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> |
3eb9a889 | 38 | #include <net/ipv6.h> |
1da177e4 LT |
39 | #include "cifsfs.h" |
40 | #include "cifspdu.h" | |
41 | #define DECLARE_GLOBALS_HERE | |
42 | #include "cifsglob.h" | |
43 | #include "cifsproto.h" | |
44 | #include "cifs_debug.h" | |
45 | #include "cifs_fs_sb.h" | |
46 | #include <linux/mm.h> | |
84a15b93 | 47 | #include <linux/key-type.h> |
e545937a | 48 | #include "cifs_spnego.h" |
f579cf3c | 49 | #include "fscache.h" |
1da177e4 LT |
50 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
51 | ||
1da177e4 LT |
52 | int cifsFYI = 0; |
53 | int cifsERROR = 1; | |
54 | int traceSMB = 0; | |
55 | unsigned int oplockEnabled = 1; | |
56 | unsigned int experimEnabled = 0; | |
57 | unsigned int linuxExtEnabled = 1; | |
58 | unsigned int lookupCacheEnabled = 1; | |
59 | unsigned int multiuser_mount = 0; | |
04912d6a | 60 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 61 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 62 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 63 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
64 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
65 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
66 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
67 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
68 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
69 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
70 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
71 | "1 to 64"); | |
1da177e4 LT |
72 | unsigned int cifs_min_small = 30; |
73 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
74 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
75 | "Range: 2 to 256"); | |
1da177e4 LT |
76 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
77 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
78 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
79 | "Default: 50 Range: 2 to 256"); | |
1da177e4 | 80 | |
1da177e4 LT |
81 | extern mempool_t *cifs_sm_req_poolp; |
82 | extern mempool_t *cifs_req_poolp; | |
83 | extern mempool_t *cifs_mid_poolp; | |
84 | ||
d7c86ff8 JL |
85 | void |
86 | cifs_sb_active(struct super_block *sb) | |
87 | { | |
88 | struct cifs_sb_info *server = CIFS_SB(sb); | |
89 | ||
90 | if (atomic_inc_return(&server->active) == 1) | |
91 | atomic_inc(&sb->s_active); | |
92 | } | |
93 | ||
94 | void | |
95 | cifs_sb_deactive(struct super_block *sb) | |
96 | { | |
97 | struct cifs_sb_info *server = CIFS_SB(sb); | |
98 | ||
99 | if (atomic_dec_and_test(&server->active)) | |
100 | deactivate_super(sb); | |
101 | } | |
102 | ||
1da177e4 LT |
103 | static int |
104 | cifs_read_super(struct super_block *sb, void *data, | |
105 | const char *devname, int silent) | |
106 | { | |
107 | struct inode *inode; | |
108 | struct cifs_sb_info *cifs_sb; | |
109 | int rc = 0; | |
50c2f753 | 110 | |
1b2b2126 SF |
111 | /* BB should we make this contingent on mount parm? */ |
112 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 113 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 114 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 115 | if (cifs_sb == NULL) |
1da177e4 | 116 | return -ENOMEM; |
1da177e4 | 117 | |
0dd12c21 | 118 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
b647c35f | 119 | cifs_sb->tlink_tree = RB_ROOT; |
0dd12c21 | 120 | |
8044f7f4 JA |
121 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); |
122 | if (rc) { | |
123 | kfree(cifs_sb); | |
124 | return rc; | |
125 | } | |
126 | ||
e6ab1582 IM |
127 | #ifdef CONFIG_CIFS_DFS_UPCALL |
128 | /* copy mount params to sb for use in submounts */ | |
129 | /* BB: should we move this after the mount so we | |
130 | * do not have to do the copy on failed mounts? | |
131 | * BB: May be it is better to do simple copy before | |
132 | * complex operation (mount), and in case of fail | |
133 | * just exit instead of doing mount and attempting | |
134 | * undo it if this copy fails?*/ | |
79ee9a8b SF |
135 | if (data) { |
136 | int len = strlen(data); | |
137 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
138 | if (cifs_sb->mountdata == NULL) { | |
8044f7f4 | 139 | bdi_destroy(&cifs_sb->bdi); |
79ee9a8b SF |
140 | kfree(sb->s_fs_info); |
141 | sb->s_fs_info = NULL; | |
142 | return -ENOMEM; | |
143 | } | |
144 | strncpy(cifs_sb->mountdata, data, len + 1); | |
145 | cifs_sb->mountdata[len] = '\0'; | |
e6ab1582 | 146 | } |
e6ab1582 IM |
147 | #endif |
148 | ||
1da177e4 LT |
149 | rc = cifs_mount(sb, cifs_sb, data, devname); |
150 | ||
151 | if (rc) { | |
152 | if (!silent) | |
b6b38f70 | 153 | cERROR(1, "cifs_mount failed w/return code = %d", rc); |
1da177e4 LT |
154 | goto out_mount_failed; |
155 | } | |
156 | ||
157 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
158 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 159 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
