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 #include "smb2pdu.h"
  33
  34 #define CIFS_MAGIC_NUMBER 0xFF534D42      /* the first four bytes of SMB PDUs */
  35
  36 #define CIFS_PORT 445
  37 #define RFC1001_PORT 139
  38
  39 /*
  40  * The sizes of various internal tables and strings
  41  */
  42 #define MAX_UID_INFO 16
  43 #define MAX_SES_INFO 2
  44 #define MAX_TCON_INFO 4
  45
  46 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
  47
  48 #define CIFS_MIN_RCV_POOL 4
  49
  50 #define MAX_REOPEN_ATT  5 /* these many maximum attempts to reopen a file */
  51 /*
  52  * default attribute cache timeout (jiffies)
  53  */
  54 #define CIFS_DEF_ACTIMEO (1 * HZ)
  55
  56 /*
  57  * max attribute cache timeout (jiffies) - 2^30
  58  */
  59 #define CIFS_MAX_ACTIMEO (1 << 30)
  60
  61 /*
  62  * MAX_REQ is the maximum number of requests that WE will send
  63  * on one socket concurrently.
  64  */
  65 #define CIFS_MAX_REQ 32767
  66
  67 #define RFC1001_NAME_LEN 15
  68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
  69
  70 /* maximum length of ip addr as a string (including ipv6 and sctp) */
  71 #define SERVER_NAME_LENGTH 80
  72 #define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
  73
  74 /* echo interval in seconds */
  75 #define SMB_ECHO_INTERVAL_MIN 1
  76 #define SMB_ECHO_INTERVAL_MAX 600
  77 #define SMB_ECHO_INTERVAL_DEFAULT 60
  78
  79 /* maximum number of PDUs in one compound */
  80 #define MAX_COMPOUND 5
  81
  82 /*
  83  * Default number of credits to keep available for SMB3.
  84  * This value is chosen somewhat arbitrarily. The Windows client
  85  * defaults to 128 credits, the Windows server allows clients up to
  86  * 512 credits (or 8K for later versions), and the NetApp server
  87  * does not limit clients at all.  Choose a high enough default value
  88  * such that the client shouldn't limit performance, but allow mount
  89  * to override (until you approach 64K, where we limit credits to 65000
  90  * to reduce possibility of seeing more server credit overflow bugs.
  91  */
  92 #define SMB2_MAX_CREDITS_AVAILABLE 32000
  93
  94 #include "cifspdu.h"
  95
  96 #ifndef XATTR_DOS_ATTRIB
  97 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  98 #endif
  99
 100 /*
 101  * CIFS vfs client Status information (based on what we know.)
 102  */
 103
 104 /* associated with each tcp and smb session */
 105 enum statusEnum {
 106         CifsNew = 0,
 107         CifsGood,
 108         CifsExiting,
 109         CifsNeedReconnect,
 110         CifsNeedNegotiate
 111 };
 112
 113 enum securityEnum {
 114         Unspecified = 0,        /* not specified */
 115         LANMAN,                 /* Legacy LANMAN auth */
 116         NTLM,                   /* Legacy NTLM012 auth with NTLM hash */
 117         NTLMv2,                 /* Legacy NTLM auth with NTLMv2 hash */
 118         RawNTLMSSP,             /* NTLMSSP without SPNEGO, NTLMv2 hash */
 119         Kerberos,               /* Kerberos via SPNEGO */
 120 };
 121
 122 struct session_key {
 123         unsigned int len;
 124         char *response;
 125 };
 126
 127 /* crypto security descriptor definition */
 128 struct sdesc {
 129         struct shash_desc shash;
 130         char ctx[];
 131 };
 132
 133 /* crypto hashing related structure/fields, not specific to a sec mech */
 134 struct cifs_secmech {
 135         struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
 136         struct crypto_shash *md5; /* md5 hash function */
 137         struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
 138         struct crypto_shash *cmacaes; /* block-cipher based MAC function */
 139         struct crypto_shash *sha512; /* sha512 hash function */
 140         struct sdesc *sdeschmacmd5;  /* ctxt to generate ntlmv2 hash, CR1 */
 141         struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
 142         struct sdesc *sdeschmacsha256;  /* ctxt to generate smb2 signature */
 143         struct sdesc *sdesccmacaes;  /* ctxt to generate smb3 signature */
 144         struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
 145         struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
 146         struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
 147 };
 148
 149 /* per smb session structure/fields */
 150 struct ntlmssp_auth {
 151         bool sesskey_per_smbsess; /* whether session key is per smb session */
 152         __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
 153         __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
 154         unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
 155         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
 156 };
 157
 158 struct cifs_cred {
 159         int uid;
 160         int gid;
 161         int mode;
 162         int cecount;
 163         struct cifs_sid osid;
 164         struct cifs_sid gsid;
 165         struct cifs_ntace *ntaces;
 166         struct cifs_ace *aces;
 167 };
 168
 169 /*
 170  *****************************************************************
 171  * Except the CIFS PDUs themselves all the
 172  * globally interesting structs should go here
 173  *****************************************************************
 174  */
 175
 176 /*
 177  * A smb_rqst represents a complete request to be issued to a server. It's
 178  * formed by a kvec array, followed by an array of pages. Page data is assumed
 179  * to start at the beginning of the first page.
 180  */
 181 struct smb_rqst {
 182         struct kvec     *rq_iov;        /* array of kvecs */
 183         unsigned int    rq_nvec;        /* number of kvecs in array */
 184         struct page     **rq_pages;     /* pointer to array of page ptrs */
 185         unsigned int    rq_offset;      /* the offset to the 1st page */
 186         unsigned int    rq_npages;      /* number pages in array */
 187         unsigned int    rq_pagesz;      /* page size to use */
 188         unsigned int    rq_tailsz;      /* length of last page */
 189 };
 190
 191 enum smb_version {
 192         Smb_1 = 1,
 193         Smb_20,
 194         Smb_21,
 195         Smb_30,
 196         Smb_302,
 197         Smb_311,
 198         Smb_3any,
 199         Smb_default,
 200         Smb_version_err
 201 };
 202
 203 struct mid_q_entry;
 204 struct TCP_Server_Info;
 205 struct cifsFileInfo;
 206 struct cifs_ses;
 207 struct cifs_tcon;
 208 struct dfs_info3_param;
 209 struct cifs_fattr;
 210 struct smb_vol;
 211 struct cifs_fid;
 212 struct cifs_readdata;
 213 struct cifs_writedata;
 214 struct cifs_io_parms;
 215 struct cifs_search_info;
 216 struct cifsInodeInfo;
 217 struct cifs_open_parms;
 218
 219 struct smb_version_operations {
 220         int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
 221                            struct mid_q_entry *);
 222         bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
 223         /* setup request: allocate mid, sign message */
 224         struct mid_q_entry *(*setup_request)(struct cifs_ses *,
 225                                                 struct smb_rqst *);
 226         /* setup async request: allocate mid, sign message */
 227         struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
 228                                                 struct smb_rqst *);
 229         /* check response: verify signature, map error */
 230         int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
 231                              bool);
 232         void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
 233                             const int);
 234         void (*set_credits)(struct TCP_Server_Info *, const int);
 235         int * (*get_credits_field)(struct TCP_Server_Info *, const int);
 236         unsigned int (*get_credits)(struct mid_q_entry *);
 237         __u64 (*get_next_mid)(struct TCP_Server_Info *);
 238         void (*revert_current_mid)(struct TCP_Server_Info *server,
 239                                    const unsigned int val);
 240         /* data offset from read response message */
 241         unsigned int (*read_data_offset)(char *);
 242         /*
 243          * Data length from read response message
 244          * When in_remaining is true, the returned data length is in
 245          * message field DataRemaining for out-of-band data read (e.g through
 246          * Memory Registration RDMA write in SMBD).
 247          * Otherwise, the returned data length is in message field DataLength.
