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  * default attribute cache timeout (jiffies)
  49  */
  50 #define CIFS_DEF_ACTIMEO (1 * HZ)
  51
  52 /*
  53  * max attribute cache timeout (jiffies) - 2^30
  54  */
  55 #define CIFS_MAX_ACTIMEO (1 << 30)
  56
  57 /*
  58  * MAX_REQ is the maximum number of requests that WE will send
  59  * on one socket concurrently. It also matches the most common
  60  * value of max multiplex returned by servers.  We may
  61  * eventually want to use the negotiated value (in case
  62  * future servers can handle more) when we are more confident that
  63  * we will not have problems oveloading the socket with pending
  64  * write data.
  65  */
  66 #define CIFS_MAX_REQ 50
  67
  68 #define RFC1001_NAME_LEN 15
  69 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
  70
  71 /* currently length of NIP6_FMT */
  72 #define SERVER_NAME_LENGTH 40
  73 #define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
  74
  75 /* used to define string lengths for reversing unicode strings */
  76 /*         (256+1)*2 = 514                                     */
  77 /*           (max path length + 1 for null) * 2 for unicode    */
  78 #define MAX_NAME 514
  79
  80 #include "cifspdu.h"
  81
  82 #ifndef XATTR_DOS_ATTRIB
  83 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  84 #endif
  85
  86 /*
  87  * CIFS vfs client Status information (based on what we know.)
  88  */
  89
  90 /* associated with each tcp and smb session */
  91 enum statusEnum {
  92         CifsNew = 0,
  93         CifsGood,
  94         CifsExiting,
  95         CifsNeedReconnect
  96 };
  97
  98 enum securityEnum {
  99         LANMAN = 0,                     /* Legacy LANMAN auth */
 100         NTLM,                   /* Legacy NTLM012 auth with NTLM hash */
 101         NTLMv2,                 /* Legacy NTLM auth with NTLMv2 hash */
 102         RawNTLMSSP,             /* NTLMSSP without SPNEGO, NTLMv2 hash */
 103 /*      NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
 104         Kerberos,               /* Kerberos via SPNEGO */
 105 };
 106
 107 enum protocolEnum {
 108         TCP = 0,
 109         SCTP
 110         /* Netbios frames protocol not supported at this time */
 111 };
 112
 113 struct session_key {
 114         unsigned int len;
 115         char *response;
 116 };
 117
 118 /* crypto security descriptor definition */
 119 struct sdesc {
 120         struct shash_desc shash;
 121         char ctx[];
 122 };
 123
 124 /* crypto hashing related structure/fields, not specific to a sec mech */
 125 struct cifs_secmech {
 126         struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
 127         struct crypto_shash *md5; /* md5 hash function */
 128         struct sdesc *sdeschmacmd5;  /* ctxt to generate ntlmv2 hash, CR1 */
 129         struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
 130 };
 131
 132 /* per smb session structure/fields */
 133 struct ntlmssp_auth {
 134         __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
 135         __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
 136         unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
 137         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
 138 };
 139
 140 struct cifs_cred {
 141         int uid;
 142         int gid;
 143         int mode;
 144         int cecount;
 145         struct cifs_sid osid;
 146         struct cifs_sid gsid;
 147         struct cifs_ntace *ntaces;
 148         struct cifs_ace *aces;
 149 };
 150
 151 /*
 152  *****************************************************************
 153  * Except the CIFS PDUs themselves all the
 154  * globally interesting structs should go here
 155  *****************************************************************
 156  */
 157
 158 struct TCP_Server_Info {
 159         struct list_head tcp_ses_list;
 160         struct list_head smb_ses_list;
 161         int srv_count; /* reference counter */
 162         /* 15 character server name + 0x20 16th byte indicating type = srv */
 163         char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 164         char *hostname; /* hostname portion of UNC string */
 165         struct socket *ssocket;
 166         struct sockaddr_storage dstaddr;
 167         struct sockaddr_storage srcaddr; /* locally bind to this IP */
 168         wait_queue_head_t response_q;
 169         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 170         struct list_head pending_mid_q;
 171         void *Server_NlsInfo;   /* BB - placeholder for future NLS info  */
 172         unsigned short server_codepage; /* codepage for the server    */
 173         enum protocolEnum protocolType;
 174         char versionMajor;
 175         char versionMinor;
 176         bool svlocal:1;                 /* local server or remote */
