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* Keystroke.c: move some vars to inner scopeUlrich Sibiller2017-04-031-5/+2
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* Init keystrokes at startup and reconnectUlrich Sibiller2017-04-034-9/+12
| | | | no more late initialization
* Keystroke.c: avoid use of comparisons on "False"Ulrich Sibiller2017-04-031-21/+13
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* Keystroke.c: use Booleans where appropriateUlrich Sibiller2017-04-031-13/+13
| | | | | Some of the keystroke checks have used them before. This commit unifies those checks.
* Keystroke.h: improve parse_keystroke_file()Ulrich Sibiller2017-04-031-35/+44
| | | | Print out more/better messages.
* Keystroke.c: introduce nxagentDumpKeystrokes()Ulrich Sibiller2017-04-032-0/+35
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* Keystroke.c/h: completely disable keystrokes that are not active at compile timeUlrich Sibiller2017-04-032-10/+27
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* Keystroke.h: auto-enum keystrokesUlrich Sibiller2017-04-031-26/+25
| | | | there's no need to define the values ourselves
* Keystroke.h/Keyboard.h: cleanup mask variablesUlrich Sibiller2017-04-032-2/+3
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* Keystroke.c: detect duplicate keystroke definitionsUlrich Sibiller2017-04-031-0/+23
| | | | | | We cannot check if an action is defined twice because the viewport stuff is controlled by multiple keystrokes (arrow keys and keypad) in the default configuration.
* Keystroke.c: use KEYSTROKE_NOTHINGUlrich Sibiller2017-04-031-3/+3
| | | | | instead of KEYSTROKE_END_MARKER. This is cleaner since KEYSTROKE_END_MARKER really marks the end of the list.
* Args.c: add two missing options to help messageUlrich Sibiller2017-04-031-0/+2
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* xinerama: Swap the response in RRXineramaWriteMonitorMichal Srb2017-04-031-0/+7
| | | | | | | | | | | | | | Backported from X.org: commit c96c860b6420adf0d004707a323af30491a1d7d3 Author: Michal Srb <msrb@suse.com> Date: Mon Dec 12 17:45:22 2016 +0200 xinerama: Swap the response in RRXineramaWriteMonitor Reviewed-by: Adam Jackson <ajax@redhat.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* regression fix for 52872a0: Keep index parameter in AddScreen() for now. ↵Mike Gabriel2017-03-271-2/+3
| | | | Requires proper ABI backport. (was: copy+paste error).
* _XDefaultError: set XlibDisplayIOError flag before calling exitArthur Huillet2017-03-261-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | _XReply isn't reentrant, and it can lead to deadlocks when the default error handler is called: _XDefaultError calls exit(1). It is called indirectly by _XReply when a X protocol error comes in that isn't filtered/handled by an extension or the application. This means that if the application (or one of its loaded shared libraries such as the NVIDIA OpenGL driver) has registered any _fini destructor, _fini will get called while still on the call stack of _XReply. If the destructor interacts with the X server and calls _XReply, it will hit a deadlock, looping on the following in _XReply: ConditionWait(dpy, dpy->xcb->reply_notify); It is legal for an application to make Xlib calls during _fini, and that is useful for an OpenGL driver to avoid resource leaks on the X server side, for example in the dlopen/dlclose case. However, the driver can not readily tell whether its _fini is being called because Xlib called exit, or for another reason (dlclose), so it is hard to cleanly work around this issue in the driver. This change makes it so _XReply effectively becomes a no-op when called after _XDefaultError was called, as though an XIOError had happened. The dpy connection isn't broken at that point, but any call to _XReply is going to hang. This is a bit of a kludge, because the more correct solution would be to make _XReply reentrant, maybe by broadcasting the reply_notify condition before calling the default error handler. However, such a change would carry a grater risk of introducing regressions in Xlib. This change will drop some valid requests on the floor, but this should not matter, as it will only do so in the case where the application is dying: X will clean up after it once exit() is done running. There is the case of XSetCloseDownMode(RETAIN_PERMANENT), but an application using that and wishing to clean up resources in _fini would currently be hitting a deadlock, which is hardly a better situation. Signed-off-by: Aaron Plattner <aplattner@nvidia.com> Reviewed-by: Jamey Sharp <jamey@minilop.net>
* Fix wrong Xfree in XListFonts failure pathJulien Cristau2017-03-261-2/+4
| | | | | | | | | | | | 'ch' gets moved inside the allocated buffer as we're looping through fonts, so keep a reference to the start of the buffer so we can pass that to Xfree in the failure case. Fixes: commit 20a3f99eba5001925b8b313da3accb7900eb1927 "Plug a memory leak" Signed-off-by: Julien Cristau <jcristau@debian.org> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
* dix: Remove insane BC hacksMike Gabriel2017-03-241-12/+1
| | | | | | | | | | | | | commit 6b5206e7cb8e5279816b48f014d47d3f03f16972 Author: Daniel Stone <daniel@fooishbar.org> Date: Fri Jul 18 15:38:10 2008 +0300 dix: Remove insane BC hacks If your DDX needs a 1bpp mode and doesn't set it up, your DDX is incompetent. Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Move AddScreen() comment where it actually belongs. Should be done in X.org, ↵Mike Gabriel2017-03-241-0/+7
| | | | too.
