This call wasn't converted to 'input_unlock()' when the SIGIO code was
removed from the server, and so when the queue growing was reworked to
be done from the input thread, it got left sitting here. As the caller
now manages the lock, we don't need to switch this to input_unlock at
this point.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
This is a problem for the libinput driver that uses the same context across
multiple devices. The driver may be halfway through setting up an input device
(and the only way to do so is to add it to libinput) when the input thread
comes in an reads events. This then causes mayhem when data is dereferenced
that hasn't been set up yet.
In my case the cause was the call to libinput_path_remove_device() inside
preinit racing with evdev_dispatch_device() handling of ENODEV. The sequence
was:
- thread 2 gets an event and calls evdev_dispatch_device()
- thread 1 calls libinput_path_remove_device() which sets the device->source
to NULL
- thread 2 reads from the fd, gets ENODEV and now removes the device->source,
dereferencing the null-pointer
This is the one I could reproduce the most, but there are other potential
pitfalls that affect any driver that uses the same fd for multiple devices.
Avoid all this and wrap PreInit into the lock.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
If a device couldn't be enabled we left the lock hanging.
This patch also removes the leftover OsReleaseSignals() call, now unnecessary.
Note that input_unlock() is later than previously OsReleaseSignals().
RemoveDevice() manipulates the input device and its file descriptors, it's
safer to put the input_unlock() call after RemoveDevice() to avoid events
coming in while the device is being removed.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
Calling InputThreadRegisterDev twice with the same fd should replace
the existing function and args instead of creating a new entry with
the same fd.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
xf86AddEnabledDevice() prepends the new fd to the list,
xf86RemoveEnabledDevice() then searches for a matching fd and removes that
entry. If this is done for the same fd (and since we lose all information but
the actual fd) we usually unregister virtual devices in reverse order, causing
a dereference of already released memory.
Case in point:
- the wacom driver calls xf86AddEnabledDevice() once for the physical device,
then multiple times for the virtual subdevices
- when the physical device is unplugged, the driver calls
xf86RemoveEnabledDevice() for the physical device
- all we have is the fd, so we end up removing the last virtual device from
the fd set
- xf86DeleteInput() frees the physical device's pInfo
- the fd goes crazy with ENODEV, but a read_input() now passes the already
freed pInfo for the physical device
- boom
Fix this by appending to the fd list to provide bug-for-bug compatibility with
the old SIGIO code. This needs to be fixed in the driver, but meanwhile not
crashing the server provides for better user experience.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
Just use the RandR gamma ramp directly.
Fixes random on-monitor colours with drivers which don't call
xf86HandleColormaps, e.g. modesetting.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97154
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Embarassingly, it looks like I introduced this dead function in
commit 13c7d53df8 a year ago.
Nothing ever used it, not even then.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
From the Present extension specification:
An event context is associated with a specific window; using
an existing event context with a different window generates
a Match error.
If eventContext specifies an existing event context, then if
eventMask is empty, PresentSelectInput deletes the specified
context, otherwise the specified event context is changed to
select a different set of events.
If eventContext is an unused XID, then if eventMask is empty
no operation is performed. Otherwise, a new event context is
created selecting the specified events.
Without this change, there's no way for a client to explicitly change
or destroy an existing event mask entry. Trying to do so as specified
above would just result in a protocol error.
v2: (Keith Packard)
* Use dixLookupResourceByType instead of walking window_priv->events
* Return BadMatch if the existing event context is associated with a
different window or client
* Call LEGAL_NEW_RESOURCE again when creating a new event context
* Drop invalid "leak fix"
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
present_restore_screen_pixmap's work doesn't need to be done several
times for the same pending flip.
Fixes a crash if the X server quits while a flip is pending, in which
case present_set_abort_flip may be called several times, including when
screen->root is already cleared to NULL.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Instead of breaking the former when the driver supports the latter,
hook them up so that the hardware LUTs reflect the combination of the
current colourmap and gamma states. I.e. combine the colourmap, the
global gamma value/ramp and the RandR 1.2 per-CRTC gamma ramps into one
combined LUT per CRTC.
