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/*
File: file_dump.c
Copyright (C) 2007 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the tedumps 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_dump)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "filegen.h"
#define TS_TAPE 1 /* dump tape header */
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_dump(file_stat_t *file_stat);
const file_hint_t file_hint_dump= {
.extension="dump",
.description="Dump/Restore archive",
.max_filesize=(((uint64_t)1<<33)-1),
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_dump
};
/*
* TP_BSIZE is the size of file blocks on the dump tapes.
* Note that TP_BSIZE must be a multiple of DEV_BSIZE.
*
* NTREC is the number of TP_BSIZE blocks that are written
* in each tape record. HIGHDENSITYTREC is the number of
* TP_BSIZE blocks that are written in each tape record on
* 6250 BPI or higher density tapes.
*
* TP_NINDIR is the number of indirect pointers in a TS_INODE
* or TS_ADDR record. Note that it must be a power of two.
*/
#define TP_BSIZE 1024
#define NTREC 10
#define HIGHDENSITYTREC 32
#define TP_NINDIR (TP_BSIZE/2)
#define LBLSIZE 16
#define NAMELEN 64
struct dump_struct
{
int32_t c_type; /* record type (see below) */
int32_t c_old_date; /* date of this dump */
int32_t c_old_ddate; /* date of previous dump */
int32_t c_volume; /* dump volume number */
int32_t c_old_tapea; /* logical block of this record */
uint32_t c_inumber; /* number of inode */
int32_t c_magic; /* magic number (see above) */
int32_t c_checksum; /* record checksum */
/*
* Start old dinode structure, expanded for binary
* compatibility with UFS1.
*/
uint16_t c_mode; /* file mode */
int16_t c_spare1[3]; /* old nlink, ids */
uint64_t c_size; /* file byte count */
int32_t c_old_atime; /* old last access time, seconds */
int32_t c_atimensec; /* last access time, nanoseconds */
int32_t c_old_mtime; /* old last modified time, secs */
int32_t c_mtimensec; /* last modified time, nanosecs */
int32_t c_spare2[2]; /* old ctime */
int32_t c_rdev; /* for devices, device number */
int32_t c_birthtimensec; /* creation time, nanosecs */
int64_t c_birthtime; /* creation time, seconds */
int64_t c_atime; /* last access time, seconds */
int64_t c_mtime; /* last modified time, seconds */
int32_t c_spare4[7]; /* old block pointers */
uint32_t c_file_flags; /* status flags (chflags) */
int32_t c_spare5[2]; /* old blocks, generation number */
uint32_t c_uid; /* file owner */
uint32_t c_gid; /* file group */
int32_t c_spare6[2]; /* previously unused spares */
/*
* End old dinode structure.
*/
int32_t c_count; /* number of valid c_addr entries */
char c_addr[TP_NINDIR]; /* 1 => data; 0 => hole in inode */
char c_label[LBLSIZE]; /* dump label */
int32_t c_level; /* level of this dump */
char c_filesys[NAMELEN]; /* name of dumpped file system */
char c_dev[NAMELEN]; /* name of dumpped device */
char c_host[NAMELEN]; /* name of dumpped host */
int32_t c_flags; /* additional information */
int32_t c_old_firstrec; /* first record on volume */
int64_t c_date; /* date of this dump */
int64_t c_ddate; /* date of previous dump */
int64_t c_tapea; /* logical block of this record */
int64_t c_firstrec; /* first record on volume */
int32_t c_spare[24]; /* reserved for future uses */
};
/*
* special record types
*/
#define TS_TAPE 1 /* dump tape header */
#define TS_INODE 2 /* beginning of file record */
#define TS_ADDR 4 /* continuation of file record */
#define TS_BITS 3 /* map of inodes on tape */
#define TS_CLRI 6 /* map of inodes deleted since last dump */
#define TS_END 5 /* end of volume marker */
/*@
@ requires buffer_size >= sizeof(struct dump_struct);
@ requires separation: \separated(&file_hint_dump, 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_dump(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 dump_struct *dump=(const struct dump_struct*)buffer;
if(le32(dump->c_type)!=TS_TAPE)
return 0;
reset_file_recovery(file_recovery_new);
#ifdef DJGPP
file_recovery_new->extension="dmp";
#else
file_recovery_new->extension=file_hint_dump.extension;
#endif
file_recovery_new->time=le32(dump->c_old_date);
return 1;
}
static void register_header_check_dump(file_stat_t *file_stat)
{
static const unsigned char dump_header_le_old_fs[4] = { 0x6b, 0xea, 0x00, 0x00};
static const unsigned char dump_header_le_new_fs[4] = { 0x6c, 0xea, 0x00, 0x00};
register_header_check(0x18, dump_header_le_old_fs,sizeof(dump_header_le_old_fs), &header_check_dump, file_stat);
#ifndef DISABLED_FOR_FRAMAC
register_header_check(0x18, dump_header_le_new_fs,sizeof(dump_header_le_new_fs), &header_check_dump, file_stat);
#endif
}
#endif
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