LXR iproute2/tc/f

   1/*
   2 * f_cgroup.c           Control Group Classifier
   3 *
   4 *              This program is free software; you can distribute 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:     Thomas Graf <tgraf@infradead.org>
  10 *
  11 */
  12
  13#include <stdio.h>
  14#include <stdlib.h>
  15#include "utils.h"
  16#include "tc_util.h"
  17#include "m_ematch.h"
  18
  19static void explain(void)
  20{
  21        fprintf(stderr, "Usage: ... cgroup [ match EMATCH_TREE ]\n");
  22        fprintf(stderr, "                  [ action ACTION_SPEC ]\n");
  23}
  24
  25static int cgroup_parse_opt(struct filter_util *qu, char *handle,
  26                           int argc, char **argv, struct nlmsghdr *n)
  27{
  28        struct tcmsg *t = NLMSG_DATA(n);
  29        struct rtattr *tail;
  30        long h = 0;
  31
  32        if (handle) {
  33                h = strtol(handle, NULL, 0);
  34                if (h == LONG_MIN || h == LONG_MAX) {
  35                        fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n",
  36                            handle);
  37                        return -1;
  38                }
  39        }
  40
  41        t->tcm_handle = h;
  42
  43        tail = (struct rtattr *)(((void *)n)+NLMSG_ALIGN(n->nlmsg_len));
  44        addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0);
  45
  46        while (argc > 0) {
  47                if (matches(*argv, "match") == 0) {
  48                        NEXT_ARG();
  49                        if (parse_ematch(&argc, &argv, TCA_CGROUP_EMATCHES, n)) {
  50                                fprintf(stderr, "Illegal \"ematch\"\n");
  51                                return -1;
  52                        }
  53                        continue;
  54                } else if (matches(*argv, "action") == 0) {
  55                        NEXT_ARG();
  56                        if (parse_action(&argc, &argv, TCA_CGROUP_ACT, n)) {
  57                                fprintf(stderr, "Illegal \"action\"\n");
  58                                return -1;
  59                        }
  60                        continue;
  61
  62                } else if (matches(*argv, "police") == 0) {
  63                        NEXT_ARG();
  64                        if (parse_police(&argc, &argv, TCA_CGROUP_POLICE, n)) {
  65                                fprintf(stderr, "Illegal \"police\"\n");
  66                                return -1;
  67                        }
  68                        continue;
  69                } else if (strcmp(*argv, "help") == 0) {
  70                        explain();
  71                        return -1;
  72                } else {
  73                        fprintf(stderr, "What is \"%s\"?\n", *argv);
  74                        explain();
  75                        return -1;
  76                }
  77        }
  78
  79        tail->rta_len = (((void *)n)+n->nlmsg_len) - (void *)tail;
  80        return 0;
  81}
  82
  83static int cgroup_print_opt(struct filter_util *qu, FILE *f,
  84                           struct rtattr *opt, __u32 handle)
  85{
  86        struct rtattr *tb[TCA_CGROUP_MAX+1];
  87
  88        if (opt == NULL)
  89                return 0;
  90
  91        parse_rtattr_nested(tb, TCA_CGROUP_MAX, opt);
  92
  93        if (handle)
  94                fprintf(f, "handle 0x%x ", handle);
  95
  96        if (tb[TCA_CGROUP_EMATCHES])
  97                print_ematch(f, tb[TCA_CGROUP_EMATCHES]);
  98
  99        if (tb[TCA_CGROUP_POLICE]) {
 100                fprintf(f, "\n");
 101                tc_print_police(f, tb[TCA_CGROUP_POLICE]);
 102        }
 103
 104        if (tb[TCA_CGROUP_ACT])
 105                tc_print_action(f, tb[TCA_CGROUP_ACT], 0);
 106
 107        return 0;
 108}
 109
 110struct filter_util cgroup_filter_util = {
 111        .id = "cgroup",
 112        .parse_fopt = cgroup_parse_opt,
 113        .print_fopt = cgroup_print_opt,
 114};
 115