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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> |
1da177e4 LT |
38 | #include "cifsfs.h" |
39 | #include "cifspdu.h" | |
40 | #define DECLARE_GLOBALS_HERE | |
41 | #include "cifsglob.h" | |
42 | #include "cifsproto.h" | |
43 | #include "cifs_debug.h" | |
44 | #include "cifs_fs_sb.h" | |
45 | #include <linux/mm.h> | |
84a15b93 | 46 | #include <linux/key-type.h> |
6103335d | 47 | #include "dns_resolve.h" |
e545937a | 48 | #include "cifs_spnego.h" |
1da177e4 LT |
49 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
50 | ||
51 | #ifdef CONFIG_CIFS_QUOTA | |
52 | static struct quotactl_ops cifs_quotactl_ops; | |
35c11fdd SF |
53 | #endif /* QUOTA */ |
54 | ||
1da177e4 LT |
55 | int cifsFYI = 0; |
56 | int cifsERROR = 1; | |
57 | int traceSMB = 0; | |
58 | unsigned int oplockEnabled = 1; | |
59 | unsigned int experimEnabled = 0; | |
60 | unsigned int linuxExtEnabled = 1; | |
61 | unsigned int lookupCacheEnabled = 1; | |
62 | unsigned int multiuser_mount = 0; | |
3979877e SF |
63 | unsigned int extended_security = CIFSSEC_DEF; |
64 | /* unsigned int ntlmv2_support = 0; */ | |
1da177e4 | 65 | unsigned int sign_CIFS_PDUs = 1; |
6dc0f87e SF |
66 | extern struct task_struct *oplockThread; /* remove sparse warning */ |
67 | struct task_struct *oplockThread = NULL; | |
99ee4dbd | 68 | /* extern struct task_struct * dnotifyThread; remove sparse warning */ |
6dc0f87e | 69 | static struct task_struct *dnotifyThread = NULL; |
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 */ |
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 | ||
331 | /* | |
332 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
333 | * Not all settable options are displayed but most of the important | |
334 | * ones are. | |
335 | */ | |
336 | static int | |
337 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
338 | { | |
339 | struct cifs_sb_info *cifs_sb; | |
340 | ||
341 | cifs_sb = CIFS_SB(m->mnt_sb); | |
342 | ||
343 | if (cifs_sb) { | |
344 | if (cifs_sb->tcon) { | |
004c46b9 | 345 | /* BB add prepath to mount options displayed */ |
1da177e4 LT |
346 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); |
347 | if (cifs_sb->tcon->ses) { | |
348 | if (cifs_sb->tcon->ses->userName) | |
349 | seq_printf(s, ",username=%s", | |
350 | cifs_sb->tcon->ses->userName); | |
4523cc30 | 351 | if (cifs_sb->tcon->ses->domainName) |
1da177e4 LT |
352 | seq_printf(s, ",domain=%s", |
353 | cifs_sb->tcon->ses->domainName); | |
354 | } | |
d5d18501 SF |
355 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) || |
356 | !(cifs_sb->tcon->unix_ext)) | |
357 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); | |
358 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) || | |
359 | !(cifs_sb->tcon->unix_ext)) | |
360 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); | |
2b280fab SF |
361 | if (!cifs_sb->tcon->unix_ext) { |
362 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
363 | cifs_sb->mnt_file_mode, | |
364 | cifs_sb->mnt_dir_mode); | |
365 | } | |
366 | if (cifs_sb->tcon->seal) | |
367 | seq_printf(s, ",seal"); | |
89562b77 | 368 | if (cifs_sb->tcon->nocase) |
2b280fab | 369 | seq_printf(s, ",nocase"); |
89562b77 SF |
370 | if (cifs_sb->tcon->retry) |
371 | seq_printf(s, ",hard"); | |
1da177e4 | 372 | } |
4523cc30 SF |
373 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
374 | seq_printf(s, ",posixpaths"); | |
2b280fab SF |
375 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
376 | seq_printf(s, ",setuids"); | |
377 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
378 | seq_printf(s, ",serverino"); | |
379 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
380 | seq_printf(s, ",directio"); | |
381 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
382 | seq_printf(s, ",nouser_xattr"); | |
383 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
384 | seq_printf(s, ",mapchars"); | |
385 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
386 | seq_printf(s, ",sfu"); | |
387 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
388 | seq_printf(s, ",nobrl"); | |
389 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
390 | seq_printf(s, ",cifsacl"); | |
391 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
392 | seq_printf(s, ",dynperm"); | |
393 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
