1 files changed, 233 insertions, 73 deletions

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index c3e3d2929ee3..33427fd62515 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -81,13 +81,22 @@ struct vxlan_net {
 	struct hlist_head vni_list[VNI_HASH_SIZE];
 };
 
+struct vxlan_rdst {
+	struct rcu_head		 rcu;
+	__be32			 remote_ip;
+	__be16			 remote_port;
+	u32			 remote_vni;
+	u32			 remote_ifindex;
+	struct vxlan_rdst	*remote_next;
+};
+
 /* Forwarding table entry */
 struct vxlan_fdb {
 	struct hlist_node hlist;	/* linked list of entries */
 	struct rcu_head	  rcu;
 	unsigned long	  updated;	/* jiffies */
 	unsigned long	  used;
-	__be32		  remote_ip;
+	struct vxlan_rdst remote;
 	u16		  state;	/* see ndm_state */
 	u8		  eth_addr[ETH_ALEN];
 };
@@ -157,7 +166,8 @@ static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id)
 /* Fill in neighbour message in skbuff. */
 static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
 			   const struct vxlan_fdb *fdb,
-			   u32 portid, u32 seq, int type, unsigned int flags)
+			   u32 portid, u32 seq, int type, unsigned int flags,
+			   const struct vxlan_rdst *rdst)
 {
 	unsigned long now = jiffies;
 	struct nda_cacheinfo ci;
@@ -176,7 +186,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
 
 	if (type == RTM_GETNEIGH) {
 		ndm->ndm_family	= AF_INET;
-		send_ip = fdb->remote_ip != 0;
+		send_ip = rdst->remote_ip != htonl(INADDR_ANY);
 		send_eth = !is_zero_ether_addr(fdb->eth_addr);
 	} else
 		ndm->ndm_family	= AF_BRIDGE;
@@ -188,7 +198,17 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
 	if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
 		goto nla_put_failure;
 
-	if (send_ip && nla_put_be32(skb, NDA_DST, fdb->remote_ip))
+	if (send_ip && nla_put_be32(skb, NDA_DST, rdst->remote_ip))
+		goto nla_put_failure;
+
+	if (rdst->remote_port && rdst->remote_port != vxlan_port &&
+	    nla_put_be16(skb, NDA_PORT, rdst->remote_port))
+		goto nla_put_failure;
+	if (rdst->remote_vni != vxlan->vni &&
+	    nla_put_be32(skb, NDA_VNI, rdst->remote_vni))
+		goto nla_put_failure;
+	if (rdst->remote_ifindex &&
+	    nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
 		goto nla_put_failure;
 
 	ci.ndm_used	 = jiffies_to_clock_t(now - fdb->used);
@@ -211,6 +231,9 @@ static inline size_t vxlan_nlmsg_size(void)
 	return NLMSG_ALIGN(sizeof(struct ndmsg))
 		+ nla_total_size(ETH_ALEN) /* NDA_LLADDR */
 		+ nla_total_size(sizeof(__be32)) /* NDA_DST */
+		+ nla_total_size(sizeof(__be32)) /* NDA_PORT */
+		+ nla_total_size(sizeof(__be32)) /* NDA_VNI */
+		+ nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
 		+ nla_total_size(sizeof(struct nda_cacheinfo));
 }
 
@@ -225,7 +248,7 @@ static void vxlan_fdb_notify(struct vxlan_dev *vxlan,
 	if (skb == NULL)
 		goto errout;
 
-	err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0);
+	err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, &fdb->remote);
 	if (err < 0) {
 		/* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
 		WARN_ON(err == -EMSGSIZE);
@@ -247,7 +270,8 @@ static void vxlan_ip_miss(struct net_device *dev, __be32 ipa)
 
 	memset(&f, 0, sizeof f);
 	f.state = NUD_STALE;
-	f.remote_ip = ipa; /* goes to NDA_DST */
+	f.remote.remote_ip = ipa; /* goes to NDA_DST */
+	f.remote.remote_vni = VXLAN_N_VID;
 
 	vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH);
 }
@@ -300,10 +324,38 @@ static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
 	return NULL;
 }
 
