445 lines
13 KiB
C
445 lines
13 KiB
C
/*-
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* Copyright (c) 2002 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#ifdef __FBSDID
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__FBSDID("$FreeBSD: src/sbin/gpt/create.c,v 1.11 2005/08/31 01:47:19 marcel Exp $");
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#endif
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#ifdef __RCSID
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__RCSID("$NetBSD: restore.c,v 1.18 2018/07/03 03:41:24 jnemeth Exp $");
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#endif
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#include <sys/types.h>
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#include <sys/bootblock.h>
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#include <sys/disklabel_gpt.h>
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#include <err.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <prop/proplib.h>
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#include "map.h"
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#include "gpt.h"
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#include "gpt_private.h"
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static int cmd_restore(gpt_t, int, char *[]);
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static const char *restorehelp[] = {
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"[-F] [-i infile]",
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};
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struct gpt_cmd c_restore = {
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"restore",
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cmd_restore,
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restorehelp, __arraycount(restorehelp),
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GPT_SYNC,
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};
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#define usage() gpt_usage(NULL, &c_restore)
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#define PROP_ERR(x) if (!(x)) { \
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gpt_warnx(gpt, "proplib failure"); \
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return -1; \
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}
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#define prop_uint(a) (u_int)prop_number_unsigned_integer_value(a)
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#define prop_uint16_t(a) (uint16_t)prop_number_unsigned_integer_value(a)
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#define prop_uint8_t(a) (uint8_t)prop_number_unsigned_integer_value(a)
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static int
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restore_mbr(gpt_t gpt, struct mbr *mbr, prop_dictionary_t mbr_dict, off_t last)
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{
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unsigned int i;
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prop_number_t propnum;
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struct mbr_part *part;
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propnum = prop_dictionary_get(mbr_dict, "index");
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PROP_ERR(propnum);
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i = prop_uint(propnum);
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propnum = prop_dictionary_get(mbr_dict, "flag");
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PROP_ERR(propnum);
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part = &mbr->mbr_part[i];
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part->part_flag = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "start_head");
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PROP_ERR(propnum);
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part->part_shd = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "start_sector");
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PROP_ERR(propnum);
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part->part_ssect = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "start_cylinder");
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PROP_ERR(propnum);
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part->part_scyl = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "type");
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PROP_ERR(propnum);
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part->part_typ = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "end_head");
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PROP_ERR(propnum);
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part->part_ehd = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "end_sector");
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PROP_ERR(propnum);
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part->part_esect = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "end_cylinder");
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PROP_ERR(propnum);
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part->part_ecyl = prop_uint8_t(propnum);
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propnum = prop_dictionary_get(mbr_dict, "lba_start_low");
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PROP_ERR(propnum);
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part->part_start_lo = htole16(prop_uint16_t(propnum));
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propnum = prop_dictionary_get(mbr_dict, "lba_start_high");
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PROP_ERR(propnum);
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part->part_start_hi = htole16(prop_uint16_t(propnum));
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/* adjust PMBR size to size of device */
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if (part->part_typ == MBR_PTYPE_PMBR) {
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if (last > 0xffffffff) {
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mbr->mbr_part[0].part_size_lo = htole16(0xffff);
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mbr->mbr_part[0].part_size_hi = htole16(0xffff);
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} else {
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mbr->mbr_part[0].part_size_lo = htole16((uint16_t)last);
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mbr->mbr_part[0].part_size_hi = htole16(
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(uint16_t)(last >> 16));
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}
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} else {
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propnum = prop_dictionary_get(mbr_dict, "lba_size_low");
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PROP_ERR(propnum);
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part->part_size_lo = htole16(prop_uint16_t(propnum));
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propnum = prop_dictionary_get(mbr_dict, "lba_size_high");
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PROP_ERR(propnum);
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part->part_size_hi = htole16(prop_uint16_t(propnum));
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}
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return 0;
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}
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static int
