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.
20 #include <linux/in6.h>
21 #include <linux/slab.h>
22 #include <linux/slow-work.h>
23 #include "cifs_fs_sb.h"
26 * The sizes of various internal tables and strings
28 #define MAX_UID_INFO 16
29 #define MAX_SES_INFO 2
30 #define MAX_TCON_INFO 4
32 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
33 #define MAX_SERVER_SIZE 15
34 #define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
35 #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
36 termination then *2 for unicode versions */
37 #define MAX_PASSWORD_SIZE 16
39 #define CIFS_MIN_RCV_POOL 4
42 * MAX_REQ is the maximum number of requests that WE will send
43 * on one socket concurrently. It also matches the most common
44 * value of max multiplex returned by servers. We may
45 * eventually want to use the negotiated value (in case
46 * future servers can handle more) when we are more confident that
47 * we will not have problems oveloading the socket with pending
50 #define CIFS_MAX_REQ 50
52 #define RFC1001_NAME_LEN 15
53 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
55 /* currently length of NIP6_FMT */
56 #define SERVER_NAME_LENGTH 40
57 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
59 /* used to define string lengths for reversing unicode strings */
61 /* (max path length + 1 for null) * 2 for unicode */
66 #ifndef XATTR_DOS_ATTRIB
67 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
71 * CIFS vfs client Status information (based on what we know.)
74 /* associated with each tcp and smb session */
83 PLAINTXT = 0, /* Legacy with Plaintext passwords */
84 LANMAN, /* Legacy LANMAN auth */
85 NTLM, /* Legacy NTLM012 auth with NTLM hash */
86 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
87 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
88 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
89 Kerberos, /* Kerberos via SPNEGO */
95 /* Netbios frames protocol not supported at this time */
101 char ntlm[CIFS_SESS_KEY_SIZE + 16];
102 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
105 struct ntlmv2_resp resp;
115 struct cifs_sid osid;
116 struct cifs_sid gsid;
117 struct cifs_ntace *ntaces;
118 struct cifs_ace *aces;
122 *****************************************************************
123 * Except the CIFS PDUs themselves all the
124 * globally interesting structs should go here
125 *****************************************************************
128 struct TCP_Server_Info {
129 struct list_head tcp_ses_list;
130 struct list_head smb_ses_list;
131 int srv_count; /* reference counter */
132 /* 15 character server name + 0x20 16th byte indicating type = srv */
133 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
134 char *hostname; /* hostname portion of UNC string */
135 struct socket *ssocket;
137 struct sockaddr_in sockAddr;
138 struct sockaddr_in6 sockAddr6;
140 wait_queue_head_t response_q;
141 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
142 struct list_head pending_mid_q;
143 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
144 unsigned short server_codepage; /* codepage for the server */
145 unsigned long ip_address; /* IP addr for the server if known */
146 enum protocolEnum protocolType;
149 bool svlocal:1; /* local server or remote */
150 bool noblocksnd; /* use blocking sendmsg */
151 bool noautotune; /* do not autotune send buf sizes */
153 atomic_t inFlight; /* number of requests on the wire to server */
154 #ifdef CONFIG_CIFS_STATS2
155 atomic_t inSend; /* requests trying to send */
156 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
158 enum statusEnum tcpStatus; /* what we think the status is */
159 struct mutex srv_mutex;
160 struct task_struct *tsk;
161 char server_GUID[16];
163 enum securityEnum secType;
164 unsigned int maxReq; /* Clients should submit no more */
165 /* than maxReq distinct unanswered SMBs to the server when using */
166 /* multiplexed reads or writes */
167 unsigned int maxBuf; /* maxBuf specifies the maximum */
168 /* message size the server can send or receive for non-raw SMBs */
169 unsigned int max_rw; /* maxRw specifies the maximum */
170 /* message size the server can send or receive for */
171 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
172 unsigned int max_vcs; /* maximum number of smb sessions, at least
173 those that can be specified uniquely with
175 char sessid[4]; /* unique token id for this session */
176 /* (returned on Negotiate */
177 int capabilities; /* allow selective disabling of caps by smb sess */
178 int timeAdj; /* Adjust for difference in server time zone in sec */
179 __u16 CurrentMid; /* multiplex id - rotating counter */
