mac80211: add key flag for management keys

Mark keys that might be used to receive management
frames so drivers can fall back on software crypto
for them if they don't support hardware offload.
As the new flag is only set correctly for RX keys
and the existing IEEE80211_KEY_FLAG_SW_MGMT flag
can only affect TX, also rename the latter to
IEEE80211_KEY_FLAG_SW_MGMT_TX.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 71f8262fc1d..82558c8decf 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -973,21 +973,29 @@ static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
  *      generation in software.
  * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates
  *      that the key is pairwise rather then a shared key.
- * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a
+ * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a
  *      CCMP key if it requires CCMP encryption of management frames (MFP) to
  *      be done in software.
  * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver
  *      if space should be prepared for the IV, but the IV
  *      itself should not be generated. Do not set together with
  *      @IEEE80211_KEY_FLAG_GENERATE_IV on the same key.
+ * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received
+ *      management frames. The flag can help drivers that have a hardware
+ *      crypto implementation that doesn't deal with management frames
+ *      properly by allowing them to not upload the keys to hardware and
+ *      fall back to software crypto. Note that this flag deals only with
+ *      RX, if your crypto engine can't deal with TX you can also set the
+ *      %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW.
  */
 enum ieee80211_key_flags {
         IEEE80211_KEY_FLAG_WMM_STA      = 1<<0,
         IEEE80211_KEY_FLAG_GENERATE_IV  = 1<<1,
         IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
         IEEE80211_KEY_FLAG_PAIRWISE     = 1<<3,
-        IEEE80211_KEY_FLAG_SW_MGMT      = 1<<4,
+        IEEE80211_KEY_FLAG_SW_MGMT_TX   = 1<<4,
         IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5,
+        IEEE80211_KEY_FLAG_RX_MGMT      = 1<<6,
 };
 
 /**