diff options
Diffstat (limited to 'usr.bin/mkimg/gpt.c')
| -rw-r--r-- | usr.bin/mkimg/gpt.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/usr.bin/mkimg/gpt.c b/usr.bin/mkimg/gpt.c new file mode 100644 index 0000000..033b307 --- /dev/null +++ b/usr.bin/mkimg/gpt.c @@ -0,0 +1,303 @@ +/*- + * Copyright (c) 2014 Juniper Networks, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/diskmbr.h> +#include <sys/endian.h> +#include <sys/errno.h> +#include <sys/gpt.h> +#include <stddef.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <uuid.h> + +#include "mkimg.h" +#include "scheme.h" + +static uuid_t gpt_uuid_efi = GPT_ENT_TYPE_EFI; +static uuid_t gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD; +static uuid_t gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT; +static uuid_t gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS; +static uuid_t gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; +static uuid_t gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; +static uuid_t gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; +static uuid_t gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; +static uuid_t gpt_uuid_mbr = GPT_ENT_TYPE_MBR; + +static struct mkimg_alias gpt_aliases[] = { + { ALIAS_EFI, ALIAS_PTR2TYPE(&gpt_uuid_efi) }, + { ALIAS_FREEBSD, ALIAS_PTR2TYPE(&gpt_uuid_freebsd) }, + { ALIAS_FREEBSD_BOOT, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_boot) }, + { ALIAS_FREEBSD_NANDFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_nandfs) }, + { ALIAS_FREEBSD_SWAP, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_swap) }, + { ALIAS_FREEBSD_UFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_ufs) }, + { ALIAS_FREEBSD_VINUM, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_vinum) }, + { ALIAS_FREEBSD_ZFS, ALIAS_PTR2TYPE(&gpt_uuid_freebsd_zfs) }, + { ALIAS_MBR, ALIAS_PTR2TYPE(&gpt_uuid_mbr) }, + { ALIAS_NONE, 0 } /* Keep last! */ +}; + +/* CRC32 code derived from work by Gary S. Brown. */ +static const uint32_t crc32_tab[] = { + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, + 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, + 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, + 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, + 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, + 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, + 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, + 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, + 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, + 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, + 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, + 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, + 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, + 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, + 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, + 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, + 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, + 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, + 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, + 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, + 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, + 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d +}; + +static uint32_t +crc32(const void *buf, size_t sz) +{ + const uint8_t *p = (const uint8_t *)buf; + uint32_t crc = ~0U; + + while (sz--) + crc = crc32_tab[(crc ^ *p++) & 0xff] ^ (crc >> 8); + return (crc ^ ~0U); +} + +static u_int +gpt_tblsz(void) +{ + u_int ents; + + ents = secsz / sizeof(struct gpt_ent); + return ((nparts + ents - 1) / ents); +} + +static u_int +gpt_metadata(u_int where) +{ + u_int secs; + + if (where != SCHEME_META_IMG_START && where != SCHEME_META_IMG_END) + return (0); + + secs = gpt_tblsz(); + secs += (where == SCHEME_META_IMG_START) ? 