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 /* echo interval in seconds */
  74 #define SMB_ECHO_INTERVAL_MIN 1
  75 #define SMB_ECHO_INTERVAL_MAX 600
  76 #define SMB_ECHO_INTERVAL_DEFAULT 60
  77
  78 /*
  79  * Default number of credits to keep available for SMB3.
  80  * This value is chosen somewhat arbitrarily. The Windows client
  81  * defaults to 128 credits, the Windows server allows clients up to
  82  * 512 credits (or 8K for later versions), and the NetApp server
  83  * does not limit clients at all.  Choose a high enough default value
  84  * such that the client shouldn't limit performance, but allow mount
  85  * to override (until you approach 64K, where we limit credits to 65000
  86  * to reduce possibility of seeing more server credit overflow bugs.
  87  */
  88 #define SMB2_MAX_CREDITS_AVAILABLE 32000
  89
  90 #include "cifspdu.h"
  91
  92 #ifndef XATTR_DOS_ATTRIB
  93 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  94 #endif
  95
  96 /*
  97  * CIFS vfs client Status information (based on what we know.)
  98  */
  99
 100 /* associated with each tcp and smb session */
 101 enum statusEnum {
 102         CifsNew = 0,
 103         CifsGood,
 104         CifsExiting,
 105         CifsNeedReconnect,
 106         CifsNeedNegotiate
 107 };
 108
 109 enum securityEnum {
 110         Unspecified = 0,        /* not specified */
 111         LANMAN,                 /* Legacy LANMAN auth */
 112         NTLM,                   /* Legacy NTLM012 auth with NTLM hash */
 113         NTLMv2,                 /* Legacy NTLM auth with NTLMv2 hash */
 114         RawNTLMSSP,             /* NTLMSSP without SPNEGO, NTLMv2 hash */
 115         Kerberos,               /* Kerberos via SPNEGO */
 116 };
 117
 118 struct session_key {
 119         unsigned int len;
 120         char *response;
 121 };
 122
 123 /* crypto security descriptor definition */
 124 struct sdesc {
 125         struct shash_desc shash;
 126         char ctx[];
 127 };
 128
 129 /* crypto hashing related structure/fields, not specific to a sec mech */
 130 struct cifs_secmech {
 131         struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
 132         struct crypto_shash *md5; /* md5 hash function */
 133         struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
 134         struct crypto_shash *cmacaes; /* block-cipher based MAC function */
 135         struct sdesc *sdeschmacmd5;  /* ctxt to generate ntlmv2 hash, CR1 */
 136         struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
 137         struct sdesc *sdeschmacsha256;  /* ctxt to generate smb2 signature */
 138         struct sdesc *sdesccmacaes;  /* ctxt to generate smb3 signature */
 139         struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
 140         struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
 141 };
 142
 143 /* per smb session structure/fields */
 144 struct ntlmssp_auth {
 145         bool sesskey_per_smbsess; /* whether session key is per smb session */
 146         __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
 147         __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
 148         unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
 149         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
 150 };
 151
 152 struct cifs_cred {
 153         int uid;
 154         int gid;
 155         int mode;
 156         int cecount;
 157         struct cifs_sid osid;
 158         struct cifs_sid gsid;
 159         struct cifs_ntace *ntaces;
 160         struct cifs_ace *aces;
 161 };
 162
 163 /*
 164  *****************************************************************
 165  * Except the CIFS PDUs themselves all the
 166  * globally interesting structs should go here
 167  *****************************************************************
 168  */
 169
 170 /*
 171  * A smb_rqst represents a complete request to be issued to a server. It's
 172  * formed by a kvec array, followed by an array of pages. Page data is assumed
 173  * to start at the beginning of the first page.
 174  */
 175 struct smb_rqst {
 176         struct kvec     *rq_iov;        /* array of kvecs */
 177         unsigned int    rq_nvec;        /* number of kvecs in array */
 178         struct page     **rq_pages;     /* pointer to array of page ptrs */
 179         unsigned int    rq_npages;      /* number pages in array */
 180         unsigned int    rq_pagesz;      /* page size to use */
 181         unsigned int    rq_tailsz;      /* length of last page */
 182 };
 183
 184 enum smb_version {
 185         Smb_1 = 1,
 186         Smb_20,
 187         Smb_21,
 188         Smb_30,
 189         Smb_302,
 190 #ifdef CONFIG_CIFS_SMB311
 191         Smb_311,
 192 #endif /* SMB311 */
 193         Smb_version_err
 194 };
 195
 196 struct mid_q_entry;
 197 struct TCP_Server_Info;
 198 struct cifsFileInfo;
 199 struct cifs_ses;
 200 struct cifs_tcon;
 201 struct dfs_info3_param;
 202 struct cifs_fattr;
 203 struct smb_vol;
 204 struct cifs_fid;
 205 struct cifs_readdata;
 206 struct cifs_writedata;
 207 struct cifs_io_parms;
 208 struct cifs_search_info;
 209 struct cifsInodeInfo;
 210 struct cifs_open_parms;
 211
 212 struct smb_version_operations {
 213         int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
 214                            struct mid_q_entry *);
 215         bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
 216         /* setup request: allocate mid, sign message */
 217         struct mid_q_entry *(*setup_request)(struct cifs_ses *,
 218                                                 struct smb_rqst *);
 219         /* setup async request: allocate mid, sign message */
 220         struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
 221                                                 struct smb_rqst *);
 222         /* check response: verify signature, map error */
 223         int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
 224                              bool);
 225         void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
 226                             const int);
 227         void (*set_credits)(struct TCP_Server_Info *, const int);
 228         int * (*get_credits_field)(struct TCP_Server_Info *, const int);
 229         unsigned int (*get_credits)(struct mid_q_entry *);
 230         __u64 (*get_next_mid)(struct TCP_Server_Info *);
 231         /* data offset from read response message */
 232         unsigned int (*read_data_offset)(char *);
 233         /* data length from read response message */
 234         unsigned int (*read_data_length)(char *);
 235         /* map smb to linux error */
 236         int (*map_error)(char *, bool);
 237         /* find mid corresponding to the response message */
 238         struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
 239         void (*dump_detail)(void *);
 240         void (*clear_stats)(struct cifs_tcon *);
 241         void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
 242         void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
 243         /* verify the message */
 244         int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
 245         bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
 246         int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
 247         void (*downgrade_oplock)(struct TCP_Server_Info *,
 248                                         struct cifsInodeInfo *, bool);
 249         /* process transaction2 response */
 250         bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
 251                              char *, int);
 252         /* check if we need to negotiate */
 253         bool (*need_neg)(struct TCP_Server_Info *);
 254         /* negotiate to the server */
 255         int (*negotiate)(const unsigned int, struct cifs_ses *);
 256         /* set negotiated write size */
 257         unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
 258         /* set negotiated read size */
 259         unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
 260         /* setup smb sessionn */
 261         int (*sess_setup)(const unsigned int, struct cifs_ses *,
 262                           const struct nls_table *);
 263         /* close smb session */
 264         int (*logoff)(const unsigned int, struct cifs_ses *);
 265         /* connect to a server share */
 266         int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
 267                             struct cifs_tcon *, const struct nls_table *);
 268         /* close tree connecion */
 269         int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
 270         /* get DFS referrals */
 271         int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
 272                              const char *, struct dfs_info3_param **,
 273                              unsigned int *, const struct nls_table *, int);
 274         /* informational QFS call */
 275         void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
 276         /* check if a path is accessible or not */
 277         int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
 278                                   struct cifs_sb_info *, const char *);
 279         /* query path data from the server */
 280         int (*query_path_info)(const unsigned int, struct cifs_tcon *,
