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;
 497         unsigned int rsize;
 498         unsigned int wsize;
 499         bool sockopt_tcp_nodelay:1;
 500         unsigned long actimeo; /* attribute cache timeout (jiffies) */
 501         struct smb_version_operations *ops;
 502         struct smb_version_values *vals;
 503         char *prepath;
 504         struct sockaddr_storage dstaddr; /* destination address */
 505         struct sockaddr_storage srcaddr; /* allow binding to a local IP */
 506         struct nls_table *local_nls;
 507 };
 508
 509 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
 510                          CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
 511                          CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
 512                          CIFS_MOUNT_MAP_SFM_CHR | \
 513                          CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
 514                          CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
 515                          CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
 516                          CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
 517                          CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
 518                          CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
 519                          CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
 520
 521 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
 522                       MS_NODEV | MS_SYNCHRONOUS)
 523
 524 struct cifs_mnt_data {
 525         struct cifs_sb_info *cifs_sb;
 526         struct smb_vol *vol;
 527         int flags;
 528 };
 529
 530 static inline unsigned int
 531 get_rfc1002_length(void *buf)
 532 {
 533         return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
 534 }
 535
 536 static inline void
 537 inc_rfc1001_len(void *buf, int count)
 538 {
 539         be32_add_cpu((__be32 *)buf, count);
 540 }
 541
 542 struct TCP_Server_Info {
 543         struct list_head tcp_ses_list;
 544         struct list_head smb_ses_list;
 545         int srv_count; /* reference counter */
 546         /* 15 character server name + 0x20 16th byte indicating type = srv */
 547         char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 548         struct smb_version_operations   *ops;
 549         struct smb_version_values       *vals;
 550         enum statusEnum tcpStatus; /* what we think the status is */
 551         char *hostname; /* hostname portion of UNC string */
 552         struct socket *ssocket;
 553         struct sockaddr_storage dstaddr;
 554         struct sockaddr_storage srcaddr; /* locally bind to this IP */
 555 #ifdef CONFIG_NET_NS
 556         struct net *net;
 557 #endif
 558         wait_queue_head_t response_q;
 559         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 560         struct list_head pending_mid_q;
 561         bool noblocksnd;                /* use blocking sendmsg */
 562         bool noautotune;                /* do not autotune send buf sizes */
 563         bool tcp_nodelay;
 564         int credits;  /* send no more requests at once */
 565         unsigned int in_flight;  /* number of requests on the wire to server */
 566         spinlock_t req_lock;  /* protect the two values above */
 567         struct mutex srv_mutex;
 568         struct task_struct *tsk;
 569         char server_GUID[16];
 570         __u16 sec_mode;
 571         bool sign; /* is signing enabled on this connection? */
 572         bool session_estab; /* mark when very first sess is established */
 573 #ifdef CONFIG_CIFS_SMB2
 574         int echo_credits;  /* echo reserved slots */
 575         int oplock_credits;  /* oplock break reserved slots */
 576         bool echoes:1; /* enable echoes */
 577         __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
 578 #endif
 579         u16 dialect; /* dialect index that server chose */
 580         bool oplocks:1; /* enable oplocks */
 581         unsigned int maxReq;    /* Clients should submit no more */
 582         /* than maxReq distinct unanswered SMBs to the server when using  */
 583         /* multiplexed reads or writes */
 584         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 585         /* message size the server can send or receive for non-raw SMBs */
 586         /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
 587         /* when socket is setup (and during reconnect) before NegProt sent */
 588         unsigned int max_rw;    /* maxRw specifies the maximum */
 589         /* message size the server can send or receive for */
 590         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 591         unsigned int capabilities; /* selective disabling of caps by smb sess */
 592         int timeAdj;  /* Adjust for difference in server time zone in sec */
 593         __u64 CurrentMid;         /* multiplex id - rotating counter */
 594         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
 595         /* 16th byte of RFC1001 workstation name is always null */
 596         char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 597         __u32 sequence_number; /* for signing, protected by srv_mutex */
 598         struct session_key session_key;
 599         unsigned long lstrp; /* when we got last response from this server */
 600         struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
 601 #define CIFS_NEGFLAVOR_LANMAN   0       /* wct == 13, LANMAN */