 177         bool noblocksnd;                /* use blocking sendmsg */
 178         bool noautotune;                /* do not autotune send buf sizes */
 179         bool tcp_nodelay;
 180         atomic_t inFlight;  /* number of requests on the wire to server */
 181 #ifdef CONFIG_CIFS_STATS2
 182         atomic_t inSend; /* requests trying to send */
 183         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 184 #endif
 185         enum statusEnum tcpStatus; /* what we think the status is */
 186         struct mutex srv_mutex;
 187         struct task_struct *tsk;
 188         char server_GUID[16];
 189         char secMode;
 190         enum securityEnum secType;
 191         unsigned int maxReq;    /* Clients should submit no more */
 192         /* than maxReq distinct unanswered SMBs to the server when using  */
 193         /* multiplexed reads or writes */
 194         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 195         /* message size the server can send or receive for non-raw SMBs */
 196         unsigned int max_rw;    /* maxRw specifies the maximum */
 197         /* message size the server can send or receive for */
 198         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 199         unsigned int max_vcs;   /* maximum number of smb sessions, at least
 200                                    those that can be specified uniquely with
 201                                    vcnumbers */
 202         char sessid[4];         /* unique token id for this session */
 203         /* (returned on Negotiate */
 204         int capabilities; /* allow selective disabling of caps by smb sess */
 205         int timeAdj;  /* Adjust for difference in server time zone in sec */
 206         __u16 CurrentMid;         /* multiplex id - rotating counter */
 207         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
 208         /* 16th byte of RFC1001 workstation name is always null */
 209         char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 210         __u32 sequence_number; /* for signing, protected by srv_mutex */
 211         struct session_key session_key;
 212         unsigned long lstrp; /* when we got last response from this server */
 213         u16 dialect; /* dialect index that server chose */
 214         struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
 215         /* extended security flavors that server supports */
 216         bool    sec_kerberos;           /* supports plain Kerberos */
 217         bool    sec_mskerberos;         /* supports legacy MS Kerberos */
 218         bool    sec_kerberosu2u;        /* supports U2U Kerberos */
 219         bool    sec_ntlmssp;            /* supports NTLMSSP */
 220         bool session_estab; /* mark when very first sess is established */
 221         struct delayed_work     echo; /* echo ping workqueue job */
 222 #ifdef CONFIG_CIFS_FSCACHE
 223         struct fscache_cookie   *fscache; /* client index cache cookie */
 224 #endif
 225 };
 226
 227 /*
 228  * Session structure.  One of these for each uid session with a particular host
 229  */
 230 struct cifsSesInfo {
 231         struct list_head smb_ses_list;
 232         struct list_head tcon_list;
 233         struct mutex session_mutex;
 234         struct TCP_Server_Info *server; /* pointer to server info */
 235         int ses_count;          /* reference counter */
 236         enum statusEnum status;
 237         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 238         __u16 ipc_tid;          /* special tid for connection to IPC share */
 239         __u16 flags;
 240         __u16 vcnum;
 241         char *serverOS;         /* name of operating system underlying server */
 242         char *serverNOS;        /* name of network operating system of server */
 243         char *serverDomain;     /* security realm of server */
 244         int Suid;               /* remote smb uid  */
 245         uid_t linux_uid;        /* overriding owner of files on the mount */
 246         uid_t cred_uid;         /* owner of credentials */
 247         int capabilities;
 248         char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
 249                                 TCP names - will ipv6 and sctp addresses fit? */
 250         char userName[MAX_USERNAME_SIZE + 1];
 251         char *domainName;
 252         char *password;
 253         struct session_key auth_key;
 254         struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
 255         bool need_reconnect:1; /* connection reset, uid now invalid */
 256 };
 257 /* no more than one of the following three session flags may be set */
 258 #define CIFS_SES_NT4 1
 259 #define CIFS_SES_OS2 2
 260 #define CIFS_SES_W9X 4
 261 /* following flag is set for old servers such as OS2 (and Win95?)
