69 lines
2.9 KiB
C
69 lines
2.9 KiB
C
/* $NetBSD: genfs_node.h,v 1.5 2003/09/24 10:22:53 yamt 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);
|
|
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, flags) \
|
|
(*VTOG(vp)->g_op->gop_size)((vp), (size), (eobp), (flags))
|
|
#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))
|
|
|
|
/* Flags to GOP_SIZE */
|
|
#define GOP_SIZE_READ 0x1 /* Advise how many pages to read */
|
|
#define GOP_SIZE_WRITE 0x2 /* Tell how many pages to write */
|
|
#define GOP_SIZE_MEM 0x4 /* in-memory size */
|
|
|
|
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 *, int);
|
|
void genfs_node_init(struct vnode *, struct genfs_ops *);
|
|
int genfs_gop_write(struct vnode *, struct vm_page **, int, int);
|
|
int genfs_compat_gop_write(struct vnode *, struct vm_page **, int, int);
|
|
|
|
#endif /* _MISCFS_GENFS_GENFS_NODE_H_ */
|