fs/cifs/cifsglob.h

   1 /*
   2  *   fs/cifs/cifsglob.h
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *              Jeremy Allison (jra@samba.org)
   7  *
   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 #include "cifsacl.h"
  23 /*
  24  * The sizes of various internal tables and strings
  25  */
  26 #define MAX_UID_INFO 16
  27 #define MAX_SES_INFO 2
  28 #define MAX_TCON_INFO 4
  29
  30 #define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1
  31 #define MAX_SERVER_SIZE 15
  32 #define MAX_SHARE_SIZE  64      /* used to be 20, this should still be enough */
  33 #define MAX_USERNAME_SIZE 32    /* 32 is to allow for 15 char names + null
  34                                    termination then *2 for unicode versions */
  35 #define MAX_PASSWORD_SIZE 16
  36
  37 #define CIFS_MIN_RCV_POOL 4
  38
  39 /*
  40  * MAX_REQ is the maximum number of requests that WE will send
  41  * on one socket concurently. It also matches the most common
  42  * value of max multiplex returned by servers.  We may
  43  * eventually want to use the negotiated value (in case
  44  * future servers can handle more) when we are more confident that
  45  * we will not have problems oveloading the socket with pending
  46  * write data.
  47  */
  48 #define CIFS_MAX_REQ 50
  49
  50 #define SERVER_NAME_LENGTH 15
  51 #define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
  52
  53 /* used to define string lengths for reversing unicode strings */
  54 /*         (256+1)*2 = 514                                     */
  55 /*           (max path length + 1 for null) * 2 for unicode    */
  56 #define MAX_NAME 514
  57
  58 #include "cifspdu.h"
  59
  60 #ifndef FALSE
  61 #define FALSE 0
  62 #endif
  63
  64 #ifndef TRUE
  65 #define TRUE 1
  66 #endif
  67
  68 #ifndef XATTR_DOS_ATTRIB
  69 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  70 #endif
  71
  72 /*
  73  * This information is kept on every Server we know about.
  74  *
  75  * Some things to note:
  76  *
  77  */
  78 #define SERVER_NAME_LEN_WITH_NULL       (SERVER_NAME_LENGTH + 1)
  79
  80 /*
  81  * CIFS vfs client Status information (based on what we know.)
  82  */
  83
  84  /* associated with each tcp and smb session */
  85 enum statusEnum {
  86         CifsNew = 0,
  87         CifsGood,
  88         CifsExiting,
  89         CifsNeedReconnect
  90 };
  91
  92 enum securityEnum {
  93         PLAINTXT = 0,           /* Legacy with Plaintext passwords */
  94         LANMAN,                 /* Legacy LANMAN auth */
  95         NTLM,                   /* Legacy NTLM012 auth with NTLM hash */
  96         NTLMv2,                 /* Legacy NTLM auth with NTLMv2 hash */
  97         RawNTLMSSP,             /* NTLMSSP without SPNEGO */
  98         NTLMSSP,                /* NTLMSSP via SPNEGO */
  99         Kerberos                /* Kerberos via SPNEGO */
 100 };
 101
 102 enum protocolEnum {
 103         IPV4 = 0,
 104         IPV6,
 105         SCTP
 106         /* Netbios frames protocol not supported at this time */
 107 };
 108
 109 struct mac_key {
 110         unsigned int len;
 111         union {
 112                 char ntlm[CIFS_SESS_KEY_SIZE + 16];
 113                 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
 114                 struct {
 115                         char key[16];
 116                         struct ntlmv2_resp resp;
 117                 } ntlmv2;
 118         } data;
 119 };
 120
 121 struct cifs_cred {
 122         int uid;
 123         int gid;
 124         int mode;
 125         int cecount;
 126         struct cifs_sid osid;
 127         struct cifs_sid gsid;
 128         struct cifs_ntace *ntaces;
 129         struct cifs_ace *aces;
 130 };
 131
 132 /*
 133  *****************************************************************
 134  * Except the CIFS PDUs themselves all the
 135  * globally interesting structs should go here
 136  *****************************************************************
 137  */
 138
 139 struct TCP_Server_Info {
 140         /* 15 character server name + 0x20 16th byte indicating type = srv */
 141         char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
 142         char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
 143         char *hostname; /* hostname portion of UNC string */
 144         struct socket *ssocket;
 145         union {
 146                 struct sockaddr_in sockAddr;
 147                 struct sockaddr_in6 sockAddr6;
 148         } addr;
 149         wait_queue_head_t response_q;
