0a6a1f1d05
This brings our tree to NetBSD 7.0, as found on -current on the 10-10-2015. This updates: - LLVM to 3.6.1 - GCC to GCC 5.1 - Replace minix/commands/zdump with usr.bin/zdump - external/bsd/libelf has moved to /external/bsd/elftoolchain/ - Import ctwm - Drop sprintf from libminc Change-Id: I149836ac18e9326be9353958bab9b266efb056f0
119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/* $NetBSD: rndsource.h,v 1.3 2015/04/21 03:53:07 riastradh Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Michael Graff <explorer@flame.org>. This code uses ideas and
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* algorithms from the Linux driver written by Ted Ts'o.
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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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* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_RNDSOURCE_H
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#define _SYS_RNDSOURCE_H
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#ifndef _KERNEL /* XXX */
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#error <sys/rndsource.h> is meant for kernel consumers only.
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#endif
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#include <sys/types.h>
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#include <sys/rndio.h> /* RND_TYPE_*, RND_FLAG_* */
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#include <sys/rngtest.h>
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typedef struct rnd_delta_estimator {
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uint64_t x;
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uint64_t dx;
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uint64_t d2x;
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uint64_t insamples;
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uint64_t outbits;
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} rnd_delta_t;
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typedef struct krndsource {
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LIST_ENTRY(krndsource) list; /* the linked list */
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char name[16]; /* device name */
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rnd_delta_t time_delta; /* time delta estimator */
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rnd_delta_t value_delta; /* value delta estimator */
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uint32_t total; /* entropy from this source */
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uint32_t type; /* type */
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uint32_t flags; /* flags */
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void *state; /* state information */
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size_t test_cnt; /* how much test data accumulated? */
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void (*get)(size_t, void *); /* pool wants N bytes (badly) */
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void *getarg; /* argument to get-function */
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void (*enable)(struct krndsource *, bool); /* turn on/off */
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rngtest_t *test; /* test data for RNG type sources */
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unsigned refcnt;
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} krndsource_t;
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static inline void
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rndsource_setcb(struct krndsource *const rs, void (*const cb)(size_t, void *),
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void *const arg)
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{
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rs->get = cb;
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rs->getarg = arg;
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}
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static inline void
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rndsource_setenable(struct krndsource *const rs, void *const cb)
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{
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rs->enable = cb;
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}
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#define RND_ENABLED(rp) \
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(((rp)->flags & RND_FLAG_NO_COLLECT) == 0)
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void _rnd_add_uint32(krndsource_t *, uint32_t);
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void _rnd_add_uint64(krndsource_t *, uint64_t);
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void rnd_add_data(krndsource_t *, const void *const, uint32_t,
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uint32_t);
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void rnd_attach_source(krndsource_t *, const char *,
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uint32_t, uint32_t);
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void rnd_detach_source(krndsource_t *);
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static inline void
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rnd_add_uint32(krndsource_t *kr, uint32_t val)
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{
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if (__predict_true(kr)) {
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if (RND_ENABLED(kr)) {
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_rnd_add_uint32(kr, val);
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}
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} else {
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rnd_add_data(NULL, &val, sizeof(val), 0);
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}
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}
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static inline void
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rnd_add_uint64(krndsource_t *kr, uint64_t val)
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{
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if (__predict_true(kr)) {
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if (RND_ENABLED(kr)) {
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_rnd_add_uint64(kr, val);
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}
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} else {
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rnd_add_data(NULL, &val, sizeof(val), 0);
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}
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}
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#endif /* _SYS_RNDSOURCE_H */
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