drivers/s390/scsi/zfcp_sysfs_adapter.c - linux - Git at Google

 /*
  * linux/drivers/s390/scsi/zfcp_sysfs_adapter.c
  *
  * FCP adapter driver for IBM eServer zSeries
  *
  * sysfs adapter related routines
  *
  * (C) Copyright IBM Corp. 2003, 2004
  *
  * Authors:
  *      Martin Peschke <mpeschke@de.ibm.com>
  *	Heiko Carstens <heiko.carstens@de.ibm.com>
  *      Andreas Herrmann <aherrman@de.ibm.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2, or (at your option)
  * any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #define ZFCP_SYSFS_ADAPTER_C_REVISION "$Revision: 1.38 $"

 #include "zfcp_ext.h"

 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG

 static const char fc_topologies[5][25] = {
 	"<error>",
 	"point-to-point",
 	"fabric",
 	"arbitrated loop",
 	"fabric (virt. adapter)"
 };

 /**
  * ZFCP_DEFINE_ADAPTER_ATTR
  * @_name:   name of show attribute
  * @_format: format string
  * @_value:  value to print
  *
  * Generates attributes for an adapter.
  */
 #define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value)                      \
 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, struct device_attribute *attr,          \
 						 char *buf)                   \
 {                                                                             \
 	struct zfcp_adapter *adapter;                                         \
                                                                               \
 	adapter = dev_get_drvdata(dev);                                       \
 	return sprintf(buf, _format, _value);                                 \
 }                                                                             \
                                                                               \
 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);

 ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
 ZFCP_DEFINE_ADAPTER_ATTR(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn);
 ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn);
 ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
 ZFCP_DEFINE_ADAPTER_ATTR(physical_wwpn, "0x%016llx\n", adapter->physical_wwpn);
 ZFCP_DEFINE_ADAPTER_ATTR(physical_s_id, "0x%06x\n", adapter->physical_s_id);
 ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
 ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
 ZFCP_DEFINE_ADAPTER_ATTR(fc_topology, "%s\n",
 			 fc_topologies[adapter->fc_topology]);
 ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
 			 adapter->hardware_version);
 ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask
 			 (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status));

 /**
  * zfcp_sysfs_port_add_store - add a port to sysfs tree
  * @dev: pointer to belonging device
  * @buf: pointer to input buffer
  * @count: number of bytes in buffer
  *
  * Store function of the "port_add" attribute of an adapter.
  */
 static ssize_t
 zfcp_sysfs_port_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
 	wwn_t wwpn;
 	char *endp;
 	struct zfcp_adapter *adapter;
 	struct zfcp_port *port;
 	int retval = -EINVAL;

 	down(&zfcp_data.config_sema);

 	adapter = dev_get_drvdata(dev);
 	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 		retval = -EBUSY;
 		goto out;
 	}

 	wwpn = simple_strtoull(buf, &endp, 0);
 	if ((endp + 1) < (buf + count))
 		goto out;

 	port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
 	if (!port)
 		goto out;

 	retval = 0;

 	zfcp_erp_port_reopen(port, 0);
 	zfcp_erp_wait(port->adapter);
 	zfcp_port_put(port);
  out:
 	up(&zfcp_data.config_sema);
 	return retval ? retval : (ssize_t) count;
 }

 static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store);

 /**
  * zfcp_sysfs_port_remove_store - remove a port from sysfs tree
  * @dev: pointer to belonging device
  * @buf: pointer to input buffer
  * @count: number of bytes in buffer
  *
  * Store function of the "port_remove" attribute of an adapter.
  */
 static ssize_t
 zfcp_sysfs_port_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct zfcp_adapter *adapter;
 	struct zfcp_port *port;
 	wwn_t wwpn;
 	char *endp;
 	int retval = 0;

 	down(&zfcp_data.config_sema);

 	adapter = dev_get_drvdata(dev);
 	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 		retval = -EBUSY;
 		goto out;
 	}

 	wwpn = simple_strtoull(buf, &endp, 0);
 	if ((endp + 1) < (buf + count)) {
 		retval = -EINVAL;
 		goto out;
 	}

