fs/xfs/linux-2.6/xfs_vfs.h - arm/linux-arm64-legacy - Git at Google

 /*
  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
  * All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it would be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write the Free Software Foundation,
  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 #ifndef __XFS_VFS_H__
 #define __XFS_VFS_H__

 #include <linux/vfs.h>
 #include "xfs_fs.h"

 struct bhv_vfs;
 struct bhv_vnode;

 struct fid;
 struct cred;
 struct seq_file;
 struct super_block;
 struct xfs_inode;
 struct xfs_mount_args;

 typedef struct kstatfs	bhv_statvfs_t;

 typedef struct bhv_vfs_sync_work {
 	struct list_head	w_list;
 	struct bhv_vfs		*w_vfs;
 	void			*w_data;	/* syncer routine argument */
 	void			(*w_syncer)(struct bhv_vfs *, void *);
 } bhv_vfs_sync_work_t;

 typedef struct bhv_vfs {
 	u_int			vfs_flag;	/* flags */
 	xfs_fsid_t		vfs_fsid;	/* file system ID */
 	xfs_fsid_t		*vfs_altfsid;	/* An ID fixed for life of FS */
 	bhv_head_t		vfs_bh;		/* head of vfs behavior chain */
 	struct super_block	*vfs_super;	/* generic superblock pointer */
 	struct task_struct	*vfs_sync_task;	/* generalised sync thread */
 	bhv_vfs_sync_work_t	vfs_sync_work;	/* work item for VFS_SYNC */
 	struct list_head	vfs_sync_list;	/* sync thread work item list */
 	spinlock_t		vfs_sync_lock;	/* work item list lock */
 	int			vfs_sync_seq;	/* sync thread generation no. */
 	wait_queue_head_t	vfs_wait_single_sync_task;
 } bhv_vfs_t;

 #define bhvtovfs(bdp)		( (struct bhv_vfs *)BHV_VOBJ(bdp) )
 #define bhvtovfsops(bdp)	( (struct bhv_vfsops *)BHV_OPS(bdp) )
 #define VFS_BHVHEAD(vfs)	( &(vfs)->vfs_bh )
 #define VFS_REMOVEBHV(vfs, bdp)	( bhv_remove(VFS_BHVHEAD(vfs), bdp) )

 #define VFS_POSITION_BASE	BHV_POSITION_BASE	/* chain bottom */
 #define VFS_POSITION_TOP	BHV_POSITION_TOP	/* chain top */
 #define VFS_POSITION_INVALID	BHV_POSITION_INVALID	/* invalid pos. num */

 typedef enum {
 	VFS_BHV_UNKNOWN,	/* not specified */
 	VFS_BHV_XFS,		/* xfs */
 	VFS_BHV_DM,		/* data migration */
 	VFS_BHV_QM,		/* quota manager */
 	VFS_BHV_IO,		/* IO path */
 	VFS_BHV_END		/* housekeeping end-of-range */
 } bhv_vfs_type_t;

 #define VFS_POSITION_XFS	(BHV_POSITION_BASE)
 #define VFS_POSITION_DM		(VFS_POSITION_BASE+10)
 #define VFS_POSITION_QM		(VFS_POSITION_BASE+20)
 #define VFS_POSITION_IO		(VFS_POSITION_BASE+30)

 #define VFS_RDONLY		0x0001	/* read-only vfs */
 #define VFS_GRPID		0x0002	/* group-ID assigned from directory */
 #define VFS_DMI			0x0004	/* filesystem has the DMI enabled */
 /* ---- VFS_UMOUNT ----		0x0008	-- unneeded, fixed via kthread APIs */
 #define VFS_32BITINODES		0x0010	/* do not use inums above 32 bits */
 #define VFS_END			0x0010	/* max flag */

 #define SYNC_ATTR		0x0001	/* sync attributes */
 #define SYNC_CLOSE		0x0002	/* close file system down */
 #define SYNC_DELWRI		0x0004	/* look at delayed writes */
 #define SYNC_WAIT		0x0008	/* wait for i/o to complete */
 #define SYNC_BDFLUSH		0x0010	/* BDFLUSH is calling -- don't block */
 #define SYNC_FSDATA		0x0020	/* flush fs data (e.g. superblocks) */
 #define SYNC_REFCACHE		0x0040  /* prune some of the nfs ref cache */
 #define SYNC_REMOUNT		0x0080  /* remount readonly, no dummy LRs */
 #define SYNC_IOWAIT		0x0100  /* wait for all I/O to complete */
 #define SYNC_SUPER		0x0200  /* flush superblock to disk */

