Thread (32 messages) 32 messages, 5 authors, 2015-06-01

Re: [PATCH v6 8/8] macvtap/tun: cross-endian support for little-endian hosts

From: David Gibson <hidden>
Date: 2015-05-28 05:26:14
Also in: kvm, lkml, virtualization

On Fri, Apr 24, 2015 at 02:50:36PM +0200, Greg Kurz wrote:
The VNET_LE flag was introduced to fix accesses to virtio 1.0 headers
that are always little-endian. It can also be used to handle the special
case of a legacy little-endian device implemented by a big-endian host.

Let's add a flag and ioctls for big-endian devices as well. If both flags
are set, little-endian wins.

Since this is isn't a common usecase, the feature is controlled by a kernel
config option (not set by default).

Both macvtap and tun are covered by this patch since they share the same
API with userland.

Signed-off-by: Greg Kurz <redacted>
Reviewed-by: David Gibson <redacted>

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
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