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 enum protocolEnum protocolType;
151 bool svlocal:1; /* local server or remote */
152 bool noblocksnd; /* use blocking sendmsg */
153 bool noautotune; /* do not autotune send buf sizes */
155 atomic_t inFlight; /* number of requests on the wire to server */
156 #ifdef CONFIG_CIFS_STATS2
157 atomic_t inSend; /* requests trying to send */
158 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
160 enum statusEnum tcpStatus; /* what we think the status is */
161 struct mutex srv_mutex;
162 struct task_struct *tsk;
163 char server_GUID[16];
165 enum securityEnum secType;
166 unsigned int maxReq; /* Clients should submit no more */
167 /* than maxReq distinct unanswered SMBs to the server when using */
168 /* multiplexed reads or writes */
169 unsigned int maxBuf; /* maxBuf specifies the maximum */
170 /* message size the server can send or receive for non-raw SMBs */
171 unsigned int max_rw; /* maxRw specifies the maximum */
172 /* message size the server can send or receive for */
173 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
174 unsigned int max_vcs; /* maximum number of smb sessions, at least
175 those that can be specified uniquely with
177 char sessid[4]; /* unique token id for this session */
178 /* (returned on Negotiate */
179 int capabilities; /* allow selective disabling of caps by smb sess */
180 int timeAdj; /* Adjust for difference in server time zone in sec */
181 __u16 CurrentMid; /* multiplex id - rotating counter */
182 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
183 /* 16th byte of RFC1001 workstation name is always null */
184 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
185 __u32 sequence_number; /* needed for CIFS PDU signature */
186 struct mac_key mac_signing_key;
187 char ntlmv2_hash[16];
188 unsigned long lstrp; /* when we got last response from this server */
189 u16 dialect; /* dialect index that server chose */
190 /* extended security flavors that server supports */
191 bool sec_kerberos; /* supports plain Kerberos */
192 bool sec_mskerberos; /* supports legacy MS Kerberos */
193 bool sec_kerberosu2u; /* supports U2U Kerberos */
194 bool sec_ntlmssp; /* supports NTLMSSP */
198 * The following is our shortcut to user information. We surface the uid,
199 * and name. We always get the password on the fly in case it
200 * has changed. We also hang a list of sessions owned by this user off here.
203 struct list_head userList;
204 struct list_head sessionList; /* SMB sessions for this user */
206 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
207 /* BB may need ptr or callback for PAM or WinBind info */
211 * Session structure. One of these for each uid session with a particular host
214 struct list_head smb_ses_list;
215 struct list_head tcon_list;
216 struct mutex session_mutex;
218 struct cifsUidInfo *uidInfo; /* pointer to user info */
220 struct TCP_Server_Info *server; /* pointer to server info */
221 int ses_count; /* reference counter */
222 enum statusEnum status;
223 unsigned overrideSecFlg; /* if non-zero override global sec flags */
224 __u16 ipc_tid; /* special tid for connection to IPC share */
227 char *serverOS; /* name of operating system underlying server */
228 char *serverNOS; /* name of network operating system of server */
229 char *serverDomain; /* security realm of server */
230 int Suid; /* remote smb uid */
231 uid_t linux_uid; /* local Linux uid */
233 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
234 TCP names - will ipv6 and sctp addresses fit? */
235 char userName[MAX_USERNAME_SIZE + 1];
238 bool need_reconnect:1; /* connection reset, uid now invalid */
240 /* no more than one of the following three session flags may be set */
241 #define CIFS_SES_NT4 1
242 #define CIFS_SES_OS2 2
243 #define CIFS_SES_W9X 4
244 /* following flag is set for old servers such as OS2 (and Win95?)
