static void __init zfcp_init_device_configure(void)
{
struct zfcp_adapter *adapter;
struct zfcp_port *port;
struct zfcp_unit *unit;
down(&zfcp_data.config_sema);
read_lock_irq(&zfcp_data.config_lock);
adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid);
if (adapter)
zfcp_adapter_get(adapter);
read_unlock_irq(&zfcp_data.config_lock);
if (!adapter)
goto out_adapter;
port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0);
if (IS_ERR(port))
goto out_port;
unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun);
if (IS_ERR(unit))
goto out_unit;
up(&zfcp_data.config_sema);
ccw_device_set_online(adapter->ccw_device);
zfcp_erp_wait(adapter);
down(&zfcp_data.config_sema);
zfcp_unit_put(unit);
out_unit:
zfcp_port_put(port);
out_port:
zfcp_adapter_put(adapter);
out_adapter:
up(&zfcp_data.config_sema);
return;
}
static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct zfcp_unit *unit = act->unit;
switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
zfcp_unit_put(unit);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT:
if (result == ZFCP_ERP_SUCCEEDED)
zfcp_scsi_schedule_rport_register(port);
/* fall through */
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
zfcp_port_put(port);
break;
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (result == ZFCP_ERP_SUCCEEDED) {
register_service_level(&adapter->service_level);
queue_work(adapter->work_queue, &adapter->scan_work);
} else
unregister_service_level(&adapter->service_level);
zfcp_adapter_put(adapter);
break;
}
}
static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct zfcp_unit *unit = act->unit;
switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
if ((result == ZFCP_ERP_SUCCEEDED) && !unit->device) {
zfcp_unit_get(unit);
if (scsi_queue_work(unit->port->adapter->scsi_host,
&unit->scsi_work) <= 0)
zfcp_unit_put(unit);
}
zfcp_unit_put(unit);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
case ZFCP_ERP_ACTION_REOPEN_PORT:
if (result == ZFCP_ERP_SUCCEEDED)
zfcp_scsi_schedule_rport_register(port);
zfcp_port_put(port);
break;
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (result == ZFCP_ERP_SUCCEEDED) {
register_service_level(&adapter->service_level);
schedule_work(&adapter->scan_work);
} else
unregister_service_level(&adapter->service_level);
zfcp_adapter_put(adapter);
break;
}
}
/**
* 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;
}
/**
* zfcp_port_dequeue - dequeues a port from the port list of the adapter
* @port: pointer to struct zfcp_port which should be removed
*/
void zfcp_port_dequeue(struct zfcp_port *port)
{
write_lock_irq(&zfcp_data.config_lock);
list_del(&port->list);
write_unlock_irq(&zfcp_data.config_lock);
if (cancel_work_sync(&port->gid_pn_work))
zfcp_port_put(port);
if (cancel_work_sync(&port->rport_work))
zfcp_port_put(port);
if (cancel_work_sync(&port->test_link_work))
zfcp_port_put(port);
wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
zfcp_adapter_put(port->adapter);
sysfs_remove_group(&port->sysfs_device.kobj, &zfcp_sysfs_port_attrs);
device_unregister(&port->sysfs_device);
}
static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter)
{
struct zfcp_port *port;
port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
adapter->peer_d_id);
if (IS_ERR(port)) /* error or port already attached */
return;
_zfcp_erp_port_reopen(port, 0, "ereptp1", NULL);
zfcp_port_put(port);
}
/**
* zfcp_unit_dequeue - dequeue unit
* @unit: pointer to zfcp_unit
*
* waits until all work is done on unit and removes it then from the unit->list
* of the associated port.
*/
void zfcp_unit_dequeue(struct zfcp_unit *unit)
{
wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
write_lock_irq(&zfcp_data.config_lock);
list_del(&unit->list);
write_unlock_irq(&zfcp_data.config_lock);
zfcp_port_put(unit->port);
sysfs_remove_group(&unit->sysfs_device.kobj, &zfcp_sysfs_unit_attrs);
device_unregister(&unit->sysfs_device);
}
/**
* zfcp_unit_dequeue - dequeue unit
* @unit: pointer to zfcp_unit
*
* waits until all work is done on unit and removes it then from the unit->list
* of the associated port.
