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/mempool.h>
  26 #include <linux/workqueue.h>
  27 #include "cifs_fs_sb.h"
  28 #include "cifsacl.h"
  29 #include <crypto/internal/hash.h>
  30 #include <linux/scatterlist.h>
  31 #include <uapi/linux/cifs/cifs_mount.h>
  32 #ifdef CONFIG_CIFS_SMB2
  33 #include "smb2pdu.h"
  34 #endif
  35
  36 #define CIFS_MAGIC_NUMBER 0xFF534D42      /* the first four bytes of SMB PDUs */
  37
  38 /*
  39  * The sizes of various internal tables and strings
  40  */
  41 #define MAX_UID_INFO 16
  42 #define MAX_SES_INFO 2
  43 #define MAX_TCON_INFO 4
  44
  45 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
  46
  47 #define CIFS_MIN_RCV_POOL 4
  48
  49 #define MAX_REOPEN_ATT  5 /* these many maximum attempts to reopen a file */
  50 /*
  51  * default attribute cache timeout (jiffies)
  52  */
  53 #define CIFS_DEF_ACTIMEO (1 * HZ)
  54
  55 /*
  56  * max attribute cache timeout (jiffies) - 2^30
  57  */
  58 #define CIFS_MAX_ACTIMEO (1 << 30)
  59
  60 /*
  61  * MAX_REQ is the maximum number of requests that WE will send
  62  * on one socket concurrently.
  63  */
  64 #define CIFS_MAX_REQ 32767
  65
  66 #define RFC1001_NAME_LEN 15
  67 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
  68
  69 /* currently length of NIP6_FMT */
  70 #define SERVER_NAME_LENGTH 40
  71 #define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
  72
  73 /* SMB echo "timeout" -- FIXME: tunable? */
  74 #define SMB_ECHO_INTERVAL (60 * HZ)
  75
  76 #include "cifspdu.h"
  77
  78 #ifndef XATTR_DOS_ATTRIB
  79 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  80 #endif
  81
  82 /*
  83  * CIFS vfs client Status information (based on what we know.)
  84  */
  85
  86 /* associated with each tcp and smb session */
  87 enum statusEnum {
  88         CifsNew = 0,
  89         CifsGood,
  90         CifsExiting,
  91         CifsNeedReconnect,
  92         CifsNeedNegotiate
  93 };
  94
  95 enum securityEnum {
  96         Unspecified = 0,        /* not specified */
  97         LANMAN,                 /* Legacy LANMAN auth */
  98         NTLM,                   /* Legacy NTLM012 auth with NTLM hash */
  99         NTLMv2,                 /* Legacy NTLM auth with NTLMv2 hash */
 100         RawNTLMSSP,             /* NTLMSSP without SPNEGO, NTLMv2 hash */
 101         Kerberos,               /* Kerberos via SPNEGO */
 102 };
 103
 104 struct session_key {
 105         unsigned int len;
 106         char *response;
 107 };
 108
 109 /* crypto security descriptor definition */
 110 struct sdesc {
 111         struct shash_desc shash;
 112         char ctx[];
 113 };
 114
 115 /* crypto hashing related structure/fields, not specific to a sec mech */
 116 struct cifs_secmech {
 117         struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
 118         struct crypto_shash *md5; /* md5 hash function */
 119         struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
 120         struct crypto_shash *cmacaes; /* block-cipher based MAC function */
 121         struct sdesc *sdeschmacmd5;  /* ctxt to generate ntlmv2 hash, CR1 */
 122         struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
 123         struct sdesc *sdeschmacsha256;  /* ctxt to generate smb2 signature */
 124         struct sdesc *sdesccmacaes;  /* ctxt to generate smb3 signature */
 125 };
 126
 127 /* per smb session structure/fields */
 128 struct ntlmssp_auth {
 129         bool sesskey_per_smbsess; /* whether session key is per smb session */
 130         __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
 131         __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
 132         unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
 133         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
 134 };
 135
 136 struct cifs_cred {
 137         int uid;
 138         int gid;
 139         int mode;
 140         int cecount;
 141         struct cifs_sid osid;
 142         struct cifs_sid gsid;
 143         struct cifs_ntace *ntaces;
 144         struct cifs_ace *aces;
 145 };
 146
 147 /*
 148  *****************************************************************
 149  * Except the CIFS PDUs themselves all the
 150  * globally interesting structs should go here
 151  *****************************************************************
 152  */
 153
 154 /*
 155  * A smb_rqst represents a complete request to be issued to a server. It's
 156  * formed by a kvec array, followed by an array of pages. Page data is assumed
 157  * to start at the beginning of the first page.
 158  */
 159 struct smb_rqst {
 160         struct kvec     *rq_iov;        /* array of kvecs */
 161         unsigned int    rq_nvec;        /* number of kvecs in array */
 162         struct page     **rq_pages;     /* pointer to array of page ptrs */
 163         unsigned int    rq_npages;      /* number pages in array */
 164         unsigned int    rq_pagesz;      /* page size to use */
 165         unsigned int    rq_tailsz;      /* length of last page */
 166 };
 167
 168 enum smb_version {
 169         Smb_1 = 1,
 170         Smb_20,
 171         Smb_21,
 172         Smb_30,
 173         Smb_302,
 174 #ifdef CONFIG_CIFS_SMB311
 175         Smb_311,
 176 #endif /* SMB311 */
 177         Smb_version_err
 178 };
 179
 180 struct mid_q_entry;
 181 struct TCP_Server_Info;
 182 struct cifsFileInfo;
 183 struct cifs_ses;
 184 struct cifs_tcon;
 185 struct dfs_info3_param;
 186 struct cifs_fattr;
 187 struct smb_vol;
 188 struct cifs_fid;
 189 struct cifs_readdata;
 190 struct cifs_writedata;
 191 struct cifs_io_parms;
 192 struct cifs_search_info;
 193 struct cifsInodeInfo;
 194 struct cifs_open_parms;
 195
 196 struct smb_version_operations {
 197         int (*send_cancel)(struct TCP_Server_Info *, void *,
 198                            struct mid_q_entry *);
 199         bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
 200         /* setup request: allocate mid, sign message */
 201         struct mid_q_entry *(*setup_request)(struct cifs_ses *,
 202                                                 struct smb_rqst *);
 203         /* setup async request: allocate mid, sign message */
 204         struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
 205                                                 struct smb_rqst *);
 206         /* check response: verify signature, map error */
 207         int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
 208                              bool);
 209         void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
 210                             const int);
 211         void (*set_credits)(struct TCP_Server_Info *, const int);
 212         int * (*get_credits_field)(struct TCP_Server_Info *, const int);
 213         unsigned int (*get_credits)(struct mid_q_entry *);
 214         __u64 (*get_next_mid)(struct TCP_Server_Info *);
 215         /* data offset from read response message */
 216         unsigned int (*read_data_offset)(char *);
 217         /* data length from read response message */
 218         unsigned int (*read_data_length)(char *);
 219         /* map smb to linux error */
 220         int (*map_error)(char *, bool);
 221         /* find mid corresponding to the response message */
 222         struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
 223         void (*dump_detail)(void *);
 224         void (*clear_stats)(struct cifs_tcon *);
 225         void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
 226         void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
 227         /* verify the message */
 228         int (*check_message)(char *, unsigned int);
 229         bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
 230         void (*downgrade_oplock)(struct TCP_Server_Info *,
 231                                         struct cifsInodeInfo *, bool);
 232         /* process transaction2 response */
 233         bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
 234                              char *, int);
 235         /* check if we need to negotiate */
 236         bool (*need_neg)(struct TCP_Server_Info *);
 237         /* negotiate to the server */
 238         int (*negotiate)(const unsigned int, struct cifs_ses *);
 239         /* set negotiated write size */
 240         unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
 241         /* set negotiated read size */
 242         unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
