block: Drop permissions when migration completes

With image locking, permissions affect other qemu processes as well. We
want to be sure that the destination can run, so let's drop permissions
on the source when migration completes.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/block.c b/block.c
index c8e6de2..444a52e 100644
--- a/block.c
+++ b/block.c
@@ -4019,7 +4019,7 @@ void bdrv_invalidate_cache_all(Error **errp)
 static int bdrv_inactivate_recurse(BlockDriverState *bs,
                                    bool setting_flag)
 {
-    BdrvChild *child;
+    BdrvChild *child, *parent;
     int ret;
 
     if (!setting_flag && bs->drv->bdrv_inactivate) {
@@ -4038,6 +4038,16 @@ static int bdrv_inactivate_recurse(BlockDriverState *bs,
 
     if (setting_flag) {
         bs->open_flags |= BDRV_O_INACTIVE;
+
+        QLIST_FOREACH(parent, &bs->parents, next_parent) {
+            if (parent->role->inactivate) {
+                ret = parent->role->inactivate(parent);
+                if (ret < 0) {
+                    bs->open_flags &= ~BDRV_O_INACTIVE;
+                    return ret;
+                }
+            }
+        }
     }
     return 0;
 }