libnl  3.7.0
nl-qdisc-list.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * Copyright (c) 2003-2010 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/class.h>
10 #include <netlink/cli/cls.h>
11 #include <netlink/cli/link.h>
12 
13 #include <linux/pkt_sched.h>
14 #include <linux/netlink.h>
15 
16 #define NUM_INDENT 4
17 
18 static struct nl_sock *sock;
19 static int recursive = 0;
20 static struct nl_dump_params params = {
22 };
23 
24 static void print_usage(void)
25 {
26  printf(
27  "Usage: nl-qdisc-list [OPTION]... [QDISC]\n"
28  "\n"
29  "OPTIONS\n"
30  " --details Show details\n"
31  " --stats Show statistics\n"
32  " -r, --recursive Show recursive tree\n"
33  " -h, --help Show this help\n"
34  " -v, --version Show versioning information\n"
35  "\n"
36  " -d, --dev=DEV Device the qdisc is attached to. (default: all)\n"
37  " -p, --parent=ID Identifier of parent qdisc.\n"
38  " -i, --id=ID Identifier.\n"
39  " -k, --kind=NAME Kind of qdisc (e.g. pfifo_fast)\n"
40  "\n"
41  "EXAMPLE\n"
42  " # Display statistics of all qdiscs attached to eth0\n"
43  " $ nl-qdisc-list --details --dev=eth0\n"
44  "\n"
45  );
46  exit(0);
47 }
48 
49 static void list_classes(int ifindex, uint32_t parent);
50 static void list_qdiscs(int ifindex, uint32_t parent);
51 
52 static void list_class(struct nl_object *obj, void *arg)
53 {
54  struct rtnl_tc *tc = nl_object_priv(obj);
55  nl_object_dump(obj, &params);
56 
57  list_classes(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
58  list_qdiscs(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
59 }
60 
61 static void list_classes(int ifindex, uint32_t parent)
62 {
63  struct nl_cache *class_cache;
64  struct rtnl_class *filter = nl_cli_class_alloc();
65 
66  class_cache = nl_cli_class_alloc_cache(sock, ifindex);
67 
68  rtnl_tc_set_parent((struct rtnl_tc *) filter, parent);
69  params.dp_prefix += NUM_INDENT;
70  nl_cache_foreach_filter(class_cache, OBJ_CAST(filter), list_class, NULL);
71  params.dp_prefix -= NUM_INDENT;
72 
73  rtnl_class_put(filter);
74  nl_cache_free(class_cache);
75 }
76 
77 static void list_cls(int ifindex, uint32_t parent)
78 {
79  struct nl_cache *cls_cache;
80 
81  cls_cache = nl_cli_cls_alloc_cache(sock, ifindex, parent);
82 
83  params.dp_prefix += NUM_INDENT;
84  nl_cache_dump(cls_cache, &params);
85  params.dp_prefix -= NUM_INDENT;
86 
87  nl_cache_free(cls_cache);
88 }
89 
90 static void list_qdisc(struct nl_object *obj, void *arg)
91 {
92  struct rtnl_qdisc *qdisc = nl_object_priv(obj);
93  struct rtnl_tc *tc = (struct rtnl_tc *) qdisc;
94 
95  nl_object_dump(obj, &params);
96 
97  list_cls(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
98 
99  if (rtnl_tc_get_parent(tc) == TC_H_ROOT) {
100  list_cls(rtnl_tc_get_ifindex(tc), TC_H_ROOT);
101  list_classes(rtnl_tc_get_ifindex(tc), TC_H_ROOT);
102  }
103 
104  list_classes(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc));
105 }
106 
107 static void list_qdiscs(int ifindex, uint32_t parent)
108 {
109  struct nl_cache *qdisc_cache;
110  struct rtnl_qdisc *filter = nl_cli_qdisc_alloc();
111 
112  qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
113 
114  rtnl_tc_set_ifindex((struct rtnl_tc *) filter, ifindex);
115  rtnl_tc_set_parent((struct rtnl_tc *) filter, parent);
116  params.dp_prefix += NUM_INDENT;
117  nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(filter), list_qdisc, NULL);
118  params.dp_prefix -= NUM_INDENT;
119 
120  rtnl_qdisc_put(filter);
121  nl_cache_free(qdisc_cache);
122 }
123 
124 int main(int argc, char *argv[])
125 {
126  struct rtnl_qdisc *qdisc;
127  struct rtnl_tc *tc;
128  struct nl_cache *link_cache, *qdisc_cache;
129 
130  params.dp_fd = stdout;
131  sock = nl_cli_alloc_socket();
132  nl_cli_connect(sock, NETLINK_ROUTE);
133  link_cache = nl_cli_link_alloc_cache(sock);
134  qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
135  qdisc = nl_cli_qdisc_alloc();
136  tc = (struct rtnl_tc *) qdisc;
137 
138  for (;;) {
139  int c, optidx = 0;
140  enum {
141  ARG_DETAILS = 257,
142  ARG_STATS = 258,
143  };
144  static struct option long_opts[] = {
145  { "details", 0, 0, ARG_DETAILS },
146  { "stats", 0, 0, ARG_STATS },
147  { "recursive", 0, 0, 'r' },
148  { "help", 0, 0, 'h' },
149  { "version", 0, 0, 'v' },
150  { "dev", 1, 0, 'd' },
151  { "parent", 1, 0, 'p' },
152  { "id", 1, 0, 'i' },
153  { "kind", 1, 0, 'k' },
154  { 0, 0, 0, 0 }
155  };
156 
157  c = getopt_long(argc, argv, "rhvd:p:i:k:", long_opts, &optidx);
158  if (c == -1)
159  break;
160 
161  switch (c) {
162  case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
163  case ARG_STATS: params.dp_type = NL_DUMP_STATS; break;
164  case 'r': recursive = 1; break;
165  case 'h': print_usage(); break;
166  case 'v': nl_cli_print_version(); break;
167  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
168  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
169  case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
170  case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
171  }
172  }
173 
174  if (recursive)
175  nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(qdisc), list_qdisc, NULL);
176  else
177  nl_cache_dump_filter(qdisc_cache, &params, OBJ_CAST(qdisc));
178 
179  return 0;
180 }
void nl_cache_free(struct nl_cache *cache)
Free a cache.
Definition: cache.c:403
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:1211
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:1294
void nl_cache_dump(struct nl_cache *cache, struct nl_dump_params *params)
Dump all elements of a cache.
Definition: cache.c:1197
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
uint32_t rtnl_tc_get_parent(struct rtnl_tc *tc)
Return parent identifier of a traffic control object.
Definition: tc.c:511
void rtnl_tc_set_ifindex(struct rtnl_tc *tc, int ifindex)
Set interface index of traffic control object.
Definition: tc.c:272
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:287
uint32_t rtnl_tc_get_handle(struct rtnl_tc *tc)
Return identifier of a traffic control object.
Definition: tc.c:490
void rtnl_tc_set_parent(struct rtnl_tc *tc, uint32_t parent)
Set the parent identifier of a traffic control object.
Definition: tc.c:501
@ NL_DUMP_STATS
Dump all attributes including statistics.
Definition: types.h:18
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:16
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
Dumping parameters.
Definition: types.h:28
int dp_prefix
Specifies the number of whitespaces to be put in front of every new line (indentation).
Definition: types.h:38
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:32
FILE * dp_fd
File descriptor the dumping output should go to.
Definition: types.h:77