netdev - Re: [PATCH net-next 3/4] netns: bridge: allow unprivileged users add/delete mdb entry

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Message-ID: <20130201034629.GE8400@us.ibm.com>
Date:	Thu, 31 Jan 2013 19:46:29 -0800
From:	Matt Helsley <matthltc@...ux.vnet.ibm.com>
To:	Gao feng <gaofeng@...fujitsu.com>
Cc:	davem@...emloft.net, amwang@...hat.com, netdev@...r.kernel.org,
	containers@...ts.linux-foundation.org, ebiederm@...ssion.com,
	pablo@...filter.org
Subject: Re: [PATCH net-next 3/4] netns: bridge: allow unprivileged users
 add/delete mdb entry

On Fri, Feb 01, 2013 at 10:30:59AM +0800, Gao feng wrote:
> since the mdb table is belong to bridge device,and the
> bridge device can only be seen in one netns.
> So it's safe to allow unprivileged user which is the
> creator of userns and netns to modify the mdb table.
> 
> Signed-off-by: Gao feng <gaofeng@...fujitsu.com>
> ---
>  net/bridge/br_mdb.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
> index acc9f4c..38991e0 100644
> --- a/net/bridge/br_mdb.c
> +++ b/net/bridge/br_mdb.c
> @@ -272,9 +272,6 @@ static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
>  	struct net_device *dev;
>  	int err;
> 
> -	if (!capable(CAP_NET_ADMIN))
> -		return -EPERM;
> -

I'm wondering why this doesn't follow the:

...
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))

pattern like the rest of the changes you provided. Perhaps I'm
neglecting something but it looks wrong to remove the CAP_NET_ADMIN
check entirely.

Cheers,
	-Matt Helsley

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