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Add a limit to the number of RR types for single name

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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.

(cherry picked from commit 00d16211d6368b99f070c1182d8c76b3798ca1db)
This commit is contained in:
Ondřej Surý
2024-05-25 11:46:56 +02:00
committed by Nicki Křížek
parent 197b08009d
commit 39d3e2a8ec
25 changed files with 163 additions and 6 deletions
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doc/misc/static-stub.zoneopt
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@@ -6,6 +6,7 @@ zone <string> [ <class> ] {
forwarders [ port <integer> ] { ( <ipv4_address> | <ipv6_address> ) [ port <integer> ]; ... };
max-records <integer>;
max-records-per-type <integer>;
max-types-per-name <integer>;
server-addresses { ( <ipv4_address> | <ipv6_address> ); ... };
server-names { <string>; ... };
zone-statistics ( full | terse | none | <boolean> );