[mirror_ubuntu-jammy-kernel.git] / fs / xfs / linux-2.6 / xfs_vfs.h

/*
 * Copyright (c) 2000-2005 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 fid;
struct vfs;
struct cred;
struct vnode;
struct kstatfs;
struct seq_file;
struct super_block;
struct xfs_mount_args;

typedef struct kstatfs xfs_statfs_t;

typedef struct vfs_sync_work {
	struct list_head	w_list;
	struct vfs		*w_vfs;
	void			*w_data;	/* syncer routine argument */
	void			(*w_syncer)(struct vfs *, void *);
} vfs_sync_work_t;

typedef struct 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 */
	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;
} vfs_t;

#define vfs_fbhv		vfs_bh.bh_first	/* 1st on vfs behavior chain */

#define bhvtovfs(bdp)		( (struct vfs *)BHV_VOBJ(bdp) )
#define bhvtovfsops(bdp)	( (struct 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 */
} vfs_bhv_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 */
#define VFS_END			0x0008	/* 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_QUIESCE		0x0100  /* quiesce fileystem for a snapshot */

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 vnode **);
typedef int	(*vfs_statvfs_t)(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
typedef int	(*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
typedef int	(*vfs_vget_t)(bhv_desc_t *, struct 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 vnode *, bhv_desc_t *, int);
typedef void	(*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
typedef void	(*vfs_freeze_t)(bhv_desc_t *);

typedef struct 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 */
} vfsops_t;

/*
 * VFS's.  Operates on vfs structure pointers (starts at bhv head).
 */
#define VHEAD(v)			((v)->vfs_fbhv)
#define VFS_MOUNT(v, ma,cr, rv)		((rv) = vfs_mount(VHEAD(v), ma,cr))
#define VFS_PARSEARGS(v, o,ma,f, rv)	((rv) = vfs_parseargs(VHEAD(v), o,ma,f))
#define VFS_SHOWARGS(v, m, rv)		((rv) = vfs_showargs(VHEAD(v), m))
#define VFS_UNMOUNT(v, f, cr, rv)	((rv) = vfs_unmount(VHEAD(v), f,cr))
#define VFS_MNTUPDATE(v, fl, args, rv)	((rv) = vfs_mntupdate(VHEAD(v), fl, args))
#define VFS_ROOT(v, vpp, rv)		((rv) = vfs_root(VHEAD(v), vpp))
#define VFS_STATVFS(v, sp,vp, rv)	((rv) = vfs_statvfs(VHEAD(v), sp,vp))
#define VFS_SYNC(v, flag,cr, rv)	((rv) = vfs_sync(VHEAD(v), flag,cr))
#define VFS_VGET(v, vpp,fidp, rv)	((rv) = vfs_vget(VHEAD(v), vpp,fidp))
#define VFS_DMAPIOPS(v, p, rv)		((rv) = vfs_dmapiops(VHEAD(v), p))
#define VFS_QUOTACTL(v, c,id,p, rv)	((rv) = vfs_quotactl(VHEAD(v), c,id,p))
#define VFS_INIT_VNODE(v, vp,b,ul)	( vfs_init_vnode(VHEAD(v), vp,b,ul) )
#define VFS_FORCE_SHUTDOWN(v, fl,f,l)	( vfs_force_shutdown(VHEAD(v), fl,f,l) )
#define VFS_FREEZE(v)			( vfs_freeze(VHEAD(v)) )

/*
 * PVFS's.  Operates on behavior descriptor pointers.
 */
#define PVFS_MOUNT(b, ma,cr, rv)	((rv) = vfs_mount(b, ma,cr))
#define PVFS_PARSEARGS(b, o,ma,f, rv)	((rv) = vfs_parseargs(b, o,ma,f))
#define PVFS_SHOWARGS(b, m, rv)		((rv) = vfs_showargs(b, m))
#define PVFS_UNMOUNT(b, f,cr, rv)	((rv) = vfs_unmount(b, f,cr))
#define PVFS_MNTUPDATE(b, fl, args, rv)	((rv) = vfs_mntupdate(b, fl, args))
#define PVFS_ROOT(b, vpp, rv)		((rv) = vfs_root(b, vpp))
#define PVFS_STATVFS(b, sp,vp, rv)	((rv) = vfs_statvfs(b, sp,vp))
#define PVFS_SYNC(b, flag,cr, rv)	((rv) = vfs_sync(b, flag,cr))
#define PVFS_VGET(b, vpp,fidp, rv)	((rv) = vfs_vget(b, vpp,fidp))
#define PVFS_DMAPIOPS(b, p, rv)		((rv) = vfs_dmapiops(b, p))
#define PVFS_QUOTACTL(b, c,id,p, rv)	((rv) = vfs_quotactl(b, c,id,p))
#define PVFS_INIT_VNODE(b, vp,b2,ul)	( vfs_init_vnode(b, vp,b2,ul) )
#define PVFS_FORCE_SHUTDOWN(b, fl,f,l)	( vfs_force_shutdown(b, fl,f,l) )
#define PVFS_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 vnode **);
extern int vfs_statvfs(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
extern int vfs_sync(bhv_desc_t *, int, struct cred *);
extern int vfs_vget(bhv_desc_t *, struct 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 vnode *, bhv_desc_t *, int);
extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
extern void vfs_freeze(bhv_desc_t *);

