Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2002,2004 | |
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 "cifsfs.h" | |
36 | #include "cifspdu.h" | |
37 | #define DECLARE_GLOBALS_HERE | |
38 | #include "cifsglob.h" | |
39 | #include "cifsproto.h" | |
40 | #include "cifs_debug.h" | |
41 | #include "cifs_fs_sb.h" | |
42 | #include <linux/mm.h> | |
43 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ | |
44 | ||
45 | #ifdef CONFIG_CIFS_QUOTA | |
46 | static struct quotactl_ops cifs_quotactl_ops; | |
47 | #endif | |
48 | ||
49 | int cifsFYI = 0; | |
50 | int cifsERROR = 1; | |
51 | int traceSMB = 0; | |
52 | unsigned int oplockEnabled = 1; | |
53 | unsigned int experimEnabled = 0; | |
54 | unsigned int linuxExtEnabled = 1; | |
55 | unsigned int lookupCacheEnabled = 1; | |
56 | unsigned int multiuser_mount = 0; | |
57 | unsigned int extended_security = 0; | |
58 | unsigned int ntlmv2_support = 0; | |
59 | unsigned int sign_CIFS_PDUs = 1; | |
60 | extern struct task_struct * oplockThread; /* remove sparse warning */ | |
61 | struct task_struct * oplockThread = NULL; | |
8d0d5094 SF |
62 | extern struct task_struct * dnotifyThread; /* remove sparse warning */ |
63 | struct task_struct * dnotifyThread = NULL; | |
1da177e4 LT |
64 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
65 | module_param(CIFSMaxBufSize, int, 0); | |
66 | MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048"); | |
67 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; | |
68 | module_param(cifs_min_rcv, int, 0); | |
69 | MODULE_PARM_DESC(cifs_min_rcv,"Network buffers in pool. Default: 4 Range: 1 to 64"); | |
70 | unsigned int cifs_min_small = 30; | |
71 | module_param(cifs_min_small, int, 0); | |
72 | MODULE_PARM_DESC(cifs_min_small,"Small network buffers in pool. Default: 30 Range: 2 to 256"); | |
73 | unsigned int cifs_max_pending = CIFS_MAX_REQ; | |
74 | module_param(cifs_max_pending, int, 0); | |
75 | MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256"); | |
76 | ||
77 | static DECLARE_COMPLETION(cifs_oplock_exited); | |
8d0d5094 | 78 | static DECLARE_COMPLETION(cifs_dnotify_exited); |
1da177e4 LT |
79 | |
80 | extern mempool_t *cifs_sm_req_poolp; | |
81 | extern mempool_t *cifs_req_poolp; | |
82 | extern mempool_t *cifs_mid_poolp; | |
83 | ||
84 | extern kmem_cache_t *cifs_oplock_cachep; | |
85 | ||
86 | static int | |
87 | cifs_read_super(struct super_block *sb, void *data, | |
88 | const char *devname, int silent) | |
89 | { | |
90 | struct inode *inode; | |
91 | struct cifs_sb_info *cifs_sb; | |
92 | int rc = 0; | |
93 | ||
94 | sb->s_flags |= MS_NODIRATIME; /* and probably even noatime */ | |
95 | sb->s_fs_info = kmalloc(sizeof(struct cifs_sb_info),GFP_KERNEL); | |
96 | cifs_sb = CIFS_SB(sb); | |
97 | if(cifs_sb == NULL) | |
98 | return -ENOMEM; | |
99 | else | |
100 | memset(cifs_sb,0,sizeof(struct cifs_sb_info)); | |
101 | ||
102 | ||
103 | rc = cifs_mount(sb, cifs_sb, data, devname); | |
104 | ||
105 | if (rc) { | |
106 | if (!silent) | |
107 | cERROR(1, | |
108 | ("cifs_mount failed w/return code = %d", rc)); | |
109 | goto out_mount_failed; | |
110 | } | |
111 | ||
112 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
113 | sb->s_op = &cifs_super_ops; | |
114 | /* if(cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) | |
115 | sb->s_blocksize = cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
116 | #ifdef CONFIG_CIFS_QUOTA | |
117 | sb->s_qcop = &cifs_quotactl_ops; | |
118 | #endif | |
119 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
120 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
121 | inode = iget(sb, ROOT_I); | |
122 | ||
123 | if (!inode) { | |
124 | rc = -ENOMEM; | |
125 | goto out_no_root; | |
126 | } | |
127 | ||
128 | sb->s_root = d_alloc_root(inode); | |
129 | ||
130 | if (!sb->s_root) { | |
131 | rc = -ENOMEM; | |
132 | goto out_no_root; | |
133 | } | |
134 | ||
135 | return 0; | |
136 | ||
137 | out_no_root: | |
138 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
139 | if (inode) | |
140 | iput(inode); | |
141 | ||
142 | out_mount_failed: | |
143 | if(cifs_sb) { | |
144 | if(cifs_sb->local_nls) | |
