netdev - Re: [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function

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Date:   Tue, 30 Mar 2021 10:43:01 +0100
From:   Lorenz Bauer <lmb@...udflare.com>
To:     Martin KaFai Lau <kafai@...com>
Cc:     bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <kernel-team@...com>,
        Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function

On Thu, 25 Mar 2021 at 01:52, Martin KaFai Lau <kafai@...com> wrote:
>
> This series adds support to allow bpf program calling kernel function.

I think there are more build problems with this. Has anyone hit this before?

$ CLANG=clang-12 O=../kbuild/vm ./tools/testing/selftests/bpf/vmtest.sh -j 7

  GEN-SKEL [test_progs-no_alu32] bind6_prog.skel.h
libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1
  GEN-SKEL [test_progs-no_alu32] bind_perm.skel.h
libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1
  GEN-SKEL [test_progs-no_alu32] bpf_cubic.skel.h
  GEN-SKEL [test_progs-no_alu32] bpf_dctcp.skel.h
  GEN-SKEL [test_progs-no_alu32] bpf_flow.skel.h
libbpf: failed to find BTF for extern 'tcp_cong_avoid_ai' [27] section: -2
Error: failed to open BPF object file: No such file or directory
make: *** [Makefile:453:
/home/lorenz/dev/kbuild/vm//no_alu32/bpf_cubic.skel.h] Error 255
make: *** Deleting file '/home/lorenz/dev/kbuild/vm//no_alu32/bpf_cubic.skel.h'
make: *** Waiting for unfinished jobs....
libbpf: failed to find BTF for extern 'tcp_reno_cong_avoid' [38] section: -2
Error: failed to open BPF object file: No such file or directory
make: *** [Makefile:451:
/home/lorenz/dev/kbuild/vm//no_alu32/bpf_dctcp.skel.h] Error 255
make: *** Deleting file '/home/lorenz/dev/kbuild/vm//no_alu32/bpf_dctcp.skel.h'

-- 
Lorenz Bauer  |  Systems Engineer
6th Floor, County Hall/The Riverside Building, SE1 7PB, UK

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