Re: [PATCH 09/10] xfs_repair: add a testing hook for NEEDSREPAIR

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On Wed, Feb 10, 2021 at 03:41:52PM -0600, Eric Sandeen wrote:
> On 2/9/21 1:59 PM, Darrick J. Wong wrote:
> >> # ./repair/xfs_repair -c needsrepair=1 /dev/test/scratch 
> >> Phase 1 - find and verify superblock...
> >> Marking filesystem in need of repair.
> >> writing modified primary superblock
> >> Phase 2 - using internal log
> >>         - zero log...
> >> ERROR: The filesystem has valuable metadata changes in a log which needs to
> >> ...
> >> # mount /dev/test/scratch /mnt/
> >> mount: /mnt: wrong fs type, bad option, bad superblock on /dev/mapper/test-scratch, missing codepage or helper program, or other error.
> >> #
> >>
> >> It looks like we can set a feature upgrade bit on the superblock before
> >> we've examined the log and potentially discovered that it's dirty (phase
> >> 2). If the log is recoverable, that puts the user in a bit of a bind..
> > Heh, funny that I was thinking that the upgrades shouldn't really be
> > happening in phase 1 anyway--
> > 
> > I've (separately) started working on a patch to make it so that you can
> > add reflink and finobt to a filesystem.  Those upgrades require somewhat
> > more intensive checks of the filesystem (such as checking free space in
> > each AG), so I ended up dumping them into phase 2, since the xfs_mount
> > and buffer cache aren't fully initialized until after phase 1.
> > 
> > So, yeah, the upgrade code should move to phase2() after log zeroing and
> > before the AG scan.
> 
> Oh, whoops - 
> 
> based on this, I think that the prior patch
> [PATCH 08/10] xfs_repair: allow setting the needsrepair flag
> needs to be adjusted as well, right; we don't want to set it in phase 1
> or we might set it then abort on a dirty log and the user is stuck.
> 
> So maybe I should merge up through 
> 
> [PATCH 07/10] xfs_repair: set NEEDSREPAIR when we deliberately corrupt directories
> 
> and hold off on the rest? Or should I just hold off on the series and let
> you reassemble (again?)

Yeah, I'll push out v5 tomorrow morning with all this cleaned up.

--D

> (Am I right that the upgrade bits will need to be moved and the series resent?)
> 
> -Eric



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