libnl  3.6.0
nl-class-delete.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/class.h>
8 #include <netlink/cli/link.h>
9 
10 #include <linux/netlink.h>
11 
12 static int quiet = 0, default_yes = 0, deleted = 0, interactive = 0;
13 static struct nl_sock *sock;
14 
15 static void print_usage(void)
16 {
17  printf(
18  "Usage: nl-class-delete [OPTION]... [class]\n"
19  "\n"
20  "OPTIONS\n"
21  " --interactive Run interactively.\n"
22  " --yes Set default answer to yes.\n"
23  " -q, --quiet Do not print informal notifications.\n"
24  " -h, --help Show this help text and exit.\n"
25  " -v, --version Show versioning information and exit.\n"
26  "\n"
27  " -d, --dev=DEV Device the class is attached to.\n"
28  " -p, --parent=ID Identifier of parent qdisc/class.\n"
29  " -i, --id=ID Identifier\n"
30  " -k, --kind=NAME Kind of class (e.g. pfifo_fast)\n"
31  "\n"
32  "EXAMPLE\n"
33  " # Delete all classes on eth0 attached to parent 1:\n"
34  " $ nl-class-delete --dev eth0 --parent 1:\n"
35  "\n"
36  );
37 
38  exit(0);
39 }
40 
41 static void delete_cb(struct nl_object *obj, void *arg)
42 {
43  struct rtnl_class *class = nl_object_priv(obj);
44  struct nl_dump_params params = {
46  .dp_fd = stdout,
47  };
48  int err;
49 
50  if (interactive && !nl_cli_confirm(obj, &params, default_yes))
51  return;
52 
53  if ((err = rtnl_class_delete(sock, class)) < 0)
54  nl_cli_fatal(err, "Unable to delete class: %s\n", nl_geterror(err));
55 
56  if (!quiet) {
57  printf("Deleted ");
58  nl_object_dump(obj, &params);
59  }
60 
61  deleted++;
62 }
63 
64 int main(int argc, char *argv[])
65 {
66  struct rtnl_class *class;
67  struct rtnl_tc *tc;
68  struct nl_cache *link_cache, *class_cache;
69 
70  sock = nl_cli_alloc_socket();
71  nl_cli_connect(sock, NETLINK_ROUTE);
72  link_cache = nl_cli_link_alloc_cache(sock);
73  class = nl_cli_class_alloc();
74  tc = (struct rtnl_tc *) class;
75 
76  for (;;) {
77  int c, optidx = 0;
78  enum {
79  ARG_YES = 257,
80  ARG_INTERACTIVE = 258,
81  };
82  static struct option long_opts[] = {
83  { "interactive", 0, 0, ARG_INTERACTIVE },
84  { "yes", 0, 0, ARG_YES },
85  { "quiet", 0, 0, 'q' },
86  { "help", 0, 0, 'h' },
87  { "version", 0, 0, 'v' },
88  { "dev", 1, 0, 'd' },
89  { "parent", 1, 0, 'p' },
90  { "id", 1, 0, 'i' },
91  { "kind", 1, 0, 'k' },
92  { 0, 0, 0, 0 }
93  };
94 
95  c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
96  if (c == -1)
97  break;
98 
99  switch (c) {
100  case '?': nl_cli_fatal(EINVAL, "Invalid options");
101  case ARG_INTERACTIVE: interactive = 1; break;
102  case ARG_YES: default_yes = 1; break;
103  case 'q': quiet = 1; break;
104  case 'h': print_usage(); break;
105  case 'v': nl_cli_print_version(); break;
106  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
107  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
108  case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
109  case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
110  }
111  }
112 
113  if (!rtnl_tc_get_ifindex(tc))
114  nl_cli_fatal(EINVAL, "You must specify a network device (--dev=XXX)");
115 
116  class_cache = nl_cli_class_alloc_cache(sock, rtnl_tc_get_ifindex(tc));
117 
118  nl_cache_foreach_filter(class_cache, OBJ_CAST(class), delete_cb, NULL);
119 
120  if (!quiet)
121  printf("Deleted %d classs\n", deleted);
122 
123  return 0;
124 }
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
int rtnl_class_delete(struct nl_sock *sk, struct rtnl_class *class)
Delete traffic class.
Definition: class.c:246
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_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:287
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:16
Dumping parameters.
Definition: types.h:28
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:32