X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Fflow.c;h=fdfe3e9467119bb7a48effe37dea6c7187dcbc95;hb=dabd3fe3f8c0161aab5dc8e2cefb6375e810a38b;hp=78dea3a66283de0df43f1f2c03b8ba7bb565d651;hpb=0fd0d0834f79d6cfe8a0eccc19732bae365aa575;p=openvswitch

diff --git a/datapath/flow.c b/datapath/flow.c
index 78dea3a6..fdfe3e94 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007-2011 Nicira Networks.
+ * Copyright (c) 2007-2011 Nicira, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of version 2 of the GNU General Public
@@ -32,7 +32,6 @@
 #include <linux/in.h>
 #include <linux/rcupdate.h>
 #include <linux/if_arp.h>
-#include <linux/if_ether.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <linux/tcp.h>
@@ -47,7 +46,6 @@
 #include "vlan.h"
 
 static struct kmem_cache *flow_cache;
-static unsigned int hash_seed __read_mostly;
 
 static int check_header(struct sk_buff *skb, int len)
 {
@@ -186,8 +184,10 @@ void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
 {
 	u8 tcp_flags = 0;
 
-	if (flow->key.eth.type == htons(ETH_P_IP) &&
-	    flow->key.ip.proto == IPPROTO_TCP) {
+	if ((flow->key.eth.type == htons(ETH_P_IP) ||
+	     flow->key.eth.type == htons(ETH_P_IPV6)) &&
+	    flow->key.ip.proto == IPPROTO_TCP &&
+	    likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
 		u8 *tcp = (u8 *)tcp_hdr(skb);
 		tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
 	}
@@ -205,10 +205,7 @@ struct sw_flow_actions *ovs_flow_actions_alloc(const struct nlattr *actions)
 	int actions_len = nla_len(actions);
 	struct sw_flow_actions *sfa;
 
-	/* At least DP_MAX_PORTS actions are required to be able to flood a
-	 * packet to every port.  Factor of 2 allows for setting VLAN tags,
-	 * etc. */
-	if (actions_len > 2 * DP_MAX_PORTS * nla_total_size(4))
+	if (actions_len > MAX_ACTIONS_BUFSIZE)
 		return ERR_PTR(-EINVAL);
 
 	sfa = kmalloc(sizeof(*sfa) + actions_len, GFP_KERNEL);
@@ -229,15 +226,14 @@ struct sw_flow *ovs_flow_alloc(void)
 		return ERR_PTR(-ENOMEM);
 
 	spin_lock_init(&flow->lock);
-	atomic_set(&flow->refcnt, 1);
 	flow->sf_acts = NULL;
-	flow->dead = false;
 
 	return flow;
 }
 
 static struct hlist_head *find_bucket(struct flow_table *table, u32 hash)
 {
+	hash = jhash_1word(hash, table->hash_seed);
 	return flex_array_get(table->buckets,
 				(hash & (table->n_buckets - 1)));
 }
@@ -285,16 +281,13 @@ struct flow_table *ovs_flow_tbl_alloc(int new_size)
 	}
 	table->n_buckets = new_size;
 	table->count = 0;
+	table->node_ver = 0;
+	table->keep_flows = false;
+	get_random_bytes(&table->hash_seed, sizeof(u32));
 
 	return table;
 }
 
-static void flow_free(struct sw_flow *flow)
-{
-	flow->dead = true;
-	ovs_flow_put(flow);
-}
-
 void ovs_flow_tbl_destroy(struct flow_table *table)
 {
 	int i;
@@ -302,17 +295,22 @@ void ovs_flow_tbl_destroy(struct flow_table *table)
 	if (!table)
 		return;
 
+	if (table->keep_flows)
+		goto skip_flows;
+
 	for (i = 0; i < table->n_buckets; i++) {
 		struct sw_flow *flow;
 		struct hlist_head *head = flex_array_get(table->buckets, i);
 		struct hlist_node *node, *n;
+		int ver = table->node_ver;
 
-		hlist_for_each_entry_safe(flow, node, n, head, hash_node) {
-			hlist_del_init_rcu(&flow->hash_node);
-			flow_free(flow);
+		hlist_for_each_entry_safe(flow, node, n, head, hash_node[ver]) {
+			hlist_del_rcu(&flow->hash_node[ver]);
+			ovs_flow_free(flow);
 		}
 	}
 
