#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"
static void explain(void)
{
fprintf(stderr, "Usage: ... sfq [ limit NUMBER ] [ perturb SECS ] [ quantum BYTES ]\n");
- fprintf(stderr, " [ divisor NUMBER ]\n");
+ fprintf(stderr, " [ divisor NUMBER ] [ flows NUMBER] [ depth NUMBER ]\n");
+ fprintf(stderr, " [ headdrop ]\n");
+ fprintf(stderr, " [ redflowlimit BYTES ] [ min BYTES ] [ max BYTES ]\n");
+ fprintf(stderr, " [ avpkt BYTES ] [ burst PACKETS ] [ probability P ]\n");
+ fprintf(stderr, " [ ecn ] [ harddrop ]\n");
}
-static int sfq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
+static int sfq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
{
- int ok=0;
- struct tc_sfq_qopt opt;
-
- memset(&opt, 0, sizeof(opt));
+ int ok = 0, red = 0;
+ struct tc_sfq_qopt_v1 opt = {};
+ unsigned int burst = 0;
+ int wlog;
+ unsigned int avpkt = 1000;
+ double probability = 0.02;
while (argc > 0) {
if (strcmp(*argv, "quantum") == 0) {
NEXT_ARG();
- if (get_size(&opt.quantum, *argv)) {
+ if (get_size(&opt.v0.quantum, *argv)) {
fprintf(stderr, "Illegal \"limit\"\n");
return -1;
}
ok++;
} else if (strcmp(*argv, "perturb") == 0) {
NEXT_ARG();
- if (get_integer(&opt.perturb_period, *argv, 0)) {
+ if (get_integer(&opt.v0.perturb_period, *argv, 0)) {
fprintf(stderr, "Illegal \"perturb\"\n");
return -1;
}
ok++;
} else if (strcmp(*argv, "limit") == 0) {
NEXT_ARG();
- if (get_u32(&opt.limit, *argv, 0)) {
+ if (get_u32(&opt.v0.limit, *argv, 0)) {
fprintf(stderr, "Illegal \"limit\"\n");
return -1;
}
- if (opt.limit < 2) {
+ if (opt.v0.limit < 2) {
fprintf(stderr, "Illegal \"limit\", must be > 1\n");
return -1;
}
ok++;
} else if (strcmp(*argv, "divisor") == 0) {
NEXT_ARG();
- if (get_u32(&opt.divisor, *argv, 0)) {
+ if (get_u32(&opt.v0.divisor, *argv, 0)) {
fprintf(stderr, "Illegal \"divisor\"\n");
return -1;
}
ok++;
+ } else if (strcmp(*argv, "flows") == 0) {
+ NEXT_ARG();
+ if (get_u32(&opt.v0.flows, *argv, 0)) {
+ fprintf(stderr, "Illegal \"flows\"\n");
+ return -1;
+ }
+ ok++;
+ } else if (strcmp(*argv, "depth") == 0) {
+ NEXT_ARG();
+ if (get_u32(&opt.depth, *argv, 0)) {
+ fprintf(stderr, "Illegal \"flows\"\n");
+ return -1;
+ }
+ ok++;
+ } else if (strcmp(*argv, "headdrop") == 0) {
+ opt.headdrop = 1;
+ ok++;
+ } else if (strcmp(*argv, "redflowlimit") == 0) {
+ NEXT_ARG();
+ if (get_u32(&opt.limit, *argv, 0)) {
+ fprintf(stderr, "Illegal \"redflowlimit\"\n");
+ return -1;
+ }
+ red++;
+ } else if (strcmp(*argv, "min") == 0) {
+ NEXT_ARG();
+ if (get_u32(&opt.qth_min, *argv, 0)) {
+ fprintf(stderr, "Illegal \"min\"\n");
+ return -1;
+ }
+ red++;
+ } else if (strcmp(*argv, "max") == 0) {
+ NEXT_ARG();
+ if (get_u32(&opt.qth_max, *argv, 0)) {
+ fprintf(stderr, "Illegal \"max\"\n");
+ return -1;
+ }
+ red++;
+ } else if (strcmp(*argv, "burst") == 0) {
+ NEXT_ARG();
+ if (get_unsigned(&burst, *argv, 0)) {
+ fprintf(stderr, "Illegal \"burst\"\n");
+ return -1;
+ }
+ red++;
+ } else if (strcmp(*argv, "avpkt") == 0) {
+ NEXT_ARG();
+ if (get_size(&avpkt, *argv)) {
+ fprintf(stderr, "Illegal \"avpkt\"\n");
+ return -1;
+ }
+ red++;
+ } else if (strcmp(*argv, "probability") == 0) {
+ NEXT_ARG();
