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, 67 insertions, 0 deletions

diff --git a/include/qapi/qmp/dispatch.h b/include/qapi/qmp/dispatch.h
new file mode 100644
index 000000000..1e4240fd0
--- /dev/null
+++ b/include/qapi/qmp/dispatch.h
@@ -0,0 +1,67 @@
+/*
+ * Core Definitions for QAPI/QMP Dispatch
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#ifndef QAPI_QMP_DISPATCH_H
+#define QAPI_QMP_DISPATCH_H
+
+#include "monitor/monitor.h"
+#include "qemu/queue.h"
+
+typedef void (QmpCommandFunc)(QDict *, QObject **, Error **);
+
+typedef enum QmpCommandOptions
+{
+    QCO_NO_SUCCESS_RESP       =  (1U << 0),
+    QCO_ALLOW_OOB             =  (1U << 1),
+    QCO_ALLOW_PRECONFIG       =  (1U << 2),
+    QCO_COROUTINE             =  (1U << 3),
+} QmpCommandOptions;
+
+typedef struct QmpCommand
+{
+    const char *name;
+    /* Runs in coroutine context if QCO_COROUTINE is set */
+    QmpCommandFunc *fn;
+    QmpCommandOptions options;
+    unsigned special_features;
+    QTAILQ_ENTRY(QmpCommand) node;
+    bool enabled;
+    const char *disable_reason;
+} QmpCommand;
+
+typedef QTAILQ_HEAD(QmpCommandList, QmpCommand) QmpCommandList;
+
+void qmp_register_command(QmpCommandList *cmds, const char *name,
+                          QmpCommandFunc *fn, QmpCommandOptions options,
+                          unsigned special_features);
+const QmpCommand *qmp_find_command(const QmpCommandList *cmds,
+                                   const char *name);
+void qmp_disable_command(QmpCommandList *cmds, const char *name,
+                         const char *err_msg);
+void qmp_enable_command(QmpCommandList *cmds, const char *name);
+
+bool qmp_command_is_enabled(const QmpCommand *cmd);
+bool qmp_command_available(const QmpCommand *cmd, Error **errp);
+const char *qmp_command_name(const QmpCommand *cmd);
+bool qmp_has_success_response(const QmpCommand *cmd);
+QDict *qmp_error_response(Error *err);
+QDict *qmp_dispatch(const QmpCommandList *cmds, QObject *request,
+                    bool allow_oob, Monitor *cur_mon);
+bool qmp_is_oob(const QDict *dict);
+
+typedef void (*qmp_cmd_callback_fn)(const QmpCommand *cmd, void *opaque);
+
+void qmp_for_each_command(const QmpCommandList *cmds, qmp_cmd_callback_fn fn,
+                          void *opaque);
+
+#endif