160 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
161 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
bd433d4c | 162 | inode = cifs_root_iget(sb, ROOT_I); |
1da177e4 | 163 | |
ce634ab2 DH |
164 | if (IS_ERR(inode)) { |
165 | rc = PTR_ERR(inode); | |
166 | inode = NULL; | |
1da177e4 LT |
167 | goto out_no_root; |
168 | } | |
169 | ||
170 | sb->s_root = d_alloc_root(inode); | |
171 | ||
172 | if (!sb->s_root) { | |
173 | rc = -ENOMEM; | |
174 | goto out_no_root; | |
175 | } | |
50c2f753 | 176 | |
1c929cfe AV |
177 | /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ |
178 | if (cifs_sb_master_tcon(cifs_sb)->nocase) | |
179 | sb->s_d_op = &cifs_ci_dentry_ops; | |
180 | else | |
181 | sb->s_d_op = &cifs_dentry_ops; | |
182 | ||
7521a3c5 SF |
183 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
184 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
b6b38f70 | 185 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
186 | sb->s_export_op = &cifs_export_ops; |
187 | } | |
188 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
189 | |
190 | return 0; | |
191 | ||
192 | out_no_root: | |
b6b38f70 | 193 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
194 | if (inode) |
195 | iput(inode); | |
54b4602d | 196 | |
2c731afb | 197 | cifs_umount(sb, cifs_sb); |
1da177e4 LT |
198 | |
199 | out_mount_failed: | |
4523cc30 | 200 | if (cifs_sb) { |
e6ab1582 IM |
201 | #ifdef CONFIG_CIFS_DFS_UPCALL |
202 | if (cifs_sb->mountdata) { | |
203 | kfree(cifs_sb->mountdata); | |
204 | cifs_sb->mountdata = NULL; | |
205 | } | |
206 | #endif | |
6d729e44 | 207 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 208 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 LT |
209 | kfree(cifs_sb); |
210 | } | |
211 | return rc; | |
212 | } | |
213 | ||
214 | static void | |
215 | cifs_put_super(struct super_block *sb) | |
216 | { | |
217 | int rc = 0; | |
218 | struct cifs_sb_info *cifs_sb; | |
219 | ||
b6b38f70 | 220 | cFYI(1, "In cifs_put_super"); |
1da177e4 | 221 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 222 | if (cifs_sb == NULL) { |
b6b38f70 | 223 | cFYI(1, "Empty cifs superblock info passed to unmount"); |
1da177e4 LT |
224 | return; |
225 | } | |
6cfd0148 | 226 | |
790fe579 | 227 | rc = cifs_umount(sb, cifs_sb); |
ad7a2926 | 228 | if (rc) |
b6b38f70 | 229 | cERROR(1, "cifs_umount failed with return code %d", rc); |
e6ab1582 IM |
230 | #ifdef CONFIG_CIFS_DFS_UPCALL |
231 | if (cifs_sb->mountdata) { | |
232 | kfree(cifs_sb->mountdata); | |
233 | cifs_sb->mountdata = NULL; | |
234 | } | |
235 | #endif | |
236 | ||
1da177e4 | 237 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 238 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 | 239 | kfree(cifs_sb); |
1da177e4 LT |
240 | } |
241 | ||
242 | static int | |
726c3342 | 243 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 244 | { |
726c3342 | 245 | struct super_block *sb = dentry->d_sb; |
39da9847 | 246 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0d424ad0 | 247 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); |
c81156dd | 248 | int rc = -EOPNOTSUPP; |
39da9847 | 249 | int xid; |
1da177e4 LT |
250 | |
251 | xid = GetXid(); | |
252 | ||
1da177e4 LT |
253 | buf->f_type = CIFS_MAGIC_NUMBER; |
254 | ||
39da9847 SF |
255 | /* |
256 | * PATH_MAX may be too long - it would presumably be total path, | |
257 | * but note that some servers (includinng Samba 3) have a shorter | |
258 | * maximum path. | |
259 | * | |
260 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
261 | */ | |
262 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
263 | buf->f_files = 0; /* undefined */ |
264 | buf->f_ffree = 0; /* unlimited */ | |
265 | ||
39da9847 SF |
266 | /* |
267 | * We could add a second check for a QFS Unix capability bit | |
268 | */ | |
269 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
270 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
271 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
272 | ||
273 | /* | |
274 | * Only need to call the old QFSInfo if failed on newer one, | |
275 | * e.g. by OS/2. | |
276 | **/ | |
277 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
278 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
279 | ||
280 | /* | |
281 | * Some old Windows servers also do not support level 103, retry with | |
282 | * older level one if old server failed the previous call or we | |
283 | * bypassed it because we detected that this was an older LANMAN sess | |
284 | */ | |
4523cc30 | 285 | if (rc) |
39da9847 SF |
286 | rc = SMBOldQFSInfo(xid, tcon, buf); |
287 | ||
1da177e4 | 288 | FreeXid(xid); |
39da9847 | 289 | return 0; |
1da177e4 LT |
290 | } |
291 | ||
b74c79e9 | 292 | static int cifs_permission(struct inode *inode, int mask, unsigned int flags) |
1da177e4 LT |
293 | { |
294 | struct cifs_sb_info *cifs_sb; | |
295 | ||
b74c79e9 NP |
