Blame tc/q_prio.c

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/*
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 * q_prio.c		PRIO.
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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:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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 *
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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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: ... prio bands NUMBER priomap P1 P2...[multiqueue]\n");
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}
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static int prio_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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	int pmap_mode = 0;
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	int idx = 0;
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	struct tc_prio_qopt opt = {3, { 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 } };
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	struct rtattr *nest;
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	unsigned char mq = 0;
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	while (argc > 0) {
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		if (strcmp(*argv, "bands") == 0) {
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			if (pmap_mode)
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				explain();
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			NEXT_ARG();
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			if (get_integer(&opt.bands, *argv, 10)) {
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				fprintf(stderr, "Illegal \"bands\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "priomap") == 0) {
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			if (pmap_mode) {
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				fprintf(stderr, "Error: duplicate priomap\n");
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				return -1;
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			}
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			pmap_mode = 1;
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		} else if (strcmp(*argv, "multiqueue") == 0) {
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			mq = 1;
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		} else if (strcmp(*argv, "help") == 0) {
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			explain();
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			return -1;
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		} else {
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			unsigned int band;
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			if (!pmap_mode) {
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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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			if (get_unsigned(&band, *argv, 10)) {
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				fprintf(stderr, "Illegal \"priomap\" element\n");
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				return -1;
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			}
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			if (band >= opt.bands) {
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				fprintf(stderr, "\"priomap\" element is out of bands\n");
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				return -1;
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			}
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			if (idx > TC_PRIO_MAX) {
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				fprintf(stderr, "\"priomap\" index > TC_PRIO_MAX=%u\n", TC_PRIO_MAX);
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				return -1;
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			}
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			opt.priomap[idx++] = band;
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		}
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		argc--; argv++;
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	}
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/*
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	if (pmap_mode) {
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		for (; idx < TC_PRIO_MAX; idx++)
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			opt.priomap[idx] = opt.priomap[TC_PRIO_BESTEFFORT];
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	}
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*/
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	nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
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	if (mq)
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		addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
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	addattr_nest_compat_end(n, nest);
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	return 0;
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}
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int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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	int i;
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	struct tc_prio_qopt *qopt;
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	struct rtattr *tb[TCA_PRIO_MAX+1];
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	if (opt == NULL)
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		return 0;
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	if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
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					sizeof(*qopt)))
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		return -1;
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	print_uint(PRINT_ANY, "bands", "bands %u ", qopt->bands);
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	open_json_array(PRINT_ANY, "priomap");
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	for (i = 0; i <= TC_PRIO_MAX; i++)
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		print_uint(PRINT_ANY, NULL, " %d", qopt->priomap[i]);
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	close_json_array(PRINT_ANY, "");
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	if (tb[TCA_PRIO_MQ])
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		print_string(PRINT_FP, NULL, " multiqueue: %s ",
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			     rta_getattr_u8(tb[TCA_PRIO_MQ]) ? "on" : "off");
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	print_bool(PRINT_JSON, "multiqueue", NULL,
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		   tb[TCA_PRIO_MQ] && rta_getattr_u8(tb[TCA_PRIO_MQ]));
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	return 0;
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}
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struct qdisc_util prio_qdisc_util = {
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	.id		= "prio",
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	.parse_qopt	= prio_parse_opt,
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	.print_qopt	= prio_print_opt,
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};