_read(&tcon->useCount) == 1) | |
515 | tcon->tidStatus = CifsExiting; | |
516 | up(&tcon->tconSem); | |
517 | ||
518 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ | |
519 | /* cancel_notify_requests(tcon); */ | |
520 | if (tcon->ses && tcon->ses->server) { | |
521 | cFYI(1, ("wake up tasks now - umount begin not complete")); | |
522 | wake_up_all(&tcon->ses->server->request_q); | |
523 | wake_up_all(&tcon->ses->server->response_q); | |
524 | msleep(1); /* yield */ | |
525 | /* we have to kick the requests once more */ | |
526 | wake_up_all(&tcon->ses->server->response_q); | |
527 | msleep(1); | |
528 | } | |
529 | /* BB FIXME - finish add checks for tidStatus BB */ | |
530 | ||
531 | return; | |
532 | } | |
533 | ||
534 | #ifdef CONFIG_CIFS_STATS2 | |
535 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
536 | { | |
537 | /* BB FIXME */ | |
538 | return 0; | |
539 | } | |
540 | #endif | |
541 | ||
542 | static int cifs_remount(struct super_block *sb, int *flags, char *data) | |
543 | { | |
544 | *flags |= MS_NODIRATIME; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static const struct super_operations cifs_super_ops = { | |
549 | .put_super = cifs_put_super, | |
550 | .statfs = cifs_statfs, | |
551 | .alloc_inode = cifs_alloc_inode, | |
552 | .destroy_inode = cifs_destroy_inode, | |
553 | /* .drop_inode = generic_delete_inode, | |
554 | .delete_inode = cifs_delete_inode, */ /* Do not need above two | |
555 | functions unless later we add lazy close of inodes or unless the | |
556 | kernel forgets to call us with the same number of releases (closes) | |
557 | as opens */ | |
558 | .show_options = cifs_show_options, | |
559 | .umount_begin = cifs_umount_begin, | |
560 | .remount_fs = cifs_remount, | |
561 | #ifdef CONFIG_CIFS_STATS2 | |
562 | .show_stats = cifs_show_stats, | |
563 | #endif | |
564 | }; | |
565 | ||
566 | static int | |
567 | cifs_get_sb(struct file_system_type *fs_type, | |
568 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
569 | { | |
570 | int rc; | |
571 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
572 | ||
573 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
574 | ||
575 | if (IS_ERR(sb)) | |
576 | return PTR_ERR(sb); | |
577 | ||
578 | sb->s_flags = flags; | |
579 | ||
580 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); | |
581 | if (rc) { | |
582 | up_write(&sb->s_umount); | |
583 | deactivate_super(sb); | |
584 | return rc; | |
585 | } | |
586 | sb->s_flags |= MS_ACTIVE; | |
587 | return simple_set_mnt(mnt, sb); | |
588 | } | |
589 | ||
590 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
591 | unsigned long nr_segs, loff_t pos) | |
592 | { | |
593 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; | |
594 | ssize_t written; | |
595 | ||
596 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); | |
597 | if (!CIFS_I(inode)->clientCanCacheAll) | |
598 | filemap_fdatawrite(inode->i_mapping); | |
599 | return written; | |
600 | } | |
601 | ||
602 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) | |
603 | { | |
604 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
605 | if (origin == SEEK_END) { | |
606 | int retval; | |
607 | ||
608 | /* some applications poll for the file length in this strange | |
609 | way so we must seek to end on non-oplocked files by | |
610 | setting the revalidate time to zero */ | |
611 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; | |
612 | ||
613 | retval = cifs_revalidate(file->f_path.dentry); | |
614 | if (retval < 0) | |
615 | return (loff_t)retval; | |
616 | } | |
617 | return generic_file_llseek_unlocked(file, offset, origin); | |
618 | } | |
619 | ||
620 | struct file_system_type cifs_fs_type = { | |
621 | .owner = THIS_MODULE, | |
