117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/*-
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* Copyright (c) 2000-2015 Mark R. V. Murray
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_RANDOM_H_
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#define _SYS_RANDOM_H_
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#ifdef _KERNEL
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#include <sys/types.h>
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#if !defined(KLD_MODULE)
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#if defined(RANDOM_LOADABLE) && defined(RANDOM_YARROW)
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#error "Cannot define both RANDOM_LOADABLE and RANDOM_YARROW"
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#endif
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#endif
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struct uio;
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#if defined(DEV_RANDOM)
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u_int read_random(void *, u_int);
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int read_random_uio(struct uio *, bool);
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#else
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static __inline int
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read_random_uio(void *a __unused, u_int b __unused)
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{
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return (0);
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}
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static __inline u_int
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read_random(void *a __unused, u_int b __unused)
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{
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return (0);
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}
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#endif
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/*
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* Note: if you add or remove members of random_entropy_source, remember to also update the
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* KASSERT regarding what valid members are in random_harvest_internal(), and remember the
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* strings in the static array random_source_descr[] in random_harvestq.c.
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*
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* NOTE: complain loudly to markm@ or on the lists if this enum gets more than 32
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* distinct values (0-31)! ENTROPYSOURCE may be == 32, but not > 32.
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*/
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enum random_entropy_source {
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RANDOM_START = 0,
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RANDOM_CACHED = 0,
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/* Environmental sources */
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RANDOM_ATTACH,
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RANDOM_KEYBOARD,
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RANDOM_MOUSE,
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RANDOM_NET_TUN,
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RANDOM_NET_ETHER,
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RANDOM_NET_NG,
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RANDOM_INTERRUPT,
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RANDOM_SWI,
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RANDOM_FS_ATIME,
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RANDOM_UMA, /* Special!! UMA/SLAB Allocator */
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RANDOM_ENVIRONMENTAL_END = RANDOM_UMA,
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/* Fast hardware random-number sources from here on. */
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RANDOM_PURE_OCTEON,
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RANDOM_PURE_SAFE,
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RANDOM_PURE_GLXSB,
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RANDOM_PURE_UBSEC,
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RANDOM_PURE_HIFN,
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RANDOM_PURE_RDRAND,
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RANDOM_PURE_NEHEMIAH,
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RANDOM_PURE_RNDTEST,
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RANDOM_PURE_VIRTIO,
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ENTROPYSOURCE
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};
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#define RANDOM_HARVEST_EVERYTHING_MASK ((1 << (RANDOM_ENVIRONMENTAL_END + 1)) - 1)
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#if defined(DEV_RANDOM)
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void random_harvest_queue(const void *, u_int, u_int, enum random_entropy_source);
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void random_harvest_fast(const void *, u_int, u_int, enum random_entropy_source);
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void random_harvest_direct(const void *, u_int, u_int, enum random_entropy_source);
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#else
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#define random_harvest_queue(a, b, c, d) do {} while (0)
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#define random_harvest_fast(a, b, c, d) do {} while (0)
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#define random_harvest_direct(a, b, c, d) do {} while (0)
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#endif
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#if defined(RANDOM_ENABLE_UMA)
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#define random_harvest_fast_uma(a, b, c, d) random_harvest_fast(a, b, c, d)
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#else /* !defined(RANDOM_ENABLE_UMA) */
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#define random_harvest_fast_uma(a, b, c, d) do {} while (0)
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#endif /* defined(RANDOM_ENABLE_UMA) */
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#endif /* _KERNEL */
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#endif /* _SYS_RANDOM_H_ */
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