145 | unload_nls(cifs_sb->local_nls); | |
146 | kfree(cifs_sb); | |
147 | } | |
148 | return rc; | |
149 | } | |
150 | ||
151 | static void | |
152 | cifs_put_super(struct super_block *sb) | |
153 | { | |
154 | int rc = 0; | |
155 | struct cifs_sb_info *cifs_sb; | |
156 | ||
157 | cFYI(1, ("In cifs_put_super")); | |
158 | cifs_sb = CIFS_SB(sb); | |
159 | if(cifs_sb == NULL) { | |
160 | cFYI(1,("Empty cifs superblock info passed to unmount")); | |
161 | return; | |
162 | } | |
163 | rc = cifs_umount(sb, cifs_sb); | |
164 | if (rc) { | |
165 | cERROR(1, ("cifs_umount failed with return code %d", rc)); | |
166 | } | |
167 | unload_nls(cifs_sb->local_nls); | |
168 | kfree(cifs_sb); | |
169 | return; | |
170 | } | |
171 | ||
172 | static int | |
173 | cifs_statfs(struct super_block *sb, struct kstatfs *buf) | |
174 | { | |
c81156dd SF |
175 | int xid; |
176 | int rc = -EOPNOTSUPP; | |
1da177e4 LT |
177 | struct cifs_sb_info *cifs_sb; |
178 | struct cifsTconInfo *pTcon; | |
179 | ||
180 | xid = GetXid(); | |
181 | ||
182 | cifs_sb = CIFS_SB(sb); | |
183 | pTcon = cifs_sb->tcon; | |
184 | ||
185 | buf->f_type = CIFS_MAGIC_NUMBER; | |
186 | ||
187 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ | |
c81156dd SF |
188 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
189 | presumably be total path, but note | |
190 | that some servers (includinng Samba 3) | |
191 | have a shorter maximum path */ | |
1da177e4 LT |
192 | buf->f_files = 0; /* undefined */ |
193 | buf->f_ffree = 0; /* unlimited */ | |
194 | ||
195 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
196 | /* BB we could add a second check for a QFS Unix capability bit */ | |
f28ac91b | 197 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
c81156dd SF |
198 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
199 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) | |
737b758c | 200 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
1da177e4 LT |
201 | |
202 | /* Only need to call the old QFSInfo if failed | |
203 | on newer one */ | |
204 | if(rc) | |
205 | #endif /* CIFS_EXPERIMENTAL */ | |
737b758c | 206 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); |
1da177e4 | 207 | |
20962438 SF |
208 | /* Old Windows servers do not support level 103, retry with level |
209 | one if old server failed the previous call */ | |
210 | if(rc) | |
211 | rc = SMBOldQFSInfo(xid, pTcon, buf); | |
1da177e4 LT |
212 | /* |
213 | int f_type; | |
214 | __fsid_t f_fsid; | |
215 | int f_namelen; */ | |
c81156dd | 216 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
1da177e4 | 217 | FreeXid(xid); |
c81156dd SF |
218 | return 0; /* always return success? what if volume is no |
219 | longer available? */ | |
1da177e4 LT |
220 | } |
221 | ||
222 | static int cifs_permission(struct inode * inode, int mask, struct nameidata *nd) | |
223 | { | |
224 | struct cifs_sb_info *cifs_sb; | |
225 | ||
226 | cifs_sb = CIFS_SB(inode->i_sb); | |
227 | ||
228 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { | |
229 | return 0; | |
230 | } else /* file mode might have been restricted at mount time | |
231 | on the client (above and beyond ACL on servers) for | |
232 | servers which do not support setting and viewing mode bits, | |
233 | so allowing client to check permissions is useful */ | |
234 | return generic_permission(inode, mask, NULL); | |
235 | } | |
236 | ||
237 | static kmem_cache_t *cifs_inode_cachep; | |
238 | static kmem_cache_t *cifs_req_cachep; | |
239 | static kmem_cache_t *cifs_mid_cachep; | |
240 | kmem_cache_t *cifs_oplock_cachep; | |
241 | static kmem_cache_t *cifs_sm_req_cachep; | |
242 | mempool_t *cifs_sm_req_poolp; | |
243 | mempool_t *cifs_req_poolp; | |
244 | mempool_t *cifs_mid_poolp; | |
245 | ||
246 | static struct inode * | |
247 | cifs_alloc_inode(struct super_block *sb) | |
248 | { | |
249 | struct cifsInodeInfo *cifs_inode; | |
250 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, SLAB_KERNEL); | |
251 | if (!cifs_inode) | |
252 | return NULL; | |
253 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
254 | atomic_set(&cifs_inode->inUse, 0); | |
255 | cifs_inode->time = 0; | |
256 | /* Until the file is open and we have gotten oplock | |
