LXR iproute2/tc/q

   1/*
   2 * q_rr.c               RR.
   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:     PJ Waskiewicz, <peter.p.waskiewicz.jr@intel.com>
  10 * Original Authors:    Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> (from PRIO)
  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: ... rr bands NUMBER priomap P1 P2... [multiqueue]\n");
  28}
  29
  30
  31static int rr_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
  32{
  33        int pmap_mode = 0;
  34        int idx = 0;
  35        struct tc_prio_qopt opt = {3, { 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 } };
  36        struct rtattr *nest;
  37        unsigned char mq = 0;
  38
  39        while (argc > 0) {
  40                if (strcmp(*argv, "bands") == 0) {
  41                        if (pmap_mode)
  42                                explain();
  43                        NEXT_ARG();
  44                        if (get_integer(&opt.bands, *argv, 10)) {
  45                                fprintf(stderr, "Illegal \"bands\"\n");
  46                                return -1;
  47                        }
  48                } else if (strcmp(*argv, "priomap") == 0) {
  49                        if (pmap_mode) {
  50                                fprintf(stderr, "Error: duplicate priomap\n");
  51                                return -1;
  52                        }
  53                        pmap_mode = 1;
  54                } else if (strcmp(*argv, "help") == 0) {
  55                        explain();
  56                        return -1;
  57                } else if (strcmp(*argv, "multiqueue") == 0) {
  58                        mq = 1;
  59                } else {
  60                        unsigned int band;
  61
  62                        if (!pmap_mode) {
  63                                fprintf(stderr, "What is \"%s\"?\n", *argv);
  64                                explain();
  65                                return -1;
  66                        }
  67                        if (get_unsigned(&band, *argv, 10)) {
  68                                fprintf(stderr, "Illegal \"priomap\" element\n");
  69                                return -1;
  70                        }
  71                        if (band > opt.bands) {
  72                                fprintf(stderr, "\"priomap\" element is out of bands\n");
  73                                return -1;
  74                        }
  75                        if (idx > TC_PRIO_MAX) {
  76                                fprintf(stderr, "\"priomap\" index > TC_RR_MAX=%u\n", TC_PRIO_MAX);
  77                                return -1;
  78                        }
  79                        opt.priomap[idx++] = band;
  80                }
  81                argc--; argv++;
  82        }
  83
  84        nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  85        if (mq)
  86                addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
  87        addattr_nest_compat_end(n, nest);
  88        return 0;
  89}
  90
  91static int rr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  92{
  93        int i;
  94        struct tc_prio_qopt *qopt;
  95        struct rtattr *tb[TCA_PRIO_MAX + 1];
  96
  97        if (opt == NULL)
  98                return 0;
  99
 100        if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
 101                                                sizeof(*qopt)))
 102                return -1;
 103
 104        fprintf(f, "bands %u priomap ", qopt->bands);
 105        for (i = 0; i <= TC_PRIO_MAX; i++)
 106                fprintf(f, " %d", qopt->priomap[i]);
 107
 108        if (tb[TCA_PRIO_MQ])
 109                fprintf(f, " multiqueue: %s ",
 110                        rta_getattr_u8(tb[TCA_PRIO_MQ]) ? "on" : "off");
 111
 112        return 0;
 113}
 114
 115struct qdisc_util rr_qdisc_util = {
 116        .id             = "rr",
 117        .parse_qopt     = rr_parse_opt,
 118        .print_qopt     = rr_print_opt,
 119};
 120