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/slow-work.h>
26 #include "cifs_fs_sb.h"
29 * The sizes of various internal tables and strings
31 #define MAX_UID_INFO 16
32 #define MAX_SES_INFO 2
33 #define MAX_TCON_INFO 4
35 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
36 #define MAX_SERVER_SIZE 15
37 #define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
38 #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
39 termination then *2 for unicode versions */
40 #define MAX_PASSWORD_SIZE 16
42 #define CIFS_MIN_RCV_POOL 4
45 * MAX_REQ is the maximum number of requests that WE will send
46 * on one socket concurrently. It also matches the most common
47 * value of max multiplex returned by servers. We may
48 * eventually want to use the negotiated value (in case
49 * future servers can handle more) when we are more confident that
50 * we will not have problems oveloading the socket with pending
53 #define CIFS_MAX_REQ 50
55 #define RFC1001_NAME_LEN 15
56 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
58 /* currently length of NIP6_FMT */
59 #define SERVER_NAME_LENGTH 40
60 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
62 /* used to define string lengths for reversing unicode strings */
64 /* (max path length + 1 for null) * 2 for unicode */
69 #ifndef XATTR_DOS_ATTRIB
70 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
74 * CIFS vfs client Status information (based on what we know.)
77 /* associated with each tcp and smb session */
86 PLAINTXT = 0, /* Legacy with Plaintext passwords */
87 LANMAN, /* Legacy LANMAN auth */
88 NTLM, /* Legacy NTLM012 auth with NTLM hash */
89 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
90 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
91 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
92 Kerberos, /* Kerberos via SPNEGO */
98 /* Netbios frames protocol not supported at this time */
104 char ntlm[CIFS_SESS_KEY_SIZE + 16];
105 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
108 struct ntlmv2_resp resp;
118 struct cifs_sid osid;
119 struct cifs_sid gsid;
120 struct cifs_ntace *ntaces;
121 struct cifs_ace *aces;
125 *****************************************************************
126 * Except the CIFS PDUs themselves all the
127 * globally interesting structs should go here
128 *****************************************************************
131 struct TCP_Server_Info {
132 struct list_head tcp_ses_list;
133 struct list_head smb_ses_list;
134 int srv_count; /* reference counter */
135 /* 15 character server name + 0x20 16th byte indicating type = srv */
136 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
137 char *hostname; /* hostname portion of UNC string */
138 struct socket *ssocket;
140 struct sockaddr_in sockAddr;
141 struct sockaddr_in6 sockAddr6;
143 wait_queue_head_t response_q;
144 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
145 struct list_head pending_mid_q;
146 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
147 unsigned short server_codepage; /* codepage for the server */
148 unsigned long ip_address; /* IP addr for the server if known */
149 enum protocolEnum protocolType;
152 bool svlocal:1; /* local server or remote */
153 bool noblocksnd; /* use blocking sendmsg */
154 bool noautotune; /* do not autotune send buf sizes */
156 atomic_t inFlight; /* number of requests on the wire to server */
157 #ifdef CONFIG_CIFS_STATS2
158 atomic_t inSend; /* requests trying to send */
159 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
161 enum statusEnum tcpStatus; /* what we think the status is */
162 struct mutex srv_mutex;
163 struct task_struct *tsk;
164 char server_GUID[16];
166 enum securityEnum secType;
167 unsigned int maxReq; /* Clients should submit no more */
168 /* than maxReq distinct unanswered SMBs to the server when using */
169 /* multiplexed reads or writes */
170 unsigned int maxBuf; /* maxBuf specifies the maximum */
171 /* message size the server can send or receive for non-raw SMBs */
172 unsigned int max_rw; /* maxRw specifies the maximum */
173 /* message size the server can send or receive for */
174 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
175 unsigned int max_vcs; /* maximum number of smb sessions, at least
176 those that can be specified uniquely with
178 char sessid[4]; /* unique token id for this session */
179 /* (returned on Negotiate */
180 int capabilities; /* allow selective disabling of caps by smb sess */
181 int timeAdj; /* Adjust for difference in server time zone in sec */
182 __u16 CurrentMid; /* multiplex id - rotating counter */
183 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
184 /* 16th byte of RFC1001 workstation name is always null */
185 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
186 __u32 sequence_number; /* needed for CIFS PDU signature */
187 struct mac_key mac_signing_key;
188 char ntlmv2_hash[16];
189 unsigned long lstrp; /* when we got last response from this server */
190 u16 dialect; /* dialect index that server chose */
191 /* extended security flavors that server supports */
192 bool sec_kerberos; /* supports plain Kerberos */
193 bool sec_mskerberos; /* supports legacy MS Kerberos */
194 bool sec_kerberosu2u; /* supports U2U Kerberos */
195 bool sec_ntlmssp; /* supports NTLMSSP */
199 * The following is our shortcut to user information. We surface the uid,
200 * and name. We always get the password on the fly in case it
201 * has changed. We also hang a list of sessions owned by this user off here.
