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