text: /*-
   * Copyright (c) 2007 Scott Long
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: soc2013/dpl/head/tools/tools/mfi/mfi_checkq.c 165768 2007-01-01 23:50:04Z scottl $");
  
  #include <sys/types.h>
  #include <sys/fcntl.h>
  #include <sys/ioctl.h>
  #include <sys/uio.h>
  
  #include </sys/dev/mfi/mfireg.h>
  #include </sys/dev/mfi/mfi_ioctl.h>
  
  #include <errno.h>
  #include <stdio.h>
  
  /*
   * Simple program to print out the queue stats on the given queue index.
   * See /sys/sys/mfi_ioctl.h for the definitions of each queue index.
   */
  
  void
  usage(void)
  {
  	printf("Usage: mfi_checkq <queue_number>\n");
  	exit(1);
  }
  
  int
  main(int argc, char **argv)
  {
  	union mfi_statrequest sr;
  	int fd, retval, queue;
  
  	if (argc != 2)
  		usage();
  
  	fd = open("/dev/mfi0", O_RDWR);
  	if (fd == -1) {
  		printf("couldn't open mfi0: %s\n", strerror(errno));
  		return (-1);
  	}
  
  	queue = atoi(argv[1]);
  	printf("Getting stats for queue %d\n", queue);
  	bzero(&sr, sizeof(union mfi_statrequest));
  	sr.ms_item = queue;
  	retval = ioctl(fd, MFIIO_STATS, &sr);
  	if (retval == -1) {
  		printf("error on ioctl: %s\n", strerror(errno));
  		return (-1);
  	}
  
  	printf("length= %d, max= %d\n",sr.ms_qstat.q_length, sr.ms_qstat.q_max);
  
  	close(fd);
  	return 0;
  }
  