This adds test to check, that when poll() returns POLLIN and
POLLRDNORM bits, next read call won't block.

Signed-off-by: Arseniy Krasnov <redacted>
---
tools/testing/vsock/vsock_test.c | 90 ++++++++++++++++++++++++++++++++
1 file changed, 90 insertions(+)

diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
index dc577461afc2..8e394443eaf6 100644
--- a/tools/testing/vsock/vsock_test.c
+++ b/tools/testing/vsock/vsock_test.c

@@ -18,6 +18,7 @@

#include <sys/socket.h>
#include <time.h>
#include <sys/mman.h>
+#include <poll.h>

#include "timeout.h"
#include "control.h"

@@ -596,6 +597,90 @@ static void test_seqpacket_invalid_rec_buffer_server(const struct test_opts *opt

	close(fd);
}

+static void test_stream_poll_rcvlowat_server(const struct test_opts *opts)
+{
+#define RCVLOWAT_BUF_SIZE 128
+	int fd;
+	int i;
+
+	fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
+	if (fd < 0) {
+		perror("accept");
+		exit(EXIT_FAILURE);
+	}
+
+	/* Send 1 byte. */
+	send_byte(fd, 1, 0);
+
+	control_writeln("SRVSENT");
+
+	/* Just empirically delay value. */
+	sleep(4);