drivers/s390/scsi/zfcp_sysfs.c - kernel/msm-4.9 - Gitiles

 /*
  * zfcp device driver
  *
  * sysfs attributes.
  *
  * Copyright IBM Corporation 2008, 2010
  */

 #define KMSG_COMPONENT "zfcp"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

 #include <linux/slab.h>
 #include "zfcp_ext.h"

 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
 							    _show, _store)
 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)	       \
 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,	       \
 						   struct device_attribute *at,\
 						   char *buf)		       \
 {									       \
 	struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
 									       \
 	return sprintf(buf, _format, _value);				       \
 }									       \
 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,				       \
 		     zfcp_sysfs_##_feat##_##_name##_show, NULL);

 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)			     \
 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,	     \
 						 struct device_attribute *at,\
 						 char *buf)		     \
 {									     \
 	struct ccw_device *cdev = to_ccwdev(dev);			     \
 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);	     \
 	int i;								     \
 									     \
 	if (!adapter)							     \
 		return -ENODEV;						     \
 									     \
 	i = sprintf(buf, _format, _value);				     \
 	zfcp_ccw_adapter_put(adapter);					     \
 	return i;							     \
 }									     \
 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,				     \
 		     zfcp_sysfs_adapter_##_name##_show, NULL);

 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
 		   (unsigned long long) adapter->peer_wwnn);
 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
 		   (unsigned long long) adapter->peer_wwpn);
 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
 					 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);

 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
 		 atomic_read(&port->status));
 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
 		 (atomic_read(&port->status) &
 		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
 		 (atomic_read(&port->status) &
 		  ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);

 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
 		 atomic_read(&unit->status));
 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
 		 (atomic_read(&unit->status) &
 		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
 		 (atomic_read(&unit->status) &
 		  ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
 		 (atomic_read(&unit->status) &
 		  ZFCP_STATUS_UNIT_SHARED) != 0);
 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
 		 (atomic_read(&unit->status) &
 		  ZFCP_STATUS_UNIT_READONLY) != 0);

 #define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id)     \
 static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev,	       \
 						struct device_attribute *attr, \
 						char *buf)		       \
 {									       \
 	struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
 									       \
 	if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED)       \
 		return sprintf(buf, "1\n");				       \
 	else								       \
 		return sprintf(buf, "0\n");				       \
 }									       \
 static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev,	       \
 						 struct device_attribute *attr,\
 						 const char *buf, size_t count)\
 {									       \
 	struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
 	unsigned long val;						       \
 	int retval = 0;							       \
 									       \
 	if (!(_feat && get_device(&_feat->dev)))			       \
 		return -EBUSY;						       \
 									       \
 	if (strict_strtoul(buf, 0, &val) || val != 0) {			       \
 		retval = -EINVAL;					       \
 		goto out;						       \
 	}								       \
 									       \
 	zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL,		       \
 					 ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
 	zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED,	       \
 				  _reopen_id, NULL);			       \
 	zfcp_erp_wait(_adapter);					       \
 out:									       \
 	put_device(&_feat->dev);					       \
 	return retval ? retval : (ssize_t) count;			       \
 }									       \
 static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO,			       \
 		     zfcp_sysfs_##_feat##_failed_show,			       \
 		     zfcp_sysfs_##_feat##_failed_store);

 ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
 ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");

 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 					      struct device_attribute *attr,
 					      char *buf)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 	int i;

 	if (!adapter)
 		return -ENODEV;

 	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 		i = sprintf(buf, "1\n");
 	else
 		i = sprintf(buf, "0\n");

 	zfcp_ccw_adapter_put(adapter);
 	return i;
 }

 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 					       struct device_attribute *attr,
 					       const char *buf, size_t count)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 	unsigned long val;
 	int retval = 0;

 	if (!adapter)
 		return -ENODEV;

 	if (strict_strtoul(buf, 0, &val) || val != 0) {
 		retval = -EINVAL;
 		goto out;
 	}

 	zfcp_erp_modify_adapter_status(adapter, "syafai1", NULL,
 				       ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
 	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
 				"syafai2", NULL);
 	zfcp_erp_wait(adapter);
 out:
 	zfcp_ccw_adapter_put(adapter);
 	return retval ? retval : (ssize_t) count;
 }
 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 		     zfcp_sysfs_adapter_failed_show,
 		     zfcp_sysfs_adapter_failed_store);