 150         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 151         struct list_head pending_mid_q;
 152         void *Server_NlsInfo;   /* BB - placeholder for future NLS info  */
 153         unsigned short server_codepage; /* codepage for the server    */
 154         unsigned long ip_address;       /* IP addr for the server if known */
 155         enum protocolEnum protocolType;
 156         char versionMajor;
 157         char versionMinor;
 158         unsigned svlocal:1;     /* local server or remote */
 159         atomic_t socketUseCount; /* number of open cifs sessions on socket */
 160         atomic_t inFlight;  /* number of requests on the wire to server */
 161 #ifdef CONFIG_CIFS_STATS2
 162         atomic_t inSend; /* requests trying to send */
 163         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 164 #endif
 165         enum statusEnum tcpStatus; /* what we think the status is */
 166         struct semaphore tcpSem;
 167         struct task_struct *tsk;
 168         char server_GUID[16];
 169         char secMode;
 170         enum securityEnum secType;
 171         unsigned int maxReq;    /* Clients should submit no more */
 172         /* than maxReq distinct unanswered SMBs to the server when using  */
 173         /* multiplexed reads or writes */
 174         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 175         /* message size the server can send or receive for non-raw SMBs */
 176         unsigned int maxRw;     /* maxRw specifies the maximum */
 177         /* message size the server can send or receive for */
 178         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 179         char sessid[4];         /* unique token id for this session */
 180         /* (returned on Negotiate */
 181         int capabilities; /* allow selective disabling of caps by smb sess */
 182         int timeAdj;  /* Adjust for difference in server time zone in sec */
 183         __u16 CurrentMid;         /* multiplex id - rotating counter */
 184         char cryptKey[CIFS_CRYPTO_KEY_SIZE];
 185         /* 16th byte of RFC1001 workstation name is always null */
 186         char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
 187         __u32 sequence_number; /* needed for CIFS PDU signature */
 188         struct mac_key mac_signing_key;
 189         char ntlmv2_hash[16];
 190         unsigned long lstrp; /* when we got last response from this server */
 191 };
 192
 193 /*
 194  * The following is our shortcut to user information.  We surface the uid,
 195  * and name. We always get the password on the fly in case it
 196  * has changed. We also hang a list of sessions owned by this user off here.
 197  */
 198 struct cifsUidInfo {
 199         struct list_head userList;
 200         struct list_head sessionList; /* SMB sessions for this user */
 201         uid_t linux_uid;
 202         char user[MAX_USERNAME_SIZE + 1];       /* ascii name of user */
 203         /* BB may need ptr or callback for PAM or WinBind info */
 204 };
 205
 206 /*
 207  * Session structure.  One of these for each uid session with a particular host
 208  */
 209 struct cifsSesInfo {
 210         struct list_head cifsSessionList;
 211         struct semaphore sesSem;
 212 #if 0
 213         struct cifsUidInfo *uidInfo;    /* pointer to user info */
 214 #endif
 215         struct TCP_Server_Info *server; /* pointer to server info */
 216         atomic_t inUse; /* # of mounts (tree connections) on this ses */
 217         enum statusEnum status;
 218         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 219         __u16 ipc_tid;          /* special tid for connection to IPC share */
 220         __u16 flags;
 221         char *serverOS;         /* name of operating system underlying server */
 222         char *serverNOS;        /* name of network operating system of server */
 223         char *serverDomain;     /* security realm of server */
 224         int Suid;               /* remote smb uid  */
 225         uid_t linux_uid;        /* local Linux uid */
 226         int capabilities;
 227         char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
 228                                 TCP names - will ipv6 and sctp addresses fit? */
 229         char userName[MAX_USERNAME_SIZE + 1];
 230         char *domainName;
 231         char *password;
 232 };
 233 /* no more than one of the following three session flags may be set */
 234 #define CIFS_SES_NT4 1
 235 #define CIFS_SES_OS2 2
 236 #define CIFS_SES_W9X 4
 237 /* following flag is set for old servers such as OS2 (and Win95?)