 602 #define CIFS_NEGFLAVOR_UNENCAP  1       /* wct == 17, but no ext_sec */
 603 #define CIFS_NEGFLAVOR_EXTENDED 2       /* wct == 17, ext_sec bit set */
 604         char    negflavor;      /* NEGOTIATE response flavor */
 605         /* extended security flavors that server supports */
 606         bool    sec_ntlmssp;            /* supports NTLMSSP */
 607         bool    sec_kerberosu2u;        /* supports U2U Kerberos */
 608         bool    sec_kerberos;           /* supports plain Kerberos */
 609         bool    sec_mskerberos;         /* supports legacy MS Kerberos */
 610         bool    large_buf;              /* is current buffer large? */
 611         struct delayed_work     echo; /* echo ping workqueue job */
 612         struct kvec *iov;       /* reusable kvec array for receives */
 613         unsigned int nr_iov;    /* number of kvecs in array */
 614         char    *smallbuf;      /* pointer to current "small" buffer */
 615         char    *bigbuf;        /* pointer to current "big" buffer */
 616         unsigned int total_read; /* total amount of data read in this pass */
 617 #ifdef CONFIG_CIFS_FSCACHE
 618         struct fscache_cookie   *fscache; /* client index cache cookie */
 619 #endif
 620 #ifdef CONFIG_CIFS_STATS2
 621         atomic_t in_send; /* requests trying to send */
 622         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 623 #endif
 624 #ifdef CONFIG_CIFS_SMB2
 625         unsigned int    max_read;
 626         unsigned int    max_write;
 627 #endif /* CONFIG_CIFS_SMB2 */
 628 };
 629
 630 static inline unsigned int
 631 in_flight(struct TCP_Server_Info *server)
 632 {
 633         unsigned int num;
 634         spin_lock(&server->req_lock);
 635         num = server->in_flight;
 636         spin_unlock(&server->req_lock);
 637         return num;
 638 }
 639
 640 static inline bool
 641 has_credits(struct TCP_Server_Info *server, int *credits)
 642 {
 643         int num;
 644         spin_lock(&server->req_lock);
 645         num = *credits;
 646         spin_unlock(&server->req_lock);
 647         return num > 0;
 648 }
 649
 650 static inline void
 651 add_credits(struct TCP_Server_Info *server, const unsigned int add,
 652             const int optype)
 653 {
 654         server->ops->add_credits(server, add, optype);
 655 }
 656
 657 static inline void
 658 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
 659                         const int optype)
 660 {
 661         if (add) {
 662                 server->ops->add_credits(server, add, optype);
 663                 wake_up(&server->request_q);
 664         }
 665 }
 666
 667 static inline void
 668 set_credits(struct TCP_Server_Info *server, const int val)
 669 {
 670         server->ops->set_credits(server, val);
 671 }
 672
 673 static inline __le64
 674 get_next_mid64(struct TCP_Server_Info *server)
 675 {
 676         return cpu_to_le64(server->ops->get_next_mid(server));
 677 }
 678
 679 static inline __le16
 680 get_next_mid(struct TCP_Server_Info *server)
 681 {
 682         __u16 mid = server->ops->get_next_mid(server);
 683         /*
 684          * The value in the SMB header should be little endian for easy
 685          * on-the-wire decoding.
 686          */
 687         return cpu_to_le16(mid);
 688 }
 689
 690 static inline __u16
 691 get_mid(const struct smb_hdr *smb)
 692 {
 693         return le16_to_cpu(smb->Mid);
 694 }
 695
 696 static inline bool
 697 compare_mid(__u16 mid, const struct smb_hdr *smb)
 698 {
 699         return mid == le16_to_cpu(smb->Mid);
 700 }
 701
 702 /*
 703  * When the server supports very large reads and writes via POSIX extensions,
 704  * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
 705  * including the RFC1001 length.
 706  *
 707  * Note that this might make for "interesting" allocation problems during
 708  * writeback however as we have to allocate an array of pointers for the
 709  * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
 710  *
 711  * For reads, there is a similar problem as we need to allocate an array
 712  * of kvecs to handle the receive, though that should only need to be done
 713  * once.
 714  */
 715 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
 716 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
 717
 718 /*
 719  * When the server doesn't allow large posix writes, only allow a rsize/wsize
 720  * of 2^17-1 minus the size of the call header. That allows for a read or
 721  * write up to the maximum size described by RFC1002.
 722  */
 723 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
 724 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
 725
 726 /*
 727  * The default wsize is 1M. find_get_pages seems to return a maximum of 256
 728  * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
 729  * a single wsize request with a single call.
 730  */
 731 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
 732
 733 /*
 734  * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
 735  * those values when posix extensions aren't in force. In actuality here, we
 736  * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
 737  * to be ok with the extra byte even though Windows doesn't send writes that
 738  * are that large.
 739  *
 740  * Citation:
 741  *
 742  * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
 743  */
 744 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
 745 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
 746
 747 /*
 748  * Macros to allow the TCP_Server_Info->net field and related code to drop out
 749  * when CONFIG_NET_NS isn't set.
