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 #include <crypto/internal/hash.h>
  29 #include <linux/scatterlist.h>
  30
  31 /*
  32  * The sizes of various internal tables and strings
  33  */
  34 #define MAX_UID_INFO 16
  35 #define MAX_SES_INFO 2
  36 #define MAX_TCON_INFO 4
  37
  38 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
  39 #define MAX_SERVER_SIZE 15
  40 #define MAX_SHARE_SIZE  64      /* used to be 20, this should still be enough */
  41 #define MAX_USERNAME_SIZE 32    /* 32 is to allow for 15 char names + null
  42                                    termination then *2 for unicode versions */
  43 #define MAX_PASSWORD_SIZE 512  /* max for windows seems to be 256 wide chars */
  44
  45 #define CIFS_MIN_RCV_POOL 4
  46
  47 /*
  48  * MAX_REQ is the maximum number of requests that WE will send
  49  * on one socket concurrently. It also matches the most common
  50  * value of max multiplex returned by servers.  We may
  51  * eventually want to use the negotiated value (in case
  52  * future servers can handle more) when we are more confident that
  53  * we will not have problems oveloading the socket with pending
  54  * write data.
  55  */
  56 #define CIFS_MAX_REQ 50
  57
  58 #define RFC1001_NAME_LEN 15
  59 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
  60
  61 /* currently length of NIP6_FMT */
  62 #define SERVER_NAME_LENGTH 40
  63 #define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
  64
  65 /* used to define string lengths for reversing unicode strings */
  66 /*         (256+1)*2 = 514                                     */
  67 /*           (max path length + 1 for null) * 2 for unicode    */
  68 #define MAX_NAME 514
  69
  70 #include "cifspdu.h"
  71
  72 #ifndef XATTR_DOS_ATTRIB
  73 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  74 #endif
  75
  76 /*
  77  * CIFS vfs client Status information (based on what we know.)
  78  */
  79
  80  /* associated with each tcp and smb session */
  81 enum statusEnum {
  82         CifsNew = 0,
  83         CifsGood,
  84         CifsExiting,
  85         CifsNeedReconnect
  86 };
  87
  88 enum securityEnum {
  89         LANMAN = 0,                     /* Legacy LANMAN auth */
  90         NTLM,                   /* Legacy NTLM012 auth with NTLM hash */
  91         NTLMv2,                 /* Legacy NTLM auth with NTLMv2 hash */
  92         RawNTLMSSP,             /* NTLMSSP without SPNEGO, NTLMv2 hash */
  93 /*      NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
  94         Kerberos,               /* Kerberos via SPNEGO */
  95 };
  96
  97 enum protocolEnum {
  98         TCP = 0,
  99         SCTP
 100         /* Netbios frames protocol not supported at this time */
 101 };
 102
 103 struct session_key {
 104         unsigned int len;
 105         union {
 106                 char ntlm[CIFS_SESS_KEY_SIZE + 16];
 107                 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
 108                 struct {
 109                         char key[16];
 110                         struct ntlmv2_resp resp;
 111                 } ntlmv2;
 112         } data;
 113 };
 114
 115 struct cifs_cred {
 116         int uid;
 117         int gid;
 118         int mode;
 119         int cecount;
 120         struct cifs_sid osid;
 121         struct cifs_sid gsid;
 122         struct cifs_ntace *ntaces;
 123         struct cifs_ace *aces;
 124 };
 125
 126 struct sdesc {
 127         struct shash_desc shash;
 128         char ctx[];
 129 };
 130
 131 struct ntlmssp_auth {
 132         __u32 client_flags;
 133         __u32 server_flags;
 134         unsigned char ciphertext[CIFS_CPHTXT_SIZE];
 135         struct crypto_shash *hmacmd5;
 136         struct crypto_shash *md5;
 137         struct sdesc *sdeschmacmd5;
 138         struct sdesc *sdescmd5;
 139 };
 140
 141 /*
 142  *****************************************************************
 143  * Except the CIFS PDUs themselves all the
 144  * globally interesting structs should go here
 145  *****************************************************************
 146  */
 147
 148 struct TCP_Server_Info {
 149         struct list_head tcp_ses_list;
 150         struct list_head smb_ses_list;
 151         int srv_count; /* reference counter */
 152         /* 15 character server name + 0x20 16th byte indicating type = srv */
 153         char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 154         char *hostname; /* hostname portion of UNC string */
 155         struct socket *ssocket;
 156         union {
 157                 struct sockaddr_in sockAddr;
 158                 struct sockaddr_in6 sockAddr6;
 159         } addr;
 160         wait_queue_head_t response_q;
 161         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 162         struct list_head pending_mid_q;
 163         void *Server_NlsInfo;   /* BB - placeholder for future NLS info  */
