1 files changed, 801 insertions, 480 deletions

diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index 701046c9bb3..37b85c67b11 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -31,123 +31,128 @@ MODULE_PARM_DESC(dbfsize,
 
 #define ZFCP_LOG_AREA			ZFCP_LOG_AREA_OTHER
 
-static int
-zfcp_dbf_stck(char *out_buf, const char *label, unsigned long long stck)
+static void zfcp_dbf_hexdump(debug_info_t *dbf, void *to, int to_len,
+			     int level, char *from, int from_len)
+{
+	int offset;
+	struct zfcp_dbf_dump *dump = to;
+	int room = to_len - sizeof(*dump);
+
+	for (offset = 0; offset < from_len; offset += dump->size) {
+		memset(to, 0, to_len);
+		strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
+		dump->total_size = from_len;
+		dump->offset = offset;
+		dump->size = min(from_len - offset, room);
+		memcpy(dump->data, from + offset, dump->size);
+		debug_event(dbf, level, dump, dump->size);
+	}
+}
+
+/* FIXME: this duplicate this code in s390 debug feature */
+static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
 {
 	unsigned long long sec;
-	struct timespec dbftime;
-	int len = 0;
 
 	stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
 	sec = stck >> 12;
 	do_div(sec, 1000000);
-	dbftime.tv_sec = sec;
+	time->tv_sec = sec;
 	stck -= (sec * 1000000) << 12;
-	dbftime.tv_nsec = ((stck * 1000) >> 12);
-	len += sprintf(out_buf + len, "%-24s%011lu:%06lu\n",
-		       label, dbftime.tv_sec, dbftime.tv_nsec);
-
-	return len;
+	time->tv_nsec = ((stck * 1000) >> 12);
 }
 
-static int zfcp_dbf_tag(char *out_buf, const char *label, const char *tag)
+static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
 {
-	int len = 0, i;
+	int i;
 
-	len += sprintf(out_buf + len, "%-24s", label);
+	*p += sprintf(*p, "%-24s", label);
 	for (i = 0; i < ZFCP_DBF_TAG_SIZE; i++)
-		len += sprintf(out_buf + len, "%c", tag[i]);
-	len += sprintf(out_buf + len, "\n");
+		*p += sprintf(*p, "%c", tag[i]);
+	*p += sprintf(*p, "\n");
+}
 
-	return len;
+static void zfcp_dbf_outs(char **buf, const char *s1, const char *s2)
+{
+	*buf += sprintf(*buf, "%-24s%s\n", s1, s2);
 }
 
-static int
-zfcp_dbf_view(char *out_buf, const char *label, const char *format, ...)
+static void zfcp_dbf_out(char **buf, const char *s, const char *format, ...)
 {
 	va_list arg;
-	int len = 0;
 
-	len += sprintf(out_buf + len, "%-24s", label);
+	*buf += sprintf(*buf, "%-24s", s);
 	va_start(arg, format);
-	len += vsprintf(out_buf + len, format, arg);
+	*buf += vsprintf(*buf, format, arg);
 	va_end(arg);
-	len += sprintf(out_buf + len, "\n");
-
-	return len;
+	*buf += sprintf(*buf, "\n");
 }
 
-static int
-zfcp_dbf_view_dump(char *out_buf, const char *label,
-		   char *buffer, int buflen, int offset, int total_size)
+static void zfcp_dbf_outd(char **p, const char *label, char *buffer,
+			  int buflen, int offset, int total_size)
 {
-	int len = 0;
-
-	if (offset == 0)
-		len += sprintf(out_buf + len, "%-24s  ", label);
-
+	if (!offset)
+		*p += sprintf(*p, "%-24s  ", label);
 	while (buflen--) {
 		if (offset > 0) {
 			if ((offset % 32) == 0)
-				len += sprintf(out_buf + len, "\n%-24c  ", ' ');
+				*p += sprintf(*p, "\n%-24c  ", ' ');
 			else if ((offset % 4) == 0)
-				len += sprintf(out_buf + len, " ");
+				*p += sprintf(*p, " ");
 		}
-		len += sprintf(out_buf + len, "%02x", *buffer++);
+		*p += sprintf(*p, "%02x", *buffer++);
 		if (++offset == total_size) {
-			len += sprintf(out_buf + len, "\n");
+			*p += sprintf(*p, "\n");
 			break;
 		}
 	}
-
-	if (total_size == 0)
-		len += sprintf(out_buf + len, "\n");
-
-	return len;
+	if (!total_size)
+		*p += sprintf(*p, "\n");
 }
 
-static int
-zfcp_dbf_view_header(debug_info_t * id, struct debug_view *view, int area,
-		     debug_entry_t * entry, char *out_buf)
+static int zfcp_dbf_view_header(debug_info_t *id, struct debug_view *view,
+				int area, debug_entry_t *entry, char *out_buf)
 {
 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)DEBUG_DATA(entry);
-	int len = 0;
+	struct timespec t;
+	char *p = out_buf;
 
 	if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
-		len += zfcp_dbf_stck(out_buf + len, "timestamp",
-				     entry->id.stck);
-		len += zfcp_dbf_view(out_buf + len, "cpu", "%02i",
-				     entry->id.fields.cpuid);
-	} else {
-		len += zfcp_dbf_view_dump(out_buf + len, NULL,
-					  dump->data,
-					  dump->size,
-					  dump->offset, dump->total_size);
+		zfcp_dbf_timestamp(entry->id.stck, &t);
+		zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
+			     t.tv_sec, t.tv_nsec);
+		zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
+	} else	{
+		zfcp_dbf_outd(&p, NULL, dump->data, dump->size, dump->offset,
+			      dump->total_size);
 		if ((dump->offset + dump->size) == dump->total_size)
-			len += sprintf(out_buf + len, "\n");
+			p += sprintf(p, "\n");
 	}
-
-	return len;
+	return p - out_buf;
 }
 
+/**
+ * zfcp_hba_dbf_event_fsf_response - trace event for request completion
+ * @fsf_req: request that has been completed
+ */
 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_adapter *adapter = fsf_req->adapter;
 	struct fsf_qtcb *qtcb = fsf_req->qtcb;
 	union fsf_prot_status_qual *prot_status_qual =
-	    &qtcb->prefix.prot_status_qual;
+					&qtcb->prefix.prot_status_qual;
 	union fsf_status_qual *fsf_status_qual = &qtcb->header.fsf_status_qual;
 	struct scsi_cmnd *scsi_cmnd;
 	struct zfcp_port *port;
 	struct zfcp_unit *unit;
 	struct zfcp_send_els *send_els;
 	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
-	struct zfcp_hba_dbf_record_response *response = &rec->type.response;
+	struct zfcp_hba_dbf_record_response *response = &rec->u.response;
 	int level;
 	unsigned long flags;
 
 	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
-	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
+	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 
 	if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
@@ -161,6 +166,9 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 		   (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
 		strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
 		level = 4;
+	} else if (qtcb->header.log_length) {
+		strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
+		level = 5;
 	} else {
 		strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
 		level = 6;
@@ -188,11 +196,9 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 		if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 			break;
 		scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
-		if (scsi_cmnd != NULL) {
-			response->data.send_fcp.scsi_cmnd
-			    = (unsigned long)scsi_cmnd;
-			response->data.send_fcp.scsi_serial
-			    = scsi_cmnd->serial_number;
+		if (scsi_cmnd) {
+			response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
+			response->u.fcp.serial = scsi_cmnd->serial_number;
 		}
 		break;
 
