libnl  3.5.0
nl-qdisc-list.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/nl-qdisc-list.c List Queueing Disciplines
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) 2003-2010 Thomas Graf <tgraf@suug.ch>
11  */
12 
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/tc.h>
15 #include <netlink/cli/qdisc.h>
16 #include <netlink/cli/class.h>
17 #include <netlink/cli/cls.h>
18 #include <netlink/cli/link.h>
19 
20 #include <linux/pkt_sched.h>
21 #include <linux/netlink.h>
22 
23 #define NUM_INDENT 4
24 
25 static struct nl_sock *sock;
26 static int recursive = 0;
27 static struct nl_dump_params params = {
29 };
30 
31 static void print_usage(void)
32 {
33  printf(
34  "Usage: nl-qdisc-list [OPTION]... [QDISC]\n"
35  "\n"
36  "OPTIONS\n"
37  " --details Show details\n"
38  " --stats Show statistics\n"
39  " -r, --recursive Show recursive tree\n"
40  " -h, --help Show this help\n"
41  " -v, --version Show versioning information\n"
42  "\n"
43  " -d, --dev=DEV Device the qdisc is attached to. (default: all)\n"
44  " -p, --parent=ID Identifier of parent qdisc.\n"
45  " -i, --id=ID Identifier.\n"
46  " -k, --kind=NAME Kind of qdisc (e.g. pfifo_fast)\n"
47  "\n"
48  "EXAMPLE\n"
49  " # Display statistics of all qdiscs attached to eth0\n"
50  " $ nl-qdisc-list --details --dev=eth0\n"
51  "\n"
52  );
53  exit(0);
54 }
55 
56 static void list_classes(int ifindex, uint32_t parent);
57 static void list_qdiscs(int ifindex, uint32_t parent);
58 
59 static void list_class(struct nl_object *obj, void *arg)
60 {
61  struct rtnl_tc *tc = nl_object_priv(obj);
62  nl_object_dump(obj, &params);
63 
64  list_classes(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
65  list_qdiscs(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
66 }
67 
68 static void list_classes(int ifindex, uint32_t parent)
69 {
70  struct nl_cache *class_cache;
71  struct rtnl_class *filter = nl_cli_class_alloc();
72 
73  class_cache = nl_cli_class_alloc_cache(sock, ifindex);
74 
75  rtnl_tc_set_parent((struct rtnl_tc *) filter, parent);
76  params.dp_prefix += NUM_INDENT;
77  nl_cache_foreach_filter(class_cache, OBJ_CAST(filter), list_class, NULL);
78  params.dp_prefix -= NUM_INDENT;
79 
80  rtnl_class_put(filter);
81  nl_cache_free(class_cache);
82 }
83 
84 static void list_cls(int ifindex, uint32_t parent)
85 {
86  struct nl_cache *cls_cache;
87 
88  cls_cache = nl_cli_cls_alloc_cache(sock, ifindex, parent);
89 
90  params.dp_prefix += NUM_INDENT;
91  nl_cache_dump(cls_cache, &params);
92  params.dp_prefix -= NUM_INDENT;
93 
94  nl_cache_free(cls_cache);
95 }
96 
97 static void list_qdisc(struct nl_object *obj, void *arg)
98 {
99  struct rtnl_qdisc *qdisc = nl_object_priv(obj);
100  struct rtnl_tc *tc = (struct rtnl_tc *) qdisc;
101 
102  nl_object_dump(obj, &params);
103 
104  list_cls(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
105 
106  if (rtnl_tc_get_parent(tc) == TC_H_ROOT) {
107  list_cls(rtnl_tc_get_ifindex(tc), TC_H_ROOT);
108  list_classes(rtnl_tc_get_ifindex(tc), TC_H_ROOT);
109  }
110 
111  list_classes(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
112 }
113 
114 static void list_qdiscs(int ifindex, uint32_t parent)
115 {
116  struct nl_cache *qdisc_cache;
117  struct rtnl_qdisc *filter = nl_cli_qdisc_alloc();
118 
119  qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
120 
121  rtnl_tc_set_ifindex((struct rtnl_tc *) filter, ifindex);
122  rtnl_tc_set_parent((struct rtnl_tc *) filter, parent);
123  params.dp_prefix += NUM_INDENT;
124  nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(filter), list_qdisc, NULL);
125  params.dp_prefix -= NUM_INDENT;
