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