1/* SPDX-License-Identifier: GPL-2.0-or-later */
2
3#ifndef _LINUX_DROPREASON_H
4#define _LINUX_DROPREASON_H
5#include <net/dropreason-core.h>
6
7/**
8 * enum skb_drop_reason_subsys - subsystem tag for (extended) drop reasons
9 */
10enum skb_drop_reason_subsys {
11	/** @SKB_DROP_REASON_SUBSYS_CORE: core drop reasons defined above */
12	SKB_DROP_REASON_SUBSYS_CORE,
13
14	/**
15	 * @SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE: mac80211 drop reasons
16	 * for unusable frames, see net/mac80211/drop.h
17	 */
18	SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
19
20	/**
21	 * @SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR: mac80211 drop reasons
22	 * for frames still going to monitor, see net/mac80211/drop.h
23	 */
24	SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
25
26	/**
27	 * @SKB_DROP_REASON_SUBSYS_OPENVSWITCH: openvswitch drop reasons,
28	 * see net/openvswitch/drop.h
29	 */
30	SKB_DROP_REASON_SUBSYS_OPENVSWITCH,
31
32	/** @SKB_DROP_REASON_SUBSYS_NUM: number of subsystems defined */
33	SKB_DROP_REASON_SUBSYS_NUM
34};
35
36struct drop_reason_list {
37	const char * const *reasons;
38	size_t n_reasons;
39};
40
41/* Note: due to dynamic registrations, access must be under RCU */
42extern const struct drop_reason_list __rcu *
43drop_reasons_by_subsys[SKB_DROP_REASON_SUBSYS_NUM];
44
45void drop_reasons_register_subsys(enum skb_drop_reason_subsys subsys,
46				  const struct drop_reason_list *list);
47void drop_reasons_unregister_subsys(enum skb_drop_reason_subsys subsys);
48
49#endif
50