/*
 * cow.h
 *
 *  Created on: 22.08.2018
 *      Author: michael
 */

#ifndef COW_H_
#define COW_H_
#include <stddef.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "../shared/fdsignal.h"

typedef struct cow_request{
	struct cow_request *next;
	off_t offset;
	off_t end;
	struct cow_request *dependencies[6];
	struct cow_request *myDependencies[6];
	dnbd3_signal_t* signal;
}cow_request;

bool create_cow_file(char *cow_path, char *image_Name,uint64_t imageSize);
bool createBigBlock(unsigned long id);
void onClose();
cow_request getAccess(off_t offset,size_t size);
void closeAcccess(cow_request *request);
int write_cow(const char *data, size_t size, off_t offset);

int writeToBigBlock(unsigned long bigBlockId,const char *data, off_t offset,size_t size);
int getSmallBlockId(off_t offset);
int cow_read(char *buf, size_t size, off_t offset);
int readBigBlock(long bigBlockId ,char *buf,size_t size, off_t offset);
void test();


#endif /* COW_H_ */