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libbpf: Add kptr type tag macros to bpf_helpers.h

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Include convenience definitions:
__kptr:	Unreferenced kptr
__kptr_ref: Referenced kptr

Users can use them to tag the pointer type meant to be used with the new
support directly in the map value definition.

Signed-off-by: Kumar Kartikeya Dwivedi <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Kumar Kartikeya Dwivedi authored and Alexei Starovoitov committed 2022-04-25 20:26:44 -07:00
1 parent 2ab3b3808e
commit ef89654f2b
1 file changed
+7
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tools/lib/bpf/bpf_helpers.h
+7
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@@ -149,6 +149,13 @@ enum libbpf_tristate {
#define __kconfig __attribute__((section(".kconfig")))
#define __ksym __attribute__((section(".ksyms")))
#if __has_attribute(btf_type_tag)
#define __kptr __attribute__((btf_type_tag("kptr")))
#define __kptr_ref __attribute__((btf_type_tag("kptr_ref")))
#else
#define __kptr
#define __kptr_ref
#endif
#ifndef ___bpf_concat
#define ___bpf_concat(a, b) a ## b