migration: consolidate VMStateField.start

[qemu.git] / block.c

diff --git a/block.c b/block.c
index 1dbc060c3fa30f6d728269fba933b28fe87a6c2d..743c3491007a2677d8e238df47a72e2fa2dd5b7c 100644 (file)
--- a/block.c
+++ b/block.c
@@ -3145,6 +3145,7 @@ BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
     int is_protocol = 0;
     BlockDriverState *curr_bs = NULL;
     BlockDriverState *retval = NULL;
+    Error *local_error = NULL;
 
     if (!bs || !bs->drv || !backing_file) {
         return NULL;
@@ -3165,6 +3166,18 @@ BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
                 retval = curr_bs->backing->bs;
                 break;
             }
+            /* Also check against the full backing filename for the image */
+            bdrv_get_full_backing_filename(curr_bs, backing_file_full, PATH_MAX,
+                                           &local_error);
+            if (local_error == NULL) {
+                if (strcmp(backing_file, backing_file_full) == 0) {
+                    retval = curr_bs->backing->bs;
+                    break;
+                }
+            } else {
+                error_free(local_error);
+                local_error = NULL;
+            }
         } else {
             /* If not an absolute filename path, make it relative to the current
              * image's filename path */
@@ -3235,19 +3248,18 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
     if (!(bs->open_flags & BDRV_O_INACTIVE)) {
         return;
     }
-    bs->open_flags &= ~BDRV_O_INACTIVE;
 
-    if (bs->drv->bdrv_invalidate_cache) {
-        bs->drv->bdrv_invalidate_cache(bs, &local_err);
+    QLIST_FOREACH(child, &bs->children, next) {
+        bdrv_invalidate_cache(child->bs, &local_err);
         if (local_err) {
-            bs->open_flags |= BDRV_O_INACTIVE;
             error_propagate(errp, local_err);
             return;
         }
     }
 
-    QLIST_FOREACH(child, &bs->children, next) {
-        bdrv_invalidate_cache(child->bs, &local_err);
+    bs->open_flags &= ~BDRV_O_INACTIVE;
+    if (bs->drv->bdrv_invalidate_cache) {
+        bs->drv->bdrv_invalidate_cache(bs, &local_err);
         if (local_err) {
             bs->open_flags |= BDRV_O_INACTIVE;
             error_propagate(errp, local_err);