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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> |
67e55205 | 38 | #include <linux/smp_lock.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> |
6103335d | 48 | #include "dns_resolve.h" |
e545937a | 49 | #include "cifs_spnego.h" |
1da177e4 LT |
50 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
51 | ||
52 | #ifdef CONFIG_CIFS_QUOTA | |
0d54b217 | 53 | static const struct quotactl_ops cifs_quotactl_ops; |
35c11fdd SF |
54 | #endif /* QUOTA */ |
55 | ||
1da177e4 LT |
56 | int cifsFYI = 0; |
57 | int cifsERROR = 1; | |
58 | int traceSMB = 0; | |
59 | unsigned int oplockEnabled = 1; | |
60 | unsigned int experimEnabled = 0; | |
61 | unsigned int linuxExtEnabled = 1; | |
62 | unsigned int lookupCacheEnabled = 1; | |
63 | unsigned int multiuser_mount = 0; | |
3979877e SF |
64 | unsigned int extended_security = CIFSSEC_DEF; |
65 | /* unsigned int ntlmv2_support = 0; */ | |
1da177e4 | 66 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 67 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
68 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
69 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
70 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
71 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
72 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
73 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
74 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
75 | "1 to 64"); | |
1da177e4 LT |
76 | unsigned int cifs_min_small = 30; |
77 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
78 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
79 | "Range: 2 to 256"); | |
1da177e4 LT |
80 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
81 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
82 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
83 | "Default: 50 Range: 2 to 256"); | |
1da177e4 | 84 | |
1da177e4 LT |
85 | extern mempool_t *cifs_sm_req_poolp; |
86 | extern mempool_t *cifs_req_poolp; | |
87 | extern mempool_t *cifs_mid_poolp; | |
88 | ||
e18b890b | 89 | extern struct kmem_cache *cifs_oplock_cachep; |
1da177e4 LT |
90 | |
91 | static int | |
92 | cifs_read_super(struct super_block *sb, void *data, | |
93 | const char *devname, int silent) | |
94 | { | |
95 | struct inode *inode; | |
96 | struct cifs_sb_info *cifs_sb; | |
97 | int rc = 0; | |
50c2f753 | 98 | |
1b2b2126 SF |
99 | /* BB should we make this contingent on mount parm? */ |
100 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 101 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 102 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 103 | if (cifs_sb == NULL) |
1da177e4 | 104 | return -ENOMEM; |
1da177e4 | 105 | |
e6ab1582 IM |
106 | #ifdef CONFIG_CIFS_DFS_UPCALL |
107 | /* copy mount params to sb for use in submounts */ | |
108 | /* BB: should we move this after the mount so we | |
109 | * do not have to do the copy on failed mounts? | |
110 | * BB: May be it is better to do simple copy before | |
111 | * complex operation (mount), and in case of fail | |
112 | * just exit instead of doing mount and attempting | |
113 | * undo it if this copy fails?*/ | |
79ee9a8b SF |
114 | if (data) { |
115 | int len = strlen(data); | |
116 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
117 | if (cifs_sb->mountdata == NULL) { | |
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) | |
131 | cERROR(1, | |
132 | ("cifs_mount failed w/return code = %d", rc)); | |
133 | goto out_mount_failed; | |
134 | } | |
135 | ||
136 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
137 | sb->s_op = &cifs_super_ops; | |
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 | #ifdef CONFIG_CIFS_QUOTA |
142 | sb->s_qcop = &cifs_quotactl_ops; | |
143 | #endif | |
144 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
145 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
bd433d4c | 146 | inode = cifs_root_iget(sb, ROOT_I); |
1da177e4 | 147 | |
ce634ab2 DH |
148 | if (IS_ERR(inode)) { |
149 | rc = PTR_ERR(inode); | |
150 | inode = NULL; | |
1da177e4 LT |
151 | goto out_no_root; |
152 | } | |
153 | ||
154 | sb->s_root = d_alloc_root(inode); | |
155 | ||
156 | if (!sb->s_root) { | |
157 | rc = -ENOMEM; | |
158 | goto out_no_root; | |
159 | } | |
50c2f753 | 160 | |
7521a3c5 SF |
161 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
162 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
163 | cFYI(1, ("export ops supported")); | |
164 | sb->s_export_op = &cifs_export_ops; | |
165 | } | |
166 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
167 | |
168 | return 0; | |
169 | ||
170 | out_no_root: | |
171 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
172 | if (inode) | |
173 | iput(inode); | |
54b4602d | 174 | |
2c731afb | 175 | cifs_umount(sb, cifs_sb); |
1da177e4 LT |
176 | |
177 | out_mount_failed: | |
4523cc30 | 178 | if (cifs_sb) { |
e6ab1582 IM |
