2 * Copyright (c) 2002 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * $FreeBSD: src/sbin/gpt/create.c,v 1.11 2005/08/31 01:47:19 marcel Exp $
27 * $DragonFly: src/sbin/gpt/create.c,v 1.1 2007/06/16 22:29:27 dillon Exp $
30 #include <sys/types.h>
43 static int primary_only;
50 "usage: %s [-fp] device ...\n", getprogname());
67 last = mediasz / secsz - 1LL;
69 if (map_find(MAP_TYPE_PRI_GPT_HDR) != NULL ||
70 map_find(MAP_TYPE_SEC_GPT_HDR) != NULL) {
71 warnx("%s: error: device already contains a GPT", device_name);
74 map = map_find(MAP_TYPE_MBR);
77 warnx("%s: error: device contains a MBR", device_name);
81 /* Nuke the MBR in our internal map. */
82 map->map_type = MAP_TYPE_UNUSED;
88 if (map_find(MAP_TYPE_PMBR) == NULL) {
89 if (map_free(0LL, 1LL) == 0) {
90 warnx("%s: error: no room for the PMBR", device_name);
93 mbr = gpt_read(fd, 0LL, 1);
94 bzero(mbr, sizeof(*mbr));
95 mbr->mbr_sig = htole16(MBR_SIG);
96 mbr->mbr_part[0].part_shd = 0xff;
97 mbr->mbr_part[0].part_ssect = 0xff;
98 mbr->mbr_part[0].part_scyl = 0xff;
99 mbr->mbr_part[0].part_typ = 0xee;
100 mbr->mbr_part[0].part_ehd = 0xff;
101 mbr->mbr_part[0].part_esect = 0xff;
102 mbr->mbr_part[0].part_ecyl = 0xff;
103 mbr->mbr_part[0].part_start_lo = htole16(1);
104 if (last > 0xffffffff) {
105 mbr->mbr_part[0].part_size_lo = htole16(0xffff);
106 mbr->mbr_part[0].part_size_hi = htole16(0xffff);
108 mbr->mbr_part[0].part_size_lo = htole16(last);
109 mbr->mbr_part[0].part_size_hi = htole16(last >> 16);
111 map = map_add(0LL, 1LL, MAP_TYPE_PMBR, mbr);
115 /* Get the amount of free space after the MBR */
116 blocks = map_free(1LL, 0LL);
118 warnx("%s: error: no room for the GPT header", device_name);
122 /* Don't create more than parts entries. */
123 if ((uint64_t)(blocks - 1) * secsz > parts * sizeof(struct gpt_ent)) {
124 blocks = (parts * sizeof(struct gpt_ent)) / secsz;
125 if ((parts * sizeof(struct gpt_ent)) % secsz)
127 blocks++; /* Don't forget the header itself */
130 /* Never cross the median of the device. */
131 if ((blocks + 1LL) > ((last + 1LL) >> 1))
132 blocks = ((last + 1LL) >> 1) - 1LL;
135 * Get the amount of free space at the end of the device and
136 * calculate the size for the GPT structures.
139 if (map->map_type != MAP_TYPE_UNUSED) {
140 warnx("%s: error: no room for the backup header", device_name);
144 if (map->map_size < blocks)
145 blocks = map->map_size;
147 warnx("%s: error: no room for the GPT table", device_name);
151 blocks--; /* Number of blocks in the GPT table. */
152 gpt = map_add(1LL, 1LL, MAP_TYPE_PRI_GPT_HDR, calloc(1, secsz));
153 tbl = map_add(2LL, blocks, MAP_TYPE_PRI_GPT_TBL,
154 calloc(blocks, secsz));
155 if (gpt == NULL || tbl == NULL)
159 memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig));
160 hdr->hdr_revision = htole32(GPT_HDR_REVISION);
162 * XXX struct gpt_hdr is not a multiple of 8 bytes in size and thus
163 * contains padding we must not include in the size.
165 hdr->hdr_size = htole32(offsetof(struct gpt_hdr, padding));
166 hdr->hdr_lba_self = htole64(gpt->map_start);
167 hdr->hdr_lba_alt = htole64(last);
168 hdr->hdr_lba_start = htole64(tbl->map_start + blocks);
169 hdr->hdr_lba_end = htole64(last - blocks - 1LL);
170 uuid_create(&uuid, NULL);
171 le_uuid_enc(&hdr->hdr_uuid, &uuid);
172 hdr->hdr_lba_table = htole64(tbl->map_start);
173 hdr->hdr_entries = htole32((blocks * secsz) / sizeof(struct gpt_ent));
174 if (le32toh(hdr->hdr_entries) > parts)
175 hdr->hdr_entries = htole32(parts);
176 hdr->hdr_entsz = htole32(sizeof(struct gpt_ent));
179 for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
180 uuid_create(&uuid, NULL);
181 le_uuid_enc(&ent[i].ent_uuid, &uuid);
184 hdr->hdr_crc_table = htole32(crc32(ent, le32toh(hdr->hdr_entries) *
185 le32toh(hdr->hdr_entsz)));
186 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
192 * Create backup GPT if the user didn't suppress it.
195 tpg = map_add(last, 1LL, MAP_TYPE_SEC_GPT_HDR,
197 lbt = map_add(last - blocks, blocks, MAP_TYPE_SEC_GPT_TBL,
199 memcpy(tpg->map_data, gpt->map_data, secsz);
201 hdr->hdr_lba_self = htole64(tpg->map_start);
202 hdr->hdr_lba_alt = htole64(gpt->map_start);
203 hdr->hdr_lba_table = htole64(lbt->map_start);
204 hdr->hdr_crc_self = 0; /* Don't ever forget this! */
205 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
212 cmd_create(int argc, char *argv[])
216 while ((ch = getopt(argc, argv, "fp")) != -1) {
232 while (optind < argc) {
233 fd = gpt_open(argv[optind++]);
235 warn("unable to open device '%s'", device_name);