netdev - Re: tap/bridge: Dropping NETIF_F_GSO/NETIF_F

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Message-ID: <BANLkTikQnhwL8knodrUT940onp8DjGXVGw@mail.gmail.com>
Date:	Tue, 17 May 2011 10:15:07 +0200
From:	Michał Mirosław <mirqus@...il.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	Shan Wei <shanwei@...fujitsu.com>,
	Michał Mirosław <mirq-linux@...e.qmqm.pl>,
	netdev@...r.kernel.org, Ben Hutchings <bhutchings@...arflare.com>
Subject: Re: tap/bridge: Dropping NETIF_F_GSO/NETIF_F_SG

W dniu 17 maja 2011 10:08 użytkownik Michał Mirosław <mirqus@...il.com> napisał:
> In the tun/tap case, by using TUNSETOFFLOAD userspace advertises that
> it is willing to receive unchecksummed/TSOed packets from kernel (it
> should use TUN_VNET_HDR for this to work correctly unless it doesn't
> forward the packets). After the conversion, those offloads can be
> disabled by using ethtool even if userspace does support them.
> Previously you were able to push offloaded packets to apllications not
> prepared for them.

And there is a bug in the logic implementing this. I'll send a fix in a minute.

Best Regards,
Michał Mirosław
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