 238    which do not negotiate NTLM or POSIX dialects, but instead
 239    negotiate one of the older LANMAN dialects */
 240 #define CIFS_SES_LANMAN 8
 241 /*
 242  * there is one of these for each connection to a resource on a particular
 243  * session
 244  */
 245 struct cifsTconInfo {
 246         struct list_head cifsConnectionList;
 247         struct list_head openFileList;
 248         struct semaphore tconSem;
 249         struct cifsSesInfo *ses;        /* pointer to session associated with */
 250         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 251         char *nativeFileSystem;
 252         __u16 tid;              /* The 2 byte tree id */
 253         __u16 Flags;            /* optional support bits */
 254         enum statusEnum tidStatus;
 255         atomic_t useCount;      /* how many explicit/implicit mounts to share */
 256 #ifdef CONFIG_CIFS_STATS
 257         atomic_t num_smbs_sent;
 258         atomic_t num_writes;
 259         atomic_t num_reads;
 260         atomic_t num_oplock_brks;
 261         atomic_t num_opens;
 262         atomic_t num_closes;
 263         atomic_t num_deletes;
 264         atomic_t num_mkdirs;
 265         atomic_t num_rmdirs;
 266         atomic_t num_renames;
 267         atomic_t num_t2renames;
 268         atomic_t num_ffirst;
 269         atomic_t num_fnext;
 270         atomic_t num_fclose;
 271         atomic_t num_hardlinks;
 272         atomic_t num_symlinks;
 273         atomic_t num_locks;
 274         atomic_t num_acl_get;
 275         atomic_t num_acl_set;
 276 #ifdef CONFIG_CIFS_STATS2
 277         unsigned long long time_writes;
 278         unsigned long long time_reads;
 279         unsigned long long time_opens;
 280         unsigned long long time_deletes;
 281         unsigned long long time_closes;
 282         unsigned long long time_mkdirs;
 283         unsigned long long time_rmdirs;
 284         unsigned long long time_renames;
 285         unsigned long long time_t2renames;
 286         unsigned long long time_ffirst;
 287         unsigned long long time_fnext;
 288         unsigned long long time_fclose;
 289 #endif /* CONFIG_CIFS_STATS2 */
 290         __u64    bytes_read;
 291         __u64    bytes_written;
 292         spinlock_t stat_lock;
 293 #endif /* CONFIG_CIFS_STATS */
 294         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 295         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 296         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 297         unsigned ipc:1;         /* set if connection to IPC$ eg for RPC/PIPES */
 298         unsigned retry:1;
 299         unsigned nocase:1;
 300         unsigned unix_ext:1; /* if off disable Linux extensions to CIFS protocol
 301                                 for this mount even if server would support */
 302         /* BB add field for back pointer to sb struct(s)? */
 303 };
 304
 305 /*
 306  * This info hangs off the cifsFileInfo structure, pointed to by llist.
