Re: [PATCH bpf-next v8 09/10] selftests/bpf: Extend kfunc selftests

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On 2022-01-14 22:09 +0530, Kumar Kartikeya Dwivedi wrote:
> Use the prog_test kfuncs to test the referenced PTR_TO_BTF_ID kfunc
> support, and PTR_TO_CTX, PTR_TO_MEM argument passing support. Also
> testing the various failure cases for invalid kfunc prototypes.
> 
> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
> ---
>  net/bpf/test_run.c                            | 129 +++++++++++++++++-
>  .../selftests/bpf/prog_tests/kfunc_call.c     |   6 +
>  .../selftests/bpf/progs/kfunc_call_test.c     |  52 ++++++-
>  tools/testing/selftests/bpf/verifier/calls.c  |  75 ++++++++++
>  4 files changed, 258 insertions(+), 4 deletions(-)
> 

It looks like this patch broke building the bpf tests:

tools/testing/selftests/bpf$ make
  CLNG-BPF [test_maps] kfunc_call_test.o
progs/kfunc_call_test.c:13:46: error: declaration of 'struct prog_test_pass1' will not be visible outside of this function [-Werror,-Wvisibility]
extern void bpf_kfunc_call_test_pass1(struct prog_test_pass1 *p) __ksym;
                                             ^

The only definition of struct prog_test_pass1 that I see is in
net/bpf/test_run.c. How is this supposed to work?


commit 87091063df5d ("selftests/bpf: Add test for unstable CT lookup
API") from the same series added a similar problem in
progs/test_bpf_nf.c:

progs/test_bpf_nf.c:31:21: error: variable has incomplete type 'struct bpf_ct_opts'
        struct bpf_ct_opts opts_def = { .l4proto = IPPROTO_TCP, .netns_id = -1 };
                           ^



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