 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 					    struct device_attribute *attr,
 					    const char *buf, size_t count)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);

 	if (!adapter)
 		return -ENODEV;

 	/* sync the user-space- with the kernel-invocation of scan_work */
 	queue_work(adapter->work_queue, &adapter->scan_work);
 	flush_work(&adapter->scan_work);
 	zfcp_ccw_adapter_put(adapter);

 	return (ssize_t) count;
 }
 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 		     zfcp_sysfs_port_rescan_store);

 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 					    struct device_attribute *attr,
 					    const char *buf, size_t count)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 	struct zfcp_port *port;
 	u64 wwpn;
 	int retval = -EINVAL;

 	if (!adapter)
 		return -ENODEV;

 	if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
 		goto out;

 	port = zfcp_get_port_by_wwpn(adapter, wwpn);
 	if (!port)
 		goto out;
 	else
 		retval = 0;

 	write_lock_irq(&adapter->port_list_lock);
 	list_del(&port->list);
 	write_unlock_irq(&adapter->port_list_lock);

 	put_device(&port->dev);

 	zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
 	zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs);
  out:
 	zfcp_ccw_adapter_put(adapter);
 	return retval ? retval : (ssize_t) count;
 }
 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 		     zfcp_sysfs_port_remove_store);

 static struct attribute *zfcp_adapter_attrs[] = {
 	&dev_attr_adapter_failed.attr,
 	&dev_attr_adapter_in_recovery.attr,
 	&dev_attr_adapter_port_remove.attr,
 	&dev_attr_adapter_port_rescan.attr,
 	&dev_attr_adapter_peer_wwnn.attr,
 	&dev_attr_adapter_peer_wwpn.attr,
 	&dev_attr_adapter_peer_d_id.attr,
 	&dev_attr_adapter_card_version.attr,
 	&dev_attr_adapter_lic_version.attr,
 	&dev_attr_adapter_status.attr,
 	&dev_attr_adapter_hardware_version.attr,
 	NULL
 };

 struct attribute_group zfcp_sysfs_adapter_attrs = {
 	.attrs = zfcp_adapter_attrs,
 };

 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 					 struct device_attribute *attr,
 					 const char *buf, size_t count)
 {
 	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 	struct zfcp_unit *unit;
 	u64 fcp_lun;
 	int retval = -EINVAL;

 	if (!(port && get_device(&port->dev)))
 		return -EBUSY;

 	if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 		goto out;

 	unit = zfcp_unit_enqueue(port, fcp_lun);
 	if (IS_ERR(unit))
 		goto out;
 	else
 		retval = 0;

 	zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
 	zfcp_erp_wait(unit->port->adapter);
 	zfcp_scsi_scan(unit);
 out:
 	put_device(&port->dev);
 	return retval ? retval : (ssize_t) count;
 }
 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);

 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 					    struct device_attribute *attr,
 					    const char *buf, size_t count)
 {
 	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 	struct zfcp_unit *unit;
 	u64 fcp_lun;
 	int retval = -EINVAL;
 	struct scsi_device *sdev;

 	if (!(port && get_device(&port->dev)))
 		return -EBUSY;

 	if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 		goto out;

 	unit = zfcp_get_unit_by_lun(port, fcp_lun);
 	if (!unit)
 		goto out;
 	else
 		retval = 0;

 	sdev = scsi_device_lookup(port->adapter->scsi_host, 0,
 				  port->starget_id,
 				  scsilun_to_int((struct scsi_lun *)&fcp_lun));
 	if (sdev) {
 		scsi_remove_device(sdev);
 		scsi_device_put(sdev);
 	}

 	write_lock_irq(&port->unit_list_lock);
 	list_del(&unit->list);
 	write_unlock_irq(&port->unit_list_lock);

 	put_device(&unit->dev);

 	zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
 	zfcp_device_unregister(&unit->dev, &zfcp_sysfs_unit_attrs);
 out:
 	put_device(&port->dev);
 	return retval ? retval : (ssize_t) count;
 }
 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);

 static struct attribute *zfcp_port_attrs[] = {
 	&dev_attr_unit_add.attr,
 	&dev_attr_unit_remove.attr,
 	&dev_attr_port_failed.attr,
 	&dev_attr_port_in_recovery.attr,
 	&dev_attr_port_status.attr,
 	&dev_attr_port_access_denied.attr,
 	NULL
 };

