blob: f139d0cc34c568717c5390fd2dcd94c2d70a33bc [file] [log] [blame]
#! /bin/bash
# FS QA Test No. btrfs/058
#
# Regression test for a btrfs issue where we create a RO snapshot to use for
# a send operation which fails with a -ESTALE error, due to the presence of
# orphan inodes accessible through the snapshot's commit root but no longer
# present through the main root.
#
# This issue is fixed by the following linux kernel btrfs patch:
#
# Btrfs: update commit root on snapshot creation after orphan cleanup
#
#-----------------------------------------------------------------------
# Copyright (C) 2014 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"
tmp=/tmp/$$
status=1 # failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15
_cleanup()
{
if [ ! -z $XFS_IO_PID ]; then
kill $XFS_IO_PID > /dev/null 2>&1
fi
rm -fr $tmp
}
# get standard environment, filters and checks
. ./common/rc
. ./common/filter
# real QA test starts here
_supported_fs btrfs
_supported_os Linux
_require_scratch
_require_xfs_io_command "-T"
rm -f $seqres.full
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
# Create a tmpfile file, write some data to it and leave it open, so that our
# main subvolume has an orphan inode item.
$XFS_IO_PROG -T $SCRATCH_MNT >>$seqres.full 2>&1 < <(
echo "pwrite 0 65536"
read
) &
XFS_IO_PID=$!
# Give it some time to the xfs_io process to create the tmpfile.
sleep 3
# With the tmpfile open, create a RO snapshot and use it for a send operation.
# The send operation used to fail with -ESTALE due to the presence of the
# orphan inode.
_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap
_run_btrfs_util_prog send -f /dev/null $SCRATCH_MNT/mysnap
status=0
exit