[SCSI] transport_srp: add rport roles attribute

This adds a 'roles' attribute to rport like transport_fc. The role can
be initiator or target. That is, the initiator driver creates target
remote ports and the target driver creates initiator remote ports.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index d8d056e..e616c4f 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1545,6 +1545,7 @@
 
 	memcpy(ids.port_id, &target->id_ext, 8);
 	memcpy(ids.port_id + 8, &target->ioc_guid, 8);
+	ids.roles = SRP_RPORT_ROLE_TARGET;
 	rport = srp_rport_add(target->scsi_host, &ids);
 	if (IS_ERR(rport)) {
 		scsi_remove_host(target->scsi_host);