libqos: add qvirtqueue_cleanup()

qvirtqueue_setup() allocates the vring and virtqueue state.  So far
there has been no function to free it.  Callers have been using
guest_free() for the vring but forgot to free the QVirtQueue state.

This patch solves the memory leak by introducing qvirtqueue_cleanup().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tests/libqos/virtio.h b/tests/libqos/virtio.h
index c73fd8c24a..0250842bf2 100644
--- a/tests/libqos/virtio.h
+++ b/tests/libqos/virtio.h
@@ -79,6 +79,9 @@ typedef struct QVirtioBus {
     QVirtQueue *(*virtqueue_setup)(QVirtioDevice *d, QGuestAllocator *alloc,
                                                                 uint16_t index);
 
+    /* Free virtqueue resources */
+    void (*virtqueue_cleanup)(QVirtQueue *vq, QGuestAllocator *alloc);
+
     /* Notify changes in virtqueue */
     void (*virtqueue_kick)(QVirtioDevice *d, QVirtQueue *vq);
 } QVirtioBus;
@@ -118,6 +121,8 @@ void qvirtio_wait_config_isr(const QVirtioBus *bus, QVirtioDevice *d,
                              gint64 timeout_us);
 QVirtQueue *qvirtqueue_setup(const QVirtioBus *bus, QVirtioDevice *d,
                                         QGuestAllocator *alloc, uint16_t index);
+void qvirtqueue_cleanup(const QVirtioBus *bus, QVirtQueue *vq,
+                        QGuestAllocator *alloc);
 
 void qvring_init(const QGuestAllocator *alloc, QVirtQueue *vq, uint64_t addr);
 QVRingIndirectDesc *qvring_indirect_desc_setup(QVirtioDevice *d,