/*	$NetBSD$	*/

/*-
 * Copyright (c) 2014 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Taylor R Campbell.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * XXX NOTE NOTE NOTE XXX
 *
 * This code does not actually work.  It is a draft of an idea.  It
 * probably won't even compile, even if you make it include the right
 * header files.
 */

/* inode->vnode table */

struct vinotab;

struct vinoent {
	LIST_ENTRY(vinoent)	vie_entry;
	struct vnode		*vie_vnode;
	const void		*vie_key;
	unsigned int		vie_keysize;
};

#define	VINO_KEYSIZE_MAX	UINT_MAX

struct vinotab *
	vinotab_create(void);
void	vinotab_destroy(struct vinotab *);
int	vinotab_get(struct vinotab *, const void *, int, struct vnode **);
int	vinotab_intern(struct vinotab *, struct vinoent *, const void *,
	    struct vnode *, int, struct vnode **);
void	vinotab_remove(struct vinotab *, struct vinoent *);

/* For ITOV-type operations.  Caller must have a reference already.  */
static inline struct vnode *
vinoent_vnode(struct vinoent *vinoent)
{

	KASSERT(vinoent->vie_vnode != NULL);
	KASSERT(0 < vinoent->vie_vnode->v_usecount);

	return vinoent->vie_vnode;
}