Re: [PATCH 00/13] cross rename v4

[J. R. Okajima]

Miklos Szeredi:
> As Linus' suggestion, a whiteout is represented as a dummy char device.
> This patch uses the 0/0 device number, but the actual number doesn't matter
> as long as it doesn't conflict with a real device.

I have no objection about the char device.
But why do we need an inode for every whiteout? I'd suggest making a
hardlink. For some filesystems which don't support hardlinks, we have to
consume an inode per whiteout. But when the fs supports hardlinks, we
can re-use the inode and consume a few inodes only.


J. R. Okajima
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