+ if (sscanf(*argv, "%lg", &probability) != 1) {
+ fprintf(stderr, "Illegal \"probability\"\n");
+ return -1;
+ }
+ red++;
+ } else if (strcmp(*argv, "ecn") == 0) {
+ opt.flags |= TC_RED_ECN;
+ red++;
+ } else if (strcmp(*argv, "harddrop") == 0) {
+ opt.flags |= TC_RED_HARDDROP;
+ red++;
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
}
argc--; argv++;
}
+ if (red) {
+ if (!opt.limit) {
+ fprintf(stderr, "Required parameter (redflowlimit) is missing\n");
+ return -1;
+ }
+ /* Compute default min/max thresholds based on
+ Sally Floyd's recommendations:
+ http://www.icir.org/floyd/REDparameters.txt
+ */
+ if (!opt.qth_max)
+ opt.qth_max = opt.limit / 4;
+ if (!opt.qth_min)
+ opt.qth_min = opt.qth_max / 3;
+ if (!burst)
+ burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
+
+ if (opt.qth_max > opt.limit) {
+ fprintf(stderr, "\"max\" is larger than \"limit\"\n");
+ return -1;
+ }
+
+ if (opt.qth_min >= opt.qth_max) {
+ fprintf(stderr, "\"min\" is not smaller than \"max\"\n");
+ return -1;
+ }
- if (ok)
+ wlog = tc_red_eval_ewma(opt.qth_min, burst, avpkt);
+ if (wlog < 0) {
+ fprintf(stderr, "SFQ: failed to calculate EWMA constant.\n");
+ return -1;
+ }
+ if (wlog >= 10)
+ fprintf(stderr, "SFQ: WARNING. Burst %u seems to be too large.\n", burst);
+ opt.Wlog = wlog;
+
+ wlog = tc_red_eval_P(opt.qth_min, opt.qth_max, probability);
+ if (wlog < 0) {
+ fprintf(stderr, "SFQ: failed to calculate probability.\n");
+ return -1;
+ }
+ opt.Plog = wlog;
+ opt.max_P = probability * pow(2, 32);
+ }
+
+ if (ok || red)
addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
return 0;
}
static int sfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct tc_sfq_qopt *qopt;
- SPRINT_BUF(b1);
+ struct tc_sfq_qopt_v1 *qopt_ext = NULL;
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b2);
+ SPRINT_BUF(b3);
if (opt == NULL)
return 0;
if (RTA_PAYLOAD(opt) < sizeof(*qopt))
return -1;
+ if (RTA_PAYLOAD(opt) >= sizeof(*qopt_ext))
+ qopt_ext = RTA_DATA(opt);
qopt = RTA_DATA(opt);
fprintf(f, "limit %up ", qopt->limit);
fprintf(f, "quantum %s ", sprint_size(qopt->quantum, b1));
+ if (qopt_ext && qopt_ext->depth)
+ fprintf(f, "depth %u ", qopt_ext->depth);
+ if (qopt_ext && qopt_ext->headdrop)
+ fprintf(f, "headdrop ");
+
if (show_details) {
fprintf(f, "flows %u/%u ", qopt->flows, qopt->divisor);
}
fprintf(f, "divisor %u ", qopt->divisor);
if (qopt->perturb_period)
fprintf(f, "perturb %dsec ", qopt->perturb_period);
+ if (qopt_ext && qopt_ext->qth_min) {
+ fprintf(f, "\n ewma %u ", qopt_ext->Wlog);
+ fprintf(f, "min %s max %s probability %g ",
+ sprint_size(qopt_ext->qth_min, b2),
+ sprint_size(qopt_ext->qth_max, b3),
+ qopt_ext->max_P / pow(2, 32));
+ tc_red_print_flags(qopt_ext->flags);
+ if (show_stats) {
+ fprintf(f, "\n prob_mark %u prob_mark_head %u prob_drop %u",
+ qopt_ext->stats.prob_mark,
+ qopt_ext->stats.prob_mark_head,
+ qopt_ext->stats.prob_drop);
+ fprintf(f, "\n forced_mark %u forced_mark_head %u forced_drop %u",
+ qopt_ext->stats.forced_mark,
+ qopt_ext->stats.forced_mark_head,
+ qopt_ext->stats.forced_drop);
+ }
+ }
return 0;
}
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