[PATCH 1/2] selftests/pstore: add pstore test script for pre-reboot

[Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>]

The pstore_tests script includes test cases which check pstore's
behavior before crash (and reboot).

The test cases are currently following.

- Check pstore backend is registered
- Check pstore console is registered
- Check /dev/pmsg0 exists
- Write string to /dev/pmsg0

Example usage is following.

make: Entering directory '/home/root/selftests/pstore'
=== Pstore unit tests (pstore_tests)===
Checking pstore backend is registered ... ok
Checking pstore console is registered ... ok
Checking /dev/pmsg0 exists ... ok
Writing TEST_STRING to /dev/pmsg0 ... ok
selftests: pstore_tests [PASS]
=== Pstore unit tests (pstore_post_reboot_tests)===
Checking pstore backend is registered ... ok
pstore_crash_test has not been executed yet. we skip further tests.
selftests: pstore_post_reboot_tests [PASS]
make: Leaving directory '/home/root/selftests/pstore'

We can also see test logs later.

Signed-off-by: Hiraku 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@hds.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org
---
 tools/testing/selftests/Makefile            |    1 +
 tools/testing/selftests/pstore/Makefile     |   12 +++++++
 tools/testing/selftests/pstore/common_tests |   45 +++++++++++++++++++++++++++
 tools/testing/selftests/pstore/pstore_tests |   42 +++++++++++++++++++++++++
 4 files changed, 100 insertions(+)
 create mode 100644 tools/testing/selftests/pstore/Makefile
 create mode 100755 tools/testing/selftests/pstore/common_tests
 create mode 100755 tools/testing/selftests/pstore/pstore_tests

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 24ae9e8..b58c72e 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -12,6 +12,7 @@ TARGETS += mount
 TARGETS += mqueue
 TARGETS += net
 TARGETS += powerpc
+TARGETS += pstore
 TARGETS += ptrace
 TARGETS += seccomp
 TARGETS += size
diff --git a/tools/testing/selftests/pstore/Makefile b/tools/testing/selftests/pstore/Makefile
new file mode 100644
index 0000000..40b887d
--- /dev/null
+++ b/tools/testing/selftests/pstore/Makefile
@@ -0,0 +1,12 @@
+# Makefile for pstore selftests.
+# Expects pstore backend is registered.
+
+all:
+
+TEST_PROGS := pstore_tests
+TEST_FILES := common_tests
+
+include ../lib.mk
+
+clean:
+	rm -rf logs/*
diff --git a/tools/testing/selftests/pstore/common_tests b/tools/testing/selftests/pstore/common_tests
new file mode 100755
index 0000000..98611c5
--- /dev/null
+++ b/tools/testing/selftests/pstore/common_tests
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+# common_tests - Shell script commonly used by pstore test scripts
+#
+# Copyright (C) Hitachi Ltd., 2015
+#  Written by Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
+#
+# Released under the terms of the GPL v2.
+
+# Utilities
+errexit() { # message
+  echo "Error: $1" 1>&2
+  exit 1
+}
+
+absdir() { # file_path
+  (cd `dirname $1`; pwd)
+}
+
+# Parameters
+TOP_DIR=`absdir $0`
+LOG_DIR=$TOP_DIR/logs/`date +%Y%m%d-%H%M%S`/
+TEST_STRING="Testing pstore"
+
+# Preparing logs
+LOG_FILE=$LOG_DIR/`basename $0`.log
+mkdir -p $LOG_DIR || errexit "Failed to make a log directory: $LOG_DIR"
+date > $LOG_FILE
+prlog() { # messages
+  /bin/echo "$@" | tee -a $LOG_FILE
+}
+prlog "=== Pstore unit tests (`basename $0`)==="
+
+# Starting tests
+rc=0
+
+prlog -n "Checking pstore backend is registered ... "
+be_msg=`dmesg | grep "pstore: Registered [a-zA-Z0-9]\+ as persistent store backend$"`
+if [ $? -eq 0 ]; then
+    backend=`echo ${be_msg} | sed -e 's/^.*Registered\ \([a-zA-z0-9-]\+\)\ as.*$/\1/g'`
+    prlog "ok"
+else
+    prlog "FAIL"
+    exit 1
+fi
diff --git a/tools/testing/selftests/pstore/pstore_tests b/tools/testing/selftests/pstore/pstore_tests
new file mode 100755
index 0000000..cbf613c
--- /dev/null
+++ b/tools/testing/selftests/pstore/pstore_tests
@@ -0,0 +1,42 @@
+#!/bin/sh
+
+# pstore_tests - Check pstore's behavior before 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
+
+prlog -n "Checking pstore console is registered ... "
+dmesg | grep -q "console \[pstore"
+if [ $? -eq 0 ]; then
+    prlog "ok"
+else
+    prlog "FAIL"
+fi
+
+prlog -n "Checking /dev/pmsg0 exists ... "
+if [ -e "/dev/pmsg0" ]; then
+    prlog "ok"
+else
+    prlog "FAIL"
+    rc=1
+fi
+
+prlog -n "Writing TEST_STRING to /dev/pmsg0 ... "
+if [ -e "/dev/pmsg0" ]; then
+    echo "${TEST_STRING}" > /dev/pmsg0
+    if [ $? -eq 0 ]; then
+	prlog "ok"
+    else
+	prlog "FAIL"
+	rc=1
+    fi
+else
+    prlog "FAIL"
+    rc=1
+fi
+
+exit $rc