gpt_uuid.c revision 1.6
1 /* $NetBSD: gpt_uuid.c,v 1.6 2014/10/03 00:51:31 jnemeth Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #if HAVE_NBTOOL_CONFIG_H 30 #include "nbtool_config.h" 31 #endif 32 33 #include <sys/cdefs.h> 34 #ifdef __RCSID 35 __RCSID("$NetBSD: gpt_uuid.c,v 1.6 2014/10/03 00:51:31 jnemeth Exp $"); 36 #endif 37 38 #include <stdio.h> 39 40 #include "map.h" 41 #include "gpt.h" 42 43 #if defined(HAVE_SYS_ENDIAN_H) || ! defined(HAVE_NBTOOL_CONFIG_H) 44 #include <sys/endian.h> 45 #endif 46 47 #if !defined(HAVE_NBTOOL_CONFIG_H) 48 #include <sys/types.h> 49 #include <sys/uuid.h> 50 #endif 51 52 const gpt_uuid_t gpt_uuid_nil; 53 54 struct dce_uuid { 55 uint32_t time_low; 56 uint16_t time_mid; 57 uint16_t time_hi_and_version; 58 uint8_t clock_seq_hi_and_reserved; 59 uint8_t clock_seq_low; 60 uint8_t node[6]; 61 }; 62 63 static const struct { 64 struct dce_uuid u; 65 const char *n; 66 const char *d; 67 } gpt_nv[] = { 68 { GPT_ENT_TYPE_APPLE_HFS, "apple", "Apple HFS" }, 69 { GPT_ENT_TYPE_BIOS, "bios", "BIOS Boot" }, 70 { GPT_ENT_TYPE_EFI, "efi", "EFI System" }, 71 { GPT_ENT_TYPE_FREEBSD, "fbsd-legacy", "FreeBSD legacy" }, 72 { GPT_ENT_TYPE_FREEBSD_SWAP, "fbsd-swap", "FreeBSD swap" }, 73 { GPT_ENT_TYPE_FREEBSD_UFS, "fbsd-ufs", "FreeBSD UFS/UFS2" }, 74 { GPT_ENT_TYPE_FREEBSD_VINUM, "fbsd-vinum", "FreeBSD vinum" }, 75 { GPT_ENT_TYPE_FREEBSD_ZFS, "fbsd-zfs", "FreeBSD ZFS" }, 76 { GPT_ENT_TYPE_LINUX_DATA, "linux-data", "Linux data" }, 77 { GPT_ENT_TYPE_LINUX_SWAP, "linux-swap", "Linux swap" }, 78 { GPT_ENT_TYPE_MS_BASIC_DATA, "windows", "Windows basic data" }, 79 { GPT_ENT_TYPE_MS_RESERVED, "windows-reserved", "Windows reserved" }, 80 { GPT_ENT_TYPE_NETBSD_CCD, "ccd", "NetBSD ccd component" }, 81 { GPT_ENT_TYPE_NETBSD_CGD, "cgd", "NetBSD Cryptographic Disk" }, 82 { GPT_ENT_TYPE_NETBSD_FFS, "ffs", "NetBSD FFSv1/FFSv2" }, 83 { GPT_ENT_TYPE_NETBSD_LFS, "lfs", "NetBSD LFS" }, 84 { GPT_ENT_TYPE_NETBSD_RAIDFRAME, "raid", 85 "NetBSD RAIDFrame component" }, 86 { GPT_ENT_TYPE_NETBSD_SWAP, "swap", "NetBSD swap" }, 87 }; 88 89 static void 90 gpt_uuid_to_dce(const gpt_uuid_t buf, struct dce_uuid *uuid) 91 { 92 const uint8_t *p = buf; 93 size_t i; 94 95 uuid->time_low = le32dec(p); 96 uuid->time_mid = le16dec(p + 4); 97 uuid->time_hi_and_version = le16dec(p + 6); 98 uuid->clock_seq_hi_and_reserved = p[8]; 99 uuid->clock_seq_low = p[9]; 100 for (i = 0; i < sizeof(uuid->node); i++) 101 uuid->node[i] = p[10 + i]; 102 } 103 104 static void 105 gpt_dce_to_uuid(const struct dce_uuid *uuid, uint8_t *buf) 106 { 107 uint8_t *p = buf; 108 size_t i; 109 110 le32enc(p, uuid->time_low); 111 le16enc(p + 4, uuid->time_mid); 112 le16enc(p + 6, uuid->time_hi_and_version); 113 p[8] = uuid->clock_seq_hi_and_reserved; 114 p[9] = uuid->clock_seq_low; 115 for (i = 0; i < sizeof(uuid->node); i++) 116 p[10 + i] = uuid->node[i]; 117 } 118 119 static int 120 gpt_uuid_numeric(char *buf, size_t bufsiz, const struct dce_uuid *u) 121 { 122 return snprintf(buf, bufsiz, 123 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 