622 | .name = "cifs", | |
623 | .get_sb = cifs_get_sb, | |
624 | .kill_sb = kill_anon_super, | |
625 | /* .fs_flags */ | |
626 | }; | |
627 | const struct inode_operations cifs_dir_inode_ops = { | |
628 | .create = cifs_create, | |
629 | .lookup = cifs_lookup, | |
630 | .getattr = cifs_getattr, | |
631 | .unlink = cifs_unlink, | |
632 | .link = cifs_hardlink, | |
633 | .mkdir = cifs_mkdir, | |
634 | .rmdir = cifs_rmdir, | |
635 | .rename = cifs_rename, | |
636 | .permission = cifs_permission, | |
637 | /* revalidate:cifs_revalidate, */ | |
638 | .setattr = cifs_setattr, | |
639 | .symlink = cifs_symlink, | |
640 | .mknod = cifs_mknod, | |
641 | #ifdef CONFIG_CIFS_XATTR | |
642 | .setxattr = cifs_setxattr, | |
643 | .getxattr = cifs_getxattr, | |
644 | .listxattr = cifs_listxattr, | |
645 | .removexattr = cifs_removexattr, | |
646 | #endif | |
647 | }; | |
648 | ||
649 | const struct inode_operations cifs_file_inode_ops = { | |
650 | /* revalidate:cifs_revalidate, */ | |
651 | .setattr = cifs_setattr, | |
652 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
653 | .rename = cifs_rename, | |
654 | .permission = cifs_permission, | |
655 | #ifdef CONFIG_CIFS_XATTR | |
656 | .setxattr = cifs_setxattr, | |
657 | .getxattr = cifs_getxattr, | |
658 | .listxattr = cifs_listxattr, | |
659 | .removexattr = cifs_removexattr, | |
660 | #endif | |
661 | }; | |
662 | ||
663 | const struct inode_operations cifs_symlink_inode_ops = { | |
664 | .readlink = generic_readlink, | |
665 | .follow_link = cifs_follow_link, | |
666 | .put_link = cifs_put_link, | |
667 | .permission = cifs_permission, | |
668 | /* BB add the following two eventually */ | |
669 | /* revalidate: cifs_revalidate, | |
670 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
671 | #ifdef CONFIG_CIFS_XATTR | |
672 | .setxattr = cifs_setxattr, | |
673 | .getxattr = cifs_getxattr, | |
674 | .listxattr = cifs_listxattr, | |
675 | .removexattr = cifs_removexattr, | |
676 | #endif | |
677 | }; | |
678 | ||
679 | const struct file_operations cifs_file_ops = { | |
680 | .read = do_sync_read, | |
681 | .write = do_sync_write, | |
682 | .aio_read = generic_file_aio_read, | |
683 | .aio_write = cifs_file_aio_write, | |
684 | .open = cifs_open, | |
685 | .release = cifs_close, | |
686 | .lock = cifs_lock, | |
687 | .fsync = cifs_fsync, | |
688 | .flush = cifs_flush, | |
689 | .mmap = cifs_file_mmap, | |
690 | .splice_read = generic_file_splice_read, | |
691 | .llseek = cifs_llseek, | |
692 | #ifdef CONFIG_CIFS_POSIX | |
693 | .unlocked_ioctl = cifs_ioctl, | |
694 | #endif /* CONFIG_CIFS_POSIX */ | |
695 | ||
696 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
697 | .dir_notify = cifs_dir_notify, | |
698 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
699 | }; | |
700 | ||
701 | const struct file_operations cifs_file_direct_ops = { | |
702 | /* no mmap, no aio, no readv - | |
703 | BB reevaluate whether they can be done with directio, no cache */ | |
704 | .read = cifs_user_read, | |
705 | .write = cifs_user_write, | |
706 | .open = cifs_open, | |
707 | .release = cifs_close, | |
708 | .lock = cifs_lock, | |
709 | .fsync = cifs_fsync, | |
710 | .flush = cifs_flush, | |
711 | .splice_read = generic_file_splice_read, | |
712 | #ifdef CONFIG_CIFS_POSIX | |
713 | .unlocked_ioctl = cifs_ioctl, | |
714 | #endif /* CONFIG_CIFS_POSIX */ | |
715 | .llseek = cifs_llseek, | |
716 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
717 | .dir_notify = cifs_dir_notify, | |
718 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
719 | }; | |
720 | const struct file_operations cifs_file_nobrl_ops = { | |
721 | .read = do_sync_read, | |
722 | .write = do_sync_write, | |
723 | .aio_read = generic_file_aio_read, | |