 262    which do not negotiate NTLM or POSIX dialects, but instead
 263    negotiate one of the older LANMAN dialects */
 264 #define CIFS_SES_LANMAN 8
 265 /*
 266  * there is one of these for each connection to a resource on a particular
 267  * session
 268  */
 269 struct cifsTconInfo {
 270         struct list_head tcon_list;
 271         int tc_count;
 272         struct list_head openFileList;
 273         struct cifsSesInfo *ses;        /* pointer to session associated with */
 274         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 275         char *nativeFileSystem;
 276         char *password;         /* for share-level security */
 277         __u16 tid;              /* The 2 byte tree id */
 278         __u16 Flags;            /* optional support bits */
 279         enum statusEnum tidStatus;
 280 #ifdef CONFIG_CIFS_STATS
 281         atomic_t num_smbs_sent;
 282         atomic_t num_writes;
 283         atomic_t num_reads;
 284         atomic_t num_flushes;
 285         atomic_t num_oplock_brks;
 286         atomic_t num_opens;
 287         atomic_t num_closes;
 288         atomic_t num_deletes;
 289         atomic_t num_mkdirs;
 290         atomic_t num_posixopens;
 291         atomic_t num_posixmkdirs;
 292         atomic_t num_rmdirs;
 293         atomic_t num_renames;
 294         atomic_t num_t2renames;
 295         atomic_t num_ffirst;
 296         atomic_t num_fnext;
 297         atomic_t num_fclose;
 298         atomic_t num_hardlinks;
 299         atomic_t num_symlinks;
 300         atomic_t num_locks;
 301         atomic_t num_acl_get;
 302         atomic_t num_acl_set;
 303 #ifdef CONFIG_CIFS_STATS2
 304         unsigned long long time_writes;
 305         unsigned long long time_reads;
 306         unsigned long long time_opens;
 307         unsigned long long time_deletes;
 308         unsigned long long time_closes;
 309         unsigned long long time_mkdirs;
 310         unsigned long long time_rmdirs;
 311         unsigned long long time_renames;
 312         unsigned long long time_t2renames;
 313         unsigned long long time_ffirst;
 314         unsigned long long time_fnext;
 315         unsigned long long time_fclose;
 316 #endif /* CONFIG_CIFS_STATS2 */
 317         __u64    bytes_read;
 318         __u64    bytes_written;
 319         spinlock_t stat_lock;
 320 #endif /* CONFIG_CIFS_STATS */
 321         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 322         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 323         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 324         bool ipc:1;             /* set if connection to IPC$ eg for RPC/PIPES */
 325         bool retry:1;
 326         bool nocase:1;
 327         bool seal:1;      /* transport encryption for this mounted share */
 328         bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 329                                 for this mount even if server would support */
 330         bool local_lease:1; /* check leases (only) on local system not remote */
 331         bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 332         bool need_reconnect:1; /* connection reset, tid now invalid */
 333 #ifdef CONFIG_CIFS_FSCACHE
 334         u64 resource_id;                /* server resource id */
 335         struct fscache_cookie *fscache; /* cookie for share */
 336 #endif
 337         /* BB add field for back pointer to sb struct(s)? */
 338 };
 339
 340 /*
 341  * This is a refcounted and timestamped container for a tcon pointer. The
 342  * container holds a tcon reference. It is considered safe to free one of
 343  * these when the tl_count goes to 0. The tl_time is the time of the last
 344  * "get" on the container.