 243         /* setup smb sessionn */
 244         int (*sess_setup)(const unsigned int, struct cifs_ses *,
 245                           const struct nls_table *);
 246         /* close smb session */
 247         int (*logoff)(const unsigned int, struct cifs_ses *);
 248         /* connect to a server share */
 249         int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
 250                             struct cifs_tcon *, const struct nls_table *);
 251         /* close tree connecion */
 252         int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
 253         /* get DFS referrals */
 254         int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
 255                              const char *, struct dfs_info3_param **,
 256                              unsigned int *, const struct nls_table *, int);
 257         /* informational QFS call */
 258         void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
 259         /* check if a path is accessible or not */
 260         int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
 261                                   struct cifs_sb_info *, const char *);
 262         /* query path data from the server */
 263         int (*query_path_info)(const unsigned int, struct cifs_tcon *,
 264                                struct cifs_sb_info *, const char *,
 265                                FILE_ALL_INFO *, bool *, bool *);
 266         /* query file data from the server */
 267         int (*query_file_info)(const unsigned int, struct cifs_tcon *,
 268                                struct cifs_fid *, FILE_ALL_INFO *);
 269         /* get server index number */
 270         int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
 271                             struct cifs_sb_info *, const char *,
 272                             u64 *uniqueid, FILE_ALL_INFO *);
 273         /* set size by path */
 274         int (*set_path_size)(const unsigned int, struct cifs_tcon *,
 275                              const char *, __u64, struct cifs_sb_info *, bool);
 276         /* set size by file handle */
 277         int (*set_file_size)(const unsigned int, struct cifs_tcon *,
 278                              struct cifsFileInfo *, __u64, bool);
 279         /* set attributes */
 280         int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
 281                              const unsigned int);
 282         int (*set_compression)(const unsigned int, struct cifs_tcon *,
 283                                struct cifsFileInfo *);
 284         /* check if we can send an echo or nor */
 285         bool (*can_echo)(struct TCP_Server_Info *);
 286         /* send echo request */
 287         int (*echo)(struct TCP_Server_Info *);
 288         /* create directory */
 289         int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
 290                      struct cifs_sb_info *);
 291         /* set info on created directory */
 292         void (*mkdir_setinfo)(struct inode *, const char *,
 293                               struct cifs_sb_info *, struct cifs_tcon *,
 294                               const unsigned int);
 295         /* remove directory */
 296         int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
 297                      struct cifs_sb_info *);
 298         /* unlink file */
 299         int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
 300                       struct cifs_sb_info *);
 301         /* open, rename and delete file */
 302         int (*rename_pending_delete)(const char *, struct dentry *,
 303                                      const unsigned int);
 304         /* send rename request */
 305         int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
 306                       const char *, struct cifs_sb_info *);
 307         /* send create hardlink request */
 308         int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
 309                                const char *, const char *,
 310                                struct cifs_sb_info *);
 311         /* query symlink target */
 312         int (*query_symlink)(const unsigned int, struct cifs_tcon *,
 313                              const char *, char **, struct cifs_sb_info *);
 314         /* open a file for non-posix mounts */
 315         int (*open)(const unsigned int, struct cifs_open_parms *,
 316                     __u32 *, FILE_ALL_INFO *);
 317         /* set fid protocol-specific info */
 318         void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
 319         /* close a file */
 320         void (*close)(const unsigned int, struct cifs_tcon *,
 321                       struct cifs_fid *);
 322         /* send a flush request to the server */
 323         int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
 324         /* async read from the server */
 325         int (*async_readv)(struct cifs_readdata *);
 326         /* async write to the server */
 327         int (*async_writev)(struct cifs_writedata *,
 328                             void (*release)(struct kref *));
 329         /* sync read from the server */
 330         int (*sync_read)(const unsigned int, struct cifs_fid *,
 331                          struct cifs_io_parms *, unsigned int *, char **,
 332                          int *);
 333         /* sync write to the server */
 334         int (*sync_write)(const unsigned int, struct cifs_fid *,
 335                           struct cifs_io_parms *, unsigned int *, struct kvec *,
 336                           unsigned long);
 337         /* open dir, start readdir */
 338         int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
 339                                const char *, struct cifs_sb_info *,
 340                                struct cifs_fid *, __u16,
 341                                struct cifs_search_info *);
 342         /* continue readdir */
 343         int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
 344                               struct cifs_fid *,
 345                               __u16, struct cifs_search_info *srch_inf);
 346         /* close dir */
 347         int (*close_dir)(const unsigned int, struct cifs_tcon *,
 348                          struct cifs_fid *);
 349         /* calculate a size of SMB message */
 350         unsigned int (*calc_smb_size)(void *);
 351         /* check for STATUS_PENDING and process it in a positive case */
 352         bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
 353         /* send oplock break response */
 354         int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
 355                                struct cifsInodeInfo *);
 356         /* query remote filesystem */
 357         int (*queryfs)(const unsigned int, struct cifs_tcon *,
 358                        struct kstatfs *);
 359         /* send mandatory brlock to the server */
 360         int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
 361                          __u64, __u32, int, int, bool);
 362         /* unlock range of mandatory locks */
 363         int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
 364                                  const unsigned int);
 365         /* push brlocks from the cache to the server */
 366         int (*push_mand_locks)(struct cifsFileInfo *);
 367         /* get lease key of the inode */
 368         void (*get_lease_key)(struct inode *, struct cifs_fid *);
 369         /* set lease key of the inode */
 370         void (*set_lease_key)(struct inode *, struct cifs_fid *);
 371         /* generate new lease key */
 372         void (*new_lease_key)(struct cifs_fid *);
 373         int (*generate_signingkey)(struct cifs_ses *);
 374         int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
 375         int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
 376                              struct cifsFileInfo *src_file);
 377         int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
 378                                 struct cifs_sb_info *, const unsigned char *,
 379                                 char *, unsigned int *);
 380         int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
 381                                  struct cifs_sb_info *, const unsigned char *,
 382                                  char *, unsigned int *);
 383         /* if we can do cache read operations */
 384         bool (*is_read_op)(__u32);
