[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/ipv6/addrconf.c b/net/ipv6/addrconf.c
index b43574f..6d5c3c2 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2410,7 +2410,7 @@
ASSERT_RTNL();
- if (dev == loopback_dev && how == 1)
+ if (dev == init_net.loopback_dev && how == 1)
how = 0;
rt6_ifdown(dev);
@@ -4212,19 +4212,19 @@
* device and it being up should be removed.
*/
rtnl_lock();
- if (!ipv6_add_dev(loopback_dev))
+ if (!ipv6_add_dev(init_net.loopback_dev))
err = -ENOMEM;
rtnl_unlock();
if (err)
return err;
- ip6_null_entry.u.dst.dev = loopback_dev;
- ip6_null_entry.rt6i_idev = in6_dev_get(loopback_dev);
+ ip6_null_entry.u.dst.dev = init_net.loopback_dev;
+ ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
- ip6_prohibit_entry.u.dst.dev = loopback_dev;
- ip6_prohibit_entry.rt6i_idev = in6_dev_get(loopback_dev);
- ip6_blk_hole_entry.u.dst.dev = loopback_dev;
- ip6_blk_hole_entry.rt6i_idev = in6_dev_get(loopback_dev);
+ ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev;
+ ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
+ ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev;
+ ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
#endif
register_netdevice_notifier(&ipv6_dev_notf);
@@ -4279,7 +4279,7 @@
continue;
addrconf_ifdown(dev, 1);
}
- addrconf_ifdown(loopback_dev, 2);
+ addrconf_ifdown(init_net.loopback_dev, 2);
/*
* Check hash table.