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, 40 insertions, 0 deletions

diff --git a/scsi/pr-helper.h b/scsi/pr-helper.h
new file mode 100644
index 000000000..e26e104ec
--- /dev/null
+++ b/scsi/pr-helper.h
@@ -0,0 +1,40 @@
+/* Definitions for QEMU's persistent reservation helper daemon
+ *
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * Author:
+ *   Paolo Bonzini <pbonzini@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef QEMU_PR_HELPER_H
+#define QEMU_PR_HELPER_H
+
+#define PR_HELPER_CDB_SIZE     16
+#define PR_HELPER_SENSE_SIZE   96
+#define PR_HELPER_DATA_SIZE    8192
+
+typedef struct PRHelperResponse {
+    int32_t result;
+    int32_t sz;
+    uint8_t sense[PR_HELPER_SENSE_SIZE];
+} PRHelperResponse;
+
+#endif