+/* Add/update destinations for multicast */
+static int vxlan_fdb_append(struct vxlan_fdb *f,
+			    __be32 ip, __u32 port, __u32 vni, __u32 ifindex)
+{
+	struct vxlan_rdst *rd_prev, *rd;
+
+	rd_prev = NULL;
+	for (rd = &f->remote; rd; rd = rd->remote_next) {
+		if (rd->remote_ip == ip &&
+		    rd->remote_port == port &&
+		    rd->remote_vni == vni &&
+		    rd->remote_ifindex == ifindex)
+			return 0;
+		rd_prev = rd;
+	}
+	rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
+	if (rd == NULL)
+		return -ENOBUFS;
+	rd->remote_ip = ip;
+	rd->remote_port = port;
+	rd->remote_vni = vni;
+	rd->remote_ifindex = ifindex;
+	rd->remote_next = NULL;
+	rd_prev->remote_next = rd;
+	return 1;
+}
+
 /* Add new entry to forwarding table -- assumes lock held */
 static int vxlan_fdb_create(struct vxlan_dev *vxlan,
 			    const u8 *mac, __be32 ip,
-			    __u16 state, __u16 flags)
+			    __u16 state, __u16 flags,
+			    __u32 port, __u32 vni, __u32 ifindex)
 {
 	struct vxlan_fdb *f;
 	int notify = 0;
@@ -320,6 +372,14 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
 			f->updated = jiffies;
 			notify = 1;
 		}
+		if ((flags & NLM_F_APPEND) &&
+		    is_multicast_ether_addr(f->eth_addr)) {
+			int rc = vxlan_fdb_append(f, ip, port, vni, ifindex);
+
+			if (rc < 0)
+				return rc;
+			notify |= rc;
+		}
 	} else {
 		if (!(flags & NLM_F_CREATE))
 			return -ENOENT;
@@ -333,7 +393,11 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
 			return -ENOMEM;
 
 		notify = 1;
-		f->remote_ip = ip;
+		f->remote.remote_ip = ip;
+		f->remote.remote_port = port;
+		f->remote.remote_vni = vni;
+		f->remote.remote_ifindex = ifindex;
+		f->remote.remote_next = NULL;
 		f->state = state;
 		f->updated = f->used = jiffies;
 		memcpy(f->eth_addr, mac, ETH_ALEN);
@@ -349,6 +413,19 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
 	return 0;
 }
 
+void vxlan_fdb_free(struct rcu_head *head)
+{
+	struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
+
+	while (f->remote.remote_next) {
+		struct vxlan_rdst *rd = f->remote.remote_next;
+
+		f->remote.remote_next = rd->remote_next;
+		kfree(rd);
+	}
+	kfree(f);
+}
+
 static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
 {
 	netdev_dbg(vxlan->dev,
@@ -358,7 +435,7 @@ static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
 	vxlan_fdb_notify(vxlan, f, RTM_DELNEIGH);
 
 	hlist_del_rcu(&f->hlist);
-	kfree_rcu(f, rcu);
+	call_rcu(&f->rcu, vxlan_fdb_free);
 }
 
 /* Add static entry (via netlink) */
@@ -367,7 +444,9 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 			 const unsigned char *addr, u16 flags)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
+	struct net *net = dev_net(vxlan->dev);
 	__be32 ip;
+	u32 port, vni, ifindex;
 	int err;
 
 	if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
@@ -384,8 +463,36 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 
 	ip = nla_get_be32(tb[NDA_DST]);
 
