Similar to skb_eth_hdr() introduced in commit
96cc4b69581d ("macvlan: do
not assume mac_header is set in macvlan_broadcast()"), let's introduce a
skb_vlan_eth_hdr() helper which can be used in TX-only code paths to get
to the VLAN header based on skb->data rather than based on the
skb_mac_header(skb).
We also consolidate the drivers that dereference skb->data to go through
this helper.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 files changed:
/* Skip VLAN tag if present */
if (ether_type == ETH_P_8021Q) {
/* Skip VLAN tag if present */
if (ether_type == ETH_P_8021Q) {
- struct vlan_ethhdr *vhdr =
- (struct vlan_ethhdr *)skb->data;
+ struct vlan_ethhdr *vhdr = skb_vlan_eth_hdr(skb);
ether_type = ntohs(vhdr->h_vlan_encapsulated_proto);
}
ether_type = ntohs(vhdr->h_vlan_encapsulated_proto);
}
struct be_wrb_params
*wrb_params)
{
struct be_wrb_params
*wrb_params)
{
- struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data;
+ struct vlan_ethhdr *veh = skb_vlan_eth_hdr(skb);
unsigned int eth_hdr_len;
struct iphdr *ip;
unsigned int eth_hdr_len;
struct iphdr *ip;
if (unlikely(rc < 0))
return rc;
if (unlikely(rc < 0))
return rc;
- vhdr = (struct vlan_ethhdr *)skb->data;
+ vhdr = skb_vlan_eth_hdr(skb);
vhdr->h_vlan_TCI |= cpu_to_be16((skb->priority << VLAN_PRIO_SHIFT)
& VLAN_PRIO_MASK);
vhdr->h_vlan_TCI |= cpu_to_be16((skb->priority << VLAN_PRIO_SHIFT)
& VLAN_PRIO_MASK);
rc = skb_cow_head(skb, 0);
if (rc < 0)
return rc;
rc = skb_cow_head(skb, 0);
if (rc < 0)
return rc;
- vhdr = (struct vlan_ethhdr *)skb->data;
+ vhdr = skb_vlan_eth_hdr(skb);
vhdr->h_vlan_TCI = htons(tx_flags >>
I40E_TX_FLAGS_VLAN_SHIFT);
} else {
vhdr->h_vlan_TCI = htons(tx_flags >>
I40E_TX_FLAGS_VLAN_SHIFT);
} else {
if (skb_cow_head(skb, 0))
goto out_drop;
if (skb_cow_head(skb, 0))
goto out_drop;
- vhdr = (struct vlan_ethhdr *)skb->data;
+ vhdr = skb_vlan_eth_hdr(skb);
vhdr->h_vlan_TCI = htons(tx_flags >>
IXGBE_TX_FLAGS_VLAN_SHIFT);
} else {
vhdr->h_vlan_TCI = htons(tx_flags >>
IXGBE_TX_FLAGS_VLAN_SHIFT);
} else {
if (protocol == cpu_to_be16(ETH_P_8021Q)) {
if (protocol == cpu_to_be16(ETH_P_8021Q)) {
- vh = (struct vlan_ethhdr *)skb->data;
+ vh = skb_vlan_eth_hdr(skb);
protocol = vh->h_vlan_encapsulated_proto;
flags = FLAGS_VLAN_TAGGED;
protocol = vh->h_vlan_encapsulated_proto;
flags = FLAGS_VLAN_TAGGED;
if (adapter->flags & QLCNIC_VLAN_FILTERING) {
if (protocol == ETH_P_8021Q) {
if (adapter->flags & QLCNIC_VLAN_FILTERING) {
if (protocol == ETH_P_8021Q) {
- vh = (struct vlan_ethhdr *)skb->data;
+ vh = skb_vlan_eth_hdr(skb);
vlan_id = ntohs(vh->h_vlan_TCI);
} else if (skb_vlan_tag_present(skb)) {
vlan_id = skb_vlan_tag_get(skb);
vlan_id = ntohs(vh->h_vlan_TCI);
} else if (skb_vlan_tag_present(skb)) {
vlan_id = skb_vlan_tag_get(skb);
u32 producer = tx_ring->producer;
if (protocol == ETH_P_8021Q) {
u32 producer = tx_ring->producer;
if (protocol == ETH_P_8021Q) {
- vh = (struct vlan_ethhdr *)skb->data;
+ vh = skb_vlan_eth_hdr(skb);
flags = QLCNIC_FLAGS_VLAN_TAGGED;
vlan_tci = ntohs(vh->h_vlan_TCI);
protocol = ntohs(vh->h_vlan_encapsulated_proto);
flags = QLCNIC_FLAGS_VLAN_TAGGED;
vlan_tci = ntohs(vh->h_vlan_TCI);
protocol = ntohs(vh->h_vlan_encapsulated_proto);
EFX_WARN_ON_ONCE_PARANOID(((struct ethhdr *)skb->data)->h_proto !=
protocol);
if (protocol == htons(ETH_P_8021Q)) {
EFX_WARN_ON_ONCE_PARANOID(((struct ethhdr *)skb->data)->h_proto !=
protocol);
if (protocol == htons(ETH_P_8021Q)) {
- struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data;
+ struct vlan_ethhdr *veh = skb_vlan_eth_hdr(skb);