245 which do not negotiate NTLM or POSIX dialects, but instead
246 negotiate one of the older LANMAN dialects */
247 #define CIFS_SES_LANMAN 8
249 * there is one of these for each connection to a resource on a particular
252 struct cifsTconInfo {
253 struct list_head tcon_list;
255 struct list_head openFileList;
256 struct cifsSesInfo *ses; /* pointer to session associated with */
257 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
258 char *nativeFileSystem;
259 char *password; /* for share-level security */
260 __u16 tid; /* The 2 byte tree id */
261 __u16 Flags; /* optional support bits */
262 enum statusEnum tidStatus;
263 #ifdef CONFIG_CIFS_STATS
264 atomic_t num_smbs_sent;
267 atomic_t num_flushes;
268 atomic_t num_oplock_brks;
271 atomic_t num_deletes;
273 atomic_t num_posixopens;
274 atomic_t num_posixmkdirs;
276 atomic_t num_renames;
277 atomic_t num_t2renames;
281 atomic_t num_hardlinks;
282 atomic_t num_symlinks;
284 atomic_t num_acl_get;
285 atomic_t num_acl_set;
286 #ifdef CONFIG_CIFS_STATS2
287 unsigned long long time_writes;
288 unsigned long long time_reads;
289 unsigned long long time_opens;
290 unsigned long long time_deletes;
291 unsigned long long time_closes;
292 unsigned long long time_mkdirs;
293 unsigned long long time_rmdirs;
294 unsigned long long time_renames;
295 unsigned long long time_t2renames;
296 unsigned long long time_ffirst;
297 unsigned long long time_fnext;
298 unsigned long long time_fclose;
299 #endif /* CONFIG_CIFS_STATS2 */
302 spinlock_t stat_lock;
303 #endif /* CONFIG_CIFS_STATS */
304 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
305 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
306 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
307 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
310 bool seal:1; /* transport encryption for this mounted share */
311 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
312 for this mount even if server would support */
313 bool local_lease:1; /* check leases (only) on local system not remote */
314 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
315 bool need_reconnect:1; /* connection reset, tid now invalid */
316 /* BB add field for back pointer to sb struct(s)? */
320 * This info hangs off the cifsFileInfo structure, pointed to by llist.
321 * This is used to track byte stream locks on the file
323 struct cifsLockInfo {
324 struct list_head llist; /* pointer to next cifsLockInfo */
331 * One of these for each open instance of a file
333 struct cifs_search_info {
334 loff_t index_of_last_entry;
335 __u16 entries_in_buffer;
338 char *ntwrk_buf_start;
339 char *srch_entries_start;
342 unsigned int resume_name_len;
346 bool smallBuf:1; /* so we know which buf_release function to call */
349 struct cifsFileInfo {
350 struct list_head tlist; /* pointer to next fid owned by tcon */
351 struct list_head flist; /* next fid (file instance) for this inode */
352 unsigned int uid; /* allows finding which FileInfo structure */
353 __u32 pid; /* process id who opened file */
354 __u16 netfid; /* file id from remote */
355 /* BB add lock scope info here if needed */ ;
356 /* lock scope id (0 if none) */
357 struct file *pfile; /* needed for writepage */
358 struct inode *pInode; /* needed for oplock break */
359 struct vfsmount *mnt;
360 struct mutex lock_mutex;
361 struct list_head llist; /* list of byte range locks we have. */
362 bool closePend:1; /* file is marked to close */
363 bool invalidHandle:1; /* file closed via session abend */
364 bool oplock_break_cancelled:1;
365 atomic_t count; /* reference count */
366 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
367 struct cifs_search_info srch_inf;
368 struct slow_work oplock_break; /* slow_work job for oplock breaks */
371 /* Take a reference on the file private data */
372 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
374 atomic_inc(&cifs_file->count);
377 /* Release a reference on the file private data */
378 static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
380 if (atomic_dec_and_test(&cifs_file->count)) {
381 iput(cifs_file->pInode);
387 * One of these for each file inode
390 struct cifsInodeInfo {
391 struct list_head lockList;
392 /* BB add in lists for dirty pages i.e. write caching info for oplock */
393 struct list_head openFileList;
395 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
396 unsigned long time; /* jiffies of last update/check of inode */
397 bool clientCanCacheRead:1; /* read oplock */
398 bool clientCanCacheAll:1; /* read and writebehind oplock */
399 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
400 bool invalid_mapping:1; /* pagecache is invalid */
401 u64 server_eof; /* current file size on server */
402 u64 uniqueid; /* server inode number */
403 struct inode vfs_inode;
406 static inline struct cifsInodeInfo *
407 CIFS_I(struct inode *inode)
