netdev - [PATCH net 2/2] selftests/tls: add test for poll() with data in TLS ULP

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Date:   Thu,  4 Jul 2019 14:50:37 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        alexei.starovoitov@...il.com,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
Subject: [PATCH net 2/2] selftests/tls: add test for poll() with data in TLS ULP

Add a test which checks if leftover record data in TLS
layer correctly wakes up poll().

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
---
 tools/testing/selftests/net/tls.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index 278c86134556..090fff9dbc48 100644
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -644,6 +644,32 @@ TEST_F(tls, poll_wait)
 	EXPECT_EQ(recv(self->cfd, recv_mem, send_len, MSG_WAITALL), send_len);
 }
 
+TEST_F(tls, poll_wait_split)
+{
+	struct pollfd fd = { 0, 0, 0 };
+	char send_mem[20] = {};
+	char recv_mem[15];
+
+	fd.fd = self->cfd;
+	fd.events = POLLIN;
+	/* Send 20 bytes */
+	EXPECT_EQ(send(self->fd, send_mem, sizeof(send_mem), 0),
+		  sizeof(send_mem));
+	/* Poll with inf. timeout */
+	EXPECT_EQ(poll(&fd, 1, -1), 1);
+	EXPECT_EQ(fd.revents & POLLIN, 1);
+	EXPECT_EQ(recv(self->cfd, recv_mem, sizeof(recv_mem), MSG_WAITALL),
+		  sizeof(recv_mem));
+
+	/* Now the remaining 5 bytes of record data are in TLS ULP */
+	fd.fd = self->cfd;
+	fd.events = POLLIN;
+	EXPECT_EQ(poll(&fd, 1, -1), 1);
+	EXPECT_EQ(fd.revents & POLLIN, 1);
+	EXPECT_EQ(recv(self->cfd, recv_mem, sizeof(recv_mem), 0),
+		  sizeof(send_mem) - sizeof(recv_mem));
+}
+
 TEST_F(tls, blocking)
 {
 	size_t data = 100000;
-- 
2.21.0