usr.sbin/installboot/arch/hp700.c

   1 /*      $NetBSD: hp700.c,v 1.3 2008/02/02 16:46:15 itohy Exp $  */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Luke Mewburn of Wasabi Systems.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 #if !defined(__lint)
  38 __RCSID("$NetBSD: hp700.c,v 1.3 2008/02/02 16:46:15 itohy Exp $");
  39 #endif  /* !__lint */
  40
  41 /* We need the target disklabel.h, not the hosts one..... */
  42 #ifdef HAVE_NBTOOL_CONFIG_H
  43 #include "nbtool_config.h"
  44 #include <nbinclude/sys/disklabel.h>
  45 #else
  46 #include <sys/disklabel.h>
  47 #endif
  48 #include <sys/param.h>
  49 #include <sys/stat.h>
  50
  51 #include <assert.h>
  52 #include <err.h>
  53 #include <stddef.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <string.h>
  57 #include <unistd.h>
  58
  59 #include "installboot.h"
  60
  61 #define HP700_LABELOFFSET       512
  62 #define HP700_LABELSIZE         404 /* reserve 16 partitions */
  63 #define HP700_BOOT_BLOCK_SIZE   8192
  64
  65 static int hp700_clearboot(ib_params *);
  66 static int hp700_setboot(ib_params *);
  67
  68 struct ib_mach ib_mach_hp700 =
  69         { "hp700", hp700_setboot, hp700_clearboot, no_editboot, 0};
  70
  71 static int
  72 hp700_clearboot(ib_params *params)
  73 {
  74         char            bb[HP700_BOOT_BLOCK_SIZE];
  75         int             retval, eol;
  76         ssize_t         rv;
  77
  78         assert(params != NULL);
  79         assert(params->fsfd != -1);
  80         assert(params->filesystem != NULL);
  81
  82         retval = 0;
  83
  84         /* read disklabel on the target disk */
  85         rv = pread(params->fsfd, bb, sizeof bb, 0);
  86         if (rv == -1) {
  87                 warn("Reading `%s'", params->filesystem);
  88                 goto done;
  89         } else if (rv != sizeof bb) {
  90                 warnx("Reading `%s': short read", params->filesystem);
  91                 goto done;
  92         }
  93
  94         /* clear header */
  95         memset(bb, 0, HP700_LABELOFFSET);
  96         eol = HP700_LABELOFFSET + HP700_LABELSIZE;
  97         memset(&bb[eol], 0, sizeof bb - eol);
  98
  99         if (params->flags & IB_VERBOSE) {
 100                 printf("%slearing bootstrap\n",
 101                     (params->flags & IB_NOWRITE) ? "Not c" : "C");
 102         }
 103         if (params->flags & IB_NOWRITE) {
 104                 retval = 1;
 105                 goto done;
 106         }
 107
 108         rv = pwrite(params->fsfd, bb, sizeof bb, 0);
 109         if (rv == -1) {
 110                 warn("Writing `%s'", params->filesystem);
 111                 goto done;
 112         } else if (rv != HP700_BOOT_BLOCK_SIZE) {
 113                 warnx("Writing `%s': short write", params->filesystem);
 114                 goto done;
 115         } else
 116                 retval = 1;
 117
 118  done:
 119         return (retval);
 120 }
 121
 122 static int
 123 hp700_setboot(ib_params *params)
 124 {
 125         struct stat     bootstrapsb;
 126         char            bb[HP700_BOOT_BLOCK_SIZE];
 127         struct {
 128                 char    l_off[HP700_LABELOFFSET];
 129                 struct disklabel l;
 130                 char    l_pad[HP700_BOOT_BLOCK_SIZE
 131                             - HP700_LABELOFFSET - sizeof(struct disklabel)];
 132         } label;
 133         unsigned int    secsize, npart;
 134         int             retval;
 135         ssize_t         rv;
 136
 137         assert(params != NULL);
 138         assert(params->fsfd != -1);
 139         assert(params->filesystem != NULL);
 140         assert(params->s1fd != -1);
 141         assert(params->stage1 != NULL);
 142
 143         retval = 0;
 144
 145         /* read disklabel on the target disk */
 146         rv = pread(params->fsfd, &label, HP700_BOOT_BLOCK_SIZE, 0);
 147         if (rv == -1) {
 148                 warn("Reading `%s'", params->filesystem);
 149                 goto done;
 150         } else if (rv != HP700_BOOT_BLOCK_SIZE) {
 151                 warnx("Reading `%s': short read", params->filesystem);
 152                 goto done;
 153         }
 154
 155         if (fstat(params->s1fd, &bootstrapsb) == -1) {
 156                 warn("Examining `%s'", params->stage1);
 157                 goto done;
 158         }
 159         if (!S_ISREG(bootstrapsb.st_mode)) {
 160                 warnx("`%s' must be a regular file", params->stage1);
 161                 goto done;
 162         }
 163
 164         /* check if valid disklabel exists */
 165         secsize = be32toh(label.l.d_secsize);
 166         npart = be16toh(label.l.d_npartitions);
 167         if (label.l.d_magic != htobe32(DISKMAGIC) ||
 168             label.l.d_magic2 != htobe32(DISKMAGIC) ||
 169             secsize == 0 || secsize & (secsize - 1) ||
 170             npart > MAXMAXPARTITIONS) {
 171                 warnx("No disklabel in `%s'", params->filesystem);
 172
 173         /* then check if boot partition exists */
 174         } else if (npart < 1 || label.l.d_partitions[0].p_size == 0) {
 175                 warnx("Partition `a' doesn't exist in %s", params->filesystem);
 176
 177         /* check if the boot partition is below 2GB */
 178         } else if (be32toh(label.l.d_partitions[0].p_offset) +
 179             be32toh(label.l.d_partitions[0].p_size) >
 180             ((unsigned)2*1024*1024*1024) / secsize) {
 181                 warnx("WARNING: Partition `a' of `%s' exceeds 2GB boundary.",
 182                     params->filesystem);
 183                 warnx("WARNING: It won't boot since hp700 PDC can handle only 2GB.");
 184         }
 185
 186         /* read boot loader */
 187         memset(&bb, 0, sizeof bb);
 188         rv = read(params->s1fd, &bb, sizeof bb);
 189         if (rv == -1) {
 190                 warn("Reading `%s'", params->stage1);
 191                 goto done;
 192         }
 193         /* then, overwrite disklabel */
 194         memcpy(&bb[HP700_LABELOFFSET], &label.l, HP700_LABELSIZE);
 195
 196         if (params->flags & IB_VERBOSE) {
 197                 printf("Bootstrap start sector: %#x\n", 0);
 198                 printf("Bootstrap byte count:   %#zx\n", rv);
 199                 printf("%sriting bootstrap\n",
 200                     (params->flags & IB_NOWRITE) ? "Not w" : "W");
 201         }
 202         if (params->flags & IB_NOWRITE) {
 203                 retval = 1;
 204                 goto done;
 205         }
 206
 207         /* write boot loader and disklabel into the target disk */
 208         rv = pwrite(params->fsfd, &bb, HP700_BOOT_BLOCK_SIZE, 0);
 209         if (rv == -1) {
 210                 warn("Writing `%s'", params->filesystem);
 211                 goto done;
 212         } else if (rv != HP700_BOOT_BLOCK_SIZE) {
 213                 warnx("Writing `%s': short write", params->filesystem);
 214                 goto done;
 215         } else
 216                 retval = 1;
 217
 218  done:
 219         return (retval);
 220 }