4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License as published
10 * by the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU Lesser General Public License for more details.
23 #include <linux/in6.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include "cifs_fs_sb.h"
28 #include <crypto/internal/hash.h>
29 #include <linux/scatterlist.h>
32 * The sizes of various internal tables and strings
34 #define MAX_UID_INFO 16
35 #define MAX_SES_INFO 2
36 #define MAX_TCON_INFO 4
38 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
39 #define MAX_SERVER_SIZE 15
40 #define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
41 #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
42 termination then *2 for unicode versions */
43 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
45 #define CIFS_MIN_RCV_POOL 4
48 * MAX_REQ is the maximum number of requests that WE will send
49 * on one socket concurrently. It also matches the most common
50 * value of max multiplex returned by servers. We may
51 * eventually want to use the negotiated value (in case
52 * future servers can handle more) when we are more confident that
53 * we will not have problems oveloading the socket with pending
56 #define CIFS_MAX_REQ 50
58 #define RFC1001_NAME_LEN 15
59 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
61 /* currently length of NIP6_FMT */
62 #define SERVER_NAME_LENGTH 40
63 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
65 /* used to define string lengths for reversing unicode strings */
67 /* (max path length + 1 for null) * 2 for unicode */
72 #ifndef XATTR_DOS_ATTRIB
73 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
77 * CIFS vfs client Status information (based on what we know.)
80 /* associated with each tcp and smb session */
89 LANMAN
= 0, /* Legacy LANMAN auth */
90 NTLM
, /* Legacy NTLM012 auth with NTLM hash */
91 NTLMv2
, /* Legacy NTLM auth with NTLMv2 hash */
92 RawNTLMSSP
, /* NTLMSSP without SPNEGO, NTLMv2 hash */
93 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
94 Kerberos
, /* Kerberos via SPNEGO */
100 /* Netbios frames protocol not supported at this time */
106 char ntlm
[CIFS_SESS_KEY_SIZE
+ 16];
107 char krb5
[CIFS_SESS_KEY_SIZE
+ 16]; /* BB: length correct? */
110 struct ntlmv2_resp resp
;
120 struct cifs_sid osid
;
121 struct cifs_sid gsid
;
122 struct cifs_ntace
*ntaces
;
123 struct cifs_ace
*aces
;
127 struct shash_desc shash
;
131 struct ntlmssp_auth
{
134 unsigned char ciphertext
[CIFS_CPHTXT_SIZE
];
135 struct crypto_shash
*hmacmd5
;
136 struct crypto_shash
*md5
;
137 struct sdesc
*sdeschmacmd5
;
138 struct sdesc
*sdescmd5
;
142 *****************************************************************
143 * Except the CIFS PDUs themselves all the
144 * globally interesting structs should go here
145 *****************************************************************
148 struct TCP_Server_Info
{
149 struct list_head tcp_ses_list
;
150 struct list_head smb_ses_list
;
151 int srv_count
; /* reference counter */
152 /* 15 character server name + 0x20 16th byte indicating type = srv */
153 char server_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
154 char *hostname
; /* hostname portion of UNC string */
155 struct socket
*ssocket
;
157 struct sockaddr_in sockAddr
;
158 struct sockaddr_in6 sockAddr6
;
160 wait_queue_head_t response_q
;
161 wait_queue_head_t request_q
; /* if more than maxmpx to srvr must block*/
162 struct list_head pending_mid_q
;
163 void *Server_NlsInfo
; /* BB - placeholder for future NLS info */
164 unsigned short server_codepage
; /* codepage for the server */
165 enum protocolEnum protocolType
;
168 bool svlocal
:1; /* local server or remote */