124 u->time_low, u->time_mid, u->time_hi_and_version, 125 u->clock_seq_hi_and_reserved, u->clock_seq_low, u->node[0], 126 u->node[1], u->node[2], u->node[3], u->node[4], u->node[5]); 127 } 128 129 130 static int 131 gpt_uuid_symbolic(char *buf, size_t bufsiz, const struct dce_uuid *u) 132 { 133 size_t i; 134 135 for (i = 0; i < __arraycount(gpt_nv); i++) 136 if (memcmp(&gpt_nv[i].u, u, sizeof(*u)) == 0) 137 return strlcpy(buf, gpt_nv[i].n, bufsiz); 138 return -1; 139 } 140 141 static int 142 gpt_uuid_descriptive(char *buf, size_t bufsiz, const struct dce_uuid *u) 143 { 144 size_t i; 145 146 for (i = 0; i < __arraycount(gpt_nv); i++) 147 if (memcmp(&gpt_nv[i].u, u, sizeof(*u)) == 0) 148 return strlcpy(buf, gpt_nv[i].d, bufsiz); 149 return -1; 150 } 151 152 int 153 gpt_uuid_snprintf(char *buf, size_t bufsiz, const char *fmt, 154 const gpt_uuid_t uu) 155 { 156 struct dce_uuid u; 157 gpt_uuid_to_dce(uu, &u); 158 159 if (fmt[1] == 's') { 160 int r; 161 if ((r = gpt_uuid_symbolic(buf, bufsiz, &u)) != -1) 162 return r; 163 } 164 if (fmt[1] == 'l') { 165 int r; 166 if ((r = gpt_uuid_descriptive(buf, bufsiz, &u)) != -1) 167 return r; 168 } 169 return gpt_uuid_numeric(buf, bufsiz, &u); 170 } 171 172 static int 173 gpt_uuid_parse_numeric(const char *s, struct dce_uuid *u) 174 { 175 int n; 176 177 if (s == NULL || *s == '\0') { 178 memset(u, 0, sizeof(*u)); 179 return 0; 180 } 181 182 n = sscanf(s, 183 "%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx", 184 &u->time_low, &u->time_mid, &u->time_hi_and_version, 185 &u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0], 186 &u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]); 187 188 /* Make sure we have all conversions. */ 189 if (n != 11) 190 return -1; 191 192 /* We have a successful scan. Check semantics... */ 193 n = u->clock_seq_hi_and_reserved; 194 if ((n & 0x80) != 0x00 && /* variant 0? */ 195 (n & 0xc0) != 0x80 && /* variant 1? */ 196 (n & 0xe0) != 0xc0) /* variant 2? */ 197 return -1; 198 return 0; 199 } 200 201 static int 202 gpt_uuid_parse_symbolic(const char *s, struct dce_uuid *u) 203 { 204 size_t i; 205 206 for (i = 0; i < __arraycount(gpt_nv); i++) 207 if (strcmp(gpt_nv[i].n, s) == 0) { 208 *u = gpt_nv[i].u; 209 return 0; 210 } 211 return -1; 212 } 213 214 int 215 gpt_uuid_parse(const char *s, gpt_uuid_t uuid) 216 { 217 struct dce_uuid u; 218 219 if (gpt_uuid_parse_numeric(s, &u) != -1) { 220 gpt_dce_to_uuid(&u, uuid); 221 return 0; 222 } 223 224 if (gpt_uuid_parse_symbolic(s, &u) == -1) 225 return -1; 226 227 gpt_dce_to_uuid(&u, uuid); 228 return 0; 229 } 230 231 void 232 gpt_uuid_create(gpt_type_t t, gpt_uuid_t u, uint16_t *b, size_t s) 233 { 234 gpt_dce_to_uuid(&gpt_nv[t].u, u); 235 if (b) 236 utf8_to_utf16((const uint8_t *)gpt_nv[t].d, b, s / sizeof(*b)); 237 } 238 239 #if !defined(HAVE_NBTOOL_CONFIG_H) 240 void 241 gpt_uuid_create_new(gpt_uuid_t t) 242 { 243 struct uuid u; 244 245 uuidgen(&u, 1); 246 gpt_dce_to_uuid((struct dce_uuid *)&u, t); 247 } 248 #endif 249
Indexes created Fri Sep 26 08:10:20 GMT 2025