The ZAP code is mixed up across a few files without clear separation of
concerns. This splits it out from three source files to five:
- zap.c: the bulk of the "public" interface
- zap_impl.c: internals shared across all backends
- zap_micro.c: microzap backend
- zap_fat.c: fatzap backend: core logic
- zap_leaf.c: fatzap backend: leaf blocks
Note that this doesn't not change any code, just moves functions around.
Also note that right now the microzap and fatzap backends know more
about each other than is healthy. This change is simply marking out
where different things should live in the end, to make it easier for
that refactoring work to begin.
Sponsored-by: TrueNAS
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Akash B <akash-b@hpe.com>
Signed-off-by: Rob Norris <rob.norris@truenas.com>
Closes#18516
Rob Norris