scsi: lpfc: Enhance driver logging for selected discovery events

Typically, debugging discovery issues requires the ndlp reference count,
nlp flags, transport flags, and the io tag for root cause analysis.

Modify important discovery log messages to include one or more of these
attributes to aid in debugging and support.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20231031191224.150862-8-justintee8345@gmail.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 31 insertions, 18 deletions

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 0829fe6ddff8..f04326db8c19 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -2062,8 +2062,9 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	/* PLOGI completes to NPort <nlp_DID> */
 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 			 "0102 PLOGI completes to NPort x%06x "
-			 "Data: x%x x%x x%x x%x x%x\n",
-			 ndlp->nlp_DID, ndlp->nlp_fc4_type,
+			 "IoTag x%x Data: x%x x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, iotag,
+			 ndlp->nlp_fc4_type,
 			 ulp_status, ulp_word4,
 			 disc, vport->num_disc_nodes);
 
@@ -2362,9 +2363,10 @@ lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	/* PRLI completes to NPort <nlp_DID> */
 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 			 "0103 PRLI completes to NPort x%06x "
-			 "Data: x%x x%x x%x x%x\n",
+			 "Data: x%x x%x x%x x%x x%x\n",
 			 ndlp->nlp_DID, ulp_status, ulp_word4,
-			 vport->num_disc_nodes, ndlp->fc4_prli_sent);
+			 vport->num_disc_nodes, ndlp->fc4_prli_sent,
+			 ndlp->fc4_xpt_flags);
 
 	/* Check to see if link went down during discovery */
 	if (lpfc_els_chk_latt(vport))
@@ -2805,7 +2807,7 @@ lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	IOCB_t *irsp;
 	struct lpfc_nodelist *ndlp;
 	int  disc;
-	u32 ulp_status, ulp_word4, tmo;
+	u32 ulp_status, ulp_word4, tmo, iotag;
 	bool release_node = false;
 
 	/* we pass cmdiocb to state machine which needs rspiocb as well */
@@ -2818,9 +2820,11 @@ lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 
 	if (phba->sli_rev == LPFC_SLI_REV4) {
 		tmo = get_wqe_tmo(cmdiocb);
+		iotag = get_wqe_reqtag(cmdiocb);
 	} else {
 		irsp = &rspiocb->iocb;
 		tmo = irsp->ulpTimeout;
+		iotag = irsp->ulpIoTag;
 	}
 
 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
@@ -2838,9 +2842,11 @@ lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	/* ADISC completes to NPort <nlp_DID> */
 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 			 "0104 ADISC completes to NPort x%x "
-			 "Data: x%x x%x x%x x%x x%x\n",
-			 ndlp->nlp_DID, ulp_status, ulp_word4,
+			 "IoTag x%x Data: x%x x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, iotag,
+			 ulp_status, ulp_word4,
 			 tmo, disc, vport->num_disc_nodes);
+
 	/* Check to see if link went down during discovery */
 	if (lpfc_els_chk_latt(vport)) {
 		spin_lock_irq(&ndlp->lock);
@@ -3001,7 +3007,7 @@ lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	int wake_up_waiter = 0;
 	u32 ulp_status;
 	u32 ulp_word4;
-	u32 tmo;
+	u32 tmo, iotag;
 
 	/* we pass cmdiocb to state machine which needs rspiocb as well */
 	cmdiocb->rsp_iocb = rspiocb;
@@ -3011,9 +3017,11 @@ lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 
 	if (phba->sli_rev == LPFC_SLI_REV4) {
 		tmo = get_wqe_tmo(cmdiocb);
+		iotag = get_wqe_reqtag(cmdiocb);
 	} else {
 		irsp = &rspiocb->iocb;
 		tmo = irsp->ulpTimeout;
+		iotag = irsp->ulpIoTag;
 	}
 
 	spin_lock_irq(&ndlp->lock);
@@ -3032,9 +3040,11 @@ lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	/* LOGO completes to NPort <nlp_DID> */
 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 			 "0105 LOGO completes to NPort x%x "
-			 "refcnt %d nflags x%x Data: x%x x%x x%x x%x\n",
-			 ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
-			 ulp_status, ulp_word4,
+			 "IoTag x%x refcnt %d nflags x%x xflags x%x "
+			 "Data: x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, iotag,
+			 kref_read(&ndlp->kref), ndlp->nlp_flag,
+			 ndlp->fc4_xpt_flags, ulp_status, ulp_word4,
 			 tmo, vport->num_disc_nodes);
 
 	if (lpfc_els_chk_latt(vport)) {
@@ -5075,16 +5085,19 @@ out_retry:
 	if (logerr) {
 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 			 "0137 No retry ELS command x%x to remote "
-			 "NPORT x%x: Out of Resources: Error:x%x/%x\n",
-			 cmd, did, ulp_status,
-			 ulp_word4);
+			 "NPORT x%x: Out of Resources: Error:x%x/%x "
+			 "IoTag x%x\n",
+			 cmd, did, ulp_status, ulp_word4,
+			 cmdiocb->iotag);
 	}
 	else {
 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
-			 "0108 No retry ELS command x%x to remote "
-			 "NPORT x%x Retried:%d Error:x%x/%x\n",
-			 cmd, did, cmdiocb->retry, ulp_status,
-			 ulp_word4);
+				 "0108 No retry ELS command x%x to remote "
+				 "NPORT x%x Retried:%d Error:x%x/%x "
+				 "IoTag x%x nflags x%x\n",
+				 cmd, did, cmdiocb->retry, ulp_status,
+				 ulp_word4, cmdiocb->iotag,
+				 (ndlp ? ndlp->nlp_flag : 0));
 	}
 	return 0;
 }