394 | seq_printf(s, ",acl"); | |
395 | ||
50c2f753 SF |
396 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); |
397 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
1da177e4 LT |
398 | } |
399 | return 0; | |
400 | } | |
401 | ||
402 | #ifdef CONFIG_CIFS_QUOTA | |
50c2f753 SF |
403 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, |
404 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
405 | { |
406 | int xid; | |
407 | int rc = 0; | |
408 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
409 | struct cifsTconInfo *pTcon; | |
50c2f753 | 410 | |
4523cc30 | 411 | if (cifs_sb) |
1da177e4 LT |
412 | pTcon = cifs_sb->tcon; |
413 | else | |
414 | return -EIO; | |
415 | ||
416 | ||
417 | xid = GetXid(); | |
4523cc30 | 418 | if (pTcon) { |
50c2f753 | 419 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 | 420 | } else { |
95ba7362 | 421 | rc = -EIO; |
1da177e4 LT |
422 | } |
423 | ||
424 | FreeXid(xid); | |
425 | return rc; | |
426 | } | |
427 | ||
50c2f753 SF |
428 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, |
429 | struct fs_disk_quota *pdquota) | |
1da177e4 LT |
430 | { |
431 | int xid; | |
432 | int rc = 0; | |
433 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
434 | struct cifsTconInfo *pTcon; | |
435 | ||
4523cc30 | 436 | if (cifs_sb) |
1da177e4 LT |
437 | pTcon = cifs_sb->tcon; |
438 | else | |
439 | return -EIO; | |
440 | ||
441 | xid = GetXid(); | |
4523cc30 | 442 | if (pTcon) { |
50c2f753 | 443 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
1da177e4 LT |
444 | } else { |
445 | rc = -EIO; | |
446 | } | |
447 | ||
448 | FreeXid(xid); | |
449 | return rc; | |
450 | } | |
451 | ||
50c2f753 | 452 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) |
1da177e4 | 453 | { |
50c2f753 | 454 | int xid; |
1da177e4 LT |
455 | int rc = 0; |
456 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
457 | struct cifsTconInfo *pTcon; | |
458 | ||
4523cc30 | 459 | if (cifs_sb) |
1da177e4 LT |
460 | pTcon = cifs_sb->tcon; |
461 | else | |
462 | return -EIO; | |
463 | ||
464 | xid = GetXid(); | |
4523cc30 | 465 | if (pTcon) { |
50c2f753 | 466 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); |
1da177e4 LT |
467 | } else { |
468 | rc = -EIO; | |
469 | } | |
470 | ||
471 | FreeXid(xid); | |
472 | return rc; | |
473 | } | |
474 | ||
50c2f753 | 475 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) |
1da177e4 LT |
476 | { |
477 | int xid; | |
478 | int rc = 0; | |
479 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
480 | struct cifsTconInfo *pTcon; | |
481 | ||
4523cc30 | 482 | if (cifs_sb) { |
1da177e4 LT |
483 | pTcon = cifs_sb->tcon; |
484 | } else { | |
485 | return -EIO; | |
486 | } | |
487 | xid = GetXid(); | |
4523cc30 | 488 | if (pTcon) { |
50c2f753 | 489 | cFYI(1, ("pqstats %p", qstats)); |
1da177e4 LT |
490 | } else { |
491 | rc = -EIO; | |
492 | } | |
493 | ||
494 | FreeXid(xid); | |
495 | return rc; | |
496 | } | |
497 | ||
498 | static struct quotactl_ops cifs_quotactl_ops = { | |
499 | .set_xquota = cifs_xquota_set, | |
6f7e8f37 | 500 | .get_xquota = cifs_xquota_get, |
1da177e4 LT |
501 | .set_xstate = cifs_xstate_set, |
502 | .get_xstate = cifs_xstate_get, | |
503 | }; | |
504 | #endif | |
505 | ||
42faad99 | 506 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 507 | { |
42faad99 | 508 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
50c2f753 | 509 | struct cifsTconInfo *tcon; |
68058e75 | 510 | |
4523cc30 | 511 | if (cifs_sb == NULL) |
9e2e85f8 SF |
512 | return; |
513 | ||
514 | tcon = cifs_sb->tcon; | |
4523cc30 | 515 | if (tcon == NULL) |
9e2e85f8 | 516 | return; |
f1987b44 JL |
517 | |
518 | read_lock(&cifs_tcp_ses_lock); | |
519 | if (tcon->tc_count == 1) | |
5e1253b5 | 520 | tcon->tidStatus = CifsExiting; |
f1987b44 | 521 | read_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 522 | |
3a5ff61c | 523 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 524 | /* cancel_notify_requests(tcon); */ |
50c2f753 SF |
525 | if (tcon->ses && tcon->ses->server) { |
526 | cFYI(1, ("wake up tasks now - umount begin not complete")); | |
9e2e85f8 | 527 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
528 | wake_up_all(&tcon->ses->server->response_q); |
529 | msleep(1); /* yield */ | |
530 | /* we have to kick the requests once more */ | |
