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ntsync: Introduce the ntsync driver and character device.
ntsync uses a misc device as the simplest and least intrusive uAPI interface. Each file description on the device represents an isolated NT instance, intended to correspond to a single NT virtual machine. Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com> Signed-off-by: Alexandre Frade <kernel@xanmod.org>
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// SPDX-License-Identifier: GPL-2.0-only | ||
/* | ||
* ntsync.c - Kernel driver for NT synchronization primitives | ||
* | ||
* Copyright (C) 2024 Elizabeth Figura <zfigura@codeweavers.com> | ||
*/ | ||
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#include <linux/fs.h> | ||
#include <linux/miscdevice.h> | ||
#include <linux/module.h> | ||
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#define NTSYNC_NAME "ntsync" | ||
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static int ntsync_char_open(struct inode *inode, struct file *file) | ||
{ | ||
return nonseekable_open(inode, file); | ||
} | ||
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static int ntsync_char_release(struct inode *inode, struct file *file) | ||
{ | ||
return 0; | ||
} | ||
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static long ntsync_char_ioctl(struct file *file, unsigned int cmd, | ||
unsigned long parm) | ||
{ | ||
switch (cmd) { | ||
default: | ||
return -ENOIOCTLCMD; | ||
} | ||
} | ||
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static const struct file_operations ntsync_fops = { | ||
.owner = THIS_MODULE, | ||
.open = ntsync_char_open, | ||
.release = ntsync_char_release, | ||
.unlocked_ioctl = ntsync_char_ioctl, | ||
.compat_ioctl = compat_ptr_ioctl, | ||
.llseek = no_llseek, | ||
}; | ||
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static struct miscdevice ntsync_misc = { | ||
.minor = MISC_DYNAMIC_MINOR, | ||
.name = NTSYNC_NAME, | ||
.fops = &ntsync_fops, | ||
}; | ||
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module_misc_device(ntsync_misc); | ||
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MODULE_AUTHOR("Elizabeth Figura <zfigura@codeweavers.com>"); | ||
MODULE_DESCRIPTION("Kernel driver for NT synchronization primitives"); | ||
MODULE_LICENSE("GPL"); |