[SCSI] zfcp: Use SCSI device data zfcp_scsi_dev instead of zfcp_unit
This is the large change to switch from using the data in
zfcp_unit to zfcp_scsi_dev. Keeping everything working requires doing
the switch in one piece. To ensure that no code keeps using the data
in zfcp_unit, this patch also removes the data from zfcp_unit that is
now being replaced with zfcp_scsi_dev.
For zfcp, the scsi_device together with zfcp_scsi_dev exist from the
call of slave_alloc to the call of slave_destroy. The data in
zfcp_scsi_dev is initialized in zfcp_scsi_slave_alloc and the LUN is
opened; the final shutdown for the LUN is run from slave_destroy.
Where the scsi_device or zfcp_scsi_dev is needed, the pointer to the
scsi_device is passed as function argument and inside the function
converted to the pointer to zfcp_scsi_dev; this avoids back and forth
conversion betweeen scsi_device and zfcp_scsi_dev.
While changing the function arguments from zfcp_unit to scsi_device,
the functions names are renamed form "unit" to "lun". This is to have
a seperation between zfcp_scsi_dev/LUN and the zfcp_unit; only code
referring to the remaining configuration information in zfcp_unit
struct uses "unit".
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@suse.de>
diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index a86117b..2224caa 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -482,7 +482,7 @@
zfcp_dbf_out(&p, "fcp_lun", "0x%016Lx", r->u.trigger.fcp_lun);
zfcp_dbf_out(&p, "adapter_status", "0x%08x", r->u.trigger.as);
zfcp_dbf_out(&p, "port_status", "0x%08x", r->u.trigger.ps);
- zfcp_dbf_out(&p, "unit_status", "0x%08x", r->u.trigger.us);
+ zfcp_dbf_out(&p, "lun_status", "0x%08x", r->u.trigger.ls);
break;
case ZFCP_REC_DBF_ID_ACTION:
zfcp_dbf_out(&p, "erp_action", "0x%016Lx", r->u.action.action);
@@ -600,19 +600,20 @@
}
/**
- * zfcp_dbf_rec_unit - trace event for unit state change
+ * zfcp_dbf_rec_lun - trace event for LUN state change
* @id: identifier for trigger of state change
* @ref: additional reference (e.g. request)
- * @unit: unit
+ * @sdev: SCSI device
*/
-void zfcp_dbf_rec_unit(char *id, void *ref, struct zfcp_unit *unit)
+void zfcp_dbf_rec_lun(char *id, void *ref, struct scsi_device *sdev)
{
- struct zfcp_port *port = unit->port;
+ struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
+ struct zfcp_port *port = zfcp_sdev->port;
struct zfcp_dbf *dbf = port->adapter->dbf;
- zfcp_dbf_rec_target(id, ref, dbf, &unit->status,
- &unit->erp_counter, port->wwpn, port->d_id,
- unit->fcp_lun);
+ zfcp_dbf_rec_target(id, ref, dbf, &zfcp_sdev->status,
+ &zfcp_sdev->erp_counter, port->wwpn, port->d_id,
+ zfcp_scsi_dev_lun(sdev));
}
/**
@@ -624,11 +625,11 @@
* @action: address of error recovery action struct
* @adapter: adapter
* @port: port
- * @unit: unit
+ * @sdev: SCSI device
*/
void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
struct zfcp_adapter *adapter, struct zfcp_port *port,
- struct zfcp_unit *unit)
+ struct scsi_device *sdev)
{
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
@@ -647,9 +648,10 @@
r->u.trigger.ps = atomic_read(&port->status);
r->u.trigger.wwpn = port->wwpn;
}
- if (unit)
- r->u.trigger.us = atomic_read(&unit->status);
- r->u.trigger.fcp_lun = unit ? unit->fcp_lun : ZFCP_DBF_INVALID_LUN;
+ if (sdev)
+ r->u.trigger.ls = atomic_read(&sdev_to_zfcp(sdev)->status);
+ r->u.trigger.fcp_lun = sdev ? zfcp_scsi_dev_lun(sdev) :
+ ZFCP_DBF_INVALID_LUN;
debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}