1 files changed, 153 insertions, 69 deletions

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 78744549c1b3..e463f59e95c2 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -623,6 +623,32 @@ static int vxlan_fdb_append(struct vxlan_fdb *f,
 	return 1;
 }
 
+static bool vxlan_parse_gpe_proto(struct vxlanhdr *hdr, __be16 *protocol)
+{
+	struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)hdr;
+
+	/* Need to have Next Protocol set for interfaces in GPE mode. */
+	if (!gpe->np_applied)
+		return false;
+	/* "The initial version is 0. If a receiver does not support the
+	 * version indicated it MUST drop the packet.
+	 */
+	if (gpe->version != 0)
+		return false;
+	/* "When the O bit is set to 1, the packet is an OAM packet and OAM
+	 * processing MUST occur." However, we don't implement OAM
+	 * processing, thus drop the packet.
+	 */
+	if (gpe->oam_flag)
+		return false;
+
+	*protocol = tun_p_to_eth_p(gpe->next_protocol);
+	if (!*protocol)
+		return false;
+
+	return true;
+}
+
 static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
 					  unsigned int off,
 					  struct vxlanhdr *vh, size_t hdrlen,
@@ -649,26 +675,24 @@ static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
 	return vh;
 }
 
-static struct sk_buff *vxlan_gro_receive(struct sock *sk,
-					 struct list_head *head,
-					 struct sk_buff *skb)
+static struct vxlanhdr *vxlan_gro_prepare_receive(struct sock *sk,
+						  struct list_head *head,
+						  struct sk_buff *skb,
+						  struct gro_remcsum *grc)
 {
-	struct sk_buff *pp = NULL;
 	struct sk_buff *p;
 	struct vxlanhdr *vh, *vh2;
 	unsigned int hlen, off_vx;
-	int flush = 1;
 	struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk);
 	__be32 flags;
-	struct gro_remcsum grc;
 
-	skb_gro_remcsum_init(&grc);
+	skb_gro_remcsum_init(grc);
 
 	off_vx = skb_gro_offset(skb);
 	hlen = off_vx + sizeof(*vh);
 	vh = skb_gro_header(skb, hlen, off_vx);
 	if (unlikely(!vh))
-		goto out;
+		return NULL;
 
 	skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
 
@@ -676,12 +700,12 @@ static struct sk_buff *vxlan_gro_receive(struct sock *sk,
 
 	if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
 		vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
-				       vh->vx_vni, &grc,
+				       vh->vx_vni, grc,
 				       !!(vs->flags &
 					  VXLAN_F_REMCSUM_NOPARTIAL));
 
 		if (!vh)
-			goto out;
+			return NULL;
 	}
 
 	skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
@@ -698,12 +722,48 @@ static struct sk_buff *vxlan_gro_receive(struct sock *sk,
 		}
 	}
 
-	pp = call_gro_receive(eth_gro_receive, head, skb);
-	flush = 0;
+	return vh;
+}
 
-out:
+static struct sk_buff *vxlan_gro_receive(struct sock *sk,
+					 struct list_head *head,
+					 struct sk_buff *skb)
+{
+	struct sk_buff *pp = NULL;
+	struct gro_remcsum grc;
+	int flush = 1;
+
+	if (vxlan_gro_prepare_receive(sk, head, skb, &grc)) {
+		pp = call_gro_receive(eth_gro_receive, head, skb);
+		flush = 0;
+	}
 	skb_gro_flush_final_remcsum(skb, pp, flush, &grc);
+	return pp;
+}
 
+static struct sk_buff *vxlan_gpe_gro_receive(struct sock *sk,
+					     struct list_head *head,
+					     struct sk_buff *skb)
+{
+	const struct packet_offload *ptype;
+	struct sk_buff *pp = NULL;
+	struct gro_remcsum grc;
+	struct vxlanhdr *vh;
+	__be16 protocol;
+	int flush = 1;
+
+	vh = vxlan_gro_prepare_receive(sk, head, skb, &grc);
+	if (vh) {
+		if (!vxlan_parse_gpe_proto(vh, &protocol))
+			goto out;
+		ptype = gro_find_receive_by_type(protocol);
+		if (!ptype)
+			goto out;
+		pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
+		flush = 0;
+	}
+out:
+	skb_gro_flush_final_remcsum(skb, pp, flush, &grc);
 	return pp;
 }
 
@@ -715,6 +775,21 @@ static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
 	return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
 }
 
+static int vxlan_gpe_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
+{
+	struct vxlanhdr *vh = (struct vxlanhdr *)(skb->data + nhoff);
+	const struct packet_offload *ptype;
+	int err = -ENOSYS;
+	__be16 protocol;
+
+	if (!vxlan_parse_gpe_proto(vh, &protocol))
+		return err;
+	ptype = gro_find_complete_by_type(protocol);
+	if (ptype)
+		err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
+	return err;
+}
+
 static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan, const u8 *mac,
 					 __u16 state, __be32 src_vni,
 					 __u16 ndm_flags)
@@ -1525,35 +1600,6 @@ out:
 	unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
 }
 