179 | #ifdef CONFIG_CIFS_DFS_UPCALL |
180 | if (cifs_sb->mountdata) { | |
181 | kfree(cifs_sb->mountdata); | |
182 | cifs_sb->mountdata = NULL; | |
183 | } | |
184 | #endif | |
6d729e44 | 185 | unload_nls(cifs_sb->local_nls); |
1da177e4 LT |
186 | kfree(cifs_sb); |
187 | } | |
188 | return rc; | |
189 | } | |
190 | ||
191 | static void | |
192 | cifs_put_super(struct super_block *sb) | |
193 | { | |
194 | int rc = 0; | |
195 | struct cifs_sb_info *cifs_sb; | |
196 | ||
197 | cFYI(1, ("In cifs_put_super")); | |
198 | cifs_sb = CIFS_SB(sb); | |
4523cc30 | 199 | if (cifs_sb == NULL) { |
790fe579 | 200 | cFYI(1, ("Empty cifs superblock info passed to unmount")); |
1da177e4 LT |
201 | return; |
202 | } | |
6cfd0148 CH |
203 | |
204 | lock_kernel(); | |
205 | ||
790fe579 | 206 | rc = cifs_umount(sb, cifs_sb); |
ad7a2926 | 207 | if (rc) |
1da177e4 | 208 | cERROR(1, ("cifs_umount failed with return code %d", rc)); |
e6ab1582 IM |
209 | #ifdef CONFIG_CIFS_DFS_UPCALL |
210 | if (cifs_sb->mountdata) { | |
211 | kfree(cifs_sb->mountdata); | |
212 | cifs_sb->mountdata = NULL; | |
213 | } | |
214 | #endif | |
215 | ||
1da177e4 LT |
216 | unload_nls(cifs_sb->local_nls); |
217 | kfree(cifs_sb); | |
6cfd0148 CH |
218 | |
219 | unlock_kernel(); | |
1da177e4 LT |
220 | } |
221 | ||
222 | static int | |
726c3342 | 223 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 224 | { |
726c3342 | 225 | struct super_block *sb = dentry->d_sb; |
39da9847 SF |
226 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
227 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
c81156dd | 228 | int rc = -EOPNOTSUPP; |
39da9847 | 229 | int xid; |
1da177e4 LT |
230 | |
231 | xid = GetXid(); | |
232 | ||
1da177e4 LT |
233 | buf->f_type = CIFS_MAGIC_NUMBER; |
234 | ||
39da9847 SF |
235 | /* |
236 | * PATH_MAX may be too long - it would presumably be total path, | |
237 | * but note that some servers (includinng Samba 3) have a shorter | |
238 | * maximum path. | |
239 | * | |
240 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
241 | */ | |
242 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
243 | buf->f_files = 0; /* undefined */ |
244 | buf->f_ffree = 0; /* unlimited */ | |
245 | ||
39da9847 SF |
246 | /* |
247 | * We could add a second check for a QFS Unix capability bit | |
248 | */ | |
249 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
250 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
251 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
252 | ||
253 | /* | |
254 | * Only need to call the old QFSInfo if failed on newer one, | |
255 | * e.g. by OS/2. | |
256 | **/ | |
257 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
258 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
259 | ||
260 | /* | |
261 | * Some old Windows servers also do not support level 103, retry with | |
262 | * older level one if old server failed the previous call or we | |
263 | * bypassed it because we detected that this was an older LANMAN sess | |
264 | */ | |
4523cc30 | 265 | if (rc) |
39da9847 SF |
266 | rc = SMBOldQFSInfo(xid, tcon, buf); |
267 | ||
1da177e4 | 268 | FreeXid(xid); |
39da9847 | 269 | return 0; |
1da177e4 LT |
270 | } |
271 | ||
e6305c43 | 272 | static int cifs_permission(struct inode *inode, int mask) |
1da177e4 LT |
273 | { |
274 | struct cifs_sb_info *cifs_sb; | |
275 | ||
276 | cifs_sb = CIFS_SB(inode->i_sb); | |
277 | ||
f696a365 MS |
278 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
279 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
280 | return -EACCES; | |
281 | else | |
282 | return 0; | |
283 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 284 | on the client (above and beyond ACL on servers) for |
1da177e4 | 285 | servers which do not support setting and viewing mode bits, |
50c2f753 | 286 | so allowing client to check permissions is useful */ |
1da177e4 LT |
287 | return generic_permission(inode, mask, NULL); |
288 | } | |
289 | ||
e18b890b CL |
290 | static struct kmem_cache *cifs_inode_cachep; |
291 | static struct kmem_cache *cifs_req_cachep; | |
292 | static struct kmem_cache *cifs_mid_cachep; | |
293 | struct kmem_cache *cifs_oplock_cachep; | |
294 | static struct kmem_cache *cifs_sm_req_cachep; | |
1da177e4 LT |
295 | mempool_t *cifs_sm_req_poolp; |
296 | mempool_t *cifs_req_poolp; | |
297 | mempool_t *cifs_mid_poolp; | |
298 | ||
299 | static struct inode * | |
300 | cifs_alloc_inode(struct super_block *sb) | |
301 | { | |
302 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 303 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
304 | if (!cifs_inode) |
305 | return NULL; | |
306 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 | 307 | cifs_inode->time = 0; |
cea21805 | 308 | cifs_inode->write_behind_rc = 0; |
1da177e4 LT |
309 | /* Until the file is open and we have gotten oplock |
310 | info back from the server, can not assume caching of | |
311 | file data or metadata */ | |
4b18f2a9 SF |