Fixes e.g. gamma sliders not working in games.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=27222
v2:
* Initialize palette_size and palette struct members, fixes crash on
server startup.
v3:
* Free randrp->palette in xf86RandR12CloseScreen, fixes memory leak.
v4:
* Call CMapUnwrapScreen if xf86RandR12InitGamma fails (Emil Velikov).
* Still allow xf86HandleColormaps to be called with a NULL loadPalette
parameter in the xf86_crtc_supports_gamma case.
v5:
* Clean up inner loops in xf86RandR12CrtcComputeGamma (Keith Packard)
* Move palette update out of per-CRTC loop in xf86RandR12LoadPalette
(Keith Packard)
v6:
* Handle reallocarray failure in xf86RandR12LoadPalette (Keith Packard)
Reviewed-by: Keith Packard <keithp@keithp.com>
This would normally return the same values the core RandR code passed to
xf86RandR12CrtcSetGamma before, which is rather pointless. The only
possible exception would be if a driver tried initializing
crtc->gamma_red/green/blue to reflect the hardware LUT state on startup,
but that can't work correctly if whatever set the LUT before the server
started was running at a different depth.
Even the pointless round-trip case will no longer work with the
following change.
Reviewed-by: Keith Packard <keithp@keithp.com>
RRCrtcGammaSetSize cannot be used yet in xf86InitialConfiguration,
because randr_crtc isn't allocated yet at that point, but a following
change will require RRCrtcGammaSetSize to be called from
xf86RandR12CrtcInitGamma.
v2:
* Bail from xf86RandR12CrtcInitGamma if !crtc->funcs->gamma_set (Keith
Packard)
Reviewed-by: Keith Packard <keithp@keithp.com>
Do all timer stuff before blocking, avoiding a bunch of duplicate code
and merge common code in WaitForSomething.
The WaitForSomething changes need a bit of explanation to show that
the new code is effectively equivalent to the old. Eliding error
checking and trivial bits we've got:
Before:
if (ready clients)
timeout = 0
else
compute timeout
i = poll
if (i <= 0) {
if (ready clients)
return TRUE;
if (input)
return FALSE;
if (any ready timers) {
run timers
return FALSE;
}
} else {
if (input)
return FALSE;
if (any ready timers) {
run timers
return FALSE;
}
if (ready clients)
return TRUE;
}
After:
if (ready clients)
timeout = 0;
else
compute timeout
run_timers
poll
if (input)
return FALSE;
if (ready clients)
return TRUE;
The old code would return TRUE if there were ready clients and input
pending. Dispatch would then schedule that ready client, but before
processing any requests, it would notice that there was input pending
and go process it. The new code just checks for input first, which is
effectively the same.
If the poll timed out and there weren't clients ready, then timers
would get run.
If the poll didn't time out, then timers would get run, even if there
were clients now ready. Now, if the timeout interval was zero, that
means that the timers must have been ready *before* poll was
invoked. In this case, we should simply run the timers before calling
poll -- no sense calling poll just to discard any data that it
generates.
If the timeout interval was non-zero, and poll didn't timeout, then
either there aren't any timers to run, or we got a surprise and hit a
timer exactly as a client became ready to run. This is the one case
where the new code is different from the old; the new code delays the
timer call until the next time WaitForSomething is called.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
No sense having an open-coded linked list here, plus the doubly linked
list is more efficient
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
poll provides per-fd notification of failure, so we don't need
CheckConnections anymore.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
There's no reason to close these now that we don't care what file
descriptors we use.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
There's no reason not to offer ridiculous numbers of clients; only a
few static data structures are arrays of this length.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
With no code depending on the range of file descriptors, checking
for that can be eliminated.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Replace use of select(2) to avoid fd limits. Note that
InputThreadFillPipe used select as well, but none of the files passed
were non-blocking, so there was no need for that code at all.
v2: Keep ospoll API usage single threaded to avoid re-entrancy issues
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Eliminates all of the fd_set mangling in the server main thread
v2: Listen for POLLOUT while writes are blocked.
v3: Only mark client not ready on EAGAIN return from read
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This converts the dispatch loop into using a list of ready clients
instead of an array. This changes the WaitForSomething API so that it
notifies DIX when a client becomes ready to read, instead of returning
the set of ready clients.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This provides a wrapper around poll or epoll providing a
callback-based interface for monitoring activity on a large set of
file descriptors.
v2: use xserver_poll API instead of poll. Don't use WSAPoll as
that is broken.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This uses the wrapper in case we need to emulate poll with select
as we do on Windows.
