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 LANMAN = 0, /* Legacy LANMAN auth */
87 NTLM, /* Legacy NTLM012 auth with NTLM hash */
88 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
89 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
90 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
91 Kerberos, /* Kerberos via SPNEGO */
97 /* Netbios frames protocol not supported at this time */
103 char ntlm[CIFS_SESS_KEY_SIZE + 16];
104 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
107 struct ntlmv2_resp resp;
117 struct cifs_sid osid;
118 struct cifs_sid gsid;
119 struct cifs_ntace *ntaces;
120 struct cifs_ace *aces;
124 *****************************************************************
125 * Except the CIFS PDUs themselves all the
126 * globally interesting structs should go here
127 *****************************************************************
130 struct TCP_Server_Info {
131 struct list_head tcp_ses_list;
132 struct list_head smb_ses_list;
133 int srv_count; /* reference counter */
134 /* 15 character server name + 0x20 16th byte indicating type = srv */
135 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
136 char *hostname; /* hostname portion of UNC string */
137 struct socket *ssocket;
139 struct sockaddr_in sockAddr;
140 struct sockaddr_in6 sockAddr6;
142 wait_queue_head_t response_q;
143 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
144 struct list_head pending_mid_q;
145 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
146 unsigned short server_codepage; /* codepage for the server */
147 enum protocolEnum protocolType;
150 bool svlocal:1; /* local server or remote */
151 bool noblocksnd; /* use blocking sendmsg */
152 bool noautotune; /* do not autotune send buf sizes */
154 atomic_t inFlight; /* number of requests on the wire to server */
155 #ifdef CONFIG_CIFS_STATS2
156 atomic_t inSend; /* requests trying to send */
157 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
159 enum statusEnum tcpStatus; /* what we think the status is */
160 struct mutex srv_mutex;
161 struct task_struct *tsk;
162 char server_GUID[16];
164 enum securityEnum secType;
165 unsigned int maxReq; /* Clients should submit no more */
166 /* than maxReq distinct unanswered SMBs to the server when using */
167 /* multiplexed reads or writes */
168 unsigned int maxBuf; /* maxBuf specifies the maximum */
169 /* message size the server can send or receive for non-raw SMBs */
170 unsigned int max_rw; /* maxRw specifies the maximum */
171 /* message size the server can send or receive for */
172 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
173 unsigned int max_vcs; /* maximum number of smb sessions, at least
174 those that can be specified uniquely with
176 char sessid[4]; /* unique token id for this session */
177 /* (returned on Negotiate */
178 int capabilities; /* allow selective disabling of caps by smb sess */
179 int timeAdj; /* Adjust for difference in server time zone in sec */
180 __u16 CurrentMid; /* multiplex id - rotating counter */
181 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
182 /* 16th byte of RFC1001 workstation name is always null */
183 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
184 __u32 sequence_number; /* needed for CIFS PDU signature */
185 struct mac_key mac_signing_key;
186 char ntlmv2_hash[16];
187 unsigned long lstrp; /* when we got last response from this server */
188 u16 dialect; /* dialect index that server chose */
189 /* extended security flavors that server supports */
190 bool sec_kerberos; /* supports plain Kerberos */
191 bool sec_mskerberos; /* supports legacy MS Kerberos */
192 bool sec_kerberosu2u; /* supports U2U Kerberos */
193 bool sec_ntlmssp; /* supports NTLMSSP */
194 #ifdef CONFIG_CIFS_FSCACHE
195 struct fscache_cookie *fscache; /* client index cache cookie */
200 * The following is our shortcut to user information. We surface the uid,
201 * and name. We always get the password on the fly in case it
202 * has changed. We also hang a list of sessions owned by this user off here.
205 struct list_head userList;
206 struct list_head sessionList; /* SMB sessions for this user */
208 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
209 /* BB may need ptr or callback for PAM or WinBind info */
213 * Session structure. One of these for each uid session with a particular host
216 struct list_head smb_ses_list;
217 struct list_head tcon_list;
218 struct mutex session_mutex;
220 struct cifsUidInfo *uidInfo; /* pointer to user info */
222 struct TCP_Server_Info *server; /* pointer to server info */
223 int ses_count; /* reference counter */
224 enum statusEnum status;
225 unsigned overrideSecFlg; /* if non-zero override global sec flags */
226 __u16 ipc_tid; /* special tid for connection to IPC share */
229 char *serverOS; /* name of operating system underlying server */
230 char *serverNOS; /* name of network operating system of server */
231 char *serverDomain; /* security realm of server */
232 int Suid; /* remote smb uid */
233 uid_t linux_uid; /* local Linux uid */
235 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
236 TCP names - will ipv6 and sctp addresses fit? */
237 char userName[MAX_USERNAME_SIZE + 1];
240 bool need_reconnect:1; /* connection reset, uid now invalid */
242 /* no more than one of the following three session flags may be set */
243 #define CIFS_SES_NT4 1
244 #define CIFS_SES_OS2 2
245 #define CIFS_SES_W9X 4
246 /* following flag is set for old servers such as OS2 (and Win95?)
