Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
2b280fab | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * Common Internet FileSystem (CIFS) client | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/mount.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/list.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/vfs.h> | |
34 | #include <linux/mempool.h> | |
6ab16d24 | 35 | #include <linux/delay.h> |
45af7a0f | 36 | #include <linux/kthread.h> |
7dfb7103 | 37 | #include <linux/freezer.h> |
1da177e4 LT |
38 | #include "cifsfs.h" |
39 | #include "cifspdu.h" | |
40 | #define DECLARE_GLOBALS_HERE | |
41 | #include "cifsglob.h" | |
42 | #include "cifsproto.h" | |
43 | #include "cifs_debug.h" | |
44 | #include "cifs_fs_sb.h" | |
45 | #include <linux/mm.h> | |
84a15b93 | 46 | #include <linux/key-type.h> |
e545937a | 47 | #include "cifs_spnego.h" |
f579cf3c | 48 | #include "fscache.h" |
1da177e4 LT |
49 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
50 | ||
1da177e4 LT |
51 | int cifsFYI = 0; |
52 | int cifsERROR = 1; | |
53 | int traceSMB = 0; | |
54 | unsigned int oplockEnabled = 1; | |
55 | unsigned int experimEnabled = 0; | |
56 | unsigned int linuxExtEnabled = 1; | |
57 | unsigned int lookupCacheEnabled = 1; | |
58 | unsigned int multiuser_mount = 0; | |
04912d6a | 59 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 60 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 61 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 62 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
63 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
64 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
65 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
66 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
67 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
68 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
69 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
70 | "1 to 64"); | |
1da177e4 LT |
71 | unsigned int cifs_min_small = 30; |
72 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
73 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
74 | "Range: 2 to 256"); | |
1da177e4 LT |
75 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
76 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
77 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
78 | "Default: 50 Range: 2 to 256"); | |
1da177e4 | 79 | |
1da177e4 LT |
80 | extern mempool_t *cifs_sm_req_poolp; |
81 | extern mempool_t *cifs_req_poolp; | |
82 | extern mempool_t *cifs_mid_poolp; | |
83 | ||
1da177e4 LT |
84 | static int |
85 | cifs_read_super(struct super_block *sb, void *data, | |
86 | const char *devname, int silent) | |
87 | { | |
88 | struct inode *inode; | |
89 | struct cifs_sb_info *cifs_sb; | |
90 | int rc = 0; | |
50c2f753 | 91 | |
1b2b2126 SF |
92 | /* BB should we make this contingent on mount parm? */ |
93 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 94 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 95 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 96 | if (cifs_sb == NULL) |
1da177e4 | 97 | return -ENOMEM; |
1da177e4 | 98 | |
8044f7f4 JA |
99 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); |
100 | if (rc) { | |
101 | kfree(cifs_sb); | |
102 | return rc; | |
103 | } | |
104 | ||
e6ab1582 IM |
105 | #ifdef CONFIG_CIFS_DFS_UPCALL |
106 | /* copy mount params to sb for use in submounts */ | |
107 | /* BB: should we move this after the mount so we | |
108 | * do not have to do the copy on failed mounts? | |
109 | * BB: May be it is better to do simple copy before | |
110 | * complex operation (mount), and in case of fail | |
111 | * just exit instead of doing mount and attempting | |
112 | * undo it if this copy fails?*/ | |
79ee9a8b SF |
113 | if (data) { |
114 | int len = strlen(data); | |
115 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
116 | if (cifs_sb->mountdata == NULL) { | |
8044f7f4 | 117 | bdi_destroy(&cifs_sb->bdi); |
79ee9a8b SF |
118 | kfree(sb->s_fs_info); |
119 | sb->s_fs_info = NULL; | |
120 | return -ENOMEM; | |
121 | } | |
122 | strncpy(cifs_sb->mountdata, data, len + 1); | |
123 | cifs_sb->mountdata[len] = '\0'; | |
e6ab1582 | 124 | } |
e6ab1582 IM |
125 | #endif |
126 | ||
1da177e4 LT |
127 | rc = cifs_mount(sb, cifs_sb, data, devname); |
128 | ||
129 | if (rc) { | |
130 | if (!silent) | |
b6b38f70 | 131 | cERROR(1, "cifs_mount failed w/return code = %d", rc); |
1da177e4 LT |
132 | goto out_mount_failed; |
133 | } | |
134 | ||
135 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
136 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 137 | sb->s_bdi = &cifs_sb->bdi; |
