cifsglob.h 19.2 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
/*
 *   fs/cifs/cifsglob.h
 *
4
 *   Copyright (C) International Business Machines  Corp., 2002,2006
L
Linus Torvalds 已提交
5
 *   Author(s): Steve French (sfrench@us.ibm.com)
J
[CIFS]  
Jeremy Allison 已提交
6
 *              Jeremy Allison (jra@samba.org)
L
Linus Torvalds 已提交
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 * 
 */
#include <linux/in.h>
#include <linux/in6.h>
#include "cifs_fs_sb.h"
/*
 * The sizes of various internal tables and strings
 */
#define MAX_UID_INFO 16
#define MAX_SES_INFO 2
#define MAX_TCON_INFO 4

#define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1
#define MAX_SERVER_SIZE 15
#define MAX_SHARE_SIZE  64	/* used to be 20 - this should still be enough */
#define MAX_USERNAME_SIZE 32	/* 32 is to allow for 15 char names + null
				   termination then *2 for unicode versions */
#define MAX_PASSWORD_SIZE 16

#define CIFS_MIN_RCV_POOL 4

/*
 * MAX_REQ is the maximum number of requests that WE will send
 * on one socket concurently. It also matches the most common
 * value of max multiplex returned by servers.  We may 
 * eventually want to use the negotiated value (in case
 * future servers can handle more) when we are more confident that
 * we will not have problems oveloading the socket with pending
 * write data.
 */
#define CIFS_MAX_REQ 50 

#define SERVER_NAME_LENGTH 15
#define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)

/* used to define string lengths for reversing unicode strings */
/*         (256+1)*2 = 514                                     */
/*           (max path length + 1 for null) * 2 for unicode    */
#define MAX_NAME 514

#include "cifspdu.h"

#ifndef FALSE
#define FALSE 0
#endif

#ifndef TRUE
#define TRUE 1
#endif

#ifndef XATTR_DOS_ATTRIB
#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
#endif

/*
 * This information is kept on every Server we know about.
 *
 * Some things to note:
 *
 */
#define SERVER_NAME_LEN_WITH_NULL	(SERVER_NAME_LENGTH + 1)

/*
 * CIFS vfs client Status information (based on what we know.)
 */

 /* associated with each tcp and smb session */
enum statusEnum {
	CifsNew = 0,
	CifsGood,
	CifsExiting,
	CifsNeedReconnect
};

enum securityEnum {
92 93
	LANMAN = 0,             /* Legacy LANMAN auth */
	NTLM,			/* Legacy NTLM012 auth with NTLM hash */
L
Linus Torvalds 已提交
94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114
	NTLMv2,			/* Legacy NTLM auth with NTLMv2 hash */
	RawNTLMSSP,		/* NTLMSSP without SPNEGO */
	NTLMSSP,		/* NTLMSSP via SPNEGO */
	Kerberos		/* Kerberos via SPNEGO */
};

enum protocolEnum {
	IPV4 = 0,
	IPV6,
	SCTP
	/* Netbios frames protocol not supported at this time */
};

/*
 *****************************************************************
 * Except the CIFS PDUs themselves all the
 * globally interesting structs should go here
 *****************************************************************
 */

struct TCP_Server_Info {
115 116
	/* 15 character server name + 0x20 16th byte indicating type = srv */
	char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
117
	char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
L
Linus Torvalds 已提交
118 119 120 121 122 123 124 125 126 127
	struct socket *ssocket;
	union {
		struct sockaddr_in sockAddr;
		struct sockaddr_in6 sockAddr6;
	} addr;
	wait_queue_head_t response_q; 
	wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
	struct list_head pending_mid_q;
	void *Server_NlsInfo;	/* BB - placeholder for future NLS info  */
	unsigned short server_codepage;	/* codepage for the server    */
128
	unsigned long ip_address;	/* IP addr for the server if known */
L
Linus Torvalds 已提交
129 130 131 132 133 134
	enum protocolEnum protocolType;	
	char versionMajor;
	char versionMinor;
	unsigned svlocal:1;	/* local server or remote */
	atomic_t socketUseCount; /* number of open cifs sessions on socket */
	atomic_t inFlight;  /* number of requests on the wire to server */
135 136 137 138
#ifdef CONFIG_CIFS_STATS2
	atomic_t inSend; /* requests trying to send */
	atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
#endif
L
Linus Torvalds 已提交
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
	enum statusEnum tcpStatus; /* what we think the status is */
	struct semaphore tcpSem;
	struct task_struct *tsk;
	char server_GUID[16];
	char secMode;
	enum securityEnum secType;
	unsigned int maxReq;	/* Clients should submit no more */
	/* than maxReq distinct unanswered SMBs to the server when using  */
	/* multiplexed reads or writes */
	unsigned int maxBuf;	/* maxBuf specifies the maximum */
	/* message size the server can send or receive for non-raw SMBs */
	unsigned int maxRw;	/* maxRw specifies the maximum */
	/* message size the server can send or receive for */
	/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
	char sessid[4];		/* unique token id for this session */
	/* (returned on Negotiate */
	int capabilities; /* allow selective disabling of caps by smb sess */
156
	int timeAdj;  /* Adjust for difference in server time zone in sec */
157
	__u16 CurrentMid;         /* multiplex id - rotating counter */
L
Linus Torvalds 已提交
158
	char cryptKey[CIFS_CRYPTO_KEY_SIZE];
159 160
	/* 16th byte of RFC1001 workstation name is always null */
	char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
161
	__u32 sequence_number; /* needed for CIFS PDU signature */
162 163
	char mac_signing_key[CIFS_SESS_KEY_SIZE + 16];
	unsigned long lstrp; /* when we got last response from this server */
L
Linus Torvalds 已提交
164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
};