 750  */
 751
 752 #ifdef CONFIG_NET_NS
 753
 754 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 755 {
 756         return srv->net;
 757 }
 758
 759 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 760 {
 761         srv->net = net;
 762 }
 763
 764 #else
 765
 766 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 767 {
 768         return &init_net;
 769 }
 770
 771 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 772 {
 773 }
 774
 775 #endif
 776
 777 /*
 778  * Session structure.  One of these for each uid session with a particular host
 779  */
 780 struct cifs_ses {
 781         struct list_head smb_ses_list;
 782         struct list_head tcon_list;
 783         struct mutex session_mutex;
 784         struct TCP_Server_Info *server; /* pointer to server info */
 785         int ses_count;          /* reference counter */
 786         enum statusEnum status;
 787         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 788         __u16 ipc_tid;          /* special tid for connection to IPC share */
 789         char *serverOS;         /* name of operating system underlying server */
 790         char *serverNOS;        /* name of network operating system of server */
 791         char *serverDomain;     /* security realm of server */
 792         __u64 Suid;             /* remote smb uid  */
 793         kuid_t linux_uid;       /* overriding owner of files on the mount */
 794         kuid_t cred_uid;        /* owner of credentials */
 795         unsigned int capabilities;
 796         char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
 797                                 TCP names - will ipv6 and sctp addresses fit? */
 798         char *user_name;        /* must not be null except during init of sess
 799                                    and after mount option parsing we fill it */
 800         char *domainName;
 801         char *password;
 802         struct session_key auth_key;
 803         struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
 804         enum securityEnum sectype; /* what security flavor was specified? */
 805         bool sign;              /* is signing required? */
 806         bool need_reconnect:1; /* connection reset, uid now invalid */
 807 #ifdef CONFIG_CIFS_SMB2
 808         __u16 session_flags;
 809         char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
 810 #endif /* CONFIG_CIFS_SMB2 */
 811 };
 812
 813 static inline bool
 814 cap_unix(struct cifs_ses *ses)
 815 {
 816         return ses->server->vals->cap_unix & ses->capabilities;
 817 }
 818
 819 /*
 820  * there is one of these for each connection to a resource on a particular
 821  * session
 822  */
 823 struct cifs_tcon {
 824         struct list_head tcon_list;
 825         int tc_count;
 826         struct list_head openFileList;
 827         struct cifs_ses *ses;   /* pointer to session associated with */
 828         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 829         char *nativeFileSystem;
 830         char *password;         /* for share-level security */
 831         __u32 tid;              /* The 4 byte tree id */
 832         __u16 Flags;            /* optional support bits */
 833         enum statusEnum tidStatus;
 834 #ifdef CONFIG_CIFS_STATS
 835         atomic_t num_smbs_sent;
 836         union {
 837                 struct {
 838                         atomic_t num_writes;
 839                         atomic_t num_reads;
 840                         atomic_t num_flushes;
 841                         atomic_t num_oplock_brks;
 842                         atomic_t num_opens;
 843                         atomic_t num_closes;
 844                         atomic_t num_deletes;
 845                         atomic_t num_mkdirs;
 846                         atomic_t num_posixopens;
 847                         atomic_t num_posixmkdirs;
 848                         atomic_t num_rmdirs;
 849                         atomic_t num_renames;
 850                         atomic_t num_t2renames;
 851                         atomic_t num_ffirst;
 852                         atomic_t num_fnext;
 853                         atomic_t num_fclose;
 854                         atomic_t num_hardlinks;
 855                         atomic_t num_symlinks;
 856                         atomic_t num_locks;
 857                         atomic_t num_acl_get;
 858                         atomic_t num_acl_set;
 859                 } cifs_stats;
 860 #ifdef CONFIG_CIFS_SMB2
 861                 struct {
 862                         atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
 863                         atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
 864                 } smb2_stats;
 865 #endif /* CONFIG_CIFS_SMB2 */
 866         } stats;
 867 #ifdef CONFIG_CIFS_STATS2
 868         unsigned long long time_writes;
 869         unsigned long long time_reads;
 870         unsigned long long time_opens;
 871         unsigned long long time_deletes;
 872         unsigned long long time_closes;
 873         unsigned long long time_mkdirs;
 874         unsigned long long time_rmdirs;
 875         unsigned long long time_renames;
 876         unsigned long long time_t2renames;
 877         unsigned long long time_ffirst;
 878         unsigned long long time_fnext;
 879         unsigned long long time_fclose;
 880 #endif /* CONFIG_CIFS_STATS2 */
 881         __u64    bytes_read;
 882         __u64    bytes_written;
 883         spinlock_t stat_lock;
 884 #endif /* CONFIG_CIFS_STATS */
 885         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 886         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 887         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 888         bool ipc:1;             /* set if connection to IPC$ eg for RPC/PIPES */
 889         bool retry:1;
 890         bool nocase:1;
 891         bool seal:1;      /* transport encryption for this mounted share */
 892         bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 893                                 for this mount even if server would support */
 894         bool local_lease:1; /* check leases (only) on local system not remote */
 895         bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 896         bool broken_sparse_sup; /* if server or share does not support sparse */
 897         bool need_reconnect:1; /* connection reset, tid now invalid */
 898 #ifdef CONFIG_CIFS_SMB2
 899         bool print:1;           /* set if connection to printer share */
 900         bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
 901         __le32 capabilities;
 902         __u32 share_flags;
 903         __u32 maximal_access;
 904         __u32 vol_serial_number;
 905         __le64 vol_create_time;
 906         __u32 ss_flags;         /* sector size flags */
 907         __u32 perf_sector_size; /* best sector size for perf */
 908         __u32 max_chunks;
 909         __u32 max_bytes_chunk;
 910         __u32 max_bytes_copy;
 911 #endif /* CONFIG_CIFS_SMB2 */
 912 #ifdef CONFIG_CIFS_FSCACHE
 913         u64 resource_id;                /* server resource id */
 914         struct fscache_cookie *fscache; /* cookie for share */
 915 #endif
 916         struct list_head pending_opens; /* list of incomplete opens */
 917         /* BB add field for back pointer to sb struct(s)? */
 918 };
 919
 920 /*
 921  * This is a refcounted and timestamped container for a tcon pointer. The
 922  * container holds a tcon reference. It is considered safe to free one of
 923  * these when the tl_count goes to 0. The tl_time is the time of the last
 924  * "get" on the container.
