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virtio: get rid of VirtIOHandleAIOOutput

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The virtqueue host notifier API
virtio_queue_aio_set_host_notifier_handler() polls the virtqueue for new
buffers. AioContext previously required a bool progress return value
indicating whether an event was handled or not. This is no longer
necessary because the AioContext polling API has been split into a poll
check function and an event handler function. The event handler is only
run when we know there is work to do, so it doesn't return bool.

The VirtIOHandleAIOOutput function signature is now the same as
VirtIOHandleOutput. Get rid of the bool return value.

Further simplifications will be made for virtio-blk and virtio-scsi in
the next patch.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20211207132336.36627-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2021-12-07 13:23:32 +00:00
parent 826cc32423
commit d93d16c045
4 changed files with 13 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

12
hw/virtio/virtio.c
View file

@ -125,7 +125,7 @@ struct VirtQueue
uint16_t vector;
VirtIOHandleOutput handle_output;
VirtIOHandleAIOOutput handle_aio_output;
VirtIOHandleOutput handle_aio_output;
VirtIODevice *vdev;
EventNotifier guest_notifier;
EventNotifier host_notifier;
@ -2303,22 +2303,18 @@ void virtio_queue_set_align(VirtIODevice *vdev, int n, int align)
}
}
static bool virtio_queue_notify_aio_vq(VirtQueue *vq)
static void virtio_queue_notify_aio_vq(VirtQueue *vq)
{
bool ret = false;
if (vq->vring.desc && vq->handle_aio_output) {
VirtIODevice *vdev = vq->vdev;
trace_virtio_queue_notify(vdev, vq - vdev->vq, vq);
ret = vq->handle_aio_output(vdev, vq);
vq->handle_aio_output(vdev, vq);
if (unlikely(vdev->start_on_kick)) {
virtio_set_started(vdev, true);
}
}
return ret;
}
static void virtio_queue_notify_vq(VirtQueue *vq)
@ -3555,7 +3551,7 @@ static void virtio_queue_host_notifier_aio_poll_end(EventNotifier *n)
}
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
VirtIOHandleAIOOutput handle_output)
VirtIOHandleOutput handle_output)
{
if (handle_output) {
vq->handle_aio_output = handle_output;