531 | wake_up_all(&tcon->ses->server->response_q); | |
532 | msleep(1); | |
5e1253b5 SF |
533 | } |
534 | /* BB FIXME - finish add checks for tidStatus BB */ | |
68058e75 SF |
535 | |
536 | return; | |
537 | } | |
68058e75 | 538 | |
bf97d287 SF |
539 | #ifdef CONFIG_CIFS_STATS2 |
540 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
541 | { | |
542 | /* BB FIXME */ | |
543 | return 0; | |
544 | } | |
545 | #endif | |
546 | ||
1da177e4 LT |
547 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
548 | { | |
549 | *flags |= MS_NODIRATIME; | |
550 | return 0; | |
551 | } | |
552 | ||
ee9b6d61 | 553 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
554 | .put_super = cifs_put_super, |
555 | .statfs = cifs_statfs, | |
556 | .alloc_inode = cifs_alloc_inode, | |
557 | .destroy_inode = cifs_destroy_inode, | |
50c2f753 SF |
558 | /* .drop_inode = generic_delete_inode, |
559 | .delete_inode = cifs_delete_inode, */ /* Do not need above two | |
560 | functions unless later we add lazy close of inodes or unless the | |
561 | kernel forgets to call us with the same number of releases (closes) | |
562 | as opens */ | |
1da177e4 | 563 | .show_options = cifs_show_options, |
7b7abfe3 | 564 | .umount_begin = cifs_umount_begin, |
1da177e4 | 565 | .remount_fs = cifs_remount, |
bf97d287 | 566 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 567 | .show_stats = cifs_show_stats, |
bf97d287 | 568 | #endif |
1da177e4 LT |
569 | }; |
570 | ||
454e2398 | 571 | static int |
1da177e4 | 572 | cifs_get_sb(struct file_system_type *fs_type, |
454e2398 | 573 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4 LT |
574 | { |
575 | int rc; | |
576 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); | |
577 | ||
578 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); | |
579 | ||
580 | if (IS_ERR(sb)) | |
454e2398 | 581 | return PTR_ERR(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 LT |
586 | if (rc) { |
587 | up_write(&sb->s_umount); | |
588 | deactivate_super(sb); | |
454e2398 | 589 | return rc; |
1da177e4 LT |
590 | } |
591 | sb->s_flags |= MS_ACTIVE; | |
454e2398 | 592 | return simple_set_mnt(mnt, sb); |
1da177e4 LT |
593 | } |
594 | ||
027445c3 BP |
595 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
596 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 597 | { |
e6a00296 | 598 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 LT |
599 | ssize_t written; |
600 | ||
027445c3 | 601 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd7 SF |
602 | if (!CIFS_I(inode)->clientCanCacheAll) |
603 | filemap_fdatawrite(inode->i_mapping); | |
1da177e4 LT |
604 | return written; |
605 | } | |
606 | ||
c32a0b68 SF |
607 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
608 | { | |
609 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 610 | if (origin == SEEK_END) { |
030e9d81 SF |
611 | int retval; |
612 | ||
613 | /* some applications poll for the file length in this strange | |
614 | way so we must seek to end on non-oplocked files by | |
615 | setting the revalidate time to zero */ | |
c33f8d32 | 616 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 SF |
617 | |
618 | retval = cifs_revalidate(file->f_path.dentry); | |
c32a0b68 SF |
619 | if (retval < 0) |
620 | return (loff_t)retval; | |
621 | } | |
9465efc9 | 622 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
623 | } |
624 | ||
84210e91 SF |
625 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
626 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) | |
627 | { | |
628 | /* note that this is called by vfs setlease with the BKL held | |
629 | although I doubt that BKL is needed here in cifs */ | |
630 | struct inode *inode = file->f_path.dentry->d_inode; | |
631 | ||
632 | if (!(S_ISREG(inode->i_mode))) | |
633 | return -EINVAL; | |
634 | ||
635 | /* check if file is oplocked */ | |
636 | if (((arg == F_RDLCK) && | |
637 | (CIFS_I(inode)->clientCanCacheRead)) || | |
638 | ((arg == F_WRLCK) && | |
639 | (CIFS_I(inode)->clientCanCacheAll))) | |
640 | return generic_setlease(file, arg, lease); | |
641 | else if (CIFS_SB(inode->i_sb)->tcon->local_lease && | |
642 | !CIFS_I(inode)->clientCanCacheRead) | |
643 | /* If the server claims to support oplock on this | |
644 | file, then we still need to check oplock even | |
645 | if the local_lease mount option is set, but there | |