@@ -200,25 +206,25 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 	case FSF_QTCB_CLOSE_PORT:
 	case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 		port = (struct zfcp_port *)fsf_req->data;
-		response->data.port.wwpn = port->wwpn;
-		response->data.port.d_id = port->d_id;
-		response->data.port.port_handle = qtcb->header.port_handle;
+		response->u.port.wwpn = port->wwpn;
+		response->u.port.d_id = port->d_id;
+		response->u.port.port_handle = qtcb->header.port_handle;
 		break;
 
 	case FSF_QTCB_OPEN_LUN:
 	case FSF_QTCB_CLOSE_LUN:
 		unit = (struct zfcp_unit *)fsf_req->data;
 		port = unit->port;
-		response->data.unit.wwpn = port->wwpn;
-		response->data.unit.fcp_lun = unit->fcp_lun;
-		response->data.unit.port_handle = qtcb->header.port_handle;
-		response->data.unit.lun_handle = qtcb->header.lun_handle;
+		response->u.unit.wwpn = port->wwpn;
+		response->u.unit.fcp_lun = unit->fcp_lun;
+		response->u.unit.port_handle = qtcb->header.port_handle;
+		response->u.unit.lun_handle = qtcb->header.lun_handle;
 		break;
 
 	case FSF_QTCB_SEND_ELS:
 		send_els = (struct zfcp_send_els *)fsf_req->data;
-		response->data.send_els.d_id = qtcb->bottom.support.d_id;
-		response->data.send_els.ls_code = send_els->ls_code >> 24;
+		response->u.els.d_id = qtcb->bottom.support.d_id;
+		response->u.els.ls_code = send_els->ls_code >> 24;
 		break;
 
 	case FSF_QTCB_ABORT_FCP_CMND:
@@ -230,39 +236,54 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 		break;
 	}
 
-	debug_event(adapter->hba_dbf, level,
-		    rec, sizeof(struct zfcp_hba_dbf_record));
+	debug_event(adapter->hba_dbf, level, rec, sizeof(*rec));
+
+	/* have fcp channel microcode fixed to use as little as possible */
+	if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
+		/* adjust length skipping trailing zeros */
+		char *buf = (char *)qtcb + qtcb->header.log_start;
+		int len = qtcb->header.log_length;
+		for (; len && !buf[len - 1]; len--);
+		zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
+				 buf, len);
+	}
+
 	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 }
 
-void
-zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
-			     struct fsf_status_read_buffer *status_buffer)
+/**
+ * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
+ * @tag: tag indicating which kind of unsolicited status has been received
+ * @adapter: adapter that has issued the unsolicited status buffer
+ * @status_buffer: buffer containing payload of unsolicited status
+ */
+void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
+				  struct fsf_status_read_buffer *status_buffer)
 {
 	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
 	unsigned long flags;
 
 	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
-	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
+	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 	strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 
-	rec->type.status.failed = adapter->status_read_failed;
+	rec->u.status.failed = adapter->status_read_failed;
 	if (status_buffer != NULL) {
-		rec->type.status.status_type = status_buffer->status_type;
-		rec->type.status.status_subtype = status_buffer->status_subtype;
-		memcpy(&rec->type.status.queue_designator,
+		rec->u.status.status_type = status_buffer->status_type;
+		rec->u.status.status_subtype = status_buffer->status_subtype;
+		memcpy(&rec->u.status.queue_designator,
 		       &status_buffer->queue_designator,
 		       sizeof(struct fsf_queue_designator));
 
 		switch (status_buffer->status_type) {
 		case FSF_STATUS_READ_SENSE_DATA_AVAIL:
-			rec->type.status.payload_size =
+			rec->u.status.payload_size =
 			    ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL;
 			break;
 
 		case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
-			rec->type.status.payload_size =
+			rec->u.status.payload_size =
 			    ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD;
 			break;
 
@@ -270,119 +291,101 @@ zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 			switch (status_buffer->status_subtype) {
 			case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
 			case FSF_STATUS_READ_SUB_FDISC_FAILED:
-				rec->type.status.payload_size =
+				rec->u.status.payload_size =
 					sizeof(struct fsf_link_down_info);
 			}
 			break;
 
 		case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
-			rec->type.status.payload_size =
+			rec->u.status.payload_size =
 			    ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
 			break;
 		}
-		memcpy(&rec->type.status.payload,
-		       &status_buffer->payload, rec->type.status.payload_size);
+		memcpy(&rec->u.status.payload,
+		       &status_buffer->payload, rec->u.status.payload_size);
 	}
 
-	debug_event(adapter->hba_dbf, 2,
-		    rec, sizeof(struct zfcp_hba_dbf_record));
+	debug_event(adapter->hba_dbf, 2, rec, sizeof(*rec));
 	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 }
 
-void
-zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
-			unsigned int qdio_error, unsigned int siga_error,
-			int sbal_index, int sbal_count)
+/**
+ * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
+ * @adapter: adapter affected by this QDIO related event
+ * @status: as passed by qdio module
+ * @qdio_error: as passed by qdio module
+ * @siga_error: as passed by qdio module
+ * @sbal_index: first buffer with error condition, as passed by qdio module
+ * @sbal_count: number of buffers affected, as passed by qdio module
+ */
+void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
+			     unsigned int qdio_error, unsigned int siga_error,
+			     int sbal_index, int sbal_count)
 {
-	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
+	struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
 	unsigned long flags;
 
 	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
-	memset(rec, 0, sizeof(struct zfcp_hba_dbf_record));
-	strncpy(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE);
-	rec->type.qdio.status = status;
-	rec->type.qdio.qdio_error = qdio_error;
-	rec->type.qdio.siga_error = siga_error;
-	rec->type.qdio.sbal_index = sbal_index;
-	rec->type.qdio.sbal_count = sbal_count;
-	debug_event(adapter->hba_dbf, 0,
-		    rec, sizeof(struct zfcp_hba_dbf_record));
+	memset(r, 0, sizeof(*r));
+	strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
+	r->u.qdio.status = status;
+	r->u.qdio.qdio_error = qdio_error;
+	r->u.qdio.siga_error = siga_error;
+	r->u.qdio.sbal_index = sbal_index;
+	r->u.qdio.sbal_count = sbal_count;
+	debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
 	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
 }
 
-static int
-zfcp_hba_dbf_view_response(char *out_buf,
-			   struct zfcp_hba_dbf_record_response *rec)
-{
-	int len = 0;
-
-	len += zfcp_dbf_view(out_buf + len, "fsf_command", "0x%08x",
-			     rec->fsf_command);
-	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
-			     rec->fsf_reqid);
-	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
-			     rec->fsf_seqno);
-	len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
-	len += zfcp_dbf_view(out_buf + len, "fsf_prot_status", "0x%08x",
-			     rec->fsf_prot_status);
-	len += zfcp_dbf_view(out_buf + len, "fsf_status", "0x%08x",
-			     rec->fsf_status);
-	len += zfcp_dbf_view_dump(out_buf + len, "fsf_prot_status_qual",
-				  rec->fsf_prot_status_qual,
-				  FSF_PROT_STATUS_QUAL_SIZE,
-				  0, FSF_PROT_STATUS_QUAL_SIZE);
-	len += zfcp_dbf_view_dump(out_buf + len, "fsf_status_qual",
-				  rec->fsf_status_qual,
-				  FSF_STATUS_QUALIFIER_SIZE,
-				  0, FSF_STATUS_QUALIFIER_SIZE);
-	len += zfcp_dbf_view(out_buf + len, "fsf_req_status", "0x%08x",
-			     rec->fsf_req_status);
-	len += zfcp_dbf_view(out_buf + len, "sbal_first", "0x%02x",
-			     rec->sbal_first);
-	len += zfcp_dbf_view(out_buf + len, "sbal_curr", "0x%02x",
-			     rec->sbal_curr);
-	len += zfcp_dbf_view(out_buf + len, "sbal_last", "0x%02x",
-			     rec->sbal_last);
-	len += zfcp_dbf_view(out_buf + len, "pool", "0x%02x", rec->pool);
-
-	switch (rec->fsf_command) {
+static void zfcp_hba_dbf_view_response(char **p,
+				       struct zfcp_hba_dbf_record_response *r)
+{
+	struct timespec t;
+
+	zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
+	zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
+	zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
+	zfcp_dbf_timestamp(r->fsf_issued, &t);
+	zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
+	zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
+	zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
+	zfcp_dbf_outd(p, "fsf_prot_status_qual", r->fsf_prot_status_qual,
+		      FSF_PROT_STATUS_QUAL_SIZE, 0, FSF_PROT_STATUS_QUAL_SIZE);
+	zfcp_dbf_outd(p, "fsf_status_qual", r->fsf_status_qual,
+		      FSF_STATUS_QUALIFIER_SIZE, 0, FSF_STATUS_QUALIFIER_SIZE);
+	zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
+	zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
+	zfcp_dbf_out(p, "sbal_curr", "0x%02x", r->sbal_curr);
+	zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
+	zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
+
+	switch (r->fsf_command) {
 	case FSF_QTCB_FCP_CMND:
-		if (rec->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
+		if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
 			break;
-		len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
-				     rec->data.send_fcp.scsi_cmnd);
-		len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
-				     rec->data.send_fcp.scsi_serial);
+		zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
+		zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
 		break;
 
