/** * zfcp_erp_try_rport_unblock - unblock rport if no more/new recovery * @port: zfcp_port whose fc_rport we should try to unblock */ static void zfcp_erp_try_rport_unblock(struct zfcp_port *port) { unsigned long flags; struct zfcp_adapter *adapter = port->adapter; int port_status; struct Scsi_Host *shost = adapter->scsi_host; struct scsi_device *sdev; write_lock_irqsave(&adapter->erp_lock, flags); port_status = atomic_read(&port->status); if ((port_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || (port_status & (ZFCP_STATUS_COMMON_ERP_INUSE | ZFCP_STATUS_COMMON_ERP_FAILED)) != 0) { /* new ERP of severity >= port triggered elsewhere meanwhile or * local link down (adapter erp_failed but not clear unblock) */ zfcp_dbf_rec_run_lvl(4, "ertru_p", &port->erp_action); write_unlock_irqrestore(&adapter->erp_lock, flags); return; } spin_lock(shost->host_lock); __shost_for_each_device(sdev, shost) { struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev); int lun_status; if (zsdev->port != port) continue; /* LUN under port of interest */ lun_status = atomic_read(&zsdev->status); if ((lun_status & ZFCP_STATUS_COMMON_ERP_FAILED) != 0) continue; /* unblock rport despite failed LUNs */ /* LUN recovery not given up yet [maybe follow-up pending] */ if ((lun_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || (lun_status & ZFCP_STATUS_COMMON_ERP_INUSE) != 0) { /* LUN blocked: * not yet unblocked [LUN recovery pending] * or meanwhile blocked [new LUN recovery triggered] */ zfcp_dbf_rec_run_lvl(4, "ertru_l", &zsdev->erp_action); spin_unlock(shost->host_lock); write_unlock_irqrestore(&adapter->erp_lock, flags); return; } } /* now port has no child or all children have completed recovery, * and no ERP of severity >= port was meanwhile triggered elsewhere */ zfcp_scsi_schedule_rport_register(port); spin_unlock(shost->host_lock); write_unlock_irqrestore(&adapter->erp_lock, flags); }
/** * zfcp_dbf_rec_run - trace event related to running recovery * @tag: identifier for event * @erp: erp_action running */ void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp) { zfcp_dbf_rec_run_lvl(1, tag, erp); }