296 | if (flags & IPERM_FLAG_RCU) |
297 | return -ECHILD; | |
298 | ||
1da177e4 LT |
299 | cifs_sb = CIFS_SB(inode->i_sb); |
300 | ||
f696a365 MS |
301 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
302 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
303 | return -EACCES; | |
304 | else | |
305 | return 0; | |
306 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 307 | on the client (above and beyond ACL on servers) for |
1da177e4 | 308 | servers which do not support setting and viewing mode bits, |
50c2f753 | 309 | so allowing client to check permissions is useful */ |
b74c79e9 | 310 | return generic_permission(inode, mask, flags, NULL); |
1da177e4 LT |
311 | } |
312 | ||
e18b890b CL |
313 | static struct kmem_cache *cifs_inode_cachep; |
314 | static struct kmem_cache *cifs_req_cachep; | |
315 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 316 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
317 | mempool_t *cifs_sm_req_poolp; |
318 | mempool_t *cifs_req_poolp; | |
319 | mempool_t *cifs_mid_poolp; | |
320 | ||
321 | static struct inode * | |
322 | cifs_alloc_inode(struct super_block *sb) | |
323 | { | |
324 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 325 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
326 | if (!cifs_inode) |
327 | return NULL; | |
328 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 LT |
329 | cifs_inode->time = 0; |
330 | /* Until the file is open and we have gotten oplock | |
331 | info back from the server, can not assume caching of | |
332 | file data or metadata */ | |
c6723628 | 333 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 334 | cifs_inode->delete_pending = false; |
df2cf170 | 335 | cifs_inode->invalid_mapping = false; |
1da177e4 | 336 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 337 | cifs_inode->server_eof = 0; |
20054bd6 JL |
338 | cifs_inode->uniqueid = 0; |
339 | cifs_inode->createtime = 0; | |
50c2f753 | 340 | |
1b2b2126 SF |
341 | /* Can not set i_flags here - they get immediately overwritten |
342 | to zero by the VFS */ | |
343 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
344 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
345 | return &cifs_inode->vfs_inode; | |
346 | } | |
347 | ||
fa0d7e3d NP |
348 | static void cifs_i_callback(struct rcu_head *head) |
349 | { | |
350 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
351 | INIT_LIST_HEAD(&inode->i_dentry); | |
352 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
353 | } | |
354 | ||
1da177e4 LT |
355 | static void |
356 | cifs_destroy_inode(struct inode *inode) | |
357 | { | |
fa0d7e3d | 358 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
359 | } |
360 | ||
9451a9a5 | 361 | static void |
b57922d9 | 362 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 363 | { |
b57922d9 AV |
364 | truncate_inode_pages(&inode->i_data, 0); |
365 | end_writeback(inode); | |
9451a9a5 SJ |
366 | cifs_fscache_release_inode_cookie(inode); |
367 | } | |
368 | ||
61f98ffd JL |
369 | static void |
370 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
371 | { | |
a9f1b85e PS |
372 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
373 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
374 | ||
61f98ffd JL |
375 | seq_printf(s, ",addr="); |
376 | ||
a9f1b85e | 377 | switch (server->dstaddr.ss_family) { |
61f98ffd | 378 | case AF_INET: |
a9f1b85e | 379 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
380 | break; |
381 | case AF_INET6: | |
a9f1b85e PS |
382 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
383 | if (sa6->sin6_scope_id) | |
384 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
385 | break; |
386 | default: | |
387 | seq_printf(s, "(unknown)"); | |
388 | } | |
389 | } | |
390 | ||
1da177e4 LT |
391 | /* |
392 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
393 | * Not all settable options are displayed but most of the important | |
394 | * ones are. | |
395 | */ | |
396 | static int | |
397 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
398 | { | |
8e047d09 | 399 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
0d424ad0 | 400 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
401 | struct sockaddr *srcaddr; |
402 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 403 | |
8e047d09 | 404 | seq_printf(s, ",unc=%s", tcon->treeName); |
29e07c82 JL |
405 | |
406 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
407 | seq_printf(s, ",multiuser"); | |
408 | else if (tcon->ses->userName) | |
8616e0fc | 409 | seq_printf(s, ",username=%s", tcon->ses->userName); |
29e07c82 | 410 | |
8616e0fc JL |
411 | if (tcon->ses->domainName) |
412 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
413 | ||
3eb9a889 BG |
414 | if (srcaddr->sa_family != AF_UNSPEC) { |
415 | struct sockaddr_in *saddr4; | |
416 | struct sockaddr_in6 *saddr6; | |
417 | saddr4 = (struct sockaddr_in *)srcaddr; | |