169 bool noblocksnd
; /* use blocking sendmsg */
170 bool noautotune
; /* do not autotune send buf sizes */
172 atomic_t inFlight
; /* number of requests on the wire to server */
173 #ifdef CONFIG_CIFS_STATS2
174 atomic_t inSend
; /* requests trying to send */
175 atomic_t num_waiters
; /* blocked waiting to get in sendrecv */
177 enum statusEnum tcpStatus
; /* what we think the status is */
178 struct mutex srv_mutex
;
179 struct task_struct
*tsk
;
180 char server_GUID
[16];
182 enum securityEnum secType
;
183 unsigned int maxReq
; /* Clients should submit no more */
184 /* than maxReq distinct unanswered SMBs to the server when using */
185 /* multiplexed reads or writes */
186 unsigned int maxBuf
; /* maxBuf specifies the maximum */
187 /* message size the server can send or receive for non-raw SMBs */
188 unsigned int max_rw
; /* maxRw specifies the maximum */
189 /* message size the server can send or receive for */
190 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
191 unsigned int max_vcs
; /* maximum number of smb sessions, at least
192 those that can be specified uniquely with
194 char sessid
[4]; /* unique token id for this session */
195 /* (returned on Negotiate */
196 int capabilities
; /* allow selective disabling of caps by smb sess */
197 int timeAdj
; /* Adjust for difference in server time zone in sec */
198 __u16 CurrentMid
; /* multiplex id - rotating counter */
199 char cryptKey
[CIFS_CRYPTO_KEY_SIZE
];
200 /* 16th byte of RFC1001 workstation name is always null */
201 char workstation_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
202 __u32 sequence_number
; /* needed for CIFS PDU signature */
203 struct session_key session_key
;
204 char ntlmv2_hash
[16];
205 unsigned long lstrp
; /* when we got last response from this server */
206 u16 dialect
; /* dialect index that server chose */
207 /* extended security flavors that server supports */
208 unsigned int tilen
; /* length of the target info blob */
209 unsigned char *tiblob
; /* target info blob in challenge response */
210 struct ntlmssp_auth ntlmssp
; /* various keys, ciphers, flags */
211 bool sec_kerberos
; /* supports plain Kerberos */
212 bool sec_mskerberos
; /* supports legacy MS Kerberos */
213 bool sec_kerberosu2u
; /* supports U2U Kerberos */
214 bool sec_ntlmssp
; /* supports NTLMSSP */
215 #ifdef CONFIG_CIFS_FSCACHE
216 struct fscache_cookie
*fscache
; /* client index cache cookie */
221 * Session structure. One of these for each uid session with a particular host
224 struct list_head smb_ses_list
;
225 struct list_head tcon_list
;
226 struct mutex session_mutex
;
227 struct TCP_Server_Info
*server
; /* pointer to server info */
228 int ses_count
; /* reference counter */
229 enum statusEnum status
;
230 unsigned overrideSecFlg
; /* if non-zero override global sec flags */
231 __u16 ipc_tid
; /* special tid for connection to IPC share */
234 char *serverOS
; /* name of operating system underlying server */
235 char *serverNOS
; /* name of network operating system of server */
236 char *serverDomain
; /* security realm of server */
237 int Suid
; /* remote smb uid */
238 uid_t linux_uid
; /* overriding owner of files on the mount */
239 uid_t cred_uid
; /* owner of credentials */
241 char serverName
[SERVER_NAME_LEN_WITH_NULL
* 2]; /* BB make bigger for
242 TCP names - will ipv6 and sctp addresses fit? */
243 char userName
[MAX_USERNAME_SIZE
+ 1];
246 bool need_reconnect
:1; /* connection reset, uid now invalid */
248 /* no more than one of the following three session flags may be set */
249 #define CIFS_SES_NT4 1
250 #define CIFS_SES_OS2 2
251 #define CIFS_SES_W9X 4
252 /* following flag is set for old servers such as OS2 (and Win95?)