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restore_ent(gpt_t gpt, prop_dictionary_t gpt_dict, void *secbuf, u_int gpt_size,
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u_int entries)
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{
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unsigned int i;
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struct gpt_ent ent;
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const char *s;
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prop_string_t propstr;
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prop_number_t propnum;
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memset(&ent, 0, sizeof(ent));
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propstr = prop_dictionary_get(gpt_dict, "type");
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PROP_ERR(propstr);
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s = prop_string_cstring_nocopy(propstr);
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if (gpt_uuid_parse(s, ent.ent_type) != 0) {
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gpt_warnx(gpt, "%s: not able to convert to an UUID", s);
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return -1;
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}
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propstr = prop_dictionary_get(gpt_dict, "guid");
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PROP_ERR(propstr);
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s = prop_string_cstring_nocopy(propstr);
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if (gpt_uuid_parse(s, ent.ent_guid) != 0) {
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gpt_warnx(gpt, "%s: not able to convert to an UUID", s);
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return -1;
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}
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propnum = prop_dictionary_get(gpt_dict, "start");
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PROP_ERR(propnum);
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ent.ent_lba_start = htole64(prop_uint(propnum));
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propnum = prop_dictionary_get(gpt_dict, "end");
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PROP_ERR(propnum);
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ent.ent_lba_end = htole64(prop_uint(propnum));
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propnum = prop_dictionary_get(gpt_dict, "attributes");
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PROP_ERR(propnum);
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ent.ent_attr = htole64(prop_uint(propnum));
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propstr = prop_dictionary_get(gpt_dict, "name");
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if (propstr != NULL) {
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s = prop_string_cstring_nocopy(propstr);
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utf8_to_utf16((const uint8_t *)s, ent.ent_name,
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__arraycount(ent.ent_name));
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}
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propnum = prop_dictionary_get(gpt_dict, "index");
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PROP_ERR(propnum);
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i = prop_uint(propnum);
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if (i > entries) {
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gpt_warnx(gpt, "Entity index out of bounds %u > %u\n",
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i, entries);
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return -1;
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}
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memcpy((char *)secbuf + gpt->secsz + ((i - 1) * sizeof(ent)),
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&ent, sizeof(ent));
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return 0;
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}
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static int
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restore(gpt_t gpt, const char *infile, int force)
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{
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gpt_uuid_t gpt_guid, uuid;
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off_t firstdata, last, lastdata, gpe_start, gpe_end;
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map_t map;
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struct mbr *mbr;
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struct gpt_hdr *hdr;
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unsigned int i, gpt_size;
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prop_dictionary_t props, gpt_dict, mbr_dict, type_dict;
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prop_object_iterator_t propiter;
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prop_data_t propdata;
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prop_array_t mbr_array, gpt_array;
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prop_number_t propnum;
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prop_string_t propstr;
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unsigned int entries;
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const char *s;
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void *secbuf = NULL;;
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int rv = -1;
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last = gpt->mediasz / gpt->secsz - 1LL;
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if (map_find(gpt, MAP_TYPE_PRI_GPT_HDR) != NULL ||
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map_find(gpt, MAP_TYPE_SEC_GPT_HDR) != NULL) {
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if (!force) {
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gpt_warnx(gpt, "Device contains a GPT");
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return -1;
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}
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}
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map = map_find(gpt, MAP_TYPE_MBR);
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if (map != NULL) {
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if (!force) {
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gpt_warnx(gpt, "Device contains an MBR");
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return -1;
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}
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/* Nuke the MBR in our internal map. */
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map->map_type = MAP_TYPE_UNUSED;
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}
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props = prop_dictionary_internalize_from_file(
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strcmp(infile, "-") == 0 ? "/dev/stdin" : infile);
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if (props == NULL) {
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gpt_warnx(gpt, "Unable to read/parse backup file");
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return -1;
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}
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propnum = prop_dictionary_get(props, "sector_size");
