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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 <linux/namei.h> |
39 | #include <net/ipv6.h> |
40 | #include "cifsfs.h" |
41 | #include "cifspdu.h" |
42 | #define DECLARE_GLOBALS_HERE |
43 | #include "cifsglob.h" |
44 | #include "cifsproto.h" |
45 | #include "cifs_debug.h" |
46 | #include "cifs_fs_sb.h" |
47 | #include <linux/mm.h> |
48 | #include <linux/key-type.h> |
49 | #include "cifs_spnego.h" |
50 | #include "fscache.h" |
51 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
52 | |
53 | int cifsFYI = 0; |
54 | int cifsERROR = 1; |
55 | int traceSMB = 0; |
56 | unsigned int oplockEnabled = 1; |
57 | unsigned int linuxExtEnabled = 1; |
58 | unsigned int lookupCacheEnabled = 1; |
59 | unsigned int multiuser_mount = 0; |
60 | unsigned int global_secflags = CIFSSEC_DEF; |
61 | /* unsigned int ntlmv2_support = 0; */ |
62 | unsigned int sign_CIFS_PDUs = 1; |
63 | static const struct super_operations cifs_super_ops; |
64 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
65 | module_param(CIFSMaxBufSize, int, 0); |
66 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
67 | "Default: 16384 Range: 8192 to 130048"); |
68 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
69 | module_param(cifs_min_rcv, int, 0); |
70 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
71 | "1 to 64"); |
72 | unsigned int cifs_min_small = 30; |
73 | module_param(cifs_min_small, int, 0); |
74 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
75 | "Range: 2 to 256"); |
76 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
77 | module_param(cifs_max_pending, int, 0); |
78 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
79 | "Default: 50 Range: 2 to 256"); |
80 | unsigned short echo_retries = 5; |
81 | module_param(echo_retries, ushort, 0644); |
82 | MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and " |
83 | "reconnecting server. Default: 5. 0 means " |
84 | "never reconnect."); |
85 | extern mempool_t *cifs_sm_req_poolp; |
86 | extern mempool_t *cifs_req_poolp; |
87 | extern mempool_t *cifs_mid_poolp; |
88 | |
89 | void |
90 | cifs_sb_active(struct super_block *sb) |
91 | { |
92 | struct cifs_sb_info *server = CIFS_SB(sb); |
93 | |
94 | if (atomic_inc_return(&server->active) == 1) |
95 | atomic_inc(&sb->s_active); |
96 | } |
97 | |
98 | void |
99 | cifs_sb_deactive(struct super_block *sb) |
100 | { |
101 | struct cifs_sb_info *server = CIFS_SB(sb); |
102 | |
103 | if (atomic_dec_and_test(&server->active)) |
104 | deactivate_super(sb); |
105 | } |
106 | |
107 | static int |
108 | cifs_read_super(struct super_block *sb) |
109 | { |
110 | struct inode *inode; |
111 | struct cifs_sb_info *cifs_sb; |
112 | int rc = 0; |
113 | |
114 | cifs_sb = CIFS_SB(sb); |
115 | |
116 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
117 | sb->s_flags |= MS_POSIXACL; |
118 | |
119 | if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) |
120 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
121 | else |
122 | sb->s_maxbytes = MAX_NON_LFS; |
123 | |
124 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
125 | sb->s_time_gran = 100; |
126 | |
127 | sb->s_magic = CIFS_MAGIC_NUMBER; |
128 | sb->s_op = &cifs_super_ops; |
129 | sb->s_bdi = &cifs_sb->bdi; |
130 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
131 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ |
132 | inode = cifs_root_iget(sb); |
133 | |
134 | if (IS_ERR(inode)) { |
135 | rc = PTR_ERR(inode); |
136 | inode = NULL; |
137 | goto out_no_root; |
138 | } |
139 | |
140 | sb->s_root = d_alloc_root(inode); |
141 | |
142 | if (!sb->s_root) { |
143 | rc = -ENOMEM; |
144 | goto out_no_root; |
145 | } |
146 | |
147 | /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ |
148 | if (cifs_sb_master_tcon(cifs_sb)->nocase) |
149 | sb->s_d_op = &cifs_ci_dentry_ops; |
150 | else |
151 | sb->s_d_op = &cifs_dentry_ops; |
152 | |
153 | #ifdef CIFS_NFSD_EXPORT |
154 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
155 | cFYI(1, "export ops supported"); |
156 | sb->s_export_op = &cifs_export_ops; |
157 | } |
158 | #endif /* CIFS_NFSD_EXPORT */ |
159 | |
160 | return 0; |
161 | |
162 | out_no_root: |
163 | cERROR(1, "cifs_read_super: get root inode failed"); |
164 | if (inode) |
165 | iput(inode); |
166 | |
167 | return rc; |
168 | } |
169 | |
170 | static void cifs_kill_sb(struct super_block *sb) |
171 | { |
172 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
173 | kill_anon_super(sb); |
174 | cifs_umount(cifs_sb); |
175 | } |
176 | |
177 | static int |
178 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
179 | { |
180 | struct super_block *sb = dentry->d_sb; |
181 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
182 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
