fs/cifs/cifs_fs_sb.h

   1 /*
   2  *   fs/cifs/cifs_fs_sb.h
   3  *
   4  *   Copyright (c) International Business Machines  Corp., 2002,2004
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  */
  18 #include <linux/rbtree.h>
  19
  20 #ifndef _CIFS_FS_SB_H
  21 #define _CIFS_FS_SB_H
  22
  23 #include <linux/backing-dev.h>
  24
  25 #define CIFS_MOUNT_NO_PERM      1 /* do not do client vfs_perm check */
  26 #define CIFS_MOUNT_SET_UID      2 /* set current's euid in create etc. */
  27 #define CIFS_MOUNT_SERVER_INUM  4 /* inode numbers from uniqueid from server  */
  28 #define CIFS_MOUNT_DIRECT_IO    8 /* do not write nor read through page cache */
  29 #define CIFS_MOUNT_NO_XATTR     0x10  /* if set - disable xattr support       */
  30 #define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames   */
  31 #define CIFS_MOUNT_POSIX_PATHS  0x40  /* Negotiate posix pathnames if possible*/
  32 #define CIFS_MOUNT_UNX_EMUL     0x80  /* Network compat with SFUnix emulation */
  33 #define CIFS_MOUNT_NO_BRL       0x100 /* No sending byte range locks to srv   */
  34 #define CIFS_MOUNT_CIFS_ACL     0x200 /* send ACL requests to non-POSIX srv   */
  35 #define CIFS_MOUNT_OVERR_UID    0x400 /* override uid returned from server    */
  36 #define CIFS_MOUNT_OVERR_GID    0x800 /* override gid returned from server    */
  37 #define CIFS_MOUNT_DYNPERM      0x1000 /* allow in-memory only mode setting   */
  38 #define CIFS_MOUNT_NOPOSIXBRL   0x2000 /* mandatory not posix byte range lock */
  39 #define CIFS_MOUNT_NOSSYNC      0x4000 /* don't do slow SMBflush on every sync*/
  40 #define CIFS_MOUNT_FSCACHE      0x8000 /* local caching enabled */
  41 #define CIFS_MOUNT_MF_SYMLINKS  0x10000 /* Minshall+French Symlinks enabled */
  42 #define CIFS_MOUNT_MULTIUSER    0x20000 /* multiuser mount */
  43 #define CIFS_MOUNT_STRICT_IO    0x40000 /* strict cache mode */
  44 #define CIFS_MOUNT_RWPIDFORWARD 0x80000 /* use pid forwarding for rw */
  45 #define CIFS_MOUNT_POSIXACL     0x100000 /* mirror of SB_POSIXACL in mnt_cifs_flags */
  46 #define CIFS_MOUNT_CIFS_BACKUPUID 0x200000 /* backup intent bit for a user */
  47 #define CIFS_MOUNT_CIFS_BACKUPGID 0x400000 /* backup intent bit for a group */
  48 #define CIFS_MOUNT_MAP_SFM_CHR  0x800000 /* SFM/MAC mapping for illegal chars */
  49 #define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
  50                                               * root mountable
  51                                               */
  52 #define CIFS_MOUNT_UID_FROM_ACL 0x2000000 /* try to get UID via special SID */
  53 #define CIFS_MOUNT_NO_HANDLE_CACHE 0x4000000 /* disable caching dir handles */
  54 #define CIFS_MOUNT_NO_DFS 0x8000000 /* disable DFS resolving */
  55 #define CIFS_MOUNT_MODE_FROM_SID 0x10000000 /* retrieve mode from special ACE */
  56 #define CIFS_MOUNT_RO_CACHE     0x20000000  /* assumes share will not change */
  57 #define CIFS_MOUNT_RW_CACHE     0x40000000  /* assumes only client accessing */
  58
  59 struct cifs_sb_info {
  60         struct rb_root tlink_tree;
  61         spinlock_t tlink_tree_lock;
  62         struct tcon_link *master_tlink;
  63         struct nls_table *local_nls;
  64         struct smb3_fs_context *ctx;
  65         atomic_t active;
  66         unsigned int mnt_cifs_flags;
  67         struct delayed_work prune_tlinks;
  68         struct rcu_head rcu;
  69
  70         /* only used when CIFS_MOUNT_USE_PREFIX_PATH is set */
  71         char *prepath;
  72
  73         /*
  74          * Path initially provided by the mount call. We might connect
  75          * to something different via DFS but we want to keep it to do
  76          * failover properly.
  77          */
  78         char *origin_fullpath; /* \\HOST\SHARE\[OPTIONAL PATH] */
  79         /*
  80          * Indicate whether serverino option was turned off later
  81          * (cifs_autodisable_serverino) in order to match new mounts.
  82          */
  83         bool mnt_cifs_serverino_autodisabled;
  84 };
  85 #endif                          /* _CIFS_FS_SB_H */