bfifo.c

/*
 * src/lib/bfifo.c      bfifo module for CLI lib
 *
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation version 2.1
 *      of the License.
 *
 * Copyright (c) 2010-2011 Thomas Graf <tgraf@suug.ch>
 */

#include <netlink/cli/utils.h>
#include <netlink/cli/tc.h>
#include <netlink/route/qdisc/fifo.h>

static void print_usage(void)
{
        printf(
"Usage: nl-qdisc-add [...] bfifo [OPTIONS]...\n"
"\n"
"OPTIONS\n"
"     --help                Show this help text.\n"
"     --limit=LIMIT         Maximum queue length in number of bytes.\n"
"\n"
"EXAMPLE"
"    # Attach bfifo with a 4KB bytes limit to eth1\n"
"    nl-qdisc-add --dev=eth1 --parent=root bfifo --limit=4096\n");
}

static void bfifo_parse_argv(struct rtnl_tc *tc, int argc, char **argv)
{
        struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) tc;
        int limit;

        for (;;) {
                int c, optidx = 0;
                enum {
                        ARG_LIMIT = 257,
                };
                static struct option long_opts[] = {
                        { "help", 0, 0, 'h' },
                        { "limit", 1, 0, ARG_LIMIT },
                        { 0, 0, 0, 0 }
                };
        
                c = getopt_long(argc, argv, "h", long_opts, &optidx);
                if (c == -1)
                        break;

                switch (c) {
                case 'h':
                        print_usage();
                        return;

                case ARG_LIMIT:
                        limit = nl_size2int(optarg);
                        if (limit < 0) {
                                nl_cli_fatal(limit, "Unable to parse bfifo limit "
                                        "\"%s\": Invalid format.", optarg);
                        }

                        rtnl_qdisc_fifo_set_limit(qdisc, limit);
                        break;
                }
        }
}

static struct nl_cli_tc_module bfifo_module =
{
        .tm_name                = "bfifo",
        .tm_type                = RTNL_TC_TYPE_QDISC,
        .tm_parse_argv          = bfifo_parse_argv,
};

static void __init bfifo_init(void)
{
        nl_cli_tc_register(&bfifo_module);
}

static void __exit bfifo_exit(void)
{
        nl_cli_tc_unregister(&bfifo_module);
}