event-mod.tc

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: event tracing - enable/disable with module event
# requires: set_event "Can enable module events via: :mod:":README
# flags: instance

rmmod trace-events-sample ||:
if ! modprobe trace-events-sample ; then
  echo "No trace-events sample module - please make CONFIG_SAMPLE_TRACE_EVENTS=m"
  exit_unresolved;
fi
trap "rmmod trace-events-sample" EXIT

# Set events for the module
echo ":mod:trace-events-sample" > set_event

test_all_enabled() {

	# Check if more than one is enabled
	grep -q sample-trace:foo_bar set_event
	grep -q sample-trace:foo_bar_with_cond set_event
	grep -q sample-trace:foo_bar_with_fn set_event

	# All of them should be enabled. Check via the enable file
	val=`cat events/sample-trace/enable`
	if [ $val -ne 1 ]; then
		exit_fail
	fi
}

clear_events() {
	echo > set_event
	val=`cat events/enable`
	if [ "$val" != "0" ]; then
		exit_fail
	fi
	count=`cat set_event | wc -l`
	if [ $count -ne 0 ]; then
		exit_fail
	fi
}

test_all_enabled

echo clear all events
echo 0 > events/enable

echo Confirm the events are disabled
val=`cat events/sample-trace/enable`
if [ $val -ne 0 ]; then
	exit_fail
fi

echo And the set_event file is empty

cnt=`wc -l set_event`
if [ $cnt -ne 0 ]; then
	exit_fail
fi

echo now enable all events
echo 1 > events/enable

echo Confirm the events are enabled again
val=`cat events/sample-trace/enable`
if [ $val -ne 1 ]; then
	exit_fail
fi

echo disable just the module events
echo '!:mod:trace-events-sample' >> set_event

echo Should have mix of events enabled
val=`cat events/enable`
if [ "$val" != "X" ]; then
	exit_fail
fi

echo Confirm the module events are disabled
val=`cat events/sample-trace/enable`
if [ $val -ne 0 ]; then
	exit_fail
fi

echo 0 > events/enable

echo now enable the system events
echo 'sample-trace:mod:trace-events-sample' > set_event

test_all_enabled

echo clear all events
echo 0 > events/enable

echo Confirm the events are disabled
val=`cat events/sample-trace/enable`
if [ $val -ne 0 ]; then
	exit_fail
fi

echo Test enabling foo_bar only
echo 'foo_bar:mod:trace-events-sample' > set_event

grep -q sample-trace:foo_bar set_event

echo make sure nothing is found besides foo_bar
if grep -q -v sample-trace:foo_bar set_event ; then
	exit_fail
fi

echo Append another using the system and event name
echo 'sample-trace:foo_bar_with_cond:mod:trace-events-sample' >> set_event

grep -q sample-trace:foo_bar set_event
grep -q sample-trace:foo_bar_with_cond set_event

count=`cat set_event | wc -l`

if [ $count -ne 2 ]; then
	exit_fail
fi

clear_events

rmmod trace-events-sample

echo ':mod:trace-events-sample' > set_event

echo make sure that the module shows up, and '-' is converted to '_'
grep -q '\*:\*:mod:trace_events_sample' set_event

modprobe trace-events-sample

test_all_enabled

clear_events

rmmod trace-events-sample

echo Enable just the system events
echo 'sample-trace:mod:trace-events-sample' > set_event
grep -q 'sample-trace:mod:trace_events_sample' set_event

modprobe trace-events-sample

test_all_enabled

clear_events

rmmod trace-events-sample

echo Enable event with just event name
echo 'foo_bar:mod:trace-events-sample' > set_event
grep -q 'foo_bar:mod:trace_events_sample' set_event

echo Enable another event with both system and event name
echo 'sample-trace:foo_bar_with_cond:mod:trace-events-sample' >> set_event
grep -q 'sample-trace:foo_bar_with_cond:mod:trace_events_sample' set_event
echo Make sure the other event was still there
grep -q 'foo_bar:mod:trace_events_sample' set_event

modprobe trace-events-sample

echo There should be no :mod: cached events
if grep -q ':mod:' set_event; then
	exit_fail
fi

echo two events should be enabled
count=`cat set_event | wc -l`
if [ $count -ne 2 ]; then
	exit_fail
fi

echo only two events should be enabled
val=`cat events/sample-trace/enable`
if [ "$val" != "X" ]; then
	exit_fail
fi

val=`cat events/sample-trace/foo_bar/enable`
if [ "$val" != "1" ]; then
	exit_fail
fi

val=`cat events/sample-trace/foo_bar_with_cond/enable`
if [ "$val" != "1" ]; then
	exit_fail
fi

clear_trace