/*
 * The following is our shortcut to user information.  We surface the uid,
 * and name. We always get the password on the fly in case it
 * has changed. We also hang a list of sessions owned by this user off here. 
 */
struct cifsUidInfo {
	struct list_head userList;
	struct list_head sessionList; /* SMB sessions for this user */
	uid_t linux_uid;
	char user[MAX_USERNAME_SIZE + 1];	/* ascii name of user */
	/* BB may need ptr or callback for PAM or WinBind info */
};

/*
 * Session structure.  One of these for each uid session with a particular host
 */
struct cifsSesInfo {
	struct list_head cifsSessionList;
	struct semaphore sesSem;
185
#if 0
L
Linus Torvalds 已提交
186
	struct cifsUidInfo *uidInfo;	/* pointer to user info */
187
#endif
L
Linus Torvalds 已提交
188 189 190
	struct TCP_Server_Info *server;	/* pointer to server info */
	atomic_t inUse; /* # of mounts (tree connections) on this ses */
	enum statusEnum status;
191
	unsigned overrideSecFlg;  /* if non-zero override global sec flags */
L
Linus Torvalds 已提交
192 193
	__u16 ipc_tid;		/* special tid for connection to IPC share */
	__u16 flags;
194 195
	char *serverOS;		/* name of operating system underlying server */
	char *serverNOS;	/* name of network operating system of server */
L
Linus Torvalds 已提交
196 197 198 199
	char *serverDomain;	/* security realm of server */
	int Suid;		/* remote smb uid  */
	uid_t linux_uid;        /* local Linux uid */
	int capabilities;
200 201
	char serverName[SERVER_NAME_LEN_WITH_NULL * 2];	/* BB make bigger for 
				TCP names - will ipv6 and sctp addresses fit? */
L
Linus Torvalds 已提交
202
	char userName[MAX_USERNAME_SIZE + 1];
203
	char * domainName;
L
Linus Torvalds 已提交
204 205
	char * password;
};
206
/* no more than one of the following three session flags may be set */
L
Linus Torvalds 已提交
207
#define CIFS_SES_NT4 1
208 209 210 211 212 213
#define CIFS_SES_OS2 2
#define CIFS_SES_W9X 4
/* following flag is set for old servers such as OS2 (and Win95?)
   which do not negotiate NTLM or POSIX dialects, but instead
   negotiate one of the older LANMAN dialects */
#define CIFS_SES_LANMAN 8
L
Linus Torvalds 已提交
214 215 216 217 218 219 220 221 222
/*
 * there is one of these for each connection to a resource on a particular
 * session 
 */
struct cifsTconInfo {
	struct list_head cifsConnectionList;
	struct list_head openFileList;
	struct semaphore tconSem;
	struct cifsSesInfo *ses;	/* pointer to session associated with */
223
	char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
L
Linus Torvalds 已提交
224 225 226 227
	char *nativeFileSystem;
	__u16 tid;		/* The 2 byte tree id */
	__u16 Flags;		/* optional support bits */
	enum statusEnum tidStatus;
228
	atomic_t useCount;	/* how many explicit/implicit mounts to share */
L
Linus Torvalds 已提交
229 230 231 232 233 234
#ifdef CONFIG_CIFS_STATS
	atomic_t num_smbs_sent;
	atomic_t num_writes;
	atomic_t num_reads;
	atomic_t num_oplock_brks;
	atomic_t num_opens;
235
	atomic_t num_closes;
L
Linus Torvalds 已提交
236 237 238 239 240
	atomic_t num_deletes;
	atomic_t num_mkdirs;
	atomic_t num_rmdirs;
	atomic_t num_renames;
	atomic_t num_t2renames;
241 242 243
	atomic_t num_ffirst;
	atomic_t num_fnext;
	atomic_t num_fclose;
244 245 246
	atomic_t num_hardlinks;
	atomic_t num_symlinks;
	atomic_t num_locks;
247 248
	atomic_t num_acl_get;
	atomic_t num_acl_set;
249 250 251 252 253 254 255 256 257 258 259 260 261 262
#ifdef CONFIG_CIFS_STATS2
	unsigned long long time_writes;
	unsigned long long time_reads;
	unsigned long long time_opens;
	unsigned long long time_deletes;
	unsigned long long time_closes;
	unsigned long long time_mkdirs;
	unsigned long long time_rmdirs;
	unsigned long long time_renames;
	unsigned long long time_t2renames;
	unsigned long long time_ffirst;
	unsigned long long time_fnext;
	unsigned long long time_fclose;
#endif /* CONFIG_CIFS_STATS2 */
L
Linus Torvalds 已提交
263 264 265
	__u64    bytes_read;
	__u64    bytes_written;
	spinlock_t stat_lock;
266
#endif /* CONFIG_CIFS_STATS */
L
Linus Torvalds 已提交
267
	FILE_SYSTEM_DEVICE_INFO fsDevInfo;
268
	FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
L
Linus Torvalds 已提交
269 270
	FILE_SYSTEM_UNIX_INFO fsUnixInfo;
	unsigned retry:1;
271
	unsigned nocase:1;
L
Linus Torvalds 已提交
272 273 274 275
	/* BB add field for back pointer to sb struct? */
};

