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[3/9] mac80211: add flag for duplication check

Message ID 1449583479-26658-4-git-send-email-emmanuel.grumbach@intel.com (mailing list archive)
State Accepted
Delegated to: Johannes Berg
Headers show

Commit Message

Emmanuel Grumbach Dec. 8, 2015, 2:04 p.m. UTC 
From: Sara Sharon <sara.sharon@intel.com>

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 duplcation check
per queue.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
---
 include/net/mac80211.h | 2 +-
 net/mac80211/rx.c      | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 71be30d..f4cbad4 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -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),
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index c4198d48..901c72b 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -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")