 164         unsigned short server_codepage; /* codepage for the server    */
 165         enum protocolEnum protocolType;
 166         char versionMajor;
 167         char versionMinor;
 168         bool svlocal:1;                 /* local server or remote */
 169         bool noblocksnd;                /* use blocking sendmsg */
 170         bool noautotune;                /* do not autotune send buf sizes */
 171         bool tcp_nodelay;
 172         atomic_t inFlight;  /* number of requests on the wire to server */
 173 #ifdef CONFIG_CIFS_STATS2
 174         atomic_t inSend; /* requests trying to send */
 175         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 176 #endif
 177         enum statusEnum tcpStatus; /* what we think the status is */
 178         struct mutex srv_mutex;
 179         struct task_struct *tsk;
 180         char server_GUID[16];
 181         char secMode;
 182         enum securityEnum secType;
 183         unsigned int maxReq;    /* Clients should submit no more */
 184         /* than maxReq distinct unanswered SMBs to the server when using  */
 185         /* multiplexed reads or writes */
 186         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 187         /* message size the server can send or receive for non-raw SMBs */
 188         unsigned int max_rw;    /* maxRw specifies the maximum */
 189         /* message size the server can send or receive for */
 190         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 191         unsigned int max_vcs;   /* maximum number of smb sessions, at least
 192                                    those that can be specified uniquely with
 193                                    vcnumbers */
 194         char sessid[4];         /* unique token id for this session */
 195         /* (returned on Negotiate */
 196         int capabilities; /* allow selective disabling of caps by smb sess */
 197         int timeAdj;  /* Adjust for difference in server time zone in sec */
 198         __u16 CurrentMid;         /* multiplex id - rotating counter */
 199         char cryptKey[CIFS_CRYPTO_KEY_SIZE];
 200         /* 16th byte of RFC1001 workstation name is always null */
 201         char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 202         __u32 sequence_number; /* needed for CIFS PDU signature */
 203         struct session_key session_key;
 204         char ntlmv2_hash[16];
 205         unsigned long lstrp; /* when we got last response from this server */
 206         u16 dialect; /* dialect index that server chose */
 207         /* extended security flavors that server supports */
 208         unsigned int tilen; /* length of the target info blob */
 209         unsigned char *tiblob; /* target info blob in challenge response */
 210         struct ntlmssp_auth ntlmssp; /* various keys, ciphers, flags */
 211         bool    sec_kerberos;           /* supports plain Kerberos */
 212         bool    sec_mskerberos;         /* supports legacy MS Kerberos */
 213         bool    sec_kerberosu2u;        /* supports U2U Kerberos */
 214         bool    sec_ntlmssp;            /* supports NTLMSSP */
 215 #ifdef CONFIG_CIFS_FSCACHE
 216         struct fscache_cookie   *fscache; /* client index cache cookie */
 217 #endif
 218 };
 219
 220 /*
 221  * Session structure.  One of these for each uid session with a particular host
 222  */
 223 struct cifsSesInfo {
 224         struct list_head smb_ses_list;
 225         struct list_head tcon_list;
 226         struct mutex session_mutex;
 227         struct TCP_Server_Info *server; /* pointer to server info */
 228         int ses_count;          /* reference counter */
 229         enum statusEnum status;
 230         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 231         __u16 ipc_tid;          /* special tid for connection to IPC share */
 232         __u16 flags;
 233         __u16 vcnum;
 234         char *serverOS;         /* name of operating system underlying server */
 235         char *serverNOS;        /* name of network operating system of server */
 236         char *serverDomain;     /* security realm of server */
 237         int Suid;               /* remote smb uid  */
 238         uid_t linux_uid;        /* overriding owner of files on the mount */
 239         uid_t cred_uid;         /* owner of credentials */
 240         int capabilities;
 241         char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
 242                                 TCP names - will ipv6 and sctp addresses fit? */
 243         char userName[MAX_USERNAME_SIZE + 1];
 244         char *domainName;
 245         char *password;
 246         bool need_reconnect:1; /* connection reset, uid now invalid */
 247 };
 248 /* no more than one of the following three session flags may be set */
 249 #define CIFS_SES_NT4 1
 250 #define CIFS_SES_OS2 2
 251 #define CIFS_SES_W9X 4
 252 /* following flag is set for old servers such as OS2 (and Win95?)
