Commit | Line | Data |
---|---|---|
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 | |
53 | static 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; |
6dc0f87e SF |
67 | extern struct task_struct *oplockThread; /* remove sparse warning */ |
68 | struct task_struct *oplockThread = NULL; | |
99ee4dbd | 69 | /* extern struct task_struct * dnotifyThread; remove sparse warning */ |
ee9b6d61 | 70 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
71 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
72 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
73 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
74 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
75 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
76 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
77 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
78 | "1 to 64"); | |
1da177e4 LT |
79 | unsigned int cifs_min_small = 30; |
80 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
81 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
82 | "Range: 2 to 256"); | |
1da177e4 LT |
83 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
84 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
85 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
86 | "Default: 50 Range: 2 to 256"); | |
1da177e4 | 87 | |
1da177e4 LT |
88 | extern mempool_t *cifs_sm_req_poolp; |
89 | extern mempool_t *cifs_req_poolp; | |
90 | extern mempool_t *cifs_mid_poolp; | |
91 | ||
e18b890b | 92 | extern struct kmem_cache *cifs_oplock_cachep; |
1da177e4 LT |
93 | |
94 | static int | |
95 | cifs_read_super(struct super_block *sb, void *data, | |
96 | const char *devname, int silent) | |
97 | { | |
98 | struct inode *inode; | |
99 | struct cifs_sb_info *cifs_sb; | |
100 | int rc = 0; | |
50c2f753 | 101 | |
1b2b2126 SF |
102 | /* BB should we make this contingent on mount parm? */ |
103 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 104 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 105 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 106 | if (cifs_sb == NULL) |
1da177e4 | 107 | return -ENOMEM; |
1da177e4 | 108 | |
e6ab1582 IM |
109 | #ifdef CONFIG_CIFS_DFS_UPCALL |
110 | /* copy mount params to sb for use in submounts */ | |
111 | /* BB: should we move this after the mount so we | |
112 | * do not have to do the copy on failed mounts? | |
113 | * BB: May be it is better to do simple copy before | |
114 | * complex operation (mount), and in case of fail | |
115 | * just exit instead of doing mount and attempting | |
116 | * undo it if this copy fails?*/ | |
79ee9a8b SF |
117 | if (data) { |
118 | int len = strlen(data); | |
119 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
120 | if (cifs_sb->mountdata == NULL) { | |
121 | kfree(sb->s_fs_info); | |
122 | sb->s_fs_info = NULL; | |
123 | return -ENOMEM; | |
124 | } | |
125 | strncpy(cifs_sb->mountdata, data, len + 1); | |
126 | cifs_sb->mountdata[len] = '\0'; | |
e6ab1582 | 127 | } |
e6ab1582 IM |
128 | #endif |
129 | ||
1da177e4 LT |
130 | rc = cifs_mount(sb, cifs_sb, data, devname); |
131 | ||
132 | if (rc) { | |
133 | if (!silent) | |
134 | cERROR(1, | |
135 | ("cifs_mount failed w/return code = %d", rc)); | |
136 | goto out_mount_failed; | |
137 | } | |
138 | ||
139 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
140 | sb->s_op = &cifs_super_ops; | |
4523cc30 | 141 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
790fe579 SF |
142 | sb->s_blocksize = |
143 | cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ | |
1da177e4 LT |
144 | #ifdef CONFIG_CIFS_QUOTA |
145 | sb->s_qcop = &cifs_quotactl_ops; | |
146 | #endif | |
147 | sb->s_blocksize = CIFS_MAX_MSGSIZE; | |
148 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
ce634ab2 | 149 | inode = cifs_iget(sb, ROOT_I); |
1da177e4 | 150 | |
ce634ab2 DH |
151 | if (IS_ERR(inode)) { |
152 | rc = PTR_ERR(inode); | |
153 | inode = NULL; | |
1da177e4 LT |
154 | goto out_no_root; |
155 | } | |
156 | ||
157 | sb->s_root = d_alloc_root(inode); | |
158 | ||
159 | if (!sb->s_root) { | |
160 | rc = -ENOMEM; | |
161 | goto out_no_root; | |
162 | } | |
50c2f753 | 163 | |
7521a3c5 SF |
164 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
165 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
166 | cFYI(1, ("export ops supported")); | |
167 | sb->s_export_op = &cifs_export_ops; | |
168 | } | |
169 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
170 | |
171 | return 0; | |
172 | ||
173 | out_no_root: | |
174 | cERROR(1, ("cifs_read_super: get root inode failed")); | |
175 | if (inode) | |
176 | iput(inode); | |
54b4602d | 177 | |
2c731afb | 178 | cifs_umount(sb, cifs_sb); |
1da177e4 LT |
179 | |
180 | out_mount_failed: | |
4523cc30 | 181 | if (cifs_sb) { |
e6ab1582 IM |
182 | #ifdef CONFIG_CIFS_DFS_UPCALL |
183 | if (cifs_sb->mountdata) { | |
184 | kfree(cifs_sb->mountdata); | |
