Re: [PATCH bpf-next v5 5/9] bpf: selftests: Add verifier tests for CO-RE bitfield writes

Martin KaFai Lau <martin.lau@xxxxxxxxx> · Wed, 13 Dec 2023 15:58:39 -0800

On 12/11/23 12:20 PM, Daniel Xu wrote:
Add some tests that exercise BPF_CORE_WRITE_BITFIELD() macro. Since some
non-trivial bit fiddling is going on, make sure various edge cases (such
as adjacent bitfields and bitfields at the edge of structs) are
exercised.

Hi DanielXu, I have pushed the libbpf changes (adding BPF_CORE_WRITE_BITFIELD) 
and verifier test in patch 3-5 which is useful by itself. e.g. Another patchset 
can start using it also: 
https://lore.kernel.org/bpf/8fccb066-6d17-4fa8-ba67-287042046ea4@xxxxxxxxx/

Thanks.