libnl  3.7.0
nl-cls-delete.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * Copyright (c) 2008-2010 Thomas Graf <tgraf@suug.ch>
4  */
5 
6 #include <netlink/cli/utils.h>
7 #include <netlink/cli/cls.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-cls-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 classifer 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 classifier (e.g. basic, u32, fw)\n"
31 " --proto=PROTO Protocol to match (default: all)\n"
32 " --prio=PRIO Priority (default: 0)\n"
33 "\n"
34 "EXAMPLE\n"
35 " # Delete all classifiers on eth0 attached to parent q_root:\n"
36 " $ nl-cls-delete --dev eth0 --parent q_root:\n"
37 "\n"
38  );
39 
40  exit(0);
41 }
42 
43 static void delete_cb(struct nl_object *obj, void *arg)
44 {
45  struct rtnl_cls *cls = nl_object_priv(obj);
46  struct nl_dump_params params = {
48  .dp_fd = stdout,
49  };
50  int err;
51 
52  if (interactive && !nl_cli_confirm(obj, &params, default_yes))
53  return;
54 
55  if ((err = rtnl_cls_delete(sock, cls, 0)) < 0)
56  nl_cli_fatal(err, "Unable to delete classifier: %s\n",
57  nl_geterror(err));
58 
59  if (!quiet) {
60  printf("Deleted ");
61  nl_object_dump(obj, &params);
62  }
63 
64  deleted++;
65 }
66 
67 static void __delete_link(int ifindex, struct rtnl_cls *filter)
68 {
69  struct nl_cache *cache;
70  uint32_t parent = rtnl_tc_get_parent((struct rtnl_tc *) filter);
71 
72  cache = nl_cli_cls_alloc_cache(sock, ifindex, parent);
73  nl_cache_foreach_filter(cache, OBJ_CAST(filter), delete_cb, NULL);
74  nl_cache_free(cache);
75 }
76 
77 static void delete_link(struct nl_object *obj, void *arg)
78 {
79  struct rtnl_link *link = nl_object_priv(obj);
80 
81  __delete_link(rtnl_link_get_ifindex(link), arg);
82 }
83 
84 int main(int argc, char *argv[])
85 {
86  struct rtnl_cls *cls;
87  struct rtnl_tc *tc;
88  struct nl_cache *link_cache;
89  int ifindex;
90 
91  sock = nl_cli_alloc_socket();
92  nl_cli_connect(sock, NETLINK_ROUTE);
93  link_cache = nl_cli_link_alloc_cache(sock);
94  cls = nl_cli_cls_alloc();
95  tc = (struct rtnl_tc *) cls;
96 
97  for (;;) {
98  int c, optidx = 0;
99  enum {
100  ARG_YES = 257,
101  ARG_INTERACTIVE = 258,
102  ARG_PROTO,
103  ARG_PRIO,
104  };
105  static struct option long_opts[] = {
106  { "interactive", 0, 0, ARG_INTERACTIVE },
107  { "yes", 0, 0, ARG_YES },
108  { "quiet", 0, 0, 'q' },
109  { "help", 0, 0, 'h' },
110  { "version", 0, 0, 'v' },
111  { "dev", 1, 0, 'd' },
112  { "parent", 1, 0, 'p' },
113  { "id", 1, 0, 'i' },
114  { "kind", 1, 0, 'k' },
115  { "proto", 1, 0, ARG_PROTO },
116  { "prio", 1, 0, ARG_PRIO },
117  { 0, 0, 0, 0 }
118  };
119 
120  c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
121  if (c == -1)
122  break;
123 
124  switch (c) {
125  case '?': nl_cli_fatal(EINVAL, "Invalid options");
126  case ARG_INTERACTIVE: interactive = 1; break;
127  case ARG_YES: default_yes = 1; break;
128  case 'q': quiet = 1; break;
129  case 'h': print_usage(); break;
130  case 'v': nl_cli_print_version(); break;
131  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
132  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
133  case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
134  case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
135  case ARG_PROTO: nl_cli_cls_parse_proto(cls, optarg); break;
136  case ARG_PRIO:
137  rtnl_cls_set_prio(cls, nl_cli_parse_u32(optarg));
138  break;
139  }
140  }
141 
142  if ((ifindex = rtnl_tc_get_ifindex(tc)))
143  __delete_link(ifindex, cls);
144  else
145  nl_cache_foreach(link_cache, delete_link, cls);
146 
147  if (!quiet)
148  printf("Deleted %d classs\n", deleted);
149 
150  return 0;
151 }
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:1277
void nl_cache_free(struct nl_cache *cache)
Free a cache.
Definition: cache.c:403
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_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:71
uint32_t nl_cli_parse_u32(const char *arg)
Parse a text based 32 bit unsigned integer argument.
Definition: utils.c:36
int rtnl_cls_delete(struct nl_sock *sk, struct rtnl_cls *cls, int flags)
Delete classifier.
Definition: cls.c:289
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
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