Shrink filesystem

[hockdudu]

I've seen the documentation states that shrinking isn't supported¹, but I couldn't find any issue tracking this feature (is it planned?), so I'm creating this issue here.

Is this a limitation on bcachefs itself, or only on the userspace tools?

Footnotes

1. https://bcachefs-docs.readthedocs.io/en/latest/mgmt-fsresize.html ↩

[phedders]

+1 very much looking forward to this being possible. (Sign of a grown up FS for me, looking at you XFS... )

[matthiasgoergens]

The problem is that shrinking needs to move data around on disk, while extending just needs a change to the metadata.

From what I can tell, shrinking is definitely possible, it's just a lot of work to implement.