| #! /bin/bash |
| # FS QA Test 002 |
| # |
| # Test that calling fsync against a file using the merged directory does not |
| # result in a crash nor fails unexpectedly. |
| # |
| # This is motivated by a change in overlayfs that resulted in a crash (invalid |
| # memory access) when the lower or upper directory belonged to a btrfs file |
| # system. |
| # |
| #----------------------------------------------------------------------- |
| # |
| # Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved. |
| # Author: Filipe Manana <fdmanana@suse.com> |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation. |
| # |
| # This program is distributed in the hope that it would be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| #----------------------------------------------------------------------- |
| # |
| |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| here=`pwd` |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # remove previous $seqres.full before test |
| rm -f $seqres.full |
| |
| # real QA test starts here |
| _supported_fs overlay |
| _supported_os Linux |
| _require_scratch |
| |
| # Remove all files from previous tests |
| _scratch_mkfs |
| |
| # Create our test file. |
| lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER |
| mkdir -p $lowerdir |
| touch $lowerdir/foobar |
| |
| _scratch_mount |
| |
| # Write some data to our file and fsync it, using the merged directory path. |
| # This should work and not result in a crash. |
| $XFS_IO_PROG -c "pwrite 0 64k" -c "fsync" $SCRATCH_MNT/foobar | _filter_xfs_io |
| |
| # success, all done |
| status=0 |
| exit |