 /**
  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
  */
 struct attribute_group zfcp_sysfs_port_attrs = {
 	.attrs = zfcp_port_attrs,
 };

 static struct attribute *zfcp_unit_attrs[] = {
 	&dev_attr_unit_failed.attr,
 	&dev_attr_unit_in_recovery.attr,
 	&dev_attr_unit_status.attr,
 	&dev_attr_unit_access_denied.attr,
 	&dev_attr_unit_access_shared.attr,
 	&dev_attr_unit_access_readonly.attr,
 	NULL
 };

 struct attribute_group zfcp_sysfs_unit_attrs = {
 	.attrs = zfcp_unit_attrs,
 };

 #define ZFCP_DEFINE_LATENCY_ATTR(_name) 				\
 static ssize_t								\
 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,		\
 				       struct device_attribute *attr,	\
 				       char *buf) {			\
 	struct scsi_device *sdev = to_scsi_device(dev);			\
 	struct zfcp_unit *unit = sdev->hostdata;			\
 	struct zfcp_latencies *lat = &unit->latencies;			\
 	struct zfcp_adapter *adapter = unit->port->adapter;		\
 	unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;	\
 									\
 	spin_lock_bh(&lat->lock);					\
 	fsum = lat->_name.fabric.sum * adapter->timer_ticks;		\
 	fmin = lat->_name.fabric.min * adapter->timer_ticks;		\
 	fmax = lat->_name.fabric.max * adapter->timer_ticks;		\
 	csum = lat->_name.channel.sum * adapter->timer_ticks;		\
 	cmin = lat->_name.channel.min * adapter->timer_ticks;		\
 	cmax = lat->_name.channel.max * adapter->timer_ticks;		\
 	cc  = lat->_name.counter;					\
 	spin_unlock_bh(&lat->lock);					\
 									\
 	do_div(fsum, 1000);						\
 	do_div(fmin, 1000);						\
 	do_div(fmax, 1000);						\
 	do_div(csum, 1000);						\
 	do_div(cmin, 1000);						\
 	do_div(cmax, 1000);						\
 									\
 	return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",	\
 		       fmin, fmax, fsum, cmin, cmax, csum, cc); 	\
 }									\
 static ssize_t								\
 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,		\
 					struct device_attribute *attr,	\
 					const char *buf, size_t count)	\
 {									\
 	struct scsi_device *sdev = to_scsi_device(dev);			\
 	struct zfcp_unit *unit = sdev->hostdata;			\
 	struct zfcp_latencies *lat = &unit->latencies;			\
 	unsigned long flags;						\
 									\
 	spin_lock_irqsave(&lat->lock, flags);				\
 	lat->_name.fabric.sum = 0;					\
 	lat->_name.fabric.min = 0xFFFFFFFF;				\
 	lat->_name.fabric.max = 0;					\
 	lat->_name.channel.sum = 0;					\
 	lat->_name.channel.min = 0xFFFFFFFF;				\
 	lat->_name.channel.max = 0;					\
 	lat->_name.counter = 0;						\
 	spin_unlock_irqrestore(&lat->lock, flags);			\
 									\
 	return (ssize_t) count;						\
 }									\
 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,			\
 		   zfcp_sysfs_unit_##_name##_latency_show,		\
 		   zfcp_sysfs_unit_##_name##_latency_store);

 ZFCP_DEFINE_LATENCY_ATTR(read);
 ZFCP_DEFINE_LATENCY_ATTR(write);
 ZFCP_DEFINE_LATENCY_ATTR(cmd);

 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)			\
 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,	\
 					      struct device_attribute *attr,\
 					      char *buf)                 \
 {                                                                        \
 	struct scsi_device *sdev  = to_scsi_device(dev);		 \
 	struct zfcp_unit *unit = sdev->hostdata;			 \
 									 \
 	return sprintf(buf, _format, _value);                            \
 }                                                                        \
 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);

 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 		      dev_name(&unit->port->adapter->ccw_device->dev));
 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 		      (unsigned long long) unit->port->wwpn);
 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
 		      (unsigned long long) unit->fcp_lun);

