libnl  3.5.0
nl-class-delete.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/nl-class-delete.c Delete Traffic Classes
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) 2010 Thomas Graf <tgraf@suug.ch>
11  */
12 
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/class.h>
15 #include <netlink/cli/link.h>
16 
17 #include <linux/netlink.h>
18 
19 static int quiet = 0, default_yes = 0, deleted = 0, interactive = 0;
20 static struct nl_sock *sock;
21 
22 static void print_usage(void)
23 {
24  printf(
25  "Usage: nl-class-delete [OPTION]... [class]\n"
26  "\n"
27  "OPTIONS\n"
28  " --interactive Run interactively.\n"
29  " --yes Set default answer to yes.\n"
30  " -q, --quiet Do not print informal notifications.\n"
31  " -h, --help Show this help text and exit.\n"
32  " -v, --version Show versioning information and exit.\n"
33  "\n"
34  " -d, --dev=DEV Device the class is attached to.\n"
35  " -p, --parent=ID Identifier of parent qdisc/class.\n"
36  " -i, --id=ID Identifier\n"
37  " -k, --kind=NAME Kind of class (e.g. pfifo_fast)\n"
38  "\n"
39  "EXAMPLE\n"
40  " # Delete all classes on eth0 attached to parent 1:\n"
41  " $ nl-class-delete --dev eth0 --parent 1:\n"
42  "\n"
43  );
44 
45  exit(0);
46 }
47 
48 static void delete_cb(struct nl_object *obj, void *arg)
49 {
50  struct rtnl_class *class = nl_object_priv(obj);
51  struct nl_dump_params params = {
53  .dp_fd = stdout,
54  };
55  int err;
56 
57  if (interactive && !nl_cli_confirm(obj, &params, default_yes))
58  return;
59 
60  if ((err = rtnl_class_delete(sock, class)) < 0)
61  nl_cli_fatal(err, "Unable to delete class: %s\n", nl_geterror(err));
62 
63  if (!quiet) {
64  printf("Deleted ");
65  nl_object_dump(obj, &params);
66  }
67 
68  deleted++;
69 }
70 
71 int main(int argc, char *argv[])
72 {
73  struct rtnl_class *class;
74  struct rtnl_tc *tc;
75  struct nl_cache *link_cache, *class_cache;
76 
77  sock = nl_cli_alloc_socket();
78  nl_cli_connect(sock, NETLINK_ROUTE);
79  link_cache = nl_cli_link_alloc_cache(sock);
80  class = nl_cli_class_alloc();
81  tc = (struct rtnl_tc *) class;
82 
83  for (;;) {
84  int c, optidx = 0;
85  enum {
86  ARG_YES = 257,
87  ARG_INTERACTIVE = 258,
88  };
89  static struct option long_opts[] = {
90  { "interactive", 0, 0, ARG_INTERACTIVE },
91  { "yes", 0, 0, ARG_YES },
92  { "quiet", 0, 0, 'q' },
93  { "help", 0, 0, 'h' },
94  { "version", 0, 0, 'v' },
95  { "dev", 1, 0, 'd' },
96  { "parent", 1, 0, 'p' },
97  { "id", 1, 0, 'i' },
98  { "kind", 1, 0, 'k' },
99  { 0, 0, 0, 0 }
100  };
101 
102  c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
103  if (c == -1)
104  break;
105 
106  switch (c) {
107  case '?': nl_cli_fatal(EINVAL, "Invalid options");
108  case ARG_INTERACTIVE: interactive = 1; break;
109  case ARG_YES: default_yes = 1; break;
110  case 'q': quiet = 1; break;
111  case 'h': print_usage(); break;
112  case 'v': nl_cli_print_version(); break;
113  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
114  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
115  case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
116  case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
117  }
118  }
119 
120  if (!rtnl_tc_get_ifindex(tc))
121  nl_cli_fatal(EINVAL, "You must specify a network device (--dev=XXX)");
122 
123  class_cache = nl_cli_class_alloc_cache(sock, rtnl_tc_get_ifindex(tc));
124 
125  nl_cache_foreach_filter(class_cache, OBJ_CAST(class), delete_cb, NULL);
126 
127  if (!quiet)
128  printf("Deleted %d classs\n", deleted);
129 
130  return 0;
131 }
Dump object briefly on one line.
Definition: types.h:22
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
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
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_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:78
Dumping parameters.
Definition: types.h:33
int rtnl_class_delete(struct nl_sock *sk, struct rtnl_class *class)
Delete traffic class.
Definition: class.c:253
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:294