4523cc30 | 138 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
790fe579 SF |
139 | sb->s_blocksize = |
140 | cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
1da177e4 LT |
141 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
142 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
bd433d4c | 143 | inode = cifs_root_iget(sb, ROOT_I); |
1da177e4 | 144 | |
ce634ab2 DH |
145 | if (IS_ERR(inode)) { |
146 | rc = PTR_ERR(inode); | |
147 | inode = NULL; | |
1da177e4 LT |
148 | goto out_no_root; |
149 | } | |
150 | ||
151 | sb->s_root = d_alloc_root(inode); | |
152 | ||
153 | if (!sb->s_root) { | |
154 | rc = -ENOMEM; | |
155 | goto out_no_root; | |
156 | } | |
50c2f753 | 157 | |
7521a3c5 SF |
158 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
159 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
b6b38f70 | 160 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
161 | sb->s_export_op = &cifs_export_ops; |
162 | } | |
163 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
164 | |
165 | return 0; | |
166 | ||
167 | out_no_root: | |
b6b38f70 | 168 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
169 | if (inode) |
170 | iput(inode); | |
54b4602d | 171 | |
2c731afb | 172 | cifs_umount(sb, cifs_sb); |
1da177e4 LT |
173 | |
174 | out_mount_failed: | |
4523cc30 | 175 | if (cifs_sb) { |
e6ab1582 IM |
176 | #ifdef CONFIG_CIFS_DFS_UPCALL |
177 | if (cifs_sb->mountdata) { | |
178 | kfree(cifs_sb->mountdata); | |
179 | cifs_sb->mountdata = NULL; | |
180 | } | |
181 | #endif | |
6d729e44 | 182 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 183 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 LT |
184 | kfree(cifs_sb); |
185 | } | |
186 | return rc; | |
187 | } | |
188 | ||
189 | static void | |
190 | cifs_put_super(struct super_block *sb) | |
191 | { | |
192 | int rc = 0; | |
193 | struct cifs_sb_info *cifs_sb; | |
194 | ||
b6b38f70 | 195 | cFYI(1, "In cifs_put_super"); |
1da177e4 | 196 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 197 | if (cifs_sb == NULL) { |
b6b38f70 | 198 | cFYI(1, "Empty cifs superblock info passed to unmount"); |
1da177e4 LT |
199 | return; |
200 | } | |
6cfd0148 | 201 | |
790fe579 | 202 | rc = cifs_umount(sb, cifs_sb); |
ad7a2926 | 203 | if (rc) |
b6b38f70 | 204 | cERROR(1, "cifs_umount failed with return code %d", rc); |
e6ab1582 IM |
205 | #ifdef CONFIG_CIFS_DFS_UPCALL |
206 | if (cifs_sb->mountdata) { | |
207 | kfree(cifs_sb->mountdata); | |
208 | cifs_sb->mountdata = NULL; | |
209 | } | |
210 | #endif | |
211 | ||
1da177e4 | 212 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 213 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 | 214 | kfree(cifs_sb); |
1da177e4 LT |
215 | } |
216 | ||
217 | static int | |
726c3342 | 218 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 219 | { |
726c3342 | 220 | struct super_block *sb = dentry->d_sb; |
39da9847 SF |
221 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
222 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
c81156dd | 223 | int rc = -EOPNOTSUPP; |
39da9847 | 224 | int xid; |
1da177e4 LT |
225 | |
226 | xid = GetXid(); | |
227 | ||
1da177e4 LT |
228 | buf->f_type = CIFS_MAGIC_NUMBER; |
229 | ||
39da9847 SF |
230 | /* |
231 | * PATH_MAX may be too long - it would presumably be total path, | |
232 | * but note that some servers (includinng Samba 3) have a shorter | |
233 | * maximum path. | |
234 | * | |
235 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
236 | */ | |
237 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
238 | buf->f_files = 0; /* undefined */ |
239 | buf->f_ffree = 0; /* unlimited */ | |
240 | ||
39da9847 SF |
241 | /* |
242 | * We could add a second check for a QFS Unix capability bit | |
243 | */ | |
244 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
245 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
246 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
247 | ||
248 | /* | |
249 | * Only need to call the old QFSInfo if failed on newer one, | |
250 | * e.g. by OS/2. | |
251 | **/ | |
252 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
253 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
254 | ||
255 | /* | |
256 | * Some old Windows servers also do not support level 103, retry with | |
257 | * older level one if old server failed the previous call or we | |
258 | * bypassed it because we detected that this was an older LANMAN sess | |
259 | */ | |
4523cc30 | 260 | if (rc) |
39da9847 SF |
261 | rc = SMBOldQFSInfo(xid, tcon, buf); |
262 | ||
1da177e4 | 263 | FreeXid(xid); |
39da9847 | 264 | return 0; |
