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#!/usr/bin/bash -p
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source. A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#
#
# Copyright 2018 Joyent, Inc.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/reservation/reservation.shlib
#
# DESCRIPTION:
#
# Cloning a volume with -o refreservation=auto creates a thick provisioned
# volume
#
# STRATEGY:
# 1) Create a sparse volume.
# 2) Snapshot and clone it, using clone -o refreservation=auto.
# 3) Verify that the clone has refreservation that matches the size predicted by
# volsize_to_reservation().
# 4) Snapshot this second volume and clone it, using clone -o
# refreservation=auto.
# 5) Verify that the second clone has refreservation that matches the size
# predicted by volsize_to_reservation().
#
verify_runnable "global"
function cleanup
{
if datasetexists $TESTPOOL/$TESTVOL; then
# Destroy first vol and descendants in one go.
log_must zfs destroy -Rf $TESTPOOL/$TESTVOL
fi
}
log_onexit cleanup
log_assert "Cloning a volume with -o refreservation=auto creates a thick" \
"provisioned volume"
space_avail=$(get_prop available $TESTPOOL)
(( vol_size = (space_avail / 4) & ~(1024 * 1024 - 1) ))
vol=$TESTPOOL/$TESTVOL
vol2=$TESTPOOL/$TESTVOL2
vol3=$TESTPOOL/$TESTVOL2-again
# Create sparse vol and verify
log_must zfs create -s -V $vol_size $vol
resv=$(get_prop refreservation $vol)
log_must test $resv -eq 0
# Clone it
snap=$vol@clone
log_must zfs snapshot $snap
log_must zfs clone -o refreservation=auto $snap $vol2
# Verify it is thick provisioned
resv=$(get_prop refreservation $vol2)
expected=$(volsize_to_reservation $vol2 $vol_size)
log_must test $resv -eq $expected
# Clone the thick provisioned volume
snap=$vol2@clone
log_must zfs snapshot $snap
log_must zfs clone -o refreservation=auto $snap $vol3
# Verify new newest clone is also thick provisioned
resv=$(get_prop refreservation $vol3)
expected=$(volsize_to_reservation $vol3 $vol_size)
log_must test $resv -eq $expected
log_pass "Cloning a thick provisioned volume results in a sparse volume"
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