You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
352 lines
9.1 KiB
352 lines
9.1 KiB
/*
|
|
* 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 <math.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: tc qdisc { add | replace | change } ... gred setup vqs NUMBER\n");
|
|
fprintf(stderr, " default DEFAULT_VQ [ grio ] [ limit BYTES ]\n");
|
|
fprintf(stderr, " tc qdisc change ... gred vq VQ [ prio VALUE ] limit BYTES\n");
|
|
fprintf(stderr, " min BYTES max BYTES avpkt BYTES [ burst PACKETS ]\n");
|
|
fprintf(stderr, " [ probability PROBABILITY ] [ bandwidth KBPS ]\n");
|
|
}
|
|
|
|
static int init_gred(struct qdisc_util *qu, int argc, char **argv,
|
|
struct nlmsghdr *n)
|
|
{
|
|
|
|
struct rtattr *tail;
|
|
struct tc_gred_sopt opt = { 0 };
|
|
__u32 limit = 0;
|
|
|
|
opt.def_DP = MAX_DPs;
|
|
|
|
while (argc > 0) {
|
|
DPRINTF(stderr, "init_gred: invoked with %s\n", *argv);
|
|
if (strcmp(*argv, "vqs") == 0 ||
|
|
strcmp(*argv, "DPs") == 0) {
|
|
NEXT_ARG();
|
|
if (get_unsigned(&opt.DPs, *argv, 10)) {
|
|
fprintf(stderr, "Illegal \"vqs\"\n");
|
|
return -1;
|
|
} else if (opt.DPs > MAX_DPs) {
|
|
fprintf(stderr, "GRED: only %u VQs are currently supported\n",
|
|
MAX_DPs);
|
|
return -1;
|
|
}
|
|
} else if (strcmp(*argv, "default") == 0) {
|
|
if (opt.DPs == 0) {
|
|
fprintf(stderr, "\"default\" must be defined after \"vqs\"\n");
|
|
return -1;
|
|
}
|
|
NEXT_ARG();
|
|
if (get_unsigned(&opt.def_DP, *argv, 10)) {
|
|
fprintf(stderr, "Illegal \"default\"\n");
|
|
return -1;
|
|
} else if (opt.def_DP >= opt.DPs) {
|
|
fprintf(stderr, "\"default\" must be less than \"vqs\"\n");
|
|
return -1;
|
|
}
|
|
} else if (strcmp(*argv, "grio") == 0) {
|
|
opt.grio = 1;
|
|
} else if (strcmp(*argv, "limit") == 0) {
|
|
NEXT_ARG();
|
|
if (get_size(&limit, *argv)) {
|
|
fprintf(stderr, "Illegal \"limit\"\n");
|
|
return -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 == MAX_DPs) {
|
|
fprintf(stderr, "Illegal gred setup parameters\n");
|
|
return -1;
|
|
}
|
|
|
|
DPRINTF("TC_GRED: sending DPs=%u def_DP=%u\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));
|
|
if (limit)
|
|
addattr32(n, 1024, TCA_GRED_LIMIT, limit);
|
|
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 = { 0 };
|
|
unsigned int burst = 0;
|
|
unsigned int avpkt = 0;
|
|
double probability = 0.02;
|
|
unsigned int rate = 0;
|
|
int parm;
|
|
__u8 sbuf[256];
|
|
struct rtattr *tail;
|
|
__u32 max_P;
|
|
|
|
opt.DP = MAX_DPs;
|
|
|
|
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, "vq") == 0 ||
|
|
strcmp(*argv, "DP") == 0) {
|
|
NEXT_ARG();
|
|
if (get_unsigned(&opt.DP, *argv, 10)) {
|
|
fprintf(stderr, "Illegal \"vq\"\n");
|
|
return -1;
|
|
} else if (opt.DP >= MAX_DPs) {
|
|
fprintf(stderr, "GRED: only %u VQs are currently supported\n",
|
|
MAX_DPs);
|
|
return -1;
|
|
} /* need a better error check */
|
|
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) {
|
|
explain();
|
|
return -1;
|
|
}
|
|
if (opt.DP == MAX_DPs || !opt.limit || !opt.qth_min || !opt.qth_max ||
|
|
!avpkt) {
|
|
fprintf(stderr, "Required parameter (vq, limit, min, max, avpkt) is missing\n");
|
|
return -1;