 	case FSF_QTCB_OPEN_PORT_WITH_DID:
 	case FSF_QTCB_CLOSE_PORT:
 	case FSF_QTCB_CLOSE_PHYSICAL_PORT:
-		len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
-				     rec->data.port.wwpn);
-		len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
-				     rec->data.port.d_id);
-		len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
-				     rec->data.port.port_handle);
+		zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.port.wwpn);
+		zfcp_dbf_out(p, "d_id", "0x%06x", r->u.port.d_id);
+		zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.port.port_handle);
 		break;
 
 	case FSF_QTCB_OPEN_LUN:
 	case FSF_QTCB_CLOSE_LUN:
-		len += zfcp_dbf_view(out_buf + len, "wwpn", "0x%016Lx",
-				     rec->data.unit.wwpn);
-		len += zfcp_dbf_view(out_buf + len, "fcp_lun", "0x%016Lx",
-				     rec->data.unit.fcp_lun);
-		len += zfcp_dbf_view(out_buf + len, "port_handle", "0x%08x",
-				     rec->data.unit.port_handle);
-		len += zfcp_dbf_view(out_buf + len, "lun_handle", "0x%08x",
-				     rec->data.unit.lun_handle);
+		zfcp_dbf_out(p, "wwpn", "0x%016Lx", r->u.unit.wwpn);
+		zfcp_dbf_out(p, "fcp_lun", "0x%016Lx", r->u.unit.fcp_lun);
+		zfcp_dbf_out(p, "port_handle", "0x%08x", r->u.unit.port_handle);
+		zfcp_dbf_out(p, "lun_handle", "0x%08x", r->u.unit.lun_handle);
 		break;
 
 	case FSF_QTCB_SEND_ELS:
-		len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x",
-				     rec->data.send_els.d_id);
-		len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
-				     rec->data.send_els.ls_code);
+		zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
+		zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
 		break;
 
 	case FSF_QTCB_ABORT_FCP_CMND:
@@ -393,74 +396,52 @@ zfcp_hba_dbf_view_response(char *out_buf,
 	case FSF_QTCB_UPLOAD_CONTROL_FILE:
 		break;
 	}
-
-	return len;
 }
 
-static int
-zfcp_hba_dbf_view_status(char *out_buf, struct zfcp_hba_dbf_record_status *rec)
+static void zfcp_hba_dbf_view_status(char **p,
+				     struct zfcp_hba_dbf_record_status *r)
 {
-	int len = 0;
-
-	len += zfcp_dbf_view(out_buf + len, "failed", "0x%02x", rec->failed);
-	len += zfcp_dbf_view(out_buf + len, "status_type", "0x%08x",
-			     rec->status_type);
-	len += zfcp_dbf_view(out_buf + len, "status_subtype", "0x%08x",
-			     rec->status_subtype);
-	len += zfcp_dbf_view_dump(out_buf + len, "queue_designator",
-				  (char *)&rec->queue_designator,
-				  sizeof(struct fsf_queue_designator),
-				  0, sizeof(struct fsf_queue_designator));
-	len += zfcp_dbf_view_dump(out_buf + len, "payload",
-				  (char *)&rec->payload,
-				  rec->payload_size, 0, rec->payload_size);
-
-	return len;
+	zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
+	zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
+	zfcp_dbf_out(p, "status_subtype", "0x%08x", r->status_subtype);
+	zfcp_dbf_outd(p, "queue_designator", (char *)&r->queue_designator,
+		      sizeof(struct fsf_queue_designator), 0,
+		      sizeof(struct fsf_queue_designator));
+	zfcp_dbf_outd(p, "payload", (char *)&r->payload, r->payload_size, 0,
+		      r->payload_size);
 }
 
-static int
-zfcp_hba_dbf_view_qdio(char *out_buf, struct zfcp_hba_dbf_record_qdio *rec)
+static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
 {
-	int len = 0;
-
-	len += zfcp_dbf_view(out_buf + len, "status", "0x%08x", rec->status);
-	len += zfcp_dbf_view(out_buf + len, "qdio_error", "0x%08x",
-			     rec->qdio_error);
-	len += zfcp_dbf_view(out_buf + len, "siga_error", "0x%08x",
-			     rec->siga_error);
-	len += zfcp_dbf_view(out_buf + len, "sbal_index", "0x%02x",
-			     rec->sbal_index);
-	len += zfcp_dbf_view(out_buf + len, "sbal_count", "0x%02x",
-			     rec->sbal_count);
-
-	return len;
+	zfcp_dbf_out(p, "status", "0x%08x", r->status);
+	zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
+	zfcp_dbf_out(p, "siga_error", "0x%08x", r->siga_error);
+	zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
+	zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 }
 
-static int
-zfcp_hba_dbf_view_format(debug_info_t * id, struct debug_view *view,
-			 char *out_buf, const char *in_buf)
+static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
+				    char *out_buf, const char *in_buf)
 {
-	struct zfcp_hba_dbf_record *rec = (struct zfcp_hba_dbf_record *)in_buf;
-	int len = 0;
+	struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
+	char *p = out_buf;
 
-	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
+	if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 		return 0;
 
-	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
-	if (isalpha(rec->tag2[0]))
-		len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
-	if (strncmp(rec->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
-		len += zfcp_hba_dbf_view_response(out_buf + len,
-						  &rec->type.response);
-	else if (strncmp(rec->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
-		len += zfcp_hba_dbf_view_status(out_buf + len,
-						&rec->type.status);
-	else if (strncmp(rec->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
-		len += zfcp_hba_dbf_view_qdio(out_buf + len, &rec->type.qdio);
+	zfcp_dbf_tag(&p, "tag", r->tag);
+	if (isalpha(r->tag2[0]))
+		zfcp_dbf_tag(&p, "tag2", r->tag2);
 
-	len += sprintf(out_buf + len, "\n");
+	if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
+		zfcp_hba_dbf_view_response(&p, &r->u.response);
+	else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
+		zfcp_hba_dbf_view_status(&p, &r->u.status);
+	else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
+		zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
 