 253    which do not negotiate NTLM or POSIX dialects, but instead
 254    negotiate one of the older LANMAN dialects */
 255 #define CIFS_SES_LANMAN 8
 256 /*
 257  * there is one of these for each connection to a resource on a particular
 258  * session
 259  */
 260 struct cifsTconInfo {
 261         struct list_head tcon_list;
 262         int tc_count;
 263         struct list_head openFileList;
 264         struct cifsSesInfo *ses;        /* pointer to session associated with */
 265         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 266         char *nativeFileSystem;
 267         char *password;         /* for share-level security */
 268         __u16 tid;              /* The 2 byte tree id */
 269         __u16 Flags;            /* optional support bits */
 270         enum statusEnum tidStatus;
 271 #ifdef CONFIG_CIFS_STATS
 272         atomic_t num_smbs_sent;
 273         atomic_t num_writes;
 274         atomic_t num_reads;
 275         atomic_t num_flushes;
 276         atomic_t num_oplock_brks;
 277         atomic_t num_opens;
 278         atomic_t num_closes;
 279         atomic_t num_deletes;
 280         atomic_t num_mkdirs;
 281         atomic_t num_posixopens;
 282         atomic_t num_posixmkdirs;
 283         atomic_t num_rmdirs;
 284         atomic_t num_renames;
 285         atomic_t num_t2renames;
 286         atomic_t num_ffirst;
 287         atomic_t num_fnext;
 288         atomic_t num_fclose;
 289         atomic_t num_hardlinks;
 290         atomic_t num_symlinks;
 291         atomic_t num_locks;
 292         atomic_t num_acl_get;
 293         atomic_t num_acl_set;
 294 #ifdef CONFIG_CIFS_STATS2
 295         unsigned long long time_writes;
 296         unsigned long long time_reads;
 297         unsigned long long time_opens;
 298         unsigned long long time_deletes;
 299         unsigned long long time_closes;
 300         unsigned long long time_mkdirs;
 301         unsigned long long time_rmdirs;
 302         unsigned long long time_renames;
 303         unsigned long long time_t2renames;
 304         unsigned long long time_ffirst;
 305         unsigned long long time_fnext;
 306         unsigned long long time_fclose;
 307 #endif /* CONFIG_CIFS_STATS2 */
 308         __u64    bytes_read;
 309         __u64    bytes_written;
 310         spinlock_t stat_lock;
 311 #endif /* CONFIG_CIFS_STATS */
 312         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 313         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 314         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 315         bool ipc:1;             /* set if connection to IPC$ eg for RPC/PIPES */
 316         bool retry:1;
 317         bool nocase:1;
 318         bool seal:1;      /* transport encryption for this mounted share */
 319         bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 320                                 for this mount even if server would support */
 321         bool local_lease:1; /* check leases (only) on local system not remote */
 322         bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 323         bool need_reconnect:1; /* connection reset, tid now invalid */
 324 #ifdef CONFIG_CIFS_FSCACHE
 325         u64 resource_id;                /* server resource id */
 326         struct fscache_cookie *fscache; /* cookie for share */
 327 #endif
 328         /* BB add field for back pointer to sb struct(s)? */
 329 };
 330
 331 /*
 332  * This info hangs off the cifsFileInfo structure, pointed to by llist.
