[PATCH 09/21] lpfc: Fix duplicate NVME rport entries and namespaces.

James Smart
2017-08-02T23:38:04Z

After lip, the driver sometimes would have two rports for the same
device, allowing the namespaces to be duplicated by nvme.

In lpfc_plogi_confirm_nport() the driver was not swapping the
nrport maintained by the ndlp's undergoing address swapping. This
allowed the 2nd rport to sneak in as it was considered a separate
device.

This patch adds the fixes to Swap the nrport in each ndlp and take
care of the reference counts on the ndlps similar to FCP rports.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
---
drivers/scsi/lpfc/lpfc_els.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 6962e22087c8..fe0dd42b75af 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -1527,6 +1527,7 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
uint8_t name[sizeof(struct lpfc_name)];
uint32_t rc, keepDID = 0, keep_nlp_flag = 0;
uint16_t keep_nlp_state;
+ struct lpfc_nvme_rport *keep_nrport = NULL;
int put_node;
int put_rport;
unsigned long *active_rrqs_xri_bitmap = NULL;
@@ -1624,6 +1625,10 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
keep_nlp_state = new_ndlp->nlp_state;
lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);

+ /* For nvme, swap the nrport. */
+ keep_nrport = new_ndlp->nrport;
+ new_ndlp->nrport = ndlp->nrport;
+
/* Move this back to NPR state */
if (memcmp(&ndlp->nlp_portname, name, sizeof(struct lpfc_name)) == 0) {
/* The new_ndlp is replacing ndlp totally, so we need
@@ -1646,6 +1651,13 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
}
new_ndlp->nlp_type = ndlp->nlp_type;
}
+
+ /* Fix up the nvme rport */
+ if (ndlp->nrport) {
+ ndlp->nrport = NULL;
+ lpfc_nlp_put(ndlp);
+ }
+
/* We shall actually free the ndlp with both nlp_DID and
* nlp_portname fields equals 0 to avoid any ndlp on the
* nodelist never to be used.
@@ -1690,6 +1702,14 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
keep_nlp_state = NLP_STE_NPR_NODE;
lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);

+ /* Previous ndlp no longer active with nvme host transport.
+ * Remove reference from earlier registration unless the
+ * nvme host took care of it.
+ */
+ if (ndlp->nrport)
+ lpfc_nlp_put(ndlp);
+ ndlp->nrport = keep_nrport;
+
/* Fix up the rport accordingly */
rport = ndlp->rport;
if (rport) {
--
2.13.1