+skip_flows:
 	free_buckets(table->buckets);
 	kfree(table);
 }
@@ -337,12 +335,14 @@ struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *la
 	struct sw_flow *flow;
 	struct hlist_head *head;
 	struct hlist_node *n;
+	int ver;
 	int i;
 
+	ver = table->node_ver;
 	while (*bucket < table->n_buckets) {
 		i = 0;
 		head = flex_array_get(table->buckets, *bucket);
-		hlist_for_each_entry_rcu(flow, n, head, hash_node) {
+		hlist_for_each_entry_rcu(flow, n, head, hash_node[ver]) {
 			if (i < *last) {
 				i++;
 				continue;
@@ -357,62 +357,81 @@ struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *la
 	return NULL;
 }
 
-struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
+static void __flow_tbl_insert(struct flow_table *table, struct sw_flow *flow)
 {
-	struct flow_table *new_table;
-	int n_buckets = table->n_buckets * 2;
+	struct hlist_head *head;
+	head = find_bucket(table, flow->hash);
+	hlist_add_head_rcu(&flow->hash_node[table->node_ver], head);
+	table->count++;
+}
+
+static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new)
+{
+	int old_ver;
 	int i;
 
-	new_table = ovs_flow_tbl_alloc(n_buckets);
-	if (!new_table)
-		return ERR_PTR(-ENOMEM);
+	old_ver = old->node_ver;
+	new->node_ver = !old_ver;
 
-	for (i = 0; i < table->n_buckets; i++) {
+	/* Insert in new table. */
+	for (i = 0; i < old->n_buckets; i++) {
 		struct sw_flow *flow;
 		struct hlist_head *head;
-		struct hlist_node *n, *pos;
+		struct hlist_node *n;
 
-		head = flex_array_get(table->buckets, i);
+		head = flex_array_get(old->buckets, i);
 
-		hlist_for_each_entry_safe(flow, n, pos, head, hash_node) {
-			hlist_del_init_rcu(&flow->hash_node);
-			ovs_flow_tbl_insert(new_table, flow);
-		}
+		hlist_for_each_entry(flow, n, head, hash_node[old_ver])
+			__flow_tbl_insert(new, flow);
 	}
-
-	return new_table;
+	old->keep_flows = true;
 }
 
-/* RCU callback used by ovs_flow_deferred_free. */
-static void rcu_free_flow_callback(struct rcu_head *rcu)
+static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets)
 {
-	struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
+	struct flow_table *new_table;
+
+	new_table = ovs_flow_tbl_alloc(n_buckets);
+	if (!new_table)
+		return ERR_PTR(-ENOMEM);
+
+	flow_table_copy_flows(table, new_table);
 
-	flow->dead = true;
-	ovs_flow_put(flow);
+	return new_table;
 }
 
-/* Schedules 'flow' to be freed after the next RCU grace period.
- * The caller must hold rcu_read_lock for this to be sensible. */
-void ovs_flow_deferred_free(struct sw_flow *flow)
+struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table)
 {
-	call_rcu(&flow->rcu, rcu_free_flow_callback);
+	return __flow_tbl_rehash(table, table->n_buckets);
 }
 
-void ovs_flow_hold(struct sw_flow *flow)
+struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
 {
-	atomic_inc(&flow->refcnt);
+	return __flow_tbl_rehash(table, table->n_buckets * 2);
 }
 
-void ovs_flow_put(struct sw_flow *flow)
+void ovs_flow_free(struct sw_flow *flow)
 {
 	if (unlikely(!flow))
 		return;
 
-	if (atomic_dec_and_test(&flow->refcnt)) {
-		kfree((struct sf_flow_acts __force *)flow->sf_acts);
-		kmem_cache_free(flow_cache, flow);
-	}
+	kfree((struct sf_flow_acts __force *)flow->sf_acts);
+	kmem_cache_free(flow_cache, flow);
+}
+
+/* RCU callback used by ovs_flow_deferred_free. */
+static void rcu_free_flow_callback(struct rcu_head *rcu)
+{
+	struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
+
+	ovs_flow_free(flow);
+}
+
+/* Schedules 'flow' to be freed after the next RCU grace period.
+ * The caller must hold rcu_read_lock for this to be sensible. */
+void ovs_flow_deferred_free(struct sw_flow *flow)
+{
+	call_rcu(&flow->rcu, rcu_free_flow_callback);
 }
 