-	return len;
+	p += sprintf(p, "\n");
+	return p - out_buf;
 }
 
 static struct debug_view zfcp_hba_dbf_view = {
@@ -472,219 +453,570 @@ static struct debug_view zfcp_hba_dbf_view = {
 	NULL
 };
 
-static void
-_zfcp_san_dbf_event_common_ct(const char *tag, struct zfcp_fsf_req *fsf_req,
-			      u32 s_id, u32 d_id, void *buffer, int buflen)
+static const char *zfcp_rec_dbf_tags[] = {
+	[ZFCP_REC_DBF_ID_THREAD] = "thread",
+	[ZFCP_REC_DBF_ID_TARGET] = "target",
+	[ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
+	[ZFCP_REC_DBF_ID_ACTION] = "action",
+};
+
+static const char *zfcp_rec_dbf_ids[] = {
+	[1]	= "new",
+	[2]	= "ready",
+	[3]	= "kill",
+	[4]	= "down sleep",
+	[5]	= "down wakeup",
+	[6]	= "down sleep ecd",
+	[7]	= "down wakeup ecd",
+	[8]	= "down sleep epd",
+	[9]	= "down wakeup epd",
+	[10]	= "online",
+	[11]	= "operational",
+	[12]	= "scsi slave destroy",
+	[13]	= "propagate failed adapter",
+	[14]	= "propagate failed port",
+	[15]	= "block adapter",
+	[16]	= "unblock adapter",
+	[17]	= "block port",
+	[18]	= "unblock port",
+	[19]	= "block unit",
+	[20]	= "unblock unit",
+	[21]	= "unit recovery failed",
+	[22]	= "port recovery failed",
+	[23]	= "adapter recovery failed",
+	[24]	= "qdio queues down",
+	[25]	= "p2p failed",
+	[26]	= "nameserver lookup failed",
+	[27]	= "nameserver port failed",
+	[28]	= "link up",
+	[29]	= "link down",
+	[30]	= "link up status read",
+	[31]	= "open port failed",
+	[32]	= "open port failed",
+	[33]	= "close port",
+	[34]	= "open unit failed",
+	[35]	= "exclusive open unit failed",
+	[36]	= "shared open unit failed",
+	[37]	= "link down",
+	[38]	= "link down status read no link",
+	[39]	= "link down status read fdisc login",
+	[40]	= "link down status read firmware update",
+	[41]	= "link down status read unknown reason",
+	[42]	= "link down ecd incomplete",
+	[43]	= "link down epd incomplete",
+	[44]	= "sysfs adapter recovery",
+	[45]	= "sysfs port recovery",
+	[46]	= "sysfs unit recovery",
+	[47]	= "port boxed abort",
+	[48]	= "unit boxed abort",
+	[49]	= "port boxed ct",
+	[50]	= "port boxed close physical",
+	[51]	= "port boxed open unit",
+	[52]	= "port boxed close unit",
+	[53]	= "port boxed fcp",
+	[54]	= "unit boxed fcp",
+	[55]	= "port access denied ct",
+	[56]	= "port access denied els",
+	[57]	= "port access denied open port",
+	[58]	= "port access denied close physical",
+	[59]	= "unit access denied open unit",
+	[60]	= "shared unit access denied open unit",
+	[61]	= "unit access denied fcp",
+	[62]	= "request timeout",
+	[63]	= "adisc link test reject or timeout",
+	[64]	= "adisc link test d_id changed",
+	[65]	= "adisc link test failed",
+	[66]	= "recovery out of memory",
+	[67]	= "adapter recovery repeated after state change",
+	[68]	= "port recovery repeated after state change",
+	[69]	= "unit recovery repeated after state change",
+	[70]	= "port recovery follow-up after successful adapter recovery",
+	[71]	= "adapter recovery escalation after failed adapter recovery",
+	[72]	= "port recovery follow-up after successful physical port "
+		  "recovery",
+	[73]	= "adapter recovery escalation after failed physical port "
+		  "recovery",
+	[74]	= "unit recovery follow-up after successful port recovery",
+	[75]	= "physical port recovery escalation after failed port "
+		  "recovery",
+	[76]	= "port recovery escalation after failed unit recovery",
+	[77]	= "recovery opening nameserver port",
+	[78]	= "duplicate request id",
+	[79]	= "link down",
+	[80]	= "exclusive read-only unit access unsupported",
+	[81]	= "shared read-write unit access unsupported",
+	[82]	= "incoming rscn",
+	[83]	= "incoming plogi",
+	[84]	= "incoming logo",
+	[85]	= "online",
+	[86]	= "offline",
+	[87]	= "ccw device gone",
+	[88]	= "ccw device no path",
+	[89]	= "ccw device operational",
+	[90]	= "ccw device shutdown",
+	[91]	= "sysfs port addition",
+	[92]	= "sysfs port removal",
+	[93]	= "sysfs adapter recovery",
+	[94]	= "sysfs unit addition",
+	[95]	= "sysfs unit removal",
+	[96]	= "sysfs port recovery",
+	[97]	= "sysfs unit recovery",
+	[98]	= "sequence number mismatch",
+	[99]	= "link up",
+	[100]	= "error state",
+	[101]	= "status read physical port closed",
+	[102]	= "link up status read",
+	[103]	= "too many failed status read buffers",
+	[104]	= "port handle not valid abort",
+	[105]	= "lun handle not valid abort",
+	[106]	= "port handle not valid ct",
+	[107]	= "port handle not valid close port",
+	[108]	= "port handle not valid close physical port",
+	[109]	= "port handle not valid open unit",
+	[110]	= "port handle not valid close unit",
+	[111]	= "lun handle not valid close unit",
+	[112]	= "port handle not valid fcp",
+	[113]	= "lun handle not valid fcp",
+	[114]	= "handle mismatch fcp",
+	[115]	= "lun not valid fcp",
+	[116]	= "qdio send failed",
+	[117]	= "version mismatch",
+	[118]	= "incompatible qtcb type",
+	[119]	= "unknown protocol status",
+	[120]	= "unknown fsf command",
+	[121]	= "no recommendation for status qualifier",
+	[122]	= "status read physical port closed in error",
+	[123]	= "fc service class not supported ct",
+	[124]	= "fc service class not supported els",
+	[125]	= "need newer zfcp",
+	[126]	= "need newer microcode",
+	[127]	= "arbitrated loop not supported",
+	[128]	= "unknown topology",
+	[129]	= "qtcb size mismatch",
+	[130]	= "unknown fsf status ecd",
+	[131]	= "fcp request too big",
+	[132]	= "fc service class not supported fcp",
+	[133]	= "data direction not valid fcp",
+	[134]	= "command length not valid fcp",
+	[135]	= "status read act update",
+	[136]	= "status read cfdc update",
+	[137]	= "hbaapi port open",
+	[138]	= "hbaapi unit open",
+	[139]	= "hbaapi unit shutdown",
+	[140]	= "qdio error",
+	[141]	= "scsi host reset",
+	[142]	= "dismissing fsf request for recovery action",
+	[143]	= "recovery action timed out",
+	[144]	= "recovery action gone",
+	[145]	= "recovery action being processed",
+	[146]	= "recovery action ready for next step",
+};
+
+static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
+				    char *buf, const char *_rec)
+{
+	struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
+	char *p = buf;
+
+	zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
+	zfcp_dbf_outs(&p, "hint", zfcp_rec_dbf_ids[r->id2]);
+	zfcp_dbf_out(&p, "id", "%d", r->id2);
+	switch (r->id) {
+	case ZFCP_REC_DBF_ID_THREAD:
+		zfcp_dbf_out(&p, "total", "%d", r->u.thread.total);
+		zfcp_dbf_out(&p, "ready", "%d", r->u.thread.ready);
+		zfcp_dbf_out(&p, "running", "%d", r->u.thread.running);
+		break;
+	case ZFCP_REC_DBF_ID_TARGET:
+		zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.target.ref);
+		zfcp_dbf_out(&p, "status", "0x%08x", r->u.target.status);
+		zfcp_dbf_out(&p, "erp_count", "%d", r->u.target.erp_count);
+		zfcp_dbf_out(&p, "d_id", "0x%06x", r->u.target.d_id);
+		zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.target.wwpn);
+		zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.target.fcp_lun);
+		break;
+	case ZFCP_REC_DBF_ID_TRIGGER:
