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[net-next,v5,0/3] virtio_net: add optional flow dissection in virtio_net_hdr_to_skb

Message ID 20210610183853.3530712-1-tannerlove.kernel@gmail.com
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Series virtio_net: add optional flow dissection in virtio_net_hdr_to_skb | expand

Message

Tanner Love June 10, 2021, 6:38 p.m. UTC 
From: Tanner Love <tannerlove@google.com>

First patch extends the flow dissector BPF program type to accept
pointer to virtio-net header. 

Second patch uses this feature to add optional flow dissection in
virtio_net_hdr_to_skb(). This allows admins to define permitted
packets more strictly, for example dropping deprecated UDP_UFO
packets.

Third patch extends kselftest to cover this feature.

Tanner Love (3):
  net: flow_dissector: extend bpf flow dissector support with vnet hdr
  virtio_net: add optional flow dissection in virtio_net_hdr_to_skb
  selftests/net: amend bpf flow dissector prog to do vnet hdr validation

 drivers/net/bonding/bond_main.c               |   2 +-
 include/linux/skbuff.h                        |  35 ++-
 include/linux/virtio_net.h                    |  25 ++-
 include/uapi/linux/bpf.h                      |   2 +
 kernel/bpf/verifier.c                         |  50 ++++-
 net/bpf/test_run.c                            |   2 +-
 net/core/filter.c                             |  26 +++
 net/core/flow_dissector.c                     |  21 +-
 net/core/sysctl_net_core.c                    |   9 +
 tools/include/uapi/linux/bpf.h                |   2 +
 tools/testing/selftests/bpf/progs/bpf_flow.c  | 208 ++++++++++++++----
 .../selftests/bpf/test_flow_dissector.c       | 181 +++++++++++++--
 .../selftests/bpf/test_flow_dissector.sh      |  19 ++
 13 files changed, 495 insertions(+), 87 deletions(-)