 281                                struct cifs_sb_info *, const char *,
 282                                FILE_ALL_INFO *, bool *, bool *);
 283         /* query file data from the server */
 284         int (*query_file_info)(const unsigned int, struct cifs_tcon *,
 285                                struct cifs_fid *, FILE_ALL_INFO *);
 286         /* get server index number */
 287         int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
 288                             struct cifs_sb_info *, const char *,
 289                             u64 *uniqueid, FILE_ALL_INFO *);
 290         /* set size by path */
 291         int (*set_path_size)(const unsigned int, struct cifs_tcon *,
 292                              const char *, __u64, struct cifs_sb_info *, bool);
 293         /* set size by file handle */
 294         int (*set_file_size)(const unsigned int, struct cifs_tcon *,
 295                              struct cifsFileInfo *, __u64, bool);
 296         /* set attributes */
 297         int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
 298                              const unsigned int);
 299         int (*set_compression)(const unsigned int, struct cifs_tcon *,
 300                                struct cifsFileInfo *);
 301         /* check if we can send an echo or nor */
 302         bool (*can_echo)(struct TCP_Server_Info *);
 303         /* send echo request */
 304         int (*echo)(struct TCP_Server_Info *);
 305         /* create directory */
 306         int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
 307                      struct cifs_sb_info *);
 308         /* set info on created directory */
 309         void (*mkdir_setinfo)(struct inode *, const char *,
 310                               struct cifs_sb_info *, struct cifs_tcon *,
 311                               const unsigned int);
 312         /* remove directory */
 313         int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
 314                      struct cifs_sb_info *);
 315         /* unlink file */
 316         int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
 317                       struct cifs_sb_info *);
 318         /* open, rename and delete file */
 319         int (*rename_pending_delete)(const char *, struct dentry *,
 320                                      const unsigned int);
 321         /* send rename request */
 322         int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
 323                       const char *, struct cifs_sb_info *);
 324         /* send create hardlink request */
 325         int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
 326                                const char *, const char *,
 327                                struct cifs_sb_info *);
 328         /* query symlink target */
 329         int (*query_symlink)(const unsigned int, struct cifs_tcon *,
 330                              const char *, char **, struct cifs_sb_info *);
 331         /* open a file for non-posix mounts */
 332         int (*open)(const unsigned int, struct cifs_open_parms *,
 333                     __u32 *, FILE_ALL_INFO *);
 334         /* set fid protocol-specific info */
 335         void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
 336         /* close a file */
 337         void (*close)(const unsigned int, struct cifs_tcon *,
 338                       struct cifs_fid *);
 339         /* send a flush request to the server */
 340         int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
 341         /* async read from the server */
 342         int (*async_readv)(struct cifs_readdata *);
 343         /* async write to the server */
 344         int (*async_writev)(struct cifs_writedata *,
 345                             void (*release)(struct kref *));
 346         /* sync read from the server */
 347         int (*sync_read)(const unsigned int, struct cifs_fid *,
 348                          struct cifs_io_parms *, unsigned int *, char **,
 349                          int *);
 350         /* sync write to the server */
 351         int (*sync_write)(const unsigned int, struct cifs_fid *,
 352                           struct cifs_io_parms *, unsigned int *, struct kvec *,
 353                           unsigned long);
 354         /* open dir, start readdir */
 355         int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
 356                                const char *, struct cifs_sb_info *,
 357                                struct cifs_fid *, __u16,
 358                                struct cifs_search_info *);
 359         /* continue readdir */
 360         int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
 361                               struct cifs_fid *,
 362                               __u16, struct cifs_search_info *srch_inf);
 363         /* close dir */
 364         int (*close_dir)(const unsigned int, struct cifs_tcon *,
 365                          struct cifs_fid *);
 366         /* calculate a size of SMB message */
 367         unsigned int (*calc_smb_size)(void *);
 368         /* check for STATUS_PENDING and process it in a positive case */
 369         bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
 370         /* send oplock break response */
 371         int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
 372                                struct cifsInodeInfo *);
 373         /* query remote filesystem */
 374         int (*queryfs)(const unsigned int, struct cifs_tcon *,
 375                        struct kstatfs *);
 376         /* send mandatory brlock to the server */
 377         int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
 378                          __u64, __u32, int, int, bool);
 379         /* unlock range of mandatory locks */
 380         int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
 381                                  const unsigned int);
 382         /* push brlocks from the cache to the server */
 383         int (*push_mand_locks)(struct cifsFileInfo *);
 384         /* get lease key of the inode */
 385         void (*get_lease_key)(struct inode *, struct cifs_fid *);
 386         /* set lease key of the inode */
 387         void (*set_lease_key)(struct inode *, struct cifs_fid *);
 388         /* generate new lease key */
 389         void (*new_lease_key)(struct cifs_fid *);
 390         int (*generate_signingkey)(struct cifs_ses *);
 391         int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
 392         int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
 393                              struct cifsFileInfo *src_file);
 394         int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
 395                              struct cifsFileInfo *src_file, void __user *);
 396         int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
 397                                 struct cifs_sb_info *, const unsigned char *,
 398                                 char *, unsigned int *);
 399         int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
 400                                  struct cifs_sb_info *, const unsigned char *,
 401                                  char *, unsigned int *);
 402         /* if we can do cache read operations */
 403         bool (*is_read_op)(__u32);
 404         /* set oplock level for the inode */
 405         void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
 406                                  bool *);
 407         /* create lease context buffer for CREATE request */
 408         char * (*create_lease_buf)(u8 *, u8);
 409         /* parse lease context buffer and return oplock/epoch info */
 410         __u8 (*parse_lease_buf)(void *, unsigned int *);
 411         ssize_t (*copychunk_range)(const unsigned int,
 412                         struct cifsFileInfo *src_file,
 413                         struct cifsFileInfo *target_file,
 414                         u64 src_off, u64 len, u64 dest_off);
 415         int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
 416                         struct cifsFileInfo *target_file, u64 src_off, u64 len,
 417                         u64 dest_off);
 418         int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
 419         ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
 420                         const unsigned char *, const unsigned char *, char *,
 421                         size_t, const struct nls_table *, int);
 422         int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
 423                         const char *, const void *, const __u16,
 424                         const struct nls_table *, int);
 425         struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
 426                         const char *, u32 *);
 427         struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
 428                         const struct cifs_fid *, u32 *);
 429         int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
 430                         int);
 431         /* writepages retry size */
 432         unsigned int (*wp_retry_size)(struct inode *);
 433         /* get mtu credits */
 434         int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
 435                                 unsigned int *, unsigned int *);
 436         /* check if we need to issue closedir */
