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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
#
# FS QA Test No. 176
#
# See how well reflink handles reflinking a file with a million extents.
#
. ./common/preamble
_begin_fstest auto clone punch
# Import common functions.
. ./common/filter
. ./common/attr
. ./common/reflink
# real QA test starts here
_require_scratch_reflink
_require_cp_reflink
_require_xfs_io_command "fpunch"
_require_test_program "punch-alternating"
rm -f "$seqres.full"
echo "Format and mount"
_scratch_mkfs > "$seqres.full" 2>&1
_scratch_mount >> "$seqres.full" 2>&1
testdir="$SCRATCH_MNT/test-$seq"
mkdir "$testdir"
# Setup for one million blocks, but we'll accept stress testing down to
# 2^17 blocks... that should be plenty for anyone.
fnr=20
free_blocks=$(stat -f -c '%a' "$testdir")
blksz=$(_get_block_size "$testdir")
space_avail=$((free_blocks * blksz))
calc_space() {
blocks_needed=$(( 2 ** (fnr + 1) ))
space_needed=$((blocks_needed * blksz * 5 / 4))
}
calc_space
while test $space_needed -gt $space_avail; do
fnr=$((fnr - 1))
calc_space
done
test $fnr -lt 17 && _notrun "Insufficient space for stress test; would only create $blocks_needed extents."
echo "Create a many-block file"
echo "creating $blocks_needed blocks..." >> "$seqres.full"
$XFS_IO_PROG -f -c "pwrite -S 0x61 -b 4194304 0 $((2 ** (fnr + 1) * blksz))" "$testdir/file1" >> "$seqres.full"
echo "punching..." >> "$seqres.full"
"$here/src/punch-alternating" "$testdir/file1" >> "$seqres.full"
echo "...done" >> "$seqres.full"
_scratch_cycle_mount
echo "Reflink the big file"
bytes=$((blocks_needed * blksz))
echo "reflinking $((blocks_needed / 2)) blocks, $((bytes / 2)) bytes" >> "$seqres.full"
_reflink_range "$testdir/file1" 0 "$testdir/file2" 0 $bytes >> "$seqres.full"
# success, all done
status=0
exit
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