 /* RCU callback used by ovs_flow_deferred_free_acts. */
@@ -602,7 +621,8 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
 	memset(key, 0, sizeof(*key));
 
 	key->phy.priority = skb->priority;
-	key->phy.tun_id = OVS_CB(skb)->tun_id;
+	if (OVS_CB(skb)->tun_key)
+		memcpy(&key->phy.tun.tun_key, OVS_CB(skb)->tun_key, sizeof(key->phy.tun.tun_key));
 	key->phy.in_port = in_port;
 
 	skb_reset_mac_header(skb);
@@ -689,7 +709,8 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
 			}
 		}
 
-	} else if (key->eth.type == htons(ETH_P_ARP) && arphdr_ok(skb)) {
+	} else if ((key->eth.type == htons(ETH_P_ARP) ||
+		   key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) {
 		struct arp_eth_header *arp;
 
 		arp = (struct arp_eth_header *)skb_network_header(skb);
@@ -702,15 +723,11 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
 			/* We only match on the lower 8 bits of the opcode. */
 			if (ntohs(arp->ar_op) <= 0xff)
 				key->ip.proto = ntohs(arp->ar_op);
-
-			if (key->ip.proto == ARPOP_REQUEST
-					|| key->ip.proto == ARPOP_REPLY) {
-				memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
-				memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
-				memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN);
-				memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN);
-				key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
-			}
+			memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
+			memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
+			memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN);
+			memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN);
+			key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
 		}
 	} else if (key->eth.type == htons(ETH_P_IPV6)) {
 		int nh_len;             /* IPv6 Header + Extensions */
@@ -759,9 +776,18 @@ out:
 	return error;
 }
 
-u32 ovs_flow_hash(const struct sw_flow_key *key, int key_len)
+static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len)
 {
-	return jhash2((u32 *)key, DIV_ROUND_UP(key_len, sizeof(u32)), hash_seed);
+	return jhash2((u32 *)((u8 *)key + key_start),
+		      DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0);
+}
+
+static int flow_key_start(struct sw_flow_key *key)
+{
+	if (key->phy.tun.tun_key.ipv4_dst)
+		return 0;
+	else
+		return offsetof(struct sw_flow_key, phy.priority);
 }
 
 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
@@ -770,37 +796,38 @@ struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
 	struct sw_flow *flow;
 	struct hlist_node *n;
 	struct hlist_head *head;
+	u8 *_key;
+	int key_start;
 	u32 hash;
 
-	hash = ovs_flow_hash(key, key_len);
+	key_start = flow_key_start(key);
+	hash = ovs_flow_hash(key, key_start, key_len);
 
+	_key = (u8 *) key + key_start;
 	head = find_bucket(table, hash);
-	hlist_for_each_entry_rcu(flow, n, head, hash_node) {
+	hlist_for_each_entry_rcu(flow, n, head, hash_node[table->node_ver]) {
 
 		if (flow->hash == hash &&
-		    !memcmp(&flow->key, key, key_len)) {
+		    !memcmp((u8 *)&flow->key + key_start, _key, key_len - key_start)) {
 			return flow;
 		}
 	}
 	return NULL;
 }
 
-void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow)
+void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
+			 struct sw_flow_key *key, int key_len)
 {
-	struct hlist_head *head;
-
-	head = find_bucket(table, flow->hash);
-	hlist_add_head_rcu(&flow->hash_node, head);
-	table->count++;
+	flow->hash = ovs_flow_hash(key, flow_key_start(key), key_len);
+	memcpy(&flow->key, key, sizeof(flow->key));
+	__flow_tbl_insert(table, flow);
 }
 
 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow)
 {
-	if (!hlist_unhashed(&flow->hash_node)) {
-		hlist_del_init_rcu(&flow->hash_node);
-		table->count--;
-		BUG_ON(table->count < 0);
-	}
+	hlist_del_rcu(&flow->hash_node[table->node_ver]);
+	table->count--;
+	BUG_ON(table->count < 0);
 }
 
 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute.  */
@@ -819,6 +846,7 @@ const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
 	[OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
 	[OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
 	[OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
+	[OVS_KEY_ATTR_IPV4_TUNNEL] = sizeof(struct ovs_key_ipv4_tunnel),
 
 	/* Not upstream. */
 	[OVS_KEY_ATTR_TUN_ID] = sizeof(__be64),
@@ -994,12 +1022,41 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
 		swkey->phy.in_port = in_port;
 		attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
 	} else {
-		swkey->phy.in_port = USHRT_MAX;
+		swkey->phy.in_port = DP_MAX_PORTS;
 	}
 
