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baa951a1c1
It can be really hard to analyse or debug why packets are going missing in mac80211, so add the needed infrastructure to use use the new per-subsystem drop reasons. We actually use two drop reason subsystems here because of the different handling of frames that are dropped but still go to monitor for old versions of hostapd, and those that are just completely unusable (e.g. crypto failed.) Annotate a few reasons here just to illustrate this, we'll need to go through and annotate more of them later. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _LINUX_DROPREASON_H
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#define _LINUX_DROPREASON_H
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#include <net/dropreason-core.h>
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/**
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* enum skb_drop_reason_subsys - subsystem tag for (extended) drop reasons
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*/
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enum skb_drop_reason_subsys {
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/** @SKB_DROP_REASON_SUBSYS_CORE: core drop reasons defined above */
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SKB_DROP_REASON_SUBSYS_CORE,
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/**
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* @SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE: mac80211 drop reasons
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* for unusable frames, see net/mac80211/drop.h
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*/
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SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
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/**
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* @SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR: mac80211 drop reasons
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* for frames still going to monitor, see net/mac80211/drop.h
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*/
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SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
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/** @SKB_DROP_REASON_SUBSYS_NUM: number of subsystems defined */
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SKB_DROP_REASON_SUBSYS_NUM
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};
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struct drop_reason_list {
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const char * const *reasons;
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size_t n_reasons;
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};
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/* Note: due to dynamic registrations, access must be under RCU */
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extern const struct drop_reason_list __rcu *
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drop_reasons_by_subsys[SKB_DROP_REASON_SUBSYS_NUM];
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void drop_reasons_register_subsys(enum skb_drop_reason_subsys subsys,
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const struct drop_reason_list *list);
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void drop_reasons_unregister_subsys(enum skb_drop_reason_subsys subsys);
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#endif
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