+++ /dev/null
-/*
- * q_hfsc.c HFSC.
- *
- * 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: Patrick McHardy, <kaber@trash.net>
- *
- */
-
-#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"
-
-static int hfsc_get_sc(int *, char ***, struct tc_service_curve *);
-
-
-static void
-explain_qdisc(void)
-{
- fprintf(stderr,
- "Usage: ... hfsc [ default CLASSID ]\n"
- "\n"
- " default: default class for unclassified packets\n"
- );
-}
-
-static void
-explain_class(void)
-{
- fprintf(stderr,
- "Usage: ... hfsc [ [ rt SC ] [ ls SC ] | [ sc SC ] ] [ ul SC ]\n"
- "\n"
- "SC := [ [ m1 BPS ] [ d SEC ] m2 BPS\n"
- "\n"
- " m1 : slope of first segment\n"
- " d : x-coordinate of intersection\n"
- " m2 : slope of second segment\n"
- "\n"
- "Alternative format:\n"
- "\n"
- "SC := [ [ umax BYTE ] dmax SEC ] rate BPS\n"
- "\n"
- " umax : maximum unit of work\n"
- " dmax : maximum delay\n"
- " rate : rate\n"
- "\n"
- );
-}
-
-static void
-explain1(char *arg)
-{
- fprintf(stderr, "HFSC: Illegal \"%s\"\n", arg);
-}
-
-static int
-hfsc_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
-{
- struct tc_hfsc_qopt qopt;
-
- memset(&qopt, 0, sizeof(qopt));
-
- while (argc > 0) {
- if (matches(*argv, "default") == 0) {
- NEXT_ARG();
- if (qopt.defcls != 0) {
- fprintf(stderr, "HFSC: Double \"default\"\n");
- return -1;
- }
- if (get_u16(&qopt.defcls, *argv, 16) < 0) {
- explain1("default");
- return -1;
- }
- } else if (matches(*argv, "help") == 0) {
- explain_qdisc();
- return -1;
- } else {
- fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
- explain_qdisc();
- return -1;
- }
- argc--, argv++;
- }
-
- addattr_l(n, 1024, TCA_OPTIONS, &qopt, sizeof(qopt));
- return 0;
-}
-
-static int
-hfsc_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
-{
- struct tc_hfsc_qopt *qopt;
-
- if (opt == NULL)
- return 0;
- if (RTA_PAYLOAD(opt) < sizeof(*qopt))
- return -1;
- qopt = RTA_DATA(opt);
-
- if (qopt->defcls != 0)
- fprintf(f, "default %x ", qopt->defcls);
-
- return 0;
-}
-
-static int
-hfsc_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
-{
- struct tc_hfsc_stats *st;
-
- if (xstats == NULL)
- return 0;
- if (RTA_PAYLOAD(xstats) < sizeof(*st))
- return -1;
- st = RTA_DATA(xstats);
-
- fprintf(f, " period %u ", st->period);
- if (st->work != 0)
- fprintf(f, "work %llu bytes ", (unsigned long long) st->work);
- if (st->rtwork != 0)
- fprintf(f, "rtwork %llu bytes ", (unsigned long long) st->rtwork);
- fprintf(f, "level %u ", st->level);
- fprintf(f, "\n");
-
- return 0;
-}
-
-static int
-hfsc_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
- struct nlmsghdr *n)
-{
- struct tc_service_curve rsc, fsc, usc;
- int rsc_ok, fsc_ok, usc_ok;
- struct rtattr *tail;
-
- memset(&rsc, 0, sizeof(rsc));
- memset(&fsc, 0, sizeof(fsc));