312 | cifs_inode->clientCanCacheRead = false; |
313 | cifs_inode->clientCanCacheAll = false; | |
9a8165fc | 314 | cifs_inode->delete_pending = false; |
1da177e4 | 315 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 316 | cifs_inode->server_eof = 0; |
50c2f753 | 317 | |
1b2b2126 SF |
318 | /* Can not set i_flags here - they get immediately overwritten |
319 | to zero by the VFS */ | |
320 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
321 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
322 | return &cifs_inode->vfs_inode; | |
323 | } | |
324 | ||
325 | static void | |
326 | cifs_destroy_inode(struct inode *inode) | |
327 | { | |
328 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
329 | } | |
330 | ||
61f98ffd JL |
331 | static void |
332 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
333 | { | |
334 | seq_printf(s, ",addr="); | |
335 | ||
336 | switch (server->addr.sockAddr.sin_family) { | |
337 | case AF_INET: | |
338 | seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr); | |
339 | break; | |
340 | case AF_INET6: | |
341 | seq_printf(s, "%pI6", | |
342 | &server->addr.sockAddr6.sin6_addr.s6_addr); | |
343 | if (server->addr.sockAddr6.sin6_scope_id) | |
344 | seq_printf(s, "%%%u", | |
345 | server->addr.sockAddr6.sin6_scope_id); | |
346 | break; | |
347 | default: | |
348 | seq_printf(s, "(unknown)"); | |
349 | } | |
350 | } | |
351 | ||
1da177e4 LT |
352 | /* |
353 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
354 | * Not all settable options are displayed but most of the important | |
355 | * ones are. | |
356 | */ | |
357 | static int | |
358 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
359 | { | |
8e047d09 JL |
360 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
361 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
8616e0fc | 362 | |
8e047d09 | 363 | seq_printf(s, ",unc=%s", tcon->treeName); |
8616e0fc JL |
364 | if (tcon->ses->userName) |
365 | seq_printf(s, ",username=%s", tcon->ses->userName); | |
366 | if (tcon->ses->domainName) | |
367 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
368 | ||
8616e0fc | 369 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
340481a3 JL |
370 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
371 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
372 | else |
373 | seq_printf(s, ",noforceuid"); | |
340481a3 | 374 | |
8616e0fc | 375 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
340481a3 JL |
376 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
377 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
378 | else |
379 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 380 | |
61f98ffd | 381 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 382 | |
8616e0fc JL |
383 | if (!tcon->unix_ext) |
384 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
2b280fab SF |
385 | cifs_sb->mnt_file_mode, |
386 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
387 | if (tcon->seal) |
388 | seq_printf(s, ",seal"); | |
389 | if (tcon->nocase) | |
390 | seq_printf(s, ",nocase"); | |
391 | if (tcon->retry) | |
392 | seq_printf(s, ",hard"); | |
393 | if (cifs_sb->prepath) | |
394 | seq_printf(s, ",prepath=%s", cifs_sb->prepath); | |
395 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
396 | seq_printf(s, ",posixpaths"); | |
397 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
398 | seq_printf(s, ",setuids"); | |
399 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
400 | seq_printf(s, ",serverino"); | |
401 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
402 | seq_printf(s, ",directio"); | |
403 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
404 | seq_printf(s, ",nouser_xattr"); | |
405 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
406 | seq_printf(s, ",mapchars"); | |
407 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
408 | seq_printf(s, ",sfu"); | |
409 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
410 | seq_printf(s, ",nobrl"); | |
411 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
412 | seq_printf(s, ",cifsacl"); | |
413 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
414 | seq_printf(s, ",dynperm"); | |
415 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
416 | seq_printf(s, ",acl"); | |
417 | ||
418 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
419 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
420 | ||
1da177e4 LT |
421 | return 0; |
422 | } | |
423 | ||
424 | #ifdef CONFIG_CIFS_QUOTA | |
50c2f753 SF |
425 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, |
426 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
427 | { |
428 | int xid; | |
429 | int rc = 0; | |
430 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
431 | struct cifsTconInfo *pTcon; | |
50c2f753 | 432 | |
4523cc30 | 433 | if (cifs_sb) |
1da177e4 LT |
434 | pTcon = cifs_sb->tcon; |
435 | else | |
436 | return -EIO; | |
437 | ||
438 | ||
439 | xid = GetXid(); | |
4523cc30 | 440 | if (pTcon) { |