247 which do not negotiate NTLM or POSIX dialects, but instead
248 negotiate one of the older LANMAN dialects */
249 #define CIFS_SES_LANMAN 8
251 * there is one of these for each connection to a resource on a particular
254 struct cifsTconInfo {
255 struct list_head tcon_list;
257 struct list_head openFileList;
258 struct cifsSesInfo *ses; /* pointer to session associated with */
259 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
260 char *nativeFileSystem;
261 char *password; /* for share-level security */
262 __u16 tid; /* The 2 byte tree id */
263 __u16 Flags; /* optional support bits */
264 enum statusEnum tidStatus;
265 #ifdef CONFIG_CIFS_STATS
266 atomic_t num_smbs_sent;
269 atomic_t num_flushes;
270 atomic_t num_oplock_brks;
273 atomic_t num_deletes;
275 atomic_t num_posixopens;
276 atomic_t num_posixmkdirs;
278 atomic_t num_renames;
279 atomic_t num_t2renames;
283 atomic_t num_hardlinks;
284 atomic_t num_symlinks;
286 atomic_t num_acl_get;
287 atomic_t num_acl_set;
288 #ifdef CONFIG_CIFS_STATS2
289 unsigned long long time_writes;
290 unsigned long long time_reads;
291 unsigned long long time_opens;
292 unsigned long long time_deletes;
293 unsigned long long time_closes;
294 unsigned long long time_mkdirs;
295 unsigned long long time_rmdirs;
296 unsigned long long time_renames;
297 unsigned long long time_t2renames;
298 unsigned long long time_ffirst;
299 unsigned long long time_fnext;
300 unsigned long long time_fclose;
301 #endif /* CONFIG_CIFS_STATS2 */
304 spinlock_t stat_lock;
305 #endif /* CONFIG_CIFS_STATS */
306 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
307 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
308 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
309 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
312 bool seal:1; /* transport encryption for this mounted share */
313 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
314 for this mount even if server would support */
315 bool local_lease:1; /* check leases (only) on local system not remote */
316 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
317 bool need_reconnect:1; /* connection reset, tid now invalid */
318 /* BB add field for back pointer to sb struct(s)? */
322 * This info hangs off the cifsFileInfo structure, pointed to by llist.
323 * This is used to track byte stream locks on the file
325 struct cifsLockInfo {
326 struct list_head llist; /* pointer to next cifsLockInfo */
333 * One of these for each open instance of a file
335 struct cifs_search_info {
336 loff_t index_of_last_entry;
337 __u16 entries_in_buffer;
340 char *ntwrk_buf_start;
341 char *srch_entries_start;
344 unsigned int resume_name_len;
348 bool smallBuf:1; /* so we know which buf_release function to call */
351 struct cifsFileInfo {
352 struct list_head tlist; /* pointer to next fid owned by tcon */
353 struct list_head flist; /* next fid (file instance) for this inode */
354 unsigned int uid; /* allows finding which FileInfo structure */
355 __u32 pid; /* process id who opened file */
356 __u16 netfid; /* file id from remote */
357 /* BB add lock scope info here if needed */ ;
358 /* lock scope id (0 if none) */
359 struct file *pfile; /* needed for writepage */
360 struct inode *pInode; /* needed for oplock break */
361 struct vfsmount *mnt;
362 struct mutex lock_mutex;
363 struct list_head llist; /* list of byte range locks we have. */
364 bool closePend:1; /* file is marked to close */
365 bool invalidHandle:1; /* file closed via session abend */
366 bool oplock_break_cancelled:1;
367 atomic_t count; /* reference count */
368 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
369 struct cifs_search_info srch_inf;
370 struct slow_work oplock_break; /* slow_work job for oplock breaks */
373 /* Take a reference on the file private data */
374 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
376 atomic_inc(&cifs_file->count);
379 /* Release a reference on the file private data */
380 static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
382 if (atomic_dec_and_test(&cifs_file->count)) {
383 iput(cifs_file->pInode);
389 * One of these for each file inode
392 struct cifsInodeInfo {
393 struct list_head lockList;
394 /* BB add in lists for dirty pages i.e. write caching info for oplock */
395 struct list_head openFileList;
397 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
398 unsigned long time; /* jiffies of last update/check of inode */
399 bool clientCanCacheRead:1; /* read oplock */
400 bool clientCanCacheAll:1; /* read and writebehind oplock */
401 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
402 bool invalid_mapping:1; /* pagecache is invalid */
403 u64 server_eof; /* current file size on server */
404 u64 uniqueid; /* server inode number */
405 struct inode vfs_inode;
408 static inline struct cifsInodeInfo *
409 CIFS_I(struct inode *inode)
