Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Philip Langdale |
519 |
95.23% |
1 |
14.29% |
| Deepa Dinamani |
8 |
1.47% |
1 |
14.29% |
| H. J. Lu |
6 |
1.10% |
1 |
14.29% |
| Andrew Morton |
6 |
1.10% |
1 |
14.29% |
| Paul Gortmaker |
3 |
0.55% |
1 |
14.29% |
| Thomas Gleixner |
2 |
0.37% |
1 |
14.29% |
| Linus Torvalds |
1 |
0.18% |
1 |
14.29% |
| Total |
545 |
|
7 |
|
// 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);