When a triple fault happens in a test, no call trace nor panic
is displayed. Instead, the system reboots to the good kernel.
Since the good kernel may display a boot prompt that matches the
success string, ktest may think that the test succeeded, when it
did not.

Detecting triple faults is tricky because it is hard to generalize
what a reboot looks like. The best that we can come up with for now
is to examine the Linux banner. If we detect that the Linux banner
matches the test we want to test, then look to see if we hit another
Linux banner with a different kernel is booted. This can be assumed
to be a triple fault.

We can't just check for two Linux banners because things like
early printk may cause the Linux banner to be displayed twice. Checking
for different kernel versions should be the safe bet.

If this for some reason detects a false triple boot. A new ktest
config option is also created:

 DETECT_TRIPLE_FAULT

This can be set to 0 to disable this checking.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Different timeouts can cause the ktest monitor to break out of the
loop. It becomes annoying that one does not know the reason why
it exited the monitor loop. Display the cause of the reason why
the loop was exited.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

By ignoring the unset values of the minconfig in deciding
what to test in the config_bisect can cause the problem
config from being tested too.

Just do not test the configs that are set in the minconfig.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The command that is called that reboots the kernel may fail
but the return code is not passed back to the ktest.pl script.
This is because a ';' is used between the two commands and
if the second command fails, only the first command's return
code is returned. Using a '&&' between the two commands fixes
this.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Because in perl the array size returned by $#arr, is the last
index and not the actually size of the array, we end the config
bisect early, thinking there is only one config left when there
are in fact two. Thus the result has a 50% chance of picking
the correct config that caused the problem.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

There are cases where one ktest option may be used within another
ktest option. Allow them to be reused just like config variables
but there are evaluated at time of test not config processing time.

Thus having something like:

MAKE_CMD = make ARCH=${ARCH}

TEST_START
ARCH = powerpc

TEST_START
ARCH = arm

Will have the arch defined for each test iteration.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

I found that I constantly reuse information for each test case.
It would be nice to just define a variable to reuse.

For example I may have:

TEST_START
[...]
TEST = ssh root@mybox /path/to/my/script

TEST_START
[...]
TEST = ssh root@mybox /path/to/my/script

[etc]

The issue is, I may wont to change that script or one of the other
fields. Then I need to update each line individually.

With the addition of config variables (variables only used during parsing
the config) we can simplify the config files. These variables can
also be defined multiple times and each time the new value will
overwrite the old value.

The convention to use a config variable over a ktest option is to use :=
instead of =.

Now we could do:

USER := root
TARGET := mybox
TEST_SCRIPT := /path/to/my/script
TEST_CASE := ${USER}@${TARGET} ${TEST_SCRIPT}

TEST_START
[...]
TEST = ${TEST_CASE}

TEST_START
[...]
TEST = ${TEST_CASE}

[etc]

Now we just need to update the variables at the top.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The patches being checked may not leave the kernel in a state
that the next run will allow the new kernel to be copied to the
machine. Reboot to a known good kernel before continuing to the
next kernel to test.

Added option PATCHCHECK_SLEEP_TIME for the max time to sleep between
patchcheck reboots.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Reboot after each bisect run regardless if the bisect passed
or failed. The test may just be to boot the kernel and that kernel
may not have a way to copy the next kerne to it. Reboot to a known
good kernel after each bisect run.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

If the test failed due to timeout for boot, print a message saying
so. Otherwise the user will be confused to why their test just failed.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The command to run post install (for those that want initrds) was
broken. Instead of doing a substitution for the $KERNEL_VERSION
variable. It was replacing the entire command with nothing.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Currently, if a test causes constant output but never reaches a
boot prompt, or crashes, the test will never stop. Add STOP_TEST_AFTER
to create a variable that will stop (and fail) the test after it has run
for this amount of time. The default is 10 minutes. Setting this
variable to -1 will disable it.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Record the console of tests to both the console and the log.
Also, record the bug reports afte the test has completed.
Currently, if a kernel bug happens while running the userland
test, the test stops and will not record the kernel bug. This
makes it difficult to solve what happened.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The config STOP_AFTER_FAILURE is the number of seconds to continue
the test when a failure is detected. This lets the monitor record
more data to the logs and console that may be helpful in solving
the bug that was found.