 925  */
 926 struct tcon_link {
 927         struct rb_node          tl_rbnode;
 928         kuid_t                  tl_uid;
 929         unsigned long           tl_flags;
 930 #define TCON_LINK_MASTER        0
 931 #define TCON_LINK_PENDING       1
 932 #define TCON_LINK_IN_TREE       2
 933         unsigned long           tl_time;
 934         atomic_t                tl_count;
 935         struct cifs_tcon        *tl_tcon;
 936 };
 937
 938 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
 939
 940 static inline struct cifs_tcon *
 941 tlink_tcon(struct tcon_link *tlink)
 942 {
 943         return tlink->tl_tcon;
 944 }
 945
 946 extern void cifs_put_tlink(struct tcon_link *tlink);
 947
 948 static inline struct tcon_link *
 949 cifs_get_tlink(struct tcon_link *tlink)
 950 {
 951         if (tlink && !IS_ERR(tlink))
 952                 atomic_inc(&tlink->tl_count);
 953         return tlink;
 954 }
 955
 956 /* This function is always expected to succeed */
 957 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
 958
 959 #define CIFS_OPLOCK_NO_CHANGE 0xfe
 960
 961 struct cifs_pending_open {
 962         struct list_head olist;
 963         struct tcon_link *tlink;
 964         __u8 lease_key[16];
 965         __u32 oplock;
 966 };
 967
 968 /*
 969  * This info hangs off the cifsFileInfo structure, pointed to by llist.
 970  * This is used to track byte stream locks on the file
 971  */
 972 struct cifsLockInfo {
 973         struct list_head llist; /* pointer to next cifsLockInfo */
 974         struct list_head blist; /* pointer to locks blocked on this */
 975         wait_queue_head_t block_q;
 976         __u64 offset;
 977         __u64 length;
 978         __u32 pid;
 979         __u32 type;
 980 };
 981
 982 /*
 983  * One of these for each open instance of a file
 984  */
 985 struct cifs_search_info {
 986         loff_t index_of_last_entry;
 987         __u16 entries_in_buffer;
 988         __u16 info_level;
 989         __u32 resume_key;
 990         char *ntwrk_buf_start;
 991         char *srch_entries_start;
 992         char *last_entry;
 993         const char *presume_name;
 994         unsigned int resume_name_len;
 995         bool endOfSearch:1;
 996         bool emptyDir:1;
 997         bool unicode:1;
 998         bool smallBuf:1; /* so we know which buf_release function to call */
 999 };
1000
1001 struct cifs_open_parms {
1002         struct cifs_tcon *tcon;
1003         struct cifs_sb_info *cifs_sb;
1004         int disposition;
1005         int desired_access;
1006         int create_options;
1007         const char *path;
1008         struct cifs_fid *fid;
1009         bool reconnect:1;
1010 };
1011
1012 struct cifs_fid {
1013         __u16 netfid;
1014 #ifdef CONFIG_CIFS_SMB2
1015         __u64 persistent_fid;   /* persist file id for smb2 */
1016         __u64 volatile_fid;     /* volatile file id for smb2 */
1017         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for smb2 */
1018 #endif
1019         struct cifs_pending_open *pending_open;
1020         unsigned int epoch;
1021         bool purge_cache;
1022 };
1023
1024 struct cifs_fid_locks {
1025         struct list_head llist;
1026         struct cifsFileInfo *cfile;     /* fid that owns locks */
1027         struct list_head locks;         /* locks held by fid above */
1028 };
1029
1030 struct cifsFileInfo {
1031         struct list_head tlist; /* pointer to next fid owned by tcon */
1032         struct list_head flist; /* next fid (file instance) for this inode */
1033         struct cifs_fid_locks *llist;   /* brlocks held by this fid */
1034         kuid_t uid;             /* allows finding which FileInfo structure */
1035         __u32 pid;              /* process id who opened file */
1036         struct cifs_fid fid;    /* file id from remote */
1037         /* BB add lock scope info here if needed */ ;
1038         /* lock scope id (0 if none) */
1039         struct dentry *dentry;
1040         unsigned int f_flags;
1041         struct tcon_link *tlink;
1042         bool invalidHandle:1;   /* file closed via session abend */
1043         bool oplock_break_cancelled:1;
1044         int count;              /* refcount protected by cifs_file_list_lock */
1045         struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1046         struct cifs_search_info srch_inf;
1047         struct work_struct oplock_break; /* work for oplock breaks */
1048 };
1049
1050 struct cifs_io_parms {
1051         __u16 netfid;
1052 #ifdef CONFIG_CIFS_SMB2
1053         __u64 persistent_fid;   /* persist file id for smb2 */
1054         __u64 volatile_fid;     /* volatile file id for smb2 */
1055 #endif
1056         __u32 pid;
1057         __u64 offset;
1058         unsigned int length;
1059         struct cifs_tcon *tcon;
1060 };
1061
1062 struct cifs_readdata;
1063
1064 /* asynchronous read support */
1065 struct cifs_readdata {
1066         struct kref                     refcount;
1067         struct list_head                list;
1068         struct completion               done;
1069         struct cifsFileInfo             *cfile;
1070         struct address_space            *mapping;
1071         __u64                           offset;
1072         unsigned int                    bytes;
1073         unsigned int                    got_bytes;
1074         pid_t                           pid;
1075         int                             result;
1076         struct work_struct              work;
1077         int (*read_into_pages)(struct TCP_Server_Info *server,
1078                                 struct cifs_readdata *rdata,
1079                                 unsigned int len);
1080         struct kvec                     iov;
1081         unsigned int                    pagesz;
1082         unsigned int                    tailsz;
1083         unsigned int                    credits;
1084         unsigned int                    nr_pages;
