1 files changed, 156 insertions, 131 deletions

diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c
index f539e006683..672b57219e1 100644
--- a/drivers/s390/scsi/zfcp_sysfs.c
+++ b/drivers/s390/scsi/zfcp_sysfs.c
@@ -3,12 +3,13 @@
  *
  * sysfs attributes.
  *
- * Copyright IBM Corporation 2008, 2009
+ * Copyright IBM Corp. 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) \
@@ -19,14 +20,23 @@ 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,	       \
-					       sysfs_device);		       \
+	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_ATTR_CONST(_feat, _name, _format, _value)		       \
+static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,	       \
+						   struct device_attribute *at,\
+						   char *buf)		       \
+{									       \
+	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,\
@@ -68,65 +78,91 @@ ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
 		  ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 
 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
-		 atomic_read(&unit->status));
+		 zfcp_unit_sdev_status(unit));
 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
-		 (atomic_read(&unit->status) &
+		 (zfcp_unit_sdev_status(unit) &
 		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
-		 (atomic_read(&unit->status) &
+		 (zfcp_unit_sdev_status(unit) &
 		  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,	       \
-					       sysfs_device);		       \
-									       \
-	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,	       \
-					       sysfs_device);		       \
-	unsigned long val;						       \
-	int retval = 0;							       \
-									       \
-	if (!(_feat && get_device(&_feat->sysfs_device)))		       \
-		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->sysfs_device);				       \
-	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_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
+ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
+
+static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
+
+	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
+		return sprintf(buf, "1\n");
+
+	return sprintf(buf, "0\n");
+}
+
+static ssize_t zfcp_sysfs_port_failed_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);
+	unsigned long val;
+
+	if (kstrtoul(buf, 0, &val) || val != 0)
+		return -EINVAL;
+
+	zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
+	zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
+	zfcp_erp_wait(port->adapter);
+
+	return count;
+}
+static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
+		     zfcp_sysfs_port_failed_show,
+		     zfcp_sysfs_port_failed_store);
+
+static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
+	struct scsi_device *sdev;
+	unsigned int status, failed = 1;
+
+	sdev = zfcp_unit_sdev(unit);
+	if (sdev) {
+		status = atomic_read(&sdev_to_zfcp(sdev)->status);
+		failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
+		scsi_device_put(sdev);
+	}
+
+	return sprintf(buf, "%d\n", failed);
+}
+
+static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
+	unsigned long val;
+	struct scsi_device *sdev;
+
+	if (kstrtoul(buf, 0, &val) || val != 0)
+		return -EINVAL;
 
-ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
-ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");
+	sdev = zfcp_unit_sdev(unit);
+	if (sdev) {
+		zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
+		zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
+				    "syufai2");
+		zfcp_erp_wait(unit->port->adapter);
+	} else
+		zfcp_unit_scsi_scan(unit);
+
+	return count;
+}
+static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
+		     zfcp_sysfs_unit_failed_show,
+		     zfcp_sysfs_unit_failed_store);
 
 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 					      struct device_attribute *attr,
@@ -160,15 +196,14 @@ static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 	if (!adapter)
 		return -ENODEV;
 
-	if (strict_strtoul(buf, 0, &val) || val != 0) {
+	if (kstrtoul(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_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
 	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
-				"syafai2", NULL);
+				"syafai2");
 	zfcp_erp_wait(adapter);
 out:
 	zfcp_ccw_adapter_put(adapter);
@@ -198,6 +233,8 @@ static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 		     zfcp_sysfs_port_rescan_store);
 
+DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
+
 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 					    struct device_attribute *attr,
 					    const char *buf, size_t count)
@@ -211,7 +248,7 @@ static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 	if (!adapter)
 		return -ENODEV;
 
-	if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
+	if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
 		goto out;
 
 	port = zfcp_get_port_by_wwpn(adapter, wwpn);
@@ -220,14 +257,24 @@ static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 	else
 		retval = 0;
 
+	mutex_lock(&zfcp_sysfs_port_units_mutex);
+	if (atomic_read(&port->units) > 0) {
+		retval = -EBUSY;
+		mutex_unlock(&zfcp_sysfs_port_units_mutex);
+		goto out;
+	}
+	/* port is about to be removed, so no more unit_add */
+	atomic_set(&port->units, -1);
+	mutex_unlock(&zfcp_sysfs_port_units_mutex);
+
 	write_lock_irq(&adapter->port_list_lock);
 	list_del(&port->list);
 	write_unlock_irq(&adapter->port_list_lock);
 
-	put_device(&port->sysfs_device);
+	put_device(&port->dev);
 