/*
J
[CIFS]  
Jeremy Allison 已提交
276 277
 * This info hangs off the cifsFileInfo structure, pointed to by llist.
 * This is used to track byte stream locks on the file
L
Linus Torvalds 已提交
278 279
 */
struct cifsLockInfo {
J
[CIFS]  
Jeremy Allison 已提交
280 281 282 283
	struct list_head llist;	/* pointer to next cifsLockInfo */
	__u64 offset;
	__u64 length;
	__u8 type;
L
Linus Torvalds 已提交
284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300
};

/*
 * One of these for each open instance of a file
 */
struct cifs_search_info {
	loff_t index_of_last_entry;
	__u16 entries_in_buffer;
	__u16 info_level;
	__u32 resume_key;
	char * ntwrk_buf_start;
	char * srch_entries_start;
	char * presume_name;
	unsigned int resume_name_len;
	unsigned endOfSearch:1;
	unsigned emptyDir:1;
	unsigned unicode:1;
301
	unsigned smallBuf:1; /* so we know which buf_release function to call */
L
Linus Torvalds 已提交
302 303 304 305 306 307 308 309 310 311 312 313
};

struct cifsFileInfo {
	struct list_head tlist;	/* pointer to next fid owned by tcon */
	struct list_head flist;	/* next fid (file instance) for this inode */
	unsigned int uid;	/* allows finding which FileInfo structure */
	__u32 pid;		/* process id who opened file */
	__u16 netfid;		/* file id from remote */
	/* BB add lock scope info here if needed */ ;
	/* lock scope id (0 if none) */
	struct file * pfile; /* needed for writepage */
	struct inode * pInode; /* needed for oplock break */
J
[CIFS]  
Jeremy Allison 已提交
314 315
	struct semaphore lock_sem;
	struct list_head llist; /* list of byte range locks we have. */
L
Linus Torvalds 已提交
316 317
	unsigned closePend:1;	/* file is marked to close */
	unsigned invalidHandle:1;  /* file closed via session abend */
318
	atomic_t wrtPending;   /* handle in use - defer close */
L
Linus Torvalds 已提交
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353
	struct semaphore fh_sem; /* prevents reopen race after dead ses*/
	char * search_resume_name; /* BB removeme BB */
	struct cifs_search_info srch_inf;
};

/*
 * One of these for each file inode
 */

struct cifsInodeInfo {
	struct list_head lockList;
	/* BB add in lists for dirty pages - i.e. write caching info for oplock */
	struct list_head openFileList;
	int write_behind_rc;
	__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
	atomic_t inUse;	 /* num concurrent users (local openers cifs) of file*/
	unsigned long time;	/* jiffies of last update/check of inode */
	unsigned clientCanCacheRead:1; /* read oplock */
	unsigned clientCanCacheAll:1;  /* read and writebehind oplock */
	unsigned oplockPending:1;
	struct inode vfs_inode;
};

static inline struct cifsInodeInfo *
CIFS_I(struct inode *inode)
{
	return container_of(inode, struct cifsInodeInfo, vfs_inode);
}

static inline struct cifs_sb_info *
CIFS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