204 struct list_head userList;
205 struct list_head sessionList; /* SMB sessions for this user */
207 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
208 /* BB may need ptr or callback for PAM or WinBind info */
212 * Session structure. One of these for each uid session with a particular host
215 struct list_head smb_ses_list;
216 struct list_head tcon_list;
217 struct mutex session_mutex;
219 struct cifsUidInfo *uidInfo; /* pointer to user info */
221 struct TCP_Server_Info *server; /* pointer to server info */
222 int ses_count; /* reference counter */
223 enum statusEnum status;
224 unsigned overrideSecFlg; /* if non-zero override global sec flags */
225 __u16 ipc_tid; /* special tid for connection to IPC share */
228 char *serverOS; /* name of operating system underlying server */
229 char *serverNOS; /* name of network operating system of server */
230 char *serverDomain; /* security realm of server */
231 int Suid; /* remote smb uid */
232 uid_t linux_uid; /* local Linux uid */
234 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
235 TCP names - will ipv6 and sctp addresses fit? */
236 char userName[MAX_USERNAME_SIZE + 1];
239 bool need_reconnect:1; /* connection reset, uid now invalid */
241 /* no more than one of the following three session flags may be set */
242 #define CIFS_SES_NT4 1
243 #define CIFS_SES_OS2 2
244 #define CIFS_SES_W9X 4
245 /* following flag is set for old servers such as OS2 (and Win95?)
246 which do not negotiate NTLM or POSIX dialects, but instead
247 negotiate one of the older LANMAN dialects */
248 #define CIFS_SES_LANMAN 8
250 * there is one of these for each connection to a resource on a particular
253 struct cifsTconInfo {
254 struct list_head tcon_list;
256 struct list_head openFileList;
257 struct cifsSesInfo *ses; /* pointer to session associated with */
258 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
259 char *nativeFileSystem;
260 char *password; /* for share-level security */
261 __u16 tid; /* The 2 byte tree id */
262 __u16 Flags; /* optional support bits */
263 enum statusEnum tidStatus;
264 #ifdef CONFIG_CIFS_STATS
265 atomic_t num_smbs_sent;
268 atomic_t num_flushes;
269 atomic_t num_oplock_brks;
272 atomic_t num_deletes;
274 atomic_t num_posixopens;
275 atomic_t num_posixmkdirs;
277 atomic_t num_renames;
278 atomic_t num_t2renames;
282 atomic_t num_hardlinks;
283 atomic_t num_symlinks;
285 atomic_t num_acl_get;
286 atomic_t num_acl_set;
287 #ifdef CONFIG_CIFS_STATS2
288 unsigned long long time_writes;
289 unsigned long long time_reads;
290 unsigned long long time_opens;
291 unsigned long long time_deletes;
292 unsigned long long time_closes;
293 unsigned long long time_mkdirs;
294 unsigned long long time_rmdirs;
295 unsigned long long time_renames;
296 unsigned long long time_t2renames;
297 unsigned long long time_ffirst;
298 unsigned long long time_fnext;
299 unsigned long long time_fclose;
300 #endif /* CONFIG_CIFS_STATS2 */
303 spinlock_t stat_lock;
304 #endif /* CONFIG_CIFS_STATS */
305 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
306 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
307 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
308 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
311 bool seal:1; /* transport encryption for this mounted share */
312 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
313 for this mount even if server would support */
314 bool local_lease:1; /* check leases (only) on local system not remote */
315 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
316 bool need_reconnect:1; /* connection reset, tid now invalid */
317 /* BB add field for back pointer to sb struct(s)? */
321 * This info hangs off the cifsFileInfo structure, pointed to by llist.