50c2f753 | 441 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
61e74801 | 442 | } else |
95ba7362 | 443 | rc = -EIO; |
1da177e4 LT |
444 | |
445 | FreeXid(xid); | |
446 | return rc; | |
447 | } | |
448 | ||
50c2f753 SF |
449 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, |
450 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
451 | { |
452 | int xid; | |
453 | int rc = 0; | |
454 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
455 | struct cifsTconInfo *pTcon; | |
456 | ||
4523cc30 | 457 | if (cifs_sb) |
1da177e4 LT |
458 | pTcon = cifs_sb->tcon; |
459 | else | |
460 | return -EIO; | |
461 | ||
462 | xid = GetXid(); | |
4523cc30 | 463 | if (pTcon) { |
50c2f753 | 464 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
61e74801 | 465 | } else |
1da177e4 | 466 | rc = -EIO; |
1da177e4 LT |
467 | |
468 | FreeXid(xid); | |
469 | return rc; | |
470 | } | |
471 | ||
50c2f753 | 472 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) |
1da177e4 | 473 | { |
50c2f753 | 474 | int xid; |
1da177e4 LT |
475 | int rc = 0; |
476 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
477 | struct cifsTconInfo *pTcon; | |
478 | ||
4523cc30 | 479 | if (cifs_sb) |
1da177e4 LT |
480 | pTcon = cifs_sb->tcon; |
481 | else | |
482 | return -EIO; | |
483 | ||
484 | xid = GetXid(); | |
4523cc30 | 485 | if (pTcon) { |
50c2f753 | 486 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); |
61e74801 | 487 | } else |
1da177e4 | 488 | rc = -EIO; |
1da177e4 LT |
489 | |
490 | FreeXid(xid); | |
491 | return rc; | |
492 | } | |
493 | ||
50c2f753 | 494 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) |
1da177e4 LT |
495 | { |
496 | int xid; | |
497 | int rc = 0; | |
498 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
499 | struct cifsTconInfo *pTcon; | |
500 | ||
61e74801 | 501 | if (cifs_sb) |
1da177e4 | 502 | pTcon = cifs_sb->tcon; |
61e74801 | 503 | else |
1da177e4 | 504 | return -EIO; |
61e74801 | 505 | |
1da177e4 | 506 | xid = GetXid(); |
4523cc30 | 507 | if (pTcon) { |
50c2f753 | 508 | cFYI(1, ("pqstats %p", qstats)); |
61e74801 | 509 | } else |
1da177e4 | 510 | rc = -EIO; |
1da177e4 LT |
511 | |
512 | FreeXid(xid); | |
513 | return rc; | |
514 | } | |
515 | ||
0d54b217 | 516 | static const struct quotactl_ops cifs_quotactl_ops = { |
1da177e4 | 517 | .set_xquota = cifs_xquota_set, |
6f7e8f37 | 518 | .get_xquota = cifs_xquota_get, |
1da177e4 LT |
519 | .set_xstate = cifs_xstate_set, |
520 | .get_xstate = cifs_xstate_get, | |
521 | }; | |
522 | #endif | |
523 | ||
42faad99 | 524 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 525 | { |
42faad99 | 526 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
50c2f753 | 527 | struct cifsTconInfo *tcon; |
68058e75 | 528 | |
4523cc30 | 529 | if (cifs_sb == NULL) |
9e2e85f8 SF |
530 | return; |
531 | ||
532 | tcon = cifs_sb->tcon; | |
4523cc30 | 533 | if (tcon == NULL) |
9e2e85f8 | 534 | return; |
f1987b44 JL |
535 | |
536 | read_lock(&cifs_tcp_ses_lock); | |
ad8034f1 SF |
537 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
538 | /* we have other mounts to same share or we have | |
539 | already tried to force umount this and woken up | |
540 | all waiting network requests, nothing to do */ | |
541 | read_unlock(&cifs_tcp_ses_lock); | |
542 | return; | |
543 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 544 | tcon->tidStatus = CifsExiting; |
f1987b44 | 545 | read_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 546 | |
3a5ff61c | 547 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 548 | /* cancel_notify_requests(tcon); */ |
50c2f753 SF |
549 | if (tcon->ses && tcon->ses->server) { |
550 | cFYI(1, ("wake up tasks now - umount begin not complete")); | |
9e2e85f8 | 551 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
552 | wake_up_all(&tcon->ses->server->response_q); |
553 | msleep(1); /* yield */ | |
554 | /* we have to kick the requests once more */ | |
555 | wake_up_all(&tcon->ses->server->response_q); | |
556 | msleep(1); | |
5e1253b5 | 557 | } |
68058e75 SF |
558 | |
559 | return; | |
560 | } | |
68058e75 | 561 | |
bf97d287 SF |
562 | #ifdef CONFIG_CIFS_STATS2 |
563 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
564 | { | |
565 | /* BB FIXME */ | |
566 | return 0; | |
567 | } | |
568 | #endif | |
569 | ||
1da177e4 LT |
570 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
571 | { | |
572 | *flags |= MS_NODIRATIME; | |
573 | return 0; | |
574 | } | |
575 | ||
ee9b6d61 | 576 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
577 | .put_super = cifs_put_super, |
578 | .statfs = cifs_statfs, | |
579 | .alloc_inode = cifs_alloc_inode, | |
580 | .destroy_inode = cifs_destroy_inode, | |
50c2f753 SF |
581 | /* .drop_inode = generic_delete_inode, |
582 | .delete_inode = cifs_delete_inode, */ /* Do not need above two | |
583 | functions unless later we add lazy close of inodes or unless the | |
584 | kernel forgets to call us with the same number of releases (closes) | |
