#ifndef VPI_H
#define VPI_H

#include <linux/list.h>
#include "bool.h"
#include "vars.h"
#include <linux/slab.h>

#define MOUNT_NAMESIZE 		20
#define DEFAULT_NUM_VPIS	10
#define DEFAULT_VPI_MODE	0x81f8 //file, mode: 770
#define DEFAULT_ROOT_VPI	"/mnt/ramdisk"
#define DEFAULT_FS_SIZE		100000000
#define DEFAULT_ROOT_MODE	0x41fd //directory, mode: 775
#define DEFAULT_ROOT_SIZE	1024
#define DEFAULT_FSID		256

extern char * default_root;

//NFS ACCESS Bits
#define ACCESS_READ    0x0001; //Read data from file or read a directory.
#define ACCESS_LOOKUP  0x0002; //Look up a name in a directory (no meaning for non-directory objects).
#define ACCESS_MODIFY  0x0004; //Rewrite existing file data or modify existing directory entries.
#define ACCESS_EXTEND  0x0008; //Write new data or add directory Entries.
#define ACCESS_DELETE  0x0010; //Delete an existing directory entry.
#define ACCESS_EXECUTE 0x0020; //Execute file (no meaning for a directory).

//File STAT constants
#define NFS3_ATTR_FOLLOW	1
#define NFS3_REG_FILE		1
#define NFS3_DIRECTORY		2
#define NFS3_FILE_SYNC		2

extern list_head vpis;
extern u64 total_vpis;
extern u64 total_bytes;
extern kmem_cache_t * vcache;

typedef struct stat3 {
	ulong 	type,
		mode,
		nlinks,
		uid,
		gid;
	u64	size,
		used,
		rdev,
		fsid,
		vpid,
		atime,
		mtime,
		ctime;	
} stat3;

typedef struct VPI {
	struct list_head list;
	ulong	id, 		//same as the inode # of the mountpoint
		readcount,
		writecount;
	ulong	size;   	//size of the VPI
	bool	growable;   	//size of the VPI can change or not (grow)
	ulong	nfs_access;
	u64	eof;		//which offset contains the last block
	u64	eof_size;	//how big is it
	stat3	attr;
	char  	name[MOUNT_NAMESIZE];
	int	namesize;
} VPI;

typedef struct handle3 {
	ulong vpid;
} handle3;

#define NFS3_HANDLE_SIZE 	sizeof(handle3)

VPI *	get_VPI(ulong);
void 	add_VPI(char *, u64, bool, ulong, bool);
void	reset_VPI(VPI *);
#endif