tests: test rx recovery from cont

Rx should be recovered after cont.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-id: 1437117954-16342-2-git-send-email-jasowang@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

tests/virtio-net-test.c

@@ -140,6 +140,49 @@ static void tx_test(const QVirtioBus *bus, QVirtioDevice *dev,
     g_assert_cmpstr(buffer, ==, "TEST");
 }
 
+static void rx_stop_cont_test(const QVirtioBus *bus, QVirtioDevice *dev,
+                              QGuestAllocator *alloc, QVirtQueue *vq,
+                              int socket)
+{
+    uint64_t req_addr;
+    uint32_t free_head;
+    char test[] = "TEST";
+    char buffer[64];
+    int len = htonl(sizeof(test));
+    struct iovec iov[] = {
+        {
+            .iov_base = &len,
+            .iov_len = sizeof(len),
+        }, {
+            .iov_base = test,
+            .iov_len = sizeof(test),
+        },
+    };
+    int ret;
+
+    req_addr = guest_alloc(alloc, 64);
+
+    free_head = qvirtqueue_add(vq, req_addr, 64, true, false);
+    qvirtqueue_kick(bus, dev, vq, free_head);
+
+    qmp("{ 'execute' : 'stop'}");
+
+    ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
+    g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
+
+    /* We could check the status, but this command is more importantly to
+     * ensure the packet data gets queued in QEMU, before we do 'cont'.
+     */
+    qmp("{ 'execute' : 'query-status'}");
+    qmp("{ 'execute' : 'cont'}");
+
+    qvirtio_wait_queue_isr(bus, dev, vq, QVIRTIO_NET_TIMEOUT_US);
+    memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
+    g_assert_cmpstr(buffer, ==, "TEST");
+
+    guest_free(alloc, req_addr);
+}
+
 static void send_recv_test(const QVirtioBus *bus, QVirtioDevice *dev,
                            QGuestAllocator *alloc, QVirtQueue *rvq,
                            QVirtQueue *tvq, int socket)
@@ -148,6 +191,13 @@ static void send_recv_test(const QVirtioBus *bus, QVirtioDevice *dev,
     tx_test(bus, dev, alloc, tvq, socket);
 }
 
+static void stop_cont_test(const QVirtioBus *bus, QVirtioDevice *dev,
+                           QGuestAllocator *alloc, QVirtQueue *rvq,
+                           QVirtQueue *tvq, int socket)
+{
+    rx_stop_cont_test(bus, dev, alloc, rvq, socket);
+}
+
 static void pci_basic(gconstpointer data)
 {
     QVirtioPCIDevice *dev;
@@ -205,6 +255,8 @@ int main(int argc, char **argv)
     g_test_init(&argc, &argv, NULL);
 #ifndef _WIN32
     qtest_add_data_func("/virtio/net/pci/basic", send_recv_test, pci_basic);
+    qtest_add_data_func("/virtio/net/pci/rx_stop_cont",
+                        stop_cont_test, pci_basic);
 #endif
     qtest_add_func("/virtio/net/pci/hotplug", hotplug);