 248          */
 249         unsigned int (*read_data_length)(char *, bool in_remaining);
 250         /* map smb to linux error */
 251         int (*map_error)(char *, bool);
 252         /* find mid corresponding to the response message */
 253         struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
 254         void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
 255         void (*clear_stats)(struct cifs_tcon *);
 256         void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
 257         void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
 258         /* verify the message */
 259         int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
 260         bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
 261         int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
 262         void (*downgrade_oplock)(struct TCP_Server_Info *,
 263                                         struct cifsInodeInfo *, bool);
 264         /* process transaction2 response */
 265         bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
 266                              char *, int);
 267         /* check if we need to negotiate */
 268         bool (*need_neg)(struct TCP_Server_Info *);
 269         /* negotiate to the server */
 270         int (*negotiate)(const unsigned int, struct cifs_ses *);
 271         /* set negotiated write size */
 272         unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
 273         /* set negotiated read size */
 274         unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
 275         /* setup smb sessionn */
 276         int (*sess_setup)(const unsigned int, struct cifs_ses *,
 277                           const struct nls_table *);
 278         /* close smb session */
 279         int (*logoff)(const unsigned int, struct cifs_ses *);
 280         /* connect to a server share */
 281         int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
 282                             struct cifs_tcon *, const struct nls_table *);
 283         /* close tree connecion */
 284         int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
 285         /* get DFS referrals */
 286         int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
 287                              const char *, struct dfs_info3_param **,
 288                              unsigned int *, const struct nls_table *, int);
 289         /* informational QFS call */
 290         void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
 291         /* check if a path is accessible or not */
 292         int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
 293                                   struct cifs_sb_info *, const char *);
 294         /* query path data from the server */
 295         int (*query_path_info)(const unsigned int, struct cifs_tcon *,
 296                                struct cifs_sb_info *, const char *,
 297                                FILE_ALL_INFO *, bool *, bool *);
 298         /* query file data from the server */
 299         int (*query_file_info)(const unsigned int, struct cifs_tcon *,
 300                                struct cifs_fid *, FILE_ALL_INFO *);
 301         /* get server index number */
 302         int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
 303                             struct cifs_sb_info *, const char *,
 304                             u64 *uniqueid, FILE_ALL_INFO *);
 305         /* set size by path */
 306         int (*set_path_size)(const unsigned int, struct cifs_tcon *,
 307                              const char *, __u64, struct cifs_sb_info *, bool);
 308         /* set size by file handle */
 309         int (*set_file_size)(const unsigned int, struct cifs_tcon *,
 310                              struct cifsFileInfo *, __u64, bool);
 311         /* set attributes */
 312         int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
 313                              const unsigned int);
 314         int (*set_compression)(const unsigned int, struct cifs_tcon *,
 315                                struct cifsFileInfo *);
 316         /* check if we can send an echo or nor */
 317         bool (*can_echo)(struct TCP_Server_Info *);
 318         /* send echo request */
 319         int (*echo)(struct TCP_Server_Info *);
 320         /* create directory */
 321         int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
 322                         umode_t mode, struct cifs_tcon *tcon,
 323                         const char *full_path,
 324                         struct cifs_sb_info *cifs_sb);
 325         int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
 326                      struct cifs_sb_info *);
 327         /* set info on created directory */
 328         void (*mkdir_setinfo)(struct inode *, const char *,
 329                               struct cifs_sb_info *, struct cifs_tcon *,
 330                               const unsigned int);
 331         /* remove directory */
 332         int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
 333                      struct cifs_sb_info *);
 334         /* unlink file */
 335         int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
 336                       struct cifs_sb_info *);
 337         /* open, rename and delete file */
 338         int (*rename_pending_delete)(const char *, struct dentry *,
 339                                      const unsigned int);
 340         /* send rename request */
 341         int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
 342                       const char *, struct cifs_sb_info *);
 343         /* send create hardlink request */
 344         int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
 345                                const char *, const char *,
 346                                struct cifs_sb_info *);
 347         /* query symlink target */
 348         int (*query_symlink)(const unsigned int, struct cifs_tcon *,
 349                              const char *, char **, struct cifs_sb_info *);
 350         /* open a file for non-posix mounts */
 351         int (*open)(const unsigned int, struct cifs_open_parms *,
 352                     __u32 *, FILE_ALL_INFO *);
 353         /* set fid protocol-specific info */
 354         void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
 355         /* close a file */
 356         void (*close)(const unsigned int, struct cifs_tcon *,
 357                       struct cifs_fid *);
 358         /* send a flush request to the server */
 359         int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
 360         /* async read from the server */
 361         int (*async_readv)(struct cifs_readdata *);
 362         /* async write to the server */
 363         int (*async_writev)(struct cifs_writedata *,
 364                             void (*release)(struct kref *));
 365         /* sync read from the server */
 366         int (*sync_read)(const unsigned int, struct cifs_fid *,
 367                          struct cifs_io_parms *, unsigned int *, char **,
 368                          int *);
 369         /* sync write to the server */
 370         int (*sync_write)(const unsigned int, struct cifs_fid *,
 371                           struct cifs_io_parms *, unsigned int *, struct kvec *,
 372                           unsigned long);
 373         /* open dir, start readdir */
 374         int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
 375                                const char *, struct cifs_sb_info *,
 376                                struct cifs_fid *, __u16,
 377                                struct cifs_search_info *);
 378         /* continue readdir */
 379         int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
 380                               struct cifs_fid *,
 381                               __u16, struct cifs_search_info *srch_inf);
 382         /* close dir */
 383         int (*close_dir)(const unsigned int, struct cifs_tcon *,
 384                          struct cifs_fid *);
 385         /* calculate a size of SMB message */
 386         unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
 387         /* check for STATUS_PENDING and process it in a positive case */
 388         bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
 389         /* check for STATUS_NETWORK_SESSION_EXPIRED */
 390         bool (*is_session_expired)(char *);
 391         /* send oplock break response */
 392         int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
 393                                struct cifsInodeInfo *);
 394         /* query remote filesystem */
 395         int (*queryfs)(const unsigned int, struct cifs_tcon *,
 396                        struct kstatfs *);
 397         /* send mandatory brlock to the server */
 398         int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
 399                          __u64, __u32, int, int, bool);
 400         /* unlock range of mandatory locks */
 401         int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
 402                                  const unsigned int);
 403         /* push brlocks from the cache to the server */
 404         int (*push_mand_locks)(struct cifsFileInfo *);
 405         /* get lease key of the inode */
 406         void (*get_lease_key)(struct inode *, struct cifs_fid *);
 407         /* set lease key of the inode */
 408         void (*set_lease_key)(struct inode *, struct cifs_fid *);
 409         /* generate new lease key */
 410         void (*new_lease_key)(struct cifs_fid *);
 411         int (*generate_signingkey)(struct cifs_ses *);
 412         int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
 413         int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
 414                              struct cifsFileInfo *src_file);
 415         int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
 416                              struct cifsFileInfo *src_file, void __user *);
 417         int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
 418                                 struct cifs_sb_info *, const unsigned char *,
 419                                 char *, unsigned int *);
 420         int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
 421                                  struct cifs_sb_info *, const unsigned char *,
 422                                  char *, unsigned int *);
 423         /* if we can do cache read operations */
 424         bool (*is_read_op)(__u32);
 425         /* set oplock level for the inode */
 426         void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
 427                                  bool *);
 428         /* create lease context buffer for CREATE request */
 429         char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
