linux-toradex.git/include/uapi/linux/uinput.h, branch v4.6-rc6

Input: uinput - rework ABS validation

2015-12-19T01:48:51+00:00

Rework the uinput ABS validation to check passed absinfo data immediately,
but do ABS initialization as last step in UI_DEV_CREATE. The behavior
observed by user-space is not changed, as ABS initialization was never
checked for errors.

With this in place, the order of device initialization and abs
configuration is no longer fixed. Userspace can initialize the device and
afterwards set absinfo just fine.

Signed-off-by: David Herrmann 
Reviewed-by: Benjamin Tissoires 
Tested-by: Benjamin Tissoires 
Signed-off-by: Dmitry Torokhov

Input: uinput - add new UINPUT_DEV_SETUP and UI_ABS_SETUP ioctl

2015-12-19T01:48:50+00:00

This adds two new ioctls, UINPUT_DEV_SETUP and UI_ABS_SETUP, that replaces
the old device setup method (by write()'ing "struct uinput_user_dev" to the
node). The old method is not easily extendable and requires huge payloads.
Furthermore, overloading write() without properly versioned objects is
error-prone.

Therefore, we introduce two new ioctls to replace the old method.  These
ioctls support all features of the old method, plus a "resolution" field
for absinfo. Furthermore, it's properly forward-compatible to new ABS codes
and a growing "struct input_absinfo" structure.

UI_ABS_SETUP also allows user-space to skip unknown axes if not set.  There
is no need to copy the whole array temporarily into the kernel, but instead
the caller issues several ioctl where we copy each value manually.

Signed-off-by: David Herrmann 
Signed-off-by: Benjamin Tissoires 
Reviewed-by: David Herrmann 
Signed-off-by: Dmitry Torokhov

Input: uinput - fix ioctl nr overflow for UI_GET_SYSNAME/VERSION

2015-01-12T00:27:25+00:00

Request number for ioctls are encoded as 8bit numbers, but unfortunately
UI_GET_SYSNAME and UI_GET_VERSION specifu values larger than that, so they
get truncated to 44 (0x2c) and 45 (0x2d). This change makes requested
values match their effective values (the ABI stays intact).

Signed-off-by: Gabriel Laskar 
Signed-off-by: Dmitry Torokhov

Input: uinput - add UI_GET_VERSION ioctl

2014-07-21T21:30:42+00:00

This ioctl is the counterpart to EVIOCGVERSION and returns the
uinput-version the kernel was compiled with.

Reviewed-by: Peter Hutterer 
Signed-off-by: David Herrmann 
Signed-off-by: Dmitry Torokhov

Input: uinput - add UI_GET_SYSNAME ioctl to retrieve the sysfs path

2014-02-12T23:00:34+00:00

uinput is used in the xorg-integration-tests suite and in the wayland
test suite. These automated tests suites create many virtual input
devices and then hook something to read these newly created devices.

Currently, uinput does not provide the created input device, which means
that we rely on an heuristic to guess which input node was created.
The problem is that is heuristic is subjected to races between different
uinput devices or even with physical devices. Having a way to retrieve
the sysfs path allows us to find without any doubts the event node.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: David Herrmann 
Signed-off-by: Dmitry Torokhov

UAPI: (Scripted) Disintegrate include/linux

2012-10-13T09:46:48+00:00

Signed-off-by: David Howells 
Acked-by: Arnd Bergmann 
Acked-by: Thomas Gleixner 
Acked-by: Michael Kerrisk 
Acked-by: Paul E. McKenney 
Acked-by: Dave Jones