#define __KERNEL__
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/config.h>
#include <linux/locks.h>
#include <linux/mm.h>
#include <linux/init.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/blk.h>

#include <stdio.h>

char syn[]="Syntax: %s device [read write bomb]\n";

int main(int argc, char *argv[]){
int d;
blkelv_ioctl_arg_t el;

  if (argc<2){
    printf(syn,argv[0]);
    exit(0);
  }

  if((d=open(argv[1],O_RDWR))>=0){
    switch (argc){
      case 2:
        if(!ioctl(d,BLKELVGET,&el)){
          printf("queue_ID: %d\n",el.queue_ID);
          printf("read_latency: %d\n",el.read_latency);
          printf("write_latency: %d\n",el.write_latency);
          printf("max_bomb_segments: %d\n",el.max_bomb_segments);
        }else{
          perror("No elev ");
        }
        break;
      case 5:
        el.read_latency=atoi(argv[2]);
        el.write_latency=atoi(argv[3]);
        el.max_bomb_segments=atoi(argv[4]);
        if(ioctl(d,BLKELVSET,&el))
          perror("No elev ");
        break;
      default:
        printf(syn,argv[0]);
        break;
    }
    close(d);
  }else{
    perror("No open ");
  }
}