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/*
* src/lib/cli/qdisc/plug.c plug 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) 2012 Shriram Rajagopalan <rshriram@cs.ubc.ca>
*/
#include <netlink/cli/utils.h>
#include <netlink/cli/tc.h>
#include <netlink/route/qdisc/plug.h>
static void print_usage(void)
{
printf(
"Usage: nl-qdisc-add [...] plug [OPTIONS]...\n"
"\n"
"OPTIONS\n"
" --help Show this help text.\n"
" --limit Maximum queue length in bytes.\n"
" --buffer create a new buffer(plug) and queue incoming traffic into it.\n"
" --release-one release traffic from previous buffer.\n"
" --release-indefinite stop buffering and release all (buffered and new) packets.\n"
"\n"
"EXAMPLE"
" # Attach plug qdisc with 32KB queue size to ifb0\n"
" nl-qdisc-add --dev=ifb0 --parent=root plug --limit=32768\n"
" # Plug network traffic arriving at ifb0\n"
" nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n"
" # Unplug traffic arriving at ifb0 indefinitely\n"
" nl-qdisc-add --dev=ifb0 --parent=root --update plug --release-indefinite\n\n"
" # If operating in output buffering mode:\n"
" # at time t=t0, create a new output buffer b0 to hold network output\n"
" nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n\n"
" # at time t=t1, take a checkpoint c0, create a new output buffer b1\n"
" nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n"
" # at time t=t1+r, after c0 is committed, release b0\n"
" nl-qdisc-add --dev=ifb0 --parent=root --update plug --release-one\n\n"
" # at time t=t2, take a checkpoint c1, create a new output buffer b2\n"
" nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n"
" # at time t=t2+r, after c1 is committed, release b1\n"
" nl-qdisc-add --dev=ifb0 --parent=root --update plug --release-one\n");
}
static void plug_parse_argv(struct rtnl_tc *tc, int argc, char **argv)
{
struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) tc;
for (;;) {
int c, optidx = 0;
enum {
ARG_LIMIT = 257,
ARG_BUFFER = 258,
ARG_RELEASE_ONE = 259,
ARG_RELEASE_INDEFINITE = 260,
};
static struct option long_opts[] = {
{ "help", 0, 0, 'h' },
{ "limit", 1, 0, ARG_LIMIT },
{ "buffer", 0, 0, ARG_BUFFER },
{ "release-one", 0, 0, ARG_RELEASE_ONE },
{ "release-indefinite", 0, 0, ARG_RELEASE_INDEFINITE },
{ 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:
rtnl_qdisc_plug_set_limit(qdisc, nl_cli_parse_u32(optarg));
break;
case ARG_BUFFER:
rtnl_qdisc_plug_buffer(qdisc);
break;
case ARG_RELEASE_ONE:
rtnl_qdisc_plug_release_one(qdisc);
break;
case ARG_RELEASE_INDEFINITE:
rtnl_qdisc_plug_release_indefinite(qdisc);
break;
}
}
}
static struct nl_cli_tc_module plug_module =
{
.tm_name = "plug",
.tm_type = RTNL_TC_TYPE_QDISC,
.tm_parse_argv = plug_parse_argv,
};
static void __init plug_init(void)
{
nl_cli_tc_register(&plug_module);
}
static void __exit plug_exit(void)
{
nl_cli_tc_unregister(&plug_module);
}
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