/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */


#ifndef _UAPILINUX_NBD_H
#define _UAPILINUX_NBD_H

#include <linux/types.h>

#define NBD_SET_SOCK	_IO( 0xab, 0 )
#define NBD_SET_BLKSIZE	_IO( 0xab, 1 )
#define NBD_SET_SIZE	_IO( 0xab, 2 )
#define NBD_DO_IT	_IO( 0xab, 3 )
#define NBD_CLEAR_SOCK	_IO( 0xab, 4 )
#define NBD_CLEAR_QUE	_IO( 0xab, 5 )
#define NBD_PRINT_DEBUG	_IO( 0xab, 6 )
#define NBD_SET_SIZE_BLOCKS	_IO( 0xab, 7 )
#define NBD_DISCONNECT  _IO( 0xab, 8 )
#define NBD_SET_TIMEOUT _IO( 0xab, 9 )
#define NBD_SET_FLAGS   _IO( 0xab, 10)

enum {
	NBD_CMD_READ = 0,
	NBD_CMD_WRITE = 1,
	NBD_CMD_DISC = 2,
	NBD_CMD_FLUSH = 3,
	NBD_CMD_TRIM = 4
};


#define NBD_FLAG_HAS_FLAGS	(1 << 0) 
#define NBD_FLAG_READ_ONLY	(1 << 1) 
#define NBD_FLAG_SEND_FLUSH	(1 << 2) 
#define NBD_FLAG_SEND_FUA	(1 << 3) 

#define NBD_FLAG_SEND_TRIM	(1 << 5) 
#define NBD_FLAG_CAN_MULTI_CONN	(1 << 8)	


#define NBD_CMD_FLAG_FUA	(1 << 16) 


#define NBD_CFLAG_DESTROY_ON_DISCONNECT	(1 << 0) 
#define NBD_CFLAG_DISCONNECT_ON_CLOSE (1 << 1) 





#define NBD_REQUEST_MAGIC 0x25609513
#define NBD_REPLY_MAGIC 0x67446698



struct nbd_request {
	__be32 magic;
	__be32 type;	
	char handle[8];
	__be64 from;
	__be32 len;
} __attribute__((packed));


struct nbd_reply {
	__be32 magic;
	__be32 error;		
	char handle[8];		
};
#endif 
