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      1 /*
      2  * q_multiq.c		Multiqueue aware qdisc
      3  *
      4  * Copyright (c) 2008, Intel Corporation.
      5  *
      6  * This program is free software; you can redistribute it and/or modify it
      7  * under the terms and conditions of the GNU General Public License,
      8  * version 2, as published by the Free Software Foundation.
      9  *
     10  * This program is distributed in the hope it will be useful, but WITHOUT
     11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
     13  * more details.
     14  *
     15  * You should have received a copy of the GNU General Public License
     16  * along with this program; if not, see <http://www.gnu.org/licenses>.
     17  *
     18  * Author: Alexander Duyck <alexander.h.duyck (at) intel.com>
     19  *
     20  * Original Authors:	PJ Waskiewicz, <peter.p.waskiewicz.jr (at) intel.com> (RR)
     21  *			Alexey Kuznetsov, <kuznet (at) ms2.inr.ac.ru> (from PRIO)
     22  *
     23  */
     24 
     25 #include <stdio.h>
     26 #include <stdlib.h>
     27 #include <unistd.h>
     28 #include <syslog.h>
     29 #include <fcntl.h>
     30 #include <sys/socket.h>
     31 #include <netinet/in.h>
     32 #include <arpa/inet.h>
     33 #include <string.h>
     34 
     35 #include "utils.h"
     36 #include "tc_util.h"
     37 
     38 static void explain(void)
     39 {
     40 	fprintf(stderr, "Usage: ... multiq [help]\n");
     41 }
     42 
     43 static int multiq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
     44 			    struct nlmsghdr *n)
     45 {
     46 	struct tc_multiq_qopt opt = {};
     47 
     48 	if (argc) {
     49 		if (strcmp(*argv, "help") == 0) {
     50 			explain();
     51 			return -1;
     52 		} else {
     53 			fprintf(stderr, "What is \"%s\"?\n", *argv);
     54 			explain();
     55 			return -1;
     56 		}
     57 	}
     58 
     59 	addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
     60 	return 0;
     61 }
     62 
     63 static int multiq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
     64 {
     65 	struct tc_multiq_qopt *qopt;
     66 
     67 	if (opt == NULL)
     68 		return 0;
     69 	if (RTA_PAYLOAD(opt) < sizeof(*qopt))
     70 		return 0;
     71 
     72 	qopt = RTA_DATA(opt);
     73 
     74 	fprintf(f, "bands %u/%u ", qopt->bands, qopt->max_bands);
     75 
     76 	return 0;
     77 }
     78 
     79 struct qdisc_util multiq_qdisc_util = {
     80 	.id		= "multiq",
     81 	.parse_qopt	= multiq_parse_opt,
     82 	.print_qopt	= multiq_print_opt,
     83 };
     84