fs/cifs/cifsglob.h

   1 /*
   2  *   fs/cifs/cifsglob.h
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   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 #ifndef _CIFS_GLOB_H
  20 #define _CIFS_GLOB_H
  21
  22 #include <linux/in.h>
  23 #include <linux/in6.h>
  24 #include <linux/slab.h>
  25 #include <linux/slow-work.h>
  26 #include "cifs_fs_sb.h"
  27 #include "cifsacl.h"
  28 /*
  29  * The sizes of various internal tables and strings
  30  */
  31 #define MAX_UID_INFO 16
  32 #define MAX_SES_INFO 2
  33 #define MAX_TCON_INFO 4
  34
  35 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
  36 #define MAX_SERVER_SIZE 15
  37 #define MAX_SHARE_SIZE  64      /* used to be 20, this should still be enough */
  38 #define MAX_USERNAME_SIZE 32    /* 32 is to allow for 15 char names + null
  39                                    termination then *2 for unicode versions */
  40 #define MAX_PASSWORD_SIZE 16
  41
  42 #define CIFS_MIN_RCV_POOL 4
  43
  44 /*
  45  * MAX_REQ is the maximum number of requests that WE will send
  46  * on one socket concurrently. It also matches the most common
  47  * value of max multiplex returned by servers.  We may
  48  * eventually want to use the negotiated value (in case
  49  * future servers can handle more) when we are more confident that
  50  * we will not have problems oveloading the socket with pending
  51  * write data.
  52  */
  53 #define CIFS_MAX_REQ 50
  54
  55 #define RFC1001_NAME_LEN 15
  56 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
  57
  58 /* currently length of NIP6_FMT */
  59 #define SERVER_NAME_LENGTH 40
  60 #define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
  61
  62 /* used to define string lengths for reversing unicode strings */
  63 /*         (256+1)*2 = 514                                     */
  64 /*           (max path length + 1 for null) * 2 for unicode    */
  65 #define MAX_NAME 514
  66
  67 #include "cifspdu.h"
  68
  69 #ifndef XATTR_DOS_ATTRIB
  70 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  71 #endif
  72
  73 /*
  74  * CIFS vfs client Status information (based on what we know.)
  75  */
  76
  77  /* associated with each tcp and smb session */
  78 enum statusEnum {
  79         CifsNew = 0,
  80         CifsGood,
  81         CifsExiting,
  82         CifsNeedReconnect
  83 };
  84
  85 enum securityEnum {
  86         LANMAN = 0,                     /* Legacy LANMAN auth */
  87         NTLM,                   /* Legacy NTLM012 auth with NTLM hash */
  88         NTLMv2,                 /* Legacy NTLM auth with NTLMv2 hash */
  89         RawNTLMSSP,             /* NTLMSSP without SPNEGO, NTLMv2 hash */
  90 /*      NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
  91         Kerberos,               /* Kerberos via SPNEGO */
  92 };
  93
  94 enum protocolEnum {
  95         TCP = 0,
  96         SCTP
  97         /* Netbios frames protocol not supported at this time */
  98 };
  99
 100 struct mac_key {
 101         unsigned int len;
 102         union {
 103                 char ntlm[CIFS_SESS_KEY_SIZE + 16];
 104                 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
 105                 struct {
 106                         char key[16];
 107                         struct ntlmv2_resp resp;
 108                 } ntlmv2;
 109         } data;
 110 };
 111
 112 struct cifs_cred {
 113         int uid;
 114         int gid;
 115         int mode;
 116         int cecount;
 117         struct cifs_sid osid;
 118         struct cifs_sid gsid;
 119         struct cifs_ntace *ntaces;
 120         struct cifs_ace *aces;
 121 };
 122
 123 /*
 124  *****************************************************************
 125  * Except the CIFS PDUs themselves all the
 126  * globally interesting structs should go here
 127  *****************************************************************
 128  */
 129
 130 struct TCP_Server_Info {
 131         struct list_head tcp_ses_list;