2 : 1; + return (secs); +} + +static int +gpt_filewrite(int fd, lba_t blk, void *buf, ssize_t bufsz) +{ + int error; + + error = mkimg_seek(fd, blk); + if (error == 0) { + if (write(fd, buf, bufsz) != bufsz) + error = errno; + } + return (error); +} + +static int +gpt_write_pmbr(int fd, lba_t blks, void *bootcode) +{ + u_char *pmbr; + uint32_t secs; + int error; + + secs = (blks > UINT32_MAX) ? UINT32_MAX : (uint32_t)blks; + + pmbr = malloc(secsz); + if (pmbr == NULL) + return (errno); + if (bootcode != NULL) { + memcpy(pmbr, bootcode, DOSPARTOFF); + memset(pmbr + DOSPARTOFF, 0, secsz - DOSPARTOFF); + } else + memset(pmbr, 0, secsz); + pmbr[DOSPARTOFF + 2] = 2; + pmbr[DOSPARTOFF + 4] = 0xee; + pmbr[DOSPARTOFF + 5] = 0xff; + pmbr[DOSPARTOFF + 6] = 0xff; + pmbr[DOSPARTOFF + 7] = 0xff; + le32enc(pmbr + DOSPARTOFF + 8, 1); + le32enc(pmbr + DOSPARTOFF + 12, secs); + le16enc(pmbr + DOSMAGICOFFSET, DOSMAGIC); + error = gpt_filewrite(fd, 0, pmbr, secsz); + free(pmbr); + return (error); +} + +static struct gpt_ent * +gpt_mktbl(u_int tblsz) +{ + uuid_t uuid; + struct gpt_ent *tbl, *ent; + struct part *part; + int c, idx; + + tbl = calloc(tblsz, secsz); + if (tbl == NULL) + return (NULL); + + STAILQ_FOREACH(part, &partlist, link) { + ent = tbl + part->index; + uuid_enc_le(&ent->ent_type, ALIAS_TYPE2PTR(part->type)); + uuidgen(&uuid, 1); + uuid_enc_le(&ent->ent_uuid, &uuid); + le64enc(&ent->ent_lba_start, part->block); + le64enc(&ent->ent_lba_end, part->block + part->size - 1); + if (part->label != NULL) { + idx = 0; + while ((c = part->label[idx]) != '\0') { + le16enc(ent->ent_name + idx, c); + idx++; + } + } + } + return (tbl); +} + +static int +gpt_write_hdr(int fd, struct gpt_hdr *hdr, uint64_t self, uint64_t alt, + uint64_t tbl) +{ + uint32_t crc; + + le64enc(&hdr->hdr_lba_self, self); + le64enc(&hdr->hdr_lba_alt, alt); + le64enc(&hdr->hdr_lba_table, tbl); + hdr->hdr_crc_self = 0; + crc = crc32(hdr, offsetof(struct gpt_hdr, padding)); + le64enc(&hdr->hdr_crc_self, crc); + return (gpt_filewrite(fd, self, hdr, secsz)); +} + +static int +gpt_write(int fd, lba_t imgsz, void *bootcode) +{ + uuid_t uuid; + struct gpt_ent *tbl; + struct gpt_hdr *hdr; + uint32_t crc; + u_int tblsz; + int error; + + /* PMBR */ + error = gpt_write_pmbr(fd, imgsz, bootcode); + if (error) + return (error); + + /* GPT table(s) */ + tblsz = gpt_tblsz(); + tbl = gpt_mktbl(tblsz); + if (tbl == NULL) + return (errno); + error = gpt_filewrite(fd, 2, tbl, tblsz * secsz); + if (error) + goto out; + error = gpt_filewrite(fd, imgsz - (tblsz + 1), tbl, tblsz * secsz); + if (error) + goto out; + + /* GPT header(s) */ + hdr = malloc(secsz); + if (hdr == NULL) { + error = errno; + goto out; + } + memset(hdr, 0, secsz); + memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)); + le32enc(&hdr->hdr_revision, GPT_HDR_REVISION); + le32enc(&hdr->hdr_size, offsetof(struct gpt_hdr, padding)); + le64enc(&hdr->hdr_lba_start, 2 + tblsz); + le64enc(&hdr->hdr_lba_end, imgsz - tblsz - 2); + uuidgen(&uuid, 1); + uuid_enc_le(&hdr->hdr_uuid, &uuid); + le32enc(&hdr->hdr_entries, nparts); + le32enc(&hdr->hdr_entsz, sizeof(struct gpt_ent)); + crc = crc32(tbl, nparts * sizeof(struct gpt_ent)); + le32enc(&hdr->hdr_crc_table, crc); + error = gpt_write_hdr(fd, hdr, 1, imgsz - 1, 2); + if (!error) + error = gpt_write_hdr(fd, hdr, imgsz - 1, 1, imgsz - tblsz - 1); + free(hdr); + + out: + free(tbl); + return (error); +} + +static struct mkimg_scheme gpt_scheme = { + .name = "gpt", + .description = "GUID Partition Table", + .aliases = gpt_aliases, + .metadata = gpt_metadata, + .write = gpt_write, + .nparts = 4096, + .labellen = 36, + .bootcode = 512, + .maxsecsz = 4096 +}; + +SCHEME_DEFINE(gpt_scheme); |