 437         bool (*dir_needs_close)(struct cifsFileInfo *);
 438         long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
 439                           loff_t);
 440         /* init transform request - used for encryption for now */
 441         int (*init_transform_rq)(struct TCP_Server_Info *, struct smb_rqst *,
 442                                  struct smb_rqst *);
 443         /* free transform request */
 444         void (*free_transform_rq)(struct smb_rqst *);
 445         int (*is_transform_hdr)(void *buf);
 446         int (*receive_transform)(struct TCP_Server_Info *,
 447                                  struct mid_q_entry **);
 448         enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
 449                             enum securityEnum);
 450
 451 };
 452
 453 struct smb_version_values {
 454         char            *version_string;
 455         __u16           protocol_id;
 456         __u32           req_capabilities;
 457         __u32           large_lock_type;
 458         __u32           exclusive_lock_type;
 459         __u32           shared_lock_type;
 460         __u32           unlock_lock_type;
 461         size_t          header_size;
 462         size_t          max_header_size;
 463         size_t          read_rsp_size;
 464         __le16          lock_cmd;
 465         unsigned int    cap_unix;
 466         unsigned int    cap_nt_find;
 467         unsigned int    cap_large_files;
 468         __u16           signing_enabled;
 469         __u16           signing_required;
 470         size_t          create_lease_size;
 471 };
 472
 473 #define HEADER_SIZE(server) (server->vals->header_size)
 474 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
 475
 476 struct smb_vol {
 477         char *username;
 478         char *password;
 479         char *domainname;
 480         char *UNC;
 481         char *iocharset;  /* local code page for mapping to and from Unicode */
 482         char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
 483         char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
 484         kuid_t cred_uid;
 485         kuid_t linux_uid;
 486         kgid_t linux_gid;
 487         kuid_t backupuid;
 488         kgid_t backupgid;
 489         umode_t file_mode;
 490         umode_t dir_mode;
 491         enum securityEnum sectype; /* sectype requested via mnt opts */
 492         bool sign; /* was signing requested via mnt opts? */
 493         bool retry:1;
 494         bool intr:1;
 495         bool setuids:1;
 496         bool setuidfromacl:1;
 497         bool override_uid:1;
 498         bool override_gid:1;
 499         bool dynperm:1;
 500         bool noperm:1;
 501         bool no_psx_acl:1; /* set if posix acl support should be disabled */
 502         bool cifs_acl:1;
 503         bool backupuid_specified; /* mount option  backupuid  is specified */
 504         bool backupgid_specified; /* mount option  backupgid  is specified */
 505         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
 506         bool server_ino:1; /* use inode numbers from server ie UniqueId */
 507         bool direct_io:1;
 508         bool strict_io:1; /* strict cache behavior */
 509         bool remap:1;      /* set to remap seven reserved chars in filenames */
 510         bool sfu_remap:1;  /* remap seven reserved chars ala SFU */
 511         bool posix_paths:1; /* unset to not ask for posix pathnames. */
 512         bool no_linux_ext:1;
 513         bool sfu_emul:1;
 514         bool nullauth:1;   /* attempt to authenticate with null user */
 515         bool nocase:1;     /* request case insensitive filenames */
 516         bool nobrl:1;      /* disable sending byte range locks to srv */
 517         bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
 518         bool seal:1;       /* request transport encryption on share */
 519         bool nodfs:1;      /* Do not request DFS, even if available */
 520         bool local_lease:1; /* check leases only on local system, not remote */
 521         bool noblocksnd:1;
 522         bool noautotune:1;
 523         bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
 524         bool fsc:1;     /* enable fscache */
 525         bool mfsymlinks:1; /* use Minshall+French Symlinks */
 526         bool multiuser:1;
 527         bool rwpidforward:1; /* pid forward for read/write operations */
 528         bool nosharesock:1;
 529         bool persistent:1;
 530         bool nopersistent:1;
 531         bool resilient:1; /* noresilient not required since not fored for CA */
 532         bool domainauto:1;
 533         unsigned int rsize;
 534         unsigned int wsize;
 535         bool sockopt_tcp_nodelay:1;
 536         unsigned long actimeo; /* attribute cache timeout (jiffies) */
 537         struct smb_version_operations *ops;
 538         struct smb_version_values *vals;
 539         char *prepath;
 540         struct sockaddr_storage dstaddr; /* destination address */
 541         struct sockaddr_storage srcaddr; /* allow binding to a local IP */
 542         struct nls_table *local_nls;
 543         unsigned int echo_interval; /* echo interval in secs */
 544         __u64 snapshot_time; /* needed for timewarp tokens */
 545         unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
 546 };
 547
 548 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
 549                          CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
 550                          CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
 551                          CIFS_MOUNT_MAP_SFM_CHR | \
 552                          CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
 553                          CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
 554                          CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
 555                          CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
 556                          CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
 557                          CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
 558                          CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
 559
 560 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
 561                       MS_NODEV | MS_SYNCHRONOUS)
 562
 563 struct cifs_mnt_data {
 564         struct cifs_sb_info *cifs_sb;
 565         struct smb_vol *vol;
 566         int flags;
 567 };
 568
 569 static inline unsigned int
 570 get_rfc1002_length(void *buf)
 571 {
 572         return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
 573 }
 574
 575 static inline void
 576 inc_rfc1001_len(void *buf, int count)
 577 {
 578         be32_add_cpu((__be32 *)buf, count);
 579 }
 580
 581 struct TCP_Server_Info {
 582         struct list_head tcp_ses_list;
 583         struct list_head smb_ses_list;
 584         int srv_count; /* reference counter */
 585         /* 15 character server name + 0x20 16th byte indicating type = srv */
 586         char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 587         struct smb_version_operations   *ops;
 588         struct smb_version_values       *vals;
 589         enum statusEnum tcpStatus; /* what we think the status is */
 590         char *hostname; /* hostname portion of UNC string */
 591         struct socket *ssocket;
 592         struct sockaddr_storage dstaddr;
 593         struct sockaddr_storage srcaddr; /* locally bind to this IP */
 594 #ifdef CONFIG_NET_NS
 595         struct net *net;
 596 #endif
 597         wait_queue_head_t response_q;
 598         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 599         struct list_head pending_mid_q;
 600         bool noblocksnd;                /* use blocking sendmsg */
 601         bool noautotune;                /* do not autotune send buf sizes */
 602         bool tcp_nodelay;
 603         unsigned int credits;  /* send no more requests at once */
 604         unsigned int max_credits; /* can override large 32000 default at mnt */
 605         unsigned int in_flight;  /* number of requests on the wire to server */
 606         spinlock_t req_lock;  /* protect the two values above */
 607         struct mutex srv_mutex;
 608         struct task_struct *tsk;
 609         char server_GUID[16];
 610         __u16 sec_mode;
 611         bool sign; /* is signing enabled on this connection? */
 612         bool session_estab; /* mark when very first sess is established */
 613 #ifdef CONFIG_CIFS_SMB2
 614         int echo_credits;  /* echo reserved slots */
 615         int oplock_credits;  /* oplock break reserved slots */
 616         bool echoes:1; /* enable echoes */
 617         __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
 618 #endif
 619         u16 dialect; /* dialect index that server chose */
 620         bool oplocks:1; /* enable oplocks */
 621         unsigned int maxReq;    /* Clients should submit no more */
 622         /* than maxReq distinct unanswered SMBs to the server when using  */
 623         /* multiplexed reads or writes */
 624         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 625         /* message size the server can send or receive for non-raw SMBs */
 626         /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
 627         /* when socket is setup (and during reconnect) before NegProt sent */
