| 1 | /* $NetBSD: rnd.h,v 1.4 2015/04/14 12:19:57 riastradh 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@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 | #endif |
| 141 | |
| 142 | #define RNDGETSRCNUM50 _IOWR('R', 102, rndstat50_t) |
| 143 | #define RNDGETSRCNAME50 _IOWR('R', 103, rndstat_name50_t) |
| 144 | |
| 145 | #ifdef COMPAT_NETBSD32 |
| 146 | #define RNDGETSRCNUM50_32 _IOWR('R', 102, rndstat50_32_t) |
| 147 | #define RNDGETSRCNAME50_32 _IOWR('R', 103, rndstat_name50_32_t) |
| 148 | #endif /* COMPAT_NETBSD32 */ |
| 149 | |
| 150 | #endif /* !_COMPAT_SYS_RND_H_ */ |
| 151 | |