Merge branch 'VLAN-tag-handling-cleanup'

Michał Mirosław says:

====================
VLAN tag handling cleanup

This is a cleanup set after VLAN_TAG_PRESENT removal. The CFI bit
handling is made similar to how other tag fields are used.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/emulex/benet/be_main.c

@@ -796,7 +796,7 @@ static inline u16 be_get_tx_vlan_tag(struct be_adapter *adapter,
 	u16 vlan_tag;
 
 	vlan_tag = skb_vlan_tag_get(skb);
-	vlan_prio = (vlan_tag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+	vlan_prio = skb_vlan_tag_get_prio(skb);
 	/* If vlan priority provided by OS is NOT in available bmap */
 	if (!(adapter->vlan_prio_bmap & (1 << vlan_prio)))
 		vlan_tag = (vlan_tag & ~VLAN_PRIO_MASK) |

drivers/net/ethernet/mellanox/mlx5/core/en_tx.c

@@ -127,7 +127,7 @@ u16 mlx5e_select_queue(struct net_device *dev, struct sk_buff *skb,
 	else
 #endif
 		if (skb_vlan_tag_present(skb))
-			up = skb->vlan_tci >> VLAN_PRIO_SHIFT;
+			up = skb_vlan_tag_get_prio(skb);
 
 	/* channel_ix can be larger than num_channels since
 	 * dev->num_real_tx_queues = num_channels * num_tc

drivers/net/hyperv/netvsc_drv.c

@@ -605,9 +605,9 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
 				     IEEE_8021Q_INFO);
 
 		vlan->value = 0;
-		vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK;
-		vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >>
-				VLAN_PRIO_SHIFT;
+		vlan->vlanid = skb_vlan_tag_get_id(skb);
+		vlan->cfi = skb_vlan_tag_get_cfi(skb);
+		vlan->pri = skb_vlan_tag_get_prio(skb);
 	}
 
 	if (skb_is_gso(skb)) {
@@ -781,7 +781,8 @@ static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
 	}
 
 	if (vlan) {
-		u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT);
+		u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT) |
+			(vlan->cfi ? VLAN_CFI_MASK : 0);
 
 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 				       vlan_tci);

include/linux/if_vlan.h

@@ -65,7 +65,7 @@ static inline struct vlan_ethhdr *vlan_eth_hdr(const struct sk_buff *skb)
 
 #define VLAN_PRIO_MASK		0xe000 /* Priority Code Point */
 #define VLAN_PRIO_SHIFT		13
-#define VLAN_CFI_MASK		0x1000 /* Canonical Format Indicator */
+#define VLAN_CFI_MASK		0x1000 /* Canonical Format Indicator / Drop Eligible Indicator */
 #define VLAN_VID_MASK		0x0fff /* VLAN Identifier */
 #define VLAN_N_VID		4096
 
@@ -80,6 +80,7 @@ static inline bool is_vlan_dev(const struct net_device *dev)
 #define skb_vlan_tag_present(__skb)	((__skb)->vlan_present)
 #define skb_vlan_tag_get(__skb)		((__skb)->vlan_tci)
 #define skb_vlan_tag_get_id(__skb)	((__skb)->vlan_tci & VLAN_VID_MASK)
+#define skb_vlan_tag_get_cfi(__skb)	(!!((__skb)->vlan_tci & VLAN_CFI_MASK))
 #define skb_vlan_tag_get_prio(__skb)	(((__skb)->vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT)
 
 static inline int vlan_get_rx_ctag_filter_info(struct net_device *dev)