* dix: Move AddScreen() over into dispatch.c and introduce init_screen()Mike Gabriel2017-03-242-215/+214
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Partially pruned out of X.org commits: commit 987579c930bda803427a28cb82773c389f5110d6 Author: Peter Hutterer <peter.hutterer@who-t.net> Date: Wed Apr 22 13:26:40 2009 +1000 dix: remove all but main() from main.c All other functions are pushed into where they seemed to fit. main.c is now linked separately into libmain.a and linked in by the various DDXs. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> commit 3478af3374abffa0c226ee077fda1fcfc0751e74 Author: Dave Airlie <airlied@redhat.com> Date: Tue Jun 5 17:01:21 2012 +0100 screen: split out screen init code. (v2) This is a precursor for reusing this code to init gpu screens. v2: fixup int check as per Keith's review. Reviewed-by: Keith Packard <keithp@keithp.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Remove the useless -x optionAdam Jackson2017-03-212-13/+0
| | | | | | | | | | commit cbb165ab88cb0810268001e84d87671440baf837 Author: Adam Jackson <ajax@redhat.com> Date: Fri Apr 3 18:34:45 2009 -0400 os: Remove the useless -x option Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: FatalError if -displayfd writes fail AND Clear the -displayfd option ↵Keith Packard2017-03-211-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | after closing the file commit d72f691c0c9cace857975a6608a4cb431c8b6846 Author: Keith Packard <keithp@keithp.com> Date: Fri Apr 18 15:00:30 2014 -0700 os: FatalError if -displayfd writes fail When the server is started with the -displayfd option, check to make sure that the writes succeed and give up running if they don't. Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Jamey Sharp <jamey@minilop.net> commit 4957e986841225e9984daca76f1a0ee08df125bb Author: Keith Packard <keithp@keithp.com> Date: Fri Apr 18 15:00:35 2014 -0700 os: Clear the -displayfd option after closing the file Failing to clear this means that we'll attempt to write the display number to a random file descriptor on subsequent X server generations. Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Jamey Sharp <jamey@minilop.net> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Use unique logfile names when starting server with -displayfdAlan Coopersmith2017-03-213-29/+100
| | | | | | | | | | | | | | | | | | | | commit edcb6426f20c3be5dd5f50b76a686754aef2f64e Author: Alan Coopersmith <alan.coopersmith@oracle.com> Date: Fri Jan 1 18:11:14 2016 -0800 Use unique logfile names when starting server with -displayfd Fixes https://bugs.freedesktop.org/show_bug.cgi?id=93212 Previously all X servers started with -displayfd would overwrite Xorg.0.log - now a temporary name of Xorg.pid-<pid>.log is used until after -displayfd finds an open display - then it is renamed to the traditional Xorg.<display>.log name. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: -displayfd should check ports up to 65535Jon TURNEY2017-03-211-1/+1
| | | | | | | | | | | | | | | | | | commit ea5b2b0a2e2143ad1414fcbdc081b5d584588346 Author: Jon TURNEY <jon.turney@dronecode.org.uk> Date: Tue Oct 21 15:03:55 2014 +0100 os: -displayfd should check ports up to 65535 -displayfd should check ports up to 65535 Noticed during https://cygwin.com/ml/cygwin-xfree/2014-07/msg00024.html Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk> Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Use NotifyFd interface for listen descriptorsKeith Packard2017-03-213-74/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bundle X.org backport of these commits: commit 7ea64fb4374504bd3d524fc08c90efdab9f253ea Author: Alan Coopersmith <alan.coopersmith@oracle.com> Date: Mon Mar 9 09:55:57 2015 -0700 Clear ListenTransConns entries in CloseWellKnownConnections Since _XSERVTransClose frees the connection pointer passed to it, remove that pointer from the array, so we don't try to double free it if we come back into CloseWellKnownConnections again. Should fix https://bugzilla.yoctoproject.org/show_bug.cgi?id=6665 in which the shutdown section of the main() loop called CloseWellKnownConnections() and then moved on to ddxGiveUp(), which failed to release the VT and thus called AbortServer(), which called CloseWellKnownConnections() again. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> commit 7b02f0b87ec2fa0cc5a65307a1fd55c671cec884 Author: Keith Packard <keithp@keithp.com> Date: Wed Nov 11 22:02:17 2015 -0800 os: Use NotifyFd interface for listen descriptors Replace the custom path for dealing with new incoming connections with the general-purpose NotifyFd API. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com> commit ba71b69f94f00a6f6910597185610668e79c10be Author: Alan Coopersmith <alan.coopersmith@oracle.com> Date: Fri Jan 1 17:34:41 2016 -0800 Avoid segfault in CloseWellKnownConnections when using -displayfd When -displayfd is looping through the possible display ids to use, if it can't open all the listening sockets for one (say when :0 is already in use), it calls CloseWellKnownConnections to close all the ListenTransConns entries before the point that ListenTransFds was allocated & initialized, so CloseWellKnownConnections would segfault trying to read entries from a NULL ListenTransFds pointer. Introduced by commit 7b02f0b8 Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Handle -displayfd and an explicit display number sensiblyJon TURNEY2017-03-214-8/+9
| | | | | | | | | | | | | | | | | | | commit bc348bd2c42f3f18786085ccef2f010eff5bf3d2 Author: Jon TURNEY <jon.turney@dronecode.org.uk> Date: Mon Mar 11 14:34:32 2013 +0000 Handle -displayfd and an explicit display number sensibly Handle -displayfd and an explicit display number sensibly, e.g. use the explicitly specified display number, and write it to the displayfd v2: displayfd might be 0, so use -1 as invalid value v3: Rebase for addition of NoListenAll flag Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk> Reviewed-by: Kristian Høgsberg <krh@bitplanet.net> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Xserver/os/utils.c: Add NXAGENT_SERVER specific -nolisten parameter: ANY.Mike Gabriel2017-03-212-0/+6
| | | | This allows us to trigger the NoListenAll := TRUE code path in nxagent.
* os: Add a mechanism to prevent creating any listen socketsKristian Høgsberg2017-03-213-5/+9
| | | | | | | | | | | | | | | | | | | | | | commit 44fe1b8ea284df6bbaef67e246016d104665b2fe Author: Kristian Høgsberg <krh@bitplanet.net> Date: Wed Mar 19 14:03:13 2014 -0700 os: Add a mechanism to prevent creating any listen sockets A socket-activated server will receive its listening sockets from the parent process and should not create its own sockets. This patch introduces a NoListen flag that can be set by a DDX to prevent the server from creating the sockets. When NoListen is enabled, we also disable the server lock checking, since the parent process is responsible for checking the lock before picking the display name and creating the sockets. Signed-off-by: Kristian Høgsberg <krh@bitplanet.net> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Daniel Stone <daniel@fooishbar.org> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Add -displayfd optionChase Douglas2017-03-215-26/+69
| | | | | | | | | | | | | | | | | | | | | | | | | commit 88bacc49f06da5927f716869f5a32672a8297ed0 Author: Chase Douglas <chase.douglas@canonical.com> Date: Wed Apr 4 15:29:42 2012 -0700 os: Add -displayfd option This option specifies a file descriptor in the launching process. X will scan for an available display number and write that number back to the launching process, at the same time as SIGUSR1 generation. This means display managers don't need to guess at available display numbers. As a consequence, if X fails to start when using -displayfd, it's not because the display was in use, so there's no point in retrying the X launch on a higher display number. Signed-off-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Chase Douglas <chase.douglas@canonical.com> Reviewed-by: Julien Cristau <jcristau@debian.org> Tested-by: Julien Cristau <jcristau@debian.org> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Use NotifyFd for ErrorConnMaxKeith Packard2017-03-212-18/+19
| | | | | | | | | | | | | | | | commit c3fea428aed919826130ef8ebdb2cceb445a845b Author: Keith Packard <keithp@keithp.com> Date: Tue May 24 20:51:31 2016 -0700 os: Use NotifyFd for ErrorConnMax 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> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Move SIGUSR1 notification as late as possible.Adam Jackson2017-03-213-38/+53