418 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
419 | if (srcaddr->sa_family == AF_INET6) | |
420 | seq_printf(s, ",srcaddr=%pI6c", | |
421 | &saddr6->sin6_addr); | |
422 | else if (srcaddr->sa_family == AF_INET) | |
423 | seq_printf(s, ",srcaddr=%pI4", | |
424 | &saddr4->sin_addr.s_addr); | |
425 | else | |
426 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
427 | (int)(srcaddr->sa_family)); | |
428 | } | |
429 | ||
8616e0fc | 430 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
340481a3 JL |
431 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
432 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
433 | else |
434 | seq_printf(s, ",noforceuid"); | |
340481a3 | 435 | |
8616e0fc | 436 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
340481a3 JL |
437 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
438 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
439 | else |
440 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 441 | |
61f98ffd | 442 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 443 | |
8616e0fc JL |
444 | if (!tcon->unix_ext) |
445 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
2b280fab SF |
446 | cifs_sb->mnt_file_mode, |
447 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
448 | if (tcon->seal) |
449 | seq_printf(s, ",seal"); | |
450 | if (tcon->nocase) | |
451 | seq_printf(s, ",nocase"); | |
452 | if (tcon->retry) | |
453 | seq_printf(s, ",hard"); | |
454 | if (cifs_sb->prepath) | |
455 | seq_printf(s, ",prepath=%s", cifs_sb->prepath); | |
456 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
457 | seq_printf(s, ",posixpaths"); | |
458 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
459 | seq_printf(s, ",setuids"); | |
460 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
461 | seq_printf(s, ",serverino"); | |
462 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
463 | seq_printf(s, ",directio"); | |
464 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
465 | seq_printf(s, ",nouser_xattr"); | |
466 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
467 | seq_printf(s, ",mapchars"); | |
468 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
469 | seq_printf(s, ",sfu"); | |
470 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
471 | seq_printf(s, ",nobrl"); | |
472 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
473 | seq_printf(s, ",cifsacl"); | |
474 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
475 | seq_printf(s, ",dynperm"); | |
476 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
477 | seq_printf(s, ",acl"); | |
736a3320 SM |
478 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
479 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
480 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
481 | seq_printf(s, ",fsc"); | |
8616e0fc JL |
482 | |
483 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
484 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
6d20e840 SJ |
485 | /* convert actimeo and display it in seconds */ |
486 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); | |
8616e0fc | 487 | |
1da177e4 LT |
488 | return 0; |
489 | } | |
490 | ||
42faad99 | 491 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 492 | { |
42faad99 | 493 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
50c2f753 | 494 | struct cifsTconInfo *tcon; |
68058e75 | 495 | |
4523cc30 | 496 | if (cifs_sb == NULL) |
9e2e85f8 SF |
497 | return; |
498 | ||
0d424ad0 | 499 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 500 | |
3f9bcca7 | 501 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
502 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
503 | /* we have other mounts to same share or we have | |
504 | already tried to force umount this and woken up | |
505 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 506 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
507 | return; |
508 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 509 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 510 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 511 | |
3a5ff61c | 512 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 513 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 514 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 515 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 516 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
517 | wake_up_all(&tcon->ses->server->response_q); |
518 | msleep(1); /* yield */ | |
519 | /* we have to kick the requests once more */ | |
520 | wake_up_all(&tcon->ses->server->response_q); | |
521 | msleep(1); | |
5e1253b5 | 522 | } |
68058e75 SF |
523 | |
524 | return; | |
525 | } | |
68058e75 | 526 | |
bf97d287 SF |
527 | #ifdef CONFIG_CIFS_STATS2 |
528 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
529 | { | |
530 | /* BB FIXME */ | |
531 | return 0; | |
532 | } | |
533 | #endif | |
