tc/q_fifo.c

   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 <syslog.h>
  17 #include <fcntl.h>
  18 #include <sys/socket.h>
  19 #include <netinet/in.h>
  20 #include <arpa/inet.h>
  21 #include <string.h>
  22
  23 #include "utils.h"
  24 #include "tc_util.h"
  25
  26 static void explain(void)
  27 {
  28         fprintf(stderr, "Usage: ... [p|b]fifo [ limit NUMBER ]\n");
  29 }
  30
  31 #define usage() return(-1)
  32
  33 static int fifo_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
  34 {
  35         int ok=0;
  36         struct tc_fifo_qopt opt;
  37         memset(&opt, 0, sizeof(opt));
  38
  39         while (argc > 0) {
  40                 if (strcmp(*argv, "limit") == 0) {
  41                         NEXT_ARG();
  42                         if (get_size(&opt.limit, *argv)) {
  43                                 fprintf(stderr, "Illegal \"limit\"\n");
  44                                 return -1;
  45                         }
  46                         ok++;
  47                 } else if (strcmp(*argv, "help") == 0) {
  48                         explain();
  49                         return -1;
  50                 } else {
  51                         fprintf(stderr, "What is \"%s\"?\n", *argv);
  52                         explain();
  53                         return -1;
  54                 }
  55                 argc--; argv++;
  56         }
  57
  58         if (ok)
  59                 addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  60         return 0;
  61 }
  62
  63 static int fifo_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  64 {
  65         struct tc_fifo_qopt *qopt;
  66
  67         if (opt == NULL)
  68                 return 0;
  69
  70         if (RTA_PAYLOAD(opt)  < sizeof(*qopt))
  71                 return -1;
  72         qopt = RTA_DATA(opt);
  73         if (strcmp(qu->id, "bfifo") == 0) {
  74                 SPRINT_BUF(b1);
  75                 fprintf(f, "limit %s", sprint_size(qopt->limit, b1));
  76         } else
  77                 fprintf(f, "limit %up", qopt->limit);
  78         return 0;
  79 }
  80
  81 static int fifo_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
  82 {
  83         return 0;
  84 }
  85
  86
  87 struct qdisc_util bfifo_util = {
  88         NULL,
  89         "bfifo",
  90         fifo_parse_opt,
  91         fifo_print_opt,
  92         fifo_print_xstats,
  93 };
  94
  95 struct qdisc_util pfifo_util = {
  96         NULL,
  97         "pfifo",
  98         fifo_parse_opt,
  99         fifo_print_opt,
 100         fifo_print_xstats,
 101 };
 102
 103 extern int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt);
 104 struct qdisc_util pfifo_fast_util = {
 105         NULL,
 106         "pfifo_fast",
 107         NULL,
 108         prio_print_opt,
 109         fifo_print_xstats,
 110 };