 430         /* parse lease context buffer and return oplock/epoch info */
 431         __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
 432         ssize_t (*copychunk_range)(const unsigned int,
 433                         struct cifsFileInfo *src_file,
 434                         struct cifsFileInfo *target_file,
 435                         u64 src_off, u64 len, u64 dest_off);
 436         int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
 437                         struct cifsFileInfo *target_file, u64 src_off, u64 len,
 438                         u64 dest_off);
 439         int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
 440         ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
 441                         const unsigned char *, const unsigned char *, char *,
 442                         size_t, struct cifs_sb_info *);
 443         int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
 444                         const char *, const void *, const __u16,
 445                         const struct nls_table *, struct cifs_sb_info *);
 446         struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
 447                         const char *, u32 *);
 448         struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
 449                         const struct cifs_fid *, u32 *);
 450         int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
 451                         int);
 452         /* writepages retry size */
 453         unsigned int (*wp_retry_size)(struct inode *);
 454         /* get mtu credits */
 455         int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
 456                                 unsigned int *, unsigned int *);
 457         /* check if we need to issue closedir */
 458         bool (*dir_needs_close)(struct cifsFileInfo *);
 459         long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
 460                           loff_t);
 461         /* init transform request - used for encryption for now */
 462         int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
 463                                  struct smb_rqst *, struct smb_rqst *);
 464         int (*is_transform_hdr)(void *buf);
 465         int (*receive_transform)(struct TCP_Server_Info *,
 466                                  struct mid_q_entry **, char **, int *);
 467         enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
 468                             enum securityEnum);
 469         int (*next_header)(char *);
 470 };
 471
 472 struct smb_version_values {
 473         char            *version_string;
 474         __u16           protocol_id;
 475         __u32           req_capabilities;
 476         __u32           large_lock_type;
 477         __u32           exclusive_lock_type;
 478         __u32           shared_lock_type;
 479         __u32           unlock_lock_type;
 480         size_t          header_preamble_size;
 481         size_t          header_size;
 482         size_t          max_header_size;
 483         size_t          read_rsp_size;
 484         __le16          lock_cmd;
 485         unsigned int    cap_unix;
 486         unsigned int    cap_nt_find;
 487         unsigned int    cap_large_files;
 488         __u16           signing_enabled;
 489         __u16           signing_required;
 490         size_t          create_lease_size;
 491 };
 492
 493 #define HEADER_SIZE(server) (server->vals->header_size)
 494 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
 495
 496 struct smb_vol {
 497         char *username;
 498         char *password;
 499         char *domainname;
 500         char *UNC;
 501         char *iocharset;  /* local code page for mapping to and from Unicode */
 502         char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
 503         char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
 504         kuid_t cred_uid;
 505         kuid_t linux_uid;
 506         kgid_t linux_gid;
 507         kuid_t backupuid;
 508         kgid_t backupgid;
 509         umode_t file_mode;
 510         umode_t dir_mode;
 511         enum securityEnum sectype; /* sectype requested via mnt opts */
 512         bool sign; /* was signing requested via mnt opts? */
 513         bool retry:1;
 514         bool intr:1;
 515         bool setuids:1;
 516         bool setuidfromacl:1;
 517         bool override_uid:1;
 518         bool override_gid:1;
 519         bool dynperm:1;
 520         bool noperm:1;
 521         bool no_psx_acl:1; /* set if posix acl support should be disabled */
 522         bool cifs_acl:1;
 523         bool backupuid_specified; /* mount option  backupuid  is specified */
 524         bool backupgid_specified; /* mount option  backupgid  is specified */
 525         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
 526         bool server_ino:1; /* use inode numbers from server ie UniqueId */
 527         bool direct_io:1;
 528         bool strict_io:1; /* strict cache behavior */
 529         bool remap:1;      /* set to remap seven reserved chars in filenames */
 530         bool sfu_remap:1;  /* remap seven reserved chars ala SFU */
 531         bool posix_paths:1; /* unset to not ask for posix pathnames. */
 532         bool no_linux_ext:1;
 533         bool linux_ext:1;
 534         bool sfu_emul:1;
 535         bool nullauth:1;   /* attempt to authenticate with null user */
 536         bool nocase:1;     /* request case insensitive filenames */
 537         bool nobrl:1;      /* disable sending byte range locks to srv */
 538         bool nohandlecache:1; /* disable caching dir handles if srvr probs */
 539         bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
 540         bool seal:1;       /* request transport encryption on share */
 541         bool nodfs:1;      /* Do not request DFS, even if available */
 542         bool local_lease:1; /* check leases only on local system, not remote */
 543         bool noblocksnd:1;
 544         bool noautotune:1;
 545         bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
 546         bool fsc:1;     /* enable fscache */
 547         bool mfsymlinks:1; /* use Minshall+French Symlinks */
 548         bool multiuser:1;
 549         bool rwpidforward:1; /* pid forward for read/write operations */
 550         bool nosharesock:1;
 551         bool persistent:1;
 552         bool nopersistent:1;
 553         bool resilient:1; /* noresilient not required since not fored for CA */
 554         bool domainauto:1;
 555         bool rdma:1;
 556         unsigned int rsize;
 557         unsigned int wsize;
 558         bool sockopt_tcp_nodelay:1;
 559         unsigned long actimeo; /* attribute cache timeout (jiffies) */
 560         struct smb_version_operations *ops;
 561         struct smb_version_values *vals;
 562         char *prepath;
 563         struct sockaddr_storage dstaddr; /* destination address */
 564         struct sockaddr_storage srcaddr; /* allow binding to a local IP */
 565         struct nls_table *local_nls;
 566         unsigned int echo_interval; /* echo interval in secs */
 567         __u64 snapshot_time; /* needed for timewarp tokens */
 568         unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
 569 };
 570
 571 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
 572                          CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
 573                          CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
 574                          CIFS_MOUNT_MAP_SFM_CHR | \
 575                          CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
 576                          CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
 577                          CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
 578                          CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
 579                          CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
 580                          CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
 581                          CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
 582
 583 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
 584                       SB_NODEV | SB_SYNCHRONOUS)
 585
 586 struct cifs_mnt_data {
 587         struct cifs_sb_info *cifs_sb;
 588         struct smb_vol *vol;
 589         int flags;
 590 };
 591
 592 static inline unsigned int
 593 get_rfc1002_length(void *buf)
 594 {
 595         return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
 596 }
 597
 598 static inline void
 599 inc_rfc1001_len(void *buf, int count)
 600 {
 601         be32_add_cpu((__be32 *)buf, count);
 602 }
 603
 604 struct TCP_Server_Info {
 605         struct list_head tcp_ses_list;
 606         struct list_head smb_ses_list;
 607         int srv_count; /* reference counter */
 608         /* 15 character server name + 0x20 16th byte indicating type = srv */
 609         char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 610         struct smb_version_operations   *ops;
 611         struct smb_version_values       *vals;
 612         enum statusEnum tcpStatus; /* what we think the status is */
 613         char *hostname; /* hostname portion of UNC string */
 614         struct socket *ssocket;
 615         struct sockaddr_storage dstaddr;
 616         struct sockaddr_storage srcaddr; /* locally bind to this IP */
 617 #ifdef CONFIG_NET_NS
 618         struct net *net;
 619 #endif
 620         wait_queue_head_t response_q;
 621         wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 622         struct list_head pending_mid_q;
 623         bool noblocksnd;                /* use blocking sendmsg */
 624         bool noautotune;                /* do not autotune send buf sizes */
 625         bool tcp_nodelay;
 626         unsigned int credits;  /* send no more requests at once */
 627         unsigned int max_credits; /* can override large 32000 default at mnt */
 628         unsigned int in_flight;  /* number of requests on the wire to server */
 629         spinlock_t req_lock;  /* protect the two values above */
 630         struct mutex srv_mutex;
 631         struct task_struct *tsk;
 632         char server_GUID[16];
 633         __u16 sec_mode;
 634         bool sign; /* is signing enabled on this connection? */
 635         bool session_estab; /* mark when very first sess is established */
 636         int echo_credits;  /* echo reserved slots */
 637         int oplock_credits;  /* oplock break reserved slots */
 638         bool echoes:1; /* enable echoes */
 639         __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
 640         u16 dialect; /* dialect index that server chose */
 641         bool oplocks:1; /* enable oplocks */
 642         unsigned int maxReq;    /* Clients should submit no more */
 643         /* than maxReq distinct unanswered SMBs to the server when using  */