1da177e4 LT |
265 | } |
266 | ||
e6305c43 | 267 | static int cifs_permission(struct inode *inode, int mask) |
1da177e4 LT |
268 | { |
269 | struct cifs_sb_info *cifs_sb; | |
270 | ||
271 | cifs_sb = CIFS_SB(inode->i_sb); | |
272 | ||
f696a365 MS |
273 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
274 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
275 | return -EACCES; | |
276 | else | |
277 | return 0; | |
278 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 279 | on the client (above and beyond ACL on servers) for |
1da177e4 | 280 | servers which do not support setting and viewing mode bits, |
50c2f753 | 281 | so allowing client to check permissions is useful */ |
1da177e4 LT |
282 | return generic_permission(inode, mask, NULL); |
283 | } | |
284 | ||
e18b890b CL |
285 | static struct kmem_cache *cifs_inode_cachep; |
286 | static struct kmem_cache *cifs_req_cachep; | |
287 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 288 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
289 | mempool_t *cifs_sm_req_poolp; |
290 | mempool_t *cifs_req_poolp; | |
291 | mempool_t *cifs_mid_poolp; | |
292 | ||
293 | static struct inode * | |
294 | cifs_alloc_inode(struct super_block *sb) | |
295 | { | |
296 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 297 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
298 | if (!cifs_inode) |
299 | return NULL; | |
300 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 | 301 | cifs_inode->time = 0; |
cea21805 | 302 | cifs_inode->write_behind_rc = 0; |
1da177e4 LT |
303 | /* Until the file is open and we have gotten oplock |
304 | info back from the server, can not assume caching of | |
305 | file data or metadata */ | |
4b18f2a9 SF |
306 | cifs_inode->clientCanCacheRead = false; |
307 | cifs_inode->clientCanCacheAll = false; | |
9a8165fc | 308 | cifs_inode->delete_pending = false; |
df2cf170 | 309 | cifs_inode->invalid_mapping = false; |
1da177e4 | 310 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 311 | cifs_inode->server_eof = 0; |
50c2f753 | 312 | |
1b2b2126 SF |
313 | /* Can not set i_flags here - they get immediately overwritten |
314 | to zero by the VFS */ | |
315 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
316 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
317 | return &cifs_inode->vfs_inode; | |
318 | } | |
319 | ||
320 | static void | |
321 | cifs_destroy_inode(struct inode *inode) | |
322 | { | |
323 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
324 | } | |
325 | ||
9451a9a5 | 326 | static void |
b57922d9 | 327 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 328 | { |
b57922d9 AV |
329 | truncate_inode_pages(&inode->i_data, 0); |
330 | end_writeback(inode); | |
9451a9a5 SJ |
331 | cifs_fscache_release_inode_cookie(inode); |
332 | } | |
333 | ||
61f98ffd JL |
334 | static void |
335 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
336 | { | |
337 | seq_printf(s, ",addr="); | |
338 | ||
339 | switch (server->addr.sockAddr.sin_family) { | |
340 | case AF_INET: | |
341 | seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr); | |
342 | break; | |
343 | case AF_INET6: | |
344 | seq_printf(s, "%pI6", | |
345 | &server->addr.sockAddr6.sin6_addr.s6_addr); | |
346 | if (server->addr.sockAddr6.sin6_scope_id) | |
347 | seq_printf(s, "%%%u", | |
348 | server->addr.sockAddr6.sin6_scope_id); | |
349 | break; | |
350 | default: | |
351 | seq_printf(s, "(unknown)"); | |
352 | } | |
353 | } | |
354 | ||
1da177e4 LT |
355 | /* |
356 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
357 | * Not all settable options are displayed but most of the important | |
358 | * ones are. | |
359 | */ | |
360 | static int | |
361 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
362 | { | |
8e047d09 JL |
363 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
364 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
8616e0fc | 365 | |
8e047d09 | 366 | seq_printf(s, ",unc=%s", tcon->treeName); |
8616e0fc JL |
367 | if (tcon->ses->userName) |
368 | seq_printf(s, ",username=%s", tcon->ses->userName); | |
369 | if (tcon->ses->domainName) | |
370 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
371 | ||
8616e0fc | 372 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
340481a3 JL |
373 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
374 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
375 | else |
376 | seq_printf(s, ",noforceuid"); | |
340481a3 | 377 | |
8616e0fc | 378 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
340481a3 JL |
379 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
