return 0;
}
-static int uinput_setup_device(struct uinput_device *udev,
- const char __user *buffer, size_t count)
+static int uinput_dev_setup(struct uinput_device *udev,
+ struct uinput_setup __user *arg)
+{
+ struct uinput_setup setup;
+ struct input_dev *dev;
+ int retval;
+
+ if (udev->state == UIST_CREATED)
+ return -EINVAL;
+
+ if (copy_from_user(&setup, arg, sizeof(setup)))
+ return -EFAULT;
+
+ if (!setup.name[0])
+ return -EINVAL;
+
+ dev = udev->dev;
+ dev->id = setup.id;
+ udev->ff_effects_max = setup.ff_effects_max;
+
+ kfree(dev->name);
+ dev->name = kstrndup(setup.name, UINPUT_MAX_NAME_SIZE, GFP_KERNEL);
+ if (!dev->name)
+ return -ENOMEM;
+
+ retval = uinput_validate_absbits(dev);
+ if (retval < 0)
+ return retval;
+
+ udev->state = UIST_SETUP_COMPLETE;
+ return 0;
+}
+
+static int uinput_abs_setup(struct uinput_device *udev,
+ struct uinput_setup __user *arg, size_t size)
+{
+ struct uinput_abs_setup setup = {};
+ struct input_dev *dev;
+
+ if (size > sizeof(setup))
+ return -E2BIG;
+
+ if (udev->state == UIST_CREATED)
+ return -EINVAL;
+
+ if (copy_from_user(&setup, arg, size))
+ return -EFAULT;
+
+ if (setup.code > ABS_MAX)
+ return -ERANGE;
+
+ dev = udev->dev;
+
+ input_alloc_absinfo(dev);
+ if (!dev->absinfo)
+ return -ENOMEM;
+
+ set_bit(setup.code, dev->absbit);
+ dev->absinfo[setup.code] = setup.absinfo;
+
+ /*
+ * We restore the state to UIST_NEW_DEVICE because the user has to call
+ * UI_DEV_SETUP in the last place before UI_DEV_CREATE to check the
+ * validity of the absbits.
+ */
+ udev->state = UIST_NEW_DEVICE;
+ return 0;
+}
+
+/* legacy setup via write() */
+static int uinput_setup_device_legacy(struct uinput_device *udev,
+ const char __user *buffer, size_t count)
{
struct uinput_user_dev *user_dev;
struct input_dev *dev;
retval = udev->state == UIST_CREATED ?
uinput_inject_events(udev, buffer, count) :
- uinput_setup_device(udev, buffer, count);
+ uinput_setup_device_legacy(udev, buffer, count);
mutex_unlock(&udev->mutex);
uinput_destroy_device(udev);
goto out;
+ case UI_DEV_SETUP:
+ retval = uinput_dev_setup(udev, p);
+ goto out;
+
+ /* UI_ABS_SETUP is handled in the variable size ioctls */
+
case UI_SET_EVBIT:
retval = uinput_set_bit(arg, evbit, EV_MAX);
goto out;
name = dev_name(&udev->dev->dev);
retval = uinput_str_to_user(p, name, size);
goto out;
+
+ case UI_ABS_SETUP & ~IOCSIZE_MASK:
+ retval = uinput_abs_setup(udev, p, size);
+ goto out;
}
retval = -EINVAL;
* Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
*
* Changes/Revisions:
+ * 0.5 08/13/2015 (David Herrmann <dh.herrmann@gmail.com> &
+ * Benjamin Tissoires <benjamin.tissoires@redhat.com>)
+ * - add UI_DEV_SETUP ioctl
+ * - add UI_ABS_SETUP ioctl
+ * - add UI_GET_VERSION ioctl
* 0.4 01/09/2014 (Benjamin Tissoires <benjamin.tissoires@redhat.com>)
* - add UI_GET_SYSNAME ioctl
* 0.3 24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>)
#include <linux/types.h>
#include <linux/input.h>
-#define UINPUT_VERSION 4
-
+#define UINPUT_VERSION 5
+#define UINPUT_MAX_NAME_SIZE 80
struct uinput_ff_upload {
__u32 request_id;
#define UI_DEV_CREATE _IO(UINPUT_IOCTL_BASE, 1)
#define UI_DEV_DESTROY _IO(UINPUT_IOCTL_BASE, 2)
+struct uinput_setup {
+ struct input_id id;
+ char name[UINPUT_MAX_NAME_SIZE];
+ __u32 ff_effects_max;
+};
+
+/**
+ * UI_DEV_SETUP - Set device parameters for setup
+ *
+ * This ioctl sets parameters for the input device to be created. It must be
+ * issued *before* calling UI_DEV_CREATE or it will fail. This ioctl supersedes
+ * the old "struct uinput_user_dev" method, which wrote this data via write().
