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#!/bin/ksh -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.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright (c) 2020 by Lawrence Livermore National Security, LLC.
# Copyright (c) 2021 by The FreeBSD Foundation.
#
. $STF_SUITE/include/libtest.shlib
#
# DESCRIPTION:
# Test FALLOC_FL_ZERO_RANGE functionality
#
# STRATEGY:
# 1. Create a dense file
# 2. Zero various ranges in the file and verify the result.
#
verify_runnable "global"
if is_freebsd; then
log_unsupported "FreeBSD does not implement an analogue to ZERO_RANGE."
fi
FILE=$TESTDIR/$TESTFILE0
BLKSZ=$(get_prop recordsize $TESTPOOL)
function cleanup
{
[[ -e $TESTDIR ]] && log_must rm -f $FILE
}
# Helpfully, this function expects kilobytes, and check_apparent_size expects bytes.
function check_reported_size
{
typeset expected_size=$1
if ! [ -e "${FILE}" ]; then
log_fail "$FILE does not exist"
fi
reported_size=$(du "${FILE}" | awk '{print $1}')
if [ "$reported_size" != "$expected_size" ]; then
log_fail "Incorrect reported size: $reported_size != $expected_size"
fi
}
function check_apparent_size
{
typeset expected_size=$1
apparent_size=$(stat_size "${FILE}")
if [ "$apparent_size" != "$expected_size" ]; then
log_fail "Incorrect apparent size: $apparent_size != $expected_size"
fi
}
log_assert "Ensure ranges can be zeroed in files"
log_onexit cleanup
# Create a dense file and check it is the correct size.
log_must file_write -o create -f $FILE -b $BLKSZ -c 8
sync_pool $TESTPOOL
log_must check_reported_size 1027
# Zero a range covering the first full block.
log_must zero_range 0 $BLKSZ $FILE
sync_pool $TESTPOOL
log_must check_reported_size 899
# Partially zero a range in the second block.
log_must zero_range $BLKSZ $((BLKSZ / 2)) $FILE
sync_pool $TESTPOOL
log_must check_reported_size 899
# Zero range which overlaps the third and fourth block.
log_must zero_range $(((BLKSZ * 2) + (BLKSZ / 2))) $((BLKSZ)) $FILE
sync_pool $TESTPOOL
log_must check_reported_size 899
# Zero range from the fifth block past the end of file, with --keep-size.
# The apparent file size must not change, since we did specify --keep-size.
apparent_size=$(stat_size $FILE)
log_must fallocate --keep-size --zero-range --offset $((BLKSZ * 4)) --length $((BLKSZ * 10)) "$FILE"
sync_pool $TESTPOOL
log_must check_reported_size 387
log_must check_apparent_size $apparent_size
# Zero range from the fifth block past the end of file. The apparent
# file size should change since --keep-size is not implied, unlike
# with PUNCH_HOLE.
apparent_size=$(stat_size $FILE)
log_must zero_range $((BLKSZ * 4)) $((BLKSZ * 10)) $FILE
sync_pool $TESTPOOL
log_must check_reported_size 387
log_must check_apparent_size $((BLKSZ * 14))
log_pass "Ensure ranges can be zeroed in files"
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