585 | as opens */ | |
1da177e4 | 586 | .show_options = cifs_show_options, |
7b7abfe3 | 587 | .umount_begin = cifs_umount_begin, |
1da177e4 | 588 | .remount_fs = cifs_remount, |
bf97d287 | 589 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 590 | .show_stats = cifs_show_stats, |
bf97d287 | 591 | #endif |
1da177e4 LT |
592 | }; |
593 | ||
454e2398 | 594 | static int |
1da177e4 | 595 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 596 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
597 | { |
598 | int rc; | |
599 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
600 | ||
601 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
602 | ||
603 | if (IS_ERR(sb)) | |
454e2398 | 604 | return PTR_ERR(sb); |
1da177e4 LT |
605 | |
606 | sb->s_flags = flags; | |
607 | ||
9b04c997 | 608 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 | 609 | if (rc) { |
6f5bbff9 | 610 | deactivate_locked_super(sb); |
454e2398 | 611 | return rc; |
1da177e4 LT |
612 | } |
613 | sb->s_flags |= MS_ACTIVE; | |
a3ec947c SB |
614 | simple_set_mnt(mnt, sb); |
615 | return 0; | |
1da177e4 LT |
616 | } |
617 | ||
027445c3 BP |
618 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
619 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 620 | { |
e6a00296 | 621 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
622 | ssize_t written; |
623 | ||
027445c3 | 624 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
625 | if (!CIFS_I(inode)->clientCanCacheAll) |
626 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
627 | return written; |
628 | } | |
629 | ||
c32a0b68 SF |
630 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
631 | { | |
632 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 633 | if (origin == SEEK_END) { |
030e9d81 SF |
634 | int retval; |
635 | ||
636 | /* some applications poll for the file length in this strange | |
637 | way so we must seek to end on non-oplocked files by | |
638 | setting the revalidate time to zero */ | |
c33f8d32 | 639 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 SF |
640 | |
641 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
642 | if (retval < 0) |
643 | return (loff_t)retval; | |
644 | } | |
9465efc9 | 645 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
646 | } |
647 | ||
84210e91 SF |
648 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
649 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) | |
650 | { | |
651 | /* note that this is called by vfs setlease with the BKL held | |
652 | although I doubt that BKL is needed here in cifs */ | |
653 | struct inode *inode = file->f_path.dentry->d_inode; | |
654 | ||
655 | if (!(S_ISREG(inode->i_mode))) | |
656 | return -EINVAL; | |
657 | ||
658 | /* check if file is oplocked */ | |
659 | if (((arg == F_RDLCK) && | |
660 | (CIFS_I(inode)->clientCanCacheRead)) || | |
661 | ((arg == F_WRLCK) && | |
662 | (CIFS_I(inode)->clientCanCacheAll))) | |
663 | return generic_setlease(file, arg, lease); | |
664 | else if (CIFS_SB(inode->i_sb)->tcon->local_lease && | |
665 | !CIFS_I(inode)->clientCanCacheRead) | |
666 | /* If the server claims to support oplock on this | |
667 | file, then we still need to check oplock even | |
668 | if the local_lease mount option is set, but there | |
669 | are servers which do not support oplock for which | |
670 | this mount option may be useful if the user | |
671 | knows that the file won't be changed on the server | |
672 | by anyone else */ | |
673 | return generic_setlease(file, arg, lease); | |
674 | else | |
675 | return -EAGAIN; | |
676 | } | |
677 | #endif | |
678 | ||
e6ab1582 | 679 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
680 | .owner = THIS_MODULE, |
681 | .name = "cifs", | |
682 | .get_sb = cifs_get_sb, | |
683 | .kill_sb = kill_anon_super, | |
684 | /* .fs_flags */ | |
685 | }; | |
754661f1 | 686 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
687 | .create = cifs_create, |
688 | .lookup = cifs_lookup, | |
689 | .getattr = cifs_getattr, | |
690 | .unlink = cifs_unlink, | |
691 | .link = cifs_hardlink, | |
692 | .mkdir = cifs_mkdir, | |
693 | .rmdir = cifs_rmdir, | |
694 | .rename = cifs_rename, | |
695 | .permission = cifs_permission, | |
696 | /* revalidate:cifs_revalidate, */ | |
697 | .setattr = cifs_setattr, | |
698 | .symlink = cifs_symlink, | |
699 | .mknod = cifs_mknod, | |
700 | #ifdef CONFIG_CIFS_XATTR | |
701 | .setxattr = cifs_setxattr, | |
702 | .getxattr = cifs_getxattr, | |
703 | .listxattr = cifs_listxattr, | |
704 | .removexattr = cifs_removexattr, | |
705 | #endif | |
706 | }; | |
707 | ||
754661f1 | 708 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
709 | /* revalidate:cifs_revalidate, */ |
710 | .setattr = cifs_setattr, | |
711 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
712 | .rename = cifs_rename, | |
713 | .permission = cifs_permission, | |
714 | #ifdef CONFIG_CIFS_XATTR | |
715 | .setxattr = cifs_setxattr, | |
