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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/cifsglob.h
3 *
Steve French5815449d2006-02-14 01:36:20 +00004 * Copyright (C) International Business Machines Corp., 2002,2006
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
Jeremy Allison7ee1af72006-08-02 21:56:33 +00006 * Jeremy Allison (jra@samba.org)
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
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.
12 *
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.
17 *
18 */
19#include <linux/in.h>
20#include <linux/in6.h>
21#include "cifs_fs_sb.h"
22/*
23 * The sizes of various internal tables and strings
24 */
25#define MAX_UID_INFO 16
26#define MAX_SES_INFO 2
27#define MAX_TCON_INFO 4
28
29#define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1
30#define MAX_SERVER_SIZE 15
31#define MAX_SHARE_SIZE 64 /* used to be 20 - this should still be enough */
32#define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
33 termination then *2 for unicode versions */
34#define MAX_PASSWORD_SIZE 16
35
36#define CIFS_MIN_RCV_POOL 4
37
38/*
39 * MAX_REQ is the maximum number of requests that WE will send
40 * on one socket concurently. It also matches the most common
41 * value of max multiplex returned by servers. We may
42 * eventually want to use the negotiated value (in case
43 * future servers can handle more) when we are more confident that
44 * we will not have problems oveloading the socket with pending
45 * write data.
46 */
47#define CIFS_MAX_REQ 50
48
49#define SERVER_NAME_LENGTH 15
50#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
51
52/* used to define string lengths for reversing unicode strings */
53/* (256+1)*2 = 514 */
54/* (max path length + 1 for null) * 2 for unicode */
55#define MAX_NAME 514
56
57#include "cifspdu.h"
58
59#ifndef FALSE
60#define FALSE 0
61#endif
62
63#ifndef TRUE
64#define TRUE 1
65#endif
66
67#ifndef XATTR_DOS_ATTRIB
68#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
69#endif
70
71/*
72 * This information is kept on every Server we know about.
73 *
74 * Some things to note:
75 *
76 */
77#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
78
79/*
80 * CIFS vfs client Status information (based on what we know.)
81 */
82
83 /* associated with each tcp and smb session */
84enum statusEnum {
85 CifsNew = 0,
86 CifsGood,
87 CifsExiting,
88 CifsNeedReconnect
89};
90
91enum securityEnum {
Steve French39798772006-05-31 22:40:51 +000092 LANMAN = 0, /* Legacy LANMAN auth */
93 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
95 RawNTLMSSP, /* NTLMSSP without SPNEGO */
96 NTLMSSP, /* NTLMSSP via SPNEGO */
97 Kerberos /* Kerberos via SPNEGO */
98};
99
100enum protocolEnum {
101 IPV4 = 0,
102 IPV6,
103 SCTP
104 /* Netbios frames protocol not supported at this time */
105};
106
107/*
108 *****************************************************************
109 * Except the CIFS PDUs themselves all the
110 * globally interesting structs should go here
111 *****************************************************************
112 */
113
114struct TCP_Server_Info {
Steve Frencha10faeb22005-08-22 21:38:31 -0700115 /* 15 character server name + 0x20 16th byte indicating type = srv */
116 char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
Steve Frenchd3485d32005-08-19 11:04:29 -0700117 char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 struct socket *ssocket;
119 union {
120 struct sockaddr_in sockAddr;
121 struct sockaddr_in6 sockAddr6;
122 } addr;
123 wait_queue_head_t response_q;
124 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
125 struct list_head pending_mid_q;
126 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
127 unsigned short server_codepage; /* codepage for the server */
Steve French131afd0b2005-10-07 09:51:05 -0700128 unsigned long ip_address; /* IP addr for the server if known */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 enum protocolEnum protocolType;
130 char versionMajor;
131 char versionMinor;
132 unsigned svlocal:1; /* local server or remote */
133 atomic_t socketUseCount; /* number of open cifs sessions on socket */
134 atomic_t inFlight; /* number of requests on the wire to server */
