1 files changed, 69 insertions, 38 deletions

diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 0ea128eeeab2..634cc10d6dee 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -29,6 +29,7 @@
 #include <linux/module.h>
 #include <linux/in.h>
 #include <linux/rcupdate.h>
+#include <linux/cpumask.h>
 #include <linux/if_arp.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
@@ -72,32 +73,33 @@ void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags,
 {
 	struct flow_stats *stats;
 	int node = numa_node_id();
+	int cpu = smp_processor_id();
 	int len = skb->len + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
 
-	stats = rcu_dereference(flow->stats[node]);
+	stats = rcu_dereference(flow->stats[cpu]);
 
-	/* Check if already have node-specific stats. */
+	/* Check if already have CPU-specific stats. */
 	if (likely(stats)) {
 		spin_lock(&stats->lock);
 		/* Mark if we write on the pre-allocated stats. */
-		if (node == 0 && unlikely(flow->stats_last_writer != node))
-			flow->stats_last_writer = node;
+		if (cpu == 0 && unlikely(flow->stats_last_writer != cpu))
+			flow->stats_last_writer = cpu;
 	} else {
 		stats = rcu_dereference(flow->stats[0]); /* Pre-allocated. */
 		spin_lock(&stats->lock);
 
-		/* If the current NUMA-node is the only writer on the
+		/* If the current CPU is the only writer on the
 		 * pre-allocated stats keep using them.
 		 */
-		if (unlikely(flow->stats_last_writer != node)) {
+		if (unlikely(flow->stats_last_writer != cpu)) {
 			/* A previous locker may have already allocated the
-			 * stats, so we need to check again.  If node-specific
+			 * stats, so we need to check again.  If CPU-specific
 			 * stats were already allocated, we update the pre-
 			 * allocated stats as we have already locked them.
 			 */
-			if (likely(flow->stats_last_writer != NUMA_NO_NODE)
-			    && likely(!rcu_access_pointer(flow->stats[node]))) {
-				/* Try to allocate node-specific stats. */
+			if (likely(flow->stats_last_writer != -1) &&
+			    likely(!rcu_access_pointer(flow->stats[cpu]))) {
+				/* Try to allocate CPU-specific stats. */
 				struct flow_stats *new_stats;
 
 				new_stats =
@@ -114,12 +116,12 @@ void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags,
 					new_stats->tcp_flags = tcp_flags;
 					spin_lock_init(&new_stats->lock);
 
-					rcu_assign_pointer(flow->stats[node],
+					rcu_assign_pointer(flow->stats[cpu],
 							   new_stats);
 					goto unlock;
 				}
 			}
-			flow->stats_last_writer = node;
+			flow->stats_last_writer = cpu;
 		}
 	}
 
@@ -136,14 +138,15 @@ void ovs_flow_stats_get(const struct sw_flow *flow,
 			struct ovs_flow_stats *ovs_stats,
 			unsigned long *used, __be16 *tcp_flags)
 {
-	int node;
+	int cpu;
 
 	*used = 0;
 	*tcp_flags = 0;
 	memset(ovs_stats, 0, sizeof(*ovs_stats));
 
-	for_each_node(node) {
-		struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[node]);
+	/* We open code this to make sure cpu 0 is always considered */
+	for (cpu = 0; cpu < nr_cpu_ids; cpu = cpumask_next(cpu, cpu_possible_mask)) {
+		struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[cpu]);
 
 		if (stats) {
 			/* Local CPU may write on non-local stats, so we must
@@ -163,10 +166,11 @@ void ovs_flow_stats_get(const struct sw_flow *flow,
 /* Called with ovs_mutex. */
 void ovs_flow_stats_clear(struct sw_flow *flow)
 {
-	int node;
+	int cpu;
 
-	for_each_node(node) {
-		struct flow_stats *stats = ovsl_dereference(flow->stats[node]);
+	/* We open code this to make sure cpu 0 is always considered */
+	for (cpu = 0; cpu < nr_cpu_ids; cpu = cpumask_next(cpu, cpu_possible_mask)) {
+		struct flow_stats *stats = ovsl_dereference(flow->stats[cpu]);
 
 		if (stats) {
 			spin_lock_bh(&stats->lock);
@@ -302,24 +306,57 @@ static bool icmp6hdr_ok(struct sk_buff *skb)
 				  sizeof(struct icmp6hdr));
 }
 
-static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+/**
+ * Parse vlan tag from vlan header.
+ * Returns ERROR on memory error.
+ * Returns 0 if it encounters a non-vlan or incomplete packet.
+ * Returns 1 after successfully parsing vlan tag.
+ */
+static int parse_vlan_tag(struct sk_buff *skb, struct vlan_head *key_vh)
 {
-	struct qtag_prefix {
-		__be16 eth_type; /* ETH_P_8021Q */
-		__be16 tci;
-	};
-	struct qtag_prefix *qp;
+	struct vlan_head *vh = (struct vlan_head *)skb->data;
+
+	if (likely(!eth_type_vlan(vh->tpid)))
+		return 0;
 
-	if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
+	if (unlikely(skb->len < sizeof(struct vlan_head) + sizeof(__be16)))
 		return 0;
 
-	if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
-					 sizeof(__be16))))
+	if (unlikely(!pskb_may_pull(skb, sizeof(struct vlan_head) +
+				 sizeof(__be16))))
 		return -ENOMEM;
 
-	qp = (struct qtag_prefix *) skb->data;
-	key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
-	__skb_pull(skb, sizeof(struct qtag_prefix));
+	vh = (struct vlan_head *)skb->data;
+	key_vh->tci = vh->tci | htons(VLAN_TAG_PRESENT);
+	key_vh->tpid = vh->tpid;
+
+	__skb_pull(skb, sizeof(struct vlan_head));
+	return 1;
+}
+
+static int parse_vlan(struct sk_buff *skb, 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;
+
+	if (likely(skb_vlan_tag_present(skb))) {
+		key->eth.vlan.tci = htons(skb->vlan_tci);
+		key->eth.vlan.tpid = skb->vlan_proto;
+	} else {
+		/* Parse outer vlan tag in the non-accelerated case. */
+		res = parse_vlan_tag(skb, &key->eth.vlan);
+		if (res <= 0)
+			return res;
+	}
+
+	/* Parse inner vlan tag. */
+	res = parse_vlan_tag(skb, &key->eth.cvlan);
+	if (res <= 0)
+		return res;
 
 	return 0;
 }
@@ -480,12 +517,8 @@ static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
 	 * update skb->csum here.
 	 */
 
-	key->eth.tci = 0;
-	if (skb_vlan_tag_present(skb))
-		key->eth.tci = htons(skb->vlan_tci);
-	else if (eth->h_proto == htons(ETH_P_8021Q))
-		if (unlikely(parse_vlan(skb, key)))
-			return -ENOMEM;
+	if (unlikely(parse_vlan(skb, key)))
+		return -ENOMEM;
 
 	key->eth.type = parse_ethertype(skb);
 	if (unlikely(key->eth.type == htons(0)))
@@ -734,8 +767,6 @@ int ovs_flow_key_extract_userspace(struct net *net, const struct nlattr *attr,
 {
 	int err;
 
-	memset(key, 0, OVS_SW_FLOW_KEY_METADATA_SIZE);
-
 	/* Extract metadata from netlink attributes. */
 	err = ovs_nla_get_flow_metadata(net, attr, key, log);
 	if (err)