geom_sunlabel.c revision 112552
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 112552 2003-03-24 19:30:15Z 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 <sys/errno.h> 46#include <err.h> 47#else 48#include <sys/systm.h> 49#include <sys/kernel.h> 50#include <sys/conf.h> 51#include <sys/bio.h> 52#include <sys/malloc.h> 53#include <sys/lock.h> 54#include <sys/mutex.h> 55#endif 56#include <geom/geom.h> 57#include <geom/geom_slice.h> 58#include <machine/endian.h> 59 60#define SUNLABEL_CLASS_NAME "SUN" 61 62struct g_sunlabel_softc { 63 int sectorsize; 64 int nheads; 65 int nsects; 66 int nalt; 67}; 68 69static int 70g_sunlabel_modify(struct g_geom *gp, struct g_sunlabel_softc *ms, u_char *sec0) 71{ 72 int i, error; 73 u_int u, v, csize; 74 75 /* The second last short is a magic number */ 76 if (g_dec_be2(sec0 + 508) != 0xdabe) 77 return (EBUSY); 78 79 /* The shortword parity of the entire thing must be even */ 80 u = 0; 81 for (i = 0; i < 512; i += 2) 82 u ^= g_dec_be2(sec0 + i); 83 if (u != 0) 84 return(EBUSY); 85 86 csize = g_dec_be2(sec0 + 436) * g_dec_be2(sec0 + 438); 87 88 for (i = 0; i < 8; i++) { 89 v = g_dec_be4(sec0 + 444 + i * 8); 90 u = g_dec_be4(sec0 + 448 + i * 8); 91 g_topology_lock(); 92 error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK, 93 ((off_t)v * csize) << 9ULL, 94 ((off_t)u) << 9ULL, 95 ms->sectorsize, 96 "%s%c", gp->name, 'a' + i); 97 g_topology_unlock(); 98 if (error) 99 return (error); 100 } 101 for (i = 0; i < 8; i++) { 102 v = g_dec_be4(sec0 + 444 + i * 8); 103 u = g_dec_be4(sec0 + 448 + i * 8); 104 g_topology_lock(); 105 g_slice_config(gp, i, G_SLICE_CONFIG_SET, 106 ((off_t)v * csize) << 9ULL, 107 ((off_t)u) << 9ULL, 108 ms->sectorsize, 109 "%s%c", gp->name, 'a' + i); 110 g_topology_unlock(); 111 } 112 ms->nalt = g_dec_be2(sec0 + 434); 113 ms->nheads = g_dec_be2(sec0 + 436); 114 ms->nsects = g_dec_be2(sec0 + 438); 115 116 return (0); 117} 118 119static int 120g_sunlabel_start(struct bio *bp) 121{ 122 struct g_geom *gp; 123 struct g_sunlabel_softc *ms; 124 struct g_slicer *gsp; 125 126 gp = bp->bio_to->geom; 127 gsp = gp->softc; 128 ms = gsp->softc; 129 return (0); 130} 131 132static void 133g_sunlabel_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp) 134{ 135 struct g_slicer *gsp; 136 struct g_sunlabel_softc *ms; 137 138 gsp = gp->softc; 139 ms = gsp->softc; 140 g_slice_dumpconf(sb, indent, gp, cp, pp); 141 if (indent == NULL) { 142 sbuf_printf(sb, " sc %u hd %u alt %u", 143 ms->nsects, ms->nheads, ms->nalt); 144 } 145} 146 147static struct g_geom * 148g_sunlabel_taste(struct g_class *mp, struct g_provider *pp, int flags) 149{ 150 struct g_geom *gp; 151 struct g_consumer *cp; 152 int error, i, npart; 153 u_char *buf; 154 struct g_sunlabel_softc *ms; 155 off_t mediasize; 156 struct g_slicer *gsp; 157 158 g_trace(G_T_TOPOLOGY, "g_sunlabel_taste(%s,%s)", mp->name, pp->name); 159 g_topology_assert(); 160 if (flags == G_TF_NORMAL && 161 !strcmp(pp->geom->class->name, SUNLABEL_CLASS_NAME)) 162 return (NULL); 163 gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, g_sunlabel_start); 164 if (gp == NULL) 165 return (NULL); 166 gsp = gp->softc; 167 g_topology_unlock(); 168 gp->dumpconf = g_sunlabel_dumpconf; 169 npart = 0; 170 do { /* a trick to allow us to use break */ 171 if (gp->rank != 2 && flags == G_TF_NORMAL) 172 break; 173 ms->sectorsize = cp->provider->sectorsize; 174 if (ms->sectorsize < 512) 175 break; 176 gsp->frontstuff = 16 * ms->sectorsize; 177 mediasize = cp->provider->mediasize; 178 buf = g_read_data(cp, 0, ms->sectorsize, &error); 179 if (buf == NULL || error != 0) 180 break; 181 182 if (bootverbose) { 183 g_hexdump(buf, 128); 184 for (i = 0; i < 8; i++) { 185 printf("part %d %u %u\n", i, 186 g_dec_be4(buf + 444 + i * 8), 187 g_dec_be4(buf + 448 + i * 8)); 188 } 189 printf("v_version = %d\n", g_dec_be4(buf + 128)); 190 printf("v_nparts = %d\n", g_dec_be2(buf + 140)); 191 for (i = 0; i < 8; i++) { 192 printf("v_part[%d] = %d %d\n", 193 i, g_dec_be2(buf + 142 + i * 4), 194 g_dec_be2(buf + 144 + i * 4)); 195 } 196 printf("v_sanity %x\n", g_dec_be4(buf + 186)); 197 printf("v_version = %d\n", g_dec_be4(buf + 128)); 198 printf("v_rpm %d\n", g_dec_be2(buf + 420)); 199 printf("v_totalcyl %d\n", g_dec_be2(buf + 422)); 200 printf("v_cyl %d\n", g_dec_be2(buf + 432)); 201 printf("v_alt %d\n", g_dec_be2(buf + 434)); 202 printf("v_head %d\n", g_dec_be2(buf + 436)); 203 printf("v_sec %d\n", g_dec_be2(buf + 438)); 204 } 205 206 g_sunlabel_modify(gp, ms, buf); 207 208 break; 209 } while (0); 210 g_topology_lock(); 211 g_access_rel(cp, -1, 0, 0); 212 if (LIST_EMPTY(&gp->provider)) { 213 g_std_spoiled(cp); 214 return (NULL); 215#ifdef notyet 216 } else { 217 g_slice_conf_hot(gp, 0, 0, ms->sectorsize); 218#endif 219 } 220 return (gp); 221} 222 223static struct g_class g_sunlabel_class = { 224 .name = SUNLABEL_CLASS_NAME, 225 .taste = g_sunlabel_taste, 226 G_CLASS_INITIALIZER 227}; 228 229DECLARE_GEOM_CLASS(g_sunlabel_class, g_sunlabel); 230