mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Amir Goldstein
f3bdafb91b
When overlayfs nfs_export feature is enabled by default in either kernel
config or module parameters, this test fails:
mount: /tmp/8751/mnt: mount(2) system call failed: Stale file handle.
cat: /tmp/8751/mnt/bar: No such file or directory
The reason is that nfs_export depends on index feature and with index
feature enabled, an upper/work dirs cannot be reused for mounting with
a different lower layer.
To reproduce the failure do:
echo Y > /sys/module/overlay/parameters/index
echo Y > /sys/module/overlay/parameters/nfs_export
before running the test.
Fix the failure by explicitly re-creating upper/work dirs.
Reported-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
92 lines
2.1 KiB
Bash
Executable File
92 lines
2.1 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2017 Red Hat Inc. All Rights Reserved.
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#
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# FS QA Test 029
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#
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# There are dirs/files in lower dir and upper dir before
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# mounting overlayfs. After mounting, use dir in overlayfs
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# mountpoint as lowerdir to mount another overlayfs, then
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# access old files through the second overlayfs. It was
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# not working, kernel commit below fixed it.
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#
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# c4fcfc1619ea ovl: fix d_real() for stacked fs
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#
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# This reproducer was originally written by
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# Miklos Szeredi <mszeredi@redhat.com>
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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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$UMOUNT_PROG $tmp/mnt
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rm -rf $tmp
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rm -f $tmp.*
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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 $seqres.full
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs overlay
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_supported_os Linux
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_require_scratch
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# Remove all files from previous tests
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_scratch_mkfs
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# Preparing files
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upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
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lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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mkdir -p $upperdir/up
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echo foo > $upperdir/up/foo
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mkdir -p $lowerdir/low
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echo bar > $lowerdir/low/bar
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# mount overlay in SCRATCH_MNT
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_scratch_mount
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mkdir -p $tmp/{upper,mnt,work}
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# mount overlay again using upper dir from SCRATCH_MNT dir
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_overlay_mount_dirs $SCRATCH_MNT/up $tmp/{upper,work} \
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overlay $tmp/mnt
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# accessing file in the second mount
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cat $tmp/mnt/foo
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$UMOUNT_PROG $tmp/mnt
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# re-create upper/work to avoid ovl_verify_origin() mount failure
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# when index is enabled
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rm -rf $tmp/{upper,work}
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mkdir -p $tmp/{upper,work}
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# mount overlay again using lower dir from SCRATCH_MNT dir
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_overlay_mount_dirs $SCRATCH_MNT/low $tmp/{upper,work} \
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overlay $tmp/mnt
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cat $tmp/mnt/bar
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$UMOUNT_PROG $tmp/mnt
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rm -rf $tmp/{upper,work}
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mkdir -p $tmp/{upper,work}
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# mount overlay again using SCRATCH_MNT dir
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_overlay_mount_dirs $SCRATCH_MNT/ $tmp/{upper,work} \
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overlay $tmp/mnt
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cat $tmp/mnt/up/foo
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cat $tmp/mnt/low/bar
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# success, all done
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status=0
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exit
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