functional/reservation/reservation_004_pos.sh

#!/bin/bash -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
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# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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# fields enclosed by brackets "[]" replaced with your own identifying
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#
# Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

#
# Copyright (c) 2013, 2016 by Delphix. All rights reserved.
#

. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/reservation/reservation.shlib

#
# DESCRIPTION:
#
# When a dataset which has a reservation set on it is destroyed,
# the space consumed or reserved by that dataset should be released
# back into the pool.
#
# STRATEGY:
# 1) Create a filesystem, regular and sparse volume
# 2) Get the space used and available in the pool
# 3) Set a reservation on the filesystem less than the space available.
# 4) Verify that the 'reservation' property for the filesystem has
# the correct value.
# 5) Destroy the filesystem without resetting the reservation value.
# 6) Verify that the space used and available totals for the pool have
# changed by the expected amounts (within tolerances).
# 7) Repeat steps 3-6 for a regular volume and sparse volume
#

verify_runnable "both"

function cleanup {

    for obj in $OBJ_LIST; do
        datasetexists $obj && log_must zfs destroy -f $obj
    done
}

log_assert "Verify space released when a dataset with reservation is destroyed"

log_onexit cleanup

log_must zfs create $TESTPOOL/$TESTFS2

space_avail=`get_prop available $TESTPOOL`

if ! is_global_zone ; then
    OBJ_LIST="$TESTPOOL/$TESTFS2"
else
    OBJ_LIST="$TESTPOOL/$TESTFS2 \
        $TESTPOOL/$TESTVOL $TESTPOOL/$TESTVOL2"

    ((vol_set_size = space_avail / 4))
    vol_set_size=$(floor_volsize $vol_set_size)
    ((sparse_vol_set_size = space_avail * 4))
    sparse_vol_set_size=$(floor_volsize $sparse_vol_set_size)

    log_must zfs create -V $vol_set_size $TESTPOOL/$TESTVOL
    log_must zfs set refreservation=none $TESTPOOL/$TESTVOL
    log_must zfs set reservation=none $TESTPOOL/$TESTVOL
    log_must zfs create -s -V $sparse_vol_set_size $TESTPOOL/$TESTVOL2
fi

# re-calculate space available.
space_avail=`get_prop available $TESTPOOL`

# Calculate a large but valid reservation value.
resv_size_set=`expr $space_avail - $RESV_DELTA`

for obj in $OBJ_LIST ; do

    space_avail=`get_prop available $TESTPOOL`
    space_used=`get_prop used $TESTPOOL`

    #
    # For regular (non-sparse) volumes the upper limit is determined
    # not by the space available in the pool but rather by the size
    # of the volume itself.
    #
    [[ $obj == $TESTPOOL/$TESTVOL ]] && \
        ((resv_size_set = vol_set_size - RESV_DELTA))

    log_must zfs set reservation=$resv_size_set $obj

    resv_size_get=`get_prop reservation $obj`
    if [[ $resv_size_set != $resv_size_get ]]; then
        log_fail "Reservation not the expected value " \
        "($resv_size_set != $resv_size_get)"
    fi

    log_must zfs destroy -f $obj

    new_space_avail=`get_prop available $TESTPOOL`
    new_space_used=`get_prop used $TESTPOOL`

    log_must within_limits $space_used $new_space_used $RESV_TOLERANCE
    log_must within_limits $space_avail $new_space_avail $RESV_TOLERANCE
done

log_pass "Space correctly released when dataset is destroyed"