 644         /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
 645         unsigned int maxBuf;    /* maxBuf specifies the maximum */
 646         /* message size the server can send or receive for non-raw SMBs */
 647         /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
 648         /* when socket is setup (and during reconnect) before NegProt sent */
 649         unsigned int max_rw;    /* maxRw specifies the maximum */
 650         /* message size the server can send or receive for */
 651         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 652         unsigned int capabilities; /* selective disabling of caps by smb sess */
 653         int timeAdj;  /* Adjust for difference in server time zone in sec */
 654         __u64 CurrentMid;         /* multiplex id - rotating counter */
 655         char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
 656         /* 16th byte of RFC1001 workstation name is always null */
 657         char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 658         __u32 sequence_number; /* for signing, protected by srv_mutex */
 659         struct session_key session_key;
 660         unsigned long lstrp; /* when we got last response from this server */
 661         struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
 662 #define CIFS_NEGFLAVOR_LANMAN   0       /* wct == 13, LANMAN */
 663 #define CIFS_NEGFLAVOR_UNENCAP  1       /* wct == 17, but no ext_sec */
 664 #define CIFS_NEGFLAVOR_EXTENDED 2       /* wct == 17, ext_sec bit set */
 665         char    negflavor;      /* NEGOTIATE response flavor */
 666         /* extended security flavors that server supports */
 667         bool    sec_ntlmssp;            /* supports NTLMSSP */
 668         bool    sec_kerberosu2u;        /* supports U2U Kerberos */
 669         bool    sec_kerberos;           /* supports plain Kerberos */
 670         bool    sec_mskerberos;         /* supports legacy MS Kerberos */
 671         bool    large_buf;              /* is current buffer large? */
 672         /* use SMBD connection instead of socket */
 673         bool    rdma;
 674         /* point to the SMBD connection if RDMA is used instead of socket */
 675         struct smbd_connection *smbd_conn;
 676         struct delayed_work     echo; /* echo ping workqueue job */
 677         char    *smallbuf;      /* pointer to current "small" buffer */
 678         char    *bigbuf;        /* pointer to current "big" buffer */
 679         /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
 680         unsigned int pdu_size;
 681         unsigned int total_read; /* total amount of data read in this pass */
 682 #ifdef CONFIG_CIFS_FSCACHE
 683         struct fscache_cookie   *fscache; /* client index cache cookie */
 684 #endif
 685 #ifdef CONFIG_CIFS_STATS2
 686         atomic_t in_send; /* requests trying to send */
 687         atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 688         atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
 689 #endif /* STATS2 */
 690         unsigned int    max_read;
 691         unsigned int    max_write;
 692         __le16  cipher_type;
 693          /* save initital negprot hash */
 694         __u8    preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
 695         bool    posix_ext_supported;
 696         struct delayed_work reconnect; /* reconnect workqueue job */
 697         struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
 698         unsigned long echo_interval;
 699 };
 700
 701 static inline unsigned int
 702 in_flight(struct TCP_Server_Info *server)
 703 {
 704         unsigned int num;
 705         spin_lock(&server->req_lock);
 706         num = server->in_flight;
 707         spin_unlock(&server->req_lock);
 708         return num;
 709 }
 710
 711 static inline bool
 712 has_credits(struct TCP_Server_Info *server, int *credits)
 713 {
 714         int num;
 715         spin_lock(&server->req_lock);
 716         num = *credits;
 717         spin_unlock(&server->req_lock);
 718         return num > 0;
 719 }
 720
 721 static inline void
 722 add_credits(struct TCP_Server_Info *server, const unsigned int add,
 723             const int optype)
 724 {
 725         server->ops->add_credits(server, add, optype);
 726 }
 727
 728 static inline void
 729 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
 730                         const int optype)
 731 {
 732         if (add) {
 733                 server->ops->add_credits(server, add, optype);
 734                 wake_up(&server->request_q);
 735         }
 736 }
 737
 738 static inline void
 739 set_credits(struct TCP_Server_Info *server, const int val)
 740 {
 741         server->ops->set_credits(server, val);
 742 }
 743
 744 static inline __le64
 745 get_next_mid64(struct TCP_Server_Info *server)
 746 {
 747         return cpu_to_le64(server->ops->get_next_mid(server));
 748 }
 749
 750 static inline __le16
 751 get_next_mid(struct TCP_Server_Info *server)
 752 {
 753         __u16 mid = server->ops->get_next_mid(server);
 754         /*
 755          * The value in the SMB header should be little endian for easy
 756          * on-the-wire decoding.
 757          */
 758         return cpu_to_le16(mid);
 759 }
 760
 761 static inline void
 762 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 763 {
 764         if (server->ops->revert_current_mid)
 765                 server->ops->revert_current_mid(server, val);
 766 }
 767
 768 static inline void
 769 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
 770                             const struct smb2_sync_hdr *shdr)
 771 {
 772         unsigned int num = le16_to_cpu(shdr->CreditCharge);
 773
 774         return revert_current_mid(server, num > 0 ? num : 1);
 775 }
 776
 777 static inline __u16
 778 get_mid(const struct smb_hdr *smb)
 779 {
 780         return le16_to_cpu(smb->Mid);
 781 }
 782
 783 static inline bool
 784 compare_mid(__u16 mid, const struct smb_hdr *smb)
 785 {
 786         return mid == le16_to_cpu(smb->Mid);
 787 }
 788
 789 /*
 790  * When the server supports very large reads and writes via POSIX extensions,
 791  * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
 792  * including the RFC1001 length.
 793  *
 794  * Note that this might make for "interesting" allocation problems during
 795  * writeback however as we have to allocate an array of pointers for the
 796  * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
 797  *
 798  * For reads, there is a similar problem as we need to allocate an array
 799  * of kvecs to handle the receive, though that should only need to be done
 800  * once.
 801  */
 802 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
 803 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
 804
 805 /*
 806  * When the server doesn't allow large posix writes, only allow a rsize/wsize
 807  * of 2^17-1 minus the size of the call header. That allows for a read or
 808  * write up to the maximum size described by RFC1002.
 809  */
 810 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
 811 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
 812
 813 /*
 814  * The default wsize is 1M. find_get_pages seems to return a maximum of 256
 815  * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
 816  * a single wsize request with a single call.
 817  */
 818 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
 819
 820 /*
 821  * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
 822  * those values when posix extensions aren't in force. In actuality here, we
 823  * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
 824  * to be ok with the extra byte even though Windows doesn't send writes that
 825  * are that large.
 826  *
 827  * Citation:
 828  *
 829  * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
 830  */
 831 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
 832 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
 833
 834 /*
 835  * Macros to allow the TCP_Server_Info->net field and related code to drop out
 836  * when CONFIG_NET_NS isn't set.
 837  */
 838
 839 #ifdef CONFIG_NET_NS
 840
 841 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 842 {
 843         return srv->net;
 844 }
 845
 846 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 847 {
 848         srv->net = net;
 849 }
 850
 851 #else
 852
 853 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 854 {
 855         return &init_net;
 856 }
 857
 858 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 859 {
 860 }
 861
 862 #endif
 863
 864 struct cifs_server_iface {
 865         size_t speed;
 866         unsigned int rdma_capable : 1;
 867         unsigned int rss_capable : 1;
 868         struct sockaddr_storage sockaddr;
 869 };
 870
 871 /*
 872  * Session structure.  One of these for each uid session with a particular host
 873  */
 874 struct cifs_ses {
 875         struct list_head smb_ses_list;
 876         struct list_head tcon_list;
 877         struct cifs_tcon *tcon_ipc;
 878         struct mutex session_mutex;
 879         struct TCP_Server_Info *server; /* pointer to server info */
 880         int ses_count;          /* reference counter */
 881         enum statusEnum status;
 882         unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 883         char *serverOS;         /* name of operating system underlying server */
 884         char *serverNOS;        /* name of network operating system of server */
 885         char *serverDomain;     /* security realm of server */
 886         __u64 Suid;             /* remote smb uid  */
 887         kuid_t linux_uid;       /* overriding owner of files on the mount */
 888         kuid_t cred_uid;        /* owner of credentials */
 889         unsigned int capabilities;
 890         char serverName[SERVER_NAME_LEN_WITH_NULL];
 891         char *user_name;        /* must not be null except during init of sess
 892                                    and after mount option parsing we fill it */
 893         char *domainName;
 894         char *password;
 895         struct session_key auth_key;
 896         struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
 897         enum securityEnum sectype; /* what security flavor was specified? */
 898         bool sign;              /* is signing required? */
 899         bool need_reconnect:1; /* connection reset, uid now invalid */
 900         bool domainAuto:1;
 901         __u16 session_flags;
 902         __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
 903         __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
 904         __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
 905         __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
 906
 907         /*
 908          * Network interfaces available on the server this session is
 909          * connected to.