380 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
381 | else |
382 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 383 | |
61f98ffd | 384 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 385 | |
8616e0fc JL |
386 | if (!tcon->unix_ext) |
387 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
2b280fab SF |
388 | cifs_sb->mnt_file_mode, |
389 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
390 | if (tcon->seal) |
391 | seq_printf(s, ",seal"); | |
392 | if (tcon->nocase) | |
393 | seq_printf(s, ",nocase"); | |
394 | if (tcon->retry) | |
395 | seq_printf(s, ",hard"); | |
396 | if (cifs_sb->prepath) | |
397 | seq_printf(s, ",prepath=%s", cifs_sb->prepath); | |
398 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
399 | seq_printf(s, ",posixpaths"); | |
400 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
401 | seq_printf(s, ",setuids"); | |
402 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
403 | seq_printf(s, ",serverino"); | |
404 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
405 | seq_printf(s, ",directio"); | |
406 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
407 | seq_printf(s, ",nouser_xattr"); | |
408 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
409 | seq_printf(s, ",mapchars"); | |
410 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
411 | seq_printf(s, ",sfu"); | |
412 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
413 | seq_printf(s, ",nobrl"); | |
414 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
415 | seq_printf(s, ",cifsacl"); | |
416 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
417 | seq_printf(s, ",dynperm"); | |
418 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
419 | seq_printf(s, ",acl"); | |
420 | ||
421 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
422 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
423 | ||
1da177e4 LT |
424 | return 0; |
425 | } | |
426 | ||
42faad99 | 427 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 428 | { |
42faad99 | 429 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
50c2f753 | 430 | struct cifsTconInfo *tcon; |
68058e75 | 431 | |
4523cc30 | 432 | if (cifs_sb == NULL) |
9e2e85f8 SF |
433 | return; |
434 | ||
435 | tcon = cifs_sb->tcon; | |
4523cc30 | 436 | if (tcon == NULL) |
9e2e85f8 | 437 | return; |
f1987b44 JL |
438 | |
439 | read_lock(&cifs_tcp_ses_lock); | |
ad8034f1 SF |
440 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
441 | /* we have other mounts to same share or we have | |
442 | already tried to force umount this and woken up | |
443 | all waiting network requests, nothing to do */ | |
444 | read_unlock(&cifs_tcp_ses_lock); | |
445 | return; | |
446 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 447 | tcon->tidStatus = CifsExiting; |
f1987b44 | 448 | read_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 449 | |
3a5ff61c | 450 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 451 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 452 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 453 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 454 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
455 | wake_up_all(&tcon->ses->server->response_q); |
456 | msleep(1); /* yield */ | |
457 | /* we have to kick the requests once more */ | |
458 | wake_up_all(&tcon->ses->server->response_q); | |
459 | msleep(1); | |
5e1253b5 | 460 | } |
68058e75 SF |
461 | |
462 | return; | |
463 | } | |
68058e75 | 464 | |
bf97d287 SF |
465 | #ifdef CONFIG_CIFS_STATS2 |
466 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
467 | { | |
468 | /* BB FIXME */ | |
469 | return 0; | |
470 | } | |
471 | #endif | |
472 | ||
1da177e4 LT |
473 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
474 | { | |
475 | *flags |= MS_NODIRATIME; | |
476 | return 0; | |
477 | } | |
478 | ||
45321ac5 | 479 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
480 | { |
481 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
482 | ||
45321ac5 AV |
483 | /* no serverino => unconditional eviction */ |
484 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
485 | generic_drop_inode(inode); | |
12420ac3 JL |
486 | } |
487 | ||
ee9b6d61 | 488 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
489 | .put_super = cifs_put_super, |
490 | .statfs = cifs_statfs, | |
491 | .alloc_inode = cifs_alloc_inode, | |
492 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 493 | .drop_inode = cifs_drop_inode, |
b57922d9 | 494 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
495 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
496 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