534 | ||
1da177e4 LT |
535 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
536 | { | |
537 | *flags |= MS_NODIRATIME; | |
538 | return 0; | |
539 | } | |
540 | ||
45321ac5 | 541 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
542 | { |
543 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
544 | ||
45321ac5 AV |
545 | /* no serverino => unconditional eviction */ |
546 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
547 | generic_drop_inode(inode); | |
12420ac3 JL |
548 | } |
549 | ||
ee9b6d61 | 550 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
551 | .put_super = cifs_put_super, |
552 | .statfs = cifs_statfs, | |
553 | .alloc_inode = cifs_alloc_inode, | |
554 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 555 | .drop_inode = cifs_drop_inode, |
b57922d9 | 556 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
557 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
558 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
559 | kernel forgets to call us with the same number of releases (closes) |
560 | as opens */ | |
1da177e4 | 561 | .show_options = cifs_show_options, |
7b7abfe3 | 562 | .umount_begin = cifs_umount_begin, |
1da177e4 | 563 | .remount_fs = cifs_remount, |
bf97d287 | 564 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 565 | .show_stats = cifs_show_stats, |
bf97d287 | 566 | #endif |
1da177e4 LT |
567 | }; |
568 | ||
d753ed97 AV |
569 | static struct dentry * |
570 | cifs_do_mount(struct file_system_type *fs_type, | |
571 | int flags, const char *dev_name, void *data) | |
1da177e4 LT |
572 | { |
573 | int rc; | |
db719222 JB |
574 | struct super_block *sb; |
575 | ||
db719222 | 576 | sb = sget(fs_type, NULL, set_anon_super, NULL); |
1da177e4 | 577 | |
b6b38f70 | 578 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 579 | |
b0991aa3 | 580 | if (IS_ERR(sb)) |
d753ed97 | 581 | return ERR_CAST(sb); |
1da177e4 LT |
582 | |
583 | sb->s_flags = flags; | |
584 | ||
9b04c997 | 585 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 | 586 | if (rc) { |
6f5bbff9 | 587 | deactivate_locked_super(sb); |
d753ed97 | 588 | return ERR_PTR(rc); |
1da177e4 LT |
589 | } |
590 | sb->s_flags |= MS_ACTIVE; | |
d753ed97 | 591 | return dget(sb->s_root); |
1da177e4 LT |
592 | } |
593 | ||
027445c3 BP |
594 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
595 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 596 | { |
e6a00296 | 597 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
598 | ssize_t written; |
599 | ||
027445c3 | 600 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
601 | if (!CIFS_I(inode)->clientCanCacheAll) |
602 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
603 | return written; |
604 | } | |
605 | ||
c32a0b68 SF |
606 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
607 | { | |
608 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 609 | if (origin == SEEK_END) { |
030e9d81 SF |
610 | int retval; |
611 | ||
612 | /* some applications poll for the file length in this strange | |
613 | way so we must seek to end on non-oplocked files by | |
614 | setting the revalidate time to zero */ | |
c33f8d32 | 615 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 | 616 | |
abab095d | 617 | retval = cifs_revalidate_file(file); |
c32a0b68 SF |
618 | if (retval < 0) |
619 | return (loff_t)retval; | |
620 | } | |
9465efc9 | 621 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
622 | } |
623 | ||
84210e91 SF |
624 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
625 | { | |
b89f4321 AB |
626 | /* note that this is called by vfs setlease with lock_flocks held |
627 | to protect *lease from going away */ | |
84210e91 | 628 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 629 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
630 | |
631 | if (!(S_ISREG(inode->i_mode))) | |
632 | return -EINVAL; | |
633 | ||
634 | /* check if file is oplocked */ | |
635 | if (((arg == F_RDLCK) && | |
636 | (CIFS_I(inode)->clientCanCacheRead)) || | |
637 | ((arg == F_WRLCK) && | |
638 | (CIFS_I(inode)->clientCanCacheAll))) | |
639 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
640 | else if (tlink_tcon(cfile->tlink)->local_lease && |
641 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
642 | /* If the server claims to support oplock on this |
643 | file, then we still need to check oplock even | |
644 | if the local_lease mount option is set, but there | |
645 | are servers which do not support oplock for which | |
646 | this mount option may be useful if the user | |
647 | knows that the file won't be changed on the server | |
648 | by anyone else */ | |
649 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 650 | else |
84210e91 SF |
651 | return -EAGAIN; |
652 | } | |
84210e91 | 653 | |
e6ab1582 | 654 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
655 | .owner = THIS_MODULE, |
656 | .name = "cifs", | |