-static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
-				__be16 *protocol,
-				struct sk_buff *skb, u32 vxflags)
-{
-	struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
-
-	/* Need to have Next Protocol set for interfaces in GPE mode. */
-	if (!gpe->np_applied)
-		return false;
-	/* "The initial version is 0. If a receiver does not support the
-	 * version indicated it MUST drop the packet.
-	 */
-	if (gpe->version != 0)
-		return false;
-	/* "When the O bit is set to 1, the packet is an OAM packet and OAM
-	 * processing MUST occur." However, we don't implement OAM
-	 * processing, thus drop the packet.
-	 */
-	if (gpe->oam_flag)
-		return false;
-
-	*protocol = tun_p_to_eth_p(gpe->next_protocol);
-	if (!*protocol)
-		return false;
-
-	unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
-	return true;
-}
-
 static bool vxlan_set_mac(struct vxlan_dev *vxlan,
 			  struct vxlan_sock *vs,
 			  struct sk_buff *skb, __be32 vni)
@@ -1655,8 +1701,9 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 	 * used by VXLAN extensions if explicitly requested.
 	 */
 	if (vs->flags & VXLAN_F_GPE) {
-		if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
+		if (!vxlan_parse_gpe_proto(&unparsed, &protocol))
 			goto drop;
+		unparsed.vx_flags &= ~VXLAN_GPE_USED_BITS;
 		raw_proto = true;
 	}
 
@@ -2281,14 +2328,11 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
 			       struct vxlan_dev *dst_vxlan, __be32 vni,
 			       bool snoop)
 {
-	struct pcpu_sw_netstats *tx_stats, *rx_stats;
 	union vxlan_addr loopback;
 	union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
 	struct net_device *dev;
 	int len = skb->len;
 
-	tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
-	rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
 	skb->pkt_type = PACKET_HOST;
 	skb->encapsulation = 0;
 	skb->dev = dst_vxlan->dev;
@@ -2314,17 +2358,11 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
 	if ((dst_vxlan->cfg.flags & VXLAN_F_LEARN) && snoop)
 		vxlan_snoop(dev, &loopback, eth_hdr(skb)->h_source, 0, vni);
 
-	u64_stats_update_begin(&tx_stats->syncp);
-	u64_stats_inc(&tx_stats->tx_packets);
-	u64_stats_add(&tx_stats->tx_bytes, len);
-	u64_stats_update_end(&tx_stats->syncp);
+	dev_sw_netstats_tx_add(src_vxlan->dev, 1, len);
 	vxlan_vnifilter_count(src_vxlan, vni, NULL, VXLAN_VNI_STATS_TX, len);
 
 	if (__netif_rx(skb) == NET_RX_SUCCESS) {
-		u64_stats_update_begin(&rx_stats->syncp);
-		u64_stats_inc(&rx_stats->rx_packets);
-		u64_stats_add(&rx_stats->rx_bytes, len);
-		u64_stats_update_end(&rx_stats->syncp);
+		dev_sw_netstats_rx_add(dst_vxlan->dev, len);
 		vxlan_vnifilter_count(dst_vxlan, vni, NULL, VXLAN_VNI_STATS_RX,
 				      len);
 	} else {
@@ -2516,7 +2554,7 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 		}
 
 		ndst = &rt->dst;
-		err = skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM,
+		err = skb_tunnel_check_pmtu(skb, ndst, vxlan_headroom(flags & VXLAN_F_GPE),
 					    netif_is_any_bridge_port(dev));
 		if (err < 0) {
 			goto tx_error;
@@ -2577,7 +2615,8 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 				goto out_unlock;
 		}
 
-		err = skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM,
+		err = skb_tunnel_check_pmtu(skb, ndst,
+					    vxlan_headroom((flags & VXLAN_F_GPE) | VXLAN_F_IPV6),
 					    netif_is_any_bridge_port(dev));
 		if (err < 0) {
 			goto tx_error;
@@ -2672,6 +2711,45 @@ drop:
 	dev_kfree_skb(skb);
 }
 