 385         /* set oplock level for the inode */
 386         void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
 387                                  bool *);
 388         /* create lease context buffer for CREATE request */
 389         char * (*create_lease_buf)(u8 *, u8);
 390         /* parse lease context buffer and return oplock/epoch info */
 391         __u8 (*parse_lease_buf)(void *, unsigned int *);
 392         int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
 393                         struct cifsFileInfo *target_file, u64 src_off, u64 len,
 394                         u64 dest_off);
 395         int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
 396                         struct cifsFileInfo *target_file, u64 src_off, u64 len,
 397                         u64 dest_off);
 398         int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
 399         ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
 400                         const unsigned char *, const unsigned char *, char *,
 401                         size_t, const struct nls_table *, int);
 402         int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
 403                         const char *, const void *, const __u16,
 404                         const struct nls_table *, int);
 405         struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
 406                         const char *, u32 *);
 407         struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
 408                         const struct cifs_fid *, u32 *);
 409         int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
 410                         int);
 411         /* writepages retry size */
 412         unsigned int (*wp_retry_size)(struct inode *);
 413         /* get mtu credits */
 414         int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
 415                                 unsigned int *, unsigned int *);
 416         /* check if we need to issue closedir */
 417         bool (*dir_needs_close)(struct cifsFileInfo *);
 418         long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
 419                           loff_t);
 420 };
 421
 422 struct smb_version_values {
 423         char            *version_string;
 424         __u16           protocol_id;
 425         __u32           req_capabilities;
 426         __u32           large_lock_type;
 427         __u32           exclusive_lock_type;
 428         __u32           shared_lock_type;
 429         __u32           unlock_lock_type;
 430         size_t          header_size;
 431         size_t          max_header_size;
 432         size_t          read_rsp_size;
 433         __le16          lock_cmd;
 434         unsigned int    cap_unix;
 435         unsigned int    cap_nt_find;
 436         unsigned int    cap_large_files;
 437         __u16           signing_enabled;
 438         __u16           signing_required;
 439         size_t          create_lease_size;
 440 };
 441
 442 #define HEADER_SIZE(server) (server->vals->header_size)
 443 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
 444
 445 struct smb_vol {
 446         char *username;
 447         char *password;
 448         char *domainname;
 449         char *UNC;
 450         char *iocharset;  /* local code page for mapping to and from Unicode */
 451         char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
 452         char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
 453         kuid_t cred_uid;
 454         kuid_t linux_uid;
 455         kgid_t linux_gid;
 456         kuid_t backupuid;
 457         kgid_t backupgid;
 458         umode_t file_mode;
 459         umode_t dir_mode;
 460         enum securityEnum sectype; /* sectype requested via mnt opts */
 461         bool sign; /* was signing requested via mnt opts? */
 462         bool retry:1;
 463         bool intr:1;
 464         bool setuids:1;
 465         bool override_uid:1;
 466         bool override_gid:1;
 467         bool dynperm:1;
 468         bool noperm:1;
 469         bool no_psx_acl:1; /* set if posix acl support should be disabled */
 470         bool cifs_acl:1;
 471         bool backupuid_specified; /* mount option  backupuid  is specified */
 472         bool backupgid_specified; /* mount option  backupgid  is specified */
 473         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
 474         bool server_ino:1; /* use inode numbers from server ie UniqueId */
 475         bool direct_io:1;
 476         bool strict_io:1; /* strict cache behavior */
 477         bool remap:1;      /* set to remap seven reserved chars in filenames */
 478         bool sfu_remap:1;  /* remap seven reserved chars ala SFU */
 479         bool posix_paths:1; /* unset to not ask for posix pathnames. */
 480         bool no_linux_ext:1;
 481         bool sfu_emul:1;
 482         bool nullauth:1;   /* attempt to authenticate with null user */
 483         bool nocase:1;     /* request case insensitive filenames */
 484         bool nobrl:1;      /* disable sending byte range locks to srv */
 485         bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
 486         bool seal:1;       /* request transport encryption on share */
 487         bool nodfs:1;      /* Do not request DFS, even if available */
 488         bool local_lease:1; /* check leases only on local system, not remote */
 489         bool noblocksnd:1;
 490         bool noautotune:1;
 491         bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
 492         bool fsc:1;     /* enable fscache */
 493         bool mfsymlinks:1; /* use Minshall+French Symlinks */
 494         bool multiuser:1;
 495         bool rwpidforward:1; /* pid forward for read/write operations */
 496         bool nosharesock:1;
 497         bool persistent:1;
 498         bool nopersistent:1;
 499         bool resilient:1; /* noresilient not required since not fored for CA */
 500         unsigned int rsize;
 501         unsigned int wsize;
 502         bool sockopt_tcp_nodelay:1;
 503         unsigned long actimeo; /* attribute cache timeout (jiffies) */
 504         struct smb_version_operations *ops;
 505         struct smb_version_values *vals;
 506         char *prepath;
 507         struct sockaddr_storage dstaddr; /* destination address */
 508         struct sockaddr_storage srcaddr; /* allow binding to a local IP */
 509         struct nls_table *local_nls;
 510 };
 511
 512 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
 513                          CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
 514                          CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
 515                          CIFS_MOUNT_MAP_SFM_CHR | \
 516                          CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
 517                          CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
 518                          CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
 519                          CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
 520                          CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
 521                          CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
 522                          CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
 523
 524 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
 525                       MS_NODEV | MS_SYNCHRONOUS)
 526
 527 struct cifs_mnt_data {
 528         struct cifs_sb_info *cifs_sb;
 529         struct smb_vol *vol;
 530         int flags;
 531 };
 532
 533 static inline unsigned int
 534 get_rfc1002_length(void *buf)
 535 {
 536         return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
 537 }
 538
 539 static inline void
 540 inc_rfc1001_len(void *buf, int count)
 541 {
 542         be32_add_cpu((__be32 *)buf, count);
 543 }
 544
 545 struct TCP_Server_Info {
 546         struct list_head tcp_ses_list;
 547         struct list_head smb_ses_list;
 548         int srv_count; /* reference counter */
 549         /* 15 character server name + 0x20 16th byte indicating type = srv */
 550         char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 551         struct smb_version_operations   *ops;
 552         struct smb_version_values       *vals;
 553         enum statusEnum tcpStatus; /* what we think the status is */
 554         char *hostname; /* hostname portion of UNC string */
 555         struct socket *ssocket;
 556         struct sockaddr_storage dstaddr;
