+/*
+ * 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 <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"
+ " [ peakrate KBPS ] [ latency TIME ] "
+ "[ overhead BYTES ] [ linklayer TYPE ]\n");
+}
+
+static void explain1(const char *arg, const char *val)
+{
+ fprintf(stderr, "tbf: illegal value for \"%s\": \"%s\"\n", arg, val);
+}
+
+
+static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv,
+ struct nlmsghdr *n, const char *dev)
+{
+ 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;
+ unsigned short overhead = 0;
+ unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
+ struct rtattr *tail;
+ __u64 rate64 = 0, prate64 = 0;
+
+ while (argc > 0) {
+ if (matches(*argv, "limit") == 0) {
+ NEXT_ARG();
+ if (opt.limit) {
+ fprintf(stderr, "tbf: duplicate \"limit\" specification\n");
+ return -1;
+ }
+ if (latency) {
+ fprintf(stderr, "tbf: specifying both \"latency\" and \"limit\" is not allowed\n");
+ return -1;
+ }
+ if (get_size(&opt.limit, *argv)) {
+ explain1("limit", *argv);
+ return -1;
+ }
+ ok++;
+ } else if (matches(*argv, "latency") == 0) {
+ NEXT_ARG();
+ if (latency) {
+ fprintf(stderr, "tbf: duplicate \"latency\" specification\n");
+ return -1;
+ }
+ if (opt.limit) {
+ fprintf(stderr, "tbf: specifying both \"limit\" and \"/latency\" is not allowed\n");
+ return -1;
+ }
+ if (get_time(&latency, *argv)) {
+ explain1("latency", *argv);
+ return -1;
+ }
+ ok++;
+ } else if (matches(*argv, "burst") == 0 ||
+ strcmp(*argv, "buffer") == 0 ||
+ strcmp(*argv, "maxburst") == 0) {
+ const char *parm_name = *argv;
+
+ NEXT_ARG();
+ if (buffer) {
+ fprintf(stderr, "tbf: duplicate \"buffer/burst/maxburst\" specification\n");
+ return -1;
+ }
+ if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) {
+ explain1(parm_name, *argv);
+ return -1;
+ }
+ ok++;
+ } else if (strcmp(*argv, "mtu") == 0 ||
+ strcmp(*argv, "minburst") == 0) {
+ const char *parm_name = *argv;
+
+ NEXT_ARG();
+ if (mtu) {
+ fprintf(stderr, "tbf: duplicate \"mtu/minburst\" specification\n");
+ return -1;
+ }
+ if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) {
+ explain1(parm_name, *argv);
+ return -1;
+ }
+ ok++;
+ } else if (strcmp(*argv, "mpu") == 0) {
+ NEXT_ARG();
+ if (mpu) {
+ fprintf(stderr, "tbf: duplicate \"mpu\" specification\n");
+ return -1;
+ }
+ if (get_size(&mpu, *argv)) {
+ explain1("mpu", *argv);
+ return -1;
+ }
+ ok++;
+ } else if (strcmp(*argv, "rate") == 0) {
+ NEXT_ARG();
+ if (rate64) {
+ fprintf(stderr, "tbf: duplicate \"rate\" specification\n");
+ return -1;
+ }
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate64(&rate64, *argv, dev)) {
+ explain1("rate", *argv);
+ return -1;
+ }
+ } else if (get_rate64(&rate64, *argv)) {
+ explain1("rate", *argv);
+ return -1;
+ }
+ ok++;
+ } else if (matches(*argv, "peakrate") == 0) {
+ NEXT_ARG();
+ if (prate64) {
+ fprintf(stderr, "tbf: duplicate \"peakrate\" specification\n");
+ return -1;
+ }
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate64(&prate64, *argv, dev)) {
+ explain1("peakrate", *argv);
+ return -1;
+ }
+ } else if (get_rate64(&prate64, *argv)) {
+ explain1("peakrate", *argv);
+ return -1;
+ }
+ ok++;
+ } else if (matches(*argv, "overhead") == 0) {
+ NEXT_ARG();
+ if (overhead) {
+ fprintf(stderr, "tbf: duplicate \"overhead\" specification\n");
+ return -1;
+ }
+ if (get_u16(&overhead, *argv, 10)) {
+ explain1("overhead", *argv); return -1;
+ }
+ } else if (matches(*argv, "linklayer") == 0) {
+ NEXT_ARG();
+ if (get_linklayer(&linklayer, *argv)) {
+ explain1("linklayer", *argv); return -1;
+ }
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "tbf: unknown parameter \"%s\"\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ int verdict = 0;
+
+ /* Be nice to the user: try to emit all error messages in
+ * one go rather than reveal one more problem when a
+ * previous one has been fixed.