| | | | | | | | | | | | | | | | | | commit f01e149d1af14ef9ee0e8a6743ab6a08f3bb677c Author: Adam Jackson <ajax@redhat.com> Date: Thu Nov 1 15:41:11 2007 -0400 Move SIGUSR1 notification as late as possible. If we inherited a signal mask from the parent process that ignores SIGUSR1, then we will send SIGUSR1 to the parent to indicate when we're ready to accept connections. Unfortunately, we send this notification way too early, right after creating the sockets rather than just before entering the main loop. Move it to just before Dispatch() so we're not lying quite so much. Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* dix: Extend initial connection handshake for forwarding proxiesAdam Jackson2017-03-212-8/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | commit 78fa121f4097d29458e5453c13473595df06e26e Author: Adam Jackson <ajax@redhat.com> Date: Fri Jun 17 13:43:38 2011 -0400 dix: Extend initial connection handshake for forwarding proxies Forwarding proxies like sshd will appear to be local, even though they aren't really. This leads to weird behaviour for extensions that truly require running under the same OS services as the client, like MIT-SHM and DRI2. Add two new legal values for the initial connection's byteOrder field, 'r' and 'R'. These act like 'l' and 'B' respectively, but have the side effect of forcing the client to be treated as non-local. Forwarding proxies should attempt to munge the first packet of the connection accordingly; older servers will reject connections thusly munged, so the proxy should fall back to passthrough if the munged connection attempt fails. Reviewed-by: Daniel Stone <daniel@fooishbar.org> Signed-off-by: Adam Jackson <ajax@redhat.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* dix: Pull client-is-local flag up to the ClientRecAdam Jackson2017-03-216-14/+5
| | | | | | | | | | | | | | | Backported from X.org commit ff8e3ad8074cd2c8bed49b39c40c2b4892118270 Author: Adam Jackson <ajax@redhat.com> Date: Thu Sep 20 13:16:59 2012 -0400 dix: Pull client-is-local flag up to the ClientRec Reviewed-by: Daniel Stone <daniel@fooishbar.org> Signed-off-by: Adam Jackson <ajax@redhat.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: always check if client is local when connection is acceptedPauli Nieminen2017-03-213-3/+19
| | | | | | | | | | | | | | | | | | | Backported from X.org: commit 2d67ada3c4079a11c52024a9c3d4138becca5171 Author: Pauli Nieminen <ext-pauli.nieminen@nokia.com> Date: Thu Dec 30 19:19:43 2010 +0200 os: always check if client is local when connection is accepted LocalClient is used for all DRI2 requests that makes it frequently called function. Querying if connection is local or not takes 10-15us (on ARM) depending on malloc speed. Signed-off-by: Pauli Nieminen <ext-pauli.nieminen@nokia.com> Reviewed-by: Daniel Stone <daniel@fooishbar.org> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Add facilities for client ID tracking.Rami Ylimäki2017-03-218-0/+485
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 6d6d4cb6043905d850834946e9bfc526ed5a9ef7 Author: Matthieu Herrb <matthieu.herrb@laas.fr> Date: Mon Jan 2 13:23:59 2012 +0000 Add OpenBSD support to DetermineClientCmd() Uses kvm_getargv() from libkvm. Signed-off-by: Matthieu Herrb <matthieu.herrb@laas.fr> Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com> commit cfc4c3d7fa8bd4da4c08b2ab8e6f85435f75353a Author: Alan Coopersmith <alan.coopersmith@oracle.com> Date: Sat Dec 24 10:00:56 2011 -0800 Add Solaris support to DetermineClientCmd Uses /proc/pid/psinfo to read command & partial arguments. Moves cmdsize & argsize variables into non-Solaris #else clause to avoid unused variable warnings. Fixes format mismatch errors when building with DEBUG defined on a 64-bit platform (where Mask is defined as CARD32). Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Rami Ylimäki <rami.ylimaki@vincit.fi> Signed-off-by: Keith Packard <keithp@keithp.com> commit 780133f9ae7fada462714b47e79d26075bbd9abe Author: Alan Coopersmith <alan.coopersmith@oracle.com> Date: Fri Oct 28 21:29:50 2011 -0700 Convert DetermineClientCmd to use strdup instead of malloc+strncpy *cmdname is initialized to NULL earlier in the function, so it's okay to overwrite it with NULL if strdup fails, don't need that extra check. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com> commit 2ef4ff45ef1fcfc4967ebe3d550408769e5f6500 Author: Erkki Seppälä <erkki.seppala@vincit.fi> Date: Fri Mar 25 10:38:23 2011 +0200 os/client: Prevent rare fd leak in DetermineClientPid DetermineClientPid didn't close file descriptor if read on /proc/pid/cmdline failed. Adjusted the code to disregard the close return value and perform the return after that, if the read failed or returned EOF. Signed-off-by: Mark Kettenis <mark.kettenis@xs4all.nl> Signed-off-by: Erkki Seppälä <erkki.seppala@vincit.fi> Reviewed-by: Rami Ylimäki <rami.ylimaki@vincit.fi> Signed-off-by: Keith Packard <keithp@keithp.com> commit 1e933665bef26c74196bb7c59910e6a78bcacf0e Author: Rami Ylimäki <rami.ylimaki@vincit.fi> Date: Wed Dec 22 16:51:09 2010 +0200 os: Add facilities for client ID tracking. An interface is provided for figuring out the PID and process name of a client. Make some existing functionality from SELinux and IA extensions available for general use. Signed-off-by: Rami Ylimäki <rami.ylimaki@vincit.fi> Reviewed-by: Tiago Vignatti <tiago.vignatti@nokia.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* dix/os: backport various signal handling and smart scheduler changes from X.orgMike Gabriel2017-03-2113-152/+159
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Backported from X.org: commit 6178b1c91cfc9e860914acc6f0be2f2d2e07a124 Author: Adam Jackson <ajax@redhat.com> Date: Tue Jun 7 15:52:11 2016 -0400 dix: Use OsSignal() not signal() As the man page for the latter states: The effects of signal() in a multithreaded process are unspecified. We already have an interface to call sigaction() instead, use it. Signed-off-by: Adam Jackson <ajax@redhat.com> Reviewed-by: Keith Packard <keithp@keithp.com> commit e10ba9e4b52269b2ac75c4802dce4ca47d169657 Author: Keith Packard <keithp@keithp.com> Date: Wed Nov 11 22:02:01 2015 -0800 Remove non-smart scheduler. Don't require setitimer. This allows the server to call GetTimeInMillis() after each request is processed to avoid needing setitimer. -dumbSched now turns off the setitimer. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com> commit 1f915e8b524dd02011158aa038935970684c7630 Author: Daniel Drake <drake@endlessm.com> Date: Wed May 20 13:16:12 2015 -0600 Keep SIGALRM restart flag after Popen Commit 94ab7455 added SA_RESTART to the SIGALRM handler. However, the Popen code tears down and recreates the SIGALRM handler via OsSignal(), and this flag is dropped at this time. Clean the code to use just a single codepath for creating this signal handler, always applying SA_RESTART. [ajax: Fixed commit id] Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Daniel Drake <drake@endlessm.com> commit 94ab7455abc213fc96760e29ab2e943ec682fb22 Author: Daniel Drake <drake@endlessm.com> Date: Tue May 12 16:39:22 2015 -0600 Allow system call restarts upon signal interruption The X server frequently deals with SIGIO and SIGALRM interruptions. If process execution is inside certain blocking system calls when these signals arrive, e.g. with the kernel blocked on a contended semaphore, the system calls will be interrupted. Some system calls are automatically restartable (the kernel re-executes them with the same parameters once the signal handler returns) but only if the signal handler allows it. Set SA_RESTART on the signal handlers to enable this convenient behaviour. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Daniel Drake <drake@endlessm.com> commit a6c71ce5d2d2fe89e07a2ef5041c915acc3dc686 Author: Tiago Vignatti <tiago.vignatti@nokia.com> Date: Mon Mar 28 19:21:28 2011 +0300 os: fix memory and fd leaks in Popen Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Nicolas Peninguy <nico@lostgeeks.org> commit c9051b684b524549eab6d5b88ee3e195a6f6fbe8 Author: Alan Coopersmith <alan.coopersmith@sun.com> Date: Wed Nov 5 18:25:57 2008 -0800 Use OsSignal in Popen/Pclose to avoid SysV signal() stupidity commit 0e9ef65fa583bf2393dd0fda82df6f092387b425 Author: Keith Packard <keithp@koto.keithp.com> Date: Wed Nov 7 16:33:10 2007 -0800 Don't frob timers unless SmartSchedule is running commit 2338d5c9914e2a43c3a4f7ee0f4355ad0a1ad9e7 Author: Arjan van de Ven <arjan@linux.intel.com> Date: Sun Oct 28 09:37:52 2007 +0100 reduce wakeups from smart scheduler The smart scheduler itimer currently always fires after each request (which in turn causes the CPU to wake out of idle, burning precious power). Rather than doing this, just stop the timer before going into the select() portion of the WaitFor loop. It's a cheap system