183 | int rc = -EOPNOTSUPP; |
184 | int xid; |
185 | |
186 | xid = GetXid(); |
187 | |
188 | buf->f_type = CIFS_MAGIC_NUMBER; |
189 | |
190 | /* |
191 | * PATH_MAX may be too long - it would presumably be total path, |
192 | * but note that some servers (includinng Samba 3) have a shorter |
193 | * maximum path. |
194 | * |
195 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. |
196 | */ |
197 | buf->f_namelen = PATH_MAX; |
198 | buf->f_files = 0; /* undefined */ |
199 | buf->f_ffree = 0; /* unlimited */ |
200 | |
201 | /* |
202 | * We could add a second check for a QFS Unix capability bit |
203 | */ |
204 | if ((tcon->ses->capabilities & CAP_UNIX) && |
205 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) |
206 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); |
207 | |
208 | /* |
209 | * Only need to call the old QFSInfo if failed on newer one, |
210 | * e.g. by OS/2. |
211 | **/ |
212 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) |
213 | rc = CIFSSMBQFSInfo(xid, tcon, buf); |
214 | |
215 | /* |
216 | * Some old Windows servers also do not support level 103, retry with |
217 | * older level one if old server failed the previous call or we |
218 | * bypassed it because we detected that this was an older LANMAN sess |
219 | */ |
220 | if (rc) |
221 | rc = SMBOldQFSInfo(xid, tcon, buf); |
222 | |
223 | FreeXid(xid); |
224 | return 0; |
225 | } |
226 | |
227 | static int cifs_permission(struct inode *inode, int mask, unsigned int flags) |
228 | { |
229 | struct cifs_sb_info *cifs_sb; |
230 | |
231 | cifs_sb = CIFS_SB(inode->i_sb); |
232 | |
233 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
234 | if ((mask & MAY_EXEC) && !execute_ok(inode)) |
235 | return -EACCES; |
236 | else |
237 | return 0; |
238 | } else /* file mode might have been restricted at mount time |
239 | on the client (above and beyond ACL on servers) for |
240 | servers which do not support setting and viewing mode bits, |
241 | so allowing client to check permissions is useful */ |
242 | return generic_permission(inode, mask, flags, NULL); |
243 | } |
244 | |
245 | static struct kmem_cache *cifs_inode_cachep; |
246 | static struct kmem_cache *cifs_req_cachep; |
247 | static struct kmem_cache *cifs_mid_cachep; |
248 | static struct kmem_cache *cifs_sm_req_cachep; |
249 | mempool_t *cifs_sm_req_poolp; |
250 | mempool_t *cifs_req_poolp; |
251 | mempool_t *cifs_mid_poolp; |
252 | |
253 | static struct inode * |
254 | cifs_alloc_inode(struct super_block *sb) |
255 | { |
256 | struct cifsInodeInfo *cifs_inode; |
257 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
258 | if (!cifs_inode) |
259 | return NULL; |
260 | cifs_inode->cifsAttrs = 0x20; /* default */ |
261 | cifs_inode->time = 0; |
262 | /* Until the file is open and we have gotten oplock |
263 | info back from the server, can not assume caching of |
264 | file data or metadata */ |
265 | cifs_set_oplock_level(cifs_inode, 0); |
266 | cifs_inode->delete_pending = false; |
267 | cifs_inode->invalid_mapping = false; |
268 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
269 | cifs_inode->server_eof = 0; |
270 | cifs_inode->uniqueid = 0; |
271 | cifs_inode->createtime = 0; |
272 | |
273 | /* Can not set i_flags here - they get immediately overwritten |
274 | to zero by the VFS */ |
275 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ |
276 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
277 | return &cifs_inode->vfs_inode; |
278 | } |
279 | |
280 | static void cifs_i_callback(struct rcu_head *head) |
281 | { |
282 | struct inode *inode = container_of(head, struct inode, i_rcu); |
283 | INIT_LIST_HEAD(&inode->i_dentry); |
284 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
285 | } |
286 | |
287 | static void |
288 | cifs_destroy_inode(struct inode *inode) |
289 | { |
290 | call_rcu(&inode->i_rcu, cifs_i_callback); |
291 | } |
292 | |
293 | static void |
294 | cifs_evict_inode(struct inode *inode) |
295 | { |
296 | truncate_inode_pages(&inode->i_data, 0); |
297 | end_writeback(inode); |
298 | cifs_fscache_release_inode_cookie(inode); |
299 | } |
300 | |
301 | static void |
302 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) |
303 | { |
304 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
305 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; |
306 | |
307 | seq_printf(s, ",addr="); |
308 | |
309 | switch (server->dstaddr.ss_family) { |
310 | case AF_INET: |
311 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
312 | break; |
313 | case AF_INET6: |
314 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
315 | if (sa6->sin6_scope_id) |
316 | seq_printf(s, "%%%u", sa6->sin6_scope_id); |
317 | break; |
318 | default: |
319 | seq_printf(s, "(unknown)"); |
320 | } |
321 | } |
322 | |
323 | static void |
