/***
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*
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* rtmac/nomac/nomac_ioctl.c
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*
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* RTmac - real-time networking media access control subsystem
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* Copyright (C) 2002 Marc Kleine-Budde <kleine-budde@gmx.de>,
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* 2003, 2004 Jan Kiszka <Jan.Kiszka@web.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/module.h>
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#include <linux/uaccess.h>
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#include <nomac_chrdev.h>
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#include <rtmac/nomac/nomac.h>
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static int nomac_ioctl_attach(struct rtnet_device *rtdev)
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{
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struct nomac_priv *nomac;
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int ret;
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if (rtdev->mac_priv == NULL) {
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ret = rtmac_disc_attach(rtdev, &nomac_disc);
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if (ret < 0)
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return ret;
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}
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nomac = (struct nomac_priv *)rtdev->mac_priv->disc_priv;
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if (nomac->magic != NOMAC_MAGIC)
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return -ENOTTY;
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/* ... */
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return 0;
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}
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static int nomac_ioctl_detach(struct rtnet_device *rtdev)
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{
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struct nomac_priv *nomac;
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int ret;
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if (rtdev->mac_priv == NULL)
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return -ENOTTY;
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nomac = (struct nomac_priv *)rtdev->mac_priv->disc_priv;
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if (nomac->magic != NOMAC_MAGIC)
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return -ENOTTY;
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ret = rtmac_disc_detach(rtdev);
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/* ... */
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return ret;
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}
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int nomac_ioctl(struct rtnet_device *rtdev, unsigned int request,
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unsigned long arg)
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{
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struct nomac_config cfg;
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int ret;
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ret = copy_from_user(&cfg, (void *)arg, sizeof(cfg));
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if (ret != 0)
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return -EFAULT;
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if (mutex_lock_interruptible(&rtdev->nrt_lock))
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return -ERESTARTSYS;
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switch (request) {
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case NOMAC_IOC_ATTACH:
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ret = nomac_ioctl_attach(rtdev);
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break;
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case NOMAC_IOC_DETACH:
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ret = nomac_ioctl_detach(rtdev);
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break;
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default:
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ret = -ENOTTY;
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}
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mutex_unlock(&rtdev->nrt_lock);
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return ret;
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}
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