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/***************************************************************************
* Copyright (C) 2010 by Roberto Maar *
* robi@users.berlios.de *
* *
* This program 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 to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef JOURNAL_H
#define JOURNAL_H
//struct for cache the descriptor data
typedef struct journal_descriptor_tag_s
{
blk64_t f_blocknr; /* The on-disk block number */
__u32 j_blocknr; /* The on-journal block number */
__u32 transaction; /* Transaction Sequence*/
} journal_descriptor_tag_t;
//struct for cache the block bitmap data
typedef struct journal_bitmap_tag_s
{
blk64_t blockgroup; /* The blockgroup of bitmap */
__u32 j_blocknr; /* The on-journal block number */
__u32 transaction; /* Transaction Sequence*/
} journal_bitmap_tag_t;
//head struct for collect the Block Bitmaps of Journal
struct j_bitmap_list_t
{
int count;
journal_bitmap_tag_t *list;
__u32 groups;
__u32 first_trans;
__u32 last_trans;
journal_bitmap_tag_t *pointer;
unsigned int blocksize ;
unsigned int blocklen ;
unsigned int last_blocklen ;
char* block_buf;
};
void dump_journal_superblock( void); //print journal superblock
extern int journal_open(char* , int );// open an extract the blocklist from journal
extern int journal_close(void); // close the journal (last function in main() if the journal open)
static int init_journal(void); // main for extract the journal to the local private data
static const char *type_to_name(int);
int get_block_list_count(blk64_t);//get count of journal blocklist
__u32 get_trans_time( __u32); //get the transactiontime of a transactionnumber
int get_block_list(journal_descriptor_tag_t*, blk64_t, int);//get a sortet list of all copys of a filesystemblock
int read_journal_block(off_t, char*, int, unsigned int*);
void print_block_list(int);
int dump_journal_block( __u32 , int );
void print_block_transaction(blk64_t,int);//print all transactions for a fs-block
__u32 get_journal_blocknr(blk64_t, __u32);// get the last dir-block for transaction from journal or if not found the real block
int get_last_block(char*, blk_t*, __u32, __u32);// get the last dir-block for transaction from journal or if not, found the real block
int get_block_bitmap_list( journal_bitmap_tag_t**);//get a list of all copies of blockbitmap from journal
int init_block_bitmap_list(ext2fs_block_bitmap* , __u32); //create and init the the journal block bitmap
void clear_block_bitmap_list(ext2fs_block_bitmap); //destroy the journal block bitmap
int next_block_bitmap(ext2fs_block_bitmap); //produces a differential block bitmap for a transaction from the Journal
#endif
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