netdev - [bpf-next PATCH 0/3] bpf/xdp: fix generic-XDP and demonstrate VLAN manipulation

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Date:   Tue, 25 Sep 2018 16:25:44 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     netdev@...r.kernel.org, Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     Daniel Borkmann <borkmann@...earbox.net>, yoel@...knet.dk,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Subject: [bpf-next PATCH 0/3] bpf/xdp: fix generic-XDP and demonstrate VLAN
 manipulation

While implementing PoC building blocks for eBPF code XDP+TC that can
manipulate VLANs headers, I discovered a bug in generic-XDP.

The fix should be backported to stable kernels.  Even-though
generic-XDP were introduced in v4.12, I think the bug is not exposed
until v4.14 in the mentined fixes commit.

---
p.s. send from Embedded Recipes 2018 in Paris

Jesper Dangaard Brouer (3):
      net: fix generic XDP to handle if eth header was mangled
      bpf: make TC vlan bpf_helpers avail to selftests
      selftests/bpf: add XDP selftests for modifying and popping VLAN headers


 net/core/dev.c                               |   14 +
 tools/testing/selftests/bpf/Makefile         |    5 
 tools/testing/selftests/bpf/bpf_helpers.h    |    4 
 tools/testing/selftests/bpf/test_xdp_vlan.c  |  292 ++++++++++++++++++++++++++
 tools/testing/selftests/bpf/test_xdp_vlan.sh |  195 +++++++++++++++++
 5 files changed, 508 insertions(+), 2 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/test_xdp_vlan.c
 create mode 100755 tools/testing/selftests/bpf/test_xdp_vlan.sh

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