[PATCH bpf-next 08/15] selftests/bpf: Add nolisten for network_helper_opts

[Geliang Tang]

From: Geliang Tang <tanggeli...@kylinos.cn>

This patch adds a struct member "nolisten" for network_helper_opts,
which is used to control whether to invoke listen() or not in
start_server_addr().

Also print out a warning if backlog is set for a type not support
listen for connections.

Signed-off-by: Geliang Tang <tanggeli...@kylinos.cn>
---
 tools/testing/selftests/bpf/network_helpers.c | 5 ++++-
 tools/testing/selftests/bpf/network_helpers.h | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/network_helpers.c 
b/tools/testing/selftests/bpf/network_helpers.c
index 8f39adbc2c16..f140a76d3d7f 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -109,11 +109,14 @@ int start_server_addr(int type, const struct 
sockaddr_storage *addr, socklen_t a
                goto error_close;
        }
 
-       if (type == SOCK_STREAM) {
+       if (!opts->nolisten && type == SOCK_STREAM) {
                if (listen(fd, opts->backlog ? MAX(opts->backlog, 0) : 1) < 0) {
                        log_err("Failed to listed on socket");
                        goto error_close;
                }
+       } else if (opts->backlog) {
+               log_err("Useless network helper opts: backlog %d",
+                       opts->backlog);
        }
 
        return fd;
diff --git a/tools/testing/selftests/bpf/network_helpers.h 
b/tools/testing/selftests/bpf/network_helpers.h
index ebed1fb1bd49..16f266c53b61 100644
--- a/tools/testing/selftests/bpf/network_helpers.h
+++ b/tools/testing/selftests/bpf/network_helpers.h
@@ -34,6 +34,7 @@ struct network_helper_opts {
         *      changing the "tcp_syncookies" sysctl from 1 to 2.
         */
        int backlog;
+       bool nolisten;
        int (*post_socket_cb)(int fd, void *opts);
        void *cb_opts;
 };
-- 
2.43.0