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[NET]: Make the loopback device per network namespace.

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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>
This commit is contained in:
Eric W. Biederman
2007-09-26 22:10:56 -07:00
committed by David S. Miller
parent 0cc217e16c
commit 2774c7aba6
13 changed files with 64 additions and 45 deletions
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18
net/ipv6/addrconf.c
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@ -2410,7 +2410,7 @@ static int addrconf_ifdown(struct net_device *dev, int how)
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 @@ int __init addrconf_init(void)
* 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 @@ void __exit addrconf_cleanup(void)
continue;
addrconf_ifdown(dev, 1);
}
addrconf_ifdown(loopback_dev, 2);
addrconf_ifdown(init_net.loopback_dev, 2);
/*
* Check hash table.