On Fri, Mar 11, 2022 at 10:55:42AM +0000, Krasnov Arseniy Vladimirovich wrote:
Test for receive timeout check: connection is established,
receiver sets timeout, but sender does nothing. Receiver's
'read()' call must return EAGAIN.

Signed-off-by: Arseniy Krasnov <avkras...@sberdevices.ru>
---
tools/testing/vsock/vsock_test.c | 49 ++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)

diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
index 2a3638c0a008..aa2de27d0f77 100644
--- a/tools/testing/vsock/vsock_test.c
+++ b/tools/testing/vsock/vsock_test.c
@@ -391,6 +391,50 @@ static void test_seqpacket_msg_trunc_server(const struct 
test_opts *opts)
        close(fd);
}

+static void test_seqpacket_timeout_client(const struct test_opts *opts)
+{
+       int fd;
+       struct timeval tv;
+       char dummy;
+
+       fd = vsock_seqpacket_connect(opts->peer_cid, 1234);
+       if (fd < 0) {
+               perror("connect");
+               exit(EXIT_FAILURE);
+       }
+
+       tv.tv_sec = 1;
+       tv.tv_usec = 0;
+
+       if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (void *)&tv, sizeof(tv)) == 
-1) {
+               perror("setsockopt 'SO_RCVTIMEO'");
+               exit(EXIT_FAILURE);
+       }
+
+       if ((read(fd, &dummy, sizeof(dummy)) != -1) ||
+           (errno != EAGAIN)) {
+               perror("EAGAIN expected");
+               exit(EXIT_FAILURE);
+       }

The patch LGTM, maybe the only thing I would add here is a check on the time spent in the read(), to see that it is approximately the timeout we have set.

Thanks,
Stefano

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