From 2d56f3a32c0e62f99c043d2579840f9731fe5855 Mon Sep 17 00:00:00 2001 From: Philip Langdale Date: Thu, 16 Oct 2008 22:31:42 -0400 Subject: Input: refactor evdev 32bit compat to be shareable with uinput Currently, evdev has working 32bit compatibility and uinput does not. uinput needs the input_event code that evdev uses, so let's refactor it so it can be shared. [dtor@mail.ru: add fix for force feedback compat issues] Signed-off-by: Philip Langdale Signed-off-by: Dmitry Torokhov --- drivers/input/evdev.c | 197 ++------------------------------------------------ 1 file changed, 8 insertions(+), 189 deletions(-) (limited to 'drivers/input/evdev.c') diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 3524bef62be6..377b2007377e 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -19,7 +19,7 @@ #include #include #include -#include +#include "input-compat.h" struct evdev { int exist; @@ -291,187 +291,6 @@ static int evdev_open(struct inode *inode, struct file *file) return error; } -#ifdef CONFIG_COMPAT - -struct input_event_compat { - struct compat_timeval time; - __u16 type; - __u16 code; - __s32 value; -}; - -struct ff_periodic_effect_compat { - __u16 waveform; - __u16 period; - __s16 magnitude; - __s16 offset; - __u16 phase; - - struct ff_envelope envelope; - - __u32 custom_len; - compat_uptr_t custom_data; -}; - -struct ff_effect_compat { - __u16 type; - __s16 id; - __u16 direction; - struct ff_trigger trigger; - struct ff_replay replay; - - union { - struct ff_constant_effect constant; - struct ff_ramp_effect ramp; - struct ff_periodic_effect_compat periodic; - struct ff_condition_effect condition[2]; /* One for each axis */ - struct ff_rumble_effect rumble; - } u; -}; - -/* Note to the author of this code: did it ever occur to - you why the ifdefs are needed? Think about it again. -AK */ -#ifdef CONFIG_X86_64 -# define COMPAT_TEST is_compat_task() -#elif defined(CONFIG_IA64) -# define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current)) -#elif defined(CONFIG_S390) -# define COMPAT_TEST test_thread_flag(TIF_31BIT) -#elif defined(CONFIG_MIPS) -# define COMPAT_TEST test_thread_flag(TIF_32BIT_ADDR) -#else -# define COMPAT_TEST test_thread_flag(TIF_32BIT) -#endif - -static inline size_t evdev_event_size(void) -{ - return COMPAT_TEST ? - sizeof(struct input_event_compat) : sizeof(struct input_event); -} - -static int evdev_event_from_user(const char __user *buffer, - struct input_event *event) -{ - if (COMPAT_TEST) { - 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; -} - -static int evdev_event_to_user(char __user *buffer, - const struct input_event *event) -{ - if (COMPAT_TEST) { - 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; -} - -static int evdev_ff_effect_from_user(const char __user *buffer, size_t size, - struct ff_effect *effect) -{ - if (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 copy 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 - -static inline size_t evdev_event_size(void) -{ - return sizeof(struct input_event); -} - -static int evdev_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; -} - -static int evdev_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; -} - -static int evdev_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 */ - static ssize_t evdev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { @@ -491,14 +310,14 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer, while (retval < count) { - if (evdev_event_from_user(buffer + retval, &event)) { + if (input_event_from_user(buffer + retval, &event)) { retval = -EFAULT; goto out; } input_inject_event(&evdev->handle, event.type, event.code, event.value); - retval += evdev_event_size(); + retval += input_event_size(); } out: @@ -532,7 +351,7 @@ static ssize_t evdev_read(struct file *file, char __user *buffer, struct input_event event; int retval; - if (count < evdev_event_size()) + if (count < input_event_size()) return -EINVAL; if (client->head == client->tail && evdev->exist && @@ -547,13 +366,13 @@ static ssize_t evdev_read(struct file *file, char __user *buffer, if (!evdev->exist) return -ENODEV; - while (retval + evdev_event_size() <= count && + while (retval + input_event_size() <= count && evdev_fetch_next_event(client, &event)) { - if (evdev_event_to_user(buffer + retval, &event)) + if (input_event_to_user(buffer + retval, &event)) return -EFAULT; - retval += evdev_event_size(); + retval += input_event_size(); } return retval; @@ -824,7 +643,7 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, if (_IOC_NR(cmd) == _IOC_NR(EVIOCSFF)) { - if (evdev_ff_effect_from_user(p, _IOC_SIZE(cmd), &effect)) + if (input_ff_effect_from_user(p, _IOC_SIZE(cmd), &effect)) return -EFAULT; error = input_ff_upload(dev, &effect, file); -- cgit v1.2.1