bfifo.c

00001 /*
00002  * src/lib/bfifo.c      bfifo module for CLI lib
00003  *
00004  *      This library is free software; you can redistribute it and/or
00005  *      modify it under the terms of the GNU Lesser General Public
00006  *      License as published by the Free Software Foundation version 2.1
00007  *      of the License.
00008  *
00009  * Copyright (c) 2010-2011 Thomas Graf <tgraf@suug.ch>
00010  */
00011 
00012 #include <netlink/cli/utils.h>
00013 #include <netlink/cli/tc.h>
00014 #include <netlink/route/qdisc/fifo.h>
00015 
00016 static void print_usage(void)
00017 {
00018         printf(
00019 "Usage: nl-qdisc-add [...] bfifo [OPTIONS]...\n"
00020 "\n"
00021 "OPTIONS\n"
00022 "     --help                Show this help text.\n"
00023 "     --limit=LIMIT         Maximum queue length in number of bytes.\n"
00024 "\n"
00025 "EXAMPLE"
00026 "    # Attach bfifo with a 4KB bytes limit to eth1\n"
00027 "    nl-qdisc-add --dev=eth1 --parent=root bfifo --limit=4096\n");
00028 }
00029 
00030 static void bfifo_parse_argv(struct rtnl_tc *tc, int argc, char **argv)
00031 {
00032         struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) tc;
00033         int limit;
00034 
00035         for (;;) {
00036                 int c, optidx = 0;
00037                 enum {
00038                         ARG_LIMIT = 257,
00039                 };
00040                 static struct option long_opts[] = {
00041                         { "help", 0, 0, 'h' },
00042                         { "limit", 1, 0, ARG_LIMIT },
00043                         { 0, 0, 0, 0 }
00044                 };
00045         
00046                 c = getopt_long(argc, argv, "h", long_opts, &optidx);
00047                 if (c == -1)
00048                         break;
00049 
00050                 switch (c) {
00051                 case 'h':
00052                         print_usage();
00053                         return;
00054 
00055                 case ARG_LIMIT:
00056                         limit = nl_size2int(optarg);
00057                         if (limit < 0) {
00058                                 nl_cli_fatal(limit, "Unable to parse bfifo limit "
00059                                         "\"%s\": Invalid format.", optarg);
00060                         }
00061 
00062                         rtnl_qdisc_fifo_set_limit(qdisc, limit);
00063                         break;
00064                 }
00065         }
00066 }
00067 
00068 static struct nl_cli_tc_module bfifo_module =
00069 {
00070         .tm_name                = "bfifo",
00071         .tm_type                = RTNL_TC_TYPE_QDISC,
00072         .tm_parse_argv          = bfifo_parse_argv,
00073 };
00074 
00075 static void __init bfifo_init(void)
00076 {
00077         nl_cli_tc_register(&bfifo_module);
00078 }
00079 
00080 static void __exit bfifo_exit(void)
00081 {
00082         nl_cli_tc_unregister(&bfifo_module);
00083 }