From: Roman Kiryanov <r...@google.com>
VMSTATE_OPAQUE allows passing user defined functions to save
and load vmstate for cases when data structures do not fit
into int/struct/array terms.
Signed-off-by: Roman Kiryanov <r...@google.com>
---
include/migration/vmstate.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 9224370ed5..2736daef17 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -737,6 +737,19 @@ extern const VMStateInfo vmstate_info_qtailq;
.start = offsetof(_type, _next), \
}
+/* Provides a way to save/load complex data structures that do not
+ * fit into int/struct/array terms.
+ * _info: a user defined instance of VMStateInfo to handle saving and loading.
+ */
+#define VMSTATE_OPAQUE(_name, _version, _info) { \
+ .name = _name, \
+ .version_id = (_version), \
+ .size = 0, \
+ .info = &(_info), \
+ .flags = VMS_SINGLE, \
+ .offset = 0, \
+}
+
/* _f : field name
_f_n : num of elements field_name
_n : num of elements
--
2.21.0.1020.gf2820cf01a-goog
