1 /* $NetBSD: genfs_node.h,v 1.3 2001/12/18 07:49:36 chs Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Chuck Silvers. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Chuck Silvers. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _MISCFS_GENFS_GENFS_NODE_H_ 34 #define _MISCFS_GENFS_GENFS_NODE_H_ 35 36 struct vm_page; 37 38 struct genfs_ops { 39 void (*gop_size)(struct vnode *, off_t, off_t *); 40 int (*gop_alloc)(struct vnode *, off_t, off_t, int, struct ucred *); 41 int (*gop_write)(struct vnode *, struct vm_page **, int, int); 42 }; 43 44 #define GOP_SIZE(vp, size, eobp) \ 45 (*VTOG(vp)->g_op->gop_size)((vp), (size), (eobp)) 46 #define GOP_ALLOC(vp, off, len, flags, cred) \ 47 (*VTOG(vp)->g_op->gop_alloc)((vp), (off), (len), (flags), (cred)) 48 #define GOP_WRITE(vp, pgs, npages, flags) \ 49 (*VTOG(vp)->g_op->gop_write)((vp), (pgs), (npages), (flags)) 50 51 struct genfs_node { 52 struct genfs_ops *g_op; /* ops vector */ 53 struct lock g_glock; /* getpages lock */ 54 }; 55 56 #define VTOG(vp) ((struct genfs_node *)(vp)->v_data) 57 58 void genfs_size(struct vnode *, off_t, off_t *); 59 void genfs_node_init(struct vnode *, struct genfs_ops *); 60 int genfs_gop_write(struct vnode *, struct vm_page **, int, int); 61 int genfs_compat_gop_write(struct vnode *, struct vm_page **, int, int); 62 63 #endif /* _MISCFS_GENFS_GENFS_NODE_H_ */ 64