[SCSI] libiscsi: Add local_ipaddr parameter in iscsi_conn struct

Add local_ipaddr param and support get/set operations on it.

Signed-off-by: Adheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/libiscsi.c

@@ -2945,6 +2945,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
 	free_pages((unsigned long) conn->data,
 		   get_order(ISCSI_DEF_MAX_RECV_SEG_LEN));
 	kfree(conn->persistent_address);
+	kfree(conn->local_ipaddr);
 	kfifo_in(&session->cmdpool.queue, (void*)&conn->login_task,
 		    sizeof(void*));
 	if (session->leadconn == conn)
@@ -3269,6 +3270,8 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
 		sscanf(buf, "%d", &val);
 		session->discovery_sess = !!val;
 		break;
+	case ISCSI_PARAM_LOCAL_IPADDR:
+		return iscsi_switch_str_param(&conn->local_ipaddr, buf);
 	default:
 		return -ENOSYS;
 	}
@@ -3542,6 +3545,9 @@ int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
 	case ISCSI_PARAM_TCP_RECV_WSF:
 		len = sprintf(buf, "%u\n", conn->tcp_recv_wsf);
 		break;
+	case ISCSI_PARAM_LOCAL_IPADDR:
+		len = sprintf(buf, "%s\n", conn->local_ipaddr);
+		break;
 	default:
 		return -ENOSYS;
 	}

include/scsi/libiscsi.h

@@ -231,6 +231,7 @@ struct iscsi_conn {
 	uint8_t			ipv6_traffic_class;
 	uint8_t			ipv6_flow_label;
 	uint8_t			is_fw_assigned_ipv6;
+	char			*local_ipaddr;
 
 	/* MIB-statistics */
 	uint64_t		txdata_octets;