-	zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
-	zfcp_device_unregister(&port->sysfs_device, &zfcp_sysfs_port_attrs);
+	zfcp_erp_port_shutdown(port, 0, "syprs_1");
+	device_unregister(&port->dev);
  out:
 	zfcp_ccw_adapter_put(adapter);
 	return retval ? retval : (ssize_t) count;
@@ -258,30 +305,18 @@ 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,
-					      sysfs_device);
-	struct zfcp_unit *unit;
+	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 	u64 fcp_lun;
-	int retval = -EINVAL;
-
-	if (!(port && get_device(&port->sysfs_device)))
-		return -EBUSY;
+	int retval;
 
-	if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
-		goto out;
+	if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
+		return -EINVAL;
 
-	unit = zfcp_unit_enqueue(port, fcp_lun);
-	if (IS_ERR(unit))
-		goto out;
-	else
-		retval = 0;
+	retval = zfcp_unit_add(port, fcp_lun);
+	if (retval)
+		return retval;
 
-	zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
-	zfcp_erp_wait(unit->port->adapter);
-	flush_work(&unit->scsi_work);
-out:
-	put_device(&port->sysfs_device);
-	return retval ? retval : (ssize_t) count;
+	return count;
 }
 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 
@@ -289,38 +324,16 @@ 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,
-					      sysfs_device);
-	struct zfcp_unit *unit;
+	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 	u64 fcp_lun;
-	int retval = -EINVAL;
-
-	if (!(port && get_device(&port->sysfs_device)))
-		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;
+	if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
+		return -EINVAL;
 
-	/* wait for possible timeout during SCSI probe */
-	flush_work(&unit->scsi_work);
+	if (zfcp_unit_remove(port, fcp_lun))
+		return -EINVAL;
 
-	write_lock_irq(&port->unit_list_lock);
-	list_del(&unit->list);
-	write_unlock_irq(&port->unit_list_lock);
-
-	put_device(&unit->sysfs_device);
-
-	zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
-	zfcp_device_unregister(&unit->sysfs_device, &zfcp_sysfs_unit_attrs);
-out:
-	put_device(&port->sysfs_device);
-	return retval ? retval : (ssize_t) count;
+	return count;
 }
 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 
@@ -333,13 +346,13 @@ static struct attribute *zfcp_port_attrs[] = {
 	&dev_attr_port_access_denied.attr,
 	NULL
 };
-
-/**
- * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
- */
-struct attribute_group zfcp_sysfs_port_attrs = {
+static struct attribute_group zfcp_port_attr_group = {
 	.attrs = zfcp_port_attrs,
 };
+const struct attribute_group *zfcp_port_attr_groups[] = {
+	&zfcp_port_attr_group,
+	NULL,
+};
 
 static struct attribute *zfcp_unit_attrs[] = {
 	&dev_attr_unit_failed.attr,
@@ -350,10 +363,13 @@ static struct attribute *zfcp_unit_attrs[] = {
 	&dev_attr_unit_access_readonly.attr,
 	NULL
 };
-
-struct attribute_group zfcp_sysfs_unit_attrs = {
+static struct attribute_group zfcp_unit_attr_group = {
 	.attrs = zfcp_unit_attrs,
 };
+const struct attribute_group *zfcp_unit_attr_groups[] = {
+	&zfcp_unit_attr_group,
+	NULL,
+};
 
 #define ZFCP_DEFINE_LATENCY_ATTR(_name) 				\
 static ssize_t								\
@@ -361,9 +377,9 @@ 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;		\
+	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);		\
+	struct zfcp_latencies *lat = &zfcp_sdev->latencies;		\
+	struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;	\
 	unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;	\
 									\
 	spin_lock_bh(&lat->lock);					\
@@ -392,8 +408,8 @@ zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,		\
 					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;			\
+	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);		\
+	struct zfcp_latencies *lat = &zfcp_sdev->latencies;		\
 	unsigned long flags;						\
 									\
 	spin_lock_irqsave(&lat->lock, flags);				\
@@ -421,19 +437,28 @@ 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;			 \
+	struct scsi_device *sdev = to_scsi_device(dev);			 \
+	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);		 \
+	struct zfcp_port *port = zfcp_sdev->port;			 \
 									 \
 	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));
+		      dev_name(&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);
+		      (unsigned long long) port->wwpn);
+
+static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
+					    struct device_attribute *attr,
+					    char *buf)
+{
+	struct scsi_device *sdev = to_scsi_device(dev);
+
+	return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
+}
+static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 
 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 	&dev_attr_fcp_lun,