497 | kernel forgets to call us with the same number of releases (closes) |
498 | as opens */ | |
1da177e4 | 499 | .show_options = cifs_show_options, |
7b7abfe3 | 500 | .umount_begin = cifs_umount_begin, |
1da177e4 | 501 | .remount_fs = cifs_remount, |
bf97d287 | 502 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 503 | .show_stats = cifs_show_stats, |
bf97d287 | 504 | #endif |
1da177e4 LT |
505 | }; |
506 | ||
454e2398 | 507 | static int |
1da177e4 | 508 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 509 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
510 | { |
511 | int rc; | |
db719222 JB |
512 | struct super_block *sb; |
513 | ||
db719222 | 514 | sb = sget(fs_type, NULL, set_anon_super, NULL); |
1da177e4 | 515 | |
b6b38f70 | 516 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 517 | |
b0991aa3 | 518 | if (IS_ERR(sb)) |
454e2398 | 519 | return PTR_ERR(sb); |
1da177e4 LT |
520 | |
521 | sb->s_flags = flags; | |
522 | ||
9b04c997 | 523 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 | 524 | if (rc) { |
6f5bbff9 | 525 | deactivate_locked_super(sb); |
454e2398 | 526 | return rc; |
1da177e4 LT |
527 | } |
528 | sb->s_flags |= MS_ACTIVE; | |
a3ec947c SB |
529 | simple_set_mnt(mnt, sb); |
530 | return 0; | |
1da177e4 LT |
531 | } |
532 | ||
027445c3 BP |
533 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
534 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 535 | { |
e6a00296 | 536 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
537 | ssize_t written; |
538 | ||
027445c3 | 539 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
540 | if (!CIFS_I(inode)->clientCanCacheAll) |
541 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
542 | return written; |
543 | } | |
544 | ||
c32a0b68 SF |
545 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
546 | { | |
547 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 548 | if (origin == SEEK_END) { |
030e9d81 SF |
549 | int retval; |
550 | ||
551 | /* some applications poll for the file length in this strange | |
552 | way so we must seek to end on non-oplocked files by | |
553 | setting the revalidate time to zero */ | |
c33f8d32 | 554 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 | 555 | |
abab095d | 556 | retval = cifs_revalidate_file(file); |
c32a0b68 SF |
557 | if (retval < 0) |
558 | return (loff_t)retval; | |
559 | } | |
9465efc9 | 560 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
561 | } |
562 | ||
84210e91 SF |
563 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
564 | { | |
b89f4321 AB |
565 | /* note that this is called by vfs setlease with lock_flocks held |
566 | to protect *lease from going away */ | |
84210e91 SF |
567 | struct inode *inode = file->f_path.dentry->d_inode; |
568 | ||
569 | if (!(S_ISREG(inode->i_mode))) | |
570 | return -EINVAL; | |
571 | ||
572 | /* check if file is oplocked */ | |
573 | if (((arg == F_RDLCK) && | |
574 | (CIFS_I(inode)->clientCanCacheRead)) || | |
575 | ((arg == F_WRLCK) && | |
576 | (CIFS_I(inode)->clientCanCacheAll))) | |
577 | return generic_setlease(file, arg, lease); | |
578 | else if (CIFS_SB(inode->i_sb)->tcon->local_lease && | |
579 | !CIFS_I(inode)->clientCanCacheRead) | |
580 | /* If the server claims to support oplock on this | |
581 | file, then we still need to check oplock even | |
582 | if the local_lease mount option is set, but there | |
583 | are servers which do not support oplock for which | |
584 | this mount option may be useful if the user | |
585 | knows that the file won't be changed on the server | |
586 | by anyone else */ | |
587 | return generic_setlease(file, arg, lease); | |
588 | else | |
589 | return -EAGAIN; | |
590 | } | |
84210e91 | 591 | |
e6ab1582 | 592 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
593 | .owner = THIS_MODULE, |
594 | .name = "cifs", | |
595 | .get_sb = cifs_get_sb, | |
596 | .kill_sb = kill_anon_super, | |
597 | /* .fs_flags */ | |
598 | }; | |
754661f1 | 599 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
600 | .create = cifs_create, |
601 | .lookup = cifs_lookup, | |
602 | .getattr = cifs_getattr, | |
603 | .unlink = cifs_unlink, | |
604 | .link = cifs_hardlink, | |
605 | .mkdir = cifs_mkdir, | |
606 | .rmdir = cifs_rmdir, | |
607 | .rename = cifs_rename, | |
608 | .permission = cifs_permission, | |
609 | /* revalidate:cifs_revalidate, */ | |
610 | .setattr = cifs_setattr, | |
611 | .symlink = cifs_symlink, | |
612 | .mknod = cifs_mknod, | |
613 | #ifdef CONFIG_CIFS_XATTR | |
614 | .setxattr = cifs_setxattr, | |
615 | .getxattr = cifs_getxattr, | |