253 which do not negotiate NTLM or POSIX dialects, but instead
254 negotiate one of the older LANMAN dialects */
255 #define CIFS_SES_LANMAN 8
257 * there is one of these for each connection to a resource on a particular
260 struct cifsTconInfo
{
261 struct list_head tcon_list
;
263 struct list_head openFileList
;
264 struct cifsSesInfo
*ses
; /* pointer to session associated with */
265 char treeName
[MAX_TREE_SIZE
+ 1]; /* UNC name of resource in ASCII */
266 char *nativeFileSystem
;
267 char *password
; /* for share-level security */
268 __u16 tid
; /* The 2 byte tree id */
269 __u16 Flags
; /* optional support bits */
270 enum statusEnum tidStatus
;
271 #ifdef CONFIG_CIFS_STATS
272 atomic_t num_smbs_sent
;
275 atomic_t num_flushes
;
276 atomic_t num_oplock_brks
;
279 atomic_t num_deletes
;
281 atomic_t num_posixopens
;
282 atomic_t num_posixmkdirs
;
284 atomic_t num_renames
;
285 atomic_t num_t2renames
;
289 atomic_t num_hardlinks
;
290 atomic_t num_symlinks
;
292 atomic_t num_acl_get
;
293 atomic_t num_acl_set
;
294 #ifdef CONFIG_CIFS_STATS2
295 unsigned long long time_writes
;
296 unsigned long long time_reads
;
297 unsigned long long time_opens
;
298 unsigned long long time_deletes
;
299 unsigned long long time_closes
;
300 unsigned long long time_mkdirs
;
301 unsigned long long time_rmdirs
;
302 unsigned long long time_renames
;
303 unsigned long long time_t2renames
;
304 unsigned long long time_ffirst
;
305 unsigned long long time_fnext
;
306 unsigned long long time_fclose
;
307 #endif /* CONFIG_CIFS_STATS2 */
310 spinlock_t stat_lock
;
311 #endif /* CONFIG_CIFS_STATS */
312 FILE_SYSTEM_DEVICE_INFO fsDevInfo
;
313 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo
; /* ok if fs name truncated */
314 FILE_SYSTEM_UNIX_INFO fsUnixInfo
;
315 bool ipc
:1; /* set if connection to IPC$ eg for RPC/PIPES */
318 bool seal
:1; /* transport encryption for this mounted share */
319 bool unix_ext
:1; /* if false disable Linux extensions to CIFS protocol
320 for this mount even if server would support */
321 bool local_lease
:1; /* check leases (only) on local system not remote */
322 bool broken_posix_open
; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
323 bool need_reconnect
:1; /* connection reset, tid now invalid */
324 #ifdef CONFIG_CIFS_FSCACHE
325 u64 resource_id
; /* server resource id */
326 struct fscache_cookie
*fscache
; /* cookie for share */
328 /* BB add field for back pointer to sb struct(s)? */
332 * This info hangs off the cifsFileInfo structure, pointed to by llist.
333 * This is used to track byte stream locks on the file
335 struct cifsLockInfo
{
336 struct list_head llist
; /* pointer to next cifsLockInfo */
343 * One of these for each open instance of a file
345 struct cifs_search_info
{
346 loff_t index_of_last_entry
;
347 __u16 entries_in_buffer
;
350 char *ntwrk_buf_start
;
351 char *srch_entries_start
;
354 unsigned int resume_name_len
;
358 bool smallBuf
:1; /* so we know which buf_release function to call */
361 struct cifsFileInfo
{
362 struct list_head tlist
; /* pointer to next fid owned by tcon */
363 struct list_head flist
; /* next fid (file instance) for this inode */
364 unsigned int uid
; /* allows finding which FileInfo structure */
365 __u32 pid
; /* process id who opened file */
366 __u16 netfid
; /* file id from remote */
367 /* BB add lock scope info here if needed */ ;
368 /* lock scope id (0 if none) */
369 struct file
*pfile
; /* needed for writepage */
370 struct inode
*pInode
; /* needed for oplock break */
371 struct vfsmount
*mnt
;
372 struct mutex lock_mutex
;
373 struct list_head llist
; /* list of byte range locks we have. */
374 bool closePend
:1; /* file is marked to close */
375 bool invalidHandle
:1; /* file closed via session abend */
376 bool oplock_break_cancelled
:1;
377 atomic_t count
; /* reference count */
378 struct mutex fh_mutex
; /* prevents reopen race after dead ses*/
379 struct cifs_search_info srch_inf
;
380 struct work_struct oplock_break
; /* work for oplock breaks */
383 /* Take a reference on the file private data */
384 static inline void cifsFileInfo_get(struct cifsFileInfo
*cifs_file
)
386 atomic_inc(&cifs_file
->count
);
389 /* Release a reference on the file private data */
