FreeBSD-5.3/sbin/gpt/migrate.c
/*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sbin/gpt/migrate.c,v 1.7 2004/08/07 06:24:25 marcel Exp $");
#include <sys/types.h>
#include <sys/disklabel.h>
#include <sys/gpt.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <uuid.h>
#include "map.h"
#include "gpt.h"
/*
* Allow compilation on platforms that do not have a BSD label.
* The values are valid for amd64, i386 and ia64 disklabels.
*/
#ifndef LABELOFFSET
#define LABELOFFSET 0
#endif
#ifndef LABELSECTOR
#define LABELSECTOR 1
#endif
int keep, slice;
static void
usage_migrate(void)
{
fprintf(stderr,
"usage: %s [-ks] device\n", getprogname());
exit(1);
}
static struct gpt_ent*
migrate_disklabel(int fd, off_t start, struct gpt_ent *ent)
{
char *buf;
struct disklabel *dl;
int i;
buf = gpt_read(fd, start + LABELSECTOR, 1);
dl = (void*)(buf + LABELOFFSET);
if (dl->d_magic != DISKMAGIC || dl->d_magic2 != DISKMAGIC) {
warnx("%s: warning: FreeBSD slice without disklabel",
device_name);
return (ent);
}
for (i = 0; i < dl->d_npartitions; i++) {
switch (dl->d_partitions[i].p_fstype) {
case FS_SWAP: {
uuid_t swap = GPT_ENT_TYPE_FREEBSD_SWAP;
ent->ent_type = swap;
unicode16(ent->ent_name,
L"FreeBSD swap partition", 36);
break;
}
case FS_BSDFFS: {
uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS;
ent->ent_type = ufs;
unicode16(ent->ent_name,
L"FreeBSD UFS partition", 36);
break;
}
case FS_VINUM: {
uuid_t vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
ent->ent_type = vinum;
unicode16(ent->ent_name,
L"FreeBSD vinum partition", 36);
break;
}
default:
warnx("%s: warning: unknown FreeBSD partition (%d)",
device_name, dl->d_partitions[i].p_fstype);
continue;
}
ent->ent_lba_start = dl->d_partitions[i].p_offset;
ent->ent_lba_end = ent->ent_lba_start +
dl->d_partitions[i].p_size - 1LL;
ent++;
}
return (ent);
}
static void
migrate(int fd)
{
off_t blocks, last;
map_t *gpt, *tpg;
map_t *tbl, *lbt;
map_t *map;
struct gpt_hdr *hdr;
struct gpt_ent *ent;
struct mbr *mbr;
uint32_t start, size;
unsigned int i;
last = mediasz / secsz - 1LL;
map = map_find(MAP_TYPE_MBR);
if (map == NULL || map->map_start != 0) {
warnx("%s: error: no partitions to convert", device_name);
return;
}
mbr = map->map_data;
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;
}
/* 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;
lbt = map_add(last - blocks, blocks, MAP_TYPE_SEC_GPT_TBL,
tbl->map_data);
tpg = map_add(last, 1LL, MAP_TYPE_SEC_GPT_HDR, calloc(1, secsz));
hdr = gpt->map_data;
memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig));
hdr->hdr_revision = 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 = offsetof(struct gpt_hdr, padding);
hdr->hdr_lba_self = gpt->map_start;
hdr->hdr_lba_alt = tpg->map_start;
hdr->hdr_lba_start = tbl->map_start + blocks;
hdr->hdr_lba_end = lbt->map_start - 1LL;
uuid_create(&hdr->hdr_uuid, NULL);
hdr->hdr_lba_table = tbl->map_start;
hdr->hdr_entries = (blocks * secsz) / sizeof(struct gpt_ent);
if (hdr->hdr_entries > parts)
hdr->hdr_entries = parts;
hdr->hdr_entsz = sizeof(struct gpt_ent);
ent = tbl->map_data;
for (i = 0; i < hdr->hdr_entries; i++)
uuid_create(&ent[i].ent_uuid, NULL);
/* Mirror partitions. */
for (i = 0; i < 4; i++) {
start = mbr->mbr_part[i].part_start_hi;
start = (start << 16) + mbr->mbr_part[i].part_start_lo;
size = mbr->mbr_part[i].part_size_hi;
size = (size << 16) + mbr->mbr_part[i].part_size_lo;
switch (mbr->mbr_part[i].part_typ) {
case 0:
continue;
case 165: { /* FreeBSD */
if (slice) {
uuid_t freebsd = GPT_ENT_TYPE_FREEBSD;
ent->ent_type = freebsd;
ent->ent_lba_start = start;
ent->ent_lba_end = start + size - 1LL;
unicode16(ent->ent_name,
L"FreeBSD disklabel partition", 36);
ent++;
} else
ent = migrate_disklabel(fd, start, ent);
break;
}
case 239: { /* EFI */
uuid_t efi_slice = GPT_ENT_TYPE_EFI;
ent->ent_type = efi_slice;
ent->ent_lba_start = start;
ent->ent_lba_end = start + size - 1LL;
unicode16(ent->ent_name, L"EFI system partition", 36);
ent++;
break;
}
default:
warnx("%s: error: unknown partition type (%d)",
device_name, mbr->mbr_part[i].part_typ);
return;
}
}
ent = tbl->map_data;
hdr->hdr_crc_table = crc32(ent, hdr->hdr_entries * hdr->hdr_entsz);
hdr->hdr_crc_self = crc32(hdr, hdr->hdr_size);
gpt_write(fd, gpt);
gpt_write(fd, tbl);
/*
* Create backup GPT.
*/
memcpy(tpg->map_data, gpt->map_data, secsz);
hdr = tpg->map_data;
hdr->hdr_lba_self = tpg->map_start;
hdr->hdr_lba_alt = gpt->map_start;
hdr->hdr_lba_table = lbt->map_start;
hdr->hdr_crc_self = 0; /* Don't ever forget this! */
hdr->hdr_crc_self = crc32(hdr, hdr->hdr_size);
gpt_write(fd, lbt);
gpt_write(fd, tpg);
if (!keep) {
map = map_find(MAP_TYPE_MBR);
mbr = map->map_data;
/*
* Turn the MBR into a Protective MBR.
*/
bzero(mbr->mbr_part, sizeof(mbr->mbr_part));
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 = 1;
if (mediasz > 0xffffffff) {
mbr->mbr_part[0].part_size_lo = 0xffff;
mbr->mbr_part[0].part_size_hi = 0xffff;
} else {
mbr->mbr_part[0].part_size_lo = mediasz & 0xffff;
mbr->mbr_part[0].part_size_hi = mediasz >> 16;
}
gpt_write(fd, map);
}
}
int
cmd_migrate(int argc, char *argv[])
{
int ch, fd;
/* Get the migrate options */
while ((ch = getopt(argc, argv, "ks")) != -1) {
switch(ch) {
case 'k':
keep = 1;
break;
case 's':
slice = 1;
break;
default:
usage_migrate();
}
}
if (argc == optind)
usage_migrate();
while (optind < argc) {
fd = gpt_open(argv[optind++]);
if (fd == -1) {
warn("unable to open device '%s'", device_name);
continue;
}
migrate(fd);
gpt_close(fd);
}
return (0);
}