S
Steve French 已提交
354
static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
355 356 357 358 359 360
{
	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
		return '/';
	else
		return '\\';
}
L
Linus Torvalds 已提交
361

362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389
#ifdef CONFIG_CIFS_STATS
#define cifs_stats_inc atomic_inc

static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
					    unsigned int bytes)
{
	if (bytes) {
		spin_lock(&tcon->stat_lock);
		tcon->bytes_written += bytes;
		spin_unlock(&tcon->stat_lock);
	}
}

static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
					 unsigned int bytes)
{
	spin_lock(&tcon->stat_lock);
	tcon->bytes_read += bytes;
	spin_unlock(&tcon->stat_lock);
}
#else

#define  cifs_stats_inc(field) do {} while(0)
#define  cifs_stats_bytes_written(tcon, bytes) do {} while(0)
#define  cifs_stats_bytes_read(tcon, bytes) do {} while(0)

#endif

L
Linus Torvalds 已提交
390 391 392 393 394 395
/* one of these for every pending CIFS request to the server */
struct mid_q_entry {
	struct list_head qhead;	/* mids waiting on reply from this server */
	__u16 mid;		/* multiplex id */
	__u16 pid;		/* process id */
	__u32 sequence_number;  /* for CIFS signing */
S
Steve French 已提交
396 397 398 399 400
	unsigned long when_alloc;  /* when mid was created */
#ifdef CONFIG_CIFS_STATS2
	unsigned long when_sent; /* time when smb send finished */
	unsigned long when_received; /* when demux complete (taken off wire) */
#endif
L
Linus Torvalds 已提交
401 402 403 404
	struct cifsSesInfo *ses;	/* smb was sent to this server */
	struct task_struct *tsk;	/* task waiting for response */
	struct smb_hdr *resp_buf;	/* response buffer */
	int midState;	/* wish this were enum but can not pass to wait_event */
405 406
	__u8 command;	/* smb command code */
	unsigned largeBuf:1;    /* if valid response, is pointer to large buf */
407 408
	unsigned multiRsp:1;   /* multiple trans2 responses for one request  */
	unsigned multiEnd:1; /* both received */
L
Linus Torvalds 已提交
409 410 411 412 413 414 415 416 417
};

struct oplock_q_entry {
	struct list_head qhead;
	struct inode * pinode;
	struct cifsTconInfo * tcon; 
	__u16 netfid;
};

418 419 420 421 422 423 424 425 426 427 428
/* for pending dnotify requests */
struct dir_notify_req {
       struct list_head lhead;
       __le16 Pid;
       __le16 PidHigh;
       __u16 Mid;
       __u16 Tid;
       __u16 Uid;
       __u16 netfid;
       __u32 filter; /* CompletionFilter (for multishot) */
       int multishot;
429
       struct file * pfile;
430 431
};

L
Linus Torvalds 已提交
432 433 434 435 436 437
#define   MID_FREE 0
#define   MID_REQUEST_ALLOCATED 1
#define   MID_REQUEST_SUBMITTED 2
#define   MID_RESPONSE_RECEIVED 4
#define   MID_RETRY_NEEDED      8 /* session closed while this request out */
#define   MID_NO_RESP_NEEDED 0x10
438 439 440 441 442 443

/* Types of response buffer returned from SendReceive2 */
#define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
#define   CIFS_SMALL_BUFFER     1
#define   CIFS_LARGE_BUFFER     2
#define   CIFS_IOVEC            4    /* array of response buffers */
L
Linus Torvalds 已提交
444

445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473
/* Security Flags: indicate type of session setup needed */
#define   CIFSSEC_MAY_SIGN	0x00001
#define   CIFSSEC_MAY_NTLM	0x00002
#define   CIFSSEC_MAY_NTLMV2	0x00004
#define   CIFSSEC_MAY_KRB5	0x00008
#ifdef CONFIG_CIFS_WEAK_PW_HASH
#define   CIFSSEC_MAY_LANMAN	0x00010
#define   CIFSSEC_MAY_PLNTXT	0x00020
#endif /* weak passwords */
#define   CIFSSEC_MAY_SEAL	0x00040 /* not supported yet */