 910          *
 911          * Other channels can be opened by connecting and binding this
 912          * session to interfaces from this list.
 913          *
 914          * iface_lock should be taken when accessing any of these fields
 915          */
 916         spinlock_t iface_lock;
 917         struct cifs_server_iface *iface_list;
 918         size_t iface_count;
 919         unsigned long iface_last_update; /* jiffies */
 920 };
 921
 922 static inline bool
 923 cap_unix(struct cifs_ses *ses)
 924 {
 925         return ses->server->vals->cap_unix & ses->capabilities;
 926 }
 927
 928 struct cached_fid {
 929         bool is_valid:1;        /* Do we have a useable root fid */
 930         struct kref refcount;
 931         struct cifs_fid *fid;
 932         struct mutex fid_mutex;
 933         struct cifs_tcon *tcon;
 934         struct work_struct lease_break;
 935 };
 936
 937 /*
 938  * there is one of these for each connection to a resource on a particular
 939  * session
 940  */
 941 struct cifs_tcon {
 942         struct list_head tcon_list;
 943         int tc_count;
 944         struct list_head rlist; /* reconnect list */
 945         struct list_head openFileList;
 946         spinlock_t open_file_lock; /* protects list above */
 947         struct cifs_ses *ses;   /* pointer to session associated with */
 948         char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 949         char *nativeFileSystem;
 950         char *password;         /* for share-level security */
 951         __u32 tid;              /* The 4 byte tree id */
 952         __u16 Flags;            /* optional support bits */
 953         enum statusEnum tidStatus;
 954         atomic_t num_smbs_sent;
 955         union {
 956                 struct {
 957                         atomic_t num_writes;
 958                         atomic_t num_reads;
 959                         atomic_t num_flushes;
 960                         atomic_t num_oplock_brks;
 961                         atomic_t num_opens;
 962                         atomic_t num_closes;
 963                         atomic_t num_deletes;
 964                         atomic_t num_mkdirs;
 965                         atomic_t num_posixopens;
 966                         atomic_t num_posixmkdirs;
 967                         atomic_t num_rmdirs;
 968                         atomic_t num_renames;
 969                         atomic_t num_t2renames;
 970                         atomic_t num_ffirst;
 971                         atomic_t num_fnext;
 972                         atomic_t num_fclose;
 973                         atomic_t num_hardlinks;
 974                         atomic_t num_symlinks;
 975                         atomic_t num_locks;
 976                         atomic_t num_acl_get;
 977                         atomic_t num_acl_set;
 978                 } cifs_stats;
 979                 struct {
 980                         atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
 981                         atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
 982                 } smb2_stats;
 983         } stats;
 984         __u64    bytes_read;
 985         __u64    bytes_written;
 986         spinlock_t stat_lock;  /* protects the two fields above */
 987         FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 988         FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 989         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 990         bool ipc:1;   /* set if connection to IPC$ share (always also pipe) */
 991         bool pipe:1;  /* set if connection to pipe share */
 992         bool print:1; /* set if connection to printer share */
 993         bool retry:1;
 994         bool nocase:1;
 995         bool nohandlecache:1; /* if strange server resource prob can turn off */
 996         bool seal:1;      /* transport encryption for this mounted share */
 997         bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 998                                 for this mount even if server would support */
 999         bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1000         bool local_lease:1; /* check leases (only) on local system not remote */
1001         bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1002         bool broken_sparse_sup; /* if server or share does not support sparse */
1003         bool need_reconnect:1; /* connection reset, tid now invalid */
1004         bool need_reopen_files:1; /* need to reopen tcon file handles */
1005         bool use_resilient:1; /* use resilient instead of durable handles */
1006         bool use_persistent:1; /* use persistent instead of durable handles */
1007         __le32 capabilities;
1008         __u32 share_flags;
1009         __u32 maximal_access;
1010         __u32 vol_serial_number;
1011         __le64 vol_create_time;
1012         __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1013         __u32 ss_flags;         /* sector size flags */
1014         __u32 perf_sector_size; /* best sector size for perf */
1015         __u32 max_chunks;
1016         __u32 max_bytes_chunk;
1017         __u32 max_bytes_copy;
1018 #ifdef CONFIG_CIFS_FSCACHE
1019         u64 resource_id;                /* server resource id */
1020         struct fscache_cookie *fscache; /* cookie for share */
1021 #endif
1022         struct list_head pending_opens; /* list of incomplete opens */
1023         struct cached_fid crfid; /* Cached root fid */
1024         /* BB add field for back pointer to sb struct(s)? */
1025 };
1026
1027 /*
1028  * This is a refcounted and timestamped container for a tcon pointer. The
1029  * container holds a tcon reference. It is considered safe to free one of
1030  * these when the tl_count goes to 0. The tl_time is the time of the last
1031  * "get" on the container.
1032  */
1033 struct tcon_link {
1034         struct rb_node          tl_rbnode;
1035         kuid_t                  tl_uid;
1036         unsigned long           tl_flags;
1037 #define TCON_LINK_MASTER        0
1038 #define TCON_LINK_PENDING       1
1039 #define TCON_LINK_IN_TREE       2
1040         unsigned long           tl_time;
1041         atomic_t                tl_count;
1042         struct cifs_tcon        *tl_tcon;
1043 };
1044
1045 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1046 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1047
1048 static inline struct cifs_tcon *
1049 tlink_tcon(struct tcon_link *tlink)
1050 {
1051         return tlink->tl_tcon;
1052 }
1053
1054 static inline struct tcon_link *
1055 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1056 {
1057         return cifs_sb->master_tlink;
1058 }
1059
1060 extern void cifs_put_tlink(struct tcon_link *tlink);
1061
1062 static inline struct tcon_link *
1063 cifs_get_tlink(struct tcon_link *tlink)
1064 {
1065         if (tlink && !IS_ERR(tlink))
1066                 atomic_inc(&tlink->tl_count);
1067         return tlink;
1068 }
1069
1070 /* This function is always expected to succeed */
1071 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1072
1073 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1074
1075 struct cifs_pending_open {
1076         struct list_head olist;
1077         struct tcon_link *tlink;
1078         __u8 lease_key[16];
1079         __u32 oplock;
1080 };
1081
1082 /*
1083  * This info hangs off the cifsFileInfo structure, pointed to by llist.
