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 <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
  25 static void explain(void)
  26 {
  27         fprintf(stderr, "Usage: ... prio bands NUMBER priomap P1 P2...[multiqueue]\n");
  28 }
  29
  30 static int prio_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
  31 {
  32         int pmap_mode = 0;
  33         int idx = 0;
  34         struct tc_prio_qopt opt = {3, { 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 } };
  35         struct rtattr *nest;
  36         unsigned char mq = 0;
  37
  38         while (argc > 0) {
  39                 if (strcmp(*argv, "bands") == 0) {
  40                         if (pmap_mode)
  41                                 explain();
  42                         NEXT_ARG();
  43                         if (get_integer(&opt.bands, *argv, 10)) {
  44                                 fprintf(stderr, "Illegal \"bands\"\n");
  45                                 return -1;
  46                         }
  47                 } else if (strcmp(*argv, "priomap") == 0) {
  48                         if (pmap_mode) {
  49                                 fprintf(stderr, "Error: duplicate priomap\n");
  50                                 return -1;
  51                         }
  52                         pmap_mode = 1;
  53                 } else if (strcmp(*argv, "multiqueue") == 0) {
  54                         mq = 1;
  55                 } else if (strcmp(*argv, "help") == 0) {
  56                         explain();
  57                         return -1;
  58                 } else {
  59                         unsigned int band;
  60
  61                         if (!pmap_mode) {
  62                                 fprintf(stderr, "What is \"%s\"?\n", *argv);
  63                                 explain();
  64                                 return -1;
  65                         }
  66                         if (get_unsigned(&band, *argv, 10)) {
  67                                 fprintf(stderr, "Illegal \"priomap\" element\n");
  68                                 return -1;
  69                         }
  70                         if (band >= opt.bands) {
  71                                 fprintf(stderr, "\"priomap\" element is out of bands\n");
  72                                 return -1;
  73                         }
  74                         if (idx > TC_PRIO_MAX) {
  75                                 fprintf(stderr, "\"priomap\" index > TC_PRIO_MAX=%u\n", TC_PRIO_MAX);
  76                                 return -1;
  77                         }
  78                         opt.priomap[idx++] = band;
  79                 }
  80                 argc--; argv++;
  81         }
  82
  83 /*
  84         if (pmap_mode) {
  85                 for (; idx < TC_PRIO_MAX; idx++)
  86                         opt.priomap[idx] = opt.priomap[TC_PRIO_BESTEFFORT];
  87         }
  88 */
  89         nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  90         if (mq)
  91                 addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
  92         addattr_nest_compat_end(n, nest);
  93         return 0;
  94 }
  95
  96 int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  97 {
  98         int i;
  99         struct tc_prio_qopt *qopt;
 100         struct rtattr *tb[TCA_PRIO_MAX+1];
 101
 102         if (opt == NULL)
 103                 return 0;
 104
 105         if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
 106                                         sizeof(*qopt)))
 107                 return -1;
 108
 109         fprintf(f, "bands %u priomap ", qopt->bands);
 110         for (i = 0; i <= TC_PRIO_MAX; i++)
 111                 fprintf(f, " %d", qopt->priomap[i]);
 112
 113         if (tb[TCA_PRIO_MQ])
 114                 fprintf(f, " multiqueue: %s ",
 115                         rta_getattr_u8(tb[TCA_PRIO_MQ]) ? "on" : "off");
 116
 117         return 0;
 118 }
 119
 120 struct qdisc_util prio_qdisc_util = {
 121         .id             = "prio",
 122         .parse_qopt     = prio_parse_opt,
 123         .print_qopt     = prio_print_opt,
 124 };