 /*
  * When remounting a filesystem read-only or freezing the filesystem,
  * we have two phases to execute. This first phase is syncing the data
  * before we quiesce the fielsystem, and the second is flushing all the
  * inodes out after we've waited for all the transactions created by
  * the first phase to complete. The second phase uses SYNC_INODE_QUIESCE
  * to ensure that the inodes are written to their location on disk
  * rather than just existing in transactions in the log. This means
  * after a quiesce there is no log replay required to write the inodes
  * to disk (this is the main difference between a sync and a quiesce).
  */
 #define SYNC_DATA_QUIESCE	(SYNC_DELWRI|SYNC_FSDATA|SYNC_WAIT|SYNC_IOWAIT)
 #define SYNC_INODE_QUIESCE	(SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)

 #define SHUTDOWN_META_IO_ERROR	0x0001	/* write attempt to metadata failed */
 #define SHUTDOWN_LOG_IO_ERROR	0x0002	/* write attempt to the log failed */
 #define SHUTDOWN_FORCE_UMOUNT	0x0004	/* shutdown from a forced unmount */
 #define SHUTDOWN_CORRUPT_INCORE	0x0008	/* corrupt in-memory data structures */
 #define SHUTDOWN_REMOTE_REQ	0x0010	/* shutdown came from remote cell */
 #define SHUTDOWN_DEVICE_REQ	0x0020	/* failed all paths to the device */

 typedef int	(*vfs_mount_t)(bhv_desc_t *,
 				struct xfs_mount_args *, struct cred *);
 typedef int	(*vfs_parseargs_t)(bhv_desc_t *, char *,
 				struct xfs_mount_args *, int);
 typedef	int	(*vfs_showargs_t)(bhv_desc_t *, struct seq_file *);
 typedef int	(*vfs_unmount_t)(bhv_desc_t *, int, struct cred *);
 typedef int	(*vfs_mntupdate_t)(bhv_desc_t *, int *,
 				struct xfs_mount_args *);
 typedef int	(*vfs_root_t)(bhv_desc_t *, struct bhv_vnode **);
 typedef int	(*vfs_statvfs_t)(bhv_desc_t *, bhv_statvfs_t *,
 				struct bhv_vnode *);
 typedef int	(*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
 typedef int	(*vfs_vget_t)(bhv_desc_t *, struct bhv_vnode **, struct fid *);
 typedef int	(*vfs_dmapiops_t)(bhv_desc_t *, caddr_t);
 typedef int	(*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
 typedef void	(*vfs_init_vnode_t)(bhv_desc_t *,
 				struct bhv_vnode *, struct xfs_inode *, int);
 typedef void	(*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
 typedef void	(*vfs_freeze_t)(bhv_desc_t *);

 typedef struct bhv_vfsops {
 	bhv_position_t		vf_position;	/* behavior chain position */
 	vfs_mount_t		vfs_mount;	/* mount file system */
 	vfs_parseargs_t		vfs_parseargs;	/* parse mount options */
 	vfs_showargs_t		vfs_showargs;	/* unparse mount options */
 	vfs_unmount_t		vfs_unmount;	/* unmount file system */
 	vfs_mntupdate_t		vfs_mntupdate;	/* update file system options */
 	vfs_root_t		vfs_root;	/* get root vnode */
 	vfs_statvfs_t		vfs_statvfs;	/* file system statistics */
 	vfs_sync_t		vfs_sync;	/* flush files */
 	vfs_vget_t		vfs_vget;	/* get vnode from fid */
 	vfs_dmapiops_t		vfs_dmapiops;	/* data migration */
 	vfs_quotactl_t		vfs_quotactl;	/* disk quota */
 	vfs_init_vnode_t	vfs_init_vnode;	/* initialize a new vnode */
 	vfs_force_shutdown_t	vfs_force_shutdown;	/* crash and burn */
 	vfs_freeze_t		vfs_freeze;	/* freeze fs for snapshot */
 } bhv_vfsops_t;