call, and it will only get called if there's no more commands batched up from the active fd. This change also allows some of the functions to be simplified; setitimer() will only fail if it's passed invalid data, and we don't do that... so make it void and remove all the conditional code that deals with failure. The change also allows us to remove a few variables that were used for housekeeping between the signal handler and the main loop. Signed-off-by: Keith Packard <keithp@koto.keithp.com> **Note**: The above change also required ABI changes in hw/nxagent/. commit abe0a51f3f790f8c055289465e130177c4b647cc Author: Ben Byer <bbyer@bbyer.apple.com> Date: Fri Sep 21 17:07:36 2007 -0700 So, like, checking return codes of system calls (signal, etc) is good. Also, only restore an old signal handler if one was actually set (prevents the server from dying on OS X). commit 6da39c67905500ab2db00a45cda4a9f756cdde96 Author: Eric Anholt <eric@anholt.net> Date: Wed Sep 12 13:23:13 2007 +0000 Fix build on FreeBSD after Popen changes. commit a5b8053606d6e786cdcf6734f271acc05f9cc588 Author: Adam Jackson <ajax@benzedrine.nwnk.net> Date: Tue Sep 11 11:37:06 2007 -0400 Ignore - not just block - SIGALRM around Popen()/Pclose(). Because our "popen" implementation uses stdio, and because nobody's stdio library is capable of surviving signals, we need to make absolutely sure that we hide the SIGALRM from the smart scheduler. Otherwise, when you open a menu in openoffice, and it recompiles XKB to deal with the accelerators, and you popen xkbcomp because we suck, then the scheduler will tell you you're taking forever doing something stupid, and the wait() code will get confused, and input will hang and your CPU usage slams to 100%. Down, not across. Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* dix/os: Merge priority computation into SmartScheduleClientKeith Packard2017-03-212-48/+18
| | | | | | | | | | | | | | | | | | | Backported from X.org: commit 7762a602c1dfdd8cfcf2b8c2281cf4d683d05216 Author: Keith Packard <keithp@keithp.com> Date: Thu May 19 15:05:55 2016 -0700 dix/os: Merge priority computation into SmartScheduleClient 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> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Fix a memory leakPauli Nieminen2017-03-211-4/+6
| | | | | | | | | | | | | | | | Backported from X.org (+ coding style fixes in other free() calls): commit 617b7d22115ccaaaa7ec69c99885054d33a3bc37 Author: Pauli Nieminen <ext-pauli.nieminen@nokia.com> Date: Thu Dec 30 19:19:42 2010 +0200 os: Fix a memory leak Signed-off-by: Pauli Nieminen <ext-pauli.nieminen@nokia.com> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Daniel Stone <daniel@fooishbar.org> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Rework local client id finding code to be more uniformAlan Coopersmith2017-03-214-69/+160
| | | | | | | | | | | | | | | | | | | | | Backport of X.org commit: commit 2d93e69690d2c5d4a89a795ede6423796528e5df Author: Alan Coopersmith <alan.coopersmith@sun.com> Date: Thu Sep 27 16:47:06 2007 -0700 Rework local client id finding code to be more uniform Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de> Note: This commit also switches client_uid_string's size from 32 to 64 chars, as found in this X.org commit (spotted by Mihai Moldovan during code review): commit a7b944f0d96c3e0e15e75378a04def1ac96089fb Author: Alan Coopersmith <alan.coopersmith@sun.com> Date: Wed Nov 1 16:17:49 2006 -0800 If getpeerucred() is available, include pid & zoneid in audit messages too
* AUDIT messages should contain uid for local accesses (X.org bug #1997)Alan Coopersmith2017-03-211-5/+16
| | | | | | | | | | commit fbfb35189ef6666707097704b43e052cb2f919ae Author: Alan Coopersmith <alan.coopersmith@sun.com> Date: Wed Nov 1 15:11:48 2006 -0800 Bug #1997: AUDIT messages should contain uid for local accesses <https://bugs.freedesktop.org/show_bug.cgi?id=1997>
* LBX clean-up: Drop forgotten passage in Xserver/os/connection.c.Mike Gabriel2017-03-211-4/+0
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* Xserver/os/: Drop not-used-anymore MNX_TCPCONN macro.Mike Gabriel2017-03-212-10/+9
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* Xserver/os/Imakefile: Introduce the NULL variable and line-wrap various ↵Mike Gabriel2017-03-211-32/+91
| | | | variable definitions for the sake of better readability.