- memset(&usc, 0, sizeof(usc));
- rsc_ok = fsc_ok = usc_ok = 0;
-
- while (argc > 0) {
- if (matches(*argv, "rt") == 0) {
- NEXT_ARG();
- if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
- explain1("rt");
- return -1;
- }
- rsc_ok = 1;
- } else if (matches(*argv, "ls") == 0) {
- NEXT_ARG();
- if (hfsc_get_sc(&argc, &argv, &fsc) < 0) {
- explain1("ls");
- return -1;
- }
- fsc_ok = 1;
- } else if (matches(*argv, "sc") == 0) {
- NEXT_ARG();
- if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
- explain1("sc");
- return -1;
- }
- memcpy(&fsc, &rsc, sizeof(fsc));
- rsc_ok = 1;
- fsc_ok = 1;
- } else if (matches(*argv, "ul") == 0) {
- NEXT_ARG();
- if (hfsc_get_sc(&argc, &argv, &usc) < 0) {
- explain1("ul");
- return -1;
- }
- usc_ok = 1;
- } else if (matches(*argv, "help") == 0) {
- explain_class();
- return -1;
- } else {
- fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
- explain_class();
- return -1;
- }
- argc--, argv++;
- }
-
- if (!(rsc_ok || fsc_ok || usc_ok)) {
- fprintf(stderr, "HFSC: no parameters given\n");
- explain_class();
- return -1;
- }
- if (usc_ok && !fsc_ok) {
- fprintf(stderr, "HFSC: Upper-limit Service Curve without "
- "Link-Share Service Curve\n");
- explain_class();
- return -1;
- }
-
- tail = NLMSG_TAIL(n);
-
- addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
- if (rsc_ok)
- addattr_l(n, 1024, TCA_HFSC_RSC, &rsc, sizeof(rsc));
- if (fsc_ok)
- addattr_l(n, 1024, TCA_HFSC_FSC, &fsc, sizeof(fsc));
- if (usc_ok)
- addattr_l(n, 1024, TCA_HFSC_USC, &usc, sizeof(usc));
-
- tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
- return 0;
-}
-
-static void
-hfsc_print_sc(FILE *f, char *name, struct tc_service_curve *sc)
-{
- SPRINT_BUF(b1);
-
- fprintf(f, "%s ", name);
- fprintf(f, "m1 %s ", sprint_rate(sc->m1, b1));
- fprintf(f, "d %s ", sprint_usecs(sc->d, b1));
- fprintf(f, "m2 %s ", sprint_rate(sc->m2, b1));
-}
-
-static int
-hfsc_print_class_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
-{
- struct rtattr *tb[TCA_HFSC_MAX+1];
- struct tc_service_curve *rsc = NULL, *fsc = NULL, *usc = NULL;
-
- if (opt == NULL)
- return 0;
-
- parse_rtattr_nested(tb, TCA_HFSC_MAX, opt);
-
- if (tb[TCA_HFSC_RSC]) {
- if (RTA_PAYLOAD(tb[TCA_HFSC_RSC]) < sizeof(*rsc))
- fprintf(stderr, "HFSC: truncated realtime option\n");
- else
- rsc = RTA_DATA(tb[TCA_HFSC_RSC]);
- }
- if (tb[TCA_HFSC_FSC]) {
- if (RTA_PAYLOAD(tb[TCA_HFSC_FSC]) < sizeof(*fsc))
- fprintf(stderr, "HFSC: truncated linkshare option\n");
- else
- fsc = RTA_DATA(tb[TCA_HFSC_FSC]);
- }
- if (tb[TCA_HFSC_USC]) {
- if (RTA_PAYLOAD(tb[TCA_HFSC_USC]) < sizeof(*usc))
- fprintf(stderr, "HFSC: truncated upperlimit option\n");
- else
- usc = RTA_DATA(tb[TCA_HFSC_USC]);
- }
-
-
- if (rsc != NULL && fsc != NULL &&
