zfs/tests/zfs-tests/tests/functional/atime/root_relatime_on.ksh

#!/bin/ksh -p
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# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
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#
# Copyright (c) 2019 by Tomohiro Kusumi. All rights reserved.
#

. $STF_SUITE/tests/functional/atime/atime_common.kshlib

#
# DESCRIPTION:
# When relatime=on, verify the access time for files is updated when first
# read but not on second.
# It is available to fs and clone. To snapshot, it is unavailable.
#
# STRATEGY:
# 1. Create pool and fs.
# 2. Create '$TESTFILE' for fs.
# 3. Create snapshot and clone.
# 4. Setting atime=on and relatime=on on datasets.
# 5. Expect the access time is updated for first read but not on second.
#

verify_runnable "both"

log_assert "Setting relatime=on, the access time for files is updated when \
	when read the first time, but not second time."
log_onexit cleanup

#
# Create $TESTFILE, snapshot and clone.
# Same as 003 except that atime/relatime applies to root dataset (ZoL#8675).
#
setup_snap_clone
reset_atime

for dst in $TESTPOOL/$TESTFS $TESTPOOL/$TESTCLONE $TESTPOOL/$TESTFS@$TESTSNAP
do
	typeset mtpt=$(get_prop mountpoint $dst)

	if [[ $dst == $TESTPOOL/$TESTFS@$TESTSNAP ]]; then
		mtpt=$(snapshot_mountpoint $dst)
		log_mustnot check_atime_updated $mtpt/$TESTFILE
	else
		log_must zfs set atime=on $(dirname $dst)
		log_must zfs set relatime=on $(dirname $dst)
		log_must check_atime_updated $mtpt/$TESTFILE
		log_mustnot check_atime_updated $mtpt/$TESTFILE
	fi
done

log_pass "Verify the property relatime=on passed."