netdev - Re: [PATCH net-next v2 7/7] netlink: allow to listen "all" netns

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Date:	Thu, 7 May 2015 13:55:59 +0200
From:	Thomas Graf <tgraf@...g.ch>
To:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, ebiederm@...ssion.com
Subject: Re: [PATCH net-next v2 7/7] netlink: allow to listen "all" netns

On 05/07/15 at 11:02am, Nicolas Dichtel wrote:
> More accurately, listen all netns that have a nsid assigned into the netns
> where the netlink socket is opened.
> For this purpose, a netlink socket option is added:
> NETLINK_LISTEN_ALL_NSID. When this option is set on a netlink socket, this
> socket will receive netlink notifications from all netns that have a nsid
> assigned into the netns where the socket has been opened. The nsid is sent
> to userland via an anscillary data.
> 
> With this patch, a daemon needs only one socket to listen many netns. This
> is useful when the number of netns is high.
> 
> Because 0 is a valid value for a nsid, the field nsid_is_set indicates if
> the field nsid is valid or not. skb->cb is initialized to 0 on skb
> allocation, thus we are sure that we will never send a nsid 0 by error to
> the userland.
> 
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>

LGTM, nice work

Acked-by: Thomas Graf <tgraf@...g.ch>
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