 333  * This is used to track byte stream locks on the file
 334  */
 335 struct cifsLockInfo {
 336         struct list_head llist; /* pointer to next cifsLockInfo */
 337         __u64 offset;
 338         __u64 length;
 339         __u8 type;
 340 };
 341
 342 /*
 343  * One of these for each open instance of a file
 344  */
 345 struct cifs_search_info {
 346         loff_t index_of_last_entry;
 347         __u16 entries_in_buffer;
 348         __u16 info_level;
 349         __u32 resume_key;
 350         char *ntwrk_buf_start;
 351         char *srch_entries_start;
 352         char *last_entry;
 353         char *presume_name;
 354         unsigned int resume_name_len;
 355         bool endOfSearch:1;
 356         bool emptyDir:1;
 357         bool unicode:1;
 358         bool smallBuf:1; /* so we know which buf_release function to call */
 359 };
 360
 361 struct cifsFileInfo {
 362         struct list_head tlist; /* pointer to next fid owned by tcon */
 363         struct list_head flist; /* next fid (file instance) for this inode */
 364         unsigned int uid;       /* allows finding which FileInfo structure */
 365         __u32 pid;              /* process id who opened file */
 366         __u16 netfid;           /* file id from remote */
 367         /* BB add lock scope info here if needed */ ;
 368         /* lock scope id (0 if none) */
 369         struct file *pfile; /* needed for writepage */
 370         struct inode *pInode; /* needed for oplock break */
 371         struct vfsmount *mnt;
 372         struct mutex lock_mutex;
 373         struct list_head llist; /* list of byte range locks we have. */
 374         bool closePend:1;       /* file is marked to close */
 375         bool invalidHandle:1;   /* file closed via session abend */
 376         bool oplock_break_cancelled:1;
 377         atomic_t count;         /* reference count */
 378         struct mutex fh_mutex; /* prevents reopen race after dead ses*/
 379         struct cifs_search_info srch_inf;
 380         struct work_struct oplock_break; /* work for oplock breaks */
 381 };
 382
 383 /* Take a reference on the file private data */
 384 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
 385 {
 386         atomic_inc(&cifs_file->count);
 387 }
 388
 389 /* Release a reference on the file private data */
 390 static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
 391 {
 392         if (atomic_dec_and_test(&cifs_file->count)) {
 393                 iput(cifs_file->pInode);
 394                 kfree(cifs_file);
 395         }
 396 }
 397
 398 /*
 399  * One of these for each file inode
 400  */
 401
 402 struct cifsInodeInfo {
 403         struct list_head lockList;
 404         /* BB add in lists for dirty pages i.e. write caching info for oplock */
 405         struct list_head openFileList;
 406         int write_behind_rc;
 407         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
 408         unsigned long time;     /* jiffies of last update/check of inode */
 409         bool clientCanCacheRead:1;      /* read oplock */
 410         bool clientCanCacheAll:1;       /* read and writebehind oplock */
 411         bool delete_pending:1;          /* DELETE_ON_CLOSE is set */
 412         bool invalid_mapping:1;         /* pagecache is invalid */
 413         u64  server_eof;                /* current file size on server */
 414         u64  uniqueid;                  /* server inode number */
 415 #ifdef CONFIG_CIFS_FSCACHE
 416         struct fscache_cookie *fscache;
 417 #endif
 418         struct inode vfs_inode;
 419 };
 420
 421 static inline struct cifsInodeInfo *
 422 CIFS_I(struct inode *inode)
 423 {
 424         return container_of(inode, struct cifsInodeInfo, vfs_inode);
 425 }
 426
 427 static inline struct cifs_sb_info *
 428 CIFS_SB(struct super_block *sb)
 429 {
 430         return sb->s_fs_info;
 431 }
 432
 433 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
 434 {
 435         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
