selftests: kcmp: Fix incorrect kernel headers search path

Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents
building against kernel headers from the build environment in scenario

selftests: kcmp: Fix incorrect kernel headers search path

Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents
building against kernel headers from the build environment in scenarios
where kernel headers are installed into a specific output directory
(O=...).

Signed-off-by: Mathieu Desnoyers <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: [email protected]
Cc: Ingo Molnar <[email protected]>
Cc: <[email protected]> # 5.18+
Signed-off-by: Shuah Khan <[email protected]>

show more ...

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

selftests: enable O and KBUILD_OUTPUT

Enable O and KBUILD_OUTPUT for kselftest. User could compile kselftest
to another directory by passing O or KBUILD_OUTPUT. And O is high
priority than KBUILD_OU

selftests: enable O and KBUILD_OUTPUT

Enable O and KBUILD_OUTPUT for kselftest. User could compile kselftest
to another directory by passing O or KBUILD_OUTPUT. And O is high
priority than KBUILD_OUTPUT.

Signed-off-by: Bamvor Jian Zhang <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

show more ...

selftests: add EXTRA_CLEAN for clean target

Some testcases need the clean extra data after running. This patch
introduce the "EXTRA_CLEAN" variable to address this requirement.

After KBUILD_OUTPUT

selftests: add EXTRA_CLEAN for clean target

Some testcases need the clean extra data after running. This patch
introduce the "EXTRA_CLEAN" variable to address this requirement.

After KBUILD_OUTPUT is enabled in later patch, it will be easy to
decide to if we need do the cleanup in the KBUILD_OUTPUT path(if the
testcase ran immediately after compiled).

Signed-off-by: Bamvor Jian Zhang <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

show more ...

selftests: remove duplicated all and clean target

Currently, kselftest use TEST_PROGS, TEST_PROGS_EXTENDED, TEST_FILES to
indicate the test program, extended test program and test files. It is
easy

selftests: remove duplicated all and clean target

Currently, kselftest use TEST_PROGS, TEST_PROGS_EXTENDED, TEST_FILES to
indicate the test program, extended test program and test files. It is
easy to understand the purpose of these files. But mix of compiled and
uncompiled files lead to duplicated "all" and "clean" targets.

In order to remove the duplicated targets, introduce TEST_GEN_PROGS,
TEST_GEN_PROGS_EXTENDED, TEST_GEN_FILES to indicate the compiled
objects.

Also, the later patch will make use of TEST_GEN_XXX to redirect these
files to output directory indicated by KBUILD_OUTPUT or O.

And add this changes to "Contributing new tests(details)" of
Documentation/kselftest.txt.

Signed-off-by: Bamvor Jian Zhang <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

show more ...

selftests: Set CC using CROSS_COMPILE once in lib.mk

This avoids repeating the logic in every Makefile. We mimic the
top-level Makefile and use $(CROSS_COMPILE)gcc.

Signed-off-by: Michael Ellerman

selftests: Set CC using CROSS_COMPILE once in lib.mk

This avoids repeating the logic in every Makefile. We mimic the
top-level Makefile and use $(CROSS_COMPILE)gcc.

Signed-off-by: Michael Ellerman <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

show more ...

selftests: Introduce minimal shared logic for running tests

This adds a Make include file which most selftests can then include to
get the run_tests logic.

On its own this has the advantage of some

selftests: Introduce minimal shared logic for running tests

This adds a Make include file which most selftests can then include to
get the run_tests logic.

On its own this has the advantage of some reduction in repetition, and
also means the pass/fail message is defined in fewer places.

However the key advantage is it will allow us to implement install very
simply in a subsequent patch.

The default implementation just executes each program in $(TEST_PROGS).

We use a variable to hold the default implementation of $(RUN_TESTS)
because that gives us a clean way to override it if necessary, ie. using
override. The mount, memory-hotplug and mqueue tests use that to provide
a different implementation.

Tests are not run via /bin/bash, so if they are scripts they must be
executable, we add a+x to several.

Signed-off-by: Michael Ellerman <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

show more ...

selftests/kcmp: Always try to build the test

Don't prevent the test building on non-x86. Just try and build it and
let the chips fall where they may.

