block: Use children list in bdrv_refresh_filename

bdrv_refresh_filename() should invoke itself recursively on all
children, not just on file.

With that change, we can remove the manual invocations in blkverify,
quorum, commit, mirror, and blklogwrites.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20190201192935.18394-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/block.c b/block.c
index 88aa687a68..d97f5e7084 100644
--- a/block.c
+++ b/block.c
@@ -5536,16 +5536,17 @@ static bool append_open_options(QDict *d, BlockDriverState *bs)
 void bdrv_refresh_filename(BlockDriverState *bs)
 {
     BlockDriver *drv = bs->drv;
+    BdrvChild *child;
     QDict *opts;
 
     if (!drv) {
         return;
     }
 
-    /* This BDS's file name will most probably depend on its file's name, so
-     * refresh that first */
-    if (bs->file) {
-        bdrv_refresh_filename(bs->file->bs);
+    /* This BDS's file name may depend on any of its children's file names, so
+     * refresh those first */
+    QLIST_FOREACH(child, &bs->children, next) {
+        bdrv_refresh_filename(child->bs);
     }
 
     if (drv->bdrv_refresh_filename) {