Sysctl test will fail in some items if the value of /proc/sys/kernel
/sysctrl_writes_strict is 0 as the default value in kernel older than v4.5.

Make this test more robus and compatible with older kernel by checking and
update writes_strict value and restore it when test is done.
Signed-off-by: Orson Zhai <orson.zhai@linaro.org>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
Tested-by: Sumit Semwal <sumit.semwal@linaro.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Do some minor adjustments after ReST conversion:

- On most documents, we use prepend a "$ " before
  command line arguments;

- Prefer to use :: on the preceding line;

- Split a multi-paragraph description as such.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

After commit a8ba798b ("selftests: enable O and KBUILD_OUTPUT"),
net selftest build fails because it points output file without $(OUTPUT)
yet.  This commit fixes the error.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Fixes: a8ba798b ("selftests: enable O and KBUILD_OUTPUT")
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Build of aperf fails as below:
```
gcc  -Wall -D_GNU_SOURCE   -lm  aperf.c  -o /tools/testing/selftests/intel_pstate/aperf
/tmp/ccKf3GF6.o: In function `main':
aperf.c:(.text+0x278): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
```

The faulure occurs because -lm was defined as LDFLAGS and implicit rule
of make places LDFLAGS before source file.  This commit fixes the
problem by using LDLIBS instead of LDFLAGS.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Selftest for memfd shows build error as below:
```
gcc -D_FILE_OFFSET_BITS=64 -I../../../../include/uapi/ -I../../../../include/ -I../../../../usr/include/    fuse_mnt.c  -o /home/sjpark/linux/tools/testing/selftests/memfd/fuse_mnt
/tmp/cc6NHdwJ.o: In function `main':
fuse_mnt.c:(.text+0x249): undefined reference to `fuse_main_real'
collect2: error: ld returned 1 exit status
```

The build fails because output file is specified without $(OUTPUT) and
LDFLAGS is used though Makefile implicit rule is used.  This commit
fixes the error by specifying output file path with $(OUTPUT) and using
LDLIBS instead of LDFLAGS.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

With older kernels, printf.sh and bitmap.sh fail because they can't find
the respective test modules they are looking for.

Use modprobe dry run to check for missing test_XXX module. Error out with
the same error code as prime_numbers.sh.
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Make membarrier test names more informative.
Signed-off-by: Alice Ferrazzi <alice.ferrazzi@gmail.com>
Signed-off-by: Paul Elder <paul.elder@pitt.edu>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Make the three tests that did use the old ksft_ext_skip()
(breakpoints/breakpoint_test_arm64, breakpoints/step_after_suspend_test,
and membarrier_test) use the new one, with an output for the
reason for skipping all the tests.
Signed-off-by: Paul Elder <paul.elder@pitt.edu>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Make ksft_exit_skip() input an optional message string as the reason
for skipping all the tests and outputs it prior to exiting.
Signed-off-by: Paul Elder <paul.elder@pitt.edu>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

1. Add the TAP13 header
2. remove variable data from the test description line
3. move the plan count to the end of the file, for consistency with
other kselftests
4. convert memory data from diagnostic (comment) format, to a YAML block
Signed-off-by: Tim Bird <tim.bird@sony.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Make the step_after_suspend test output in the TAP13 format by using the
TAP13 output functions defined in kselftest.h
Signed-off-by: Paul Elder <paul.elder@pitt.edu>
Signed-off-by: Alice Ferrazzi <alice.ferrazzi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Make the breakpoints test output in the TAP13 format by using the
TAP13 output functions defined in kselftest.h
Signed-off-by: Paul Elder <paul.elder@pitt.edu>
Signed-off-by: Alice Ferrazzi <alice.ferrazzi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Make the membarrier test output in the TAP13 format by using the
TAP13 output functions defined in kselftest.h
Signed-off-by: Paul Elder <paul.elder@pitt.edu>
Signed-off-by: Alice Ferrazzi <alice.ferrazzi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Add TAP13 conformat output functions to kselftest.h.

