geom_sunlabel.c revision 105551
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_sunlabel.c 105551 2002-10-20 20:28:24Z 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 <geom/geom.h> 56#include <geom/geom_slice.h> 57#include <machine/endian.h> 58 59#define SUNLABEL_CLASS_NAME "SUN" 60 61struct g_sunlabel_softc { 62 int foo; 63}; 64 65static int 66g_sunlabel_start(struct bio *bp) 67{ 68 struct g_geom *gp; 69 struct g_sunlabel_softc *ms; 70 struct g_slicer *gsp; 71 72 gp = bp->bio_to->geom; 73 gsp = gp->softc; 74 ms = gsp->softc; 75 return (0); 76} 77 78static void 79g_sunlabel_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp) 80{ 81 82 g_slice_dumpconf(sb, indent, gp, cp, pp); 83} 84 85static struct g_geom * 86g_sunlabel_taste(struct g_class *mp, struct g_provider *pp, int flags) 87{ 88 struct g_geom *gp; 89 struct g_consumer *cp; 90 struct g_provider *pp2; 91 int error, i, npart; 92 u_char *buf; 93 struct g_sunlabel_softc *ms; 94 u_int sectorsize, u, v, csize; 95 off_t mediasize; 96 struct g_slicer *gsp; 97 98 g_trace(G_T_TOPOLOGY, "g_sunlabel_taste(%s,%s)", mp->name, pp->name); 99 g_topology_assert(); 100 if (flags == G_TF_NORMAL && 101 !strcmp(pp->geom->class->name, SUNLABEL_CLASS_NAME)) 102 return (NULL); 103 gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, g_sunlabel_start); 104 if (gp == NULL) 105 return (NULL); 106 gsp = gp->softc; 107 g_topology_unlock(); 108 gp->dumpconf = g_sunlabel_dumpconf; 109 npart = 0; 110 while (1) { /* a trick to allow us to use break */ 111 if (gp->rank != 2 && flags == G_TF_NORMAL) 112 break; 113 sectorsize = cp->provider->sectorsize; 114 if (sectorsize < 512) 115 break; 116 gsp->frontstuff = 16 * sectorsize; 117 mediasize = cp->provider->mediasize; 118 buf = g_read_data(cp, 0, sectorsize, &error); 119 if (buf == NULL || error != 0) 120 break; 121 122 /* The second last short is a magic number */ 123 if (g_dec_be2(buf + 508) != 0xdabe) 124 break; 125 /* The shortword parity of the entire thing must be even */ 126 u = 0; 127 for (i = 0; i < 512; i += 2) 128 u ^= g_dec_be2(buf + i); 129 if (u != 0) 130 break; 131 if (bootverbose) { 132 g_hexdump(buf, 128); 133 for (i = 0; i < 8; i++) { 134 printf("part %d %u %u\n", i, 135 g_dec_be4(buf + 444 + i * 8), 136 g_dec_be4(buf + 448 + i * 8)); 137 } 138 printf("v_version = %d\n", g_dec_be4(buf + 128)); 139 printf("v_nparts = %d\n", g_dec_be2(buf + 140)); 140 for (i = 0; i < 8; i++) { 141 printf("v_part[%d] = %d %d\n", 142 i, g_dec_be2(buf + 142 + i * 4), 143 g_dec_be2(buf + 144 + i * 4)); 144 } 145 printf("v_sanity %x\n", g_dec_be4(buf + 186)); 146 printf("v_version = %d\n", g_dec_be4(buf + 128)); 147 printf("v_rpm %d\n", g_dec_be2(buf + 420)); 148 printf("v_totalcyl %d\n", g_dec_be2(buf + 422)); 149 printf("v_cyl %d\n", g_dec_be2(buf + 432)); 150 printf("v_alt %d\n", g_dec_be2(buf + 434)); 151 printf("v_head %d\n", g_dec_be2(buf + 436)); 152 printf("v_sec %d\n", g_dec_be2(buf + 438)); 153 } 154 155 csize = g_dec_be2(buf + 436) * g_dec_be2(buf + 438); 156 157 for (i = 0; i < 8; i++) { 158 v = g_dec_be4(buf + 444 + i * 8); 159 u = g_dec_be4(buf + 448 + i * 8); 160 if (u == 0) 161 continue; 162 npart++; 163 g_topology_lock(); 164 pp2 = g_slice_addslice(gp, i, 165 ((off_t)v * csize) << 9ULL, 166 ((off_t)u) << 9ULL, 167 sectorsize, 168 "%s%c", pp->name, 'a' + i); 169 g_topology_unlock(); 170 g_error_provider(pp2, 0); 171 } 172 break; 173 } 174 g_topology_lock(); 175 error = g_access_rel(cp, -1, 0, 0); 176 if (npart > 0) 177 return (gp); 178 g_std_spoiled(cp); 179 return (NULL); 180} 181 182static struct g_class g_sunlabel_class = { 183 SUNLABEL_CLASS_NAME, 184 g_sunlabel_taste, 185 NULL, 186 G_CLASS_INITIALIZER 187}; 188 189DECLARE_GEOM_CLASS(g_sunlabel_class, g_sunlabel); 190