* Don't crash on unconfigured interfaces. (X.org bug #5218, Andrei Barbu)Adam Jackson2017-03-201-0/+2
| | | | | | | | | | commit 9d62d1e6903ccc095f784279a699b3f40a8f0cf8 Author: Adam Jackson <ajax@nwnk.net> Date: Sat Jan 7 00:45:17 2006 +0000 Bug #5218: Don't crash on unconfigured interfaces. (Andrei Barbu) Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Set padding bytes to 0 in WriteToClientAlan Coopersmith2017-03-201-1/+5
| | | | | | | | | | | | | | | | | commit bed610fcae41ddfe21fa9acde599b17d1d15f5d1 Author: Alan Coopersmith <alan.coopersmith@oracle.com> Date: Mon Jul 9 19:12:44 2012 -0700 Set padding bytes to 0 in WriteToClient Clear them out when needed instead of leaving whatever values were present in previously sent messages. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Keith Packard <keithp@keithp.com> Tested-by: Daniel Stone <daniel@fooishbar.org> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Return BadLength instead of disconnecting BigReq clients (#4565)Aaron Plattner2017-03-202-3/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Backported from X.org: commit 67c66606c760c263d7a4c2d1bba43ed6225a4e7c Author: Robert Morell <rmorell@nvidia.com> Date: Thu May 9 13:09:02 2013 -0700 os: Reset input buffer's 'ignoreBytes' field If a client sends a request larger than maxBigRequestSize, the server is supposed to ignore it. Before commit cf88363d, the server would simply disconnect the client. After that commit, it attempts to gracefully ignore the request by remembering how long the client specified the request to be, and ignoring that many bytes. However, if a client sends a BigReq header with a large size and disconnects before actually sending the rest of the specified request, the server will reuse the ConnectionInput buffer without resetting the ignoreBytes field. This makes the server ignore new X clients' requests. This fixes that behavior by resetting the ignoreBytes field when putting the ConnectionInput buffer back on the FreeInputs list. Signed-off-by: Robert Morell <rmorell@nvidia.com> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> commit c80c41767eb101e9dbd8393d8cca7764b4e248a4 Author: Aaron Plattner <aplattner@nvidia.com> Date: Mon Oct 25 22:01:32 2010 -0700 os: Fix BigReq ignoring when another request is pending Commit cf88363db0ebb42df7cc286b85d30d7898aea840 fixed the handling of BigReq requests that are way too large and handles the case where the read() syscall returns a short read. However, it neglected to handle the case where it returns a long read, which happens when the client has another request in the queue after the bogus large one. Handle the long read case by subtracting the smaller of 'needed' and 'gotnow' from oci->ignoreBytes. If needed < gotnow, simply subtract the two, leaving gotnow equal to the number of extra bytes read. Since the code immediately following the (oci->ignoreBytes > 0) block tries to handle the next request, advance oci->bufptr immediately instead of setting oci->lenLastReq and letting the next call to ReadRequestFromClient do it. Fixes the XTS pChangeKeyboardMapping-3 test. CASES TESTS PASS UNSUP UNTST NOTIU WARN FIP FAIL UNRES UNIN ABORT -Xproto 122 389 367 2 19 0 0 0 1 0 0 0 +Xproto 122 389 368 2 19 0 0 0 0 0 0 0 Signed-off-by: Aaron Plattner <aplattner@nvidia.com> Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com> commit cf88363db0ebb42df7cc286b85d30d7898aea840 Author: Aaron Plattner <aplattner@nvidia.com> Date: Fri Aug 27 10:20:29 2010 -0700 os: Return BadLength instead of disconnecting BigReq clients (#4565) If a client sends a big request that's too big (i.e. bigger than maxBigRequestSize << 2 bytes), the server just disconnects it. This makes the client receive SIGPIPE the next time it tries to send something. The X Test Suite sends requests that are too big when the test specifies the TOO_LONG test type. When the client receives SIGPIPE, XTS marks it as UNRESOLVED, which counts as a failure. Instead, remember how long the request is supposed to be and then return that size. Dispatch() checks the length and sends BadLength to the client. Then, whenever oci->ignoreBytes is nonzero, ignore the data read instead of trying to process it as a request. Signed-off-by: Aaron Plattner <aplattner@nvidia.com> Reviewed-by: Keith Packard <keithp@keithp.com> Signed-off-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Fix overflow of ConnectionOutput->size and ->countPeter Harris2017-03-201-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | commit 4b0d0df34f10a88c10cb23dd50087b59f5c4fece Author: Peter Harris <pharris@opentext.com> Date: Mon Nov 17 14:31:24 2014 -0500 Fix overflow of ConnectionOutput->size and ->count When (long) is larger than (int), and when realloc succeeds with sizes larger than INT_MAX, ConnectionOutput->size and ConnectionOutput->count overflow and become negative. When ConnectionOutput->count is negative, InsertIOV does not actually insert an IOV, and FlushClient goes into an