Blame tc/q_qfq.c

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/*
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 * q_qfq.c	QFQ.
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 *
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 *		This program is free software; you can redistribute it and/or
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 *		modify it under the terms of the GNU General Public License
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 *		as published by the Free Software Foundation; either version
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 *		2 of the License, or (at your option) any later version.
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 *
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 * Authors:	Stephen Hemminger <shemminger@vyatta.com>
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 *		Fabio Checconi <fabio@gandalf.sssup.it>
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 *
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 */
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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static void explain(void)
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{
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	fprintf(stderr, "Usage: ... qfq\n");
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}
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static void explain1(const char *arg)
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{
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	fprintf(stderr, "Illegal \"%s\"\n", arg);
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}
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static void explain_class(void)
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{
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	fprintf(stderr, "Usage: ... qfq weight NUMBER maxpkt BYTES\n");
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}
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static int qfq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
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			 struct nlmsghdr *n, const char *dev)
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{
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	if (argc > 0) {
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		if (matches(*argv, "help") != 0)
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			fprintf(stderr, "What is \"%s\"?\n", *argv);
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		explain();
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		return -1;
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	}
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	return 0;
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}
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static int qfq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
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			       struct nlmsghdr *n, const char *dev)
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{
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	struct rtattr *tail;
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	__u32 tmp;
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	tail = addattr_nest(n, 4096, TCA_OPTIONS);
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	while (argc > 0) {
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		if (matches(*argv, "weight") == 0) {
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			NEXT_ARG();
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			if (get_u32(&tmp, *argv, 10)) {
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				explain1("weight"); return -1;
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			}
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			addattr32(n, 4096, TCA_QFQ_WEIGHT, tmp);
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		} else if (matches(*argv, "maxpkt") == 0) {
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			NEXT_ARG();
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			if (get_u32(&tmp, *argv, 10)) {
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				explain1("maxpkt"); return -1;
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			}
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			addattr32(n, 4096, TCA_QFQ_LMAX, tmp);
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		} else if (strcmp(*argv, "help") == 0) {
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			explain_class();
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			return -1;
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		} else {
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			fprintf(stderr, "What is \"%s\"?\n", *argv);
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			explain_class();
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			return -1;
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		}
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		argc--; argv++;
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	}
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	addattr_nest_end(n, tail);
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	return 0;
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}
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static int qfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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	struct rtattr *tb[TCA_QFQ_MAX + 1];
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	if (opt == NULL)
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		return 0;
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	parse_rtattr_nested(tb, TCA_QFQ_MAX, opt);
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	if (tb[TCA_QFQ_WEIGHT]) {
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		fprintf(f, "weight %u ",
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			rta_getattr_u32(tb[TCA_QFQ_WEIGHT]));
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	}
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	if (tb[TCA_QFQ_LMAX]) {
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		fprintf(f, "maxpkt %u ",
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			rta_getattr_u32(tb[TCA_QFQ_LMAX]));
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	}
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	return 0;
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}
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struct qdisc_util qfq_qdisc_util = {
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	.id		= "qfq",
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	.parse_qopt	= qfq_parse_opt,
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	.print_qopt	= qfq_print_opt,
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	.parse_copt	= qfq_parse_class_opt,
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	.print_copt	= qfq_print_opt,
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};