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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Oracle, Inc. All rights reserved.
#
# FS QA Test No. 450
#
# Make sure that the statfs b_avail counter doesn't change across remount
# after the rmapbt has grown in size.
#
. ./common/preamble
_begin_fstest auto quick rmap prealloc
# Import common functions.
. ./common/filter
# remove previous \$seqres.full before test
# real QA test starts here
_supported_fs xfs
_require_xfs_io_command "falloc"
_require_test_program "punch-alternating"
_require_xfs_scratch_rmapbt
_scratch_mkfs >> $seqres.full
_scratch_mount
# Make sure we allocate a big enough file such that punching out every other
# block will cause the rmapbt to expand by at least one block.
blksz=$(_get_file_block_size $SCRATCH_MNT)
nr_rmap_per_rmapbt=$(( (blksz - 56) / 24))
blks=$(( (nr_rmap_per_rmapbt + 2) * 2))
$XFS_IO_PROG -f -c "falloc 0 $((blks * blksz))" $SCRATCH_MNT/a >> $seqres.full
$here/src/punch-alternating $SCRATCH_MNT/a
# Do the stat counters change across the remount?
before=$(stat -f -c '%b %f' $SCRATCH_MNT)
_scratch_cycle_mount
after=$(stat -f -c '%b %f' $SCRATCH_MNT)
if [ "${before}" != "${after}" ]; then
echo "counters changed: ${before} ${after}"
echo "before: ${before}" >> $seqres.full
echo "after: ${after}" >> $seqres.full
fi
echo "Silence is golden."
# success, all done
status=0
exit
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