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[SCSI] zfcp: make use of fc_remote_port_delete when target port is unavailable 

If zfcp's port erp fails we now call fc_remote_port_delete. This helps
to avoid offlined scsi devices if scsi commands time out due to path
failures. When an adapter erp fails we call fc_remote_port_delete for
all ports on that adapter.

Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Andreas Herrmann 2006-05-22 18:25:56 +02:00 committed by James Bottomley
parent 75bfc2837b
commit 338151e066
3 changed files with 27 additions and 4 deletions
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22
drivers/s390/scsi/zfcp_erp.c
View File

@ -3241,9 +3241,13 @@ zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
case ZFCP_ERP_ACTION_REOPEN_PORT:
if (atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN,
&port->status)) {
zfcp_port_put(port);
break;
}
if ((result == ZFCP_ERP_SUCCEEDED)
&& !atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN,
&port->status)
&& !port->rport) {
struct fc_rport_identifiers ids;
ids.node_name = port->wwnn;
@ -3264,9 +3268,23 @@ zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
port->supported_classes;
}
}
if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) {
fc_remote_port_delete(port->rport);
port->rport = NULL;
}
zfcp_port_put(port);
break;
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (result != ZFCP_ERP_SUCCEEDED) {
struct zfcp_port *port;
list_for_each_entry(port, &adapter->port_list_head, list)
if (port->rport &&
!atomic_test_mask(ZFCP_STATUS_PORT_WKA,
&port->status)) {
fc_remote_port_delete(port->rport);
port->rport = NULL;
}
}
zfcp_adapter_put(adapter);
break;
default:

2
drivers/s390/scsi/zfcp_ext.h
View File

@ -132,8 +132,6 @@ extern int zfcp_scsi_command_async(struct zfcp_adapter *,struct zfcp_unit *,
struct scsi_cmnd *, struct timer_list *);
extern int zfcp_scsi_command_sync(struct zfcp_unit *, struct scsi_cmnd *,
struct timer_list *);
extern void zfcp_set_fc_host_attrs(struct zfcp_adapter *);
extern void zfcp_set_fc_rport_attrs(struct zfcp_port *);
extern struct scsi_transport_template *zfcp_transport_template;
extern struct fc_function_template zfcp_transport_functions;

7
drivers/s390/scsi/zfcp_scsi.c
View File

@ -800,12 +800,18 @@ zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
}
}
static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
{
rport->dev_loss_tmo = timeout;
}
struct fc_function_template zfcp_transport_functions = {
.show_starget_port_id = 1,
.show_starget_port_name = 1,
.show_starget_node_name = 1,
.show_rport_supported_classes = 1,
.show_rport_maxframe_size = 1,
.show_rport_dev_loss_tmo = 1,
.show_host_node_name = 1,
.show_host_port_name = 1,
.show_host_permanent_port_name = 1,
@ -815,6 +821,7 @@ struct fc_function_template zfcp_transport_functions = {
.show_host_serial_number = 1,
.get_fc_host_stats = zfcp_get_fc_host_stats,
.reset_fc_host_stats = zfcp_reset_fc_host_stats,
.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
/* no functions registered for following dynamic attributes but
directly set by LLDD */
.show_host_port_type = 1,