 436                 return '/';
 437         else
 438                 return '\\';
 439 }
 440
 441 #ifdef CONFIG_CIFS_STATS
 442 #define cifs_stats_inc atomic_inc
 443
 444 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
 445                                             unsigned int bytes)
 446 {
 447         if (bytes) {
 448                 spin_lock(&tcon->stat_lock);
 449                 tcon->bytes_written += bytes;
 450                 spin_unlock(&tcon->stat_lock);
 451         }
 452 }
 453
 454 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
 455                                          unsigned int bytes)
 456 {
 457         spin_lock(&tcon->stat_lock);
 458         tcon->bytes_read += bytes;
 459         spin_unlock(&tcon->stat_lock);
 460 }
 461 #else
 462
 463 #define  cifs_stats_inc(field) do {} while (0)
 464 #define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
 465 #define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
 466
 467 #endif
 468
 469 /* one of these for every pending CIFS request to the server */
 470 struct mid_q_entry {
 471         struct list_head qhead; /* mids waiting on reply from this server */
 472         __u16 mid;              /* multiplex id */
 473         __u16 pid;              /* process id */
 474         __u32 sequence_number;  /* for CIFS signing */
 475         unsigned long when_alloc;  /* when mid was created */
 476 #ifdef CONFIG_CIFS_STATS2
 477         unsigned long when_sent; /* time when smb send finished */
 478         unsigned long when_received; /* when demux complete (taken off wire) */
 479 #endif
 480         struct task_struct *tsk;        /* task waiting for response */
 481         struct smb_hdr *resp_buf;       /* response buffer */
 482         int midState;   /* wish this were enum but can not pass to wait_event */
 483         __u8 command;   /* smb command code */
 484         bool largeBuf:1;        /* if valid response, is pointer to large buf */
 485         bool multiRsp:1;        /* multiple trans2 responses for one request  */
 486         bool multiEnd:1;        /* both received */
 487 };
 488
 489 struct oplock_q_entry {
 490         struct list_head qhead;
 491         struct inode *pinode;
 492         struct cifsTconInfo *tcon;
 493         __u16 netfid;
 494 };
 495
 496 /* for pending dnotify requests */
 497 struct dir_notify_req {
 498        struct list_head lhead;
 499        __le16 Pid;
 500        __le16 PidHigh;
 501        __u16 Mid;
 502        __u16 Tid;
 503        __u16 Uid;
 504        __u16 netfid;
 505        __u32 filter; /* CompletionFilter (for multishot) */
 506        int multishot;
 507        struct file *pfile;
 508 };
 509
 510 struct dfs_info3_param {
 511         int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
 512         int path_consumed;
 513         int server_type;
 514         int ref_flag;
 515         char *path_name;
 516         char *node_name;
 517 };
 518
 519 /*
 520  * common struct for holding inode info when searching for or updating an
 521  * inode with new info
 522  */
 523
 524 #define CIFS_FATTR_DFS_REFERRAL         0x1
 525 #define CIFS_FATTR_DELETE_PENDING       0x2
 526 #define CIFS_FATTR_NEED_REVAL           0x4
 527 #define CIFS_FATTR_INO_COLLISION        0x8
 528
 529 struct cifs_fattr {
 530         u32             cf_flags;
 531         u32             cf_cifsattrs;
 532         u64             cf_uniqueid;
 533         u64             cf_eof;
 534         u64             cf_bytes;
 535         uid_t           cf_uid;
 536         gid_t           cf_gid;
 537         umode_t         cf_mode;
 538         dev_t           cf_rdev;
 539         unsigned int    cf_nlink;
 540         unsigned int    cf_dtype;
 541         struct timespec cf_atime;
 542         struct timespec cf_mtime;
 543         struct timespec cf_ctime;
 544 };
 545
 546 static inline void free_dfs_info_param(struct dfs_info3_param *param)
 547 {
 548         if (param) {
 549                 kfree(param->path_name);
