Currently do_vhost_virtqueue_stop always sends GET_VRING_BASE to the
back-end, which requires the back-end to drain all in-flight I/O before
stopping the vring.
Add a skip_drain parameter to do_vhost_virtqueue_stop and propagate it
up through vhost_virtqueue_stop, vhost_dev_stop and their callers.
The parameter will be used in a follow-up commit to send a new protocol
message that instructs the back-end to suspend in-flight I/O immediately
instead of draining it.
Signed-off-by: Alexandr Moshkov <dtalexundeer@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260803072853.2920007-2-dtalexundeer@yandex-team.ru>
Alexandr Moshkov
5eb2347867