fs/cifs/cifs_fs_sb.h

0001 /* SPDX-License-Identifier: LGPL-2.1 */
0002 /*
0003  *
0004  *   Copyright (c) International Business Machines  Corp., 2002,2004
0005  *   Author(s): Steve French (sfrench@us.ibm.com)
0006  *
0007  */
0008 #include <linux/rbtree.h>
0009
0010 #ifndef _CIFS_FS_SB_H
0011 #define _CIFS_FS_SB_H
0012
0013 #include <linux/backing-dev.h>
0014
0015 #define CIFS_MOUNT_NO_PERM      1 /* do not do client vfs_perm check */
0016 #define CIFS_MOUNT_SET_UID      2 /* set current's euid in create etc. */
0017 #define CIFS_MOUNT_SERVER_INUM  4 /* inode numbers from uniqueid from server  */
0018 #define CIFS_MOUNT_DIRECT_IO    8 /* do not write nor read through page cache */
0019 #define CIFS_MOUNT_NO_XATTR     0x10  /* if set - disable xattr support       */
0020 #define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames   */
0021 #define CIFS_MOUNT_POSIX_PATHS  0x40  /* Negotiate posix pathnames if possible*/
0022 #define CIFS_MOUNT_UNX_EMUL     0x80  /* Network compat with SFUnix emulation */
0023 #define CIFS_MOUNT_NO_BRL       0x100 /* No sending byte range locks to srv   */
0024 #define CIFS_MOUNT_CIFS_ACL     0x200 /* send ACL requests to non-POSIX srv   */
0025 #define CIFS_MOUNT_OVERR_UID    0x400 /* override uid returned from server    */
0026 #define CIFS_MOUNT_OVERR_GID    0x800 /* override gid returned from server    */
0027 #define CIFS_MOUNT_DYNPERM      0x1000 /* allow in-memory only mode setting   */
0028 #define CIFS_MOUNT_NOPOSIXBRL   0x2000 /* mandatory not posix byte range lock */
0029 #define CIFS_MOUNT_NOSSYNC      0x4000 /* don't do slow SMBflush on every sync*/
0030 #define CIFS_MOUNT_FSCACHE  0x8000 /* local caching enabled */
0031 #define CIFS_MOUNT_MF_SYMLINKS  0x10000 /* Minshall+French Symlinks enabled */
0032 #define CIFS_MOUNT_MULTIUSER    0x20000 /* multiuser mount */
0033 #define CIFS_MOUNT_STRICT_IO    0x40000 /* strict cache mode */
0034 #define CIFS_MOUNT_RWPIDFORWARD 0x80000 /* use pid forwarding for rw */
0035 #define CIFS_MOUNT_POSIXACL 0x100000 /* mirror of SB_POSIXACL in mnt_cifs_flags */
0036 #define CIFS_MOUNT_CIFS_BACKUPUID 0x200000 /* backup intent bit for a user */
0037 #define CIFS_MOUNT_CIFS_BACKUPGID 0x400000 /* backup intent bit for a group */
0038 #define CIFS_MOUNT_MAP_SFM_CHR  0x800000 /* SFM/MAC mapping for illegal chars */
0039 #define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
0040                           * root mountable
0041                           */
0042 #define CIFS_MOUNT_UID_FROM_ACL 0x2000000 /* try to get UID via special SID */
0043 #define CIFS_MOUNT_NO_HANDLE_CACHE 0x4000000 /* disable caching dir handles */
0044 #define CIFS_MOUNT_NO_DFS 0x8000000 /* disable DFS resolving */
0045 #define CIFS_MOUNT_MODE_FROM_SID 0x10000000 /* retrieve mode from special ACE */
0046 #define CIFS_MOUNT_RO_CACHE 0x20000000  /* assumes share will not change */
0047 #define CIFS_MOUNT_RW_CACHE 0x40000000  /* assumes only client accessing */
0048 #define CIFS_MOUNT_SHUTDOWN 0x80000000
0049
0050 struct cifs_sb_info {
0051     struct rb_root tlink_tree;
0052     spinlock_t tlink_tree_lock;
0053     struct tcon_link *master_tlink;
0054     struct nls_table *local_nls;
0055     struct smb3_fs_context *ctx;
0056     atomic_t active;
0057     unsigned int mnt_cifs_flags;
0058     struct delayed_work prune_tlinks;
0059     struct rcu_head rcu;
0060
0061     /* only used when CIFS_MOUNT_USE_PREFIX_PATH is set */
0062     char *prepath;
0063
0064     /* randomly generated 128-bit number for indexing dfs mount groups in referral cache */
0065     uuid_t dfs_mount_id;
0066     /*
0067      * Indicate whether serverino option was turned off later
0068      * (cifs_autodisable_serverino) in order to match new mounts.
0069      */
0070     bool mnt_cifs_serverino_autodisabled;
0071     /*
0072      * Available once the mount has completed.
0073      */
0074     struct dentry *root;
0075 };
0076 #endif              /* _CIFS_FS_SB_H */