724 | .aio_write = cifs_file_aio_write, | |
725 | .open = cifs_open, | |
726 | .release = cifs_close, | |
727 | .fsync = cifs_fsync, | |
728 | .flush = cifs_flush, | |
729 | .mmap = cifs_file_mmap, | |
730 | .splice_read = generic_file_splice_read, | |
731 | .llseek = cifs_llseek, | |
732 | #ifdef CONFIG_CIFS_POSIX | |
733 | .unlocked_ioctl = cifs_ioctl, | |
734 | #endif /* CONFIG_CIFS_POSIX */ | |
735 | ||
736 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
737 | .dir_notify = cifs_dir_notify, | |
738 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
739 | }; | |
740 | ||
741 | const struct file_operations cifs_file_direct_nobrl_ops = { | |
742 | /* no mmap, no aio, no readv - | |
743 | BB reevaluate whether they can be done with directio, no cache */ | |
744 | .read = cifs_user_read, | |
745 | .write = cifs_user_write, | |
746 | .open = cifs_open, | |
747 | .release = cifs_close, | |
748 | .fsync = cifs_fsync, | |
749 | .flush = cifs_flush, | |
750 | .splice_read = generic_file_splice_read, | |
751 | #ifdef CONFIG_CIFS_POSIX | |
752 | .unlocked_ioctl = cifs_ioctl, | |
753 | #endif /* CONFIG_CIFS_POSIX */ | |
754 | .llseek = cifs_llseek, | |
755 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
756 | .dir_notify = cifs_dir_notify, | |
757 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
758 | }; | |
759 | ||
760 | const struct file_operations cifs_dir_ops = { | |
761 | .readdir = cifs_readdir, | |
762 | .release = cifs_closedir, | |
763 | .read = generic_read_dir, | |
764 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
765 | .dir_notify = cifs_dir_notify, | |
766 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
767 | .unlocked_ioctl = cifs_ioctl, | |
768 | }; | |
769 | ||
770 | static void | |
771 | cifs_init_once(void *inode) | |
772 | { | |
773 | struct cifsInodeInfo *cifsi = inode; | |
774 | ||
775 | inode_init_once(&cifsi->vfs_inode); | |
776 | INIT_LIST_HEAD(&cifsi->lockList); | |
777 | } | |
778 | ||
779 | static int | |
780 | cifs_init_inodecache(void) | |
781 | { | |
782 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
783 | sizeof(struct cifsInodeInfo), | |
784 | 0, (SLAB_RECLAIM_ACCOUNT| | |
785 | SLAB_MEM_SPREAD), | |
786 | cifs_init_once); | |
787 | if (cifs_inode_cachep == NULL) | |
788 | return -ENOMEM; | |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
793 | static void | |
794 | cifs_destroy_inodecache(void) | |
795 | { | |
796 | kmem_cache_destroy(cifs_inode_cachep); | |
797 | } | |
798 | ||
799 | static int | |
800 | cifs_init_request_bufs(void) | |
801 | { | |
802 | if (CIFSMaxBufSize < 8192) { | |
803 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum | |
804 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
805 | CIFSMaxBufSize = 8192; | |
806 | } else if (CIFSMaxBufSize > 1024*127) { | |
807 | CIFSMaxBufSize = 1024 * 127; | |
808 | } else { | |
809 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
810 | } | |
811 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
812 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
813 | CIFSMaxBufSize + | |
814 | MAX_CIFS_HDR_SIZE, 0, | |
815 | SLAB_HWCACHE_ALIGN, NULL); | |
816 | if (cifs_req_cachep == NULL) | |
817 | return -ENOMEM; | |
818 | ||
819 | if (cifs_min_rcv < 1) | |
820 | cifs_min_rcv = 1; | |
821 | else if (cifs_min_rcv > 64) { | |
822 | cifs_min_rcv = 64; | |
823 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); | |
824 | } | |
825 | ||
826 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, | |
827 | cifs_req_cachep); | |
828 | ||
829 | if (cifs_req_poolp == NULL) { | |
830 | kmem_cache_destroy(cifs_req_cachep); | |
831 | return -ENOMEM; | |
832 | } | |
833 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and | |
