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SubjectRe: [RFC PATCH v2 3/3] test/vsock: new skbuff appending test
On Sun, Mar 26, 2023 at 01:10:16AM +0300, Arseniy Krasnov wrote:
>This adds test which checks case when data of newly received skbuff is
>appended to the last skbuff in the socket's queue. It looks like simple
>test with 'send()' and 'recv()', but internally it triggers logic which
>appends one received skbuff to another. Test checks that this feature
>works correctly.
>
>This test is actual only for virtio transport.
>
>Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
>---
> tools/testing/vsock/vsock_test.c | 90 ++++++++++++++++++++++++++++++++
> 1 file changed, 90 insertions(+)

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

>
>diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
>index 3de10dbb50f5..12b97c92fbb2 100644
>--- a/tools/testing/vsock/vsock_test.c
>+++ b/tools/testing/vsock/vsock_test.c
>@@ -968,6 +968,91 @@ static void test_seqpacket_inv_buf_server(const struct test_opts *opts)
> test_inv_buf_server(opts, false);
> }
>
>+#define HELLO_STR "HELLO"
>+#define WORLD_STR "WORLD"
>+
>+static void test_stream_virtio_skb_merge_client(const struct test_opts *opts)
>+{
>+ ssize_t res;
>+ int fd;
>+
>+ fd = vsock_stream_connect(opts->peer_cid, 1234);
>+ if (fd < 0) {
>+ perror("connect");
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ /* Send first skbuff. */
>+ res = send(fd, HELLO_STR, strlen(HELLO_STR), 0);
>+ if (res != strlen(HELLO_STR)) {
>+ fprintf(stderr, "unexpected send(2) result %zi\n", res);
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ control_writeln("SEND0");
>+ /* Peer reads part of first skbuff. */
>+ control_expectln("REPLY0");
>+
>+ /* Send second skbuff, it will be appended to the first. */
>+ res = send(fd, WORLD_STR, strlen(WORLD_STR), 0);
>+ if (res != strlen(WORLD_STR)) {
>+ fprintf(stderr, "unexpected send(2) result %zi\n", res);
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ control_writeln("SEND1");
>+ /* Peer reads merged skbuff packet. */
>+ control_expectln("REPLY1");
>+
>+ close(fd);
>+}
>+
>+static void test_stream_virtio_skb_merge_server(const struct test_opts *opts)
>+{
>+ unsigned char buf[64];
>+ ssize_t res;
>+ int fd;
>+
>+ fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
>+ if (fd < 0) {
>+ perror("accept");
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ control_expectln("SEND0");
>+
>+ /* Read skbuff partially. */
>+ res = recv(fd, buf, 2, 0);
>+ if (res != 2) {
>+ fprintf(stderr, "expected recv(2) returns 2 bytes, got %zi\n", res);
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ control_writeln("REPLY0");
>+ control_expectln("SEND1");
>+
>+ res = recv(fd, buf + 2, sizeof(buf) - 2, 0);
>+ if (res != 8) {
>+ fprintf(stderr, "expected recv(2) returns 8 bytes, got %zi\n", res);
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ res = recv(fd, buf, sizeof(buf) - 8 - 2, MSG_DONTWAIT);
>+ if (res != -1) {
>+ fprintf(stderr, "expected recv(2) failure, got %zi\n", res);
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ if (memcmp(buf, HELLO_STR WORLD_STR, strlen(HELLO_STR WORLD_STR))) {
>+ fprintf(stderr, "pattern mismatch\n");
>+ exit(EXIT_FAILURE);
>+ }
>+
>+ control_writeln("REPLY1");
>+
>+ close(fd);
>+}
>+
> static struct test_case test_cases[] = {
> {
> .name = "SOCK_STREAM connection reset",
>@@ -1038,6 +1123,11 @@ static struct test_case test_cases[] = {
> .run_client = test_seqpacket_inv_buf_client,
> .run_server = test_seqpacket_inv_buf_server,
> },
>+ {
>+ .name = "SOCK_STREAM virtio skb merge",
>+ .run_client = test_stream_virtio_skb_merge_client,
>+ .run_server = test_stream_virtio_skb_merge_server,
>+ },
> {},
> };
>
>--
>2.25.1
>

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