protocol = veh->h_vlan_encapsulated_proto;
}
protocol = veh->h_vlan_encapsulated_proto;
}
static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb)
{
static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb)
{
- struct vlan_ethhdr *veth;
- __be16 vlan_proto;
+ struct vlan_ethhdr *veth = skb_vlan_eth_hdr(skb);
+ __be16 vlan_proto = veth->h_vlan_proto;
- veth = (struct vlan_ethhdr *)skb->data;
- vlan_proto = veth->h_vlan_proto;
-
if ((vlan_proto == htons(ETH_P_8021Q) &&
dev->features & NETIF_F_HW_VLAN_CTAG_RX) ||
(vlan_proto == htons(ETH_P_8021AD) &&
if ((vlan_proto == htons(ETH_P_8021Q) &&
dev->features & NETIF_F_HW_VLAN_CTAG_RX) ||
(vlan_proto == htons(ETH_P_8021AD) &&
/* Get ethernet protocol */
eth = (struct ethhdr *)skb->data;
if (ntohs(eth->h_proto) == ETH_P_8021Q) {
/* Get ethernet protocol */
eth = (struct ethhdr *)skb->data;
if (ntohs(eth->h_proto) == ETH_P_8021Q) {
- vlan_eth = (struct vlan_ethhdr *)skb->data;
+ vlan_eth = skb_vlan_eth_hdr(skb);
mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto);
network_data = skb->data + VLAN_ETH_HLEN;
nic_type |= NIC_TYPE_F_VLAN;
mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto);
network_data = skb->data + VLAN_ETH_HLEN;
nic_type |= NIC_TYPE_F_VLAN;
* driver based on the NIC mac
*/
if (nic_type & NIC_TYPE_F_VLAN) {
* driver based on the NIC mac
*/
if (nic_type & NIC_TYPE_F_VLAN) {
- struct vlan_ethhdr *vlan_eth = (struct vlan_ethhdr *)skb->data;
+ struct vlan_ethhdr *vlan_eth = skb_vlan_eth_hdr(skb);
nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK;
data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN);
nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK;
data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN);
return (struct vlan_ethhdr *)skb_mac_header(skb);
}
return (struct vlan_ethhdr *)skb_mac_header(skb);
}
+/* Prefer this version in TX path, instead of
+ * skb_reset_mac_header() + vlan_eth_hdr()
+ */
+static inline struct vlan_ethhdr *skb_vlan_eth_hdr(const struct sk_buff *skb)
+{
+ return (struct vlan_ethhdr *)skb->data;
+}
+
#define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */
#define VLAN_PRIO_SHIFT 13
#define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator / Drop Eligible Indicator */
#define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */
#define VLAN_PRIO_SHIFT 13
#define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator / Drop Eligible Indicator */
*/
static inline int __vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
{
*/
static inline int __vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
{
- struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data;
+ struct vlan_ethhdr *veth = skb_vlan_eth_hdr(skb);
if (!eth_type_vlan(veth->h_vlan_proto))
return -EINVAL;
if (!eth_type_vlan(veth->h_vlan_proto))
return -EINVAL;
if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
return false;
if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
return false;
- veh = (struct vlan_ethhdr *)skb->data;
+ veh = skb_vlan_eth_hdr(skb);
protocol = veh->h_vlan_encapsulated_proto;
}
protocol = veh->h_vlan_encapsulated_proto;
}
if (!pskb_may_pull(skb, VLAN_ETH_HLEN))
goto dropped;
if (!pskb_may_pull(skb, VLAN_ETH_HLEN))
goto dropped;
- vhdr = (struct vlan_ethhdr *)skb->data;
+ vhdr = skb_vlan_eth_hdr(skb);
/* drop batman-in-batman packets to prevent loops */
if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))
/* drop batman-in-batman packets to prevent loops */
if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))