Also add exit functions that output TAP13 exiting text, as well as
functions to keep track of testing progress.
Signed-off-by: Paul Elder <paul.elder@pitt.edu>
Signed-off-by: Alice Ferrazzi <alice.ferrazzi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Do not confuse the compiler with a semicolon preceding a block. Replace
the semicolon with an empty block to avoid a warning:

  gcc -Wl,-no-as-needed -Wall -lpthread seccomp_bpf.c -o /.../linux/tools/testing/selftests/seccomp/seccomp_bpf
  In file included from seccomp_bpf.c:40:0:
  seccomp_bpf.c: In function ‘change_syscall’:
  ../kselftest_harness.h:558:2: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
    for (; _metadata->trigger;  _metadata->trigger = __bail(_assert))
    ^
  ../kselftest_harness.h:574:14: note: in expansion of macro ‘OPTIONAL_HANDLER’
   } while (0); OPTIONAL_HANDLER(_assert)
                ^~~~~~~~~~~~~~~~
  ../kselftest_harness.h:440:2: note: in expansion of macro ‘__EXPECT’
    __EXPECT(expected, seen, ==, 0)
    ^~~~~~~~
  seccomp_bpf.c:1313:2: note: in expansion of macro ‘EXPECT_EQ’
    EXPECT_EQ(0, ret);
    ^~~~~~~~~
  seccomp_bpf.c:1317:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’
    {
    ^
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Will Drewry <wad@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Add missing trailing slash to tools/testing/selftests to cover all files
and directories below. Add kselftest documentation files.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

There is a few more subdirectories needed in the git tree path for the
linux-kselftest url in order to be able to properly clone it.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Return unsupported if the kernel is too old to support
instance independent ftrace filter for some testcases.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Use top-level available_filter_function if the test case
is running under an instance.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Add instance test indication in test log too.
Current ftracetest shows instance test indication on
the list of test, but not in the log for each test.

This adds instance test indication on the top of
each log, like below;

execute (instance) : /ftrace/test.d/ftrace/func_set_ftrace_file.tc
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Since older kernel didn't support separated instance of
set_ftrace_filter, if the test case set the filter in
an instance, it will propagate to top-level instance.
This means that the filter setting remains even if we
remove the instance, and will cause other tests failure.
To avoid this issue, reset the ftrace filter if we
detect the propagation.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Check the kretprobe maxactive is supported by kprobe_events
interface. To ensure the kernel feature, this changes ftrace
README to describe it.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Current event/toplevel-enable.tc checking the trace
buffer by dumping all events while recording events.
However, this makes system very busy.

To reduce this overhead comes from reading trace buffer
and recording trace buffer, use head instead of cat
and stop tracing while reading.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Skip a part of ftrace filter test related to full-glob
matching if we are sure that the testing kernel is so old
that it does not support full-glob-matching yet.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Rebuild the seccomp tests when kselftest_harness.h is updated.
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Add ReST metadata to kselftest_harness.h to be able to include the
comments in the Sphinx documentation.
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Remove the TEST_API() wrapper to expose the underlying macro arguments
to the documentation tools.
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Include and convert kselftest to the Sphinx format.
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Move kselftest.txt to dev-tools/kselftest.rst .
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Keep the content consistent with the new name.
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

The seccomp/test_harness.h file contains useful helpers to build tests.
Moving it to the selftest directory should benefit to other test
components.

Keep seccomp maintainers for this file.
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Will Drewry <wad@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Shuah Khan <shuah@kernel.org>
Link: https://lkml.kernel.org/r/CAGXu5j+8CVz8vL51DRYXqOY=xc3zuKFf=PTENe88XYHzFYidUQ@mail.gmail.comSigned-off-by: Shuah Khan <shuahkh@osg.samsung.com>

The "Sync framework" test doesn't work if the kernel has no support,
obviously. Rather than reporting a failure, check for the kernel support
by looking for /sys/kernel/debug/sync/sw_sync, and if not found skip the
test.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Arm64 has 256TB address space so fix the test to pass on Arm as well.