324 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) |
325 | { |
326 | seq_printf(s, ",sec="); |
327 | |
328 | switch (server->secType) { |
329 | case LANMAN: |
330 | seq_printf(s, "lanman"); |
331 | break; |
332 | case NTLMv2: |
333 | seq_printf(s, "ntlmv2"); |
334 | break; |
335 | case NTLM: |
336 | seq_printf(s, "ntlm"); |
337 | break; |
338 | case Kerberos: |
339 | seq_printf(s, "krb5"); |
340 | break; |
341 | case RawNTLMSSP: |
342 | seq_printf(s, "ntlmssp"); |
343 | break; |
344 | default: |
345 | /* shouldn't ever happen */ |
346 | seq_printf(s, "unknown"); |
347 | break; |
348 | } |
349 | |
350 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
351 | seq_printf(s, "i"); |
352 | } |
353 | |
354 | /* |
355 | * cifs_show_options() is for displaying mount options in /proc/mounts. |
356 | * Not all settable options are displayed but most of the important |
357 | * ones are. |
358 | */ |
359 | static int |
360 | cifs_show_options(struct seq_file *s, struct vfsmount *m) |
361 | { |
362 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
363 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
364 | struct sockaddr *srcaddr; |
365 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; |
366 | |
367 | cifs_show_security(s, tcon->ses->server); |
368 | |
369 | seq_printf(s, ",unc=%s", tcon->treeName); |
370 | |
371 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) |
372 | seq_printf(s, ",multiuser"); |
373 | else if (tcon->ses->user_name) |
374 | seq_printf(s, ",username=%s", tcon->ses->user_name); |
375 | |
376 | if (tcon->ses->domainName) |
377 | seq_printf(s, ",domain=%s", tcon->ses->domainName); |
378 | |
379 | if (srcaddr->sa_family != AF_UNSPEC) { |
380 | struct sockaddr_in *saddr4; |
381 | struct sockaddr_in6 *saddr6; |
382 | saddr4 = (struct sockaddr_in *)srcaddr; |
383 | saddr6 = (struct sockaddr_in6 *)srcaddr; |
384 | if (srcaddr->sa_family == AF_INET6) |
385 | seq_printf(s, ",srcaddr=%pI6c", |
386 | &saddr6->sin6_addr); |
387 | else if (srcaddr->sa_family == AF_INET) |
388 | seq_printf(s, ",srcaddr=%pI4", |
389 | &saddr4->sin_addr.s_addr); |
390 | else |
391 | seq_printf(s, ",srcaddr=BAD-AF:%i", |
392 | (int)(srcaddr->sa_family)); |
393 | } |
394 | |
395 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
396 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
397 | seq_printf(s, ",forceuid"); |
398 | else |
399 | seq_printf(s, ",noforceuid"); |
400 | |
401 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
402 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
403 | seq_printf(s, ",forcegid"); |
404 | else |
405 | seq_printf(s, ",noforcegid"); |
406 | |
407 | cifs_show_address(s, tcon->ses->server); |
408 | |
409 | if (!tcon->unix_ext) |
410 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", |
411 | cifs_sb->mnt_file_mode, |
412 | cifs_sb->mnt_dir_mode); |
413 | if (tcon->seal) |
414 | seq_printf(s, ",seal"); |
415 | if (tcon->nocase) |
416 | seq_printf(s, ",nocase"); |
417 | if (tcon->retry) |
418 | seq_printf(s, ",hard"); |
419 | if (tcon->unix_ext) |
420 | seq_printf(s, ",unix"); |
421 | else |
422 | seq_printf(s, ",nounix"); |
423 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
424 | seq_printf(s, ",posixpaths"); |
425 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
426 | seq_printf(s, ",setuids"); |
427 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
428 | seq_printf(s, ",serverino"); |
429 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
430 | seq_printf(s, ",rwpidforward"); |
431 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) |
432 | seq_printf(s, ",forcemand"); |
433 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
434 | seq_printf(s, ",directio"); |
435 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
436 | seq_printf(s, ",nouser_xattr"); |
437 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
438 | seq_printf(s, ",mapchars"); |
439 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
440 | seq_printf(s, ",sfu"); |
441 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
442 | seq_printf(s, ",nobrl"); |
443 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
444 | seq_printf(s, ",cifsacl"); |
445 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
446 | seq_printf(s, ",dynperm"); |
447 | if (m->mnt_sb->s_flags & MS_POSIXACL) |
448 | seq_printf(s, ",acl"); |
449 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
450 | seq_printf(s, ",mfsymlinks"); |
451 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
452 | seq_printf(s, ",fsc"); |
453 | |
454 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); |
455 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); |
456 | /* convert actimeo and display it in seconds */ |
457 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
458 | |
459 | return 0; |
460 | } |
461 | |
