Commit e0da5a48 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller
Browse files

[NETNS]: Create ipv6 devconf-s for namespaces 



This is the core. Declare and register the pernet subsys for
addrconf. The init callback the will create the devconf-s.

The init_net will reuse the existing statically declared confs,
so that accessing them from inside the ipv6 code will still
work.

The register_pernet_subsys() is moved above the ipv6_add_dev()
call for loopback, because this function will need the
net->devconf_dflt pointer to be already set.

Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bff16c2f

include/net/netns/ipv6.h

+2 −0
Original line number Diff line number Diff line
@@ -28,5 +28,7 @@ struct netns_sysctl_ipv6 { 


struct netns_ipv6 {

	struct netns_sysctl_ipv6 sysctl;

	struct ipv6_devconf	*devconf_all;

	struct ipv6_devconf	*devconf_dflt;

};

#endif

net/ipv6/addrconf.c

+70 −12
Original line number Diff line number Diff line
@@ -4135,6 +4135,70 @@ static void addrconf_sysctl_unregister(struct inet6_dev *idev) 


#endif



static int addrconf_init_net(struct net *net)

{

	int err;

	struct ipv6_devconf *all, *dflt;



	err = -ENOMEM;

	all = &ipv6_devconf;

	dflt = &ipv6_devconf_dflt;



	if (net != &init_net) {

		all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);

		if (all == NULL)

			goto err_alloc_all;



		dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);

		if (dflt == NULL)

			goto err_alloc_dflt;

	}



	net->ipv6.devconf_all = all;

	net->ipv6.devconf_dflt = dflt;



#ifdef CONFIG_SYSCTL

	err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,

			NULL, all);

	if (err < 0)

		goto err_reg_all;



	err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,

			NULL, dflt);

	if (err < 0)

		goto err_reg_dflt;

#endif

	return 0;



#ifdef CONFIG_SYSCTL

err_reg_dflt:

	__addrconf_sysctl_unregister(all);

err_reg_all:

	kfree(dflt);

#endif

err_alloc_dflt:

	kfree(all);

err_alloc_all:

	return err;

}



static void addrconf_exit_net(struct net *net)

{

#ifdef CONFIG_SYSCTL

	__addrconf_sysctl_unregister(net->ipv6.devconf_dflt);

	__addrconf_sysctl_unregister(net->ipv6.devconf_all);

#endif

	if (net != &init_net) {

		kfree(net->ipv6.devconf_dflt);

		kfree(net->ipv6.devconf_all);

	}

}



static struct pernet_operations addrconf_ops = {

	.init = addrconf_init_net,

	.exit = addrconf_exit_net,

};



/*

 *      Device notifier

 */
@@ -4167,6 +4231,8 @@ int __init addrconf_init(void) 
		return err;

	}



	register_pernet_subsys(&addrconf_ops);



	/* The addrconf netdev notifier requires that loopback_dev

	 * has it's ipv6 private information allocated and setup

	 * before it can bring up and give link-local addresses
@@ -4190,7 +4256,7 @@ int __init addrconf_init(void) 
		err = -ENOMEM;

	rtnl_unlock();

	if (err)

		return err;

		goto errlo;



	ip6_null_entry.u.dst.dev = init_net.loopback_dev;

	ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
@@ -4218,16 +4284,11 @@ int __init addrconf_init(void) 


	ipv6_addr_label_rtnl_register();



#ifdef CONFIG_SYSCTL

	__addrconf_sysctl_register(&init_net, "all", NET_PROTO_CONF_ALL,

			NULL, &ipv6_devconf);

	__addrconf_sysctl_register(&init_net, "default", NET_PROTO_CONF_DEFAULT,

			NULL, &ipv6_devconf_dflt);

#endif



	return 0;

errout:

	unregister_netdevice_notifier(&ipv6_dev_notf);

errlo:

	unregister_pernet_subsys(&addrconf_ops);



	return err;

}
@@ -4240,10 +4301,7 @@ void addrconf_cleanup(void) 


	unregister_netdevice_notifier(&ipv6_dev_notf);



#ifdef CONFIG_SYSCTL

	__addrconf_sysctl_unregister(&ipv6_devconf_dflt);

	__addrconf_sysctl_unregister(&ipv6_devconf);

#endif

	unregister_pernet_subsys(&addrconf_ops);



	rtnl_lock();

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