 628         unsigned int max_rw;    /* maxRw specifies the maximum */
 629         /* message size the server can send or receive for */
 630         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 631         unsigned int capabilities; /* selective disabling of caps by smb sess */
 632         int timeAdj;  /* Adjust for difference in server time zone in sec */
 633         __u64 CurrentMid;         /* multiplex id - rotating counter */
 634         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
 635         /* 16th byte of RFC1001 workstation name is always null */
 636         char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 637         __u32 sequence_number; /* for signing, protected by srv_mutex */
 638         struct session_key session_key;
 639         unsigned long lstrp; /* when we got last response from this server */
 640         struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
 641 #define CIFS_NEGFLAVOR_LANMAN   0       /* wct == 13, LANMAN */
 642 #define CIFS_NEGFLAVOR_UNENCAP  1       /* wct == 17, but no ext_sec */
 643 #define CIFS_NEGFLAVOR_EXTENDED 2       /* wct == 17, ext_sec bit set */
 644         char    negflavor;      /* NEGOTIATE response flavor */
 645         /* extended security flavors that server supports */
 646         bool    sec_ntlmssp;            /* supports NTLMSSP */
 647         bool    sec_kerberosu2u;        /* supports U2U Kerberos */
 648         bool    sec_kerberos;           /* supports plain Kerberos */
 649         bool    sec_mskerberos;         /* supports legacy MS Kerberos */
 650         bool    large_buf;              /* is current buffer large? */
 651         struct delayed_work     echo; /* echo ping workqueue job */
 652         char    *smallbuf;      /* pointer to current "small" buffer */
 653         char    *bigbuf;        /* pointer to current "big" buffer */
 654         unsigned int total_read; /* total amount of data read in this pass */
 655 #ifdef CONFIG_CIFS_FSCACHE
 656         struct fscache_cookie   *fscache; /* client index cache cookie */
 657 #endif
 658 #ifdef CONFIG_CIFS_STATS2
 659         atomic_t in_send; /* requests trying to send */
 660         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 661 #endif
 662 #ifdef CONFIG_CIFS_SMB2
 663         unsigned int    max_read;
 664         unsigned int    max_write;
 665         __u8            preauth_hash[512];
 666         struct delayed_work reconnect; /* reconnect workqueue job */
 667         struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
 668 #endif /* CONFIG_CIFS_SMB2 */
 669         unsigned long echo_interval;
 670 };
 671
 672 static inline unsigned int
 673 in_flight(struct TCP_Server_Info *server)
 674 {
 675         unsigned int num;
 676         spin_lock(&server->req_lock);
 677         num = server->in_flight;
 678         spin_unlock(&server->req_lock);
 679         return num;
 680 }
 681
 682 static inline bool
 683 has_credits(struct TCP_Server_Info *server, int *credits)
 684 {
 685         int num;
 686         spin_lock(&server->req_lock);
 687         num = *credits;
 688         spin_unlock(&server->req_lock);
 689         return num > 0;
 690 }
 691
 692 static inline void
 693 add_credits(struct TCP_Server_Info *server, const unsigned int add,
 694             const int optype)
 695 {
 696         server->ops->add_credits(server, add, optype);
 697 }
 698
 699 static inline void
 700 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
 701                         const int optype)
 702 {
 703         if (add) {
 704                 server->ops->add_credits(server, add, optype);
 705                 wake_up(&server->request_q);
 706         }
 707 }
 708
 709 static inline void
 710 set_credits(struct TCP_Server_Info *server, const int val)
 711 {
 712         server->ops->set_credits(server, val);
 713 }
 714
 715 static inline __le64
 716 get_next_mid64(struct TCP_Server_Info *server)
 717 {
 718         return cpu_to_le64(server->ops->get_next_mid(server));
 719 }
 720
 721 static inline __le16
 722 get_next_mid(struct TCP_Server_Info *server)
 723 {
 724         __u16 mid = server->ops->get_next_mid(server);
 725         /*
 726          * The value in the SMB header should be little endian for easy
 727          * on-the-wire decoding.
 728          */
 729         return cpu_to_le16(mid);
 730 }
 731
 732 static inline __u16
 733 get_mid(const struct smb_hdr *smb)
 734 {
 735         return le16_to_cpu(smb->Mid);
 736 }
 737
 738 static inline bool
 739 compare_mid(__u16 mid, const struct smb_hdr *smb)
 740 {
 741         return mid == le16_to_cpu(smb->Mid);
 742 }
 743
 744 /*
 745  * When the server supports very large reads and writes via POSIX extensions,
 746  * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
 747  * including the RFC1001 length.
 748  *
 749  * Note that this might make for "interesting" allocation problems during
 750  * writeback however as we have to allocate an array of pointers for the
 751  * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
 752  *
 753  * For reads, there is a similar problem as we need to allocate an array
 754  * of kvecs to handle the receive, though that should only need to be done
 755  * once.
 756  */
 757 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
 758 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
 759
 760 /*
 761  * When the server doesn't allow large posix writes, only allow a rsize/wsize
 762  * of 2^17-1 minus the size of the call header. That allows for a read or
 763  * write up to the maximum size described by RFC1002.
 764  */
 765 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
 766 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
 767
 768 /*
 769  * The default wsize is 1M. find_get_pages seems to return a maximum of 256
 770  * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
 771  * a single wsize request with a single call.
 772  */
 773 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
 774
 775 /*
 776  * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
 777  * those values when posix extensions aren't in force. In actuality here, we
 778  * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
 779  * to be ok with the extra byte even though Windows doesn't send writes that
 780  * are that large.
 781  *
 782  * Citation:
 783  *
 784  * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
 785  */
 786 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
 787 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
 788
 789 /*
 790  * Macros to allow the TCP_Server_Info->net field and related code to drop out
 791  * when CONFIG_NET_NS isn't set.
 792  */
 793
 794 #ifdef CONFIG_NET_NS
 795
 796 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 797 {
 798         return srv->net;
 799 }
 800
 801 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 802 {
 803         srv->net = net;
 804 }
 805
 806 #else
 807
 808 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 809 {
 810         return &init_net;
 811 }
 812
 813 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 814 {
 815 }
 816
 817 #endif
 818
 819 /*
 820  * Session structure.  One of these for each uid session with a particular host
 821  */
 822 struct cifs_ses {
 823         struct list_head smb_ses_list;
 824         struct list_head tcon_list;
 825         struct mutex session_mutex;
 826         struct TCP_Server_Info *server; /* pointer to server info */
 827         int ses_count;          /* reference counter */
 828         enum statusEnum status;
 829         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 830         __u32 ipc_tid;          /* special tid for connection to IPC share */
 831         char *serverOS;         /* name of operating system underlying server */
 832         char *serverNOS;        /* name of network operating system of server */
 833         char *serverDomain;     /* security realm of server */
 834         __u64 Suid;             /* remote smb uid  */
 835         kuid_t linux_uid;       /* overriding owner of files on the mount */
 836         kuid_t cred_uid;        /* owner of credentials */
 837         unsigned int capabilities;
 838         char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
 839                                 TCP names - will ipv6 and sctp addresses fit? */
 840         char *user_name;        /* must not be null except during init of sess
 841                                    and after mount option parsing we fill it */
 842         char *domainName;
 843         char *password;
 844         struct session_key auth_key;
 845         struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
 846         enum securityEnum sectype; /* what security flavor was specified? */
 847         bool sign;              /* is signing required? */
 848         bool need_reconnect:1; /* connection reset, uid now invalid */
 849         bool domainAuto:1;
 850 #ifdef CONFIG_CIFS_SMB2
 851         __u16 session_flags;
 852         __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
 853         __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
 854         __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
 855         __u8 preauth_hash[512];
 856 #endif /* CONFIG_CIFS_SMB2 */
 857 };
 858
 859 static inline bool