616 | .listxattr = cifs_listxattr, | |
617 | .removexattr = cifs_removexattr, | |
618 | #endif | |
619 | }; | |
620 | ||
754661f1 | 621 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
622 | /* revalidate:cifs_revalidate, */ |
623 | .setattr = cifs_setattr, | |
624 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
625 | .rename = cifs_rename, | |
626 | .permission = cifs_permission, | |
627 | #ifdef CONFIG_CIFS_XATTR | |
628 | .setxattr = cifs_setxattr, | |
629 | .getxattr = cifs_getxattr, | |
630 | .listxattr = cifs_listxattr, | |
631 | .removexattr = cifs_removexattr, | |
50c2f753 | 632 | #endif |
1da177e4 LT |
633 | }; |
634 | ||
754661f1 | 635 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 636 | .readlink = generic_readlink, |
1da177e4 LT |
637 | .follow_link = cifs_follow_link, |
638 | .put_link = cifs_put_link, | |
639 | .permission = cifs_permission, | |
640 | /* BB add the following two eventually */ | |
641 | /* revalidate: cifs_revalidate, | |
642 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
643 | #ifdef CONFIG_CIFS_XATTR | |
644 | .setxattr = cifs_setxattr, | |
645 | .getxattr = cifs_getxattr, | |
646 | .listxattr = cifs_listxattr, | |
647 | .removexattr = cifs_removexattr, | |
50c2f753 | 648 | #endif |
1da177e4 LT |
649 | }; |
650 | ||
4b6f5d20 | 651 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
652 | .read = do_sync_read, |
653 | .write = do_sync_write, | |
87c89dd7 SF |
654 | .aio_read = generic_file_aio_read, |
655 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
656 | .open = cifs_open, |
657 | .release = cifs_close, | |
658 | .lock = cifs_lock, | |
659 | .fsync = cifs_fsync, | |
660 | .flush = cifs_flush, | |
661 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 662 | .splice_read = generic_file_splice_read, |
c32a0b68 | 663 | .llseek = cifs_llseek, |
c67593a0 | 664 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 665 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 666 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 667 | .setlease = cifs_setlease, |
1da177e4 LT |
668 | }; |
669 | ||
4b6f5d20 | 670 | const struct file_operations cifs_file_direct_ops = { |
a994b8fa | 671 | /* no aio, no readv - |
1da177e4 LT |
672 | BB reevaluate whether they can be done with directio, no cache */ |
673 | .read = cifs_user_read, | |
674 | .write = cifs_user_write, | |
675 | .open = cifs_open, | |
676 | .release = cifs_close, | |
677 | .lock = cifs_lock, | |
678 | .fsync = cifs_fsync, | |
679 | .flush = cifs_flush, | |
a994b8fa | 680 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 681 | .splice_read = generic_file_splice_read, |
c67593a0 | 682 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 683 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 684 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 685 | .llseek = cifs_llseek, |
84210e91 | 686 | .setlease = cifs_setlease, |
1da177e4 | 687 | }; |
4b6f5d20 | 688 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
689 | .read = do_sync_read, |
690 | .write = do_sync_write, | |
87c89dd7 SF |
691 | .aio_read = generic_file_aio_read, |
692 | .aio_write = cifs_file_aio_write, | |
693 | .open = cifs_open, | |
694 | .release = cifs_close, | |
695 | .fsync = cifs_fsync, | |
696 | .flush = cifs_flush, | |
697 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 698 | .splice_read = generic_file_splice_read, |
c32a0b68 | 699 | .llseek = cifs_llseek, |
8b94bcb9 | 700 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 701 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 702 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 703 | .setlease = cifs_setlease, |
8b94bcb9 SF |
704 | }; |
705 | ||
4b6f5d20 | 706 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 707 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
708 | BB reevaluate whether they can be done with directio, no cache */ |
709 | .read = cifs_user_read, | |
710 | .write = cifs_user_write, | |
711 | .open = cifs_open, | |
712 | .release = cifs_close, | |
713 | .fsync = cifs_fsync, | |
714 | .flush = cifs_flush, | |
810627a0 | 715 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 716 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 717 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 718 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 719 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 720 | .llseek = cifs_llseek, |
84210e91 | 721 | .setlease = cifs_setlease, |
8b94bcb9 | 722 | }; |
1da177e4 | 723 | |
4b6f5d20 | 724 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
725 | .readdir = cifs_readdir, |
726 | .release = cifs_closedir, | |
