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"
#include "devices/disk.h"

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Functions
static void	do_format (void)
void	filesys_init (bool format)
void	filesys_done (void)
bool	filesys_create (const char *name, off_t initial_size)
struct file *	filesys_open (const char *name)
bool	filesys_remove (const char *name)

Variables
struct disk *	filesys_disk

Function Documentation

do_format()

static void do_format ( void  )

static

                 {
    printf ("Formatting file system...");
 
#ifdef EFILESYS
    /* Create FAT and save it to the disk. */
    fat_create ();
    fat_close ();
#else
    free_map_create ();
    if (!dir_create (ROOT_DIR_SECTOR, 16))
        PANIC ("root directory creation failed");
    free_map_close ();
#endif
 
    printf ("done.\n");
}

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filesys_create()

bool filesys_create	(	const char *	name,
		off_t	initial_size
	)

                                                      {
    disk_sector_t inode_sector = 0;
    struct dir *dir = dir_open_root ();
    bool success = (dir != NULL
            && free_map_allocate (1, &inode_sector)
            && inode_create (inode_sector, initial_size)
            && dir_add (dir, name, inode_sector));
    if (!success && inode_sector != 0)
        free_map_release (inode_sector, 1);
    dir_close (dir);
 
    return success;
}

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filesys_done()

void filesys_done

(

void

)

                    {
    /* Original FS */
#ifdef EFILESYS
    fat_close ();
#else
    free_map_close ();
#endif
}

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filesys_init()

void filesys_init

(

bool

format

)

                           {
    filesys_disk = disk_get (0, 1);
    if (filesys_disk == NULL)
        PANIC ("hd0:1 (hdb) not present, file system initialization failed");
 
    inode_init ();
 
#ifdef EFILESYS
    fat_init ();
 
    if (format)
        do_format ();
 
    fat_open ();
#else
    /* Original FS */
    free_map_init ();
 
    if (format)
        do_format ();
 
    free_map_open ();
#endif
}

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filesys_open()

struct file * filesys_open

(

const char *

name

)

                                {
    struct dir *dir = dir_open_root ();
    struct inode *inode = NULL;
 
    if (dir != NULL)
        dir_lookup (dir, name, &inode);
    dir_close (dir);
 
    return file_open (inode);
}

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filesys_remove()

bool filesys_remove

(

const char *

name

)

                                  {
    struct dir *dir = dir_open_root ();
    bool success = dir != NULL && dir_remove (dir, name);
    dir_close (dir);
 
    return success;
}

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Variable Documentation

filesys_disk

struct disk* filesys_disk