/*
* 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/gpt.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"
int recoverable;
static void
usage_recover(void)
{
fprintf(stderr,
"usage: %s device ...\n", getprogname());
exit(1);
}
static void
recover(int fd)
{
off_t last;
map_t *gpt, *tpg;
map_t *tbl, *lbt;
struct gpt_hdr *hdr;
if (map_find(MAP_TYPE_MBR) != NULL) {
warnx("%s: error: device contains a MBR", device_name);
return;
}
gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
tbl = map_find(MAP_TYPE_PRI_GPT_TBL);
lbt = map_find(MAP_TYPE_SEC_GPT_TBL);
if (gpt == NULL && tpg == NULL) {
warnx("%s: no primary or secondary GPT headers, can't recover",
device_name);
return;
}
if (tbl == NULL && lbt == NULL) {
warnx("%s: no primary or secondary GPT tables, can't recover",
device_name);
return;
}
last = mediasz / secsz - 1LL;
if (tbl != NULL && lbt == NULL) {
lbt = map_add(last - tbl->map_size, tbl->map_size,
MAP_TYPE_SEC_GPT_TBL, tbl->map_data);
if (lbt == NULL) {
warnx("%s: adding secondary GPT table failed",
device_name);
return;
}
gpt_write(fd, lbt);
warnx("%s: recovered secondary GPT table from primary",
device_name);
} else if (tbl == NULL && lbt != NULL) {
tbl = map_add(2LL, lbt->map_size, MAP_TYPE_PRI_GPT_TBL,
lbt->map_data);
if (tbl == NULL) {
warnx("%s: adding primary GPT table failed",
device_name);
return;
}
gpt_write(fd, tbl);
warnx("%s: recovered primary GPT table from secondary",
device_name);
}
if (gpt != NULL && tpg == NULL) {
tpg = map_add(last, 1LL, MAP_TYPE_SEC_GPT_HDR,
calloc(1, secsz));
if (tpg == NULL) {
warnx("%s: adding secondary GPT header failed",
device_name);
return;
}
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;
hdr->hdr_crc_self = crc32(hdr, hdr->hdr_size);
gpt_write(fd, tpg);
warnx("%s: recovered secondary GPT header from primary",
device_name);
} else if (gpt == NULL && tpg != NULL) {
gpt = map_add(1LL, 1LL, MAP_TYPE_PRI_GPT_HDR,
calloc(1, secsz));
if (gpt == NULL) {
warnx("%s: adding primary GPT header failed",
device_name);
return;
}
memcpy(gpt->map_data, tpg->map_data, secsz);
hdr = gpt->map_data;
hdr->hdr_lba_self = gpt->map_start;
hdr->hdr_lba_alt = tpg->map_start;
hdr->hdr_lba_table = tbl->map_start;
hdr->hdr_crc_self = 0;
hdr->hdr_crc_self = crc32(hdr, hdr->hdr_size);
gpt_write(fd, gpt);
warnx("%s: recovered primary GPT header from secondary",
device_name);
}
}
int
cmd_recover(int argc, char *argv[])
{
int ch, fd;
while ((ch = getopt(argc, argv, "r")) != -1) {
switch(ch) {
case 'r':
recoverable = 1;
break;
default:
usage_recover();
}
}
if (argc == optind)
usage_recover();
while (optind < argc) {
fd = gpt_open(argv[optind++]);
if (fd == -1) {
warn("unable to open device '%s'", device_name);
continue;
}
recover(fd);
gpt_close(fd);
}
return (0);
}