257 | info back from the server, can not assume caching of | |
258 | file data or metadata */ | |
259 | cifs_inode->clientCanCacheRead = FALSE; | |
260 | cifs_inode->clientCanCacheAll = FALSE; | |
261 | cifs_inode->vfs_inode.i_blksize = CIFS_MAX_MSGSIZE; | |
262 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ | |
e30dcf3a | 263 | cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; |
1da177e4 LT |
264 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
265 | return &cifs_inode->vfs_inode; | |
266 | } | |
267 | ||
268 | static void | |
269 | cifs_destroy_inode(struct inode *inode) | |
270 | { | |
271 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
272 | } | |
273 | ||
274 | /* | |
275 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
276 | * Not all settable options are displayed but most of the important | |
277 | * ones are. | |
278 | */ | |
279 | static int | |
280 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
281 | { | |
282 | struct cifs_sb_info *cifs_sb; | |
283 | ||
284 | cifs_sb = CIFS_SB(m->mnt_sb); | |
285 | ||
286 | if (cifs_sb) { | |
287 | if (cifs_sb->tcon) { | |
288 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); | |
289 | if (cifs_sb->tcon->ses) { | |
290 | if (cifs_sb->tcon->ses->userName) | |
291 | seq_printf(s, ",username=%s", | |
292 | cifs_sb->tcon->ses->userName); | |
293 | if(cifs_sb->tcon->ses->domainName) | |
294 | seq_printf(s, ",domain=%s", | |
295 | cifs_sb->tcon->ses->domainName); | |
296 | } | |
297 | } | |
298 | seq_printf(s, ",rsize=%d",cifs_sb->rsize); | |
299 | seq_printf(s, ",wsize=%d",cifs_sb->wsize); | |
300 | } | |
301 | return 0; | |
302 | } | |
303 | ||
304 | #ifdef CONFIG_CIFS_QUOTA | |
305 | int cifs_xquota_set(struct super_block * sb, int quota_type, qid_t qid, | |
306 | struct fs_disk_quota * pdquota) | |
307 | { | |
308 | int xid; | |
309 | int rc = 0; | |
310 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
311 | struct cifsTconInfo *pTcon; | |
312 | ||
313 | if(cifs_sb) | |
314 | pTcon = cifs_sb->tcon; | |
315 | else | |
316 | return -EIO; | |
317 | ||
318 | ||
319 | xid = GetXid(); | |
320 | if(pTcon) { | |
321 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
322 | } else { | |
323 | return -EIO; | |
324 | } | |
325 | ||
326 | FreeXid(xid); | |
327 | return rc; | |
328 | } | |
329 | ||
330 | int cifs_xquota_get(struct super_block * sb, int quota_type, qid_t qid, | |
331 | struct fs_disk_quota * pdquota) | |
332 | { | |
333 | int xid; | |
334 | int rc = 0; | |
335 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
336 | struct cifsTconInfo *pTcon; | |
337 | ||
338 | if(cifs_sb) | |
339 | pTcon = cifs_sb->tcon; | |
340 | else | |
341 | return -EIO; | |
342 | ||
343 | xid = GetXid(); | |
344 | if(pTcon) { | |
345 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); | |
346 | } else { | |
347 | rc = -EIO; | |
348 | } | |
349 | ||
350 | FreeXid(xid); | |
351 | return rc; | |
352 | } | |
353 | ||
354 | int cifs_xstate_set(struct super_block * sb, unsigned int flags, int operation) | |
355 | { | |
356 | int xid; | |
357 | int rc = 0; | |
358 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
359 | struct cifsTconInfo *pTcon; | |
360 | ||
361 | if(cifs_sb) | |
362 | pTcon = cifs_sb->tcon; | |
363 | else | |
364 | return -EIO; | |
365 | ||
366 | xid = GetXid(); | |
367 | if(pTcon) { | |
368 | cFYI(1,("flags: 0x%x operation: 0x%x",flags,operation)); | |
369 | } else { | |
370 | rc = -EIO; | |
371 | } | |
372 | ||
373 | FreeXid(xid); | |
374 | return rc; | |
375 | } | |
376 | ||
377 | int cifs_xstate_get(struct super_block * sb, struct fs_quota_stat *qstats) | |
378 | { | |
379 | int xid; | |
380 | int rc = 0; | |
381 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
382 | struct cifsTconInfo *pTcon; | |
383 | ||
384 | if(cifs_sb) { | |
385 | pTcon = cifs_sb->tcon; | |
386 | } else { | |
387 | return -EIO; | |
388 | } | |
389 | xid = GetXid(); | |
390 | if(pTcon) { | |
391 | cFYI(1,("pqstats %p",qstats)); | |
392 | } else { | |
393 | rc = -EIO; | |
394 | } | |
395 | ||
396 | FreeXid(xid); | |
397 | return rc; | |
398 | } | |
399 | ||