 557         struct sockaddr_storage srcaddr; /* locally bind to this IP */
 558 #ifdef CONFIG_NET_NS
 559         struct net *net;
 560 #endif
 561         wait_queue_head_t response_q;
 562         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 563         struct list_head pending_mid_q;
 564         bool noblocksnd;                /* use blocking sendmsg */
 565         bool noautotune;                /* do not autotune send buf sizes */
 566         bool tcp_nodelay;
 567         int credits;  /* send no more requests at once */
 568         unsigned int in_flight;  /* number of requests on the wire to server */
 569         spinlock_t req_lock;  /* protect the two values above */
 570         struct mutex srv_mutex;
 571         struct task_struct *tsk;
 572         char server_GUID[16];
 573         __u16 sec_mode;
 574         bool sign; /* is signing enabled on this connection? */
 575         bool session_estab; /* mark when very first sess is established */
 576 #ifdef CONFIG_CIFS_SMB2
 577         int echo_credits;  /* echo reserved slots */
 578         int oplock_credits;  /* oplock break reserved slots */
 579         bool echoes:1; /* enable echoes */
 580         __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
 581 #endif
 582         u16 dialect; /* dialect index that server chose */
 583         bool oplocks:1; /* enable oplocks */
 584         unsigned int maxReq;    /* Clients should submit no more */
 585         /* than maxReq distinct unanswered SMBs to the server when using  */
 586         /* multiplexed reads or writes */
 587         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 588         /* message size the server can send or receive for non-raw SMBs */
 589         /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
 590         /* when socket is setup (and during reconnect) before NegProt sent */
 591         unsigned int max_rw;    /* maxRw specifies the maximum */
 592         /* message size the server can send or receive for */
 593         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 594         unsigned int capabilities; /* selective disabling of caps by smb sess */
 595         int timeAdj;  /* Adjust for difference in server time zone in sec */
 596         __u64 CurrentMid;         /* multiplex id - rotating counter */
 597         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
 598         /* 16th byte of RFC1001 workstation name is always null */
 599         char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 600         __u32 sequence_number; /* for signing, protected by srv_mutex */
 601         struct session_key session_key;
 602         unsigned long lstrp; /* when we got last response from this server */
 603         struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
 604 #define CIFS_NEGFLAVOR_LANMAN   0       /* wct == 13, LANMAN */
 605 #define CIFS_NEGFLAVOR_UNENCAP  1       /* wct == 17, but no ext_sec */
 606 #define CIFS_NEGFLAVOR_EXTENDED 2       /* wct == 17, ext_sec bit set */
 607         char    negflavor;      /* NEGOTIATE response flavor */
 608         /* extended security flavors that server supports */
 609         bool    sec_ntlmssp;            /* supports NTLMSSP */
 610         bool    sec_kerberosu2u;        /* supports U2U Kerberos */
 611         bool    sec_kerberos;           /* supports plain Kerberos */
 612         bool    sec_mskerberos;         /* supports legacy MS Kerberos */
 613         bool    large_buf;              /* is current buffer large? */
 614         struct delayed_work     echo; /* echo ping workqueue job */
 615         struct kvec *iov;       /* reusable kvec array for receives */
 616         unsigned int nr_iov;    /* number of kvecs in array */
 617         char    *smallbuf;      /* pointer to current "small" buffer */
 618         char    *bigbuf;        /* pointer to current "big" buffer */
 619         unsigned int total_read; /* total amount of data read in this pass */
 620 #ifdef CONFIG_CIFS_FSCACHE
 621         struct fscache_cookie   *fscache; /* client index cache cookie */
 622 #endif
 623 #ifdef CONFIG_CIFS_STATS2
 624         atomic_t in_send; /* requests trying to send */
 625         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 626 #endif
 627 #ifdef CONFIG_CIFS_SMB2
 628         unsigned int    max_read;
 629         unsigned int    max_write;
 630 #endif /* CONFIG_CIFS_SMB2 */
 631 };
 632
 633 static inline unsigned int
 634 in_flight(struct TCP_Server_Info *server)
 635 {
 636         unsigned int num;
 637         spin_lock(&server->req_lock);
 638         num = server->in_flight;
 639         spin_unlock(&server->req_lock);
 640         return num;
 641 }
 642
 643 static inline bool
 644 has_credits(struct TCP_Server_Info *server, int *credits)
 645 {
 646         int num;
 647         spin_lock(&server->req_lock);
 648         num = *credits;
 649         spin_unlock(&server->req_lock);
 650         return num > 0;
 651 }
 652
 653 static inline void
 654 add_credits(struct TCP_Server_Info *server, const unsigned int add,
 655             const int optype)
 656 {
 657         server->ops->add_credits(server, add, optype);
 658 }
 659
 660 static inline void
 661 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
 662                         const int optype)
 663 {
 664         if (add) {
 665                 server->ops->add_credits(server, add, optype);
 666                 wake_up(&server->request_q);
 667         }
 668 }
 669
 670 static inline void
 671 set_credits(struct TCP_Server_Info *server, const int val)
 672 {
 673         server->ops->set_credits(server, val);
 674 }
 675
 676 static inline __le64
 677 get_next_mid64(struct TCP_Server_Info *server)
 678 {
 679         return cpu_to_le64(server->ops->get_next_mid(server));
 680 }
 681
 682 static inline __le16
 683 get_next_mid(struct TCP_Server_Info *server)
 684 {
 685         __u16 mid = server->ops->get_next_mid(server);
 686         /*
 687          * The value in the SMB header should be little endian for easy
 688          * on-the-wire decoding.
 689          */
 690         return cpu_to_le16(mid);
 691 }
 692
 693 static inline __u16
 694 get_mid(const struct smb_hdr *smb)
 695 {
 696         return le16_to_cpu(smb->Mid);
 697 }
 698
 699 static inline bool
 700 compare_mid(__u16 mid, const struct smb_hdr *smb)
 701 {
 702         return mid == le16_to_cpu(smb->Mid);
 703 }
 704
 705 /*
 706  * When the server supports very large reads and writes via POSIX extensions,
 707  * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
 708  * including the RFC1001 length.
 709  *
 710  * Note that this might make for "interesting" allocation problems during
 711  * writeback however as we have to allocate an array of pointers for the
 712  * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
 713  *
 714  * For reads, there is a similar problem as we need to allocate an array
 715  * of kvecs to handle the receive, though that should only need to be done
 716  * once.
 717  */
 718 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
 719 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
 720
 721 /*
 722  * When the server doesn't allow large posix writes, only allow a rsize/wsize
 723  * of 2^17-1 minus the size of the call header. That allows for a read or
 724  * write up to the maximum size described by RFC1002.
 725  */
 726 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
 727 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
 728
 729 /*
 730  * The default wsize is 1M. find_get_pages seems to return a maximum of 256
 731  * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
 732  * a single wsize request with a single call.
 733  */
 734 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
 735
 736 /*
 737  * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
 738  * those values when posix extensions aren't in force. In actuality here, we
 739  * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
 740  * to be ok with the extra byte even though Windows doesn't send writes that
 741  * are that large.
 742  *
 743  * Citation:
 744  *
 745  * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
 746  */
 747 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
 748 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
 749
 750 /*
 751  * Macros to allow the TCP_Server_Info->net field and related code to drop out
 752  * when CONFIG_NET_NS isn't set.