185 | cifs_sb->mountdata = NULL; | |
186 | } | |
187 | #endif | |
4523cc30 | 188 | if (cifs_sb->local_nls) |
50c2f753 | 189 | unload_nls(cifs_sb->local_nls); |
1da177e4 LT |
190 | kfree(cifs_sb); |
191 | } | |
192 | return rc; | |
193 | } | |
194 | ||
195 | static void | |
196 | cifs_put_super(struct super_block *sb) | |
197 | { | |
198 | int rc = 0; | |
199 | struct cifs_sb_info *cifs_sb; | |
200 | ||
201 | cFYI(1, ("In cifs_put_super")); | |
202 | cifs_sb = CIFS_SB(sb); | |
4523cc30 | 203 | if (cifs_sb == NULL) { |
790fe579 | 204 | cFYI(1, ("Empty cifs superblock info passed to unmount")); |
1da177e4 LT |
205 | return; |
206 | } | |
790fe579 | 207 | rc = cifs_umount(sb, cifs_sb); |
ad7a2926 | 208 | if (rc) |
1da177e4 | 209 | cERROR(1, ("cifs_umount failed with return code %d", rc)); |
e6ab1582 IM |
210 | #ifdef CONFIG_CIFS_DFS_UPCALL |
211 | if (cifs_sb->mountdata) { | |
212 | kfree(cifs_sb->mountdata); | |
213 | cifs_sb->mountdata = NULL; | |
214 | } | |
215 | #endif | |
216 | ||
1da177e4 LT |
217 | unload_nls(cifs_sb->local_nls); |
218 | kfree(cifs_sb); | |
219 | return; | |
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 */ | |
307 | atomic_set(&cifs_inode->inUse, 0); | |
308 | cifs_inode->time = 0; | |
cea21805 | 309 | cifs_inode->write_behind_rc = 0; |
1da177e4 LT |
310 | /* Until the file is open and we have gotten oplock |
311 | info back from the server, can not assume caching of | |
312 | file data or metadata */ | |
4b18f2a9 SF |
313 | cifs_inode->clientCanCacheRead = false; |
314 | cifs_inode->clientCanCacheAll = false; | |
9a8165fc | 315 | cifs_inode->delete_pending = false; |
1da177e4 | 316 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 317 | cifs_inode->server_eof = 0; |
50c2f753 | 318 | |
1b2b2126 SF |
319 | /* Can not set i_flags here - they get immediately overwritten |
320 | to zero by the VFS */ | |
321 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
322 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
323 | return &cifs_inode->vfs_inode; | |
324 | } | |
325 | ||
326 | static void | |
327 | cifs_destroy_inode(struct inode *inode) | |
328 | { | |
329 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
330 | } | |
331 | ||
332 | /* | |
333 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
334 | * Not all settable options are displayed but most of the important | |
335 | * ones are. | |
336 | */ | |
337 | static int | |
338 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
339 | { | |
340 | struct cifs_sb_info *cifs_sb; | |
80909022 JL |
341 | struct cifsTconInfo *tcon; |
342 | struct TCP_Server_Info *server; | |
1da177e4 LT |
343 | |
344 | cifs_sb = CIFS_SB(m->mnt_sb); | |
345 | ||
346 | if (cifs_sb) { | |
80909022 JL |
347 | tcon = cifs_sb->tcon; |
348 | if (tcon) { | |
1da177e4 | 349 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); |
80909022 JL |
350 | if (tcon->ses) { |
351 | if (tcon->ses->userName) | |
1da177e4 | 352 | seq_printf(s, ",username=%s", |
80909022 JL |
353 | tcon->ses->userName); |
354 | if (tcon->ses->domainName) | |
1da177e4 | 355 | seq_printf(s, ",domain=%s", |
80909022 JL |
356 | tcon->ses->domainName); |
357 | server = tcon->ses->server; | |
358 | if (server) { | |
359 | seq_printf(s, ",addr="); | |
360 | switch (server->addr.sockAddr6. | |
361 | sin6_family) { | |
362 | case AF_INET6: | |
bf66542b SR |
363 | seq_printf(s, "%pI6", |
364 | &server->addr.sockAddr6.sin6_addr); | |
80909022 JL |
365 | break; |
366 | case AF_INET: | |
bf66542b SR |
367 | seq_printf(s, "%pI4", |
368 | &server->addr.sockAddr.sin_addr.s_addr); | |
80909022 JL |
369 | break; |
370 | } | |
371 | } | |
1da177e4 | 372 | } |
d5d18501 | 373 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) || |
80909022 | 374 | !(tcon->unix_ext)) |
d5d18501 SF |
375 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
376 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) || | |
80909022 | 377 | !(tcon->unix_ext)) |
d5d18501 | 378 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
80909022 | 379 | if (!tcon->unix_ext) { |
2b280fab SF |
380 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", |
381 | cifs_sb->mnt_file_mode, | |
382 | cifs_sb->mnt_dir_mode); | |
383 | } | |
80909022 | 384 | if (tcon->seal) |
2b280fab | 385 | seq_printf(s, ",seal"); |
80909022 | 386 | if (tcon->nocase) |
2b280fab | 387 | seq_printf(s, ",nocase"); |
80909022 | 388 | if (tcon->retry) |
89562b77 | 389 | seq_printf(s, ",hard"); |
1da177e4 | 390 | } |
80909022 JL |
391 | if (cifs_sb->prepath) |
392 | seq_printf(s, ",prepath=%s", cifs_sb->prepath); | |
4523cc30 SF |
393 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
394 | seq_printf(s, ",posixpaths"); | |
2b280fab SF |
395 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
396 | seq_printf(s, ",setuids"); | |
397 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
398 | seq_printf(s, ",serverino"); | |