 550                 kfree(param->node_name);
 551                 kfree(param);
 552         }
 553 }
 554
 555 static inline void free_dfs_info_array(struct dfs_info3_param *param,
 556                                        int number_of_items)
 557 {
 558         int i;
 559         if ((number_of_items == 0) || (param == NULL))
 560                 return;
 561         for (i = 0; i < number_of_items; i++) {
 562                 kfree(param[i].path_name);
 563                 kfree(param[i].node_name);
 564         }
 565         kfree(param);
 566 }
 567
 568 #define   MID_FREE 0
 569 #define   MID_REQUEST_ALLOCATED 1
 570 #define   MID_REQUEST_SUBMITTED 2
 571 #define   MID_RESPONSE_RECEIVED 4
 572 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
 573 #define   MID_NO_RESP_NEEDED 0x10
 574
 575 /* Types of response buffer returned from SendReceive2 */
 576 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
 577 #define   CIFS_SMALL_BUFFER     1
 578 #define   CIFS_LARGE_BUFFER     2
 579 #define   CIFS_IOVEC            4    /* array of response buffers */
 580
 581 /* Type of Request to SendReceive2 */
 582 #define   CIFS_STD_OP           0    /* normal request timeout */
 583 #define   CIFS_LONG_OP          1    /* long op (up to 45 sec, oplock time) */
 584 #define   CIFS_VLONG_OP         2    /* sloow op - can take up to 180 seconds */
 585 #define   CIFS_BLOCKING_OP      4    /* operation can block */
 586 #define   CIFS_ASYNC_OP         8    /* do not wait for response */
 587 #define   CIFS_TIMEOUT_MASK 0x00F    /* only one of 5 above set in req */
 588 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
 589 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
 590 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
 591
 592 /* Security Flags: indicate type of session setup needed */
 593 #define   CIFSSEC_MAY_SIGN      0x00001
 594 #define   CIFSSEC_MAY_NTLM      0x00002
 595 #define   CIFSSEC_MAY_NTLMV2    0x00004
 596 #define   CIFSSEC_MAY_KRB5      0x00008
 597 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 598 #define   CIFSSEC_MAY_LANMAN    0x00010
 599 #define   CIFSSEC_MAY_PLNTXT    0x00020
 600 #else
 601 #define   CIFSSEC_MAY_LANMAN    0
 602 #define   CIFSSEC_MAY_PLNTXT    0
 603 #endif /* weak passwords */
 604 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
 605 #define   CIFSSEC_MAY_NTLMSSP   0x00080 /* raw ntlmssp with ntlmv2 */
 606
 607 #define   CIFSSEC_MUST_SIGN     0x01001
 608 /* note that only one of the following can be set so the
 609 result of setting MUST flags more than once will be to
 610 require use of the stronger protocol */
 611 #define   CIFSSEC_MUST_NTLM     0x02002
 612 #define   CIFSSEC_MUST_NTLMV2   0x04004
 613 #define   CIFSSEC_MUST_KRB5     0x08008
 614 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 615 #define   CIFSSEC_MUST_LANMAN   0x10010
 616 #define   CIFSSEC_MUST_PLNTXT   0x20020
 617 #ifdef CONFIG_CIFS_UPCALL
 618 #define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
 619 #else
 620 #define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
 621 #endif /* UPCALL */
 622 #else /* do not allow weak pw hash */
 623 #ifdef CONFIG_CIFS_UPCALL
 624 #define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
 625 #else
 626 #define   CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
 627 #endif /* UPCALL */
 628 #endif /* WEAK_PW_HASH */
 629 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
 630 #define   CIFSSEC_MUST_NTLMSSP  0x80080 /* raw ntlmssp with ntlmv2 */
 631
 632 #define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
 633 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
 634 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
 635 /*
 636  *****************************************************************
 637  * All constants go here
 638  *****************************************************************
 639  */
 640
 641 #define UID_HASH (16)
 642
 643 /*
 644  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
 645  * following to be declared.