400 | static struct quotactl_ops cifs_quotactl_ops = { | |
401 | .set_xquota = cifs_xquota_set, | |
402 | .get_xquota = cifs_xquota_set, | |
403 | .set_xstate = cifs_xstate_set, | |
404 | .get_xstate = cifs_xstate_get, | |
405 | }; | |
406 | #endif | |
407 | ||
68058e75 SF |
408 | static void cifs_umount_begin(struct super_block * sblock) |
409 | { | |
5e1253b5 | 410 | struct cifs_sb_info *cifs_sb; |
68058e75 | 411 | |
5e1253b5 SF |
412 | cifs_sb = CIFS_SB(sb); |
413 | if(cifs_sb == NULL) | |
414 | return -EIO; | |
415 | if(cifs_sb->tcon == NULL) | |
416 | return -EIO; | |
417 | down(&tcon->tconSem); | |
418 | if (atomic_read(&tcon->useCount) == 1) | |
419 | tcon->tidStatus = CifsExiting; | |
420 | up(&tcon->tconSem); | |
421 | ||
422 | if((cifs->sb->tcon->ses) && (cifs_sb->tcon->ses->server)) | |
423 | { | |
424 | cERROR(1,("wake up tasks now - umount begin not complete")); | |
425 | wake_up_all(&server->request_q); | |
426 | } | |
427 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
428 | |
429 | return; | |
430 | } | |
431 | ||
432 | ||
1da177e4 LT |
433 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
434 | { | |
435 | *flags |= MS_NODIRATIME; | |
436 | return 0; | |
437 | } | |
438 | ||
439 | struct super_operations cifs_super_ops = { | |
440 | .read_inode = cifs_read_inode, | |
441 | .put_super = cifs_put_super, | |
442 | .statfs = cifs_statfs, | |
443 | .alloc_inode = cifs_alloc_inode, | |
444 | .destroy_inode = cifs_destroy_inode, | |
445 | /* .drop_inode = generic_delete_inode, | |
446 | .delete_inode = cifs_delete_inode, *//* Do not need the above two functions | |
447 | unless later we add lazy close of inodes or unless the kernel forgets to call | |
448 | us with the same number of releases (closes) as opens */ | |
449 | .show_options = cifs_show_options, | |
68058e75 | 450 | /* .umount_begin = cifs_umount_begin, */ /* BB finish in the future */ |
1da177e4 LT |
451 | .remount_fs = cifs_remount, |
452 | }; | |
453 | ||
454 | static struct super_block * | |
455 | cifs_get_sb(struct file_system_type *fs_type, | |
456 | int flags, const char *dev_name, void *data) | |
457 | { | |
458 | int rc; | |
459 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
460 | ||
461 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
462 | ||
463 | if (IS_ERR(sb)) | |
464 | return sb; | |
465 | ||
466 | sb->s_flags = flags; | |
467 | ||
468 | rc = cifs_read_super(sb, data, dev_name, flags & MS_VERBOSE ? 1 : 0); | |
469 | if (rc) { | |
470 | up_write(&sb->s_umount); | |
471 | deactivate_super(sb); | |
472 | return ERR_PTR(rc); | |
473 | } | |
474 | sb->s_flags |= MS_ACTIVE; | |
475 | return sb; | |
476 | } | |
477 | ||
478 | static ssize_t | |
479 | cifs_read_wrapper(struct file * file, char __user *read_data, size_t read_size, | |
480 | loff_t * poffset) | |
481 | { | |
482 | if(file->f_dentry == NULL) | |
483 | return -EIO; | |
484 | else if(file->f_dentry->d_inode == NULL) | |
485 | return -EIO; | |
486 | ||
487 | cFYI(1,("In read_wrapper size %zd at %lld",read_size,*poffset)); | |
488 | ||
489 | if(CIFS_I(file->f_dentry->d_inode)->clientCanCacheRead) { | |
490 | return generic_file_read(file,read_data,read_size,poffset); | |
491 | } else { | |
492 | /* BB do we need to lock inode from here until after invalidate? */ | |
493 | /* if(file->f_dentry->d_inode->i_mapping) { | |
494 | filemap_fdatawrite(file->f_dentry->d_inode->i_mapping); | |
495 | filemap_fdatawait(file->f_dentry->d_inode->i_mapping); | |
496 | }*/ | |
497 | /* cifs_revalidate(file->f_dentry);*/ /* BB fixme */ | |
498 | ||
499 | /* BB we should make timer configurable - perhaps | |
500 | by simply calling cifs_revalidate here */ | |
501 | /* invalidate_remote_inode(file->f_dentry->d_inode);*/ | |
502 | return generic_file_read(file,read_data,read_size,poffset); | |
503 | } | |
504 | } | |
505 | ||
506 | static ssize_t | |
507 | cifs_write_wrapper(struct file * file, const char __user *write_data, | |
508 | size_t write_size, loff_t * poffset) | |
509 | { | |
510 | ssize_t written; | |
511 | ||
512 | if(file->f_dentry == NULL) | |
513 | return -EIO; | |
514 | else if(file->f_dentry->d_inode == NULL) | |
515 | return -EIO; | |
516 | ||