 132         struct list_head smb_ses_list;
 133         int srv_count; /* reference counter */
 134         /* 15 character server name + 0x20 16th byte indicating type = srv */
 135         char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 136         char *hostname; /* hostname portion of UNC string */
 137         struct socket *ssocket;
 138         union {
 139                 struct sockaddr_in sockAddr;
 140                 struct sockaddr_in6 sockAddr6;
 141         } addr;
 142         wait_queue_head_t response_q;
 143         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 144         struct list_head pending_mid_q;
 145         void *Server_NlsInfo;   /* BB - placeholder for future NLS info  */
 146         unsigned short server_codepage; /* codepage for the server    */
 147         enum protocolEnum protocolType;
 148         char versionMajor;
 149         char versionMinor;
 150         bool svlocal:1;                 /* local server or remote */
 151         bool noblocksnd;                /* use blocking sendmsg */
 152         bool noautotune;                /* do not autotune send buf sizes */
 153         bool tcp_nodelay;
 154         atomic_t inFlight;  /* number of requests on the wire to server */
 155 #ifdef CONFIG_CIFS_STATS2
 156         atomic_t inSend; /* requests trying to send */
 157         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 158 #endif
 159         enum statusEnum tcpStatus; /* what we think the status is */
 160         struct mutex srv_mutex;
 161         struct task_struct *tsk;
 162         char server_GUID[16];
 163         char secMode;
 164         enum securityEnum secType;
 165         unsigned int maxReq;    /* Clients should submit no more */
 166         /* than maxReq distinct unanswered SMBs to the server when using  */
 167         /* multiplexed reads or writes */
 168         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 169         /* message size the server can send or receive for non-raw SMBs */
 170         unsigned int max_rw;    /* maxRw specifies the maximum */
 171         /* message size the server can send or receive for */
 172         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 173         unsigned int max_vcs;   /* maximum number of smb sessions, at least
 174                                    those that can be specified uniquely with
 175                                    vcnumbers */
 176         char sessid[4];         /* unique token id for this session */
 177         /* (returned on Negotiate */
 178         int capabilities; /* allow selective disabling of caps by smb sess */
 179         int timeAdj;  /* Adjust for difference in server time zone in sec */
 180         __u16 CurrentMid;         /* multiplex id - rotating counter */
 181         char cryptKey[CIFS_CRYPTO_KEY_SIZE];
 182         /* 16th byte of RFC1001 workstation name is always null */
 183         char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 184         __u32 sequence_number; /* needed for CIFS PDU signature */
 185         struct mac_key mac_signing_key;
 186         char ntlmv2_hash[16];
 187         unsigned long lstrp; /* when we got last response from this server */
 188         u16 dialect; /* dialect index that server chose */
 189         /* extended security flavors that server supports */
 190         bool    sec_kerberos;           /* supports plain Kerberos */
 191         bool    sec_mskerberos;         /* supports legacy MS Kerberos */
 192         bool    sec_kerberosu2u;        /* supports U2U Kerberos */
 193         bool    sec_ntlmssp;            /* supports NTLMSSP */
 194 #ifdef CONFIG_CIFS_FSCACHE
 195         struct fscache_cookie   *fscache; /* client index cache cookie */
 196 #endif
 197 };
 198
 199 /*
 200  * The following is our shortcut to user information.  We surface the uid,
 201  * and name. We always get the password on the fly in case it
 202  * has changed. We also hang a list of sessions owned by this user off here.