 345  */
 346 struct tcon_link {
 347         struct rb_node          tl_rbnode;
 348         uid_t                   tl_uid;
 349         unsigned long           tl_flags;
 350 #define TCON_LINK_MASTER        0
 351 #define TCON_LINK_PENDING       1
 352 #define TCON_LINK_IN_TREE       2
 353         unsigned long           tl_time;
 354         atomic_t                tl_count;
 355         struct cifsTconInfo     *tl_tcon;
 356 };
 357
 358 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
 359
 360 static inline struct cifsTconInfo *
 361 tlink_tcon(struct tcon_link *tlink)
 362 {
 363         return tlink->tl_tcon;
 364 }
 365
 366 extern void cifs_put_tlink(struct tcon_link *tlink);
 367
 368 static inline struct tcon_link *
 369 cifs_get_tlink(struct tcon_link *tlink)
 370 {
 371         if (tlink && !IS_ERR(tlink))
 372                 atomic_inc(&tlink->tl_count);
 373         return tlink;
 374 }
 375
 376 /* This function is always expected to succeed */
 377 extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
 378
 379 /*
 380  * This info hangs off the cifsFileInfo structure, pointed to by llist.
 381  * This is used to track byte stream locks on the file
 382  */
 383 struct cifsLockInfo {
 384         struct list_head llist; /* pointer to next cifsLockInfo */
 385         __u64 offset;
 386         __u64 length;
 387         __u8 type;
 388 };
 389
 390 /*
 391  * One of these for each open instance of a file
 392  */
 393 struct cifs_search_info {
 394         loff_t index_of_last_entry;
 395         __u16 entries_in_buffer;
 396         __u16 info_level;
 397         __u32 resume_key;
 398         char *ntwrk_buf_start;
 399         char *srch_entries_start;
 400         char *last_entry;
 401         char *presume_name;
 402         unsigned int resume_name_len;
 403         bool endOfSearch:1;
 404         bool emptyDir:1;
 405         bool unicode:1;
 406         bool smallBuf:1; /* so we know which buf_release function to call */
 407 };
 408
 409 struct cifsFileInfo {
 410         struct list_head tlist; /* pointer to next fid owned by tcon */
 411         struct list_head flist; /* next fid (file instance) for this inode */
 412         unsigned int uid;       /* allows finding which FileInfo structure */
 413         __u32 pid;              /* process id who opened file */
 414         __u16 netfid;           /* file id from remote */
 415         /* BB add lock scope info here if needed */ ;
 416         /* lock scope id (0 if none) */
 417         struct dentry *dentry;
 418         unsigned int f_flags;
 419         struct tcon_link *tlink;
 420         struct mutex lock_mutex;
 421         struct list_head llist; /* list of byte range locks we have. */
 422         bool invalidHandle:1;   /* file closed via session abend */
 423         bool oplock_break_cancelled:1;
 424         int count;              /* refcount protected by cifs_file_list_lock */
 425         struct mutex fh_mutex; /* prevents reopen race after dead ses*/
 426         struct cifs_search_info srch_inf;
 427         struct work_struct oplock_break; /* work for oplock breaks */
 428 };
 429
 430 /*
 431  * Take a reference on the file private data. Must be called with
 432  * cifs_file_list_lock held.
 433  */
 434 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
 435 {
 436         ++cifs_file->count;
 437 }
 438
 439 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
 440
 441 /*
 442  * One of these for each file inode
 443  */
 444
 445 struct cifsInodeInfo {
 446         struct list_head lockList;
 447         /* BB add in lists for dirty pages i.e. write caching info for oplock */
 448         struct list_head openFileList;
 449         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
 450         unsigned long time;     /* jiffies of last update/check of inode */
 451         bool clientCanCacheRead:1;      /* read oplock */
 452         bool clientCanCacheAll:1;       /* read and writebehind oplock */
 453         bool delete_pending:1;          /* DELETE_ON_CLOSE is set */
 454         bool invalid_mapping:1;         /* pagecache is invalid */
 455         u64  server_eof;                /* current file size on server */
 456         u64  uniqueid;                  /* server inode number */
 457         u64  createtime;                /* creation time on server */
 458 #ifdef CONFIG_CIFS_FSCACHE
 459         struct fscache_cookie *fscache;
 460 #endif
 461         struct inode vfs_inode;
 462 };
 463