399 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
400 | seq_printf(s, ",directio"); | |
401 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
402 | seq_printf(s, ",nouser_xattr"); | |
403 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
404 | seq_printf(s, ",mapchars"); | |
405 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
406 | seq_printf(s, ",sfu"); | |
407 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
408 | seq_printf(s, ",nobrl"); | |
409 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
410 | seq_printf(s, ",cifsacl"); | |
411 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
412 | seq_printf(s, ",dynperm"); | |
413 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
414 | seq_printf(s, ",acl"); | |
415 | ||
50c2f753 SF |
416 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); |
417 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
1da177e4 LT |
418 | } |
419 | return 0; | |
420 | } | |
421 | ||
422 | #ifdef CONFIG_CIFS_QUOTA | |
50c2f753 SF |
423 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, |
424 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
425 | { |
426 | int xid; | |
427 | int rc = 0; | |
428 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
429 | struct cifsTconInfo *pTcon; | |
50c2f753 | 430 | |
4523cc30 | 431 | if (cifs_sb) |
1da177e4 LT |
432 | pTcon = cifs_sb->tcon; |
433 | else | |
434 | return -EIO; | |
435 | ||
436 | ||
437 | xid = GetXid(); | |
4523cc30 | 438 | if (pTcon) { |
50c2f753 | 439 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
61e74801 | 440 | } else |
95ba7362 | 441 | rc = -EIO; |
1da177e4 LT |
442 | |
443 | FreeXid(xid); | |
444 | return rc; | |
445 | } | |
446 | ||
50c2f753 SF |
447 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, |
448 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
449 | { |
450 | int xid; | |
451 | int rc = 0; | |
452 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
453 | struct cifsTconInfo *pTcon; | |
454 | ||
4523cc30 | 455 | if (cifs_sb) |
1da177e4 LT |
456 | pTcon = cifs_sb->tcon; |
457 | else | |
458 | return -EIO; | |
459 | ||
460 | xid = GetXid(); | |
4523cc30 | 461 | if (pTcon) { |
50c2f753 | 462 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
61e74801 | 463 | } else |
1da177e4 | 464 | rc = -EIO; |
1da177e4 LT |
465 | |
466 | FreeXid(xid); | |
467 | return rc; | |
468 | } | |
469 | ||
50c2f753 | 470 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) |
1da177e4 | 471 | { |
50c2f753 | 472 | int xid; |
1da177e4 LT |
473 | int rc = 0; |
474 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
475 | struct cifsTconInfo *pTcon; | |
476 | ||
4523cc30 | 477 | if (cifs_sb) |
1da177e4 LT |
478 | pTcon = cifs_sb->tcon; |
479 | else | |
480 | return -EIO; | |
481 | ||
482 | xid = GetXid(); | |
4523cc30 | 483 | if (pTcon) { |
50c2f753 | 484 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); |
61e74801 | 485 | } else |
1da177e4 | 486 | rc = -EIO; |
1da177e4 LT |
487 | |
488 | FreeXid(xid); | |
489 | return rc; | |
490 | } | |
491 | ||
50c2f753 | 492 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) |
1da177e4 LT |
493 | { |
494 | int xid; | |
495 | int rc = 0; | |
496 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
497 | struct cifsTconInfo *pTcon; | |
498 | ||
61e74801 | 499 | if (cifs_sb) |
1da177e4 | 500 | pTcon = cifs_sb->tcon; |
61e74801 | 501 | else |
1da177e4 | 502 | return -EIO; |
61e74801 | 503 | |
1da177e4 | 504 | xid = GetXid(); |
4523cc30 | 505 | if (pTcon) { |
50c2f753 | 506 | cFYI(1, ("pqstats %p", qstats)); |
61e74801 | 507 | } else |
1da177e4 | 508 | rc = -EIO; |
1da177e4 LT |
509 | |
510 | FreeXid(xid); | |
511 | return rc; | |
512 | } | |
513 | ||
514 | static struct quotactl_ops cifs_quotactl_ops = { | |
515 | .set_xquota = cifs_xquota_set, | |
6f7e8f37 | 516 | .get_xquota = cifs_xquota_get, |
1da177e4 LT |
517 | .set_xstate = cifs_xstate_set, |
518 | .get_xstate = cifs_xstate_get, | |
519 | }; | |
520 | #endif | |
521 | ||
42faad99 | 522 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 523 | { |
42faad99 | 524 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
50c2f753 | 525 | struct cifsTconInfo *tcon; |
68058e75 | 526 | |
4523cc30 | 527 | if (cifs_sb == NULL) |
9e2e85f8 SF |
528 | return; |
529 | ||
530 | tcon = cifs_sb->tcon; | |
4523cc30 | 531 | if (tcon == NULL) |
9e2e85f8 | 532 | return; |
f1987b44 | 533 | |
67e55205 | 534 | lock_kernel(); |
f1987b44 JL |
535 | read_lock(&cifs_tcp_ses_lock); |
536 | if (tcon->tc_count == 1) | |
5e1253b5 | 537 | tcon->tidStatus = CifsExiting; |
f1987b44 | 538 | read_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 539 | |
3a5ff61c | 540 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 541 | /* cancel_notify_requests(tcon); */ |
50c2f753 SF |
542 | if (tcon->ses && tcon->ses->server) { |
543 | cFYI(1, ("wake up tasks now - umount begin not complete")); | |
