scsi: libfc: Implement RTV responder

The libfc stack generates an RTV request, so we should be implementing
an RTV responder, too.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index d2d8607..426c399 100644 (file)
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1268,7 +1268,7 @@ static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
 }
 
 /**
- * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses
+ * fc_rport_rtv_resp() - Handler for Request Timeout Value (RTV) responses
  * @sp:               The sequence the RTV was on
  * @fp:               The RTV response frame
  * @rdata_arg: The remote port that sent the RTV response
@@ -1374,6 +1374,41 @@ static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
 }
 
 /**
+ * fc_rport_recv_rtv_req() - Handler for Read Timeout Value (RTV) requests
+ * @rdata: The remote port that sent the RTV request
+ * @in_fp: The RTV request frame
+ *
+ * Locking Note:  Called with the lport and rport locks held.
+ */
+static void fc_rport_recv_rtv_req(struct fc_rport_priv *rdata,
+                                 struct fc_frame *in_fp)
+{
+       struct fc_lport *lport = rdata->local_port;
+       struct fc_frame *fp;
+       struct fc_els_rtv_acc *rtv;
+       struct fc_seq_els_data rjt_data;
+
+       FC_RPORT_DBG(rdata, "Received RTV request\n");
+
+       fp = fc_frame_alloc(lport, sizeof(*rtv));
+       if (!fp) {
+               rjt_data.reason = ELS_RJT_UNAB;
+               rjt_data.reason = ELS_EXPL_INSUF_RES;
+               lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
+               goto drop;
+       }
+       rtv = fc_frame_payload_get(fp, sizeof(*rtv));
+       rtv->rtv_cmd = ELS_LS_ACC;
+       rtv->rtv_r_a_tov = htonl(lport->r_a_tov);
+       rtv->rtv_e_d_tov = htonl(lport->e_d_tov);
+       rtv->rtv_toq = 0;
+       fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
+       lport->tt.frame_send(lport, fp);
+drop:
+       fc_frame_free(in_fp);
+}
+
+/**
  * fc_rport_logo_resp() - Handler for logout (LOGO) responses
  * @sp:               The sequence the LOGO was on
  * @fp:               The LOGO response frame
@@ -1678,6 +1713,9 @@ static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
        case ELS_RLS:
                fc_rport_recv_rls_req(rdata, fp);
                break;
+       case ELS_RTV:
+               fc_rport_recv_rtv_req(rdata, fp);
+               break;
        default:
                fc_frame_free(fp);      /* can't happen */
                break;
@@ -1729,6 +1767,7 @@ static void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp)
        case ELS_RRQ:
        case ELS_REC:
        case ELS_RLS:
+       case ELS_RTV:
                fc_rport_recv_els_req(lport, fp);
                break;
        default: