[v4,net-next,0/3] add multi-buff support for xdp running in generic mode

Message

Lorenzo Bianconi Dec. 12, 2023, 10:06 a.m. UTC

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 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   |   2 +-
 net/core/dev.c                  | 165 ++++++++++++++++++++++++++++----
 net/core/skbuff.c               |   5 +-
 6 files changed, 160 insertions(+), 24 deletions(-)