834 | almost all handle based requests (but not write response, nor is it | |
835 | sufficient for path based requests). A smaller size would have | |
836 | been more efficient (compacting multiple slab items on one 4k page) | |
837 | for the case in which debug was on, but this larger size allows | |
838 | more SMBs to use small buffer alloc and is still much more | |
839 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
840 | alloc of large cifs buffers even when page debugging is on */ | |
841 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
842 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
843 | NULL); | |
844 | if (cifs_sm_req_cachep == NULL) { | |
845 | mempool_destroy(cifs_req_poolp); | |
846 | kmem_cache_destroy(cifs_req_cachep); | |
847 | return -ENOMEM; | |
848 | } | |
849 | ||
850 | if (cifs_min_small < 2) | |
851 | cifs_min_small = 2; | |
852 | else if (cifs_min_small > 256) { | |
853 | cifs_min_small = 256; | |
854 | cFYI(1, ("cifs_min_small set to maximum (256)")); | |
855 | } | |
856 | ||
857 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, | |
858 | cifs_sm_req_cachep); | |
859 | ||
860 | if (cifs_sm_req_poolp == NULL) { | |
861 | mempool_destroy(cifs_req_poolp); | |
862 | kmem_cache_destroy(cifs_req_cachep); | |
863 | kmem_cache_destroy(cifs_sm_req_cachep); | |
864 | return -ENOMEM; | |
865 | } | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
870 | static void | |
871 | cifs_destroy_request_bufs(void) | |
872 | { | |
873 | mempool_destroy(cifs_req_poolp); | |
874 | kmem_cache_destroy(cifs_req_cachep); | |
875 | mempool_destroy(cifs_sm_req_poolp); | |
876 | kmem_cache_destroy(cifs_sm_req_cachep); | |
877 | } | |
878 | ||
879 | static int | |
880 | cifs_init_mids(void) | |
881 | { | |
882 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
883 | sizeof(struct mid_q_entry), 0, | |
884 | SLAB_HWCACHE_ALIGN, NULL); | |
885 | if (cifs_mid_cachep == NULL) | |
886 | return -ENOMEM; | |
887 | ||
888 | /* 3 is a reasonable minimum number of simultaneous operations */ | |
889 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
890 | if (cifs_mid_poolp == NULL) { | |
891 | kmem_cache_destroy(cifs_mid_cachep); | |
892 | return -ENOMEM; | |
893 | } | |
894 | ||
895 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
896 | sizeof(struct oplock_q_entry), 0, | |
897 | SLAB_HWCACHE_ALIGN, NULL); | |
898 | if (cifs_oplock_cachep == NULL) { | |
899 | mempool_destroy(cifs_mid_poolp); | |
900 | kmem_cache_destroy(cifs_mid_cachep); | |
901 | return -ENOMEM; | |
902 | } | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | static void | |
908 | cifs_destroy_mids(void) | |
909 | { | |
910 | mempool_destroy(cifs_mid_poolp); | |
911 | kmem_cache_destroy(cifs_mid_cachep); | |
912 | kmem_cache_destroy(cifs_oplock_cachep); | |
913 | } | |
914 | ||
915 | static int cifs_oplock_thread(void *dummyarg) | |
916 | { | |
917 | struct oplock_q_entry *oplock_item; | |
918 | struct cifsTconInfo *pTcon; | |
919 | struct inode *inode; | |
920 | __u16 netfid; | |
921 | int rc, waitrc = 0; | |
922 | ||
923 | set_freezable(); | |
924 | do { | |
925 | if (try_to_freeze()) | |
926 | continue; | |
927 | ||
928 | spin_lock(&GlobalMid_Lock); | |
929 | if (list_empty(&GlobalOplock_Q)) { | |
930 | spin_unlock(&GlobalMid_Lock); | |
931 | set_current_state(TASK_INTERRUPTIBLE); | |
932 | schedule_timeout(39*HZ); | |
933 | } else { | |
934 | oplock_item = list_entry(GlobalOplock_Q.next, | |
935 | struct oplock_q_entry, qhead); | |
936 | cFYI(1, ("found oplock item to write out")); | |
937 | pTcon = oplock_item->tcon; | |
938 | inode = oplock_item->pinode; | |
939 | netfid = oplock_item->netfid; | |
940 | spin_unlock(&GlobalMid_Lock); | |
941 | DeleteOplockQEntry(oplock_item); | |