 464 static inline struct cifsInodeInfo *
 465 CIFS_I(struct inode *inode)
 466 {
 467         return container_of(inode, struct cifsInodeInfo, vfs_inode);
 468 }
 469
 470 static inline struct cifs_sb_info *
 471 CIFS_SB(struct super_block *sb)
 472 {
 473         return sb->s_fs_info;
 474 }
 475
 476 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
 477 {
 478         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
 479                 return '/';
 480         else
 481                 return '\\';
 482 }
 483
 484 #ifdef CONFIG_CIFS_STATS
 485 #define cifs_stats_inc atomic_inc
 486
 487 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
 488                                             unsigned int bytes)
 489 {
 490         if (bytes) {
 491                 spin_lock(&tcon->stat_lock);
 492                 tcon->bytes_written += bytes;
 493                 spin_unlock(&tcon->stat_lock);
 494         }
 495 }
 496
 497 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
 498                                          unsigned int bytes)
 499 {
 500         spin_lock(&tcon->stat_lock);
 501         tcon->bytes_read += bytes;
 502         spin_unlock(&tcon->stat_lock);
 503 }
 504 #else
 505
 506 #define  cifs_stats_inc(field) do {} while (0)
 507 #define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
 508 #define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
 509
 510 #endif
 511
 512 struct mid_q_entry;
 513
 514 /*
 515  * This is the prototype for the mid callback function. When creating one,
 516  * take special care to avoid deadlocks. Things to bear in mind:
 517  *
 518  * - it will be called by cifsd
 519  * - the GlobalMid_Lock will be held
 520  * - the mid will be removed from the pending_mid_q list
 521  */
 522 typedef void (mid_callback_t)(struct mid_q_entry *mid);
 523
 524 /* one of these for every pending CIFS request to the server */
 525 struct mid_q_entry {
 526         struct list_head qhead; /* mids waiting on reply from this server */
 527         __u16 mid;              /* multiplex id */
 528         __u16 pid;              /* process id */
 529         __u32 sequence_number;  /* for CIFS signing */
 530         unsigned long when_alloc;  /* when mid was created */
 531 #ifdef CONFIG_CIFS_STATS2
 532         unsigned long when_sent; /* time when smb send finished */
 533         unsigned long when_received; /* when demux complete (taken off wire) */
 534 #endif
 535         mid_callback_t *callback; /* call completion callback */
 536         void *callback_data;      /* general purpose pointer for callback */
 537         struct smb_hdr *resp_buf;       /* response buffer */
 538         int midState;   /* wish this were enum but can not pass to wait_event */
 539         __u8 command;   /* smb command code */
 540         bool largeBuf:1;        /* if valid response, is pointer to large buf */
 541         bool multiRsp:1;        /* multiple trans2 responses for one request  */
 542         bool multiEnd:1;        /* both received */
 543 };
 544
 545 struct oplock_q_entry {
 546         struct list_head qhead;
 547         struct inode *pinode;
 548         struct cifsTconInfo *tcon;
 549         __u16 netfid;
 550 };
 551
 552 /* for pending dnotify requests */
 553 struct dir_notify_req {
 554         struct list_head lhead;
 555         __le16 Pid;
 556         __le16 PidHigh;
 557         __u16 Mid;
 558         __u16 Tid;
 559         __u16 Uid;
 560         __u16 netfid;
 561         __u32 filter; /* CompletionFilter (for multishot) */
 562         int multishot;
 563         struct file *pfile;
 564 };
 565
 566 struct dfs_info3_param {
 567         int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
 568         int path_consumed;
 569         int server_type;
 570         int ref_flag;
 571         char *path_name;
 572         char *node_name;
 573 };
 574
 575 /*
 576  * common struct for holding inode info when searching for or updating an
 577  * inode with new info
 578  */
 579
 580 #define CIFS_FATTR_DFS_REFERRAL         0x1
 581 #define CIFS_FATTR_DELETE_PENDING       0x2
 582 #define CIFS_FATTR_NEED_REVAL           0x4
 583 #define CIFS_FATTR_INO_COLLISION        0x8
 584
 585 struct cifs_fattr {
 586         u32             cf_flags;
 587         u32             cf_cifsattrs;
 588         u64             cf_uniqueid;
 589         u64             cf_eof;
 590         u64             cf_bytes;
 591         u64             cf_createtime;
 592         uid_t           cf_uid;