462 | static void cifs_umount_begin(struct super_block *sb) |
463 | { |
464 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
465 | struct cifs_tcon *tcon; |
466 | |
467 | if (cifs_sb == NULL) |
468 | return; |
469 | |
470 | tcon = cifs_sb_master_tcon(cifs_sb); |
471 | |
472 | spin_lock(&cifs_tcp_ses_lock); |
473 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
474 | /* we have other mounts to same share or we have |
475 | already tried to force umount this and woken up |
476 | all waiting network requests, nothing to do */ |
477 | spin_unlock(&cifs_tcp_ses_lock); |
478 | return; |
479 | } else if (tcon->tc_count == 1) |
480 | tcon->tidStatus = CifsExiting; |
481 | spin_unlock(&cifs_tcp_ses_lock); |
482 | |
483 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
484 | /* cancel_notify_requests(tcon); */ |
485 | if (tcon->ses && tcon->ses->server) { |
486 | cFYI(1, "wake up tasks now - umount begin not complete"); |
487 | wake_up_all(&tcon->ses->server->request_q); |
488 | wake_up_all(&tcon->ses->server->response_q); |
489 | msleep(1); /* yield */ |
490 | /* we have to kick the requests once more */ |
491 | wake_up_all(&tcon->ses->server->response_q); |
492 | msleep(1); |
493 | } |
494 | |
495 | return; |
496 | } |
497 | |
498 | #ifdef CONFIG_CIFS_STATS2 |
499 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) |
500 | { |
501 | /* BB FIXME */ |
502 | return 0; |
503 | } |
504 | #endif |
505 | |
506 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
507 | { |
508 | *flags |= MS_NODIRATIME; |
509 | return 0; |
510 | } |
511 | |
512 | static int cifs_drop_inode(struct inode *inode) |
513 | { |
514 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
515 | |
516 | /* no serverino => unconditional eviction */ |
517 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || |
518 | generic_drop_inode(inode); |
519 | } |
520 | |
521 | static const struct super_operations cifs_super_ops = { |
522 | .statfs = cifs_statfs, |
523 | .alloc_inode = cifs_alloc_inode, |
524 | .destroy_inode = cifs_destroy_inode, |
525 | .drop_inode = cifs_drop_inode, |
526 | .evict_inode = cifs_evict_inode, |
527 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
528 | function unless later we add lazy close of inodes or unless the |
529 | kernel forgets to call us with the same number of releases (closes) |
530 | as opens */ |
531 | .show_options = cifs_show_options, |
532 | .umount_begin = cifs_umount_begin, |
533 | .remount_fs = cifs_remount, |
534 | #ifdef CONFIG_CIFS_STATS2 |
535 | .show_stats = cifs_show_stats, |
536 | #endif |
537 | }; |
538 | |
539 | /* |
540 | * Get root dentry from superblock according to prefix path mount option. |
541 | * Return dentry with refcount + 1 on success and NULL otherwise. |
542 | */ |
543 | static struct dentry * |
544 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) |
545 | { |
546 | struct dentry *dentry; |
547 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
548 | char *full_path = NULL; |
549 | char *s, *p; |
550 | char sep; |
551 | int xid; |
552 | |
553 | full_path = cifs_build_path_to_root(vol, cifs_sb, |
554 | cifs_sb_master_tcon(cifs_sb)); |
555 | if (full_path == NULL) |
556 | return ERR_PTR(-ENOMEM); |
557 | |
558 | cFYI(1, "Get root dentry for %s", full_path); |
559 | |
560 | xid = GetXid(); |
561 | sep = CIFS_DIR_SEP(cifs_sb); |
562 | dentry = dget(sb->s_root); |
563 | p = s = full_path; |
564 | |
565 | do { |
566 | struct inode *dir = dentry->d_inode; |
567 | struct dentry *child; |
568 | |
569 | /* skip separators */ |
570 | while (*s == sep) |
571 | s++; |
572 | if (!*s) |
573 | break; |
574 | p = s++; |
575 | /* next separator */ |
576 | while (*s && *s != sep) |
577 | s++; |
578 | |
579 | mutex_lock(&dir->i_mutex); |
580 | child = lookup_one_len(p, dentry, s - p); |
581 | mutex_unlock(&dir->i_mutex); |
582 | dput(dentry); |
583 | dentry = child; |
584 | } while (!IS_ERR(dentry)); |
585 | _FreeXid(xid); |
586 | kfree(full_path); |
587 | return dentry; |
588 | } |
589 | |
590 | static int cifs_set_super(struct super_block *sb, void *data) |
591 | { |
592 | struct cifs_mnt_data *mnt_data = data; |
593 | sb->s_fs_info = mnt_data->cifs_sb; |
594 | return set_anon_super(sb, NULL); |
595 | } |
596 | |
597 | static struct dentry * |
598 | cifs_do_mount(struct file_system_type *fs_type, |
599 | int flags, const char *dev_name, void *data) |
600 | { |
601 | int rc; |
602 | struct super_block *sb; |
603 | struct cifs_sb_info *cifs_sb; |
604 | struct smb_vol *volume_info; |
605 | struct cifs_mnt_data mnt_data; |
606 | struct dentry *root; |
607 | |
608 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
609 | |
610 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
611 | if (IS_ERR(volume_info)) |
612 | return ERR_CAST(volume_info); |
613 | |