390 static inline void cifsFileInfo_put(struct cifsFileInfo
*cifs_file
)
392 if (atomic_dec_and_test(&cifs_file
->count
)) {
393 iput(cifs_file
->pInode
);
399 * One of these for each file inode
402 struct cifsInodeInfo
{
403 struct list_head lockList
;
404 /* BB add in lists for dirty pages i.e. write caching info for oplock */
405 struct list_head openFileList
;
407 __u32 cifsAttrs
; /* e.g. DOS archive bit, sparse, compressed, system */
408 unsigned long time
; /* jiffies of last update/check of inode */
409 bool clientCanCacheRead
:1; /* read oplock */
410 bool clientCanCacheAll
:1; /* read and writebehind oplock */
411 bool delete_pending
:1; /* DELETE_ON_CLOSE is set */
412 bool invalid_mapping
:1; /* pagecache is invalid */
413 u64 server_eof
; /* current file size on server */
414 u64 uniqueid
; /* server inode number */
415 #ifdef CONFIG_CIFS_FSCACHE
416 struct fscache_cookie
*fscache
;
418 struct inode vfs_inode
;
421 static inline struct cifsInodeInfo
*
422 CIFS_I(struct inode
*inode
)
424 return container_of(inode
, struct cifsInodeInfo
, vfs_inode
);
427 static inline struct cifs_sb_info
*
428 CIFS_SB(struct super_block
*sb
)
430 return sb
->s_fs_info
;
433 static inline char CIFS_DIR_SEP(const struct cifs_sb_info
*cifs_sb
)
435 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
441 #ifdef CONFIG_CIFS_STATS
442 #define cifs_stats_inc atomic_inc
444 static inline void cifs_stats_bytes_written(struct cifsTconInfo
*tcon
,
448 spin_lock(&tcon
->stat_lock
);
449 tcon
->bytes_written
+= bytes
;
450 spin_unlock(&tcon
->stat_lock
);
454 static inline void cifs_stats_bytes_read(struct cifsTconInfo
*tcon
,
457 spin_lock(&tcon
->stat_lock
);
458 tcon
->bytes_read
+= bytes
;
459 spin_unlock(&tcon
->stat_lock
);
463 #define cifs_stats_inc(field) do {} while (0)
464 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
465 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
469 /* one of these for every pending CIFS request to the server */
471 struct list_head qhead
; /* mids waiting on reply from this server */
472 __u16 mid
; /* multiplex id */
473 __u16 pid
; /* process id */
474 __u32 sequence_number
; /* for CIFS signing */
475 unsigned long when_alloc
; /* when mid was created */
476 #ifdef CONFIG_CIFS_STATS2
477 unsigned long when_sent
; /* time when smb send finished */
478 unsigned long when_received
; /* when demux complete (taken off wire) */
480 struct task_struct
*tsk
; /* task waiting for response */
481 struct smb_hdr
*resp_buf
; /* response buffer */
482 int midState
; /* wish this were enum but can not pass to wait_event */
483 __u8 command
; /* smb command code */
484 bool largeBuf
:1; /* if valid response, is pointer to large buf */
485 bool multiRsp
:1; /* multiple trans2 responses for one request */
486 bool multiEnd
:1; /* both received */
489 struct oplock_q_entry
{
490 struct list_head qhead
;
491 struct inode
*pinode
;
492 struct cifsTconInfo
*tcon
;
496 /* for pending dnotify requests */
497 struct dir_notify_req
{
498 struct list_head lhead
;
505 __u32 filter
; /* CompletionFilter (for multishot) */
510 struct dfs_info3_param
{
511 int flags
; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
520 * common struct for holding inode info when searching for or updating an
521 * inode with new info
524 #define CIFS_FATTR_DFS_REFERRAL 0x1
525 #define CIFS_FATTR_DELETE_PENDING 0x2
526 #define CIFS_FATTR_NEED_REVAL 0x4
527 #define CIFS_FATTR_INO_COLLISION 0x8
539 unsigned int cf_nlink
;
540 unsigned int cf_dtype
;
541 struct timespec cf_atime
;
542 struct timespec cf_mtime
;
543 struct timespec cf_ctime
;
546 static inline void free_dfs_info_param(struct dfs_info3_param
*param
)
549 kfree(param
->path_name
);
550 kfree(param
->node_name
);
555 static inline void free_dfs_info_array(struct dfs_info3_param
*param
,
559 if ((number_of_items
== 0) || (param
== NULL
))
561 for (i
= 0; i
< number_of_items
; i
++) {
562 kfree(param
[i
].path_name
);
563 kfree(param
[i
].node_name
);
569 #define MID_REQUEST_ALLOCATED 1
570 #define MID_REQUEST_SUBMITTED 2
571 #define MID_RESPONSE_RECEIVED 4
572 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
573 #define MID_NO_RESP_NEEDED 0x10
575 /* Types of response buffer returned from SendReceive2 */
