Re: [PATCH v2] generic/728: Add a test for xattr ctime updates

[Anna Schumaker <anna@kernel.org>]

On Wed, May 10, 2023 at 8:45 AM Zorro Lang <zlang@redhat.com> wrote:
>
> On Fri, May 05, 2023 at 01:24:27PM -0400, Anna Schumaker wrote:
> > From: Anna Schumaker <Anna.Schumaker@Netapp.com>
> >
> > The NFS client wasn't updating ctime after a setxattr request. This is a
> > test written while fixing the bug.
> >
> > Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
> >
> > ---
> > v2:
> >  - Move test to generic/
> >  - Address comments from the mailing list
> > ---
> >  tests/generic/728     | 42 ++++++++++++++++++++++++++++++++++++++++++
> >  tests/generic/728.out |  2 ++
> >  2 files changed, 44 insertions(+)
> >  create mode 100755 tests/generic/728
> >  create mode 100644 tests/generic/728.out
> >
> > diff --git a/tests/generic/728 b/tests/generic/728
> > new file mode 100755
> > index 000000000000..ab2414c151db
> > --- /dev/null
> > +++ b/tests/generic/728
> > @@ -0,0 +1,42 @@
> > +#! /bin/bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Copyright (c) 2023 Netapp Inc., All Rights Reserved.
> > +#
> > +# FS QA Test 728
> > +#
> > +# Test a bug where the NFS client wasn't sending a post-op GETATTR to the
> > +# server after setting an xattr, resulting in `stat` reporting a stale ctime.
> > +#
> > +. ./common/preamble
> > +_begin_fstest auto quick attr
> > +
> > +# Import common functions
> > +. ./common/attr
> > +
> > +# real QA test starts here
> > +_supported_fs generic
> > +_require_test
> > +_require_attrs
> > +
> > +rm -rf $TEST_DIR/testfile
> > +touch $TEST_DIR/testfile
> > +
> > +
> > +_check_xattr_op()
> > +{
> > +  what=$1
> > +  shift 1
> > +
> > +  before_ctime=$(stat -c %z $TEST_DIR/testfile)
> > +  $SETFATTR_PROG $* $TEST_DIR/testfile
>
> Hi Anna,
>
> If there's not objection from you, I'll add below codes at here, and merge
> this case in next fstests release:

Yeah, no objection from me. Sorry I haven't had a chance to get around
to the change this week, I've been doing LSF.

>
> +       # There might be filesystem's timestamp granularity, so sleep 2 seconds
> +       # for most filesystems can capture a different timestamp across a
> +       # setxattr operation
> +       sleep 2s
>
> BTW, is there a known git commit which fix the issue of this case trying to
> test?

Not yet, but there will be soon. Those patches are still in review and
might need minor fixups. Can the git commit be added once they're
ready?

Anna

>
> Thanks,
> Zorro
>
> > +  after_ctime=$(stat -c %z $TEST_DIR/testfile)
> > +
> > +  test "$before_ctime" != "$after_ctime" || echo "Expected ctime to change after $what."
> > +}
> > +
> > +_check_xattr_op setxattr -n user.foobar -v 123
> > +_check_xattr_op removexattr -x user.foobar
> > +
> > +echo "Silence is golden"
> > +status=0
> > +exit
> > diff --git a/tests/generic/728.out b/tests/generic/728.out
> > new file mode 100644
> > index 000000000000..ab39f45fe5da
> > --- /dev/null
> > +++ b/tests/generic/728.out
> > @@ -0,0 +1,2 @@
> > +QA output created by 728
> > +Silence is golden
> > --
> > 2.40.1
> >
>