[PATCH v5 12/22] parallels: drop dirty bitmap data if the image was not properly closed

[Alexander Ivanov <alexander.ivanov@virtuozzo.com>]

From: "Denis V. Lunev" <den@openvz.org>

This data is obsolete.

The approach is exactly the same like we use with QCOW2.

Signed-off-by: Denis V. Lunev <den@openvz.org>
---
 block/parallels-ext.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/block/parallels-ext.c b/block/parallels-ext.c
index 9cb8e65c0d..7fa14b057d 100644
--- a/block/parallels-ext.c
+++ b/block/parallels-ext.c
@@ -255,6 +255,14 @@ parallels_parse_format_extension(BlockDriverState *bs, uint8_t *ext_cluster,
             return 0;
 
         case PARALLELS_DIRTY_BITMAP_FEATURE_MAGIC:
+            if (s->header_unclean) {
+                /*
+                 * The image was not closed correctly and thus dirty bitmap
+                 * data inside the image is considered as incorrect and thus
+                 * it should be dropper, exactly like we do for QCOW2.
+                 */
+                break;
+            }
             bitmap = parallels_load_bitmap(bs, pos, fh.data_size, errp);
             if (!bitmap) {
                 goto fail;
-- 
2.40.1