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This patch tests storing the task's related info into the bpf_sk_storage by fentry/fexit tracing at listen, accept, and connect. It also tests the raw_tp at inet_sock_set_state. A negative test is done by tracing the bpf_sk_storage_free() and using bpf_sk_storage_get() at the same time. It ensures this bpf program cannot load. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201112211320.2587537-1-kafai@fb.com