Add a basic testcase for blktrace. For making it portable, this test uses a loop device.
Signed-off-by: Masami Hiramatsu mhiramat@kernel.org --- tools/testing/selftests/ftrace/config | 1 .../testing/selftests/ftrace/test.d/tracer/blk.tc | 91 ++++++++++++++++++++ 2 files changed, 92 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/tracer/blk.tc
diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config index c2c8de4fafff..d999032442e1 100644 --- a/tools/testing/selftests/ftrace/config +++ b/tools/testing/selftests/ftrace/config @@ -5,6 +5,7 @@ CONFIG_TRACER_SNAPSHOT=y CONFIG_STACK_TRACER=y CONFIG_HIST_TRIGGERS=y CONFIG_SCHED_TRACER=y +CONFIG_BLK_DEV_IO_TRACE=y CONFIG_PREEMPT_TRACER=y CONFIG_IRQSOFF_TRACER=y CONFIG_PREEMPTIRQ_DELAY_TEST=m diff --git a/tools/testing/selftests/ftrace/test.d/tracer/blk.tc b/tools/testing/selftests/ftrace/test.d/tracer/blk.tc new file mode 100644 index 000000000000..9d6e72810c8a --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/tracer/blk.tc @@ -0,0 +1,91 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL2.0 +# description: Test blktrace + +IMG=$TMPDIR/fs.img +MNTDIR=$TMPDIR/mnt + +if ! grep -wq "blk" available_tracers ; then + echo "blktrace is not supported" + exit_unsupported +fi + +available_fs() { #fstype + grep -q $1 /proc/filesystems && which mkfs.$1 +} + +if available_fs ext3; then + FSTYPE=ext3 +elif available_fs ext4; then + FSTYPE=ext4 +elif available_fs ext2; then + FSTYPE=ext2 +elif available_fs xfs; then + FSTYPE=xfs +elif available_fs btrfs; then + FSTYPE=btrfs +else + echo "No available block-based filesystems" + exit_unresolved +fi + +if ! which losetup; then + echo "No losetup found" + exit_unresolved +fi +LODEV=`losetup -f` +LODEVTRACE=/sys/block/`basename $LODEV`/trace + +do_cleanup() { + if [ -d $MNTDIR ]; then + umount $MNTDIR ||: + fi + losetup -d $LODEV ||: + rm -f $IMG +} + +# workload failure is not a tracer's failure +workload_fail() { + do_cleanup + echo "Failed to run workload" + exit_unresolved +} + +do_fail() { + do_cleanup + echo "Test failed" + exit 1 +} + +enable_lodevtrace() { + if [ `cat $LODEVTRACE/enable` -ne 1 ]; then + echo 1 > $LODEVTRACE/enable + fi +} + +echo blk > current_tracer + +dd if=/dev/zero of=$IMG bs=1M count=10 &&\ +losetup $LODEV $IMG &&\ +mkfs.$FSTYPE $LODEV &&\ +mkdir -p $MNTDIR &&\ +mount -t $FSTYPE $LODEV $MNTDIR &&\ +enable_lodevtrace &&\ +dd if=/dev/urandom of=$MNTDIR/testfile bs=1M count=1 &&\ +sync &&\ +umount $MNTDIR || workload_fail + +grep -q "[dd]" trace || do_fail +grep -q "[umount]" trace || do_fail +echo > trace + +losetup $LODEV $IMG &&\ +mount -t $FSTYPE $LODEV $MNTDIR &&\ +cat $MNTDIR/testfile > /dev/null &&\ +echo 0 > $LODEVTRACE/enable &&\ +umount $MNTDIR || workload_fail + +grep -q "[cat]" trace || do_fail +grep -q "[mount]" trace || do_fail + +do_cleanup