| |
| /* |
| * 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); |
| } |