 753  */
 754
 755 #ifdef CONFIG_NET_NS
 756
 757 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 758 {
 759         return srv->net;
 760 }
 761
 762 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 763 {
 764         srv->net = net;
 765 }
 766
 767 #else
 768
 769 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 770 {
 771         return &init_net;
 772 }
 773
 774 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 775 {
 776 }
 777
 778 #endif
 779
 780 /*
 781  * Session structure.  One of these for each uid session with a particular host
 782  */
 783 struct cifs_ses {
 784         struct list_head smb_ses_list;
 785         struct list_head tcon_list;
 786         struct mutex session_mutex;
 787         struct TCP_Server_Info *server; /* pointer to server info */
 788         int ses_count;          /* reference counter */
 789         enum statusEnum status;
 790         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 791         __u16 ipc_tid;          /* special tid for connection to IPC share */
 792         char *serverOS;         /* name of operating system underlying server */
 793         char *serverNOS;        /* name of network operating system of server */
 794         char *serverDomain;     /* security realm of server */
 795         __u64 Suid;             /* remote smb uid  */
 796         kuid_t linux_uid;       /* overriding owner of files on the mount */
 797         kuid_t cred_uid;        /* owner of credentials */
 798         unsigned int capabilities;
 799         char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
 800                                 TCP names - will ipv6 and sctp addresses fit? */
 801         char *user_name;        /* must not be null except during init of sess
 802                                    and after mount option parsing we fill it */
 803         char *domainName;
 804         char *password;
 805         struct session_key auth_key;
 806         struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
 807         enum securityEnum sectype; /* what security flavor was specified? */
 808         bool sign;              /* is signing required? */
 809         bool need_reconnect:1; /* connection reset, uid now invalid */
 810 #ifdef CONFIG_CIFS_SMB2
 811         __u16 session_flags;
 812         char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
 813 #endif /* CONFIG_CIFS_SMB2 */
 814 };
 815
 816 static inline bool
 817 cap_unix(struct cifs_ses *ses)
 818 {
 819         return ses->server->vals->cap_unix & ses->capabilities;
 820 }
 821
 822 /*
 823  * there is one of these for each connection to a resource on a particular
 824  * session
 825  */
 826 struct cifs_tcon {
 827         struct list_head tcon_list;
 828         int tc_count;
 829         struct list_head openFileList;
 830         struct cifs_ses *ses;   /* pointer to session associated with */
 831         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 832         char *nativeFileSystem;
 833         char *password;         /* for share-level security */
 834         __u32 tid;              /* The 4 byte tree id */
 835         __u16 Flags;            /* optional support bits */
 836         enum statusEnum tidStatus;
 837 #ifdef CONFIG_CIFS_STATS
 838         atomic_t num_smbs_sent;
 839         union {
 840                 struct {
 841                         atomic_t num_writes;
 842                         atomic_t num_reads;
 843                         atomic_t num_flushes;
 844                         atomic_t num_oplock_brks;
 845                         atomic_t num_opens;
 846                         atomic_t num_closes;
 847                         atomic_t num_deletes;
 848                         atomic_t num_mkdirs;
 849                         atomic_t num_posixopens;
 850                         atomic_t num_posixmkdirs;
 851                         atomic_t num_rmdirs;
 852                         atomic_t num_renames;
 853                         atomic_t num_t2renames;
 854                         atomic_t num_ffirst;
 855                         atomic_t num_fnext;
 856                         atomic_t num_fclose;
 857                         atomic_t num_hardlinks;
 858                         atomic_t num_symlinks;
 859                         atomic_t num_locks;
 860                         atomic_t num_acl_get;
 861                         atomic_t num_acl_set;
 862                 } cifs_stats;
 863 #ifdef CONFIG_CIFS_SMB2
 864                 struct {
 865                         atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
 866                         atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
 867                 } smb2_stats;
 868 #endif /* CONFIG_CIFS_SMB2 */
 869         } stats;
 870 #ifdef CONFIG_CIFS_STATS2
 871         unsigned long long time_writes;
 872         unsigned long long time_reads;
 873         unsigned long long time_opens;
 874         unsigned long long time_deletes;
 875         unsigned long long time_closes;
 876         unsigned long long time_mkdirs;
 877         unsigned long long time_rmdirs;
 878         unsigned long long time_renames;
 879         unsigned long long time_t2renames;
 880         unsigned long long time_ffirst;
 881         unsigned long long time_fnext;
 882         unsigned long long time_fclose;
 883 #endif /* CONFIG_CIFS_STATS2 */
 884         __u64    bytes_read;
 885         __u64    bytes_written;
 886         spinlock_t stat_lock;
 887 #endif /* CONFIG_CIFS_STATS */
 888         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 889         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 890         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 891         bool ipc:1;             /* set if connection to IPC$ eg for RPC/PIPES */
 892         bool retry:1;
 893         bool nocase:1;
 894         bool seal:1;      /* transport encryption for this mounted share */
 895         bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 896                                 for this mount even if server would support */
 897         bool local_lease:1; /* check leases (only) on local system not remote */
 898         bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 899         bool broken_sparse_sup; /* if server or share does not support sparse */
 900         bool need_reconnect:1; /* connection reset, tid now invalid */
 901         bool use_resilient:1; /* use resilient instead of durable handles */
 902         bool use_persistent:1; /* use persistent instead of durable handles */
 903 #ifdef CONFIG_CIFS_SMB2
 904         bool print:1;           /* set if connection to printer share */
 905         bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
 906         __le32 capabilities;
 907         __u32 share_flags;
 908         __u32 maximal_access;
 909         __u32 vol_serial_number;
 910         __le64 vol_create_time;
 911         __u32 ss_flags;         /* sector size flags */
 912         __u32 perf_sector_size; /* best sector size for perf */
 913         __u32 max_chunks;
 914         __u32 max_bytes_chunk;
 915         __u32 max_bytes_copy;
 916 #endif /* CONFIG_CIFS_SMB2 */
 917 #ifdef CONFIG_CIFS_FSCACHE
 918         u64 resource_id;                /* server resource id */
 919         struct fscache_cookie *fscache; /* cookie for share */
 920 #endif
 921         struct list_head pending_opens; /* list of incomplete opens */
 922         /* BB add field for back pointer to sb struct(s)? */
 923 };
 924
 925 /*
 926  * This is a refcounted and timestamped container for a tcon pointer. The
 927  * container holds a tcon reference. It is considered safe to free one of
 928  * these when the tl_count goes to 0. The tl_time is the time of the last
 929  * "get" on the container.
 930  */
 931 struct tcon_link {
 932         struct rb_node          tl_rbnode;
 933         kuid_t                  tl_uid;
 934         unsigned long           tl_flags;
 935 #define TCON_LINK_MASTER        0
 936 #define TCON_LINK_PENDING       1
 937 #define TCON_LINK_IN_TREE       2
 938         unsigned long           tl_time;
 939         atomic_t                tl_count;
 940         struct cifs_tcon        *tl_tcon;
 941 };
 942
 943 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
 944
 945 static inline struct cifs_tcon *
 946 tlink_tcon(struct tcon_link *tlink)
 947 {
 948         return tlink->tl_tcon;
 949 }
 950
 951 extern void cifs_put_tlink(struct tcon_link *tlink);
 952
 953 static inline struct tcon_link *
 954 cifs_get_tlink(struct tcon_link *tlink)
 955 {
 956         if (tlink && !IS_ERR(tlink))
 957                 atomic_inc(&tlink->tl_count);
 958         return tlink;
 959 }
 960
 961 /* This function is always expected to succeed */
 962 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
 963
 964 #define CIFS_OPLOCK_NO_CHANGE 0xfe
 965
 966 struct cifs_pending_open {
 967         struct list_head olist;
 968         struct tcon_link *tlink;
 969         __u8 lease_key[16];
 970         __u32 oplock;
 971 };
 972
 973 /*
 974  * This info hangs off the cifsFileInfo structure, pointed to by llist.