 /*
  * Virtual filesystem operations, operating from head bhv.
  */
 #define VFSHEAD(v)			((v)->vfs_bh.bh_first)
 #define bhv_vfs_mount(v, ma,cr)		vfs_mount(VFSHEAD(v), ma,cr)
 #define bhv_vfs_parseargs(v, o,ma,f)	vfs_parseargs(VFSHEAD(v), o,ma,f)
 #define bhv_vfs_showargs(v, m)		vfs_showargs(VFSHEAD(v), m)
 #define bhv_vfs_unmount(v, f,cr)	vfs_unmount(VFSHEAD(v), f,cr)
 #define bhv_vfs_mntupdate(v, fl,args)	vfs_mntupdate(VFSHEAD(v), fl,args)
 #define bhv_vfs_root(v, vpp)		vfs_root(VFSHEAD(v), vpp)
 #define bhv_vfs_statvfs(v, sp,vp)	vfs_statvfs(VFSHEAD(v), sp,vp)
 #define bhv_vfs_sync(v, flag,cr)	vfs_sync(VFSHEAD(v), flag,cr)
 #define bhv_vfs_vget(v, vpp,fidp)	vfs_vget(VFSHEAD(v), vpp,fidp)
 #define bhv_vfs_dmapiops(v, p)		vfs_dmapiops(VFSHEAD(v), p)
 #define bhv_vfs_quotactl(v, c,id,p)	vfs_quotactl(VFSHEAD(v), c,id,p)
 #define bhv_vfs_init_vnode(v, vp,b,ul)	vfs_init_vnode(VFSHEAD(v), vp,b,ul)
 #define bhv_vfs_force_shutdown(v,u,f,l)	vfs_force_shutdown(VFSHEAD(v), u,f,l)
 #define bhv_vfs_freeze(v)		vfs_freeze(VFSHEAD(v))

 /*
  * Virtual filesystem operations, operating from next bhv.
  */
 #define bhv_next_vfs_mount(b, ma,cr)		vfs_mount(b, ma,cr)
 #define bhv_next_vfs_parseargs(b, o,ma,f)	vfs_parseargs(b, o,ma,f)
 #define bhv_next_vfs_showargs(b, m)		vfs_showargs(b, m)
 #define bhv_next_vfs_unmount(b, f,cr)		vfs_unmount(b, f,cr)
 #define bhv_next_vfs_mntupdate(b, fl,args)	vfs_mntupdate(b, fl, args)
 #define bhv_next_vfs_root(b, vpp)		vfs_root(b, vpp)
 #define bhv_next_vfs_statvfs(b, sp,vp)		vfs_statvfs(b, sp,vp)
 #define bhv_next_vfs_sync(b, flag,cr)		vfs_sync(b, flag,cr)
 #define bhv_next_vfs_vget(b, vpp,fidp)		vfs_vget(b, vpp,fidp)
 #define bhv_next_vfs_dmapiops(b, p)		vfs_dmapiops(b, p)
 #define bhv_next_vfs_quotactl(b, c,id,p)	vfs_quotactl(b, c,id,p)
 #define bhv_next_vfs_init_vnode(b, vp,b2,ul)	vfs_init_vnode(b, vp,b2,ul)
 #define bhv_next_force_shutdown(b, fl,f,l)	vfs_force_shutdown(b, fl,f,l)
 #define bhv_next_vfs_freeze(b)			vfs_freeze(b)

 extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *);
 extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int);
 extern int vfs_showargs(bhv_desc_t *, struct seq_file *);
 extern int vfs_unmount(bhv_desc_t *, int, struct cred *);
 extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *);
 extern int vfs_root(bhv_desc_t *, struct bhv_vnode **);
 extern int vfs_statvfs(bhv_desc_t *, bhv_statvfs_t *, struct bhv_vnode *);
 extern int vfs_sync(bhv_desc_t *, int, struct cred *);
 extern int vfs_vget(bhv_desc_t *, struct bhv_vnode **, struct fid *);
 extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
 extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
 extern void vfs_init_vnode(bhv_desc_t *, struct bhv_vnode *, struct xfs_inode *, int);
 extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
 extern void vfs_freeze(bhv_desc_t *);

 #define vfs_test_for_freeze(vfs)	((vfs)->vfs_super->s_frozen)
 #define vfs_wait_for_freeze(vfs,l)	vfs_check_frozen((vfs)->vfs_super, (l))

 typedef struct bhv_module_vfsops {
 	struct bhv_vfsops	bhv_common;
 	void *			bhv_custom;
 } bhv_module_vfsops_t;

