blob: 40dcba9ca2d1ccbde8fc37a3b1af76df02aaf2a0 [file] [log] [blame]
#! /bin/bash
# FS QA Test 032
#
# Test concurrent copy up of lower hardlinks.
#
# Two tasks make a metadata change concurrently on two hardlinks of a large
# lower inode. The copy up should be triggers by one of the tasks and the
# other should be waiting for copy up to complete. Both copy up targets
# should end up being upper hardlinks and both metadata changes should be
# applied.
#
#-----------------------------------------------------------------------
# Copyright (C) 2017 CTERA Networks. All Rights Reserved.
# Author: Amir Goldstein <amir73il@gmail.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"
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
_require_scratch_feature index
# Remove all files from previous tests
_scratch_mkfs
# overlay copy_up doesn't deal with sparse file well, holes will be filled by
# zeros, so if both hardlinks are broken on copy up, we need (2*1G) free space
# on $OVL_BASE_SCRATCH_MNT.
_require_fs_space $OVL_BASE_SCRATCH_MNT $((1024*1024*2))
# Create a large file in lower with 2 hardlinks.
# Make the file have non zero blocks, so copy up won't be able to do
# a naive sparse file copy up optimization.
lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
mkdir -p $lowerdir
$XFS_IO_PROG -fc "pwrite 1g 4k" $lowerdir/zero >> $seqres.full
ln $lowerdir/zero $lowerdir/one
ln $lowerdir/zero $lowerdir/two
# Enable overlay index feature to prevent breaking hardlinks on copy up
_scratch_mount -o index=on
do_cmd()
{
echo "`date +%T` $1..." >> $seqres.full
eval "$1"
echo "`date +%T` ...$1" >> $seqres.full
}
# Perform one modification on each hardlink (size and owner)
do_cmd "echo >> $SCRATCH_MNT/one" &
#
# When hardlinks are broken and overlayfs supports concurrent copy up,
# $seqres.full will show that file two copy up started ~2s after file one
# copy up started and ended ~2s after file one copy up ended.
# With synchronized copy up of lower inodes, $seqres.full will show that
# file two copy up ended at the same time as file one copy up.
# Without sparse file copy up optimizations, copy of 1g on a standard disk
# is expected to take more than 2s.
# If underlying filesystem supports clone, overlay clone up with take less
# than 1s and this test will not be doing concurrent copy up of hardlinks,
# but rather consequent copy up of hardlinks.
#
sleep 2
do_cmd "chown 100 $SCRATCH_MNT/two" &
wait
# Expect all hardlinks to show both metadata modifications (owner and size).
# List <nlink> <owner> <size> <name>:
for f in zero one two; do
_ls_l -n $SCRATCH_MNT/$f | awk '{ print $2, $3, $5, $9 }' | _filter_scratch
done
status=0
exit