tc/q_prio.c

   1 /*
   2  * q_prio.c             PRIO.
   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: ... prio bands NUMBER priomap P1 P2...[multiqueue]\n");
  29 }
  30
  31 #define usage() return(-1)
  32
  33 static int prio_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
  34 {
  35         int ok=0;
  36         int pmap_mode = 0;
  37         int idx = 0;
  38         struct tc_prio_qopt opt={3,{ 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 }};
  39         struct rtattr *nest;
  40         unsigned char mq = 0;
  41
  42         while (argc > 0) {
  43                 if (strcmp(*argv, "bands") == 0) {
  44                         if (pmap_mode)
  45                                 explain();
  46                         NEXT_ARG();
  47                         if (get_integer(&opt.bands, *argv, 10)) {
  48                                 fprintf(stderr, "Illegal \"bands\"\n");
  49                                 return -1;
  50                         }
  51                         ok++;
  52                 } else if (strcmp(*argv, "priomap") == 0) {
  53                         if (pmap_mode) {
  54                                 fprintf(stderr, "Error: duplicate priomap\n");
  55                                 return -1;
  56                         }
  57                         pmap_mode = 1;
  58                 } else if (strcmp(*argv, "multiqueue") == 0) {
  59                         mq = 1;
  60                 } else if (strcmp(*argv, "help") == 0) {
  61                         explain();
  62                         return -1;
  63                 } else {
  64                         unsigned band;
  65                         if (!pmap_mode) {
  66                                 fprintf(stderr, "What is \"%s\"?\n", *argv);
  67                                 explain();
  68                                 return -1;
  69                         }
  70                         if (get_unsigned(&band, *argv, 10)) {
  71                                 fprintf(stderr, "Illegal \"priomap\" element\n");
  72                                 return -1;
  73                         }
  74                         if (band > opt.bands) {
  75                                 fprintf(stderr, "\"priomap\" element is out of bands\n");
  76                                 return -1;
  77                         }
  78                         if (idx > TC_PRIO_MAX) {
  79                                 fprintf(stderr, "\"priomap\" index > TC_PRIO_MAX=%u\n", TC_PRIO_MAX);
  80                                 return -1;
  81                         }
  82                         opt.priomap[idx++] = band;
  83                 }
  84                 argc--; argv++;
  85         }
  86
  87 /*
  88         if (pmap_mode) {
  89                 for (; idx < TC_PRIO_MAX; idx++)
  90                         opt.priomap[idx] = opt.priomap[TC_PRIO_BESTEFFORT];
  91         }
  92 */
  93         nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  94         if (mq)
  95                 addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
  96         addattr_nest_compat_end(n, nest);
  97         return 0;
  98 }
  99
 100 int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 101 {
 102         int i;
 103         struct tc_prio_qopt *qopt;
 104         struct rtattr *tb[TCA_PRIO_MAX+1];
 105
 106         if (opt == NULL)
 107                 return 0;
 108
 109         if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
 110                                         sizeof(*qopt)))
 111                 return -1;
 112
 113         fprintf(f, "bands %u priomap ", qopt->bands);
 114         for (i=0; i<=TC_PRIO_MAX; i++)
 115                 fprintf(f, " %d", qopt->priomap[i]);
 116
 117         if (tb[TCA_PRIO_MQ])
 118                 fprintf(f, " multiqueue: %s ",
 119                     *(unsigned char *)RTA_DATA(tb[TCA_PRIO_MQ]) ? "on" : "off");
 120
 121         return 0;
 122 }
 123
 124 struct qdisc_util prio_qdisc_util = {
 125         .id             = "prio",
 126         .parse_qopt     = prio_parse_opt,
 127         .print_qopt     = prio_print_opt,
 128 };
 129