bitmap.h

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// File: include/bitmap.h
 
#ifndef SFUSE_BITMAP_H
#define SFUSE_BITMAP_H
 
#include "super.h"
#include <stdint.h>


struct sfuse_inode_bitmap {
  uint8_t map[SFUSE_BLOCK_SIZE];
};

struct sfuse_block_bitmap {
  uint8_t map[SFUSE_BLOCK_SIZE * 2];
};

struct sfuse_bitmaps {
  struct sfuse_inode_bitmap inode; 
  struct sfuse_block_bitmap block; 
};

int bitmap_load(int fd, uint32_t start_blk, struct sfuse_bitmaps *bmaps,
                uint32_t count);

int bitmap_sync(int fd, uint32_t start_blk, const struct sfuse_bitmaps *bmaps,
                uint32_t count);

int alloc_bit(uint8_t *map, uint32_t total_bits);

void free_bit(uint8_t *map, uint32_t idx);

int alloc_inode(struct sfuse_superblock *sb, struct sfuse_inode_bitmap *imap);

void free_inode(struct sfuse_superblock *sb, struct sfuse_inode_bitmap *imap,
                uint32_t ino);

int alloc_block(struct sfuse_superblock *sb, struct sfuse_block_bitmap *bmap);

void free_block(struct sfuse_superblock *sb, struct sfuse_block_bitmap *bmap,
                uint32_t blk);
 
#endif /* SFUSE_BITMAP_H */