727 | .read = generic_read_dir, | |
f9ddcca4 | 728 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 729 | .llseek = generic_file_llseek, |
1da177e4 LT |
730 | }; |
731 | ||
732 | static void | |
51cc5068 | 733 | cifs_init_once(void *inode) |
1da177e4 LT |
734 | { |
735 | struct cifsInodeInfo *cifsi = inode; | |
736 | ||
a35afb83 CL |
737 | inode_init_once(&cifsi->vfs_inode); |
738 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
739 | } |
740 | ||
741 | static int | |
742 | cifs_init_inodecache(void) | |
743 | { | |
744 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 745 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
746 | 0, (SLAB_RECLAIM_ACCOUNT| |
747 | SLAB_MEM_SPREAD), | |
20c2df83 | 748 | cifs_init_once); |
1da177e4 LT |
749 | if (cifs_inode_cachep == NULL) |
750 | return -ENOMEM; | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | static void | |
756 | cifs_destroy_inodecache(void) | |
757 | { | |
1a1d92c1 | 758 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
759 | } |
760 | ||
761 | static int | |
762 | cifs_init_request_bufs(void) | |
763 | { | |
4523cc30 | 764 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
765 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
766 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
767 | CIFSMaxBufSize = 8192; | |
768 | } else if (CIFSMaxBufSize > 1024*127) { | |
769 | CIFSMaxBufSize = 1024 * 127; | |
770 | } else { | |
771 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
772 | } | |
b6b38f70 | 773 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 LT |
774 | cifs_req_cachep = kmem_cache_create("cifs_request", |
775 | CIFSMaxBufSize + | |
776 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 777 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
778 | if (cifs_req_cachep == NULL) |
779 | return -ENOMEM; | |
780 | ||
4523cc30 | 781 | if (cifs_min_rcv < 1) |
1da177e4 LT |
782 | cifs_min_rcv = 1; |
783 | else if (cifs_min_rcv > 64) { | |
784 | cifs_min_rcv = 64; | |
b6b38f70 | 785 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
786 | } |
787 | ||
93d2341c MD |
788 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
789 | cifs_req_cachep); | |
1da177e4 | 790 | |
4523cc30 | 791 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
792 | kmem_cache_destroy(cifs_req_cachep); |
793 | return -ENOMEM; | |
794 | } | |
ec637e3f | 795 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
796 | almost all handle based requests (but not write response, nor is it |
797 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 798 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
799 | for the case in which debug was on, but this larger size allows |
800 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 801 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
802 | alloc of large cifs buffers even when page debugging is on */ |
803 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 804 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 805 | NULL); |
1da177e4 LT |
806 | if (cifs_sm_req_cachep == NULL) { |
807 | mempool_destroy(cifs_req_poolp); | |
808 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 809 | return -ENOMEM; |
1da177e4 LT |
810 | } |
811 | ||
4523cc30 | 812 | if (cifs_min_small < 2) |
1da177e4 LT |
813 | cifs_min_small = 2; |
814 | else if (cifs_min_small > 256) { | |
815 | cifs_min_small = 256; | |
b6b38f70 | 816 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
817 | } |
818 | ||
93d2341c MD |
819 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
820 | cifs_sm_req_cachep); | |
1da177e4 | 821 | |
4523cc30 | 822 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
823 | mempool_destroy(cifs_req_poolp); |
824 | kmem_cache_destroy(cifs_req_cachep); | |
825 | kmem_cache_destroy(cifs_sm_req_cachep); | |
826 | return -ENOMEM; | |
827 | } | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
832 | static void | |
833 | cifs_destroy_request_bufs(void) | |
834 | { | |
835 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 836 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 837 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 838 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
839 | } |
840 | ||
841 | static int | |
842 | cifs_init_mids(void) | |
843 | { | |
844 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
845 | sizeof(struct mid_q_entry), 0, |
846 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
847 | if (cifs_mid_cachep == NULL) |
848 | return -ENOMEM; | |
849 | ||
93d2341c MD |
850 | /* 3 is a reasonable minimum number of simultaneous operations */ |
