tests: add specialized device_find function

Allow specifying which slot to look for the device.

This will be used in the following patch to avoid leaking when multiple
devices exists and we want to lookup the hotplug one.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

2 files changed, 27 insertions, 6 deletions

diff --git a/tests/libqos/virtio-pci.c b/tests/libqos/virtio-pci.c
index 456cccdc7b..808365e8ca 100644
--- a/tests/libqos/virtio-pci.c
+++ b/tests/libqos/virtio-pci.c
@@ -24,6 +24,8 @@
 typedef struct QVirtioPCIForeachData {
     void (*func)(QVirtioDevice *d, void *data);
     uint16_t device_type;
+    bool has_slot;
+    int slot;
     void *user_data;
 } QVirtioPCIForeachData;
 
@@ -55,7 +57,8 @@ static void qvirtio_pci_foreach_callback(
     QVirtioPCIForeachData *d = data;
     QVirtioPCIDevice *vpcidev = qpcidevice_to_qvirtiodevice(dev);
 
-    if (vpcidev->vdev.device_type == d->device_type) {
+    if (vpcidev->vdev.device_type == d->device_type &&
+        (!d->has_slot || vpcidev->pdev->devfn == d->slot << 3)) {
         d->func(&vpcidev->vdev, d->user_data);
     } else {
         g_free(vpcidev);
@@ -290,21 +293,39 @@ const QVirtioBus qvirtio_pci = {
     .virtqueue_kick = qvirtio_pci_virtqueue_kick,
 };
 
-void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
+static void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
+                bool has_slot, int slot,
                 void (*func)(QVirtioDevice *d, void *data), void *data)
 {
     QVirtioPCIForeachData d = { .func = func,
                                 .device_type = device_type,
+                                .has_slot = has_slot,
+                                .slot = slot,
                                 .user_data = data };
 
     qpci_device_foreach(bus, PCI_VENDOR_ID_REDHAT_QUMRANET, -1,
-                                qvirtio_pci_foreach_callback, &d);
+                        qvirtio_pci_foreach_callback, &d);
 }
 
 QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type)
 {
     QVirtioPCIDevice *dev = NULL;
-    qvirtio_pci_foreach(bus, device_type, qvirtio_pci_assign_device, &dev);
+
+    qvirtio_pci_foreach(bus, device_type, false, 0,
+                        qvirtio_pci_assign_device, &dev);
+
+    dev->vdev.bus = &qvirtio_pci;
+
+    return dev;
+}
+
+QVirtioPCIDevice *qvirtio_pci_device_find_slot(QPCIBus *bus,
+                                               uint16_t device_type, int slot)
+{
+    QVirtioPCIDevice *dev = NULL;
+
+    qvirtio_pci_foreach(bus, device_type, true, slot,
+                        qvirtio_pci_assign_device, &dev);
 
     dev->vdev.bus = &qvirtio_pci;
 
diff --git a/tests/libqos/virtio-pci.h b/tests/libqos/virtio-pci.h
index 0fab916cf8..6ef19094cb 100644
--- a/tests/libqos/virtio-pci.h
+++ b/tests/libqos/virtio-pci.h
@@ -31,9 +31,9 @@ typedef struct QVirtQueuePCI {
 
 extern const QVirtioBus qvirtio_pci;
 
-void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
-                void (*func)(QVirtioDevice *d, void *data), void *data);
 QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type);
+QVirtioPCIDevice *qvirtio_pci_device_find_slot(QPCIBus *bus,
+                                               uint16_t device_type, int slot);
 void qvirtio_pci_device_free(QVirtioPCIDevice *dev);
 
 void qvirtio_pci_device_enable(QVirtioPCIDevice *d);