superblock.h

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#ifndef EXT_FILESYSTEM_SUBERBLOCK_H_
#define EXT_FILESYSTEM_SUBERBLOCK_H_

#include <stdint.h>
#include <stdbool.h>

struct __attribute__((__packed__)) fs_info {
  uint16_t inodes_count;
  uint16_t blocks_count;
  uint16_t block_size;
  uint16_t blocks_count_in_inode;
  uint16_t max_path_len;
  uint16_t descriptors_count;
  uint16_t magic;
};

struct __attribute__((__packed__)) superblock {
  struct fs_info* fs_info;
  bool* reserved_inodes_mask;
  bool* reserved_blocks_mask;
};

size_t sizeof_superblock(const struct superblock* superblock);

void init_super_block(struct superblock* superblock);

void destroy_super_block(struct superblock* superblock);

ssize_t read_super_block(int fd, struct superblock* superblock);

ssize_t write_super_block(int fd, struct superblock* superblock);

uint16_t reserve_inode(const struct superblock* superblock);

uint16_t free_inode(const struct superblock* superblock, uint16_t inode_id);

uint16_t reserve_block(const struct superblock* superblock);

uint16_t free_block(const struct superblock* superblock, uint16_t block_id);

#endif //EXT_FILESYSTEM_SUBERBLOCK_H_