linux-kernel - [RFC v3 -next 0/2] virtio-net: Advised MTU feature

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Message-Id: <1459539136-13948-1-git-send-email-aconole@redhat.com>
Date:	Fri,  1 Apr 2016 15:32:14 -0400
From:	Aaron Conole <aconole@...hat.com>
To:	netdev@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Pankaj Gupta <pagupta@...hat.com>
Subject: [RFC v3 -next 0/2] virtio-net: Advised MTU feature

The following series adds the ability for a hypervisor to set an MTU on the
guest during feature negotiation phase. This is useful for VM orchestration
when, for instance, tunneling is involved and the MTU of the various systems
should be homogenous.

The first patch adds the feature bit as described in the proposed VIRTIO spec
addition found at
https://lists.oasis-open.org/archives/virtio-dev/201603/msg00001.html
The second patch adds a user of the bit, and a warning when the guest changes
the MTU from the hypervisor advised MTU. Future patches may add more thorough
error handling.

v2:
* Whitespace and code style cleanups from Sergei Shtylyov and Paolo Abeni
* Additional test before printing a warning

v3:
* Removed the warning when changing MTU (which simplified the code)

Aaron Conole (2):
  virtio: Start feature MTU support
  virtio_net: Read the advised MTU

 drivers/net/virtio_net.c        | 8 ++++++++
 include/uapi/linux/virtio_net.h | 3 +++
 2 files changed, 11 insertions(+)

-- 
2.5.5