 975  * This is used to track byte stream locks on the file
 976  */
 977 struct cifsLockInfo {
 978         struct list_head llist; /* pointer to next cifsLockInfo */
 979         struct list_head blist; /* pointer to locks blocked on this */
 980         wait_queue_head_t block_q;
 981         __u64 offset;
 982         __u64 length;
 983         __u32 pid;
 984         __u32 type;
 985 };
 986
 987 /*
 988  * One of these for each open instance of a file
 989  */
 990 struct cifs_search_info {
 991         loff_t index_of_last_entry;
 992         __u16 entries_in_buffer;
 993         __u16 info_level;
 994         __u32 resume_key;
 995         char *ntwrk_buf_start;
 996         char *srch_entries_start;
 997         char *last_entry;
 998         const char *presume_name;
 999         unsigned int resume_name_len;
1000         bool endOfSearch:1;
1001         bool emptyDir:1;
1002         bool unicode:1;
1003         bool smallBuf:1; /* so we know which buf_release function to call */
1004 };
1005
1006 struct cifs_open_parms {
1007         struct cifs_tcon *tcon;
1008         struct cifs_sb_info *cifs_sb;
1009         int disposition;
1010         int desired_access;
1011         int create_options;
1012         const char *path;
1013         struct cifs_fid *fid;
1014         bool reconnect:1;
1015 };
1016
1017 struct cifs_fid {
1018         __u16 netfid;
1019 #ifdef CONFIG_CIFS_SMB2
1020         __u64 persistent_fid;   /* persist file id for smb2 */
1021         __u64 volatile_fid;     /* volatile file id for smb2 */
1022         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for smb2 */
1023         __u8 create_guid[16];
1024 #endif
1025         struct cifs_pending_open *pending_open;
1026         unsigned int epoch;
1027         bool purge_cache;
1028 };
1029
1030 struct cifs_fid_locks {
1031         struct list_head llist;
1032         struct cifsFileInfo *cfile;     /* fid that owns locks */
1033         struct list_head locks;         /* locks held by fid above */
1034 };
1035
1036 struct cifsFileInfo {
1037         struct list_head tlist; /* pointer to next fid owned by tcon */
1038         struct list_head flist; /* next fid (file instance) for this inode */
1039         struct cifs_fid_locks *llist;   /* brlocks held by this fid */
1040         kuid_t uid;             /* allows finding which FileInfo structure */
1041         __u32 pid;              /* process id who opened file */
1042         struct cifs_fid fid;    /* file id from remote */
1043         /* BB add lock scope info here if needed */ ;
1044         /* lock scope id (0 if none) */
1045         struct dentry *dentry;
1046         unsigned int f_flags;
1047         struct tcon_link *tlink;
1048         bool invalidHandle:1;   /* file closed via session abend */
1049         bool oplock_break_cancelled:1;
1050         int count;              /* refcount protected by cifs_file_list_lock */
1051         struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1052         struct cifs_search_info srch_inf;
1053         struct work_struct oplock_break; /* work for oplock breaks */
1054 };
1055
1056 struct cifs_io_parms {
1057         __u16 netfid;
1058 #ifdef CONFIG_CIFS_SMB2
1059         __u64 persistent_fid;   /* persist file id for smb2 */
1060         __u64 volatile_fid;     /* volatile file id for smb2 */
1061 #endif
1062         __u32 pid;
1063         __u64 offset;
1064         unsigned int length;
1065         struct cifs_tcon *tcon;
1066 };
1067
1068 struct cifs_readdata;
1069
1070 /* asynchronous read support */
1071 struct cifs_readdata {
1072         struct kref                     refcount;
1073         struct list_head                list;
1074         struct completion               done;
1075         struct cifsFileInfo             *cfile;
1076         struct address_space            *mapping;
1077         __u64                           offset;
1078         unsigned int                    bytes;
1079         unsigned int                    got_bytes;
1080         pid_t                           pid;
1081         int                             result;
1082         struct work_struct              work;
1083         int (*read_into_pages)(struct TCP_Server_Info *server,
1084                                 struct cifs_readdata *rdata,
1085                                 unsigned int len);
1086         struct kvec                     iov;
1087         unsigned int                    pagesz;
1088         unsigned int                    tailsz;
1089         unsigned int                    credits;
1090         unsigned int                    nr_pages;
1091         struct page                     *pages[];
1092 };
1093
1094 struct cifs_writedata;
1095
1096 /* asynchronous write support */
1097 struct cifs_writedata {
1098         struct kref                     refcount;
1099         struct list_head                list;
1100         struct completion               done;
1101         enum writeback_sync_modes       sync_mode;
1102         struct work_struct              work;
1103         struct cifsFileInfo             *cfile;
1104         __u64                           offset;
1105         pid_t                           pid;
1106         unsigned int                    bytes;
1107         int                             result;
1108         unsigned int                    pagesz;
1109         unsigned int                    tailsz;
1110         unsigned int                    credits;
1111         unsigned int                    nr_pages;
1112         struct page                     *pages[];
1113 };
1114
1115 /*
1116  * Take a reference on the file private data. Must be called with
1117  * cifs_file_list_lock held.
1118  */
1119 static inline void
1120 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1121 {
1122         ++cifs_file->count;
1123 }
1124
1125 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1126 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1127
1128 #define CIFS_CACHE_READ_FLG     1
1129 #define CIFS_CACHE_HANDLE_FLG   2
1130 #define CIFS_CACHE_RH_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1131 #define CIFS_CACHE_WRITE_FLG    4
1132 #define CIFS_CACHE_RW_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1133 #define CIFS_CACHE_RHW_FLG      (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1134
1135 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1136 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1137 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1138
1139 /*
1140  * One of these for each file inode
1141  */
1142
1143 struct cifsInodeInfo {
1144         bool can_cache_brlcks;
1145         struct list_head llist; /* locks helb by this inode */
1146         struct rw_semaphore lock_sem;   /* protect the fields above */
1147         /* BB add in lists for dirty pages i.e. write caching info for oplock */
1148         struct list_head openFileList;
1149         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1150         unsigned int oplock;            /* oplock/lease level we have */
1151         unsigned int epoch;             /* used to track lease state changes */
1152 #define CIFS_INODE_PENDING_OPLOCK_BREAK   (0) /* oplock break in progress */
1153 #define CIFS_INODE_PENDING_WRITERS        (1) /* Writes in progress */
1154 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1155 #define CIFS_INO_DELETE_PENDING           (3) /* delete pending on server */
1156 #define CIFS_INO_INVALID_MAPPING          (4) /* pagecache is invalid */
1157 #define CIFS_INO_LOCK                     (5) /* lock bit for synchronization */
1158         unsigned long flags;
1159         spinlock_t writers_lock;
1160         unsigned int writers;           /* Number of writers on this inode */
1161         unsigned long time;             /* jiffies of last update of inode */
1162         u64  server_eof;                /* current file size on server -- protected by i_lock */
1163         u64  uniqueid;                  /* server inode number */
1164         u64  createtime;                /* creation time on server */
1165 #ifdef CONFIG_CIFS_SMB2
1166         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for this inode */
1167 #endif
1168 #ifdef CONFIG_CIFS_FSCACHE
1169         struct fscache_cookie *fscache;
1170 #endif
1171         struct inode vfs_inode;
1172 };
1173
1174 static inline struct cifsInodeInfo *
1175 CIFS_I(struct inode *inode)
1176 {
1177         return container_of(inode, struct cifsInodeInfo, vfs_inode);
1178 }
1179
1180 static inline struct cifs_sb_info *
1181 CIFS_SB(struct super_block *sb)
1182 {
1183         return sb->s_fs_info;
1184 }
1185
1186 static inline struct cifs_sb_info *
1187 CIFS_FILE_SB(struct file *file)
1188 {
1189         return CIFS_SB(file_inode(file)->i_sb);
1190 }
1191
1192 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1193 {
1194         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1195                 return '/';
1196         else
1197                 return '\\';
1198 }
1199
1200 static inline void
1201 convert_delimiter(char *path, char delim)
1202 {
1203         char old_delim, *pos;
1204
1205         if (delim == '/')
1206                 old_delim = '\\';
1207         else
1208                 old_delim = '/';
1209
1210         pos = path;
1211         while ((pos = strchr(pos, old_delim)))
1212                 *pos = delim;
1213 }
1214
1215 #ifdef CONFIG_CIFS_STATS
1216 #define cifs_stats_inc atomic_inc
1217
1218 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1219                                             unsigned int bytes)
1220 {
1221         if (bytes) {
1222                 spin_lock(&tcon->stat_lock);
1223                 tcon->bytes_written += bytes;
1224                 spin_unlock(&tcon->stat_lock);
1225         }
1226 }
1227
1228 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1229                                          unsigned int bytes)
1230 {
1231         spin_lock(&tcon->stat_lock);
1232         tcon->bytes_read += bytes;
1233         spin_unlock(&tcon->stat_lock);
1234 }
1235 #else
1236
1237 #define  cifs_stats_inc(field) do {} while (0)
1238 #define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1239 #define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1240
1241 #endif
1242
1243
1244 /*
1245  * This is the prototype for the mid receive function. This function is for
1246  * receiving the rest of the SMB frame, starting with the WordCount (which is
1247  * just after the MID in struct smb_hdr). Note:
1248  *
1249  * - This will be called by cifsd, with no locks held.
