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 = {
54 .dp_type = NL_DUMP_LINE,
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 }
NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:22
nl_dump_params::dp_type
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
rtnl_cls_delete
int rtnl_cls_delete(struct nl_sock *sk, struct rtnl_cls *cls, int flags)
Delete classifier.
Definition: cls.c:296
rtnl_link
Link object.
nl_cache_foreach_filter
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
nl_cache_free
void nl_cache_free(struct nl_cache *cache)
Free a cache.
Definition: cache.c:409
nl_cache_foreach
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
nl_object_dump
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
rtnl_tc_get_parent
uint32_t rtnl_tc_get_parent(struct rtnl_tc *tc)
Return parent identifier of a traffic control object.
Definition: tc.c:518
nl_cli_parse_u32
uint32_t nl_cli_parse_u32(const char *arg)
Parse a text based 32 bit unsigned integer argument.
Definition: utils.c:43
nl_cli_fatal
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:78
nl_dump_params
Dumping parameters.
Definition: types.h:33
rtnl_link_get_ifindex
int rtnl_link_get_ifindex(struct rtnl_link *link)
Return interface index of link object.
Definition: link.c:2202
rtnl_tc_get_ifindex
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:294