614 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
615 | if (cifs_sb == NULL) { |
616 | root = ERR_PTR(-ENOMEM); |
617 | goto out_nls; |
618 | } |
619 | |
620 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
621 | if (cifs_sb->mountdata == NULL) { |
622 | root = ERR_PTR(-ENOMEM); |
623 | goto out_cifs_sb; |
624 | } |
625 | |
626 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
627 | |
628 | rc = cifs_mount(cifs_sb, volume_info); |
629 | if (rc) { |
630 | if (!(flags & MS_SILENT)) |
631 | cERROR(1, "cifs_mount failed w/return code = %d", rc); |
632 | root = ERR_PTR(rc); |
633 | goto out_mountdata; |
634 | } |
635 | |
636 | mnt_data.vol = volume_info; |
637 | mnt_data.cifs_sb = cifs_sb; |
638 | mnt_data.flags = flags; |
639 | |
640 | sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data); |
641 | if (IS_ERR(sb)) { |
642 | root = ERR_CAST(sb); |
643 | cifs_umount(cifs_sb); |
644 | goto out; |
645 | } |
646 | |
647 | if (sb->s_root) { |
648 | cFYI(1, "Use existing superblock"); |
649 | cifs_umount(cifs_sb); |
650 | } else { |
651 | sb->s_flags = flags; |
652 | /* BB should we make this contingent on mount parm? */ |
653 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; |
654 | |
655 | rc = cifs_read_super(sb); |
656 | if (rc) { |
657 | root = ERR_PTR(rc); |
658 | goto out_super; |
659 | } |
660 | |
661 | sb->s_flags |= MS_ACTIVE; |
662 | } |
663 | |
664 | root = cifs_get_root(volume_info, sb); |
665 | if (IS_ERR(root)) |
666 | goto out_super; |
667 | |
668 | cFYI(1, "dentry root is: %p", root); |
669 | goto out; |
670 | |
671 | out_super: |
672 | deactivate_locked_super(sb); |
673 | out: |
674 | cifs_cleanup_volume_info(volume_info); |
675 | return root; |
676 | |
677 | out_mountdata: |
678 | kfree(cifs_sb->mountdata); |
679 | out_cifs_sb: |
680 | kfree(cifs_sb); |
681 | out_nls: |
682 | unload_nls(volume_info->local_nls); |
683 | goto out; |
684 | } |
685 | |
686 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
687 | unsigned long nr_segs, loff_t pos) |
688 | { |
689 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
690 | ssize_t written; |
691 | int rc; |
692 | |
693 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
694 | |
695 | if (CIFS_I(inode)->clientCanCacheAll) |
696 | return written; |
697 | |
698 | rc = filemap_fdatawrite(inode->i_mapping); |
699 | if (rc) |
700 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); |
701 | |
702 | return written; |
703 | } |
704 | |
705 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
706 | { |
707 | /* origin == SEEK_END => we must revalidate the cached file length */ |
708 | if (origin == SEEK_END) { |
709 | int rc; |
710 | struct inode *inode = file->f_path.dentry->d_inode; |
711 | |
712 | /* |
713 | * We need to be sure that all dirty pages are written and the |
714 | * server has the newest file length. |
715 | */ |
716 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && |
717 | inode->i_mapping->nrpages != 0) { |
718 | rc = filemap_fdatawait(inode->i_mapping); |
719 | if (rc) { |
720 | mapping_set_error(inode->i_mapping, rc); |
721 | return rc; |
722 | } |
723 | } |
724 | /* |
725 | * Some applications poll for the file length in this strange |
726 | * way so we must seek to end on non-oplocked files by |
727 | * setting the revalidate time to zero. |
728 | */ |
729 | CIFS_I(inode)->time = 0; |
730 | |
731 | rc = cifs_revalidate_file_attr(file); |
732 | if (rc < 0) |
733 | return (loff_t)rc; |
734 | } |
735 | return generic_file_llseek_unlocked(file, offset, origin); |
736 | } |
737 | |
738 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
739 | { |
740 | /* note that this is called by vfs setlease with lock_flocks held |
741 | to protect *lease from going away */ |
742 | struct inode *inode = file->f_path.dentry->d_inode; |
743 | struct cifsFileInfo *cfile = file->private_data; |
744 | |
745 | if (!(S_ISREG(inode->i_mode))) |
746 | return -EINVAL; |
747 | |
748 | /* check if file is oplocked */ |
749 | if (((arg == F_RDLCK) && |
750 | (CIFS_I(inode)->clientCanCacheRead)) || |
751 | ((arg == F_WRLCK) && |
752 | (CIFS_I(inode)->clientCanCacheAll))) |
753 | return generic_setlease(file, arg, lease); |
754 | else if (tlink_tcon(cfile->tlink)->local_lease && |
755 | !CIFS_I(inode)->clientCanCacheRead) |
756 | /* If the server claims to support oplock on this |
757 | file, then we still need to check oplock even |
758 | if the local_lease mount option is set, but there |
759 | are servers which do not support oplock for which |
760 | this mount option may be useful if the user |
761 | knows that the file won't be changed on the server |
762 | by anyone else */ |
763 | return generic_setlease(file, arg, lease); |
764 | else |
765 | return -EAGAIN; |
766 | } |
767 | |
768 | struct file_system_type cifs_fs_type = { |
769 | .owner = THIS_MODULE, |