9e2e85f8 | 544 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
545 | wake_up_all(&tcon->ses->server->response_q); |
546 | msleep(1); /* yield */ | |
547 | /* we have to kick the requests once more */ | |
548 | wake_up_all(&tcon->ses->server->response_q); | |
549 | msleep(1); | |
5e1253b5 SF |
550 | } |
551 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 | 552 | |
67e55205 | 553 | unlock_kernel(); |
68058e75 SF |
554 | return; |
555 | } | |
68058e75 | 556 | |
bf97d287 SF |
557 | #ifdef CONFIG_CIFS_STATS2 |
558 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
559 | { | |
560 | /* BB FIXME */ | |
561 | return 0; | |
562 | } | |
563 | #endif | |
564 | ||
1da177e4 LT |
565 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
566 | { | |
567 | *flags |= MS_NODIRATIME; | |
568 | return 0; | |
569 | } | |
570 | ||
ee9b6d61 | 571 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
572 | .put_super = cifs_put_super, |
573 | .statfs = cifs_statfs, | |
574 | .alloc_inode = cifs_alloc_inode, | |
575 | .destroy_inode = cifs_destroy_inode, | |
50c2f753 SF |
576 | /* .drop_inode = generic_delete_inode, |
577 | .delete_inode = cifs_delete_inode, */ /* Do not need above two | |
578 | functions unless later we add lazy close of inodes or unless the | |
579 | kernel forgets to call us with the same number of releases (closes) | |
580 | as opens */ | |
1da177e4 | 581 | .show_options = cifs_show_options, |
7b7abfe3 | 582 | .umount_begin = cifs_umount_begin, |
1da177e4 | 583 | .remount_fs = cifs_remount, |
bf97d287 | 584 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 585 | .show_stats = cifs_show_stats, |
bf97d287 | 586 | #endif |
1da177e4 LT |
587 | }; |
588 | ||
454e2398 | 589 | static int |
1da177e4 | 590 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 591 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
592 | { |
593 | int rc; | |
594 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
595 | ||
596 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
597 | ||
598 | if (IS_ERR(sb)) | |
454e2398 | 599 | return PTR_ERR(sb); |
1da177e4 LT |
600 | |
601 | sb->s_flags = flags; | |
602 | ||
9b04c997 | 603 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
604 | if (rc) { |
605 | up_write(&sb->s_umount); | |
606 | deactivate_super(sb); | |
454e2398 | 607 | return rc; |
1da177e4 LT |
608 | } |
609 | sb->s_flags |= MS_ACTIVE; | |
a3ec947c SB |
610 | simple_set_mnt(mnt, sb); |
611 | return 0; | |
1da177e4 LT |
612 | } |
613 | ||
027445c3 BP |
614 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
615 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 616 | { |
e6a00296 | 617 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
618 | ssize_t written; |
619 | ||
027445c3 | 620 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
621 | if (!CIFS_I(inode)->clientCanCacheAll) |
622 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
623 | return written; |
624 | } | |
625 | ||
c32a0b68 SF |
626 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
627 | { | |
628 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 629 | if (origin == SEEK_END) { |
030e9d81 SF |
630 | int retval; |
631 | ||
632 | /* some applications poll for the file length in this strange | |
633 | way so we must seek to end on non-oplocked files by | |
634 | setting the revalidate time to zero */ | |
c33f8d32 | 635 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 SF |
636 | |
637 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
638 | if (retval < 0) |
639 | return (loff_t)retval; | |
640 | } | |
9465efc9 | 641 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
642 | } |
643 | ||
84210e91 SF |
644 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
645 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) | |
646 | { | |
647 | /* note that this is called by vfs setlease with the BKL held | |
648 | although I doubt that BKL is needed here in cifs */ | |
649 | struct inode *inode = file->f_path.dentry->d_inode; | |
650 | ||
651 | if (!(S_ISREG(inode->i_mode))) | |
652 | return -EINVAL; | |
653 | ||
654 | /* check if file is oplocked */ | |
655 | if (((arg == F_RDLCK) && | |
656 | (CIFS_I(inode)->clientCanCacheRead)) || | |
657 | ((arg == F_WRLCK) && | |
658 | (CIFS_I(inode)->clientCanCacheAll))) | |
659 | return generic_setlease(file, arg, lease); | |
660 | else if (CIFS_SB(inode->i_sb)->tcon->local_lease && | |
661 | !CIFS_I(inode)->clientCanCacheRead) | |
662 | /* If the server claims to support oplock on this | |
663 | file, then we still need to check oplock even | |
664 | if the local_lease mount option is set, but there | |
665 | are servers which do not support oplock for which | |
666 | this mount option may be useful if the user | |
667 | knows that the file won't be changed on the server | |
668 | by anyone else */ | |
669 | return generic_setlease(file, arg, lease); | |
670 | else | |
671 | return -EAGAIN; | |
