mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
92 lines
2.9 KiB
Bash
92 lines
2.9 KiB
Bash
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#! /bin/bash
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# FS QA Test 036
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#
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# Test mount error cases with exclusive directories
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#
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# Overlayfs is often used to mount several mounts that share a single
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# lower dir, but every overlayfs mount should have its own private
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# upperdir and private workdir.
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#
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# Overlayfs mount on kernel <= v4.12 does not check if upper/work dirs
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# are currently in-use by another overlayfs mount on the system and bad
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# things can happen with such configuration.
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#
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# Expect EBUSY when trying to mount overlay when:
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# - Upper dir is in-use by another overlay mount
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# - Work dir is in-use by another overlay mount
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#
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#-----------------------------------------------------------------------
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# Copyright (C) 2017 CTERA Networks. All Rights Reserved.
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# Author: Amir Goldstein <amir73il@gmail.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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# unmount the two extra mounts in case they did not fail
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$UMOUNT_PROG $SCRATCH_MNT 2>/dev/null
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$UMOUNT_PROG $SCRATCH_MNT 2>/dev/null
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs overlay
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_supported_os Linux
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_require_scratch
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# Remove all files from previous tests
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_scratch_mkfs
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# Create multiple lowerdirs, upperdirs and workdirs
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lowerdir=$OVL_BASE_SCRATCH_MNT/lower
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lowerdir2=$OVL_BASE_SCRATCH_MNT/lower2
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upperdir=$OVL_BASE_SCRATCH_MNT/upper
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upperdir2=$OVL_BASE_SCRATCH_MNT/upper2
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workdir=$OVL_BASE_SCRATCH_MNT/workdir
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workdir2=$OVL_BASE_SCRATCH_MNT/workdir2
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mkdir -p $lowerdir $lowerdir2 $upperdir $upperdir2 $workdir $workdir2
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# Mount overlay with lowerdir, upperdir, workdir
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_overlay_mount_dirs $lowerdir $upperdir $workdir \
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overlay1 $SCRATCH_MNT
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# Try to mount another overlay with the same upperdir - expect EBUSY
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_overlay_mount_dirs $lowerdir2 $upperdir $workdir2 \
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overlay2 $SCRATCH_MNT 2>&1 | _filter_scratch
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# Try to mount another overlay with the same workdir - expect EBUSY
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_overlay_mount_dirs $lowerdir2 $upperdir2 $workdir \
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overlay3 $SCRATCH_MNT 2>&1 | _filter_scratch
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# success, all done
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status=0
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exit
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