/* * 32bit compatibility wrappers for the input subsystem. * * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik * * 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. */ #include <linux/export.h> #include <asm/uaccess.h> #include "input-compat.h" #ifdef CONFIG_COMPAT int input_event_from_user(const char __user *buffer, struct input_event *event) { if (INPUT_COMPAT_TEST && !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->time.tv_sec = compat_event.time.tv_sec; event->time.tv_usec = compat_event.time.tv_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 (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) { struct input_event_compat compat_event; compat_event.time.tv_sec = event->time.tv_sec; compat_event.time.tv_usec = event->time.tv_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 (INPUT_COMPAT_TEST) { 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);