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>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 8da483b2c06740e3f6327e42fed48c820109ab52..ecab934dc8d95b330a623727dcb51e04a0cb0773 100644 (file)
--- 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 a5668b54015fbec94db0b7c6cb81970be8c8d114..fe675d76f29c793ed6833174bb984408838620a5 100644 (file)
--- 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")