672 | } | |
673 | #endif | |
674 | ||
e6ab1582 | 675 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
676 | .owner = THIS_MODULE, |
677 | .name = "cifs", | |
678 | .get_sb = cifs_get_sb, | |
679 | .kill_sb = kill_anon_super, | |
680 | /* .fs_flags */ | |
681 | }; | |
754661f1 | 682 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
683 | .create = cifs_create, |
684 | .lookup = cifs_lookup, | |
685 | .getattr = cifs_getattr, | |
686 | .unlink = cifs_unlink, | |
687 | .link = cifs_hardlink, | |
688 | .mkdir = cifs_mkdir, | |
689 | .rmdir = cifs_rmdir, | |
690 | .rename = cifs_rename, | |
691 | .permission = cifs_permission, | |
692 | /* revalidate:cifs_revalidate, */ | |
693 | .setattr = cifs_setattr, | |
694 | .symlink = cifs_symlink, | |
695 | .mknod = cifs_mknod, | |
696 | #ifdef CONFIG_CIFS_XATTR | |
697 | .setxattr = cifs_setxattr, | |
698 | .getxattr = cifs_getxattr, | |
699 | .listxattr = cifs_listxattr, | |
700 | .removexattr = cifs_removexattr, | |
701 | #endif | |
702 | }; | |
703 | ||
754661f1 | 704 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
705 | /* revalidate:cifs_revalidate, */ |
706 | .setattr = cifs_setattr, | |
707 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
708 | .rename = cifs_rename, | |
709 | .permission = cifs_permission, | |
710 | #ifdef CONFIG_CIFS_XATTR | |
711 | .setxattr = cifs_setxattr, | |
712 | .getxattr = cifs_getxattr, | |
713 | .listxattr = cifs_listxattr, | |
714 | .removexattr = cifs_removexattr, | |
50c2f753 | 715 | #endif |
1da177e4 LT |
716 | }; |
717 | ||
754661f1 | 718 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 719 | .readlink = generic_readlink, |
1da177e4 LT |
720 | .follow_link = cifs_follow_link, |
721 | .put_link = cifs_put_link, | |
722 | .permission = cifs_permission, | |
723 | /* BB add the following two eventually */ | |
724 | /* revalidate: cifs_revalidate, | |
725 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
726 | #ifdef CONFIG_CIFS_XATTR | |
727 | .setxattr = cifs_setxattr, | |
728 | .getxattr = cifs_getxattr, | |
729 | .listxattr = cifs_listxattr, | |
730 | .removexattr = cifs_removexattr, | |
50c2f753 | 731 | #endif |
1da177e4 LT |
732 | }; |
733 | ||
4b6f5d20 | 734 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
735 | .read = do_sync_read, |
736 | .write = do_sync_write, | |
87c89dd7 SF |
737 | .aio_read = generic_file_aio_read, |
738 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
739 | .open = cifs_open, |
740 | .release = cifs_close, | |
741 | .lock = cifs_lock, | |
742 | .fsync = cifs_fsync, | |
743 | .flush = cifs_flush, | |
744 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 745 | .splice_read = generic_file_splice_read, |
c32a0b68 | 746 | .llseek = cifs_llseek, |
c67593a0 | 747 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 748 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 SF |
749 | #endif /* CONFIG_CIFS_POSIX */ |
750 | ||
1da177e4 | 751 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
84210e91 | 752 | .setlease = cifs_setlease, |
1da177e4 LT |
753 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
754 | }; | |
755 | ||
4b6f5d20 | 756 | const struct file_operations cifs_file_direct_ops = { |
50c2f753 | 757 | /* no mmap, no aio, no readv - |
1da177e4 LT |
758 | BB reevaluate whether they can be done with directio, no cache */ |
759 | .read = cifs_user_read, | |
760 | .write = cifs_user_write, | |
761 | .open = cifs_open, | |
762 | .release = cifs_close, | |
763 | .lock = cifs_lock, | |
764 | .fsync = cifs_fsync, | |
765 | .flush = cifs_flush, | |
5ffc4ef4 | 766 | .splice_read = generic_file_splice_read, |
c67593a0 | 767 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 768 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 769 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 770 | .llseek = cifs_llseek, |
1da177e4 | 771 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
84210e91 | 772 | .setlease = cifs_setlease, |
1da177e4 LT |
773 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
774 | }; | |
4b6f5d20 | 775 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
776 | .read = do_sync_read, |
777 | .write = do_sync_write, | |
87c89dd7 SF |
778 | .aio_read = generic_file_aio_read, |
779 | .aio_write = cifs_file_aio_write, | |
780 | .open = cifs_open, | |
781 | .release = cifs_close, | |
782 | .fsync = cifs_fsync, | |
783 | .flush = cifs_flush, | |
784 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 785 | .splice_read = generic_file_splice_read, |
c32a0b68 | 786 | .llseek = cifs_llseek, |
8b94bcb9 | 787 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 788 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 SF |
789 | #endif /* CONFIG_CIFS_POSIX */ |
790 | ||
791 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
84210e91 | 792 | .setlease = cifs_setlease, |
8b94bcb9 SF |
793 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
