/**
* 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 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;
}