+ * To actually set the absolute axes, you also need to call the ioctl
+ * UI_ABS_SETUP *before* calling this ioctl.
+ *
+ * This ioctl takes a "struct uinput_setup" object as argument. The fields of
+ * this object are as follows:
+ * id: See the description of "struct input_id". This field is
+ * copied unchanged into the new device.
+ * name: This is used unchanged as name for the new device.
+ * ff_effects_max: This limits the maximum numbers of force-feedback effects.
+ * See below for a description of FF with uinput.
+ *
+ * This ioctl can be called multiple times and will overwrite previous values.
+ * If this ioctl fails with -EINVAL, you're recommended to use the old
+ * "uinput_user_dev" method via write() as fallback, in case you run on an old
+ * kernel that does not support this ioctl.
+ *
+ * This ioctl may fail with -EINVAL if it is not supported or if you passed
+ * incorrect values, -ENOMEM if the kernel runs out of memory or -EFAULT if the
+ * passed uinput_setup object cannot be read/written.
+ * If this call fails, partial data may have already been applied to the
+ * internal device.
+ */
+#define UI_DEV_SETUP _IOW(UINPUT_IOCTL_BASE, 3, struct uinput_setup)
+
+struct uinput_abs_setup {
+ __u16 code; /* axis code */
+ /* __u16 filler; */
+ struct input_absinfo absinfo;
+};
+
+/**
+ * UI_ABS_SETUP - Set absolute axis information for the device to setup
+ *
+ * This ioctl sets one absolute axis information for the input device to be
+ * created. It must be issued *before* calling UI_DEV_SETUP and UI_DEV_CREATE
+ * for every absolute axis the device exports.
+ * This ioctl supersedes the old "struct uinput_user_dev" method, which wrote
+ * part of this data and the content of UI_DEV_SETUP via write().
+ *
+ * This ioctl takes a "struct uinput_abs_setup" object as argument. The fields
+ * of this object are as follows:
+ * code: The corresponding input code associated with this axis
+ * (ABS_X, ABS_Y, etc...)
+ * absinfo: See "struct input_absinfo" for a description of this field.
+ * This field is copied unchanged into the kernel for the
+ * specified axis. If the axis is not enabled via
+ * UI_SET_ABSBIT, this ioctl will enable it.
+ *
+ * This ioctl can be called multiple times and will overwrite previous values.
+ * If this ioctl fails with -EINVAL, you're recommended to use the old
+ * "uinput_user_dev" method via write() as fallback, in case you run on an old
+ * kernel that does not support this ioctl.
+ *
+ * This ioctl may fail with -EINVAL if it is not supported or if you passed
+ * incorrect values, -ENOMEM if the kernel runs out of memory or -EFAULT if the
+ * passed uinput_setup object cannot be read/written.
+ * If this call fails, partial data may have already been applied to the
+ * internal device.
+ */
+#define UI_ABS_SETUP _IOW(UINPUT_IOCTL_BASE, 4, struct uinput_abs_setup)
+
#define UI_SET_EVBIT _IOW(UINPUT_IOCTL_BASE, 100, int)
#define UI_SET_KEYBIT _IOW(UINPUT_IOCTL_BASE, 101, int)
#define UI_SET_RELBIT _IOW(UINPUT_IOCTL_BASE, 102, int)
#define UI_FF_UPLOAD 1
#define UI_FF_ERASE 2
-#define UINPUT_MAX_NAME_SIZE 80
struct uinput_user_dev {
char name[UINPUT_MAX_NAME_SIZE];
struct input_id id;
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