 	write_lock_irq(&zfcp_data.config_lock);
 	port = zfcp_get_port_by_wwpn(adapter, wwpn);
 	if (port && (atomic_read(&port->refcount) == 0)) {
 		zfcp_port_get(port);
 		atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 		list_move(&port->list, &adapter->port_remove_lh);
 	}
 	else {
 		port = NULL;
 	}
 	write_unlock_irq(&zfcp_data.config_lock);

 	if (!port) {
 		retval = -ENXIO;
 		goto out;
 	}

 	zfcp_erp_port_shutdown(port, 0);
 	zfcp_erp_wait(adapter);
 	zfcp_port_put(port);
 	zfcp_port_dequeue(port);
  out:
 	up(&zfcp_data.config_sema);
 	return retval ? retval : (ssize_t) count;
 }

 static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);

 /**
  * zfcp_sysfs_adapter_failed_store - failed state of adapter
  * @dev: pointer to belonging device
  * @buf: pointer to input buffer
  * @count: number of bytes in buffer
  *
  * Store function of the "failed" attribute of an adapter.
  * If a "0" gets written to "failed", error recovery will be
  * started for the belonging adapter.
  */
 static ssize_t
 zfcp_sysfs_adapter_failed_store(struct device *dev, struct device_attribute *attr,
 				const char *buf, size_t count)
 {
 	struct zfcp_adapter *adapter;
 	unsigned int val;
 	char *endp;
 	int retval = 0;

 	down(&zfcp_data.config_sema);

 	adapter = dev_get_drvdata(dev);
 	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 		retval = -EBUSY;
 		goto out;
 	}

 	val = simple_strtoul(buf, &endp, 0);
 	if (((endp + 1) < (buf + count)) || (val != 0)) {
 		retval = -EINVAL;
 		goto out;
 	}

 	zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
 				       ZFCP_SET);
 	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 	zfcp_erp_wait(adapter);
  out:
 	up(&zfcp_data.config_sema);
 	return retval ? retval : (ssize_t) count;
 }

 /**
  * zfcp_sysfs_adapter_failed_show - failed state of adapter
  * @dev: pointer to belonging device
  * @buf: pointer to input buffer
  *
  * Show function of "failed" attribute of adapter. Will be
  * "0" if adapter is working, otherwise "1".
  */
 static ssize_t
 zfcp_sysfs_adapter_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct zfcp_adapter *adapter;

 	adapter = dev_get_drvdata(dev);
 	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
 		return sprintf(buf, "1\n");
 	else
 		return sprintf(buf, "0\n");
 }

 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show,
 		   zfcp_sysfs_adapter_failed_store);

 static struct attribute *zfcp_adapter_attrs[] = {
 	&dev_attr_failed.attr,
 	&dev_attr_in_recovery.attr,
 	&dev_attr_port_remove.attr,
 	&dev_attr_port_add.attr,
 	&dev_attr_peer_wwnn.attr,
 	&dev_attr_peer_wwpn.attr,
 	&dev_attr_peer_d_id.attr,
 	&dev_attr_physical_wwpn.attr,
 	&dev_attr_physical_s_id.attr,
 	&dev_attr_card_version.attr,
 	&dev_attr_lic_version.attr,
 	&dev_attr_fc_topology.attr,
 	&dev_attr_status.attr,
 	&dev_attr_hardware_version.attr,
 	NULL
 };

 static struct attribute_group zfcp_adapter_attr_group = {
 	.attrs = zfcp_adapter_attrs,
 };

 /**
  * zfcp_sysfs_create_adapter_files - create sysfs adapter files
  * @dev: pointer to belonging device
  *
  * Create all attributes of the sysfs representation of an adapter.
  */
 int
 zfcp_sysfs_adapter_create_files(struct device *dev)
 {
 	return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
 }

 /**
  * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
  * @dev: pointer to belonging device
  *
  * Remove all attributes of the sysfs representation of an adapter.
  */
 void
 zfcp_sysfs_adapter_remove_files(struct device *dev)
 {
 	sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
 }