716 | .getxattr = cifs_getxattr, | |
717 | .listxattr = cifs_listxattr, | |
718 | .removexattr = cifs_removexattr, | |
50c2f753 | 719 | #endif |
1da177e4 LT |
720 | }; |
721 | ||
754661f1 | 722 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 723 | .readlink = generic_readlink, |
1da177e4 LT |
724 | .follow_link = cifs_follow_link, |
725 | .put_link = cifs_put_link, | |
726 | .permission = cifs_permission, | |
727 | /* BB add the following two eventually */ | |
728 | /* revalidate: cifs_revalidate, | |
729 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
730 | #ifdef CONFIG_CIFS_XATTR | |
731 | .setxattr = cifs_setxattr, | |
732 | .getxattr = cifs_getxattr, | |
733 | .listxattr = cifs_listxattr, | |
734 | .removexattr = cifs_removexattr, | |
50c2f753 | 735 | #endif |
1da177e4 LT |
736 | }; |
737 | ||
4b6f5d20 | 738 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
739 | .read = do_sync_read, |
740 | .write = do_sync_write, | |
87c89dd7 SF |
741 | .aio_read = generic_file_aio_read, |
742 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
743 | .open = cifs_open, |
744 | .release = cifs_close, | |
745 | .lock = cifs_lock, | |
746 | .fsync = cifs_fsync, | |
747 | .flush = cifs_flush, | |
748 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 749 | .splice_read = generic_file_splice_read, |
c32a0b68 | 750 | .llseek = cifs_llseek, |
c67593a0 | 751 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 752 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 SF |
753 | #endif /* CONFIG_CIFS_POSIX */ |
754 | ||
1da177e4 | 755 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
84210e91 | 756 | .setlease = cifs_setlease, |
1da177e4 LT |
757 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
758 | }; | |
759 | ||
4b6f5d20 | 760 | const struct file_operations cifs_file_direct_ops = { |
a994b8fa | 761 | /* no aio, no readv - |
1da177e4 LT |
762 | BB reevaluate whether they can be done with directio, no cache */ |
763 | .read = cifs_user_read, | |
764 | .write = cifs_user_write, | |
765 | .open = cifs_open, | |
766 | .release = cifs_close, | |
767 | .lock = cifs_lock, | |
768 | .fsync = cifs_fsync, | |
769 | .flush = cifs_flush, | |
a994b8fa | 770 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 771 | .splice_read = generic_file_splice_read, |
c67593a0 | 772 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 773 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 774 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 775 | .llseek = cifs_llseek, |
1da177e4 | 776 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
84210e91 | 777 | .setlease = cifs_setlease, |
1da177e4 LT |
778 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
779 | }; | |
4b6f5d20 | 780 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
781 | .read = do_sync_read, |
782 | .write = do_sync_write, | |
87c89dd7 SF |
783 | .aio_read = generic_file_aio_read, |
784 | .aio_write = cifs_file_aio_write, | |
785 | .open = cifs_open, | |
786 | .release = cifs_close, | |
787 | .fsync = cifs_fsync, | |
788 | .flush = cifs_flush, | |
789 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 790 | .splice_read = generic_file_splice_read, |
c32a0b68 | 791 | .llseek = cifs_llseek, |
8b94bcb9 | 792 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 793 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 SF |
794 | #endif /* CONFIG_CIFS_POSIX */ |
795 | ||
796 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
84210e91 | 797 | .setlease = cifs_setlease, |
8b94bcb9 SF |
798 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
799 | }; | |
800 | ||
4b6f5d20 | 801 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 802 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
803 | BB reevaluate whether they can be done with directio, no cache */ |
804 | .read = cifs_user_read, | |
805 | .write = cifs_user_write, | |
806 | .open = cifs_open, | |
807 | .release = cifs_close, | |
808 | .fsync = cifs_fsync, | |
809 | .flush = cifs_flush, | |
5ffc4ef4 | 810 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 811 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 812 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 813 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 814 | .llseek = cifs_llseek, |
8b94bcb9 | 815 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
84210e91 | 816 | .setlease = cifs_setlease, |
8b94bcb9 SF |
817 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
818 | }; | |
1da177e4 | 819 | |
4b6f5d20 | 820 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
821 | .readdir = cifs_readdir, |
822 | .release = cifs_closedir, | |
823 | .read = generic_read_dir, | |
f9ddcca4 | 824 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 825 | .llseek = generic_file_llseek, |
1da177e4 LT |
826 | }; |
827 | ||
828 | static void | |
51cc5068 | 829 | cifs_init_once(void *inode) |
1da177e4 LT |
830 | { |
831 | struct cifsInodeInfo *cifsi = inode; | |
