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qdisc_red.c revision 1.3.14.1 
      1 /*	$NetBSD: qdisc_red.c,v 1.3.14.1 2006/03/18 12:16:52 peter Exp $	*/
      2 /*	$KAME: qdisc_red.c,v 1.5 2002/11/08 06:36:18 kjc Exp $	*/
      3 /*
      4  * Copyright (C) 1999-2000
      5  *	Sony Computer Science Laboratories, Inc.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/param.h>
     30 #include <sys/ioctl.h>
     31 #include <sys/time.h>
     32 #include <sys/socket.h>
     33 #include <net/if.h>
     34 #include <netinet/in.h>
     35 #include <altq/altq.h>
     36 #include <altq/altq_red.h>
     37 
     38 #include <stdio.h>
     39 #include <stdlib.h>
     40 #include <unistd.h>
     41 #include <string.h>
     42 #include <signal.h>
     43 #include <errno.h>
     44 #include <err.h>
     45 
     46 #include "altqstat.h"
     47 
     48 static int avg_scale = 4096;	/* default fixed-point scale */
     49 
     50 void
     51 red_stat_loop(int fd, const char *ifname, int count, int interval)
     52 {
     53 	struct red_stats red_stats;
     54 	struct timeval cur_time, last_time;
     55 	u_int64_t last_bytes;
     56 	double sec;
     57 	int cnt = count;
     58 	sigset_t		omask;
     59 
     60 	strlcpy(red_stats.iface.red_ifname, ifname,
     61 		sizeof(red_stats.iface.red_ifname));
     62 
     63 	gettimeofday(&last_time, NULL);
     64 	last_time.tv_sec -= interval;
     65 	last_bytes = 0;
     66 
     67 	while (count == 0 || cnt-- > 0) {
     68 
     69 		if (ioctl(fd, RED_GETSTATS, &red_stats) < 0)
     70 			err(1, "ioctl RED_GETSTATS");
     71 
     72 		gettimeofday(&cur_time, NULL);
     73 		sec = calc_interval(&cur_time, &last_time);
     74 
     75 		printf(" weight:%d inv_pmax:%d qthresh:(%d,%d)\n",
     76 		       red_stats.weight,  red_stats.inv_pmax,
     77 		       red_stats.th_min,  red_stats.th_max);
     78 		printf(" q_len:%d (avg: %.2f), q_limit:%d\n",
     79 		       red_stats.q_len,
     80 		       ((double)red_stats.q_avg)/(double)avg_scale,
     81 		       red_stats.q_limit);
     82 		printf(" xmit:%llu pkts, drop:%llu pkts (forced: %u, early: %u)\n",
     83 		       (ull)red_stats.xmit_cnt.packets,
     84 		       (ull)red_stats.drop_cnt.packets,
     85 		       red_stats.drop_forced, red_stats.drop_unforced);
     86 		if (red_stats.marked_packets != 0)
     87 			printf(" marked: %u\n", red_stats.marked_packets);
     88 		printf(" throughput: %sbps\n",
     89 		       rate2str(calc_rate(red_stats.xmit_cnt.bytes,
     90 					  last_bytes, sec)));
     91 		if (red_stats.fv_alloc > 0) {
     92 			printf(" flowvalve: alloc:%u flows:%u\n",
     93 			       red_stats.fv_alloc, red_stats.fv_flows);
     94 			printf("  predrop:%u pass:%u escape:%u\n",
     95 			       red_stats.fv_predrop, red_stats.fv_pass,
     96 			       red_stats.fv_escape);
     97 		}
     98 		printf("\n");
     99 
    100 		last_bytes = red_stats.xmit_cnt.bytes;
    101 		last_time = cur_time;
    102 
    103 		/* wait for alarm signal */
    104 		if (sigprocmask(SIG_BLOCK, NULL, &omask) == 0)
    105 			sigsuspend(&omask);
    106 	}
    107 }
    108 
    109 int
    110 print_redstats(struct redstats *rp)
    111 {
    112 	printf("     RED q_avg:%.2f xmit:%llu (forced:%u early:%u marked:%u)\n",
    113 	       ((double)rp->q_avg)/(double)avg_scale,
    114 	       (ull)rp->xmit_cnt.packets,
    115 	       rp->drop_forced,
    116 	       rp->drop_unforced,
    117 	       rp->marked_packets);
    118 	return 0;
    119 }
    120