 #undef ZFCP_LOG_AREA
	/*
	* linux/drivers/s390/scsi/zfcp_sysfs_adapter.c
	*
	* FCP adapter driver for IBM eServer zSeries
	*
	* sysfs adapter related routines
	*
	* (C) Copyright IBM Corp. 2003, 2004
	*
	* Authors:
	* Martin Peschke <mpeschke@de.ibm.com>
	* Heiko Carstens <heiko.carstens@de.ibm.com>
	* Andreas Herrmann <aherrman@de.ibm.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2, or (at your option)
	* any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#define ZFCP_SYSFS_ADAPTER_C_REVISION "$Revision: 1.38 $"

	#include "zfcp_ext.h"

	#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG

	static const char fc_topologies[5][25] = {
	"<error>",
	"point-to-point",
	"fabric",
	"arbitrated loop",
	"fabric (virt. adapter)"
	};

	/**
	* ZFCP_DEFINE_ADAPTER_ATTR
	* @_name: name of show attribute
	* @_format: format string
	* @_value: value to print
	*
	* Generates attributes for an adapter.
	*/
	#define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value) \
	static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device dev, struct device_attribute attr, \
	char *buf) \
	{ \
	struct zfcp_adapter *adapter; \
	\
	adapter = dev_get_drvdata(dev); \
	return sprintf(buf, _format, _value); \
	} \
	\
	static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);

	ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
	ZFCP_DEFINE_ADAPTER_ATTR(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn);
	ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn);
	ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
	ZFCP_DEFINE_ADAPTER_ATTR(physical_wwpn, "0x%016llx\n", adapter->physical_wwpn);
	ZFCP_DEFINE_ADAPTER_ATTR(physical_s_id, "0x%06x\n", adapter->physical_s_id);
	ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
	ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
	ZFCP_DEFINE_ADAPTER_ATTR(fc_topology, "%s\n",
	fc_topologies[adapter->fc_topology]);
	ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
	adapter->hardware_version);
	ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask
	(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status));

	/**
	* zfcp_sysfs_port_add_store - add a port to sysfs tree
	* @dev: pointer to belonging device
	* @buf: pointer to input buffer
	* @count: number of bytes in buffer
	*
	* Store function of the "port_add" attribute of an adapter.
	*/
	static ssize_t
	zfcp_sysfs_port_add_store(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	{
	wwn_t wwpn;
	char *endp;
	struct zfcp_adapter *adapter;
	struct zfcp_port *port;
	int retval = -EINVAL;

	down(&zfcp_data.config_sema);

	adapter = dev_get_drvdata(dev);
	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
	retval = -EBUSY;
	goto out;
	}

	wwpn = simple_strtoull(buf, &endp, 0);
	if ((endp + 1) < (buf + count))
	goto out;

	port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
	if (!port)
	goto out;

	retval = 0;

	zfcp_erp_port_reopen(port, 0);
	zfcp_erp_wait(port->adapter);
	zfcp_port_put(port);
	out:
	up(&zfcp_data.config_sema);
	return retval ? retval : (ssize_t) count;
	}

	static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store);

	/**
	* zfcp_sysfs_port_remove_store - remove a port from sysfs tree
	* @dev: pointer to belonging device
	* @buf: pointer to input buffer
	* @count: number of bytes in buffer
	*
	* Store function of the "port_remove" attribute of an adapter.
	*/
	static ssize_t
	zfcp_sysfs_port_remove_store(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	{
	struct zfcp_adapter *adapter;
	struct zfcp_port *port;
	wwn_t wwpn;
	char *endp;
	int retval = 0;

	down(&zfcp_data.config_sema);

	adapter = dev_get_drvdata(dev);
	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
	retval = -EBUSY;
	goto out;
	}

	wwpn = simple_strtoull(buf, &endp, 0);
	if ((endp + 1) < (buf + count)) {
	retval = -EINVAL;
	goto out;
	}