322 * This is used to track byte stream locks on the file
324 struct cifsLockInfo {
325 struct list_head llist; /* pointer to next cifsLockInfo */
332 * One of these for each open instance of a file
334 struct cifs_search_info {
335 loff_t index_of_last_entry;
336 __u16 entries_in_buffer;
339 char *ntwrk_buf_start;
340 char *srch_entries_start;
343 unsigned int resume_name_len;
347 bool smallBuf:1; /* so we know which buf_release function to call */
350 struct cifsFileInfo {
351 struct list_head tlist; /* pointer to next fid owned by tcon */
352 struct list_head flist; /* next fid (file instance) for this inode */
353 unsigned int uid; /* allows finding which FileInfo structure */
354 __u32 pid; /* process id who opened file */
355 __u16 netfid; /* file id from remote */
356 /* BB add lock scope info here if needed */ ;
357 /* lock scope id (0 if none) */
358 struct file *pfile; /* needed for writepage */
359 struct inode *pInode; /* needed for oplock break */
360 struct vfsmount *mnt;
361 struct mutex lock_mutex;
362 struct list_head llist; /* list of byte range locks we have. */
363 bool closePend:1; /* file is marked to close */
364 bool invalidHandle:1; /* file closed via session abend */
365 bool oplock_break_cancelled:1;
366 atomic_t count; /* reference count */
367 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
368 struct cifs_search_info srch_inf;
369 struct slow_work oplock_break; /* slow_work job for oplock breaks */
372 /* Take a reference on the file private data */
373 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
375 atomic_inc(&cifs_file->count);
378 /* Release a reference on the file private data */
379 static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
381 if (atomic_dec_and_test(&cifs_file->count)) {
382 iput(cifs_file->pInode);
388 * One of these for each file inode
391 struct cifsInodeInfo {
392 struct list_head lockList;
393 /* BB add in lists for dirty pages i.e. write caching info for oplock */
394 struct list_head openFileList;
396 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
397 unsigned long time; /* jiffies of last update/check of inode */
398 bool clientCanCacheRead:1; /* read oplock */
399 bool clientCanCacheAll:1; /* read and writebehind oplock */
400 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
401 bool invalid_mapping:1; /* pagecache is invalid */
402 u64 server_eof; /* current file size on server */
403 u64 uniqueid; /* server inode number */
404 struct inode vfs_inode;
407 static inline struct cifsInodeInfo *
408 CIFS_I(struct inode *inode)
410 return container_of(inode, struct cifsInodeInfo, vfs_inode);
413 static inline struct cifs_sb_info *
414 CIFS_SB(struct super_block *sb)
416 return sb->s_fs_info;
419 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
421 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
427 #ifdef CONFIG_CIFS_STATS
428 #define cifs_stats_inc atomic_inc
430 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
434 spin_lock(&tcon->stat_lock);
435 tcon->bytes_written += bytes;
436 spin_unlock(&tcon->stat_lock);
440 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
443 spin_lock(&tcon->stat_lock);
444 tcon->bytes_read += bytes;
445 spin_unlock(&tcon->stat_lock);
449 #define cifs_stats_inc(field) do {} while (0)
450 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
451 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
455 /* one of these for every pending CIFS request to the server */
457 struct list_head qhead; /* mids waiting on reply from this server */
458 __u16 mid; /* multiplex id */
459 __u16 pid; /* process id */
460 __u32 sequence_number; /* for CIFS signing */
461 unsigned long when_alloc; /* when mid was created */
462 #ifdef CONFIG_CIFS_STATS2
463 unsigned long when_sent; /* time when smb send finished */
464 unsigned long when_received; /* when demux complete (taken off wire) */
466 struct task_struct *tsk; /* task waiting for response */
467 struct smb_hdr *resp_buf; /* response buffer */
468 int midState; /* wish this were enum but can not pass to wait_event */
469 __u8 command; /* smb command code */
470 bool largeBuf:1; /* if valid response, is pointer to large buf */
