/* * 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); }