#include "filesys/inode.h"
static struct file *free_map_file; /* Free map file. */
-static struct bitmap *free_map; /* Free map, one bit per disk sector. */
+static struct bitmap *free_map; /* Free map, one bit per sector. */
/* Initializes the free map. */
void
free_map_init (void)
{
- free_map = bitmap_create (disk_size (filesys_disk));
+ free_map = bitmap_create (block_size (fs_device));
if (free_map == NULL)
- PANIC ("bitmap creation failed--disk is too large");
+ PANIC ("bitmap creation failed--file system device is too large");
bitmap_mark (free_map, FREE_MAP_SECTOR);
bitmap_mark (free_map, ROOT_DIR_SECTOR);
}
/* Allocates CNT consecutive sectors from the free map and stores
the first into *SECTORP.
- Returns true if successful, false if all sectors were
- available. */
+ Returns true if successful, false if not enough consecutive
+ sectors were available or if the free_map file could not be
+ written. */
bool
-free_map_allocate (size_t cnt, disk_sector_t *sectorp)
+free_map_allocate (size_t cnt, block_sector_t *sectorp)
{
- disk_sector_t sector = bitmap_scan_and_flip (free_map, 0, cnt, false);
+ block_sector_t sector = bitmap_scan_and_flip (free_map, 0, cnt, false);
if (sector != BITMAP_ERROR
&& free_map_file != NULL
&& !bitmap_write (free_map, free_map_file))
/* Makes CNT sectors starting at SECTOR available for use. */
void
-free_map_release (disk_sector_t sector, size_t cnt)
+free_map_release (block_sector_t sector, size_t cnt)
{
ASSERT (bitmap_all (free_map, sector, cnt));
bitmap_set_multiple (free_map, sector, cnt, false);