typedef struct bhv_vfsops {
	struct vfsops		bhv_common;
	void *			bhv_custom;
} bhv_vfsops_t;

#define vfs_bhv_lookup(v, id)	( bhv_lookup_range(&(v)->vfs_bh, (id), (id)) )
#define vfs_bhv_custom(b)	( ((bhv_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 vfs_t *vfs_allocate(void);
extern void vfs_deallocate(vfs_t *);
extern void vfs_insertops(vfs_t *, bhv_vfsops_t *);
extern void vfs_insertbhv(vfs_t *, bhv_desc_t *, vfsops_t *, void *);

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

#define fs_frozen(vfsp)		((vfsp)->vfs_super->s_frozen)
#define fs_check_frozen(vfsp, level) \
	vfs_check_frozen(vfsp->vfs_super, level);

#endif	/* __XFS_VFS_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_VFS_H__
	19	#define __XFS_VFS_H__
	20
	21	#include <linux/vfs.h>
	22	#include "xfs_fs.h"
	23
	24	struct fid;
	25	struct vfs;
	26	struct cred;
	27	struct vnode;
	28	struct kstatfs;
	29	struct seq_file;
	30	struct super_block;
	31	struct xfs_mount_args;
	32
	33	typedef struct kstatfs xfs_statfs_t;
	34
	35	typedef struct vfs_sync_work {
	36	struct list_head w_list;
	37	struct vfs *w_vfs;
	38	void w_data; / syncer routine argument */
	39	void (w_syncer)(struct vfs , void *);
	40	} vfs_sync_work_t;
	41
	42	typedef struct vfs {
	43	u_int vfs_flag; /* flags */
	44	xfs_fsid_t vfs_fsid; /* file system ID */
	45	xfs_fsid_t vfs_altfsid; / An ID fixed for life of FS */
	46	bhv_head_t vfs_bh; /* head of vfs behavior chain */
	47	struct super_block vfs_super; / generic superblock pointer */
	48	struct task_struct vfs_sync_task; / generalised sync thread */
	49	vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */
	50	struct list_head vfs_sync_list; /* sync thread work item list */
	51	spinlock_t vfs_sync_lock; /* work item list lock */
	52	int vfs_sync_seq; /* sync thread generation no. */
	53	wait_queue_head_t vfs_wait_single_sync_task;
1da177e4 LT	54	} vfs_t;
	55
	56	#define vfs_fbhv vfs_bh.bh_first /* 1st on vfs behavior chain */
	57
	58	#define bhvtovfs(bdp) ( (struct vfs *)BHV_VOBJ(bdp) )
	59	#define bhvtovfsops(bdp) ( (struct vfsops *)BHV_OPS(bdp) )
	60	#define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
	61	#define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )
	62
	63	#define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
	64	#define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */
	65	#define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
	66
	67	typedef enum {
	68	VFS_BHV_UNKNOWN, /* not specified */
	69	VFS_BHV_XFS, /* xfs */
	70	VFS_BHV_DM, /* data migration */
	71	VFS_BHV_QM, /* quota manager */
	72	VFS_BHV_IO, /* IO path */
	73	VFS_BHV_END /* housekeeping end-of-range */
	74	} vfs_bhv_t;
	75
	76	#define VFS_POSITION_XFS (BHV_POSITION_BASE)
	77	#define VFS_POSITION_DM (VFS_POSITION_BASE+10)
	78	#define VFS_POSITION_QM (VFS_POSITION_BASE+20)
	79	#define VFS_POSITION_IO (VFS_POSITION_BASE+30)
	80
	81	#define VFS_RDONLY 0x0001 /* read-only vfs */
	82	#define VFS_GRPID 0x0002 /* group-ID assigned from directory */
	83	#define VFS_DMI 0x0004 /* filesystem has the DMI enabled */
1da177e4 LT	84	#define VFS_END 0x0008 /* max flag */
	85
	86	#define SYNC_ATTR 0x0001 /* sync attributes */
	87	#define SYNC_CLOSE 0x0002 /* close file system down */
