emmafs/inode.h

#ifndef INODE_H_
#define INODE_H_

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

#include "util.h"

typedef struct Inode Inode;

enum permissions {
    R = 1,
    W = 2,
    X = 4
};

struct inode_table {
    // the following keyword spam purely exist so I definitely see it with highlighting.
    // NOTE, TODO, FIXME, DEPRECATED, HACK, IMPORTANT: always initialize all values to be null when the inode table is created!!!!
    // TODO: Change currently hardcoded value to actually accurately describe the size of the filesystem, only for temporary purposes.
    Inode* inodes[640000];
    uint32_t size;
    uint32_t used_inodes;
    uint32_t free_inodes;
};

struct Inode {
    // file information
    char name[64];
    uint32_t filesize;

    // ownership and permissions
    uint8_t user_permissions;
    uint8_t group_permissions;

    // UID
    uint16_t owner;
    // GID
    uint16_t group;

    // timestamps
    tm created;
    tm last_modified;

    uint16_t block_count;
    block* data_block;
};

Inode* create_inode(char name[64], uint8_t user_permissions, uint8_t group_permissions, uint16_t owner, uint16_t group, block* data_block);
Inode* find_inode(char filename[], struct inode_table* itable);
bool inode_exists(struct inode_table* itable, char filename[]);
void delete_inode(struct inode_table* itable, char filename[]);

#endif // INODE_H_