517 | cFYI(1,("In write_wrapper size %zd at %lld",write_size,*poffset)); | |
518 | ||
519 | written = generic_file_write(file,write_data,write_size,poffset); | |
520 | if(!CIFS_I(file->f_dentry->d_inode)->clientCanCacheAll) { | |
521 | if(file->f_dentry->d_inode->i_mapping) { | |
522 | filemap_fdatawrite(file->f_dentry->d_inode->i_mapping); | |
523 | } | |
524 | } | |
525 | return written; | |
526 | } | |
527 | ||
528 | ||
529 | static struct file_system_type cifs_fs_type = { | |
530 | .owner = THIS_MODULE, | |
531 | .name = "cifs", | |
532 | .get_sb = cifs_get_sb, | |
533 | .kill_sb = kill_anon_super, | |
534 | /* .fs_flags */ | |
535 | }; | |
536 | struct inode_operations cifs_dir_inode_ops = { | |
537 | .create = cifs_create, | |
538 | .lookup = cifs_lookup, | |
539 | .getattr = cifs_getattr, | |
540 | .unlink = cifs_unlink, | |
541 | .link = cifs_hardlink, | |
542 | .mkdir = cifs_mkdir, | |
543 | .rmdir = cifs_rmdir, | |
544 | .rename = cifs_rename, | |
545 | .permission = cifs_permission, | |
546 | /* revalidate:cifs_revalidate, */ | |
547 | .setattr = cifs_setattr, | |
548 | .symlink = cifs_symlink, | |
549 | .mknod = cifs_mknod, | |
550 | #ifdef CONFIG_CIFS_XATTR | |
551 | .setxattr = cifs_setxattr, | |
552 | .getxattr = cifs_getxattr, | |
553 | .listxattr = cifs_listxattr, | |
554 | .removexattr = cifs_removexattr, | |
555 | #endif | |
556 | }; | |
557 | ||
558 | struct inode_operations cifs_file_inode_ops = { | |
559 | /* revalidate:cifs_revalidate, */ | |
560 | .setattr = cifs_setattr, | |
561 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
562 | .rename = cifs_rename, | |
563 | .permission = cifs_permission, | |
564 | #ifdef CONFIG_CIFS_XATTR | |
565 | .setxattr = cifs_setxattr, | |
566 | .getxattr = cifs_getxattr, | |
567 | .listxattr = cifs_listxattr, | |
568 | .removexattr = cifs_removexattr, | |
569 | #endif | |
570 | }; | |
571 | ||
572 | struct inode_operations cifs_symlink_inode_ops = { | |
573 | .readlink = generic_readlink, | |
574 | .follow_link = cifs_follow_link, | |
575 | .put_link = cifs_put_link, | |
576 | .permission = cifs_permission, | |
577 | /* BB add the following two eventually */ | |
578 | /* revalidate: cifs_revalidate, | |
579 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
580 | #ifdef CONFIG_CIFS_XATTR | |
581 | .setxattr = cifs_setxattr, | |
582 | .getxattr = cifs_getxattr, | |
583 | .listxattr = cifs_listxattr, | |
584 | .removexattr = cifs_removexattr, | |
585 | #endif | |
586 | }; | |
587 | ||
588 | struct file_operations cifs_file_ops = { | |
589 | .read = cifs_read_wrapper, | |
590 | .write = cifs_write_wrapper, | |
591 | .open = cifs_open, | |
592 | .release = cifs_close, | |
593 | .lock = cifs_lock, | |
594 | .fsync = cifs_fsync, | |
595 | .flush = cifs_flush, | |
596 | .mmap = cifs_file_mmap, | |
597 | .sendfile = generic_file_sendfile, | |
c67593a0 SF |
598 | #ifdef CONFIG_CIFS_POSIX |
599 | .ioctl = cifs_ioctl, | |
600 | #endif /* CONFIG_CIFS_POSIX */ | |
601 | ||
1da177e4 LT |
602 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
603 | .readv = generic_file_readv, | |
604 | .writev = generic_file_writev, | |
605 | .aio_read = generic_file_aio_read, | |
606 | .aio_write = generic_file_aio_write, | |
607 | .dir_notify = cifs_dir_notify, | |
608 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
609 | }; | |
610 | ||
611 | struct file_operations cifs_file_direct_ops = { | |
612 | /* no mmap, no aio, no readv - | |
613 | BB reevaluate whether they can be done with directio, no cache */ | |
614 | .read = cifs_user_read, | |
615 | .write = cifs_user_write, | |
616 | .open = cifs_open, | |
617 | .release = cifs_close, | |
618 | .lock = cifs_lock, | |
619 | .fsync = cifs_fsync, | |
620 | .flush = cifs_flush, | |
621 | .sendfile = generic_file_sendfile, /* BB removeme BB */ | |
c67593a0 SF |
622 | #ifdef CONFIG_CIFS_POSIX |
623 | .ioctl = cifs_ioctl, | |
624 | #endif /* CONFIG_CIFS_POSIX */ | |
625 | ||
1da177e4 LT |
626 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
627 | .dir_notify = cifs_dir_notify, | |
628 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
629 | }; | |
630 | ||
631 | struct file_operations cifs_dir_ops = { | |
