Hi Kevin, This happens both on master and on your block-next tree:
$ qemu-io -f raw null-co:// -c 'reopen -r' Unexpected error in bdrv_check_perm() at /stor/work/qemu/block.c:1437: Block node is read-only Aborted It seems bs->read_only and perms go out of sync when bdrv_reopen() toggles the former. Something is missing here? Fam