+		zfcp_dbf_out(&p, "reference", "0x%016Lx", r->u.trigger.ref);
+		zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.trigger.action);
+		zfcp_dbf_out(&p, "requested", "%d", r->u.trigger.want);
+		zfcp_dbf_out(&p, "executed", "%d", r->u.trigger.need);
+		zfcp_dbf_out(&p, "wwpn", "0x%016Lx", r->u.trigger.wwpn);
+		zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
+		zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
+		zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
+		zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
+		break;
+	case ZFCP_REC_DBF_ID_ACTION:
+		zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
+		zfcp_dbf_out(&p, "fsf_req", "0x%016Lx", r->u.action.fsf_req);
+		zfcp_dbf_out(&p, "status", "0x%08Lx", r->u.action.status);
+		zfcp_dbf_out(&p, "step", "0x%08Lx", r->u.action.step);
+		break;
+	}
+	p += sprintf(p, "\n");
+	return p - buf;
+}
+
+static struct debug_view zfcp_rec_dbf_view = {
+	"structured",
+	NULL,
+	&zfcp_dbf_view_header,
+	&zfcp_rec_dbf_view_format,
+	NULL,
+	NULL
+};
+
+/**
+ * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
+ * @id2: identifier for event
+ * @adapter: adapter
+ * @lock: non-zero value indicates that erp_lock has not yet been acquired
+ */
+void zfcp_rec_dbf_event_thread(u8 id2, struct zfcp_adapter *adapter, int lock)
+{
+	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
+	unsigned long flags = 0;
+	struct list_head *entry;
+	unsigned ready = 0, running = 0, total;
+
+	if (lock)
+		read_lock_irqsave(&adapter->erp_lock, flags);
+	list_for_each(entry, &adapter->erp_ready_head)
+		ready++;
+	list_for_each(entry, &adapter->erp_running_head)
+		running++;
+	total = adapter->erp_total_count;
+	if (lock)
+		read_unlock_irqrestore(&adapter->erp_lock, flags);
+
+	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	memset(r, 0, sizeof(*r));
+	r->id = ZFCP_REC_DBF_ID_THREAD;
+	r->id2 = id2;
+	r->u.thread.total = total;
+	r->u.thread.ready = ready;
+	r->u.thread.running = running;
+	debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
+	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
+}
+
+static void zfcp_rec_dbf_event_target(u8 id2, void *ref,
+				      struct zfcp_adapter *adapter,
+				      atomic_t *status, atomic_t *erp_count,
+				      u64 wwpn, u32 d_id, u64 fcp_lun)
+{
+	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
+	unsigned long flags;
+
+	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	memset(r, 0, sizeof(*r));
+	r->id = ZFCP_REC_DBF_ID_TARGET;
+	r->id2 = id2;
+	r->u.target.ref = (unsigned long)ref;
+	r->u.target.status = atomic_read(status);
+	r->u.target.wwpn = wwpn;
+	r->u.target.d_id = d_id;
+	r->u.target.fcp_lun = fcp_lun;
+	r->u.target.erp_count = atomic_read(erp_count);
+	debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
+	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
+}
+
+/**
+ * zfcp_rec_dbf_event_adapter - trace event for adapter state change
+ * @id: identifier for trigger of state change
+ * @ref: additional reference (e.g. request)
+ * @adapter: adapter
+ */
+void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *adapter)
+{
+	zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
+				  &adapter->erp_counter, 0, 0, 0);
+}
+
+/**
+ * zfcp_rec_dbf_event_port - trace event for port state change
+ * @id: identifier for trigger of state change
+ * @ref: additional reference (e.g. request)
+ * @port: port
+ */
+void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port)
 {
-	struct zfcp_send_ct *send_ct = (struct zfcp_send_ct *)fsf_req->data;
-	struct zfcp_port *port = send_ct->port;
 	struct zfcp_adapter *adapter = port->adapter;
-	struct ct_hdr *header = (struct ct_hdr *)buffer;
-	struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
-	struct zfcp_san_dbf_record_ct *ct = &rec->type.ct;
+
+	zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
+				  &port->erp_counter, port->wwpn, port->d_id,
+				  0);
+}
+
+/**
+ * zfcp_rec_dbf_event_unit - trace event for unit state change
+ * @id: identifier for trigger of state change
+ * @ref: additional reference (e.g. request)
+ * @unit: unit
+ */
+void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit)
+{
+	struct zfcp_port *port = unit->port;
+	struct zfcp_adapter *adapter = port->adapter;
+
+	zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
+				  &unit->erp_counter, port->wwpn, port->d_id,
+				  unit->fcp_lun);
+}
+
+/**
+ * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
+ * @id2: identifier for error recovery trigger
+ * @ref: additional reference (e.g. request)
+ * @want: originally requested error recovery action
+ * @need: error recovery action actually initiated
+ * @action: address of error recovery action struct
+ * @adapter: adapter
+ * @port: port
+ * @unit: unit
+ */
+void zfcp_rec_dbf_event_trigger(u8 id2, void *ref, u8 want, u8 need,
+				void *action, struct zfcp_adapter *adapter,
+				struct zfcp_port *port, struct zfcp_unit *unit)
+{
+	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
-	memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
-	strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
-	rec->fsf_reqid = (unsigned long)fsf_req;
-	rec->fsf_seqno = fsf_req->seq_no;
-	rec->s_id = s_id;
-	rec->d_id = d_id;
-	if (strncmp(tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
-		ct->type.request.cmd_req_code = header->cmd_rsp_code;
-		ct->type.request.revision = header->revision;
-		ct->type.request.gs_type = header->gs_type;
-		ct->type.request.gs_subtype = header->gs_subtype;
-		ct->type.request.options = header->options;
-		ct->type.request.max_res_size = header->max_res_size;
-	} else if (strncmp(tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
-		ct->type.response.cmd_rsp_code = header->cmd_rsp_code;
-		ct->type.response.revision = header->revision;
-		ct->type.response.reason_code = header->reason_code;
-		ct->type.response.reason_code_expl = header->reason_code_expl;
-		ct->type.response.vendor_unique = header->vendor_unique;
+	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	memset(r, 0, sizeof(*r));
+	r->id = ZFCP_REC_DBF_ID_TRIGGER;
+	r->id2 = id2;
+	r->u.trigger.ref = (unsigned long)ref;
+	r->u.trigger.want = want;
+	r->u.trigger.need = need;
+	r->u.trigger.action = (unsigned long)action;
+	r->u.trigger.as = atomic_read(&adapter->status);
+	if (port) {
+		r->u.trigger.ps = atomic_read(&port->status);
+		r->u.trigger.wwpn = port->wwpn;
 	}
-	ct->payload_size =
-	    min(buflen - (int)sizeof(struct ct_hdr), ZFCP_DBF_CT_PAYLOAD);
-	memcpy(ct->payload, buffer + sizeof(struct ct_hdr), ct->payload_size);
-	debug_event(adapter->san_dbf, 3,
-		    rec, sizeof(struct zfcp_san_dbf_record));
-	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
+	if (unit) {
+		r->u.trigger.us = atomic_read(&unit->status);
+		r->u.trigger.fcp_lun = unit->fcp_lun;
+	}
+	debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
+	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
 }
 
