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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>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* mac80211 drop reason list
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*
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* Copyright (C) 2023 Intel Corporation
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*/
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#ifndef MAC80211_DROP_H
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#define MAC80211_DROP_H
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#include <net/dropreason.h>
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typedef unsigned int __bitwise ieee80211_rx_result;
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#define MAC80211_DROP_REASONS_MONITOR(R) \
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R(RX_DROP_M_UNEXPECTED_4ADDR_FRAME) \
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R(RX_DROP_M_BAD_BCN_KEYIDX) \
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R(RX_DROP_M_BAD_MGMT_KEYIDX) \
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/* this line for the trailing \ - add before this */
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#define MAC80211_DROP_REASONS_UNUSABLE(R) \
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R(RX_DROP_U_MIC_FAIL) \
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R(RX_DROP_U_REPLAY) \
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R(RX_DROP_U_BAD_MMIE) \
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/* this line for the trailing \ - add before this */
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/* having two enums allows for checking ieee80211_rx_result use with sparse */
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enum ___mac80211_drop_reason {
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/* if we get to the end of handlers with RX_CONTINUE this will be the reason */
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___RX_CONTINUE = SKB_CONSUMED,
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/* this never gets used as an argument to kfree_skb_reason() */
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___RX_QUEUED = SKB_NOT_DROPPED_YET,
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#define ENUM(x) ___ ## x,
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___RX_DROP_MONITOR = SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR <<
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SKB_DROP_REASON_SUBSYS_SHIFT,
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MAC80211_DROP_REASONS_MONITOR(ENUM)
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___RX_DROP_UNUSABLE = SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE <<
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SKB_DROP_REASON_SUBSYS_SHIFT,
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MAC80211_DROP_REASONS_UNUSABLE(ENUM)
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#undef ENUM
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};
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enum mac80211_drop_reason {
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RX_CONTINUE = (__force ieee80211_rx_result)___RX_CONTINUE,
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RX_QUEUED = (__force ieee80211_rx_result)___RX_QUEUED,
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RX_DROP_MONITOR = (__force ieee80211_rx_result)___RX_DROP_MONITOR,
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RX_DROP_UNUSABLE = (__force ieee80211_rx_result)___RX_DROP_UNUSABLE,
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#define DEF(x) x = (__force ieee80211_rx_result)___ ## x,
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MAC80211_DROP_REASONS_MONITOR(DEF)
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MAC80211_DROP_REASONS_UNUSABLE(DEF)
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#undef DEF
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};
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#endif /* MAC80211_DROP_H */
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