 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 	&dev_attr_fcp_lun,
 	&dev_attr_wwpn,
 	&dev_attr_hba_id,
 	&dev_attr_read_latency,
 	&dev_attr_write_latency,
 	&dev_attr_cmd_latency,
 	NULL
 };

 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 					    struct device_attribute *attr,
 					    char *buf)
 {
 	struct Scsi_Host *scsi_host = dev_to_shost(dev);
 	struct fsf_qtcb_bottom_port *qtcb_port;
 	struct zfcp_adapter *adapter;
 	int retval;

 	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 		return -EOPNOTSUPP;

 	qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 	if (!qtcb_port)
 		return -ENOMEM;

 	retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 	if (!retval)
 		retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 				 qtcb_port->cb_util, qtcb_port->a_util);
 	kfree(qtcb_port);
 	return retval;
 }
 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);

 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 					struct fsf_statistics_info *stat_inf)
 {
 	struct Scsi_Host *scsi_host = dev_to_shost(dev);
 	struct fsf_qtcb_bottom_config *qtcb_config;
 	struct zfcp_adapter *adapter;
 	int retval;

 	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 		return -EOPNOTSUPP;

 	qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 			      GFP_KERNEL);
 	if (!qtcb_config)
 		return -ENOMEM;

 	retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 	if (!retval)
 		*stat_inf = qtcb_config->stat_info;

 	kfree(qtcb_config);
 	return retval;
 }

 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)			\
 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,	\
 						 struct device_attribute *attr,\
 						 char *buf)		\
 {									\
 	struct fsf_statistics_info stat_info;				\
 	int retval;							\
 									\
 	retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);		\
 	if (retval)							\
 		return retval;						\
 									\
 	return sprintf(buf, _format, ## _arg);				\
 }									\
 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);

 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 		(unsigned long long) stat_info.input_req,
 		(unsigned long long) stat_info.output_req,
 		(unsigned long long) stat_info.control_req);

 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 		(unsigned long long) stat_info.input_mb,
 		(unsigned long long) stat_info.output_mb);

 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 		(unsigned long long) stat_info.seconds_act);

 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 					      struct device_attribute *attr,
 					      char *buf)
 {
 	struct Scsi_Host *scsi_host = class_to_shost(dev);
 	struct zfcp_qdio *qdio =
 		((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 	u64 util;

 	spin_lock_bh(&qdio->stat_lock);
 	util = qdio->req_q_util;
 	spin_unlock_bh(&qdio->stat_lock);

 	return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 		       (unsigned long long)util);
 }
 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);

 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 	&dev_attr_utilization,
 	&dev_attr_requests,
 	&dev_attr_megabytes,
 	&dev_attr_seconds_active,
 	&dev_attr_queue_full,
 	NULL
 };
	/*
	* zfcp device driver
	*
	* sysfs attributes.
	*
	* Copyright IBM Corporation 2008, 2010
	*/

	#define KMSG_COMPONENT "zfcp"
	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

	#include <linux/slab.h>
	#include "zfcp_ext.h"

	#define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
	struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
	_show, _store)
	#define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \
	static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
	struct device_attribute *at,\
	char *buf) \
	{ \
	struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
	\
	return sprintf(buf, _format, _value); \
	} \
	static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
	zfcp_sysfs_##_feat##_##_name##_show, NULL);

	#define ZFCP_DEFINE_A_ATTR(_name, _format, _value) \
	static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
	struct device_attribute *at,\
	char *buf) \
	{ \
	struct ccw_device *cdev = to_ccwdev(dev); \
	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev); \
	int i; \
	\
	if (!adapter) \
	return -ENODEV; \
	\
	i = sprintf(buf, _format, _value); \
	zfcp_ccw_adapter_put(adapter); \
	return i; \
	} \
	static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO, \
	zfcp_sysfs_adapter_##_name##_show, NULL);

	ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
	ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
	(unsigned long long) adapter->peer_wwnn);
	ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
	(unsigned long long) adapter->peer_wwpn);
	ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
	ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
	ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
	ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
	ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
	ZFCP_STATUS_COMMON_ERP_INUSE) != 0);

	ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
	atomic_read(&port->status));
	ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
	(atomic_read(&port->status) &
	ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
	ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
	(atomic_read(&port->status) &
	ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);

	ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
	atomic_read(&unit->status));
	ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
	(atomic_read(&unit->status) &
	ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
	ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
	(atomic_read(&unit->status) &
	ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
	ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
	(atomic_read(&unit->status) &
	ZFCP_STATUS_UNIT_SHARED) != 0);
	ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
	(atomic_read(&unit->status) &
	ZFCP_STATUS_UNIT_READONLY) != 0);

	#define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id) \
	static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev, \
	struct device_attribute *attr, \
	char *buf) \
	{ \
	struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
	\
	if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED) \
	return sprintf(buf, "1\n"); \
	else \
	return sprintf(buf, "0\n"); \
	} \
	static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \
	struct device_attribute *attr,\
	const char *buf, size_t count)\
	{ \
	struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
	unsigned long val; \
	int retval = 0; \
	\
	if (!(_feat && get_device(&_feat->dev))) \
	return -EBUSY; \
	\
	if (strict_strtoul(buf, 0, &val) \|\| val != 0) { \
	retval = -EINVAL; \
	goto out; \
	} \
	\
	zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL, \
	ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
	zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED, \
	_reopen_id, NULL); \
	zfcp_erp_wait(_adapter); \
	out: \
	put_device(&_feat->dev); \
	return retval ? retval : (ssize_t) count; \
	} \
	static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR \| S_IRUGO, \
	zfcp_sysfs_##_feat##_failed_show, \
	zfcp_sysfs_##_feat##_failed_store);

	ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
	ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");

	static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct ccw_device *cdev = to_ccwdev(dev);
	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
	int i;

	if (!adapter)
	return -ENODEV;

	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
	i = sprintf(buf, "1\n");
	else
	i = sprintf(buf, "0\n");

	zfcp_ccw_adapter_put(adapter);
	return i;
	}

	static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct ccw_device *cdev = to_ccwdev(dev);
	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
	unsigned long val;
	int retval = 0;

	if (!adapter)
	return -ENODEV;

	if (strict_strtoul(buf, 0, &val) \|\| val != 0) {
	retval = -EINVAL;
	goto out;
	}

	zfcp_erp_modify_adapter_status(adapter, "syafai1", NULL,
	ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
	"syafai2", NULL);
	zfcp_erp_wait(adapter);
	out:
	zfcp_ccw_adapter_put(adapter);
	return retval ? retval : (ssize_t) count;
	}
	static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR \| S_IRUGO,
	zfcp_sysfs_adapter_failed_show,
	zfcp_sysfs_adapter_failed_store);

	static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct ccw_device *cdev = to_ccwdev(dev);
	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);

	if (!adapter)
	return -ENODEV;

	/* sync the user-space- with the kernel-invocation of scan_work */
	queue_work(adapter->work_queue, &adapter->scan_work);
	flush_work(&adapter->scan_work);
	zfcp_ccw_adapter_put(adapter);

	return (ssize_t) count;
	}
	static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
	zfcp_sysfs_port_rescan_store);

	static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct ccw_device *cdev = to_ccwdev(dev);
	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
	struct zfcp_port *port;
	u64 wwpn;
	int retval = -EINVAL;

	if (!adapter)
	return -ENODEV;

	if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
	goto out;

	port = zfcp_get_port_by_wwpn(adapter, wwpn);
	if (!port)
	goto out;
	else
	retval = 0;

	write_lock_irq(&adapter->port_list_lock);
	list_del(&port->list);
	write_unlock_irq(&adapter->port_list_lock);

	put_device(&port->dev);

	zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
	zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs);
	out:
	zfcp_ccw_adapter_put(adapter);
	return retval ? retval : (ssize_t) count;
	}
	static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
	zfcp_sysfs_port_remove_store);

	static struct attribute *zfcp_adapter_attrs[] = {
	&dev_attr_adapter_failed.attr,
	&dev_attr_adapter_in_recovery.attr,
	&dev_attr_adapter_port_remove.attr,
	&dev_attr_adapter_port_rescan.attr,
	&dev_attr_adapter_peer_wwnn.attr,
	&dev_attr_adapter_peer_wwpn.attr,
	&dev_attr_adapter_peer_d_id.attr,
	&dev_attr_adapter_card_version.attr,
	&dev_attr_adapter_lic_version.attr,
	&dev_attr_adapter_status.attr,
	&dev_attr_adapter_hardware_version.attr,
	NULL
	};