	88	#define SYNC_DELWRI 0x0004 /* look at delayed writes */
	89	#define SYNC_WAIT 0x0008 /* wait for i/o to complete */
	90	#define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */
	91	#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
	92	#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
	93	#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
f898d6c0	94	#define SYNC_QUIESCE 0x0100 /* quiesce fileystem for a snapshot */
1da177e4 LT	95
	96	typedef int (vfs_mount_t)(bhv_desc_t ,
	97	struct xfs_mount_args , struct cred );
	98	typedef int (vfs_parseargs_t)(bhv_desc_t , char *,
	99	struct xfs_mount_args *, int);
	100	typedef int (vfs_showargs_t)(bhv_desc_t , struct seq_file *);
	101	typedef int (vfs_unmount_t)(bhv_desc_t , int, struct cred *);
	102	typedef int (vfs_mntupdate_t)(bhv_desc_t , int *,
	103	struct xfs_mount_args *);
	104	typedef int (vfs_root_t)(bhv_desc_t , struct vnode **);
	105	typedef int (vfs_statvfs_t)(bhv_desc_t , xfs_statfs_t , struct vnode );
	106	typedef int (vfs_sync_t)(bhv_desc_t , int, struct cred *);
	107	typedef int (vfs_vget_t)(bhv_desc_t , struct vnode *, struct fid );
	108	typedef int (vfs_dmapiops_t)(bhv_desc_t , caddr_t);
	109	typedef int (vfs_quotactl_t)(bhv_desc_t , int, int, caddr_t);
	110	typedef void (vfs_init_vnode_t)(bhv_desc_t ,
	111	struct vnode , bhv_desc_t , int);
	112	typedef void (vfs_force_shutdown_t)(bhv_desc_t , int, char *, int);
	113	typedef void (vfs_freeze_t)(bhv_desc_t );
	114
	115	typedef struct vfsops {
	116	bhv_position_t vf_position; /* behavior chain position */
	117	vfs_mount_t vfs_mount; /* mount file system */
	118	vfs_parseargs_t vfs_parseargs; /* parse mount options */
	119	vfs_showargs_t vfs_showargs; /* unparse mount options */
	120	vfs_unmount_t vfs_unmount; /* unmount file system */
	121	vfs_mntupdate_t vfs_mntupdate; /* update file system options */
	122	vfs_root_t vfs_root; /* get root vnode */
	123	vfs_statvfs_t vfs_statvfs; /* file system statistics */
	124	vfs_sync_t vfs_sync; /* flush files */
	125	vfs_vget_t vfs_vget; /* get vnode from fid */
	126	vfs_dmapiops_t vfs_dmapiops; /* data migration */
	127	vfs_quotactl_t vfs_quotactl; /* disk quota */
	128	vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
	129	vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
	130	vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
	131	} vfsops_t;
	132
	133	/*
	134	* VFS's. Operates on vfs structure pointers (starts at bhv head).
	135	*/
	136	#define VHEAD(v) ((v)->vfs_fbhv)
	137	#define VFS_MOUNT(v, ma,cr, rv) ((rv) = vfs_mount(VHEAD(v), ma,cr))
	138	#define VFS_PARSEARGS(v, o,ma,f, rv) ((rv) = vfs_parseargs(VHEAD(v), o,ma,f))
	139	#define VFS_SHOWARGS(v, m, rv) ((rv) = vfs_showargs(VHEAD(v), m))
	140	#define VFS_UNMOUNT(v, f, cr, rv) ((rv) = vfs_unmount(VHEAD(v), f,cr))
	141	#define VFS_MNTUPDATE(v, fl, args, rv) ((rv) = vfs_mntupdate(VHEAD(v), fl, args))
	142	#define VFS_ROOT(v, vpp, rv) ((rv) = vfs_root(VHEAD(v), vpp))
	143	#define VFS_STATVFS(v, sp,vp, rv) ((rv) = vfs_statvfs(VHEAD(v), sp,vp))
	144	#define VFS_SYNC(v, flag,cr, rv) ((rv) = vfs_sync(VHEAD(v), flag,cr))
	145	#define VFS_VGET(v, vpp,fidp, rv) ((rv) = vfs_vget(VHEAD(v), vpp,fidp))
	146	#define VFS_DMAPIOPS(v, p, rv) ((rv) = vfs_dmapiops(VHEAD(v), p))