942 | /* can not grab inode sem here since it would | |
943 | deadlock when oplock received on delete | |
944 | since vfs_unlink holds the i_mutex across | |
945 | the call */ | |
946 | /* mutex_lock(&inode->i_mutex);*/ | |
947 | if (S_ISREG(inode->i_mode)) { | |
948 | rc = filemap_fdatawrite(inode->i_mapping); | |
949 | if (CIFS_I(inode)->clientCanCacheRead == 0) { | |
950 | waitrc = filemap_fdatawait( | |
951 | inode->i_mapping); | |
952 | invalidate_remote_inode(inode); | |
953 | } | |
954 | if (rc == 0) | |
955 | rc = waitrc; | |
956 | } else | |
957 | rc = 0; | |
958 | /* mutex_unlock(&inode->i_mutex);*/ | |
959 | if (rc) | |
960 | CIFS_I(inode)->write_behind_rc = rc; | |
961 | cFYI(1, ("Oplock flush inode %p rc %d", | |
962 | inode, rc)); | |
963 | ||
964 | /* releasing stale oplock after recent reconnect | |
965 | of smb session using a now incorrect file | |
966 | handle is not a data integrity issue but do | |
967 | not bother sending an oplock release if session | |
968 | to server still is disconnected since oplock | |
969 | already released by the server in that case */ | |
970 | if (pTcon->tidStatus != CifsNeedReconnect) { | |
971 | rc = CIFSSMBLock(0, pTcon, netfid, | |
972 | 0 /* len */ , 0 /* offset */, 0, | |
973 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
974 | false /* wait flag */); | |
975 | cFYI(1, ("Oplock release rc = %d", rc)); | |
976 | } | |
977 | set_current_state(TASK_INTERRUPTIBLE); | |
978 | schedule_timeout(1); /* yield in case q were corrupt */ | |
979 | } | |
980 | } while (!kthread_should_stop()); | |
981 | ||
982 | return 0; | |
983 | } | |
984 | ||
985 | static int cifs_dnotify_thread(void *dummyarg) | |
986 | { | |
987 | struct list_head *tmp; | |
988 | struct cifsSesInfo *ses; | |
989 | ||
990 | do { | |
991 | if (try_to_freeze()) | |
992 | continue; | |
993 | set_current_state(TASK_INTERRUPTIBLE); | |
994 | schedule_timeout(15*HZ); | |
995 | read_lock(&GlobalSMBSeslock); | |
996 | /* check if any stuck requests that need | |
997 | to be woken up and wakeq so the | |
998 | thread can wake up and error out */ | |
999 | list_for_each(tmp, &GlobalSMBSessionList) { | |
1000 | ses = list_entry(tmp, struct cifsSesInfo, | |
1001 | cifsSessionList); | |
1002 | if (ses->server && atomic_read(&ses->server->inFlight)) | |
1003 | wake_up_all(&ses->server->response_q); | |
1004 | } | |
1005 | read_unlock(&GlobalSMBSeslock); | |
1006 | } while (!kthread_should_stop()); | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | static int __init | |
1012 | init_cifs(void) | |
1013 | { | |
1014 | int rc = 0; | |
1015 | cifs_proc_init(); | |
1016 | /* INIT_LIST_HEAD(&GlobalServerList);*/ /* BB not implemented yet */ | |
1017 | INIT_LIST_HEAD(&GlobalSMBSessionList); | |
1018 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
1019 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
1020 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
1021 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
1022 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
1023 | #endif | |
1024 | /* | |
1025 | * Initialize Global counters | |
1026 | */ | |
1027 | atomic_set(&sesInfoAllocCount, 0); | |
1028 | atomic_set(&tconInfoAllocCount, 0); | |
1029 | atomic_set(&tcpSesAllocCount, 0); | |
1030 | atomic_set(&tcpSesReconnectCount, 0); | |
1031 | atomic_set(&tconInfoReconnectCount, 0); | |
1032 | ||
1033 | atomic_set(&bufAllocCount, 0); | |
1034 | atomic_set(&smBufAllocCount, 0); | |
1035 | #ifdef CONFIG_CIFS_STATS2 | |
1036 | atomic_set(&totBufAllocCount, 0); | |
1037 | atomic_set(&totSmBufAllocCount, 0); | |
1038 | #endif /* CONFIG_CIFS_STATS2 */ | |
1039 | ||
1040 | atomic_set(&midCount, 0); | |
1041 | GlobalCurrentXid = 0; | |
