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Initial revision

#ifndef _XFS_HANDLE_H
#define _XFS_HANDLE_H

#ident	"$Revision: 1.1 $"

/*
 *  Ok.  This file contains stuff that defines a general handle
 *  mechanism, except that it's only used by xfs at the moment.
 *  Imagine that it's in some generic place.  The same goes for
 *  xfs_handle.c; it's would-be generic but xfs-only right now.
 */

#ifdef _KERNEL

/*
 *  This is called a dmi_handle because it uses the DMI version of
 *  a file system identifier in the vfs (*vfs_dmi).  It also isn't
 *  inherently xfs specific, although xfs is currently the only FS
 *  that supports it.
 */

typedef	struct handle {
	fsid_t	ha_fsid;		/* unique file system identifier */
	fid_t	ha_fid;			/* file system specific file ID */
} handle_t;

/*
 *  Kernel only prototypes.
 */

int	path_to_handle		(char *path, void *hbuf, size_t *hlen);
int	path_to_fshandle	(char *path, void *hbuf, size_t *hlen);
int	fd_to_handle		(int	 fd, void *hbuf, size_t *hlen);
int	open_by_handle		(void *hbuf, size_t hlen, int rw, rval_t *rvp);
int	gethandle		(void *hanp, size_t hlen, handle_t *handlep);

struct vnode *	handle_to_vp (handle_t *handlep);
int		vp_to_handle (vnode_t *vp, handle_t *handlep);

/*
 *  Kernel #defines.
 */

#define	HSIZE(handle)	(((char *) &(handle).ha_fid.fid_data - \
			  (char *) &(handle)) + (handle).ha_fid.fid_len)

#endif	/* _KERNEL */

#ifndef _KERNEL

/*
 *  Prototypes.
 */

int	path_to_handle		(char *path, void **hanp, size_t *hlen);
int	path_to_fshandle	(char *path, void **hanp, size_t *hlen);
int	fd_to_handle		(int	 fd, void **hanp, size_t *hlen);
int	open_by_handle		(void *hanp, size_t hlen, int rw);

#endif	/* notdef _KERNEL */

#endif	/* _XFS_HANDLE_H */