[RFC PATCH net-next 0/5] XDP rx handler

From: Jason Wang
Date: Sun Aug 12 2018 - 23:05:33 EST


This series tries to implement XDP support for rx hanlder. This would
be useful for doing native XDP on stacked device like macvlan, bridge
or even bond.

The idea is simple, let stacked device register a XDP rx handler. And
when driver return XDP_PASS, it will call a new helper xdp_do_pass()
which will try to pass XDP buff to XDP rx handler directly. XDP rx
handler may then decide how to proceed, it could consume the buff, ask
driver to drop the packet or ask the driver to fallback to normal skb

A sample XDP rx handler was implemented for macvlan. And virtio-net
(mergeable buffer case) was converted to call xdp_do_pass() as an
example. For ease comparision, generic XDP support for rx handler was
also implemented.

Compared to skb mode XDP on macvlan, native XDP on macvlan (XDP_DROP)
shows about 83% improvement.

Please review.


Jason Wang (5):
net: core: generic XDP support for stacked device
net: core: introduce XDP rx handler
macvlan: count the number of vlan in source mode
macvlan: basic XDP support
virtio-net: support XDP rx handler

drivers/net/macvlan.c | 189 +++++++++++++++++++++++++++++++++++++++++++--
drivers/net/virtio_net.c | 11 +++
include/linux/filter.h | 1 +
include/linux/if_macvlan.h | 1 +
include/linux/netdevice.h | 12 +++
net/core/dev.c | 34 ++++++++
net/core/filter.c | 28 +++++++
7 files changed, 271 insertions(+), 5 deletions(-)