Re: UBIFS quota support

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

FYI, the main reason (well, besides history) that XFS uses its own
quota code is so that it can have full integration with the transaction
subsystem and the on-disk data structures.

While it is going to be a lot more code you might want to look into
implementing quota accounting in ubifs itself and only use the
standard interfaces to report and adminstrate the quota values.

That way you might not even have to maintain a separate quota file and
could instead maintain usage statistics in the btree nodes, and only
summarize them in memory, possibly with a periodical full state dump.

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