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PROP_ERR(propnum);
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if (!prop_number_equals_integer(propnum, gpt->secsz)) {
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gpt_warnx(gpt, "Sector size does not match backup");
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prop_object_release(props);
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return -1;
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}
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gpt_dict = prop_dictionary_get(props, "GPT_HDR");
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PROP_ERR(gpt_dict);
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propnum = prop_dictionary_get(gpt_dict, "revision");
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PROP_ERR(propnum);
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if (!prop_number_equals_unsigned_integer(propnum, 0x10000)) {
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gpt_warnx(gpt, "backup is not revision 1.0");
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prop_object_release(gpt_dict);
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prop_object_release(props);
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return -1;
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}
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propnum = prop_dictionary_get(gpt_dict, "entries");
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PROP_ERR(propnum);
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entries = prop_uint(propnum);
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gpt_size = (u_int)(entries * sizeof(struct gpt_ent) / gpt->secsz);
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if (gpt_size * sizeof(struct gpt_ent) % gpt->secsz)
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gpt_size++;
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propstr = prop_dictionary_get(gpt_dict, "guid");
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PROP_ERR(propstr);
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s = prop_string_cstring_nocopy(propstr);
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if (gpt_uuid_parse(s, gpt_guid) != 0) {
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gpt_warnx(gpt, "%s: not able to convert to an UUID", s);
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goto out;
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}
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firstdata = gpt_size + 2; /* PMBR and GPT header */
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lastdata = last - gpt_size - 1; /* alt. GPT table and header */
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type_dict = prop_dictionary_get(props, "GPT_TBL");
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PROP_ERR(type_dict);
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gpt_array = prop_dictionary_get(type_dict, "gpt_array");
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PROP_ERR(gpt_array);
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propiter = prop_array_iterator(gpt_array);
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PROP_ERR(propiter);
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while ((gpt_dict = prop_object_iterator_next(propiter)) != NULL) {
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propstr = prop_dictionary_get(gpt_dict, "type");
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PROP_ERR(propstr);
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s = prop_string_cstring_nocopy(propstr);
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if (gpt_uuid_parse(s, uuid) != 0) {
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gpt_warnx(gpt, "%s: not able to convert to an UUID", s);
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goto out;
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}
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if (gpt_uuid_is_nil(uuid))
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continue;
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propnum = prop_dictionary_get(gpt_dict, "start");
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PROP_ERR(propnum);
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gpe_start = prop_uint(propnum);
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propnum = prop_dictionary_get(gpt_dict, "end");
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PROP_ERR(propnum);
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gpe_end = prop_uint(propnum);
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if (gpe_start < firstdata || gpe_end > lastdata) {
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gpt_warnx(gpt, "Backup GPT doesn't fit");
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goto out;
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}
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}
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prop_object_iterator_release(propiter);
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/* GPT TABLE + GPT HEADER */
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if ((secbuf = calloc(gpt_size + 1, gpt->secsz)) == NULL) {
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gpt_warn(gpt, "not enough memory to create a sector buffer");
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goto out;
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}
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if (lseek(gpt->fd, 0LL, SEEK_SET) == -1) {
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gpt_warn(gpt, "Can't seek to beginning");
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goto out;
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}
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for (i = 0; i < firstdata; i++) {
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if (write(gpt->fd, secbuf, gpt->secsz) != (ssize_t)gpt->secsz) {
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gpt_warn(gpt, "Error writing");
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goto out;
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}
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}
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if (lseek(gpt->fd, (lastdata + 1) * gpt->secsz, SEEK_SET) == -1) {
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gpt_warn(gpt, "Can't seek to end");
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goto out;
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}
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for (i = (u_int)(lastdata + 1); i <= (u_int)last; i++) {
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if (write(gpt->fd, secbuf, gpt->secsz) != (ssize_t)gpt->secsz) {
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gpt_warn(gpt, "Error writing");
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goto out;
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}
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}
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mbr = secbuf;
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type_dict = prop_dictionary_get(props, "MBR");
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PROP_ERR(type_dict);
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propdata = prop_dictionary_get(type_dict, "code");
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PROP_ERR(propdata);
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memcpy(mbr->mbr_code, prop_data_data_nocopy(propdata),
