LXR iproute2/tc/q

   1/*
   2 * q_fifo.c             FIFO.
   3 *
   4 *              This program is free software; you can redistribute it and/or
   5 *              modify it under the terms of the GNU General Public License
   6 *              as published by the Free Software Foundation; either version
   7 *              2 of the License, or (at your option) any later version.
   8 *
   9 * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10 *
  11 */
  12
  13#include <stdio.h>
  14#include <stdlib.h>
  15#include <unistd.h>
  16#include <fcntl.h>
  17#include <sys/socket.h>
  18#include <netinet/in.h>
  19#include <arpa/inet.h>
  20#include <string.h>
  21
  22#include "utils.h"
  23#include "tc_util.h"
  24
  25static void explain(void)
  26{
  27        fprintf(stderr, "Usage: ... <[p|b]fifo | pfifo_head_drop> [ limit NUMBER ]\n");
  28}
  29
  30static int fifo_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  31                          struct nlmsghdr *n, const char *dev)
  32{
  33        int ok = 0;
  34        struct tc_fifo_qopt opt = {};
  35
  36        while (argc > 0) {
  37                if (strcmp(*argv, "limit") == 0) {
  38                        NEXT_ARG();
  39                        if (get_size(&opt.limit, *argv)) {
  40                                fprintf(stderr, "%s: Illegal value for \"limit\": \"%s\"\n", qu->id, *argv);
  41                                return -1;
  42                        }
  43                        ok++;
  44                } else if (strcmp(*argv, "help") == 0) {
  45                        explain();
  46                        return -1;
  47                } else {
  48                        fprintf(stderr, "%s: unknown parameter \"%s\"\n", qu->id, *argv);
  49                        explain();
  50                        return -1;
  51                }
  52                argc--; argv++;
  53        }
  54
  55        if (ok)
  56                addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  57        return 0;
  58}
  59
  60static int fifo_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  61{
  62        struct tc_fifo_qopt *qopt;
  63
  64        if (opt == NULL)
  65                return 0;
  66
  67        if (RTA_PAYLOAD(opt)  < sizeof(*qopt))
  68                return -1;
  69        qopt = RTA_DATA(opt);
  70        if (strcmp(qu->id, "bfifo") == 0)
  71                print_size(PRINT_ANY, "limit", "limit %s", qopt->limit);
  72        else
  73                print_uint(PRINT_ANY, "limit", "limit %up", qopt->limit);
  74        return 0;
  75}
  76
  77
  78struct qdisc_util bfifo_qdisc_util = {
  79        .id = "bfifo",
  80        .parse_qopt = fifo_parse_opt,
  81        .print_qopt = fifo_print_opt,
  82};
  83
  84struct qdisc_util pfifo_qdisc_util = {
  85        .id = "pfifo",
  86        .parse_qopt = fifo_parse_opt,
  87        .print_qopt = fifo_print_opt,
  88};
  89
  90struct qdisc_util pfifo_head_drop_qdisc_util = {
  91        .id = "pfifo_head_drop",
  92        .parse_qopt = fifo_parse_opt,
  93        .print_qopt = fifo_print_opt,
  94};
  95
  96struct qdisc_util pfifo_fast_qdisc_util = {
  97        .id = "pfifo_fast",
  98        .print_qopt = prio_print_opt,
  99};
 100