 593         gid_t           cf_gid;
 594         umode_t         cf_mode;
 595         dev_t           cf_rdev;
 596         unsigned int    cf_nlink;
 597         unsigned int    cf_dtype;
 598         struct timespec cf_atime;
 599         struct timespec cf_mtime;
 600         struct timespec cf_ctime;
 601 };
 602
 603 static inline void free_dfs_info_param(struct dfs_info3_param *param)
 604 {
 605         if (param) {
 606                 kfree(param->path_name);
 607                 kfree(param->node_name);
 608                 kfree(param);
 609         }
 610 }
 611
 612 static inline void free_dfs_info_array(struct dfs_info3_param *param,
 613                                        int number_of_items)
 614 {
 615         int i;
 616         if ((number_of_items == 0) || (param == NULL))
 617                 return;
 618         for (i = 0; i < number_of_items; i++) {
 619                 kfree(param[i].path_name);
 620                 kfree(param[i].node_name);
 621         }
 622         kfree(param);
 623 }
 624
 625 #define   MID_FREE 0
 626 #define   MID_REQUEST_ALLOCATED 1
 627 #define   MID_REQUEST_SUBMITTED 2
 628 #define   MID_RESPONSE_RECEIVED 4
 629 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
 630 #define   MID_NO_RESP_NEEDED 0x10
 631
 632 /* Types of response buffer returned from SendReceive2 */
 633 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
 634 #define   CIFS_SMALL_BUFFER     1
 635 #define   CIFS_LARGE_BUFFER     2
 636 #define   CIFS_IOVEC            4    /* array of response buffers */
 637
 638 /* Type of Request to SendReceive2 */
 639 #define   CIFS_STD_OP           0    /* normal request timeout */
 640 #define   CIFS_LONG_OP          1    /* long op (up to 45 sec, oplock time) */
 641 #define   CIFS_VLONG_OP         2    /* sloow op - can take up to 180 seconds */
 642 #define   CIFS_BLOCKING_OP      4    /* operation can block */
 643 #define   CIFS_ASYNC_OP         8    /* do not wait for response */
 644 #define   CIFS_TIMEOUT_MASK 0x00F    /* only one of 5 above set in req */
 645 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
 646 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
 647 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
 648
 649 /* Security Flags: indicate type of session setup needed */
 650 #define   CIFSSEC_MAY_SIGN      0x00001
 651 #define   CIFSSEC_MAY_NTLM      0x00002
 652 #define   CIFSSEC_MAY_NTLMV2    0x00004
 653 #define   CIFSSEC_MAY_KRB5      0x00008
 654 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 655 #define   CIFSSEC_MAY_LANMAN    0x00010
 656 #define   CIFSSEC_MAY_PLNTXT    0x00020
 657 #else
 658 #define   CIFSSEC_MAY_LANMAN    0
 659 #define   CIFSSEC_MAY_PLNTXT    0
 660 #endif /* weak passwords */
 661 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
 662 #define   CIFSSEC_MAY_NTLMSSP   0x00080 /* raw ntlmssp with ntlmv2 */
 663
 664 #define   CIFSSEC_MUST_SIGN     0x01001
 665 /* note that only one of the following can be set so the
 666 result of setting MUST flags more than once will be to
 667 require use of the stronger protocol */
 668 #define   CIFSSEC_MUST_NTLM     0x02002
 669 #define   CIFSSEC_MUST_NTLMV2   0x04004
 670 #define   CIFSSEC_MUST_KRB5     0x08008
 671 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 672 #define   CIFSSEC_MUST_LANMAN   0x10010
 673 #define   CIFSSEC_MUST_PLNTXT   0x20020
 674 #ifdef CONFIG_CIFS_UPCALL
 675 #define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
 676 #else
 677 #define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
 678 #endif /* UPCALL */
 679 #else /* do not allow weak pw hash */
 680 #ifdef CONFIG_CIFS_UPCALL
 681 #define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
 682 #else
 683 #define   CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
 684 #endif /* UPCALL */
 685 #endif /* WEAK_PW_HASH */
 686 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
 687 #define   CIFSSEC_MUST_NTLMSSP  0x80080 /* raw ntlmssp with ntlmv2 */
 688
 689 #define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
 690 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
 691 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
 692 /*
 693  *****************************************************************
 694  * All constants go here
 695  *****************************************************************
 696  */
 697
 698 #define UID_HASH (16)
 699
 700 /*
 701  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
 702  * following to be declared.