-	if (attrs & (1ULL << OVS_KEY_ATTR_TUN_ID)) {
-		swkey->phy.tun_id = nla_get_be64(a[OVS_KEY_ATTR_TUN_ID]);
+	if (attrs & (1ULL << OVS_KEY_ATTR_TUN_ID) &&
+	    attrs & (1ULL << OVS_KEY_ATTR_IPV4_TUNNEL)) {
+		struct ovs_key_ipv4_tunnel *tun_key;
+		__be64 tun_id;
+
+		tun_key = nla_data(a[OVS_KEY_ATTR_IPV4_TUNNEL]);
+
+		if (!tun_key->ipv4_dst)
+			return -EINVAL;
+		if (!(tun_key->tun_flags & OVS_TNL_F_KEY))
+			return -EINVAL;
+
+		tun_id = nla_get_be64(a[OVS_KEY_ATTR_TUN_ID]);
+		if (tun_id != tun_key->tun_id)
+			return -EINVAL;
+
+		memcpy(&swkey->phy.tun.tun_key, tun_key,
+			sizeof(swkey->phy.tun.tun_key));
+
 		attrs &= ~(1ULL << OVS_KEY_ATTR_TUN_ID);
+		attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4_TUNNEL);
+	} else if (attrs & (1ULL << OVS_KEY_ATTR_IPV4_TUNNEL)) {
+		struct ovs_key_ipv4_tunnel *tun_key;
+		tun_key = nla_data(a[OVS_KEY_ATTR_IPV4_TUNNEL]);
+
+		if (!tun_key->ipv4_dst)
+			return -EINVAL;
+
+		memcpy(&swkey->phy.tun.tun_key, tun_key,
+			sizeof(swkey->phy.tun.tun_key));
+
+		attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4_TUNNEL);
 	}
 
 	/* Data attributes. */
@@ -1100,7 +1157,8 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
 			if (err)
 				return err;
 		}
-	} else if (swkey->eth.type == htons(ETH_P_ARP)) {
+	} else if (swkey->eth.type == htons(ETH_P_ARP) ||
+		   swkey->eth.type == htons(ETH_P_RARP)) {
 		const struct ovs_key_arp *arp_key;
 
 		if (!(attrs & (1 << OVS_KEY_ATTR_ARP)))
@@ -1137,15 +1195,17 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
  * get the metadata, that is, the parts of the flow key that cannot be
  * extracted from the packet itself.
  */
-int ovs_flow_metadata_from_nlattrs(u32 *priority, u16 *in_port, __be64 *tun_id,
-				   const struct nlattr *attr)
+
+int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, int key_len, const struct nlattr *attr)
 {
+	struct ovs_key_ipv4_tunnel *tun_key = &flow->key.phy.tun.tun_key;
 	const struct nlattr *nla;
 	int rem;
+	__be64 tun_id = 0;
 
-	*in_port = USHRT_MAX;
-	*tun_id = 0;
-	*priority = 0;
+	flow->key.phy.in_port = DP_MAX_PORTS;
+	flow->key.phy.priority = 0;
+	memset(tun_key, 0, sizeof(flow->key.phy.tun.tun_key));
 
 	nla_for_each_nested(nla, attr, rem) {
 		int type = nla_type(nla);
@@ -1156,23 +1216,55 @@ int ovs_flow_metadata_from_nlattrs(u32 *priority, u16 *in_port, __be64 *tun_id,
 
 			switch (type) {
 			case OVS_KEY_ATTR_PRIORITY:
-				*priority = nla_get_u32(nla);
+				flow->key.phy.priority = nla_get_u32(nla);
 				break;
 
 			case OVS_KEY_ATTR_TUN_ID:
-				*tun_id = nla_get_be64(nla);
+				tun_id = nla_get_be64(nla);
+
+				if (tun_key->ipv4_dst) {
+					if (!(tun_key->tun_flags & OVS_TNL_F_KEY))
+						return -EINVAL;
+					if (tun_key->tun_id != tun_id)
+						return -EINVAL;
+					break;
+				}
+				tun_key->tun_id = tun_id;
+				tun_key->tun_flags |= OVS_TNL_F_KEY;
+
+				break;
+
+			case OVS_KEY_ATTR_IPV4_TUNNEL:
+				if (tun_key->tun_flags & OVS_TNL_F_KEY) {
+					tun_id = tun_key->tun_id;
+
+					memcpy(tun_key, nla_data(nla), sizeof(*tun_key));
+					if (!(tun_key->tun_flags & OVS_TNL_F_KEY))
+						return -EINVAL;
+
+					if (tun_key->tun_id != tun_id)
+						return -EINVAL;
+				} else
+					memcpy(tun_key, nla_data(nla), sizeof(*tun_key));
+
+				if (!tun_key->ipv4_dst)
+					return -EINVAL;
 				break;
 
