Re: [PATCH 2/3] overlay/036: filter busy mount message

[Amir Goldstein <amir73il@gmail.com>]

On Tue, Nov 14, 2017 at 12:54 PM, Eryu Guan <eguan@redhat.com> wrote:
> util-linux v2.30 changed error message of a busy mount and caused
> overlay/036 to fail. e.g.
>
>  - mount: <device> is already mounted or <mountpoint> busy
>  + mount: <mountpoint>: <device> already mounted or mount point busy.
>
> Filter the mount output by a newly introduced _filter_busy_mount
> into a unified format.
>
> Signed-off-by: Eryu Guan <eguan@redhat.com>
> ---
>  common/filter         | 12 ++++++++++++
>  tests/overlay/036     |  9 +++++++--
>  tests/overlay/036.out |  4 ++--
>  3 files changed, 21 insertions(+), 4 deletions(-)
>
> diff --git a/common/filter b/common/filter
> index d1bb94818e3d..b1cd558ab0e1 100644
> --- a/common/filter
> +++ b/common/filter
> @@ -420,6 +420,18 @@ _filter_error_mount()
>         sed -e "s/mount:\(.*failed:\)/mount:/" | _filter_ending_dot
>  }
>
> +# Similar to _filter_error_mount, filter a busy mount output.
> +# Turn both old (prior to util-linux v2.30) and new (v2.30 and later) format to
> +# a simple one. e.g.
> +# old: mount: <device> is already mounted or <mountpoint> busy
> +# new: mount: <mountpoint>: <device> already mounted or mount point busy.
> +# filtered: mount: <device> already mounted or mount point busy
> +_filter_busy_mount()
> +{
> +       sed -e "s/.*: \([^ ]*\).* already mounted.*busy/mount: \1 already mounted or mount point busy/" | \
> +               _filter_ending_dot
> +}
> +
>  _filter_od()
>  {
>         BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT)
> diff --git a/tests/overlay/036 b/tests/overlay/036
> index 544d4e4eaa87..4c4b56ff9817 100755
> --- a/tests/overlay/036
> +++ b/tests/overlay/036
> @@ -63,6 +63,11 @@ _cleanup()
>  . ./common/rc
>  . ./common/filter
>
> +filter_mount()
> +{
> +       _filter_scratch | _filter_busy_mount

This is referring to scratch, so filter_scratch_mount()??

> +}
> +
>  # remove previous $seqres.full before test
>  rm -f $seqres.full
>
> @@ -103,12 +108,12 @@ _overlay_mount_dirs $lowerdir2 $upperdir2 $workdir \
>  # Try to mount another overlay with the same upperdir
>  # with index=on - expect EBUSY
>  _overlay_mount_dirs $lowerdir2 $upperdir $workdir2 \
> -                   overlay2 $SCRATCH_MNT -oindex=on 2>&1 | _filter_scratch
> +                   overlay2 $SCRATCH_MNT -oindex=on 2>&1 | filter_mount
>
>  # Try to mount another overlay with the same workdir
>  # with index=on - expect EBUSY
>  _overlay_mount_dirs $lowerdir2 $upperdir2 $workdir \
> -                   overlay3 $SCRATCH_MNT -oindex=on 2>&1 | _filter_scratch
> +                   overlay3 $SCRATCH_MNT -oindex=on 2>&1 | filter_mount
>
>
>  # success, all done
> diff --git a/tests/overlay/036.out b/tests/overlay/036.out
> index 51746114db1c..fbe224e1bac7 100644
> --- a/tests/overlay/036.out
> +++ b/tests/overlay/036.out
> @@ -1,3 +1,3 @@
>  QA output created by 036
> -mount: overlay2 is already mounted or SCRATCH_MNT busy
> -mount: overlay3 is already mounted or SCRATCH_MNT busy
> +mount: overlay2 already mounted or mount point busy
> +mount: overlay3 already mounted or mount point busy
> --
> 2.13.6
>
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