6c8f7fc3ba
. add all sys/sys headers not already present to help compiling . take netbsd dirent.h and struct dirent; main result is introducing d_type and d_namlen that have to be set by getdents() in all FS code implementing it . d_off is gone . alignment of the struct has become 8 bytes instead of 4 . remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE . libminlib: cleanup unused yet duplicate code . mfs: throw out the long-broken v1, v2 support . new test for dirent contents filled by getdents() Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
243 lines
8.0 KiB
C
243 lines
8.0 KiB
C
/* $NetBSD: rnd.h,v 1.33 2012/09/05 18:57:33 tls 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_RND_H_
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#define _SYS_RND_H_
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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#endif /* !_KERNEL */
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#include <sys/types.h>
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#include <sys/sha1.h>
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#ifdef _KERNEL
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#endif
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#ifdef _KERNEL
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#include <sys/rngtest.h>
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#endif
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#define RND_DEV_RANDOM 0 /* minor devices for random and kinda random */
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#define RND_DEV_URANDOM 1
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/*
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* Exposed "size" of entropy pool, for convenience in load/save
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* from userspace. Do not assume this is the same as the actual in-kernel
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* pool size!
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*/
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#define RND_SAVEWORDS 128
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typedef struct {
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uint32_t entropy;
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uint8_t data[RND_SAVEWORDS * sizeof(uint32_t)];
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uint8_t digest[SHA1_DIGEST_LENGTH];
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} rndsave_t;
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/* Statistics exposed by RNDGETPOOLSTAT */
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typedef struct
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{
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uint32_t poolsize;
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uint32_t threshold;
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uint32_t maxentropy;
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uint32_t added;
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uint32_t curentropy;
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uint32_t removed;
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uint32_t discarded;
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uint32_t generated;
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} rndpoolstat_t;
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/* Sanitized random source view for userspace */
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typedef struct {
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char name[16]; /* device name */
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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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} rndsource_t;
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/*
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* Flags to control the source. Low byte is type, upper bits are flags.
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*/
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#define RND_FLAG_NO_ESTIMATE 0x00000100 /* don't estimate entropy */
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#define RND_FLAG_NO_COLLECT 0x00000200 /* don't collect entropy */
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#define RND_TYPE_UNKNOWN 0 /* unknown source */
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#define RND_TYPE_DISK 1 /* source is physical disk */
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#define RND_TYPE_NET 2 /* source is a network device */
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#define RND_TYPE_TAPE 3 /* source is a tape drive */
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#define RND_TYPE_TTY 4 /* source is a tty device */
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#define RND_TYPE_RNG 5 /* source is a hardware RNG */
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#define RND_TYPE_SKEW 6 /* source is skew between clocks */
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#define RND_TYPE_ENV 7 /* source is temp or fan sensor */
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#define RND_TYPE_VM 8 /* source is VM system events */
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#define RND_TYPE_POWER 9 /* source is power events */
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#define RND_TYPE_MAX 9 /* last type id used */
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#ifdef _KERNEL
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/*
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* Size of entropy pool in 32-bit words. This _MUST_ be a power of 2. Don't
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* change this unless you really know what you are doing...
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*/
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#ifndef RND_POOLWORDS
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#define RND_POOLWORDS 128
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#endif
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#define RND_POOLBITS (RND_POOLWORDS * 32)
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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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uint32_t last_time; /* last time recorded */
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uint32_t last_delta; /* last delta value */
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uint32_t last_delta2; /* last delta2 value */
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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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rngtest_t *test; /* test data for RNG type sources */
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} krndsource_t;
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enum rsink_st {
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RSTATE_IDLE = 0,
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RSTATE_PENDING,
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RSTATE_HASBITS
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};
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typedef struct rndsink {
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TAILQ_ENTRY(rndsink) tailq; /* the queue */
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kmutex_t mtx; /* lock to seed or unregister */
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enum rsink_st state; /* in-use? filled? */
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void (*cb)(void *); /* callback function when ready */
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void *arg; /* callback function argument */
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char name[16]; /* sink name */
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size_t len; /* how many bytes wanted/supplied */
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uint8_t data[64]; /* random data returned here */
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} rndsink_t;
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typedef struct {
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uint32_t cursor; /* current add point in the pool */
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uint32_t rotate; /* how many bits to rotate by */
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rndpoolstat_t stats; /* current statistics */
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uint32_t pool[RND_POOLWORDS]; /* random pool data */
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} rndpool_t;
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#define RND_ENABLED(rp) \
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(((rp)->flags & RND_FLAG_NO_COLLECT) == 0)
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void rndpool_init(rndpool_t *);
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void rndpool_init_global(void);
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uint32_t rndpool_get_entropy_count(rndpool_t *);
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void rndpool_get_stats(rndpool_t *, void *, int);
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void rndpool_increment_entropy_count(rndpool_t *, uint32_t);
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uint32_t *rndpool_get_pool(rndpool_t *);
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uint32_t rndpool_get_poolsize(void);
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void rndpool_add_data(rndpool_t *, void *, uint32_t, uint32_t);
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uint32_t rndpool_extract_data(rndpool_t *, void *, uint32_t, uint32_t);
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void rnd_init(void);
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void _rnd_add_uint32(krndsource_t *, uint32_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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void rndsink_attach(rndsink_t *);
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void rndsink_detach(rndsink_t *);
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void rnd_seed(void *, size_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 (RND_ENABLED(kr)) {
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_rnd_add_uint32(kr, val);
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}
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}
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extern int rnd_full;
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extern int rnd_filled;
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extern int rnd_initial_entropy;
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#endif /* _KERNEL */
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#define RND_MAXSTATCOUNT 10 /* 10 sources at once max */
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/*
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* return "count" random entries, starting at "start"
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*/
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typedef struct {
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uint32_t start;
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uint32_t count;
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rndsource_t source[RND_MAXSTATCOUNT];
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} rndstat_t;
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/*
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* return information on a specific source by name
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*/
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typedef struct {
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char name[16];
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rndsource_t source;
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} rndstat_name_t;
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/*
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* set/clear device flags. If type is set to 0xff, the name is used
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* instead. Otherwise, the flags set/cleared apply to all devices of
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* the specified type, and the name is ignored.
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*/
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typedef struct {
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char name[16]; /* the name we are adjusting */
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uint32_t type; /* the type of device we want */
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uint32_t flags; /* flags to set or clear */
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uint32_t mask; /* mask for the flags we are setting */
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} rndctl_t;
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/*
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* Add entropy to the pool. len is the data length, in bytes.
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* entropy is the number of bits of estimated entropy in the data.
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*/
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typedef struct {
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uint32_t len;
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uint32_t entropy;
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u_char data[RND_SAVEWORDS * sizeof(uint32_t)];
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} rnddata_t;
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#define RNDGETENTCNT _IOR('R', 101, uint32_t) /* get entropy count */
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#define RNDGETSRCNUM _IOWR('R', 102, rndstat_t) /* get rnd source info */
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#define RNDGETSRCNAME _IOWR('R', 103, rndstat_name_t) /* get src by name */
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#define RNDCTL _IOW('R', 104, rndctl_t) /* set/clear source flags */
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#define RNDADDDATA _IOW('R', 105, rnddata_t) /* add data to the pool */
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#define RNDGETPOOLSTAT _IOR('R', 106, rndpoolstat_t) /* get statistics */
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#endif /* !_SYS_RND_H_ */
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