d753ed97 | 657 | .mount = cifs_do_mount, |
1da177e4 LT |
658 | .kill_sb = kill_anon_super, |
659 | /* .fs_flags */ | |
660 | }; | |
754661f1 | 661 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
662 | .create = cifs_create, |
663 | .lookup = cifs_lookup, | |
664 | .getattr = cifs_getattr, | |
665 | .unlink = cifs_unlink, | |
666 | .link = cifs_hardlink, | |
667 | .mkdir = cifs_mkdir, | |
668 | .rmdir = cifs_rmdir, | |
669 | .rename = cifs_rename, | |
670 | .permission = cifs_permission, | |
671 | /* revalidate:cifs_revalidate, */ | |
672 | .setattr = cifs_setattr, | |
673 | .symlink = cifs_symlink, | |
674 | .mknod = cifs_mknod, | |
675 | #ifdef CONFIG_CIFS_XATTR | |
676 | .setxattr = cifs_setxattr, | |
677 | .getxattr = cifs_getxattr, | |
678 | .listxattr = cifs_listxattr, | |
679 | .removexattr = cifs_removexattr, | |
680 | #endif | |
681 | }; | |
682 | ||
754661f1 | 683 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
684 | /* revalidate:cifs_revalidate, */ |
685 | .setattr = cifs_setattr, | |
686 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
687 | .rename = cifs_rename, | |
688 | .permission = cifs_permission, | |
689 | #ifdef CONFIG_CIFS_XATTR | |
690 | .setxattr = cifs_setxattr, | |
691 | .getxattr = cifs_getxattr, | |
692 | .listxattr = cifs_listxattr, | |
693 | .removexattr = cifs_removexattr, | |
50c2f753 | 694 | #endif |
1da177e4 LT |
695 | }; |
696 | ||
754661f1 | 697 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 698 | .readlink = generic_readlink, |
1da177e4 LT |
699 | .follow_link = cifs_follow_link, |
700 | .put_link = cifs_put_link, | |
701 | .permission = cifs_permission, | |
702 | /* BB add the following two eventually */ | |
703 | /* revalidate: cifs_revalidate, | |
704 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
705 | #ifdef CONFIG_CIFS_XATTR | |
706 | .setxattr = cifs_setxattr, | |
707 | .getxattr = cifs_getxattr, | |
708 | .listxattr = cifs_listxattr, | |
709 | .removexattr = cifs_removexattr, | |
50c2f753 | 710 | #endif |
1da177e4 LT |
711 | }; |
712 | ||
4b6f5d20 | 713 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
714 | .read = do_sync_read, |
715 | .write = do_sync_write, | |
87c89dd7 SF |
716 | .aio_read = generic_file_aio_read, |
717 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
718 | .open = cifs_open, |
719 | .release = cifs_close, | |
720 | .lock = cifs_lock, | |
721 | .fsync = cifs_fsync, | |
722 | .flush = cifs_flush, | |
723 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 724 | .splice_read = generic_file_splice_read, |
c32a0b68 | 725 | .llseek = cifs_llseek, |
c67593a0 | 726 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 727 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 728 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 729 | .setlease = cifs_setlease, |
1da177e4 LT |
730 | }; |
731 | ||
4b6f5d20 | 732 | const struct file_operations cifs_file_direct_ops = { |
a994b8fa | 733 | /* no aio, no readv - |
1da177e4 LT |
734 | BB reevaluate whether they can be done with directio, no cache */ |
735 | .read = cifs_user_read, | |
736 | .write = cifs_user_write, | |
737 | .open = cifs_open, | |
738 | .release = cifs_close, | |
739 | .lock = cifs_lock, | |
740 | .fsync = cifs_fsync, | |
741 | .flush = cifs_flush, | |
a994b8fa | 742 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 743 | .splice_read = generic_file_splice_read, |
c67593a0 | 744 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 745 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 746 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 747 | .llseek = cifs_llseek, |
84210e91 | 748 | .setlease = cifs_setlease, |
1da177e4 | 749 | }; |
4b6f5d20 | 750 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
751 | .read = do_sync_read, |
752 | .write = do_sync_write, | |
87c89dd7 SF |
753 | .aio_read = generic_file_aio_read, |
754 | .aio_write = cifs_file_aio_write, | |
755 | .open = cifs_open, | |
756 | .release = cifs_close, | |
757 | .fsync = cifs_fsync, | |
758 | .flush = cifs_flush, | |
759 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 760 | .splice_read = generic_file_splice_read, |
c32a0b68 | 761 | .llseek = cifs_llseek, |
8b94bcb9 | 762 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 763 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 764 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 765 | .setlease = cifs_setlease, |
8b94bcb9 SF |
766 | }; |
767 | ||
4b6f5d20 | 768 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 769 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
770 | BB reevaluate whether they can be done with directio, no cache */ |
771 | .read = cifs_user_read, | |
772 | .write = cifs_user_write, | |
773 | .open = cifs_open, | |
774 | .release = cifs_close, | |
775 | .fsync = cifs_fsync, | |
776 | .flush = cifs_flush, | |