+ */
+ if (rate64 == 0) {
+ fprintf(stderr, "tbf: the \"rate\" parameter is mandatory.\n");
+ verdict = -1;
+ }
+ if (!buffer) {
+ fprintf(stderr, "tbf: the \"burst\" parameter is mandatory.\n");
+ verdict = -1;
+ }
+ if (prate64) {
+ if (!mtu) {
+ fprintf(stderr, "tbf: when \"peakrate\" is specified, \"mtu\" must also be specified.\n");
+ verdict = -1;
+ }
+ }
+
+ if (opt.limit == 0 && latency == 0) {
+ fprintf(stderr, "tbf: either \"limit\" or \"latency\" is required.\n");
+ verdict = -1;
+ }
+
+ if (verdict != 0) {
+ explain();
+ return verdict;
+ }
+
+ opt.rate.rate = (rate64 >= (1ULL << 32)) ? ~0U : rate64;
+ opt.peakrate.rate = (prate64 >= (1ULL << 32)) ? ~0U : prate64;
+
+ if (opt.limit == 0) {
+ double lim = rate64*(double)latency/TIME_UNITS_PER_SEC + buffer;
+
+ if (prate64) {
+ double lim2 = prate64*(double)latency/TIME_UNITS_PER_SEC + mtu;
+
+ if (lim2 < lim)
+ lim = lim2;
+ }
+ opt.limit = lim;
+ }
+
+ opt.rate.mpu = mpu;
+ opt.rate.overhead = overhead;
+ if (tc_calc_rtable(&opt.rate, rtab, Rcell_log, mtu, linklayer) < 0) {
+ fprintf(stderr, "tbf: failed to calculate rate table.\n");
+ return -1;
+ }
+ opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer);
+
+ if (opt.peakrate.rate) {
+ opt.peakrate.mpu = mpu;
+ opt.peakrate.overhead = overhead;
+ if (tc_calc_rtable(&opt.peakrate, ptab, Pcell_log, mtu, linklayer) < 0) {
+ fprintf(stderr, "tbf: failed to calculate peak rate table.\n");
+ return -1;
+ }
+ opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu);
+ }
+
+ tail = addattr_nest(n, 1024, TCA_OPTIONS);
+ addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt));
+ addattr_l(n, 2124, TCA_TBF_BURST, &buffer, sizeof(buffer));
+ if (rate64 >= (1ULL << 32))
+ addattr_l(n, 2124, TCA_TBF_RATE64, &rate64, sizeof(rate64));
+ addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024);
+ if (opt.peakrate.rate) {
+ if (prate64 >= (1ULL << 32))
+ addattr_l(n, 3124, TCA_TBF_PRATE64, &prate64, sizeof(prate64));
+ addattr_l(n, 3224, TCA_TBF_PBURST, &mtu, sizeof(mtu));
+ addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024);
+ }
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ struct rtattr *tb[TCA_TBF_MAX+1];
+ struct tc_tbf_qopt *qopt;
+ unsigned int linklayer;
+ double buffer, mtu;
+ double latency, lat2;
+ __u64 rate64 = 0, prate64 = 0;
+
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b2);
+ SPRINT_BUF(b3);
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_TBF_MAX, 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;
+ rate64 = qopt->rate.rate;
+ if (tb[TCA_TBF_RATE64] &&
+ RTA_PAYLOAD(tb[TCA_TBF_RATE64]) >= sizeof(rate64))
+ rate64 = rta_getattr_u64(tb[TCA_TBF_RATE64]);
+ tc_print_rate(PRINT_ANY, "rate", "rate %s ", rate64);
+ buffer = tc_calc_xmitsize(rate64, qopt->buffer);
+ if (show_details) {
+ sprintf(b1, "%s/%u", sprint_size(buffer, b2),
+ 1 << qopt->rate.cell_log);
+ print_string(PRINT_ANY, "burst", "burst %s ", b1);
+ print_size(PRINT_ANY, "mpu", "mpu %s ", qopt->rate.mpu);
+ } else {
+ print_size(PRINT_ANY, "burst", "burst %s ", buffer);
+ }
+ if (show_raw)
+ print_hex(PRINT_ANY, "burst_raw", "[%08x] ", qopt->buffer);
+ prate64 = qopt->peakrate.rate;
+ if (tb[TCA_TBF_PRATE64] &&
+ RTA_PAYLOAD(tb[TCA_TBF_PRATE64]) >= sizeof(prate64))
+ prate64 = rta_getattr_u64(tb[TCA_TBF_PRATE64]);
+ if (prate64) {
+ tc_print_rate(PRINT_FP, "peakrate", "peakrate %s ", prate64);
+ if (qopt->mtu || qopt->peakrate.mpu) {
+ mtu = tc_calc_xmitsize(prate64, qopt->mtu);
+ if (show_details) {
+ sprintf(b1, "%s/%u", sprint_size(mtu, b2),
+ 1 << qopt->peakrate.cell_log);
+ print_string(PRINT_ANY, "mtu", "mtu %s ", b1);
+ print_size(PRINT_ANY, "mpu", "mpu %s ",
+ qopt->peakrate.mpu);
+ } else {
+ print_size(PRINT_ANY, "minburst",
+ "minburst %s ", mtu);
+ }
+ if (show_raw)
+ print_hex(PRINT_ANY, "mtu_raw", "[%08x] ",
+ qopt->mtu);
+ }
+ }
+
+ latency = TIME_UNITS_PER_SEC * (qopt->limit / (double)rate64) -
+ tc_core_tick2time(qopt->buffer);
+ if (prate64) {
+ lat2 = TIME_UNITS_PER_SEC * (qopt->limit / (double)prate64) -
+ tc_core_tick2time(qopt->mtu);
+
+ if (lat2 > latency)
+ latency = lat2;
+ }
+ if (latency >= 0.0) {
+ print_u64(PRINT_JSON, "lat", NULL, latency);
+ print_string(PRINT_FP, NULL, "lat %s ",
+ sprint_time(latency, b1));
+ }
+ if (show_raw || latency < 0.0)
+ print_size(PRINT_ANY, "limit", "limit %s ", qopt->limit);
+ if (qopt->rate.overhead)
+ print_int(PRINT_ANY, "overhead", "overhead %d ",
+ qopt->rate.overhead);
+ linklayer = (qopt->rate.linklayer & TC_LINKLAYER_MASK);
+ if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
+ print_string(PRINT_ANY, "linklayer", "linklayer %s ",
+ sprint_linklayer(linklayer, b3));
+
+ return 0;
+}
+
+struct qdisc_util tbf_qdisc_util = {
+ .id = "tbf",
+ .parse_qopt = tbf_parse_opt,
+ .print_qopt = tbf_print_opt,
+};
projects / mirror_iproute2.git / blobdiff