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/migrate.c,v 1.16 2005/09/01 02:42:52 marcel Exp $
27 * $DragonFly: src/sbin/gpt/migrate.c,v 1.3 2007/06/18 05:13:39 dillon Exp $
30 #include <sys/types.h>
31 #include <sys/disklabel32.h>
32 #include <sys/dtype.h>
45 * Allow compilation on platforms that do not have a BSD label.
46 * The values are valid for x86_64, i386 and ia64 disklabels.
63 "usage: %s [-fs] device ...\n", getprogname());
67 static struct gpt_ent*
68 migrate_disklabel(int fd, off_t start, struct gpt_ent *ent)
71 struct disklabel32 *dl;
75 buf = gpt_read(fd, start + LABELSECTOR32, 1);
76 dl = (void*)(buf + LABELOFFSET32);
78 if (le32toh(dl->d_magic) != DISKMAGIC32 ||
79 le32toh(dl->d_magic2) != DISKMAGIC32) {
80 warnx("%s: warning: FreeBSD slice without disklabel",
85 rawofs = le32toh(dl->d_partitions[RAW_PART].p_offset) *
86 le32toh(dl->d_secsize);
87 for (i = 0; i < le16toh(dl->d_npartitions); i++) {
88 if (dl->d_partitions[i].p_fstype == FS_UNUSED)
90 ofs = le32toh(dl->d_partitions[i].p_offset) *
91 le32toh(dl->d_secsize);
97 for (i = 0; i < le16toh(dl->d_npartitions); i++) {
98 switch (dl->d_partitions[i].p_fstype) {
102 uuid_t swap = GPT_ENT_TYPE_FREEBSD_SWAP;
103 le_uuid_enc(&ent->ent_type, &swap);
104 utf8_to_utf16("FreeBSD swap partition",
109 uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS;
110 le_uuid_enc(&ent->ent_type, &ufs);
111 utf8_to_utf16("FreeBSD UFS partition",
116 uuid_t vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
117 le_uuid_enc(&ent->ent_type, &vinum);
118 utf8_to_utf16("FreeBSD vinum partition",
123 warnx("%s: warning: unknown FreeBSD partition (%d)",
124 device_name, dl->d_partitions[i].p_fstype);
128 ofs = (le32toh(dl->d_partitions[i].p_offset) *
129 le32toh(dl->d_secsize)) / secsz;
130 ofs = (ofs > 0) ? ofs - rawofs : 0;
131 ent->ent_lba_start = htole64(start + ofs);
132 ent->ent_lba_end = htole64(start + ofs +
133 le32toh(dl->d_partitions[i].p_size) - 1LL);
151 uint32_t start, size;
154 last = mediasz / secsz - 1LL;
156 map = map_find(MAP_TYPE_MBR);
157 if (map == NULL || map->map_start != 0) {
158 warnx("%s: error: no partitions to convert", device_name);
164 if (map_find(MAP_TYPE_PRI_GPT_HDR) != NULL ||
165 map_find(MAP_TYPE_SEC_GPT_HDR) != NULL) {
166 warnx("%s: error: device already contains a GPT", device_name);
170 /* Get the amount of free space after the MBR */
171 blocks = map_free(1LL, 0LL);
173 warnx("%s: error: no room for the GPT header", device_name);
177 /* Don't create more than parts entries. */
178 if ((uint64_t)(blocks - 1) * secsz > parts * sizeof(struct gpt_ent)) {
179 blocks = (parts * sizeof(struct gpt_ent)) / secsz;
180 if ((parts * sizeof(struct gpt_ent)) % secsz)
182 blocks++; /* Don't forget the header itself */
185 /* Never cross the median of the device. */
186 if ((blocks + 1LL) > ((last + 1LL) >> 1))
187 blocks = ((last + 1LL) >> 1) - 1LL;
190 * Get the amount of free space at the end of the device and
191 * calculate the size for the GPT structures.
194 if (map->map_type != MAP_TYPE_UNUSED) {
195 warnx("%s: error: no room for the backup header", device_name);
199 if (map->map_size < blocks)
200 blocks = map->map_size;
202 warnx("%s: error: no room for the GPT table", device_name);
206 blocks--; /* Number of blocks in the GPT table. */
207 gpt = map_add(1LL, 1LL, MAP_TYPE_PRI_GPT_HDR, calloc(1, secsz));
208 tbl = map_add(2LL, blocks, MAP_TYPE_PRI_GPT_TBL,
209 calloc(blocks, secsz));
210 if (gpt == NULL || tbl == NULL)
213 lbt = map_add(last - blocks, blocks, MAP_TYPE_SEC_GPT_TBL,
215 tpg = map_add(last, 1LL, MAP_TYPE_SEC_GPT_HDR, calloc(1, secsz));
218 memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig));
219 hdr->hdr_revision = htole32(GPT_HDR_REVISION);
221 * XXX struct gpt_hdr is not a multiple of 8 bytes in size and thus
222 * contains padding we must not include in the size.