810627a0 | 777 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 778 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 779 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 780 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 781 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 782 | .llseek = cifs_llseek, |
84210e91 | 783 | .setlease = cifs_setlease, |
8b94bcb9 | 784 | }; |
1da177e4 | 785 | |
4b6f5d20 | 786 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
787 | .readdir = cifs_readdir, |
788 | .release = cifs_closedir, | |
789 | .read = generic_read_dir, | |
f9ddcca4 | 790 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 791 | .llseek = generic_file_llseek, |
1da177e4 LT |
792 | }; |
793 | ||
794 | static void | |
51cc5068 | 795 | cifs_init_once(void *inode) |
1da177e4 LT |
796 | { |
797 | struct cifsInodeInfo *cifsi = inode; | |
798 | ||
a35afb83 CL |
799 | inode_init_once(&cifsi->vfs_inode); |
800 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
801 | } |
802 | ||
803 | static int | |
804 | cifs_init_inodecache(void) | |
805 | { | |
806 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 807 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
808 | 0, (SLAB_RECLAIM_ACCOUNT| |
809 | SLAB_MEM_SPREAD), | |
20c2df83 | 810 | cifs_init_once); |
1da177e4 LT |
811 | if (cifs_inode_cachep == NULL) |
812 | return -ENOMEM; | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | static void | |
818 | cifs_destroy_inodecache(void) | |
819 | { | |
1a1d92c1 | 820 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
821 | } |
822 | ||
823 | static int | |
824 | cifs_init_request_bufs(void) | |
825 | { | |
4523cc30 | 826 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
827 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
828 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
829 | CIFSMaxBufSize = 8192; | |
830 | } else if (CIFSMaxBufSize > 1024*127) { | |
831 | CIFSMaxBufSize = 1024 * 127; | |
832 | } else { | |
833 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
834 | } | |
b6b38f70 | 835 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 LT |
836 | cifs_req_cachep = kmem_cache_create("cifs_request", |
837 | CIFSMaxBufSize + | |
838 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 839 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
840 | if (cifs_req_cachep == NULL) |
841 | return -ENOMEM; | |
842 | ||
4523cc30 | 843 | if (cifs_min_rcv < 1) |
1da177e4 LT |
844 | cifs_min_rcv = 1; |
845 | else if (cifs_min_rcv > 64) { | |
846 | cifs_min_rcv = 64; | |
b6b38f70 | 847 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
848 | } |
849 | ||
93d2341c MD |
850 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
851 | cifs_req_cachep); | |
1da177e4 | 852 | |
4523cc30 | 853 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
854 | kmem_cache_destroy(cifs_req_cachep); |
855 | return -ENOMEM; | |
856 | } | |
ec637e3f | 857 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
858 | almost all handle based requests (but not write response, nor is it |
859 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 860 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
861 | for the case in which debug was on, but this larger size allows |
862 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 863 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
864 | alloc of large cifs buffers even when page debugging is on */ |
865 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 866 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 867 | NULL); |
1da177e4 LT |
868 | if (cifs_sm_req_cachep == NULL) { |
869 | mempool_destroy(cifs_req_poolp); | |
870 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 871 | return -ENOMEM; |
1da177e4 LT |
872 | } |
873 | ||
4523cc30 | 874 | if (cifs_min_small < 2) |
1da177e4 LT |
875 | cifs_min_small = 2; |
876 | else if (cifs_min_small > 256) { | |
877 | cifs_min_small = 256; | |
b6b38f70 | 878 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
879 | } |
880 | ||
93d2341c MD |
881 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
882 | cifs_sm_req_cachep); | |
1da177e4 | 883 | |
4523cc30 | 884 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
885 | mempool_destroy(cifs_req_poolp); |
886 | kmem_cache_destroy(cifs_req_cachep); | |
887 | kmem_cache_destroy(cifs_sm_req_cachep); | |
888 | return -ENOMEM; | |
889 | } | |
890 | ||
891 | return 0; | |
892 | } | |
893 | ||
894 | static void | |
895 | cifs_destroy_request_bufs(void) | |
896 | { | |
897 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 898 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 899 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 900 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
901 | } |
902 | ||
903 | static int | |
904 | cifs_init_mids(void) | |
905 | { | |
906 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
907 | sizeof(struct mid_q_entry), 0, |
