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Commit f9cfa5f3 authored Dec 08, 2015 by Sara Sharon Committed by Johannes Berg Jan 14, 2016

mac80211: add flag for duplication check



Add an option for driver to check for packet duplication
by itself.
This is needed for example by the iwlwifi driver which
parallelizes the RX path and does the duplication check
per queue.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent 23a1f8d4

include/net/mac80211.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -1063,7 +1063,7 @@ enum mac80211_rx_flags {
		RX_FLAG_HT_GF = BIT(13),
		RX_FLAG_AMPDU_DETAILS = BIT(14),
		RX_FLAG_PN_VALIDATED = BIT(15),
		/* bit 16 free */
		RX_FLAG_DUP_VALIDATED = BIT(16),
		RX_FLAG_AMPDU_LAST_KNOWN = BIT(17),
		RX_FLAG_AMPDU_IS_LAST = BIT(18),
		RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19),

net/mac80211/rx.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1099,6 +1099,9 @@ ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx)
		struct ieee80211_hdr hdr = (struct ieee80211_hdr )rx->skb->data;
		struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);

		if (status->flag & RX_FLAG_DUP_VALIDATED)
		return RX_CONTINUE;

		/*
		* Drop duplicate 802.11 retransmissions
		* (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")