[Qemu-devel] [RFC 3/6] migration: Add VMSTATE_UNUSED_VARRAY_UINT32

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <address@hidden>

VMSTATE_UNUSED_VARRAY_UINT32 is used to skip a chunk of the stream
that's an n-element array;  note the array size and the dynamic value
read never get multiplied so there's no overflow risk.

Signed-off-by: Dr. David Alan Gilbert <address@hidden>
---
 include/migration/vmstate.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 1638ee5..a0eff5e 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -643,6 +643,17 @@ extern const VMStateInfo vmstate_info_bitmap;
     .flags        = VMS_BUFFER,                                      \
 }
 
+/* Discard size * field_num bytes, where field_num is a uint32 member */
+#define VMSTATE_UNUSED_VARRAY_UINT32(_state, _test, _version, _field_num, 
_size) {\
+    .name         = "unused",                                        \
+    .field_exists = (_test),                                         \
+    .num_offset   = vmstate_offset_value(_state, _field_num, uint32_t),\
+    .version_id   = (_version),                                      \
+    .size         = (_size),                                         \
+    .info         = &vmstate_info_unused_buffer,                     \
+    .flags        = VMS_VARRAY_UINT32 | VMS_BUFFER,                  \
+}
+
 /* _field_size should be a int32_t field in the _state struct giving the
  * size of the bitmap _field in bits.
  */
-- 
2.7.4