#include <sys/cdefs.h>
#ifdef __FBSDID
__FBSDID("$FreeBSD: src/sbin/gpt/create.c,v 1.9 2004/11/12 04:34:46 marcel Exp $");
#endif
#include <sys/types.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "map.h"
#include "gpt.h"
static int primary_only;
static void
usage_create(void)
{
fprintf(stderr,
"usage: %s [-p] device ...\n", getprogname());
exit(1);
}
static void
create(int fd)
{
uuid_t uuid;
off_t blocks, last;
map_t *gpt, *tpg;
map_t *tbl, *lbt;
map_t *map;
struct mbr *mbr;
struct gpt_hdr *hdr;
struct gpt_ent *ent;
unsigned int i;
last = mediasz / secsz - 1LL;
if (map_find(MAP_TYPE_PRI_GPT_HDR) != NULL ||
map_find(MAP_TYPE_SEC_GPT_HDR) != NULL) {
warnx("%s: error: device already contains a GPT", device_name);
return;
}
if (map_find(MAP_TYPE_MBR) != NULL) {
warnx("%s: error: device contains a MBR", device_name);
return;
}
if (map_find(MAP_TYPE_PMBR) == NULL) {
if (map_free(0LL, 1LL) == 0) {
warnx("%s: error: no room for the PMBR", device_name);
return;
}
mbr = gpt_read(fd, 0LL, 1);
bzero(mbr, sizeof(*mbr));
mbr->mbr_sig = htole16(MBR_SIG);
mbr->mbr_part[0].part_shd = 0xff;
mbr->mbr_part[0].part_ssect = 0xff;
mbr->mbr_part[0].part_scyl = 0xff;
mbr->mbr_part[0].part_typ = 0xee;
mbr->mbr_part[0].part_ehd = 0xff;
mbr->mbr_part[0].part_esect = 0xff;
mbr->mbr_part[0].part_ecyl = 0xff;
mbr->mbr_part[0].part_start_lo = htole16(1);
if (last > 0xffffffff) {
mbr->mbr_part[0].part_size_lo = htole16(0xffff);
mbr->mbr_part[0].part_size_hi = htole16(0xffff);
} else {
mbr->mbr_part[0].part_size_lo = htole16(last);
mbr->mbr_part[0].part_size_hi = htole16(last >> 16);
}
map = map_add(0LL, 1LL, MAP_TYPE_PMBR, mbr);
gpt_write(fd, map);
}
blocks = map_free(1LL, 0LL);
if (blocks == 0LL) {
warnx("%s: error: no room for the GPT header", device_name);
return;
}
if ((uint64_t)(blocks - 1) * secsz > parts * sizeof(struct gpt_ent)) {
blocks = (parts * sizeof(struct gpt_ent)) / secsz;
if ((parts * sizeof(struct gpt_ent)) % secsz)
blocks++;
blocks++;
}
if ((blocks + 1LL) > ((last + 1LL) >> 1))
blocks = ((last + 1LL) >> 1) - 1LL;
map = map_last();
if (map->map_type != MAP_TYPE_UNUSED) {
warnx("%s: error: no room for the backup header", device_name);
return;
}
if (map->map_size < blocks)
blocks = map->map_size;
if (blocks == 1LL) {
warnx("%s: error: no room for the GPT table", device_name);
return;
}
blocks--;
gpt = map_add(1LL, 1LL, MAP_TYPE_PRI_GPT_HDR, calloc(1, secsz));
tbl = map_add(2LL, blocks, MAP_TYPE_PRI_GPT_TBL,
calloc(blocks, secsz));
if (gpt == NULL || tbl == NULL)
return;
hdr = gpt->map_data;
memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig));
hdr->hdr_revision = htole32(GPT_HDR_REVISION);
hdr->hdr_size = htole32(offsetof(struct gpt_hdr, padding));
hdr->hdr_lba_self = htole64(gpt->map_start);
hdr->hdr_lba_alt = htole64(last);
hdr->hdr_lba_start = htole64(tbl->map_start + blocks);
hdr->hdr_lba_end = htole64(last - blocks - 1LL);
#ifdef __APPLE__
uuid_generate(uuid);
le_uuid_enc(hdr->hdr_uuid, uuid);
#else
uuid_create(&uuid, NULL);
le_uuid_enc(&hdr->hdr_uuid, &uuid);
#endif
hdr->hdr_lba_table = htole64(tbl->map_start);
hdr->hdr_entries = htole32((blocks * secsz) / sizeof(struct gpt_ent));
if (le32toh(hdr->hdr_entries) > parts)
hdr->hdr_entries = htole32(parts);
hdr->hdr_entsz = htole32(sizeof(struct gpt_ent));
ent = tbl->map_data;
for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
#ifdef __APPLE__
uuid_generate(uuid);
le_uuid_enc(ent[i].ent_uuid, uuid);
#else
uuid_create(&uuid, NULL);
le_uuid_enc(&ent[i].ent_uuid, &uuid);
#endif
}
hdr->hdr_crc_table = htole32(crc32(ent, le32toh(hdr->hdr_entries) *
le32toh(hdr->hdr_entsz)));
hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
gpt_write(fd, gpt);
gpt_write(fd, tbl);
if (!primary_only) {
tpg = map_add(last, 1LL, MAP_TYPE_SEC_GPT_HDR,
calloc(1, secsz));
lbt = map_add(last - blocks, blocks, MAP_TYPE_SEC_GPT_TBL,
tbl->map_data);
memcpy(tpg->map_data, gpt->map_data, secsz);
hdr = tpg->map_data;
hdr->hdr_lba_self = htole64(tpg->map_start);
hdr->hdr_lba_alt = htole64(gpt->map_start);
hdr->hdr_lba_table = htole64(lbt->map_start);
hdr->hdr_crc_self = 0;
hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
gpt_write(fd, lbt);
gpt_write(fd, tpg);
}
}
int
cmd_create(int argc, char *argv[])
{
int ch, fd;
while ((ch = getopt(argc, argv, "p")) != -1) {
switch(ch) {
case 'p':
primary_only = 1;
break;
default:
usage_create();
}
}
if (argc == optind)
usage_create();
while (optind < argc) {
fd = gpt_open(argv[optind++]);
if (fd == -1) {
warn("unable to open device '%s'", device_name);
continue;
}
create(fd);
gpt_close(fd);
}
return (0);
}