1 | /*- |
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2 | * Copyright (c) 2000-2015 Mark R. V. Murray |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer |
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10 | * in this position and unchanged. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * |
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15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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25 | * |
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26 | * $FreeBSD$ |
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27 | */ |
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28 | |
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29 | #ifndef _SYS_RANDOM_H_ |
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30 | #define _SYS_RANDOM_H_ |
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31 | |
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32 | #ifdef _KERNEL |
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33 | |
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34 | #include <sys/types.h> |
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35 | |
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36 | #if !defined(KLD_MODULE) |
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37 | #if defined(RANDOM_LOADABLE) && defined(RANDOM_YARROW) |
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38 | #error "Cannot define both RANDOM_LOADABLE and RANDOM_YARROW" |
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39 | #endif |
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40 | #endif |
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41 | |
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42 | struct uio; |
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43 | |
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44 | #if defined(DEV_RANDOM) |
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45 | u_int read_random(void *, u_int); |
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46 | int read_random_uio(struct uio *, bool); |
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47 | #else |
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48 | static __inline int |
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49 | read_random_uio(void *a __unused, u_int b __unused) |
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50 | { |
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51 | return (0); |
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52 | } |
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53 | static __inline u_int |
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54 | read_random(void *a __unused, u_int b __unused) |
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55 | { |
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56 | return (0); |
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57 | } |
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58 | #endif |
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59 | |
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60 | /* |
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61 | * Note: if you add or remove members of random_entropy_source, remember to also update the |
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62 | * KASSERT regarding what valid members are in random_harvest_internal(), and remember the |
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63 | * strings in the static array random_source_descr[] in random_harvestq.c. |
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64 | * |
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65 | * NOTE: complain loudly to markm@ or on the lists if this enum gets more than 32 |
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66 | * distinct values (0-31)! ENTROPYSOURCE may be == 32, but not > 32. |
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67 | */ |
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68 | enum random_entropy_source { |
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69 | RANDOM_START = 0, |
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70 | RANDOM_CACHED = 0, |
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71 | /* Environmental sources */ |
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72 | RANDOM_ATTACH, |
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73 | RANDOM_KEYBOARD, |
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74 | RANDOM_MOUSE, |
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75 | RANDOM_NET_TUN, |
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76 | RANDOM_NET_ETHER, |
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77 | RANDOM_NET_NG, |
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78 | RANDOM_INTERRUPT, |
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79 | RANDOM_SWI, |
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80 | RANDOM_FS_ATIME, |
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81 | RANDOM_UMA, /* Special!! UMA/SLAB Allocator */ |
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82 | RANDOM_ENVIRONMENTAL_END = RANDOM_UMA, |
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83 | /* Fast hardware random-number sources from here on. */ |
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84 | RANDOM_PURE_OCTEON, |
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85 | RANDOM_PURE_SAFE, |
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86 | RANDOM_PURE_GLXSB, |
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87 | RANDOM_PURE_UBSEC, |
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88 | RANDOM_PURE_HIFN, |
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89 | RANDOM_PURE_RDRAND, |
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90 | RANDOM_PURE_NEHEMIAH, |
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91 | RANDOM_PURE_RNDTEST, |
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92 | RANDOM_PURE_VIRTIO, |
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93 | RANDOM_PURE_BROADCOM, |
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94 | ENTROPYSOURCE |
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95 | }; |
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96 | |
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97 | #define RANDOM_HARVEST_EVERYTHING_MASK ((1 << (RANDOM_ENVIRONMENTAL_END + 1)) - 1) |
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98 | |
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99 | #if defined(DEV_RANDOM) |
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100 | void random_harvest_queue(const void *, u_int, u_int, enum random_entropy_source); |
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101 | void random_harvest_fast(const void *, u_int, u_int, enum random_entropy_source); |
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102 | void random_harvest_direct(const void *, u_int, u_int, enum random_entropy_source); |
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103 | #else |
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104 | #define random_harvest_queue(a, b, c, d) do {} while (0) |
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105 | #define random_harvest_fast(a, b, c, d) do {} while (0) |
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106 | #define random_harvest_direct(a, b, c, d) do {} while (0) |
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107 | #endif |
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108 | |
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109 | #if defined(RANDOM_ENABLE_UMA) |
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110 | #define random_harvest_fast_uma(a, b, c, d) random_harvest_fast(a, b, c, d) |
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111 | #else /* !defined(RANDOM_ENABLE_UMA) */ |
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112 | #define random_harvest_fast_uma(a, b, c, d) do {} while (0) |
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113 | #endif /* defined(RANDOM_ENABLE_UMA) */ |
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114 | |
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115 | #endif /* _KERNEL */ |
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116 | |
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117 | #endif /* _SYS_RANDOM_H_ */ |
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