7 files changed, 169 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 88691adc1283..645b0fcbb370 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -362,6 +362,7 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
 
         INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
         INIT_WORK(&adapter->scan_work, zfcp_fc_scan_ports);
+        INIT_WORK(&adapter->ns_up_work, zfcp_fc_sym_name_update);
 
         if (zfcp_qdio_setup(adapter))
                 goto failed;
@@ -427,6 +428,7 @@ void zfcp_adapter_unregister(struct zfcp_adapter *adapter)
 
         cancel_work_sync(&adapter->scan_work);
         cancel_work_sync(&adapter->stat_work);
+        cancel_work_sync(&adapter->ns_up_work);
         zfcp_destroy_adapter_work_queue(adapter);
 
         zfcp_fc_wka_ports_force_offline(adapter->gs);
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 1566208997b6..527ba48eea57 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -189,6 +189,7 @@ struct zfcp_adapter {
         struct fsf_qtcb_bottom_port *stats_reset_data;
         unsigned long           stats_reset;
         struct work_struct      scan_work;
+        struct work_struct      ns_up_work;
         struct service_level    service_level;
         struct workqueue_struct *work_queue;
         struct device_dma_parameters dma_parms;
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 6c1cddf0d0a0..e1b4f800e226 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -1231,8 +1231,10 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
                 if (result == ZFCP_ERP_SUCCEEDED) {
                         register_service_level(&adapter->service_level);
                         queue_work(adapter->work_queue, &adapter->scan_work);
+                        queue_work(adapter->work_queue, &adapter->ns_up_work);
                 } else
                         unregister_service_level(&adapter->service_level);
+
                 kref_put(&adapter->ref, zfcp_adapter_release);
                 break;
         }
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index 410d9ddc175a..03627cfd81cd 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -96,6 +96,7 @@ extern int zfcp_fc_gs_setup(struct zfcp_adapter *);
 extern void zfcp_fc_gs_destroy(struct zfcp_adapter *);
 extern int zfcp_fc_exec_bsg_job(struct fc_bsg_job *);
 extern int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *);
+extern void zfcp_fc_sym_name_update(struct work_struct *);
 
 /* zfcp_fsf.c */
 extern struct kmem_cache *zfcp_fsf_qtcb_cache;
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index c839a3b6879d..297e6b71ce9c 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -11,6 +11,7 @@
 
 #include <linux/types.h>
 #include <linux/slab.h>
+#include <linux/utsname.h>
 #include <scsi/fc/fc_els.h>
 #include <scsi/libfc.h>
 #include "zfcp_ext.h"
@@ -696,6 +697,125 @@ out:
         zfcp_fc_wka_port_put(&adapter->gs->ds);
 }
 