*/
void zfcp_unit_dequeue(struct zfcp_unit *unit)
{
zfcp_unit_wait(unit);
write_lock_irq(&zfcp_data.config_lock);
list_del(&unit->list);
write_unlock_irq(&zfcp_data.config_lock);
unit->port->units--;
zfcp_port_put(unit->port);
sysfs_remove_group(&unit->sysfs_device.kobj, &zfcp_sysfs_unit_attrs);
device_unregister(&unit->sysfs_device);
}
static int zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
{
struct zfcp_port *port;
port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
ZFCP_DID_DIRECTORY_SERVICE);
if (IS_ERR(port))
return PTR_ERR(port);
zfcp_port_put(port);
return 0;
}
void zfcp_erp_port_strategy_open_lookup(struct work_struct *work)
{
int retval;
struct zfcp_port *port = container_of(work, struct zfcp_port,
gid_pn_work);
retval = zfcp_fc_ns_gid_pn(&port->erp_action);
if (retval == -ENOMEM)
zfcp_erp_notify(&port->erp_action, ZFCP_ERP_NOMEM);
port->erp_action.step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
if (retval)
zfcp_erp_notify(&port->erp_action, ZFCP_ERP_FAILED);
zfcp_port_put(port);
}
/**
* 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 void __init zfcp_init_device_configure(char *busid, u64 wwpn, u64 lun)
{
struct ccw_device *ccwdev;
struct zfcp_adapter *adapter;
struct zfcp_port *port;
struct zfcp_unit *unit;
ccwdev = get_ccwdev_by_busid(&zfcp_ccw_driver, busid);
if (!ccwdev)
return;
if (ccw_device_set_online(ccwdev))
goto out_ccwdev;
mutex_lock(&zfcp_data.config_mutex);
adapter = dev_get_drvdata(&ccwdev->dev);
if (!adapter)
goto out_unlock;
zfcp_adapter_get(adapter);
port = zfcp_get_port_by_wwpn(adapter, wwpn);
if (!port)
goto out_port;
zfcp_port_get(port);
unit = zfcp_unit_enqueue(port, lun);
if (IS_ERR(unit))
goto out_unit;
mutex_unlock(&zfcp_data.config_mutex);
zfcp_erp_unit_reopen(unit, 0, "auidc_1", NULL);
zfcp_erp_wait(adapter);
flush_work(&unit->scsi_work);
mutex_lock(&zfcp_data.config_mutex);
zfcp_unit_put(unit);
out_unit:
zfcp_port_put(port);
out_port:
zfcp_adapter_put(adapter);
out_unlock:
mutex_unlock(&zfcp_data.config_mutex);
out_ccwdev:
put_device(&ccwdev->dev);
return;
}
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 = dev_get_drvdata(dev);
struct zfcp_port *port;
u64 wwpn;
int retval = 0;
LIST_HEAD(port_remove_lh);
mutex_lock(&zfcp_data.config_mutex);
if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
retval = -EBUSY;
goto out;
}
if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) {
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, &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, "syprs_1", NULL);
zfcp_erp_wait(adapter);
zfcp_port_put(port);
zfcp_port_dequeue(port);
out:
mutex_unlock(&zfcp_data.config_mutex);
return retval ? retval : (ssize_t) count;
}
static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
int p_status = atomic_read(&port->status);
switch (act->step) {
case ZFCP_ERP_STEP_UNINITIALIZED:
case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
case ZFCP_ERP_STEP_PORT_CLOSING:
if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
return zfcp_erp_open_ptp_port(act);
if (!port->d_id) {
zfcp_port_get(port);
if (!queue_work(adapter->work_queue,
&port->gid_pn_work))
zfcp_port_put(port);
return ZFCP_ERP_EXIT;
}
return zfcp_erp_port_strategy_open_port(act);
case ZFCP_ERP_STEP_PORT_OPENING:
/* D_ID might have changed during open */
if (p_status & ZFCP_STATUS_COMMON_OPEN) {
if (port->d_id)
return ZFCP_ERP_SUCCEEDED;
else {
act->step = ZFCP_ERP_STEP_PORT_CLOSING;
return ZFCP_ERP_CONTINUES;
}
}
if (port->d_id && !(p_status & ZFCP_STATUS_COMMON_NOESC)) {
port->d_id = 0;
_zfcp_erp_port_reopen(port, 0, "erpsoc1", NULL);
return ZFCP_ERP_EXIT;
}
/* fall through otherwise */
}
return ZFCP_ERP_FAILED;
}
static void __init zfcp_init_device_configure(char *busid, u64 wwpn, u64 lun)
{
struct zfcp_adapter *adapter;
struct zfcp_port *port;
struct zfcp_unit *unit;
down(&zfcp_data.config_sema);
read_lock_irq(&zfcp_data.config_lock);
adapter = zfcp_get_adapter_by_busid(busid);
if (adapter)
zfcp_adapter_get(adapter);
read_unlock_irq(&zfcp_data.config_lock);
if (!adapter)
goto out_adapter;
port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
if (IS_ERR(port))
goto out_port;
unit = zfcp_unit_enqueue(port, lun);
if (IS_ERR(unit))
goto out_unit;
up(&zfcp_data.config_sema);
ccw_device_set_online(adapter->ccw_device);
zfcp_erp_wait(adapter);
wait_event(adapter->erp_done_wqh,
!(atomic_read(&unit->status) &
ZFCP_STATUS_UNIT_SCSI_WORK_PENDING));
down(&zfcp_data.config_sema);
zfcp_unit_put(unit);
out_unit:
zfcp_port_put(port);
out_port:
zfcp_adapter_put(adapter);
out_adapter:
up(&zfcp_data.config_sema);
return;
}
static void __init zfcp_init_device_configure(char *busid, u64 wwpn, u64 lun)
{
struct zfcp_adapter *adapter;
struct zfcp_port *port;
struct zfcp_unit *unit;
mutex_lock(&zfcp_data.config_mutex);
read_lock_irq(&zfcp_data.config_lock);
adapter = zfcp_get_adapter_by_busid(busid);
if (adapter)
zfcp_adapter_get(adapter);
read_unlock_irq(&zfcp_data.config_lock);
if (!adapter)
goto out_adapter;
port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
if (IS_ERR(port))
goto out_port;
unit = zfcp_unit_enqueue(port, lun);
if (IS_ERR(unit))
goto out_unit;
mutex_unlock(&zfcp_data.config_mutex);
ccw_device_set_online(adapter->ccw_device);
zfcp_erp_wait(adapter);
flush_work(&unit->scsi_work);
mutex_lock(&zfcp_data.config_mutex);
zfcp_unit_put(unit);
out_unit:
zfcp_port_put(port);
out_port:
zfcp_adapter_put(adapter);
out_adapter:
mutex_unlock(&zfcp_data.config_mutex);
return;
}