1085         struct page                     *pages[];
1086 };
1087
1088 struct cifs_writedata;
1089
1090 /* asynchronous write support */
1091 struct cifs_writedata {
1092         struct kref                     refcount;
1093         struct list_head                list;
1094         struct completion               done;
1095         enum writeback_sync_modes       sync_mode;
1096         struct work_struct              work;
1097         struct cifsFileInfo             *cfile;
1098         __u64                           offset;
1099         pid_t                           pid;
1100         unsigned int                    bytes;
1101         int                             result;
1102         unsigned int                    pagesz;
1103         unsigned int                    tailsz;
1104         unsigned int                    credits;
1105         unsigned int                    nr_pages;
1106         struct page                     *pages[];
1107 };
1108
1109 /*
1110  * Take a reference on the file private data. Must be called with
1111  * cifs_file_list_lock held.
1112  */
1113 static inline void
1114 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1115 {
1116         ++cifs_file->count;
1117 }
1118
1119 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1120 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1121
1122 #define CIFS_CACHE_READ_FLG     1
1123 #define CIFS_CACHE_HANDLE_FLG   2
1124 #define CIFS_CACHE_RH_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1125 #define CIFS_CACHE_WRITE_FLG    4
1126 #define CIFS_CACHE_RW_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1127 #define CIFS_CACHE_RHW_FLG      (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1128
1129 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1130 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1131 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1132
1133 /*
1134  * One of these for each file inode
1135  */
1136
1137 struct cifsInodeInfo {
1138         bool can_cache_brlcks;
1139         struct list_head llist; /* locks helb by this inode */
1140         struct rw_semaphore lock_sem;   /* protect the fields above */
1141         /* BB add in lists for dirty pages i.e. write caching info for oplock */
1142         struct list_head openFileList;
1143         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1144         unsigned int oplock;            /* oplock/lease level we have */
1145         unsigned int epoch;             /* used to track lease state changes */
1146 #define CIFS_INODE_PENDING_OPLOCK_BREAK   (0) /* oplock break in progress */
1147 #define CIFS_INODE_PENDING_WRITERS        (1) /* Writes in progress */
1148 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1149 #define CIFS_INO_DELETE_PENDING           (3) /* delete pending on server */
1150 #define CIFS_INO_INVALID_MAPPING          (4) /* pagecache is invalid */
1151 #define CIFS_INO_LOCK                     (5) /* lock bit for synchronization */
1152         unsigned long flags;
1153         spinlock_t writers_lock;
1154         unsigned int writers;           /* Number of writers on this inode */
1155         unsigned long time;             /* jiffies of last update of inode */
1156         u64  server_eof;                /* current file size on server -- protected by i_lock */
1157         u64  uniqueid;                  /* server inode number */
1158         u64  createtime;                /* creation time on server */
1159 #ifdef CONFIG_CIFS_SMB2
1160         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for this inode */
1161 #endif
1162 #ifdef CONFIG_CIFS_FSCACHE
1163         struct fscache_cookie *fscache;
1164 #endif
1165         struct inode vfs_inode;
1166 };
1167
1168 static inline struct cifsInodeInfo *
1169 CIFS_I(struct inode *inode)
1170 {
1171         return container_of(inode, struct cifsInodeInfo, vfs_inode);
1172 }
1173
1174 static inline struct cifs_sb_info *
1175 CIFS_SB(struct super_block *sb)
1176 {
1177         return sb->s_fs_info;
1178 }
1179
1180 static inline struct cifs_sb_info *
1181 CIFS_FILE_SB(struct file *file)
1182 {
1183         return CIFS_SB(file_inode(file)->i_sb);
1184 }
1185
1186 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1187 {
1188         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1189                 return '/';
1190         else
1191                 return '\\';
1192 }
1193
1194 static inline void
1195 convert_delimiter(char *path, char delim)
1196 {
1197         char old_delim, *pos;
1198
1199         if (delim == '/')
1200                 old_delim = '\\';
1201         else
1202                 old_delim = '/';
1203
1204         pos = path;
1205         while ((pos = strchr(pos, old_delim)))
1206                 *pos = delim;
1207 }
1208
1209 #ifdef CONFIG_CIFS_STATS
1210 #define cifs_stats_inc atomic_inc
1211
1212 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1213                                             unsigned int bytes)
1214 {
1215         if (bytes) {
1216                 spin_lock(&tcon->stat_lock);
1217                 tcon->bytes_written += bytes;
1218                 spin_unlock(&tcon->stat_lock);
1219         }
1220 }
1221
1222 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1223                                          unsigned int bytes)
1224 {
1225         spin_lock(&tcon->stat_lock);
1226         tcon->bytes_read += bytes;
1227         spin_unlock(&tcon->stat_lock);
1228 }
1229 #else
1230
1231 #define  cifs_stats_inc(field) do {} while (0)
1232 #define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1233 #define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1234
1235 #endif
1236
1237
1238 /*
1239  * This is the prototype for the mid receive function. This function is for
1240  * receiving the rest of the SMB frame, starting with the WordCount (which is
1241  * just after the MID in struct smb_hdr). Note:
1242  *
1243  * - This will be called by cifsd, with no locks held.
