include/net/dropreason.h

   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  */
  10 enum 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         /** @SKB_DROP_REASON_SUBSYS_NUM: number of subsystems defined */
  27         SKB_DROP_REASON_SUBSYS_NUM
  28 };
  29
  30 struct drop_reason_list {
  31         const char * const *reasons;
  32         size_t n_reasons;
  33 };
  34
  35 /* Note: due to dynamic registrations, access must be under RCU */
  36 extern const struct drop_reason_list __rcu *
  37 drop_reasons_by_subsys[SKB_DROP_REASON_SUBSYS_NUM];
  38
  39 void drop_reasons_register_subsys(enum skb_drop_reason_subsys subsys,
  40                                   const struct drop_reason_list *list);
  41 void drop_reasons_unregister_subsys(enum skb_drop_reason_subsys subsys);
  42
  43 #endif