| /*- |
| * Copyright (c) 2002 Marcel Moolenaar |
| * 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 ``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 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. |
| */ |
| #ifndef LINUX |
| #include <sys/cdefs.h> |
| __FBSDID("$FreeBSD$"); |
| #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 force; |
| static int primary_only; |
| |
| static void |
| usage_create(void) |
| { |
| |
| fprintf(stderr, |
| "usage: %s [-fp] 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; |
| } |
| map = map_find(MAP_TYPE_MBR); |
| if (map != NULL) { |
| if (!force) { |
| warnx("%s: error: device contains a MBR", device_name); |
| return; |
| } |
| |
| /* Nuke the MBR in our internal map. */ |
| map->map_type = MAP_TYPE_UNUSED; |
| } |
| |
| /* |
| * Create PMBR. |
| */ |
| 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); |
| } |
| |
| /* Get the amount of free space after the MBR */ |
| blocks = map_free(1LL, 0LL); |
| if (blocks == 0LL) { |
| warnx("%s: error: no room for the GPT header", device_name); |
| return; |
| } |
| |
| /* Don't create more than parts entries. */ |
| 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++; /* Don't forget the header itself */ |
| } |
| |
| /* Never cross the median of the device. */ |
| if ((blocks + 1LL) > ((last + 1LL) >> 1)) |
| blocks = ((last + 1LL) >> 1) - 1LL; |
| |
| /* |
| * Get the amount of free space at the end of the device and |
| * calculate the size for the GPT structures. |
| */ |
| 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--; /* Number of blocks in the GPT table. */ |
| 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); |
| /* |
| * XXX struct gpt_hdr is not a multiple of 8 bytes in size and thus |
| * contains padding we must not include in the size. |
| */ |
| 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); |
| uuid_create(&uuid, NULL); |
| le_uuid_enc(&hdr->hdr_uuid, &uuid); |
| 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++) { |
| uuid_create(&uuid, NULL); |
| le_uuid_enc(&ent[i].ent_uuid, &uuid); |
| } |
| |
| 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); |
| |
| /* |
| * Create backup GPT if the user didn't suppress it. |
| */ |
| 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; /* Don't ever forget this! */ |
| 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, "fp")) != -1) { |
| switch(ch) { |
| case 'f': |
| force = 1; |
| break; |
| 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); |
| } |