mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-24 10:23:40 +08:00
346 lines
8.6 KiB
C
346 lines
8.6 KiB
C
/*
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* q_gred.c GRED.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: J Hadi Salim(hadi@nortelnetworks.com)
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* code ruthlessly ripped from
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* Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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#include "tc_red.h"
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#if 0
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#define DPRINTF(format,args...) fprintf(stderr,format,##args)
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#else
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#define DPRINTF(format,args...)
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#endif
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static void explain(void)
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{
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fprintf(stderr, "Usage: ... gred DP drop-probability limit BYTES "
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"min BYTES max BYTES\n");
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fprintf(stderr, " avpkt BYTES burst PACKETS probability PROBABILITY "
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"bandwidth KBPS\n");
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fprintf(stderr, " [prio value]\n");
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fprintf(stderr," OR ...\n");
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fprintf(stderr," gred setup DPs <num of DPs> default <default DP> "
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"[grio]\n");
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}
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#define usage() return(-1)
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static int init_gred(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
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{
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struct rtattr *tail;
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struct tc_gred_sopt opt;
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memset(&opt, 0, sizeof(struct tc_gred_sopt));
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while (argc > 0) {
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DPRINTF(stderr,"init_gred: invoked with %s\n",*argv);
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if (strcmp(*argv, "DPs") == 0) {
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NEXT_ARG();
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DPRINTF(stderr,"init_gred: next_arg with %s\n",*argv);
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opt.DPs=strtol(*argv, (char **)NULL, 10);
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if (opt.DPs >MAX_DPs) { /* need a better error check */
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fprintf(stderr, "DPs =%u \n",opt.DPs);
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fprintf(stderr, "Illegal \"DPs\"\n");
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fprintf(stderr, "GRED: only %d DPs are "
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"currently supported\n",MAX_DPs);
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return -1;
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}
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} else if (strcmp(*argv, "default") == 0) {
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NEXT_ARG();
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opt.def_DP=strtol(*argv, (char **)NULL, 10);
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if (!opt.DPs) {
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fprintf(stderr, "\"default DP\" must be "
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"defined after DPs\n");
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return -1;
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}
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#if 0
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if (opt.def_DP>opt.DPs-1) {
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#endif
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if (opt.def_DP>opt.DPs) {
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/*
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fprintf(stderr, "\"default DP\" must be less than %d\nNote: DP runs from 0 to %d for %d DPs\n",opt.DPs,opt.DPs-1,opt.DPs);
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*/
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fprintf(stderr, "\"default DP\" must be less than %d\n",opt.DPs);
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return -1;
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}
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} else if (strcmp(*argv, "grio") == 0) {
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opt.grio=1;
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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} else {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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argc--; argv++;
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}
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if ((!opt.DPs) || (!opt.def_DP))
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{
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fprintf(stderr, "Illegal gred setup parameters \n");
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return -1;
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}
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DPRINTF("TC_GRED: sending DPs=%d default=%d\n",opt.DPs,opt.def_DP);
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n->nlmsg_flags|=NLM_F_CREATE;
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tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len));
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addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
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addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
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tail->rta_len = (((void*)n)+NLMSG_ALIGN(n->nlmsg_len)) - (void*)tail;
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return 0;
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}
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/*
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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*/
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static int gred_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
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{
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int ok=0;
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struct tc_gred_qopt opt;
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unsigned burst = 0;
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unsigned avpkt = 0;
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double probability = 0.02;
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unsigned rate = 0;
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int wlog;
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__u8 sbuf[256];
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struct rtattr *tail;
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memset(&opt, 0, sizeof(opt));
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while (argc > 0) {
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if (strcmp(*argv, "limit") == 0) {
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NEXT_ARG();
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if (get_size(&opt.limit, *argv)) {
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fprintf(stderr, "Illegal \"limit\"\n");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "setup") == 0) {
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if (ok) {
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fprintf(stderr, "Illegal \"setup\"\n");
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return -1;
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}
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return init_gred(qu,argc-1, argv+1,n);
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} else if (strcmp(*argv, "min") == 0) {
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NEXT_ARG();
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if (get_size(&opt.qth_min, *argv)) {
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fprintf(stderr, "Illegal \"min\"\n");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "max") == 0) {
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NEXT_ARG();
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if (get_size(&opt.qth_max, *argv)) {
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fprintf(stderr, "Illegal \"max\"\n");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "DP") == 0) {
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NEXT_ARG();
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opt.DP=strtol(*argv, (char **)NULL, 10);
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DPRINTF ("\n ******* DP =%u\n",opt.DP);
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if (opt.DP >MAX_DPs) { /* need a better error check */
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fprintf(stderr, "DP =%u \n",opt.DP);
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fprintf(stderr, "Illegal \"DP\"\n");
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fprintf(stderr, "GRED: only %d DPs are currently supported\n",MAX_DPs);
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return -1;
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}
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#if 0
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return -1;
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}
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#endif
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ok++;
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} else if (strcmp(*argv, "burst") == 0) {
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NEXT_ARG();
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if (get_unsigned(&burst, *argv, 0)) {