+static netdev_tx_t vxlan_xmit_nhid(struct sk_buff *skb, struct net_device *dev,
+				   u32 nhid, __be32 vni)
+{
+	struct vxlan_dev *vxlan = netdev_priv(dev);
+	struct vxlan_rdst nh_rdst;
+	struct nexthop *nh;
+	bool do_xmit;
+	u32 hash;
+
+	memset(&nh_rdst, 0, sizeof(struct vxlan_rdst));
+	hash = skb_get_hash(skb);
+
+	rcu_read_lock();
+	nh = nexthop_find_by_id(dev_net(dev), nhid);
+	if (unlikely(!nh || !nexthop_is_fdb(nh) || !nexthop_is_multipath(nh))) {
+		rcu_read_unlock();
+		goto drop;
+	}
+	do_xmit = vxlan_fdb_nh_path_select(nh, hash, &nh_rdst);
+	rcu_read_unlock();
+
+	if (vxlan->cfg.saddr.sa.sa_family != nh_rdst.remote_ip.sa.sa_family)
+		goto drop;
+
+	if (likely(do_xmit))
+		vxlan_xmit_one(skb, dev, vni, &nh_rdst, false);
+	else
+		goto drop;
+
+	return NETDEV_TX_OK;
+
+drop:
+	dev->stats.tx_dropped++;
+	vxlan_vnifilter_count(netdev_priv(dev), vni, NULL,
+			      VXLAN_VNI_STATS_TX_DROPS, 0);
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
+
 /* Transmit local packets over Vxlan
  *
  * Outer IP header inherits ECN and DF from inner header.
@@ -2687,6 +2765,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct vxlan_fdb *f;
 	struct ethhdr *eth;
 	__be32 vni = 0;
+	u32 nhid = 0;
 
 	info = skb_tunnel_info(skb);
 
@@ -2696,6 +2775,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 		if (info && info->mode & IP_TUNNEL_INFO_BRIDGE &&
 		    info->mode & IP_TUNNEL_INFO_TX) {
 			vni = tunnel_id_to_key32(info->key.tun_id);
+			nhid = info->key.nhid;
 		} else {
 			if (info && info->mode & IP_TUNNEL_INFO_TX)
 				vxlan_xmit_one(skb, dev, vni, NULL, false);
@@ -2723,6 +2803,9 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 #endif
 	}
 
+	if (nhid)
+		return vxlan_xmit_nhid(skb, dev, nhid, vni);
+
 	if (vxlan->cfg.flags & VXLAN_F_MDB) {
 		struct vxlan_mdb_entry *mdb_entry;
 
@@ -2989,14 +3072,12 @@ static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
 	struct vxlan_rdst *dst = &vxlan->default_dst;
 	struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
 							 dst->remote_ifindex);
-	bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6);
 
 	/* This check is different than dev->max_mtu, because it looks at
 	 * the lowerdev->mtu, rather than the static dev->max_mtu
 	 */
 	if (lowerdev) {
-		int max_mtu = lowerdev->mtu -
-			      (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
+		int max_mtu = lowerdev->mtu - vxlan_headroom(vxlan->cfg.flags);
 		if (new_mtu > max_mtu)
 			return -EINVAL;
 	}
@@ -3379,8 +3460,13 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
 	tunnel_cfg.encap_rcv = vxlan_rcv;
 	tunnel_cfg.encap_err_lookup = vxlan_err_lookup;
 	tunnel_cfg.encap_destroy = NULL;
-	tunnel_cfg.gro_receive = vxlan_gro_receive;
-	tunnel_cfg.gro_complete = vxlan_gro_complete;
+	if (vs->flags & VXLAN_F_GPE) {
+		tunnel_cfg.gro_receive = vxlan_gpe_gro_receive;
+		tunnel_cfg.gro_complete = vxlan_gpe_gro_complete;
+	} else {
+		tunnel_cfg.gro_receive = vxlan_gro_receive;
+		tunnel_cfg.gro_complete = vxlan_gro_complete;
+	}
 
 	setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
 
@@ -3644,11 +3730,11 @@ static void vxlan_config_apply(struct net_device *dev,
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	struct vxlan_rdst *dst = &vxlan->default_dst;
 	unsigned short needed_headroom = ETH_HLEN;
-	bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6);
 	int max_mtu = ETH_MAX_MTU;
+	u32 flags = conf->flags;
 
 	if (!changelink) {
-		if (conf->flags & VXLAN_F_GPE)
+		if (flags & VXLAN_F_GPE)
 			vxlan_raw_setup(dev);
 		else
 			vxlan_ether_setup(dev);
@@ -3673,8 +3759,7 @@ static void vxlan_config_apply(struct net_device *dev,
 
 		dev->needed_tailroom = lowerdev->needed_tailroom;
 
-		max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM :
-					   VXLAN_HEADROOM);
+		max_mtu = lowerdev->mtu - vxlan_headroom(flags);
 		if (max_mtu < ETH_MIN_MTU)
 			max_mtu = ETH_MIN_MTU;
 
@@ -3685,10 +3770,9 @@ static void vxlan_config_apply(struct net_device *dev,
 	if (dev->mtu > max_mtu)
 		dev->mtu = max_mtu;
 
-	if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
-		needed_headroom += VXLAN6_HEADROOM;
-	else
-		needed_headroom += VXLAN_HEADROOM;
+	if (flags & VXLAN_F_COLLECT_METADATA)
+		flags |= VXLAN_F_IPV6;
+	needed_headroom += vxlan_headroom(flags);
 	dev->needed_headroom = needed_headroom;
 
 	memcpy(&vxlan->cfg, conf, sizeof(*conf));