// vfs.h
// Virtual file system subsystem for HOS
// Author: Josh Holtrop
// Date: 05/10/05
// Modified: 05/10/05

#ifndef __HOS_VFS_H__
#define __HOS_VFS_H__ __HOS_VFS_H__

#define FS_EXT2			1

#define VFS_FT_UNKNOWN		0
#define VFS_FT_FILE		1
#define VFS_FT_DIR		2
#define VFS_FT_CHAR		3
#define VFS_FT_BLOCK		4
#define VFS_FT_FIFO		5
#define VFS_FT_SOCK		6
#define VFS_FT_SYMLINK		7

#define VFS_PERMS_OX		0x0001
#define VFS_PERMS_OW		0x0002
#define VFS_PERMS_OR		0x0004
#define VFS_PERMS_GX		0x0008
#define VFS_PERMS_GW		0x0010
#define VFS_PERMS_GR		0x0020
#define VFS_PERMS_UX		0x0040
#define VFS_PERMS_UW		0x0080
#define VFS_PERMS_UR		0x0100
#define VFS_PERMS_STICKY	0x0200
#define VFS_PERMS_SGID		0x0400
#define VFS_PERMS_SUID		0x0800

#define EOF			1000000

#include "hos_defines.h"
#include "devices.h"

#ifdef _HOS_CPP_
extern "C" {
#endif

typedef	u64_t inode_num_t;

int	vfs_init();
int	vfs_mount(device_t device, int fsType, char *mountPoint);

#ifdef _HOS_CPP_
}

#include "lang/string.h"

class FileSystem
{
public:
	FileSystem(device_t dev);
	virtual ~FileSystem();

	virtual u32_t	totalBlocks();		/* 512 byte blocks */
	virtual u32_t	usedBlocks();
	virtual u32_t	freeBlocks();

	virtual u32_t	totalInodes();
	virtual u32_t	usedInodes();
	virtual u32_t	freeInodes();

	virtual u32_t	getRootInodeNumber();
};

class VFSMount
{
protected:
	device_t	myDev;
	FileSystem	*myFS;
	int		myRefs;
	string		myMountPoint;
	inode_num_t	myMountInode;
	VFSMount
public:
	VFSMount(device_t dev, FileSystem *fs, string mountPoint, inode_num_t mountInode);
	~VFSMount();
};

#endif

#endif