Ondřej Surý 52b3d86ef0 Add a limit to the number of RR types for single name ...

Previously, the number of RR types for a single owner name was limited
only by the maximum number of the types (64k).  As the data structure
that holds the RR types for the database node is just a linked list, and
there are places where we just walk through the whole list (again and
again), adding a large number of RR types for a single owner named with
would slow down processing of such name (database node).

Add a configurable limit to cap the number of the RR types for a single
owner.  This is enforced at the database (rbtdb, qpzone, qpcache) level
and configured with new max-types-per-name configuration option that
can be configured globally, per-view and per-zone.

2024-06-10 16:55:09 +02:00

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