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