To validate the correct behavior of the TSD interfaces it's
important that we add a regression test. This test is designed
to minimally exercise the fundamental TSD behavior, it does not
attempt to validate all potential corner cases.
The test will first create 32 keys via tsd_create() and register
a common destructor. Next 16 wait threads will be created each
of which set/verify a random value for all 32 keys, then block
waiting to be released by the control thread. Meanwhile the
control thread verifies that none of the destructors have been
run prematurely.
The next phase of the test is to create 16 exit threads which
set/verify a random value for all 32 keys. They then immediately
exit. This is is designed to verify tsd_exit() which will be
called via thread_exit(). This must result in all registered
destructors being run and the memory for the tsd being free'd.
After this tsd_destroy() is verified by destroying all 32 keys.
Once again we must see the expected number of destructors run
and the tsd memory free'd. At this point the blocked threads
are released and they exit calling tsd_exit() which should do
very little since all the tsd has already been destroyed.
If this all goes off without a hitch the test passes. To ensure
no memory has been leaked, I have manually verified that after
spl module unload no memory is reported leaked.
The call to wake_up() must be moved under the spin lock because
once we drop the lock 'tp' may no longer be valid because the
creating thread has exited. This basic thread implementation
was correct, this was simply a flaw in the test case.
Updated AUTHORS, COPYING, DISCLAIMER, and INSTALL files. Added
standardized headers to all source file to clearly indicate the
copyright, license, and to give credit where credit is due.
- Proper ioctl() 32/64-bit binary compatibility. We need to ensure the
ioctl data itself is always packed the same for 32/64-bit binaries.
Additionally, the correct thing to do is encode this size in bytes
as part of the command using _IOC_SIZE().
- Minor formatting changes to respect the 80 character limit.
- Move all SPLAT_SUBSYSTEM_* defines in to splat-ctl.h.
- Increase SPLAT_SUBSYSTEM_UNKNOWN because we were getting close
to accidentally using it for a real registered subsystem.