794 | }; | |
795 | ||
4b6f5d20 | 796 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 797 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
798 | BB reevaluate whether they can be done with directio, no cache */ |
799 | .read = cifs_user_read, | |
800 | .write = cifs_user_write, | |
801 | .open = cifs_open, | |
802 | .release = cifs_close, | |
803 | .fsync = cifs_fsync, | |
804 | .flush = cifs_flush, | |
5ffc4ef4 | 805 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 806 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 807 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 808 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 809 | .llseek = cifs_llseek, |
8b94bcb9 | 810 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
84210e91 | 811 | .setlease = cifs_setlease, |
8b94bcb9 SF |
812 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
813 | }; | |
1da177e4 | 814 | |
4b6f5d20 | 815 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
816 | .readdir = cifs_readdir, |
817 | .release = cifs_closedir, | |
818 | .read = generic_read_dir, | |
f9ddcca4 | 819 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 820 | .llseek = generic_file_llseek, |
1da177e4 LT |
821 | }; |
822 | ||
823 | static void | |
51cc5068 | 824 | cifs_init_once(void *inode) |
1da177e4 LT |
825 | { |
826 | struct cifsInodeInfo *cifsi = inode; | |
827 | ||
a35afb83 CL |
828 | inode_init_once(&cifsi->vfs_inode); |
829 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
830 | } |
831 | ||
832 | static int | |
833 | cifs_init_inodecache(void) | |
834 | { | |
835 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 836 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
837 | 0, (SLAB_RECLAIM_ACCOUNT| |
838 | SLAB_MEM_SPREAD), | |
20c2df83 | 839 | cifs_init_once); |
1da177e4 LT |
840 | if (cifs_inode_cachep == NULL) |
841 | return -ENOMEM; | |
842 | ||
843 | return 0; | |
844 | } | |
845 | ||
846 | static void | |
847 | cifs_destroy_inodecache(void) | |
848 | { | |
1a1d92c1 | 849 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
850 | } |
851 | ||
852 | static int | |
853 | cifs_init_request_bufs(void) | |
854 | { | |
4523cc30 | 855 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
856 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
857 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
858 | CIFSMaxBufSize = 8192; | |
859 | } else if (CIFSMaxBufSize > 1024*127) { | |
860 | CIFSMaxBufSize = 1024 * 127; | |
861 | } else { | |
862 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
863 | } | |
864 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
865 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
866 | CIFSMaxBufSize + | |
867 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 868 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
869 | if (cifs_req_cachep == NULL) |
870 | return -ENOMEM; | |
871 | ||
4523cc30 | 872 | if (cifs_min_rcv < 1) |
1da177e4 LT |
873 | cifs_min_rcv = 1; |
874 | else if (cifs_min_rcv > 64) { | |
875 | cifs_min_rcv = 64; | |
50c2f753 | 876 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); |
1da177e4 LT |
877 | } |
878 | ||
93d2341c MD |
879 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
880 | cifs_req_cachep); | |
1da177e4 | 881 | |
4523cc30 | 882 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
883 | kmem_cache_destroy(cifs_req_cachep); |
884 | return -ENOMEM; | |
885 | } | |
ec637e3f | 886 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
887 | almost all handle based requests (but not write response, nor is it |
888 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 889 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
890 | for the case in which debug was on, but this larger size allows |
891 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 892 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
893 | alloc of large cifs buffers even when page debugging is on */ |
894 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 895 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 896 | NULL); |
1da177e4 LT |
897 | if (cifs_sm_req_cachep == NULL) { |
898 | mempool_destroy(cifs_req_poolp); | |
899 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 900 | return -ENOMEM; |
1da177e4 LT |
901 | } |
902 | ||
4523cc30 | 903 | if (cifs_min_small < 2) |
1da177e4 LT |
904 | cifs_min_small = 2; |
905 | else if (cifs_min_small > 256) { | |
906 | cifs_min_small = 256; | |
6dc0f87e | 907 | cFYI(1, ("cifs_min_small set to maximum (256)")); |
1da177e4 LT |
908 | } |
909 | ||
93d2341c MD |
910 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
911 | cifs_sm_req_cachep); | |
1da177e4 | 912 | |
4523cc30 | 913 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
914 | mempool_destroy(cifs_req_poolp); |
915 | kmem_cache_destroy(cifs_req_cachep); | |
916 | kmem_cache_destroy(cifs_sm_req_cachep); | |
