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/* **********************************************************
* Copyright (C) 2007 VMware, Inc. All Rights Reserved.
* **********************************************************/
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)null.h 8.3 (Berkeley) 8/20/94
*
* $FreeBSD: src/sys/fs/nullfs/null.h,v 1.23 2005/03/15 13:49:33 jeff Exp $
*/
/*
* vmblock_k.h --
*
* Defnitions for entire vmblock module.
*/
#ifndef _VMBLOCK_K_H_
#define _VMBLOCK_K_H_
#ifdef _KERNEL
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/syslog.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include "vm_basic_types.h"
#include "vm_assert.h"
#include "block.h"
/*
* Macros
*/
#ifdef VMBLOCKFS_DEBUG
# define VMBLOCKFSDEBUG(format, args...) printf(format ,## args)
#else
# define VMBLOCKFSDEBUG(format, args...)
#endif /* VMBLOCKFS_DEBUG */
#define MNTTOVMBLOCKMNT(mp) ((struct VMBlockMount *)((mp)->mnt_data))
#define VPTOVMB(vp) ((struct VMBlockNode *)(vp)->v_data)
#define VMBTOVP(xp) ((xp)->backVnode)
/*
* Debug logging
*/
#define VMBLOCK_DEBUG LOG_DEBUG
#define VMBLOCK_ERROR LOG_WARNING
#define VMBLOCK_ENTRY_LOGLEVEL LOG_DEBUG
#define Warning(fmt, args...) log(VMBLOCK_ERROR, fmt, ##args)
#ifdef VMX86_DEVEL
# define LOG(level, fmt, args...) printf(fmt, ##args)
# define VMBLOCKDEBUG(fmt, args...) log(VMBLOCK_DEBUG, fmt, ##args)
# define Debug(level, fmt, args...) log(VMBLOCK_DEBUG, fmt, ##args)
#else
# define LOG(level, fmt, args...)
# define VMBLOCKDEBUG(fmt, args...)
# define Debug(level, fmt, args...)
#endif
/*
* Describes a single mount instance
*/
typedef struct VMBlockMount {
struct mount *mountVFS; /* Reference to mount parameters */
struct vnode *rootVnode; /* Reference to root vnode */
} VMBlockMount;
/*
* A cache of vnode references
*/
typedef struct VMBlockNode {
LIST_ENTRY(VMBlockNode) hashEntry; /* Hash chain element (contains ptr to
next node, etc.) */
struct vnode *lowerVnode; /* VREFed once */
struct vnode *backVnode; /* Back pointer */
char *name; /* Looked up path to vnode */
} VMBlockNode;
/*
* Global variables
*/
extern struct vop_vector VMBlockVnodeOps;
extern uma_zone_t VMBlockPathnameZone;
/*
* Global functions
*/
int VMBlockInit(struct vfsconf *vfsp);
int VMBlockUninit(struct vfsconf *vfsp);
int VMBlockNodeGet(struct mount *mp, struct vnode *target, struct vnode **vpp,
char *pathname);
void VMBlockHashRem(struct VMBlockNode *xp);
void VMBlockSetupFileOps(void);
int VMBlockVopBypass(struct vop_generic_args *ap);
#ifdef DIAGNOSTIC
struct vnode *VMBlockCheckVp(struct vnode *vp, char *fil, int lno);
# define VMBVPTOLOWERVP(vp) VMBlockCheckVp((vp), __FILE__, __LINE__)
#else
# define VMBVPTOLOWERVP(vp) (VPTOVMB(vp)->lowerVnode)
#endif
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_VMBLOCKFSNODE);
#endif
#endif /* _KERNEL */
#endif /* _VMBLOCK_K_H_ */
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