1250  * - The mid will still be on the pending_mid_q.
1251  * - mid->resp_buf will point to the current buffer.
1252  *
1253  * Returns zero on a successful receive, or an error. The receive state in
1254  * the TCP_Server_Info will also be updated.
1255  */
1256 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1257                             struct mid_q_entry *mid);
1258
1259 /*
1260  * This is the prototype for the mid callback function. This is called once the
1261  * mid has been received off of the socket. When creating one, take special
1262  * care to avoid deadlocks. Things to bear in mind:
1263  *
1264  * - it will be called by cifsd, with no locks held
1265  * - the mid will be removed from any lists
1266  */
1267 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1268
1269 /* one of these for every pending CIFS request to the server */
1270 struct mid_q_entry {
1271         struct list_head qhead; /* mids waiting on reply from this server */
1272         struct TCP_Server_Info *server; /* server corresponding to this mid */
1273         __u64 mid;              /* multiplex id */
1274         __u32 pid;              /* process id */
1275         __u32 sequence_number;  /* for CIFS signing */
1276         unsigned long when_alloc;  /* when mid was created */
1277 #ifdef CONFIG_CIFS_STATS2
1278         unsigned long when_sent; /* time when smb send finished */
1279         unsigned long when_received; /* when demux complete (taken off wire) */
1280 #endif
1281         mid_receive_t *receive; /* call receive callback */
1282         mid_callback_t *callback; /* call completion callback */
1283         void *callback_data;      /* general purpose pointer for callback */
1284         void *resp_buf;         /* pointer to received SMB header */
1285         int mid_state;  /* wish this were enum but can not pass to wait_event */
1286         __le16 command;         /* smb command code */
1287         bool large_buf:1;       /* if valid response, is pointer to large buf */
1288         bool multiRsp:1;        /* multiple trans2 responses for one request  */
1289         bool multiEnd:1;        /* both received */
1290 };
1291
1292 /*      Make code in transport.c a little cleaner by moving
1293         update of optional stats into function below */
1294 #ifdef CONFIG_CIFS_STATS2
1295
1296 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1297 {
1298         atomic_inc(&server->in_send);
1299 }
1300
1301 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1302 {
1303         atomic_dec(&server->in_send);
1304 }
1305
1306 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1307 {
1308         atomic_inc(&server->num_waiters);
1309 }
1310
1311 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1312 {
1313         atomic_dec(&server->num_waiters);
1314 }
1315
1316 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1317 {
1318         mid->when_sent = jiffies;
1319 }
1320 #else
1321 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1322 {
1323 }
1324 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1325 {
1326 }
1327
1328 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1329 {
1330 }
1331
1332 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1333 {
1334 }
1335
1336 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1337 {
1338 }
1339 #endif
1340
1341 /* for pending dnotify requests */
1342 struct dir_notify_req {
1343         struct list_head lhead;
1344         __le16 Pid;
1345         __le16 PidHigh;
1346         __u16 Mid;
1347         __u16 Tid;
1348         __u16 Uid;
1349         __u16 netfid;
1350         __u32 filter; /* CompletionFilter (for multishot) */
1351         int multishot;
1352         struct file *pfile;
1353 };
1354
1355 struct dfs_info3_param {
1356         int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1357         int path_consumed;
1358         int server_type;
1359         int ref_flag;
1360         char *path_name;
1361         char *node_name;
1362 };
1363
1364 /*
1365  * common struct for holding inode info when searching for or updating an
1366  * inode with new info
1367  */
1368
1369 #define CIFS_FATTR_DFS_REFERRAL         0x1
1370 #define CIFS_FATTR_DELETE_PENDING       0x2
1371 #define CIFS_FATTR_NEED_REVAL           0x4
1372 #define CIFS_FATTR_INO_COLLISION        0x8
1373 #define CIFS_FATTR_UNKNOWN_NLINK        0x10
1374
1375 struct cifs_fattr {
1376         u32             cf_flags;
1377         u32             cf_cifsattrs;
1378         u64             cf_uniqueid;
1379         u64             cf_eof;
1380         u64             cf_bytes;
1381         u64             cf_createtime;
1382         kuid_t          cf_uid;
1383         kgid_t          cf_gid;
1384         umode_t         cf_mode;
1385         dev_t           cf_rdev;
1386         unsigned int    cf_nlink;
1387         unsigned int    cf_dtype;
1388         struct timespec cf_atime;
1389         struct timespec cf_mtime;
1390         struct timespec cf_ctime;
1391 };
1392
1393 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1394 {
1395         if (param) {
1396                 kfree(param->path_name);
1397                 kfree(param->node_name);
1398                 kfree(param);
1399         }
1400 }
1401
1402 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1403                                        int number_of_items)
1404 {
1405         int i;
1406         if ((number_of_items == 0) || (param == NULL))
1407                 return;
1408         for (i = 0; i < number_of_items; i++) {
1409                 kfree(param[i].path_name);
1410                 kfree(param[i].node_name);
1411         }
1412         kfree(param);
1413 }
1414
1415 #define   MID_FREE 0
1416 #define   MID_REQUEST_ALLOCATED 1
1417 #define   MID_REQUEST_SUBMITTED 2
1418 #define   MID_RESPONSE_RECEIVED 4
1419 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
1420 #define   MID_RESPONSE_MALFORMED 0x10
1421 #define   MID_SHUTDOWN           0x20
1422
1423 /* Types of response buffer returned from SendReceive2 */
1424 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
1425 #define   CIFS_SMALL_BUFFER     1
1426 #define   CIFS_LARGE_BUFFER     2
1427 #define   CIFS_IOVEC            4    /* array of response buffers */
1428
1429 /* Type of Request to SendReceive2 */
1430 #define   CIFS_BLOCKING_OP      1    /* operation can block */
1431 #define   CIFS_ASYNC_OP         2    /* do not wait for response */
1432 #define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
1433 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
1434 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
1435 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
1436
1437 /* Type of request operation */
1438 #define   CIFS_ECHO_OP      0x080    /* echo request */
1439 #define   CIFS_OBREAK_OP   0x0100    /* oplock break request */
1440 #define   CIFS_NEG_OP      0x0200    /* negotiate request */
1441 #define   CIFS_OP_MASK     0x0380    /* mask request type */
1442 #define   CIFS_HAS_CREDITS 0x0400    /* already has credits */
1443
1444 /* Security Flags: indicate type of session setup needed */
1445 #define   CIFSSEC_MAY_SIGN      0x00001
1446 #define   CIFSSEC_MAY_NTLM      0x00002
1447 #define   CIFSSEC_MAY_NTLMV2    0x00004
1448 #define   CIFSSEC_MAY_KRB5      0x00008
1449 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1450 #define   CIFSSEC_MAY_LANMAN    0x00010
1451 #define   CIFSSEC_MAY_PLNTXT    0x00020
1452 #else
1453 #define   CIFSSEC_MAY_LANMAN    0
1454 #define   CIFSSEC_MAY_PLNTXT    0
1455 #endif /* weak passwords */
1456 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
1457 #define   CIFSSEC_MAY_NTLMSSP   0x00080 /* raw ntlmssp with ntlmv2 */
1458
1459 #define   CIFSSEC_MUST_SIGN     0x01001
1460 /* note that only one of the following can be set so the
1461 result of setting MUST flags more than once will be to
1462 require use of the stronger protocol */
1463 #define   CIFSSEC_MUST_NTLM     0x02002
1464 #define   CIFSSEC_MUST_NTLMV2   0x04004
1465 #define   CIFSSEC_MUST_KRB5     0x08008
1466 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1467 #define   CIFSSEC_MUST_LANMAN   0x10010
1468 #define   CIFSSEC_MUST_PLNTXT   0x20020
1469 #ifdef CONFIG_CIFS_UPCALL
1470 #define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
1471 #else
1472 #define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
1473 #endif /* UPCALL */
1474 #else /* do not allow weak pw hash */
1475 #define   CIFSSEC_MUST_LANMAN   0
1476 #define   CIFSSEC_MUST_PLNTXT   0
1477 #ifdef CONFIG_CIFS_UPCALL
1478 #define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
1479 #else
1480 #define   CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
1481 #endif /* UPCALL */
1482 #endif /* WEAK_PW_HASH */
1483 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
1484 #define   CIFSSEC_MUST_NTLMSSP  0x80080 /* raw ntlmssp with ntlmv2 */
1485
1486 #define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1487 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1488 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1489 /*
1490  *****************************************************************
1491  * All constants go here
1492  *****************************************************************
1493  */
1494
1495 #define UID_HASH (16)
1496
1497 /*
1498  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1499  * following to be declared.