409 return container_of(inode, struct cifsInodeInfo, vfs_inode);
412 static inline struct cifs_sb_info *
413 CIFS_SB(struct super_block *sb)
415 return sb->s_fs_info;
418 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
426 #ifdef CONFIG_CIFS_STATS
427 #define cifs_stats_inc atomic_inc
429 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
433 spin_lock(&tcon->stat_lock);
434 tcon->bytes_written += bytes;
435 spin_unlock(&tcon->stat_lock);
439 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
442 spin_lock(&tcon->stat_lock);
443 tcon->bytes_read += bytes;
444 spin_unlock(&tcon->stat_lock);
448 #define cifs_stats_inc(field) do {} while (0)
449 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
450 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
454 /* one of these for every pending CIFS request to the server */
456 struct list_head qhead; /* mids waiting on reply from this server */
457 __u16 mid; /* multiplex id */
458 __u16 pid; /* process id */
459 __u32 sequence_number; /* for CIFS signing */
460 unsigned long when_alloc; /* when mid was created */
461 #ifdef CONFIG_CIFS_STATS2
462 unsigned long when_sent; /* time when smb send finished */
463 unsigned long when_received; /* when demux complete (taken off wire) */
465 struct task_struct *tsk; /* task waiting for response */
466 struct smb_hdr *resp_buf; /* response buffer */
467 int midState; /* wish this were enum but can not pass to wait_event */
468 __u8 command; /* smb command code */
469 bool largeBuf:1; /* if valid response, is pointer to large buf */
470 bool multiRsp:1; /* multiple trans2 responses for one request */
471 bool multiEnd:1; /* both received */
474 struct oplock_q_entry {
475 struct list_head qhead;
476 struct inode *pinode;
477 struct cifsTconInfo *tcon;
481 /* for pending dnotify requests */
482 struct dir_notify_req {
483 struct list_head lhead;
490 __u32 filter; /* CompletionFilter (for multishot) */
495 struct dfs_info3_param {
496 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
505 * common struct for holding inode info when searching for or updating an
506 * inode with new info
509 #define CIFS_FATTR_DFS_REFERRAL 0x1
510 #define CIFS_FATTR_DELETE_PENDING 0x2
511 #define CIFS_FATTR_NEED_REVAL 0x4
512 #define CIFS_FATTR_INO_COLLISION 0x8
524 unsigned int cf_nlink;
525 unsigned int cf_dtype;
526 struct timespec cf_atime;
527 struct timespec cf_mtime;
528 struct timespec cf_ctime;
531 static inline void free_dfs_info_param(struct dfs_info3_param *param)
534 kfree(param->path_name);
535 kfree(param->node_name);
540 static inline void free_dfs_info_array(struct dfs_info3_param *param,
544 if ((number_of_items == 0) || (param == NULL))
546 for (i = 0; i < number_of_items; i++) {
547 kfree(param[i].path_name);
548 kfree(param[i].node_name);
554 #define MID_REQUEST_ALLOCATED 1
555 #define MID_REQUEST_SUBMITTED 2
556 #define MID_RESPONSE_RECEIVED 4
557 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
558 #define MID_NO_RESP_NEEDED 0x10
560 /* Types of response buffer returned from SendReceive2 */
561 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
562 #define CIFS_SMALL_BUFFER 1
563 #define CIFS_LARGE_BUFFER 2
564 #define CIFS_IOVEC 4 /* array of response buffers */
566 /* Type of Request to SendReceive2 */
567 #define CIFS_STD_OP 0 /* normal request timeout */
568 #define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
569 #define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
570 #define CIFS_BLOCKING_OP 4 /* operation can block */
571 #define CIFS_ASYNC_OP 8 /* do not wait for response */
572 #define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
573 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
574 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
575 #define CIFS_NO_RESP 0x040 /* no response buffer required */
577 /* Security Flags: indicate type of session setup needed */
578 #define CIFSSEC_MAY_SIGN 0x00001
579 #define CIFSSEC_MAY_NTLM 0x00002
580 #define CIFSSEC_MAY_NTLMV2 0x00004
581 #define CIFSSEC_MAY_KRB5 0x00008
582 #ifdef CONFIG_CIFS_WEAK_PW_HASH
583 #define CIFSSEC_MAY_LANMAN 0x00010
584 #define CIFSSEC_MAY_PLNTXT 0x00020
586 #define CIFSSEC_MAY_LANMAN 0
587 #define CIFSSEC_MAY_PLNTXT 0
588 #endif /* weak passwords */
589 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
590 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
592 #define CIFSSEC_MUST_SIGN 0x01001
593 /* note that only one of the following can be set so the
594 result of setting MUST flags more than once will be to
595 require use of the stronger protocol */
596 #define CIFSSEC_MUST_NTLM 0x02002
597 #define CIFSSEC_MUST_NTLMV2 0x04004
598 #define CIFSSEC_MUST_KRB5 0x08008
599 #ifdef CONFIG_CIFS_WEAK_PW_HASH
600 #define CIFSSEC_MUST_LANMAN 0x10010
601 #define CIFSSEC_MUST_PLNTXT 0x20020
602 #ifdef CONFIG_CIFS_UPCALL
603 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
605 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
