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scsi: lpfc: rport port swap discovery issue. 

Two initiator ports were cable swapped and after swap both went down.  The
driver internally swaps the nlp nodes based on matching node wwn's but not
the same nport id as before. After detecting a change in the nodes RPI, the
driver sends an UNREG_RPI command and clears the NLP_RPI_REGISTERED flag,
then swaps the node information with the other node. But the other node's
NLP_RPI_REGISTERED flag is also cleared, but it is done so without an
UNREG_RPI being sent, which causes the later REG_RPI for that other node to
fail as the hardware believes its still registered.

Additionally, if the node swap occurred while the two nodes had PLOGI's in
flight, the fc4_types weren't properly getting swapped such that when the
PLOGIs commpleted and PRLI's were then sent, the PRLI's acted on bad
protocol types so the PRLI was for the wrong protocol. NVME devices saw
SCSI FCP PRLIs and vice versa.

Clean up the node swap so that the NLP_RPI_REGISTERED flag is handled
properly.

Fix the handling of the fc4_types when the nodes are swapped as well

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2018-11-29 16:09:34 -08:00 committed by Martin K. Petersen
parent 8b47ae69e0
commit 92ea83a878
1 changed files with 36 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
drivers/scsi/lpfc/lpfc_els.c
View File

@ -1538,7 +1538,9 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
struct serv_parm *sp;
uint8_t name[sizeof(struct lpfc_name)];
uint32_t rc, keepDID = 0, keep_nlp_flag = 0;
uint32_t keep_new_nlp_flag = 0;
uint16_t keep_nlp_state;
u32 keep_nlp_fc4_type = 0;
struct lpfc_nvme_rport *keep_nrport = NULL;
int put_node;
int put_rport;
@ -1630,8 +1632,10 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
* would have updated nlp_fc4_type in ndlp, so we must ensure
* new_ndlp has the right value.
*/
if (vport->fc_flag & FC_FABRIC)
if (vport->fc_flag & FC_FABRIC) {
keep_nlp_fc4_type = new_ndlp->nlp_fc4_type;
new_ndlp->nlp_fc4_type = ndlp->nlp_fc4_type;
}
lpfc_unreg_rpi(vport, new_ndlp);
new_ndlp->nlp_DID = ndlp->nlp_DID;
@ -1642,20 +1646,35 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
phba->cfg_rrq_xri_bitmap_sz);
spin_lock_irq(shost->host_lock);
keep_nlp_flag = new_ndlp->nlp_flag;
keep_new_nlp_flag = new_ndlp->nlp_flag;
keep_nlp_flag = ndlp->nlp_flag;
new_ndlp->nlp_flag = ndlp->nlp_flag;
/* if new_ndlp had NLP_UNREG_INP set, keep it */
if (keep_nlp_flag & NLP_UNREG_INP)
if (keep_new_nlp_flag & NLP_UNREG_INP)
new_ndlp->nlp_flag |= NLP_UNREG_INP;
else
new_ndlp->nlp_flag &= ~NLP_UNREG_INP;
/* if ndlp had NLP_UNREG_INP set, keep it */
if (ndlp->nlp_flag & NLP_UNREG_INP)
ndlp->nlp_flag = keep_nlp_flag | NLP_UNREG_INP;
/* if new_ndlp had NLP_RPI_REGISTERED set, keep it */
if (keep_new_nlp_flag & NLP_RPI_REGISTERED)
new_ndlp->nlp_flag |= NLP_RPI_REGISTERED;
else
ndlp->nlp_flag = keep_nlp_flag & ~NLP_UNREG_INP;
new_ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
ndlp->nlp_flag = keep_new_nlp_flag;
/* if ndlp had NLP_UNREG_INP set, keep it */
if (keep_nlp_flag & NLP_UNREG_INP)
ndlp->nlp_flag |= NLP_UNREG_INP;
else
ndlp->nlp_flag &= ~NLP_UNREG_INP;
/* if ndlp had NLP_RPI_REGISTERED set, keep it */
if (keep_nlp_flag & NLP_RPI_REGISTERED)
ndlp->nlp_flag |= NLP_RPI_REGISTERED;
else
ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
spin_unlock_irq(shost->host_lock);
@ -1706,7 +1725,10 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
spin_unlock_irq(&phba->ndlp_lock);
}
/* Two ndlps cannot have the same did on the nodelist */
/* Two ndlps cannot have the same did on the nodelist.
* Note: for this case, ndlp has a NULL WWPN so setting
* the nlp_fc4_type isn't required.
*/
ndlp->nlp_DID = keepDID;
lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
if (phba->sli_rev == LPFC_SLI_REV4 &&
@ -1725,8 +1747,13 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
lpfc_unreg_rpi(vport, ndlp);
/* Two ndlps cannot have the same did */
/* Two ndlps cannot have the same did and the fc4
* type must be transferred because the ndlp is in
* flight.
*/
ndlp->nlp_DID = keepDID;
ndlp->nlp_fc4_type = keep_nlp_fc4_type;
if (phba->sli_rev == LPFC_SLI_REV4 &&
active_rrqs_xri_bitmap)
memcpy(ndlp->active_rrqs_xri_bitmap,