851 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 852 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
853 | kmem_cache_destroy(cifs_mid_cachep); |
854 | return -ENOMEM; | |
855 | } | |
856 | ||
1da177e4 LT |
857 | return 0; |
858 | } | |
859 | ||
860 | static void | |
861 | cifs_destroy_mids(void) | |
862 | { | |
863 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 864 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
865 | } |
866 | ||
1da177e4 LT |
867 | static int __init |
868 | init_cifs(void) | |
869 | { | |
870 | int rc = 0; | |
1da177e4 | 871 | cifs_proc_init(); |
e7ddee90 | 872 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
4ca9c190 SF |
873 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
874 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
875 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 876 | #endif |
1da177e4 LT |
877 | /* |
878 | * Initialize Global counters | |
879 | */ | |
880 | atomic_set(&sesInfoAllocCount, 0); | |
881 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 882 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
883 | atomic_set(&tcpSesReconnectCount, 0); |
884 | atomic_set(&tconInfoReconnectCount, 0); | |
885 | ||
886 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
887 | atomic_set(&smBufAllocCount, 0); |
888 | #ifdef CONFIG_CIFS_STATS2 | |
889 | atomic_set(&totBufAllocCount, 0); | |
890 | atomic_set(&totSmBufAllocCount, 0); | |
891 | #endif /* CONFIG_CIFS_STATS2 */ | |
892 | ||
1da177e4 LT |
893 | atomic_set(&midCount, 0); |
894 | GlobalCurrentXid = 0; | |
895 | GlobalTotalActiveXid = 0; | |
896 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 897 | memset(Local_System_Name, 0, 15); |
1da177e4 | 898 | rwlock_init(&GlobalSMBSeslock); |
e7ddee90 | 899 | rwlock_init(&cifs_tcp_ses_lock); |
1da177e4 LT |
900 | spin_lock_init(&GlobalMid_Lock); |
901 | ||
4523cc30 | 902 | if (cifs_max_pending < 2) { |
1da177e4 | 903 | cifs_max_pending = 2; |
b6b38f70 | 904 | cFYI(1, "cifs_max_pending set to min of 2"); |
4523cc30 | 905 | } else if (cifs_max_pending > 256) { |
1da177e4 | 906 | cifs_max_pending = 256; |
b6b38f70 | 907 | cFYI(1, "cifs_max_pending set to max of 256"); |
1da177e4 LT |
908 | } |
909 | ||
f579cf3c SJ |
910 | rc = cifs_fscache_register(); |
911 | if (rc) | |
912 | goto out; | |
913 | ||
1da177e4 | 914 | rc = cifs_init_inodecache(); |
45af7a0f SF |
915 | if (rc) |
916 | goto out_clean_proc; | |
917 | ||
918 | rc = cifs_init_mids(); | |
919 | if (rc) | |
920 | goto out_destroy_inodecache; | |
921 | ||
922 | rc = cifs_init_request_bufs(); | |
923 | if (rc) | |
924 | goto out_destroy_mids; | |
925 | ||
926 | rc = register_filesystem(&cifs_fs_type); | |
927 | if (rc) | |
928 | goto out_destroy_request_bufs; | |
84a15b93 JL |
929 | #ifdef CONFIG_CIFS_UPCALL |
930 | rc = register_key_type(&cifs_spnego_key_type); | |
931 | if (rc) | |
932 | goto out_unregister_filesystem; | |
6103335d | 933 | #endif |
45af7a0f | 934 | |
45af7a0f SF |
935 | return 0; |
936 | ||
84a15b93 | 937 | #ifdef CONFIG_CIFS_UPCALL |
45af7a0f SF |
938 | out_unregister_filesystem: |
939 | unregister_filesystem(&cifs_fs_type); | |
1fc7995d | 940 | #endif |
45af7a0f SF |
941 | out_destroy_request_bufs: |
942 | cifs_destroy_request_bufs(); | |
943 | out_destroy_mids: | |
944 | cifs_destroy_mids(); | |
945 | out_destroy_inodecache: | |
946 | cifs_destroy_inodecache(); | |
947 | out_clean_proc: | |
1da177e4 | 948 | cifs_proc_clean(); |
f579cf3c SJ |
949 | cifs_fscache_unregister(); |
950 | out: | |
1da177e4 LT |
951 | return rc; |
952 | } | |
953 | ||
954 | static void __exit | |
955 | exit_cifs(void) | |
956 | { | |
b6b38f70 | 957 | cFYI(DBG2, "exit_cifs"); |
1da177e4 | 958 | cifs_proc_clean(); |
f579cf3c | 959 | cifs_fscache_unregister(); |
6103335d | 960 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 961 | cifs_dfs_release_automount_timer(); |
6103335d | 962 | #endif |
84a15b93 JL |
963 | #ifdef CONFIG_CIFS_UPCALL |
964 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
965 | #endif |
966 | unregister_filesystem(&cifs_fs_type); | |
967 | cifs_destroy_inodecache(); | |
968 | cifs_destroy_mids(); | |
969 | cifs_destroy_request_bufs(); | |
1da177e4 LT |
970 | } |
971 | ||
972 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 973 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 974 | MODULE_DESCRIPTION |
63135e08 SF |
975 | ("VFS to access servers complying with the SNIA CIFS Specification " |
976 | "e.g. Samba and Windows"); | |
1da177e4 LT |
977 | MODULE_VERSION(CIFS_VERSION); |
978 | module_init(init_cifs) | |
979 | module_exit(exit_cifs) |