static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
int clear, char *id, void *ref)
{
struct zfcp_port *port;
list_for_each_entry(port, &adapter->port_list_head, list)
_zfcp_erp_port_reopen(port, clear, id, ref);
}
static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter)
{
struct zfcp_port *port;
port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
adapter->peer_d_id);
if (IS_ERR(port)) /* error or port already attached */
return;
_zfcp_erp_port_reopen(port, 0, "ereptp1", NULL);
}
static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter)
{
struct zfcp_port *port;
port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
adapter->peer_d_id);
if (IS_ERR(port))
return;
_zfcp_erp_port_reopen(port, 0, "ereptp1");
}
static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
int clear, char *id)
{
struct zfcp_port *port;
read_lock(&adapter->port_list_lock);
list_for_each_entry(port, &adapter->port_list, list)
_zfcp_erp_port_reopen(port, clear, id);
read_unlock(&adapter->port_list_lock);
}
int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id)
{
int retval;
unsigned long flags;
struct zfcp_adapter *adapter = port->adapter;
write_lock_irqsave(&adapter->erp_lock, flags);
retval = _zfcp_erp_port_reopen(port, clear, id);
write_unlock_irqrestore(&adapter->erp_lock, flags);
return retval;
}
static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act)
{
switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
_zfcp_erp_port_reopen_all(act->adapter, 0, "ersfs_1", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
_zfcp_erp_port_reopen(act->port, 0, "ersfs_2", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT:
_zfcp_erp_unit_reopen_all(act->port, 0, "ersfs_3", NULL);
break;
}
}
/**
* zfcp_erp_port_reopen - trigger remote port recovery
* @port: port to recover
* @clear_mask: flags in port status to be cleared
*
* Returns 0 if recovery has been triggered, < 0 if not.
*/
int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id, void *ref)
{
unsigned long flags;
int retval;
struct zfcp_adapter *adapter = port->adapter;
read_lock_irqsave(&zfcp_data.config_lock, flags);
write_lock(&adapter->erp_lock);
retval = _zfcp_erp_port_reopen(port, clear, id, ref);
write_unlock(&adapter->erp_lock);
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
return retval;
}
static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct zfcp_unit *unit = act->unit;
u32 status = act->status;
/* initiate follow-up actions depending on success of finished action */
switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (status == ZFCP_ERP_SUCCEEDED)
_zfcp_erp_port_reopen_all(adapter, 0, "ersfa_1", NULL);
else
_zfcp_erp_adapter_reopen(adapter, 0, "ersfa_2", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
if (status == ZFCP_ERP_SUCCEEDED)
_zfcp_erp_port_reopen(port, 0, "ersfa_3", NULL);
else
_zfcp_erp_adapter_reopen(adapter, 0, "ersfa_4", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT:
if (status == ZFCP_ERP_SUCCEEDED)
_zfcp_erp_unit_reopen_all(port, 0, "ersfa_5", NULL);
else
_zfcp_erp_port_forced_reopen(port, 0, "ersfa_6", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_UNIT:
if (status != ZFCP_ERP_SUCCEEDED)
_zfcp_erp_port_reopen(unit->port, 0, "ersfa_7", NULL);
break;
}
}
static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act)
{
switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
_zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
_zfcp_erp_port_forced_reopen(act->port, 0, "ersff_2", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT:
_zfcp_erp_port_reopen(act->port, 0, "ersff_3", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_UNIT:
_zfcp_erp_unit_reopen(act->unit, 0, "ersff_4", NULL);
break;
}
}
static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
{
int action = act->action;
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct scsi_device *sdev = act->sdev;
struct zfcp_scsi_dev *zfcp_sdev;
u32 erp_status = act->status;
switch (action) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) {
_zfcp_erp_adapter_reopen(adapter,
ZFCP_STATUS_COMMON_ERP_FAILED,
"ersscg1");
return ZFCP_ERP_EXIT;
}
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
case ZFCP_ERP_ACTION_REOPEN_PORT:
if (zfcp_erp_strat_change_det(&port->status, erp_status)) {
_zfcp_erp_port_reopen(port,
ZFCP_STATUS_COMMON_ERP_FAILED,
"ersscg2");
return ZFCP_ERP_EXIT;
}
break;
case ZFCP_ERP_ACTION_REOPEN_LUN:
zfcp_sdev = sdev_to_zfcp(sdev);
if (zfcp_erp_strat_change_det(&zfcp_sdev->status, erp_status)) {
_zfcp_erp_lun_reopen(sdev,
ZFCP_STATUS_COMMON_ERP_FAILED,
"ersscg3", 0);
return ZFCP_ERP_EXIT;
}
break;
}
return ret;
}
static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
int p_status = atomic_read(&port->status);
switch (act->step) {
case ZFCP_ERP_STEP_UNINITIALIZED:
case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
case ZFCP_ERP_STEP_PORT_CLOSING:
if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
return zfcp_erp_open_ptp_port(act);
if (!port->d_id) {
zfcp_port_get(port);
if (!queue_work(adapter->work_queue,
&port->gid_pn_work))
zfcp_port_put(port);
return ZFCP_ERP_EXIT;
}
return zfcp_erp_port_strategy_open_port(act);
case ZFCP_ERP_STEP_PORT_OPENING:
/* D_ID might have changed during open */
if (p_status & ZFCP_STATUS_COMMON_OPEN) {
if (port->d_id)
return ZFCP_ERP_SUCCEEDED;
else {
act->step = ZFCP_ERP_STEP_PORT_CLOSING;
return ZFCP_ERP_CONTINUES;
}
}
if (port->d_id && !(p_status & ZFCP_STATUS_COMMON_NOESC)) {
port->d_id = 0;
_zfcp_erp_port_reopen(port, 0, "erpsoc1", NULL);
return ZFCP_ERP_EXIT;
}
/* fall through otherwise */
}
return ZFCP_ERP_FAILED;
}
static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
{
int action = act->action;
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct zfcp_unit *unit = act->unit;
u32 erp_status = act->status;
switch (action) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) {
_zfcp_erp_adapter_reopen(adapter,
ZFCP_STATUS_COMMON_ERP_FAILED,
"ersscg1", NULL);
return ZFCP_ERP_EXIT;
}
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
case ZFCP_ERP_ACTION_REOPEN_PORT:
if (zfcp_erp_strat_change_det(&port->status, erp_status)) {
_zfcp_erp_port_reopen(port,
ZFCP_STATUS_COMMON_ERP_FAILED,
"ersscg2", NULL);
return ZFCP_ERP_EXIT;
}
break;
case ZFCP_ERP_ACTION_REOPEN_UNIT:
if (zfcp_erp_strat_change_det(&unit->status, erp_status)) {
_zfcp_erp_unit_reopen(unit,
ZFCP_STATUS_COMMON_ERP_FAILED,
"ersscg3", NULL);
return ZFCP_ERP_EXIT;
}
break;
}
return ret;
}