 860 cap_unix(struct cifs_ses *ses)
 861 {
 862         return ses->server->vals->cap_unix & ses->capabilities;
 863 }
 864
 865 /*
 866  * there is one of these for each connection to a resource on a particular
 867  * session
 868  */
 869 struct cifs_tcon {
 870         struct list_head tcon_list;
 871         int tc_count;
 872         struct list_head rlist; /* reconnect list */
 873         struct list_head openFileList;
 874         spinlock_t open_file_lock; /* protects list above */
 875         struct cifs_ses *ses;   /* pointer to session associated with */
 876         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 877         char *nativeFileSystem;
 878         char *password;         /* for share-level security */
 879         __u32 tid;              /* The 4 byte tree id */
 880         __u16 Flags;            /* optional support bits */
 881         enum statusEnum tidStatus;
 882 #ifdef CONFIG_CIFS_STATS
 883         atomic_t num_smbs_sent;
 884         union {
 885                 struct {
 886                         atomic_t num_writes;
 887                         atomic_t num_reads;
 888                         atomic_t num_flushes;
 889                         atomic_t num_oplock_brks;
 890                         atomic_t num_opens;
 891                         atomic_t num_closes;
 892                         atomic_t num_deletes;
 893                         atomic_t num_mkdirs;
 894                         atomic_t num_posixopens;
 895                         atomic_t num_posixmkdirs;
 896                         atomic_t num_rmdirs;
 897                         atomic_t num_renames;
 898                         atomic_t num_t2renames;
 899                         atomic_t num_ffirst;
 900                         atomic_t num_fnext;
 901                         atomic_t num_fclose;
 902                         atomic_t num_hardlinks;
 903                         atomic_t num_symlinks;
 904                         atomic_t num_locks;
 905                         atomic_t num_acl_get;
 906                         atomic_t num_acl_set;
 907                 } cifs_stats;
 908 #ifdef CONFIG_CIFS_SMB2
 909                 struct {
 910                         atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
 911                         atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
 912                 } smb2_stats;
 913 #endif /* CONFIG_CIFS_SMB2 */
 914         } stats;
 915 #ifdef CONFIG_CIFS_STATS2
 916         unsigned long long time_writes;
 917         unsigned long long time_reads;
 918         unsigned long long time_opens;
 919         unsigned long long time_deletes;
 920         unsigned long long time_closes;
 921         unsigned long long time_mkdirs;
 922         unsigned long long time_rmdirs;
 923         unsigned long long time_renames;
 924         unsigned long long time_t2renames;
 925         unsigned long long time_ffirst;
 926         unsigned long long time_fnext;
 927         unsigned long long time_fclose;
 928 #endif /* CONFIG_CIFS_STATS2 */
 929         __u64    bytes_read;
 930         __u64    bytes_written;
 931         spinlock_t stat_lock;  /* protects the two fields above */
 932 #endif /* CONFIG_CIFS_STATS */
 933         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 934         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 935         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 936         bool ipc:1;             /* set if connection to IPC$ eg for RPC/PIPES */
 937         bool retry:1;
 938         bool nocase:1;
 939         bool seal:1;      /* transport encryption for this mounted share */
 940         bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 941                                 for this mount even if server would support */
 942         bool local_lease:1; /* check leases (only) on local system not remote */
 943         bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 944         bool broken_sparse_sup; /* if server or share does not support sparse */
 945         bool need_reconnect:1; /* connection reset, tid now invalid */
 946         bool need_reopen_files:1; /* need to reopen tcon file handles */
 947         bool use_resilient:1; /* use resilient instead of durable handles */
 948         bool use_persistent:1; /* use persistent instead of durable handles */
 949 #ifdef CONFIG_CIFS_SMB2
 950         bool print:1;           /* set if connection to printer share */
 951         __le32 capabilities;
 952         __u32 share_flags;
 953         __u32 maximal_access;
 954         __u32 vol_serial_number;
 955         __le64 vol_create_time;
 956         __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
 957         __u32 ss_flags;         /* sector size flags */
 958         __u32 perf_sector_size; /* best sector size for perf */
 959         __u32 max_chunks;
 960         __u32 max_bytes_chunk;
 961         __u32 max_bytes_copy;
 962 #endif /* CONFIG_CIFS_SMB2 */
 963 #ifdef CONFIG_CIFS_FSCACHE
 964         u64 resource_id;                /* server resource id */
 965         struct fscache_cookie *fscache; /* cookie for share */
 966 #endif
 967         struct list_head pending_opens; /* list of incomplete opens */
 968         /* BB add field for back pointer to sb struct(s)? */
 969 };
 970
 971 /*
 972  * This is a refcounted and timestamped container for a tcon pointer. The
 973  * container holds a tcon reference. It is considered safe to free one of
 974  * these when the tl_count goes to 0. The tl_time is the time of the last
 975  * "get" on the container.
 976  */
 977 struct tcon_link {
 978         struct rb_node          tl_rbnode;
 979         kuid_t                  tl_uid;
 980         unsigned long           tl_flags;
 981 #define TCON_LINK_MASTER        0
 982 #define TCON_LINK_PENDING       1
 983 #define TCON_LINK_IN_TREE       2
 984         unsigned long           tl_time;
 985         atomic_t                tl_count;
 986         struct cifs_tcon        *tl_tcon;
 987 };
 988
 989 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
 990
 991 static inline struct cifs_tcon *
 992 tlink_tcon(struct tcon_link *tlink)
 993 {
 994         return tlink->tl_tcon;
 995 }
 996
 997 extern void cifs_put_tlink(struct tcon_link *tlink);
 998
 999 static inline struct tcon_link *
1000 cifs_get_tlink(struct tcon_link *tlink)
1001 {
1002         if (tlink && !IS_ERR(tlink))
1003                 atomic_inc(&tlink->tl_count);
1004         return tlink;
1005 }
1006
1007 /* This function is always expected to succeed */
1008 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1009
1010 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1011
1012 struct cifs_pending_open {
1013         struct list_head olist;
1014         struct tcon_link *tlink;
1015         __u8 lease_key[16];
1016         __u32 oplock;
1017 };
1018
1019 /*
1020  * This info hangs off the cifsFileInfo structure, pointed to by llist.
1021  * This is used to track byte stream locks on the file
1022  */
1023 struct cifsLockInfo {
1024         struct list_head llist; /* pointer to next cifsLockInfo */
1025         struct list_head blist; /* pointer to locks blocked on this */
1026         wait_queue_head_t block_q;
1027         __u64 offset;
1028         __u64 length;
1029         __u32 pid;
1030         __u32 type;
1031 };
1032
1033 /*
1034  * One of these for each open instance of a file
1035  */
1036 struct cifs_search_info {
1037         loff_t index_of_last_entry;
1038         __u16 entries_in_buffer;
1039         __u16 info_level;
1040         __u32 resume_key;
1041         char *ntwrk_buf_start;
1042         char *srch_entries_start;
1043         char *last_entry;
1044         const char *presume_name;
1045         unsigned int resume_name_len;
1046         bool endOfSearch:1;
1047         bool emptyDir:1;
1048         bool unicode:1;
1049         bool smallBuf:1; /* so we know which buf_release function to call */
1050 };
1051
1052 struct cifs_open_parms {
1053         struct cifs_tcon *tcon;
1054         struct cifs_sb_info *cifs_sb;
1055         int disposition;
1056         int desired_access;
1057         int create_options;
1058         const char *path;
1059         struct cifs_fid *fid;
1060         bool reconnect:1;
1061 };
1062
1063 struct cifs_fid {
1064         __u16 netfid;
1065 #ifdef CONFIG_CIFS_SMB2
1066         __u64 persistent_fid;   /* persist file id for smb2 */
1067         __u64 volatile_fid;     /* volatile file id for smb2 */
1068         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for smb2 */
1069         __u8 create_guid[16];
1070 #endif
1071         struct cifs_pending_open *pending_open;
1072         unsigned int epoch;
1073         bool purge_cache;
1074 };
1075
1076 struct cifs_fid_locks {
1077         struct list_head llist;
1078         struct cifsFileInfo *cfile;     /* fid that owns locks */
1079         struct list_head locks;         /* locks held by fid above */
1080 };
1081
1082 struct cifsFileInfo {
1083         /* following two lists are protected by tcon->open_file_lock */
1084         struct list_head tlist; /* pointer to next fid owned by tcon */
1085         struct list_head flist; /* next fid (file instance) for this inode */
1086         /* lock list below protected by cifsi->lock_sem */
1087         struct cifs_fid_locks *llist;   /* brlocks held by this fid */