Steve French131afd0b2005-10-07 09:51:05 -0700135#ifdef CONFIG_CIFS_STATS2
136 atomic_t inSend; /* requests trying to send */
137 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
138#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 enum statusEnum tcpStatus; /* what we think the status is */
140 struct semaphore tcpSem;
141 struct task_struct *tsk;
142 char server_GUID[16];
143 char secMode;
144 enum securityEnum secType;
145 unsigned int maxReq; /* Clients should submit no more */
146 /* than maxReq distinct unanswered SMBs to the server when using */
147 /* multiplexed reads or writes */
148 unsigned int maxBuf; /* maxBuf specifies the maximum */
149 /* message size the server can send or receive for non-raw SMBs */
150 unsigned int maxRw; /* maxRw specifies the maximum */
151 /* message size the server can send or receive for */
152 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
153 char sessid[4]; /* unique token id for this session */
154 /* (returned on Negotiate */
155 int capabilities; /* allow selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000156 int timeAdj; /* Adjust for difference in server time zone in sec */
Steve French1982c342005-08-17 12:38:22 -0700157 __u16 CurrentMid; /* multiplex id - rotating counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
Steve Frencha10faeb22005-08-22 21:38:31 -0700159 /* 16th byte of RFC1001 workstation name is always null */
160 char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
Steve Frenchad009ac2005-04-28 22:41:05 -0700161 __u32 sequence_number; /* needed for CIFS PDU signature */
Steve French3a5ff612006-07-14 22:37:11 +0000162 char mac_signing_key[CIFS_SESS_KEY_SIZE + 16];
163 unsigned long lstrp; /* when we got last response from this server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164};
165
166/*
167 * The following is our shortcut to user information. We surface the uid,
168 * and name. We always get the password on the fly in case it
169 * has changed. We also hang a list of sessions owned by this user off here.
170 */
171struct cifsUidInfo {
172 struct list_head userList;
173 struct list_head sessionList; /* SMB sessions for this user */
174 uid_t linux_uid;
175 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
176 /* BB may need ptr or callback for PAM or WinBind info */
177};
178
179/*
180 * Session structure. One of these for each uid session with a particular host
181 */
182struct cifsSesInfo {
183 struct list_head cifsSessionList;
184 struct semaphore sesSem;
Steve French39798772006-05-31 22:40:51 +0000185#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 struct cifsUidInfo *uidInfo; /* pointer to user info */
Steve French39798772006-05-31 22:40:51 +0000187#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 struct TCP_Server_Info *server; /* pointer to server info */
189 atomic_t inUse; /* # of mounts (tree connections) on this ses */
190 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000191 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 __u16 ipc_tid; /* special tid for connection to IPC share */
193 __u16 flags;
Steve Frenchad009ac2005-04-28 22:41:05 -0700194 char *serverOS; /* name of operating system underlying server */
195 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 char *serverDomain; /* security realm of server */
197 int Suid; /* remote smb uid */
198 uid_t linux_uid; /* local Linux uid */
199 int capabilities;
Steve Frenchad009ac2005-04-28 22:41:05 -0700200 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
201 TCP names - will ipv6 and sctp addresses fit? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 char userName[MAX_USERNAME_SIZE + 1];
Steve French39798772006-05-31 22:40:51 +0000203 char * domainName;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 char * password;
205};
Steve French9ac00b72006-09-30 04:13:17 +0000206/* no more than one of the following three session flags may be set */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207#define CIFS_SES_NT4 1
Steve French9ac00b72006-09-30 04:13:17 +0000208#define CIFS_SES_OS2 2
209#define CIFS_SES_W9X 4
210/* following flag is set for old servers such as OS2 (and Win95?)