576 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
577 #define CIFS_SMALL_BUFFER 1
578 #define CIFS_LARGE_BUFFER 2
579 #define CIFS_IOVEC 4 /* array of response buffers */
581 /* Type of Request to SendReceive2 */
582 #define CIFS_STD_OP 0 /* normal request timeout */
583 #define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
584 #define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
585 #define CIFS_BLOCKING_OP 4 /* operation can block */
586 #define CIFS_ASYNC_OP 8 /* do not wait for response */
587 #define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
588 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
589 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
590 #define CIFS_NO_RESP 0x040 /* no response buffer required */
592 /* Security Flags: indicate type of session setup needed */
593 #define CIFSSEC_MAY_SIGN 0x00001
594 #define CIFSSEC_MAY_NTLM 0x00002
595 #define CIFSSEC_MAY_NTLMV2 0x00004
596 #define CIFSSEC_MAY_KRB5 0x00008
597 #ifdef CONFIG_CIFS_WEAK_PW_HASH
598 #define CIFSSEC_MAY_LANMAN 0x00010
599 #define CIFSSEC_MAY_PLNTXT 0x00020
601 #define CIFSSEC_MAY_LANMAN 0
602 #define CIFSSEC_MAY_PLNTXT 0
603 #endif /* weak passwords */
604 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
605 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
607 #define CIFSSEC_MUST_SIGN 0x01001
608 /* note that only one of the following can be set so the
609 result of setting MUST flags more than once will be to
610 require use of the stronger protocol */
611 #define CIFSSEC_MUST_NTLM 0x02002
612 #define CIFSSEC_MUST_NTLMV2 0x04004
613 #define CIFSSEC_MUST_KRB5 0x08008
614 #ifdef CONFIG_CIFS_WEAK_PW_HASH
615 #define CIFSSEC_MUST_LANMAN 0x10010
616 #define CIFSSEC_MUST_PLNTXT 0x20020
617 #ifdef CONFIG_CIFS_UPCALL
618 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
620 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
622 #else /* do not allow weak pw hash */
623 #ifdef CONFIG_CIFS_UPCALL
624 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
626 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
628 #endif /* WEAK_PW_HASH */
629 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
630 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
632 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
633 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
634 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
636 *****************************************************************
637 * All constants go here
638 *****************************************************************
641 #define UID_HASH (16)
644 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
645 * following to be declared.
648 /****************************************************************************
649 * Locking notes. All updates to global variables and lists should be
650 * protected by spinlocks or semaphores.
654 * GlobalMid_Lock protects:
655 * list operations on pending_mid_q and oplockQ
656 * updates to XID counters, multiplex id and SMB sequence numbers
657 * GlobalSMBSesLock protects:
658 * list operations on tcp and SMB session lists and tCon lists
659 * f_owner.lock protects certain per file struct operations
660 * mapping->page_lock protects certain per page operations
664 * sesSem operations on smb session
665 * tconSem operations on tree connection
666 * fh_sem file handle reconnection operations
668 ****************************************************************************/
670 #ifdef DECLARE_GLOBALS_HERE
671 #define GLOBAL_EXTERN
673 #define GLOBAL_EXTERN extern
677 * the list of TCP_Server_Info structures, ie each of the sockets
678 * connecting our client to a distinct server (ip address), is
679 * chained together by cifs_tcp_ses_list. The list of all our SMB
680 * sessions (and from that the tree connections) can be found
681 * by iterating over cifs_tcp_ses_list
683 GLOBAL_EXTERN
struct list_head cifs_tcp_ses_list
;
686 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
687 * tcp session, and the list of tcon's per smb session. It also protects
688 * the reference counters for the server, smb session, and tcon. Finally,
689 * changes to the tcon->tidStatus should be done while holding this lock.