646 | are servers which do not support oplock for which | |
647 | this mount option may be useful if the user | |
648 | knows that the file won't be changed on the server | |
649 | by anyone else */ | |
650 | return generic_setlease(file, arg, lease); | |
651 | else | |
652 | return -EAGAIN; | |
653 | } | |
654 | #endif | |
655 | ||
e6ab1582 | 656 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
657 | .owner = THIS_MODULE, |
658 | .name = "cifs", | |
659 | .get_sb = cifs_get_sb, | |
660 | .kill_sb = kill_anon_super, | |
661 | /* .fs_flags */ | |
662 | }; | |
754661f1 | 663 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
664 | .create = cifs_create, |
665 | .lookup = cifs_lookup, | |
666 | .getattr = cifs_getattr, | |
667 | .unlink = cifs_unlink, | |
668 | .link = cifs_hardlink, | |
669 | .mkdir = cifs_mkdir, | |
670 | .rmdir = cifs_rmdir, | |
671 | .rename = cifs_rename, | |
672 | .permission = cifs_permission, | |
673 | /* revalidate:cifs_revalidate, */ | |
674 | .setattr = cifs_setattr, | |
675 | .symlink = cifs_symlink, | |
676 | .mknod = cifs_mknod, | |
677 | #ifdef CONFIG_CIFS_XATTR | |
678 | .setxattr = cifs_setxattr, | |
679 | .getxattr = cifs_getxattr, | |
680 | .listxattr = cifs_listxattr, | |
681 | .removexattr = cifs_removexattr, | |
682 | #endif | |
683 | }; | |
684 | ||
754661f1 | 685 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
686 | /* revalidate:cifs_revalidate, */ |
687 | .setattr = cifs_setattr, | |
688 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
689 | .rename = cifs_rename, | |
690 | .permission = cifs_permission, | |
691 | #ifdef CONFIG_CIFS_XATTR | |
692 | .setxattr = cifs_setxattr, | |
693 | .getxattr = cifs_getxattr, | |
694 | .listxattr = cifs_listxattr, | |
695 | .removexattr = cifs_removexattr, | |
50c2f753 | 696 | #endif |
1da177e4 LT |
697 | }; |
698 | ||
754661f1 | 699 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 700 | .readlink = generic_readlink, |
1da177e4 LT |
701 | .follow_link = cifs_follow_link, |
702 | .put_link = cifs_put_link, | |
703 | .permission = cifs_permission, | |
704 | /* BB add the following two eventually */ | |
705 | /* revalidate: cifs_revalidate, | |
706 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
707 | #ifdef CONFIG_CIFS_XATTR | |
708 | .setxattr = cifs_setxattr, | |
709 | .getxattr = cifs_getxattr, | |
710 | .listxattr = cifs_listxattr, | |
711 | .removexattr = cifs_removexattr, | |
50c2f753 | 712 | #endif |
1da177e4 LT |
713 | }; |
714 | ||
4b6f5d20 | 715 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
716 | .read = do_sync_read, |
717 | .write = do_sync_write, | |
87c89dd7 SF |
718 | .aio_read = generic_file_aio_read, |
719 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
720 | .open = cifs_open, |
721 | .release = cifs_close, | |
722 | .lock = cifs_lock, | |
723 | .fsync = cifs_fsync, | |
724 | .flush = cifs_flush, | |
725 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 726 | .splice_read = generic_file_splice_read, |
c32a0b68 | 727 | .llseek = cifs_llseek, |
c67593a0 | 728 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 729 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 SF |
730 | #endif /* CONFIG_CIFS_POSIX */ |
731 | ||
1da177e4 | 732 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1da177e4 | 733 | .dir_notify = cifs_dir_notify, |
84210e91 | 734 | .setlease = cifs_setlease, |
1da177e4 LT |
735 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
736 | }; | |
737 | ||
4b6f5d20 | 738 | const struct file_operations cifs_file_direct_ops = { |
50c2f753 | 739 | /* no mmap, no aio, no readv - |
1da177e4 LT |
740 | BB reevaluate whether they can be done with directio, no cache */ |
741 | .read = cifs_user_read, | |
742 | .write = cifs_user_write, | |
743 | .open = cifs_open, | |
744 | .release = cifs_close, | |
745 | .lock = cifs_lock, | |
746 | .fsync = cifs_fsync, | |
747 | .flush = cifs_flush, | |
5ffc4ef4 | 748 | .splice_read = generic_file_splice_read, |
c67593a0 | 749 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 750 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 751 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 752 | .llseek = cifs_llseek, |
1da177e4 LT |
753 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
754 | .dir_notify = cifs_dir_notify, | |
84210e91 | 755 | .setlease = cifs_setlease, |
