netdev - Re: [PATCH 1/4] tun: Interface to query tun/tap features.

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Message-ID: <486B0B16.10205@qualcomm.com>
Date:	Tue, 01 Jul 2008 21:59:02 -0700
From:	Max Krasnyansky <maxk@...lcomm.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
CC:	Herbert Xu <herbert@...dor.apana.org.au>, netdev@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 1/4] tun: Interface to query tun/tap features.


Rusty Russell wrote:
> The problem with introducing checksum offload and gso to tun is they
> need to set dev->features to enable GSO and/or checksumming, which is
> supposed to be done before register_netdevice(), ie. as part of
> TUNSETIFF.
> 
> Unfortunately, TUNSETIFF has always just ignored flags it doesn't
> understand, so there's no good way of detecting whether the kernel
> supports new IFF_ flags.
> 
> This patch implements a TUNGETFEATURES ioctl which returns all the valid IFF
> flags.  It could be extended later to include other features.

<snip>

Looks good.

Dave, do you want me to put all outstanding TUN patches into a git tree so
that you can pull them in one shot ?
Otherwise if you're ok with applying them one by one please apply this one.

Acked-by: Max Krasnyansky <maxk@...lcomm.com>
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