Re: [PATCH net-next v3 4/4] vsock/test: MSG_PEEK test for SOCK_SEQPACKET

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On Tue, Jul 25, 2023 at 08:29:12PM +0300, Arseniy Krasnov wrote:
This adds MSG_PEEK test for SOCK_SEQPACKET. It works in the same way as
SOCK_STREAM test, except it also tests MSG_TRUNC flag.

Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
---
tools/testing/vsock/vsock_test.c | 58 +++++++++++++++++++++++++++++---
1 file changed, 54 insertions(+), 4 deletions(-)

Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>

Thanks,
Stefano


diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
index 444a3ff0681f..90718c2fd4ea 100644
--- a/tools/testing/vsock/vsock_test.c
+++ b/tools/testing/vsock/vsock_test.c
@@ -257,14 +257,19 @@ static void test_stream_multiconn_server(const struct test_opts *opts)

#define MSG_PEEK_BUF_LEN 64

-static void test_stream_msg_peek_client(const struct test_opts *opts)
+static void test_msg_peek_client(const struct test_opts *opts,
+				 bool seqpacket)
{
	unsigned char buf[MSG_PEEK_BUF_LEN];
	ssize_t send_size;
	int fd;
	int i;

-	fd = vsock_stream_connect(opts->peer_cid, 1234);
+	if (seqpacket)
+		fd = vsock_seqpacket_connect(opts->peer_cid, 1234);
+	else
+		fd = vsock_stream_connect(opts->peer_cid, 1234);
+
	if (fd < 0) {
		perror("connect");
		exit(EXIT_FAILURE);
@@ -290,7 +295,8 @@ static void test_stream_msg_peek_client(const struct test_opts *opts)
	close(fd);
}

-static void test_stream_msg_peek_server(const struct test_opts *opts)
+static void test_msg_peek_server(const struct test_opts *opts,
+				 bool seqpacket)
{
	unsigned char buf_half[MSG_PEEK_BUF_LEN / 2];
	unsigned char buf_normal[MSG_PEEK_BUF_LEN];
@@ -298,7 +304,11 @@ static void test_stream_msg_peek_server(const struct test_opts *opts)
	ssize_t res;
	int fd;

-	fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
+	if (seqpacket)
+		fd = vsock_seqpacket_accept(VMADDR_CID_ANY, 1234, NULL);
+	else
+		fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
+
	if (fd < 0) {
		perror("accept");
		exit(EXIT_FAILURE);
@@ -340,6 +350,21 @@ static void test_stream_msg_peek_server(const struct test_opts *opts)
		exit(EXIT_FAILURE);
	}

+	if (seqpacket) {
+		/* This type of socket supports MSG_TRUNC flag,
+		 * so check it with MSG_PEEK. We must get length
+		 * of the message.
+		 */
+		res = recv(fd, buf_half, sizeof(buf_half), MSG_PEEK |
+			   MSG_TRUNC);
+		if (res != sizeof(buf_peek)) {
+			fprintf(stderr,
+				"recv(2) + MSG_PEEK | MSG_TRUNC, exp %zu, got %zi\n",
+				sizeof(buf_half), res);
+			exit(EXIT_FAILURE);
+		}
+	}
+
	res = recv(fd, buf_normal, sizeof(buf_normal), 0);
	if (res != sizeof(buf_normal)) {
		fprintf(stderr, "recv(2), expected %zu, got %zi\n",
@@ -356,6 +381,16 @@ static void test_stream_msg_peek_server(const struct test_opts *opts)
	close(fd);
}

+static void test_stream_msg_peek_client(const struct test_opts *opts)
+{
+	return test_msg_peek_client(opts, false);
+}
+
+static void test_stream_msg_peek_server(const struct test_opts *opts)
+{
+	return test_msg_peek_server(opts, false);
+}
+
#define SOCK_BUF_SIZE (2 * 1024 * 1024)
#define MAX_MSG_SIZE (32 * 1024)

@@ -1125,6 +1160,16 @@ static void test_stream_virtio_skb_merge_server(const struct test_opts *opts)
	close(fd);
}

+static void test_seqpacket_msg_peek_client(const struct test_opts *opts)
+{
+	return test_msg_peek_client(opts, true);
+}
+
+static void test_seqpacket_msg_peek_server(const struct test_opts *opts)
+{
+	return test_msg_peek_server(opts, true);
+}
+
static struct test_case test_cases[] = {
	{
		.name = "SOCK_STREAM connection reset",
@@ -1200,6 +1245,11 @@ static struct test_case test_cases[] = {
		.run_client = test_stream_virtio_skb_merge_client,
		.run_server = test_stream_virtio_skb_merge_server,
	},
+	{
+		.name = "SOCK_SEQPACKET MSG_PEEK",
+		.run_client = test_seqpacket_msg_peek_client,
+		.run_server = test_seqpacket_msg_peek_server,
+	},
	{},
};

--
2.25.1


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