libnl  3.5.0
nl-cls-delete.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/nl-cls-delete.c Delete Classifier
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) 2008-2010 Thomas Graf <tgraf@suug.ch>
11  */
12 
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/cls.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-cls-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 classifer 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 classifier (e.g. basic, u32, fw)\n"
38 " --proto=PROTO Protocol to match (default: all)\n"
39 " --prio=PRIO Priority (default: 0)\n"
40 "\n"
41 "EXAMPLE\n"
42 " # Delete all classifiers on eth0 attached to parent q_root:\n"
43 " $ nl-cls-delete --dev eth0 --parent q_root:\n"
44 "\n"
45  );
46 
47  exit(0);
48 }
49 
50 static void delete_cb(struct nl_object *obj, void *arg)
51 {
52  struct rtnl_cls *cls = nl_object_priv(obj);
53  struct nl_dump_params params = {
55  .dp_fd = stdout,
56  };
57  int err;
58 
59  if (interactive && !nl_cli_confirm(obj, &params, default_yes))
60  return;
61 
62  if ((err = rtnl_cls_delete(sock, cls, 0)) < 0)
63  nl_cli_fatal(err, "Unable to delete classifier: %s\n",
64  nl_geterror(err));
65 
66  if (!quiet) {
67  printf("Deleted ");
68  nl_object_dump(obj, &params);
69  }
70 
71  deleted++;
72 }
73 
74 static void __delete_link(int ifindex, struct rtnl_cls *filter)
75 {
76  struct nl_cache *cache;
77  uint32_t parent = rtnl_tc_get_parent((struct rtnl_tc *) filter);
78 
79  cache = nl_cli_cls_alloc_cache(sock, ifindex, parent);
80  nl_cache_foreach_filter(cache, OBJ_CAST(filter), delete_cb, NULL);
81  nl_cache_free(cache);
82 }
83 
84 static void delete_link(struct nl_object *obj, void *arg)
85 {
86  struct rtnl_link *link = nl_object_priv(obj);
87 
88  __delete_link(rtnl_link_get_ifindex(link), arg);
89 }
90 
91 int main(int argc, char *argv[])
92 {
93  struct rtnl_cls *cls;
94  struct rtnl_tc *tc;
95  struct nl_cache *link_cache;
96  int ifindex;
97 
98  sock = nl_cli_alloc_socket();
99  nl_cli_connect(sock, NETLINK_ROUTE);
100  link_cache = nl_cli_link_alloc_cache(sock);
101  cls = nl_cli_cls_alloc();
102  tc = (struct rtnl_tc *) cls;
103 
104  for (;;) {
105  int c, optidx = 0;
106  enum {
107  ARG_YES = 257,
108  ARG_INTERACTIVE = 258,
109  ARG_PROTO,
110  ARG_PRIO,
111  };
112  static struct option long_opts[] = {
113  { "interactive", 0, 0, ARG_INTERACTIVE },
114  { "yes", 0, 0, ARG_YES },
115  { "quiet", 0, 0, 'q' },
116  { "help", 0, 0, 'h' },
117  { "version", 0, 0, 'v' },
118  { "dev", 1, 0, 'd' },
119  { "parent", 1, 0, 'p' },
120  { "id", 1, 0, 'i' },
121  { "kind", 1, 0, 'k' },
122  { "proto", 1, 0, ARG_PROTO },
123  { "prio", 1, 0, ARG_PRIO },
124  { 0, 0, 0, 0 }
125  };
126 
127  c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
128  if (c == -1)
129  break;
130 
131  switch (c) {
132  case '?': nl_cli_fatal(EINVAL, "Invalid options");
133  case ARG_INTERACTIVE: interactive = 1; break;
134  case ARG_YES: default_yes = 1; break;
135  case 'q': quiet = 1; break;
136  case 'h': print_usage(); break;
137  case 'v': nl_cli_print_version(); break;
138  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
139  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
140  case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
141  case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
142  case ARG_PROTO: nl_cli_cls_parse_proto(cls, optarg); break;
143  case ARG_PRIO:
144  rtnl_cls_set_prio(cls, nl_cli_parse_u32(optarg));
145  break;
146  }
147  }
148 
149  if ((ifindex = rtnl_tc_get_ifindex(tc)))
150  __delete_link(ifindex, cls);
151  else
152  nl_cache_foreach(link_cache, delete_link, cls);
153 
154  if (!quiet)
155  printf("Deleted %d classs\n", deleted);
156 
157  return 0;
158 }
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
int rtnl_cls_delete(struct nl_sock *sk, struct rtnl_cls *cls, int flags)
Delete classifier.
Definition: cls.c:296
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_cache_free(struct nl_cache *cache)
Free a cache.
Definition: cache.c:409
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 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
uint32_t nl_cli_parse_u32(const char *arg)
Parse a text based 32 bit unsigned integer argument.
Definition: utils.c:43
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_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:294