scsi: target: core: Use RTPI from target port

Replace all references to RTPI from LUN field to se_portal_group field. It
introduces consistent reporting of RTPI for all LUNs and all target ports.

Reviewed-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Roman Bolshakov <[e-mail]>
Signed-off-by: Dmitry Bogdanov <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Mike Christie <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/target/target_core_alua.c

···
 			/*
 			 * Set RELATIVE TARGET PORT IDENTIFIER
 			 */
-			put_unaligned_be16(lun->lun_rtpi, &buf[off]);
+			put_unaligned_be16(lun->lun_tpg->tpg_rtpi, &buf[off]);
 			off += 2;
 			rd_len += 4;
 		}
···
 			spin_lock(&dev->se_port_lock);
 			list_for_each_entry(lun, &dev->dev_sep_list,
 							lun_dev_link) {
-				if (lun->lun_rtpi != rtpi)
+				if (lun->lun_tpg->tpg_rtpi != rtpi)
 					continue;
 
 				// XXX: racy unlock

drivers/target/target_core_device.c

···
 				tpg->se_tpg_tfo->fabric_name);
 			continue;
 		}
-		if (lun->lun_rtpi != rtpi)
+		if (lun->lun_tpg->tpg_rtpi != rtpi)
 			continue;
 
 		kref_get(&deve->pr_kref);

drivers/target/target_core_pr.c

···
 	}
 	pr_reg->pr_res_mapped_lun = mapped_lun;
 	pr_reg->pr_aptpl_target_lun = lun->unpacked_lun;
-	pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi;
+	pr_reg->tg_pt_sep_rtpi = lun->lun_tpg->tpg_rtpi;
 	pr_reg->pr_res_key = sa_res_key;
 	pr_reg->pr_reg_all_tg_pt = all_tg_pt;
 	pr_reg->pr_reg_aptpl = aptpl;
···
 			rcu_read_unlock();
 
 			pr_reg->pr_reg_nacl = nacl;
-			pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi;
+			pr_reg->tg_pt_sep_rtpi = lun->lun_tpg->tpg_rtpi;
 			list_del(&pr_reg->pr_reg_aptpl_list);
 			spin_unlock(&pr_tmpl->aptpl_reg_lock);
 			/*
···
 			 */
 			if (tmp_tpg->proto_id != proto_ident)
 				continue;
-			dest_rtpi = tmp_lun->lun_rtpi;
+			dest_rtpi = tmp_lun->lun_tpg->tpg_rtpi;
 
 			iport_ptr = NULL;
 			i_str = target_parse_pr_out_transport_id(tmp_tpg,
···
 
 	spin_lock(&dev->se_port_lock);
 	list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) {
-		if (tmp_lun->lun_rtpi != rtpi)
+		if (tmp_lun->lun_tpg->tpg_rtpi != rtpi)
 			continue;
 		dest_se_tpg = tmp_lun->lun_tpg;
 		dest_tf_ops = dest_se_tpg->se_tpg_tfo;

drivers/target/target_core_spc.c

···
 		/* Skip over Obsolete field in RTPI payload
 		 * in Table 472 */
 		off += 2;
-		put_unaligned_be16(lun->lun_rtpi, &buf[off]);
+		put_unaligned_be16(lun->lun_tpg->tpg_rtpi, &buf[off]);
 		off += 2;
 		len += 8; /* Header size + Designation descriptor */
 		/*

drivers/target/target_core_stat.c

···
 	rcu_read_lock();
 	dev = rcu_dereference(lun->lun_se_dev);
 	if (dev)
-		ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_rtpi);
+		ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_tpg->tpg_rtpi);
 	rcu_read_unlock();
 	return ret;
 }
···
 	rcu_read_lock();
 	dev = rcu_dereference(lun->lun_se_dev);
 	if (dev)
-		ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_rtpi);
+		ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_tpg->tpg_rtpi);
 	rcu_read_unlock();
 	return ret;
 }
···
 	if (dev)
 		ret = snprintf(page, PAGE_SIZE, "%sPort#%u\n",
 			tpg->se_tpg_tfo->fabric_name,
-			lun->lun_rtpi);
+			lun->lun_tpg->tpg_rtpi);
 	rcu_read_unlock();
 	return ret;
 }