mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* 32bit compatibility wrappers for the input subsystem.
|
|
*
|
|
* Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/uaccess.h>
|
|
#include "input-compat.h"
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
int input_event_from_user(const char __user *buffer,
|
|
struct input_event *event)
|
|
{
|
|
if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) {
|
|
struct input_event_compat compat_event;
|
|
|
|
if (copy_from_user(&compat_event, buffer,
|
|
sizeof(struct input_event_compat)))
|
|
return -EFAULT;
|
|
|
|
event->input_event_sec = compat_event.sec;
|
|
event->input_event_usec = compat_event.usec;
|
|
event->type = compat_event.type;
|
|
event->code = compat_event.code;
|
|
event->value = compat_event.value;
|
|
|
|
} else {
|
|
if (copy_from_user(event, buffer, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_event_to_user(char __user *buffer,
|
|
const struct input_event *event)
|
|
{
|
|
if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) {
|
|
struct input_event_compat compat_event;
|
|
|
|
compat_event.sec = event->input_event_sec;
|
|
compat_event.usec = event->input_event_usec;
|
|
compat_event.type = event->type;
|
|
compat_event.code = event->code;
|
|
compat_event.value = event->value;
|
|
|
|
if (copy_to_user(buffer, &compat_event,
|
|
sizeof(struct input_event_compat)))
|
|
return -EFAULT;
|
|
|
|
} else {
|
|
if (copy_to_user(buffer, event, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_ff_effect_from_user(const char __user *buffer, size_t size,
|
|
struct ff_effect *effect)
|
|
{
|
|
if (in_compat_syscall()) {
|
|
struct ff_effect_compat *compat_effect;
|
|
|
|
if (size != sizeof(struct ff_effect_compat))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* It so happens that the pointer which needs to be changed
|
|
* is the last field in the structure, so we can retrieve the
|
|
* whole thing and replace just the pointer.
|
|
*/
|
|
compat_effect = (struct ff_effect_compat *)effect;
|
|
|
|
if (copy_from_user(compat_effect, buffer,
|
|
sizeof(struct ff_effect_compat)))
|
|
return -EFAULT;
|
|
|
|
if (compat_effect->type == FF_PERIODIC &&
|
|
compat_effect->u.periodic.waveform == FF_CUSTOM)
|
|
effect->u.periodic.custom_data =
|
|
compat_ptr(compat_effect->u.periodic.custom_data);
|
|
} else {
|
|
if (size != sizeof(struct ff_effect))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
int input_event_from_user(const char __user *buffer,
|
|
struct input_event *event)
|
|
{
|
|
if (copy_from_user(event, buffer, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_event_to_user(char __user *buffer,
|
|
const struct input_event *event)
|
|
{
|
|
if (copy_to_user(buffer, event, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_ff_effect_from_user(const char __user *buffer, size_t size,
|
|
struct ff_effect *effect)
|
|
{
|
|
if (size != sizeof(struct ff_effect))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_COMPAT */
|
|
|
|
EXPORT_SYMBOL_GPL(input_event_from_user);
|
|
EXPORT_SYMBOL_GPL(input_event_to_user);
|
|
EXPORT_SYMBOL_GPL(input_ff_effect_from_user);
|