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/*
File: file_ibd.c
Copyright (C) 2015 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_ibd)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
#include "log.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_ibd(file_stat_t *file_stat);
const file_hint_t file_hint_ibd= {
.extension="ibd",
.description="InnoDB database file",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_ibd
};
#define FSP_HEADER_OFFSET 38
#define FSP_SPACE_FLAGS 16 /* fsp_space_t.flags, similar to dict_table_t::flags */
#define FIL_PAGE_TYPE_FSP_HDR 8 /* File space header */
#define DICT_TF_BITS 6 /* number of flag bits */
#define DICT_TF_FORMAT_SHIFT 5 /* file format */
#ifdef DISABLED_FOR_FRAMAC
#define DICT_TF_FORMAT_MASK 0x20
#else
#define DICT_TF_FORMAT_MASK \
((~(~0U << (DICT_TF_BITS - DICT_TF_FORMAT_SHIFT))) << DICT_TF_FORMAT_SHIFT)
#endif
#define DICT_TF_FORMAT_ZIP 1 /* InnoDB plugin for 5.1: compressed tables */
struct innodb_fil_header
{
uint32_t space_or_chksum;
uint32_t offset;
uint32_t prev;
uint32_t next;
uint64_t lsn;
uint16_t type;
uint64_t file_flush_lsn;
uint32_t arch_log_no_or_space_id;
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct innodb_fil_header);
@ requires buffer_size > FSP_HEADER_OFFSET + FSP_SPACE_FLAGS;
@ requires separation: \separated(&file_hint_ibd, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_ibd(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
const struct innodb_fil_header *hdr=(const struct innodb_fil_header *)buffer;
const uint32_t *flags_ptr=(const uint32_t *)&buffer[FSP_HEADER_OFFSET + FSP_SPACE_FLAGS];
const uint32_t flags=be32(*flags_ptr);
if(be16(hdr->type)==0)
{
/* Antelope (pre-5.1.7) */
if(flags==0)
return 0;
}
else if(be16(hdr->type)==FIL_PAGE_TYPE_FSP_HDR)
{
const unsigned int format = (flags & DICT_TF_FORMAT_MASK) >> DICT_TF_FORMAT_SHIFT;
if(flags==0)
{
/* Antelope (5.1.7 or newer) */
}
else if(format==DICT_TF_FORMAT_ZIP)
{
/* Barracuda */
}
else
return 0;
}
else
return 0;
if(buffer_size >= 0xc078 && memcmp(&buffer[0xc070], "supremum", 8)!=0)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_ibd.extension;
file_recovery_new->min_filesize=0xc078;
return 1;
}
static void register_header_check_ibd(file_stat_t *file_stat)
{
register_header_check(0xc063, "infimum", 7, &header_check_ibd, file_stat);
}
#endif
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