mac80211: use ieee80211 frame control directly

Remove the last users of the rx/tx_data->fc data members and use the
le16 frame_control from the header directly.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 26 insertions, 27 deletions

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 4e9631c..3a96251 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -867,16 +867,18 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
 {
 	struct ieee80211_hdr *hdr;
 	u16 sc;
+	__le16 fc;
 	unsigned int frag, seq;
 	struct ieee80211_fragment_entry *entry;
 	struct sk_buff *skb;
 	DECLARE_MAC_BUF(mac);
 
 	hdr = (struct ieee80211_hdr *)rx->skb->data;
+	fc = hdr->frame_control;
 	sc = le16_to_cpu(hdr->seq_ctrl);
 	frag = sc & IEEE80211_SCTL_FRAG;
 
-	if (likely((!ieee80211_has_morefrags(hdr->frame_control) && frag == 0) ||
+	if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
 		   (rx->skb)->len < 24 ||
 		   is_multicast_ether_addr(hdr->addr1))) {
 		/* not fragmented */
@@ -891,7 +893,7 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
 		entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
 						 rx->queue, &(rx->skb));
 		if (rx->key && rx->key->conf.alg == ALG_CCMP &&
-		    ieee80211_has_protected(hdr->frame_control)) {
+		    ieee80211_has_protected(fc)) {
 			/* Store CCMP PN so that we can verify that the next
 			 * fragment has a sequential PN value. */
 			entry->ccmp = 1;
@@ -930,11 +932,11 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
 		memcpy(entry->last_pn, pn, CCMP_PN_LEN);
 	}
 
-	skb_pull(rx->skb, ieee80211_hdrlen(hdr->frame_control));
+	skb_pull(rx->skb, ieee80211_hdrlen(fc));
 	__skb_queue_tail(&entry->skb_list, rx->skb);
 	entry->last_frag = frag;
 	entry->extra_len += rx->skb->len;
-	if (rx->fc & IEEE80211_FCTL_MOREFRAGS) {
+	if (ieee80211_has_morefrags(fc)) {
 		rx->skb = NULL;
 		return RX_QUEUED;
 	}
@@ -974,10 +976,9 @@ ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx)
 	struct sk_buff *skb;
 	int no_pending_pkts;
 	DECLARE_MAC_BUF(mac);
+	__le16 fc = ((struct ieee80211_hdr *)rx->skb->data)->frame_control;
 
-	if (likely(!rx->sta ||
-		   (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL ||
-		   (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL ||
+	if (likely(!rx->sta || !ieee80211_is_pspoll(fc) ||
 		   !(rx->flags & IEEE80211_RX_RA_MATCH)))
 		return RX_CONTINUE;
 
@@ -1073,7 +1074,7 @@ ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
 }
 
 static int
-ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx)
+ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
 {
 	/*
 	 * Pass through unencrypted frames if the hardware has
@@ -1083,9 +1084,8 @@ ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx)
 		return 0;
 
 	/* Drop unencrypted frames if key is set. */
-	if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) &&
-		     (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
-		     (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
+	if (unlikely(!ieee80211_has_protected(fc) &&
+		     !ieee80211_is_nullfunc(fc) &&
 		     (rx->key || rx->sdata->drop_unencrypted)))
 		return -EACCES;
 
@@ -1184,7 +1184,7 @@ ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
 /*
  * requires that rx->skb is a frame with ethernet header
  */
-static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx)
+static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
 {
 	static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
 		= { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
@@ -1200,7 +1200,7 @@ static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx)
 		return true;
 
 	if (ieee80211_802_1x_port_control(rx) ||
-	    ieee80211_drop_unencrypted(rx))
+	    ieee80211_drop_unencrypted(rx, fc))
 		return false;
 
 	return true;
@@ -1270,20 +1270,21 @@ ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
 {
 	struct net_device *dev = rx->dev;
 	struct ieee80211_local *local = rx->local;
-	u16 fc, ethertype;
+	u16 ethertype;
 	u8 *payload;
 	struct sk_buff *skb = rx->skb, *frame = NULL;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	__le16 fc = hdr->frame_control;
 	const struct ethhdr *eth;
 	int remaining, err;
 	u8 dst[ETH_ALEN];
 	u8 src[ETH_ALEN];
 	DECLARE_MAC_BUF(mac);
 
-	fc = rx->fc;
-	if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
+	if (unlikely(!ieee80211_is_data(fc)))
 		return RX_CONTINUE;
 
-	if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
+	if (unlikely(!ieee80211_is_data_present(fc)))
 		return RX_DROP_MONITOR;
 
 	if (!(rx->flags & IEEE80211_RX_AMSDU))
@@ -1365,7 +1366,7 @@ ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
 			memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
 		}
 
-		if (!ieee80211_frame_allowed(rx)) {
+		if (!ieee80211_frame_allowed(rx, fc)) {
 			if (skb == frame) /* last frame */
 				return RX_DROP_UNUSABLE;
 			dev_kfree_skb(frame);
@@ -1439,21 +1440,21 @@ static ieee80211_rx_result debug_noinline
 ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
 {
 	struct net_device *dev = rx->dev;
-	u16 fc;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	__le16 fc = hdr->frame_control;
 	int err;
 
-	fc = rx->fc;
-	if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
+	if (unlikely(!ieee80211_is_data(hdr->frame_control)))
 		return RX_CONTINUE;
 
-	if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
+	if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
 		return RX_DROP_MONITOR;
 
 	err = ieee80211_data_to_8023(rx);
 	if (unlikely(err))
 		return RX_DROP_UNUSABLE;
 
-	if (!ieee80211_frame_allowed(rx))
+	if (!ieee80211_frame_allowed(rx, fc))
 		return RX_DROP_MONITOR;
 
 	rx->skb->dev = dev;
@@ -1818,13 +1819,12 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
 	struct ieee80211_sub_if_data *sdata;
 	struct ieee80211_hdr *hdr;
 	struct ieee80211_rx_data rx;
-	u16 type;
 	int prepares;
 	struct ieee80211_sub_if_data *prev = NULL;
 	struct sk_buff *skb_new;
 	u8 *bssid;
 
-	hdr = (struct ieee80211_hdr *) skb->data;
+	hdr = (struct ieee80211_hdr *)skb->data;
 	memset(&rx, 0, sizeof(rx));
 	rx.skb = skb;
 	rx.local = local;
@@ -1832,9 +1832,8 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
 	rx.status = status;
 	rx.rate = rate;
 	rx.fc = le16_to_cpu(hdr->frame_control);
-	type = rx.fc & IEEE80211_FCTL_FTYPE;
 
-	if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
+	if (ieee80211_is_data(hdr->frame_control) || ieee80211_is_mgmt(hdr->frame_control))
 		local->dot11ReceivedFragmentCount++;
 
 	rx.sta = sta_info_get(local, hdr->addr2);