descriptors_table.h File Reference

Contains descriptors_table struct and its methods. More...

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

Go to the source code of this file.

Functions
struct	__attribute__ ((__packed__)) descriptors_table
	Struct for represent DT Contains all information about descriptor table.
void	init_descriptors_table (struct descriptors_table *descriptors_table, const struct superblock *superblock)
	Constructor of descriptors_table Init descriptors table with metadata from superblock. More...
void	destruct_descriptors_table (struct descriptors_table *descriptors_table, const struct superblock *superblock)
	Destructor of superblock. More...
ssize_t	read_descriptors_table (int fd, struct descriptors_table *descriptors_table, const struct superblock *superblock)
	Read descriptors_table from memory. More...
ssize_t	write_descriptor_table (int fd, struct descriptors_table *descriptors_table, const struct superblock *superblock)
	Write descriptors_table to memory. More...
int	reserve_descriptor (struct descriptors_table *descriptors_table, uint16_t inode_id, const struct superblock *superblock)
	Occupy descriptor for inode_id. More...
int	free_descriptor (struct descriptors_table *descriptors_table, uint16_t fd, const struct superblock *superblock)
	Release descriptor for inode_id. More...
uint16_t	sizeof_descriptors_table (const struct superblock *superblock)
	Sizeof descriptors_table. More...

Detailed Description

Contains descriptors_table struct and its methods.

Author

yaishenka

Date

13.03.2021

Definition in file descriptors_table.h.

Function Documentation

void destruct_descriptors_table	(	struct descriptors_table *	descriptors_table,
		const struct superblock *	superblock
	)

Destructor of superblock.

Parameters

descriptors_table
superblock

Definition at line 23 of file descriptors_table.c.

int free_descriptor	(	struct descriptors_table *	descriptors_table,
		uint16_t	fd,
		const struct superblock *	superblock
	)

Release descriptor for inode_id.

Parameters

descriptors_table
fd	fd to release
superblock

Returns

d if all ok; -1 otherwise

Definition at line 126 of file descriptors_table.c.

void init_descriptors_table	(	struct descriptors_table *	descriptors_table,
		const struct superblock *	superblock
	)

Constructor of descriptors_table Init descriptors table with metadata from superblock.

Parameters

descriptors_table
superblock

Author

yaishenka

Date

12.03.2021

Definition at line 11 of file descriptors_table.c.

ssize_t read_descriptors_table	(	int	fd,
		struct descriptors_table *	descriptors_table,
		const struct superblock *	superblock
	)

Read descriptors_table from memory.

Parameters

fd	opened fd
descriptors_table
superblock

Returns

sizeof(descriptor_table) of reading is ok; -1 otherwise and destruct descriptors_table

Definition at line 30 of file descriptors_table.c.

int reserve_descriptor	(	struct descriptors_table *	descriptors_table,
		uint16_t	inode_id,
		const struct superblock *	superblock
	)

Occupy descriptor for inode_id.

Parameters

descriptors_table
inode_id
superblock

Returns

fd if all ok; -1 otherwise

Definition at line 103 of file descriptors_table.c.

uint16_t sizeof_descriptors_table

(

const struct superblock *

superblock

)

Sizeof descriptors_table.

Parameters

superblock

Returns

Definition at line 141 of file descriptors_table.c.

ssize_t write_descriptor_table	(	int	fd,
		struct descriptors_table *	descriptors_table,
		const struct superblock *	superblock
	)

Write descriptors_table to memory.

Parameters

fd	opened fd
descriptors_table
superblock

Returns

sizeof(descriptor_table) of writing is ok; -1 otherwise

Definition at line 68 of file descriptors_table.c.