ldt-test

#!/bin/bash

#
#	LDT - Linux Driver Template
#
#	Test script for driver LDT
#
#	Copyright (C) 2012 Constantine Shulyupin  http://www.makelinux.net/
#
#	Licensed under the GPLv2.
#

RED="\\033[0;31m"
NOCOLOR="\\033[0;39m"
GREEN="\\033[0;32m"

set -o errtrace
debugfs=`grep debugfs /proc/mounts | awk '{ print $2; }'`
tracing=$debugfs/tracing

tracing()
{
	sudo sh -c "cd $tracing; $1" || true
}

tracing_start()
{
	tracing "echo :mod:ldt > set_ftrace_filter"
	tracing "echo function > current_tracer" # need for draw_functrace.py
	tracing "echo 1 > function_profile_enabled"
}

tracing_stop()
{
	( echo Profiling data per CPU
	tracing "cat trace_stat/function*" )> trace_stat.log && echo trace_stat.log saved
	tracing "echo 0 > function_profile_enabled"
	sudo cp $tracing/trace ftrace.log && echo ftrace.log saved
	sudo dd iflag=nonblock if=$tracing/trace_pipe 2> /dev/null > trace_pipe.log || true && echo trace_pipe.log saved
	tracing "echo nop > current_tracer"
	#export PYTHONPATH=/usr/src/linux-headers-$(uname -r)/scripts/tracing/
	# draw_functrace.py needs function tracer
	python /usr/src/linux-headers-$(uname -r)/scripts/tracing/draw_functrace.py \
		< trace_pipe.log > functrace.log && echo functrace.log saved || true
}

sudo dmesg -n 7
sudo rmmod ldt 2> /dev/null
sudo dmesg -c > /dev/null

# configure UART because it is used for demostration of the driver
stty -F /dev/ttyS0 115200
set -o errexit

#
# Check for presence looback on /dev/ttyS0.
# If loopback is not present, switch loopback on in the driver
#

data='loopback?'
received=`echo $data | ./dio  --ignore_eof --loops 2 --delay 10 /dev/ttyS0 2> /dev/null`
if [ "$data" == "$received" ]; then
echo -e "Loopback on /dev/ttyS0 detected"
loopback=0
else
echo -e "No loopback behind /dev/ttyS0 detected, running ldt driver with UART in loopback mode"
loopback=1
fi

# clean data
echo | ./dio  --ignore_eof --loops 10 --delay 10 /dev/ttyS0 2> /dev/null > /dev/null

sudo insmod ldt.ko loopback=$loopback

tracing_start || true
#. /sys/class/misc/ldt/uevent 2> /dev/null || true # get $MAJOR $MINOR
#. /sys/class/ldt/ldt/uevent 2> /dev/null || true # get $MAJOR $MINOR
#sudo sh -c "rm /dev/ldt;sudo mknod /dev/ldt c $MAJOR $MINOR; chmod o+rw /dev/ldt"
sudo sh -c "chmod go+rw /dev/ldt*"
data=123rw
echo $data > /dev/ldt
sleep 0.5
received=`dd iflag=nonblock if=/dev/ldt 2> /dev/null || true`
if [ "$data" == "$received" ]; then
echo -e "${GREEN}LDT nonblocking read/write test passed$NOCOLOR"
else
echo -e "${RED}LDT nonblock read/write test failed$NOCOLOR"
echo expected $data
echo received $received
fi

data=123bl
cat /dev/ldt > R.tmp &
sleep 0.5; echo $data > /dev/ldt;
sleep 0.5
kill %1; wait %1 2> /dev/null || true
received=`cat R.tmp`
rm -f R.tmp

if [ "$data" == "$received" ]; then
echo -e "${GREEN}LDT blocking read/write test passed$NOCOLOR"
else
echo -e "${RED}LDT blocking read/write test failed$NOCOLOR"
echo expected $data
echo received $received
fi

data=123mmap
received=`sudo echo $data | ./dio --mmap /dev/ldt`
if [ "$data" == "$received" ]; then
echo -e "${GREEN}LDT mmap test passed$NOCOLOR"
else
echo -e "${RED}LDT mmap test failed$NOCOLOR"
echo expected $data
echo received $received
fi

data=123ioctl
received=`sudo echo $data | ./dio --ioctl /dev/ldt`
if [ "$data" == "$received" ]; then
echo -e "${GREEN}LDT ioctl test passed$NOCOLOR"
else
echo -e "${RED}LDT ioctl test failed$NOCOLOR"
echo expected $data
echo received $received
fi

sudo ls -l /sys/kernel/debug/ldt

tracing_stop || true
sudo dmesg --notime --show-delta --read-clear 2>/dev/null > kernel.log || \
sudo dmesg -c > kernel.log && echo kernel.log saved