netdev - [PATCH net-next-2.6 1/4] net: introduce mc list helpers

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Date:	Thu, 22 Oct 2009 15:52:21 +0200
From:	Jiri Pirko <jpirko@...hat.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, eric.dumazet@...il.com,
	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	bruce.w.allan@...el.com, peter.p.waskiewicz.jr@...el.com,
	john.ronciak@...el.com, e1000-devel@...ts.sourceforge.net,
	mchehab@...radead.org, linux-media@...r.kernel.org
Subject: [PATCH net-next-2.6 1/4] net: introduce mc list helpers

This helpers should be used by network drivers to access to netdev
multicast lists.

Signed-off-by: Jiri Pirko <jpirko@...hat.com>
---
 include/linux/netdevice.h |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 8380009..7edc4a6 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -921,6 +921,28 @@ struct net_device
 
 #define	NETDEV_ALIGN		32
 
+static inline int netdev_mc_count(struct net_device *dev)
+{
+	return dev->mc_count;
+}
+
+static inline bool netdev_mc_empty(struct net_device *dev)
+{
+	return netdev_mc_count(dev) == 0;
+}
+
+static inline void netdev_mc_walk(struct net_device *dev,
+				  void (*func)(void *, unsigned char *),
+				  void *data)
+{
+	struct dev_addr_list *mclist;
+	int i;
+
+	for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
+	     i++, mclist = mclist->next)
+		func(data, mclist->dmi_addr);
+}
+
 static inline
 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
 					 unsigned int index)
-- 
1.6.2.5

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