netdev - Re: [PATCH net-next] route: allow to route in a peer netns via lwt framework

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Message-ID: <55B24C85.2010502@6wind.com>
Date:	Fri, 24 Jul 2015 16:32:37 +0200
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	David Ahern <dsa@...ulusnetworks.com>, davem@...emloft.net
CC:	netdev@...r.kernel.org, roopa@...ulusnetworks.com, tgraf@...g.ch
Subject: Re: [PATCH net-next] route: allow to route in a peer netns via lwt
 framework

Le 24/07/2015 16:28, David Ahern a écrit :
> On 7/23/15 8:22 AM, Nicolas Dichtel wrote:
>>   static netdev_tx_t loopback_xmit(struct sk_buff *skb,
>>                    struct net_device *dev)
>>   {
>> +    int nsid = skb_lwt_netns_info(skb);
>>       struct pcpu_lstats *lb_stats;
>>       int len;
>>
>> +    if (nsid >= 0) {
>> +        struct net *peernet = get_net_ns_by_id(dev_net(dev), nsid);
>> +
>> +        if (!peernet) {
>
> If nsid is > 0 then the peer namespace should exist right? So for this failure
> path why not increment tx_error stat?
I was not sure about that, because before my patch we increment statistics only
in case of NET_RX_SUCCESS.
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