be_destroy_callback
if (be_destroy_callback(zhp, dd) != 0) {
if ((ret = zfs_iter_filesystems(zhp, be_destroy_callback, dd)) != 0) {
if ((ret = zfs_iter_snapshots(zhp, B_FALSE, be_destroy_callback,
static int be_destroy_callback(zfs_handle_t *, void *);