	struct attribute_group zfcp_sysfs_adapter_attrs = {
	.attrs = zfcp_adapter_attrs,
	};

	static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
	struct zfcp_unit *unit;
	u64 fcp_lun;
	int retval = -EINVAL;

	if (!(port && get_device(&port->dev)))
	return -EBUSY;

	if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
	goto out;

	unit = zfcp_unit_enqueue(port, fcp_lun);
	if (IS_ERR(unit))
	goto out;
	else
	retval = 0;

	zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
	zfcp_erp_wait(unit->port->adapter);
	zfcp_scsi_scan(unit);
	out:
	put_device(&port->dev);
	return retval ? retval : (ssize_t) count;
	}
	static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);

	static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
	struct zfcp_unit *unit;
	u64 fcp_lun;
	int retval = -EINVAL;
	struct scsi_device *sdev;

	if (!(port && get_device(&port->dev)))
	return -EBUSY;

	if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
	goto out;

	unit = zfcp_get_unit_by_lun(port, fcp_lun);
	if (!unit)
	goto out;
	else
	retval = 0;

	sdev = scsi_device_lookup(port->adapter->scsi_host, 0,
	port->starget_id,
	scsilun_to_int((struct scsi_lun *)&fcp_lun));
	if (sdev) {
	scsi_remove_device(sdev);
	scsi_device_put(sdev);
	}

	write_lock_irq(&port->unit_list_lock);
	list_del(&unit->list);
	write_unlock_irq(&port->unit_list_lock);

	put_device(&unit->dev);

	zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
	zfcp_device_unregister(&unit->dev, &zfcp_sysfs_unit_attrs);
	out:
	put_device(&port->dev);
	return retval ? retval : (ssize_t) count;
	}
	static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);

	static struct attribute *zfcp_port_attrs[] = {
	&dev_attr_unit_add.attr,
	&dev_attr_unit_remove.attr,
	&dev_attr_port_failed.attr,
	&dev_attr_port_in_recovery.attr,
	&dev_attr_port_status.attr,
	&dev_attr_port_access_denied.attr,
	NULL
	};

	/**
	* zfcp_sysfs_port_attrs - sysfs attributes for all other ports
	*/
	struct attribute_group zfcp_sysfs_port_attrs = {
	.attrs = zfcp_port_attrs,
	};

	static struct attribute *zfcp_unit_attrs[] = {
	&dev_attr_unit_failed.attr,
	&dev_attr_unit_in_recovery.attr,
	&dev_attr_unit_status.attr,
	&dev_attr_unit_access_denied.attr,
	&dev_attr_unit_access_shared.attr,
	&dev_attr_unit_access_readonly.attr,
	NULL
	};

	struct attribute_group zfcp_sysfs_unit_attrs = {
	.attrs = zfcp_unit_attrs,
	};

	#define ZFCP_DEFINE_LATENCY_ATTR(_name) \
	static ssize_t \
	zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
	struct device_attribute *attr, \
	char *buf) { \
	struct scsi_device *sdev = to_scsi_device(dev); \
	struct zfcp_unit *unit = sdev->hostdata; \
	struct zfcp_latencies *lat = &unit->latencies; \
	struct zfcp_adapter *adapter = unit->port->adapter; \
	unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
	\
	spin_lock_bh(&lat->lock); \
	fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
	fmin = lat->_name.fabric.min * adapter->timer_ticks; \
	fmax = lat->_name.fabric.max * adapter->timer_ticks; \
	csum = lat->_name.channel.sum * adapter->timer_ticks; \
	cmin = lat->_name.channel.min * adapter->timer_ticks; \
	cmax = lat->_name.channel.max * adapter->timer_ticks; \
	cc = lat->_name.counter; \
	spin_unlock_bh(&lat->lock); \
	\
	do_div(fsum, 1000); \
	do_div(fmin, 1000); \
	do_div(fmax, 1000); \
	do_div(csum, 1000); \
	do_div(cmin, 1000); \
	do_div(cmax, 1000); \
	\
	return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
	fmin, fmax, fsum, cmin, cmax, csum, cc); \
	} \
	static ssize_t \
	zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
	struct device_attribute *attr, \
	const char *buf, size_t count) \
	{ \
	struct scsi_device *sdev = to_scsi_device(dev); \
	struct zfcp_unit *unit = sdev->hostdata; \
	struct zfcp_latencies *lat = &unit->latencies; \
	unsigned long flags; \
	\
	spin_lock_irqsave(&lat->lock, flags); \
	lat->_name.fabric.sum = 0; \
	lat->_name.fabric.min = 0xFFFFFFFF; \
	lat->_name.fabric.max = 0; \
	lat->_name.channel.sum = 0; \
	lat->_name.channel.min = 0xFFFFFFFF; \
	lat->_name.channel.max = 0; \
	lat->_name.counter = 0; \
	spin_unlock_irqrestore(&lat->lock, flags); \
	\
	return (ssize_t) count; \
	} \
	static DEVICE_ATTR(_name##_latency, S_IWUSR \| S_IRUGO, \
	zfcp_sysfs_unit_##_name##_latency_show, \
	zfcp_sysfs_unit_##_name##_latency_store);