211 which do not negotiate NTLM or POSIX dialects, but instead
212 negotiate one of the older LANMAN dialects */
213#define CIFS_SES_LANMAN 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214/*
215 * there is one of these for each connection to a resource on a particular
216 * session
217 */
218struct cifsTconInfo {
219 struct list_head cifsConnectionList;
220 struct list_head openFileList;
221 struct semaphore tconSem;
222 struct cifsSesInfo *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000223 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 char *nativeFileSystem;
225 __u16 tid; /* The 2 byte tree id */
226 __u16 Flags; /* optional support bits */
227 enum statusEnum tidStatus;
Steve French254e55e2006-06-04 05:53:15 +0000228 atomic_t useCount; /* how many explicit/implicit mounts to share */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229#ifdef CONFIG_CIFS_STATS
230 atomic_t num_smbs_sent;
231 atomic_t num_writes;
232 atomic_t num_reads;
233 atomic_t num_oplock_brks;
234 atomic_t num_opens;
Steve Frencha5a2b482005-08-20 21:42:53 -0700235 atomic_t num_closes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 atomic_t num_deletes;
237 atomic_t num_mkdirs;
238 atomic_t num_rmdirs;
239 atomic_t num_renames;
240 atomic_t num_t2renames;
Steve Frenchdfb75332005-06-22 17:13:47 -0700241 atomic_t num_ffirst;
242 atomic_t num_fnext;
243 atomic_t num_fclose;
Steve Frencha5a2b482005-08-20 21:42:53 -0700244 atomic_t num_hardlinks;
245 atomic_t num_symlinks;
246 atomic_t num_locks;
Steve French0a4b92c2006-01-12 15:44:21 -0800247 atomic_t num_acl_get;
248 atomic_t num_acl_set;
Steve Frencha5a2b482005-08-20 21:42:53 -0700249#ifdef CONFIG_CIFS_STATS2
250 unsigned long long time_writes;
251 unsigned long long time_reads;
252 unsigned long long time_opens;
253 unsigned long long time_deletes;
254 unsigned long long time_closes;
255 unsigned long long time_mkdirs;
256 unsigned long long time_rmdirs;
257 unsigned long long time_renames;
258 unsigned long long time_t2renames;
259 unsigned long long time_ffirst;
260 unsigned long long time_fnext;
261 unsigned long long time_fclose;
262#endif /* CONFIG_CIFS_STATS2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 __u64 bytes_read;
264 __u64 bytes_written;
265 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700266#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000268 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
270 unsigned retry:1;
Steve Frenchd3485d32005-08-19 11:04:29 -0700271 unsigned nocase:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 /* BB add field for back pointer to sb struct? */
273};
274
275/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000276 * This info hangs off the cifsFileInfo structure, pointed to by llist.
277 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 */
279struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000280 struct list_head llist; /* pointer to next cifsLockInfo */
281 __u64 offset;
282 __u64 length;
283 __u8 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284};
285
286/*
287 * One of these for each open instance of a file
288 */
289struct cifs_search_info {
290 loff_t index_of_last_entry;
291 __u16 entries_in_buffer;
292 __u16 info_level;
293 __u32 resume_key;
294 char * ntwrk_buf_start;
295 char * srch_entries_start;
296 char * presume_name;
297 unsigned int resume_name_len;
298 unsigned endOfSearch:1;
299 unsigned emptyDir:1;
300 unsigned unicode:1;
Steve Frenchec637e32005-12-12 20:53:18 -0800301 unsigned smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302};
303
304struct cifsFileInfo {
305 struct list_head tlist; /* pointer to next fid owned by tcon */
306 struct list_head flist; /* next fid (file instance) for this inode */
307 unsigned int uid; /* allows finding which FileInfo structure */
308 __u32 pid; /* process id who opened file */
309 __u16 netfid; /* file id from remote */
310 /* BB add lock scope info here if needed */ ;
311 /* lock scope id (0 if none) */
312 struct file * pfile; /* needed for writepage */
313 struct inode * pInode; /* needed for oplock break */
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000314 struct semaphore lock_sem;
315 struct list_head llist; /* list of byte range locks we have. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 unsigned closePend:1; /* file is marked to close */
317 unsigned invalidHandle:1; /* file closed via session abend */
Steve French23e7dd72005-10-20 13:44:56 -0700318 atomic_t wrtPending; /* handle in use - defer close */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 struct semaphore fh_sem; /* prevents reopen race after dead ses*/
320 char * search_resume_name; /* BB removeme BB */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 struct cifs_search_info srch_inf;
322};
323
324/*
325 * One of these for each file inode
326 */
327
328struct cifsInodeInfo {
329 struct list_head lockList;
330 /* BB add in lists for dirty pages - i.e. write caching info for oplock */
331 struct list_head openFileList;
332 int write_behind_rc;
333 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
334 atomic_t inUse; /* num concurrent users (local openers cifs) of file*/
335 unsigned long time; /* jiffies of last update/check of inode */
336 unsigned clientCanCacheRead:1; /* read oplock */
337 unsigned clientCanCacheAll:1; /* read and writebehind oplock */
338 unsigned oplockPending:1;
339 struct inode vfs_inode;
340};
341
342static inline struct cifsInodeInfo *
