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#ifndef MELVIX_VFS_H
#define MELVIX_VFS_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#define MAX_NAME_LENGTH 128
enum node_type {
FILE_NODE = 1,
DIR_NODE,
CHAR_DEV_NODE,
BLOCK_DEV_NODE,
PIPE_NODE,
SYMLINK_NODE,
MOUNTPOINT_NODE = 8
};
struct fs_node;
struct dir_entry;
typedef uint32_t (*read)(struct fs_node *, size_t, size_t, char *);
typedef uint32_t (*write)(struct fs_node *, size_t, size_t, char *);
typedef void (*open)(struct fs_node *);
typedef void (*close)(struct fs_node *);
typedef struct dir_entry *(*read_dir)(struct fs_node *, size_t);
typedef struct fs_node *(*find_dir)(struct fs_node *, char *);
struct fs_node {
char name[MAX_NAME_LENGTH];
uint32_t length;
uint32_t inode;
uint32_t permissions;
uint32_t uid;
uint32_t gid;
enum node_type type;
struct fs_node *node_ptr;
void *impl;
read read;
write write;
open open;
close close;
read_dir read_dir;
find_dir find_dir;
};
struct dir_entry {
char name[MAX_NAME_LENGTH];
uint32_t inode;
};
struct fs_node *fs_root;
uint32_t read_fs_node(struct fs_node *node, size_t offset, size_t size, char *buf);
uint32_t write_fs_node(struct fs_node *node, size_t offset, size_t size, char *buf);
void open_fs_node(struct fs_node *node, bool read, bool write);
void close_fs_node(struct fs_node *node);
struct dir_entry *read_dir_node(struct fs_node *node, size_t index);
struct fs_node *find_dir_node(struct fs_node *node, char *name);
#endif
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