Zach Brown 5651d48c18 scoutfs: add core btree functionality ...

Previously we had stubbed out the btree item API with static inlines.
Those are replaced with real functions in a reasonably functional btree
implementation.

The btree implementation itself is pretty straight forward.  Operations
are performed top-down and we dirty, lock, and split/merge blocks as we
go.  Callers are given a cursor to give them full access to the item.
Items in the btree blocks are stored in a treap.  There are a lot of
comments in the code to help make things clear.

We add the notion of block references and some block functions for
reading and dirtying blocks by reference.

This passes tests up to the point where unmount tries to write out data
and the world catches fire.  That's far enough to commit what we have
and iterate from there.

Signed-off-by: Zach Brown <zab@versity.com>

2016-04-12 19:33:09 -07:00

kmod

scoutfs: add core btree functionality

2016-04-12 19:33:09 -07:00

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