632 | .readdir = cifs_readdir, | |
633 | .release = cifs_closedir, | |
634 | .read = generic_read_dir, | |
635 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
636 | .dir_notify = cifs_dir_notify, | |
637 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
f28ac91b | 638 | .ioctl = cifs_ioctl, |
1da177e4 LT |
639 | }; |
640 | ||
641 | static void | |
642 | cifs_init_once(void *inode, kmem_cache_t * cachep, unsigned long flags) | |
643 | { | |
644 | struct cifsInodeInfo *cifsi = inode; | |
645 | ||
646 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | |
647 | SLAB_CTOR_CONSTRUCTOR) { | |
648 | inode_init_once(&cifsi->vfs_inode); | |
649 | INIT_LIST_HEAD(&cifsi->lockList); | |
650 | } | |
651 | } | |
652 | ||
653 | static int | |
654 | cifs_init_inodecache(void) | |
655 | { | |
656 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
657 | sizeof (struct cifsInodeInfo), | |
658 | 0, SLAB_RECLAIM_ACCOUNT, | |
659 | cifs_init_once, NULL); | |
660 | if (cifs_inode_cachep == NULL) | |
661 | return -ENOMEM; | |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | static void | |
667 | cifs_destroy_inodecache(void) | |
668 | { | |
669 | if (kmem_cache_destroy(cifs_inode_cachep)) | |
670 | printk(KERN_WARNING "cifs_inode_cache: error freeing\n"); | |
671 | } | |
672 | ||
673 | static int | |
674 | cifs_init_request_bufs(void) | |
675 | { | |
676 | if(CIFSMaxBufSize < 8192) { | |
677 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum | |
678 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
679 | CIFSMaxBufSize = 8192; | |
680 | } else if (CIFSMaxBufSize > 1024*127) { | |
681 | CIFSMaxBufSize = 1024 * 127; | |
682 | } else { | |
683 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
684 | } | |
685 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
686 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
687 | CIFSMaxBufSize + | |
688 | MAX_CIFS_HDR_SIZE, 0, | |
689 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
690 | if (cifs_req_cachep == NULL) | |
691 | return -ENOMEM; | |
692 | ||
693 | if(cifs_min_rcv < 1) | |
694 | cifs_min_rcv = 1; | |
695 | else if (cifs_min_rcv > 64) { | |
696 | cifs_min_rcv = 64; | |
697 | cERROR(1,("cifs_min_rcv set to maximum (64)")); | |
698 | } | |
699 | ||
700 | cifs_req_poolp = mempool_create(cifs_min_rcv, | |
701 | mempool_alloc_slab, | |
702 | mempool_free_slab, | |
703 | cifs_req_cachep); | |
704 | ||
705 | if(cifs_req_poolp == NULL) { | |
706 | kmem_cache_destroy(cifs_req_cachep); | |
707 | return -ENOMEM; | |
708 | } | |
709 | /* 256 (MAX_CIFS_HDR_SIZE bytes is enough for most SMB responses and | |
710 | almost all handle based requests (but not write response, nor is it | |
711 | sufficient for path based requests). A smaller size would have | |
712 | been more efficient (compacting multiple slab items on one 4k page) | |
713 | for the case in which debug was on, but this larger size allows | |
714 | more SMBs to use small buffer alloc and is still much more | |
715 | efficient to alloc 1 per page off the slab compared to 17K (5page) | |
716 | alloc of large cifs buffers even when page debugging is on */ | |
717 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
718 | MAX_CIFS_HDR_SIZE, 0, SLAB_HWCACHE_ALIGN, NULL, NULL); | |
719 | if (cifs_sm_req_cachep == NULL) { | |
720 | mempool_destroy(cifs_req_poolp); | |
721 | kmem_cache_destroy(cifs_req_cachep); | |
722 | return -ENOMEM; | |
723 | } | |
724 | ||
725 | if(cifs_min_small < 2) | |
726 | cifs_min_small = 2; | |
727 | else if (cifs_min_small > 256) { | |
728 | cifs_min_small = 256; | |
729 | cFYI(1,("cifs_min_small set to maximum (256)")); | |
730 | } | |
731 | ||
732 | cifs_sm_req_poolp = mempool_create(cifs_min_small, | |
733 | mempool_alloc_slab, | |
734 | mempool_free_slab, | |
735 | cifs_sm_req_cachep); | |
736 | ||
737 | if(cifs_sm_req_poolp == NULL) { | |
738 | mempool_destroy(cifs_req_poolp); | |
739 | kmem_cache_destroy(cifs_req_cachep); | |
740 | kmem_cache_destroy(cifs_sm_req_cachep); | |
741 | return -ENOMEM; | |
742 | } | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | static void | |
748 | cifs_destroy_request_bufs(void) | |
749 | { | |