 646  */
 647
 648 /****************************************************************************
 649  *  Locking notes.  All updates to global variables and lists should be
 650  *                  protected by spinlocks or semaphores.
 651  *
 652  *  Spinlocks
 653  *  ---------
 654  *  GlobalMid_Lock protects:
 655  *      list operations on pending_mid_q and oplockQ
 656  *      updates to XID counters, multiplex id  and SMB sequence numbers
 657  *  GlobalSMBSesLock protects:
 658  *      list operations on tcp and SMB session lists and tCon lists
 659  *  f_owner.lock protects certain per file struct operations
 660  *  mapping->page_lock protects certain per page operations
 661  *
 662  *  Semaphores
 663  *  ----------
 664  *  sesSem     operations on smb session
 665  *  tconSem    operations on tree connection
 666  *  fh_sem      file handle reconnection operations
 667  *
 668  ****************************************************************************/
 669
 670 #ifdef DECLARE_GLOBALS_HERE
 671 #define GLOBAL_EXTERN
 672 #else
 673 #define GLOBAL_EXTERN extern
 674 #endif
 675
 676 /*
 677  * the list of TCP_Server_Info structures, ie each of the sockets
 678  * connecting our client to a distinct server (ip address), is
 679  * chained together by cifs_tcp_ses_list. The list of all our SMB
 680  * sessions (and from that the tree connections) can be found
 681  * by iterating over cifs_tcp_ses_list
 682  */
 683 GLOBAL_EXTERN struct list_head          cifs_tcp_ses_list;
 684
 685 /*
 686  * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
 687  * tcp session, and the list of tcon's per smb session. It also protects
 688  * the reference counters for the server, smb session, and tcon. Finally,
 689  * changes to the tcon->tidStatus should be done while holding this lock.
 690  */
 691 GLOBAL_EXTERN rwlock_t          cifs_tcp_ses_lock;
 692
 693 /*
 694  * This lock protects the cifs_file->llist and cifs_file->flist
 695  * list operations, and updates to some flags (cifs_file->invalidHandle)
 696  * It will be moved to either use the tcon->stat_lock or equivalent later.
 697  * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
 698  * the cifs_tcp_ses_lock must be grabbed first and released last.
 699  */
 700 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
 701
 702 /* Outstanding dir notify requests */
 703 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
 704 /* DirNotify response queue */
 705 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
 706
 707 /*
 708  * Global transaction id (XID) information
 709  */
 710 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
 711 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
 712 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
 713 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
 714                                           /* on midQ entries */
 715 GLOBAL_EXTERN char Local_System_Name[15];
 716
 717 /*
 718  *  Global counters, updated atomically
 719  */
 720 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
 721 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
 722 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
 723 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
 724 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
 725
 726 /* Various Debug counters */
 727 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
 728 #ifdef CONFIG_CIFS_STATS2
 729 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
 730 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
 731 #endif
 732 GLOBAL_EXTERN atomic_t smBufAllocCount;
 733 GLOBAL_EXTERN atomic_t midCount;
 734
 735 /* Misc globals */
 736 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
 737                                 to be established on existing mount if we
 738                                 have the uid/password or Kerberos credential
 739                                 or equivalent for current user */
 740 GLOBAL_EXTERN unsigned int oplockEnabled;
 741 GLOBAL_EXTERN unsigned int experimEnabled;
 742 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
 743 GLOBAL_EXTERN unsigned int global_secflags;     /* if on, session setup sent
 744                                 with more secure ntlmssp2 challenge/resp */
 745 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
 746 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
 747 GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
 748 GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
 749 GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
 750 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
 751
 752 void cifs_oplock_break(struct work_struct *work);
 753 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
 754 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
 755
 756 extern const struct slow_work_ops cifs_oplock_break_ops;
 757
 758 #endif  /* _CIFS_GLOB_H */