From 7356325c8a2abc9c0a658a7b85e0edccbd6fbe1a Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Tue, 5 Feb 2013 20:22:50 +0000
Subject: [PATCH] --- yaml --- r: 352113 b: refs/heads/master c:
 cd431e738509e74726055390c9e5e81e8e7e03ec h: refs/heads/master i:   352111:
 63b55a4a980515fb70a1b966299ba4dfc7d2adfc v: v3

---
 [refs]                           |  2 +-
 trunk/drivers/net/macvlan.c      | 23 +++++++++++++++++++++++
 trunk/include/linux/if_macvlan.h |  6 ++++++
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 39ec2a57dea5..c0c7606dd2a2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6d1ccff627806829c46091bd9d9835302a3fbf5f
+refs/heads/master: cd431e738509e74726055390c9e5e81e8e7e03ec
diff --git a/trunk/drivers/net/macvlan.c b/trunk/drivers/net/macvlan.c
index 7b44ebd7770e..f494da82c33f 100644
--- a/trunk/drivers/net/macvlan.c
+++ b/trunk/drivers/net/macvlan.c
@@ -29,6 +29,7 @@
 #include <linux/if_vlan.h>
 #include <linux/if_link.h>
 #include <linux/if_macvlan.h>
+#include <linux/hash.h>
 #include <net/rtnetlink.h>
 #include <net/xfrm.h>
 
@@ -126,6 +127,13 @@ static int macvlan_broadcast_one(struct sk_buff *skb,
 	return vlan->receive(skb);
 }
 
+static unsigned int mc_hash(const unsigned char *addr)
+{
+	u32 val = __get_unaligned_cpu32(addr + 2);
+
+	return hash_32(val, MACVLAN_MC_FILTER_BITS);
+}
+
 static void macvlan_broadcast(struct sk_buff *skb,
 			      const struct macvlan_port *port,
 			      struct net_device *src,
@@ -137,6 +145,7 @@ static void macvlan_broadcast(struct sk_buff *skb,
 	struct sk_buff *nskb;
 	unsigned int i;
 	int err;
+	unsigned int hash = mc_hash(eth->h_dest);
 
 	if (skb->protocol == htons(ETH_P_PAUSE))
 		return;
@@ -146,6 +155,8 @@ static void macvlan_broadcast(struct sk_buff *skb,
 			if (vlan->dev == src || !(vlan->mode & mode))
 				continue;
 
+			if (!test_bit(hash, vlan->mc_filter))
+				continue;
 			nskb = skb_clone(skb, GFP_ATOMIC);
 			err = macvlan_broadcast_one(nskb, vlan, eth,
 					 mode == MACVLAN_MODE_BRIDGE);
@@ -405,6 +416,18 @@ static void macvlan_set_mac_lists(struct net_device *dev)
 {
 	struct macvlan_dev *vlan = netdev_priv(dev);
 
+	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
+		bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
+	} else {
+		struct netdev_hw_addr *ha;
+		DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
+
+		bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
+		netdev_for_each_mc_addr(ha, dev) {
+			__set_bit(mc_hash(ha->addr), filter);
+		}
+		bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
+	}
 	dev_uc_sync(vlan->lowerdev, dev);
 	dev_mc_sync(vlan->lowerdev, dev);
 }
diff --git a/trunk/include/linux/if_macvlan.h b/trunk/include/linux/if_macvlan.h
index f65e8d250f7e..84dde1dd1da4 100644
--- a/trunk/include/linux/if_macvlan.h
+++ b/trunk/include/linux/if_macvlan.h
@@ -52,6 +52,9 @@ struct macvlan_pcpu_stats {
  */
 #define MAX_MACVTAP_QUEUES	(NR_CPUS < 16 ? NR_CPUS : 16)
 
+#define MACVLAN_MC_FILTER_BITS	8
+#define MACVLAN_MC_FILTER_SZ	(1 << MACVLAN_MC_FILTER_BITS)
+
 struct macvlan_dev {
 	struct net_device	*dev;
 	struct list_head	list;
@@ -59,6 +62,9 @@ struct macvlan_dev {
 	struct macvlan_port	*port;
 	struct net_device	*lowerdev;
 	struct macvlan_pcpu_stats __percpu *pcpu_stats;
+
+	DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
+
 	enum macvlan_mode	mode;
 	u16			flags;
 	int (*receive)(struct sk_buff *skb);