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#ifndef MELVIX_VFS_H
#define MELVIX_VFS_H
#include <stdint.h>
#define PATH_SEPARATOR '/'
#define PATH_SEPARATOR_STRING "/"
#define PATH_UP ".."
#define PATH_DOT "."
#define VFS_EXT2_MAGIC 0xeeee2222
#define O_RDONLY 0x0000
#define O_WRONLY 0x0001
#define O_RDWR 0x0002
#define O_APPEND 0x0008
#define O_CREAT 0x0200
#define O_TRUNC 0x0400
#define O_EXCL 0x0800
#define O_NOFOLLOW 0x1000
#define O_PATH 0x2000
#define FS_FILE 0x01
#define FS_DIRECTORY 0x02
#define FS_CHARDEVICE 0x04
#define FS_BLOCKDEVICE 0x08
#define FS_PIPE 0x10
#define FS_SYMLINK 0x20
#define FS_MOUNTPOINT 0x40
#define _IFMT 0170000 /* type of file */
#define _IFDIR 0040000 /* directory */
#define _IFCHR 0020000 /* character special */
#define _IFBLK 0060000 /* block special */
#define _IFREG 0100000 /* regular */
#define _IFLNK 0120000 /* symbolic link */
#define _IFSOCK 0140000 /* socket */
#define _IFIFO 0010000 /* fifo */
struct vfs_node;
typedef uint32_t (*get_file_size_callback)(struct vfs_node *node);
typedef uint32_t (*read_callback)(struct vfs_node *, uint32_t, uint32_t, char *);
typedef uint32_t (*write_callback)(struct vfs_node *, uint32_t, uint32_t, char *);
typedef void (*open_callback)(struct vfs_node *, uint32_t flags);
typedef void (*close_callback)(struct vfs_node *);
typedef struct dirent *(*readdir_callback)(struct vfs_node *, uint32_t);
typedef struct vfs_node *(*finddir_callback)(struct vfs_node *, char *name);
typedef void (*create_callback)(struct vfs_node *, char *name, uint16_t permission);
typedef void (*unlink_callback)(struct vfs_node *, char *name);
typedef void (*mkdir_callback)(struct vfs_node *, char *name, uint16_t permission);
typedef int (*ioctl_callback)(struct vfs_node *, int request, void *argp);
typedef int (*get_size_callback)(struct vfs_node *);
typedef void (*chmod_callback)(struct vfs_node *, uint32_t mode);
typedef char **(*listdir_callback)(struct vfs_node *);
typedef struct vfs_node {
char name[256];
void *device;
uint32_t mask;
uint32_t uid;
uint32_t gid;
uint32_t flags;
uint32_t inode_num;
uint32_t size;
uint32_t fs_type;
uint32_t open_flags;
uint32_t create_time;
uint32_t access_time;
uint32_t modified_time;
uint32_t offset;
unsigned nlink;
int refcount;
// File operations
read_callback read;
write_callback write;
open_callback open;
close_callback close;
readdir_callback readdir;
finddir_callback finddir;
create_callback create;
unlink_callback unlink;
mkdir_callback mkdir;
ioctl_callback ioctl;
get_size_callback get_size;
chmod_callback chmod;
get_file_size_callback get_file_size;
listdir_callback listdir;
} vfs_node_t;
struct dirent {
char name[256];
uint32_t inode_num;
};
typedef struct vfs_entry {
char *name;
vfs_node_t *file;
} vfs_entry_t;
uint32_t vfs_get_file_size(vfs_node_t *node);
uint32_t vfs_read(vfs_node_t *node, uint32_t offset, uint32_t size, char *buffer);
uint32_t vfs_write(vfs_node_t *node, uint32_t offset, uint32_t size, char *buffer);
void vfs_open(struct vfs_node *node, uint32_t flags);
void vfs_close(vfs_node_t *node);
vfs_node_t *vfs_finddir(vfs_node_t *node, char *name);
void vfs_mkdir(char *name, uint16_t permission);
void vfs_mkfile(char *name, uint16_t permission);
int vfs_create_file(char *name, uint16_t permission);
vfs_node_t *file_open(const char *file_name, uint32_t flags);
char *expand_path(char *input);
int vfs_ioctl(vfs_node_t *node, int request, void *argp);
void vfs_chmod(vfs_node_t *node, uint32_t mode);
void vfs_unlink(char *name);
int vfs_symlink(char *value, char *name);
int vfs_readlink(vfs_node_t *node, char *buf, uint32_t size);
void vfs_init();
void vfs_mount(char *path, vfs_node_t *local_root);
typedef vfs_node_t *(*vfs_mount_callback)(char *arg, char *mountpoint);
void vfs_register(char *name, vfs_mount_callback callme);
void vfs_mount_dev(char *mountpoint, vfs_node_t *node);
void print_vfstree();
void vfs_db_listdir(char *name);
#endif
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