471 bool multiRsp:1; /* multiple trans2 responses for one request */
472 bool multiEnd:1; /* both received */
475 struct oplock_q_entry {
476 struct list_head qhead;
477 struct inode *pinode;
478 struct cifsTconInfo *tcon;
482 /* for pending dnotify requests */
483 struct dir_notify_req {
484 struct list_head lhead;
491 __u32 filter; /* CompletionFilter (for multishot) */
496 struct dfs_info3_param {
497 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
506 * common struct for holding inode info when searching for or updating an
507 * inode with new info
510 #define CIFS_FATTR_DFS_REFERRAL 0x1
511 #define CIFS_FATTR_DELETE_PENDING 0x2
512 #define CIFS_FATTR_NEED_REVAL 0x4
513 #define CIFS_FATTR_INO_COLLISION 0x8
525 unsigned int cf_nlink;
526 unsigned int cf_dtype;
527 struct timespec cf_atime;
528 struct timespec cf_mtime;
529 struct timespec cf_ctime;
532 static inline void free_dfs_info_param(struct dfs_info3_param *param)
535 kfree(param->path_name);
536 kfree(param->node_name);
541 static inline void free_dfs_info_array(struct dfs_info3_param *param,
545 if ((number_of_items == 0) || (param == NULL))
547 for (i = 0; i < number_of_items; i++) {
548 kfree(param[i].path_name);
549 kfree(param[i].node_name);
555 #define MID_REQUEST_ALLOCATED 1
556 #define MID_REQUEST_SUBMITTED 2
557 #define MID_RESPONSE_RECEIVED 4
558 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
559 #define MID_NO_RESP_NEEDED 0x10
561 /* Types of response buffer returned from SendReceive2 */
562 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
563 #define CIFS_SMALL_BUFFER 1
564 #define CIFS_LARGE_BUFFER 2
565 #define CIFS_IOVEC 4 /* array of response buffers */
567 /* Type of Request to SendReceive2 */
568 #define CIFS_STD_OP 0 /* normal request timeout */
569 #define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
570 #define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
571 #define CIFS_BLOCKING_OP 4 /* operation can block */
572 #define CIFS_ASYNC_OP 8 /* do not wait for response */
573 #define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
574 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
575 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
576 #define CIFS_NO_RESP 0x040 /* no response buffer required */
578 /* Security Flags: indicate type of session setup needed */
579 #define CIFSSEC_MAY_SIGN 0x00001
580 #define CIFSSEC_MAY_NTLM 0x00002
581 #define CIFSSEC_MAY_NTLMV2 0x00004
582 #define CIFSSEC_MAY_KRB5 0x00008
583 #ifdef CONFIG_CIFS_WEAK_PW_HASH
584 #define CIFSSEC_MAY_LANMAN 0x00010
585 #define CIFSSEC_MAY_PLNTXT 0x00020
587 #define CIFSSEC_MAY_LANMAN 0
588 #define CIFSSEC_MAY_PLNTXT 0
589 #endif /* weak passwords */
590 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
591 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
593 #define CIFSSEC_MUST_SIGN 0x01001
594 /* note that only one of the following can be set so the
595 result of setting MUST flags more than once will be to
596 require use of the stronger protocol */
597 #define CIFSSEC_MUST_NTLM 0x02002
598 #define CIFSSEC_MUST_NTLMV2 0x04004
599 #define CIFSSEC_MUST_KRB5 0x08008
600 #ifdef CONFIG_CIFS_WEAK_PW_HASH
601 #define CIFSSEC_MUST_LANMAN 0x10010
602 #define CIFSSEC_MUST_PLNTXT 0x20020
603 #ifdef CONFIG_CIFS_UPCALL
604 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
606 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
608 #else /* do not allow weak pw hash */
609 #ifdef CONFIG_CIFS_UPCALL
610 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
612 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
614 #endif /* WEAK_PW_HASH */
615 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
616 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
618 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
619 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
620 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
622 *****************************************************************
623 * All constants go here
624 *****************************************************************
627 #define UID_HASH (16)
630 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
631 * following to be declared.