+	if (tb[NDA_PORT]) {
+		if (nla_len(tb[NDA_PORT]) != sizeof(u32))
+			return -EINVAL;
+		port = nla_get_u32(tb[NDA_PORT]);
+	} else
+		port = vxlan_port;
+
+	if (tb[NDA_VNI]) {
+		if (nla_len(tb[NDA_VNI]) != sizeof(u32))
+			return -EINVAL;
+		vni = nla_get_u32(tb[NDA_VNI]);
+	} else
+		vni = vxlan->vni;
+
+	if (tb[NDA_IFINDEX]) {
+		struct net_device *dev;
+
+		if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
+			return -EINVAL;
+		ifindex = nla_get_u32(tb[NDA_IFINDEX]);
+		dev = dev_get_by_index(net, ifindex);
+		if (!dev)
+			return -EADDRNOTAVAIL;
+		dev_put(dev);
+	} else
+		ifindex = 0;
+
 	spin_lock_bh(&vxlan->hash_lock);
-	err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags);
+	err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags, port,
+		vni, ifindex);
 	spin_unlock_bh(&vxlan->hash_lock);
 
 	return err;
@@ -423,18 +530,21 @@ static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 		int err;
 
 		hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
-			if (idx < cb->args[0])
-				goto skip;
-
-			err = vxlan_fdb_info(skb, vxlan, f,
-					     NETLINK_CB(cb->skb).portid,
-					     cb->nlh->nlmsg_seq,
-					     RTM_NEWNEIGH,
-					     NLM_F_MULTI);
-			if (err < 0)
-				break;
+			struct vxlan_rdst *rd;
+			for (rd = &f->remote; rd; rd = rd->remote_next) {
+				if (idx < cb->args[0])
+					goto skip;
+
+				err = vxlan_fdb_info(skb, vxlan, f,
+						     NETLINK_CB(cb->skb).portid,
+						     cb->nlh->nlmsg_seq,
+						     RTM_NEWNEIGH,
+						     NLM_F_MULTI, rd);
+				if (err < 0)
+					break;
 skip:
-			++idx;
+				++idx;
+			}
 		}
 	}
 
@@ -454,22 +564,23 @@ static void vxlan_snoop(struct net_device *dev,
 	f = vxlan_find_mac(vxlan, src_mac);
 	if (likely(f)) {
 		f->used = jiffies;
-		if (likely(f->remote_ip == src_ip))
+		if (likely(f->remote.remote_ip == src_ip))
 			return;
 
 		if (net_ratelimit())
 			netdev_info(dev,
 				    "%pM migrated from %pI4 to %pI4\n",
-				    src_mac, &f->remote_ip, &src_ip);
+				    src_mac, &f->remote.remote_ip, &src_ip);
 
-		f->remote_ip = src_ip;
+		f->remote.remote_ip = src_ip;
 		f->updated = jiffies;
 	} else {
 		/* learned new entry */
 		spin_lock(&vxlan->hash_lock);
 		err = vxlan_fdb_create(vxlan, src_mac, src_ip,
 				       NUD_REACHABLE,
-				       NLM_F_EXCL|NLM_F_CREATE);
+				       NLM_F_EXCL|NLM_F_CREATE,
+				       vxlan_port, vxlan->vni, 0);
 		spin_unlock(&vxlan->hash_lock);
 	}
 }
@@ -701,7 +812,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
 		}
 
 		f = vxlan_find_mac(vxlan, n->ha);
-		if (f && f->remote_ip == 0) {
+		if (f && f->remote.remote_ip == htonl(INADDR_ANY)) {
 			/* bridge-local neighbor */
 			neigh_release(n);
 			goto out;
@@ -820,48 +931,40 @@ static u16 vxlan_src_port(const struct vxlan_dev *vxlan, struct sk_buff *skb)
 	return (((u64) hash * range) >> 32) + vxlan->port_min;
 }
 