1da177e4 LT |
756 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
757 | }; | |
4b6f5d20 | 758 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
759 | .read = do_sync_read, |
760 | .write = do_sync_write, | |
87c89dd7 SF |
761 | .aio_read = generic_file_aio_read, |
762 | .aio_write = cifs_file_aio_write, | |
763 | .open = cifs_open, | |
764 | .release = cifs_close, | |
765 | .fsync = cifs_fsync, | |
766 | .flush = cifs_flush, | |
767 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 768 | .splice_read = generic_file_splice_read, |
c32a0b68 | 769 | .llseek = cifs_llseek, |
8b94bcb9 | 770 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 771 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 SF |
772 | #endif /* CONFIG_CIFS_POSIX */ |
773 | ||
774 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
87c89dd7 | 775 | .dir_notify = cifs_dir_notify, |
84210e91 | 776 | .setlease = cifs_setlease, |
8b94bcb9 SF |
777 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
778 | }; | |
779 | ||
4b6f5d20 | 780 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 781 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
782 | BB reevaluate whether they can be done with directio, no cache */ |
783 | .read = cifs_user_read, | |
784 | .write = cifs_user_write, | |
785 | .open = cifs_open, | |
786 | .release = cifs_close, | |
787 | .fsync = cifs_fsync, | |
788 | .flush = cifs_flush, | |
5ffc4ef4 | 789 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 790 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 791 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 792 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 793 | .llseek = cifs_llseek, |
8b94bcb9 | 794 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
87c89dd7 | 795 | .dir_notify = cifs_dir_notify, |
84210e91 | 796 | .setlease = cifs_setlease, |
8b94bcb9 SF |
797 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
798 | }; | |
1da177e4 | 799 | |
4b6f5d20 | 800 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
801 | .readdir = cifs_readdir, |
802 | .release = cifs_closedir, | |
803 | .read = generic_read_dir, | |
804 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
805 | .dir_notify = cifs_dir_notify, | |
806 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
f9ddcca4 | 807 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 808 | .llseek = generic_file_llseek, |
1da177e4 LT |
809 | }; |
810 | ||
811 | static void | |
51cc5068 | 812 | cifs_init_once(void *inode) |
1da177e4 LT |
813 | { |
814 | struct cifsInodeInfo *cifsi = inode; | |
815 | ||
a35afb83 CL |
816 | inode_init_once(&cifsi->vfs_inode); |
817 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
818 | } |
819 | ||
820 | static int | |
821 | cifs_init_inodecache(void) | |
822 | { | |
823 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 824 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
825 | 0, (SLAB_RECLAIM_ACCOUNT| |
826 | SLAB_MEM_SPREAD), | |
20c2df83 | 827 | cifs_init_once); |
1da177e4 LT |
828 | if (cifs_inode_cachep == NULL) |
829 | return -ENOMEM; | |
830 | ||
831 | return 0; | |
832 | } | |
833 | ||
834 | static void | |
835 | cifs_destroy_inodecache(void) | |
836 | { | |
1a1d92c1 | 837 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
838 | } |
839 | ||
840 | static int | |
841 | cifs_init_request_bufs(void) | |
842 | { | |
4523cc30 | 843 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
844 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
845 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
846 | CIFSMaxBufSize = 8192; | |
847 | } else if (CIFSMaxBufSize > 1024*127) { | |
848 | CIFSMaxBufSize = 1024 * 127; | |
849 | } else { | |
850 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
851 | } | |
852 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ | |
853 | cifs_req_cachep = kmem_cache_create("cifs_request", | |
854 | CIFSMaxBufSize + | |
855 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 856 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
857 | if (cifs_req_cachep == NULL) |
858 | return -ENOMEM; | |
859 | ||
4523cc30 | 860 | if (cifs_min_rcv < 1) |
1da177e4 LT |
861 | cifs_min_rcv = 1; |
862 | else if (cifs_min_rcv > 64) { | |
863 | cifs_min_rcv = 64; | |
50c2f753 | 864 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); |
