1 /* $NetBSD: partutil.c,v 1.12 2013/04/13 22:08:57 jakllsch 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 1.12 2013/04/13 22:08:57 jakllsch 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 int 93 getdiskinfo(const char *s, int fd, const char *dt, struct disk_geom *geo, 94 struct dkwedge_info *dkw) 95 { 96 struct disklabel lab; 97 struct disklabel *lp = &lab; 98 prop_dictionary_t disk_dict, geom_dict; 99 struct stat sb; 100 const struct partition *pp; 101 int ptn; 102 103 if (dt) { 104 lp = getdiskbyname(dt); 105 if (lp == NULL) 106 errx(1, "unknown disk type `%s'", dt); 107 } 108 109 /* Get disk description dictionary */ 110 if (prop_dictionary_recv_ioctl(fd, DIOCGDISKINFO, &disk_dict)) { 111 /* 112 * Ask for disklabel if DIOCGDISKINFO failed. This is 113 * compatibility call and can be removed when all devices 114 * will support DIOCGDISKINFO. 115 * cgd, ccd pseudo disk drives doesn't support DIOCGDDISKINFO 116 */ 117 if (ioctl(fd, DIOCGDINFO, lp) == -1) { 118 warn("DIOCGDINFO on %s failed", s); 119 return -1; 120 } 121 label2geom(geo, lp); 122 } else { 123 geom_dict = prop_dictionary_get(disk_dict, "geometry"); 124 dict2geom(geo, geom_dict); 125 } 126 127 /* Get info about partition/wedge */ 128 if (ioctl(fd, DIOCGWEDGEINFO, dkw) != -1) { 129 /* DIOCGWEDGEINFO didn't fail, we're done */ 130 return 0; 131 } 132 133 if (ioctl(fd, DIOCGDINFO, lp) == -1) { 134 err(1, "Please implement DIOCGWEDGEINFO or " 135 "DIOCGDINFO for disk device %s", s); 136 } 137 138 /* DIOCGDINFO didn't fail */ 139 140 (void)memset(dkw, 0, sizeof(*dkw)); 141 142 if (stat(s, &sb) == -1) 143 return 0; 144 145 ptn = strchr(s, '\0')[-1] - 'a'; 146 if ((unsigned)ptn >= lp->d_npartitions || 147 (devminor_t)ptn != DISKPART(sb.st_rdev)) 148 return 0; 149 150 pp = &lp->d_partitions[ptn]; 151 if (ptn != getrawpartition()) { 152 dkw->dkw_offset = pp->p_offset; 153 dkw->dkw_size = pp->p_size; 154 } else { 155 dkw->dkw_offset = 0; 156 dkw->dkw_size = geo->dg_secperunit; 157 } 158 dkw->dkw_parent[0] = '*'; 159 strlcpy(dkw->dkw_ptype, getfstypename(pp->p_fstype), 160 sizeof(dkw->dkw_ptype)); 161 162 return 0; 163 } 164