+/**
+ * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
+ * @id2: identifier
+ * @erp_action: error recovery action struct pointer
+ */
+void zfcp_rec_dbf_event_action(u8 id2, struct zfcp_erp_action *erp_action)
+{
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
+	unsigned long flags;
+
+	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	memset(r, 0, sizeof(*r));
+	r->id = ZFCP_REC_DBF_ID_ACTION;
+	r->id2 = id2;
+	r->u.action.action = (unsigned long)erp_action;
+	r->u.action.status = erp_action->status;
+	r->u.action.step = erp_action->step;
+	r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
+	debug_event(adapter->rec_dbf, 4, r, sizeof(*r));
+	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
+}
+
+/**
+ * zfcp_san_dbf_event_ct_request - trace event for issued CT request
+ * @fsf_req: request containing issued CT data
+ */
 void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 	struct zfcp_port *port = ct->port;
 	struct zfcp_adapter *adapter = port->adapter;
+	struct ct_hdr *hdr = zfcp_sg_to_address(ct->req);
+	struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
+	struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
+	unsigned long flags;
 
-	_zfcp_san_dbf_event_common_ct("octc", fsf_req,
-				      fc_host_port_id(adapter->scsi_host),
-				      port->d_id, zfcp_sg_to_address(ct->req),
-				      ct->req->length);
+	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
+	memset(r, 0, sizeof(*r));
+	strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
+	r->fsf_reqid = (unsigned long)fsf_req;
+	r->fsf_seqno = fsf_req->seq_no;
+	r->s_id = fc_host_port_id(adapter->scsi_host);
+	r->d_id = port->d_id;
+	oct->cmd_req_code = hdr->cmd_rsp_code;
+	oct->revision = hdr->revision;
+	oct->gs_type = hdr->gs_type;
+	oct->gs_subtype = hdr->gs_subtype;
+	oct->options = hdr->options;
+	oct->max_res_size = hdr->max_res_size;
+	oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
+		       ZFCP_DBF_CT_PAYLOAD);
+	memcpy(oct->payload, (void *)hdr + sizeof(struct ct_hdr), oct->len);
+	debug_event(adapter->san_dbf, 3, r, sizeof(*r));
+	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 }
 
+/**
+ * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
+ * @fsf_req: request containing CT response
+ */
 void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 	struct zfcp_port *port = ct->port;
 	struct zfcp_adapter *adapter = port->adapter;
+	struct ct_hdr *hdr = zfcp_sg_to_address(ct->resp);
+	struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
+	struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
+	unsigned long flags;
 
-	_zfcp_san_dbf_event_common_ct("rctc", fsf_req, port->d_id,
-				      fc_host_port_id(adapter->scsi_host),
-				      zfcp_sg_to_address(ct->resp),
-				      ct->resp->length);
+	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
+	memset(r, 0, sizeof(*r));
+	strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
+	r->fsf_reqid = (unsigned long)fsf_req;
+	r->fsf_seqno = fsf_req->seq_no;
+	r->s_id = port->d_id;
+	r->d_id = fc_host_port_id(adapter->scsi_host);
+	rct->cmd_rsp_code = hdr->cmd_rsp_code;
+	rct->revision = hdr->revision;
+	rct->reason_code = hdr->reason_code;
+	rct->expl = hdr->reason_code_expl;
+	rct->vendor_unique = hdr->vendor_unique;
+	rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
+		       ZFCP_DBF_CT_PAYLOAD);
+	memcpy(rct->payload, (void *)hdr + sizeof(struct ct_hdr), rct->len);
+	debug_event(adapter->san_dbf, 3, r, sizeof(*r));
+	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 }
 
-static void
-_zfcp_san_dbf_event_common_els(const char *tag, int level,
-			       struct zfcp_fsf_req *fsf_req, u32 s_id,
-			       u32 d_id, u8 ls_code, void *buffer, int buflen)
+static void zfcp_san_dbf_event_els(const char *tag, int level,
+				   struct zfcp_fsf_req *fsf_req, u32 s_id,
+				   u32 d_id, u8 ls_code, void *buffer,
+				   int buflen)
 {
 	struct zfcp_adapter *adapter = fsf_req->adapter;
 	struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
-	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 	unsigned long flags;
-	int offset = 0;
 
 	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
-	do {
-		memset(rec, 0, sizeof(struct zfcp_san_dbf_record));
-		if (offset == 0) {
-			strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
-			rec->fsf_reqid = (unsigned long)fsf_req;
-			rec->fsf_seqno = fsf_req->seq_no;
-			rec->s_id = s_id;
-			rec->d_id = d_id;
-			rec->type.els.ls_code = ls_code;
-			buflen = min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD);
-			rec->type.els.payload_size = buflen;
-			memcpy(rec->type.els.payload,
-			       buffer, min(buflen, ZFCP_DBF_ELS_PAYLOAD));
-			offset += min(buflen, ZFCP_DBF_ELS_PAYLOAD);
-		} else {
-			strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
-			dump->total_size = buflen;
-			dump->offset = offset;
-			dump->size = min(buflen - offset,
-					 (int)sizeof(struct zfcp_san_dbf_record)
-					 - (int)sizeof(struct zfcp_dbf_dump));
-			memcpy(dump->data, buffer + offset, dump->size);
-			offset += dump->size;
-		}
-		debug_event(adapter->san_dbf, level,
-			    rec, sizeof(struct zfcp_san_dbf_record));
-	} while (offset < buflen);
+	memset(rec, 0, sizeof(*rec));
+	strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
+	rec->fsf_reqid = (unsigned long)fsf_req;
+	rec->fsf_seqno = fsf_req->seq_no;
+	rec->s_id = s_id;
+	rec->d_id = d_id;
+	rec->u.els.ls_code = ls_code;
+	debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
+	zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
+			 buffer, min(buflen, ZFCP_DBF_ELS_MAX_PAYLOAD));
 	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
 }
 
+/**
+ * zfcp_san_dbf_event_els_request - trace event for issued ELS
+ * @fsf_req: request containing issued ELS
+ */
 void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 
-	_zfcp_san_dbf_event_common_els("oels", 2, fsf_req,
-				       fc_host_port_id(els->adapter->scsi_host),
-				       els->d_id,
-				       *(u8 *) zfcp_sg_to_address(els->req),
-				       zfcp_sg_to_address(els->req),
-				       els->req->length);
+	zfcp_san_dbf_event_els("oels", 2, fsf_req,
+			       fc_host_port_id(els->adapter->scsi_host),
+			       els->d_id, *(u8 *) zfcp_sg_to_address(els->req),
+			       zfcp_sg_to_address(els->req), els->req->length);
 }
 
+/**
+ * zfcp_san_dbf_event_els_response - trace event for completed ELS
+ * @fsf_req: request containing ELS response
+ */
 void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 
-	_zfcp_san_dbf_event_common_els("rels", 2, fsf_req, els->d_id,
-				       fc_host_port_id(els->adapter->scsi_host),
-				       *(u8 *) zfcp_sg_to_address(els->req),
-				       zfcp_sg_to_address(els->resp),
-				       els->resp->length);
+	zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
+			       fc_host_port_id(els->adapter->scsi_host),
+			       *(u8 *)zfcp_sg_to_address(els->req),
+			       zfcp_sg_to_address(els->resp),
+			       els->resp->length);
 }
 
