tc/q_multiq.c

   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@intel.com>
  19  *
  20  * Original Authors:    PJ Waskiewicz, <peter.p.waskiewicz.jr@intel.com> (RR)
  21  *                      Alexey Kuznetsov, <kuznet@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 };