[PATCH bpf-next 0/2] bpf: Support fentry/fexit for functions with union args

[Leon Hwang <leon.hwang@xxxxxxxxx>]

While tracing 'release_pages' with bpfsnoop[0], the verifier reports:

The function release_pages arg0 type UNION is unsupported.

However, it should be acceptable to trace functions that have 'union'
arguments.

This patch set enables such support in the verifier by allowing 'union'
as a valid argument type.

Links:
[0] https://github.com/bpfsnoop/bpfsnoop

Leon Hwang (2):
  bpf: Allow tracing union-arg functions
  selftests/bpf: Add test to access union argument in tracing program

 kernel/bpf/btf.c                                   |  4 ++--
 net/bpf/test_run.c                                 | 14 +++++++++++++-
 .../selftests/bpf/progs/verifier_btf_ctx_access.c  | 12 ++++++++++++
 3 files changed, 27 insertions(+), 3 deletions(-)

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2.50.1