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From: Marc MERLIN <marc@merlins.org>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: How to delete/rewrite a corrupted file in a read only snapshot?
Date: Wed, 7 Feb 2024 13:25:03 -0800	[thread overview]
Message-ID: <ZcP1L5SUXNrB_sp_@merlins.org> (raw)
In-Reply-To: <07bc2e91-0106-48ab-b07d-f54b75e9a991@gmx.com>

On Wed, Feb 07, 2024 at 03:37:04PM +1030, Qu Wenruo wrote:
> > can I either
> > 1) force delete it with some admin tool
> 
> That would break any later incremental receive.
> 
> > 2) even better force/overwrite it with the correct file from source?
> 
> That's possible manually.

If I change the snapshot to readwrite, and cat the good file into the
corrupted one 
cat good > /path/to/bad
will that work, or will that allocate new COW blocks and do weird things
that would break later brfs send/receive?

Thanks,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/                       | PGP 7F55D5F27AAF9D08

  reply	other threads:[~2024-02-07 21:24 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-06 19:12 How to delete/rewrite a corrupted file in a read only snapshot? Marc MERLIN
2024-02-06 19:29 ` Holger Hoffstätte
2024-02-07  3:56   ` Andrei Borzenkov
2024-02-07  5:07 ` Qu Wenruo
2024-02-07 21:25   ` Marc MERLIN [this message]
2024-02-07 21:30     ` Qu Wenruo

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