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 <fcntl.h>
  29 #include <sys/socket.h>
  30 #include <netinet/in.h>
  31 #include <arpa/inet.h>
  32 #include <string.h>
  33
  34 #include "utils.h"
  35 #include "tc_util.h"
  36
  37 static void explain(void)
  38 {
  39         fprintf(stderr, "Usage: ... multiq [help]\n");
  40 }
  41
  42 static int multiq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  43                             struct nlmsghdr *n, const char *dev)
  44 {
  45         struct tc_multiq_qopt opt = {};
  46
  47         if (argc) {
  48                 if (strcmp(*argv, "help") == 0) {
  49                         explain();
  50                         return -1;
  51                 } else {
  52                         fprintf(stderr, "What is \"%s\"?\n", *argv);
  53                         explain();
  54                         return -1;
  55                 }
  56         }
  57
  58         addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  59         return 0;
  60 }
  61
  62 static int multiq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  63 {
  64         struct tc_multiq_qopt *qopt;
  65
  66         if (opt == NULL)
  67                 return 0;
  68         if (RTA_PAYLOAD(opt) < sizeof(*qopt))
  69                 return 0;
  70
  71         qopt = RTA_DATA(opt);
  72
  73         fprintf(f, "bands %u/%u ", qopt->bands, qopt->max_bands);
  74
  75         return 0;
  76 }
  77
  78 struct qdisc_util multiq_qdisc_util = {
  79         .id             = "multiq",
  80         .parse_qopt     = multiq_parse_opt,
  81         .print_qopt     = multiq_print_opt,
  82 };