1088         kuid_t uid;             /* allows finding which FileInfo structure */
1089         __u32 pid;              /* process id who opened file */
1090         struct cifs_fid fid;    /* file id from remote */
1091         struct list_head rlist; /* reconnect list */
1092         /* BB add lock scope info here if needed */ ;
1093         /* lock scope id (0 if none) */
1094         struct dentry *dentry;
1095         struct tcon_link *tlink;
1096         unsigned int f_flags;
1097         bool invalidHandle:1;   /* file closed via session abend */
1098         bool oplock_break_cancelled:1;
1099         int count;
1100         spinlock_t file_info_lock; /* protects four flag/count fields above */
1101         struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1102         struct cifs_search_info srch_inf;
1103         struct work_struct oplock_break; /* work for oplock breaks */
1104 };
1105
1106 struct cifs_io_parms {
1107         __u16 netfid;
1108 #ifdef CONFIG_CIFS_SMB2
1109         __u64 persistent_fid;   /* persist file id for smb2 */
1110         __u64 volatile_fid;     /* volatile file id for smb2 */
1111 #endif
1112         __u32 pid;
1113         __u64 offset;
1114         unsigned int length;
1115         struct cifs_tcon *tcon;
1116 };
1117
1118 struct cifs_aio_ctx {
1119         struct kref             refcount;
1120         struct list_head        list;
1121         struct mutex            aio_mutex;
1122         struct completion       done;
1123         struct iov_iter         iter;
1124         struct kiocb            *iocb;
1125         struct cifsFileInfo     *cfile;
1126         struct bio_vec          *bv;
1127         loff_t                  pos;
1128         unsigned int            npages;
1129         ssize_t                 rc;
1130         unsigned int            len;
1131         unsigned int            total_len;
1132         bool                    should_dirty;
1133 };
1134
1135 struct cifs_readdata;
1136
1137 /* asynchronous read support */
1138 struct cifs_readdata {
1139         struct kref                     refcount;
1140         struct list_head                list;
1141         struct completion               done;
1142         struct cifsFileInfo             *cfile;
1143         struct address_space            *mapping;
1144         struct cifs_aio_ctx             *ctx;
1145         __u64                           offset;
1146         unsigned int                    bytes;
1147         unsigned int                    got_bytes;
1148         pid_t                           pid;
1149         int                             result;
1150         struct work_struct              work;
1151         int (*read_into_pages)(struct TCP_Server_Info *server,
1152                                 struct cifs_readdata *rdata,
1153                                 unsigned int len);
1154         int (*copy_into_pages)(struct TCP_Server_Info *server,
1155                                 struct cifs_readdata *rdata,
1156                                 struct iov_iter *iter);
1157         struct kvec                     iov[2];
1158         unsigned int                    pagesz;
1159         unsigned int                    tailsz;
1160         unsigned int                    credits;
1161         unsigned int                    nr_pages;
1162         struct page                     *pages[];
1163 };
1164
1165 struct cifs_writedata;
1166
1167 /* asynchronous write support */
1168 struct cifs_writedata {
1169         struct kref                     refcount;
1170         struct list_head                list;
1171         struct completion               done;
1172         enum writeback_sync_modes       sync_mode;
1173         struct work_struct              work;
1174         struct cifsFileInfo             *cfile;
1175         struct cifs_aio_ctx             *ctx;
1176         __u64                           offset;
1177         pid_t                           pid;
1178         unsigned int                    bytes;
1179         int                             result;
1180         unsigned int                    pagesz;
1181         unsigned int                    tailsz;
1182         unsigned int                    credits;
1183         unsigned int                    nr_pages;
1184         struct page                     *pages[];
1185 };
1186
1187 /*
1188  * Take a reference on the file private data. Must be called with
1189  * cfile->file_info_lock held.
1190  */
1191 static inline void
1192 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1193 {
1194         ++cifs_file->count;
1195 }
1196
1197 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1198 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1199
1200 #define CIFS_CACHE_READ_FLG     1
1201 #define CIFS_CACHE_HANDLE_FLG   2
1202 #define CIFS_CACHE_RH_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1203 #define CIFS_CACHE_WRITE_FLG    4
1204 #define CIFS_CACHE_RW_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1205 #define CIFS_CACHE_RHW_FLG      (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1206
1207 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1208 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1209 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1210
1211 /*
1212  * One of these for each file inode
1213  */
1214
1215 struct cifsInodeInfo {
1216         bool can_cache_brlcks;
1217         struct list_head llist; /* locks helb by this inode */
1218         struct rw_semaphore lock_sem;   /* protect the fields above */
1219         /* BB add in lists for dirty pages i.e. write caching info for oplock */
1220         struct list_head openFileList;
1221         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1222         unsigned int oplock;            /* oplock/lease level we have */
1223         unsigned int epoch;             /* used to track lease state changes */
1224 #define CIFS_INODE_PENDING_OPLOCK_BREAK   (0) /* oplock break in progress */
1225 #define CIFS_INODE_PENDING_WRITERS        (1) /* Writes in progress */
1226 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1227 #define CIFS_INO_DELETE_PENDING           (3) /* delete pending on server */
1228 #define CIFS_INO_INVALID_MAPPING          (4) /* pagecache is invalid */
1229 #define CIFS_INO_LOCK                     (5) /* lock bit for synchronization */
1230         unsigned long flags;
1231         spinlock_t writers_lock;
1232         unsigned int writers;           /* Number of writers on this inode */
1233         unsigned long time;             /* jiffies of last update of inode */
1234         u64  server_eof;                /* current file size on server -- protected by i_lock */
1235         u64  uniqueid;                  /* server inode number */
1236         u64  createtime;                /* creation time on server */
1237 #ifdef CONFIG_CIFS_SMB2
1238         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for this inode */
1239 #endif
1240 #ifdef CONFIG_CIFS_FSCACHE
1241         struct fscache_cookie *fscache;
1242 #endif
1243         struct inode vfs_inode;
1244 };
1245
1246 static inline struct cifsInodeInfo *
1247 CIFS_I(struct inode *inode)
1248 {
1249         return container_of(inode, struct cifsInodeInfo, vfs_inode);
1250 }
1251
1252 static inline struct cifs_sb_info *
1253 CIFS_SB(struct super_block *sb)
1254 {
1255         return sb->s_fs_info;
1256 }
1257
1258 static inline struct cifs_sb_info *
1259 CIFS_FILE_SB(struct file *file)
1260 {
1261         return CIFS_SB(file_inode(file)->i_sb);
1262 }
1263
1264 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1265 {
1266         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1267                 return '/';
1268         else
1269                 return '\\';
1270 }
1271
1272 static inline void
1273 convert_delimiter(char *path, char delim)
1274 {
1275         char old_delim, *pos;
1276
1277         if (delim == '/')
1278                 old_delim = '\\';
1279         else
1280                 old_delim = '/';
1281
1282         pos = path;
1283         while ((pos = strchr(pos, old_delim)))
1284                 *pos = delim;
1285 }
1286
1287 #ifdef CONFIG_CIFS_STATS
1288 #define cifs_stats_inc atomic_inc
1289
1290 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1291                                             unsigned int bytes)
1292 {
1293         if (bytes) {
1294                 spin_lock(&tcon->stat_lock);
1295                 tcon->bytes_written += bytes;
1296                 spin_unlock(&tcon->stat_lock);
1297         }
1298 }
1299
1300 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1301                                          unsigned int bytes)
1302 {
1303         spin_lock(&tcon->stat_lock);
1304         tcon->bytes_read += bytes;
1305         spin_unlock(&tcon->stat_lock);
1306 }
1307 #else
1308
1309 #define  cifs_stats_inc(field) do {} while (0)
1310 #define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1311 #define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1312
1313 #endif
1314
1315
1316 /*
1317  * This is the prototype for the mid receive function. This function is for
1318  * receiving the rest of the SMB frame, starting with the WordCount (which is
1319  * just after the MID in struct smb_hdr). Note:
1320  *
1321  * - This will be called by cifsd, with no locks held.
