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scsi: lpfc: Handle duplicate D_IDs in ndlp search-by D_ID routine

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[ Upstream commit 56c3d809b7b450379162d0b8a70bbe71ab8db706 ]

After a port swap between separate fabrics, there may be multiple nodes in
the vport's fc_nodes list with the same fabric well known address.
Duplication is temporary and eventually resolves itself after dev_loss_tmo
expires, but nameserver queries may still occur before dev_loss_tmo.  This
possibly results in returning stale fabric ndlp objects.  Fix by adding an
nlp_state check to ensure the ndlp search routine returns the correct newer
allocated ndlp fabric object.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20250131000524.163662-5-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Justin Tee
2025-01-30 16:05:22 -08:00
committed by Greg Kroah-Hartman
parent c34ab75add
commit 3dfeee957a
1 changed files with 12 additions and 5 deletions
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17
drivers/scsi/lpfc/lpfc_hbadisc.c
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@@ -5646,6 +5646,7 @@ static struct lpfc_nodelist *
__lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
{
struct lpfc_nodelist *ndlp;
struct lpfc_nodelist *np = NULL;
uint32_t data1;
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
@@ -5660,14 +5661,20 @@ __lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
ndlp, ndlp->nlp_DID,
ndlp->nlp_flag, data1, ndlp->nlp_rpi,
ndlp->active_rrqs_xri_bitmap);
return ndlp;
/* Check for new or potentially stale node */
if (ndlp->nlp_state != NLP_STE_UNUSED_NODE)
return ndlp;
np = ndlp;
}
}
/* FIND node did <did> NOT FOUND */
lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
"0932 FIND node did x%x NOT FOUND.\n", did);
return NULL;
if (!np)
/* FIND node did <did> NOT FOUND */
lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
"0932 FIND node did x%x NOT FOUND.\n", did);
return np;
}
struct lpfc_nodelist *