1042 | GlobalTotalActiveXid = 0; | |
1043 | GlobalMaxActiveXid = 0; | |
1044 | memset(Local_System_Name, 0, 15); | |
1045 | rwlock_init(&GlobalSMBSeslock); | |
1046 | spin_lock_init(&GlobalMid_Lock); | |
1047 | ||
1048 | if (cifs_max_pending < 2) { | |
1049 | cifs_max_pending = 2; | |
1050 | cFYI(1, ("cifs_max_pending set to min of 2")); | |
1051 | } else if (cifs_max_pending > 256) { | |
1052 | cifs_max_pending = 256; | |
1053 | cFYI(1, ("cifs_max_pending set to max of 256")); | |
1054 | } | |
1055 | ||
1056 | rc = cifs_init_inodecache(); | |
1057 | if (rc) | |
1058 | goto out_clean_proc; | |
1059 | ||
1060 | rc = cifs_init_mids(); | |
1061 | if (rc) | |
1062 | goto out_destroy_inodecache; | |
1063 | ||
1064 | rc = cifs_init_request_bufs(); | |
1065 | if (rc) | |
1066 | goto out_destroy_mids; | |
1067 | ||
1068 | rc = register_filesystem(&cifs_fs_type); | |
1069 | if (rc) | |
1070 | goto out_destroy_request_bufs; | |
1071 | #ifdef CONFIG_CIFS_UPCALL | |
1072 | rc = register_key_type(&cifs_spnego_key_type); | |
1073 | if (rc) | |
1074 | goto out_unregister_filesystem; | |
1075 | #endif | |
1076 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1077 | rc = register_key_type(&key_type_dns_resolver); | |
1078 | if (rc) | |
1079 | goto out_unregister_key_type; | |
1080 | #endif | |
1081 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); | |
1082 | if (IS_ERR(oplockThread)) { | |
1083 | rc = PTR_ERR(oplockThread); | |
1084 | cERROR(1, ("error %d create oplock thread", rc)); | |
1085 | goto out_unregister_dfs_key_type; | |
1086 | } | |
1087 | ||
1088 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1089 | if (IS_ERR(dnotifyThread)) { | |
1090 | rc = PTR_ERR(dnotifyThread); | |
1091 | cERROR(1, ("error %d create dnotify thread", rc)); | |
1092 | goto out_stop_oplock_thread; | |
1093 | } | |
1094 | ||
1095 | return 0; | |
1096 | ||
1097 | out_stop_oplock_thread: | |
1098 | kthread_stop(oplockThread); | |
1099 | out_unregister_dfs_key_type: | |
1100 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1101 | unregister_key_type(&key_type_dns_resolver); | |
1102 | out_unregister_key_type: | |
1103 | #endif | |
1104 | #ifdef CONFIG_CIFS_UPCALL | |
1105 | unregister_key_type(&cifs_spnego_key_type); | |
1106 | out_unregister_filesystem: | |
1107 | #endif | |
1108 | unregister_filesystem(&cifs_fs_type); | |
1109 | out_destroy_request_bufs: | |
1110 | cifs_destroy_request_bufs(); | |
1111 | out_destroy_mids: | |
1112 | cifs_destroy_mids(); | |
1113 | out_destroy_inodecache: | |
1114 | cifs_destroy_inodecache(); | |
1115 | out_clean_proc: | |
1116 | cifs_proc_clean(); | |
1117 | return rc; | |
1118 | } | |
1119 | ||
1120 | static void __exit | |
1121 | exit_cifs(void) | |
1122 | { | |
1123 | cFYI(DBG2, ("exit_cifs")); | |
1124 | cifs_proc_clean(); | |
1125 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1126 | cifs_dfs_release_automount_timer(); | |
1127 | unregister_key_type(&key_type_dns_resolver); | |
1128 | #endif | |
1129 | #ifdef CONFIG_CIFS_UPCALL | |
1130 | unregister_key_type(&cifs_spnego_key_type); | |
1131 | #endif | |
1132 | unregister_filesystem(&cifs_fs_type); | |
1133 | cifs_destroy_inodecache(); | |
1134 | cifs_destroy_mids(); | |
1135 | cifs_destroy_request_bufs(); | |
1136 | kthread_stop(oplockThread); | |
1137 | kthread_stop(dnotifyThread); | |
1138 | } | |
1139 | ||
1140 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
1141 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ | |
1142 | MODULE_DESCRIPTION | |
1143 | ("VFS to access servers complying with the SNIA CIFS Specification " | |
1144 | "e.g. Samba and Windows"); | |
1145 | MODULE_VERSION(CIFS_VERSION); | |
1146 | module_init(init_cifs) | |
1147 | module_exit(exit_cifs) |