vhost net backend needs to be notified when

frontend status changes. Add a callback.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

---

 hw/s390-virtio-bus.c |    3 +++

 hw/syborg_virtio.c   |    2 ++

 hw/virtio-pci.c      |    6 ++++++

 hw/virtio.h          |    1 +

 4 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/hw/s390-virtio-bus.c b/hw/s390-virtio-bus.c

index 980e7eb..f45b67d 100644

--- a/hw/s390-virtio-bus.c

+++ b/hw/s390-virtio-bus.c

@@ -243,6 +243,9 @@ void s390_virtio_device_update_status(VirtIOS390Device *dev)

     uint32_t features;

     vdev->status = ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS);

+    if (vdev->set_status) {

+        vdev->set_status(vdev);

+    }

     /* Update guest supported feature bitmap */

diff --git a/hw/syborg_virtio.c b/hw/syborg_virtio.c

index 65239a0..19f6473 100644

--- a/hw/syborg_virtio.c

+++ b/hw/syborg_virtio.c

@@ -152,6 +152,8 @@ static void syborg_virtio_writel(void *opaque, target_phys_addr_t offset,

         vdev->status = value & 0xFF;

         if (vdev->status == 0)

             virtio_reset(vdev);

+        if (vdev->set_status)

+            vdev->set_status(vdev);

         break;

     case SYBORG_VIRTIO_INT_ENABLE:

         s->int_enable = value;

diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c

index 573c98a..05898c8 100644

--- a/hw/virtio-pci.c

+++ b/hw/virtio-pci.c

@@ -208,6 +208,9 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)

             virtio_reset(proxy->vdev);

             msix_unuse_all_vectors(&proxy->pci_dev);

         }

+        if (vdev->set_status) {

+            vdev->set_status(vdev);

+        }

         break;

     case VIRTIO_MSI_CONFIG_VECTOR:

         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);

@@ -375,6 +378,9 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,

     if (PCI_COMMAND == address) {

         if (!(val & PCI_COMMAND_MASTER)) {

             proxy->vdev->status &= ~VIRTIO_CONFIG_S_DRIVER_OK;

+            if (proxy->vdev->set_status) {

+                proxy->vdev->set_status(proxy->vdev);

+            }

         }

     }

diff --git a/hw/virtio.h b/hw/virtio.h

index f140ca3..39d0763 100644

--- a/hw/virtio.h

+++ b/hw/virtio.h

@@ -114,6 +114,7 @@ struct VirtIODevice

     void (*get_config)(VirtIODevice *vdev, uint8_t *config);

     void (*set_config)(VirtIODevice *vdev, const uint8_t *config);

     void (*reset)(VirtIODevice *vdev);

+    void (*set_status)(VirtIODevice *vdev);

     VirtQueue *vq;

     const VirtIOBindings *binding;

     void *binding_opaque;

-- 

1.6.6.144.g5c3af