73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
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/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_MISCDEVICE_H_
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#define _LINUX_MISCDEVICE_H_
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#define MISC_DYNAMIC_MINOR -1
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#include <linux/device.h>
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#include <linux/cdev.h>
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struct miscdevice {
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const char *name;
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struct device *this_device;
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const struct file_operations *fops;
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struct cdev *cdev;
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int minor;
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};
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extern struct class miscclass;
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static inline int
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misc_register(struct miscdevice *misc)
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{
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misc->this_device = device_create(&miscclass, &linux_rootdev, 0, misc,
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misc->name);
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misc->cdev = cdev_alloc();
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if (misc->cdev == NULL)
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return -ENOMEM;
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misc->cdev->owner = THIS_MODULE;
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misc->cdev->ops = misc->fops;
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kobject_set_name(&misc->cdev->kobj, misc->name);
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if (cdev_add(misc->cdev, misc->this_device->devt, 1))
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return -EINVAL;
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return (0);
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}
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static inline int
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misc_deregister(struct miscdevice *misc)
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{
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device_destroy(&miscclass, misc->this_device->devt);
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cdev_del(misc->cdev);
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return (0);
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}
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#endif /* _LINUX_MISCDEVICE_H_ */
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