343CIFS_I(struct inode *inode)
344{
345 return container_of(inode, struct cifsInodeInfo, vfs_inode);
346}
347
348static inline struct cifs_sb_info *
349CIFS_SB(struct super_block *sb)
350{
351 return sb->s_fs_info;
352}
353
Steve Frenchab2f2182005-09-15 20:44:50 -0700354static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -0700355{
356 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
357 return '/';
358 else
359 return '\\';
360}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Steve Frencha4544342005-08-24 13:59:35 -0700362#ifdef CONFIG_CIFS_STATS
363#define cifs_stats_inc atomic_inc
364
365static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
366 unsigned int bytes)
367{
368 if (bytes) {
369 spin_lock(&tcon->stat_lock);
370 tcon->bytes_written += bytes;
371 spin_unlock(&tcon->stat_lock);
372 }
373}
374
375static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
376 unsigned int bytes)
377{
378 spin_lock(&tcon->stat_lock);
379 tcon->bytes_read += bytes;
380 spin_unlock(&tcon->stat_lock);
381}
382#else
383
384#define cifs_stats_inc(field) do {} while(0)
385#define cifs_stats_bytes_written(tcon, bytes) do {} while(0)
386#define cifs_stats_bytes_read(tcon, bytes) do {} while(0)
387
388#endif
389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390/* one of these for every pending CIFS request to the server */
391struct mid_q_entry {
392 struct list_head qhead; /* mids waiting on reply from this server */
393 __u16 mid; /* multiplex id */
394 __u16 pid; /* process id */
395 __u32 sequence_number; /* for CIFS signing */
Steve French1047abc2005-10-11 19:58:06 -0700396 unsigned long when_alloc; /* when mid was created */
397#ifdef CONFIG_CIFS_STATS2
398 unsigned long when_sent; /* time when smb send finished */
399 unsigned long when_received; /* when demux complete (taken off wire) */
400#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 struct cifsSesInfo *ses; /* smb was sent to this server */
402 struct task_struct *tsk; /* task waiting for response */
403 struct smb_hdr *resp_buf; /* response buffer */
404 int midState; /* wish this were enum but can not pass to wait_event */
Steve Frenchc81156d2005-04-28 22:41:07 -0700405 __u8 command; /* smb command code */
Steve Frenchc81156d2005-04-28 22:41:07 -0700406 unsigned largeBuf:1; /* if valid response, is pointer to large buf */
Steve French39798772006-05-31 22:40:51 +0000407 unsigned multiRsp:1; /* multiple trans2 responses for one request */
408 unsigned multiEnd:1; /* both received */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409};
410
411struct oplock_q_entry {
412 struct list_head qhead;
413 struct inode * pinode;
414 struct cifsTconInfo * tcon;
415 __u16 netfid;
416};
417
Steve Frenchff5dbd92005-08-24 17:10:36 -0700418/* for pending dnotify requests */
419struct dir_notify_req {
420 struct list_head lhead;
421 __le16 Pid;
422 __le16 PidHigh;
423 __u16 Mid;
424 __u16 Tid;
425 __u16 Uid;
426 __u16 netfid;
427 __u32 filter; /* CompletionFilter (for multishot) */
428 int multishot;
Steve Frenche22cb8b2005-08-24 20:25:21 -0700429 struct file * pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700430};
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432#define MID_FREE 0
433#define MID_REQUEST_ALLOCATED 1
434#define MID_REQUEST_SUBMITTED 2
435#define MID_RESPONSE_RECEIVED 4
436#define MID_RETRY_NEEDED 8 /* session closed while this request out */
437#define MID_NO_RESP_NEEDED 0x10
Steve Frenchec637e32005-12-12 20:53:18 -0800438
439/* Types of response buffer returned from SendReceive2 */
440#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
441#define CIFS_SMALL_BUFFER 1
442#define CIFS_LARGE_BUFFER 2
443#define CIFS_IOVEC 4 /* array of response buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Steve French39798772006-05-31 22:40:51 +0000445/* Security Flags: indicate type of session setup needed */
446#define CIFSSEC_MAY_SIGN 0x00001
447#define CIFSSEC_MAY_NTLM 0x00002
448#define CIFSSEC_MAY_NTLMV2 0x00004
449#define CIFSSEC_MAY_KRB5 0x00008
450#ifdef CONFIG_CIFS_WEAK_PW_HASH
451#define CIFSSEC_MAY_LANMAN 0x00010
452#define CIFSSEC_MAY_PLNTXT 0x00020
453#endif /* weak passwords */
454#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve French5815449d2006-02-14 01:36:20 +0000455
Steve French39798772006-05-31 22:40:51 +0000456#define CIFSSEC_MUST_SIGN 0x01001
457/* note that only one of the following can be set so the
458result of setting MUST flags more than once will be to
459require use of the stronger protocol */
460#define CIFSSEC_MUST_NTLM 0x02002
461#define CIFSSEC_MUST_NTLMV2 0x04004
462#define CIFSSEC_MUST_KRB5 0x08008
463#ifdef CONFIG_CIFS_WEAK_PW_HASH
464#define CIFSSEC_MUST_LANMAN 0x10010
465#define CIFSSEC_MUST_PLNTXT 0x20020
466#define CIFSSEC_MASK 0x37037 /* current flags supported if weak */
467#else
468#define CIFSSEC_MASK 0x07007 /* flags supported if no weak config */
469#endif /* WEAK_PW_HASH */
470#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
471
472#define CIFSSEC_DEF CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2
473#define CIFSSEC_MAX CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474/*
475 *****************************************************************
476 * All constants go here
477 *****************************************************************
478 */
479
480#define UID_HASH (16)
481
482/*
483 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
484 * following to be declared.
