[PATCH v5 net-next 0/3] add multi-buff support for xdp running in generic mode

[Lorenzo Bianconi <lorenzo@kernel.org>]

Introduce multi-buffer support for xdp running in generic mode not always
linearizing the skb in netif_receive_generic_xdp routine.
Introduce page_pool in softnet_data structure

Changes since v4:
- fix compilation error if page_pools are not enabled
Changes since v3:
- introduce page_pool in softnet_data structure
- rely on page_pools for xdp_generic code
Changes since v2:
- rely on napi_alloc_frag() and napi_build_skb() to build the new skb
Changes since v1:
- explicitly keep the skb segmented in netif_skb_check_for_generic_xdp() and
  do not rely on pskb_expand_head()

Lorenzo Bianconi (3):
  net: introduce page_pool pointer in softnet_data percpu struct
  xdp: rely on skb pointer reference in do_xdp_generic and
    netif_receive_generic_xdp
  xdp: add multi-buff support for xdp running in generic mode

 drivers/net/tun.c               |   4 +-
 include/linux/netdevice.h       |   3 +-
 include/net/page_pool/helpers.h |   5 +
 include/net/page_pool/types.h   |   1 +
 net/core/dev.c                  | 208 +++++++++++++++++++++++++++-----
 net/core/page_pool.c            |   5 +
 net/core/skbuff.c               |   5 +-
 7 files changed, 199 insertions(+), 32 deletions(-)

-- 
2.43.0