 307  * This is used to track byte stream locks on the file
 308  */
 309 struct cifsLockInfo {
 310         struct list_head llist; /* pointer to next cifsLockInfo */
 311         __u64 offset;
 312         __u64 length;
 313         __u8 type;
 314 };
 315
 316 /*
 317  * One of these for each open instance of a file
 318  */
 319 struct cifs_search_info {
 320         loff_t index_of_last_entry;
 321         __u16 entries_in_buffer;
 322         __u16 info_level;
 323         __u32 resume_key;
 324         char *ntwrk_buf_start;
 325         char *srch_entries_start;
 326         char *presume_name;
 327         unsigned int resume_name_len;
 328         unsigned endOfSearch:1;
 329         unsigned emptyDir:1;
 330         unsigned unicode:1;
 331         unsigned smallBuf:1; /* so we know which buf_release function to call */
 332 };
 333
 334 struct cifsFileInfo {
 335         struct list_head tlist; /* pointer to next fid owned by tcon */
 336         struct list_head flist; /* next fid (file instance) for this inode */
 337         unsigned int uid;       /* allows finding which FileInfo structure */
 338         __u32 pid;              /* process id who opened file */
 339         __u16 netfid;           /* file id from remote */
 340         /* BB add lock scope info here if needed */ ;
 341         /* lock scope id (0 if none) */
 342         struct file *pfile; /* needed for writepage */
 343         struct inode *pInode; /* needed for oplock break */
 344         struct mutex lock_mutex;
 345         struct list_head llist; /* list of byte range locks we have. */
 346         unsigned closePend:1;   /* file is marked to close */
 347         unsigned invalidHandle:1;  /* file closed via session abend */
 348         unsigned messageMode:1;    /* for pipes: message vs byte mode */
 349         atomic_t wrtPending;   /* handle in use - defer close */
 350         struct semaphore fh_sem; /* prevents reopen race after dead ses*/
 351         char *search_resume_name; /* BB removeme BB */
 352         struct cifs_search_info srch_inf;
 353 };
 354
 355 /*
 356  * One of these for each file inode
 357  */
 358
 359 struct cifsInodeInfo {
 360         struct list_head lockList;
 361         /* BB add in lists for dirty pages i.e. write caching info for oplock */
 362         struct list_head openFileList;
 363         int write_behind_rc;
 364         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
 365         atomic_t inUse;  /* num concurrent users (local openers cifs) of file*/
 366         unsigned long time;     /* jiffies of last update/check of inode */
 367         unsigned clientCanCacheRead:1; /* read oplock */
 368         unsigned clientCanCacheAll:1;  /* read and writebehind oplock */
 369         unsigned oplockPending:1;
 370         struct inode vfs_inode;
 371 };
 372
 373 static inline struct cifsInodeInfo *
 374 CIFS_I(struct inode *inode)
 375 {
 376         return container_of(inode, struct cifsInodeInfo, vfs_inode);
 377 }
 378
 379 static inline struct cifs_sb_info *
 380 CIFS_SB(struct super_block *sb)
 381 {
 382         return sb->s_fs_info;
 383 }
 384
 385 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
 386 {
 387         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
 388                 return '/';
 389         else
 390                 return '\\';
 391 }
 392
 393 #ifdef CONFIG_CIFS_STATS
 394 #define cifs_stats_inc atomic_inc
 395
 396 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
 397                                             unsigned int bytes)
 398 {
 399         if (bytes) {
 400                 spin_lock(&tcon->stat_lock);
 401                 tcon->bytes_written += bytes;
 402                 spin_unlock(&tcon->stat_lock);
 403         }
 404 }
 405
 406 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
 407                                          unsigned int bytes)
 408 {
 409         spin_lock(&tcon->stat_lock);
 410         tcon->bytes_read += bytes;
 411         spin_unlock(&tcon->stat_lock);
 412 }
 413 #else
 414
 415 #define  cifs_stats_inc(field) do {} while (0)
 416 #define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
 417 #define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
 418
 419 #endif
 420
 421 /* one of these for every pending CIFS request to the server */
 422 struct mid_q_entry {
 423         struct list_head qhead; /* mids waiting on reply from this server */
 424         __u16 mid;              /* multiplex id */
 425         __u16 pid;              /* process id */
 426         __u32 sequence_number;  /* for CIFS signing */
 427         unsigned long when_alloc;  /* when mid was created */
 428 #ifdef CONFIG_CIFS_STATS2
