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, 39 insertions, 0 deletions

diff --git a/include/qapi/opts-visitor.h b/include/qapi/opts-visitor.h
new file mode 100644
index 000000000..9b989e7e0
--- /dev/null
+++ b/include/qapi/opts-visitor.h
@@ -0,0 +1,39 @@
+/*
+ * Options Visitor
+ *
+ * Copyright Red Hat, Inc. 2012
+ *
+ * Author: Laszlo Ersek <lersek@redhat.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 OPTS_VISITOR_H
+#define OPTS_VISITOR_H
+
+#include "qapi/visitor.h"
+
+/* Inclusive upper bound on the size of any flattened range. This is a safety
+ * (= anti-annoyance) measure; wrong ranges should not cause long startup
+ * delays nor exhaust virtual memory.
+ */
+#define OPTS_VISITOR_RANGE_MAX 65536
+
+typedef struct OptsVisitor OptsVisitor;
+
+/* Contrarily to qemu-option.c::parse_option_number(), OptsVisitor's "int"
+ * parser relies on strtoll() instead of strtoull(). Consequences:
+ * - string representations of negative numbers yield negative values,
+ * - values below INT64_MIN or LLONG_MIN are rejected,
+ * - values above INT64_MAX or LLONG_MAX are rejected.
+ *
+ * The Opts input visitor does not implement support for visiting QAPI
+ * alternates, numbers (other than integers), null, or arbitrary
+ * QTypes.  It also requires a non-null list argument to
+ * visit_start_list().
+ */
+Visitor *opts_visitor_new(const QemuOpts *opts);
+
+#endif