filesys.c File Reference

#include "filesys/filesys.h"
#include <debug.h>
#include <stdio.h>
#include <string.h>
#include "filesys/file.h"
#include "filesys/free-map.h"
#include "filesys/inode.h"
#include "filesys/directory.h"

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Functions
static void	do_format (void)
	Formats the file system. More...
void	filesys_init (bool format)
	Initializes the file system module. More...
void	filesys_done (void)
	Shuts down the file system module, writing any unwritten data to disk. More...
bool	filesys_create (const char *name, off_t initial_size)
	Creates a file named NAME with the given INITIAL_SIZE. More...
struct file *	filesys_open (const char *name)
	Opens the file with the given NAME. More...
bool	filesys_remove (const char *name)
	Deletes the file named NAME. More...

Variables
struct block *	fs_device
	Partition that contains the file system. More...

Function Documentation

do_format()

static void do_format ( void  )

static

Formats the file system.

Definition at line 95 of file filesys.c.

References dir_create(), free_map_close(), free_map_create(), PANIC, printf(), and ROOT_DIR_SECTOR.

Referenced by filesys_init().

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filesys_create()

bool filesys_create	(	const char *	name,
		off_t	initial_size
	)

Creates a file named NAME with the given INITIAL_SIZE.

Returns true if successful, false otherwise. Fails if a file named NAME already exists, or if internal memory allocation fails.

Definition at line 46 of file filesys.c.

References dir_add(), dir_close(), dir_open_root(), free_map_allocate(), free_map_release(), inode_create(), name, and NULL.

Referenced by fsutil_extract().

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filesys_done()

void filesys_done

(

void

)

Shuts down the file system module, writing any unwritten data to disk.

Definition at line 36 of file filesys.c.

References free_map_close().

Referenced by shutdown_power_off().

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filesys_init()

void filesys_init

(

bool

format

)

Initializes the file system module.

If FORMAT is true, reformats the file system.

Definition at line 18 of file filesys.c.

References BLOCK_FILESYS, block_get_role(), do_format(), free_map_init(), free_map_open(), fs_device, inode_init(), NULL, and PANIC.

Referenced by pintos_init().

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filesys_open()

struct file * filesys_open

(

const char *

name

)

Opens the file with the given NAME.

Returns the new file if successful or a null pointer otherwise. Fails if no file named NAME exists, or if an internal memory allocation fails.

Definition at line 67 of file filesys.c.

References dir_close(), dir_lookup(), dir_open_root(), file_open(), name, and NULL.

Referenced by fsutil_append(), fsutil_cat(), fsutil_extract(), and load().

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filesys_remove()

bool filesys_remove

(

const char *

name

)

Deletes the file named NAME.

filesys/filesys.h

Returns true if successful, false on failure. Fails if no file named NAME exists, or if an internal memory allocation fails.

Definition at line 84 of file filesys.c.

References dir_close(), dir_open_root(), dir_remove(), name, and NULL.

Referenced by fsutil_rm().

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Variable Documentation

fs_device

struct block* fs_device

Partition that contains the file system.

Definition at line 11 of file filesys.c.

Referenced by filesys_init(), free_map_init(), inode_create(), inode_open(), inode_read_at(), and inode_write_at().