750 | mempool_destroy(cifs_req_poolp); | |
751 | if (kmem_cache_destroy(cifs_req_cachep)) | |
752 | printk(KERN_WARNING | |
753 | "cifs_destroy_request_cache: error not all structures were freed\n"); | |
754 | mempool_destroy(cifs_sm_req_poolp); | |
755 | if (kmem_cache_destroy(cifs_sm_req_cachep)) | |
756 | printk(KERN_WARNING | |
757 | "cifs_destroy_request_cache: cifs_small_rq free error\n"); | |
758 | } | |
759 | ||
760 | static int | |
761 | cifs_init_mids(void) | |
762 | { | |
763 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
764 | sizeof (struct mid_q_entry), 0, | |
765 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
766 | if (cifs_mid_cachep == NULL) | |
767 | return -ENOMEM; | |
768 | ||
769 | cifs_mid_poolp = mempool_create(3 /* a reasonable min simultan opers */, | |
770 | mempool_alloc_slab, | |
771 | mempool_free_slab, | |
772 | cifs_mid_cachep); | |
773 | if(cifs_mid_poolp == NULL) { | |
774 | kmem_cache_destroy(cifs_mid_cachep); | |
775 | return -ENOMEM; | |
776 | } | |
777 | ||
778 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
779 | sizeof (struct oplock_q_entry), 0, | |
780 | SLAB_HWCACHE_ALIGN, NULL, NULL); | |
781 | if (cifs_oplock_cachep == NULL) { | |
782 | kmem_cache_destroy(cifs_mid_cachep); | |
783 | mempool_destroy(cifs_mid_poolp); | |
784 | return -ENOMEM; | |
785 | } | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | static void | |
791 | cifs_destroy_mids(void) | |
792 | { | |
793 | mempool_destroy(cifs_mid_poolp); | |
794 | if (kmem_cache_destroy(cifs_mid_cachep)) | |
795 | printk(KERN_WARNING | |
796 | "cifs_destroy_mids: error not all structures were freed\n"); | |
797 | ||
798 | if (kmem_cache_destroy(cifs_oplock_cachep)) | |
799 | printk(KERN_WARNING | |
800 | "error not all oplock structures were freed\n"); | |
801 | } | |
802 | ||
803 | static int cifs_oplock_thread(void * dummyarg) | |
804 | { | |
805 | struct oplock_q_entry * oplock_item; | |
806 | struct cifsTconInfo *pTcon; | |
807 | struct inode * inode; | |
808 | __u16 netfid; | |
809 | int rc; | |
810 | ||
811 | daemonize("cifsoplockd"); | |
812 | allow_signal(SIGTERM); | |
813 | ||
814 | oplockThread = current; | |
815 | do { | |
16abbecd SF |
816 | if(try_to_freeze()) |
817 | continue; | |
1da177e4 | 818 | |
1da177e4 LT |
819 | spin_lock(&GlobalMid_Lock); |
820 | if(list_empty(&GlobalOplock_Q)) { | |
821 | spin_unlock(&GlobalMid_Lock); | |
822 | set_current_state(TASK_INTERRUPTIBLE); | |
823 | schedule_timeout(39*HZ); | |
824 | } else { | |
825 | oplock_item = list_entry(GlobalOplock_Q.next, | |
826 | struct oplock_q_entry, qhead); | |
827 | if(oplock_item) { | |
828 | cFYI(1,("found oplock item to write out")); | |
829 | pTcon = oplock_item->tcon; | |
830 | inode = oplock_item->pinode; | |
831 | netfid = oplock_item->netfid; | |
832 | spin_unlock(&GlobalMid_Lock); | |
833 | DeleteOplockQEntry(oplock_item); | |
834 | /* can not grab inode sem here since it would | |
835 | deadlock when oplock received on delete | |
836 | since vfs_unlink holds the i_sem across | |
837 | the call */ | |
838 | /* down(&inode->i_sem);*/ | |
839 | if (S_ISREG(inode->i_mode)) { | |
840 | rc = filemap_fdatawrite(inode->i_mapping); | |
841 | if(CIFS_I(inode)->clientCanCacheRead == 0) { | |
842 | filemap_fdatawait(inode->i_mapping); | |
843 | invalidate_remote_inode(inode); | |
844 | } | |
845 | } else | |
846 | rc = 0; | |
847 | /* up(&inode->i_sem);*/ | |
848 | if (rc) | |
849 | CIFS_I(inode)->write_behind_rc = rc; | |
850 | cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); | |
851 | ||
852 | /* releasing a stale oplock after recent reconnection | |
853 | of smb session using a now incorrect file | |
854 | handle is not a data integrity issue but do | |
855 | not bother sending an oplock release if session | |
856 | to server still is disconnected since oplock | |
857 | already released by the server in that case */ | |
858 | if(pTcon->tidStatus != CifsNeedReconnect) { | |
859 | rc = CIFSSMBLock(0, pTcon, netfid, | |
860 | 0 /* len */ , 0 /* offset */, 0, | |
861 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
862 | 0 /* wait flag */); | |
863 | cFYI(1,("Oplock release rc = %d ",rc)); | |