 #define vfs_bhv_lookup(v, id)	(bhv_lookup_range(&(v)->vfs_bh, (id), (id)))
 #define vfs_bhv_custom(b)	(((bhv_module_vfsops_t*)BHV_OPS(b))->bhv_custom)
 #define vfs_bhv_set_custom(b,o)	((b)->bhv_custom = (void *)(o))
 #define vfs_bhv_clr_custom(b)	((b)->bhv_custom = NULL)

 extern bhv_vfs_t *vfs_allocate(struct super_block *);
 extern bhv_vfs_t *vfs_from_sb(struct super_block *);
 extern void vfs_deallocate(bhv_vfs_t *);
 extern void vfs_insertbhv(bhv_vfs_t *, bhv_desc_t *, bhv_vfsops_t *, void *);

 extern void vfs_insertops(bhv_vfs_t *, bhv_module_vfsops_t *);

 extern void bhv_insert_all_vfsops(struct bhv_vfs *);
 extern void bhv_remove_all_vfsops(struct bhv_vfs *, int);
 extern void bhv_remove_vfsops(struct bhv_vfs *, int);

 #endif	/* __XFS_VFS_H__ */
	/*
	* Copyright (c) 2000-2006 Silicon Graphics, Inc.
	* All Rights Reserved.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it would be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/
	#ifndef __XFS_VFS_H__
	#define __XFS_VFS_H__

	#include <linux/vfs.h>
	#include "xfs_fs.h"

	struct bhv_vfs;
	struct bhv_vnode;

	struct fid;
	struct cred;
	struct seq_file;
	struct super_block;
	struct xfs_inode;
	struct xfs_mount_args;

	typedef struct kstatfs bhv_statvfs_t;

	typedef struct bhv_vfs_sync_work {
	struct list_head w_list;
	struct bhv_vfs *w_vfs;
	void w_data; / syncer routine argument */
	void (w_syncer)(struct bhv_vfs , void *);
	} bhv_vfs_sync_work_t;

	typedef struct bhv_vfs {
	u_int vfs_flag; /* flags */
	xfs_fsid_t vfs_fsid; /* file system ID */
	xfs_fsid_t vfs_altfsid; / An ID fixed for life of FS */
	bhv_head_t vfs_bh; /* head of vfs behavior chain */
	struct super_block vfs_super; / generic superblock pointer */
	struct task_struct vfs_sync_task; / generalised sync thread */
	bhv_vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */
	struct list_head vfs_sync_list; /* sync thread work item list */
	spinlock_t vfs_sync_lock; /* work item list lock */
	int vfs_sync_seq; /* sync thread generation no. */
	wait_queue_head_t vfs_wait_single_sync_task;
	} bhv_vfs_t;

	#define bhvtovfs(bdp) ( (struct bhv_vfs *)BHV_VOBJ(bdp) )
	#define bhvtovfsops(bdp) ( (struct bhv_vfsops *)BHV_OPS(bdp) )
	#define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
	#define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )

	#define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
	#define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */
	#define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */

	typedef enum {
	VFS_BHV_UNKNOWN, /* not specified */
	VFS_BHV_XFS, /* xfs */
	VFS_BHV_DM, /* data migration */
	VFS_BHV_QM, /* quota manager */
	VFS_BHV_IO, /* IO path */
	VFS_BHV_END /* housekeeping end-of-range */
	} bhv_vfs_type_t;

	#define VFS_POSITION_XFS (BHV_POSITION_BASE)
	#define VFS_POSITION_DM (VFS_POSITION_BASE+10)
	#define VFS_POSITION_QM (VFS_POSITION_BASE+20)
	#define VFS_POSITION_IO (VFS_POSITION_BASE+30)

	#define VFS_RDONLY 0x0001 /* read-only vfs */
	#define VFS_GRPID 0x0002 /* group-ID assigned from directory */
	#define VFS_DMI 0x0004 /* filesystem has the DMI enabled */
	/* ---- VFS_UMOUNT ---- 0x0008 -- unneeded, fixed via kthread APIs */
	#define VFS_32BITINODES 0x0010 /* do not use inums above 32 bits */
	#define VFS_END 0x0010 /* max flag */

	#define SYNC_ATTR 0x0001 /* sync attributes */
	#define SYNC_CLOSE 0x0002 /* close file system down */
	#define SYNC_DELWRI 0x0004 /* look at delayed writes */
	#define SYNC_WAIT 0x0008 /* wait for i/o to complete */
	#define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */
	#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
	#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
	#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
	#define SYNC_IOWAIT 0x0100 /* wait for all I/O to complete */
	#define SYNC_SUPER 0x0200 /* flush superblock to disk */