832 | ||
a35afb83 CL |
833 | inode_init_once(&cifsi->vfs_inode); |
834 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
835 | } |
836 | ||
837 | static int | |
838 | cifs_init_inodecache(void) | |
839 | { | |
840 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 841 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
842 | 0, (SLAB_RECLAIM_ACCOUNT| |
843 | SLAB_MEM_SPREAD), | |
20c2df83 | 844 | cifs_init_once); |
1da177e4 LT |
845 | if (cifs_inode_cachep == NULL) |
846 | return -ENOMEM; | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
851 | static void | |
852 | cifs_destroy_inodecache(void) | |
853 | { | |
1a1d92c1 | 854 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
855 | } |
856 | ||
857 | static int | |
858 | cifs_init_request_bufs(void) | |
859 | { | |
4523cc30 | 860 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
861 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
862 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
863 | CIFSMaxBufSize = 8192; | |
864 | } else if (CIFSMaxBufSize > 1024*127) { | |
865 | CIFSMaxBufSize = 1024 * 127; | |
866 | } else { | |
867 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
868 | } | |
869 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
870 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
871 | CIFSMaxBufSize + | |
872 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 873 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
874 | if (cifs_req_cachep == NULL) |
875 | return -ENOMEM; | |
876 | ||
4523cc30 | 877 | if (cifs_min_rcv < 1) |
1da177e4 LT |
878 | cifs_min_rcv = 1; |
879 | else if (cifs_min_rcv > 64) { | |
880 | cifs_min_rcv = 64; | |
50c2f753 | 881 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); |
1da177e4 LT |
882 | } |
883 | ||
93d2341c MD |
884 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
885 | cifs_req_cachep); | |
1da177e4 | 886 | |
4523cc30 | 887 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
888 | kmem_cache_destroy(cifs_req_cachep); |
889 | return -ENOMEM; | |
890 | } | |
ec637e3f | 891 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
892 | almost all handle based requests (but not write response, nor is it |
893 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 894 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
895 | for the case in which debug was on, but this larger size allows |
896 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 897 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
898 | alloc of large cifs buffers even when page debugging is on */ |
899 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 900 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 901 | NULL); |
1da177e4 LT |
902 | if (cifs_sm_req_cachep == NULL) { |
903 | mempool_destroy(cifs_req_poolp); | |
904 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 905 | return -ENOMEM; |
1da177e4 LT |
906 | } |
907 | ||
4523cc30 | 908 | if (cifs_min_small < 2) |
1da177e4 LT |
909 | cifs_min_small = 2; |
910 | else if (cifs_min_small > 256) { | |
911 | cifs_min_small = 256; | |
6dc0f87e | 912 | cFYI(1, ("cifs_min_small set to maximum (256)")); |
1da177e4 LT |
913 | } |
914 | ||
93d2341c MD |
915 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
916 | cifs_sm_req_cachep); | |
1da177e4 | 917 | |
4523cc30 | 918 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
919 | mempool_destroy(cifs_req_poolp); |
920 | kmem_cache_destroy(cifs_req_cachep); | |
921 | kmem_cache_destroy(cifs_sm_req_cachep); | |
922 | return -ENOMEM; | |
923 | } | |
924 | ||
925 | return 0; | |
926 | } | |
927 | ||
928 | static void | |
929 | cifs_destroy_request_bufs(void) | |
930 | { | |
931 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 932 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 933 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 934 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
935 | } |
936 | ||
937 | static int | |
938 | cifs_init_mids(void) | |
939 | { | |
940 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
941 | sizeof(struct mid_q_entry), 0, |
942 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
943 | if (cifs_mid_cachep == NULL) |
944 | return -ENOMEM; | |
945 | ||
93d2341c MD |
946 | /* 3 is a reasonable minimum number of simultaneous operations */ |
947 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 948 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
949 | kmem_cache_destroy(cifs_mid_cachep); |
950 | return -ENOMEM; | |
951 | } | |
952 | ||
953 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
26f57364 SF |
954 | sizeof(struct oplock_q_entry), 0, |
955 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 | 956 | if (cifs_oplock_cachep == NULL) { |
1da177e4 | 957 | mempool_destroy(cifs_mid_poolp); |
e6985c7f | 958 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
959 | return -ENOMEM; |
960 | } | |
961 | ||
962 | return 0; | |
963 | } | |
964 | ||
