Subject: [PATCH] etun: Implement device statistics
From: Eric W. Biederman <ebiederman@lnxi.com>
Date: 1137568759 -0700

The is a virtual device and I don't keep
interesting statistics.  However this makes
a convienient way to return the ifindex of
the paired device.

---

 drivers/net/etun.c |   41 ++++++++++++++++++++++++++++++++++++++---
 1 files changed, 38 insertions(+), 3 deletions(-)

4142d08e7f69944595e82fdce9a44853f438b01e
diff --git a/drivers/net/etun.c b/drivers/net/etun.c
index 74f2df8..15009a8 100644
--- a/drivers/net/etun.c
+++ b/drivers/net/etun.c
@@ -36,6 +36,13 @@
 static DEFINE_SPINLOCK(etun_lock);
 static LIST_HEAD(etun_list);
 
+#define ETUN_NUM_STATS 1
+static struct {
+	const char string[ETH_GSTRING_LEN];
+} ethtool_stats_keys[ETUN_NUM_STATS] = {
+	{ "rx_ifindex" },
+};
+
 struct etun_info {
 	struct list_head	list;
 	struct net_device	*dev;
@@ -115,10 +122,38 @@ static u32 etun_get_link(struct net_devi
 
 }
 
+static void etun_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
+{
+	switch(stringset) {
+	case ETH_SS_STATS:
+		memcpy(buf, &ethtool_stats_keys, sizeof(ethtool_stats_keys));
+		break;
+	case ETH_SS_TEST:
+	default:
+		break;
+	}
+}
+
+static int etun_get_stats_count(struct net_device *dev)
+{
+	return ETUN_NUM_STATS;
+}
+
+static void etun_get_ethtool_stats(struct net_device *dev,
+	struct ethtool_stats *stats, u64 *data)
+{
+	struct etun_info *info = dev->priv;
+	
+	data[0] = info->rx_dev->ifindex;
+}
+
 static struct ethtool_ops etun_ethtool_ops = {
-	.get_settings	= etun_get_settings,
-	.get_drvinfo	= etun_get_drvinfo,
-	.get_link	= etun_get_link,
+	.get_settings		= etun_get_settings,
+	.get_drvinfo		= etun_get_drvinfo,
+	.get_link		= etun_get_link,
+	.get_strings		= etun_get_strings,
+	.get_stats_count	= etun_get_stats_count,
+	.get_ethtool_stats	= etun_get_ethtool_stats,
 };
 
 static int etun_open(struct net_device *dev)
-- 
1.0.GIT