bpf: selftests: test_tunnel: Use vmlinux.h declarations

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vmlinux.h declarations are more ergnomic, especially when working with
kfuncs. The uapi headers are often incomplete for kfunc definitions.

This commit also switches bitfield accesses to use CO-RE helpers.
Switching to vmlinux.h definitions makes the verifier very
unhappy with raw bitfield accesses. The error is:

    ; md.u.md2.dir = direction;
    33: (69) r1 = *(u16 *)(r2 +11)
    misaligned stack access off (0x0; 0x0)+-64+11 size 2

Fix by using CO-RE-aware bitfield reads and writes.

Co-developed-by: Antony Antony <antony.antony@secunet.com>
Signed-off-by: Antony Antony <antony.antony@secunet.com>
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Link: https://lore.kernel.org/r/884bde1d9a351d126a3923886b945ea6b1b0776b.1702593901.git.dxu@dxuuu.xyz
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Daniel Xu 2023-12-14 15:49:04 -07:00 • committed by Alexei Starovoitov

parent 77a7a8220f

commit 02b4e126e6

2 changed files with 22 additions and 55 deletions

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1

tools/testing/selftests/bpf/progs/bpf_tracing_net.h

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76

tools/testing/selftests/bpf/progs/test_tunnel_kern.c

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