-/* Transmit local packets over Vxlan
- *
- * Outer IP header inherits ECN and DF from inner header.
- * Outer UDP destination is the VXLAN assigned port.
- *           source port is based on hash of flow
- */
-static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
+static int handle_offloads(struct sk_buff *skb)
+{
+	if (skb_is_gso(skb)) {
+		int err = skb_unclone(skb, GFP_ATOMIC);
+		if (unlikely(err))
+			return err;
+
+		skb_shinfo(skb)->gso_type |= (SKB_GSO_UDP_TUNNEL | SKB_GSO_UDP);
+	} else if (skb->ip_summed != CHECKSUM_PARTIAL)
+		skb->ip_summed = CHECKSUM_NONE;
+
+	return 0;
+}
+
+static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
+				  struct vxlan_rdst *rdst, bool did_rsc)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	struct rtable *rt;
 	const struct iphdr *old_iph;
-	struct ethhdr *eth;
 	struct iphdr *iph;
 	struct vxlanhdr *vxh;
 	struct udphdr *uh;
 	struct flowi4 fl4;
 	unsigned int pkt_len = skb->len;
 	__be32 dst;
-	__u16 src_port;
+	__u16 src_port, dst_port;
+        u32 vni;
 	__be16 df = 0;
 	__u8 tos, ttl;
-	int err;
-	bool did_rsc = false;
-	const struct vxlan_fdb *f;
-
-	skb_reset_mac_header(skb);
-	eth = eth_hdr(skb);
-
-	if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP)
-		return arp_reduce(dev, skb);
-	else if ((vxlan->flags&VXLAN_F_RSC) && ntohs(eth->h_proto) == ETH_P_IP)
-		did_rsc = route_shortcircuit(dev, skb);
 
-	f = vxlan_find_mac(vxlan, eth->h_dest);
-	if (f == NULL) {
-		did_rsc = false;
-		dst = vxlan->gaddr;
-		if (!dst && (vxlan->flags & VXLAN_F_L2MISS) &&
-		    !is_multicast_ether_addr(eth->h_dest))
-			vxlan_fdb_miss(vxlan, eth->h_dest);
-	} else
-		dst = f->remote_ip;
+	dst_port = rdst->remote_port ? rdst->remote_port : vxlan_port;
+	vni = rdst->remote_vni;
+	dst = rdst->remote_ip;
 
 	if (!dst) {
 		if (did_rsc) {
@@ -909,7 +1012,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 	src_port = vxlan_src_port(vxlan, skb);
 
 	memset(&fl4, 0, sizeof(fl4));
-	fl4.flowi4_oif = vxlan->link;
+	fl4.flowi4_oif = rdst->remote_ifindex;
 	fl4.flowi4_tos = RT_TOS(tos);
 	fl4.daddr = dst;
 	fl4.saddr = vxlan->saddr;
@@ -936,13 +1039,13 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
 	vxh->vx_flags = htonl(VXLAN_FLAGS);
-	vxh->vx_vni = htonl(vxlan->vni << 8);
+	vxh->vx_vni = htonl(vni << 8);
 
 	__skb_push(skb, sizeof(*uh));
 	skb_reset_transport_header(skb);
 	uh = udp_hdr(skb);
 
-	uh->dest = htons(vxlan_port);
+	uh->dest = htons(dst_port);
 	uh->source = htons(src_port);
 
 	uh->len = htons(skb->len);
@@ -965,22 +1068,10 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	vxlan_set_owner(dev, skb);
 
-	/* See iptunnel_xmit() */
-	if (skb->ip_summed != CHECKSUM_PARTIAL)
-		skb->ip_summed = CHECKSUM_NONE;
-
-	err = ip_local_out(skb);
-	if (likely(net_xmit_eval(err) == 0)) {
-		struct vxlan_stats *stats = this_cpu_ptr(vxlan->stats);
+	if (handle_offloads(skb))
+		goto drop;
 
