search for: csumed

We drop csumed packet when do XDP for packets. This breaks XDP_PASS when GUEST_CSUM is supported. Fix this by allowing csum flag to be set. With this patch, simple TCP works for XDP_PASS. Cc: John Fastabend <john.r.fastabend at intel.com> Signed-off-by: Jason Wang <jasowang at redhat.com> --- driver...

We don't disable VIRTIO_NET_F_GUEST_CSUM if XDP was set. This means we can receive partial csumed packets with metadata kept in the vnet_hdr. This may have several side effects: - It could be overridden by header adjustment, thus is might be not correct after XDP processing. - There's no way to pass such metadata information through XDP_REDIRECT to another driver. - XDP does not suppor...

We don't disable VIRTIO_NET_F_GUEST_CSUM if XDP was set. This means we can receive partial csumed packets with metadata kept in the vnet_hdr. This may have several side effects: - It could be overridden by header adjustment, thus is might be not correct after XDP processing. - There's no way to pass such metadata information through XDP_REDIRECT to another driver. - XDP does not suppor...

...ed, Jun 28, 2017 at 10:14:34AM +0800, Jason Wang wrote: > > > > > > > On 2017?06?28? 10:02, Michael S. Tsirkin wrote: > > > > > > > > On Wed, Jun 28, 2017 at 09:54:03AM +0800, Jason Wang wrote: > > > > > > > > > We should allow csumed packet for small buffer, otherwise XDP_PASS > > > > > > > > > won't work correctly. > > > > > > > > > > > > > > > > > > Fixes commit bb91accf2733 ("virtio-net: XDP support for small buffers") > > &...

...ed, Jun 28, 2017 at 10:14:34AM +0800, Jason Wang wrote: > > > > > > > On 2017?06?28? 10:02, Michael S. Tsirkin wrote: > > > > > > > > On Wed, Jun 28, 2017 at 09:54:03AM +0800, Jason Wang wrote: > > > > > > > > > We should allow csumed packet for small buffer, otherwise XDP_PASS > > > > > > > > > won't work correctly. > > > > > > > > > > > > > > > > > > Fixes commit bb91accf2733 ("virtio-net: XDP support for small buffers") > > &...

Merry Xmas and a Happy New year to all: This series tries to fixes several issues for virtio-net XDP which could be categorized into several parts: - fix several issues during XDP linearizing - allow csumed packet to work for XDP_PASS - make EWMA rxbuf size estimation works for XDP - forbid XDP when GUEST_UFO is support - remove big packet XDP support - add XDP support or small buffer Please see individual patches for details. Thanks Jason Wang (9): virtio-net: remove the warning before XDP linea...

Merry Xmas and a Happy New year to all: This series tries to fixes several issues for virtio-net XDP which could be categorized into several parts: - fix several issues during XDP linearizing - allow csumed packet to work for XDP_PASS - make EWMA rxbuf size estimation works for XDP - forbid XDP when GUEST_UFO is support - remove big packet XDP support - add XDP support or small buffer Please see individual patches for details. Thanks Jason Wang (9): virtio-net: remove the warning before XDP linea...

On 16-12-23 06:37 AM, Jason Wang wrote: > Merry Xmas and a Happy New year to all: > > This series tries to fixes several issues for virtio-net XDP which > could be categorized into several parts: > > - fix several issues during XDP linearizing > - allow csumed packet to work for XDP_PASS > - make EWMA rxbuf size estimation works for XDP > - forbid XDP when GUEST_UFO is support > - remove big packet XDP support > - add XDP support or small buffer > > Please see individual patches for details. > > Thanks > > Jason Wang (9):...

...> On Wed, Jun 28, 2017 at 10:14:34AM +0800, Jason Wang wrote: >>>>>>>> On 2017?06?28? 10:02, Michael S. Tsirkin wrote: >>>>>>>>> On Wed, Jun 28, 2017 at 09:54:03AM +0800, Jason Wang wrote: >>>>>>>>>> We should allow csumed packet for small buffer, otherwise XDP_PASS >>>>>>>>>> won't work correctly. >>>>>>>>>> >>>>>>>>>> Fixes commit bb91accf2733 ("virtio-net: XDP support for small buffers") >>>>>>...

We don't support partial csumed packet since its metadata will be lost or incorrect during XDP processing. So fail the XDP set if guest_csum feature is negotiated. Fixes: f600b6905015 ("virtio_net: Add XDP support") Reported-by: Jesper Dangaard Brouer <brouer at redhat.com> Cc: Jesper Dangaard Brouer <brouer a...

From: Jason Wang <jasowang at redhat.com> Date: Thu, 22 Nov 2018 14:36:30 +0800 > We don't disable VIRTIO_NET_F_GUEST_CSUM if XDP was set. This means we > can receive partial csumed packets with metadata kept in the > vnet_hdr. This may have several side effects: > > - It could be overridden by header adjustment, thus is might be not > correct after XDP processing. > - There's no way to pass such metadata information through > XDP_REDIRECT to another...

On Wed, Jul 19, 2017 at 04:54:49PM +0800, Jason Wang wrote: > Current XDP implementation wants guest offloads feature to be disabled > on device. This is inconvenient and means guest can't benefit from > offloads if XDP is not used. This patch tries to address this > limitation by disabling the offloads on demand through control guest > offloads. Guest offloads will be disabled

On Wed, Jul 19, 2017 at 04:54:49PM +0800, Jason Wang wrote: > Current XDP implementation wants guest offloads feature to be disabled > on device. This is inconvenient and means guest can't benefit from > offloads if XDP is not used. This patch tries to address this > limitation by disabling the offloads on demand through control guest > offloads. Guest offloads will be disabled