sbin/fsck/partutil.c

   1 /*      $NetBSD: partutil.c,v 1.8 2009/06/14 21:06:18 haad Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2006 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   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 #include <sys/cdefs.h>
  33 __RCSID("$NetBSD: partutil.c,v 1.8 2009/06/14 21:06:18 haad Exp $");
  34
  35 #include <sys/types.h>
  36 #include <sys/disklabel.h>
  37 #include <sys/disk.h>
  38 #include <sys/ioctl.h>
  39 #include <sys/stat.h>
  40
  41
  42 #include <disktab.h>
  43 #include <err.h>
  44 #include <errno.h>
  45 #include <fcntl.h>
  46 #include <util.h>
  47 #include <unistd.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50
  51 #include <prop/proplib.h>
  52
  53 #include "partutil.h"
  54
  55 /*
  56  * Convert disklabel geometry info to disk_geom.
  57  */
  58 static void
  59 label2geom(struct disk_geom *geo, const struct disklabel *lp)
  60 {
  61         geo->dg_secperunit = lp->d_secperunit;
  62         geo->dg_secsize = lp->d_secsize;
  63         geo->dg_nsectors = lp->d_nsectors;
  64         geo->dg_ntracks = lp->d_ntracks;
  65         geo->dg_ncylinders = lp->d_ncylinders;
  66         geo->dg_secpercyl = lp->d_secpercyl;
  67         geo->dg_pcylinders = lp->d_ncylinders;
  68         geo->dg_sparespertrack = lp->d_sparespertrack;
  69         geo->dg_sparespercyl = lp->d_sparespercyl;
  70         geo->dg_acylinders = lp->d_acylinders;
  71 }
  72
  73 /*
  74  * Set what we need to know about disk geometry.
  75  */
  76 static void
  77 dict2geom(struct disk_geom *geo, prop_dictionary_t dict)
  78 {
  79         memset(geo, 0, sizeof(struct disk_geom));
  80         prop_dictionary_get_int64(dict, "sectors-per-unit", &geo->dg_secperunit);
  81         prop_dictionary_get_uint32(dict, "sector-size", &geo->dg_secsize);
  82         prop_dictionary_get_uint32(dict, "sectors-per-track", &geo->dg_nsectors);
  83         prop_dictionary_get_uint32(dict, "tracks-per-cylinder", &geo->dg_ntracks);
  84         prop_dictionary_get_uint32(dict, "cylinders-per-unit", &geo->dg_ncylinders);
  85 }
  86
  87
  88 static void
  89 part2wedge(struct dkwedge_info *dkw, const struct disklabel *lp, const char *s)
  90 {
  91         struct stat sb;
  92         const struct partition *pp;
  93         int ptn;
  94
  95         (void)memset(dkw, 0, sizeof(*dkw));
  96         if (stat(s, &sb) == -1)
  97                 return;
  98
  99         ptn = strchr(s, '\0')[-1] - 'a';
 100         if ((unsigned)ptn >= lp->d_npartitions ||
 101             (devminor_t)ptn != DISKPART(sb.st_rdev))
 102                 return;
 103
 104         pp = &lp->d_partitions[ptn];
 105         dkw->dkw_offset = pp->p_offset;
 106         dkw->dkw_size = pp->p_size;
 107         dkw->dkw_parent[0] = '*';
 108         switch (pp->p_fstype) {
 109         default:
 110                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNKNOWN);
 111                 break;
 112         case FS_UNUSED:
 113                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNUSED);
 114                 break;
 115         case FS_SWAP:
 116                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_SWAP);
 117                 break;
 118         case FS_BSDFFS:
 119                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FFS);
 120                 break;
 121         case FS_BSDLFS:
 122                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_LFS);
 123                 break;
 124         case FS_EX2FS:
 125                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_EXT2FS);
 126                 break;
 127         case FS_ISO9660:
 128                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_ISO9660);
 129                 break;
 130         case FS_ADOS:
 131                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_AMIGADOS);
 132                 break;
 133         case FS_HFS:
 134                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEHFS);
 135                 break;
 136         case FS_MSDOS:
 137                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FAT);
 138                 break;
 139         case FS_FILECORE:
 140                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FILECORE);
 141                 break;
 142         case FS_APPLEUFS:
 143                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEUFS);
 144                 break;
 145         case FS_NTFS:
 146                 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_NTFS);
 147                 break;
 148         }
 149 }
 150
 151 int
 152 getdiskinfo(const char *s, int fd, const char *dt, struct disk_geom *geo,
 153     struct dkwedge_info *dkw)
 154 {
 155         struct disklabel lab;
 156         struct disklabel *lp = &lab;
 157         prop_dictionary_t disk_dict, geom_dict;
 158
 159         if (dt) {
 160                 lp = getdiskbyname(dt);
 161                 if (lp == NULL)
 162                         errx(1, "%s: unknown disk type", dt);
 163         }
 164
 165         /* Get disk description dictionary */
 166         if (prop_dictionary_recv_ioctl(fd, DIOCGDISKINFO, &disk_dict)) {
 167                 /*
 168                  * Ask for disklabel if DIOCGDISKINFO failed. This is
 169                  * compatibility call and can be removed when all devices
 170                  * will support DIOCGDISKINFO.
 171                  * cgd, ccd pseudo disk drives doesn't support DIOCGDDISKINFO
 172                  */
 173                 if (ioctl(fd, DIOCGDINFO, lp) == -1) {
 174                         printf("DIOCGDINFO on %s failed\n", s);
 175                         return -1;
 176                 }
 177                 label2geom(geo, lp);
 178         } else {
 179                 geom_dict = prop_dictionary_get(disk_dict, "geometry");
 180                 dict2geom(geo, geom_dict);
 181         }
 182
 183         /* Get info about partition/wedge */
 184         if (ioctl(fd, DIOCGWEDGEINFO, dkw) == -1) {
 185                 if (ioctl(fd, DIOCGDINFO, lp) == -1)
 186                         errx(errno, "Please implement DIOCGWEDGEINFO or "
 187                             "DIOCGDINFO for disk device %s\n", s);
 188
 189                 part2wedge(dkw, lp, s);
 190         }
 191
 192         return 0;
 193 }