LXR iproute2/tc/q

   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
  37static void explain(void)
  38{
  39        fprintf(stderr, "Usage: ... multiq [help]\n");
  40}
  41
  42static 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
  62static 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
  78struct qdisc_util multiq_qdisc_util = {
  79        .id             = "multiq",
  80        .parse_qopt     = multiq_parse_opt,
  81        .print_qopt     = multiq_print_opt,
  82};
  83