1084  * This is used to track byte stream locks on the file
1085  */
1086 struct cifsLockInfo {
1087         struct list_head llist; /* pointer to next cifsLockInfo */
1088         struct list_head blist; /* pointer to locks blocked on this */
1089         wait_queue_head_t block_q;
1090         __u64 offset;
1091         __u64 length;
1092         __u32 pid;
1093         __u32 type;
1094 };
1095
1096 /*
1097  * One of these for each open instance of a file
1098  */
1099 struct cifs_search_info {
1100         loff_t index_of_last_entry;
1101         __u16 entries_in_buffer;
1102         __u16 info_level;
1103         __u32 resume_key;
1104         char *ntwrk_buf_start;
1105         char *srch_entries_start;
1106         char *last_entry;
1107         const char *presume_name;
1108         unsigned int resume_name_len;
1109         bool endOfSearch:1;
1110         bool emptyDir:1;
1111         bool unicode:1;
1112         bool smallBuf:1; /* so we know which buf_release function to call */
1113 };
1114
1115 struct cifs_open_parms {
1116         struct cifs_tcon *tcon;
1117         struct cifs_sb_info *cifs_sb;
1118         int disposition;
1119         int desired_access;
1120         int create_options;
1121         const char *path;
1122         struct cifs_fid *fid;
1123         umode_t mode;
1124         bool reconnect:1;
1125 };
1126
1127 struct cifs_fid {
1128         __u16 netfid;
1129         __u64 persistent_fid;   /* persist file id for smb2 */
1130         __u64 volatile_fid;     /* volatile file id for smb2 */
1131         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for smb2 */
1132         __u8 create_guid[16];
1133         struct cifs_pending_open *pending_open;
1134         unsigned int epoch;
1135         bool purge_cache;
1136 };
1137
1138 struct cifs_fid_locks {
1139         struct list_head llist;
1140         struct cifsFileInfo *cfile;     /* fid that owns locks */
1141         struct list_head locks;         /* locks held by fid above */
1142 };
1143
1144 struct cifsFileInfo {
1145         /* following two lists are protected by tcon->open_file_lock */
1146         struct list_head tlist; /* pointer to next fid owned by tcon */
1147         struct list_head flist; /* next fid (file instance) for this inode */
1148         /* lock list below protected by cifsi->lock_sem */
1149         struct cifs_fid_locks *llist;   /* brlocks held by this fid */
1150         kuid_t uid;             /* allows finding which FileInfo structure */
1151         __u32 pid;              /* process id who opened file */
1152         struct cifs_fid fid;    /* file id from remote */
1153         struct list_head rlist; /* reconnect list */
1154         /* BB add lock scope info here if needed */ ;
1155         /* lock scope id (0 if none) */
1156         struct dentry *dentry;
1157         struct tcon_link *tlink;
1158         unsigned int f_flags;
1159         bool invalidHandle:1;   /* file closed via session abend */
1160         bool oplock_break_cancelled:1;
1161         int count;
1162         spinlock_t file_info_lock; /* protects four flag/count fields above */
1163         struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1164         struct cifs_search_info srch_inf;
1165         struct work_struct oplock_break; /* work for oplock breaks */
1166 };
1167
1168 struct cifs_io_parms {
1169         __u16 netfid;
1170         __u64 persistent_fid;   /* persist file id for smb2 */
1171         __u64 volatile_fid;     /* volatile file id for smb2 */
1172         __u32 pid;
1173         __u64 offset;
1174         unsigned int length;
1175         struct cifs_tcon *tcon;
1176 };
1177
1178 struct cifs_aio_ctx {
1179         struct kref             refcount;
1180         struct list_head        list;
1181         struct mutex            aio_mutex;
1182         struct completion       done;
1183         struct iov_iter         iter;
1184         struct kiocb            *iocb;
1185         struct cifsFileInfo     *cfile;
1186         struct bio_vec          *bv;
1187         loff_t                  pos;
1188         unsigned int            npages;
1189         ssize_t                 rc;
1190         unsigned int            len;
1191         unsigned int            total_len;
1192         bool                    should_dirty;
1193 };
1194
1195 struct cifs_readdata;
1196
1197 /* asynchronous read support */
1198 struct cifs_readdata {
1199         struct kref                     refcount;
1200         struct list_head                list;
1201         struct completion               done;
1202         struct cifsFileInfo             *cfile;
1203         struct address_space            *mapping;
1204         struct cifs_aio_ctx             *ctx;
1205         __u64                           offset;
1206         unsigned int                    bytes;
1207         unsigned int                    got_bytes;
1208         pid_t                           pid;
1209         int                             result;
1210         struct work_struct              work;
1211         int (*read_into_pages)(struct TCP_Server_Info *server,
1212                                 struct cifs_readdata *rdata,
1213                                 unsigned int len);
1214         int (*copy_into_pages)(struct TCP_Server_Info *server,
1215                                 struct cifs_readdata *rdata,
1216                                 struct iov_iter *iter);
1217         struct kvec                     iov[2];
1218 #ifdef CONFIG_CIFS_SMB_DIRECT
1219         struct smbd_mr                  *mr;
1220 #endif
1221         unsigned int                    pagesz;
1222         unsigned int                    page_offset;
1223         unsigned int                    tailsz;
1224         unsigned int                    credits;
1225         unsigned int                    nr_pages;
1226         struct page                     **pages;
1227 };
1228
1229 struct cifs_writedata;
1230
1231 /* asynchronous write support */
1232 struct cifs_writedata {
1233         struct kref                     refcount;
1234         struct list_head                list;
1235         struct completion               done;
1236         enum writeback_sync_modes       sync_mode;
1237         struct work_struct              work;
1238         struct cifsFileInfo             *cfile;
1239         struct cifs_aio_ctx             *ctx;
1240         __u64                           offset;
1241         pid_t                           pid;
1242         unsigned int                    bytes;
1243         int                             result;
1244 #ifdef CONFIG_CIFS_SMB_DIRECT
1245         struct smbd_mr                  *mr;
1246 #endif
1247         unsigned int                    pagesz;
1248         unsigned int                    page_offset;
1249         unsigned int                    tailsz;
1250         unsigned int                    credits;
1251         unsigned int                    nr_pages;
1252         struct page                     **pages;
1253 };
1254
1255 /*
1256  * Take a reference on the file private data. Must be called with
1257  * cfile->file_info_lock held.
1258  */
1259 static inline void
1260 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1261 {
1262         ++cifs_file->count;
1263 }
1264
1265 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1266 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr);
1267 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1268
1269 #define CIFS_CACHE_READ_FLG     1
1270 #define CIFS_CACHE_HANDLE_FLG   2
1271 #define CIFS_CACHE_RH_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1272 #define CIFS_CACHE_WRITE_FLG    4
1273 #define CIFS_CACHE_RW_FLG       (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1274 #define CIFS_CACHE_RHW_FLG      (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1275
1276 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1277 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1278 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1279
1280 /*
1281  * One of these for each file inode
1282  */
1283
1284 struct cifsInodeInfo {
1285         bool can_cache_brlcks;
1286         struct list_head llist; /* locks helb by this inode */
1287         struct rw_semaphore lock_sem;   /* protect the fields above */
1288         /* BB add in lists for dirty pages i.e. write caching info for oplock */
1289         struct list_head openFileList;
1290         __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1291         unsigned int oplock;            /* oplock/lease level we have */
1292         unsigned int epoch;             /* used to track lease state changes */
1293 #define CIFS_INODE_PENDING_OPLOCK_BREAK   (0) /* oplock break in progress */
1294 #define CIFS_INODE_PENDING_WRITERS        (1) /* Writes in progress */
1295 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1296 #define CIFS_INO_DELETE_PENDING           (3) /* delete pending on server */
1297 #define CIFS_INO_INVALID_MAPPING          (4) /* pagecache is invalid */
1298 #define CIFS_INO_LOCK                     (5) /* lock bit for synchronization */
1299         unsigned long flags;
1300         spinlock_t writers_lock;
1301         unsigned int writers;           /* Number of writers on this inode */
1302         unsigned long time;             /* jiffies of last update of inode */
1303         u64  server_eof;                /* current file size on server -- protected by i_lock */
1304         u64  uniqueid;                  /* server inode number */
1305         u64  createtime;                /* creation time on server */
1306         __u8 lease_key[SMB2_LEASE_KEY_SIZE];    /* lease key for this inode */
1307 #ifdef CONFIG_CIFS_FSCACHE
1308         struct fscache_cookie *fscache;
1309 #endif
1310         struct inode vfs_inode;
1311 };
1312
1313 static inline struct cifsInodeInfo *
1314 CIFS_I(struct inode *inode)
1315 {
1316         return container_of(inode, struct cifsInodeInfo, vfs_inode);
1317 }
1318
1319 static inline struct cifs_sb_info *
1320 CIFS_SB(struct super_block *sb)
1321 {
1322         return sb->s_fs_info;
1323 }
1324
1325 static inline struct cifs_sb_info *
1326 CIFS_FILE_SB(struct file *file)
1327 {
1328         return CIFS_SB(file_inode(file)->i_sb);
1329 }
1330
1331 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1332 {
1333         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1334                 return '/';
1335         else
1336                 return '\\';
1337 }
1338
1339 static inline void
1340 convert_delimiter(char *path, char delim)
1341 {
1342         char old_delim, *pos;
1343
1344         if (delim == '/')
1345                 old_delim = '\\';
1346         else
1347                 old_delim = '/';
1348
1349         pos = path;
1350         while ((pos = strchr(pos, old_delim)))
1351                 *pos = delim;
1352 }
1353
1354 #define cifs_stats_inc atomic_inc
1355
1356 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1357                                             unsigned int bytes)
1358 {
1359         if (bytes) {
1360                 spin_lock(&tcon->stat_lock);
1361                 tcon->bytes_written += bytes;
1362                 spin_unlock(&tcon->stat_lock);
1363         }
1364 }
1365
1366 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1367                                          unsigned int bytes)
1368 {
1369         spin_lock(&tcon->stat_lock);
1370         tcon->bytes_read += bytes;
1371         spin_unlock(&tcon->stat_lock);
1372 }
1373
1374
1375 /*
1376  * This is the prototype for the mid receive function. This function is for
1377  * receiving the rest of the SMB frame, starting with the WordCount (which is
1378  * just after the MID in struct smb_hdr). Note:
1379  *
1380  * - This will be called by cifsd, with no locks held.
