DD_USED_SNAP
DD_USED_HEAD, DD_USED_SNAP, tx);
dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP];
dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx);
dsl_dir_phys(odd)->dd_used_breakdown[DD_USED_SNAP];
dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx);
dd_used_breakdown[DD_USED_SNAP], ==, 0);
DD_USED_HEAD, DD_USED_SNAP, tx);
dsl_dir_diduse_space(ds->ds_dir, DD_USED_SNAP,
dsl_dir_diduse_space(ds->ds_dir, DD_USED_SNAP,
return (dsl_dir_phys(dd)->dd_used_breakdown[DD_USED_SNAP]);