docs/how-to-build.md: use proper markup for directory names
[unleashed/tickless.git] / include / sys / fbuf.h
blob3446337bfe65d9b41737516bed962457c857c183
1 /*
2 * CDDL HEADER START
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
20 * CDDL HEADER END
23 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
25 * Copyright (c) 1997-1998 by Sun Microsystems, Inc.
26 * All rights reserved.
29 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
30 /* All Rights Reserved */
33 #ifndef _SYS_FBUF_H
34 #define _SYS_FBUF_H
36 #include <sys/vnode.h>
38 #ifdef __cplusplus
39 extern "C" {
40 #endif
43 * A struct fbuf is used to get a mapping to part of a file using the
44 * segkmap facilities. After you get a mapping, you can fbrelse() it
45 * (giving a seg code to pass back to segmap_release), you can fbwrite()
46 * it (causes a synchronous write back using the file mapping information),
47 * or you can fbiwrite it (causing indirect synchronous write back to
48 * the block number given without using the file mapping information).
51 struct fbuf {
52 caddr_t fb_addr;
53 uint_t fb_count;
56 extern int fbread(struct vnode *, offset_t, uint_t, enum seg_rw,
57 struct fbuf **);
58 extern void fbzero(struct vnode *, offset_t, uint_t, struct fbuf **);
59 extern int fbwrite(struct fbuf *);
60 extern int fbdwrite(struct fbuf *);
61 extern int fbiwrite(struct fbuf *, struct vnode *, daddr_t bn, int bsize);
62 extern void fbrelse(struct fbuf *, enum seg_rw);
64 #ifdef __cplusplus
66 #endif
68 #endif /* _SYS_FBUF_H */