1381  * - The mid will still be on the pending_mid_q.
1382  * - mid->resp_buf will point to the current buffer.
1383  *
1384  * Returns zero on a successful receive, or an error. The receive state in
1385  * the TCP_Server_Info will also be updated.
1386  */
1387 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1388                             struct mid_q_entry *mid);
1389
1390 /*
1391  * This is the prototype for the mid callback function. This is called once the
1392  * mid has been received off of the socket. When creating one, take special
1393  * care to avoid deadlocks. Things to bear in mind:
1394  *
1395  * - it will be called by cifsd, with no locks held
1396  * - the mid will be removed from any lists
1397  */
1398 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1399
1400 /*
1401  * This is the protopyte for mid handle function. This is called once the mid
1402  * has been recognized after decryption of the message.
1403  */
1404 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1405                             struct mid_q_entry *mid);
1406
1407 /* one of these for every pending CIFS request to the server */
1408 struct mid_q_entry {
1409         struct list_head qhead; /* mids waiting on reply from this server */
1410         struct kref refcount;
1411         struct TCP_Server_Info *server; /* server corresponding to this mid */
1412         __u64 mid;              /* multiplex id */
1413         __u16 credits;          /* number of credits consumed by this mid */
1414         __u32 pid;              /* process id */
1415         __u32 sequence_number;  /* for CIFS signing */
1416         unsigned long when_alloc;  /* when mid was created */
1417 #ifdef CONFIG_CIFS_STATS2
1418         unsigned long when_sent; /* time when smb send finished */
1419         unsigned long when_received; /* when demux complete (taken off wire) */
1420 #endif
1421         mid_receive_t *receive; /* call receive callback */
1422         mid_callback_t *callback; /* call completion callback */
1423         mid_handle_t *handle; /* call handle mid callback */
1424         void *callback_data;      /* general purpose pointer for callback */
1425         void *resp_buf;         /* pointer to received SMB header */
1426         unsigned int resp_buf_size;
1427         int mid_state;  /* wish this were enum but can not pass to wait_event */
1428         unsigned int mid_flags;
1429         __le16 command;         /* smb command code */
1430         bool large_buf:1;       /* if valid response, is pointer to large buf */
1431         bool multiRsp:1;        /* multiple trans2 responses for one request  */
1432         bool multiEnd:1;        /* both received */
1433         bool decrypted:1;       /* decrypted entry */
1434 };
1435
1436 struct close_cancelled_open {
1437         struct cifs_fid         fid;
1438         struct cifs_tcon        *tcon;
1439         struct work_struct      work;
1440 };
1441
1442 /*      Make code in transport.c a little cleaner by moving
1443         update of optional stats into function below */
1444 #ifdef CONFIG_CIFS_STATS2
1445
1446 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1447 {
1448         atomic_inc(&server->in_send);
1449 }
1450
1451 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1452 {
1453         atomic_dec(&server->in_send);
1454 }
1455
1456 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1457 {
1458         atomic_inc(&server->num_waiters);
1459 }
1460
1461 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1462 {
1463         atomic_dec(&server->num_waiters);
1464 }
1465
1466 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1467 {
1468         mid->when_sent = jiffies;
1469 }
1470 #else
1471 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1472 {
1473 }
1474 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1475 {
1476 }
1477
1478 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1479 {
1480 }
1481
1482 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1483 {
1484 }
1485
1486 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1487 {
1488 }
1489 #endif
1490
1491 /* for pending dnotify requests */
1492 struct dir_notify_req {
1493         struct list_head lhead;
1494         __le16 Pid;
1495         __le16 PidHigh;
1496         __u16 Mid;
1497         __u16 Tid;
1498         __u16 Uid;
1499         __u16 netfid;
1500         __u32 filter; /* CompletionFilter (for multishot) */
1501         int multishot;
1502         struct file *pfile;
1503 };
1504
1505 struct dfs_info3_param {
1506         int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1507         int path_consumed;
1508         int server_type;
1509         int ref_flag;
1510         char *path_name;
1511         char *node_name;
1512 };
1513
1514 /*
1515  * common struct for holding inode info when searching for or updating an
1516  * inode with new info
1517  */
1518
1519 #define CIFS_FATTR_DFS_REFERRAL         0x1
1520 #define CIFS_FATTR_DELETE_PENDING       0x2
1521 #define CIFS_FATTR_NEED_REVAL           0x4
1522 #define CIFS_FATTR_INO_COLLISION        0x8
1523 #define CIFS_FATTR_UNKNOWN_NLINK        0x10
1524 #define CIFS_FATTR_FAKE_ROOT_INO        0x20
1525
1526 struct cifs_fattr {
1527         u32             cf_flags;
1528         u32             cf_cifsattrs;
1529         u64             cf_uniqueid;
1530         u64             cf_eof;
1531         u64             cf_bytes;
1532         u64             cf_createtime;
1533         kuid_t          cf_uid;
1534         kgid_t          cf_gid;
1535         umode_t         cf_mode;
1536         dev_t           cf_rdev;
1537         unsigned int    cf_nlink;
1538         unsigned int    cf_dtype;
1539         struct timespec64 cf_atime;
1540         struct timespec64 cf_mtime;
1541         struct timespec64 cf_ctime;
1542 };
1543
1544 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1545 {
1546         if (param) {
1547                 kfree(param->path_name);
1548                 kfree(param->node_name);
1549                 kfree(param);
1550         }
1551 }
1552
1553 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1554                                        int number_of_items)
1555 {
1556         int i;
1557         if ((number_of_items == 0) || (param == NULL))
1558                 return;
1559         for (i = 0; i < number_of_items; i++) {
1560                 kfree(param[i].path_name);
1561                 kfree(param[i].node_name);
1562         }
1563         kfree(param);
1564 }
1565
1566 #define   MID_FREE 0
1567 #define   MID_REQUEST_ALLOCATED 1
1568 #define   MID_REQUEST_SUBMITTED 2
1569 #define   MID_RESPONSE_RECEIVED 4
1570 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
1571 #define   MID_RESPONSE_MALFORMED 0x10
1572 #define   MID_SHUTDOWN           0x20
1573
1574 /* Flags */
1575 #define   MID_WAIT_CANCELLED     1 /* Cancelled while waiting for response */
1576 #define   MID_DELETED            2 /* Mid has been dequeued/deleted */
1577
1578 /* Types of response buffer returned from SendReceive2 */
1579 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
1580 #define   CIFS_SMALL_BUFFER     1
1581 #define   CIFS_LARGE_BUFFER     2
1582 #define   CIFS_IOVEC            4    /* array of response buffers */
1583
1584 /* Type of Request to SendReceive2 */
1585 #define   CIFS_BLOCKING_OP      1    /* operation can block */
1586 #define   CIFS_ASYNC_OP         2    /* do not wait for response */
1587 #define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
1588 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
1589 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
1590 #define   CIFS_NO_RESP      0x040    /* no response buffer required */
1591
1592 /* Type of request operation */
1593 #define   CIFS_ECHO_OP      0x080    /* echo request */
1594 #define   CIFS_OBREAK_OP   0x0100    /* oplock break request */
1595 #define   CIFS_NEG_OP      0x0200    /* negotiate request */
1596 #define   CIFS_OP_MASK     0x0380    /* mask request type */
1597
1598 #define   CIFS_HAS_CREDITS 0x0400    /* already has credits */
1599 #define   CIFS_TRANSFORM_REQ 0x0800    /* transform request before sending */
1600
1601 /* Security Flags: indicate type of session setup needed */
1602 #define   CIFSSEC_MAY_SIGN      0x00001
1603 #define   CIFSSEC_MAY_NTLM      0x00002
1604 #define   CIFSSEC_MAY_NTLMV2    0x00004
1605 #define   CIFSSEC_MAY_KRB5      0x00008
1606 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1607 #define   CIFSSEC_MAY_LANMAN    0x00010
1608 #define   CIFSSEC_MAY_PLNTXT    0x00020
1609 #else
1610 #define   CIFSSEC_MAY_LANMAN    0
1611 #define   CIFSSEC_MAY_PLNTXT    0
1612 #endif /* weak passwords */
1613 #define   CIFSSEC_MAY_SEAL      0x00040 /* not supported yet */
1614 #define   CIFSSEC_MAY_NTLMSSP   0x00080 /* raw ntlmssp with ntlmv2 */
1615
1616 #define   CIFSSEC_MUST_SIGN     0x01001
1617 /* note that only one of the following can be set so the
1618 result of setting MUST flags more than once will be to
1619 require use of the stronger protocol */
1620 #define   CIFSSEC_MUST_NTLM     0x02002
1621 #define   CIFSSEC_MUST_NTLMV2   0x04004
1622 #define   CIFSSEC_MUST_KRB5     0x08008
1623 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1624 #define   CIFSSEC_MUST_LANMAN   0x10010
1625 #define   CIFSSEC_MUST_PLNTXT   0x20020
1626 #ifdef CONFIG_CIFS_UPCALL
1627 #define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
1628 #else
1629 #define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
1630 #endif /* UPCALL */
1631 #else /* do not allow weak pw hash */
1632 #define   CIFSSEC_MUST_LANMAN   0
1633 #define   CIFSSEC_MUST_PLNTXT   0
1634 #ifdef CONFIG_CIFS_UPCALL
1635 #define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
1636 #else
1637 #define   CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
1638 #endif /* UPCALL */
1639 #endif /* WEAK_PW_HASH */
1640 #define   CIFSSEC_MUST_SEAL     0x40040 /* not supported yet */
1641 #define   CIFSSEC_MUST_NTLMSSP  0x80080 /* raw ntlmssp with ntlmv2 */
1642
1643 #define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1644 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1645 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1646 /*
1647  *****************************************************************
1648  * All constants go here
1649  *****************************************************************
1650  */
1651
1652 #define UID_HASH (16)
1653
1654 /*
1655  * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1656  * following to be declared.
