[PATCH bpf-next 0/4] bpf: Support non-linear skbs for BPF_PROG_TEST_RUN

[Paul Chaignon <paul.chaignon@gmail.com>]

This patchset adds support for non-linear skbs when running tc programs
with BPF_PROG_TEST_RUN.

We've had multiple bugs in the past few years in Cilium caused by
missing calls to bpf_skb_pull_data(). Daniel suggested this new
BPF_PROG_TEST_RUN flag as a way to uncover these bugs in our BPF tests.

Paul Chaignon (4):
  bpf: Refactor cleanup of bpf_prog_test_run_skb
  bpf: Craft non-linear skbs in BPF_PROG_TEST_RUN
  selftests/bpf: Support non-linear flag in test loader
  selftests/bpf: Test direct packet access on non-linear skbs

 include/uapi/linux/bpf.h                      |   2 +
 net/bpf/test_run.c                            | 103 ++++++++++++------
 tools/include/uapi/linux/bpf.h                |   2 +
 .../bpf/progs/verifier_direct_packet_access.c |  48 ++++++++
 tools/testing/selftests/bpf/test_loader.c     |   9 +-
 5 files changed, 129 insertions(+), 35 deletions(-)

-- 
2.43.0