1244  * - The mid will still be on the pending_mid_q.
1245  * - mid->resp_buf will point to the current buffer.
1246  *
1247  * Returns zero on a successful receive, or an error. The receive state in
1248  * the TCP_Server_Info will also be updated.
1249  */
1250 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1251                             struct mid_q_entry *mid);
1252
1253 /*
1254  * This is the prototype for the mid callback function. This is called once the
1255  * mid has been received off of the socket. When creating one, take special
1256  * care to avoid deadlocks. Things to bear in mind:
1257  *
1258  * - it will be called by cifsd, with no locks held
1259  * - the mid will be removed from any lists
1260  */
1261 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1262
1263 /* one of these for every pending CIFS request to the server */
1264 struct mid_q_entry {
1265         struct list_head qhead; /* mids waiting on reply from this server */
1266         struct TCP_Server_Info *server; /* server corresponding to this mid */
1267         __u64 mid;              /* multiplex id */
1268         __u32 pid;              /* process id */
1269         __u32 sequence_number;  /* for CIFS signing */
1270         unsigned long when_alloc;  /* when mid was created */
1271 #ifdef CONFIG_CIFS_STATS2
1272         unsigned long when_sent; /* time when smb send finished */
1273         unsigned long when_received; /* when demux complete (taken off wire) */
1274 #endif
1275         mid_receive_t *receive; /* call receive callback */
1276         mid_callback_t *callback; /* call completion callback */
1277         void *callback_data;      /* general purpose pointer for callback */
1278         void *resp_buf;         /* pointer to received SMB header */
1279         int mid_state;  /* wish this were enum but can not pass to wait_event */
1280         __le16 command;         /* smb command code */
1281         bool large_buf:1;       /* if valid response, is pointer to large buf */
1282         bool multiRsp:1;        /* multiple trans2 responses for one request  */
1283         bool multiEnd:1;        /* both received */
1284 };
1285
1286 /*      Make code in transport.c a little cleaner by moving
1287         update of optional stats into function below */
1288 #ifdef CONFIG_CIFS_STATS2
1289
1290 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1291 {
1292         atomic_inc(&server->in_send);
1293 }
1294
1295 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1296 {
1297         atomic_dec(&server->in_send);
1298 }
1299
1300 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1301 {
1302         atomic_inc(&server->num_waiters);
1303 }
1304
1305 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1306 {
1307         atomic_dec(&server->num_waiters);
1308 }
1309
1310 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1311 {
1312         mid->when_sent = jiffies;
1313 }
1314 #else
1315 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1316 {
1317 }
1318 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1319 {
1320 }
1321
1322 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1323 {
1324 }
1325
1326 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1327 {
1328 }
1329
1330 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1331 {
1332 }
1333 #endif
1334
1335 /* for pending dnotify requests */
1336 struct dir_notify_req {
1337         struct list_head lhead;
1338         __le16 Pid;
1339         __le16 PidHigh;
1340         __u16 Mid;
1341         __u16 Tid;
1342         __u16 Uid;
1343         __u16 netfid;
1344         __u32 filter; /* CompletionFilter (for multishot) */
1345         int multishot;
1346         struct file *pfile;
1347 };
1348
1349 struct dfs_info3_param {
1350         int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1351         int path_consumed;
1352         int server_type;
1353         int ref_flag;
1354         char *path_name;
1355         char *node_name;
1356 };
1357
1358 /*
1359  * common struct for holding inode info when searching for or updating an
1360  * inode with new info
1361  */
1362
1363 #define CIFS_FATTR_DFS_REFERRAL         0x1
1364 #define CIFS_FATTR_DELETE_PENDING       0x2
1365 #define CIFS_FATTR_NEED_REVAL           0x4
1366 #define CIFS_FATTR_INO_COLLISION        0x8
1367 #define CIFS_FATTR_UNKNOWN_NLINK        0x10
1368
1369 struct cifs_fattr {
1370         u32             cf_flags;
1371         u32             cf_cifsattrs;
1372         u64             cf_uniqueid;
1373         u64             cf_eof;
1374         u64             cf_bytes;
1375         u64             cf_createtime;
1376         kuid_t          cf_uid;
1377         kgid_t          cf_gid;
1378         umode_t         cf_mode;
1379         dev_t           cf_rdev;
1380         unsigned int    cf_nlink;
