| /*- |
| * 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 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 = 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; |
| hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(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 = htole64(gpt->map_start); |
| hdr->hdr_lba_alt = htole64(tpg->map_start); |
| hdr->hdr_lba_table = htole64(tbl->map_start); |
| hdr->hdr_crc_self = 0; |
| hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(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); |
| } |