46     BdrvChild *root;  member
276     if (blk->root) {  in blk_root_inactivate()
277         bdrv_child_try_set_perm(blk->root, 0, BLK_PERM_ALL, &error_abort);  in blk_root_inactivate()
470     if (!blk->root) {  in blk_new_open()
486     if (blk->root) {  in blk_delete()
570         if (blk->root) {  in blk_remove_all_bs()
762     return blk->root ? blk->root->bs : NULL;  in blk_bs()
871     BdrvChild *root;  in blk_remove_bs()  local
898     root = blk->root;  in blk_remove_bs()
899     blk->root = NULL;  in blk_remove_bs()
902     bdrv_root_unref_child(root);  in blk_remove_bs()
916     blk->root = bdrv_root_attach_child(bs, "root", &child_root,  in blk_insert_bs()
921     if (blk->root == NULL) {  in blk_insert_bs()
940     return bdrv_replace_child_bs(blk->root, new_bs, errp);  in blk_replace_bs()
953     if (blk->root && !blk->disable_perm) {  in blk_set_perm_locked()
954         ret = bdrv_child_try_set_perm(blk->root, perm, shared_perm, errp);  in blk_set_perm_locked()
1347     ret = bdrv_co_preadv_part(blk->root, offset, bytes, qiov, qiov_offset,  in blk_co_do_preadv_part()
1425     ret = bdrv_co_pwritev_part(blk->root, offset, bytes, qiov, qiov_offset,  in blk_co_do_pwritev_part()
1499     return bdrv_make_zero(blk->root, flags);  in blk_make_zero()
1788     return bdrv_co_pdiscard(blk->root, offset, bytes);  in blk_co_do_pdiscard()
2348     return MIN_NON_ZERO(blk->root->bs->bl.max_hw_iov,  in blk_get_max_hw_iov()
2349                         blk->root->bs->bl.max_iov);  in blk_get_max_hw_iov()
2355     return blk->root->bs->bl.max_iov;  in blk_get_max_iov()
2614     return bdrv_co_truncate(blk->root, offset, exact, prealloc, flags, errp);  in blk_co_truncate()
2678     assert(blk->root);  in blk_update_root_state()
2680     blk->root_state.open_flags    = blk->root->bs->open_flags;  in blk_update_root_state()
2681     blk->root_state.detect_zeroes = blk->root->bs->detect_zeroes;  in blk_update_root_state()
2877     return bdrv_co_copy_range(blk_in->root, off_in,  in blk_co_copy_range()
2878                               blk_out->root, off_out,  in blk_co_copy_range()
2885     return blk->root;  in blk_root()
2898     return bdrv_make_empty(blk->root, errp);  in blk_make_empty()