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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
#
# FSQA Test No. 483
#
# Test that fsync operations preserve extents allocated with fallocate(2) that
# are placed beyond a file's size.
#
. ./common/preamble
_begin_fstest auto quick log metadata fiemap prealloc
# Override the default cleanup function.
_cleanup()
{
_cleanup_flakey
cd /
rm -f $tmp.*
}
# Import common functions.
. ./common/filter
. ./common/dmflakey
. ./common/punch
# real QA test starts here
_supported_fs generic
_require_scratch
_require_dm_target flakey
_require_xfs_io_command "falloc" "-k"
_require_xfs_io_command "fiemap"
_scratch_mkfs >>$seqres.full 2>&1
_require_metadata_journaling $SCRATCH_DEV
_init_flakey
_mount_flakey
# The fiemap results in the golden output requires file allocations to align to
# 256K boundaries.
_require_congruent_file_oplen $SCRATCH_MNT 262144
# Create our test files.
$XFS_IO_PROG -f -c "pwrite -S 0xea 0 256K" $SCRATCH_MNT/foo >/dev/null
# Create a file with many extents. We later want to shrink truncate it and
# add a prealloc extent beyond its new size.
for ((i = 1; i <= 500; i++)); do
offset=$(((i - 1) * 4 * 1024))
$XFS_IO_PROG -f -s -c "pwrite -S 0xcf $offset 4K" \
$SCRATCH_MNT/bar >/dev/null
done
# A file which already has a prealloc extent beyond its size.
# The fsync done on it is motivated by differences in the btrfs implementation
# of fsync (first fsync has different logic from subsequent fsyncs).
$XFS_IO_PROG -f -c "pwrite -S 0xf1 0 256K" \
-c "falloc -k 256K 768K" \
-c "fsync" \
$SCRATCH_MNT/baz >/dev/null
# Make sure everything done so far is durably persisted.
sync
# Allocate an extent beyond the size of the first test file and fsync it.
$XFS_IO_PROG -c "falloc -k 256K 1M"\
-c "fsync" \
$SCRATCH_MNT/foo
# Do a shrinking truncate of our test file, add a prealloc extent to it after
# its new size and fsync it.
$XFS_IO_PROG -c "truncate 256K" \
-c "falloc -k 256K 1M"\
-c "fsync" \
$SCRATCH_MNT/bar
# Allocate another extent beyond the size of file baz.
$XFS_IO_PROG -c "falloc -k 1M 2M"\
-c "fsync" \
$SCRATCH_MNT/baz
# Simulate a power failure and mount the filesystem to check that the extents
# previously allocated were not lost and the file sizes are correct.
_flakey_drop_and_remount
echo "File foo fiemap:"
$XFS_IO_PROG -c "fiemap -v" $SCRATCH_MNT/foo | _filter_hole_fiemap
echo "File foo size:"
stat --format %s $SCRATCH_MNT/foo
echo "File bar fiemap:"
$XFS_IO_PROG -c "fiemap -v" $SCRATCH_MNT/bar | _filter_hole_fiemap
echo "File bar size:"
stat --format %s $SCRATCH_MNT/bar
echo "File baz fiemap:"
$XFS_IO_PROG -c "fiemap -v" $SCRATCH_MNT/baz | _filter_hole_fiemap
echo "File baz size:"
stat --format %s $SCRATCH_MNT/baz
_unmount_flakey
_cleanup_flakey
status=0
exit
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