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[bpf-next,12/13] libbpf: add __arg_xxx macros for annotating global func args

Message ID 20231204233931.49758-13-andrii@kernel.org (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series Enhance BPF global subprogs with argument tags | expand

Checks

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bpf/vmtest-bpf-next-PR success PR summary
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netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/cc_maintainers warning 8 maintainers not CCed: haoluo@google.com jolsa@kernel.org kpsingh@kernel.org john.fastabend@gmail.com martin.lau@linux.dev song@kernel.org sdf@google.com yonghong.song@linux.dev
netdev/build_clang success Errors and warnings before: 8 this patch: 8
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netdev/source_inline success Was 0 now: 0

Commit Message

Andrii Nakryiko Dec. 4, 2023, 11:39 p.m. UTC 
Add a set of __arg_xxx macros which can be used to augment BPF global
subprogs/functions with extra information for use by BPF verifier.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
 tools/lib/bpf/bpf_helpers.h | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h
index 77ceea575dc7..6e3f24f569b7 100644
--- a/tools/lib/bpf/bpf_helpers.h
+++ b/tools/lib/bpf/bpf_helpers.h
@@ -188,6 +188,15 @@  enum libbpf_tristate {
 	!!sym;											\
 })
 
+#define __arg_nonnull __attribute((btf_decl_tag("arg:nonnull")))
+
+#define __arg_ctx __attribute__((btf_decl_tag("arg:ctx")))
+#define __arg_dynptr __attribute__((btf_decl_tag("arg:dynptr")))
+
+#define __arg_pkt_meta __attribute__((btf_decl_tag("arg:pkt_meta")))
+#define __arg_pkt_data __attribute__((btf_decl_tag("arg:pkt_data")))
+#define __arg_pkt_end __attribute__((btf_decl_tag("arg:pkt_end")))
+
 #ifndef ___bpf_concat
 #define ___bpf_concat(a, b) a ## b
 #endif