908 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
909 | if (cifs_mid_cachep == NULL) |
910 | return -ENOMEM; | |
911 | ||
93d2341c MD |
912 | /* 3 is a reasonable minimum number of simultaneous operations */ |
913 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 914 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
915 | kmem_cache_destroy(cifs_mid_cachep); |
916 | return -ENOMEM; | |
917 | } | |
918 | ||
1da177e4 LT |
919 | return 0; |
920 | } | |
921 | ||
922 | static void | |
923 | cifs_destroy_mids(void) | |
924 | { | |
925 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 926 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
927 | } |
928 | ||
1da177e4 LT |
929 | static int __init |
930 | init_cifs(void) | |
931 | { | |
932 | int rc = 0; | |
1da177e4 | 933 | cifs_proc_init(); |
e7ddee90 | 934 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
4ca9c190 SF |
935 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
936 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
937 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 938 | #endif |
1da177e4 LT |
939 | /* |
940 | * Initialize Global counters | |
941 | */ | |
942 | atomic_set(&sesInfoAllocCount, 0); | |
943 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 944 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
945 | atomic_set(&tcpSesReconnectCount, 0); |
946 | atomic_set(&tconInfoReconnectCount, 0); | |
947 | ||
948 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
949 | atomic_set(&smBufAllocCount, 0); |
950 | #ifdef CONFIG_CIFS_STATS2 | |
951 | atomic_set(&totBufAllocCount, 0); | |
952 | atomic_set(&totSmBufAllocCount, 0); | |
953 | #endif /* CONFIG_CIFS_STATS2 */ | |
954 | ||
1da177e4 LT |
955 | atomic_set(&midCount, 0); |
956 | GlobalCurrentXid = 0; | |
957 | GlobalTotalActiveXid = 0; | |
958 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 959 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 960 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
961 | spin_lock_init(&GlobalMid_Lock); |
962 | ||
4523cc30 | 963 | if (cifs_max_pending < 2) { |
1da177e4 | 964 | cifs_max_pending = 2; |
b6b38f70 | 965 | cFYI(1, "cifs_max_pending set to min of 2"); |
4523cc30 | 966 | } else if (cifs_max_pending > 256) { |
1da177e4 | 967 | cifs_max_pending = 256; |
b6b38f70 | 968 | cFYI(1, "cifs_max_pending set to max of 256"); |
1da177e4 LT |
969 | } |
970 | ||
f579cf3c SJ |
971 | rc = cifs_fscache_register(); |
972 | if (rc) | |
d3bf5221 | 973 | goto out_clean_proc; |
f579cf3c | 974 | |
1da177e4 | 975 | rc = cifs_init_inodecache(); |
45af7a0f | 976 | if (rc) |
d3bf5221 | 977 | goto out_unreg_fscache; |
45af7a0f SF |
978 | |
979 | rc = cifs_init_mids(); | |
980 | if (rc) | |
981 | goto out_destroy_inodecache; | |
982 | ||
983 | rc = cifs_init_request_bufs(); | |
984 | if (rc) | |
985 | goto out_destroy_mids; | |
986 | ||
987 | rc = register_filesystem(&cifs_fs_type); | |
988 | if (rc) | |
989 | goto out_destroy_request_bufs; | |
84a15b93 JL |
990 | #ifdef CONFIG_CIFS_UPCALL |
991 | rc = register_key_type(&cifs_spnego_key_type); | |
992 | if (rc) | |
993 | goto out_unregister_filesystem; | |
6103335d | 994 | #endif |
45af7a0f | 995 | |
45af7a0f SF |
996 | return 0; |
997 | ||
84a15b93 | 998 | #ifdef CONFIG_CIFS_UPCALL |
d3bf5221 | 999 | out_unregister_filesystem: |
45af7a0f | 1000 | unregister_filesystem(&cifs_fs_type); |
1fc7995d | 1001 | #endif |
d3bf5221 | 1002 | out_destroy_request_bufs: |
45af7a0f | 1003 | cifs_destroy_request_bufs(); |
d3bf5221 | 1004 | out_destroy_mids: |
45af7a0f | 1005 | cifs_destroy_mids(); |
d3bf5221 | 1006 | out_destroy_inodecache: |
45af7a0f | 1007 | cifs_destroy_inodecache(); |
d3bf5221 | 1008 | out_unreg_fscache: |
f579cf3c | 1009 | cifs_fscache_unregister(); |
d3bf5221 SF |
1010 | out_clean_proc: |
1011 | cifs_proc_clean(); | |
1da177e4 LT |
1012 | return rc; |
1013 | } | |
1014 | ||
1015 | static void __exit | |
1016 | exit_cifs(void) | |
1017 | { | |
b6b38f70 | 1018 | cFYI(DBG2, "exit_cifs"); |
1da177e4 | 1019 | cifs_proc_clean(); |
f579cf3c | 1020 | cifs_fscache_unregister(); |
6103335d | 1021 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1022 | cifs_dfs_release_automount_timer(); |
6103335d | 1023 | #endif |
84a15b93 JL |
1024 | #ifdef CONFIG_CIFS_UPCALL |
1025 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1026 | #endif |
1027 | unregister_filesystem(&cifs_fs_type); | |
1028 | cifs_destroy_inodecache(); | |
1029 | cifs_destroy_mids(); | |
1030 | cifs_destroy_request_bufs(); | |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1034 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1035 | MODULE_DESCRIPTION |
63135e08 SF |
1036 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1037 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1038 | MODULE_VERSION(CIFS_VERSION); |
1039 | module_init(init_cifs) | |
1040 | module_exit(exit_cifs) |