geom_pc98.c revision 98066
1/*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9 * DARPA CHATS research program. 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 * 3. The names of the authors may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $FreeBSD: head/sys/geom/geom_pc98.c 98066 2002-06-09 10:57:34Z phk $ 36 */ 37 38 39#include <sys/param.h> 40#ifndef _KERNEL 41#include <stdio.h> 42#include <string.h> 43#include <stdlib.h> 44#include <signal.h> 45#include <err.h> 46#else 47#include <sys/systm.h> 48#include <sys/kernel.h> 49#include <sys/conf.h> 50#include <sys/bio.h> 51#include <sys/malloc.h> 52#include <sys/lock.h> 53#include <sys/mutex.h> 54#endif 55#include <sys/errno.h> 56#include <geom/geom.h> 57#include <geom/geom_slice.h> 58#include <machine/endian.h> 59 60#define PC98_CLASS_NAME "PC98" 61 62struct g_pc98_softc { 63 int foo; 64}; 65 66static int 67g_pc98_start(struct bio *bp) 68{ 69 struct g_geom *gp; 70 struct g_pc98_softc *ms; 71 struct g_slicer *gsp; 72 73 gp = bp->bio_to->geom; 74 gsp = gp->softc; 75 ms = gsp->softc; 76 return (0); 77} 78 79static void 80g_pc98_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp) 81{ 82 83 g_slice_dumpconf(sb, indent, gp, cp, pp); 84} 85 86static struct g_geom * 87g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags) 88{ 89 struct g_geom *gp; 90 struct g_consumer *cp; 91 struct g_provider *pp2; 92 int error, i, npart; 93 u_char *buf; 94 struct g_pc98_softc *ms; 95 u_int sectorsize, u, v; 96 u_int fwsect, fwhead; 97 off_t mediasize, start, length; 98 struct g_slicer *gsp; 99 100 g_trace(G_T_TOPOLOGY, "g_pc98_taste(%s,%s)", mp->name, pp->name); 101 g_topology_assert(); 102 if (flags == G_TF_NORMAL && 103 !strcmp(pp->geom->class->name, PC98_CLASS_NAME)) 104 return (NULL); 105 gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, g_pc98_start); 106 if (gp == NULL) 107 return (NULL); 108 gsp = gp->softc; 109 g_topology_unlock(); 110 gp->dumpconf = g_pc98_dumpconf; 111 npart = 0; 112 while (1) { /* a trick to allow us to use break */ 113 if (gp->rank != 2 && flags == G_TF_NORMAL) 114 break; 115 error = g_getattr("GEOM::sectorsize", cp, §orsize); 116 if (error) { 117 sectorsize = 512; 118 printf("g_pc98_taste: error %d Sectors are %d bytes\n", 119 error, sectorsize); 120 } 121 error = g_getattr("GEOM::mediasize", cp, &mediasize); 122 if (error) { 123 mediasize = 0; 124 printf("g_error %d Mediasize is %lld bytes\n", 125 error, (long long)mediasize); 126 } 127 error = g_getattr("GEOM::fwsectors", cp, &fwsect); 128 if (error || fwsect == 0) { 129 fwsect = 17; 130 printf("g_pc98_taste: error %d guessing %d sectors\n", 131 error, fwsect); 132 } 133 error = g_getattr("GEOM::fwheads", cp, &fwhead); 134 if (error || fwhead == 0) { 135 fwhead = 8; 136 printf("g_pc98_taste: error %d guessing %d heads\n", 137 error, fwhead); 138 } 139 gsp->frontstuff = fwsect * sectorsize; 140 buf = g_read_data(cp, 0, 141 sectorsize < 1024 ? 1024 : sectorsize, &error); 142 if (buf == NULL || error != 0) 143 break; 144 145 if (buf[0x1fe] != 0x55 || buf[0x1ff] != 0xaa) 146 break; 147 if (buf[4] != 'I' || buf[5] != 'P' || 148 buf[6] != 'L' || buf[7] != '1') 149 break; 150 151 152 for (i = 0; i < 16; i++) { 153 v = g_dec_le2(buf + 512 + 10 + i * 32); 154 u = g_dec_le2(buf + 512 + 14 + i * 32); 155 if (u == 0) 156 continue; 157 printf("Index: %d\n", i); 158 g_hexdump(buf+512 + i * 32, 32); 159 start = v * fwsect * fwhead * sectorsize; 160 length = (u - v) * fwsect * fwhead * sectorsize; 161 printf("c%d - c%d (%llx - %llx) = %s\n", 162 v, u, start, length, buf + 512 + 16 + i * 32); 163 npart++; 164 pp2 = g_slice_addslice(gp, i, 165 start, length, 166 "%ss%d", pp->name, 1 + i); 167 g_error_provider(pp2, 0); 168 } 169 break; 170 } 171 g_topology_lock(); 172 error = g_access_rel(cp, -1, 0, 0); 173 if (npart > 0) 174 return (gp); 175 g_std_spoiled(cp); 176 return (NULL); 177} 178 179static struct g_class g_pc98_class = { 180 PC98_CLASS_NAME, 181 g_pc98_taste, 182 NULL, 183 G_CLASS_INITIALIZER 184}; 185 186DECLARE_GEOM_CLASS(g_pc98_class, g_pc98); 187