965 | static void | |
966 | cifs_destroy_mids(void) | |
967 | { | |
968 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
969 | kmem_cache_destroy(cifs_mid_cachep); |
970 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
971 | } |
972 | ||
1da177e4 LT |
973 | static int __init |
974 | init_cifs(void) | |
975 | { | |
976 | int rc = 0; | |
1da177e4 | 977 | cifs_proc_init(); |
e7ddee90 | 978 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
4ca9c190 SF |
979 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
980 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
981 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 982 | #endif |
1da177e4 LT |
983 | /* |
984 | * Initialize Global counters | |
985 | */ | |
986 | atomic_set(&sesInfoAllocCount, 0); | |
987 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 988 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
989 | atomic_set(&tcpSesReconnectCount, 0); |
990 | atomic_set(&tconInfoReconnectCount, 0); | |
991 | ||
992 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
993 | atomic_set(&smBufAllocCount, 0); |
994 | #ifdef CONFIG_CIFS_STATS2 | |
995 | atomic_set(&totBufAllocCount, 0); | |
996 | atomic_set(&totSmBufAllocCount, 0); | |
997 | #endif /* CONFIG_CIFS_STATS2 */ | |
998 | ||
1da177e4 LT |
999 | atomic_set(&midCount, 0); |
1000 | GlobalCurrentXid = 0; | |
1001 | GlobalTotalActiveXid = 0; | |
1002 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 1003 | memset(Local_System_Name, 0, 15); |
1da177e4 | 1004 | rwlock_init(&GlobalSMBSeslock); |
e7ddee90 | 1005 | rwlock_init(&cifs_tcp_ses_lock); |
1da177e4 LT |
1006 | spin_lock_init(&GlobalMid_Lock); |
1007 | ||
4523cc30 | 1008 | if (cifs_max_pending < 2) { |
1da177e4 | 1009 | cifs_max_pending = 2; |
6dc0f87e | 1010 | cFYI(1, ("cifs_max_pending set to min of 2")); |
4523cc30 | 1011 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1012 | cifs_max_pending = 256; |
6dc0f87e | 1013 | cFYI(1, ("cifs_max_pending set to max of 256")); |
1da177e4 LT |
1014 | } |
1015 | ||
1016 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
1017 | if (rc) |
1018 | goto out_clean_proc; | |
1019 | ||
1020 | rc = cifs_init_mids(); | |
1021 | if (rc) | |
1022 | goto out_destroy_inodecache; | |
1023 | ||
1024 | rc = cifs_init_request_bufs(); | |
1025 | if (rc) | |
1026 | goto out_destroy_mids; | |
1027 | ||
1028 | rc = register_filesystem(&cifs_fs_type); | |
1029 | if (rc) | |
1030 | goto out_destroy_request_bufs; | |
84a15b93 JL |
1031 | #ifdef CONFIG_CIFS_UPCALL |
1032 | rc = register_key_type(&cifs_spnego_key_type); | |
1033 | if (rc) | |
1034 | goto out_unregister_filesystem; | |
6103335d SF |
1035 | #endif |
1036 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1037 | rc = register_key_type(&key_type_dns_resolver); | |
1038 | if (rc) | |
1039 | goto out_unregister_key_type; | |
84a15b93 | 1040 | #endif |
0109d7e6 | 1041 | rc = slow_work_register_user(THIS_MODULE); |
3bc303c2 JL |
1042 | if (rc) |
1043 | goto out_unregister_resolver_key; | |
45af7a0f | 1044 | |
45af7a0f SF |
1045 | return 0; |
1046 | ||
3bc303c2 | 1047 | out_unregister_resolver_key: |
6103335d SF |
1048 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1049 | unregister_key_type(&key_type_dns_resolver); | |
84a15b93 | 1050 | out_unregister_key_type: |
6103335d | 1051 | #endif |
84a15b93 JL |
1052 | #ifdef CONFIG_CIFS_UPCALL |
1053 | unregister_key_type(&cifs_spnego_key_type); | |
45af7a0f | 1054 | out_unregister_filesystem: |
84a15b93 | 1055 | #endif |
45af7a0f SF |
1056 | unregister_filesystem(&cifs_fs_type); |
1057 | out_destroy_request_bufs: | |
1058 | cifs_destroy_request_bufs(); | |
1059 | out_destroy_mids: | |
1060 | cifs_destroy_mids(); | |
1061 | out_destroy_inodecache: | |
1062 | cifs_destroy_inodecache(); | |
1063 | out_clean_proc: | |
1da177e4 | 1064 | cifs_proc_clean(); |
1da177e4 LT |
1065 | return rc; |
1066 | } | |
1067 | ||
1068 | static void __exit | |
1069 | exit_cifs(void) | |
1070 | { | |
90c81e0b | 1071 | cFYI(DBG2, ("exit_cifs")); |
1da177e4 | 1072 | cifs_proc_clean(); |
6103335d | 1073 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1074 | cifs_dfs_release_automount_timer(); |
6103335d SF |
1075 | unregister_key_type(&key_type_dns_resolver); |
1076 | #endif | |
84a15b93 JL |
1077 | #ifdef CONFIG_CIFS_UPCALL |
1078 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1079 | #endif |
1080 | unregister_filesystem(&cifs_fs_type); | |
1081 | cifs_destroy_inodecache(); | |
1082 | cifs_destroy_mids(); | |
1083 | cifs_destroy_request_bufs(); | |
1da177e4 LT |
1084 | } |
1085 | ||
1086 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1087 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1088 | MODULE_DESCRIPTION |
63135e08 SF |
1089 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1090 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1091 | MODULE_VERSION(CIFS_VERSION); |
1092 | module_init(init_cifs) | |
1093 | module_exit(exit_cifs) |