libnl  3.6.0
nl-qdisc-add.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * Copyright (c) 2010 Thomas Graf <tgraf@suug.ch>
4  */
5 
6 #include <netlink/cli/utils.h>
7 #include <netlink/cli/tc.h>
8 #include <netlink/cli/qdisc.h>
9 #include <netlink/cli/link.h>
10 
11 #include <netlink-private/route/tc-api.h>
12 
13 #include <linux/netlink.h>
14 
15 static int quiet = 0;
16 
17 static void print_usage(void)
18 {
19  printf(
20 "Usage: nl-qdisc-add [OPTIONS]... QDISC [CONFIGURATION]...\n"
21 "\n"
22 "OPTIONS\n"
23 " -q, --quiet Do not print informal notifications.\n"
24 " -h, --help Show this help text.\n"
25 " -v, --version Show versioning information.\n"
26 " --update Update qdisc if it exists.\n"
27 " --replace Replace or update qdisc if it exists.\n"
28 " --update-only Only update qdisc, never create it.\n"
29 " --replace-only Only replace or update qdisc, never create it.\n"
30 " -d, --dev=DEV Network device the qdisc should be attached to.\n"
31 " -i, --id=ID ID of new qdisc (default: auto-generated)r\n"
32 " -p, --parent=ID ID of parent { root | ingress | QDISC-ID }\n"
33 "\n"
34 "CONFIGURATION\n"
35 " -h, --help Show help text of qdisc specific options.\n"
36 "\n"
37 "EXAMPLE\n"
38 " $ nl-qdisc-add --dev=eth1 --parent=root htb --rate=100mbit\n"
39 "\n"
40  );
41  exit(0);
42 }
43 
44 int main(int argc, char *argv[])
45 {
46  struct nl_sock *sock;
47  struct rtnl_qdisc *qdisc;
48  struct rtnl_tc *tc;
49  struct nl_cache *link_cache;
50  struct nl_dump_params dp = {
52  .dp_fd = stdout,
53  };
54  struct nl_cli_tc_module *tm;
55  struct rtnl_tc_ops *ops;
56  int err, flags = NLM_F_CREATE | NLM_F_EXCL;
57  char *kind, *id = NULL;
58 
59  sock = nl_cli_alloc_socket();
60  nl_cli_connect(sock, NETLINK_ROUTE);
61 
62  link_cache = nl_cli_link_alloc_cache(sock);
63 
64  qdisc = nl_cli_qdisc_alloc();
65  tc = (struct rtnl_tc *) qdisc;
66 
67  for (;;) {
68  int c, optidx = 0;
69  enum {
70  ARG_REPLACE = 257,
71  ARG_UPDATE = 258,
72  ARG_REPLACE_ONLY,
73  ARG_UPDATE_ONLY,
74  };
75  static struct option long_opts[] = {
76  { "quiet", 0, 0, 'q' },
77  { "help", 0, 0, 'h' },
78  { "version", 0, 0, 'v' },
79  { "dev", 1, 0, 'd' },
80  { "parent", 1, 0, 'p' },
81  { "id", 1, 0, 'i' },
82  { "replace", 0, 0, ARG_REPLACE },
83  { "update", 0, 0, ARG_UPDATE },
84  { "replace-only", 0, 0, ARG_REPLACE_ONLY },
85  { "update-only", 0, 0, ARG_UPDATE_ONLY },
86  { 0, 0, 0, 0 }
87  };
88 
89  c = getopt_long(argc, argv, "+qhvd:p:i:",
90  long_opts, &optidx);
91  if (c == -1)
92  break;
93 
94  switch (c) {
95  case 'q': quiet = 1; break;
96  case 'h': print_usage(); break;
97  case 'v': nl_cli_print_version(); break;
98  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
99  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
100  case 'i': id = strdup(optarg); break;
101  case ARG_UPDATE: flags = NLM_F_CREATE; break;
102  case ARG_REPLACE: flags = NLM_F_CREATE | NLM_F_REPLACE; break;
103  case ARG_UPDATE_ONLY: flags = 0; break;
104  case ARG_REPLACE_ONLY: flags = NLM_F_REPLACE; break;
105  }
106  }
107 
108  if (optind >= argc)
109  print_usage();
110 
111  if (!rtnl_tc_get_ifindex(tc))
112  nl_cli_fatal(EINVAL, "You must specify a network device (--dev=XXX)");
113 
114  if (!rtnl_tc_get_parent(tc))
115  nl_cli_fatal(EINVAL, "You must specify a parent");
116 
117  if (id) {
118  nl_cli_tc_parse_handle(tc, id, 1);
119  free(id);
120  }
121 
122  kind = argv[optind++];
123  rtnl_tc_set_kind(tc, kind);
124 
125  if (!(ops = rtnl_tc_get_ops(tc)))
126  nl_cli_fatal(ENOENT, "Unknown qdisc \"%s\"", kind);
127 
128  if (!(tm = nl_cli_tc_lookup(ops)))
129  nl_cli_fatal(ENOTSUP, "Qdisc type \"%s\" not supported.", kind);
130 
131  tm->tm_parse_argv(tc, argc, argv);
132 
133  if (!quiet) {
134  printf("Adding ");
135  nl_object_dump(OBJ_CAST(qdisc), &dp);
136  }
137 
138  if ((err = rtnl_qdisc_add(sock, qdisc, flags)) < 0)
139  nl_cli_fatal(EINVAL, "Unable to add qdisc: %s", nl_geterror(err));
140 
141  return 0;
142 }
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:71
void nl_object_dump(struct nl_object *obj, struct nl_dump_params *params)
Dump this object according to the specified parameters.
Definition: object.c:287
int rtnl_qdisc_add(struct nl_sock *sk, struct rtnl_qdisc *qdisc, int flags)
Add qdisc.
Definition: qdisc.c:156
uint32_t rtnl_tc_get_parent(struct rtnl_tc *tc)
Return parent identifier of a traffic control object.
Definition: tc.c:511
int rtnl_tc_set_kind(struct rtnl_tc *tc, const char *kind)
Define the type of traffic control object.
Definition: tc.c:523
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:287
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
Dumping parameters.
Definition: types.h:28
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:32