RE: [PATCH] ext4: Fix possible corruption when moving a directory with RENAME_EXCHANGE

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From: Jan Kara
> Sent: 24 May 2023 15:19
....
> Right, so this case indeed looks possible and I didn't think about it.
> Thanks for spotting this! Let me try to persuade Al again to do the
> necessary locking in VFS as it is getting really hairy and needs VFS
> changes anyway.

I think it was NetBSD that started using a global lock for
non-trival renames because otherwise it is all 'just too hard'.

	David

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