Re: [PATCH v2 2/5] common/rc: add recreation support for tmpfs

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On Tue, Jul 2, 2024 at 12:36 AM Darrick J. Wong <djwong@xxxxxxxxxx> wrote:
>
> On Sun, Jun 30, 2024 at 11:52:41PM +0200, Daniel Gomez via B4 Relay wrote:
> > From: Daniel Gomez <da.gomez@xxxxxxxxxxx>
> >
> > Add support for test device recreation (RECREATE_TEST_DEV=true) for
> > tmpfs.
> >
> > Signed-off-by: Daniel Gomez <da.gomez@xxxxxxxxxxx>
> > ---
> >  common/rc | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/common/rc b/common/rc
> > index 163041fea..51827119c 100644
> > --- a/common/rc
> > +++ b/common/rc
> > @@ -604,6 +604,9 @@ _test_mkfs()
> >      pvfs2)
> >       # do nothing for pvfs2
> >       ;;
> > +     tmpfs)
>
> Indentation problem here.

What's actually the format for indentation in bash scripts across
xfstests-dev project? I see a mix of tabs and spaces everywhere. For
this particular _test_mkfs(), I see:
<spaces>overlay)
<tabs># do nothing for overlay
<tabs>;;
<spaces>pvfs2)
<tabs># do nothing for pvfs2
<tabs>;;
<spaces>udf)
<spaces><spaces>$MKFS_UDF_PROG ...
<tabs>;;
<spaces>btrfs)
<spaces><spaces>$MKFS_BTRFS_PROG...



>
> > +     # do nothing for tmpfs
>
> If we're recreating the test filesystem, shouldn't that unmount and
> remount for tmpfs?  Or at least rm -rf everything underneath it?  That's
> generally the effect of _test_mkfs for disk filesystems.

I thought this was already supported. When I enable recreation, I get
the following error:

./check -s tmpfs_huge_always -R xunit generic/003
SECTION       -- tmpfs_huge_always
RECREATING    -- tmpfs on /media/test
our local _test_mkfs routine ...
mkfs: failed to execute mkfs.tmpfs: No such file or directory
check: failed to mkfs $TEST_DEV using specified options
Interrupted!
Interrupted!
Passed all 0 tests
Xunit report: /result.xml
SECTION       -- tmpfs_huge_always
=========================
Passed all 0 tests

So, adding the tmpfs) case to _test_mkfs() just lets recreation go
through, and mount and umount when the test is finished. I'm not sure
if I'm missing something or maybe I should rename this patch as a fix?

>
> (That said, I'm much less familiar with non-disk filesystems...)

When umounting a tmpfs mount dir, data is lost. So in the recreation
case, _test_unmount() would take care of that.

>
> --D
>
> > +     ;;
> >      udf)
> >          $MKFS_UDF_PROG $MKFS_OPTIONS $* $TEST_DEV > /dev/null
> >       ;;
> >
> > --
> > 2.43.0
> >
> >
> >





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