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vhost-user: allow "vhost_set_vring" to wait for a reply
The "vhost_set_vring" function already centralizes the common parts of "vhost_user_set_vring_num", "vhost_user_set_vring_base" and "vhost_user_set_vring_enable". We'll want to allow some of those callers to wait for a reply. Therefore, rebase "vhost_set_vring" from just "vhost_user_write" to "vhost_user_write_sync", exposing the "wait_for_reply" parameter. This is purely refactoring -- there is no observable change. That's because: - all three callers pass in "false" for "wait_for_reply", which disables all logic in "vhost_user_write_sync" except the call to "vhost_user_write"; - the fds=NULL and fd_num=0 arguments of the original "vhost_user_write" call inside "vhost_set_vring" are hard-coded within "vhost_user_write_sync". Cc: "Michael S. Tsirkin" <mst@redhat.com> (supporter:vhost) Cc: Eugenio Perez Martin <eperezma@redhat.com> Cc: German Maglione <gmaglione@redhat.com> Cc: Liu Jiang <gerry@linux.alibaba.com> Cc: Sergio Lopez Pascual <slp@redhat.com> Cc: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Tested-by: Albert Esteve <aesteve@redhat.com> Reviewed-by: Eugenio Pérez <eperezma@redhat.com> Message-Id: <20231002203221.17241-7-lersek@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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