770 | .name = "cifs", |
771 | .mount = cifs_do_mount, |
772 | .kill_sb = cifs_kill_sb, |
773 | /* .fs_flags */ |
774 | }; |
775 | const struct inode_operations cifs_dir_inode_ops = { |
776 | .create = cifs_create, |
777 | .lookup = cifs_lookup, |
778 | .getattr = cifs_getattr, |
779 | .unlink = cifs_unlink, |
780 | .link = cifs_hardlink, |
781 | .mkdir = cifs_mkdir, |
782 | .rmdir = cifs_rmdir, |
783 | .rename = cifs_rename, |
784 | .permission = cifs_permission, |
785 | /* revalidate:cifs_revalidate, */ |
786 | .setattr = cifs_setattr, |
787 | .symlink = cifs_symlink, |
788 | .mknod = cifs_mknod, |
789 | #ifdef CONFIG_CIFS_XATTR |
790 | .setxattr = cifs_setxattr, |
791 | .getxattr = cifs_getxattr, |
792 | .listxattr = cifs_listxattr, |
793 | .removexattr = cifs_removexattr, |
794 | #endif |
795 | }; |
796 | |
797 | const struct inode_operations cifs_file_inode_ops = { |
798 | /* revalidate:cifs_revalidate, */ |
799 | .setattr = cifs_setattr, |
800 | .getattr = cifs_getattr, /* do we need this anymore? */ |
801 | .rename = cifs_rename, |
802 | .permission = cifs_permission, |
803 | #ifdef CONFIG_CIFS_XATTR |
804 | .setxattr = cifs_setxattr, |
805 | .getxattr = cifs_getxattr, |
806 | .listxattr = cifs_listxattr, |
807 | .removexattr = cifs_removexattr, |
808 | #endif |
809 | }; |
810 | |
811 | const struct inode_operations cifs_symlink_inode_ops = { |
812 | .readlink = generic_readlink, |
813 | .follow_link = cifs_follow_link, |
814 | .put_link = cifs_put_link, |
815 | .permission = cifs_permission, |
816 | /* BB add the following two eventually */ |
817 | /* revalidate: cifs_revalidate, |
818 | setattr: cifs_notify_change, *//* BB do we need notify change */ |
819 | #ifdef CONFIG_CIFS_XATTR |
820 | .setxattr = cifs_setxattr, |
821 | .getxattr = cifs_getxattr, |
822 | .listxattr = cifs_listxattr, |
823 | .removexattr = cifs_removexattr, |
824 | #endif |
825 | }; |
826 | |
827 | const struct file_operations cifs_file_ops = { |
828 | .read = do_sync_read, |
829 | .write = do_sync_write, |
830 | .aio_read = generic_file_aio_read, |
831 | .aio_write = cifs_file_aio_write, |
832 | .open = cifs_open, |
833 | .release = cifs_close, |
834 | .lock = cifs_lock, |
835 | .fsync = cifs_fsync, |
836 | .flush = cifs_flush, |
837 | .mmap = cifs_file_mmap, |
838 | .splice_read = generic_file_splice_read, |
839 | .llseek = cifs_llseek, |
840 | #ifdef CONFIG_CIFS_POSIX |
841 | .unlocked_ioctl = cifs_ioctl, |
842 | #endif /* CONFIG_CIFS_POSIX */ |
843 | .setlease = cifs_setlease, |
844 | }; |
845 | |
846 | const struct file_operations cifs_file_strict_ops = { |
847 | .read = do_sync_read, |
848 | .write = do_sync_write, |
849 | .aio_read = cifs_strict_readv, |
850 | .aio_write = cifs_strict_writev, |
851 | .open = cifs_open, |
852 | .release = cifs_close, |
853 | .lock = cifs_lock, |
854 | .fsync = cifs_strict_fsync, |
855 | .flush = cifs_flush, |
856 | .mmap = cifs_file_strict_mmap, |
857 | .splice_read = generic_file_splice_read, |
858 | .llseek = cifs_llseek, |
859 | #ifdef CONFIG_CIFS_POSIX |
860 | .unlocked_ioctl = cifs_ioctl, |
861 | #endif /* CONFIG_CIFS_POSIX */ |
862 | .setlease = cifs_setlease, |
863 | }; |
864 | |
865 | const struct file_operations cifs_file_direct_ops = { |
866 | /* BB reevaluate whether they can be done with directio, no cache */ |
867 | .read = do_sync_read, |
868 | .write = do_sync_write, |
869 | .aio_read = cifs_user_readv, |
870 | .aio_write = cifs_user_writev, |
871 | .open = cifs_open, |
872 | .release = cifs_close, |
873 | .lock = cifs_lock, |
874 | .fsync = cifs_fsync, |
875 | .flush = cifs_flush, |
876 | .mmap = cifs_file_mmap, |
877 | .splice_read = generic_file_splice_read, |
878 | #ifdef CONFIG_CIFS_POSIX |
879 | .unlocked_ioctl = cifs_ioctl, |
880 | #endif /* CONFIG_CIFS_POSIX */ |
881 | .llseek = cifs_llseek, |
882 | .setlease = cifs_setlease, |
883 | }; |
884 | |
885 | const struct file_operations cifs_file_nobrl_ops = { |
886 | .read = do_sync_read, |
887 | .write = do_sync_write, |
888 | .aio_read = generic_file_aio_read, |
889 | .aio_write = cifs_file_aio_write, |
890 | .open = cifs_open, |
891 | .release = cifs_close, |
892 | .fsync = cifs_fsync, |
893 | .flush = cifs_flush, |
894 | .mmap = cifs_file_mmap, |
895 | .splice_read = generic_file_splice_read, |
896 | .llseek = cifs_llseek, |
897 | #ifdef CONFIG_CIFS_POSIX |
898 | .unlocked_ioctl = cifs_ioctl, |
899 | #endif /* CONFIG_CIFS_POSIX */ |
900 | .setlease = cifs_setlease, |
901 | }; |
902 | |
903 | const struct file_operations cifs_file_strict_nobrl_ops = { |
904 | .read = do_sync_read, |
905 | .write = do_sync_write, |
906 | .aio_read = cifs_strict_readv, |
907 | .aio_write = cifs_strict_writev, |
908 | .open = cifs_open, |
909 | .release = cifs_close, |
910 | .fsync = cifs_strict_fsync, |
911 | .flush = cifs_flush, |
