3 files changed, 67 insertions, 10 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 1bc485bb0678..5e22719ce71d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4806,9 +4806,11 @@ static inline void __netif_receive_skb_list_ptype(struct list_head *head,
 		return;
 	if (list_empty(head))
 		return;
-
-	list_for_each_entry_safe(skb, next, head, list)
-		pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
+	if (pt_prev->list_func != NULL)
+		pt_prev->list_func(head, pt_prev, orig_dev);
+	else
+		list_for_each_entry_safe(skb, next, head, list)
+			pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
 }
 
 static void __netif_receive_skb_list_core(struct list_head *head, bool pfmemalloc)
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 9263a2c114e0..c716be13d58c 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1882,6 +1882,7 @@ fs_initcall(ipv4_offload_init);
 static struct packet_type ip_packet_type __read_mostly = {
 	.type = cpu_to_be16(ETH_P_IP),
 	.func = ip_rcv,
+	.list_func = ip_list_rcv,
 };
 
 static int __init inet_init(void)
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 7582713dd18f..914240830bdf 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -408,10 +408,9 @@ drop_error:
 /*
  * 	Main IP Receive routine.
  */
-int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
+static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net)
 {
 	const struct iphdr *iph;
-	struct net *net;
 	u32 len;
 
 	/* When the interface is in promisc. mode, drop all the crap
@@ -421,7 +420,6 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
 		goto drop;
 
 
-	net = dev_net(dev);
 	__IP_UPD_PO_STATS(net, IPSTATS_MIB_IN, skb->len);
 
 	skb = skb_share_check(skb, GFP_ATOMIC);
@@ -489,9 +487,7 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
 	/* Must drop socket now because of tproxy. */
 	skb_orphan(skb);
 
-	return NF_HOOK(NFPROTO_IPV4, NF_INET_PRE_ROUTING,
-		       net, NULL, skb, dev, NULL,
-		       ip_rcv_finish);
+	return skb;
 
 csum_error:
 	__IP_INC_STATS(net, IPSTATS_MIB_CSUMERRORS);
@@ -500,5 +496,63 @@ inhdr_error:
 drop:
 	kfree_skb(skb);
 out:
-	return NET_RX_DROP;
+	return NULL;
+}
+
+/*
+ * IP receive entry point
+ */
+int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
+	   struct net_device *orig_dev)
+{
+	struct net *net = dev_net(dev);
+
+	skb = ip_rcv_core(skb, net);
+	if (skb == NULL)
+		return NET_RX_DROP;
+	return NF_HOOK(NFPROTO_IPV4, NF_INET_PRE_ROUTING,
+		       net, NULL, skb, dev, NULL,
+		       ip_rcv_finish);
+}
+
+static void ip_sublist_rcv(struct list_head *head, struct net_device *dev,
+			   struct net *net)
+{
+	struct sk_buff *skb, *next;
+
+	NF_HOOK_LIST(NFPROTO_IPV4, NF_INET_PRE_ROUTING, net, NULL,
+		     head, dev, NULL, ip_rcv_finish);
+	list_for_each_entry_safe(skb, next, head, list)
+		ip_rcv_finish(net, NULL, skb);
+}
+
+/* Receive a list of IP packets */
+void ip_list_rcv(struct list_head *head, struct packet_type *pt,
+		 struct net_device *orig_dev)
+{
+	struct net_device *curr_dev = NULL;
+	struct net *curr_net = NULL;
+	struct sk_buff *skb, *next;
+	struct list_head sublist;
+
+	list_for_each_entry_safe(skb, next, head, list) {
+		struct net_device *dev = skb->dev;
+		struct net *net = dev_net(dev);
+
+		skb = ip_rcv_core(skb, net);
+		if (skb == NULL)
+			continue;
+
+		if (curr_dev != dev || curr_net != net) {
+			/* dispatch old sublist */
+			list_cut_before(&sublist, head, &skb->list);
+			if (!list_empty(&sublist))
+				ip_sublist_rcv(&sublist, dev, net);
+			/* start new sublist */
+			curr_dev = dev;
+			curr_net = net;
+		}
+	}
+	/* dispatch final sublist */
+	ip_sublist_rcv(head, curr_dev, curr_net);
 }