917 | return -ENOMEM; | |
918 | } | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | static void | |
924 | cifs_destroy_request_bufs(void) | |
925 | { | |
926 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 927 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 928 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 929 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
930 | } |
931 | ||
932 | static int | |
933 | cifs_init_mids(void) | |
934 | { | |
935 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
936 | sizeof(struct mid_q_entry), 0, |
937 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
938 | if (cifs_mid_cachep == NULL) |
939 | return -ENOMEM; | |
940 | ||
93d2341c MD |
941 | /* 3 is a reasonable minimum number of simultaneous operations */ |
942 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 943 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
944 | kmem_cache_destroy(cifs_mid_cachep); |
945 | return -ENOMEM; | |
946 | } | |
947 | ||
948 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
26f57364 SF |
949 | sizeof(struct oplock_q_entry), 0, |
950 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 | 951 | if (cifs_oplock_cachep == NULL) { |
1da177e4 | 952 | mempool_destroy(cifs_mid_poolp); |
e6985c7f | 953 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
954 | return -ENOMEM; |
955 | } | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
960 | static void | |
961 | cifs_destroy_mids(void) | |
962 | { | |
963 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
964 | kmem_cache_destroy(cifs_mid_cachep); |
965 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
966 | } |
967 | ||
50c2f753 | 968 | static int cifs_oplock_thread(void *dummyarg) |
1da177e4 | 969 | { |
6dc0f87e | 970 | struct oplock_q_entry *oplock_item; |
1da177e4 | 971 | struct cifsTconInfo *pTcon; |
6dc0f87e | 972 | struct inode *inode; |
1da177e4 | 973 | __u16 netfid; |
cea21805 | 974 | int rc, waitrc = 0; |
1da177e4 | 975 | |
83144186 | 976 | set_freezable(); |
1da177e4 | 977 | do { |
6dc0f87e | 978 | if (try_to_freeze()) |
ede1327e | 979 | continue; |
50c2f753 | 980 | |
1da177e4 | 981 | spin_lock(&GlobalMid_Lock); |
4523cc30 | 982 | if (list_empty(&GlobalOplock_Q)) { |
1da177e4 LT |
983 | spin_unlock(&GlobalMid_Lock); |
984 | set_current_state(TASK_INTERRUPTIBLE); | |
985 | schedule_timeout(39*HZ); | |
986 | } else { | |
6dc0f87e | 987 | oplock_item = list_entry(GlobalOplock_Q.next, |
ad8b15f0 SF |
988 | struct oplock_q_entry, qhead); |
989 | cFYI(1, ("found oplock item to write out")); | |
990 | pTcon = oplock_item->tcon; | |
991 | inode = oplock_item->pinode; | |
992 | netfid = oplock_item->netfid; | |
993 | spin_unlock(&GlobalMid_Lock); | |
994 | DeleteOplockQEntry(oplock_item); | |
995 | /* can not grab inode sem here since it would | |
6dc0f87e | 996 | deadlock when oplock received on delete |
1b1dcc1b | 997 | since vfs_unlink holds the i_mutex across |
1da177e4 | 998 | the call */ |
ad8b15f0 SF |
999 | /* mutex_lock(&inode->i_mutex);*/ |
1000 | if (S_ISREG(inode->i_mode)) { | |
84210e91 SF |
1001 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1002 | if (CIFS_I(inode)->clientCanCacheAll == 0) | |
1003 | break_lease(inode, FMODE_READ); | |
1004 | else if (CIFS_I(inode)->clientCanCacheRead == 0) | |
1005 | break_lease(inode, FMODE_WRITE); | |
1006 | #endif | |
ad8b15f0 SF |
1007 | rc = filemap_fdatawrite(inode->i_mapping); |
1008 | if (CIFS_I(inode)->clientCanCacheRead == 0) { | |
1009 | waitrc = filemap_fdatawait( | |
1010 | inode->i_mapping); | |
1011 | invalidate_remote_inode(inode); | |
1012 | } | |
1013 | if (rc == 0) | |
1014 | rc = waitrc; | |
1015 | } else | |
1016 | rc = 0; | |
1017 | /* mutex_unlock(&inode->i_mutex);*/ | |
1018 | if (rc) | |
1019 | CIFS_I(inode)->write_behind_rc = rc; | |
1020 | cFYI(1, ("Oplock flush inode %p rc %d", | |
1021 | inode, rc)); | |
6dc0f87e SF |
1022 | |
1023 | /* releasing stale oplock after recent reconnect | |
1024 | of smb session using a now incorrect file | |
1025 | handle is not a data integrity issue but do | |
1026 | not bother sending an oplock release if session | |
1027 | to server still is disconnected since oplock | |
1da177e4 | 1028 | already released by the server in that case */ |
3b795210 | 1029 | if (!pTcon->need_reconnect) { |
ad8b15f0 SF |
1030 | rc = CIFSSMBLock(0, pTcon, netfid, |
1031 | 0 /* len */ , 0 /* offset */, 0, | |
1032 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
1033 | false /* wait flag */); | |
1034 | cFYI(1, ("Oplock release rc = %d", rc)); | |
1035 | } | |
68058e75 SF |
1036 | set_current_state(TASK_INTERRUPTIBLE); |
1037 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 1038 | } |
45af7a0f SF |
1039 | } while (!kthread_should_stop()); |
1040 | ||
1041 | return 0; | |
1da177e4 LT |
1042 | } |
1043 | ||
1044 | static int __init | |
1045 | init_cifs(void) | |
1046 | { | |
