[SCSI] libfc: register FC4 features with the FC switch

Customers and certification tests have pointed out that we don't
show up on the switch management software as an initiator.

On some MDS switches 'show fcns database' command shows libfc
initiators as 'fcp' not 'fcp:init' like other initiators.

On others switches, I think the switch gets the features by doing a PRLI,
but it may be only certain models or under certain configurations.

Fix this by registering our FC4 features with the RFF_ID CT request
after local port login and after the RFT_ID.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index ab2260cb149c..8eb0a0fc0a71 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -32,6 +32,7 @@ struct fc_ct_req {
                 struct fc_ns_gid_ft gid;
                 struct fc_ns_rn_id  rn;
                 struct fc_ns_rft rft;
+                struct fc_ns_rff_id rff;
                 struct fc_ns_fid fid;
                 struct fc_ns_rsnn snn;
                 struct fc_ns_rspn spn;
@@ -131,6 +132,17 @@ static inline int fc_ct_fill(struct fc_lport *lport,
                 ct->payload.rft.fts = lport->fcts;
                 break;
 
+        case FC_NS_RFF_ID:
+                ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rff_id));
+                hton24(ct->payload.rff.fr_fid.fp_fid,
+                       fc_host_port_id(lport->host));
+                ct->payload.rff.fr_type = FC_TYPE_FCP;
+                if (lport->service_params & FCP_SPPF_INIT_FCN)
+                        ct->payload.rff.fr_feat = FCP_FEAT_INIT;
+                if (lport->service_params & FCP_SPPF_TARG_FCN)
+                        ct->payload.rff.fr_feat |= FCP_FEAT_TARG;
+                break;
+
         case FC_NS_RNN_ID:
                 ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
                 hton24(ct->payload.rn.fr_fid.fp_fid,