From 1fb9489bf190ce2b3fc03891f3de4b2d30600e28 Mon Sep 17 00:00:00 2001
From: Pavel Emelyanov <xemul@parallels.com>
Date: Wed, 8 Aug 2012 21:53:36 +0000
Subject: net: Loopback ifindex is constant now

As pointed out, there are places, that access net->loopback_dev->ifindex
and after ifindex generation is made per-net this value becomes constant
equals 1. So go ahead and introduce the LOOPBACK_IFINDEX constant and use
it where appropriate.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/net_namespace.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'include/net/net_namespace.h')

diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 6dc3db3466bf..97e441945c13 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -105,6 +105,13 @@ struct net {
 	struct sock		*diag_nlsk;
 };
 
+/*
+ * ifindex generation is per-net namespace, and loopback is
+ * always the 1st device in ns (see net_dev_init), thus any
+ * loopback device should get ifindex 1
+ */
+
+#define LOOPBACK_IFINDEX	1
 
 #include <linux/seq_file_net.h>
 
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