224 hdr->hdr_size = htole32(offsetof(struct gpt_hdr, padding));
225 hdr->hdr_lba_self = htole64(gpt->map_start);
226 hdr->hdr_lba_alt = htole64(tpg->map_start);
227 hdr->hdr_lba_start = htole64(tbl->map_start + blocks);
228 hdr->hdr_lba_end = htole64(lbt->map_start - 1LL);
229 uuid_create(&uuid, NULL);
230 le_uuid_enc(&hdr->hdr_uuid, &uuid);
231 hdr->hdr_lba_table = htole64(tbl->map_start);
232 hdr->hdr_entries = htole32((blocks * secsz) / sizeof(struct gpt_ent));
233 if (le32toh(hdr->hdr_entries) > parts)
234 hdr->hdr_entries = htole32(parts);
235 hdr->hdr_entsz = htole32(sizeof(struct gpt_ent));
238 for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
239 uuid_create(&uuid, NULL);
240 le_uuid_enc(&ent[i].ent_uuid, &uuid);
243 /* Mirror partitions. */
244 for (i = 0; i < 4; i++) {
245 start = le16toh(mbr->mbr_part[i].part_start_hi);
246 start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo);
247 size = le16toh(mbr->mbr_part[i].part_size_hi);
248 size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo);
250 switch (mbr->mbr_part[i].part_typ) {
253 case 165: { /* FreeBSD */
255 uuid_t freebsd = GPT_ENT_TYPE_FREEBSD;
256 le_uuid_enc(&ent->ent_type, &freebsd);
257 ent->ent_lba_start = htole64((uint64_t)start);
258 ent->ent_lba_end = htole64(start + size - 1LL);
259 utf8_to_utf16("FreeBSD disklabel partition",
263 ent = migrate_disklabel(fd, start, ent);
266 case 239: { /* EFI */
267 uuid_t efi_slice = GPT_ENT_TYPE_EFI;
268 le_uuid_enc(&ent->ent_type, &efi_slice);
269 ent->ent_lba_start = htole64((uint64_t)start);
270 ent->ent_lba_end = htole64(start + size - 1LL);
271 utf8_to_utf16("EFI system partition",
278 warnx("%s: error: unknown partition type (%d)",
279 device_name, mbr->mbr_part[i].part_typ);
286 hdr->hdr_crc_table = htole32(crc32(ent, le32toh(hdr->hdr_entries) *
287 le32toh(hdr->hdr_entsz)));
288 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
296 memcpy(tpg->map_data, gpt->map_data, secsz);
298 hdr->hdr_lba_self = htole64(tpg->map_start);
299 hdr->hdr_lba_alt = htole64(gpt->map_start);
300 hdr->hdr_lba_table = htole64(lbt->map_start);
301 hdr->hdr_crc_self = 0; /* Don't ever forget this! */
302 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
307 map = map_find(MAP_TYPE_MBR);
310 * Turn the MBR into a Protective MBR.
312 bzero(mbr->mbr_part, sizeof(mbr->mbr_part));
313 mbr->mbr_part[0].part_shd = 0xff;
314 mbr->mbr_part[0].part_ssect = 0xff;
315 mbr->mbr_part[0].part_scyl = 0xff;
316 mbr->mbr_part[0].part_typ = 0xee;
317 mbr->mbr_part[0].part_ehd = 0xff;
318 mbr->mbr_part[0].part_esect = 0xff;
319 mbr->mbr_part[0].part_ecyl = 0xff;
320 mbr->mbr_part[0].part_start_lo = htole16(1);
321 if (last > 0xffffffff) {
322 mbr->mbr_part[0].part_size_lo = htole16(0xffff);
323 mbr->mbr_part[0].part_size_hi = htole16(0xffff);
325 mbr->mbr_part[0].part_size_lo = htole16(last);
326 mbr->mbr_part[0].part_size_hi = htole16(last >> 16);
332 cmd_migrate(int argc, char *argv[])
336 /* Get the migrate options */
337 while ((ch = getopt(argc, argv, "fs")) != -1) {
353 while (optind < argc) {
354 fd = gpt_open(argv[optind++]);
356 warn("unable to open device '%s'", device_name);