1047 | int rc = 0; | |
1da177e4 | 1048 | cifs_proc_init(); |
e7ddee90 | 1049 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
1da177e4 | 1050 | INIT_LIST_HEAD(&GlobalOplock_Q); |
4ca9c190 SF |
1051 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1052 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
1053 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 1054 | #endif |
1da177e4 LT |
1055 | /* |
1056 | * Initialize Global counters | |
1057 | */ | |
1058 | atomic_set(&sesInfoAllocCount, 0); | |
1059 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1060 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1061 | atomic_set(&tcpSesReconnectCount, 0); |
1062 | atomic_set(&tconInfoReconnectCount, 0); | |
1063 | ||
1064 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1065 | atomic_set(&smBufAllocCount, 0); |
1066 | #ifdef CONFIG_CIFS_STATS2 | |
1067 | atomic_set(&totBufAllocCount, 0); | |
1068 | atomic_set(&totSmBufAllocCount, 0); | |
1069 | #endif /* CONFIG_CIFS_STATS2 */ | |
1070 | ||
1da177e4 LT |
1071 | atomic_set(&midCount, 0); |
1072 | GlobalCurrentXid = 0; | |
1073 | GlobalTotalActiveXid = 0; | |
1074 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 1075 | memset(Local_System_Name, 0, 15); |
1da177e4 | 1076 | rwlock_init(&GlobalSMBSeslock); |
e7ddee90 | 1077 | rwlock_init(&cifs_tcp_ses_lock); |
1da177e4 LT |
1078 | spin_lock_init(&GlobalMid_Lock); |
1079 | ||
4523cc30 | 1080 | if (cifs_max_pending < 2) { |
1da177e4 | 1081 | cifs_max_pending = 2; |
6dc0f87e | 1082 | cFYI(1, ("cifs_max_pending set to min of 2")); |
4523cc30 | 1083 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1084 | cifs_max_pending = 256; |
6dc0f87e | 1085 | cFYI(1, ("cifs_max_pending set to max of 256")); |
1da177e4 LT |
1086 | } |
1087 | ||
1088 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
1089 | if (rc) |
1090 | goto out_clean_proc; | |
1091 | ||
1092 | rc = cifs_init_mids(); | |
1093 | if (rc) | |
1094 | goto out_destroy_inodecache; | |
1095 | ||
1096 | rc = cifs_init_request_bufs(); | |
1097 | if (rc) | |
1098 | goto out_destroy_mids; | |
1099 | ||
1100 | rc = register_filesystem(&cifs_fs_type); | |
1101 | if (rc) | |
1102 | goto out_destroy_request_bufs; | |
84a15b93 JL |
1103 | #ifdef CONFIG_CIFS_UPCALL |
1104 | rc = register_key_type(&cifs_spnego_key_type); | |
1105 | if (rc) | |
1106 | goto out_unregister_filesystem; | |
6103335d SF |
1107 | #endif |
1108 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1109 | rc = register_key_type(&key_type_dns_resolver); | |
1110 | if (rc) | |
1111 | goto out_unregister_key_type; | |
84a15b93 | 1112 | #endif |
45af7a0f SF |
1113 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); |
1114 | if (IS_ERR(oplockThread)) { | |
1115 | rc = PTR_ERR(oplockThread); | |
6dc0f87e | 1116 | cERROR(1, ("error %d create oplock thread", rc)); |
6103335d | 1117 | goto out_unregister_dfs_key_type; |
1da177e4 | 1118 | } |
45af7a0f | 1119 | |
45af7a0f SF |
1120 | return 0; |
1121 | ||
6103335d SF |
1122 | out_unregister_dfs_key_type: |
1123 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1124 | unregister_key_type(&key_type_dns_resolver); | |
84a15b93 | 1125 | out_unregister_key_type: |
6103335d | 1126 | #endif |
84a15b93 JL |
1127 | #ifdef CONFIG_CIFS_UPCALL |
1128 | unregister_key_type(&cifs_spnego_key_type); | |
45af7a0f | 1129 | out_unregister_filesystem: |
84a15b93 | 1130 | #endif |
45af7a0f SF |
1131 | unregister_filesystem(&cifs_fs_type); |
1132 | out_destroy_request_bufs: | |
1133 | cifs_destroy_request_bufs(); | |
1134 | out_destroy_mids: | |
1135 | cifs_destroy_mids(); | |
1136 | out_destroy_inodecache: | |
1137 | cifs_destroy_inodecache(); | |
1138 | out_clean_proc: | |
1da177e4 | 1139 | cifs_proc_clean(); |
1da177e4 LT |
1140 | return rc; |
1141 | } | |
1142 | ||
1143 | static void __exit | |
1144 | exit_cifs(void) | |
1145 | { | |
90c81e0b | 1146 | cFYI(DBG2, ("exit_cifs")); |
1da177e4 | 1147 | cifs_proc_clean(); |
6103335d | 1148 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1149 | cifs_dfs_release_automount_timer(); |
6103335d SF |
1150 | unregister_key_type(&key_type_dns_resolver); |
1151 | #endif | |
84a15b93 JL |
1152 | #ifdef CONFIG_CIFS_UPCALL |
1153 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1154 | #endif |
1155 | unregister_filesystem(&cifs_fs_type); | |
1156 | cifs_destroy_inodecache(); | |
1157 | cifs_destroy_mids(); | |
1158 | cifs_destroy_request_bufs(); | |
954d7a1c | 1159 | kthread_stop(oplockThread); |
1da177e4 LT |
1160 | } |
1161 | ||
1162 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1163 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1164 | MODULE_DESCRIPTION |
63135e08 SF |
1165 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1166 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1167 | MODULE_VERSION(CIFS_VERSION); |
1168 | module_init(init_cifs) | |
1169 | module_exit(exit_cifs) |