1381         unsigned int    cf_dtype;
1382         struct timespec cf_atime;
1383         struct timespec cf_mtime;
1384         struct timespec cf_ctime;
1385 };
1386
1387 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1388 {
1389         if (param) {
1390                 kfree(param->path_name);
1391                 kfree(param->node_name);
1392                 kfree(param);
1393         }
1394 }
1395
1396 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1397                                        int number_of_items)
1398 {
1399         int i;
1400         if ((number_of_items == 0) || (param == NULL))
1401                 return;
1402         for (i = 0; i < number_of_items; i++) {
1403                 kfree(param[i].path_name);
1404                 kfree(param[i].node_name);
1405         }
1406         kfree(param);
1407 }
1408
1409 #define   MID_FREE 0
1410 #define   MID_REQUEST_ALLOCATED 1
1411 #define   MID_REQUEST_SUBMITTED 2
1412 #define   MID_RESPONSE_RECEIVED 4
1413 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
1414 #define   MID_RESPONSE_MALFORMED 0x10
1415 #define   MID_SHUTDOWN           0x20
1416
1417 /* Types of response buffer returned from SendReceive2 */
1418 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
1419 #define   CIFS_SMALL_BUFFER     1
1420 #define   CIFS_LARGE_BUFFER     2
1421 #define   CIFS_IOVEC            4    /* array of response buffers */
1422
1423 /* Type of Request to SendReceive2 */
1424 #define   CIFS_BLOCKING_OP      1    /* operation can block */
1425 #define   CIFS_ASYNC_OP         2    /* do not wait for response */
1426 #define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
1427 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
1428 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
1429 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
1430
1431 /* Type of request operation */
1432 #define   CIFS_ECHO_OP      0x080    /* echo request */
1433 #define   CIFS_OBREAK_OP   0x0100    /* oplock break request */
1434 #define   CIFS_NEG_OP      0x0200    /* negotiate request */
1435 #define   CIFS_OP_MASK     0x0380    /* mask request type */
1436 #define   CIFS_HAS_CREDITS 0x0400    /* already has credits */
1437
1438 /* Security Flags: indicate type of session setup needed */
1439 #define   CIFSSEC_MAY_SIGN      0x00001
1440 #define   CIFSSEC_MAY_NTLM      0x00002
1441 #define   CIFSSEC_MAY_NTLMV2    0x00004
1442 #define   CIFSSEC_MAY_KRB5      0x00008
1443 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1444 #define   CIFSSEC_MAY_LANMAN    0x00010
1445 #define   CIFSSEC_MAY_PLNTXT    0x00020
1446 #else
1447 #define   CIFSSEC_MAY_LANMAN    0
1448 #define   CIFSSEC_MAY_PLNTXT    0
1449 #endif /* weak passwords */
1450 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
1451 #define   CIFSSEC_MAY_NTLMSSP   0x00080 /* raw ntlmssp with ntlmv2 */
1452
1453 #define   CIFSSEC_MUST_SIGN     0x01001
1454 /* note that only one of the following can be set so the
1455 result of setting MUST flags more than once will be to
1456 require use of the stronger protocol */
1457 #define   CIFSSEC_MUST_NTLM     0x02002
1458 #define   CIFSSEC_MUST_NTLMV2   0x04004
1459 #define   CIFSSEC_MUST_KRB5     0x08008
1460 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1461 #define   CIFSSEC_MUST_LANMAN   0x10010
1462 #define   CIFSSEC_MUST_PLNTXT   0x20020
1463 #ifdef CONFIG_CIFS_UPCALL
1464 #define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
1465 #else
1466 #define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
1467 #endif /* UPCALL */
1468 #else /* do not allow weak pw hash */
1469 #define   CIFSSEC_MUST_LANMAN   0
1470 #define   CIFSSEC_MUST_PLNTXT   0
1471 #ifdef CONFIG_CIFS_UPCALL
1472 #define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
1473 #else
1474 #define   CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
1475 #endif /* UPCALL */
1476 #endif /* WEAK_PW_HASH */
1477 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
1478 #define   CIFSSEC_MUST_NTLMSSP  0x80080 /* raw ntlmssp with ntlmv2 */
1479
1480 #define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1481 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1482 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1483 /*
1484  *****************************************************************
1485  * All constants go here
1486  *****************************************************************
1487  */
1488
1489 #define UID_HASH (16)
1490
1491 /*
1492  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1493  * following to be declared.
1494  */
1495
1496 /****************************************************************************
1497  *  Locking notes.  All updates to global variables and lists should be
1498  *                  protected by spinlocks or semaphores.
