NetBSD/sys/miscfs/genfs/genfs_node.h

63 lines
2.6 KiB
C

/* $NetBSD: genfs_node.h,v 1.2 2001/09/15 22:38:40 chs Exp $ */
/*
* Copyright (c) 2001 Chuck Silvers.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chuck Silvers.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#ifndef _MISCFS_GENFS_GENFS_NODE_H_
#define _MISCFS_GENFS_GENFS_NODE_H_
struct vm_page;
struct genfs_ops {
void (*gop_size)(struct vnode *, off_t, off_t *);
int (*gop_alloc)(struct vnode *, off_t, off_t, int, struct ucred *);
int (*gop_write)(struct vnode *, struct vm_page **, int, int);
};
#define GOP_SIZE(vp, size, eobp) \
(*VTOG(vp)->g_op->gop_size)((vp), (size), (eobp))
#define GOP_ALLOC(vp, off, len, flags, cred) \
(*VTOG(vp)->g_op->gop_alloc)((vp), (off), (len), (flags), (cred))
#define GOP_WRITE(vp, pgs, npages, flags) \
(*VTOG(vp)->g_op->gop_write)((vp), (pgs), (npages), (flags))
struct genfs_node {
struct genfs_ops *g_op; /* ops vector */
struct lock g_glock; /* getpages lock */
};
#define VTOG(vp) ((struct genfs_node *)(vp)->v_data)
void genfs_size(struct vnode *, off_t, off_t *);
void genfs_node_init(struct vnode *, struct genfs_ops *);
int genfs_gop_write(struct vnode *, struct vm_page **, int, int);
#endif /* _MISCFS_GENFS_GENFS_NODE_H_ */