[fuse] How to trigger writeback?

[Nikolaus Rath <Nikolaus@xxxxxxxx>]

Hi,

How do I trigger writeback from a (writeback-cache enabled) FUSE
filesystem?

Background: I am emulating the reflink ioctl with a magic xattr, but for
that to work the filesystem needs to have all the data that is supposed
to be in the copied file.


Best,
Nikolaus

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