411 return container_of(inode, struct cifsInodeInfo, vfs_inode);
414 static inline struct cifs_sb_info *
415 CIFS_SB(struct super_block *sb)
417 return sb->s_fs_info;
420 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
428 #ifdef CONFIG_CIFS_STATS
429 #define cifs_stats_inc atomic_inc
431 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
435 spin_lock(&tcon->stat_lock);
436 tcon->bytes_written += bytes;
437 spin_unlock(&tcon->stat_lock);
441 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
444 spin_lock(&tcon->stat_lock);
445 tcon->bytes_read += bytes;
446 spin_unlock(&tcon->stat_lock);
450 #define cifs_stats_inc(field) do {} while (0)
451 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
452 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
456 /* one of these for every pending CIFS request to the server */
458 struct list_head qhead; /* mids waiting on reply from this server */
459 __u16 mid; /* multiplex id */
460 __u16 pid; /* process id */
461 __u32 sequence_number; /* for CIFS signing */
462 unsigned long when_alloc; /* when mid was created */
463 #ifdef CONFIG_CIFS_STATS2
464 unsigned long when_sent; /* time when smb send finished */
465 unsigned long when_received; /* when demux complete (taken off wire) */
467 struct task_struct *tsk; /* task waiting for response */
468 struct smb_hdr *resp_buf; /* response buffer */
469 int midState; /* wish this were enum but can not pass to wait_event */
470 __u8 command; /* smb command code */
471 bool largeBuf:1; /* if valid response, is pointer to large buf */
472 bool multiRsp:1; /* multiple trans2 responses for one request */
473 bool multiEnd:1; /* both received */
476 struct oplock_q_entry {
477 struct list_head qhead;
478 struct inode *pinode;
479 struct cifsTconInfo *tcon;
483 /* for pending dnotify requests */
484 struct dir_notify_req {
485 struct list_head lhead;
492 __u32 filter; /* CompletionFilter (for multishot) */
497 struct dfs_info3_param {
498 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
507 * common struct for holding inode info when searching for or updating an
508 * inode with new info
511 #define CIFS_FATTR_DFS_REFERRAL 0x1
512 #define CIFS_FATTR_DELETE_PENDING 0x2
513 #define CIFS_FATTR_NEED_REVAL 0x4
514 #define CIFS_FATTR_INO_COLLISION 0x8
526 unsigned int cf_nlink;
527 unsigned int cf_dtype;
528 struct timespec cf_atime;
529 struct timespec cf_mtime;
530 struct timespec cf_ctime;
533 static inline void free_dfs_info_param(struct dfs_info3_param *param)
536 kfree(param->path_name);
537 kfree(param->node_name);
542 static inline void free_dfs_info_array(struct dfs_info3_param *param,
546 if ((number_of_items == 0) || (param == NULL))
548 for (i = 0; i < number_of_items; i++) {
549 kfree(param[i].path_name);
550 kfree(param[i].node_name);
556 #define MID_REQUEST_ALLOCATED 1
557 #define MID_REQUEST_SUBMITTED 2
558 #define MID_RESPONSE_RECEIVED 4
559 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
560 #define MID_NO_RESP_NEEDED 0x10
562 /* Types of response buffer returned from SendReceive2 */
563 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
564 #define CIFS_SMALL_BUFFER 1
565 #define CIFS_LARGE_BUFFER 2
566 #define CIFS_IOVEC 4 /* array of response buffers */
568 /* Type of Request to SendReceive2 */
569 #define CIFS_STD_OP 0 /* normal request timeout */
570 #define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
571 #define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
572 #define CIFS_BLOCKING_OP 4 /* operation can block */
573 #define CIFS_ASYNC_OP 8 /* do not wait for response */
574 #define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
575 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
576 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
577 #define CIFS_NO_RESP 0x040 /* no response buffer required */
579 /* Security Flags: indicate type of session setup needed */
580 #define CIFSSEC_MAY_SIGN 0x00001
581 #define CIFSSEC_MAY_NTLM 0x00002
582 #define CIFSSEC_MAY_NTLMV2 0x00004
583 #define CIFSSEC_MAY_KRB5 0x00008
584 #ifdef CONFIG_CIFS_WEAK_PW_HASH
585 #define CIFSSEC_MAY_LANMAN 0x00010
586 #define CIFSSEC_MAY_PLNTXT 0x00020
588 #define CIFSSEC_MAY_LANMAN 0
589 #define CIFSSEC_MAY_PLNTXT 0
590 #endif /* weak passwords */
591 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
592 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
594 #define CIFSSEC_MUST_SIGN 0x01001
595 /* note that only one of the following can be set so the
596 result of setting MUST flags more than once will be to
597 require use of the stronger protocol */
598 #define CIFSSEC_MUST_NTLM 0x02002
599 #define CIFSSEC_MUST_NTLMV2 0x04004
600 #define CIFSSEC_MUST_KRB5 0x08008
601 #ifdef CONFIG_CIFS_WEAK_PW_HASH
602 #define CIFSSEC_MUST_LANMAN 0x10010
603 #define CIFSSEC_MUST_PLNTXT 0x20020
604 #ifdef CONFIG_CIFS_UPCALL
605 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
607 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