 203  */
 204 struct cifsUidInfo {
 205         struct list_head userList;
 206         struct list_head sessionList; /* SMB sessions for this user */
 207         uid_t linux_uid;
 208         char user[MAX_USERNAME_SIZE + 1];       /* ascii name of user */
 209         /* BB may need ptr or callback for PAM or WinBind info */
 210 };
 211
 212 /*
 213  * Session structure.  One of these for each uid session with a particular host
 214  */
 215 struct cifsSesInfo {
 216         struct list_head smb_ses_list;
 217         struct list_head tcon_list;
 218         struct mutex session_mutex;
 219 #if 0
 220         struct cifsUidInfo *uidInfo;    /* pointer to user info */
 221 #endif
 222         struct TCP_Server_Info *server; /* pointer to server info */
 223         int ses_count;          /* reference counter */
 224         enum statusEnum status;
 225         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 226         __u16 ipc_tid;          /* special tid for connection to IPC share */
 227         __u16 flags;
 228         __u16 vcnum;
 229         char *serverOS;         /* name of operating system underlying server */
 230         char *serverNOS;        /* name of network operating system of server */
 231         char *serverDomain;     /* security realm of server */
 232         int Suid;               /* remote smb uid  */
 233         uid_t linux_uid;        /* local Linux uid */
 234         int capabilities;
 235         char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
 236                                 TCP names - will ipv6 and sctp addresses fit? */
 237         char userName[MAX_USERNAME_SIZE + 1];
 238         char *domainName;
 239         char *password;
 240         bool need_reconnect:1; /* connection reset, uid now invalid */
 241 };
 242 /* no more than one of the following three session flags may be set */
 243 #define CIFS_SES_NT4 1
 244 #define CIFS_SES_OS2 2
 245 #define CIFS_SES_W9X 4
 246 /* following flag is set for old servers such as OS2 (and Win95?)
 247    which do not negotiate NTLM or POSIX dialects, but instead
 248    negotiate one of the older LANMAN dialects */
 249 #define CIFS_SES_LANMAN 8
 250 /*
 251  * there is one of these for each connection to a resource on a particular
 252  * session
 253  */
 254 struct cifsTconInfo {
 255         struct list_head tcon_list;
 256         int tc_count;
 257         struct list_head openFileList;
 258         struct cifsSesInfo *ses;        /* pointer to session associated with */
 259         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 260         char *nativeFileSystem;
 261         char *password;         /* for share-level security */
 262         __u16 tid;              /* The 2 byte tree id */
 263         __u16 Flags;            /* optional support bits */
 264         enum statusEnum tidStatus;
 265 #ifdef CONFIG_CIFS_STATS
 266         atomic_t num_smbs_sent;
 267         atomic_t num_writes;
 268         atomic_t num_reads;
 269         atomic_t num_flushes;
 270         atomic_t num_oplock_brks;
 271         atomic_t num_opens;
 272         atomic_t num_closes;
 273         atomic_t num_deletes;
 274         atomic_t num_mkdirs;
 275         atomic_t num_posixopens;
 276         atomic_t num_posixmkdirs;
 277         atomic_t num_rmdirs;
 278         atomic_t num_renames;
 279         atomic_t num_t2renames;
 280         atomic_t num_ffirst;
 281         atomic_t num_fnext;
 282         atomic_t num_fclose;
 283         atomic_t num_hardlinks;
 284         atomic_t num_symlinks;
 285         atomic_t num_locks;
 286         atomic_t num_acl_get;
 287         atomic_t num_acl_set;
 288 #ifdef CONFIG_CIFS_STATS2
 289         unsigned long long time_writes;
 290         unsigned long long time_reads;
 291         unsigned long long time_opens;
 292         unsigned long long time_deletes;
 293         unsigned long long time_closes;
 294         unsigned long long time_mkdirs;
 295         unsigned long long time_rmdirs;
 296         unsigned long long time_renames;
 297         unsigned long long time_t2renames;
 298         unsigned long long time_ffirst;
 299         unsigned long long time_fnext;
 300         unsigned long long time_fclose;
 301 #endif /* CONFIG_CIFS_STATS2 */
 302         __u64    bytes_read;
 303         __u64    bytes_written;
 304         spinlock_t stat_lock;
 305 #endif /* CONFIG_CIFS_STATS */
 306         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 307         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 308         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 309         bool ipc:1;             /* set if connection to IPC$ eg for RPC/PIPES */
 310         bool retry:1;
 311         bool nocase:1;
 312         bool seal:1;      /* transport encryption for this mounted share */
 313         bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 314                                 for this mount even if server would support */
 315         bool local_lease:1; /* check leases (only) on local system not remote */
 316         bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 317         bool need_reconnect:1; /* connection reset, tid now invalid */
 318         /* BB add field for back pointer to sb struct(s)? */
 319 };
 320
 321 /*
 322  * This info hangs off the cifsFileInfo structure, pointed to by llist.