912 | .mmap = cifs_file_strict_mmap, |
913 | .splice_read = generic_file_splice_read, |
914 | .llseek = cifs_llseek, |
915 | #ifdef CONFIG_CIFS_POSIX |
916 | .unlocked_ioctl = cifs_ioctl, |
917 | #endif /* CONFIG_CIFS_POSIX */ |
918 | .setlease = cifs_setlease, |
919 | }; |
920 | |
921 | const struct file_operations cifs_file_direct_nobrl_ops = { |
922 | /* BB reevaluate whether they can be done with directio, no cache */ |
923 | .read = do_sync_read, |
924 | .write = do_sync_write, |
925 | .aio_read = cifs_user_readv, |
926 | .aio_write = cifs_user_writev, |
927 | .open = cifs_open, |
928 | .release = cifs_close, |
929 | .fsync = cifs_fsync, |
930 | .flush = cifs_flush, |
931 | .mmap = cifs_file_mmap, |
932 | .splice_read = generic_file_splice_read, |
933 | #ifdef CONFIG_CIFS_POSIX |
934 | .unlocked_ioctl = cifs_ioctl, |
935 | #endif /* CONFIG_CIFS_POSIX */ |
936 | .llseek = cifs_llseek, |
937 | .setlease = cifs_setlease, |
938 | }; |
939 | |
940 | const struct file_operations cifs_dir_ops = { |
941 | .readdir = cifs_readdir, |
942 | .release = cifs_closedir, |
943 | .read = generic_read_dir, |
944 | .unlocked_ioctl = cifs_ioctl, |
945 | .llseek = generic_file_llseek, |
946 | }; |
947 | |
948 | static void |
949 | cifs_init_once(void *inode) |
950 | { |
951 | struct cifsInodeInfo *cifsi = inode; |
952 | |
953 | inode_init_once(&cifsi->vfs_inode); |
954 | INIT_LIST_HEAD(&cifsi->lockList); |
955 | } |
956 | |
957 | static int |
958 | cifs_init_inodecache(void) |
959 | { |
960 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", |
961 | sizeof(struct cifsInodeInfo), |
962 | 0, (SLAB_RECLAIM_ACCOUNT| |
963 | SLAB_MEM_SPREAD), |
964 | cifs_init_once); |
965 | if (cifs_inode_cachep == NULL) |
966 | return -ENOMEM; |
967 | |
968 | return 0; |
969 | } |
970 | |
971 | static void |
972 | cifs_destroy_inodecache(void) |
973 | { |
974 | kmem_cache_destroy(cifs_inode_cachep); |
975 | } |
976 | |
977 | static int |
978 | cifs_init_request_bufs(void) |
979 | { |
980 | if (CIFSMaxBufSize < 8192) { |
981 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
982 | Unicode path name has to fit in any SMB/CIFS path based frames */ |
983 | CIFSMaxBufSize = 8192; |
984 | } else if (CIFSMaxBufSize > 1024*127) { |
985 | CIFSMaxBufSize = 1024 * 127; |
986 | } else { |
987 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ |
988 | } |
989 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
990 | cifs_req_cachep = kmem_cache_create("cifs_request", |
991 | CIFSMaxBufSize + |
992 | MAX_CIFS_HDR_SIZE, 0, |
993 | SLAB_HWCACHE_ALIGN, NULL); |
994 | if (cifs_req_cachep == NULL) |
995 | return -ENOMEM; |
996 | |
997 | if (cifs_min_rcv < 1) |
998 | cifs_min_rcv = 1; |
999 | else if (cifs_min_rcv > 64) { |
1000 | cifs_min_rcv = 64; |
1001 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1002 | } |
1003 | |
1004 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1005 | cifs_req_cachep); |
1006 | |
1007 | if (cifs_req_poolp == NULL) { |
1008 | kmem_cache_destroy(cifs_req_cachep); |
1009 | return -ENOMEM; |
1010 | } |
1011 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1012 | almost all handle based requests (but not write response, nor is it |
1013 | sufficient for path based requests). A smaller size would have |
1014 | been more efficient (compacting multiple slab items on one 4k page) |
1015 | for the case in which debug was on, but this larger size allows |
1016 | more SMBs to use small buffer alloc and is still much more |
1017 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1018 | alloc of large cifs buffers even when page debugging is on */ |
1019 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", |
1020 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
1021 | NULL); |
1022 | if (cifs_sm_req_cachep == NULL) { |
1023 | mempool_destroy(cifs_req_poolp); |
1024 | kmem_cache_destroy(cifs_req_cachep); |
1025 | return -ENOMEM; |
1026 | } |
1027 | |
1028 | if (cifs_min_small < 2) |
1029 | cifs_min_small = 2; |
1030 | else if (cifs_min_small > 256) { |
1031 | cifs_min_small = 256; |
1032 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1033 | } |
1034 | |
1035 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1036 | cifs_sm_req_cachep); |
1037 | |
1038 | if (cifs_sm_req_poolp == NULL) { |
1039 | mempool_destroy(cifs_req_poolp); |
1040 | kmem_cache_destroy(cifs_req_cachep); |
1041 | kmem_cache_destroy(cifs_sm_req_cachep); |
1042 | return -ENOMEM; |
1043 | } |
1044 | |
1045 | return 0; |
1046 | } |
1047 | |
1048 | static void |
1049 | cifs_destroy_request_bufs(void) |
1050 | { |
1051 | mempool_destroy(cifs_req_poolp); |
1052 | kmem_cache_destroy(cifs_req_cachep); |
1053 | mempool_destroy(cifs_sm_req_poolp); |
1054 | kmem_cache_destroy(cifs_sm_req_cachep); |
1055 | } |
1056 | |
1057 | static int |
