[bpf-next,2/6] selftests/bpf: Use start_server_addr in sockopt_inherit

Commit Message

Geliang Tang May 5, 2024, 11:35 a.m. UTC

From: Geliang Tang <[e-mail]>

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 custom_cb() to set SOL_CUSTOM sockopt looply, set it to
post_socket_cb pointer of struct network_helper_opts, and pass it to
start_server_addr().

Signed-off-by: Geliang Tang <[e-mail]>
---
 .../bpf/prog_tests/sockopt_inherit.c          | 32 +++++++------------
 1 file changed, 12 insertions(+), 20 deletions(-)

Comments

Martin KaFai Lau May 9, 2024, 8:51 p.m. UTC | #1

On 5/5/24 4:35 AM, Geliang Tang wrote:
> From: Geliang Tang <[e-mail]>
> 
> 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 custom_cb() to set SOL_CUSTOM sockopt looply, set it to
> post_socket_cb pointer of struct network_helper_opts, and pass it to
> start_server_addr().
> 
> Signed-off-by: Geliang Tang <[e-mail]>
> ---
>   .../bpf/prog_tests/sockopt_inherit.c          | 32 +++++++------------
>   1 file changed, 12 insertions(+), 20 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..ff0694ef5286 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 custom_cb(int fd, const struct post_socket_opts *opts)
>   {
> -	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);

There is a close(fd) on the error case a few lines below (not in this diff 
context). The caller (network_helpers.c) will also close it. I removed the 
close(fd) from the custom_cb() here.

Thanks for the patches. Applied.

> @@ -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;
>   }
>

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/sockopt_inherit.c b/tools/testing/selftests/bpf/prog_tests/sockopt_inherit.c
index 917f486db826..ff0694ef5286 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 custom_cb(int fd, const struct post_socket_opts *opts)
 {
-	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 = {
+		.post_socket_cb = custom_cb,
+	};
 	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;
@@ -160,7 +151,8 @@  static void run_test(int cgroup_fd)
 	if (!ASSERT_OK_PTR(link_setsockopt, "cg-attach-setsockopt"))
 		goto close_bpf_object;
 
-	server_fd = start_server();
+	server_fd = start_server_addr(SOCK_STREAM, (struct sockaddr_storage *)&addr,
+				      sizeof(addr), &opts);
 	if (!ASSERT_GE(server_fd, 0, "start_server"))
 		goto close_bpf_object;