tcp and udp bpf_iter can reuse some socket ids in
btf_sock_ids, so make it global.
I put the extern definition in btf_ids.h as a central
place so it can be easily discovered by developers.
Change-Id: Ic07e0b3e0c6ddf7c9b1a910547343b57d0ff5153
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200720163402.1393427-1-yhs@fb.com
Signed-off-by: Sorayukii <sorayukii69@gmail.com>
538740705d