mac80211: add control port protocol TX control flag

A lot of drivers check the frame protocol for ETH_P_PAE,
for various reasons (like making those more reliable).
Add a new flags bitmap to the TX control info and a new
flag indicating the control port protocol is in use to
let all drivers also apply such logic to other control
port protocols, should they be configured.

Also use the new flag in the iwlwifi drivers.

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

1 files changed, 16 insertions, 3 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9cda372..b70c001 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -375,7 +375,7 @@ struct ieee80211_bss_conf {
 };
 
 /**
- * enum mac80211_tx_control_flags - flags to describe transmission information/status
+ * enum mac80211_tx_info_flags - flags to describe transmission information/status
  *
  * These flags are used with the @flags member of &ieee80211_tx_info.
  *
@@ -471,7 +471,7 @@ struct ieee80211_bss_conf {
  * Note: If you have to add new flags to the enumeration, then don't
  *	 forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary.
  */
-enum mac80211_tx_control_flags {
+enum mac80211_tx_info_flags {
 	IEEE80211_TX_CTL_REQ_TX_STATUS		= BIT(0),
 	IEEE80211_TX_CTL_ASSIGN_SEQ		= BIT(1),
 	IEEE80211_TX_CTL_NO_ACK			= BIT(2),
@@ -507,6 +507,18 @@ enum mac80211_tx_control_flags {
 
 #define IEEE80211_TX_CTL_STBC_SHIFT		23
 
+/**
+ * enum mac80211_tx_control_flags - flags to describe transmit control
+ *
+ * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control
+ *	protocol frame (e.g. EAP)
+ *
+ * These flags are used in tx_info->control.flags.
+ */
+enum mac80211_tx_control_flags {
+	IEEE80211_TX_CTRL_PORT_CTRL_PROTO	= BIT(0),
+};
+
 /*
  * This definition is used as a mask to clear all temporary flags, which are
  * set by the tx handlers for each transmission attempt by the mac80211 stack.
@@ -680,7 +692,8 @@ struct ieee80211_tx_info {
 			/* NB: vif can be NULL for injected frames */
 			struct ieee80211_vif *vif;
 			struct ieee80211_key_conf *hw_key;
-			/* 8 bytes free */
+			u32 flags;
+			/* 4 bytes free */
 		} control;
 		struct {
 			struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES];