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[Qemu-devel] [PULL for-2.1 03/24] dataplane: bail out on unsupported tra
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL for-2.1 03/24] dataplane: bail out on unsupported transport |
Date: |
Tue, 1 Jul 2014 10:48:36 +0200 |
From: Cornelia Huck <address@hidden>
If the virtio transport does not support notifiers (like s390-virtio),
we can't use dataplane. Bail out early and let the user know what is
wrong.
Signed-off-by: Cornelia Huck <address@hidden>
Reviewed-by: Stefan Hajnoczi <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
hw/block/dataplane/virtio-blk.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index 09bd2c7..f6e1a5d 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -127,6 +127,8 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev,
VirtIOBlkConf *blk,
VirtIOBlockDataPlane *s;
VirtIOBlock *vblk = VIRTIO_BLK(vdev);
Error *local_err = NULL;
+ BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
*dataplane = NULL;
@@ -134,6 +136,14 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev,
VirtIOBlkConf *blk,
return;
}
+ /* Don't try if transport does not support notifiers. */
+ if (!k->set_guest_notifiers || !k->set_host_notifier) {
+ error_setg(errp,
+ "device is incompatible with x-data-plane "
+ "(transport does not support notifiers)");
+ return;
+ }
+
/* If dataplane is (re-)enabled while the guest is running there could be
* block jobs that can conflict.
*/
--
1.9.3
- [Qemu-devel] [PULL for-2.1 00/24] Block patches, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 01/24] qom: add object_property_add_alias(), Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 02/24] virtio-blk: avoid qdev property definition duplication, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 04/24] virtio-blk: move x-data-plane qdev property to virtio-blk.h, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 05/24] qdev: add qdev_alias_all_properties(), Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 03/24] dataplane: bail out on unsupported transport,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL for-2.1 06/24] virtio-blk: use aliases instead of duplicate qdev properties, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 07/24] virtio-blk: drop virtio_blk_set_conf(), Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 08/24] virtio: fix virtio-blk child refcount in transports, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 09/24] virtio-blk: move qdev properties into virtio-blk.c, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 10/24] virtio-blk: replace x-iothread with iothread link property, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 11/24] qdev: drop iothread property type, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 12/24] virtio-blk: remove need for explicit x-data-plane=on option, Stefan Hajnoczi, 2014/07/01
- [Qemu-devel] [PULL for-2.1 13/24] qemu-img create: add 'nocow' option, Stefan Hajnoczi, 2014/07/01