	ZFCP_DEFINE_LATENCY_ATTR(read);
	ZFCP_DEFINE_LATENCY_ATTR(write);
	ZFCP_DEFINE_LATENCY_ATTR(cmd);

	#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
	static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \
	struct device_attribute *attr,\
	char *buf) \
	{ \
	struct scsi_device *sdev = to_scsi_device(dev); \
	struct zfcp_unit *unit = sdev->hostdata; \
	\
	return sprintf(buf, _format, _value); \
	} \
	static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);

	ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
	dev_name(&unit->port->adapter->ccw_device->dev));
	ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
	(unsigned long long) unit->port->wwpn);
	ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
	(unsigned long long) unit->fcp_lun);

	struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
	&dev_attr_fcp_lun,
	&dev_attr_wwpn,
	&dev_attr_hba_id,
	&dev_attr_read_latency,
	&dev_attr_write_latency,
	&dev_attr_cmd_latency,
	NULL
	};

	static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct Scsi_Host *scsi_host = dev_to_shost(dev);
	struct fsf_qtcb_bottom_port *qtcb_port;
	struct zfcp_adapter *adapter;
	int retval;

	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
	return -EOPNOTSUPP;

	qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
	if (!qtcb_port)
	return -ENOMEM;

	retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
	if (!retval)
	retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
	qtcb_port->cb_util, qtcb_port->a_util);
	kfree(qtcb_port);
	return retval;
	}
	static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);

	static int zfcp_sysfs_adapter_ex_config(struct device *dev,
	struct fsf_statistics_info *stat_inf)
	{
	struct Scsi_Host *scsi_host = dev_to_shost(dev);
	struct fsf_qtcb_bottom_config *qtcb_config;
	struct zfcp_adapter *adapter;
	int retval;

	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
	return -EOPNOTSUPP;

	qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
	GFP_KERNEL);
	if (!qtcb_config)
	return -ENOMEM;

	retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
	if (!retval)
	*stat_inf = qtcb_config->stat_info;

	kfree(qtcb_config);
	return retval;
	}

	#define ZFCP_SHOST_ATTR(_name, _format, _arg...) \
	static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
	struct device_attribute *attr,\
	char *buf) \
	{ \
	struct fsf_statistics_info stat_info; \
	int retval; \
	\
	retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \
	if (retval) \
	return retval; \
	\
	return sprintf(buf, _format, ## _arg); \
	} \
	static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);

	ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
	(unsigned long long) stat_info.input_req,
	(unsigned long long) stat_info.output_req,
	(unsigned long long) stat_info.control_req);

	ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
	(unsigned long long) stat_info.input_mb,
	(unsigned long long) stat_info.output_mb);

	ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
	(unsigned long long) stat_info.seconds_act);

	static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct Scsi_Host *scsi_host = class_to_shost(dev);
	struct zfcp_qdio *qdio =
	((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
	u64 util;

	spin_lock_bh(&qdio->stat_lock);
	util = qdio->req_q_util;
	spin_unlock_bh(&qdio->stat_lock);

	return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
	(unsigned long long)util);
	}
	static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);

	struct device_attribute *zfcp_sysfs_shost_attrs[] = {
	&dev_attr_utilization,
	&dev_attr_requests,
	&dev_attr_megabytes,
	&dev_attr_seconds_active,
	&dev_attr_queue_full,
	NULL
	};