libnl  3.5.0
nl-tctree-list.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/nl-tctree-list.c List Traffic Control Tree
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) 2003-2009 Thomas Graf <tgraf@suug.ch>
11  */
12 
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/link.h>
15 #include <netlink/cli/qdisc.h>
16 #include <netlink/cli/class.h>
17 
18 #include <linux/netlink.h>
19 #include <linux/pkt_sched.h>
20 
21 static struct nl_sock *sock;
22 static struct nl_cache *qdisc_cache, *class_cache;
23 static struct nl_dump_params params = {
25 };
26 
27 static int ifindex;
28 static void print_qdisc(struct nl_object *, void *);
29 static void print_tc_childs(struct rtnl_tc *, void *);
30 
31 static void print_usage(void)
32 {
33  printf(
34  "Usage: nl-tctree-list [OPTION]...\n"
35  "\n"
36  "Options\n"
37  " -f, --format=TYPE Output format { brief | details | stats }\n"
38  " -h, --help Show this help\n"
39  " -v, --version Show versioning information\n"
40  );
41  exit(0);
42 }
43 
44 static void print_class(struct nl_object *obj, void *arg)
45 {
46  struct rtnl_qdisc *leaf;
47  struct rtnl_class *class = (struct rtnl_class *) obj;
48  struct nl_cache *cls_cache;
49  uint32_t parent = rtnl_tc_get_handle((struct rtnl_tc *) class);
50 
51  params.dp_prefix = (int)(long) arg;
52  nl_object_dump(obj, &params);
53 
54  leaf = rtnl_class_leaf_qdisc(class, qdisc_cache);
55  if (leaf)
56  print_qdisc((struct nl_object *) leaf, (char *) arg + 2);
57 
58  print_tc_childs(TC_CAST(class), (char *) arg + 2);
59 
60  if (rtnl_cls_alloc_cache(sock, ifindex, parent, &cls_cache) < 0)
61  return;
62 
63  params.dp_prefix = (int)(long) arg + 2;
64  nl_cache_dump(cls_cache, &params);
65  nl_cache_free(cls_cache);
66 }
67 
68 static void print_tc_childs(struct rtnl_tc *tc, void *arg)
69 {
70  struct rtnl_class *filter;
71 
72  filter = nl_cli_class_alloc();
73 
76 
77  nl_cache_foreach_filter(class_cache, OBJ_CAST(filter), &print_class, arg);
78 
79  rtnl_class_put(filter);
80 }
81 
82 static void print_qdisc(struct nl_object *obj, void *arg)
83 {
84  struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) obj;
85  struct nl_cache *cls_cache;
86  uint32_t parent = rtnl_tc_get_handle((struct rtnl_tc *) qdisc);
87 
88  params.dp_prefix = (int)(long) arg;
89  nl_object_dump(obj, &params);
90 
91  print_tc_childs(TC_CAST(qdisc), (char *) arg + 2);
92 
93  if (rtnl_cls_alloc_cache(sock, ifindex, parent, &cls_cache) < 0)
94  return;
95 
96  params.dp_prefix = (int)(long) arg + 2;
97  nl_cache_dump(cls_cache, &params);
98  nl_cache_free(cls_cache);
99 }
100 
101 static void print_link(struct nl_object *obj, void *arg)
102 {
103  struct rtnl_link *link = (struct rtnl_link *) obj;
104  struct rtnl_qdisc *qdisc;
105 
106  ifindex = rtnl_link_get_ifindex(link);
107  params.dp_prefix = 0;
108  nl_object_dump(obj, &params);
109 
110  if (rtnl_class_alloc_cache(sock, ifindex, &class_cache) < 0)
111  return;
112 
113  qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, TC_H_ROOT);
114  if (qdisc) {
115  print_qdisc((struct nl_object *) qdisc, (void *) 2);
116  rtnl_qdisc_put(qdisc);
117  }
118 
119  qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, 0);
120  if (qdisc) {
121  print_qdisc((struct nl_object *) qdisc, (void *) 2);
122  rtnl_qdisc_put(qdisc);
123  }
124 
125  qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, TC_H_INGRESS);
126  if (qdisc) {
127  print_qdisc((struct nl_object *) qdisc, (void *) 2);
128  rtnl_qdisc_put(qdisc);
129  }
130 
131  nl_cache_free(class_cache);
132 }
133 
134 int main(int argc, char *argv[])
135 {
136  struct nl_cache *link_cache;
137 
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 
143  params.dp_fd = stdout;
144 
145  for (;;) {
146  int c, optidx = 0;
147  static struct option long_opts[] = {
148  { "format", 1, 0, 'f' },
149  { "help", 0, 0, 'h' },
150  { "version", 0, 0, 'v' },
151  { 0, 0, 0, 0 }
152  };
153 
154  c = getopt_long(argc, argv, "f:hv", long_opts, &optidx);
155  if (c == -1)
156  break;
157 
158  switch (c) {
159  case 'f': params.dp_type = nl_cli_parse_dumptype(optarg); break;
160  case 'h': print_usage(); break;
161  case 'v': nl_cli_print_version(); break;
162  }
163  }
164 
165  nl_cache_foreach(link_cache, &print_link, NULL);
166 
167  return 0;
168 }
int rtnl_cls_alloc_cache(struct nl_sock *sk, int ifindex, uint32_t parent, struct nl_cache **result)
Allocate a cache and fill it with all configured classifiers.
Definition: cls.c:328
struct rtnl_qdisc * rtnl_qdisc_get_by_parent(struct nl_cache *cache, int ifindex, uint32_t parent)
Search qdisc by interface index and parent.
Definition: qdisc.c:388
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
struct rtnl_qdisc * rtnl_class_leaf_qdisc(struct rtnl_class *class, struct nl_cache *cache)
Lookup the leaf qdisc of a traffic class.
Definition: class.c:278
int rtnl_class_alloc_cache(struct nl_sock *sk, int ifindex, struct nl_cache **result)
Allocate a cache and fill it with all configured traffic classes.
Definition: class.c:313
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 nl_cache_foreach(struct nl_cache *cache, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback on each element of the cache.
Definition: cache.c:1266
void rtnl_tc_set_ifindex(struct rtnl_tc *tc, int ifindex)
Set interface index of traffic control object.
Definition: tc.c:279
#define TC_CAST(ptr)
Macro to cast qdisc/class/classifier to tc object.
Definition: tc.h:56
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
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