block.h File Reference

Contains block struct and its methods. More...

#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include "inode.h"

Go to the source code of this file.

Functions
struct	__attribute__ ((__packed__)) block_record
	Contains information about filename/dirname. More...
void	init_block_record (struct block_record *block_record, const struct superblock *superblock, uint16_t inode_id)
	Constructor of block record Init block record and set its path array to char[max_len_path]. More...
void	destruct_block_record (struct block_record *block_record)
	Destructor of block_record. More...
void	init_block (struct block *block, const struct superblock *superblock, uint16_t block_id, uint16_t inode_id)
	Constructor of block Init block and set its block_records array to nullptr. More...
void	init_block_with_records (struct block *block, const struct superblock *superblock, uint16_t block_id, uint16_t inode_id, uint8_t records_count)
	Constructor of block Init block and set its block_records array to bloc_record[records_count]. More...
void	destruct_block (struct block *block)
	Destructor of block. More...
ssize_t	read_block (int fd, struct block *block, uint16_t block_id, const struct superblock *superblock)
	Read block from memory. More...
ssize_t	write_block (int fd, struct block *block, const struct superblock *superblock)
	Write. More...
uint8_t	get_max_records_count (const struct superblock *superblock)
uint32_t	get_max_data_in_block (const struct superblock *superblock)
uint32_t	get_max_data_size_of_all_blocks (const struct superblock *superblock)
uint32_t	get_remain_data (const struct block *block, const struct superblock *superblock)

Detailed Description

Contains block struct and its methods.

Author

yaishenka

Date

13.03.2021

Definition in file block.h.

Function Documentation

struct __attribute__

(

(__packed__)

)

Contains information about filename/dirname.

Main suberblock struct Contains fs_info and masks for blocks and inodes.

Main inode struct.

Contains information about block.

Contains meta info about block.

Block can contain file data or records about directory

This struct represent inode

Definition at line 18 of file block.h.

void destruct_block

(

struct block *

block

)

Destructor of block.

Parameters

block

Definition at line 118 of file block.c.

void destruct_block_record

(

struct block_record *

block_record

)

Destructor of block_record.

Parameters

block_record

Definition at line 32 of file block.c.

uint32_t get_max_data_in_block

(

const struct superblock *

superblock

)

Parameters

superblock

Returns

max data size in one block

Definition at line 246 of file block.c.

uint32_t get_max_data_size_of_all_blocks

(

const struct superblock *

superblock

)

Parameters

superblock

Returns

max data size in FS

Definition at line 250 of file block.c.

uint8_t get_max_records_count

(

const struct superblock *

superblock

)

Parameters

superblock

Returns

Maximum number of records in a block

Definition at line 241 of file block.c.

uint32_t get_remain_data	(	const struct block *	block,
		const struct superblock *	superblock
	)

Parameters

block
superblock

Returns

remain size of block

Definition at line 255 of file block.c.

void init_block	(	struct block *	block,
		const struct superblock *	superblock,
		uint16_t	block_id,
		uint16_t	inode_id
	)

Constructor of block Init block and set its block_records array to nullptr.

Parameters

block
superblock
block_id
inode_id

Definition at line 94 of file block.c.

void init_block_record	(	struct block_record *	block_record,
		const struct superblock *	superblock,
		uint16_t	inode_id
	)

Constructor of block record Init block record and set its path array to char[max_len_path].

Parameters

block_record
superblock
inode_id	id of inode with associated with dir or file

Definition at line 24 of file block.c.

void init_block_with_records	(	struct block *	block,
		const struct superblock *	superblock,
		uint16_t	block_id,
		uint16_t	inode_id,
		uint8_t	records_count
	)

Constructor of block Init block and set its block_records array to bloc_record[records_count].

Parameters

block
superblock
block_id
inode_id
records_count

Definition at line 107 of file block.c.

ssize_t read_block	(	int	fd,
		struct block *	block,
		uint16_t	block_id,
		const struct superblock *	superblock
	)

Read block from memory.

Parameters

fd
block
block_id
superblock

Returns

sizeof(block) if reading is ok; -1 otherwise and destruct block object

Definition at line 133 of file block.c.

ssize_t write_block	(	int	fd,
		struct block *	block,
		const struct superblock *	superblock
	)

Write.

Parameters

fd
block
superblock

Returns

sizeof(block) if writing is ok; -1 otherwise

Definition at line 189 of file block.c.