But the test had a bug. If the failure caused multiple
"Call Trace" stack dumps, the start time to compare the
STOP_AFTER_FAILURE would constantly be reset. Only update the start
time at the first "Call Trace" instance.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Add the config option BISECT_FILES that allows the user to
specify what path in the kernel to run the git bisect on.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

If a during a git bisect, ktest fails on something other than
what it is testing (if BISECT_TYPE is test but it fails on build),
if BISECT_SKIP is set, then it will do a "git bisect skip" instead
of just failing the bisect and letting the user find a good commit
to test.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

For both git bisect and config bisect, if BISECT_MANUAL is set to 1,
then bisect will stop between iterations and ask the user for the
result. The actual result is ignored. This makes it possible to
use ktest.pl for bisecting configs and git and let the user examine
the results themselves and enter their own results.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

When bisecting, one may come across a kernel that does not have
make oldnoconfig. In this case, we need to run the command "yes"
into a make oldconfig. This will select defaults instead of 'n'
into each command, but it works as a work around.

Note, "yes n" will not work because a config may have a value that
"n" is not acceptable for.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Currently we just look for a Call Trace to start the time out
when to reboot the box. But if the kernel panics and does not
show a Call Trace, the test will not reboot the box after
the specified timeout.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

If the test fails and a logfile was specified. Print the name to
let the user know where to look for more information on the
failure.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

OK, the copyright allows you to write a copy, still I think the lawyers
prefer the correct spelling.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
LKML-Reference: <1295899921-11333-1-git-send-email-u.kleine-koenig@pengutronix.de>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

In keeping with the notion that all tools should be simple for
all to use. I've changed ktest.pl to ask for mandatory options
instead of just failing. It will append (or create) the options
the user types in, onto the config file.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

During the config_bisect, in case of failure, it is nice to have
the last good and bad .configs that were used. This would let
us restart the config_bisect from those configs.

Copy the last good config into the output dir as config_good,
and the last bad config as config_bad.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The run_ssh handles the ssh variable $SSH_COMMAND, which was not
being used by the run_command in reboot_to function.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Added the options STOP_AFTER_SUCCESS and STOP_AFTER_FAILURE to
allow the user to give a time (in seconds) to stop the monitor
after a stack trace or login has been detected. Sometimes the
kernel constantly prints out to the console and this may cause
the test to run indefinitely.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

When we store failures, we create a directory that has the build_type
in it. For useconfig, it also contains the name path of the config
file it uses. This unfortunately gets its own directory on failure.
Parse off the directory name when creating the directory to store
the failures.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

By using the "use_config" for minconfig and addconfig we risk
trying to copy itself to itself, which will cause an unexpected failure.

Use a different name instead.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Added the ability to do a config_bisect. It starts with a bad
config and does the following loop.

	Enable half the configs.
	if none of the configs to check are not enabled
	 (caused by missing dependencies) enable the other half.
	Run the test
	if the test passes, remove the configs from the check
	  but enabled them for further tests (to satisfy
	  dependencies).
	else
	  Remove any config that was not enabled, as we have found
	  a new config that can cause a failure.
	loop till we have only one config left.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Updated to version 0.2.

Now have SSH_EXEC options.

Also added some cleanups for keeping track of success and
reading the config file.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Have a easy way to parse the log file for success or failure.

 KTEST RESULT: ...
Suggested-by: NTim Bird <tim.bird@am.sony.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Allow a test case in the config file to undefine a default
value by specifying the option and equal sign but not assigning
it a value:

  OPTION =
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

To help prevent typos, use $output_config as the reference to
"$outputdir/.config".
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

If no LOG_FILE option is set, then write what would be logged to
that file to standard output.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Running the command "yes ''" through the make oldconfig may enable
things we do not want enabled. If something is default enabled, the
yes command with '' as an argument will enable it.

Use oldnoconfig, which runs everything as if 'no' was used.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Change the config to use TEST_START where the options after a
TEST_START automatically get the [] as it is read and they do
not need to exist in the config file;

TEST_START
MIN_CONFIG = myconfig

is the same as

MIN_CONFIG[1] = myconfig

The benefit is that you no longer need to keep track of test numbers
with tests.

Also process the commit ids that are passed to the options
to get the actually SHA1 so it is no longer relative to the branch.
Ie, saying HEAD will get the current SHA1 and then that will
be used, and will work even if another branch is checked out.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Added the options POWEROFF_AFTER_HALT to handle boxes that do not
really shut off after a halt is called.

Added POWERCYCLE_AFTER_REBOOT to force a power cycle for boxes that
don't reboot but get stuck during the reboot.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Add a POST_INSTALL option that runs after the build and install
but before rebooting to the test kernel. This alls the user to
run a script that will install an initrd (or anything else that may
be special) before booting.

An environment variable KERNEL_VERSION is set.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Added sample.conf as a nice document to show new users.

Use a %default hash to separate out the options that are default
and allow us to complain about options being set twice.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

It is much better to keep the monitor running throughout a
test than to constantly start and stop it. Some console readers
will show everything that has happened before when opening the
console, and by opening it several times, causes the old content to
be read multiple times in a single test.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Add option to continue after a test fails.

Add option to reset the log at start of running ktest.

Update default timeout to 2 minutes.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>