libbpf: Support guessing post_bind{4,6} progs (81efee75) · Commits · 戴 / test

libbpf can guess prog type and expected attach type based on section name. Add hints for "cgroup/post_bind4" and "cgroup/post_bind6" section names. Existing "cgroup/sock" is not changed, i.e. expected_attach_type for it is not set to `BPF_CGROUP_INET_SOCK_CREATE`, for backward compatibility. Signed-off-by:

Andrey Ignatov <rdna@fb.com> Signed-off-by:

Daniel Borkmann <daniel@iogearbox.net>

tools/lib/bpf/libbpf.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -1859,6 +1859,9 @@ static void bpf_program__set_expected_attach_type(struct bpf_program *prog,

		#define BPF_PROG_SEC(string, ptype) BPF_PROG_SEC_FULL(string, ptype, 0)

		#define BPF_S_PROG_SEC(string, ptype) \
		BPF_PROG_SEC_FULL(string, BPF_PROG_TYPE_CGROUP_SOCK, ptype)

		#define BPF_SA_PROG_SEC(string, ptype) \
		BPF_PROG_SEC_FULL(string, BPF_PROG_TYPE_CGROUP_SOCK_ADDR, ptype)

		@@ -1889,10 +1892,13 @@ static const struct {
		BPF_SA_PROG_SEC("cgroup/bind6", BPF_CGROUP_INET6_BIND),
		BPF_SA_PROG_SEC("cgroup/connect4", BPF_CGROUP_INET4_CONNECT),
		BPF_SA_PROG_SEC("cgroup/connect6", BPF_CGROUP_INET6_CONNECT),
		BPF_S_PROG_SEC("cgroup/post_bind4", BPF_CGROUP_INET4_POST_BIND),
		BPF_S_PROG_SEC("cgroup/post_bind6", BPF_CGROUP_INET6_POST_BIND),
		};

		#undef BPF_PROG_SEC
		#undef BPF_PROG_SEC_FULL
		#undef BPF_S_PROG_SEC
		#undef BPF_SA_PROG_SEC

		static int bpf_program__identify_section(struct bpf_program *prog)

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