Commit f615e2bb authored by Hiraku Toyooka's avatar Hiraku Toyooka Committed by Shuah Khan

selftests/pstore: add pstore test scripts going with reboot

To test pstore in earnest, we have to cause kernel crash and check
pstore filesystem after reboot.

We add two scripts:
 - pstore_crash_test
     This script causes kernel crash and reboot. It is executed by
     'make run_pstore_crash' in selftests. It can also be used with kdump.
 - pstore_post_reboot_tests
     This script includes test cases which check pstore's behavior after
     crash and reboot. It is executed together with pstore_tests by
     'make run_tests [-C pstore]' in selftests.

The test cases in pstore_post_reboot_tests are currently following.

- Check pstore backend is registered
- Mount pstore filesystem
- Check dmesg/console/pmsg files exist in pstore filesystem
- Check dmesg/console files contain oops end marker
- Check pmsg file properly keeps the content written before crash
- Remove all files in pstore filesystem

Example usage is following.

  (before reboot)
  # cd /path/to/selftests
  # make run_tests -C pstore
  === Pstore unit tests (pstore_tests) ===
  UUID=b49b02cf-b0c2-4309-be43-b08c3971e37f
  ...
  selftests: pstore_tests [PASS]
  === Pstore unit tests (pstore_post_reboot_tests) ===
  UUID=953eb1bc-8e03-48d7-b27a-6552b24c5b7e
  Checking pstore backend is registered ... ok
          backend=ramoops
          cmdline=console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait mem=768M ramoops.mem_address=0x30000000 ramoops.mem_size=0x10000
  pstore_crash_test has not been executed yet. we skip further tests.
  selftests: pstore_post_reboot_tests [PASS]

  # make run_pstore_crash
  === Pstore unit tests (pstore_crash_test) ===
  UUID=93c8972d-1466-430b-8c4a-28d8681e74c6
  Checking pstore backend is registered ... ok
          backend=ramoops
          cmdline=console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait mem=768M ramoops.mem_address=0x30000000 ramoops.mem_size=0x10000
  Causing kernel crash ...
  (kernel crash and reboot)
  ...

