Re: [PATCH v2] xfs: test xfs_info on block device and mountpoint

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On Tue, Jun 25, 2019 at 03:16:39PM +0800, Zorro Lang wrote:
> On Tue, Jun 25, 2019 at 10:45:46AM +0800, Eryu Guan wrote:
> > On Mon, Jun 24, 2019 at 09:21:03AM +0800, Zorro Lang wrote:
> > > On Sun, Jun 23, 2019 at 02:49:19PM -0700, Darrick J. Wong wrote:
> > > > On Sat, Jun 22, 2019 at 11:38:27PM +0800, Zorro Lang wrote:
> > > > > There was a bug, xfs_info fails on a mounted block device:
> > > > > 
> > > > >   # xfs_info /dev/mapper/testdev
> > > > >   xfs_info: /dev/mapper/testdev contains a mounted filesystem
> > > > > 
> > > > >   fatal error -- couldn't initialize XFS library
> > > > > 
> > > > > xfsprogs has fixed it by:
> > > > > 
> > > > >   bbb43745 xfs_info: use findmnt to handle mounted block devices
> > > > > 
> > > > > Signed-off-by: Zorro Lang <zlang@xxxxxxxxxx>
> > > > 
> > > > Aha!  I remembered something -- xfs/449 already checks for consistency
> > > > in the various xfs geometry reports that each command provides, so why
> > > > not just add the $XFS_INFO_PROG $SCRATCH_DEV case at the end?
> 
> Hmm... But I hope the case can keep running xfs_info test even there're not
> xfs_spaceman -c "info" or xfs_db -c "info", just skip these two steps. Due
> to RHEL-7 has old xfsprogs, we'd like to cover bug on RHEL-7.
> 
> What do you think?

If there isn't an xfs_db -c info command then xfs_info <blockev> won't
work because that's what it does internally.

Sooo unless you're backporting the new xfs_db info command to rhel7
xfsprogs as well as the new xfs_info wrapper, the test ought to just
_notrun on rhel7.

--D

> > > 
> > > Wow, there're so many cases, can't sure what we've covered now:)
> > > 
> > > Sure, I can do this change on xfs/449, if Eryu thinks it's fine to increase
> > > the test coverage of a known case.
> > 
> > Given that we're having more and more tests and the test time grows
> > quickly, I'm fine now with adding such small & similar test to existing
> > test case to reuse the test setups, especially when XFS maintainer
> > agrees to do so :)
> > 
> > Thanks,
> > Eryu



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