 323  * This is used to track byte stream locks on the file
 324  */
 325 struct cifsLockInfo {
 326         struct list_head llist; /* pointer to next cifsLockInfo */
 327         __u64 offset;
 328         __u64 length;
 329         __u8 type;
 330 };
 331
 332 /*
 333  * One of these for each open instance of a file
 334  */
 335 struct cifs_search_info {
 336         loff_t index_of_last_entry;
 337         __u16 entries_in_buffer;
 338         __u16 info_level;
 339         __u32 resume_key;
 340         char *ntwrk_buf_start;
 341         char *srch_entries_start;
 342         char *last_entry;
 343         char *presume_name;
 344         unsigned int resume_name_len;
 345         bool endOfSearch:1;
 346         bool emptyDir:1;
 347         bool unicode:1;
 348         bool smallBuf:1; /* so we know which buf_release function to call */
 349 };
 350
 351 struct cifsFileInfo {
 352         struct list_head tlist; /* pointer to next fid owned by tcon */
 353         struct list_head flist; /* next fid (file instance) for this inode */
 354         unsigned int uid;       /* allows finding which FileInfo structure */
 355         __u32 pid;              /* process id who opened file */
 356         __u16 netfid;           /* file id from remote */
 357         /* BB add lock scope info here if needed */ ;
 358         /* lock scope id (0 if none) */
 359         struct file *pfile; /* needed for writepage */
 360         struct inode *pInode; /* needed for oplock break */
 361         struct vfsmount *mnt;
 362         struct mutex lock_mutex;
 363         struct list_head llist; /* list of byte range locks we have. */
 364         bool closePend:1;       /* file is marked to close */
 365         bool invalidHandle:1;   /* file closed via session abend */
 366         bool oplock_break_cancelled:1;
 367         atomic_t count;         /* reference count */
 368         struct mutex fh_mutex; /* prevents reopen race after dead ses*/
 369         struct cifs_search_info srch_inf;
 370         struct slow_work oplock_break; /* slow_work job for oplock breaks */
 371 };
 372
 373 /* Take a reference on the file private data */
 374 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
 375 {
 376         atomic_inc(&cifs_file->count);
 377 }
 378
 379 /* Release a reference on the file private data */
 380 static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
 381 {
 382         if (atomic_dec_and_test(&cifs_file->count)) {
 383                 iput(cifs_file->pInode);
 384                 kfree(cifs_file);
 385         }
 386 }
 387
 388 /*
 389  * One of these for each file inode
 390  */
 391
 392 struct cifsInodeInfo {
 393         struct list_head lockList;
 394         /* BB add in lists for dirty pages i.e. write caching info for oplock */
 395         struct list_head openFileList;
 396         int write_behind_rc;
 397         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
 398         unsigned long time;     /* jiffies of last update/check of inode */
 399         bool clientCanCacheRead:1;      /* read oplock */
 400         bool clientCanCacheAll:1;       /* read and writebehind oplock */
 401         bool delete_pending:1;          /* DELETE_ON_CLOSE is set */
 402         bool invalid_mapping:1;         /* pagecache is invalid */
 403         u64  server_eof;                /* current file size on server */
 404         u64  uniqueid;                  /* server inode number */
 405         struct inode vfs_inode;
 406 };
 407
 408 static inline struct cifsInodeInfo *
 409 CIFS_I(struct inode *inode)
 410 {
 411         return container_of(inode, struct cifsInodeInfo, vfs_inode);
 412 }
 413
 414 static inline struct cifs_sb_info *
 415 CIFS_SB(struct super_block *sb)
 416 {
 417         return sb->s_fs_info;
 418 }
 419
 420 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
 421 {
 422         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
 423                 return '/';
 424         else
