[RFC net-next PATCH 0/5] XDP driver feature API and handling change to xdp_buff

[Jesper Dangaard Brouer <brouer@redhat.com>]

I would like some comments on introducing a feature API between XDP
drives and XDP/BPF core.  The primary issue is when extending struct
xdp_buff, today, drivers not implementing this feature can access
uninitilized memory, using bpf-helper associated with the feature.

---

Jesper Dangaard Brouer (5):
      samples/bpf: xdp_tx_iptunnel make use of map_data[]
      mlx5: fix bug reading rss_hash_type from CQE
      net: introduce XDP driver features interface
      net: new XDP feature for reading HW rxhash from drivers
      mlx5: add XDP rxhash feature for driver mlx5


 drivers/net/ethernet/mellanox/mlx5/core/en_main.c |    3 +
 drivers/net/ethernet/mellanox/mlx5/core/en_rx.c   |   98 ++++++++++++++-------
 include/linux/filter.h                            |   31 ++++++-
 include/linux/mlx5/device.h                       |   10 ++
 include/linux/netdev_features.h                   |   34 +++++++
 include/linux/netdevice.h                         |    1 
 include/uapi/linux/bpf.h                          |   56 ++++++++++++
 kernel/bpf/verifier.c                             |    3 +
 net/core/dev.c                                    |   48 ++++++++++
 net/core/ethtool.c                                |    2 
 net/core/filter.c                                 |   73 ++++++++++++++++
 samples/bpf/bpf_helpers.h                         |    2 
 samples/bpf/xdp_tx_iptunnel_common.h              |    2 
 samples/bpf/xdp_tx_iptunnel_kern.c                |    2 
 samples/bpf/xdp_tx_iptunnel_user.c                |   14 ++-
 tools/include/uapi/linux/bpf.h                    |   10 ++
 16 files changed, 345 insertions(+), 44 deletions(-)