Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Platform regulatory domain support for ath10k, from Bartosz
    Markowski.

 2) Centralize min/max MTU checking, thus removing tons of duplicated
    code all of the the various drivers. From Jarod Wilson.

 3) Support ingress actions in act_mirred, from Shmulik Ladkani.

 4) Improve device adjacency tracking, from David Ahern.

 5) Add support for LED triggers on PHY link state changes, from Zach
    Brown.

 6) Improve UDP socket memory accounting, from Paolo Abeni.

 7) Set SK_MEM_QUANTUM to a fixed size of 4096, instead of PAGE_SIZE.
    From Eric Dumazet.

 8) Collapse TCP SKBs at retransmit time even if the right side SKB has
    frags. Also from Eric Dumazet.

 9) Add IP_RECVFRAGSIZE and IPV6_RECVFRAGSIZE cmsgs, from Willem de
    Bruijn.

10) Support routing by UID, from Lorenzo Colitti.

11) Handle L3 domain binding (ie. VRF) for RAW sockets, from David
    Ahern.

12) tcp_get_info() can run lockless, from Eric Dumazet.

13) 4-tuple UDP hashing in SFC driver, from Edward Cree.

14) Avoid reorders in GRO code, from Eric Dumazet.

15) IPV6 Segment Routing support, from David Lebrun.

16) Support MPLS push and pop for L3 packets in openvswitch, from Jiri
    Benc.

17) Add LRU datastructure support for BPF, Martin KaFai Lau.

18) VF support in liquidio driver, from Raghu Vatsavayi.

19) Multiqueue support in alx driver, from Tobias Regnery.

20) Networking cgroup BPF support, from Daniel Mack.

21) TCP chronograph measurements, from Francis Yan.

22) XDP support for qed driver, from Yuval Mintz.

23) BPF based lwtunnels, from Thomas Graf.

24) Consistent FIB dumping to offloading drivers, from Ido Schimmel.

25) Many optimizations for UDP under high load, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1522 commits)
  netfilter: nft_counter: rework atomic dump and reset
  e1000: use disable_hardirq() for e1000_netpoll()
  i40e: don't truncate match_method assignment
  net: ethernet: ti: netcp: add support of cpts
  net: phy: phy drivers should not set SUPPORTED_[Asym_]Pause
  net: l2tp: ppp: change PPPOL2TP_MSG_* => L2TP_MSG_*
  net: l2tp: deprecate PPPOL2TP_MSG_* in favour of L2TP_MSG_*
  net: l2tp: export debug flags to UAPI
  net: ethernet: stmmac: remove private tx queue lock
  net: ethernet: sxgbe: remove private tx queue lock
  net: bridge: shorten ageing time on topology change
  net: bridge: add helper to set topology change
  net: bridge: add helper to offload ageing time
  net: nicvf: use new api ethtool_{get|set}_link_ksettings
  net: ethernet: ti: cpsw: sync rates for channels in dual emac mode
  net: ethernet: ti: cpsw: re-split res only when speed is changed
  net: ethernet: ti: cpsw: combine budget and weight split and check
  net: ethernet: ti: cpsw: don't start queue twice
  net: ethernet: ti: cpsw: use same macros to get active slave
  net: mvneta: select GENERIC_ALLOCATOR
  ...

1 files changed, 81 insertions, 24 deletions

diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 22087062bd10..08aa926cd5cf 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -334,14 +334,17 @@ static int parse_vlan_tag(struct sk_buff *skb, struct vlan_head *key_vh)
 	return 1;
 }
 
-static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+static void clear_vlan(struct sw_flow_key *key)
 {
-	int res;
-
 	key->eth.vlan.tci = 0;
 	key->eth.vlan.tpid = 0;
 	key->eth.cvlan.tci = 0;
 	key->eth.cvlan.tpid = 0;
+}
+
+static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+{
+	int res;
 
 	if (skb_vlan_tag_present(skb)) {
 		key->eth.vlan.tci = htons(skb->vlan_tci);
@@ -483,17 +486,20 @@ invalid:
  *
  * Returns 0 if successful, otherwise a negative errno value.
  *
- * Initializes @skb header pointers as follows:
+ * Initializes @skb header fields as follows:
  *
- *    - skb->mac_header: the Ethernet header.
+ *    - skb->mac_header: the L2 header.
  *
- *    - skb->network_header: just past the Ethernet header, or just past the
- *      VLAN header, to the first byte of the Ethernet payload.
+ *    - skb->network_header: just past the L2 header, or just past the
+ *      VLAN header, to the first byte of the L2 payload.
  *
  *    - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
  *      on output, then just past the IP header, if one is present and
  *      of a correct length, otherwise the same as skb->network_header.
  *      For other key->eth.type values it is left untouched.
+ *
+ *    - skb->protocol: the type of the data starting at skb->network_header.
+ *      Equals to key->eth.type.
  */
 static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
 {
@@ -505,28 +511,35 @@ static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
 
 	skb_reset_mac_header(skb);
 
