+++ /dev/null
-/*
- * q_tbf.c TBF.
- *
- * 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: 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"
-
-static void explain(void)
-{
- fprintf(stderr, "Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu BYTES[/BYTES] ]\n");
- fprintf(stderr, " [ peakrate KBPS ] [ latency TIME ]\n");
-}
-
-static void explain1(char *arg)
-{
- fprintf(stderr, "Illegal \"%s\"\n", arg);
-}
-
-
-#define usage() return(-1)
-
-static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
-{
- int ok=0;
- struct tc_tbf_qopt opt;
- __u32 rtab[256];
- __u32 ptab[256];
- unsigned buffer=0, mtu=0, mpu=0, latency=0;
- int Rcell_log=-1, Pcell_log = -1;
- struct rtattr *tail;
-
- memset(&opt, 0, sizeof(opt));
-
- while (argc > 0) {
- if (matches(*argv, "limit") == 0) {
- NEXT_ARG();
- if (opt.limit || latency) {
- fprintf(stderr, "Double \"limit/latency\" spec\n");
- return -1;
- }
- if (get_size(&opt.limit, *argv)) {
- explain1("limit");
- return -1;
- }
- ok++;
- } else if (matches(*argv, "latency") == 0) {
- NEXT_ARG();
- if (opt.limit || latency) {
- fprintf(stderr, "Double \"limit/latency\" spec\n");
- return -1;
- }
- if (get_usecs(&latency, *argv)) {
- explain1("latency");
- return -1;
- }
- ok++;
- } else if (matches(*argv, "burst") == 0 ||
- strcmp(*argv, "buffer") == 0 ||
- strcmp(*argv, "maxburst") == 0) {
- NEXT_ARG();
- if (buffer) {
- fprintf(stderr, "Double \"buffer/burst\" spec\n");
- return -1;
- }
- if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) {
- explain1("buffer");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "mtu") == 0 ||
- strcmp(*argv, "minburst") == 0) {
- NEXT_ARG();
- if (mtu) {
- fprintf(stderr, "Double \"mtu/minburst\" spec\n");
- return -1;
- }
- if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) {
- explain1("mtu");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "mpu") == 0) {
- NEXT_ARG();
- if (mpu) {
- fprintf(stderr, "Double \"mpu\" spec\n");
- return -1;
- }
- if (get_size(&mpu, *argv)) {
- explain1("mpu");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "rate") == 0) {
- NEXT_ARG();
- if (opt.rate.rate) {
- fprintf(stderr, "Double \"rate\" spec\n");
- return -1;
- }
- if (get_rate(&opt.rate.rate, *argv)) {
- explain1("rate");
- return -1;
- }
- ok++;
- } else if (matches(*argv, "peakrate") == 0) {
- NEXT_ARG();
- if (opt.peakrate.rate) {
- fprintf(stderr, "Double \"peakrate\" spec\n");
- return -1;
- }
- if (get_rate(&opt.peakrate.rate, *argv)) {
- explain1("peakrate");
- 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 (opt.rate.rate == 0 || !buffer) {
- fprintf(stderr, "Both \"rate\" and \"burst\" are required.\n");
- return -1;
- }
- if (opt.peakrate.rate) {
- if (!mtu) {
- fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n");
- return -1;
- }
- }
-
- if (opt.limit == 0 && latency == 0) {
- fprintf(stderr, "Either \"limit\" or \"latency\" are required.\n");
- return -1;
- }
-
- if (opt.limit == 0) {
- double lim = opt.rate.rate*(double)latency/1000000 + buffer;
- if (opt.peakrate.rate) {
- double lim2 = opt.peakrate.rate*(double)latency/1000000 + mtu;
- if (lim2 < lim)
- lim = lim2;
- }
- opt.limit = lim;
- }
-
- if ((Rcell_log = tc_calc_rtable(opt.rate.rate, rtab, Rcell_log, mtu, mpu)) < 0) {
- fprintf(stderr, "TBF: failed to calculate rate table.\n");
- return -1;
- }
- opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer);
- opt.rate.cell_log = Rcell_log;
- opt.rate.mpu = mpu;
- if (opt.peakrate.rate) {
- if ((Pcell_log = tc_calc_rtable(opt.peakrate.rate, ptab, Pcell_log, mtu, mpu)) < 0) {
- fprintf(stderr, "TBF: failed to calculate peak rate table.\n");
- return -1;
- }
- opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu);
- opt.peakrate.cell_log = Pcell_log;
- opt.peakrate.mpu = mpu;
- }
-
- tail = NLMSG_TAIL(n);
- addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
- addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt));
- addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024);
- if (opt.peakrate.rate)
- addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024);
- tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
- return 0;
-}
-
-static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
-{
- struct rtattr *tb[TCA_TBF_PTAB+1];
- struct tc_tbf_qopt *qopt;
- double buffer, mtu;
- double latency;
- SPRINT_BUF(b1);
- SPRINT_BUF(b2);
-
- if (opt == NULL)
- return 0;
-
- parse_rtattr_nested(tb, TCA_TBF_PTAB, opt);
-
- if (tb[TCA_TBF_PARMS] == NULL)
- return -1;
-
- qopt = RTA_DATA(tb[TCA_TBF_PARMS]);
- if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt))
- return -1;
- fprintf(f, "rate %s ", sprint_rate(qopt->rate.rate, b1));
- buffer = ((double)qopt->rate.rate*tc_core_tick2usec(qopt->buffer))/1000000;
- if (show_details) {
- fprintf(f, "burst %s/%u mpu %s ", sprint_size(buffer, b1),
- 1<<qopt->rate.cell_log, sprint_size(qopt->rate.mpu, b2));
- } else {
- fprintf(f, "burst %s ", sprint_size(buffer, b1));
- }
- if (show_raw)
- fprintf(f, "[%08x] ", qopt->buffer);
- if (qopt->peakrate.rate) {
- fprintf(f, "peakrate %s ", sprint_rate(qopt->peakrate.rate, b1));
- if (qopt->mtu || qopt->peakrate.mpu) {
- mtu = ((double)qopt->peakrate.rate*tc_core_tick2usec(qopt->mtu))/1000000;
- if (show_details) {
- fprintf(f, "mtu %s/%u mpu %s ", sprint_size(mtu, b1),
- 1<<qopt->peakrate.cell_log, sprint_size(qopt->peakrate.mpu, b2));
- } else {
- fprintf(f, "minburst %s ", sprint_size(mtu, b1));
- }
- if (show_raw)
- fprintf(f, "[%08x] ", qopt->mtu);
- }
- }
-
- if (show_raw)
- fprintf(f, "limit %s ", sprint_size(qopt->limit, b1));
-
- latency = 1000000*(qopt->limit/(double)qopt->rate.rate) - tc_core_tick2usec(qopt->buffer);
- if (qopt->peakrate.rate) {
- double lat2 = 1000000*(qopt->limit/(double)qopt->peakrate.rate) - tc_core_tick2usec(qopt->mtu);
- if (lat2 > latency)
- latency = lat2;
- }
- fprintf(f, "lat %s ", sprint_usecs(tc_core_tick2usec(latency), b1));
-
- return 0;
-}
-
-struct qdisc_util tbf_qdisc_util = {
- .id = "tbf",
- .parse_qopt = tbf_parse_opt,
- .print_qopt = tbf_print_opt,
-};
-
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