	/*
	* When remounting a filesystem read-only or freezing the filesystem,
	* we have two phases to execute. This first phase is syncing the data
	* before we quiesce the fielsystem, and the second is flushing all the
	* inodes out after we've waited for all the transactions created by
	* the first phase to complete. The second phase uses SYNC_INODE_QUIESCE
	* to ensure that the inodes are written to their location on disk
	* rather than just existing in transactions in the log. This means
	* after a quiesce there is no log replay required to write the inodes
	* to disk (this is the main difference between a sync and a quiesce).
	*/
	#define SYNC_DATA_QUIESCE (SYNC_DELWRI\|SYNC_FSDATA\|SYNC_WAIT\|SYNC_IOWAIT)
	#define SYNC_INODE_QUIESCE (SYNC_REMOUNT\|SYNC_ATTR\|SYNC_WAIT)

	#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
	#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
	#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
	#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
	#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
	#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */

	typedef int (vfs_mount_t)(bhv_desc_t ,
	struct xfs_mount_args , struct cred );
	typedef int (vfs_parseargs_t)(bhv_desc_t , char *,
	struct xfs_mount_args *, int);
	typedef int (vfs_showargs_t)(bhv_desc_t , struct seq_file *);
	typedef int (vfs_unmount_t)(bhv_desc_t , int, struct cred *);
	typedef int (vfs_mntupdate_t)(bhv_desc_t , int *,
	struct xfs_mount_args *);
	typedef int (vfs_root_t)(bhv_desc_t , struct bhv_vnode **);
	typedef int (vfs_statvfs_t)(bhv_desc_t , bhv_statvfs_t *,
	struct bhv_vnode *);
	typedef int (vfs_sync_t)(bhv_desc_t , int, struct cred *);
	typedef int (vfs_vget_t)(bhv_desc_t , struct bhv_vnode *, struct fid );
	typedef int (vfs_dmapiops_t)(bhv_desc_t , caddr_t);
	typedef int (vfs_quotactl_t)(bhv_desc_t , int, int, caddr_t);
	typedef void (vfs_init_vnode_t)(bhv_desc_t ,
	struct bhv_vnode , struct xfs_inode , int);
	typedef void (vfs_force_shutdown_t)(bhv_desc_t , int, char *, int);
	typedef void (vfs_freeze_t)(bhv_desc_t );

	typedef struct bhv_vfsops {
	bhv_position_t vf_position; /* behavior chain position */
	vfs_mount_t vfs_mount; /* mount file system */
	vfs_parseargs_t vfs_parseargs; /* parse mount options */
	vfs_showargs_t vfs_showargs; /* unparse mount options */
	vfs_unmount_t vfs_unmount; /* unmount file system */
	vfs_mntupdate_t vfs_mntupdate; /* update file system options */
	vfs_root_t vfs_root; /* get root vnode */
	vfs_statvfs_t vfs_statvfs; /* file system statistics */
	vfs_sync_t vfs_sync; /* flush files */
	vfs_vget_t vfs_vget; /* get vnode from fid */
	vfs_dmapiops_t vfs_dmapiops; /* data migration */
	vfs_quotactl_t vfs_quotactl; /* disk quota */
	vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
	vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
	vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
	} bhv_vfsops_t;

	/*
	* Virtual filesystem operations, operating from head bhv.
	*/
	#define VFSHEAD(v) ((v)->vfs_bh.bh_first)
	#define bhv_vfs_mount(v, ma,cr) vfs_mount(VFSHEAD(v), ma,cr)
	#define bhv_vfs_parseargs(v, o,ma,f) vfs_parseargs(VFSHEAD(v), o,ma,f)
	#define bhv_vfs_showargs(v, m) vfs_showargs(VFSHEAD(v), m)
	#define bhv_vfs_unmount(v, f,cr) vfs_unmount(VFSHEAD(v), f,cr)
	#define bhv_vfs_mntupdate(v, fl,args) vfs_mntupdate(VFSHEAD(v), fl,args)
	#define bhv_vfs_root(v, vpp) vfs_root(VFSHEAD(v), vpp)
	#define bhv_vfs_statvfs(v, sp,vp) vfs_statvfs(VFSHEAD(v), sp,vp)
	#define bhv_vfs_sync(v, flag,cr) vfs_sync(VFSHEAD(v), flag,cr)
	#define bhv_vfs_vget(v, vpp,fidp) vfs_vget(VFSHEAD(v), vpp,fidp)
	#define bhv_vfs_dmapiops(v, p) vfs_dmapiops(VFSHEAD(v), p)
	#define bhv_vfs_quotactl(v, c,id,p) vfs_quotactl(VFSHEAD(v), c,id,p)
	#define bhv_vfs_init_vnode(v, vp,b,ul) vfs_init_vnode(VFSHEAD(v), vp,b,ul)
	#define bhv_vfs_force_shutdown(v,u,f,l) vfs_force_shutdown(VFSHEAD(v), u,f,l)
	#define bhv_vfs_freeze(v) vfs_freeze(VFSHEAD(v))