180 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
181 /* 16th byte of RFC1001 workstation name is always null */
182 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
183 __u32 sequence_number; /* needed for CIFS PDU signature */
184 struct mac_key mac_signing_key;
185 char ntlmv2_hash[16];
186 unsigned long lstrp; /* when we got last response from this server */
187 u16 dialect; /* dialect index that server chose */
188 /* extended security flavors that server supports */
189 bool sec_kerberos; /* supports plain Kerberos */
190 bool sec_mskerberos; /* supports legacy MS Kerberos */
191 bool sec_kerberosu2u; /* supports U2U Kerberos */
192 bool sec_ntlmssp; /* supports NTLMSSP */
196 * The following is our shortcut to user information. We surface the uid,
197 * and name. We always get the password on the fly in case it
198 * has changed. We also hang a list of sessions owned by this user off here.
201 struct list_head userList;
202 struct list_head sessionList; /* SMB sessions for this user */
204 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
205 /* BB may need ptr or callback for PAM or WinBind info */
209 * Session structure. One of these for each uid session with a particular host
212 struct list_head smb_ses_list;
213 struct list_head tcon_list;
214 struct mutex session_mutex;
216 struct cifsUidInfo *uidInfo; /* pointer to user info */
218 struct TCP_Server_Info *server; /* pointer to server info */
219 int ses_count; /* reference counter */
220 enum statusEnum status;
221 unsigned overrideSecFlg; /* if non-zero override global sec flags */
222 __u16 ipc_tid; /* special tid for connection to IPC share */
225 char *serverOS; /* name of operating system underlying server */
226 char *serverNOS; /* name of network operating system of server */
227 char *serverDomain; /* security realm of server */
228 int Suid; /* remote smb uid */
229 uid_t linux_uid; /* local Linux uid */
231 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
232 TCP names - will ipv6 and sctp addresses fit? */
233 char userName[MAX_USERNAME_SIZE + 1];
236 bool need_reconnect:1; /* connection reset, uid now invalid */
238 /* no more than one of the following three session flags may be set */
239 #define CIFS_SES_NT4 1
240 #define CIFS_SES_OS2 2
241 #define CIFS_SES_W9X 4
242 /* following flag is set for old servers such as OS2 (and Win95?)
243 which do not negotiate NTLM or POSIX dialects, but instead
244 negotiate one of the older LANMAN dialects */
245 #define CIFS_SES_LANMAN 8
247 * there is one of these for each connection to a resource on a particular
250 struct cifsTconInfo {
251 struct list_head tcon_list;
253 struct list_head openFileList;
254 struct cifsSesInfo *ses; /* pointer to session associated with */
255 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
256 char *nativeFileSystem;
257 char *password; /* for share-level security */
258 __u16 tid; /* The 2 byte tree id */
259 __u16 Flags; /* optional support bits */
260 enum statusEnum tidStatus;
261 #ifdef CONFIG_CIFS_STATS
262 atomic_t num_smbs_sent;
265 atomic_t num_flushes;
266 atomic_t num_oplock_brks;
269 atomic_t num_deletes;
271 atomic_t num_posixopens;
272 atomic_t num_posixmkdirs;
274 atomic_t num_renames;
275 atomic_t num_t2renames;
279 atomic_t num_hardlinks;
280 atomic_t num_symlinks;
282 atomic_t num_acl_get;
283 atomic_t num_acl_set;
284 #ifdef CONFIG_CIFS_STATS2
285 unsigned long long time_writes;
286 unsigned long long time_reads;
287 unsigned long long time_opens;
288 unsigned long long time_deletes;
289 unsigned long long time_closes;
290 unsigned long long time_mkdirs;
291 unsigned long long time_rmdirs;
292 unsigned long long time_renames;
293 unsigned long long time_t2renames;
294 unsigned long long time_ffirst;
295 unsigned long long time_fnext;
296 unsigned long long time_fclose;
297 #endif /* CONFIG_CIFS_STATS2 */
300 spinlock_t stat_lock;
301 #endif /* CONFIG_CIFS_STATS */
302 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
303 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
304 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
305 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
308 bool seal:1; /* transport encryption for this mounted share */
309 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
310 for this mount even if server would support */
311 bool local_lease:1; /* check leases (only) on local system not remote */
312 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
313 bool need_reconnect:1; /* connection reset, tid now invalid */
314 /* BB add field for back pointer to sb struct(s)? */
318 * This info hangs off the cifsFileInfo structure, pointed to by llist.