691 GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock
;
694 * This lock protects the cifs_file->llist and cifs_file->flist
695 * list operations, and updates to some flags (cifs_file->invalidHandle)
696 * It will be moved to either use the tcon->stat_lock or equivalent later.
697 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
698 * the cifs_tcp_ses_lock must be grabbed first and released last.
700 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock
;
702 /* Outstanding dir notify requests */
703 GLOBAL_EXTERN
struct list_head GlobalDnotifyReqList
;
704 /* DirNotify response queue */
705 GLOBAL_EXTERN
struct list_head GlobalDnotifyRsp_Q
;
708 * Global transaction id (XID) information
710 GLOBAL_EXTERN
unsigned int GlobalCurrentXid
; /* protected by GlobalMid_Sem */
711 GLOBAL_EXTERN
unsigned int GlobalTotalActiveXid
; /* prot by GlobalMid_Sem */
712 GLOBAL_EXTERN
unsigned int GlobalMaxActiveXid
; /* prot by GlobalMid_Sem */
713 GLOBAL_EXTERN spinlock_t GlobalMid_Lock
; /* protects above & list operations */
714 /* on midQ entries */
715 GLOBAL_EXTERN
char Local_System_Name
[15];
718 * Global counters, updated atomically
720 GLOBAL_EXTERN atomic_t sesInfoAllocCount
;
721 GLOBAL_EXTERN atomic_t tconInfoAllocCount
;
722 GLOBAL_EXTERN atomic_t tcpSesAllocCount
;
723 GLOBAL_EXTERN atomic_t tcpSesReconnectCount
;
724 GLOBAL_EXTERN atomic_t tconInfoReconnectCount
;
726 /* Various Debug counters */
727 GLOBAL_EXTERN atomic_t bufAllocCount
; /* current number allocated */
728 #ifdef CONFIG_CIFS_STATS2
729 GLOBAL_EXTERN atomic_t totBufAllocCount
; /* total allocated over all time */
730 GLOBAL_EXTERN atomic_t totSmBufAllocCount
;
732 GLOBAL_EXTERN atomic_t smBufAllocCount
;
733 GLOBAL_EXTERN atomic_t midCount
;
736 GLOBAL_EXTERN
unsigned int multiuser_mount
; /* if enabled allows new sessions
737 to be established on existing mount if we
738 have the uid/password or Kerberos credential
739 or equivalent for current user */
740 GLOBAL_EXTERN
unsigned int oplockEnabled
;
741 GLOBAL_EXTERN
unsigned int experimEnabled
;
742 GLOBAL_EXTERN
unsigned int lookupCacheEnabled
;
743 GLOBAL_EXTERN
unsigned int global_secflags
; /* if on, session setup sent
744 with more secure ntlmssp2 challenge/resp */
745 GLOBAL_EXTERN
unsigned int sign_CIFS_PDUs
; /* enable smb packet signing */
746 GLOBAL_EXTERN
unsigned int linuxExtEnabled
;/*enable Linux/Unix CIFS extensions*/
747 GLOBAL_EXTERN
unsigned int CIFSMaxBufSize
; /* max size not including hdr */
748 GLOBAL_EXTERN
unsigned int cifs_min_rcv
; /* min size of big ntwrk buf pool */
749 GLOBAL_EXTERN
unsigned int cifs_min_small
; /* min size of small buf pool */
750 GLOBAL_EXTERN
unsigned int cifs_max_pending
; /* MAX requests at once to server*/
752 void cifs_oplock_break(struct work_struct
*work
);
753 void cifs_oplock_break_get(struct cifsFileInfo
*cfile
);
754 void cifs_oplock_break_put(struct cifsFileInfo
*cfile
);
756 extern const struct slow_work_ops cifs_oplock_break_ops
;
758 #endif /* _CIFS_GLOB_H */