fsLow.h

// Start Partition System
//
// This is the first function to call before your filesystem starts
// If the filename already exists, then the input values stored in 
// volSize and blockSize are ignored.  If the file does not exist, it will 
// be created to the specified volume size in units of the block size
// (must be power of 2) plus one for the partition header.
//
// On return 
// 		return value 0 = success;
//		return value -1 = file exists but can not open for write
//		return value -2 = insufficient space for the volume		
//		volSize will be filled with the volume size
//		blockSize will be filled with the block size
#ifndef uint64_t
typedef u_int64_t uint64_t;
#endif
#ifndef uint32_t
typedef u_int32_t uint32_t;
#endif
typedef unsigned long long ull_t;



int startPartitionSystem (char * filename, uint64_t * volSize, uint64_t * blockSize);

int closePartitionSystem ();

int initFileSystem (uint64_t numberOfBlocks, uint64_t blockSize);
void exitFileSystem ();

uint64_t LBAwrite (void * buffer, uint64_t lbaCount, uint64_t lbaPosition);

uint64_t LBAread (void * buffer, uint64_t lbaCount, uint64_t lbaPosition);

void runFSLowTest();  //Do not use this, for testing only

#define MINBLOCKSIZE 512
#define PART_SIGNATURE	0x526F626572742042
#define PART_SIGNATURE2	0x4220747265626F52
#define PART_CAPTION "CSC-415 - Operating Systems File System Partition Header\n\n"

#define	PART_ACTIVE 		1
#define	PART_INACTIVE 		0

#define	PART_NOERROR 		0
#define PART_ERR_INVALID	-4