126 
127  rtnl_qdisc_put(filter);
128  nl_cache_free(qdisc_cache);
129 }
130 
131 int main(int argc, char *argv[])
132 {
133  struct rtnl_qdisc *qdisc;
134  struct rtnl_tc *tc;
135  struct nl_cache *link_cache, *qdisc_cache;
136 
137  params.dp_fd = stdout;
138  sock = nl_cli_alloc_socket();
139  nl_cli_connect(sock, NETLINK_ROUTE);
140  link_cache = nl_cli_link_alloc_cache(sock);
141  qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
142  qdisc = nl_cli_qdisc_alloc();
143  tc = (struct rtnl_tc *) qdisc;
144 
145  for (;;) {
146  int c, optidx = 0;
147  enum {
148  ARG_DETAILS = 257,
149  ARG_STATS = 258,
150  };
151  static struct option long_opts[] = {
152  { "details", 0, 0, ARG_DETAILS },
153  { "stats", 0, 0, ARG_STATS },
154  { "recursive", 0, 0, 'r' },
155  { "help", 0, 0, 'h' },
156  { "version", 0, 0, 'v' },
157  { "dev", 1, 0, 'd' },
158  { "parent", 1, 0, 'p' },
159  { "id", 1, 0, 'i' },
160  { "kind", 1, 0, 'k' },
161  { 0, 0, 0, 0 }
162  };
163 
164  c = getopt_long(argc, argv, "rhvd:p:i:k:", long_opts, &optidx);
165  if (c == -1)
166  break;
167 
168  switch (c) {
169  case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
170  case ARG_STATS: params.dp_type = NL_DUMP_STATS; break;
171  case 'r': recursive = 1; break;
172  case 'h': print_usage(); break;
173  case 'v': nl_cli_print_version(); break;
174  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
175  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
176  case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
177  case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
178  }
179  }
180 
181  if (recursive)
182  nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(qdisc), list_qdisc, NULL);
183  else
184  nl_cache_dump_filter(qdisc_cache, &params, OBJ_CAST(qdisc));
185 
186  return 0;
187 }
Dump object briefly on one line.
Definition: types.h:22
FILE * dp_fd
File descriptor the dumping output should go to.
Definition: types.h:83
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
void nl_cache_dump_filter(struct nl_cache *cache, struct nl_dump_params *params, struct nl_object *filter)
Dump all elements of a cache (filtered).
Definition: cache.c:1217
void rtnl_tc_set_parent(struct rtnl_tc *tc, uint32_t parent)
Set the parent identifier of a traffic control object.
Definition: tc.c:508
void nl_cache_foreach_filter(struct nl_cache *cache, struct nl_object *filter, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback on each element of the cache (filtered).
Definition: cache.c:1283
Dump all attributes but no statistics.
Definition: types.h:23
void nl_cache_free(struct nl_cache *cache)
Free a cache.
Definition: cache.c:409
uint32_t rtnl_tc_get_handle(struct rtnl_tc *tc)
Return identifier of a traffic control object.
Definition: tc.c:497
void rtnl_tc_set_ifindex(struct rtnl_tc *tc, int ifindex)
Set interface index of traffic control object.
Definition: tc.c:279
void nl_object_dump(struct nl_object *obj, struct nl_dump_params *params)
Dump this object according to the specified parameters.
Definition: object.c:289
uint32_t rtnl_tc_get_parent(struct rtnl_tc *tc)
Return parent identifier of a traffic control object.
Definition: tc.c:518
void nl_cache_dump(struct nl_cache *cache, struct nl_dump_params *params)
Dump all elements of a cache.
Definition: cache.c:1203
int dp_prefix
Specifies the number of whitespaces to be put in front of every new line (indentation).
Definition: types.h:44
Dumping parameters.
Definition: types.h:33
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:294
Dump all attributes including statistics.
Definition: types.h:24