 425                 return '\\';
 426 }
 427
 428 #ifdef CONFIG_CIFS_STATS
 429 #define cifs_stats_inc atomic_inc
 430
 431 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
 432                                             unsigned int bytes)
 433 {
 434         if (bytes) {
 435                 spin_lock(&tcon->stat_lock);
 436                 tcon->bytes_written += bytes;
 437                 spin_unlock(&tcon->stat_lock);
 438         }
 439 }
 440
 441 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
 442                                          unsigned int bytes)
 443 {
 444         spin_lock(&tcon->stat_lock);
 445         tcon->bytes_read += bytes;
 446         spin_unlock(&tcon->stat_lock);
 447 }
 448 #else
 449
 450 #define  cifs_stats_inc(field) do {} while (0)
 451 #define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
 452 #define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
 453
 454 #endif
 455
 456 /* one of these for every pending CIFS request to the server */
 457 struct mid_q_entry {
 458         struct list_head qhead; /* mids waiting on reply from this server */
 459         __u16 mid;              /* multiplex id */
 460         __u16 pid;              /* process id */
 461         __u32 sequence_number;  /* for CIFS signing */
 462         unsigned long when_alloc;  /* when mid was created */
 463 #ifdef CONFIG_CIFS_STATS2
 464         unsigned long when_sent; /* time when smb send finished */
 465         unsigned long when_received; /* when demux complete (taken off wire) */
 466 #endif
 467         struct task_struct *tsk;        /* task waiting for response */
 468         struct smb_hdr *resp_buf;       /* response buffer */
 469         int midState;   /* wish this were enum but can not pass to wait_event */
 470         __u8 command;   /* smb command code */
 471         bool largeBuf:1;        /* if valid response, is pointer to large buf */
 472         bool multiRsp:1;        /* multiple trans2 responses for one request  */
 473         bool multiEnd:1;        /* both received */
 474 };
 475
 476 struct oplock_q_entry {
 477         struct list_head qhead;
 478         struct inode *pinode;
 479         struct cifsTconInfo *tcon;
 480         __u16 netfid;
 481 };
 482
 483 /* for pending dnotify requests */
 484 struct dir_notify_req {
 485        struct list_head lhead;
 486        __le16 Pid;
 487        __le16 PidHigh;
 488        __u16 Mid;
 489        __u16 Tid;
 490        __u16 Uid;
 491        __u16 netfid;
 492        __u32 filter; /* CompletionFilter (for multishot) */
 493        int multishot;
 494        struct file *pfile;
 495 };
 496
 497 struct dfs_info3_param {
 498         int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
 499         int path_consumed;
 500         int server_type;
 501         int ref_flag;
 502         char *path_name;
 503         char *node_name;
 504 };
 505
 506 /*
 507  * common struct for holding inode info when searching for or updating an
 508  * inode with new info
 509  */
 510
 511 #define CIFS_FATTR_DFS_REFERRAL         0x1
 512 #define CIFS_FATTR_DELETE_PENDING       0x2
 513 #define CIFS_FATTR_NEED_REVAL           0x4
 514 #define CIFS_FATTR_INO_COLLISION        0x8
 515
 516 struct cifs_fattr {
 517         u32             cf_flags;
 518         u32             cf_cifsattrs;
 519         u64             cf_uniqueid;
 520         u64             cf_eof;
 521         u64             cf_bytes;
 522         uid_t           cf_uid;
 523         gid_t           cf_gid;
 524         umode_t         cf_mode;
 525         dev_t           cf_rdev;
 526         unsigned int    cf_nlink;
 527         unsigned int    cf_dtype;
 528         struct timespec cf_atime;
 529         struct timespec cf_mtime;
 530         struct timespec cf_ctime;
 531 };
 532
 533 static inline void free_dfs_info_param(struct dfs_info3_param *param)
 534 {
 535         if (param) {
 536                 kfree(param->path_name);
 537                 kfree(param->node_name);
