2 * Copyright (c) 2000-2015 Mark R. V. Murray
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef _SYS_RANDOM_H_
30 #define _SYS_RANDOM_H_
34 #include <sys/types.h>
36 #if !defined(KLD_MODULE)
37 #if defined(RANDOM_LOADABLE) && defined(RANDOM_YARROW)
38 #error "Cannot define both RANDOM_LOADABLE and RANDOM_YARROW"
44 #if defined(DEV_RANDOM)
45 u_int read_random(void *, u_int);
46 int read_random_uio(struct uio *, bool);
49 read_random_uio(void *a __unused, u_int b __unused)
54 read_random(void *a __unused, u_int b __unused)
61 * Note: if you add or remove members of random_entropy_source, remember to also update the
62 * KASSERT regarding what valid members are in random_harvest_internal(), and remember the
63 * strings in the static array random_source_descr[] in random_harvestq.c.
65 * NOTE: complain loudly to markm@ or on the lists if this enum gets more than 32
66 * distinct values (0-31)! ENTROPYSOURCE may be == 32, but not > 32.
68 enum random_entropy_source {
71 /* Environmental sources */
81 RANDOM_UMA, /* Special!! UMA/SLAB Allocator */
82 RANDOM_ENVIRONMENTAL_END = RANDOM_UMA,
83 /* Fast hardware random-number sources from here on. */
96 #define RANDOM_HARVEST_EVERYTHING_MASK ((1 << (RANDOM_ENVIRONMENTAL_END + 1)) - 1)
98 #if defined(DEV_RANDOM)
99 void random_harvest_queue(const void *, u_int, u_int, enum random_entropy_source);
100 void random_harvest_fast(const void *, u_int, u_int, enum random_entropy_source);
101 void random_harvest_direct(const void *, u_int, u_int, enum random_entropy_source);
103 #define random_harvest_queue(a, b, c, d) do {} while (0)
104 #define random_harvest_fast(a, b, c, d) do {} while (0)
105 #define random_harvest_direct(a, b, c, d) do {} while (0)
108 #if defined(RANDOM_ENABLE_UMA)
109 #define random_harvest_fast_uma(a, b, c, d) random_harvest_fast(a, b, c, d)
110 #else /* !defined(RANDOM_ENABLE_UMA) */
111 #define random_harvest_fast_uma(a, b, c, d) do {} while (0)
112 #endif /* defined(RANDOM_ENABLE_UMA) */
116 #endif /* _SYS_RANDOM_H_ */