  (after reboot)
  # make run_tests -C pstore
  === Pstore unit tests (pstore_tests) ===
  UUID=8e511e77-2285-499f-8bc0-900d9af1fbcc
  ...
  selftests: pstore_tests [PASS]
  === Pstore unit tests (pstore_post_reboot_tests) ===
  UUID=2dcc2132-4f3c-45aa-a38f-3b54bff8cef1
  Checking pstore backend is registered ... ok
          backend=ramoops
          cmdline=console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait mem=768M ramoops.mem_address=0x30000000 ramoops.mem_size=0x10000
  Mounting pstore filesystem ... ok
  Checking dmesg files exist in pstore filesystem ... ok
          dmesg-ramoops-0
          dmesg-ramoops-1
  Checking console files exist in pstore filesystem ... ok
          console-ramoops-0
  Checking pmsg files exist in pstore filesystem ... ok
          pmsg-ramoops-0
  Checking dmesg files contain oops end marker
          dmesg-ramoops-0 ... ok
          dmesg-ramoops-1 ... ok
  Checking console file contains oops end marker ... ok
  Checking pmsg file properly keeps the content written before crash ... ok
  Removing all files in pstore filesystem
          console-ramoops-0 ... ok
          dmesg-ramoops-0 ... ok
          dmesg-ramoops-1 ... ok
          pmsg-ramoops-0 ... ok
  selftests: pstore_post_reboot_tests [PASS]
Signed-off-by: default avatarHiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Seiji Aguchi <seiji.aguchi.tr@hitachi.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org
Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
parent cc04a46f
......@@ -66,6 +66,9 @@ clean_hotplug:
make -C $$TARGET clean; \
done;
run_pstore_crash:
make -C pstore run_crash
INSTALL_PATH ?= install
INSTALL_PATH := $(abspath $(INSTALL_PATH))
ALL_SCRIPT := $(INSTALL_PATH)/run_kselftest.sh
......
......@@ -3,10 +3,13 @@
all:
TEST_PROGS := pstore_tests
TEST_FILES := common_tests
TEST_PROGS := pstore_tests pstore_post_reboot_tests
TEST_FILES := common_tests pstore_crash_test
include ../lib.mk
run_crash:
@sh pstore_crash_test || { echo "pstore_crash_test: [FAIL]"; exit 1; }
clean:
rm -rf logs/* *uuid
......@@ -26,11 +26,39 @@ show_result() { # result_value
fi
}
check_files_exist() { # type of pstorefs file
if [ -e ${1}-${backend}-0 ]; then
prlog "ok"
for f in `ls ${1}-${backend}-*`; do
prlog -e "\t${f}"
done
else
prlog "FAIL"
rc=1
fi
}
operate_files() { # tested value, files, operation
if [ $1 -eq 0 ]; then
prlog
for f in $2; do
prlog -ne "\t${f} ... "
# execute operation
$3 $f
show_result $?
done
else
prlog " ... FAIL"
rc=1
fi
}
# Parameters
TEST_STRING_PATTERN="Testing pstore: uuid="
UUID=`cat /proc/sys/kernel/random/uuid`
TOP_DIR=`absdir $0`
LOG_DIR=$TOP_DIR/logs/`date +%Y%m%d-%H%M%S`_${UUID}/
REBOOT_FLAG=$TOP_DIR/reboot_flag
# Preparing logs
LOG_FILE=$LOG_DIR/`basename $0`.log
......
#!/bin/sh
# pstore_crash_test - Pstore test shell script which causes crash and reboot
#
# Copyright (C) Hitachi Ltd., 2015
# Written by Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
#
# Released under the terms of the GPL v2.
# exit if pstore backend is not registered
. ./common_tests
prlog "Causing kernel crash ..."
# enable all functions triggered by sysrq
echo 1 > /proc/sys/kernel/sysrq
# setting to reboot in 3 seconds after panic
echo 3 > /proc/sys/kernel/panic
# save uuid file by different name because next test execution will replace it.
mv $TOP_DIR/uuid $TOP_DIR/prev_uuid
# create a file as reboot flag
touch $REBOOT_FLAG
sync
# cause crash
# Note: If you use kdump and want to see kmesg-* files after reboot, you should
# specify 'crash_kexec_post_notifiers' in 1st kernel's cmdline.
echo c > /proc/sysrq-trigger
#!/bin/sh
# pstore_post_reboot_tests - Check pstore's behavior after crash/reboot
#
# Copyright (C) Hitachi Ltd., 2015
# Written by Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
#
# Released under the terms of the GPL v2.
. ./common_tests
if [ -e $REBOOT_FLAG ]; then
rm $REBOOT_FLAG
else
prlog "pstore_crash_test has not been executed yet. we skip further tests."
exit 0
fi
prlog -n "Mounting pstore filesystem ... "
mount_info=`grep pstore /proc/mounts`
if [ $? -eq 0 ]; then
mount_point=`echo ${mount_info} | cut -d' ' -f2 | head -n1`
prlog "ok"
else
mount none /sys/fs/pstore -t pstore
if [ $? -eq 0 ]; then
mount_point=`grep pstore /proc/mounts | cut -d' ' -f2 | head -n1`
prlog "ok"
else
prlog "FAIL"
exit 1
fi
fi
cd ${mount_point}
prlog -n "Checking dmesg files exist in pstore filesystem ... "
check_files_exist dmesg
prlog -n "Checking console files exist in pstore filesystem ... "
check_files_exist console
prlog -n "Checking pmsg files exist in pstore filesystem ... "
check_files_exist pmsg
prlog -n "Checking dmesg files contain oops end marker"
grep_end_trace() {
grep -q "\---\[ end trace" $1
}
files=`ls dmesg-${backend}-*`
operate_files $? "$files" grep_end_trace
prlog -n "Checking console file contains oops end marker ... "
grep -q "\---\[ end trace" console-${backend}-0
show_result $?
prlog -n "Checking pmsg file properly keeps the content written before crash ... "
prev_uuid=`cat $TOP_DIR/prev_uuid`
if [ $? -eq 0 ]; then
nr_matched=`grep -c "$TEST_STRING_PATTERN" pmsg-${backend}-0`
if [ $nr_matched -eq 1 ]; then
grep -q "$TEST_STRING_PATTERN"$prev_uuid pmsg-${backend}-0
show_result $?
else
prlog "FAIL"
rc=1
fi
else
prlog "FAIL"
rc=1
fi
prlog -n "Removing all files in pstore filesystem "
files=`ls *-${backend}-*`
operate_files $? "$files" rm
exit $rc
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