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sizeof(mbr->mbr_code));
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mbr_array = prop_dictionary_get(type_dict, "mbr_array");
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PROP_ERR(mbr_array);
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propiter = prop_array_iterator(mbr_array);
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PROP_ERR(propiter);
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while ((mbr_dict = prop_object_iterator_next(propiter)) != NULL) {
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if (restore_mbr(gpt, mbr, mbr_dict, last) == -1)
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goto out;
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}
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prop_object_iterator_release(propiter);
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mbr->mbr_sig = htole16(MBR_SIG);
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if (lseek(gpt->fd, 0LL, SEEK_SET) == -1 ||
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write(gpt->fd, mbr, gpt->secsz) != (ssize_t)gpt->secsz) {
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gpt_warn(gpt, "Unable to seek/write MBR");
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return -1;
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}
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propiter = prop_array_iterator(gpt_array);
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PROP_ERR(propiter);
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while ((gpt_dict = prop_object_iterator_next(propiter)) != NULL) {
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if (restore_ent(gpt, gpt_dict, secbuf, gpt_size, entries) == -1)
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goto out;
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}
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prop_object_iterator_release(propiter);
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size_t len = gpt_size * gpt->secsz;
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if (lseek(gpt->fd, 2 * gpt->secsz, SEEK_SET) == -1 ||
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write(gpt->fd, (char *)secbuf + gpt->secsz, len) != (ssize_t) len) {
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gpt_warn(gpt, "Unable to write primary GPT");
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goto out;
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}
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if (lseek(gpt->fd, (lastdata + 1) * gpt->secsz, SEEK_SET) == -1 ||
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write(gpt->fd, (char *)secbuf + gpt->secsz, len) != (ssize_t) len) {
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gpt_warn(gpt, "Unable to write secondary GPT");
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goto out;
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}
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memset(secbuf, 0, gpt->secsz);
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hdr = secbuf;
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memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig));
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hdr->hdr_revision = htole32(GPT_HDR_REVISION);
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hdr->hdr_size = htole32(GPT_HDR_SIZE);
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hdr->hdr_lba_self = htole64(GPT_HDR_BLKNO);
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hdr->hdr_lba_alt = htole64((uint64_t)last);
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hdr->hdr_lba_start = htole64((uint64_t)firstdata);
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hdr->hdr_lba_end = htole64((uint64_t)lastdata);
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gpt_uuid_copy(hdr->hdr_guid, gpt_guid);
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hdr->hdr_lba_table = htole64(2);
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hdr->hdr_entries = htole32(entries);
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hdr->hdr_entsz = htole32(sizeof(struct gpt_ent));
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hdr->hdr_crc_table = htole32(crc32((char *)secbuf + gpt->secsz, len));
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hdr->hdr_crc_self = htole32(crc32(hdr, GPT_HDR_SIZE));
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if (lseek(gpt->fd, gpt->secsz, SEEK_SET) == -1 ||
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write(gpt->fd, hdr, gpt->secsz) != (ssize_t)gpt->secsz) {
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gpt_warn(gpt, "Unable to write primary header");
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goto out;
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}
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hdr->hdr_lba_self = htole64((uint64_t)last);
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hdr->hdr_lba_alt = htole64(GPT_HDR_BLKNO);
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hdr->hdr_lba_table = htole64((uint64_t)(lastdata + 1));
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hdr->hdr_crc_self = 0;
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hdr->hdr_crc_self = htole32(crc32(hdr, GPT_HDR_SIZE));
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if (lseek(gpt->fd, last * gpt->secsz, SEEK_SET) == -1 ||
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write(gpt->fd, hdr, gpt->secsz) != (ssize_t)gpt->secsz) {
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gpt_warn(gpt, "Unable to write secondary header");
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goto out;
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}
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rv = 0;
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out:
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free(secbuf);
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prop_object_release(props);
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return rv;
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}
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static int
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cmd_restore(gpt_t gpt, int argc, char *argv[])
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{
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int ch;
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int force = 0;
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const char *infile = "-";
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while ((ch = getopt(argc, argv, "Fi:")) != -1) {
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switch(ch) {
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case 'i':
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infile = optarg;
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break;
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case 'F':
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force = 1;
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break;
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default:
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return usage();
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}
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}
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|
|
|
if (argc != optind)
|
|
return usage();
|
|
|
|
return restore(gpt, infile, force);
|
|
}
|