1 files changed, 47 insertions, 0 deletions
diff --git a/include/hw/xen/xen-bus-helper.h b/include/hw/xen/xen-bus-helper.h
new file mode 100644
index 0000000000..d8dcc2f010
--- /dev/null
+++ b/include/hw/xen/xen-bus-helper.h
@@ -0,0 +1,47 @@
+/*
+ * 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_BUS_HELPER_H
+#define HW_XEN_BUS_HELPER_H
+
+#include "hw/xen/xen_backend_ops.h"
+
+const char *xs_strstate(enum xenbus_state state);
+
+void xs_node_create(struct qemu_xs_handle *h,  xs_transaction_t tid,
+                    const char *node, unsigned int owner, unsigned int domid,
+                    unsigned int perms, Error **errp);
+void xs_node_destroy(struct qemu_xs_handle *h,  xs_transaction_t tid,
+                     const char *node, Error **errp);
+
+/* Write to node/key unless node is empty, in which case write to key */
+void xs_node_vprintf(struct qemu_xs_handle *h,  xs_transaction_t tid,
+                     const char *node, const char *key, Error **errp,
+                     const char *fmt, va_list ap)
+    G_GNUC_PRINTF(6, 0);
+void xs_node_printf(struct qemu_xs_handle *h,  xs_transaction_t tid,
+                    const char *node, const char *key, Error **errp,
+                    const char *fmt, ...)
+    G_GNUC_PRINTF(6, 7);
+
+/* Read from node/key unless node is empty, in which case read from key */
+int xs_node_vscanf(struct qemu_xs_handle *h,  xs_transaction_t tid,
+                   const char *node, const char *key, Error **errp,
+                   const char *fmt, va_list ap)
+    G_GNUC_SCANF(6, 0);
+int xs_node_scanf(struct qemu_xs_handle *h,  xs_transaction_t tid,
+                  const char *node, const char *key, Error **errp,
+                  const char *fmt, ...)
+    G_GNUC_SCANF(6, 7);
+
+/* Watch node/key unless node is empty, in which case watch key */
+struct qemu_xs_watch *xs_node_watch(struct qemu_xs_handle *h, const char *node,
+                                    const char *key, xs_watch_fn fn,
+                                    void *opaque, Error **errp);
+void xs_node_unwatch(struct qemu_xs_handle *h, struct qemu_xs_watch *w);
+
+#endif /* HW_XEN_BUS_HELPER_H */