1058 | cifs_init_mids(void) |
1059 | { |
1060 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", |
1061 | sizeof(struct mid_q_entry), 0, |
1062 | SLAB_HWCACHE_ALIGN, NULL); |
1063 | if (cifs_mid_cachep == NULL) |
1064 | return -ENOMEM; |
1065 | |
1066 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1067 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); |
1068 | if (cifs_mid_poolp == NULL) { |
1069 | kmem_cache_destroy(cifs_mid_cachep); |
1070 | return -ENOMEM; |
1071 | } |
1072 | |
1073 | return 0; |
1074 | } |
1075 | |
1076 | static void |
1077 | cifs_destroy_mids(void) |
1078 | { |
1079 | mempool_destroy(cifs_mid_poolp); |
1080 | kmem_cache_destroy(cifs_mid_cachep); |
1081 | } |
1082 | |
1083 | static int __init |
1084 | init_cifs(void) |
1085 | { |
1086 | int rc = 0; |
1087 | cifs_proc_init(); |
1088 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
1089 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
1090 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1091 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); |
1092 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1093 | /* |
1094 | * Initialize Global counters |
1095 | */ |
1096 | atomic_set(&sesInfoAllocCount, 0); |
1097 | atomic_set(&tconInfoAllocCount, 0); |
1098 | atomic_set(&tcpSesAllocCount, 0); |
1099 | atomic_set(&tcpSesReconnectCount, 0); |
1100 | atomic_set(&tconInfoReconnectCount, 0); |
1101 | |
1102 | atomic_set(&bufAllocCount, 0); |
1103 | atomic_set(&smBufAllocCount, 0); |
1104 | #ifdef CONFIG_CIFS_STATS2 |
1105 | atomic_set(&totBufAllocCount, 0); |
1106 | atomic_set(&totSmBufAllocCount, 0); |
1107 | #endif /* CONFIG_CIFS_STATS2 */ |
1108 | |
1109 | atomic_set(&midCount, 0); |
1110 | GlobalCurrentXid = 0; |
1111 | GlobalTotalActiveXid = 0; |
1112 | GlobalMaxActiveXid = 0; |
1113 | spin_lock_init(&cifs_tcp_ses_lock); |
1114 | spin_lock_init(&cifs_file_list_lock); |
1115 | spin_lock_init(&GlobalMid_Lock); |
1116 | |
1117 | if (cifs_max_pending < 2) { |
1118 | cifs_max_pending = 2; |
1119 | cFYI(1, "cifs_max_pending set to min of 2"); |
1120 | } else if (cifs_max_pending > 256) { |
1121 | cifs_max_pending = 256; |
1122 | cFYI(1, "cifs_max_pending set to max of 256"); |
1123 | } |
1124 | |
1125 | rc = cifs_fscache_register(); |
1126 | if (rc) |
1127 | goto out_clean_proc; |
1128 | |
1129 | rc = cifs_init_inodecache(); |
1130 | if (rc) |
1131 | goto out_unreg_fscache; |
1132 | |
1133 | rc = cifs_init_mids(); |
1134 | if (rc) |
1135 | goto out_destroy_inodecache; |
1136 | |
1137 | rc = cifs_init_request_bufs(); |
1138 | if (rc) |
1139 | goto out_destroy_mids; |
1140 | |
1141 | #ifdef CONFIG_CIFS_UPCALL |
1142 | rc = register_key_type(&cifs_spnego_key_type); |
1143 | if (rc) |
1144 | goto out_destroy_request_bufs; |
1145 | #endif /* CONFIG_CIFS_UPCALL */ |
1146 | |
1147 | #ifdef CONFIG_CIFS_ACL |
1148 | rc = init_cifs_idmap(); |
1149 | if (rc) |
1150 | goto out_register_key_type; |
1151 | #endif /* CONFIG_CIFS_ACL */ |
1152 | |
1153 | rc = register_filesystem(&cifs_fs_type); |
1154 | if (rc) |
1155 | goto out_init_cifs_idmap; |
1156 | |
1157 | return 0; |
1158 | |
1159 | out_init_cifs_idmap: |
1160 | #ifdef CONFIG_CIFS_ACL |
1161 | exit_cifs_idmap(); |
1162 | out_register_key_type: |
1163 | #endif |
1164 | #ifdef CONFIG_CIFS_UPCALL |
1165 | unregister_key_type(&cifs_spnego_key_type); |
1166 | out_destroy_request_bufs: |
1167 | #endif |
1168 | cifs_destroy_request_bufs(); |
1169 | out_destroy_mids: |
1170 | cifs_destroy_mids(); |
1171 | out_destroy_inodecache: |
1172 | cifs_destroy_inodecache(); |
1173 | out_unreg_fscache: |
1174 | cifs_fscache_unregister(); |
1175 | out_clean_proc: |
1176 | cifs_proc_clean(); |
1177 | return rc; |
1178 | } |
1179 | |
1180 | static void __exit |
1181 | exit_cifs(void) |
1182 | { |
1183 | cFYI(DBG2, "exit_cifs"); |
1184 | cifs_proc_clean(); |
1185 | cifs_fscache_unregister(); |
1186 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1187 | cifs_dfs_release_automount_timer(); |
1188 | #endif |
1189 | #ifdef CONFIG_CIFS_ACL |
1190 | cifs_destroy_idmaptrees(); |
1191 | exit_cifs_idmap(); |
1192 | #endif |
1193 | #ifdef CONFIG_CIFS_UPCALL |
1194 | unregister_key_type(&cifs_spnego_key_type); |
1195 | #endif |
1196 | unregister_filesystem(&cifs_fs_type); |
1197 | cifs_destroy_inodecache(); |
1198 | cifs_destroy_mids(); |
1199 | cifs_destroy_request_bufs(); |
1200 | } |
1201 | |
1202 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); |
1203 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1204 | MODULE_DESCRIPTION |
1205 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1206 | "e.g. Samba and Windows"); |
1207 | MODULE_VERSION(CIFS_VERSION); |
1208 | module_init(init_cifs) |
1209 | module_exit(exit_cifs) |
1210 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9