1 /*- 2 * Copyright (c) 2014 Juniper Networks, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/diskmbr.h> 32 #include <sys/endian.h> 33 #include <sys/errno.h> 34 #include <sys/gpt.h> 35 #include <stddef.h> 36 #include <stdint.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <uuid.h> 41 42 #include "mkimg.h" 43 #include "scheme.h" 44 45 #ifndef GPT_ENT_TYPE_FREEBSD_NANDFS 46 #define GPT_ENT_TYPE_FREEBSD_NANDFS \ 47 {0x74ba7dd9,0xa689,0x11e1,0xbd,0x04,{0x00,0xe0,0x81,0x28,0x6a,0xcf}} 48 #endif 49 50 static uuid_t gpt_uuid_efi = GPT_ENT_TYPE_EFI; 51 static uuid_t gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD; 52 static uuid_t gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT; 53 static uuid_t gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS; 54 static uuid_t gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; 55 static uuid_t gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; 56 static uuid_t gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; 57 static uuid_t gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; 58 static uuid_t gpt_uuid_mbr = GPT_ENT_TYPE_MBR; 59 60 static struct mkimg_alias gpt_aliases[] = { 61 { ALIAS_EFI, ALIAS_PTR2TYPE(&gpt_uuid_efi) }, 62 { ALIAS_FREEBSD, ALIAS_PTR2TYPE(&gpt_uuid_freebsd) }, 63 { ALIAS_FREEBSD_BOOT, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_boot) }, 64 { ALIAS_FREEBSD_NANDFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_nandfs) }, 65 { ALIAS_FREEBSD_SWAP, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_swap) }, 66 { ALIAS_FREEBSD_UFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_ufs) }, 67 { ALIAS_FREEBSD_VINUM, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_vinum) }, 68 { ALIAS_FREEBSD_ZFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_zfs) }, 69 { ALIAS_MBR, ALIAS_PTR2TYPE(&gpt_uuid_mbr) }, 70 { ALIAS_NONE, 0 } /* Keep last! */ 71 }; 72 73 /* CRC32 code derived from work by Gary S. Brown. */ 74 static const uint32_t crc32_tab[] = { 75 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 76 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 77 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 78 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 79 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 80 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 81 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 82 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 83 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 84 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 85 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 86 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 87 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 88 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 89 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 90 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 91 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 92 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 93 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 94 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 95 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 96 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 97 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 98 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 99 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 100 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 101 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 102 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 103 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 104 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 105 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 106 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 107 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 108 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 109 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 110 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 111 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 112 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 113 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 114 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 115 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 116 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 117 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d 118 }; 119 120 static uint32_t 121 crc32(const void *buf, size_t sz) 122 { 123 const uint8_t *p = (const uint8_t *)buf; 124 uint32_t crc = ~0U; 125 126 while (sz--) 