319 * This is used to track byte stream locks on the file
321 struct cifsLockInfo {
322 struct list_head llist; /* pointer to next cifsLockInfo */
329 * One of these for each open instance of a file
331 struct cifs_search_info {
332 loff_t index_of_last_entry;
333 __u16 entries_in_buffer;
336 char *ntwrk_buf_start;
337 char *srch_entries_start;
340 unsigned int resume_name_len;
344 bool smallBuf:1; /* so we know which buf_release function to call */
347 struct cifsFileInfo {
348 struct list_head tlist; /* pointer to next fid owned by tcon */
349 struct list_head flist; /* next fid (file instance) for this inode */
350 unsigned int uid; /* allows finding which FileInfo structure */
351 __u32 pid; /* process id who opened file */
352 __u16 netfid; /* file id from remote */
353 /* BB add lock scope info here if needed */ ;
354 /* lock scope id (0 if none) */
355 struct file *pfile; /* needed for writepage */
356 struct inode *pInode; /* needed for oplock break */
357 struct vfsmount *mnt;
358 struct mutex lock_mutex;
359 struct list_head llist; /* list of byte range locks we have. */
360 bool closePend:1; /* file is marked to close */
361 bool invalidHandle:1; /* file closed via session abend */
362 bool oplock_break_cancelled:1;
363 atomic_t count; /* reference count */
364 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
365 struct cifs_search_info srch_inf;
366 struct slow_work oplock_break; /* slow_work job for oplock breaks */
369 /* Take a reference on the file private data */
370 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
372 atomic_inc(&cifs_file->count);
375 /* Release a reference on the file private data */
376 static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
378 if (atomic_dec_and_test(&cifs_file->count)) {
379 iput(cifs_file->pInode);
385 * One of these for each file inode
388 struct cifsInodeInfo {
389 struct list_head lockList;
390 /* BB add in lists for dirty pages i.e. write caching info for oplock */
391 struct list_head openFileList;
393 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
394 unsigned long time; /* jiffies of last update/check of inode */
395 bool clientCanCacheRead:1; /* read oplock */
396 bool clientCanCacheAll:1; /* read and writebehind oplock */
397 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
398 bool invalid_mapping:1; /* pagecache is invalid */
399 u64 server_eof; /* current file size on server */
400 u64 uniqueid; /* server inode number */
401 struct inode vfs_inode;
404 static inline struct cifsInodeInfo *
405 CIFS_I(struct inode *inode)
407 return container_of(inode, struct cifsInodeInfo, vfs_inode);
410 static inline struct cifs_sb_info *
411 CIFS_SB(struct super_block *sb)
413 return sb->s_fs_info;
416 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
424 #ifdef CONFIG_CIFS_STATS
425 #define cifs_stats_inc atomic_inc
427 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
431 spin_lock(&tcon->stat_lock);
432 tcon->bytes_written += bytes;
433 spin_unlock(&tcon->stat_lock);
437 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
440 spin_lock(&tcon->stat_lock);
441 tcon->bytes_read += bytes;
442 spin_unlock(&tcon->stat_lock);
446 #define cifs_stats_inc(field) do {} while (0)
447 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
448 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
452 /* one of these for every pending CIFS request to the server */
454 struct list_head qhead; /* mids waiting on reply from this server */
455 __u16 mid; /* multiplex id */
456 __u16 pid; /* process id */
457 __u32 sequence_number; /* for CIFS signing */
458 unsigned long when_alloc; /* when mid was created */
459 #ifdef CONFIG_CIFS_STATS2
460 unsigned long when_sent; /* time when smb send finished */
461 unsigned long when_received; /* when demux complete (taken off wire) */
463 struct task_struct *tsk; /* task waiting for response */
464 struct smb_hdr *resp_buf; /* response buffer */
465 int midState; /* wish this were enum but can not pass to wait_event */
466 __u8 command; /* smb command code */
467 bool largeBuf:1; /* if valid response, is pointer to large buf */
