[PATCH v4 bpf-next 0/3] introduce xdp frags support to veth driver

[Lorenzo Bianconi <lorenzo@kernel.org>]

Introduce xdp frags support to veth driver in order to allow increasing the mtu
over the page boundary if the attached xdp program declares to support xdp
fragments. Enable NETIF_F_ALL_TSO when the device is running in xdp mode.
This series has been tested running xdp_router_ipv4 sample available in the
kernel tree redirecting tcp traffic from veth pair into the mvneta driver.

Changes since v3:
- introduce a check on max_mtu for xdp mode in veth_xdp_set()
Changes since v2:
- move rcu_access_pointer() check in veth_skb_is_eligible_for_gro

Changes since v1:
- always consider skb paged are non-writable
- fix tpt issue with sctp
- always use napi if we are running in xdp mode in veth_xmit

Lorenzo Bianconi (3):
  net: veth: account total xdp_frame len running ndo_xdp_xmit
  veth: rework veth_xdp_rcv_skb in order to accept non-linear skb
  veth: allow jumbo frames in xdp mode

 drivers/net/veth.c | 206 ++++++++++++++++++++++++++++++---------------
 include/net/xdp.h  |  14 +++
 net/core/xdp.c     |   1 +
 3 files changed, 152 insertions(+), 69 deletions(-)

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2.35.1