127 crc = crc32_tab[(crc ^ *p++) & 0xff] ^ (crc >> 8); 128 return (crc ^ ~0U); 129 } 130 131 static void 132 gpt_uuid_enc(void *buf, const uuid_t *uuid) 133 { 134 uint8_t *p = buf; 135 int i; 136 137 le32enc(p, uuid->time_low); 138 le16enc(p + 4, uuid->time_mid); 139 le16enc(p + 6, uuid->time_hi_and_version); 140 p[8] = uuid->clock_seq_hi_and_reserved; 141 p[9] = uuid->clock_seq_low; 142 for (i = 0; i < _UUID_NODE_LEN; i++) 143 p[10 + i] = uuid->node[i]; 144 } 145 146 static u_int 147 gpt_tblsz(void) 148 { 149 u_int ents; 150 151 ents = secsz / sizeof(struct gpt_ent); 152 return ((nparts + ents - 1) / ents); 153 } 154 155 static u_int 156 gpt_metadata(u_int where) 157 { 158 u_int secs; 159 160 if (where != SCHEME_META_IMG_START && where != SCHEME_META_IMG_END) 161 return (0); 162 163 secs = gpt_tblsz(); 164 secs += (where == SCHEME_META_IMG_START) ? 2 : 1; 165 return (secs); 166 } 167 168 static int 169 gpt_write_pmbr(int fd, lba_t blks, void *bootcode) 170 { 171 u_char *pmbr; 172 uint32_t secs; 173 int error; 174 175 secs = (blks > UINT32_MAX) ? UINT32_MAX : (uint32_t)blks; 176 177 pmbr = malloc(secsz); 178 if (pmbr == NULL) 179 return (errno); 180 if (bootcode != NULL) { 181 memcpy(pmbr, bootcode, DOSPARTOFF); 182 memset(pmbr + DOSPARTOFF, 0, secsz - DOSPARTOFF); 183 } else 184 memset(pmbr, 0, secsz); 185 pmbr[DOSPARTOFF + 2] = 2; 186 pmbr[DOSPARTOFF + 4] = 0xee; 187 pmbr[DOSPARTOFF + 5] = 0xff; 188 pmbr[DOSPARTOFF + 6] = 0xff; 189 pmbr[DOSPARTOFF + 7] = 0xff; 190 le32enc(pmbr + DOSPARTOFF + 8, 1); 191 le32enc(pmbr + DOSPARTOFF + 12, secs); 192 le16enc(pmbr + DOSMAGICOFFSET, DOSMAGIC); 193 error = mkimg_write(fd, 0, pmbr, 1); 194 free(pmbr); 195 return (error); 196 } 197 198 static struct gpt_ent * 199 gpt_mktbl(u_int tblsz) 200 { 201 uuid_t uuid; 202 struct gpt_ent *tbl, *ent; 203 struct part *part; 204 int c, idx; 205 206 tbl = calloc(tblsz, secsz); 207 if (tbl == NULL) 208 return (NULL); 209 210 STAILQ_FOREACH(part, &partlist, link) { 211 ent = tbl + part->index; 212 gpt_uuid_enc(&ent->ent_type, ALIAS_TYPE2PTR(part->type)); 213 uuidgen(&uuid, 1); 214 gpt_uuid_enc(&ent->ent_uuid, &uuid); 215 le64enc(&ent->ent_lba_start, part->block); 216 le64enc(&ent->ent_lba_end, part->block + part->size - 1); 217 if (part->label != NULL) { 218 idx = 0; 219 while ((c = part->label[idx]) != '\0') { 220 le16enc(ent->ent_name + idx, c); 221 idx++; 222 } 223 } 224 } 225 return (tbl); 226 } 227 228 static int 229 gpt_write_hdr(int fd, struct gpt_hdr *hdr, uint64_t self, uint64_t alt, 230 uint64_t tbl) 231 { 232 uint32_t crc; 233 234 le64enc(&hdr->hdr_lba_self, self); 235 le64enc(&hdr->hdr_lba_alt, alt); 236 le64enc(&hdr->hdr_lba_table, tbl); 237 hdr->hdr_crc_self = 0; 238 crc = crc32(hdr, offsetof(struct gpt_hdr, padding)); 239 le64enc(&hdr->hdr_crc_self, crc); 240 return (mkimg_write(fd, self, hdr, 1)); 241 } 242 243 static int 244 gpt_write(int fd, lba_t imgsz, void *bootcode) 245 { 246 uuid_t uuid; 247 struct gpt_ent *tbl; 248 struct gpt_hdr *hdr; 249 uint32_t crc; 250 u_int tblsz; 251 int error; 252 253 /* PMBR */ 254 error = gpt_write_pmbr(fd, imgsz, bootcode); 255 if (error) 256 return (error); 257 258 /* GPT table(s) */ 259 tblsz = gpt_tblsz(); 260 tbl = gpt_mktbl(tblsz); 261 if (tbl == NULL) 262 return (errno); 263 error = mkimg_write(fd, 2, tbl, tblsz); 264 if (error) 265 goto out; 266 error = mkimg_write(fd, imgsz - (tblsz + 1), tbl, tblsz); 267 if (error) 268 goto out; 269 270 /* GPT header(s) */ 271 hdr = malloc(secsz); 272 if (hdr == NULL) { 273 error = errno; 274 goto out; 275 } 276 memset(hdr, 0, secsz); 277 memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)); 278 le32enc(&hdr->hdr_revision, GPT_HDR_REVISION); 279 le32enc(&hdr->hdr_size, offsetof(struct gpt_hdr, padding)); 280 le64enc(&hdr->hdr_lba_start, 2 + tblsz); 281 le64enc(&hdr->hdr_lba_end, imgsz - tblsz - 2); 282 uuidgen(&uuid, 1); 283 gpt_uuid_enc(&hdr->hdr_uuid, &uuid); 284 le32enc(&hdr->hdr_entries, nparts); 285 le32enc(&hdr->hdr_entsz, sizeof(struct gpt_ent)); 286 crc = crc32(tbl, nparts * sizeof(struct gpt_ent)); 287 le32enc(&hdr->hdr_crc_table, crc); 288 error = gpt_write_hdr(fd, hdr, 1, imgsz - 1, 2); 289 if (!error) 290 error = gpt_write_hdr(fd, hdr, imgsz - 1, 1, imgsz - tblsz - 1); 291 free(hdr); 292 293 out: 294 free(tbl); 295 return (error); 296 } 297 298 static struct mkimg_scheme gpt_scheme = { 299 .name = "gpt", 300 .description = "GUID Partition Table", 301 .aliases = gpt_aliases, 302 .metadata = gpt_metadata, 303 .write = gpt_write, 304 .nparts = 4096, 305 .labellen = 36, 306 .bootcode = 512, 307 .maxsecsz = 4096 308 }; 309 310 SCHEME_DEFINE(gpt_scheme); 311