 429         unsigned long when_sent; /* time when smb send finished */
 430         unsigned long when_received; /* when demux complete (taken off wire) */
 431 #endif
 432         struct cifsSesInfo *ses;        /* smb was sent to this server */
 433         struct task_struct *tsk;        /* task waiting for response */
 434         struct smb_hdr *resp_buf;       /* response buffer */
 435         int midState;   /* wish this were enum but can not pass to wait_event */
 436         __u8 command;   /* smb command code */
 437         unsigned largeBuf:1;    /* if valid response, is pointer to large buf */
 438         unsigned multiRsp:1;   /* multiple trans2 responses for one request  */
 439         unsigned multiEnd:1; /* both received */
 440 };
 441
 442 struct oplock_q_entry {
 443         struct list_head qhead;
 444         struct inode *pinode;
 445         struct cifsTconInfo *tcon;
 446         __u16 netfid;
 447 };
 448
 449 /* for pending dnotify requests */
 450 struct dir_notify_req {
 451        struct list_head lhead;
 452        __le16 Pid;
 453        __le16 PidHigh;
 454        __u16 Mid;
 455        __u16 Tid;
 456        __u16 Uid;
 457        __u16 netfid;
 458        __u32 filter; /* CompletionFilter (for multishot) */
 459        int multishot;
 460        struct file *pfile;
 461 };
 462
 463 #define   MID_FREE 0
 464 #define   MID_REQUEST_ALLOCATED 1
 465 #define   MID_REQUEST_SUBMITTED 2
 466 #define   MID_RESPONSE_RECEIVED 4
 467 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
 468 #define   MID_NO_RESP_NEEDED 0x10
 469
 470 /* Types of response buffer returned from SendReceive2 */
 471 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
 472 #define   CIFS_SMALL_BUFFER     1
 473 #define   CIFS_LARGE_BUFFER     2
 474 #define   CIFS_IOVEC            4    /* array of response buffers */
 475
 476 /* Type of Request to SendReceive2 */
 477 #define   CIFS_STD_OP           0    /* normal request timeout */
 478 #define   CIFS_LONG_OP          1    /* long op (up to 45 sec, oplock time) */
 479 #define   CIFS_VLONG_OP         2    /* sloow op - can take up to 180 seconds */
 480 #define   CIFS_BLOCKING_OP      4    /* operation can block */
 481 #define   CIFS_ASYNC_OP         8    /* do not wait for response */
 482 #define   CIFS_TIMEOUT_MASK 0x00F    /* only one of 5 above set in req */
 483 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
 484 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
 485 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
 486
 487 /* Security Flags: indicate type of session setup needed */
 488 #define   CIFSSEC_MAY_SIGN      0x00001
 489 #define   CIFSSEC_MAY_NTLM      0x00002
 490 #define   CIFSSEC_MAY_NTLMV2    0x00004
 491 #define   CIFSSEC_MAY_KRB5      0x00008
 492 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 493 #define   CIFSSEC_MAY_LANMAN    0x00010
 494 #define   CIFSSEC_MAY_PLNTXT    0x00020
 495 #else
 496 #define   CIFSSEC_MAY_LANMAN    0
 497 #define   CIFSSEC_MAY_PLNTXT    0
 498 #endif /* weak passwords */
 499 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
 500
 501 #define   CIFSSEC_MUST_SIGN     0x01001
 502 /* note that only one of the following can be set so the
 503 result of setting MUST flags more than once will be to
 504 require use of the stronger protocol */
 505 #define   CIFSSEC_MUST_NTLM     0x02002
 506 #define   CIFSSEC_MUST_NTLMV2   0x04004
 507 #define   CIFSSEC_MUST_KRB5     0x08008
 508 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 509 #define   CIFSSEC_MUST_LANMAN   0x10010
 510 #define   CIFSSEC_MUST_PLNTXT   0x20020
 511 #ifdef CONFIG_CIFS_UPCALL
 512 #define   CIFSSEC_MASK          0x3F03F /* allows weak security but also krb5 */
 513 #else
 514 #define   CIFSSEC_MASK          0x37037 /* current flags supported if weak */
 515 #endif /* UPCALL */
 516 #else /* do not allow weak pw hash */
 517 #ifdef CONFIG_CIFS_UPCALL
 518 #define   CIFSSEC_MASK          0x0F00F /* flags supported if no weak allowed */
 519 #else
 520 #define   CIFSSEC_MASK          0x07007 /* flags supported if no weak allowed */
 521 #endif /* UPCALL */
 522 #endif /* WEAK_PW_HASH */
 523 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
 524
 525 #define   CIFSSEC_DEF  CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2
 526 #define   CIFSSEC_MAX  CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2
 527 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5)
 528 /*
 529  *****************************************************************
 530  * All constants go here
 531  *****************************************************************
 532  */
 533
 534 #define UID_HASH (16)
 535
 536 /*
 537  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
 538  * following to be declared.
