selftests/bpf: Test for get_socket_cookie

2018-07-31T07:33:48+00:00

Add test to use get_socket_cookie() from BPF programs of types BPF_PROG_TYPE_SOCK_OPS and BPF_PROG_TYPE_CGROUP_SOCK_ADDR. The test attaches two programs to cgroup, runs TCP server and client in the cgroup and checks that two operations are done properly on client socket when user calls connect(2): 1. In BPF_CGROUP_INET6_CONNECT socket cookie is used as the key to write new value in a map for client socket. 2. In BPF_CGROUP_SOCK_OPS (BPF_SOCK_OPS_TCP_CONNECT_CB callback) the value written in "1." is found by socket cookie, since it's the same socket, and updated. Finally the test verifies the value in the map. Signed-off-by: Andrey Ignatov Acked-by: Yonghong Song Signed-off-by: Daniel Borkmann

kernel/linux.git/tools/testing/selftests/bpf/test_socket_cookie.c, branch v4.19.237

selftests/bpf: Test for get_socket_cookie