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/param.h> 28#include <sys/errno.h> 29#include <stddef.h> 30#include <stdint.h> 31#include <stdlib.h> 32#include <string.h> 33 34#include <gpt.h> 35#include <mbr.h> 36 37#include "endian.h" 38#include "image.h" 39#include "mkimg.h" 40#include "scheme.h" 41 42static mkimg_uuid_t gpt_uuid_efi = GPT_ENT_TYPE_EFI; 43static mkimg_uuid_t gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD; 44static mkimg_uuid_t gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT; 45static mkimg_uuid_t gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS; 46static mkimg_uuid_t gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; 47static mkimg_uuid_t gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; 48static mkimg_uuid_t gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; 49static mkimg_uuid_t gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; 50static mkimg_uuid_t gpt_uuid_mbr = GPT_ENT_TYPE_MBR; 51static mkimg_uuid_t gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA; 52static mkimg_uuid_t gpt_uuid_prep_boot = GPT_ENT_TYPE_PREP_BOOT; 53 54static struct mkimg_alias gpt_aliases[] = { 55 { ALIAS_EFI, ALIAS_PTR2TYPE(&gpt_uuid_efi) }, 56 { ALIAS_FREEBSD, ALIAS_PTR2TYPE(&gpt_uuid_freebsd) }, 57 { ALIAS_FREEBSD_BOOT, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_boot) }, 58 { ALIAS_FREEBSD_NANDFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_nandfs) }, 59 { ALIAS_FREEBSD_SWAP, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_swap) }, 60 { ALIAS_FREEBSD_UFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_ufs) }, 61 { ALIAS_FREEBSD_VINUM, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_vinum) }, 62 { ALIAS_FREEBSD_ZFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_zfs) }, 63 { ALIAS_MBR, ALIAS_PTR2TYPE(&gpt_uuid_mbr) }, 64 { ALIAS_NTFS, ALIAS_PTR2TYPE(&gpt_uuid_ms_basic_data) }, 65 { ALIAS_PPCBOOT, ALIAS_PTR2TYPE(&gpt_uuid_prep_boot) }, 66 { ALIAS_NONE, 0 } /* Keep last! */ 67}; 68 69/* CRC32 code derived from work by Gary S. Brown. */ 70static const uint32_t crc32_tab[] = { 71 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 72 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 73 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 74 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 75 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 76 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 77 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 78 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 79 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 80 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 81 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 82 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 83 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 84 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 85 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 86 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 87 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 88 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 89 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 90 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 91 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 92 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 93 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 94 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 95 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 96 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 97 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 98 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 99 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 100 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 101 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 102 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 103 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 104 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 105 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 106 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 107 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 108 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 109 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 110 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 111 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 112 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 113 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d 114}; 115 116static uint32_t 117crc32(const void *buf, size_t sz) 118{ 119 const uint8_t *p = (const uint8_t *)buf; 120 uint32_t crc = ~0U; 121 122 while (sz--) 123 crc = crc32_tab[(crc ^ *p++) & 0xff] ^ (crc >> 8); 124 return (crc ^ ~0U); 125} 126 127/* 128 * Return the number of sectors needed to store the partition table. 