Add support for CROSS_COMPILE while we're at it

selftests/kcmp: Always try to build the test

Don't prevent the test building on non-x86. Just try and build it and
let the chips fall where they may.

Add support for CROSS_COMPILE while we're at it. Also we don't need a
custom rule for building kcmp_test.

Signed-off-by: Michael Ellerman <[email protected]>
Reviewed-by: Christopher Covington <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

show more ...

selftests/kcmp: Don't include kernel headers

The kcmp test mucks with the include path to bring in the kernel
headers, and x86 headers too for reasons that are not clear.

Now that kcmp.h is exporte

selftests/kcmp: Don't include kernel headers

The kcmp test mucks with the include path to bring in the kernel
headers, and x86 headers too for reasons that are not clear.

Now that kcmp.h is exported none of that should be necessary.

Signed-off-by: Michael Ellerman <[email protected]>
Acked-by: Cyrill Gorcunov <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

show more ...

tools: selftests: fix build issue with make kselftests target

Fix the typo of ARCH when running 'make kselftests'. Change the 'X86'
to 'x86'. Test by compilation.

Signed-off-by: Phong Tran <tranm

tools: selftests: fix build issue with make kselftests target

Fix the typo of ARCH when running 'make kselftests'. Change the 'X86'
to 'x86'. Test by compilation.

Signed-off-by: Phong Tran <[email protected]>
Cc: David Herrmann <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Shuah Khan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

selftests: fix clean target in kcmp Makefile

Signed-off-by: Ramkumar Ramachandra <[email protected]>
Cc: Dave Young <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Sign

selftests: fix clean target in kcmp Makefile

Signed-off-by: Ramkumar Ramachandra <[email protected]>
Cc: Dave Young <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

kcmp selftests: print fail status instead of cause make error

In case kcmp_test exit non zero value it will cause make error.
Better way is just print the test failure status.

Signed-off-by: Dave Y

kcmp selftests: print fail status instead of cause make error

In case kcmp_test exit non zero value it will cause make error.
Better way is just print the test failure status.

Signed-off-by: Dave Young <[email protected]>
Reviewed-by: Pekka Enberg <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

kcmp selftests: make run_tests fix

make run_tests need the target is run_tests instead of run-tests
Also gcc output should be kcmp_test. Fix these two issues.

Signed-off-by: Dave Young <dyoung@redh

kcmp selftests: make run_tests fix

make run_tests need the target is run_tests instead of run-tests
Also gcc output should be kcmp_test. Fix these two issues.

Signed-off-by: Dave Young <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

syscalls, x86: add __NR_kcmp syscall

While doing the checkpoint-restore in the user space one need to determine
whether various kernel objects (like mm_struct-s of file_struct-s) are
shared between

syscalls, x86: add __NR_kcmp syscall

While doing the checkpoint-restore in the user space one need to determine
whether various kernel objects (like mm_struct-s of file_struct-s) are
shared between tasks and restore this state.

The 2nd step can be solved by using appropriate CLONE_ flags and the
unshare syscall, while there's currently no ways for solving the 1st one.

One of the ways for checking whether two tasks share e.g. mm_struct is to
provide some mm_struct ID of a task to its proc file, but showing such
info considered to be not that good for security reasons.

Thus after some debates we end up in conclusion that using that named
'comparison' syscall might be the best candidate. So here is it --
__NR_kcmp.

It takes up to 5 arguments - the pids of the two tasks (which
characteristics should be compared), the comparison type and (in case of
comparison of files) two file descriptors.

Lookups for pids are done in the caller's PID namespace only.

At moment only x86 is supported and tested.

[[email protected]: fix up selftests, warnings]
[[email protected]: include errno.h]
[[email protected]: tweak comment text]
Signed-off-by: Cyrill Gorcunov <[email protected]>
Acked-by: "Eric W. Biederman" <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Cc: Andrey Vagin <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Glauber Costa <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Matt Helsley <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Vasiliy Kulikov <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: [email protected]
Cc: Michal Marek <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...