/**
* 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);
}