1322  * - The mid will still be on the pending_mid_q.
1323  * - mid->resp_buf will point to the current buffer.
1324  *
1325  * Returns zero on a successful receive, or an error. The receive state in
1326  * the TCP_Server_Info will also be updated.
1327  */
1328 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1329                             struct mid_q_entry *mid);
1330
1331 /*
1332  * This is the prototype for the mid callback function. This is called once the
1333  * mid has been received off of the socket. When creating one, take special
1334  * care to avoid deadlocks. Things to bear in mind:
1335  *
1336  * - it will be called by cifsd, with no locks held
1337  * - the mid will be removed from any lists
1338  */
1339 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1340
1341 /*
1342  * This is the protopyte for mid handle function. This is called once the mid
1343  * has been recognized after decryption of the message.
1344  */
1345 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1346                             struct mid_q_entry *mid);
1347
1348 /* one of these for every pending CIFS request to the server */
1349 struct mid_q_entry {
1350         struct list_head qhead; /* mids waiting on reply from this server */
1351         struct TCP_Server_Info *server; /* server corresponding to this mid */
1352         __u64 mid;              /* multiplex id */
1353         __u32 pid;              /* process id */
1354         __u32 sequence_number;  /* for CIFS signing */
1355         unsigned long when_alloc;  /* when mid was created */
1356 #ifdef CONFIG_CIFS_STATS2
1357         unsigned long when_sent; /* time when smb send finished */
1358         unsigned long when_received; /* when demux complete (taken off wire) */
1359 #endif
1360         mid_receive_t *receive; /* call receive callback */
1361         mid_callback_t *callback; /* call completion callback */
1362         mid_handle_t *handle; /* call handle mid callback */
1363         void *callback_data;      /* general purpose pointer for callback */
1364         void *resp_buf;         /* pointer to received SMB header */
1365         int mid_state;  /* wish this were enum but can not pass to wait_event */
1366         unsigned int mid_flags;
1367         __le16 command;         /* smb command code */
1368         bool large_buf:1;       /* if valid response, is pointer to large buf */
1369         bool multiRsp:1;        /* multiple trans2 responses for one request  */
1370         bool multiEnd:1;        /* both received */
1371         bool decrypted:1;       /* decrypted entry */
1372 };
1373
1374 struct close_cancelled_open {
1375         struct cifs_fid         fid;
1376         struct cifs_tcon        *tcon;
1377         struct work_struct      work;
1378 };
1379
1380 /*      Make code in transport.c a little cleaner by moving
1381         update of optional stats into function below */
1382 #ifdef CONFIG_CIFS_STATS2
1383
1384 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1385 {
1386         atomic_inc(&server->in_send);
1387 }
1388
1389 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1390 {
1391         atomic_dec(&server->in_send);
1392 }
1393
1394 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1395 {
1396         atomic_inc(&server->num_waiters);
1397 }
1398
1399 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1400 {
1401         atomic_dec(&server->num_waiters);
1402 }
1403
1404 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1405 {
1406         mid->when_sent = jiffies;
1407 }
1408 #else
1409 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1410 {
1411 }
1412 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1413 {
1414 }
1415
1416 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1417 {
1418 }
1419
1420 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1421 {
1422 }
1423
1424 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1425 {
1426 }
1427 #endif
1428
1429 /* for pending dnotify requests */
1430 struct dir_notify_req {
1431         struct list_head lhead;
1432         __le16 Pid;
1433         __le16 PidHigh;
1434         __u16 Mid;
1435         __u16 Tid;
1436         __u16 Uid;
1437         __u16 netfid;
1438         __u32 filter; /* CompletionFilter (for multishot) */
1439         int multishot;
1440         struct file *pfile;
1441 };
1442
1443 struct dfs_info3_param {
1444         int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1445         int path_consumed;
1446         int server_type;
1447         int ref_flag;
1448         char *path_name;
1449         char *node_name;
1450 };
1451
1452 /*
1453  * common struct for holding inode info when searching for or updating an
1454  * inode with new info
1455  */
1456
1457 #define CIFS_FATTR_DFS_REFERRAL         0x1
1458 #define CIFS_FATTR_DELETE_PENDING       0x2
1459 #define CIFS_FATTR_NEED_REVAL           0x4
1460 #define CIFS_FATTR_INO_COLLISION        0x8
1461 #define CIFS_FATTR_UNKNOWN_NLINK        0x10
1462
1463 struct cifs_fattr {
1464         u32             cf_flags;
1465         u32             cf_cifsattrs;
1466         u64             cf_uniqueid;
1467         u64             cf_eof;
1468         u64             cf_bytes;
1469         u64             cf_createtime;
1470         kuid_t          cf_uid;
1471         kgid_t          cf_gid;
1472         umode_t         cf_mode;
1473         dev_t           cf_rdev;
1474         unsigned int    cf_nlink;
1475         unsigned int    cf_dtype;
1476         struct timespec cf_atime;
1477         struct timespec cf_mtime;
1478         struct timespec cf_ctime;
1479 };
1480
1481 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1482 {
1483         if (param) {
1484                 kfree(param->path_name);
1485                 kfree(param->node_name);
1486                 kfree(param);
1487         }
1488 }
1489
1490 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1491                                        int number_of_items)
1492 {
1493         int i;
1494         if ((number_of_items == 0) || (param == NULL))
1495                 return;
1496         for (i = 0; i < number_of_items; i++) {
1497                 kfree(param[i].path_name);
1498                 kfree(param[i].node_name);
1499         }
1500         kfree(param);
1501 }
1502
1503 #define   MID_FREE 0
1504 #define   MID_REQUEST_ALLOCATED 1
1505 #define   MID_REQUEST_SUBMITTED 2
1506 #define   MID_RESPONSE_RECEIVED 4
1507 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
1508 #define   MID_RESPONSE_MALFORMED 0x10
1509 #define   MID_SHUTDOWN           0x20
1510
1511 /* Flags */
1512 #define   MID_WAIT_CANCELLED     1 /* Cancelled while waiting for response */
1513
1514 /* Types of response buffer returned from SendReceive2 */
1515 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
1516 #define   CIFS_SMALL_BUFFER     1
1517 #define   CIFS_LARGE_BUFFER     2
1518 #define   CIFS_IOVEC            4    /* array of response buffers */
1519
1520 /* Type of Request to SendReceive2 */
1521 #define   CIFS_BLOCKING_OP      1    /* operation can block */
1522 #define   CIFS_ASYNC_OP         2    /* do not wait for response */
1523 #define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
1524 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
1525 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
1526 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
1527
1528 /* Type of request operation */
1529 #define   CIFS_ECHO_OP      0x080    /* echo request */
1530 #define   CIFS_OBREAK_OP   0x0100    /* oplock break request */
1531 #define   CIFS_NEG_OP      0x0200    /* negotiate request */
1532 #define   CIFS_OP_MASK     0x0380    /* mask request type */
1533
1534 #define   CIFS_HAS_CREDITS 0x0400    /* already has credits */
1535 #define   CIFS_TRANSFORM_REQ 0x0800    /* transform request before sending */
1536
1537 /* Security Flags: indicate type of session setup needed */
1538 #define   CIFSSEC_MAY_SIGN      0x00001
1539 #define   CIFSSEC_MAY_NTLM      0x00002
1540 #define   CIFSSEC_MAY_NTLMV2    0x00004
1541 #define   CIFSSEC_MAY_KRB5      0x00008
1542 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1543 #define   CIFSSEC_MAY_LANMAN    0x00010
1544 #define   CIFSSEC_MAY_PLNTXT    0x00020
1545 #else
1546 #define   CIFSSEC_MAY_LANMAN    0
1547 #define   CIFSSEC_MAY_PLNTXT    0
1548 #endif /* weak passwords */
1549 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
1550 #define   CIFSSEC_MAY_NTLMSSP   0x00080 /* raw ntlmssp with ntlmv2 */
1551
1552 #define   CIFSSEC_MUST_SIGN     0x01001
1553 /* note that only one of the following can be set so the
1554 result of setting MUST flags more than once will be to
1555 require use of the stronger protocol */
1556 #define   CIFSSEC_MUST_NTLM     0x02002
1557 #define   CIFSSEC_MUST_NTLMV2   0x04004
1558 #define   CIFSSEC_MUST_KRB5     0x08008
1559 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1560 #define   CIFSSEC_MUST_LANMAN   0x10010
1561 #define   CIFSSEC_MUST_PLNTXT   0x20020
1562 #ifdef CONFIG_CIFS_UPCALL
1563 #define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
1564 #else
1565 #define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
1566 #endif /* UPCALL */
1567 #else /* do not allow weak pw hash */
1568 #define   CIFSSEC_MUST_LANMAN   0
1569 #define   CIFSSEC_MUST_PLNTXT   0
1570 #ifdef CONFIG_CIFS_UPCALL
1571 #define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
1572 #else
1573 #define   CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
1574 #endif /* UPCALL */
1575 #endif /* WEAK_PW_HASH */
1576 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
1577 #define   CIFSSEC_MUST_NTLMSSP  0x80080 /* raw ntlmssp with ntlmv2 */
1578
1579 #define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1580 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1581 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1582 /*
1583  *****************************************************************
1584  * All constants go here
1585  *****************************************************************
1586  */
1587
1588 #define UID_HASH (16)
1589
1590 /*
1591  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1592  * following to be declared.