1499  *
1500  *  Spinlocks
1501  *  ---------
1502  *  GlobalMid_Lock protects:
1503  *      list operations on pending_mid_q and oplockQ
1504  *      updates to XID counters, multiplex id  and SMB sequence numbers
1505  *  cifs_file_list_lock protects:
1506  *      list operations on tcp and SMB session lists and tCon lists
1507  *  f_owner.lock protects certain per file struct operations
1508  *  mapping->page_lock protects certain per page operations
1509  *
1510  *  Semaphores
1511  *  ----------
1512  *  sesSem     operations on smb session
1513  *  tconSem    operations on tree connection
1514  *  fh_sem      file handle reconnection operations
1515  *
1516  ****************************************************************************/
1517
1518 #ifdef DECLARE_GLOBALS_HERE
1519 #define GLOBAL_EXTERN
1520 #else
1521 #define GLOBAL_EXTERN extern
1522 #endif
1523
1524 /*
1525  * the list of TCP_Server_Info structures, ie each of the sockets
1526  * connecting our client to a distinct server (ip address), is
1527  * chained together by cifs_tcp_ses_list. The list of all our SMB
1528  * sessions (and from that the tree connections) can be found
1529  * by iterating over cifs_tcp_ses_list
1530  */
1531 GLOBAL_EXTERN struct list_head          cifs_tcp_ses_list;
1532
1533 /*
1534  * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1535  * tcp session, and the list of tcon's per smb session. It also protects
1536  * the reference counters for the server, smb session, and tcon. Finally,
1537  * changes to the tcon->tidStatus should be done while holding this lock.
1538  */
1539 GLOBAL_EXTERN spinlock_t                cifs_tcp_ses_lock;
1540
1541 /*
1542  * This lock protects the cifs_file->llist and cifs_file->flist
1543  * list operations, and updates to some flags (cifs_file->invalidHandle)
1544  * It will be moved to either use the tcon->stat_lock or equivalent later.
1545  * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1546  * the cifs_tcp_ses_lock must be grabbed first and released last.
1547  */
1548 GLOBAL_EXTERN spinlock_t        cifs_file_list_lock;
1549
1550 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1551 /* Outstanding dir notify requests */
1552 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1553 /* DirNotify response queue */
1554 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1555 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1556
1557 /*
1558  * Global transaction id (XID) information
1559  */
1560 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
1561 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1562 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
1563 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
1564                                           /* on midQ entries */
1565 /*
1566  *  Global counters, updated atomically
1567  */
1568 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1569 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1570 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1571 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1572 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1573
1574 /* Various Debug counters */
1575 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
1576 #ifdef CONFIG_CIFS_STATS2
1577 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1578 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1579 #endif
1580 GLOBAL_EXTERN atomic_t smBufAllocCount;
1581 GLOBAL_EXTERN atomic_t midCount;
1582
1583 /* Misc globals */
1584 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1585 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1586 GLOBAL_EXTERN unsigned int global_secflags;     /* if on, session setup sent
1587                                 with more secure ntlmssp2 challenge/resp */
1588 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
1589 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1590 GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
1591 GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
1592 GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
1593 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1594
1595 #ifdef CONFIG_CIFS_ACL
1596 GLOBAL_EXTERN struct rb_root uidtree;
1597 GLOBAL_EXTERN struct rb_root gidtree;
1598 GLOBAL_EXTERN spinlock_t siduidlock;
1599 GLOBAL_EXTERN spinlock_t sidgidlock;
1600 GLOBAL_EXTERN struct rb_root siduidtree;
1601 GLOBAL_EXTERN struct rb_root sidgidtree;
1602 GLOBAL_EXTERN spinlock_t uidsidlock;
1603 GLOBAL_EXTERN spinlock_t gidsidlock;
1604 #endif /* CONFIG_CIFS_ACL */
1605
1606 void cifs_oplock_break(struct work_struct *work);
1607
1608 extern const struct slow_work_ops cifs_oplock_break_ops;
1609 extern struct workqueue_struct *cifsiod_wq;
1610
1611 extern mempool_t *cifs_mid_poolp;
1612
1613 /* Operations for different SMB versions */
1614 #define SMB1_VERSION_STRING     "1.0"
1615 extern struct smb_version_operations smb1_operations;
1616 extern struct smb_version_values smb1_values;
1617 #define SMB20_VERSION_STRING    "2.0"
1618 extern struct smb_version_operations smb20_operations;
1619 extern struct smb_version_values smb20_values;
1620 #define SMB21_VERSION_STRING    "2.1"
1621 extern struct smb_version_operations smb21_operations;
1622 extern struct smb_version_values smb21_values;
1623 #define SMB30_VERSION_STRING    "3.0"
1624 extern struct smb_version_operations smb30_operations;
1625 extern struct smb_version_values smb30_values;
1626 #define SMB302_VERSION_STRING   "3.02"
1627 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1628 extern struct smb_version_values smb302_values;
1629 #define SMB311_VERSION_STRING   "3.1.1"
1630 #define ALT_SMB311_VERSION_STRING "3.11"
1631 extern struct smb_version_operations smb311_operations;
1632 extern struct smb_version_values smb311_values;
1633 #endif  /* _CIFS_GLOB_H */