 538                 kfree(param);
 539         }
 540 }
 541
 542 static inline void free_dfs_info_array(struct dfs_info3_param *param,
 543                                        int number_of_items)
 544 {
 545         int i;
 546         if ((number_of_items == 0) || (param == NULL))
 547                 return;
 548         for (i = 0; i < number_of_items; i++) {
 549                 kfree(param[i].path_name);
 550                 kfree(param[i].node_name);
 551         }
 552         kfree(param);
 553 }
 554
 555 #define   MID_FREE 0
 556 #define   MID_REQUEST_ALLOCATED 1
 557 #define   MID_REQUEST_SUBMITTED 2
 558 #define   MID_RESPONSE_RECEIVED 4
 559 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
 560 #define   MID_NO_RESP_NEEDED 0x10
 561
 562 /* Types of response buffer returned from SendReceive2 */
 563 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
 564 #define   CIFS_SMALL_BUFFER     1
 565 #define   CIFS_LARGE_BUFFER     2
 566 #define   CIFS_IOVEC            4    /* array of response buffers */
 567
 568 /* Type of Request to SendReceive2 */
 569 #define   CIFS_STD_OP           0    /* normal request timeout */
 570 #define   CIFS_LONG_OP          1    /* long op (up to 45 sec, oplock time) */
 571 #define   CIFS_VLONG_OP         2    /* sloow op - can take up to 180 seconds */
 572 #define   CIFS_BLOCKING_OP      4    /* operation can block */
 573 #define   CIFS_ASYNC_OP         8    /* do not wait for response */
 574 #define   CIFS_TIMEOUT_MASK 0x00F    /* only one of 5 above set in req */
 575 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
 576 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
 577 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
 578
 579 /* Security Flags: indicate type of session setup needed */
 580 #define   CIFSSEC_MAY_SIGN      0x00001
 581 #define   CIFSSEC_MAY_NTLM      0x00002
 582 #define   CIFSSEC_MAY_NTLMV2    0x00004
 583 #define   CIFSSEC_MAY_KRB5      0x00008
 584 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 585 #define   CIFSSEC_MAY_LANMAN    0x00010
 586 #define   CIFSSEC_MAY_PLNTXT    0x00020
 587 #else
 588 #define   CIFSSEC_MAY_LANMAN    0
 589 #define   CIFSSEC_MAY_PLNTXT    0
 590 #endif /* weak passwords */
 591 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
 592 #define   CIFSSEC_MAY_NTLMSSP   0x00080 /* raw ntlmssp with ntlmv2 */
 593
 594 #define   CIFSSEC_MUST_SIGN     0x01001
 595 /* note that only one of the following can be set so the
 596 result of setting MUST flags more than once will be to
 597 require use of the stronger protocol */
 598 #define   CIFSSEC_MUST_NTLM     0x02002
 599 #define   CIFSSEC_MUST_NTLMV2   0x04004
 600 #define   CIFSSEC_MUST_KRB5     0x08008
 601 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 602 #define   CIFSSEC_MUST_LANMAN   0x10010
 603 #define   CIFSSEC_MUST_PLNTXT   0x20020
 604 #ifdef CONFIG_CIFS_UPCALL
 605 #define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
 606 #else
 607 #define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
 608 #endif /* UPCALL */
 609 #else /* do not allow weak pw hash */
 610 #ifdef CONFIG_CIFS_UPCALL
 611 #define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
 612 #else
 613 #define   CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
 614 #endif /* UPCALL */
 615 #endif /* WEAK_PW_HASH */
 616 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
 617 #define   CIFSSEC_MUST_NTLMSSP  0x80080 /* raw ntlmssp with ntlmv2 */
 618
 619 #define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
 620 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
 621 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
 622 /*
 623  *****************************************************************
 624  * All constants go here
 625  *****************************************************************
 626  */
 627
 628 #define UID_HASH (16)
 629
 630 /*
 631  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
 632  * following to be declared.
