auto-test: Add a test to check for blocking poll with SIGIO being invoked

With the process now capable of getting a SIGIO on incoming data, check
if a poll() for POLLIN that was blocked behaves properly.

This checks for both, the SIGIO delivery as well as poll output.

Signed-off-by: Amit Shah <amit.shah@redhat.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/auto-virtserial.c b/auto-virtserial.c
index ccd35e9..cb3f419 100644
--- a/auto-virtserial.c
+++ b/auto-virtserial.c
@@ -1241,6 +1241,7 @@ out:
  */
 static int test_sigio_handler(int nr)
 {
+	struct guest_packet gpkt;
 	int ret, err;
 
 	guest_open_port(nr);
@@ -1316,6 +1317,42 @@ static int test_sigio_handler(int nr)
 	guest_close_port(3);
 	guest_close_port(4);
 
+	/*
+	 * Now for the poll test: poll for pollin, send data, both
+	 * sigio and pollin should get set.
+	 */
+	ret = guest_open_port(nr);
+	err = result(__func__, true, "guest open", ret, -1, -1, OP_GT, false);
+	if (err)
+		return err;
+
+	host_connect_chardev(nr);
+
+	sleep(2);
+	guest_set_poll_events(nr, POLLIN);
+
+	gpkt.key = KEY_POLL;
+	gpkt.value = -1;
+	guest_cmd_only(&gpkt);
+	sleep(2);
+
+	/* Now the guest is blocking on data from us. */
+	write(chardevs[nr].sock, &ret, sizeof(ret));
+	sleep(2);
+
+	/* Guest should have now come out of poll and also received SIGIO */
+	get_guest_response(&gpkt);
+	err = result(__func__, true, "poll", gpkt.value,
+		     POLLIN, POLLIN, OP_EQ, false);
+
+	ret = guest_get_sigio_poll_result(nr);
+	err = result(__func__, true, "poll-sigio",
+		     ret, POLLIN|POLLOUT, POLLIN|POLLOUT, OP_EQ, true);
+
+	guest_read(nr, sizeof(ret));
+	guest_close_port(nr);
+	host_close_chardev(nr);
+
 	return err;
 }