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[bpf-next,v2,24/25] selftests/bpf: Add __contains macro to bpf_experimental.h

Message ID 20221013062303.896469-25-memxor@gmail.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series Local kptrs, BPF linked lists | expand

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netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit fail Errors and warnings before: 1376 this patch: 1363
netdev/cc_maintainers warning 11 maintainers not CCed: sdf@google.com john.fastabend@gmail.com yhs@fb.com haoluo@google.com linux-kselftest@vger.kernel.org jolsa@kernel.org kpsingh@kernel.org song@kernel.org shuah@kernel.org mykolal@fb.com martin.lau@linux.dev
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netdev/check_selftest success No net selftest shell script
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Commit Message

Kumar Kartikeya Dwivedi Oct. 13, 2022, 6:23 a.m. UTC 
Add user facing __contains macro which provides a convenient wrapper
over the verbose kernel specific BTF declaration tag required to
annotate BPF list head structs in user types.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
 tools/testing/selftests/bpf/bpf_experimental.h | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h
index 21b85cd721cb..dc71b58b123c 100644
--- a/tools/testing/selftests/bpf/bpf_experimental.h
+++ b/tools/testing/selftests/bpf/bpf_experimental.h
@@ -5,6 +5,8 @@ 
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_core_read.h>
 
+#define __contains(name, node) __attribute__((btf_decl_tag("contains:struct:" #name ":" #node)))
+
 #else
 
 struct bpf_list_head {