selftests/bpf: test_sockmap, join cgroup in selftest mode

In case of selftest mode, temporary cgroup environment is created but
cgroup is not joined. It causes test failures. Fixed by joining the
cgroup

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7b2008a144cb38d41919934e143e885a4f38da5a..7f9ca79aadbccb7204be80f7f2192828fedf9c4b 100644 (file)
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -1344,6 +1344,11 @@ static int __test_suite(char *bpf_file)
                return cg_fd;
        }
 
+       if (join_cgroup(CG_PATH)) {
+               fprintf(stderr, "ERROR: failed to join cgroup\n");
+               return -EINVAL;
+       }
+
        /* Tests basic commands and APIs with range of iov values */
        txmsg_start = txmsg_end = 0;
        err = test_txmsg(cg_fd);