468 bool multiRsp:1; /* multiple trans2 responses for one request */
469 bool multiEnd:1; /* both received */
472 struct oplock_q_entry {
473 struct list_head qhead;
474 struct inode *pinode;
475 struct cifsTconInfo *tcon;
479 /* for pending dnotify requests */
480 struct dir_notify_req {
481 struct list_head lhead;
488 __u32 filter; /* CompletionFilter (for multishot) */
493 struct dfs_info3_param {
494 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
503 * common struct for holding inode info when searching for or updating an
504 * inode with new info
507 #define CIFS_FATTR_DFS_REFERRAL 0x1
508 #define CIFS_FATTR_DELETE_PENDING 0x2
509 #define CIFS_FATTR_NEED_REVAL 0x4
510 #define CIFS_FATTR_INO_COLLISION 0x8
522 unsigned int cf_nlink;
523 unsigned int cf_dtype;
524 struct timespec cf_atime;
525 struct timespec cf_mtime;
526 struct timespec cf_ctime;
529 static inline void free_dfs_info_param(struct dfs_info3_param *param)
532 kfree(param->path_name);
533 kfree(param->node_name);
538 static inline void free_dfs_info_array(struct dfs_info3_param *param,
542 if ((number_of_items == 0) || (param == NULL))
544 for (i = 0; i < number_of_items; i++) {
545 kfree(param[i].path_name);
546 kfree(param[i].node_name);
552 #define MID_REQUEST_ALLOCATED 1
553 #define MID_REQUEST_SUBMITTED 2
554 #define MID_RESPONSE_RECEIVED 4
555 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
556 #define MID_NO_RESP_NEEDED 0x10
558 /* Types of response buffer returned from SendReceive2 */
559 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
560 #define CIFS_SMALL_BUFFER 1
561 #define CIFS_LARGE_BUFFER 2
562 #define CIFS_IOVEC 4 /* array of response buffers */
564 /* Type of Request to SendReceive2 */
565 #define CIFS_STD_OP 0 /* normal request timeout */
566 #define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
567 #define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
568 #define CIFS_BLOCKING_OP 4 /* operation can block */
569 #define CIFS_ASYNC_OP 8 /* do not wait for response */
570 #define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
571 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
572 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
573 #define CIFS_NO_RESP 0x040 /* no response buffer required */
575 /* Security Flags: indicate type of session setup needed */
576 #define CIFSSEC_MAY_SIGN 0x00001
577 #define CIFSSEC_MAY_NTLM 0x00002
578 #define CIFSSEC_MAY_NTLMV2 0x00004
579 #define CIFSSEC_MAY_KRB5 0x00008
580 #ifdef CONFIG_CIFS_WEAK_PW_HASH
581 #define CIFSSEC_MAY_LANMAN 0x00010
582 #define CIFSSEC_MAY_PLNTXT 0x00020
584 #define CIFSSEC_MAY_LANMAN 0
585 #define CIFSSEC_MAY_PLNTXT 0
586 #endif /* weak passwords */
587 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
588 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
590 #define CIFSSEC_MUST_SIGN 0x01001
591 /* note that only one of the following can be set so the
592 result of setting MUST flags more than once will be to
593 require use of the stronger protocol */
594 #define CIFSSEC_MUST_NTLM 0x02002
595 #define CIFSSEC_MUST_NTLMV2 0x04004
596 #define CIFSSEC_MUST_KRB5 0x08008
597 #ifdef CONFIG_CIFS_WEAK_PW_HASH
598 #define CIFSSEC_MUST_LANMAN 0x10010
599 #define CIFSSEC_MUST_PLNTXT 0x20020
600 #ifdef CONFIG_CIFS_UPCALL
601 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
603 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
605 #else /* do not allow weak pw hash */
606 #ifdef CONFIG_CIFS_UPCALL
607 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
609 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
611 #endif /* WEAK_PW_HASH */
612 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
613 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
615 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
616 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
617 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
619 *****************************************************************
620 * All constants go here
621 *****************************************************************
624 #define UID_HASH (16)
