1 /*- 2 * Copyright (c) 2000-2013 Mark R. V. Murray 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 29 #ifndef _SYS_RANDOM_H_ 30 #define _SYS_RANDOM_H_ 31 32 #ifdef _KERNEL 33 34 #include <sys/types.h> 35 36 struct uio; 37 38 u_int read_random(void *, u_int); 39 int read_random_uio(struct uio *, bool); 40 41 /* 42 * Note: if you add or remove members of random_entropy_source, remember to also update the 43 * KASSERT regarding what valid members are in random_harvest_internal(), and remember the 44 * strings in the static array random_source_descr[] in random_harvestq.c. 45 * 46 * NOTE: complain loudly to markm@ or on the lists if this enum gets more than 32 47 * distinct values (0-31)! ENTROPYSOURCE may be == 32, but not > 32. 48 */ 49 enum random_entropy_source { 50 RANDOM_START = 0, 51 RANDOM_CACHED = 0, 52 /* Environmental sources */ 53 RANDOM_ATTACH, 54 RANDOM_KEYBOARD, 55 RANDOM_MOUSE, 56 RANDOM_NET_TUN, 57 RANDOM_NET_ETHER, 58 RANDOM_NET_NG, 59 RANDOM_INTERRUPT, 60 RANDOM_SWI, 61 RANDOM_FS_ATIME, 62 RANDOM_FAST, /* Special!! Miscellaneous high performance stuff, like UMA/SLAB Allocator */ 63 RANDOM_ENVIRONMENTAL_END = RANDOM_FAST, 64 /* Fast hardware random-number sources from here on. */ 65 RANDOM_PURE_OCTEON, 66 RANDOM_PURE_SAFE, 67 RANDOM_PURE_GLXSB, 68 RANDOM_PURE_UBSEC, 69 RANDOM_PURE_HIFN, 70 RANDOM_PURE_RDRAND, 71 RANDOM_PURE_NEHEMIAH, 72 RANDOM_PURE_RNDTEST, 73 RANDOM_PURE_VIRTIO, 74 ENTROPYSOURCE 75 }; 76 77 #define RANDOM_HARVEST_EVERYTHING_MASK ((1 << (RANDOM_ENVIRONMENTAL_END + 1)) - 1) 78 79 #if defined(RANDOM_DUMMY) 80 #define random_harvest_queue(a, b, c, d) do {} while (0) 81 #define random_harvest_fast(a, b, c, d) do {} while (0) 82 #define random_harvest_direct(a, b, c, d) do {} while (0) 83 #else /* !defined(RANDOM_DUMMY) */ 84 void random_harvest_queue(const void *, u_int, u_int, enum random_entropy_source); 85 void random_harvest_fast(const void *, u_int, u_int, enum random_entropy_source); 86 void random_harvest_direct(const void *, u_int, u_int, enum random_entropy_source); 87 #endif /* defined(RANDOM_DUMMY) */ 88 89 #endif /* _KERNEL */ 90 91 #endif /* _SYS_RANDOM_H_ */ 92