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Commit a5b11dda authored by Christof Schmitt's avatar Christof Schmitt Committed by James Bottomley
Browse files

[SCSI] zfcp: Remove some port flags 



PORT_PHYS_CLOSING is only set and cleared, but not actually used
for status checking.

PORT_INVALID_WWPN is set when the GID_PN request does not return
a d_id for a remote port, e.g. when a remote port has been
unplugged. For this case, the d_id is zero. In the erp we can
check the d_id and use the normal escalation procedure that gives
up after three retries and remove the special case.

PORT_NO_WWPN is unused: Each port in the remote port list has a
valid wwpn. The WKA ports are now tracked outside the port
list. Remove the PORT_NO_WWPN flag, since this is no longer set
for any port.

Acked-by: default avatarSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: default avatarChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 77c01976

drivers/s390/scsi/zfcp_aux.c

+6 −7
Original line number Diff line number Diff line
@@ -249,8 +249,8 @@ struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, 
	struct zfcp_port *port;



	list_for_each_entry(port, &adapter->port_list_head, list)

		if ((port->wwpn == wwpn) && !(atomic_read(&port->status) &

		      (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE)))

		if ((port->wwpn == wwpn) &&

		    !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE))

			return port;

	return NULL;

}
@@ -620,7 +620,6 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn, 
	dev_set_drvdata(&port->sysfs_device, port);



	read_lock_irq(&zfcp_data.config_lock);

	if (!(status & ZFCP_STATUS_PORT_NO_WWPN))

	if (zfcp_get_port_by_wwpn(adapter, wwpn)) {

		read_unlock_irq(&zfcp_data.config_lock);

		goto err_out_free;

drivers/s390/scsi/zfcp_def.h

+0 −3
Original line number Diff line number Diff line
@@ -243,9 +243,6 @@ struct zfcp_ls_adisc { 


/* remote port status */

#define ZFCP_STATUS_PORT_PHYS_OPEN		0x00000001

#define ZFCP_STATUS_PORT_PHYS_CLOSING		0x00000004

#define ZFCP_STATUS_PORT_NO_WWPN		0x00000008

#define ZFCP_STATUS_PORT_INVALID_WWPN		0x00000020



/* well known address (WKA) port status*/

enum zfcp_wka_status {

drivers/s390/scsi/zfcp_erp.c

+2 −14
Original line number Diff line number Diff line
@@ -777,10 +777,7 @@ static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) 


static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)

{

	atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |

			  ZFCP_STATUS_PORT_PHYS_CLOSING |

			  ZFCP_STATUS_PORT_INVALID_WWPN,

			  &port->status);

	atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status);

}



static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
@@ -875,13 +872,8 @@ static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) 
			return ZFCP_ERP_CONTINUES;

		}

	case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:

		if (!port->d_id) {

			if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) {

				zfcp_erp_port_failed(port, 26, NULL);

				return ZFCP_ERP_EXIT;

			}

		if (!port->d_id)

			return ZFCP_ERP_FAILED;

		}

		return zfcp_erp_port_strategy_open_port(act);



	case ZFCP_ERP_STEP_PORT_OPENING:
@@ -1269,10 +1261,6 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) 


	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:

	case ZFCP_ERP_ACTION_REOPEN_PORT:

		if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) {

			zfcp_port_put(port);

			return;

		}

		if ((result == ZFCP_ERP_SUCCEEDED) && !port->rport)

			zfcp_erp_rport_register(port);

		if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) {

drivers/s390/scsi/zfcp_fc.c

+2 −3
Original line number Diff line number Diff line
@@ -259,10 +259,9 @@ static void zfcp_fc_ns_gid_pn_eval(unsigned long data) 


	if (ct->status)

		return;

	if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) {

		atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);

	if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT)

		return;

	}



	/* paranoia */

	if (ct_iu_req->wwpn != port->wwpn)

		return;

drivers/s390/scsi/zfcp_fsf.c

+1 −5
Original line number Diff line number Diff line
@@ -1712,7 +1712,7 @@ static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) 
	struct zfcp_unit *unit;



	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)

		goto skip_fsfstatus;

		return;



	switch (header->fsf_status) {

	case FSF_PORT_HANDLE_NOT_VALID:
@@ -1752,8 +1752,6 @@ static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) 
					  &unit->status);

		break;

	}

skip_fsfstatus:

	atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);

}



/**
@@ -1789,8 +1787,6 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 
	req->erp_action = erp_action;

	req->handler = zfcp_fsf_close_physical_port_handler;

	erp_action->fsf_req = req;

	atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,

			&erp_action->port->status);



	zfcp_fsf_start_erp_timer(req);

	retval = zfcp_fsf_req_send(req);