	/*
	* Virtual filesystem operations, operating from next bhv.
	*/
	#define bhv_next_vfs_mount(b, ma,cr) vfs_mount(b, ma,cr)
	#define bhv_next_vfs_parseargs(b, o,ma,f) vfs_parseargs(b, o,ma,f)
	#define bhv_next_vfs_showargs(b, m) vfs_showargs(b, m)
	#define bhv_next_vfs_unmount(b, f,cr) vfs_unmount(b, f,cr)
	#define bhv_next_vfs_mntupdate(b, fl,args) vfs_mntupdate(b, fl, args)
	#define bhv_next_vfs_root(b, vpp) vfs_root(b, vpp)
	#define bhv_next_vfs_statvfs(b, sp,vp) vfs_statvfs(b, sp,vp)
	#define bhv_next_vfs_sync(b, flag,cr) vfs_sync(b, flag,cr)
	#define bhv_next_vfs_vget(b, vpp,fidp) vfs_vget(b, vpp,fidp)
	#define bhv_next_vfs_dmapiops(b, p) vfs_dmapiops(b, p)
	#define bhv_next_vfs_quotactl(b, c,id,p) vfs_quotactl(b, c,id,p)
	#define bhv_next_vfs_init_vnode(b, vp,b2,ul) vfs_init_vnode(b, vp,b2,ul)
	#define bhv_next_force_shutdown(b, fl,f,l) vfs_force_shutdown(b, fl,f,l)
	#define bhv_next_vfs_freeze(b) vfs_freeze(b)

	extern int vfs_mount(bhv_desc_t , struct xfs_mount_args , struct cred *);
	extern int vfs_parseargs(bhv_desc_t , char , struct xfs_mount_args *, int);
	extern int vfs_showargs(bhv_desc_t , struct seq_file );
	extern int vfs_unmount(bhv_desc_t , int, struct cred );
	extern int vfs_mntupdate(bhv_desc_t , int , struct xfs_mount_args *);
	extern int vfs_root(bhv_desc_t , struct bhv_vnode *);
	extern int vfs_statvfs(bhv_desc_t , bhv_statvfs_t , struct bhv_vnode *);
	extern int vfs_sync(bhv_desc_t , int, struct cred );
	extern int vfs_vget(bhv_desc_t , struct bhv_vnode , struct fid );
	extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
	extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
	extern void vfs_init_vnode(bhv_desc_t , struct bhv_vnode , struct xfs_inode *, int);
	extern void vfs_force_shutdown(bhv_desc_t , int, char , int);
	extern void vfs_freeze(bhv_desc_t *);

	#define vfs_test_for_freeze(vfs) ((vfs)->vfs_super->s_frozen)
	#define vfs_wait_for_freeze(vfs,l) vfs_check_frozen((vfs)->vfs_super, (l))

	typedef struct bhv_module_vfsops {
	struct bhv_vfsops bhv_common;
	void * bhv_custom;
	} bhv_module_vfsops_t;

	#define vfs_bhv_lookup(v, id) (bhv_lookup_range(&(v)->vfs_bh, (id), (id)))
	#define vfs_bhv_custom(b) (((bhv_module_vfsops_t*)BHV_OPS(b))->bhv_custom)
	#define vfs_bhv_set_custom(b,o) ((b)->bhv_custom = (void *)(o))
	#define vfs_bhv_clr_custom(b) ((b)->bhv_custom = NULL)

	extern bhv_vfs_t vfs_allocate(struct super_block );
	extern bhv_vfs_t vfs_from_sb(struct super_block );
	extern void vfs_deallocate(bhv_vfs_t *);
	extern void vfs_insertbhv(bhv_vfs_t , bhv_desc_t , bhv_vfsops_t , void );

	extern void vfs_insertops(bhv_vfs_t , bhv_module_vfsops_t );

	extern void bhv_insert_all_vfsops(struct bhv_vfs *);
	extern void bhv_remove_all_vfsops(struct bhv_vfs *, int);
	extern void bhv_remove_vfsops(struct bhv_vfs *, int);

	#endif /* __XFS_VFS_H__ */