 539  */
 540
 541 /****************************************************************************
 542  *  Locking notes.  All updates to global variables and lists should be
 543  *                  protected by spinlocks or semaphores.
 544  *
 545  *  Spinlocks
 546  *  ---------
 547  *  GlobalMid_Lock protects:
 548  *      list operations on pending_mid_q and oplockQ
 549  *      updates to XID counters, multiplex id  and SMB sequence numbers
 550  *  GlobalSMBSesLock protects:
 551  *      list operations on tcp and SMB session lists and tCon lists
 552  *  f_owner.lock protects certain per file struct operations
 553  *  mapping->page_lock protects certain per page operations
 554  *
 555  *  Semaphores
 556  *  ----------
 557  *  sesSem     operations on smb session
 558  *  tconSem    operations on tree connection
 559  *  fh_sem      file handle reconnection operations
 560  *
 561  ****************************************************************************/
 562
 563 #ifdef DECLARE_GLOBALS_HERE
 564 #define GLOBAL_EXTERN
 565 #else
 566 #define GLOBAL_EXTERN extern
 567 #endif
 568
 569 /*
 570  * The list of servers that did not respond with NT LM 0.12.
 571  * This list helps improve performance and eliminate the messages indicating
 572  * that we had a communications error talking to the server in this list.
 573  */
 574 /* Feature not supported */
 575 /* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */
 576
 577 /*
 578  * The following is a hash table of all the users we know about.
 579  */
 580 GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];
 581
 582 /* GLOBAL_EXTERN struct list_head GlobalServerList; BB not implemented yet */
 583 GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
 584 GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
 585 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;  /* protects list inserts on 3 above */
 586
 587 GLOBAL_EXTERN struct list_head GlobalOplock_Q;
 588
 589 /* Outstanding dir notify requests */
 590 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
 591 /* DirNotify response queue */
 592 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
 593
 594 /*
 595  * Global transaction id (XID) information
 596  */
 597 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
 598 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
 599 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
 600 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
 601                                           /* on midQ entries */
 602 GLOBAL_EXTERN char Local_System_Name[15];
 603
 604 /*
 605  *  Global counters, updated atomically
 606  */
 607 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
 608 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
 609 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
 610 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
 611 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
 612
 613 /* Various Debug counters to remove someday (BB) */
 614 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
 615 #ifdef CONFIG_CIFS_STATS2
 616 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
 617 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
 618 #endif
 619 GLOBAL_EXTERN atomic_t smBufAllocCount;
 620 GLOBAL_EXTERN atomic_t midCount;
 621
 622 /* Misc globals */
 623 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
 624                                 to be established on existing mount if we
 625                                 have the uid/password or Kerberos credential
 626                                 or equivalent for current user */
 627 GLOBAL_EXTERN unsigned int oplockEnabled;
 628 GLOBAL_EXTERN unsigned int experimEnabled;
 629 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
 630 GLOBAL_EXTERN unsigned int extended_security;   /* if on, session setup sent
 631                                 with more secure ntlmssp2 challenge/resp */
 632 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
 633 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
 634 GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
 635 GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
 636 GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
 637 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
 638