Cover the timens conversion in ntsync_schedule(): with a negative
CLOCK_MONOTONIC offset, a 100 ms absolute wait must not return
immediately against the host clock.

Suggested-by: Maoyi Xie <maoyixie.tju@gmail.com>
Signed-off-by: Iván Ezequiel Rodriguez <ivanrwcm25@gmail.com>
Reviewed-by: Elizabeth Figura <zfigura@codeweavers.com>
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://patch.msgid.link/20260723201301.11826-6-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Add coverage for documented EINVAL cases: zero owner on wait any/all,
non-zero pad, and objects from a different /dev/ntsync instance.

Signed-off-by: Iván Ezequiel Rodriguez <ivanrwcm25@gmail.com>
Reviewed-by: Elizabeth Figura <zfigura@codeweavers.com>
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://patch.msgid.link/20260723201301.11826-3-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

wake_all used EXPECT_EQ(0, objs[3]) after NTSYNC_IOC_CREATE_EVENT.
The ioctl returns a non-negative file descriptor on success; check
EXPECT_LE(0, objs[3]) like the other CREATE_* paths. The incorrect
expectation was noted on list (Mar 2025) but is still present in
mainline.

Signed-off-by: Iván Ezequiel Rodriguez <ivanrwcm25@gmail.com>
Reviewed-by: Elizabeth Figura <zfigura@codeweavers.com>
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://patch.msgid.link/20260723201301.11826-2-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The config fragment for these tests defines CONFIG_WINESYNC, which
refers to an earlier name for the ntsync driver before it was merged
[1]. Correct it to define CONFIG_NTSYNC instead.

[1] https://lore.kernel.org/all/f4cc1a38-1441-62f8-47e4-0c67f5ad1d43@codeweavers.com/

Fixes: 7f853a252cde ("selftests: ntsync: Add some tests for semaphore state.")
Cc: stable <stable@kernel.org>
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://patch.msgid.link/20260609175505.19632-1-enelsonmoore@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This follow-up patch completes centralization of kselftest.h and
ksefltest_harness.h includes in remaining seltests files, replacing all
relative paths with a non-relative paths using shared -I include path in
lib.mk

Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on
riscv, arm64, x86_64 and powerpc arch.

[reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h]
  Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com
Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com
Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Günther Noack <gnoack@google.com>
Cc: Jakub Kacinski <kuba@kernel.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mickael Salaun <mic@digikod.net>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Simon Horman <horms@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Test a more realistic usage pattern, and one with heavy contention, in order to
actually exercise ntsync's internal synchronization.

This test has several threads in a tight loop acquiring a mutex, modifying some
shared data, and then releasing the mutex. At the end we check if the data is
consistent.

Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://lore.kernel.org/r/20241213193511.457338-28-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Expand the alert tests to cover alerting a thread mid-wait, to test that the
relevant scheduling logic works correctly.

Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://lore.kernel.org/r/20241213193511.457338-27-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Test the "alert" functionality of NTSYNC_IOC_WAIT_ALL and NTSYNC_IOC_WAIT_ANY,
when a wait is woken with an alert and when it is woken by an object.

Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://lore.kernel.org/r/20241213193511.457338-26-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Expand the contended wait tests, which previously only covered events and
semaphores, to cover events as well.

Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://lore.kernel.org/r/20241213193511.457338-25-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Test event-specific ioctls NTSYNC_IOC_EVENT_SET, NTSYNC_IOC_EVENT_RESET,
NTSYNC_IOC_EVENT_PULSE, NTSYNC_IOC_EVENT_READ for auto-reset events, and
waiting on auto-reset events.

Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://lore.kernel.org/r/20241213193511.457338-24-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>