forked from Minki/linux
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
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/*
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* 32bit compatibility wrappers for the input subsystem.
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*
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* Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
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*/
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#include <linux/export.h>
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#include <linux/uaccess.h>
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#include "input-compat.h"
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#ifdef CONFIG_COMPAT
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int input_event_from_user(const char __user *buffer,
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struct input_event *event)
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{
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if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) {
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struct input_event_compat compat_event;
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if (copy_from_user(&compat_event, buffer,
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sizeof(struct input_event_compat)))
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return -EFAULT;
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event->input_event_sec = compat_event.sec;
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event->input_event_usec = compat_event.usec;
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event->type = compat_event.type;
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event->code = compat_event.code;
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event->value = compat_event.value;
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} else {
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if (copy_from_user(event, buffer, sizeof(struct input_event)))
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return -EFAULT;
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}
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return 0;
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}
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int input_event_to_user(char __user *buffer,
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const struct input_event *event)
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{
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if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) {
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struct input_event_compat compat_event;
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compat_event.sec = event->input_event_sec;
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compat_event.usec = event->input_event_usec;
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compat_event.type = event->type;
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compat_event.code = event->code;
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compat_event.value = event->value;
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if (copy_to_user(buffer, &compat_event,
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sizeof(struct input_event_compat)))
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return -EFAULT;
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} else {
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if (copy_to_user(buffer, event, sizeof(struct input_event)))
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return -EFAULT;
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}
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return 0;
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}
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int input_ff_effect_from_user(const char __user *buffer, size_t size,
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struct ff_effect *effect)
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{
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if (in_compat_syscall()) {
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struct ff_effect_compat *compat_effect;
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if (size != sizeof(struct ff_effect_compat))
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return -EINVAL;
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/*
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* It so happens that the pointer which needs to be changed
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* is the last field in the structure, so we can retrieve the
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* whole thing and replace just the pointer.
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*/
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compat_effect = (struct ff_effect_compat *)effect;
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if (copy_from_user(compat_effect, buffer,
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sizeof(struct ff_effect_compat)))
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return -EFAULT;
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if (compat_effect->type == FF_PERIODIC &&
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compat_effect->u.periodic.waveform == FF_CUSTOM)
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effect->u.periodic.custom_data =
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compat_ptr(compat_effect->u.periodic.custom_data);
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} else {
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if (size != sizeof(struct ff_effect))
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return -EINVAL;
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if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
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return -EFAULT;
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}
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return 0;
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}
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#else
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int input_event_from_user(const char __user *buffer,
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struct input_event *event)
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{
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if (copy_from_user(event, buffer, sizeof(struct input_event)))
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return -EFAULT;
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return 0;
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}
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int input_event_to_user(char __user *buffer,
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const struct input_event *event)
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{
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if (copy_to_user(buffer, event, sizeof(struct input_event)))
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return -EFAULT;
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return 0;
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}
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int input_ff_effect_from_user(const char __user *buffer, size_t size,
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struct ff_effect *effect)
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{
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if (size != sizeof(struct ff_effect))
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return -EINVAL;
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if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
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return -EFAULT;
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return 0;
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}
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#endif /* CONFIG_COMPAT */
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EXPORT_SYMBOL_GPL(input_event_from_user);
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EXPORT_SYMBOL_GPL(input_event_to_user);
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EXPORT_SYMBOL_GPL(input_ff_effect_from_user);
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