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bpf: add btf pointer to struct bpf_ctx_arg_aux.

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Enable the providers to use types defined in a module instead of in the
kernel (btf_vmlinux).

Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Link: https://lore.kernel.org/r/20240209023750.1153905-2-thinker.li@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Kui-Feng Lee 2024-02-08 18:37:47 -08:00 committed by Martin KaFai Lau
parent dc8543b597
commit 77c0208e19
2 changed files with 2 additions and 1 deletions
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1
include/linux/bpf.h
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@ -1415,6 +1415,7 @@ struct bpf_jit_poke_descriptor {
struct bpf_ctx_arg_aux {
u32 offset;
enum bpf_reg_type reg_type;
struct btf *btf;
u32 btf_id;
};

2
kernel/bpf/btf.c
View file

@ -6266,7 +6266,7 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type,
}
info->reg_type = ctx_arg_info->reg_type;
info->btf = btf_vmlinux;
info->btf = ctx_arg_info->btf ? : btf_vmlinux;
info->btf_id = ctx_arg_info->btf_id;
return true;
}