1593  */
1594
1595 /****************************************************************************
1596  *  Locking notes.  All updates to global variables and lists should be
1597  *                  protected by spinlocks or semaphores.
1598  *
1599  *  Spinlocks
1600  *  ---------
1601  *  GlobalMid_Lock protects:
1602  *      list operations on pending_mid_q and oplockQ
1603  *      updates to XID counters, multiplex id  and SMB sequence numbers
1604  *  tcp_ses_lock protects:
1605  *      list operations on tcp and SMB session lists
1606  *  tcon->open_file_lock protects the list of open files hanging off the tcon
1607  *  cfile->file_info_lock protects counters and fields in cifs file struct
1608  *  f_owner.lock protects certain per file struct operations
1609  *  mapping->page_lock protects certain per page operations
1610  *
1611  *  Semaphores
1612  *  ----------
1613  *  sesSem     operations on smb session
1614  *  tconSem    operations on tree connection
1615  *  fh_sem      file handle reconnection operations
1616  *
1617  ****************************************************************************/
1618
1619 #ifdef DECLARE_GLOBALS_HERE
1620 #define GLOBAL_EXTERN
1621 #else
1622 #define GLOBAL_EXTERN extern
1623 #endif
1624
1625 /*
1626  * the list of TCP_Server_Info structures, ie each of the sockets
1627  * connecting our client to a distinct server (ip address), is
1628  * chained together by cifs_tcp_ses_list. The list of all our SMB
1629  * sessions (and from that the tree connections) can be found
1630  * by iterating over cifs_tcp_ses_list
1631  */
1632 GLOBAL_EXTERN struct list_head          cifs_tcp_ses_list;
1633
1634 /*
1635  * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1636  * tcp session, and the list of tcon's per smb session. It also protects
1637  * the reference counters for the server, smb session, and tcon. Finally,
1638  * changes to the tcon->tidStatus should be done while holding this lock.
1639  * generally the locks should be taken in order tcp_ses_lock before
1640  * tcon->open_file_lock and that before file->file_info_lock since the
1641  * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1642  */
1643 GLOBAL_EXTERN spinlock_t                cifs_tcp_ses_lock;
1644
1645 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1646 /* Outstanding dir notify requests */
1647 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1648 /* DirNotify response queue */
1649 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1650 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1651
1652 /*
1653  * Global transaction id (XID) information
1654  */
1655 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
1656 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1657 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
1658 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
1659                                           /* on midQ entries */
1660 /*
1661  *  Global counters, updated atomically
1662  */
1663 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1664 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1665 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1666 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1667 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1668
1669 /* Various Debug counters */
1670 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
1671 #ifdef CONFIG_CIFS_STATS2
1672 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1673 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1674 #endif
1675 GLOBAL_EXTERN atomic_t smBufAllocCount;
1676 GLOBAL_EXTERN atomic_t midCount;
1677
1678 /* Misc globals */
1679 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1680 GLOBAL_EXTERN bool lookupCacheEnabled;
1681 GLOBAL_EXTERN unsigned int global_secflags;     /* if on, session setup sent
1682                                 with more secure ntlmssp2 challenge/resp */
1683 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
1684 GLOBAL_EXTERN bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1685 GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
1686 GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
1687 GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
1688 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1689
1690 #ifdef CONFIG_CIFS_ACL
1691 GLOBAL_EXTERN struct rb_root uidtree;
1692 GLOBAL_EXTERN struct rb_root gidtree;
1693 GLOBAL_EXTERN spinlock_t siduidlock;
1694 GLOBAL_EXTERN spinlock_t sidgidlock;
1695 GLOBAL_EXTERN struct rb_root siduidtree;
1696 GLOBAL_EXTERN struct rb_root sidgidtree;
1697 GLOBAL_EXTERN spinlock_t uidsidlock;
1698 GLOBAL_EXTERN spinlock_t gidsidlock;
1699 #endif /* CONFIG_CIFS_ACL */
1700
1701 void cifs_oplock_break(struct work_struct *work);
1702
1703 extern const struct slow_work_ops cifs_oplock_break_ops;
1704 extern struct workqueue_struct *cifsiod_wq;
1705 extern struct workqueue_struct *cifsoplockd_wq;
1706 extern __u32 cifs_lock_secret;
1707
1708 extern mempool_t *cifs_mid_poolp;
1709
1710 /* Operations for different SMB versions */
1711 #define SMB1_VERSION_STRING     "1.0"
1712 extern struct smb_version_operations smb1_operations;
1713 extern struct smb_version_values smb1_values;
1714 #define SMB20_VERSION_STRING    "2.0"
1715 extern struct smb_version_operations smb20_operations;
1716 extern struct smb_version_values smb20_values;
1717 #define SMB21_VERSION_STRING    "2.1"
1718 extern struct smb_version_operations smb21_operations;
1719 extern struct smb_version_values smb21_values;
1720 #define SMB30_VERSION_STRING    "3.0"
1721 extern struct smb_version_operations smb30_operations;
1722 extern struct smb_version_values smb30_values;
1723 #define SMB302_VERSION_STRING   "3.02"
1724 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1725 extern struct smb_version_values smb302_values;
1726 #define SMB311_VERSION_STRING   "3.1.1"
1727 #define ALT_SMB311_VERSION_STRING "3.11"
1728 extern struct smb_version_operations smb311_operations;
1729 extern struct smb_version_values smb311_values;
1730 #endif  /* _CIFS_GLOB_H */