+static int zfcp_fc_gspn(struct zfcp_adapter *adapter,
+                        struct zfcp_fc_req *fc_req)
+{
+        DECLARE_COMPLETION_ONSTACK(completion);
+        char devno[] = "DEVNO:";
+        struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
+        struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req;
+        struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp;
+        int ret;
+
+        zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID,
+                           FC_SYMBOLIC_NAME_SIZE);
+        hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host));
+
+        sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req));
+        sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp));
+
+        ct_els->handler = zfcp_fc_complete;
+        ct_els->handler_data = &completion;
+        ct_els->req = &fc_req->sg_req;
+        ct_els->resp = &fc_req->sg_rsp;
+
+        ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
+                               ZFCP_FC_CTELS_TMO);
+        if (ret)
+                return ret;
+
+        wait_for_completion(&completion);
+        if (ct_els->status)
+                return ct_els->status;
+
+        if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV &&
+            !(strstr(gspn_rsp->gspn.fp_name, devno)))
+                snprintf(fc_host_symbolic_name(adapter->scsi_host),
+                         FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s",
+                         gspn_rsp->gspn.fp_name, devno,
+                         dev_name(&adapter->ccw_device->dev),
+                         init_utsname()->nodename);
+        else
+                strlcpy(fc_host_symbolic_name(adapter->scsi_host),
+                        gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE);
+
+        return 0;
+}
+
+static void zfcp_fc_rspn(struct zfcp_adapter *adapter,
+                         struct zfcp_fc_req *fc_req)
+{
+        DECLARE_COMPLETION_ONSTACK(completion);
+        struct Scsi_Host *shost = adapter->scsi_host;
+        struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
+        struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req;
+        struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp;
+        int ret, len;
+
+        zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID,
+                           FC_SYMBOLIC_NAME_SIZE);
+        hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost));
+        len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost),
+                      FC_SYMBOLIC_NAME_SIZE);
+        rspn_req->rspn.fr_name_len = len;
+
+        sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req));
+        sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp));
+
+        ct_els->handler = zfcp_fc_complete;
+        ct_els->handler_data = &completion;
+        ct_els->req = &fc_req->sg_req;
+        ct_els->resp = &fc_req->sg_rsp;
+
+        ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
+                               ZFCP_FC_CTELS_TMO);
+        if (!ret)
+                wait_for_completion(&completion);
+}
+
+/**
+ * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name
+ * @work: ns_up_work of the adapter where to update the symbolic port name
+ *
+ * Retrieve the current symbolic port name that may have been set by
+ * the hardware using the GSPN request and update the fc_host
+ * symbolic_name sysfs attribute. When running in NPIV mode (and hence
+ * the port name is unique for this system), update the symbolic port
+ * name to add Linux specific information and update the FC nameserver
+ * using the RSPN request.
+ */
+void zfcp_fc_sym_name_update(struct work_struct *work)
+{
+        struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
+                                                    ns_up_work);
+        int ret;
+        struct zfcp_fc_req *fc_req;
+
+        if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
+            fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
+                return;
+
+        fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
+        if (!fc_req)
+                return;
+
+        ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
+        if (ret)
+                goto out_free;
+
+        ret = zfcp_fc_gspn(adapter, fc_req);
+        if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
+                goto out_ds_put;
+
+        memset(fc_req, 0, sizeof(*fc_req));
+        zfcp_fc_rspn(adapter, fc_req);
+
+out_ds_put:
+        zfcp_fc_wka_port_put(&adapter->gs->ds);
+out_free:
+        kmem_cache_free(zfcp_fc_req_cache, fc_req);
+}
+
 static void zfcp_fc_ct_els_job_handler(void *data)
 {
         struct fc_bsg_job *job = data;
diff --git a/drivers/s390/scsi/zfcp_fc.h b/drivers/s390/scsi/zfcp_fc.h
index 5243ce44aa42..4561f3bf7300 100644
--- a/drivers/s390/scsi/zfcp_fc.h
+++ b/drivers/s390/scsi/zfcp_fc.h
@@ -84,6 +84,40 @@ struct zfcp_fc_gpn_ft_req {
 } __packed;
 
 /**
+ * struct zfcp_fc_gspn_req - container for ct header plus GSPN_ID request
+ * @ct_hdr: FC GS common transport header
+ * @gspn: GSPN_ID request
+ */
+struct zfcp_fc_gspn_req {
+        struct fc_ct_hdr        ct_hdr;
+        struct fc_gid_pn_resp   gspn;
+} __packed;
+
+/**
+ * struct zfcp_fc_gspn_rsp - container for ct header plus GSPN_ID response
+ * @ct_hdr: FC GS common transport header
+ * @gspn: GSPN_ID response
+ * @name: The name string of the GSPN_ID response
+ */
+struct zfcp_fc_gspn_rsp {
+        struct fc_ct_hdr        ct_hdr;
+        struct fc_gspn_resp     gspn;
+        char                    name[FC_SYMBOLIC_NAME_SIZE];
+} __packed;
+
+/**
+ * struct zfcp_fc_rspn_req - container for ct header plus RSPN_ID request
+ * @ct_hdr: FC GS common transport header
+ * @rspn: RSPN_ID request
+ * @name: The name string of the RSPN_ID request
+ */
+struct zfcp_fc_rspn_req {
+        struct fc_ct_hdr        ct_hdr;
+        struct fc_ns_rspn       rspn;
+        char                    name[FC_SYMBOLIC_NAME_SIZE];
+} __packed;
+
+/**
  * struct zfcp_fc_req - Container for FC ELS and CT requests sent from zfcp
  * @ct_els: data required for issuing fsf command
  * @sg_req: scatterlist entry for request data
@@ -107,6 +141,14 @@ struct zfcp_fc_req {
                         struct scatterlist sg_rsp2[ZFCP_FC_GPN_FT_NUM_BUFS - 1];
                         struct zfcp_fc_gpn_ft_req       req;
                 } gpn_ft;
+                struct {
+                        struct zfcp_fc_gspn_req         req;
+                        struct zfcp_fc_gspn_rsp         rsp;
+                } gspn;
+                struct {
+                        struct zfcp_fc_rspn_req         req;
+                        struct fc_ct_hdr                rsp;
+                } rspn;
         } u;
 };
 
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index dbba0827127f..2a4991d6d4d5 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -720,6 +720,7 @@ struct fc_function_template zfcp_transport_functions = {
         /* no functions registered for following dynamic attributes but
            directly set by LLDD */
         .show_host_port_type = 1,
+        .show_host_symbolic_name = 1,
         .show_host_speed = 1,
         .show_host_port_id = 1,
         .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),