mm/damon/sysfs-schemes: record filters of which layer should be added to the...

mm/damon/sysfs-schemes: record filters of which layer should be added to the given filters directory

Unlike their name and assumed purposes, {core,ops}_filters DAMOS sysfs
directories are allowing installing any type of filters.  As a first step
for preventing such wrong installments, add information about filters that
handled by what layer should the installed to the given filters directory
in the DAMOS sysfs internal data structures.

Link: https://lkml.kernel.org/r/20250305222733.59089-6-sj@kernel.org


Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>