- memcmp(rsc, fsc, sizeof(*rsc)) == 0)
- hfsc_print_sc(f, "sc", rsc);
- else {
- if (rsc != NULL)
- hfsc_print_sc(f, "rt", rsc);
- if (fsc != NULL)
- hfsc_print_sc(f, "ls", fsc);
- }
- if (usc != NULL)
- hfsc_print_sc(f, "ul", usc);
-
- return 0;
-}
-
-struct qdisc_util hfsc_qdisc_util = {
- .id = "hfsc",
- .parse_qopt = hfsc_parse_opt,
- .print_qopt = hfsc_print_opt,
- .print_xstats = hfsc_print_xstats,
- .parse_copt = hfsc_parse_class_opt,
- .print_copt = hfsc_print_class_opt,
-};
-
-static int
-hfsc_get_sc1(int *argcp, char ***argvp, struct tc_service_curve *sc)
-{
- char **argv = *argvp;
- int argc = *argcp;
- unsigned int m1 = 0, d = 0, m2 = 0;
-
- if (matches(*argv, "m1") == 0) {
- NEXT_ARG();
- if (get_rate(&m1, *argv) < 0) {
- explain1("m1");
- return -1;
- }
- NEXT_ARG();
- }
-
- if (matches(*argv, "d") == 0) {
- NEXT_ARG();
- if (get_usecs(&d, *argv) < 0) {
- explain1("d");
- return -1;
- }
- NEXT_ARG();
- }
-
- if (matches(*argv, "m2") == 0) {
- NEXT_ARG();
- if (get_rate(&m2, *argv) < 0) {
- explain1("m2");
- return -1;
- }
- } else
- return -1;
-
- sc->m1 = m1;
- sc->d = d;
- sc->m2 = m2;
-
- *argvp = argv;
- *argcp = argc;
- return 0;
-}
-
-static int
-hfsc_get_sc2(int *argcp, char ***argvp, struct tc_service_curve *sc)
-{
- char **argv = *argvp;
- int argc = *argcp;
- unsigned int umax = 0, dmax = 0, rate = 0;
-
- if (matches(*argv, "umax") == 0) {
- NEXT_ARG();
- if (get_size(&umax, *argv) < 0) {
- explain1("umax");
- return -1;
- }
- NEXT_ARG();
- }
-
- if (matches(*argv, "dmax") == 0) {
- NEXT_ARG();
- if (get_usecs(&dmax, *argv) < 0) {
- explain1("dmax");
- return -1;
- }
- NEXT_ARG();
- }
-
- if (matches(*argv, "rate") == 0) {
- NEXT_ARG();
- if (get_rate(&rate, *argv) < 0) {
- explain1("rate");
- return -1;
- }
- } else
- return -1;
-
- if (umax != 0 && dmax == 0) {
- fprintf(stderr, "HFSC: umax given but dmax is zero.\n");
- return -1;
- }
-
- if (dmax != 0 && ceil(umax * 1000000.0 / dmax) > rate) {
- /*
- * concave curve, slope of first segment is umax/dmax,
- * intersection is at dmax
- */
- sc->m1 = ceil(umax * 1000000.0 / dmax); /* in bps */
- sc->d = dmax;
- sc->m2 = rate;
- } else {
- /*
- * convex curve, slope of first segment is 0, intersection
- * is at dmax - umax / rate
- */
- sc->m1 = 0;
- sc->d = ceil(dmax - umax * 1000000.0 / rate); /* in usec */
- sc->m2 = rate;
- }
-
- *argvp = argv;
- *argcp = argc;
- return 0;
-}
-
-static int
-hfsc_get_sc(int *argcp, char ***argvp, struct tc_service_curve *sc)
-{
- if (hfsc_get_sc1(argcp, argvp, sc) < 0 &&
- hfsc_get_sc2(argcp, argvp, sc) < 0)
- return -1;
-
- if (sc->m1 == 0 && sc->m2 == 0) {
- fprintf(stderr, "HFSC: Service Curve has two zero slopes\n");
- return -1;
- }
-
- return 0;
-}
git://git.onelab.eu / iproute2.git / blobdiff