netdev - Re: [PATCH] cfg80211: support sysfs namespaces

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Date:	Thu, 05 Aug 2010 12:46:17 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Johannes Berg <johannes@...solutions.net>
Cc:	John Linville <linville@...driver.com>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] cfg80211: support sysfs namespaces

Johannes Berg <johannes@...solutions.net> writes:

> From: Johannes Berg <johannes.berg@...el.com>
>
> Enable using network namespaces with
> wireless devices even when sysfs is
> enabled using the same infrastructure
> that was built for netdevs.

Acked-by: "Eric W. Biederman" <ebiederm@...ssion.com>

This looks reasonable.  I assume you have tested this and it is
working now?

>
> Signed-off-by: Johannes Berg <johannes.berg@...el.com>
> ---
> NB: This generates a harmless gcc warning, I submitted
>     a patch to fix it here:
>     http://thread.gmane.org/gmane.linux.kernel/1019330
>
>  include/linux/netdevice.h |    2 ++
>  net/core/net-sysfs.c      |    3 ++-
>  net/wireless/core.c       |    7 ++++++-
>  net/wireless/sysfs.c      |    9 +++++++++
>  4 files changed, 19 insertions(+), 2 deletions(-)
>
> --- wireless-testing.orig/net/core/net-sysfs.c	2010-08-05 17:33:47.000000000 +0200
> +++ wireless-testing/net/core/net-sysfs.c	2010-08-05 17:38:27.000000000 +0200
> @@ -789,12 +789,13 @@ static const void *net_netlink_ns(struct
>  	return sock_net(sk);
>  }
>  
> -static struct kobj_ns_type_operations net_ns_type_operations = {
> +struct kobj_ns_type_operations net_ns_type_operations = {
>  	.type = KOBJ_NS_TYPE_NET,
>  	.current_ns = net_current_ns,
>  	.netlink_ns = net_netlink_ns,
>  	.initial_ns = net_initial_ns,
>  };
> +EXPORT_SYMBOL_GPL(net_ns_type_operations);
>  
>  static void net_kobj_ns_exit(struct net *net)
>  {
> --- wireless-testing.orig/net/wireless/sysfs.c	2010-08-05 17:33:47.000000000 +0200
> +++ wireless-testing/net/wireless/sysfs.c	2010-08-05 17:39:11.000000000 +0200
> @@ -110,6 +110,13 @@ static int wiphy_resume(struct device *d
>  	return ret;
>  }
>  
> +static const void *wiphy_namespace(struct device *d)
> +{
> +	struct wiphy *wiphy = container_of(d, struct wiphy, dev);
> +
> +	return wiphy_net(wiphy);
> +}
> +
>  struct class ieee80211_class = {
>  	.name = "ieee80211",
>  	.owner = THIS_MODULE,
> @@ -120,6 +127,8 @@ struct class ieee80211_class = {
>  #endif
>  	.suspend = wiphy_suspend,
>  	.resume = wiphy_resume,
> +	.ns_type = &net_ns_type_operations,
> +	.namespace = wiphy_namespace,
>  };
>  
>  int wiphy_sysfs_init(void)
> --- wireless-testing.orig/net/wireless/core.c	2010-08-05 17:33:47.000000000 +0200
> +++ wireless-testing/net/wireless/core.c	2010-08-05 17:38:27.000000000 +0200
> @@ -253,11 +253,16 @@ int cfg80211_switch_netns(struct cfg8021
>  			WARN_ON(err);
>  			wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
>  		}
> +
> +		return err;
>  	}
>  
>  	wiphy_net_set(&rdev->wiphy, net);
>  
> -	return err;
> +	err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
> +	WARN_ON(err);
> +
> +	return 0;
>  }
>  
>  static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
> --- wireless-testing.orig/include/linux/netdevice.h	2010-08-05 17:13:50.000000000 +0200
> +++ wireless-testing/include/linux/netdevice.h	2010-08-05 17:39:02.000000000 +0200
> @@ -2171,6 +2171,8 @@ extern void dev_seq_stop(struct seq_file
>  extern int netdev_class_create_file(struct class_attribute *class_attr);
>  extern void netdev_class_remove_file(struct class_attribute *class_attr);
>  
> +extern struct kobj_ns_type_operations net_ns_type_operations;
> +
>  extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
>  
>  extern void linkwatch_run_queue(void);
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