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,
  31                           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, "multiqueue") == 0) {
  55                         mq = 1;
  56                 } else if (strcmp(*argv, "help") == 0) {
  57                         explain();
  58                         return -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_PRIO_MAX=%u\n", TC_PRIO_MAX);
  77                                 return -1;
  78                         }
  79                         opt.priomap[idx++] = band;
  80                 }
  81                 argc--; argv++;
  82         }
  83
  84 /*
  85         if (pmap_mode) {
  86                 for (; idx < TC_PRIO_MAX; idx++)
  87                         opt.priomap[idx] = opt.priomap[TC_PRIO_BESTEFFORT];
  88         }
  89 */
  90         nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  91         if (mq)
  92                 addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
  93         addattr_nest_compat_end(n, nest);
  94         return 0;
  95 }
  96
  97 int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  98 {
  99         int i;
 100         struct tc_prio_qopt *qopt;
 101         struct rtattr *tb[TCA_PRIO_MAX+1];
 102
 103         if (opt == NULL)
 104                 return 0;
 105
 106         if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
 107                                         sizeof(*qopt)))
 108                 return -1;
 109
 110         print_uint(PRINT_ANY, "bands", "bands %u ", qopt->bands);
 111         open_json_array(PRINT_ANY, "priomap");
 112         for (i = 0; i <= TC_PRIO_MAX; i++)
 113                 print_uint(PRINT_ANY, NULL, " %d", qopt->priomap[i]);
 114         close_json_array(PRINT_ANY, "");
 115
 116         if (tb[TCA_PRIO_MQ])
 117                 print_string(PRINT_FP, NULL, " multiqueue: %s ",
 118                              rta_getattr_u8(tb[TCA_PRIO_MQ]) ? "on" : "off");
 119         print_bool(PRINT_JSON, "multiqueue", NULL,
 120                    tb[TCA_PRIO_MQ] && rta_getattr_u8(tb[TCA_PRIO_MQ]));
 121
 122         return 0;
 123 }
 124
 125 struct qdisc_util prio_qdisc_util = {
 126         .id             = "prio",
 127         .parse_qopt     = prio_parse_opt,
 128         .print_qopt     = prio_print_opt,
 129 };