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7ca30b789d
Add support for new rate limit qdisc Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
130 lines
2.6 KiB
C
130 lines
2.6 KiB
C
/*
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* q_rtlim.c RTLIM.
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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: 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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static void explain(void)
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{
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fprintf(stderr,
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"Usage: ... rlim limit PACKETS rate KBPS [ overhead BYTES ]\n");
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}
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static void explain1(char *arg)
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{
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fprintf(stderr, "Illegal \"%s\"\n", arg);
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}
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#define usage() return(-1)
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static int rlim_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
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{
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unsigned x;
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struct tc_rlim_qopt opt = {
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.overhead = 24, /* Ether IPG + Preamble + CRC */
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};
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struct rtattr *tail;
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while (argc > 0) {
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if (matches(*argv, "limit") == 0) {
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NEXT_ARG();
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if (opt.limit) {
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fprintf(stderr, "Double \"limit\" spec\n");
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return -1;
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}
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if (get_size(&opt.limit, *argv)) {
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explain1("limit");
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return -1;
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}
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} else if (strcmp(*argv, "rate") == 0) {
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NEXT_ARG();
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if (opt.rate) {
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fprintf(stderr, "Double \"rate\" spec\n");
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return -1;
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}
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if (get_rate(&x, *argv)) {
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explain1("rate");
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return -1;
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}
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opt.rate = x;
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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.rate == 0) {
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fprintf(stderr, "\"rate\" is required.\n");
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return -1;
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}
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if (opt.limit == 0)
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opt.limit = 1000;
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tail = NLMSG_TAIL(n);
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addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
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addattr_l(n, 2024, TCA_RLIM_PARMS, &opt, sizeof(opt));
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tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
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return 0;
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}
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static int rlim_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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struct rtattr *tb[TCA_RLIM_PARMS+1];
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struct tc_rlim_qopt *qopt;
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SPRINT_BUF(b1);
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SPRINT_BUF(b2);
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if (opt == NULL)
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return 0;
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parse_rtattr_nested(tb, TCA_RLIM_PARMS, opt);
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if (tb[TCA_RLIM_PARMS] == NULL)
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return -1;
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qopt = RTA_DATA(tb[TCA_RLIM_PARMS]);
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if (RTA_PAYLOAD(tb[TCA_RLIM_PARMS]) < sizeof(*qopt))
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return -1;
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fprintf(f, "limit %s rate %s overhead %u",
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sprint_size(qopt->limit, b1),
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sprint_rate(qopt->rate, b2),
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qopt->overhead);
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return 0;
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}
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struct qdisc_util rlim_qdisc_util = {
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.id = "rlim",
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.parse_qopt = rlim_parse_opt,
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.print_qopt = rlim_print_opt,
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};
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