Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 89 insertions, 0 deletions

diff --git a/include/hw/xen/xen-block.h b/include/hw/xen/xen-block.h
new file mode 100644
index 000000000..d692ea758
--- /dev/null
+++ b/include/hw/xen/xen-block.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2018  Citrix Systems Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HW_XEN_BLOCK_H
+#define HW_XEN_BLOCK_H
+
+#include "hw/xen/xen-bus.h"
+#include "hw/block/block.h"
+#include "hw/block/dataplane/xen-block.h"
+#include "sysemu/iothread.h"
+#include "qom/object.h"
+
+typedef enum XenBlockVdevType {
+    XEN_BLOCK_VDEV_TYPE_INVALID,
+    XEN_BLOCK_VDEV_TYPE_DP,
+    XEN_BLOCK_VDEV_TYPE_XVD,
+    XEN_BLOCK_VDEV_TYPE_HD,
+    XEN_BLOCK_VDEV_TYPE_SD,
+    XEN_BLOCK_VDEV_TYPE__MAX
+} XenBlockVdevType;
+
+typedef struct XenBlockVdev {
+    XenBlockVdevType type;
+    unsigned long disk;
+    unsigned long partition;
+    unsigned long number;
+} XenBlockVdev;
+
+
+typedef struct XenBlockProperties {
+    XenBlockVdev vdev;
+    BlockConf conf;
+    unsigned int max_ring_page_order;
+    IOThread *iothread;
+} XenBlockProperties;
+
+typedef struct XenBlockDrive {
+    char *id;
+    char *node_name;
+} XenBlockDrive;
+
+typedef struct XenBlockIOThread {
+    char *id;
+} XenBlockIOThread;
+
+struct XenBlockDevice {
+    XenDevice xendev;
+    XenBlockProperties props;
+    const char *device_type;
+    unsigned int info;
+    XenBlockDataPlane *dataplane;
+    XenBlockDrive *drive;
+    XenBlockIOThread *iothread;
+};
+typedef struct XenBlockDevice XenBlockDevice;
+
+typedef void (*XenBlockDeviceRealize)(XenBlockDevice *blockdev, Error **errp);
+typedef void (*XenBlockDeviceUnrealize)(XenBlockDevice *blockdev);
+
+struct XenBlockDeviceClass {
+    /*< private >*/
+    XenDeviceClass parent_class;
+    /*< public >*/
+    XenBlockDeviceRealize realize;
+    XenBlockDeviceUnrealize unrealize;
+};
+
+#define TYPE_XEN_BLOCK_DEVICE  "xen-block"
+OBJECT_DECLARE_TYPE(XenBlockDevice, XenBlockDeviceClass, XEN_BLOCK_DEVICE)
+
+struct XenDiskDevice {
+    XenBlockDevice blockdev;
+};
+
+#define TYPE_XEN_DISK_DEVICE  "xen-disk"
+OBJECT_DECLARE_SIMPLE_TYPE(XenDiskDevice, XEN_DISK_DEVICE)
+
+struct XenCDRomDevice {
+    XenBlockDevice blockdev;
+};
+
+#define TYPE_XEN_CDROM_DEVICE  "xen-cdrom"
+OBJECT_DECLARE_SIMPLE_TYPE(XenCDRomDevice, XEN_CDROM_DEVICE)
+
+#endif /* HW_XEN_BLOCK_H */