infinite loop of writev(fd, iov, 0) [an empty list]. Avoid this situation by killing the client when it has more than INT_MAX unread bytes of data. Signed-off-by: Peter Harris <pharris@opentext.com> Reviewed-by: Keith Packard <keithp@keithp.com> Signed-off-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* dix: Pass ClientPtr to FlushCallbackMichel Dänzer2017-03-202-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Backported X.org commits: commit b380f3ac51f40ffefcde7d3db5c4c149f274246d Author: Michel Dänzer <michel.daenzer@amd.com> Date: Tue Aug 2 17:53:01 2016 +0900 dix: Pass ClientPtr to FlushCallback This change has two effects: 1. Only calls FlushCallbacks when we're actually flushing data to a client. The unnecessary FlushCallback calls could cause significant performance degradation with compositing, which is significantly reduced even without any driver changes. 2. By passing the ClientPtr to FlushCallbacks, drivers can completely eliminate unnecessary flushing of GPU commands by keeping track of whether we're flushing any XDamageNotify events to the client for which the corresponding rendering commands haven't been flushed to the GPU yet. Reviewed-by: Adam Jackson <ajax@redha.com> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com> commit c65f610e12f9df168d5639534ed3c2bd40afffc8 Author: Kristian Høgsberg <krh@bitplanet.net> Date: Thu Jul 29 18:52:35 2010 -0400 Always call the flush callback chain when we flush client buffers We were missing the callback in a couple of places. Drivers may use the flush callback to submit batched up rendering before events (for example, damage events) are sent out, to ensure that the rendering has been queued when the client receives the event. Signed-off-by: Kristian Høgsberg <krh@bitplanet.net> Reviewed-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* Xserver/os/io.c: Bail out early from FlushClient if nothing needs to be written.Keith Packard2017-03-191-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Found in X.org commit: commit d5bf6f95f31037bd49b11348b500c3c13b7e0c99 Author: Keith Packard <keithp@keithp.com> Date: Thu Oct 4 14:42:37 2012 -0700 Fix FlushClient to write extraBuf when provided (regression fix) In commit: commit 092c57ab173c8b71056f6feb3b9d04d063a46579 Author: Adam Jackson <ajax@redhat.com> Date: Fri Jun 17 14:03:01 2011 -0400 os: Hide the Connection{In,Out}put implementation details Reviewed-by: Daniel Stone <daniel@fooishbar.org> Signed-off-by: Adam Jackson <ajax@redhat.com> the check for an empty output buffer was moved from one calling location into the FlushClient implementation itself. However, this neglected the possibility that additional data, in the form of 'extraBuf' would be passed to FlushClient from other code paths. If the output buffer happened to be empty at that time, the extra data would never be written to the client. This is fixed by checking the total data to be written, which includes both pending and extra data, instead of just the pending data. Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os: Immediately queue initial WriteToClientChris Wilson2017-03-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Backported from X.org: commit 9bf46610a9d20962854016032de4567974e87957 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Fri Jun 21 22:58:31 2013 +0100 os: Immediately queue initial WriteToClient If we immediately put the WriteToClient() buffer into the socket's write queue, not only do we benefit from sending the response back to client earlier, but we also avoid the overhead of copying the data into our own staging buffer and causing extra work in the next select(). The write is effectively free as typically we may only send one reply per client per select() call, so the cost of the FlushClient() is the same. shmget10: 26400 -> 110000 getimage10: 25000 -> 108000 shmget500: 3160 -> 13500 getimage500: 1000 -> 1010 The knock-on effect is that on a mostly idle composited desktop, the CPU overhead is dominated by the memmove in WriteToClient, which is in turn eliminated by this patch. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
* os/xdmcp: Remove dead 'restart' codeMike Gabriel2017-03-191-10/+0
| | | | | | | | | | | | | | | | | | | | | | | | Completing the below X.org commit: commit a3a40291330bad10401fe2bcdbc097ce742b026a Author: Keith Packard <keithp@keithp.com> Date: Mon Sep 21 07:16:16 2015 +0100 os/xdmcp: Remove dead 'restart' code The X server used to wait for the user to hit a key or move the mouse before restarting the session after a keepalive failure. This, presumably, was to avoid having the X server continuously spew XDMCP protocol on the network while the XDM server was dead. Switching into this state was removed from the server some time before XFree86 4.3.99.16, so the remaining bits of code have been dead for over a decade, and no-one ever noticed. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
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