1da177e4 LT |
865 | } |
866 | ||
93d2341c MD |
867 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
868 | cifs_req_cachep); | |
1da177e4 | 869 | |
4523cc30 | 870 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
871 | kmem_cache_destroy(cifs_req_cachep); |
872 | return -ENOMEM; | |
873 | } | |
ec637e3f | 874 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
875 | almost all handle based requests (but not write response, nor is it |
876 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 877 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
878 | for the case in which debug was on, but this larger size allows |
879 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 880 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
881 | alloc of large cifs buffers even when page debugging is on */ |
882 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 883 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 884 | NULL); |
1da177e4 LT |
885 | if (cifs_sm_req_cachep == NULL) { |
886 | mempool_destroy(cifs_req_poolp); | |
887 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 888 | return -ENOMEM; |
1da177e4 LT |
889 | } |
890 | ||
4523cc30 | 891 | if (cifs_min_small < 2) |
1da177e4 LT |
892 | cifs_min_small = 2; |
893 | else if (cifs_min_small > 256) { | |
894 | cifs_min_small = 256; | |
6dc0f87e | 895 | cFYI(1, ("cifs_min_small set to maximum (256)")); |
1da177e4 LT |
896 | } |
897 | ||
93d2341c MD |
898 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
899 | cifs_sm_req_cachep); | |
1da177e4 | 900 | |
4523cc30 | 901 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
902 | mempool_destroy(cifs_req_poolp); |
903 | kmem_cache_destroy(cifs_req_cachep); | |
904 | kmem_cache_destroy(cifs_sm_req_cachep); | |
905 | return -ENOMEM; | |
906 | } | |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
911 | static void | |
912 | cifs_destroy_request_bufs(void) | |
913 | { | |
914 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 915 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 916 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 917 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
918 | } |
919 | ||
920 | static int | |
921 | cifs_init_mids(void) | |
922 | { | |
923 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
924 | sizeof(struct mid_q_entry), 0, |
925 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
926 | if (cifs_mid_cachep == NULL) |
927 | return -ENOMEM; | |
928 | ||
93d2341c MD |
929 | /* 3 is a reasonable minimum number of simultaneous operations */ |
930 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 931 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
932 | kmem_cache_destroy(cifs_mid_cachep); |
933 | return -ENOMEM; | |
934 | } | |
935 | ||
936 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", | |
26f57364 SF |
937 | sizeof(struct oplock_q_entry), 0, |
938 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 | 939 | if (cifs_oplock_cachep == NULL) { |
1da177e4 | 940 | mempool_destroy(cifs_mid_poolp); |
e6985c7f | 941 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
942 | return -ENOMEM; |
943 | } | |
944 | ||
945 | return 0; | |
946 | } | |
947 | ||
948 | static void | |
949 | cifs_destroy_mids(void) | |
950 | { | |
951 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 AD |
952 | kmem_cache_destroy(cifs_mid_cachep); |
953 | kmem_cache_destroy(cifs_oplock_cachep); | |
1da177e4 LT |
954 | } |
955 | ||
50c2f753 | 956 | static int cifs_oplock_thread(void *dummyarg) |
1da177e4 | 957 | { |
6dc0f87e | 958 | struct oplock_q_entry *oplock_item; |
1da177e4 | 959 | struct cifsTconInfo *pTcon; |
6dc0f87e | 960 | struct inode *inode; |
1da177e4 | 961 | __u16 netfid; |
cea21805 | 962 | int rc, waitrc = 0; |
1da177e4 | 963 | |
83144186 | 964 | set_freezable(); |
1da177e4 | 965 | do { |
6dc0f87e | 966 | if (try_to_freeze()) |
ede1327e | 967 | continue; |
50c2f753 | 968 | |
1da177e4 | 969 | spin_lock(&GlobalMid_Lock); |
4523cc30 | 970 | if (list_empty(&GlobalOplock_Q)) { |
1da177e4 LT |
971 | spin_unlock(&GlobalMid_Lock); |
972 | set_current_state(TASK_INTERRUPTIBLE); | |
973 | schedule_timeout(39*HZ); | |
974 | } else { | |
6dc0f87e | 975 | oplock_item = list_entry(GlobalOplock_Q.next, |
ad8b15f0 SF |
976 | struct oplock_q_entry, qhead); |
977 | cFYI(1, ("found oplock item to write out")); | |
