[NET]: Make the loopback device per network namespace.
This patch makes loopback_dev per network namespace. Adding
code to create a different loopback device for each network
namespace and adding the code to free a loopback device
when a network namespace exits.
This patch modifies all users the loopback_dev so they
access it as init_net.loopback_dev, keeping all of the
code compiling and working. A later pass will be needed to
update the users to use something other than the initial network
namespace.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dst.c b/net/core/dst.c
index ad5ffa1..16958e6 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -18,6 +18,7 @@
#include <linux/types.h>
#include <net/net_namespace.h>
+#include <net/net_namespace.h>
#include <net/dst.h>
/*
@@ -278,11 +279,11 @@
if (!unregister) {
dst->input = dst->output = dst_discard;
} else {
- dst->dev = loopback_dev;
+ dst->dev = init_net.loopback_dev;
dev_hold(dst->dev);
dev_put(dev);
if (dst->neighbour && dst->neighbour->dev == dev) {
- dst->neighbour->dev = loopback_dev;
+ dst->neighbour->dev = init_net.loopback_dev;
dev_put(dev);
dev_hold(dst->neighbour->dev);
}