On Mon, Jul 13, 2020 at 01:46:39PM -0700, Boris Burkov wrote:
> Test if dirtying many inodes (which can delay umount) then
> unmounting and quickly mounting again causes the mount to fail.
>
> A race, which breaks the test in btrfs, is fixed by the patch:
> "btrfs: fix mount failure caused by race with umount"
>
> Signed-off-by: Boris Burkov <boris@xxxxxx>
> ---
> tests/generic/603 | 53 +++++++++++++++++++++++++++++++++++++++++++
> tests/generic/603.out | 2 ++
> tests/generic/group | 1 +
> 3 files changed, 56 insertions(+)
> create mode 100755 tests/generic/603
> create mode 100644 tests/generic/603.out
>
> diff --git a/tests/generic/603 b/tests/generic/603
> new file mode 100755
> index 00000000..8e9a80e6
> --- /dev/null
> +++ b/tests/generic/603
> @@ -0,0 +1,53 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2020 Facebook All Rights Reserved.
> +#
> +# FS QA Test 603
> +#
> +# Evicting dirty inodes can take a long time during umount.
> +# Check that a new mount racing with such a delayed umount succeeds.
> +#
> +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
> +
> +# Modify as appropriate.
> +_supported_fs generic
> +_supported_os Linux
> +_require_scratch
Ah, it's fixed in v3, so ignore my first comment in the reply to v2 :)
Thanks,
Eryu
> +
> +_scratch_mkfs > /dev/null 2>&1
> +_scratch_mount
> +for i in $(seq 0 500)
> +do
> + dd if=/dev/zero of="$SCRATCH_MNT/$i" bs=1M count=1 > /dev/null 2>&1
> +done
> +_scratch_unmount &
> +_scratch_mount
> +wait
> +
> +echo "Silence is golden"
> +
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/generic/603.out b/tests/generic/603.out
> new file mode 100644
> index 00000000..6810da89
> --- /dev/null
> +++ b/tests/generic/603.out
> @@ -0,0 +1,2 @@
> +QA output created by 603
> +Silence is golden
> diff --git a/tests/generic/group b/tests/generic/group
> index d9ab9a31..c0ace35b 100644
> --- a/tests/generic/group
> +++ b/tests/generic/group
> @@ -605,3 +605,4 @@
> 600 auto quick quota
> 601 auto quick quota
> 602 auto quick encrypt
> +603 auto quick
> --
> 2.24.1