634 /****************************************************************************
635 * Locking notes. All updates to global variables and lists should be
636 * protected by spinlocks or semaphores.
640 * GlobalMid_Lock protects:
641 * list operations on pending_mid_q and oplockQ
642 * updates to XID counters, multiplex id and SMB sequence numbers
643 * GlobalSMBSesLock protects:
644 * list operations on tcp and SMB session lists and tCon lists
645 * f_owner.lock protects certain per file struct operations
646 * mapping->page_lock protects certain per page operations
650 * sesSem operations on smb session
651 * tconSem operations on tree connection
652 * fh_sem file handle reconnection operations
654 ****************************************************************************/
656 #ifdef DECLARE_GLOBALS_HERE
657 #define GLOBAL_EXTERN
659 #define GLOBAL_EXTERN extern
663 * the list of TCP_Server_Info structures, ie each of the sockets
664 * connecting our client to a distinct server (ip address), is
665 * chained together by cifs_tcp_ses_list. The list of all our SMB
666 * sessions (and from that the tree connections) can be found
667 * by iterating over cifs_tcp_ses_list
669 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
672 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
673 * tcp session, and the list of tcon's per smb session. It also protects
674 * the reference counters for the server, smb session, and tcon. Finally,
675 * changes to the tcon->tidStatus should be done while holding this lock.
677 GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
680 * This lock protects the cifs_file->llist and cifs_file->flist
681 * list operations, and updates to some flags (cifs_file->invalidHandle)
682 * It will be moved to either use the tcon->stat_lock or equivalent later.
683 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
684 * the cifs_tcp_ses_lock must be grabbed first and released last.
686 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
688 /* Outstanding dir notify requests */
689 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
690 /* DirNotify response queue */
691 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
694 * Global transaction id (XID) information
696 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
697 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
698 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
699 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
700 /* on midQ entries */
701 GLOBAL_EXTERN char Local_System_Name[15];
704 * Global counters, updated atomically
706 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
707 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
708 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
709 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
710 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
712 /* Various Debug counters */
713 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
714 #ifdef CONFIG_CIFS_STATS2
715 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
716 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
718 GLOBAL_EXTERN atomic_t smBufAllocCount;
719 GLOBAL_EXTERN atomic_t midCount;
722 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
723 to be established on existing mount if we
724 have the uid/password or Kerberos credential
725 or equivalent for current user */
726 GLOBAL_EXTERN unsigned int oplockEnabled;
727 GLOBAL_EXTERN unsigned int experimEnabled;
728 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
729 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
730 with more secure ntlmssp2 challenge/resp */
731 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
732 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
733 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
734 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
735 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
736 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
738 extern const struct slow_work_ops cifs_oplock_break_ops;
740 #endif /* _CIFS_GLOB_H */