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lpfc: add support for translating an RSCN rcv into a discovery rescan

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This patch updates RSCN receive processing to check for the remote
port being an NVME port, and if so, invoke the nvme_fc callback to
rescan the remote port.  The rescan will generate a discovery udev
event.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
James Smart 2019-05-14 14:58:07 -07:00 committed by Christoph Hellwig
parent ab723121a8
commit 6f2589f478
3 changed files with 51 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/scsi/lpfc/lpfc_crtn.h
View File

@ -557,6 +557,8 @@ void lpfc_ras_stop_fwlog(struct lpfc_hba *phba);
int lpfc_check_fwlog_support(struct lpfc_hba *phba);
/* NVME interfaces. */
void lpfc_nvme_rescan_port(struct lpfc_vport *vport,
struct lpfc_nodelist *ndlp);
void lpfc_nvme_unregister_port(struct lpfc_vport *vport,
struct lpfc_nodelist *ndlp);
int lpfc_nvme_register_port(struct lpfc_vport *vport,

5
drivers/scsi/lpfc/lpfc_els.c
View File

@ -6326,6 +6326,8 @@ lpfc_rscn_recovery_check(struct lpfc_vport *vport)
continue;
}
if (ndlp->nlp_fc4_type & NLP_FC4_NVME)
lpfc_nvme_rescan_port(vport, ndlp);
lpfc_disc_state_machine(vport, ndlp, NULL,
NLP_EVT_DEVICE_RECOVERY);
@ -6437,6 +6439,9 @@ lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
"2024 pt2pt RSCN %08x Data: x%x x%x\n",
*lp, vport->fc_flag, payload_len);
lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
if (ndlp->nlp_fc4_type & NLP_FC4_NVME)
lpfc_nvme_rescan_port(vport, ndlp);
return 0;
}

44
drivers/scsi/lpfc/lpfc_nvme.c
View File

@ -2402,6 +2402,50 @@ lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
#endif
}
/**
* lpfc_nvme_rescan_port - Check to see if we should rescan this remoteport
*
* If the ndlp represents an NVME Target, that we are logged into,
* ping the NVME FC Transport layer to initiate a device rescan
* on this remote NPort.
*/
void
lpfc_nvme_rescan_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
#if (IS_ENABLED(CONFIG_NVME_FC))
struct lpfc_nvme_rport *rport;
struct nvme_fc_remote_port *remoteport;
rport = ndlp->nrport;
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
"6170 Rescan NPort DID x%06x type x%x "
"state x%x rport %p\n",
ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_state, rport);
if (!rport)
goto input_err;
remoteport = rport->remoteport;
if (!remoteport)
goto input_err;
/* Only rescan if we are an NVME target in the MAPPED state */
if (remoteport->port_role & FC_PORT_ROLE_NVME_DISCOVERY &&
ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
nvme_fc_rescan_remoteport(remoteport);
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6172 NVME rescanned DID x%06x "
"port_state x%x\n",
ndlp->nlp_DID, remoteport->port_state);
}
return;
input_err:
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
"6169 State error: lport %p, rport%p FCID x%06x\n",
vport->localport, ndlp->rport, ndlp->nlp_DID);
#endif
}
/* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
*
* There is no notion of Devloss or rport recovery from the current