1 /* $NetBSD: partutil.c,v 1.10 2010/03/06 00:30:54 christos 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 1.10 2010/03/06 00:30:54 christos 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 (void)memset(geo, 0, sizeof(struct disk_geom)); 80 prop_dictionary_get_int64(dict, "sectors-per-unit", 81 &geo->dg_secperunit); 82 prop_dictionary_get_uint32(dict, "sector-size", &geo->dg_secsize); 83 prop_dictionary_get_uint32(dict, "sectors-per-track", 84 &geo->dg_nsectors); 85 prop_dictionary_get_uint32(dict, "tracks-per-cylinder", 86 &geo->dg_ntracks); 87 prop_dictionary_get_uint32(dict, "cylinders-per-unit", 88 &geo->dg_ncylinders); 89 } 90 91 92 static void 93 part2wedge(struct dkwedge_info *dkw, const struct disklabel *lp, const char *s) 94 { 95 struct stat sb; 96 const struct partition *pp; 97 int ptn; 98 99 (void)memset(dkw, 0, sizeof(*dkw)); 100 if (stat(s, &sb) == -1) 101 return; 102 103 ptn = strchr(s, '\0')[-1] - 'a'; 104 if ((unsigned)ptn >= lp->d_npartitions || 105 (devminor_t)ptn != DISKPART(sb.st_rdev)) 106 return; 107 108 pp = &lp->d_partitions[ptn]; 109 dkw->dkw_offset = pp->p_offset; 110 dkw->dkw_size = pp->p_size; 111 dkw->dkw_parent[0] = '*'; 112 switch (pp->p_fstype) { 113 default: 114 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNKNOWN); 115 break; 116 case FS_UNUSED: 117 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNUSED); 118 break; 119 case FS_SWAP: 120 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_SWAP); 121 break; 122 case FS_BSDFFS: 123 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FFS); 124 break; 125 case FS_BSDLFS: 126 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_LFS); 127 break; 128 case FS_EX2FS: 129 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_EXT2FS); 130 break; 131 case FS_ISO9660: 132 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_ISO9660); 133 break; 134 case FS_ADOS: 135 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_AMIGADOS); 136 break; 137 case FS_HFS: 138 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEHFS); 139 break; 140 case FS_MSDOS: 141 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FAT); 142 break; 143 case FS_FILECORE: 144 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FILECORE); 145 break; 146 case FS_APPLEUFS: 147 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEUFS); 148 break; 149 case FS_NTFS: 150 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_NTFS); 151 break; 152 } 153 } 154 155 int 156 getdiskinfo(const char *s, int fd, const char *dt, struct disk_geom *geo, 157 struct dkwedge_info *dkw) 158 { 159 struct disklabel lab; 160 struct disklabel *lp = &lab; 161 prop_dictionary_t disk_dict, geom_dict; 162 163 if (dt) { 164 lp = getdiskbyname(dt); 165 if (lp == NULL) 166 errx(1, "unknown disk type `%s'", dt); 167 } 168 169 /* Get disk description dictionary */ 170 if (prop_dictionary_recv_ioctl(fd, DIOCGDISKINFO, &disk_dict)) { 171 /* 172 * Ask for disklabel if DIOCGDISKINFO failed. This is 173 * compatibility call and can be removed when all devices 174 * will support DIOCGDISKINFO. 175 * cgd, ccd pseudo disk drives doesn't support DIOCGDDISKINFO 176 */ 177 if (ioctl(fd, DIOCGDINFO, lp) == -1) { 178 warn("DIOCGDINFO on %s failed", s); 179 return -1; 180 } 181 label2geom(geo, lp); 182 } else { 183 geom_dict = prop_dictionary_get(disk_dict, "geometry"); 184 dict2geom(geo, geom_dict); 185 } 186 187 /* Get info about partition/wedge */ 188 if (ioctl(fd, DIOCGWEDGEINFO, dkw) == -1) { 189 if (ioctl(fd, DIOCGDINFO, lp) == -1) 190 err(1, "Please implement DIOCGWEDGEINFO or " 191 "DIOCGDINFO for disk device %s", s); 192 193 part2wedge(dkw, lp, s); 194 } 195 196 return 0; 197 } 198