|
|
}
|
|
if (!burst) {
|
|
burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
|
|
fprintf(stderr, "GRED: set burst to %u\n", burst);
|
|
}
|
|
if (!rate) {
|
|
get_rate(&rate, "10Mbit");
|
|
fprintf(stderr, "GRED: set bandwidth to 10Mbit\n");
|
|
}
|
|
if ((parm = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
|
|
fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
|
|
return -1;
|
|
}
|
|
if (parm >= 10)
|
|
fprintf(stderr, "GRED: WARNING. Burst %u seems to be too large.\n",
|
|
burst);
|
|
opt.Wlog = parm;
|
|
if ((parm = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
|
|
fprintf(stderr, "GRED: failed to calculate probability.\n");
|
|
return -1;
|
|
}
|
|
opt.Plog = parm;
|
|
if ((parm = 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 = parm;
|
|
|
|
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);
|
|
max_P = probability * pow(2, 32);
|
|
addattr32(n, 1024, TCA_GRED_MAX_P, max_P);
|
|
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_MAX + 1];
|
|
struct tc_gred_sopt *sopt;
|
|
struct tc_gred_qopt *qopt;
|
|
__u32 *max_p = NULL;
|
|
__u32 *limit = NULL;
|
|
unsigned int i;
|
|
|
|
SPRINT_BUF(b1);
|
|
SPRINT_BUF(b2);
|
|
SPRINT_BUF(b3);
|
|
|
|
if (opt == NULL)
|
|
return 0;
|
|
|
|
parse_rtattr_nested(tb, TCA_GRED_MAX, opt);
|
|
|
|
if (tb[TCA_GRED_PARMS] == NULL)
|
|
return -1;
|
|
|
|
if (tb[TCA_GRED_MAX_P] &&
|
|
RTA_PAYLOAD(tb[TCA_GRED_MAX_P]) >= sizeof(__u32) * MAX_DPs)
|
|
max_p = RTA_DATA(tb[TCA_GRED_MAX_P]);
|
|
|
|
if (tb[TCA_GRED_LIMIT] &&
|
|
RTA_PAYLOAD(tb[TCA_GRED_LIMIT]) == sizeof(__u32))
|
|
limit = RTA_DATA(tb[TCA_GRED_LIMIT]);
|
|
|
|
sopt = RTA_DATA(tb[TCA_GRED_DPS]);
|
|
qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
|
|
if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt) ||
|
|
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*/
|
|
|
|
fprintf(f, "vqs %u default %u %s",
|
|
sopt->DPs,
|
|
sopt->def_DP,
|
|
sopt->grio ? "grio " : "");
|
|
|
|
if (limit)
|
|
fprintf(f, "limit %s ",
|
|
sprint_size(*limit, b1));
|
|
|
|
for (i = 0; i < MAX_DPs; i++, qopt++) {
|
|
if (qopt->DP >= MAX_DPs) continue;
|
|
fprintf(f, "\n vq %u prio %hhu limit %s min %s max %s ",
|
|
qopt->DP,
|
|
qopt->prio,
|
|
sprint_size(qopt->limit, b1),
|
|
sprint_size(qopt->qth_min, b2),
|
|
sprint_size(qopt->qth_max, b3));
|
|
if (show_details) {
|
|
fprintf(f, "ewma %u ", qopt->Wlog);
|
|
if (max_p)
|
|
fprintf(f, "probability %lg ", max_p[i] / pow(2, 32));
|
|
else
|
|
fprintf(f, "Plog %u ", qopt->Plog);
|
|
fprintf(f, "Scell_log %u ", qopt->Scell_log);
|
|
}
|
|
if (show_stats) {
|
|
fprintf(f, "\n Queue size: average %s current %s ",
|
|
sprint_size(qopt->qave, b1),
|
|
sprint_size(qopt->backlog, b2));
|
|
fprintf(f, "\n Dropped packets: forced %u early %u pdrop %u other %u ",
|
|
qopt->forced,
|
|
qopt->early,
|
|
qopt->pdrop,
|
|
qopt->other);
|
|
fprintf(f, "\n Total packets: %u (%s) ",
|
|
qopt->packets,
|
|
sprint_size(qopt->bytesin, b1));
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct qdisc_util gred_qdisc_util = {
|
|
.id = "gred",
|
|
.parse_qopt = gred_parse_opt,
|
|
.print_qopt = gred_print_opt,
|
|
};
|