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  * Changes:
  12  *
  13  * Ole Husgaard <sparre@login.dknet.dk>: 990513: prio2band map was always reset.
  14  * J Hadi Salim <hadi@cyberus.ca>: 990609: priomap fix.
  15  */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <syslog.h>
  21 #include <fcntl.h>
  22 #include <sys/socket.h>
  23 #include <netinet/in.h>
  24 #include <arpa/inet.h>
  25 #include <string.h>
  26
  27 #include "utils.h"
  28 #include "tc_util.h"
  29
  30 static void explain(void)
  31 {
  32         fprintf(stderr, "Usage: ... prio bands NUMBER priomap P1 P2...[multiqueue]\n");
  33 }
  34
  35 #define usage() return(-1)
  36
  37 static int prio_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
  38 {
  39         int ok=0;
  40         int pmap_mode = 0;
  41         int idx = 0;
  42         struct tc_prio_qopt opt={3,{ 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 }};
  43         struct rtattr *nest;
  44         unsigned char mq = 0;
  45
  46         while (argc > 0) {
  47                 if (strcmp(*argv, "bands") == 0) {
  48                         if (pmap_mode)
  49                                 explain();
  50                         NEXT_ARG();
  51                         if (get_integer(&opt.bands, *argv, 10)) {
  52                                 fprintf(stderr, "Illegal \"bands\"\n");
  53                                 return -1;
  54                         }
  55                         ok++;
  56                 } else if (strcmp(*argv, "priomap") == 0) {
  57                         if (pmap_mode) {
  58                                 fprintf(stderr, "Error: duplicate priomap\n");
  59                                 return -1;
  60                         }
  61                         pmap_mode = 1;
  62                 } else if (strcmp(*argv, "multiqueue") == 0) {
  63                         mq = 1;
  64                 } else if (strcmp(*argv, "help") == 0) {
  65                         explain();
  66                         return -1;
  67                 } else {
  68                         unsigned band;
  69                         if (!pmap_mode) {
  70                                 fprintf(stderr, "What is \"%s\"?\n", *argv);
  71                                 explain();
  72                                 return -1;
  73                         }
  74                         if (get_unsigned(&band, *argv, 10)) {
  75                                 fprintf(stderr, "Illegal \"priomap\" element\n");
  76                                 return -1;
  77                         }
  78                         if (band > opt.bands) {
  79                                 fprintf(stderr, "\"priomap\" element is out of bands\n");
  80                                 return -1;
  81                         }
  82                         if (idx > TC_PRIO_MAX) {
  83                                 fprintf(stderr, "\"priomap\" index > TC_PRIO_MAX=%u\n", TC_PRIO_MAX);
  84                                 return -1;
  85                         }
  86                         opt.priomap[idx++] = band;
  87                 }
  88                 argc--; argv++;
  89         }
  90
  91 /*
  92         if (pmap_mode) {
  93                 for (; idx < TC_PRIO_MAX; idx++)
  94                         opt.priomap[idx] = opt.priomap[TC_PRIO_BESTEFFORT];
  95         }
  96 */
  97         nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
  98         if (mq)
  99                 addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
 100         addattr_nest_compat_end(n, nest);
 101         return 0;
 102 }
 103
 104 int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 105 {
 106         int i;
 107         struct tc_prio_qopt *qopt;
 108         struct rtattr *tb[TCA_PRIO_MAX+1];
 109
 110         if (opt == NULL)
 111                 return 0;
 112
 113         if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
 114                                         sizeof(*qopt)))
 115                 return -1;
 116
 117         fprintf(f, "bands %u priomap ", qopt->bands);
 118         for (i=0; i<=TC_PRIO_MAX; i++)
 119                 fprintf(f, " %d", qopt->priomap[i]);
 120
 121         if (tb[TCA_PRIO_MQ])
 122                 fprintf(f, " multiqueue: %s ",
 123                     *(unsigned char *)RTA_DATA(tb[TCA_PRIO_MQ]) ? "on" : "off");
 124
 125         return 0;
 126 }
 127
 128 struct qdisc_util prio_qdisc_util = {
 129         .id             = "prio",
 130         .parse_qopt     = prio_parse_opt,
 131         .print_qopt     = prio_print_opt,
 132 };
 133