vfs.c File Reference

#include "vfs.h"
#include "../../drivers/ahci/ahci.h"
#include "../fat32/fat32.h"
#include "../../includes/macros.h"

Go to the source code of this file.

Data Structures
struct	MOUNTED_FS

Macros
#define	MAX_MOUNTS   4
#define	MAIN_FS_DEVICE   0

Typedefs
typedef struct MOUNTED_FS	MOUNTED_FS

Functions
MTSTATUS	vfs_init (void)
	Initialize the Virtual File System (initializes other filesystem needed services as well)
MTSTATUS	vfs_read (const char *filename, uint32_t *file_size_out, void **buffer_out)
	Reads the file into a buffer.
MTSTATUS	vfs_write (const char *path, const void *data, uint32_t size, FS_WRITE_MODES write_mode)
	Creates a new file (or opens existing) and writes data to it.
MTSTATUS	vfs_delete (const char *path)
	This function deletes the file given to the function from the system.
MTSTATUS	vfs_listdir (const char *path, char *listings, size_t max_len)
	Lists the directory given.
MTSTATUS	vfs_mkdir (const char *path)
	Creates a new directory.
MTSTATUS	vfs_rmdir (const char *path)
	This function deletes the directory given to the function from the system along with its file (marks as deleted).
bool	vfs_is_dir_empty (const char *path)
	This function returns if the directory given to the function is empty (e.g, has only '.' and '..' entries / is nonexistent / is deleted)
void	vfs_listrootdir (void)
	This function will list the root directory of the main mount device.

Variables
FS_DRIVER	fat32_driver

Macro Definition Documentation

MAIN_FS_DEVICE

#define MAIN_FS_DEVICE   0

Definition at line 23 of file vfs.c.

MAX_MOUNTS

#define MAX_MOUNTS   4

Definition at line 19 of file vfs.c.

Typedef Documentation

MOUNTED_FS

typedef struct MOUNTED_FS MOUNTED_FS

Function Documentation

vfs_delete()

MTSTATUS vfs_delete

(

const char *

path

)

This function deletes the file given to the function from the system.

Parameters

path	Full path to delete file.

Returns

MTSTATUS Status code.

Definition at line 101 of file vfs.c.

vfs_init()

MTSTATUS vfs_init

(

void

)

Initialize the Virtual File System (initializes other filesystem needed services as well)

Returns

MTSTATUS Status Code

Definition at line 42 of file vfs.c.

vfs_is_dir_empty()

bool vfs_is_dir_empty

(

const char *

path

)

This function returns if the directory given to the function is empty (e.g, has only '.' and '..' entries / is nonexistent / is deleted)

Parameters

path	Full path to dir

Returns

True or false based if empty or not.

Definition at line 129 of file vfs.c.

vfs_listdir()

MTSTATUS vfs_listdir	(	const char *	path,
		char *	listings,
		size_t	max_len )

Lists the directory given.

Parameters

path	Path to directory, e.g "mydir/"
listings	[OUT] Pointer to directory listing. (each seperated with a newline character)
max_len	[IN] Max size of listings buffer.

Returns

MTSTATUS Status code.

Definition at line 108 of file vfs.c.

vfs_listrootdir()

void vfs_listrootdir

(

void

)

This function will list the root directory of the main mount device.

Definition at line 136 of file vfs.c.

vfs_mkdir()

MTSTATUS vfs_mkdir

(

const char *

path

)

Creates a new directory.

Parameters

path	The full path to the new directory

Returns

MTSTATUS Status code.

Definition at line 115 of file vfs.c.

vfs_read()

MTSTATUS vfs_read	(	const char *	filename,
		uint32_t *	file_size_out,
		void **	buffer_out )

Reads the file into a buffer.

Parameters

filename	The Filename to read, e.g "file.txt" or "tmp/folder/myfile.txt"
file_size_out	A pointer to put the file size in bytes
bufferOut	A pointer to put the file buffer in (doesn't need to be dynamically allocated)

Returns

MTSTATUS Status Code.

Definition at line 87 of file vfs.c.

vfs_rmdir()

MTSTATUS vfs_rmdir

(

const char *

path

)

This function deletes the directory given to the function from the system along with its file (marks as deleted).

Parameters

path	Full path to delete directory.

Returns

MTSTATUS Status code.

Definition at line 122 of file vfs.c.

vfs_write()

MTSTATUS vfs_write	(	const char *	path,
		const void *	data,
		uint32_t	size,
		FS_WRITE_MODES	write_mode )

Creates a new file (or opens existing) and writes data to it.

Parameters

path	The full path of the file to create
data	A pointer to the data to write.
size	The number of bytes to write
write_mode	Whether to APPEND or CREATE/REPLACE the file. (in FS_WRITE_MODES enum)

Returns

MTSTATUS Status Code

Definition at line 94 of file vfs.c.

Variable Documentation

fat32_driver

FS_DRIVER fat32_driver

Initial value:

= {
    .init = fat32_fs_init,
    .read = fat32_read_file,
    .write = fat32_write_file,
    .delete = fat32_delete_file,
    .listdir = fat32_list_directory,
    .mkdir = fat32_create_directory,
    .rmdir = fat32_delete_directory,
    .is_dir_empty = fat32_directory_is_empty,
    .listrootdir = fat32_list_root,
}

Definition at line 30 of file vfs.c.