	147	#define VFS_QUOTACTL(v, c,id,p, rv) ((rv) = vfs_quotactl(VHEAD(v), c,id,p))
	148	#define VFS_INIT_VNODE(v, vp,b,ul) ( vfs_init_vnode(VHEAD(v), vp,b,ul) )
	149	#define VFS_FORCE_SHUTDOWN(v, fl,f,l) ( vfs_force_shutdown(VHEAD(v), fl,f,l) )
	150	#define VFS_FREEZE(v) ( vfs_freeze(VHEAD(v)) )
	151
	152	/*
	153	* PVFS's. Operates on behavior descriptor pointers.
	154	*/
	155	#define PVFS_MOUNT(b, ma,cr, rv) ((rv) = vfs_mount(b, ma,cr))
	156	#define PVFS_PARSEARGS(b, o,ma,f, rv) ((rv) = vfs_parseargs(b, o,ma,f))
	157	#define PVFS_SHOWARGS(b, m, rv) ((rv) = vfs_showargs(b, m))
	158	#define PVFS_UNMOUNT(b, f,cr, rv) ((rv) = vfs_unmount(b, f,cr))
159	#define PVFS_MNTUPDATE(b, fl, args, rv) ((rv) = vfs_mntupdate(b, fl, args))
160	#define PVFS_ROOT(b, vpp, rv) ((rv) = vfs_root(b, vpp))
161	#define PVFS_STATVFS(b, sp,vp, rv) ((rv) = vfs_statvfs(b, sp,vp))
162	#define PVFS_SYNC(b, flag,cr, rv) ((rv) = vfs_sync(b, flag,cr))
163	#define PVFS_VGET(b, vpp,fidp, rv) ((rv) = vfs_vget(b, vpp,fidp))
164	#define PVFS_DMAPIOPS(b, p, rv) ((rv) = vfs_dmapiops(b, p))
165	#define PVFS_QUOTACTL(b, c,id,p, rv) ((rv) = vfs_quotactl(b, c,id,p))
166	#define PVFS_INIT_VNODE(b, vp,b2,ul) ( vfs_init_vnode(b, vp,b2,ul) )
167	#define PVFS_FORCE_SHUTDOWN(b, fl,f,l) ( vfs_force_shutdown(b, fl,f,l) )
168	#define PVFS_FREEZE(b) ( vfs_freeze(b) )
169
170	extern int vfs_mount(bhv_desc_t , struct xfs_mount_args , struct cred *);
171	extern int vfs_parseargs(bhv_desc_t , char , struct xfs_mount_args *, int);
172	extern int vfs_showargs(bhv_desc_t , struct seq_file );
173	extern int vfs_unmount(bhv_desc_t , int, struct cred );
174	extern int vfs_mntupdate(bhv_desc_t , int , struct xfs_mount_args *);
175	extern int vfs_root(bhv_desc_t , struct vnode *);
176	extern int vfs_statvfs(bhv_desc_t , xfs_statfs_t , struct vnode *);
177	extern int vfs_sync(bhv_desc_t , int, struct cred );
178	extern int vfs_vget(bhv_desc_t , struct vnode , struct fid );
179	extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
180	extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
181	extern void vfs_init_vnode(bhv_desc_t , struct vnode , bhv_desc_t *, int);
182	extern void vfs_force_shutdown(bhv_desc_t , int, char , int);
183	extern void vfs_freeze(bhv_desc_t *);
184
185	typedef struct bhv_vfsops {
186	struct vfsops bhv_common;
187	void * bhv_custom;
188	} bhv_vfsops_t;
189
190	#define vfs_bhv_lookup(v, id) ( bhv_lookup_range(&(v)->vfs_bh, (id), (id)) )
191	#define vfs_bhv_custom(b) ( ((bhv_vfsops_t *)BHV_OPS(b))->bhv_custom )
192	#define vfs_bhv_set_custom(b,o) ( (b)->bhv_custom = (void *)(o))
193	#define vfs_bhv_clr_custom(b) ( (b)->bhv_custom = NULL )
194
195	extern vfs_t *vfs_allocate(void);
196	extern void vfs_deallocate(vfs_t *);
197	extern void vfs_insertops(vfs_t , bhv_vfsops_t );
198	extern void vfs_insertbhv(vfs_t , bhv_desc_t , vfsops_t , void );
199
200	extern void bhv_insert_all_vfsops(struct vfs *);
201	extern void bhv_remove_all_vfsops(struct vfs *, int);
202	extern void bhv_remove_vfsops(struct vfs *, int);
203
204	#define fs_frozen(vfsp) ((vfsp)->vfs_super->s_frozen)
205	#define fs_check_frozen(vfsp, level) \
206	vfs_check_frozen(vfsp->vfs_super, level);
207
208	#endif /* __XFS_VFS_H__ */