978 | pTcon = oplock_item->tcon; | |
979 | inode = oplock_item->pinode; | |
980 | netfid = oplock_item->netfid; | |
981 | spin_unlock(&GlobalMid_Lock); | |
982 | DeleteOplockQEntry(oplock_item); | |
983 | /* can not grab inode sem here since it would | |
6dc0f87e | 984 | deadlock when oplock received on delete |
1b1dcc1b | 985 | since vfs_unlink holds the i_mutex across |
1da177e4 | 986 | the call */ |
ad8b15f0 SF |
987 | /* mutex_lock(&inode->i_mutex);*/ |
988 | if (S_ISREG(inode->i_mode)) { | |
84210e91 SF |
989 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
990 | if (CIFS_I(inode)->clientCanCacheAll == 0) | |
991 | break_lease(inode, FMODE_READ); | |
992 | else if (CIFS_I(inode)->clientCanCacheRead == 0) | |
993 | break_lease(inode, FMODE_WRITE); | |
994 | #endif | |
ad8b15f0 SF |
995 | rc = filemap_fdatawrite(inode->i_mapping); |
996 | if (CIFS_I(inode)->clientCanCacheRead == 0) { | |
997 | waitrc = filemap_fdatawait( | |
998 | inode->i_mapping); | |
999 | invalidate_remote_inode(inode); | |
1000 | } | |
1001 | if (rc == 0) | |
1002 | rc = waitrc; | |
1003 | } else | |
1004 | rc = 0; | |
1005 | /* mutex_unlock(&inode->i_mutex);*/ | |
1006 | if (rc) | |
1007 | CIFS_I(inode)->write_behind_rc = rc; | |
1008 | cFYI(1, ("Oplock flush inode %p rc %d", | |
1009 | inode, rc)); | |
6dc0f87e SF |
1010 | |
1011 | /* releasing stale oplock after recent reconnect | |
1012 | of smb session using a now incorrect file | |
1013 | handle is not a data integrity issue but do | |
1014 | not bother sending an oplock release if session | |
1015 | to server still is disconnected since oplock | |
1da177e4 | 1016 | already released by the server in that case */ |
3b795210 | 1017 | if (!pTcon->need_reconnect) { |
ad8b15f0 SF |
1018 | rc = CIFSSMBLock(0, pTcon, netfid, |
1019 | 0 /* len */ , 0 /* offset */, 0, | |
1020 | 0, LOCKING_ANDX_OPLOCK_RELEASE, | |
1021 | false /* wait flag */); | |
1022 | cFYI(1, ("Oplock release rc = %d", rc)); | |
1023 | } | |
68058e75 SF |
1024 | set_current_state(TASK_INTERRUPTIBLE); |
1025 | schedule_timeout(1); /* yield in case q were corrupt */ | |
1da177e4 | 1026 | } |
45af7a0f SF |
1027 | } while (!kthread_should_stop()); |
1028 | ||
1029 | return 0; | |
1da177e4 LT |
1030 | } |
1031 | ||
50c2f753 | 1032 | static int cifs_dnotify_thread(void *dummyarg) |
8d0d5094 | 1033 | { |
6ab16d24 | 1034 | struct list_head *tmp; |
14fbf50d | 1035 | struct TCP_Server_Info *server; |
6ab16d24 | 1036 | |
8d0d5094 | 1037 | do { |
0fd1ffe0 | 1038 | if (try_to_freeze()) |
16abbecd | 1039 | continue; |
8d0d5094 | 1040 | set_current_state(TASK_INTERRUPTIBLE); |
6ab16d24 | 1041 | schedule_timeout(15*HZ); |
6ab16d24 SF |
1042 | /* check if any stuck requests that need |
1043 | to be woken up and wakeq so the | |
1044 | thread can wake up and error out */ | |
14fbf50d JL |
1045 | read_lock(&cifs_tcp_ses_lock); |
1046 | list_for_each(tmp, &cifs_tcp_ses_list) { | |
1047 | server = list_entry(tmp, struct TCP_Server_Info, | |
1048 | tcp_ses_list); | |
1049 | if (atomic_read(&server->inFlight)) | |
1050 | wake_up_all(&server->response_q); | |
6ab16d24 | 1051 | } |
14fbf50d | 1052 | read_unlock(&cifs_tcp_ses_lock); |
45af7a0f SF |
1053 | } while (!kthread_should_stop()); |
1054 | ||
1055 | return 0; | |
1da177e4 LT |
1056 | } |
1057 | ||
1058 | static int __init | |
1059 | init_cifs(void) | |
1060 | { | |
1061 | int rc = 0; | |
1da177e4 | 1062 | cifs_proc_init(); |
e7ddee90 | 1063 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
1da177e4 | 1064 | INIT_LIST_HEAD(&GlobalOplock_Q); |
4ca9c190 SF |
1065 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1066 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
1067 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 1068 | #endif |
1da177e4 LT |
1069 | /* |
1070 | * Initialize Global counters | |
1071 | */ | |
1072 | atomic_set(&sesInfoAllocCount, 0); | |
1073 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1074 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1075 | atomic_set(&tcpSesReconnectCount, 0); |
1076 | atomic_set(&tconInfoReconnectCount, 0); | |
1077 | ||
1078 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1079 | atomic_set(&smBufAllocCount, 0); |
1080 | #ifdef CONFIG_CIFS_STATS2 | |
1081 | atomic_set(&totBufAllocCount, 0); | |
1082 | atomic_set(&totSmBufAllocCount, 0); | |