609 #else /* do not allow weak pw hash */
610 #ifdef CONFIG_CIFS_UPCALL
611 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
613 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
615 #endif /* WEAK_PW_HASH */
616 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
617 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
619 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
620 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
621 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
623 *****************************************************************
624 * All constants go here
625 *****************************************************************
628 #define UID_HASH (16)
631 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
632 * following to be declared.
635 /****************************************************************************
636 * Locking notes. All updates to global variables and lists should be
637 * protected by spinlocks or semaphores.
641 * GlobalMid_Lock protects:
642 * list operations on pending_mid_q and oplockQ
643 * updates to XID counters, multiplex id and SMB sequence numbers
644 * GlobalSMBSesLock protects:
645 * list operations on tcp and SMB session lists and tCon lists
646 * f_owner.lock protects certain per file struct operations
647 * mapping->page_lock protects certain per page operations
651 * sesSem operations on smb session
652 * tconSem operations on tree connection
653 * fh_sem file handle reconnection operations
655 ****************************************************************************/
657 #ifdef DECLARE_GLOBALS_HERE
658 #define GLOBAL_EXTERN
660 #define GLOBAL_EXTERN extern
664 * the list of TCP_Server_Info structures, ie each of the sockets
665 * connecting our client to a distinct server (ip address), is
666 * chained together by cifs_tcp_ses_list. The list of all our SMB
667 * sessions (and from that the tree connections) can be found
668 * by iterating over cifs_tcp_ses_list
670 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
673 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
674 * tcp session, and the list of tcon's per smb session. It also protects
675 * the reference counters for the server, smb session, and tcon. Finally,
676 * changes to the tcon->tidStatus should be done while holding this lock.
678 GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
681 * This lock protects the cifs_file->llist and cifs_file->flist
682 * list operations, and updates to some flags (cifs_file->invalidHandle)
683 * It will be moved to either use the tcon->stat_lock or equivalent later.
684 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
685 * the cifs_tcp_ses_lock must be grabbed first and released last.
687 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
689 /* Outstanding dir notify requests */
690 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
691 /* DirNotify response queue */
692 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
695 * Global transaction id (XID) information
697 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
698 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
699 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
700 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
701 /* on midQ entries */
702 GLOBAL_EXTERN char Local_System_Name[15];
705 * Global counters, updated atomically
707 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
708 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
709 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
710 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
711 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
713 /* Various Debug counters */
714 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
715 #ifdef CONFIG_CIFS_STATS2
716 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
717 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
719 GLOBAL_EXTERN atomic_t smBufAllocCount;
720 GLOBAL_EXTERN atomic_t midCount;
723 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
724 to be established on existing mount if we
725 have the uid/password or Kerberos credential
726 or equivalent for current user */
727 GLOBAL_EXTERN unsigned int oplockEnabled;
728 GLOBAL_EXTERN unsigned int experimEnabled;
729 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
730 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
731 with more secure ntlmssp2 challenge/resp */
732 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
733 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
734 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
735 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
736 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
737 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
739 extern const struct slow_work_ops cifs_oplock_break_ops;
741 #endif /* _CIFS_GLOB_H */