static long ipmi_ioctl()

in ipmi/ipmi_devintf.c [294:616]

• 257 lines of code
• 48 McCabe index (conditional complexity)

static long ipmi_ioctl(struct file   *file,
		       unsigned int  cmd,
		       unsigned long data)
{
	int                      rv = -EINVAL;
	struct ipmi_file_private *priv = file->private_data;
	void __user *arg = (void __user *)data;

	switch (cmd) 
	{
	case IPMICTL_SEND_COMMAND:
	{
		struct ipmi_req req;
		int retries;
		unsigned int retry_time_ms;

		if (copy_from_user(&req, arg, sizeof(req))) {
			rv = -EFAULT;
			break;
		}

		mutex_lock(&priv->recv_mutex);
		retries = priv->default_retries;
		retry_time_ms = priv->default_retry_time_ms;
		mutex_unlock(&priv->recv_mutex);

		rv = handle_send_req(priv->user, &req, retries, retry_time_ms);
		break;
	}

	case IPMICTL_SEND_COMMAND_SETTIME:
	{
		struct ipmi_req_settime req;

		if (copy_from_user(&req, arg, sizeof(req))) {
			rv = -EFAULT;
			break;
		}

		rv = handle_send_req(priv->user,
				     &req.req,
				     req.retries,
				     req.retry_time_ms);
		break;
	}

	case IPMICTL_RECEIVE_MSG:
	case IPMICTL_RECEIVE_MSG_TRUNC:
	{
		struct ipmi_recv      rsp;

		if (copy_from_user(&rsp, arg, sizeof(rsp)))
			rv = -EFAULT;
		else
			rv = handle_recv(priv, cmd == IPMICTL_RECEIVE_MSG_TRUNC,
					 &rsp, copyout_recv, arg);
		break;
	}

	case IPMICTL_REGISTER_FOR_CMD:
	{
		struct ipmi_cmdspec val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
					   IPMI_CHAN_ALL);
		break;
	}

	case IPMICTL_UNREGISTER_FOR_CMD:
	{
		struct ipmi_cmdspec   val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
					     IPMI_CHAN_ALL);
		break;
	}

	case IPMICTL_REGISTER_FOR_CMD_CHANS:
	{
		struct ipmi_cmdspec_chans val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
					   val.chans);
		break;
	}

	case IPMICTL_UNREGISTER_FOR_CMD_CHANS:
	{
		struct ipmi_cmdspec_chans val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
					     val.chans);
		break;
	}

	case IPMICTL_SET_GETS_EVENTS_CMD:
	{
		int val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_set_gets_events(priv->user, val);
		break;
	}

	/* The next four are legacy, not per-channel. */
	case IPMICTL_SET_MY_ADDRESS_CMD:
	{
		unsigned int val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_set_my_address(priv->user, 0, val);
		break;
	}

	case IPMICTL_GET_MY_ADDRESS_CMD:
	{
		unsigned int  val;
		unsigned char rval;

		rv = ipmi_get_my_address(priv->user, 0, &rval);
		if (rv)
			break;

		val = rval;

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_MY_LUN_CMD:
	{
		unsigned int val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_set_my_LUN(priv->user, 0, val);
		break;
	}

	case IPMICTL_GET_MY_LUN_CMD:
	{
		unsigned int  val;
		unsigned char rval;

		rv = ipmi_get_my_LUN(priv->user, 0, &rval);
		if (rv)
			break;

		val = rval;

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		return ipmi_set_my_address(priv->user, val.channel, val.value);
	}

	case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_get_my_address(priv->user, val.channel, &val.value);
		if (rv)
			break;

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_MY_CHANNEL_LUN_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_set_my_LUN(priv->user, val.channel, val.value);
		break;
	}

	case IPMICTL_GET_MY_CHANNEL_LUN_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value);
		if (rv)
			break;

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_TIMING_PARMS_CMD:
	{
		struct ipmi_timing_parms parms;

		if (copy_from_user(&parms, arg, sizeof(parms))) {
			rv = -EFAULT;
			break;
		}

		mutex_lock(&priv->recv_mutex);
		priv->default_retries = parms.retries;
		priv->default_retry_time_ms = parms.retry_time_ms;
		mutex_unlock(&priv->recv_mutex);
		rv = 0;
		break;
	}

	case IPMICTL_GET_TIMING_PARMS_CMD:
	{
		struct ipmi_timing_parms parms;

		mutex_lock(&priv->recv_mutex);
		parms.retries = priv->default_retries;
		parms.retry_time_ms = priv->default_retry_time_ms;
		mutex_unlock(&priv->recv_mutex);

		if (copy_to_user(arg, &parms, sizeof(parms))) {
			rv = -EFAULT;
			break;
		}

		rv = 0;
		break;
	}

	case IPMICTL_GET_MAINTENANCE_MODE_CMD:
	{
		int mode;

		mode = ipmi_get_maintenance_mode(priv->user);
		if (copy_to_user(arg, &mode, sizeof(mode))) {
			rv = -EFAULT;
			break;
		}
		rv = 0;
		break;
	}

	case IPMICTL_SET_MAINTENANCE_MODE_CMD:
	{
		int mode;

		if (copy_from_user(&mode, arg, sizeof(mode))) {
			rv = -EFAULT;
			break;
		}
		rv = ipmi_set_maintenance_mode(priv->user, mode);
		break;
	}

	default:
		rv = -ENOTTY;
		break;
	}
  
	return rv;
}