1083 | #endif /* CONFIG_CIFS_STATS2 */ | |
1084 | ||
1da177e4 LT |
1085 | atomic_set(&midCount, 0); |
1086 | GlobalCurrentXid = 0; | |
1087 | GlobalTotalActiveXid = 0; | |
1088 | GlobalMaxActiveXid = 0; | |
2cd646a2 | 1089 | memset(Local_System_Name, 0, 15); |
1da177e4 | 1090 | rwlock_init(&GlobalSMBSeslock); |
e7ddee90 | 1091 | rwlock_init(&cifs_tcp_ses_lock); |
1da177e4 LT |
1092 | spin_lock_init(&GlobalMid_Lock); |
1093 | ||
4523cc30 | 1094 | if (cifs_max_pending < 2) { |
1da177e4 | 1095 | cifs_max_pending = 2; |
6dc0f87e | 1096 | cFYI(1, ("cifs_max_pending set to min of 2")); |
4523cc30 | 1097 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1098 | cifs_max_pending = 256; |
6dc0f87e | 1099 | cFYI(1, ("cifs_max_pending set to max of 256")); |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | rc = cifs_init_inodecache(); | |
45af7a0f SF |
1103 | if (rc) |
1104 | goto out_clean_proc; | |
1105 | ||
1106 | rc = cifs_init_mids(); | |
1107 | if (rc) | |
1108 | goto out_destroy_inodecache; | |
1109 | ||
1110 | rc = cifs_init_request_bufs(); | |
1111 | if (rc) | |
1112 | goto out_destroy_mids; | |
1113 | ||
1114 | rc = register_filesystem(&cifs_fs_type); | |
1115 | if (rc) | |
1116 | goto out_destroy_request_bufs; | |
84a15b93 JL |
1117 | #ifdef CONFIG_CIFS_UPCALL |
1118 | rc = register_key_type(&cifs_spnego_key_type); | |
1119 | if (rc) | |
1120 | goto out_unregister_filesystem; | |
6103335d SF |
1121 | #endif |
1122 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1123 | rc = register_key_type(&key_type_dns_resolver); | |
1124 | if (rc) | |
1125 | goto out_unregister_key_type; | |
84a15b93 | 1126 | #endif |
45af7a0f SF |
1127 | oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); |
1128 | if (IS_ERR(oplockThread)) { | |
1129 | rc = PTR_ERR(oplockThread); | |
6dc0f87e | 1130 | cERROR(1, ("error %d create oplock thread", rc)); |
6103335d | 1131 | goto out_unregister_dfs_key_type; |
1da177e4 | 1132 | } |
45af7a0f SF |
1133 | |
1134 | dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); | |
1135 | if (IS_ERR(dnotifyThread)) { | |
1136 | rc = PTR_ERR(dnotifyThread); | |
6dc0f87e | 1137 | cERROR(1, ("error %d create dnotify thread", rc)); |
45af7a0f SF |
1138 | goto out_stop_oplock_thread; |
1139 | } | |
1140 | ||
1141 | return 0; | |
1142 | ||
1143 | out_stop_oplock_thread: | |
1144 | kthread_stop(oplockThread); | |
6103335d SF |
1145 | out_unregister_dfs_key_type: |
1146 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1147 | unregister_key_type(&key_type_dns_resolver); | |
84a15b93 | 1148 | out_unregister_key_type: |
6103335d | 1149 | #endif |
84a15b93 JL |
1150 | #ifdef CONFIG_CIFS_UPCALL |
1151 | unregister_key_type(&cifs_spnego_key_type); | |
45af7a0f | 1152 | out_unregister_filesystem: |
84a15b93 | 1153 | #endif |
45af7a0f SF |
1154 | unregister_filesystem(&cifs_fs_type); |
1155 | out_destroy_request_bufs: | |
1156 | cifs_destroy_request_bufs(); | |
1157 | out_destroy_mids: | |
1158 | cifs_destroy_mids(); | |
1159 | out_destroy_inodecache: | |
1160 | cifs_destroy_inodecache(); | |
1161 | out_clean_proc: | |
1da177e4 | 1162 | cifs_proc_clean(); |
1da177e4 LT |
1163 | return rc; |
1164 | } | |
1165 | ||
1166 | static void __exit | |
1167 | exit_cifs(void) | |
1168 | { | |
90c81e0b | 1169 | cFYI(DBG2, ("exit_cifs")); |
1da177e4 | 1170 | cifs_proc_clean(); |
6103335d | 1171 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1172 | cifs_dfs_release_automount_timer(); |
6103335d SF |
1173 | unregister_key_type(&key_type_dns_resolver); |
1174 | #endif | |
84a15b93 JL |
1175 | #ifdef CONFIG_CIFS_UPCALL |
1176 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1177 | #endif |
1178 | unregister_filesystem(&cifs_fs_type); | |
1179 | cifs_destroy_inodecache(); | |
1180 | cifs_destroy_mids(); | |
1181 | cifs_destroy_request_bufs(); | |
45af7a0f SF |
1182 | kthread_stop(oplockThread); |
1183 | kthread_stop(dnotifyThread); | |
1da177e4 LT |
1184 | } |
1185 | ||
1186 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1187 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1188 | MODULE_DESCRIPTION |
63135e08 SF |
1189 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1190 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1191 | MODULE_VERSION(CIFS_VERSION); |
1192 | module_init(init_cifs) | |
1193 | module_exit(exit_cifs) |