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fprintf(stderr, "Illegal \"burst\"\n");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "avpkt") == 0) {
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NEXT_ARG();
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if (get_size(&avpkt, *argv)) {
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fprintf(stderr, "Illegal \"avpkt\"\n");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "probability") == 0) {
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NEXT_ARG();
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if (sscanf(*argv, "%lg", &probability) != 1) {
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fprintf(stderr, "Illegal \"probability\"\n");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "prio") == 0) {
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NEXT_ARG();
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opt.prio=strtol(*argv, (char **)NULL, 10);
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/* some error check here */
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ok++;
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} else if (strcmp(*argv, "bandwidth") == 0) {
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NEXT_ARG();
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if (get_rate(&rate, *argv)) {
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fprintf(stderr, "Illegal \"bandwidth\"\n");
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return -1;
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}
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ok++;
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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} else {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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argc--; argv++;
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}
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if (!ok)
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return 0;
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if (rate == 0)
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get_rate(&rate, "10Mbit");
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if (!opt.qth_min || !opt.qth_max || !burst || !opt.limit || !avpkt ||
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(opt.DP<0)) {
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fprintf(stderr, "Required parameter (min, max, burst, limit, "
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"avpket, DP) is missing\n");
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return -1;
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}
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if ((wlog = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
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fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
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return -1;
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}
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if (wlog >= 10)
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fprintf(stderr, "GRED: WARNING. Burst %d seems to be to "
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"large.\n", burst);
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opt.Wlog = wlog;
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if ((wlog = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
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fprintf(stderr, "GRED: failed to calculate probability.\n");
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return -1;
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}
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opt.Plog = wlog;
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if ((wlog = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
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{
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fprintf(stderr, "GRED: failed to calculate idle damping "
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"table.\n");
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return -1;
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}
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opt.Scell_log = wlog;
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tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len));
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addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
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addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
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addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
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tail->rta_len = (((void*)n)+NLMSG_ALIGN(n->nlmsg_len)) - (void*)tail;
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return 0;
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}
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static int gred_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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struct rtattr *tb[TCA_GRED_STAB+1];
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struct tc_gred_qopt *qopt;
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int i;
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SPRINT_BUF(b1);
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SPRINT_BUF(b2);
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SPRINT_BUF(b3);
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SPRINT_BUF(b4);
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SPRINT_BUF(b5);
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if (opt == NULL)
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return 0;
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memset(tb, 0, sizeof(tb));
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parse_rtattr(tb, TCA_GRED_STAB, RTA_DATA(opt), RTA_PAYLOAD(opt));
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if (tb[TCA_GRED_PARMS] == NULL)
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return -1;
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#if 0
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sopt = RTA_DATA(tb[TCA_GRED_DPS]);
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if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt)) {
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printf("\n GRED DPs message smaller than expected\n");
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return -1;
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}
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DPRINTF(f, "\n\tDPs:%d Default DP %d\n ",
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sopt->DPs, sopt->def_DP);
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#endif
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qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
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if (RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(*qopt)*MAX_DPs) {
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fprintf(f,"\n GRED received message smaller than expected\n");
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return -1;
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}
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#if 0
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for (i=0;i<sopt->DPs;i++)
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#endif
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/* Bad hack! should really return a proper message as shown above*/
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for (i=0;i<MAX_DPs;i++, qopt++) {
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if (qopt->DP >= MAX_DPs) continue;
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fprintf(f, "\n DP:%d (prio %d) Average Queue %s Measured "
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"Queue %s ",
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qopt->DP,
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qopt->prio,
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sprint_size(qopt->qave, b4),
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sprint_size(qopt->backlog, b5));
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fprintf(f, "\n\t Packet drops: %d (forced %d early %d) ",
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qopt->forced+qopt->early,
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qopt->forced,
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qopt->early);
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fprintf(f, "\n\t Packet totals: %u (bytes %u) ",
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qopt->packets,
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qopt->bytesin);
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if (show_details)
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fprintf(f, "\n limit %s min %s max %s ",
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sprint_size(qopt->limit, b1),
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sprint_size(qopt->qth_min, b2),
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sprint_size(qopt->qth_max, b3));
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fprintf(f, "ewma %u Plog %u Scell_log %u",
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qopt->Wlog, qopt->Plog, qopt->Scell_log);
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}
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return 0;
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}
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static int gred_print_xstats(struct qdisc_util *qu, FILE *f,
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struct rtattr *xstats)
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{
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return 0;
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}
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struct qdisc_util gred_util = {
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NULL,
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"gred",
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gred_parse_opt,
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gred_print_opt,
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gred_print_xstats,
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};
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