Adding upstream version 6.1.0.upstream/6.1.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 238 insertions, 0 deletions

diff --git a/tc/q_choke.c b/tc/q_choke.c
new file mode 100644
index 0000000..570c359
--- /dev/null
+++ b/tc/q_choke.c
@@ -0,0 +1,238 @@
+/*
+ * q_choke.c		CHOKE.
+ *
+ *		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:	Stephen Hemminger <shemminger@vyatta.com>
+ */
+
+#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 <math.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+#include "tc_red.h"
+
+static void explain(void)
+{
+	fprintf(stderr,
+		"Usage: ... choke limit PACKETS bandwidth KBPS [ecn]\n"
+		"		 [ min PACKETS ] [ max PACKETS ] [ burst PACKETS ]\n");
+}
+
+static int choke_parse_opt(struct qdisc_util *qu, int argc, char **argv,
+			   struct nlmsghdr *n, const char *dev)
+{
+	struct tc_red_qopt opt = {};
+	unsigned int burst = 0;
+	unsigned int avpkt = 1000;
+	double probability = 0.02;
+	unsigned int rate = 0;
+	int ecn_ok = 0;
+	int wlog;
+	__u8 sbuf[256];
+	__u32 max_P;
+	struct rtattr *tail;
+
+	while (argc > 0) {
+		if (strcmp(*argv, "limit") == 0) {
+			NEXT_ARG();
+			if (get_unsigned(&opt.limit, *argv, 0)) {
+				fprintf(stderr, "Illegal \"limit\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "bandwidth") == 0) {
+			NEXT_ARG();
+			if (strchr(*argv, '%')) {
+				if (get_percent_rate(&rate, *argv, dev)) {
+					fprintf(stderr, "Illegal \"bandwidth\"\n");
+					return -1;
+				}
+			} else if (get_rate(&rate, *argv)) {
+				fprintf(stderr, "Illegal \"bandwidth\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "ecn") == 0) {
+			ecn_ok = 1;
+		} else if (strcmp(*argv, "min") == 0) {
+			NEXT_ARG();
+			if (get_unsigned(&opt.qth_min, *argv, 0)) {
+				fprintf(stderr, "Illegal \"min\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "max") == 0) {
+			NEXT_ARG();
+			if (get_unsigned(&opt.qth_max, *argv, 0)) {
+				fprintf(stderr, "Illegal \"max\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "burst") == 0) {
+			NEXT_ARG();
+			if (get_unsigned(&burst, *argv, 0)) {
+				fprintf(stderr, "Illegal \"burst\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "avpkt") == 0) {
+			NEXT_ARG();
+			if (get_size(&avpkt, *argv)) {
+				fprintf(stderr, "Illegal \"avpkt\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "probability") == 0) {
+			NEXT_ARG();
+			if (sscanf(*argv, "%lg", &probability) != 1) {
+				fprintf(stderr, "Illegal \"probability\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			fprintf(stderr, "What is \"%s\"?\n", *argv);
+			explain();
+			return -1;
+		}
+		argc--; argv++;
+	}
+
+	if (!rate || !opt.limit) {
+		fprintf(stderr, "Required parameter (bandwidth, limit) 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;
+
+	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;
+	}
+
+	wlog = tc_red_eval_ewma(opt.qth_min*avpkt, burst, avpkt);
+	if (wlog < 0) {
+		fprintf(stderr, "CHOKE: failed to calculate EWMA constant.\n");
+		return -1;
+	}
+	if (wlog >= 10)
+		fprintf(stderr, "CHOKE: WARNING. Burst %d seems to be too large.\n", burst);
+	opt.Wlog = wlog;
+
+	wlog = tc_red_eval_P(opt.qth_min*avpkt, opt.qth_max*avpkt, probability);
+	if (wlog < 0) {
+		fprintf(stderr, "CHOKE: failed to calculate probability.\n");
+		return -1;
+	}
+	opt.Plog = wlog;
+
+	wlog = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf);
+	if (wlog < 0) {
+		fprintf(stderr, "CHOKE: failed to calculate idle damping table.\n");
+		return -1;
+	}
+	opt.Scell_log = wlog;
+	if (ecn_ok)
+		opt.flags |= TC_RED_ECN;
+
+	tail = addattr_nest(n, 1024, TCA_OPTIONS);
+	addattr_l(n, 1024, TCA_CHOKE_PARMS, &opt, sizeof(opt));
+	addattr_l(n, 1024, TCA_CHOKE_STAB, sbuf, 256);
+	max_P = probability * pow(2, 32);
+	addattr_l(n, 1024, TCA_CHOKE_MAX_P, &max_P, sizeof(max_P));
+	addattr_nest_end(n, tail);
+	return 0;
+}
+
+static int choke_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+	struct rtattr *tb[TCA_CHOKE_MAX+1];
+	const struct tc_red_qopt *qopt;
+	__u32 max_P = 0;
+
+	if (opt == NULL)
+		return 0;
+
+	parse_rtattr_nested(tb, TCA_CHOKE_MAX, opt);
+
+	if (tb[TCA_CHOKE_PARMS] == NULL)
+		return -1;
+	qopt = RTA_DATA(tb[TCA_CHOKE_PARMS]);
+	if (RTA_PAYLOAD(tb[TCA_CHOKE_PARMS])  < sizeof(*qopt))
+		return -1;
+	if (tb[TCA_CHOKE_MAX_P] &&
+	    RTA_PAYLOAD(tb[TCA_CHOKE_MAX_P]) >= sizeof(__u32))
+		max_P = rta_getattr_u32(tb[TCA_CHOKE_MAX_P]);
+
+	print_uint(PRINT_ANY, "limit", "limit %up ", qopt->limit);
+	print_uint(PRINT_ANY, "min", "min %up ", qopt->qth_min);
+	print_uint(PRINT_ANY, "max", "max %up ", qopt->qth_max);
+
+	tc_red_print_flags(qopt->flags);
+
+	if (show_details) {
+		print_uint(PRINT_ANY, "ewma", "ewma %u ", qopt->Wlog);
+
+		if (max_P)
+			print_float(PRINT_ANY, "probability",
+				    "probability %lg ", max_P / pow(2, 32));
+		else
+			print_uint(PRINT_ANY, "Plog", "Plog %u ", qopt->Plog);
+
+		print_uint(PRINT_ANY, "Scell_log", "Scell_log %u",
+			   qopt->Scell_log);
+	}
+	return 0;
+}
+
+static int choke_print_xstats(struct qdisc_util *qu, FILE *f,
+			      struct rtattr *xstats)
+{
+	struct tc_choke_xstats *st;
+
+	if (xstats == NULL)
+		return 0;
+
+	if (RTA_PAYLOAD(xstats) < sizeof(*st))
+		return -1;
+
+	st = RTA_DATA(xstats);
+
+	print_uint(PRINT_ANY, "marked", "  marked %u", st->marked);
+	print_uint(PRINT_ANY, "early", " early %u", st->early);
+	print_uint(PRINT_ANY, "pdrop", " pdrop %u", st->pdrop);
+	print_uint(PRINT_ANY, "other", " other %u", st->other);
+	print_uint(PRINT_ANY, "matched", " matched %u", st->matched);
+
+	return 0;
+
+}
+
+struct qdisc_util choke_qdisc_util = {
+	.id		= "choke",
+	.parse_qopt	= choke_parse_opt,
+	.print_qopt	= choke_print_opt,
+	.print_xstats	= choke_print_xstats,
+};