1 2 /* 3 * src/lib/cli/qdisc/plug.c plug module for CLI lib 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation version 2.1 8 * of the License. 9 * 10 * Copyright (c) 2012 Shriram Rajagopalan <rshriram (at) cs.ubc.ca> 11 */ 12 13 #include <netlink/cli/utils.h> 14 #include <netlink/cli/tc.h> 15 #include <netlink/route/qdisc/plug.h> 16 17 static void print_usage(void) 18 { 19 printf( 20 "Usage: nl-qdisc-add [...] plug [OPTIONS]...\n" 21 "\n" 22 "OPTIONS\n" 23 " --help Show this help text.\n" 24 " --limit Maximum queue length in bytes.\n" 25 " --buffer create a new buffer(plug) and queue incoming traffic into it.\n" 26 " --release-one release traffic from previous buffer.\n" 27 " --release-indefinite stop buffering and release all (buffered and new) packets.\n" 28 "\n" 29 "EXAMPLE" 30 " # Attach plug qdisc with 32KB queue size to ifb0\n" 31 " nl-qdisc-add --dev=ifb0 --parent=root plug --limit=32768\n" 32 " # Plug network traffic arriving at ifb0\n" 33 " nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n" 34 " # Unplug traffic arriving at ifb0 indefinitely\n" 35 " nl-qdisc-add --dev=ifb0 --parent=root --update plug --release-indefinite\n\n" 36 " # If operating in output buffering mode:\n" 37 " # at time t=t0, create a new output buffer b0 to hold network output\n" 38 " nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n\n" 39 " # at time t=t1, take a checkpoint c0, create a new output buffer b1\n" 40 " nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n" 41 " # at time t=t1+r, after c0 is committed, release b0\n" 42 " nl-qdisc-add --dev=ifb0 --parent=root --update plug --release-one\n\n" 43 " # at time t=t2, take a checkpoint c1, create a new output buffer b2\n" 44 " nl-qdisc-add --dev=ifb0 --parent=root --update plug --buffer\n" 45 " # at time t=t2+r, after c1 is committed, release b1\n" 46 " nl-qdisc-add --dev=ifb0 --parent=root --update plug --release-one\n"); 47 } 48 49 static void plug_parse_argv(struct rtnl_tc *tc, int argc, char **argv) 50 { 51 struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) tc; 52 53 for (;;) { 54 int c, optidx = 0; 55 enum { 56 ARG_LIMIT = 257, 57 ARG_BUFFER = 258, 58 ARG_RELEASE_ONE = 259, 59 ARG_RELEASE_INDEFINITE = 260, 60 }; 61 static struct option long_opts[] = { 62 { "help", 0, 0, 'h' }, 63 { "limit", 1, 0, ARG_LIMIT }, 64 { "buffer", 0, 0, ARG_BUFFER }, 65 { "release-one", 0, 0, ARG_RELEASE_ONE }, 66 { "release-indefinite", 0, 0, ARG_RELEASE_INDEFINITE }, 67 { 0, 0, 0, 0 } 68 }; 69 70 c = getopt_long(argc, argv, "h", long_opts, &optidx); 71 if (c == -1) 72 break; 73 74 switch (c) { 75 case 'h': 76 print_usage(); 77 return; 78 79 case ARG_LIMIT: 80 rtnl_qdisc_plug_set_limit(qdisc, nl_cli_parse_u32(optarg)); 81 break; 82 83 case ARG_BUFFER: 84 rtnl_qdisc_plug_buffer(qdisc); 85 break; 86 87 case ARG_RELEASE_ONE: 88 rtnl_qdisc_plug_release_one(qdisc); 89 break; 90 91 case ARG_RELEASE_INDEFINITE: 92 rtnl_qdisc_plug_release_indefinite(qdisc); 93 break; 94 } 95 } 96 } 97 98 static struct nl_cli_tc_module plug_module = 99 { 100 .tm_name = "plug", 101 .tm_type = RTNL_TC_TYPE_QDISC, 102 .tm_parse_argv = plug_parse_argv, 103 }; 104 105 static void __init plug_init(void) 106 { 107 nl_cli_tc_register(&plug_module); 108 } 109 110 static void __exit plug_exit(void) 111 { 112 nl_cli_tc_unregister(&plug_module); 113 } 114