+/**
+ * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
+ * @fsf_req: request containing unsolicited status buffer with incoming ELS
+ */
 void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_adapter *adapter = fsf_req->adapter;
-	struct fsf_status_read_buffer *status_buffer =
-	    (struct fsf_status_read_buffer *)fsf_req->data;
-	int length = (int)status_buffer->length -
-	    (int)((void *)&status_buffer->payload - (void *)status_buffer);
-
-	_zfcp_san_dbf_event_common_els("iels", 1, fsf_req, status_buffer->d_id,
-				       fc_host_port_id(adapter->scsi_host),
-				       *(u8 *) status_buffer->payload,
-				       (void *)status_buffer->payload, length);
+	struct fsf_status_read_buffer *buf =
+			(struct fsf_status_read_buffer *)fsf_req->data;
+	int length = (int)buf->length -
+		     (int)((void *)&buf->payload - (void *)buf);
+
+	zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
+			       fc_host_port_id(adapter->scsi_host),
+			       *(u8 *)buf->payload, (void *)buf->payload,
+			       length);
 }
 
-static int
-zfcp_san_dbf_view_format(debug_info_t * id, struct debug_view *view,
-			 char *out_buf, const char *in_buf)
+static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
+				    char *out_buf, const char *in_buf)
 {
-	struct zfcp_san_dbf_record *rec = (struct zfcp_san_dbf_record *)in_buf;
+	struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
 	char *buffer = NULL;
 	int buflen = 0, total = 0;
-	int len = 0;
+	char *p = out_buf;
 
-	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
+	if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 		return 0;
 
-	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
-	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
-			     rec->fsf_reqid);
-	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
-			     rec->fsf_seqno);
-	len += zfcp_dbf_view(out_buf + len, "s_id", "0x%06x", rec->s_id);
-	len += zfcp_dbf_view(out_buf + len, "d_id", "0x%06x", rec->d_id);
-
-	if (strncmp(rec->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
-		len += zfcp_dbf_view(out_buf + len, "cmd_req_code", "0x%04x",
-				     rec->type.ct.type.request.cmd_req_code);
-		len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
-				     rec->type.ct.type.request.revision);
-		len += zfcp_dbf_view(out_buf + len, "gs_type", "0x%02x",
-				     rec->type.ct.type.request.gs_type);
-		len += zfcp_dbf_view(out_buf + len, "gs_subtype", "0x%02x",
-				     rec->type.ct.type.request.gs_subtype);
-		len += zfcp_dbf_view(out_buf + len, "options", "0x%02x",
-				     rec->type.ct.type.request.options);
-		len += zfcp_dbf_view(out_buf + len, "max_res_size", "0x%04x",
-				     rec->type.ct.type.request.max_res_size);
-		total = rec->type.ct.payload_size;
-		buffer = rec->type.ct.payload;
+	zfcp_dbf_tag(&p, "tag", r->tag);
+	zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
+	zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
+	zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
+	zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
+
+	if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
+		struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
+		zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
+		zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
+		zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
+		zfcp_dbf_out(&p, "gs_subtype", "0x%02x", ct->gs_subtype);
+		zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
+		zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
+		total = ct->len;
+		buffer = ct->payload;
 		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
-	} else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
-		len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
-				     rec->type.ct.type.response.cmd_rsp_code);
-		len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
-				     rec->type.ct.type.response.revision);
-		len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
-				     rec->type.ct.type.response.reason_code);
-		len +=
-		    zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
-				  rec->type.ct.type.response.reason_code_expl);
-		len +=
-		    zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
-				  rec->type.ct.type.response.vendor_unique);
-		total = rec->type.ct.payload_size;
-		buffer = rec->type.ct.payload;
+	} else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
+		struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
+		zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
+		zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
+		zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
+		zfcp_dbf_out(&p, "reason_code_expl", "0x%02x", ct->expl);
+		zfcp_dbf_out(&p, "vendor_unique", "0x%02x", ct->vendor_unique);
+		total = ct->len;
+		buffer = ct->payload;
 		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
-	} else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
-		   strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
-		   strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
-		len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
-				     rec->type.els.ls_code);
-		total = rec->type.els.payload_size;
-		buffer = rec->type.els.payload;
+	} else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
+		   strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
+		   strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
+		struct zfcp_san_dbf_record_els *els = &r->u.els;
+		zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
+		total = els->len;
+		buffer = els->payload;
 		buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
 	}
 
-	len += zfcp_dbf_view_dump(out_buf + len, "payload",
-				  buffer, buflen, 0, total);
-
+	zfcp_dbf_outd(&p, "payload", buffer, buflen, 0, total);
 	if (buflen == total)
-		len += sprintf(out_buf + len, "\n");
+		p += sprintf(p, "\n");
 
-	return len;
+	return p - out_buf;
 }
 
 static struct debug_view zfcp_san_dbf_view = {
@@ -696,12 +1028,11 @@ static struct debug_view zfcp_san_dbf_view = {
 	NULL
 };
 
-static void
-_zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
-			    struct zfcp_adapter *adapter,
-			    struct scsi_cmnd *scsi_cmnd,
-			    struct zfcp_fsf_req *fsf_req,
-			    unsigned long old_req_id)
+static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
+				struct zfcp_adapter *adapter,
+				struct scsi_cmnd *scsi_cmnd,
+				struct zfcp_fsf_req *fsf_req,
+				unsigned long old_req_id)
 {
 	struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
@@ -712,7 +1043,7 @@ _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 
 	spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
 	do {
-		memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
+		memset(rec, 0, sizeof(*rec));
 		if (offset == 0) {
 			strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 			strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
@@ -738,20 +1069,16 @@ _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 				fcp_sns_info =
 				    zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 
-				rec->type.fcp.rsp_validity =
-				    fcp_rsp->validity.value;
-				rec->type.fcp.rsp_scsi_status =
-				    fcp_rsp->scsi_status;
-				rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
+				rec->rsp_validity = fcp_rsp->validity.value;
+				rec->rsp_scsi_status = fcp_rsp->scsi_status;
+				rec->rsp_resid = fcp_rsp->fcp_resid;
 				if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
-					rec->type.fcp.rsp_code =
-					    *(fcp_rsp_info + 3);
+					rec->rsp_code = *(fcp_rsp_info + 3);
 				if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
 					buflen = min((int)fcp_rsp->fcp_sns_len,
 						     ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
-					rec->type.fcp.sns_info_len = buflen;
-					memcpy(rec->type.fcp.sns_info,
-					       fcp_sns_info,
+					rec->sns_info_len = buflen;
+					memcpy(rec->sns_info, fcp_sns_info,
 					       min(buflen,
 						   ZFCP_DBF_SCSI_FCP_SNS_INFO));
 					offset += min(buflen,
@@ -762,7 +1089,7 @@ _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 				rec->fsf_seqno = fsf_req->seq_no;
 				rec->fsf_issued = fsf_req->issued;
 			}
-			rec->type.old_fsf_reqid = old_req_id;
+			rec->old_fsf_reqid = old_req_id;
 		} else {
 			strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
 			dump->total_size = buflen;
@@ -774,108 +1101,101 @@ _zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
 			memcpy(dump->data, fcp_sns_info + offset, dump->size);
 			offset += dump->size;
 		}
-		debug_event(adapter->scsi_dbf, level,
-			    rec, sizeof(struct zfcp_scsi_dbf_record));
+		debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
 	} while (offset < buflen);
 	spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
 }
 