627 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
628 * following to be declared.
631 /****************************************************************************
632 * Locking notes. All updates to global variables and lists should be
633 * protected by spinlocks or semaphores.
637 * GlobalMid_Lock protects:
638 * list operations on pending_mid_q and oplockQ
639 * updates to XID counters, multiplex id and SMB sequence numbers
640 * GlobalSMBSesLock protects:
641 * list operations on tcp and SMB session lists and tCon lists
642 * f_owner.lock protects certain per file struct operations
643 * mapping->page_lock protects certain per page operations
647 * sesSem operations on smb session
648 * tconSem operations on tree connection
649 * fh_sem file handle reconnection operations
651 ****************************************************************************/
653 #ifdef DECLARE_GLOBALS_HERE
654 #define GLOBAL_EXTERN
656 #define GLOBAL_EXTERN extern
660 * the list of TCP_Server_Info structures, ie each of the sockets
661 * connecting our client to a distinct server (ip address), is
662 * chained together by cifs_tcp_ses_list. The list of all our SMB
663 * sessions (and from that the tree connections) can be found
664 * by iterating over cifs_tcp_ses_list
666 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
669 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
670 * tcp session, and the list of tcon's per smb session. It also protects
671 * the reference counters for the server, smb session, and tcon. Finally,
672 * changes to the tcon->tidStatus should be done while holding this lock.
674 GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
677 * This lock protects the cifs_file->llist and cifs_file->flist
678 * list operations, and updates to some flags (cifs_file->invalidHandle)
679 * It will be moved to either use the tcon->stat_lock or equivalent later.
680 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
681 * the cifs_tcp_ses_lock must be grabbed first and released last.
683 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
685 /* Outstanding dir notify requests */
686 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
687 /* DirNotify response queue */
688 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
691 * Global transaction id (XID) information
693 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
694 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
695 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
696 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
697 /* on midQ entries */
698 GLOBAL_EXTERN char Local_System_Name[15];
701 * Global counters, updated atomically
703 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
704 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
705 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
706 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
707 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
709 /* Various Debug counters */
710 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
711 #ifdef CONFIG_CIFS_STATS2
712 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
713 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
715 GLOBAL_EXTERN atomic_t smBufAllocCount;
716 GLOBAL_EXTERN atomic_t midCount;
719 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
720 to be established on existing mount if we
721 have the uid/password or Kerberos credential
722 or equivalent for current user */
723 GLOBAL_EXTERN unsigned int oplockEnabled;
724 GLOBAL_EXTERN unsigned int experimEnabled;
725 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
726 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
727 with more secure ntlmssp2 challenge/resp */
728 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
729 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
730 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
731 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
732 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
733 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
735 extern const struct slow_work_ops cifs_oplock_break_ops;