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41e033fecd
If a share is known to be only to be accessed by one client, we can aggressively cache writes not just reads to it. Add "cache=" option (cache=singleclient) for mounting read write shares (that will not be read or written to from other clients while we have it mounted) in order to improve performance. Signed-off-by: Steve French <stfrench@microsoft.com>
96 lines
4.2 KiB
C
96 lines
4.2 KiB
C
/*
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* fs/cifs/cifs_fs_sb.h
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*
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* Copyright (c) International Business Machines Corp., 2002,2004
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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*/
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#include <linux/rbtree.h>
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#ifndef _CIFS_FS_SB_H
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#define _CIFS_FS_SB_H
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#include <linux/backing-dev.h>
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#define CIFS_MOUNT_NO_PERM 1 /* do not do client vfs_perm check */
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#define CIFS_MOUNT_SET_UID 2 /* set current's euid in create etc. */
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#define CIFS_MOUNT_SERVER_INUM 4 /* inode numbers from uniqueid from server */
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#define CIFS_MOUNT_DIRECT_IO 8 /* do not write nor read through page cache */
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#define CIFS_MOUNT_NO_XATTR 0x10 /* if set - disable xattr support */
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#define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames */
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#define CIFS_MOUNT_POSIX_PATHS 0x40 /* Negotiate posix pathnames if possible*/
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#define CIFS_MOUNT_UNX_EMUL 0x80 /* Network compat with SFUnix emulation */
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#define CIFS_MOUNT_NO_BRL 0x100 /* No sending byte range locks to srv */
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#define CIFS_MOUNT_CIFS_ACL 0x200 /* send ACL requests to non-POSIX srv */
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#define CIFS_MOUNT_OVERR_UID 0x400 /* override uid returned from server */
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#define CIFS_MOUNT_OVERR_GID 0x800 /* override gid returned from server */
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#define CIFS_MOUNT_DYNPERM 0x1000 /* allow in-memory only mode setting */
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#define CIFS_MOUNT_NOPOSIXBRL 0x2000 /* mandatory not posix byte range lock */
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#define CIFS_MOUNT_NOSSYNC 0x4000 /* don't do slow SMBflush on every sync*/
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#define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */
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#define CIFS_MOUNT_MF_SYMLINKS 0x10000 /* Minshall+French Symlinks enabled */
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#define CIFS_MOUNT_MULTIUSER 0x20000 /* multiuser mount */
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#define CIFS_MOUNT_STRICT_IO 0x40000 /* strict cache mode */
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#define CIFS_MOUNT_RWPIDFORWARD 0x80000 /* use pid forwarding for rw */
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#define CIFS_MOUNT_POSIXACL 0x100000 /* mirror of SB_POSIXACL in mnt_cifs_flags */
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#define CIFS_MOUNT_CIFS_BACKUPUID 0x200000 /* backup intent bit for a user */
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#define CIFS_MOUNT_CIFS_BACKUPGID 0x400000 /* backup intent bit for a group */
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#define CIFS_MOUNT_MAP_SFM_CHR 0x800000 /* SFM/MAC mapping for illegal chars */
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#define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
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* root mountable
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*/
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#define CIFS_MOUNT_UID_FROM_ACL 0x2000000 /* try to get UID via special SID */
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#define CIFS_MOUNT_NO_HANDLE_CACHE 0x4000000 /* disable caching dir handles */
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#define CIFS_MOUNT_NO_DFS 0x8000000 /* disable DFS resolving */
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#define CIFS_MOUNT_MODE_FROM_SID 0x10000000 /* retrieve mode from special ACE */
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#define CIFS_MOUNT_RO_CACHE 0x20000000 /* assumes share will not change */
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#define CIFS_MOUNT_RW_CACHE 0x40000000 /* assumes only client accessing */
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struct cifs_sb_info {
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struct rb_root tlink_tree;
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spinlock_t tlink_tree_lock;
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struct tcon_link *master_tlink;
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struct nls_table *local_nls;
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unsigned int bsize;
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unsigned int rsize;
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unsigned int wsize;
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unsigned long actimeo; /* attribute cache timeout (jiffies) */
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atomic_t active;
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kuid_t mnt_uid;
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kgid_t mnt_gid;
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kuid_t mnt_backupuid;
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kgid_t mnt_backupgid;
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umode_t mnt_file_mode;
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umode_t mnt_dir_mode;
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unsigned int mnt_cifs_flags;
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char *mountdata; /* options received at mount time or via DFS refs */
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struct delayed_work prune_tlinks;
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struct rcu_head rcu;
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/* only used when CIFS_MOUNT_USE_PREFIX_PATH is set */
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char *prepath;
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/*
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* Path initially provided by the mount call. We might connect
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* to something different via DFS but we want to keep it to do
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* failover properly.
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*/
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char *origin_fullpath; /* \\HOST\SHARE\[OPTIONAL PATH] */
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/*
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* Indicate whether serverino option was turned off later
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* (cifs_autodisable_serverino) in order to match new mounts.
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*/
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bool mnt_cifs_serverino_autodisabled;
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};
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#endif /* _CIFS_FS_SB_H */
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