Also remove unneeded numaif header.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

Most of the tests under selftests follow a pattern for their results,
which can then be parsed easily by other external tools easily. Though
futex tests do print the test results very well, it doesn't really
follow the general selftests pattern.

This patch makes necessary changes to fix that.

Output before this patch:
futex_requeue_pi: Test requeue functionality
        Arguments: broadcast=0 locked=0 owner=0 timeout=0ns
Result:  PASS

Output after this patch:
futex_requeue_pi: Test requeue functionality
        Arguments: broadcast=0 locked=0 owner=0 timeout=0ns
selftests: futex-requeue-pi [PASS]
Signed-off-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

This fixes a problem with reading files larger than 2GB from a UFS-2
file system:

    https://bugzilla.kernel.org/show_bug.cgi?id=195721

The incorrect UFS s_maxsize limit became a problem as of commit
c2a9737f ("vfs,mm: fix a dead loop in truncate_inode_pages_range()")
which started using s_maxbytes to avoid a page index overflow in
do_generic_file_read().

That caused files to be truncated on UFS-2 file systems because the
default maximum file size is 2GB (MAX_NON_LFS) and UFS didn't update it.

Here I simply increase the default to a common value used by other file
systems.
Signed-off-by: Richard Narron <comet.berkeley@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Will B <will.brokenbourgh2877@gmail.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: <stable@vger.kernel.org> # v4.9 and backports of c2a9737fSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull NFS client bugfixes from Trond Myklebust:
 "Bugfixes include:

   - Fix a typo in commit e0926934 ("NFS append COMMIT after
     synchronous COPY") that breaks copy offload

   - Fix the connect error propagation in xs_tcp_setup_socket()

   - Fix a lock leak in nfs40_walk_client_list

   - Verify that pNFS requests lie within the offset range of the layout
     segment"

* tag 'nfs-for-4.12-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: Mark unnecessarily extern functions as static
  SUNRPC: ensure correct error is reported by xs_tcp_setup_socket()
  NFSv4.0: Fix a lock leak in nfs40_walk_client_list
  pnfs: Fix the check for requests in range of layout segment
  xprtrdma: Delete an error message for a failed memory allocation in xprt_rdma_bc_setup()
  pNFS/flexfiles: missing error code in ff_layout_alloc_lseg()
  NFS fix COMMIT after COPY

Pull tty fix from Greg KH:
 "Here is a single tty core fix for 4.12-rc4. It reverts a patch that a
  lot of people reported as causing lockdep and other warnings.

  Right after I reverted this in my tree, it seems like another
  "correct" fix might have shown up, but it's too late in the release
  cycle to be messing with tty core locking, so let's just revert this
  for now to go back how things always have been and try it again for
  4.13.

  This has not been in linux-next as I only reverted it a few hours ago"

* tag 'tty-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "tty: fix port buffer locking"

Pull input subsystem fixes from Dmitry Torokhov:

 - a couple of regression fixes in synaptics and axp20x-pek drivers

 - try to ease transition from PS/2 to RMI for Synaptics touchpad users
   by ensuring we do not try to activate RMI mode when RMI SMBus support
   is not enabled, and nag users a bit to enable it

 - plus a couple of other changes that seemed worthwhile for this
   release

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: axp20x-pek - switch to acpi_dev_present and check for ACPI0011 too
  Input: axp20x-pek - only check for "INTCFD9" ACPI device on Cherry Trail
  Input: tm2-touchkey - use LEN_ON as boolean value instead of LED_FULL
  Input: synaptics - tell users to report when they should be using rmi-smbus
  Input: synaptics - warn the users when there is a better mode
  Input: synaptics - keep PS/2 around when RMI4_SMB is not enabled
  Input: synaptics - clear device info before filling in
  Input: silead - disable interrupt during suspend

Pull RTC fixlet from Alexandre Belloni:
 "A single patch, not really a fix but I don't think there is any reason
  to delay it.

  Change the mailing list address"

* tag 'rtc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  MAINTAINERS: update RTC mailing list