#define   CIFSSEC_MUST_SIGN	0x01001
/* note that only one of the following can be set so the
result of setting MUST flags more than once will be to
require use of the stronger protocol */
#define   CIFSSEC_MUST_NTLM	0x02002
#define   CIFSSEC_MUST_NTLMV2	0x04004
#define   CIFSSEC_MUST_KRB5	0x08008
#ifdef CONFIG_CIFS_WEAK_PW_HASH
#define   CIFSSEC_MUST_LANMAN	0x10010
#define   CIFSSEC_MUST_PLNTXT	0x20020
#define   CIFSSEC_MASK          0x37037 /* current flags supported if weak */
#else	  
#define	  CIFSSEC_MASK          0x07007 /* flags supported if no weak config */
#endif /* WEAK_PW_HASH */
#define   CIFSSEC_MUST_SEAL	0x40040 /* not supported yet */

#define   CIFSSEC_DEF  CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2
#define   CIFSSEC_MAX  CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2
L
Linus Torvalds 已提交
474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519
/*
 *****************************************************************
 * All constants go here
 *****************************************************************
 */

#define UID_HASH (16)

/*
 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
 * following to be declared.
 */

/****************************************************************************
 *  Locking notes.  All updates to global variables and lists should be
 *                  protected by spinlocks or semaphores.
 *
 *  Spinlocks
 *  ---------
 *  GlobalMid_Lock protects:
 *	list operations on pending_mid_q and oplockQ
 *      updates to XID counters, multiplex id  and SMB sequence numbers
 *  GlobalSMBSesLock protects:
 *	list operations on tcp and SMB session lists and tCon lists
 *  f_owner.lock protects certain per file struct operations
 *  mapping->page_lock protects certain per page operations
 *
 *  Semaphores
 *  ----------
 *  sesSem     operations on smb session
 *  tconSem    operations on tree connection
 *  fh_sem      file handle reconnection operations 
 *
 ****************************************************************************/

#ifdef DECLARE_GLOBALS_HERE
#define GLOBAL_EXTERN
#else
#define GLOBAL_EXTERN extern
#endif

/*
 * The list of servers that did not respond with NT LM 0.12.
 * This list helps improve performance and eliminate the messages indicating
 * that we had a communications error talking to the server in this list. 
 */
520 521
/* Feature not supported */
/* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */
L
Linus Torvalds 已提交
522 523 524 525 526 527

/*
 * The following is a hash table of all the users we know about.
 */
GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];

528
/* GLOBAL_EXTERN struct list_head GlobalServerList; BB not implemented yet */
L
Linus Torvalds 已提交
529 530 531 532 533 534
GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;  /* protects list inserts on 3 above */

GLOBAL_EXTERN struct list_head GlobalOplock_Q;

535 536 537 538
/* Outstanding dir notify requests */
GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
/* DirNotify response queue */
GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
539

L
Linus Torvalds 已提交
540 541 542 543
/*
 * Global transaction id (XID) information
 */
GLOBAL_EXTERN unsigned int GlobalCurrentXid;	/* protected by GlobalMid_Sem */
544
GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
L
Linus Torvalds 已提交
545
GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;	/* prot by GlobalMid_Sem */
546 547
GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
					  /* on midQ entries */
L
Linus Torvalds 已提交
548 549 550 551 552 553 554 555 556 557 558 559
GLOBAL_EXTERN char Local_System_Name[15];

/*
 *  Global counters, updated atomically
 */
GLOBAL_EXTERN atomic_t sesInfoAllocCount;
GLOBAL_EXTERN atomic_t tconInfoAllocCount;
GLOBAL_EXTERN atomic_t tcpSesAllocCount;
GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
GLOBAL_EXTERN atomic_t tconInfoReconnectCount;

/* Various Debug counters to remove someday (BB) */
560 561 562 563 564 565
GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
#ifdef CONFIG_CIFS_STATS2
GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
GLOBAL_EXTERN atomic_t totSmBufAllocCount;
#endif
GLOBAL_EXTERN atomic_t smBufAllocCount;
L
Linus Torvalds 已提交
566 567 568
GLOBAL_EXTERN atomic_t midCount;

/* Misc globals */
569
GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
L
Linus Torvalds 已提交
570 571 572 573 574 575 576 577 578 579 580 581 582 583 584
				to be established on existing mount if we
				have the uid/password or Kerberos credential 
				or equivalent for current user */
GLOBAL_EXTERN unsigned int oplockEnabled;
GLOBAL_EXTERN unsigned int experimEnabled;
GLOBAL_EXTERN unsigned int lookupCacheEnabled;
GLOBAL_EXTERN unsigned int extended_security;	/* if on, session setup sent 
				with more secure ntlmssp2 challenge/resp */
GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/