129 */ 130static u_int 131gpt_tblsz(void) 132{ 133 u_int eps; /* Entries per Sector */ 134 135 /* 136 * Count the number of sectors needed for the GPT Entry Array to store 137 * the number of partitions defined for this image. Enforce the 16kB 138 * minimum space for the GPT Entry Array per UEFI v2.10 Section 5.3. 139 */ 140 eps = secsz / sizeof(struct gpt_ent); 141 return (MAX(howmany(GPT_MIN_RESERVED, secsz), howmany(nparts, eps))); 142} 143 144static lba_t 145gpt_metadata(u_int where, lba_t blk) 146{ 147 148 if (where == SCHEME_META_IMG_START || where == SCHEME_META_IMG_END) { 149 blk += gpt_tblsz(); 150 blk += (where == SCHEME_META_IMG_START) ? 2 : 1; 151 } 152 return (round_block(blk)); 153} 154 155static int 156gpt_write_pmbr(lba_t blks, void *bootcode) 157{ 158 u_char *pmbr; 159 uint32_t secs; 160 int error; 161 162 secs = (blks > UINT32_MAX) ? UINT32_MAX : (uint32_t)blks - 1; 163 164 pmbr = malloc(secsz); 165 if (pmbr == NULL) 166 return (errno); 167 if (bootcode != NULL) { 168 memcpy(pmbr, bootcode, DOSPARTOFF); 169 memset(pmbr + DOSPARTOFF, 0, secsz - DOSPARTOFF); 170 } else 171 memset(pmbr, 0, secsz); 172 pmbr[DOSPARTOFF + 2] = 2; 173 pmbr[DOSPARTOFF + 4] = 0xee; 174 pmbr[DOSPARTOFF + 5] = 0xff; 175 pmbr[DOSPARTOFF + 6] = 0xff; 176 pmbr[DOSPARTOFF + 7] = 0xff; 177 le32enc(pmbr + DOSPARTOFF + 8, 1); 178 le32enc(pmbr + DOSPARTOFF + 12, secs); 179 le16enc(pmbr + DOSMAGICOFFSET, DOSMAGIC); 180 error = image_write(0, pmbr, 1); 181 free(pmbr); 182 return (error); 183} 184 185static struct gpt_ent * 186gpt_mktbl(u_int tblsz) 187{ 188 mkimg_uuid_t uuid; 189 struct gpt_ent *tbl, *ent; 190 struct part *part; 191 int c, idx; 192 193 tbl = calloc(tblsz, secsz); 194 if (tbl == NULL) 195 return (NULL); 196 197 TAILQ_FOREACH(part, &partlist, link) { 198 ent = tbl + part->index; 199 mkimg_uuid_enc(&ent->ent_type, ALIAS_TYPE2PTR(part->type)); 200 mkimg_uuid(&uuid); 201 mkimg_uuid_enc(&ent->ent_uuid, &uuid); 202 le64enc(&ent->ent_lba_start, part->block); 203 le64enc(&ent->ent_lba_end, part->block + part->size - 1); 204 if (part->label != NULL) { 205 idx = 0; 206 while ((c = part->label[idx]) != '\0') { 207 le16enc(ent->ent_name + idx, c); 208 idx++; 209 } 210 } 211 } 212 return (tbl); 213} 214 215static int 216gpt_write_hdr(struct gpt_hdr *hdr, uint64_t self, uint64_t alt, uint64_t tbl) 217{ 218 uint32_t crc; 219 220 le64enc(&hdr->hdr_lba_self, self); 221 le64enc(&hdr->hdr_lba_alt, alt); 222 le64enc(&hdr->hdr_lba_table, tbl); 223 hdr->hdr_crc_self = 0; 224 crc = crc32(hdr, offsetof(struct gpt_hdr, padding)); 225 le64enc(&hdr->hdr_crc_self, crc); 226 return (image_write(self, hdr, 1)); 227} 228 229static int 230gpt_write(lba_t imgsz, void *bootcode) 231{ 232 mkimg_uuid_t uuid; 233 struct gpt_ent *tbl; 234 struct gpt_hdr *hdr; 235 uint32_t crc; 236 u_int tblsz; 237 int error; 238 239 /* PMBR */ 240 error = gpt_write_pmbr(imgsz, bootcode); 241 if (error) 242 return (error); 243 244 /* GPT table(s) */ 245 tblsz = gpt_tblsz(); 246 tbl = gpt_mktbl(tblsz); 247 if (tbl == NULL) 248 return (errno); 249 error = image_write(2, tbl, tblsz); 250 if (error) 251 goto out; 252 error = image_write(imgsz - (tblsz + 1), tbl, tblsz); 253 if (error) 254 goto out; 255 256 /* GPT header(s) */ 257 hdr = malloc(secsz); 258 if (hdr == NULL) { 259 error = errno; 260 goto out; 261 } 262 memset(hdr, 0, secsz); 263 memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)); 264 le32enc(&hdr->hdr_revision, GPT_HDR_REVISION); 265 le32enc(&hdr->hdr_size, offsetof(struct gpt_hdr, padding)); 266 le64enc(&hdr->hdr_lba_start, 2 + tblsz); 267 le64enc(&hdr->hdr_lba_end, imgsz - tblsz - 2); 268 mkimg_uuid(&uuid); 269 mkimg_uuid_enc(&hdr->hdr_uuid, &uuid); 270 le32enc(&hdr->hdr_entries, tblsz * secsz / sizeof(struct gpt_ent)); 271 le32enc(&hdr->hdr_entsz, sizeof(struct gpt_ent)); 272 crc = crc32(tbl, tblsz * secsz); 273 le32enc(&hdr->hdr_crc_table, crc); 274 error = gpt_write_hdr(hdr, 1, imgsz - 1, 2); 275 if (!error) 276 error = gpt_write_hdr(hdr, imgsz - 1, 1, imgsz - tblsz - 1); 277 free(hdr); 278 279 out: 280 free(tbl); 281 return (error); 282} 283 284static struct mkimg_scheme gpt_scheme = { 285 .name = "gpt", 286 .description = "GUID Partition Table", 287 .aliases = gpt_aliases, 288 .metadata = gpt_metadata, 289 .write = gpt_write, 290 .nparts = 4096, 291 .labellen = 36, 292 .bootcode = 512, 293 .maxsecsz = 4096 294}; 295 296SCHEME_DEFINE(gpt_scheme); 297