From 28770ff935bce723c5799d292bc788770b69a733 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Wed, 9 Jun 2021 08:46:53 -0700 Subject: vhost: Distinguish errors in vhost_backend_init() Instead of just returning 0/-1 and letting the caller make up a meaningless error message, add an Error parameter to allow reporting the real error and switch to 0/-errno so that different kind of errors can be distinguished in the caller. Specifically, in vhost-user, EPROTO is used for all errors that relate to the connection itself, whereas other error codes are used for errors relating to the content of the connection. This will allow us later to automatically reconnect when the connection goes away, without ending up in an endless loop if it's a permanent error in the configuration. Signed-off-by: Kevin Wolf Message-Id: <20210609154658.350308-3-kwolf@redhat.com> Reviewed-by: Stefano Garzarella Reviewed-by: Raphael Norwitz Signed-off-by: Kevin Wolf --- include/hw/virtio/vhost-backend.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/hw/virtio/vhost-backend.h') diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h index 8a6f8e2a7a..728ebb0ed9 100644 --- a/include/hw/virtio/vhost-backend.h +++ b/include/hw/virtio/vhost-backend.h @@ -37,7 +37,8 @@ struct vhost_scsi_target; struct vhost_iotlb_msg; struct vhost_virtqueue; -typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque); +typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque, + Error **errp); typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev); typedef int (*vhost_backend_memslots_limit)(struct vhost_dev *dev); -- cgit 1.4.1