[a9153ec] | 1 | /*- |
---|
[c40e45b] | 2 | * Copyright (c) 2000-2015 Mark R. V. Murray |
---|
[a9153ec] | 3 | * All rights reserved. |
---|
| 4 | * |
---|
| 5 | * Redistribution and use in source and binary forms, with or without |
---|
| 6 | * modification, are permitted provided that the following conditions |
---|
| 7 | * are met: |
---|
| 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. |
---|
| 14 | * |
---|
| 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. |
---|
| 25 | * |
---|
| 26 | * $FreeBSD$ |
---|
| 27 | */ |
---|
| 28 | |
---|
[e599318] | 29 | #ifndef _SYS_RANDOM_H_ |
---|
| 30 | #define _SYS_RANDOM_H_ |
---|
[a9153ec] | 31 | |
---|
| 32 | #ifdef _KERNEL |
---|
| 33 | |
---|
[c40e45b] | 34 | #include <sys/types.h> |
---|
| 35 | |
---|
| 36 | #if !defined(KLD_MODULE) |
---|
| 37 | #if defined(RANDOM_LOADABLE) && defined(RANDOM_YARROW) |
---|
| 38 | #error "Cannot define both RANDOM_LOADABLE and RANDOM_YARROW" |
---|
| 39 | #endif |
---|
| 40 | #endif |
---|
| 41 | |
---|
| 42 | struct uio; |
---|
| 43 | |
---|
| 44 | #if defined(DEV_RANDOM) |
---|
| 45 | u_int read_random(void *, u_int); |
---|
| 46 | int read_random_uio(struct uio *, bool); |
---|
| 47 | #else |
---|
| 48 | static __inline int |
---|
| 49 | read_random_uio(void *a __unused, u_int b __unused) |
---|
| 50 | { |
---|
| 51 | return (0); |
---|
| 52 | } |
---|
| 53 | static __inline u_int |
---|
| 54 | read_random(void *a __unused, u_int b __unused) |
---|
| 55 | { |
---|
| 56 | return (0); |
---|
| 57 | } |
---|
| 58 | #endif |
---|
[a9153ec] | 59 | |
---|
| 60 | /* |
---|
[c40e45b] | 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. |
---|
| 64 | * |
---|
| 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. |
---|
[a9153ec] | 67 | */ |
---|
[c40e45b] | 68 | enum random_entropy_source { |
---|
[a9153ec] | 69 | RANDOM_START = 0, |
---|
[c40e45b] | 70 | RANDOM_CACHED = 0, |
---|
| 71 | /* Environmental sources */ |
---|
| 72 | RANDOM_ATTACH, |
---|
[a9153ec] | 73 | RANDOM_KEYBOARD, |
---|
| 74 | RANDOM_MOUSE, |
---|
[c40e45b] | 75 | RANDOM_NET_TUN, |
---|
| 76 | RANDOM_NET_ETHER, |
---|
| 77 | RANDOM_NET_NG, |
---|
[a9153ec] | 78 | RANDOM_INTERRUPT, |
---|
[c40e45b] | 79 | RANDOM_SWI, |
---|
| 80 | RANDOM_FS_ATIME, |
---|
| 81 | RANDOM_UMA, /* Special!! UMA/SLAB Allocator */ |
---|
| 82 | RANDOM_ENVIRONMENTAL_END = RANDOM_UMA, |
---|
| 83 | /* Fast hardware random-number sources from here on. */ |
---|
| 84 | RANDOM_PURE_OCTEON, |
---|
| 85 | RANDOM_PURE_SAFE, |
---|
| 86 | RANDOM_PURE_GLXSB, |
---|
| 87 | RANDOM_PURE_UBSEC, |
---|
| 88 | RANDOM_PURE_HIFN, |
---|
| 89 | RANDOM_PURE_RDRAND, |
---|
| 90 | RANDOM_PURE_NEHEMIAH, |
---|
| 91 | RANDOM_PURE_RNDTEST, |
---|
| 92 | RANDOM_PURE_VIRTIO, |
---|
| 93 | RANDOM_PURE_BROADCOM, |
---|
[a9153ec] | 94 | ENTROPYSOURCE |
---|
| 95 | }; |
---|
| 96 | |
---|
[c40e45b] | 97 | #define RANDOM_HARVEST_EVERYTHING_MASK ((1 << (RANDOM_ENVIRONMENTAL_END + 1)) - 1) |
---|
| 98 | |
---|
| 99 | #if defined(DEV_RANDOM) |
---|
| 100 | void random_harvest_queue(const void *, u_int, u_int, enum random_entropy_source); |
---|
| 101 | void random_harvest_fast(const void *, u_int, u_int, enum random_entropy_source); |
---|
| 102 | void random_harvest_direct(const void *, u_int, u_int, enum random_entropy_source); |
---|
| 103 | #else |
---|
| 104 | #define random_harvest_queue(a, b, c, d) do {} while (0) |
---|
| 105 | #define random_harvest_fast(a, b, c, d) do {} while (0) |
---|
| 106 | #define random_harvest_direct(a, b, c, d) do {} while (0) |
---|
| 107 | #endif |
---|
[a9153ec] | 108 | |
---|
[c40e45b] | 109 | #if defined(RANDOM_ENABLE_UMA) |
---|
| 110 | #define random_harvest_fast_uma(a, b, c, d) random_harvest_fast(a, b, c, d) |
---|
| 111 | #else /* !defined(RANDOM_ENABLE_UMA) */ |
---|
| 112 | #define random_harvest_fast_uma(a, b, c, d) do {} while (0) |
---|
| 113 | #endif /* defined(RANDOM_ENABLE_UMA) */ |
---|
[a9153ec] | 114 | |
---|
| 115 | #endif /* _KERNEL */ |
---|
| 116 | |
---|
[e599318] | 117 | #endif /* _SYS_RANDOM_H_ */ |
---|