	write_lock_irq(&zfcp_data.config_lock);
	port = zfcp_get_port_by_wwpn(adapter, wwpn);
	if (port && (atomic_read(&port->refcount) == 0)) {
	zfcp_port_get(port);
	atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
	list_move(&port->list, &adapter->port_remove_lh);
	}
	else {
	port = NULL;
	}
	write_unlock_irq(&zfcp_data.config_lock);

	if (!port) {
	retval = -ENXIO;
	goto out;
	}

	zfcp_erp_port_shutdown(port, 0);
	zfcp_erp_wait(adapter);
	zfcp_port_put(port);
	zfcp_port_dequeue(port);
	out:
	up(&zfcp_data.config_sema);
	return retval ? retval : (ssize_t) count;
	}

	static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);

	/**
	* zfcp_sysfs_adapter_failed_store - failed state of adapter
	* @dev: pointer to belonging device
	* @buf: pointer to input buffer
	* @count: number of bytes in buffer
	*
	* Store function of the "failed" attribute of an adapter.
	* If a "0" gets written to "failed", error recovery will be
	* started for the belonging adapter.
	*/
	static ssize_t
	zfcp_sysfs_adapter_failed_store(struct device dev, struct device_attribute attr,
	const char *buf, size_t count)
	{
	struct zfcp_adapter *adapter;
	unsigned int val;
	char *endp;
	int retval = 0;

	down(&zfcp_data.config_sema);

	adapter = dev_get_drvdata(dev);
	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
	retval = -EBUSY;
	goto out;
	}

	val = simple_strtoul(buf, &endp, 0);
	if (((endp + 1) < (buf + count)) \|\| (val != 0)) {
	retval = -EINVAL;
	goto out;
	}

	zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
	ZFCP_SET);
	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
	zfcp_erp_wait(adapter);
	out:
	up(&zfcp_data.config_sema);
	return retval ? retval : (ssize_t) count;
	}

	/**
	* zfcp_sysfs_adapter_failed_show - failed state of adapter
	* @dev: pointer to belonging device
	* @buf: pointer to input buffer
	*
	* Show function of "failed" attribute of adapter. Will be
	* "0" if adapter is working, otherwise "1".
	*/
	static ssize_t
	zfcp_sysfs_adapter_failed_show(struct device dev, struct device_attribute attr, char *buf)
	{
	struct zfcp_adapter *adapter;

	adapter = dev_get_drvdata(dev);
	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
	return sprintf(buf, "1\n");
	else
	return sprintf(buf, "0\n");
	}

	static DEVICE_ATTR(failed, S_IWUSR \| S_IRUGO, zfcp_sysfs_adapter_failed_show,
	zfcp_sysfs_adapter_failed_store);

	static struct attribute *zfcp_adapter_attrs[] = {
	&dev_attr_failed.attr,
	&dev_attr_in_recovery.attr,
	&dev_attr_port_remove.attr,
	&dev_attr_port_add.attr,
	&dev_attr_peer_wwnn.attr,
	&dev_attr_peer_wwpn.attr,
	&dev_attr_peer_d_id.attr,
	&dev_attr_physical_wwpn.attr,
	&dev_attr_physical_s_id.attr,
	&dev_attr_card_version.attr,
	&dev_attr_lic_version.attr,
	&dev_attr_fc_topology.attr,
	&dev_attr_status.attr,
	&dev_attr_hardware_version.attr,
	NULL
	};

	static struct attribute_group zfcp_adapter_attr_group = {
	.attrs = zfcp_adapter_attrs,
	};

	/**
	* zfcp_sysfs_create_adapter_files - create sysfs adapter files
	* @dev: pointer to belonging device
	*
	* Create all attributes of the sysfs representation of an adapter.
	*/
	int
	zfcp_sysfs_adapter_create_files(struct device *dev)
	{
	return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
	}

	/**
	* zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
	* @dev: pointer to belonging device
	*
	* Remove all attributes of the sysfs representation of an adapter.
	*/
	void
	zfcp_sysfs_adapter_remove_files(struct device *dev)
	{
	sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
	}

	#undef ZFCP_LOG_AREA