 633  */
 634
 635 /****************************************************************************
 636  *  Locking notes.  All updates to global variables and lists should be
 637  *                  protected by spinlocks or semaphores.
 638  *
 639  *  Spinlocks
 640  *  ---------
 641  *  GlobalMid_Lock protects:
 642  *      list operations on pending_mid_q and oplockQ
 643  *      updates to XID counters, multiplex id  and SMB sequence numbers
 644  *  GlobalSMBSesLock protects:
 645  *      list operations on tcp and SMB session lists and tCon lists
 646  *  f_owner.lock protects certain per file struct operations
 647  *  mapping->page_lock protects certain per page operations
 648  *
 649  *  Semaphores
 650  *  ----------
 651  *  sesSem     operations on smb session
 652  *  tconSem    operations on tree connection
 653  *  fh_sem      file handle reconnection operations
 654  *
 655  ****************************************************************************/
 656
 657 #ifdef DECLARE_GLOBALS_HERE
 658 #define GLOBAL_EXTERN
 659 #else
 660 #define GLOBAL_EXTERN extern
 661 #endif
 662
 663 /*
 664  * the list of TCP_Server_Info structures, ie each of the sockets
 665  * connecting our client to a distinct server (ip address), is
 666  * chained together by cifs_tcp_ses_list. The list of all our SMB
 667  * sessions (and from that the tree connections) can be found
 668  * by iterating over cifs_tcp_ses_list
 669  */
 670 GLOBAL_EXTERN struct list_head          cifs_tcp_ses_list;
 671
 672 /*
 673  * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
 674  * tcp session, and the list of tcon's per smb session. It also protects
 675  * the reference counters for the server, smb session, and tcon. Finally,
 676  * changes to the tcon->tidStatus should be done while holding this lock.
 677  */
 678 GLOBAL_EXTERN rwlock_t          cifs_tcp_ses_lock;
 679
 680 /*
 681  * This lock protects the cifs_file->llist and cifs_file->flist
 682  * list operations, and updates to some flags (cifs_file->invalidHandle)
 683  * It will be moved to either use the tcon->stat_lock or equivalent later.
 684  * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
 685  * the cifs_tcp_ses_lock must be grabbed first and released last.
 686  */
 687 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
 688
 689 /* Outstanding dir notify requests */
 690 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
 691 /* DirNotify response queue */
 692 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
 693
 694 /*
 695  * Global transaction id (XID) information
 696  */
 697 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
 698 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
 699 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
 700 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
 701                                           /* on midQ entries */
 702 GLOBAL_EXTERN char Local_System_Name[15];
 703
 704 /*
 705  *  Global counters, updated atomically
 706  */
 707 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
 708 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
 709 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
 710 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
 711 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
 712
 713 /* Various Debug counters */
 714 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
 715 #ifdef CONFIG_CIFS_STATS2
 716 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
 717 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
 718 #endif
 719 GLOBAL_EXTERN atomic_t smBufAllocCount;
 720 GLOBAL_EXTERN atomic_t midCount;
 721
 722 /* Misc globals */
 723 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
 724                                 to be established on existing mount if we
 725                                 have the uid/password or Kerberos credential
 726                                 or equivalent for current user */
 727 GLOBAL_EXTERN unsigned int oplockEnabled;
 728 GLOBAL_EXTERN unsigned int experimEnabled;
 729 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
 730 GLOBAL_EXTERN unsigned int global_secflags;     /* if on, session setup sent
 731                                 with more secure ntlmssp2 challenge/resp */
 732 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
 733 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
 734 GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
 735 GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
 736 GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
 737 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
 738
 739 extern const struct slow_work_ops cifs_oplock_break_ops;
 740
 741 #endif  /* _CIFS_GLOB_H */