LXR iproute2/tc/q

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * q_log.c              plug scheduler
   4 *
   5 * Copyright (C) 2019   Paolo Abeni <pabeni@redhat.com>
   6 */
   7
   8#include <stdio.h>
   9#include <stdlib.h>
  10#include <unistd.h>
  11#include <fcntl.h>
  12#include <sys/socket.h>
  13#include <netinet/in.h>
  14#include <arpa/inet.h>
  15#include <string.h>
  16
  17#include "utils.h"
  18#include "tc_util.h"
  19
  20static void explain(void)
  21{
  22        fprintf(stderr, "Usage: ... plug [block | release | release_indefinite | limit NUMBER]\n");
  23}
  24
  25static int plug_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  26                          struct nlmsghdr *n, const char *dev)
  27{
  28        struct tc_plug_qopt opt = {};
  29        int ok = 0;
  30
  31        while (argc > 0) {
  32                if (strcmp(*argv, "block") == 0) {
  33                        opt.action = TCQ_PLUG_BUFFER;
  34                        ok++;
  35                } else if (strcmp(*argv, "release") == 0) {
  36                        opt.action = TCQ_PLUG_RELEASE_ONE;
  37                        ok++;
  38                } else if (strcmp(*argv, "release_indefinite") == 0) {
  39                        opt.action = TCQ_PLUG_RELEASE_INDEFINITE;
  40                        ok++;
  41                } else if (strcmp(*argv, "limit") == 0) {
  42                        opt.action = TCQ_PLUG_LIMIT;
  43                        NEXT_ARG();
  44                        if (get_size(&opt.limit, *argv)) {
  45                                fprintf(stderr, "Illegal value for \"limit\": \"%s\"\n", *argv);
  46                                return -1;
  47                        }
  48                        ok++;
  49                } else if (strcmp(*argv, "help") == 0) {
  50                        explain();
  51                        return -1;
  52                } else {
  53                        fprintf(stderr, "%s: unknown parameter \"%s\"\n", qu->id, *argv);
  54                        explain();
  55                        return -1;
  56                }
  57                argc--; argv++;
  58        }
  59
  60        if (ok)
  61                addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  62        return 0;
  63}
  64
  65static int plug_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  66{
  67        /* dummy implementation as sch_plug does not implement a dump op */
  68        return 0;
  69}
  70
  71
  72struct qdisc_util plug_qdisc_util = {
  73        .id = "plug",
  74        .parse_qopt = plug_parse_opt,
  75        .print_qopt = plug_print_opt,
  76};
  77