On Mon, Mar 27, 2017 at 07:46:03PM +0200, Greg Kurz wrote:
> This introduces an Error object based implementation of virtio_error(). It
> allows to implement virtio_error() wrappers in device-specific code.
>
> Signed-off-by: Greg Kurz <gr...@kaod.org>
> ---
> hw/virtio/virtio.c | 21 ++++++++++++++++-----
> include/hw/virtio/virtio.h | 1 +
> 2 files changed, 17 insertions(+), 5 deletions(-)
>
> diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> index 03592c542a55..4036f4816038 100644
> --- a/hw/virtio/virtio.c
> +++ b/hw/virtio/virtio.c
> @@ -2443,6 +2443,16 @@ void virtio_device_set_child_bus_name(VirtIODevice
> *vdev, char *bus_name)
> vdev->bus_name = g_strdup(bus_name);
> }
>
> +static void virtio_device_set_broken(VirtIODevice *vdev)
> +{
> + vdev->broken = true;
> +
> + if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
> + virtio_set_status(vdev, vdev->status | VIRTIO_CONFIG_S_NEEDS_RESET);
> + virtio_notify_config(vdev);
> + }
> +}
> +
> void GCC_FMT_ATTR(2, 3) virtio_error(VirtIODevice *vdev, const char *fmt,
> ...)
> {
> va_list ap;
It's worth pondering whether we can set this for versions < 1.0 too.
> @@ -2451,12 +2461,13 @@ void GCC_FMT_ATTR(2, 3) virtio_error(VirtIODevice
> *vdev, const char *fmt, ...)
> error_vreport(fmt, ap);
> va_end(ap);
>
> - vdev->broken = true;
> + virtio_device_set_broken(vdev);
> +}
>
> - if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
> - virtio_set_status(vdev, vdev->status | VIRTIO_CONFIG_S_NEEDS_RESET);
> - virtio_notify_config(vdev);
> - }
> +void virtio_error_err(VirtIODevice *vdev, Error *err)
> +{
> + error_report_err(err);
> + virtio_device_set_broken(vdev);
> }
>
> static void virtio_memory_listener_commit(MemoryListener *listener)
Should this skip error report if device is already broken?
Otherwise we'll get a ton of errors in the log.
Also, whether to stop the device, or the VM, or just warn,
seems like a policy decision. Why not set it on command line
like we do for other storage?
> diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
> index 15efcf205711..5b13c5f67b63 100644
> --- a/include/hw/virtio/virtio.h
> +++ b/include/hw/virtio/virtio.h
> @@ -150,6 +150,7 @@ void virtio_init(VirtIODevice *vdev, const char *name,
> void virtio_cleanup(VirtIODevice *vdev);
>
> void virtio_error(VirtIODevice *vdev, const char *fmt, ...) GCC_FMT_ATTR(2,
> 3);
> +void virtio_error_err(VirtIODevice *vdev, Error *err);
>
> /* Set the child bus name. */
> void virtio_device_set_child_bus_name(VirtIODevice *vdev, char *bus_name);