 703  */
 704
 705 /****************************************************************************
 706  *  Locking notes.  All updates to global variables and lists should be
 707  *                  protected by spinlocks or semaphores.
 708  *
 709  *  Spinlocks
 710  *  ---------
 711  *  GlobalMid_Lock protects:
 712  *      list operations on pending_mid_q and oplockQ
 713  *      updates to XID counters, multiplex id  and SMB sequence numbers
 714  *  cifs_file_list_lock protects:
 715  *      list operations on tcp and SMB session lists and tCon lists
 716  *  f_owner.lock protects certain per file struct operations
 717  *  mapping->page_lock protects certain per page operations
 718  *
 719  *  Semaphores
 720  *  ----------
 721  *  sesSem     operations on smb session
 722  *  tconSem    operations on tree connection
 723  *  fh_sem      file handle reconnection operations
 724  *
 725  ****************************************************************************/
 726
 727 #ifdef DECLARE_GLOBALS_HERE
 728 #define GLOBAL_EXTERN
 729 #else
 730 #define GLOBAL_EXTERN extern
 731 #endif
 732
 733 /*
 734  * the list of TCP_Server_Info structures, ie each of the sockets
 735  * connecting our client to a distinct server (ip address), is
 736  * chained together by cifs_tcp_ses_list. The list of all our SMB
 737  * sessions (and from that the tree connections) can be found
 738  * by iterating over cifs_tcp_ses_list
 739  */
 740 GLOBAL_EXTERN struct list_head          cifs_tcp_ses_list;
 741
 742 /*
 743  * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
 744  * tcp session, and the list of tcon's per smb session. It also protects
 745  * the reference counters for the server, smb session, and tcon. Finally,
 746  * changes to the tcon->tidStatus should be done while holding this lock.
 747  */
 748 GLOBAL_EXTERN spinlock_t                cifs_tcp_ses_lock;
 749
 750 /*
 751  * This lock protects the cifs_file->llist and cifs_file->flist
 752  * list operations, and updates to some flags (cifs_file->invalidHandle)
 753  * It will be moved to either use the tcon->stat_lock or equivalent later.
 754  * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
 755  * the cifs_tcp_ses_lock must be grabbed first and released last.
 756  */
 757 GLOBAL_EXTERN spinlock_t        cifs_file_list_lock;
 758
 759 /* Outstanding dir notify requests */
 760 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
 761 /* DirNotify response queue */
 762 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
 763
 764 /*
 765  * Global transaction id (XID) information
 766  */
 767 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
 768 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
 769 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
 770 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
 771                                           /* on midQ entries */
 772 /*
 773  *  Global counters, updated atomically
 774  */
 775 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
 776 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
 777 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
 778 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
 779 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
 780
 781 /* Various Debug counters */
 782 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
 783 #ifdef CONFIG_CIFS_STATS2
 784 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
 785 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
 786 #endif
 787 GLOBAL_EXTERN atomic_t smBufAllocCount;
 788 GLOBAL_EXTERN atomic_t midCount;
 789
 790 /* Misc globals */
 791 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
 792                                 to be established on existing mount if we
 793                                 have the uid/password or Kerberos credential
 794                                 or equivalent for current user */
 795 GLOBAL_EXTERN unsigned int oplockEnabled;
 796 GLOBAL_EXTERN unsigned int experimEnabled;
 797 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
 798 GLOBAL_EXTERN unsigned int global_secflags;     /* if on, session setup sent
 799                                 with more secure ntlmssp2 challenge/resp */
 800 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
 801 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
 802 GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
 803 GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
 804 GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
 805 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
 806
 807 void cifs_oplock_break(struct work_struct *work);
 808 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
 809 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
 810
 811 extern const struct slow_work_ops cifs_oplock_break_ops;
 812
 813 #endif  /* _CIFS_GLOB_H */