 			case OVS_KEY_ATTR_IN_PORT:
 				if (nla_get_u32(nla) >= DP_MAX_PORTS)
 					return -EINVAL;
-				*in_port = nla_get_u32(nla);
+				flow->key.phy.in_port = nla_get_u32(nla);
 				break;
 			}
 		}
 	}
 	if (rem)
 		return -EINVAL;
+
+	flow->hash = ovs_flow_hash(&flow->key,
+				   flow_key_start(&flow->key), key_len);
+
 	return 0;
 }
 
@@ -1181,14 +1273,25 @@ int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
 	struct ovs_key_ethernet *eth_key;
 	struct nlattr *nla, *encap;
 
-	if (swkey->phy.priority)
-		NLA_PUT_U32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority);
+	if (swkey->phy.priority &&
+	    nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority))
+		goto nla_put_failure;
 
-	if (swkey->phy.tun_id != cpu_to_be64(0))
-		NLA_PUT_BE64(skb, OVS_KEY_ATTR_TUN_ID, swkey->phy.tun_id);
+	if (swkey->phy.tun.tun_key.ipv4_dst) {
+		struct ovs_key_ipv4_tunnel *tun_key;
+		nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4_TUNNEL, sizeof(*tun_key));
+		if (!nla)
+			goto nla_put_failure;
+		tun_key = nla_data(nla);
+		memcpy(tun_key, &swkey->phy.tun.tun_key, sizeof(*tun_key));
+	}
+	if ((swkey->phy.tun.tun_key.tun_flags & OVS_TNL_F_KEY) &&
+	    nla_put_be64(skb, OVS_KEY_ATTR_TUN_ID, swkey->phy.tun.tun_key.tun_id))
+		goto nla_put_failure;
 
-	if (swkey->phy.in_port != USHRT_MAX)
-		NLA_PUT_U32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port);
+	if (swkey->phy.in_port != DP_MAX_PORTS &&
+	    nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port))
+		goto nla_put_failure;
 
 	nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
 	if (!nla)
@@ -1198,8 +1301,9 @@ int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
 	memcpy(eth_key->eth_dst, swkey->eth.dst, ETH_ALEN);
 
 	if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
-		NLA_PUT_BE16(skb, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_P_8021Q));
-		NLA_PUT_BE16(skb, OVS_KEY_ATTR_VLAN, swkey->eth.tci);
+		if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_P_8021Q)) ||
+		    nla_put_be16(skb, OVS_KEY_ATTR_VLAN, swkey->eth.tci))
+			goto nla_put_failure;
 		encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
 		if (!swkey->eth.tci)
 			goto unencap;
@@ -1210,7 +1314,8 @@ int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
 	if (swkey->eth.type == htons(ETH_P_802_2))
 		goto unencap;
 
-	NLA_PUT_BE16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type);
+	if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type))
+		goto nla_put_failure;
 
 	if (swkey->eth.type == htons(ETH_P_IP)) {
 		struct ovs_key_ipv4 *ipv4_key;
@@ -1241,7 +1346,8 @@ int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
 		ipv6_key->ipv6_tclass = swkey->ip.tos;
 		ipv6_key->ipv6_hlimit = swkey->ip.ttl;
 		ipv6_key->ipv6_frag = swkey->ip.frag;
-	} else if (swkey->eth.type == htons(ETH_P_ARP)) {
+	} else if (swkey->eth.type == htons(ETH_P_ARP) ||
+		   swkey->eth.type == htons(ETH_P_RARP)) {
 		struct ovs_key_arp *arp_key;
 
 		nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
@@ -1345,8 +1451,6 @@ int ovs_flow_init(void)
 	if (flow_cache == NULL)
 		return -ENOMEM;
 
-	get_random_bytes(&hash_seed, sizeof(hash_seed));
-
 	return 0;
 }