485 */
486
487/****************************************************************************
488 * Locking notes. All updates to global variables and lists should be
489 * protected by spinlocks or semaphores.
490 *
491 * Spinlocks
492 * ---------
493 * GlobalMid_Lock protects:
494 * list operations on pending_mid_q and oplockQ
495 * updates to XID counters, multiplex id and SMB sequence numbers
496 * GlobalSMBSesLock protects:
497 * list operations on tcp and SMB session lists and tCon lists
498 * f_owner.lock protects certain per file struct operations
499 * mapping->page_lock protects certain per page operations
500 *
501 * Semaphores
502 * ----------
503 * sesSem operations on smb session
504 * tconSem operations on tree connection
505 * fh_sem file handle reconnection operations
506 *
507 ****************************************************************************/
508
509#ifdef DECLARE_GLOBALS_HERE
510#define GLOBAL_EXTERN
511#else
512#define GLOBAL_EXTERN extern
513#endif
514
515/*
516 * The list of servers that did not respond with NT LM 0.12.
517 * This list helps improve performance and eliminate the messages indicating
518 * that we had a communications error talking to the server in this list.
519 */
Steve French2cd646a2006-09-28 19:43:08 +0000520/* Feature not supported */
521/* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523/*
524 * The following is a hash table of all the users we know about.
525 */
526GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];
527
528GLOBAL_EXTERN struct list_head GlobalServerList; /* BB not implemented yet */
529GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
530GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
531GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; /* protects list inserts on 3 above */
532
533GLOBAL_EXTERN struct list_head GlobalOplock_Q;
534
Steve Frenchff5dbd92005-08-24 17:10:36 -0700535GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; /* Outstanding dir notify requests */
Steve French254e55e2006-06-04 05:53:15 +0000536GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;/* DirNotify response queue */
Steve Frenchff5dbd92005-08-24 17:10:36 -0700537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538/*
539 * Global transaction id (XID) information
540 */
541GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000542GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000544GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
545 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546GLOBAL_EXTERN char Local_System_Name[15];
547
548/*
549 * Global counters, updated atomically
550 */
551GLOBAL_EXTERN atomic_t sesInfoAllocCount;
552GLOBAL_EXTERN atomic_t tconInfoAllocCount;
553GLOBAL_EXTERN atomic_t tcpSesAllocCount;
554GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
555GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
556
557/* Various Debug counters to remove someday (BB) */
Steve French4498eed52005-12-03 13:58:57 -0800558GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
559#ifdef CONFIG_CIFS_STATS2
560GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
561GLOBAL_EXTERN atomic_t totSmBufAllocCount;
562#endif
563GLOBAL_EXTERN atomic_t smBufAllocCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564GLOBAL_EXTERN atomic_t midCount;
565
566/* Misc globals */
Steve French254e55e2006-06-04 05:53:15 +0000567GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 to be established on existing mount if we
569 have the uid/password or Kerberos credential
570 or equivalent for current user */
571GLOBAL_EXTERN unsigned int oplockEnabled;
572GLOBAL_EXTERN unsigned int experimEnabled;
573GLOBAL_EXTERN unsigned int lookupCacheEnabled;
574GLOBAL_EXTERN unsigned int extended_security; /* if on, session setup sent
575 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
578GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
579GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
580GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
581GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
582