-		u64_stats_update_begin(&stats->syncp);
-		stats->tx_packets++;
-		stats->tx_bytes += pkt_len;
-		u64_stats_update_end(&stats->syncp);
-	} else {
-		dev->stats.tx_errors++;
-		dev->stats.tx_aborted_errors++;
-	}
+	iptunnel_xmit(skb, dev);
 	return NETDEV_TX_OK;
 
 drop:
@@ -994,6 +1085,64 @@ tx_free:
 	return NETDEV_TX_OK;
 }
 
+/* Transmit local packets over Vxlan
+ *
+ * Outer IP header inherits ECN and DF from inner header.
+ * Outer UDP destination is the VXLAN assigned port.
+ *           source port is based on hash of flow
+ */
+static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct vxlan_dev *vxlan = netdev_priv(dev);
+	struct ethhdr *eth;
+	bool did_rsc = false;
+	struct vxlan_rdst group, *rdst0, *rdst;
+	struct vxlan_fdb *f;
+	int rc1, rc;
+
+	skb_reset_mac_header(skb);
+	eth = eth_hdr(skb);
+
+	if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP)
+		return arp_reduce(dev, skb);
+	else if ((vxlan->flags&VXLAN_F_RSC) && ntohs(eth->h_proto) == ETH_P_IP)
+		did_rsc = route_shortcircuit(dev, skb);
+
+	f = vxlan_find_mac(vxlan, eth->h_dest);
+	if (f == NULL) {
+		did_rsc = false;
+		group.remote_port = vxlan_port;
+		group.remote_vni = vxlan->vni;
+		group.remote_ip = vxlan->gaddr;
+		group.remote_ifindex = vxlan->link;
+		group.remote_next = 0;
+		rdst0 = &group;
+
+		if (group.remote_ip == htonl(INADDR_ANY) &&
+		    (vxlan->flags & VXLAN_F_L2MISS) &&
+		    !is_multicast_ether_addr(eth->h_dest))
+			vxlan_fdb_miss(vxlan, eth->h_dest);
+	} else
+		rdst0 = &f->remote;
+
+	rc = NETDEV_TX_OK;
+
+	/* if there are multiple destinations, send copies */
+	for (rdst = rdst0->remote_next; rdst; rdst = rdst->remote_next) {
+		struct sk_buff *skb1;
+
+		skb1 = skb_clone(skb, GFP_ATOMIC);
+		rc1 = vxlan_xmit_one(skb1, dev, rdst, did_rsc);
+		if (rc == NETDEV_TX_OK)
+			rc = rc1;
+	}
+
+	rc1 = vxlan_xmit_one(skb, dev, rdst0, did_rsc);
+	if (rc == NETDEV_TX_OK)
+		rc = rc1;
+	return rc;
+}
+
 /* Walk the forwarding table and purge stale entries */
 static void vxlan_cleanup(unsigned long arg)
 {
@@ -1189,8 +1338,10 @@ static void vxlan_setup(struct net_device *dev)
 	dev->features	|= NETIF_F_NETNS_LOCAL;
 	dev->features	|= NETIF_F_SG | NETIF_F_HW_CSUM;
 	dev->features   |= NETIF_F_RXCSUM;
+	dev->features   |= NETIF_F_GSO_SOFTWARE;
 
 	dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
+	dev->hw_features |= NETIF_F_GSO_SOFTWARE;
 	dev->priv_flags	&= ~IFF_XMIT_DST_RELEASE;
 	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
 
@@ -1506,6 +1657,14 @@ static __net_init int vxlan_init_net(struct net *net)
 static __net_exit void vxlan_exit_net(struct net *net)
 {
 	struct vxlan_net *vn = net_generic(net, vxlan_net_id);
+	struct vxlan_dev *vxlan;
+	unsigned h;
+
+	rtnl_lock();
+	for (h = 0; h < VNI_HASH_SIZE; ++h)
+		hlist_for_each_entry(vxlan, &vn->vni_list[h], hlist)
+			dev_close(vxlan->dev);
+	rtnl_unlock();
 
 	if (vn->sock) {
 		sk_release_kernel(vn->sock->sk);
@@ -1547,6 +1706,7 @@ static void __exit vxlan_cleanup_module(void)
 {
 	rtnl_link_unregister(&vxlan_link_ops);
 	unregister_pernet_device(&vxlan_net_ops);
+	rcu_barrier();
 }
 module_exit(vxlan_cleanup_module);