-void
-zfcp_scsi_dbf_event_result(const char *tag, int level,
-			   struct zfcp_adapter *adapter,
-			   struct scsi_cmnd *scsi_cmnd,
-			   struct zfcp_fsf_req *fsf_req)
+/**
+ * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
+ * @tag: tag indicating success or failure of SCSI command
+ * @level: trace level applicable for this event
+ * @adapter: adapter that has been used to issue the SCSI command
+ * @scsi_cmnd: SCSI command pointer
+ * @fsf_req: request used to issue SCSI command (might be NULL)
+ */
+void zfcp_scsi_dbf_event_result(const char *tag, int level,
+				struct zfcp_adapter *adapter,
+				struct scsi_cmnd *scsi_cmnd,
+				struct zfcp_fsf_req *fsf_req)
 {
-	_zfcp_scsi_dbf_event_common("rslt", tag, level,
-			adapter, scsi_cmnd, fsf_req, 0);
+	zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
 }
 
-void
-zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
-			  struct scsi_cmnd *scsi_cmnd,
-			  struct zfcp_fsf_req *new_fsf_req,
-			  unsigned long old_req_id)
+/**
+ * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
+ * @tag: tag indicating success or failure of abort operation
+ * @adapter: adapter thas has been used to issue SCSI command to be aborted
+ * @scsi_cmnd: SCSI command to be aborted
+ * @new_fsf_req: request containing abort (might be NULL)
+ * @old_req_id: identifier of request containg SCSI command to be aborted
+ */
+void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
+			       struct scsi_cmnd *scsi_cmnd,
+			       struct zfcp_fsf_req *new_fsf_req,
+			       unsigned long old_req_id)
 {
-	_zfcp_scsi_dbf_event_common("abrt", tag, 1,
-			adapter, scsi_cmnd, new_fsf_req, old_req_id);
+	zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
+			    old_req_id);
 }
 
-void
-zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
-			     struct scsi_cmnd *scsi_cmnd)
+/**
+ * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
+ * @tag: tag indicating success or failure of reset operation
+ * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
+ * @unit: unit that needs reset
+ * @scsi_cmnd: SCSI command which caused this error recovery
+ */
+void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
+				  struct zfcp_unit *unit,
+				  struct scsi_cmnd *scsi_cmnd)
 {
-	struct zfcp_adapter *adapter = unit->port->adapter;
-
-	_zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
-			tag, 1, adapter, scsi_cmnd, NULL, 0);
+	zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
+			    unit->port->adapter, scsi_cmnd, NULL, 0);
 }
 
-static int
-zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
-			  char *out_buf, const char *in_buf)
+static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
+				     char *out_buf, const char *in_buf)
 {
-	struct zfcp_scsi_dbf_record *rec =
-	    (struct zfcp_scsi_dbf_record *)in_buf;
-	int len = 0;
+	struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
+	struct timespec t;
+	char *p = out_buf;
 
-	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
+	if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
 		return 0;
 
-	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
-	len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
-	len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
-	len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
-			     rec->scsi_lun);
-	len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
-			     rec->scsi_result);
-	len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
-			     rec->scsi_cmnd);
-	len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
-			     rec->scsi_serial);
-	len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
-				  rec->scsi_opcode,
-				  ZFCP_DBF_SCSI_OPCODE,
-				  0, ZFCP_DBF_SCSI_OPCODE);
-	len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
-			     rec->scsi_retries);
-	len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
-			     rec->scsi_allowed);
-	if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
-		len += zfcp_dbf_view(out_buf + len, "old_fsf_reqid", "0x%0Lx",
-				     rec->type.old_fsf_reqid);
-	}
-	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
-			     rec->fsf_reqid);
-	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
-			     rec->fsf_seqno);
-	len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
-	if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
-		len +=
-		    zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
-				  rec->type.fcp.rsp_validity);
-		len +=
-		    zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
-				  "0x%02x", rec->type.fcp.rsp_scsi_status);
-		len +=
-		    zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
-				  rec->type.fcp.rsp_resid);
-		len +=
-		    zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
-				  rec->type.fcp.rsp_code);
-		len +=
-		    zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
-				  rec->type.fcp.sns_info_len);
-		len +=
-		    zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
-				       rec->type.fcp.sns_info,
-				       min((int)rec->type.fcp.sns_info_len,
-					   ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
-				       rec->type.fcp.sns_info_len);
+	zfcp_dbf_tag(&p, "tag", r->tag);
+	zfcp_dbf_tag(&p, "tag2", r->tag2);
+	zfcp_dbf_out(&p, "scsi_id", "0x%08x", r->scsi_id);
+	zfcp_dbf_out(&p, "scsi_lun", "0x%08x", r->scsi_lun);
+	zfcp_dbf_out(&p, "scsi_result", "0x%08x", r->scsi_result);
+	zfcp_dbf_out(&p, "scsi_cmnd", "0x%0Lx", r->scsi_cmnd);
+	zfcp_dbf_out(&p, "scsi_serial", "0x%016Lx", r->scsi_serial);
+	zfcp_dbf_outd(&p, "scsi_opcode", r->scsi_opcode, ZFCP_DBF_SCSI_OPCODE,
+		      0, ZFCP_DBF_SCSI_OPCODE);
+	zfcp_dbf_out(&p, "scsi_retries", "0x%02x", r->scsi_retries);
+	zfcp_dbf_out(&p, "scsi_allowed", "0x%02x", r->scsi_allowed);
+	if (strncmp(r->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0)
+		zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
+	zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
+	zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
+	zfcp_dbf_timestamp(r->fsf_issued, &t);
+	zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
+
+	if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
+		zfcp_dbf_out(&p, "fcp_rsp_validity", "0x%02x", r->rsp_validity);
+		zfcp_dbf_out(&p, "fcp_rsp_scsi_status", "0x%02x",
+			     r->rsp_scsi_status);
+		zfcp_dbf_out(&p, "fcp_rsp_resid", "0x%08x", r->rsp_resid);
+		zfcp_dbf_out(&p, "fcp_rsp_code", "0x%08x", r->rsp_code);
+		zfcp_dbf_out(&p, "fcp_sns_info_len", "0x%08x", r->sns_info_len);
+		zfcp_dbf_outd(&p, "fcp_sns_info", r->sns_info,
+			      min((int)r->sns_info_len,
+			      ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
+			      r->sns_info_len);
 	}
-
-	len += sprintf(out_buf + len, "\n");
-
-	return len;
+	p += sprintf(p, "\n");
+	return p - out_buf;
 }
 
 static struct debug_view zfcp_scsi_dbf_view = {
@@ -897,13 +1217,14 @@ int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
 	char dbf_name[DEBUG_MAX_NAME_LEN];
 
 	/* debug feature area which records recovery activity */
-	sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
-	adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
-					  sizeof(struct zfcp_erp_dbf_record));
-	if (!adapter->erp_dbf)
+	sprintf(dbf_name, "zfcp_%s_rec", zfcp_get_busid_by_adapter(adapter));
+	adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
+					  sizeof(struct zfcp_rec_dbf_record));
+	if (!adapter->rec_dbf)
 		goto failed;
-	debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
-	debug_set_level(adapter->erp_dbf, 3);
+	debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
+	debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
+	debug_set_level(adapter->rec_dbf, 3);
 
 	/* debug feature area which records HBA (FSF and QDIO) conditions */
 	sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
@@ -952,11 +1273,11 @@ void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
 	debug_unregister(adapter->scsi_dbf);
 	debug_unregister(adapter->san_dbf);
 	debug_unregister(adapter->hba_dbf);
-	debug_unregister(adapter->erp_dbf);
+	debug_unregister(adapter->rec_dbf);
 	adapter->scsi_dbf = NULL;
 	adapter->san_dbf = NULL;
 	adapter->hba_dbf = NULL;
-	adapter->erp_dbf = NULL;
+	adapter->rec_dbf = NULL;
 }
 
 #undef ZFCP_LOG_AREA