fs/zfs/zfs.c

1395 	uint64_t headobj;
1441 	headobj = zfs_to_cpu64(((dsl_dir_phys_t *) DN_BONUS(&dn->dn))->dd_head_dataset_obj, dn->endian);
1443 	err = dnode_get(&(data->mos), headobj, DMU_OT_DSL_DATASET, mdn, data);
1458 			err = zap_lookup(mdn, snapname, &headobj, data);
1460 			err = dnode_get(&(data->mos), headobj, DMU_OT_DSL_DATASET, mdn, data);
1469 		*mdnobj = headobj;
2194 	uint64_t headobj;
2201 		headobj = zfs_to_cpu64(((dsl_dir_phys_t *) DN_BONUS(&mdn.dn))->dd_head_dataset_obj, mdn.endian);
2203 		err = dnode_get(&(data->mos), headobj, DMU_OT_DSL_DATASET, &mdn, data);
2317 		uint64_t childobj, headobj;
2326 		headobj = zfs_to_cpu64(((dsl_dir_phys_t *) DN_BONUS(&data->dnode.dn))->dd_head_dataset_obj, data->dnode.endian);
2337 		err = dnode_get(&(data->mos), headobj, DMU_OT_DSL_DATASET, &dn, data);