864 | } | |
865 | } else | |
866 | spin_unlock(&GlobalMid_Lock); | |
68058e75 SF |
867 | set_current_state(TASK_INTERRUPTIBLE); |
868 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 LT |
869 | } |
870 | } while(!signal_pending(current)); | |
57337e42 | 871 | oplockThread = NULL; |
f191401f | 872 | complete_and_exit (&cifs_oplock_exited, 0); |
1da177e4 LT |
873 | } |
874 | ||
8d0d5094 SF |
875 | static int cifs_dnotify_thread(void * dummyarg) |
876 | { | |
877 | daemonize("cifsdnotifyd"); | |
878 | allow_signal(SIGTERM); | |
879 | ||
880 | dnotifyThread = current; | |
881 | do { | |
16abbecd SF |
882 | if(try_to_freeze()) |
883 | continue; | |
8d0d5094 SF |
884 | set_current_state(TASK_INTERRUPTIBLE); |
885 | schedule_timeout(39*HZ); | |
886 | } while(!signal_pending(current)); | |
887 | complete_and_exit (&cifs_dnotify_exited, 0); | |
888 | } | |
889 | ||
1da177e4 LT |
890 | static int __init |
891 | init_cifs(void) | |
892 | { | |
893 | int rc = 0; | |
894 | #ifdef CONFIG_PROC_FS | |
895 | cifs_proc_init(); | |
896 | #endif | |
897 | INIT_LIST_HEAD(&GlobalServerList); /* BB not implemented yet */ | |
898 | INIT_LIST_HEAD(&GlobalSMBSessionList); | |
899 | INIT_LIST_HEAD(&GlobalTreeConnectionList); | |
900 | INIT_LIST_HEAD(&GlobalOplock_Q); | |
901 | /* | |
902 | * Initialize Global counters | |
903 | */ | |
904 | atomic_set(&sesInfoAllocCount, 0); | |
905 | atomic_set(&tconInfoAllocCount, 0); | |
906 | atomic_set(&tcpSesAllocCount,0); | |
907 | atomic_set(&tcpSesReconnectCount, 0); | |
908 | atomic_set(&tconInfoReconnectCount, 0); | |
909 | ||
910 | atomic_set(&bufAllocCount, 0); | |
911 | atomic_set(&midCount, 0); | |
912 | GlobalCurrentXid = 0; | |
913 | GlobalTotalActiveXid = 0; | |
914 | GlobalMaxActiveXid = 0; | |
915 | rwlock_init(&GlobalSMBSeslock); | |
916 | spin_lock_init(&GlobalMid_Lock); | |
917 | ||
918 | if(cifs_max_pending < 2) { | |
919 | cifs_max_pending = 2; | |
920 | cFYI(1,("cifs_max_pending set to min of 2")); | |
921 | } else if(cifs_max_pending > 256) { | |
922 | cifs_max_pending = 256; | |
923 | cFYI(1,("cifs_max_pending set to max of 256")); | |
924 | } | |
925 | ||
926 | rc = cifs_init_inodecache(); | |
927 | if (!rc) { | |
928 | rc = cifs_init_mids(); | |
929 | if (!rc) { | |
930 | rc = cifs_init_request_bufs(); | |
931 | if (!rc) { | |
932 | rc = register_filesystem(&cifs_fs_type); | |
933 | if (!rc) { | |
934 | rc = (int)kernel_thread(cifs_oplock_thread, NULL, | |
935 | CLONE_FS | CLONE_FILES | CLONE_VM); | |
8d0d5094 SF |
936 | if(rc > 0) { |
937 | rc = (int)kernel_thread(cifs_dnotify_thread, NULL, | |
938 | CLONE_FS | CLONE_FILES | CLONE_VM); | |
939 | if(rc > 0) | |
940 | return 0; | |
941 | else | |
942 | cERROR(1,("error %d create dnotify thread", rc)); | |
943 | } else { | |
1da177e4 | 944 | cERROR(1,("error %d create oplock thread",rc)); |
8d0d5094 | 945 | } |
1da177e4 LT |
946 | } |
947 | cifs_destroy_request_bufs(); | |
948 | } | |
949 | cifs_destroy_mids(); | |
950 | } | |
951 | cifs_destroy_inodecache(); | |
952 | } | |
953 | #ifdef CONFIG_PROC_FS | |
954 | cifs_proc_clean(); | |
955 | #endif | |
956 | return rc; | |
957 | } | |
958 | ||
959 | static void __exit | |
960 | exit_cifs(void) | |
961 | { | |
962 | cFYI(0, ("In unregister ie exit_cifs")); | |
963 | #ifdef CONFIG_PROC_FS | |
964 | cifs_proc_clean(); | |
965 | #endif | |
966 | unregister_filesystem(&cifs_fs_type); | |
967 | cifs_destroy_inodecache(); | |
968 | cifs_destroy_mids(); | |
969 | cifs_destroy_request_bufs(); | |
970 | if(oplockThread) { | |
971 | send_sig(SIGTERM, oplockThread, 1); | |
972 | wait_for_completion(&cifs_oplock_exited); | |
973 | } | |
8d0d5094 SF |
974 | if(dnotifyThread) { |
975 | send_sig(SIGTERM, dnotifyThread, 1); | |
976 | wait_for_completion(&cifs_dnotify_exited); | |
977 | } | |
1da177e4 LT |
978 | } |
979 | ||
980 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
981 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ | |
982 | MODULE_DESCRIPTION | |
983 | ("VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows"); | |
984 | MODULE_VERSION(CIFS_VERSION); | |
985 | module_init(init_cifs) | |
986 | module_exit(exit_cifs) |