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由 Hou Tao 提交于
Factor out two helpers to check the read access of ctx for raw tp and BTF function. bpf_tracing_ctx_access() is used to check the read access to argument is valid, and bpf_tracing_btf_ctx_access() checks whether the btf type of argument is valid besides the checking of argument read. bpf_tracing_btf_ctx_access() will be used by the following patch. Signed-off-by: NHou Tao <houtao1@huawei.com> Signed-off-by: NAlexei Starovoitov <ast@kernel.org> Acked-by: NMartin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20211025064025.2567443-3-houtao1@huawei.com
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