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[SCSI] zfcp: Fix erp escalation procedure

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If an action fails, retry it until the erp count exceeds the
threshold. If there is something fundamentally wrong, the FSF layer
will trigger a more appropriate action depending on the FSF status
codes.

The followup for successful actions is a different followup than
retrying failed actions, so split the code two functions to make this
clear.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Christof Schmitt 2009-07-13 15:06:09 +02:00 committed by James Bottomley
parent ddb3e0c111
commit 85600f7f83
1 changed files with 24 additions and 26 deletions
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50
drivers/s390/scsi/zfcp_erp.c
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@ -553,40 +553,35 @@ static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear,
_zfcp_erp_unit_reopen(unit, clear, id, ref);
}
static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act)
static void zfcp_erp_strategy_followup_failed(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);
_zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1", 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);
_zfcp_erp_port_forced_reopen(act->port, 0, "ersff_2", 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);
_zfcp_erp_port_reopen(act->port, 0, "ersff_3", NULL);
break;
case ZFCP_ERP_ACTION_REOPEN_UNIT:
if (status != ZFCP_ERP_SUCCEEDED)
_zfcp_erp_port_reopen(unit->port, 0, "ersfa_7", NULL);
_zfcp_erp_unit_reopen(act->unit, 0, "ersff_4", NULL);
break;
}
}
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;
}
}
@ -1289,7 +1284,10 @@ static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
retval = zfcp_erp_strategy_statechange(erp_action, retval);
if (retval == ZFCP_ERP_EXIT)
goto unlock;
zfcp_erp_strategy_followup_actions(erp_action);
if (retval == ZFCP_ERP_SUCCEEDED)
zfcp_erp_strategy_followup_success(erp_action);
if (retval == ZFCP_ERP_FAILED)
zfcp_erp_strategy_followup_failed(erp_action);
unlock:
write_unlock(&adapter->erp_lock);