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# Date Author Comment
6c9f58ba 10/27/2009 07:29 pm Sridhar Samudrala

Enable UFO on virtio-net and tap devices

Enable UFO on the host tap device if supported and allow setting UFO
on virtio-net in the guest.

Signed-off-by: Sridhar Samudrala <>
Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>
b1c28b46 10/27/2009 07:29 pm Mark McLoughlin

net: add tap_set_offload()

This API allows virtio-net to enable various offload features on a
tap interface - e.g. to tell the host kernel it can pass up partial
checksums to userspace.

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>
76682299 10/27/2009 07:29 pm Mark McLoughlin

net: import linux tap ioctl definitions

Making features dependent on the availability of newer versions if_tun.h
is going to get seriously clumsy, so let's just import the definitions
we need. It's only a small handful.

If and when we're comfortable depending on 2.6.30 headers, we can remove...
8e0f8e5b 10/27/2009 07:29 pm Mark McLoughlin

net: enable IFF_VNET_HDR on tap fds if available

For now, we just add an empty header before writing and strip the header
after reading.

We really only want IFF_VNET_HDR when virtio_net is using it, but it
would significantly complicate matters to try and do that. There should...