1657  */
1658
1659 /****************************************************************************
1660  *  Locking notes.  All updates to global variables and lists should be
1661  *                  protected by spinlocks or semaphores.
1662  *
1663  *  Spinlocks
1664  *  ---------
1665  *  GlobalMid_Lock protects:
1666  *      list operations on pending_mid_q and oplockQ
1667  *      updates to XID counters, multiplex id  and SMB sequence numbers
1668  *  tcp_ses_lock protects:
1669  *      list operations on tcp and SMB session lists
1670  *  tcon->open_file_lock protects the list of open files hanging off the tcon
1671  *  cfile->file_info_lock protects counters and fields in cifs file struct
1672  *  f_owner.lock protects certain per file struct operations
1673  *  mapping->page_lock protects certain per page operations
1674  *
1675  *  Semaphores
1676  *  ----------
1677  *  sesSem     operations on smb session
1678  *  tconSem    operations on tree connection
1679  *  fh_sem      file handle reconnection operations
1680  *
1681  ****************************************************************************/
1682
1683 #ifdef DECLARE_GLOBALS_HERE
1684 #define GLOBAL_EXTERN
1685 #else
1686 #define GLOBAL_EXTERN extern
1687 #endif
1688
1689 /*
1690  * the list of TCP_Server_Info structures, ie each of the sockets
1691  * connecting our client to a distinct server (ip address), is
1692  * chained together by cifs_tcp_ses_list. The list of all our SMB
1693  * sessions (and from that the tree connections) can be found
1694  * by iterating over cifs_tcp_ses_list
1695  */
1696 GLOBAL_EXTERN struct list_head          cifs_tcp_ses_list;
1697
1698 /*
1699  * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1700  * tcp session, and the list of tcon's per smb session. It also protects
1701  * the reference counters for the server, smb session, and tcon. Finally,
1702  * changes to the tcon->tidStatus should be done while holding this lock.
1703  * generally the locks should be taken in order tcp_ses_lock before
1704  * tcon->open_file_lock and that before file->file_info_lock since the
1705  * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1706  */
1707 GLOBAL_EXTERN spinlock_t                cifs_tcp_ses_lock;
1708
1709 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1710 /* Outstanding dir notify requests */
1711 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1712 /* DirNotify response queue */
1713 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1714 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1715
1716 /*
1717  * Global transaction id (XID) information
1718  */
1719 GLOBAL_EXTERN unsigned int GlobalCurrentXid;    /* protected by GlobalMid_Sem */
1720 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1721 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;  /* prot by GlobalMid_Sem */
1722 GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
1723                                           /* on midQ entries */
1724 /*
1725  *  Global counters, updated atomically
1726  */
1727 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1728 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1729 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1730 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1731 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1732
1733 /* Various Debug counters */
1734 GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
1735 #ifdef CONFIG_CIFS_STATS2
1736 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1737 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1738 #endif
1739 GLOBAL_EXTERN atomic_t smBufAllocCount;
1740 GLOBAL_EXTERN atomic_t midCount;
1741
1742 /* Misc globals */
1743 extern bool enable_oplocks; /* enable or disable oplocks */
1744 extern bool lookupCacheEnabled;
1745 extern unsigned int global_secflags;    /* if on, session setup sent
1746                                 with more secure ntlmssp2 challenge/resp */
1747 extern unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
1748 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1749 extern unsigned int CIFSMaxBufSize;  /* max size not including hdr */
1750 extern unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
1751 extern unsigned int cifs_min_small;  /* min size of small buf pool */
1752 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1753 extern bool disable_legacy_dialects;  /* forbid vers=1.0 and vers=2.0 mounts */
1754
1755 #ifdef CONFIG_CIFS_ACL
1756 GLOBAL_EXTERN struct rb_root uidtree;
1757 GLOBAL_EXTERN struct rb_root gidtree;
1758 GLOBAL_EXTERN spinlock_t siduidlock;
1759 GLOBAL_EXTERN spinlock_t sidgidlock;
1760 GLOBAL_EXTERN struct rb_root siduidtree;
1761 GLOBAL_EXTERN struct rb_root sidgidtree;
1762 GLOBAL_EXTERN spinlock_t uidsidlock;
1763 GLOBAL_EXTERN spinlock_t gidsidlock;
1764 #endif /* CONFIG_CIFS_ACL */
1765
1766 void cifs_oplock_break(struct work_struct *work);
1767 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1768
1769 extern const struct slow_work_ops cifs_oplock_break_ops;
1770 extern struct workqueue_struct *cifsiod_wq;
1771 extern struct workqueue_struct *cifsoplockd_wq;
1772 extern __u32 cifs_lock_secret;
1773
1774 extern mempool_t *cifs_mid_poolp;
1775
1776 /* Operations for different SMB versions */
1777 #define SMB1_VERSION_STRING     "1.0"
1778 extern struct smb_version_operations smb1_operations;
1779 extern struct smb_version_values smb1_values;
1780 #define SMB20_VERSION_STRING    "2.0"
1781 extern struct smb_version_operations smb20_operations;
1782 extern struct smb_version_values smb20_values;
1783 #define SMB21_VERSION_STRING    "2.1"
1784 extern struct smb_version_operations smb21_operations;
1785 extern struct smb_version_values smb21_values;
1786 #define SMBDEFAULT_VERSION_STRING "default"
1787 extern struct smb_version_values smbdefault_values;
1788 #define SMB3ANY_VERSION_STRING "3"
1789 extern struct smb_version_values smb3any_values;
1790 #define SMB30_VERSION_STRING    "3.0"
1791 extern struct smb_version_operations smb30_operations;
1792 extern struct smb_version_values smb30_values;
1793 #define SMB302_VERSION_STRING   "3.02"
1794 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1795 extern struct smb_version_values smb302_values;
1796 #define SMB311_VERSION_STRING   "3.1.1"
1797 #define ALT_SMB311_VERSION_STRING "3.11"
1798 extern struct smb_version_operations smb311_operations;
1799 extern struct smb_version_values smb311_values;
1800 #endif  /* _CIFS_GLOB_H */