-	/* Link layer.  We are guaranteed to have at least the 14 byte Ethernet
-	 * header in the linear data area.
-	 */
-	eth = eth_hdr(skb);
-	ether_addr_copy(key->eth.src, eth->h_source);
-	ether_addr_copy(key->eth.dst, eth->h_dest);
+	/* Link layer. */
+	clear_vlan(key);
+	if (key->mac_proto == MAC_PROTO_NONE) {
+		if (unlikely(eth_type_vlan(skb->protocol)))
+			return -EINVAL;
 
-	__skb_pull(skb, 2 * ETH_ALEN);
-	/* We are going to push all headers that we pull, so no need to
-	 * update skb->csum here.
-	 */
+		skb_reset_network_header(skb);
+	} else {
+		eth = eth_hdr(skb);
+		ether_addr_copy(key->eth.src, eth->h_source);
+		ether_addr_copy(key->eth.dst, eth->h_dest);
 
-	if (unlikely(parse_vlan(skb, key)))
-		return -ENOMEM;
+		__skb_pull(skb, 2 * ETH_ALEN);
+		/* We are going to push all headers that we pull, so no need to
+		* update skb->csum here.
+		*/
 
-	key->eth.type = parse_ethertype(skb);
-	if (unlikely(key->eth.type == htons(0)))
-		return -ENOMEM;
+		if (unlikely(parse_vlan(skb, key)))
+			return -ENOMEM;
+
+		skb->protocol = parse_ethertype(skb);
+		if (unlikely(skb->protocol == htons(0)))
+			return -ENOMEM;
 
-	skb_reset_network_header(skb);
+		skb_reset_network_header(skb);
+		__skb_push(skb, skb->data - skb_mac_header(skb));
+	}
 	skb_reset_mac_len(skb);
-	__skb_push(skb, skb->data - skb_mac_header(skb));
+	key->eth.type = skb->protocol;
 
 	/* Network layer. */
 	if (key->eth.type == htons(ETH_P_IP)) {
@@ -721,9 +734,25 @@ int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key)
 	return key_extract(skb, key);
 }
 
+static int key_extract_mac_proto(struct sk_buff *skb)
+{
+	switch (skb->dev->type) {
+	case ARPHRD_ETHER:
+		return MAC_PROTO_ETHERNET;
+	case ARPHRD_NONE:
+		if (skb->protocol == htons(ETH_P_TEB))
+			return MAC_PROTO_ETHERNET;
+		return MAC_PROTO_NONE;
+	}
+	WARN_ON_ONCE(1);
+	return -EINVAL;
+}
+
 int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info,
 			 struct sk_buff *skb, struct sw_flow_key *key)
 {
+	int res;
+
 	/* Extract metadata from packet. */
 	if (tun_info) {
 		key->tun_proto = ip_tunnel_info_af(tun_info);
@@ -751,6 +780,10 @@ int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info,
 	key->phy.skb_mark = skb->mark;
 	ovs_ct_fill_key(skb, key);
 	key->ovs_flow_hash = 0;
+	res = key_extract_mac_proto(skb);
+	if (res < 0)
+		return res;
+	key->mac_proto = res;
 	key->recirc_id = 0;
 
 	return key_extract(skb, key);
@@ -767,5 +800,29 @@ int ovs_flow_key_extract_userspace(struct net *net, const struct nlattr *attr,
 	if (err)
 		return err;
 
+	if (ovs_key_mac_proto(key) == MAC_PROTO_NONE) {
+		/* key_extract assumes that skb->protocol is set-up for
+		 * layer 3 packets which is the case for other callers,
+		 * in particular packets recieved from the network stack.
+		 * Here the correct value can be set from the metadata
+		 * extracted above.
+		 */
+		skb->protocol = key->eth.type;
+	} else {
+		struct ethhdr *eth;
+
+		skb_reset_mac_header(skb);
+		eth = eth_hdr(skb);
+
+		/* Normally, setting the skb 'protocol' field would be
+		 * handled by a call to eth_type_trans(), but it assumes
+		 * there's a sending device, which we may not have.
+		 */
+		if (eth_proto_is_802_3(eth->h_proto))
+			skb->protocol = eth->h_proto;
+		else
+			skb->protocol = htons(ETH_P_802_2);
+	}
+
 	return key_extract(skb, key);
 }