1500  */
1501
1502 /****************************************************************************
1503  *  Locking notes.  All updates to global variables and lists should be
1504  *                  protected by spinlocks or semaphores.
1505  *
1506  *  Spinlocks
1507  *  ---------
1508  *  GlobalMid_Lock protects:
1509  *      list operations on pending_mid_q and oplockQ
1510  *      updates to XID counters, multiplex id  and SMB sequence numbers
1511  *  cifs_file_list_lock protects:
1512  *      list operations on tcp and SMB session lists and tCon lists
1513  *  f_owner.lock protects certain per file struct operations
1514  *  mapping->page_lock protects certain per page operations
1515  *
1516  *  Semaphores
1517  *  ----------
1518  *  sesSem     operations on smb session
1519  *  tconSem    operations on tree connection
1520  *  fh_sem      file handle reconnection operations
1521  *
1522  ****************************************************************************/
1523
1524 #ifdef DECLARE_GLOBALS_HERE
1525 #define GLOBAL_EXTERN
1526 #else
1527 #define GLOBAL_EXTERN extern
1528 #endif
1529
1530 /*
1531  * the list of TCP_Server_Info structures, ie each of the sockets
1532  * connecting our client to a distinct server (ip address), is
1533  * chained together by cifs_tcp_ses_list. The list of all our SMB
1534  * sessions (and from that the tree connections) can be found
1535  * by iterating over cifs_tcp_ses_list
1536  */
1537 GLOBAL_EXTERN struct list_head          cifs_tcp_ses_list;
1538
1539 /*
1540  * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1541  * tcp session, and the list of tcon's per smb session. It also protects
1542  * the reference counters for the server, smb session, and tcon. Finally,
1543  * changes to the tcon->tidStatus should be done while holding this lock.
1544  */
1545 GLOBAL_EXTERN spinlock_t                cifs_tcp_ses_lock;
1546
1547 /*
1548  * This lock protects the cifs_file->llist and cifs_file->flist
1549  * list operations, and updates to some flags (cifs_file->invalidHandle)
1550  * It will be moved to either use the tcon->stat_lock or equivalent later.
1551  * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1552  * the cifs_tcp_ses_lock must be grabbed first and released last.
1553  */
1554 GLOBAL_EXTERN spinlock_t        cifs_file_list_lock;
1555
1556 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1557 /* Outstanding dir notify requests */
1558 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1559 /* DirNotify response queue */
1560 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1561 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1562
1563 /*
1564  * Global transaction id (XID) information
1565  */
1566 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
1567 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1568 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
1569 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
1570                                           /* on midQ entries */
1571 /*
1572  *  Global counters, updated atomically
1573  */
1574 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1575 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1576 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1577 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1578 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1579
1580 /* Various Debug counters */
1581 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
1582 #ifdef CONFIG_CIFS_STATS2
1583 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1584 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1585 #endif
1586 GLOBAL_EXTERN atomic_t smBufAllocCount;
1587 GLOBAL_EXTERN atomic_t midCount;
1588
1589 /* Misc globals */
1590 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1591 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1592 GLOBAL_EXTERN unsigned int global_secflags;     /* if on, session setup sent
1593                                 with more secure ntlmssp2 challenge/resp */
1594 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
1595 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1596 GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
1597 GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
1598 GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
1599 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1600
1601 #ifdef CONFIG_CIFS_ACL
1602 GLOBAL_EXTERN struct rb_root uidtree;
1603 GLOBAL_EXTERN struct rb_root gidtree;
1604 GLOBAL_EXTERN spinlock_t siduidlock;
1605 GLOBAL_EXTERN spinlock_t sidgidlock;
1606 GLOBAL_EXTERN struct rb_root siduidtree;
1607 GLOBAL_EXTERN struct rb_root sidgidtree;
1608 GLOBAL_EXTERN spinlock_t uidsidlock;
1609 GLOBAL_EXTERN spinlock_t gidsidlock;
1610 #endif /* CONFIG_CIFS_ACL */
1611
1612 void cifs_oplock_break(struct work_struct *work);
1613
1614 extern const struct slow_work_ops cifs_oplock_break_ops;
1615 extern struct workqueue_struct *cifsiod_wq;
1616
1617 extern mempool_t *cifs_mid_poolp;
1618
1619 /* Operations for different SMB versions */
1620 #define SMB1_VERSION_STRING     "1.0"
1621 extern struct smb_version_operations smb1_operations;
1622 extern struct smb_version_values smb1_values;
1623 #define SMB20_VERSION_STRING    "2.0"
1624 extern struct smb_version_operations smb20_operations;
1625 extern struct smb_version_values smb20_values;
1626 #define SMB21_VERSION_STRING    "2.1"
1627 extern struct smb_version_operations smb21_operations;
1628 extern struct smb_version_values smb21_values;
1629 #define SMB30_VERSION_STRING    "3.0"
1630 extern struct smb_version_operations smb30_operations;
1631 extern struct smb_version_values smb30_values;
1632 #define SMB302_VERSION_STRING   "3.02"
1633 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1634 extern struct smb_version_values smb302_values;
1635 #define SMB311_VERSION_STRING   "3.1.1"
1636 #define ALT_SMB311_VERSION_STRING "3.11"
1637 extern struct smb_version_operations smb311_operations;
1638 extern struct smb_version_values smb311_values;
1639 #endif  /* _CIFS_GLOB_H */