src/nl-qdisc-delete.c

   1 /*
   2  * src/nl-qdisc-delete.c     Delete Queuing Disciplines
   3  *
   4  *      This library is free software; you can redistribute it and/or
   5  *      modify it under the terms of the GNU Lesser General Public
   6  *      License as published by the Free Software Foundation version 2.1
   7  *      of the License.
   8  *
   9  * Copyright (c) 2003-2010 Thomas Graf <tgraf@suug.ch>
  10  */
  11
  12 #include <netlink/cli/utils.h>
  13 #include <netlink/cli/tc.h>
  14 #include <netlink/cli/qdisc.h>
  15 #include <netlink/cli/link.h>
  16
  17 static int quiet = 0, default_yes = 0, deleted = 0, interactive = 0;
  18 static struct nl_sock *sock;
  19
  20 static void print_usage(void)
  21 {
  22         printf(
  23         "Usage: nl-qdisc-delete [OPTION]... [QDISC]\n"
  24         "\n"
  25         "OPTIONS\n"
  26         "     --interactive     Run interactively.\n"
  27         "     --yes             Set default answer to yes.\n"
  28         " -q, --quiet           Do not print informal notifications.\n"
  29         " -h, --help            Show this help text and exit.\n"
  30         " -v, --version         Show versioning information and exit.\n"
  31         "\n"
  32         " -d, --dev=DEV         Device the qdisc is attached to.\n"
  33         " -p, --parent=ID       Identifier of parent qdisc/class.\n"
  34         " -i, --id=ID           Identifier\n"
  35         " -k, --kind=NAME       Kind of qdisc (e.g. pfifo_fast)\n"
  36         );
  37
  38         exit(0);
  39 }
  40
  41 static void delete_cb(struct nl_object *obj, void *arg)
  42 {
  43         struct rtnl_qdisc *qdisc = nl_object_priv(obj);
  44         struct nl_dump_params params = {
  45                 .dp_type = NL_DUMP_LINE,
  46                 .dp_fd = stdout,
  47         };
  48         int err;
  49
  50         /* Ignore default qdiscs, unable to delete */
  51         if (rtnl_tc_get_handle((struct rtnl_tc *) qdisc) == 0)
  52                 return;
  53
  54         if (interactive && !nl_cli_confirm(obj, &params, default_yes))
  55                 return;
  56
  57         if ((err = rtnl_qdisc_delete(sock, qdisc)) < 0)
  58                 nl_cli_fatal(err, "Unable to delete qdisc: %s\n", nl_geterror(err));
  59
  60         if (!quiet) {
  61                 printf("Deleted ");
  62                 nl_object_dump(obj, &params);
  63         }
  64
  65         deleted++;
  66 }
  67
  68 int main(int argc, char *argv[])
  69 {
  70         struct rtnl_qdisc *qdisc;
  71         struct rtnl_tc *tc;
  72         struct nl_cache *link_cache, *qdisc_cache;
  73         int nfilter = 0;
  74
  75         sock = nl_cli_alloc_socket();
  76         nl_cli_connect(sock, NETLINK_ROUTE);
  77         link_cache = nl_cli_link_alloc_cache(sock);
  78         qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
  79         qdisc = nl_cli_qdisc_alloc();
  80         tc = (struct rtnl_tc *) qdisc;
  81
  82         for (;;) {
  83                 int c, optidx = 0;
  84                 enum {
  85                         ARG_YES = 257,
  86                         ARG_INTERACTIVE = 258,
  87                 };
  88                 static struct option long_opts[] = {
  89                         { "interactive", 0, 0, ARG_INTERACTIVE },
  90                         { "yes", 0, 0, ARG_YES },
  91                         { "quiet", 0, 0, 'q' },
  92                         { "help", 0, 0, 'h' },
  93                         { "version", 0, 0, 'v' },
  94                         { "dev", 1, 0, 'd' },
  95                         { "parent", 1, 0, 'p' },
  96                         { "id", 1, 0, 'i' },
  97                         { "kind", 1, 0, 'k' },
  98                         { 0, 0, 0, 0 }
  99                 };
 100
 101                 c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
 102                 if (c == -1)
 103                         break;
 104
 105                 switch (c) {
 106                 case '?': nl_cli_fatal(EINVAL, "Invalid options");
 107                 case ARG_INTERACTIVE: interactive = 1; break;
 108                 case ARG_YES: default_yes = 1; break;
 109                 case 'q': quiet = 1; break;
 110                 case 'h': print_usage(); break;
 111                 case 'v': nl_cli_print_version(); break;
 112                 case 'd':
 113                         nfilter++;
 114                         nl_cli_tc_parse_dev(tc, link_cache, optarg);
 115                         break;
 116                 case 'p':
 117                         nfilter++;
 118                         nl_cli_tc_parse_parent(tc, optarg);
 119                         break;
 120                 case 'i':
 121                         nfilter++;
 122                         nl_cli_tc_parse_handle(tc, optarg, 0);
 123                         break;
 124                 case 'k':
 125                         nfilter++;
 126                         nl_cli_tc_parse_kind(tc, optarg);
 127                         break;
 128                 }
 129         }
 130
 131         if (nfilter == 0 && !interactive && !default_yes) {
 132                 nl_cli_fatal(EINVAL,
 133                         "You are attempting to delete all qdiscs on all devices.\n"
 134                         "If you want to proceed, run nl-qdisc-delete --yes.\n"
 135                         "Aborting...");
 136         }
 137
 138         nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(qdisc), delete_cb, NULL);
 139
 140         if (!quiet)
 141                 printf("Deleted %d qdiscs\n", deleted);
 142
 143         return 0;
 144 }