1/* $NetBSD: rnd_private.h,v 1.11 2015/04/14 13:14:20 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Michael Graff <explorer@flame.org>. This code uses ideas and
9 * algorithms from the Linux driver written by Ted Ts'o.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef _DEV_RNDPRIVATE_H
34#define _DEV_RNDPRIVATE_H
35
36#include <sys/types.h>
37#include <sys/mutex.h>
38#include <sys/queue.h>
39#include <sys/rndio.h>
40#include <sys/rndpool.h>
41#include <sys/rndsource.h>
42
43/*
44 * Number of bytes returned per hash. This value is used in both
45 * rnd.c and rndpool.c to decide when enough entropy exists to do a
46 * hash to extract it.
47 */
48#define RND_ENTROPY_THRESHOLD 10
49
50bool rnd_extract(void *, size_t);
51bool rnd_tryextract(void *, size_t);
52void rnd_getmore(size_t);
53
54/*
55 * Flag indicating rnd_init has run.
56 */
57extern int rnd_ready;
58
59/*
60 * Debugging flags.
61 */
62#ifdef RND_DEBUG
63extern int rnd_debug;
64#define RND_DEBUG_WRITE 0x0001
65#define RND_DEBUG_READ 0x0002
66#define RND_DEBUG_IOCTL 0x0004
67#define RND_DEBUG_SNOOZE 0x0008
68#endif
69
70#endif /* _DEV_RNDPRIVATE_H */
71