[PATCH bpf-next 5/6] selftests/bpf: Use start_server_addr in sockopt_inherit

[Geliang Tang]

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

Include network_helpers.h in prog_tests/sockopt_inherit.c, use public
helper start_server_addr() instead of the local defined function
start_server(). This can avoid duplicate code.

Add a helper setsockopt_custom() to set SOL_CUSTOM sockopt looply, set
it to setsockopt pointer of struct network_helper_opts, and pass it to
start_server_addr().

Signed-off-by: Geliang Tang <tanggeli...@kylinos.cn>
---
 .../bpf/prog_tests/sockopt_inherit.c          | 34 +++++++------------
 1 file changed, 13 insertions(+), 21 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/sockopt_inherit.c 
b/tools/testing/selftests/bpf/prog_tests/sockopt_inherit.c
index 917f486db826..31cf7e9075da 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockopt_inherit.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockopt_inherit.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
 #include "cgroup_helpers.h"
+#include "network_helpers.h"
 
 #include "sockopt_inherit.skel.h"
 
@@ -98,23 +99,12 @@ static void *server_thread(void *arg)
        return (void *)(long)err;
 }
 
-static int start_server(void)
+static int setsockopt_custom(int fd, const void *optval, socklen_t optlen)
 {
-       struct sockaddr_in addr = {
-               .sin_family = AF_INET,
-               .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
-       };
        char buf;
        int err;
-       int fd;
        int i;
 
-       fd = socket(AF_INET, SOCK_STREAM, 0);
-       if (fd < 0) {
-               log_err("Failed to create server socket");
-               return -1;
-       }
-
        for (i = CUSTOM_INHERIT1; i <= CUSTOM_LISTENER; i++) {
                buf = 0x01;
                err = setsockopt(fd, SOL_CUSTOM, i, &buf, 1);
@@ -125,20 +115,21 @@ static int start_server(void)
                }
        }
 
-       if (bind(fd, (const struct sockaddr *)&addr, sizeof(addr)) < 0) {
-               log_err("Failed to bind socket");
-               close(fd);
-               return -1;
-       }
-
-       return fd;
+       return 0;
 }
 
 static void run_test(int cgroup_fd)
 {
        struct bpf_link *link_getsockopt = NULL;
        struct bpf_link *link_setsockopt = NULL;
+       struct network_helper_opts opts = {
+               .setsockopt = setsockopt_custom,
+       };
        int server_fd = -1, client_fd;
+       struct sockaddr_in addr = {
+               .sin_family = AF_INET,
+               .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
+       };
        struct sockopt_inherit *obj;
        void *server_err;
        pthread_t tid;
@@ -160,8 +151,9 @@ static void run_test(int cgroup_fd)
        if (!ASSERT_OK_PTR(link_setsockopt, "cg-attach-setsockopt"))
                goto close_bpf_object;
 
-       server_fd = start_server();
-       if (!ASSERT_GE(server_fd, 0, "start_server"))
+       server_fd = start_server_addr(SOCK_STREAM, (struct sockaddr_storage 
*)&addr,
+                                     sizeof(addr), &opts);
+       if (!ASSERT_GE(server_fd, 0, "start_server_addr"))
                goto close_bpf_object;
 
        pthread_mutex_lock(&server_started_mtx);
-- 
2.40.1