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