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
v2: rename as 'xserver_poll' to avoid potential library name
collisions. Provide 'xserver_poll.h' which uses the system
poll where available and falls back to this emulation otherwise.
Autodetects when this is required, building the emulation only
then
Source: https://github.com/bmc/poll
Signed-off-by: Adam Jackson <ajax@redhat.com>
Update for removal of fdset from Block/Wakeup handler API in 9d15912a
Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
Reviewed-by: Keith Packard <keithp@keithp.com>
Update for removal of AddEnabledDevice in be5a513f. Use SetNotifyFd instead.
Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
Reviewed-by: Keith Packard <keithp@keithp.com>
ATTR_KEY maps to ID_INPUT_KEY which is set for any device with keys.
ID_INPUT_KEYBOARD and thus ATTR_KEYBOARD is set for devices that are actual
keyboards (and have a set of expected keys).
Hand-written match rules may only apply ID_INPUT_KEYBOARD, so make sure we
match on that too.
Arguably we should've been matching on ATTR_KEYBOARD only all along but
changing that likely introduces regressions.
Reported-by: Marty Plummer <netz.kernel@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This error code can mean we're submitting more rects at once than the
driver can handle. If that happens, resubmit one at a time.
v2: Make the rect submit loop more error-proof (Walter Harms)
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Michael Thayer <michael.thayer@oracle.com>
The file descriptors passed to InputThreadFillPipe are always
blocking, so there's no need to use Select (or poll).
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This provides a way to report errors on file descriptors that is
better defined than "any bits which are not READ or WRITE".
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
The timeout resolution offered in the AdjustWaitForDelay call is
only milliseconds, so passing around the timeout as a pointer to a
struct timeval is not helpful. Doing everything in milliseconds up to
the point of the select call simplifies the code without affecting
functionality at all.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
The intermediate grabState, "GrabKickout", was used to trigger
dispatch into going back to WaitForSomething after doing a GrabServer
so that the set of ready clients would be recomputed to match what the
server should be processing. As we only process one client per
WaitForSomething call, we will always hit WaitForSomething after
finishing the current client, and so don't need any special case here.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Instead of having scheduling done in two places (one in
WaitForSomething, and the other in SmartScheduleClient), just stick
all of the scheduling in SmartScheduleClient.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
All uses of these interfaces should instead be using the NotifyFd API
instead.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This removes the last uses of fd_set from the server interfaces
outside of the OS layer itself.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
With no users of the interface needing the readmask anymore, we can
remove it from the argument passed to these functions.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Use SetNotifyFd instead, with the hope that someday someone will come
fix this to be more efficient -- right now, the wakeup handler is
doing the event reading, instead of the notify callback.
v2: no need to patch dmxsigio.c as it has been removed.
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This is a cleanup, proposed by Adam Jackson, but wasn't merged with
the original NotifyFD changes.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This is a cleanup, proposed by Adam Jackson, but wasn't merged with
the original NotifyFD changes.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Remove code in xf86Wakeup for dealing with other input and switch to
using the new NotifyFd interface.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Instead of open-coding a single FD wait, use NotifyFd to wait for the
FD to become readable before returning the error message.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This new libXfont API eliminates exposing internal X server symbols to
the font library, replacing those with a struct full of the entire API
needed to use that library.
v2: Use libXfont2 instead of libXfont_2
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
It is a modest performance improvement (2.7% on Intel), with the
significant downside that it keeps extra pixmap contents laying around
for 1000 BlockHandlers without the ability for the system to purge
them when under memory pressure, and tiled renderers don't know that
we could avoid reading their current contents when beginning to render
again. We could use the FB invalidate functions, but they aren't
always available, aren't hooked up well in Mesa, and would eat into
the performance gains of having the cache.
[ajax: rebased to master]
Reviewed-by: Adam Jackson <ajax@redhat.com>
Fixes incorrect clipping for redirected windows which don't happen to be
located at the top left corner of the screen.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96742
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
