1 /* $NetBSD: rnd.h,v 1.7 2019/06/27 02:44:54 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997,2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Michael Graff <explorer (at) flame.org>. This code uses ideas and 9 * algorithms from the Linux driver written by Ted Ts'o. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _COMPAT_SYS_RND_H_ 34 #define _COMPAT_SYS_RND_H_ 35 36 #if defined(_KERNEL_OPT) 37 #include "opt_compat_netbsd.h" 38 #include "opt_compat_netbsd32.h" 39 #endif 40 41 #include <sys/types.h> 42 #include <sys/ioctl.h> 43 44 #ifdef COMPAT_NETBSD32 45 #include <compat/netbsd32/netbsd32.h> 46 #endif /* COMPAT_NETBSD32 */ 47 48 #include <sys/rndio.h> 49 50 /* 51 * NetBSD-5 used "void *state" in the rndsource_t struct. rndsource_t 52 * was used in rnstat_t and rnstat_name_t, which were used by 53 * the NetBSD-5 RNDGETSRCNUM and RNDGETSRCNAME ioctls. 54 * 55 */ 56 57 /* Sanitized random source view for userspace. */ 58 typedef struct { 59 char name[16]; /* device name */ 60 uint32_t unused_time; /* was: last time recorded */ 61 uint32_t unused_delta; /* was: last delta value */ 62 uint32_t unused_delta2; /* was: last delta2 value */ 63 uint32_t total; /* entropy from this source */ 64 uint32_t type; /* type */ 65 uint32_t flags; /* flags */ 66 void *unused_state; /* was: internal state */ 67 } rndsource50_t; 68 69 #ifdef COMPAT_NETBSD32 70 typedef struct { 71 char name[16]; /* device name */ 72 uint32_t unused_time; /* was: last time recorded */ 73 uint32_t unused_delta; /* was: last delta value */ 74 uint32_t unused_delta2; /* was: last delta2 value */ 75 uint32_t total; /* entropy from this source */ 76 uint32_t type; /* type */ 77 uint32_t flags; /* flags */ 78 netbsd32_voidp unused_state; /* was: internal state */ 79 } rndsource50_32_t; 80 #endif /* COMPAT_NETBSD32 */ 81 82 /* 83 * NetBSD-5 defined RND_MAXSTATCOUNT as 10. We define RND_MAXSTATCOUNT50 84 * here, and check that the native RND_MAXSTATCOUNT is not smaller. 85 */ 86 #define RND_MAXSTATCOUNT50 10 /* 10 sources at once max */ 87 #if (RND_MAXSTATCOUNT50 > RND_MAXSTATCOUNT) 88 #error "RND_MAXSTATCOUNT50 is too large" 89 #endif 90 91 /* 92 * return "count" random entries, starting at "start" 93 */ 94 typedef struct { 95 uint32_t start; 96 uint32_t count; 97 rndsource50_t source[RND_MAXSTATCOUNT50]; 98 } rndstat50_t; 99 100 #ifdef COMPAT_NETBSD32 101 typedef struct { 102 uint32_t start; 103 uint32_t count; 104 rndsource50_32_t source[RND_MAXSTATCOUNT50]; 105 } rndstat50_32_t; 106 #endif /* COMPAT_NETBSD32 */ 107 108 /* 109 * return information on a specific source by name 110 */ 111 typedef struct { 112 char name[16]; 113 rndsource50_t source; 114 } rndstat_name50_t; 115 116 #ifdef COMPAT_NETBSD32 117 typedef struct { 118 char name[16]; 119 rndsource50_32_t source; 120 } rndstat_name50_32_t; 121 #endif /* COMPAT_NETBSD32 */ 122 123 /* 124 * NetBSD-5 defined RND_POOLWORDS as 128. In NetBSD-6, the value 125 * exposed to userland via the rnddata_t type was renamed to 126 * RND_SAVEWORDS. As long as RND_SAVEWORDS remains equal to 128, then 127 * rnddata_t (used by ioctl RNDADDATA), and rndpoolstat_t (used by ioctl 128 * RNDGETPOOLSTAT) remain ABI compatible without any extra effort, even 129 * though the declarations in the source code have changed. 130 */ 131 #if (RND_SAVEWORDS != 128) 132 #error "RND_SAVEWORDS must be 128 for NetBSD-5 compatibility" 133 #endif 134 135 /* 136 * Compatibility with NetBSD-5 ioctls. 137 */ 138 #ifdef _KERNEL 139 int compat_50_rnd_ioctl(struct file *, u_long, void *); 140 int compat32_50_rnd_ioctl(struct file *, u_long, void *); 141 #endif 142 143 #define RNDGETSRCNUM50 _IOWR('R', 102, rndstat50_t) 144 #define RNDGETSRCNAME50 _IOWR('R', 103, rndstat_name50_t) 145 146 #ifdef COMPAT_NETBSD32 147 #define RNDGETSRCNUM50_32 _IOWR('R', 102, rndstat50_32_t) 148 #define RNDGETSRCNAME50_32 _IOWR('R', 103, rndstat_name50_32_t) 149 #endif /* COMPAT_NETBSD32 */ 150 151 #endif /* !_COMPAT_SYS_RND_H_ */ 152
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