607 #else /* do not allow weak pw hash */
608 #ifdef CONFIG_CIFS_UPCALL
609 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
611 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
613 #endif /* WEAK_PW_HASH */
614 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
615 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
617 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
618 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
619 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
621 *****************************************************************
622 * All constants go here
623 *****************************************************************
626 #define UID_HASH (16)
629 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
630 * following to be declared.
633 /****************************************************************************
634 * Locking notes. All updates to global variables and lists should be
635 * protected by spinlocks or semaphores.
639 * GlobalMid_Lock protects:
640 * list operations on pending_mid_q and oplockQ
641 * updates to XID counters, multiplex id and SMB sequence numbers
642 * GlobalSMBSesLock protects:
643 * list operations on tcp and SMB session lists and tCon lists
644 * f_owner.lock protects certain per file struct operations
645 * mapping->page_lock protects certain per page operations
649 * sesSem operations on smb session
650 * tconSem operations on tree connection
651 * fh_sem file handle reconnection operations
653 ****************************************************************************/
655 #ifdef DECLARE_GLOBALS_HERE
656 #define GLOBAL_EXTERN
658 #define GLOBAL_EXTERN extern
662 * the list of TCP_Server_Info structures, ie each of the sockets
663 * connecting our client to a distinct server (ip address), is
664 * chained together by cifs_tcp_ses_list. The list of all our SMB
665 * sessions (and from that the tree connections) can be found
666 * by iterating over cifs_tcp_ses_list
668 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
671 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
672 * tcp session, and the list of tcon's per smb session. It also protects
673 * the reference counters for the server, smb session, and tcon. Finally,
674 * changes to the tcon->tidStatus should be done while holding this lock.
676 GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
679 * This lock protects the cifs_file->llist and cifs_file->flist
680 * list operations, and updates to some flags (cifs_file->invalidHandle)
681 * It will be moved to either use the tcon->stat_lock or equivalent later.
682 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
683 * the cifs_tcp_ses_lock must be grabbed first and released last.
685 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
687 /* Outstanding dir notify requests */
688 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
689 /* DirNotify response queue */
690 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
693 * Global transaction id (XID) information
695 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
696 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
697 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
698 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
699 /* on midQ entries */
700 GLOBAL_EXTERN char Local_System_Name[15];
703 * Global counters, updated atomically
705 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
706 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
707 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
708 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
709 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
711 /* Various Debug counters */
712 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
713 #ifdef CONFIG_CIFS_STATS2
714 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
715 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
717 GLOBAL_EXTERN atomic_t smBufAllocCount;
718 GLOBAL_EXTERN atomic_t midCount;
721 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
722 to be established on existing mount if we
723 have the uid/password or Kerberos credential
724 or equivalent for current user */
725 GLOBAL_EXTERN unsigned int oplockEnabled;
726 GLOBAL_EXTERN unsigned int experimEnabled;
727 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
728 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
729 with more secure ntlmssp2 challenge/resp */
730 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
731 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
732 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
733 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
734 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
735 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
737 extern const struct slow_work_ops cifs_oplock_break_ops;
739 #endif /* _CIFS_GLOB_H */