hammer_fs_to_vol
if (hammer_fs_to_vol(path, &ioc) == -1) {
if (hammer_fs_to_vol(av[0], &ioc) == -1) {
if (hammer_fs_to_vol(av[0], &ioc) == -1) {
int hammer_fs_to_vol(const char *fs, struct hammer_ioc_volume_list *iocp);
if (hammer_fs_to_vol(fs, &ioc) == -1)