netdev - Re: [PATCH 2/4] ipvs: take care of return value from protocol init

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Message-ID: <alpine.LFD.2.00.1204251126420.1895@ja.ssi.bg>
Date:	Wed, 25 Apr 2012 11:35:28 +0300 (EEST)
From:	Julian Anastasov <ja@....bg>
To:	Hans Schillstrom <hans.schillstrom@...csson.com>
cc:	horms@...ge.net.au, wensong@...ux-vs.org,
	lvs-devel@...r.kernel.org, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, hans@...illstrom.com
Subject: Re: [PATCH 2/4] ipvs: take care of return value from protocol
 init_netns


	Hello,

On Wed, 25 Apr 2012, Hans Schillstrom wrote:

> ip_vs_create_timeout_table() can return NULL
> All functions protocol init_netns is affected of this patch.
> 
> Signed-off-by: Hans Schillstrom <hans.schillstrom@...csson.com>
> ---

> diff --git a/net/netfilter/ipvs/ip_vs_proto.c b/net/netfilter/ipvs/ip_vs_proto.c
> index 6a8d176..0b74795 100644
> --- a/net/netfilter/ipvs/ip_vs_proto.c
> +++ b/net/netfilter/ipvs/ip_vs_proto.c
> @@ -79,7 +79,7 @@ register_ip_vs_proto_netns(struct net *net, struct ip_vs_protocol *pp)
>  	atomic_set(&pd->appcnt, 0);	/* Init app counter */
>  
>  	if (pp->init_netns != NULL)
> -		pp->init_netns(net, pd);
> +		return pp->init_netns(net, pd);

	May be it is better to unlink and free the pd here
if init_netns fails. Currently, protocols attach only
allocated pointer (pd->timeout_table) and it is not a
big problem to call exit_netns on failure but lets do
it safely, every init handler should release its data on
failure and then we should not call exit_netns.

	Patch 1 looks ok and I'll ack it next time.

Regards

--
Julian Anastasov <ja@....bg>
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