Instead of issuing a separate isc_task_send() call for every RBTDB node
that triggers tree pruning, maintain a list of nodes from which tree
pruning can be started from and only issue an isc_task_send() call if
pruning has not yet been triggered by another RBTDB node.
The extra queuing overhead eliminated by this change could be remotely
exploited to cause excessive memory use.
As this change modifies struct dns_rbtnode by adding a new 'prunelink'
member to it, bump MAPAPI to prevent any attempts of loading map-format
zone files created using older BIND 9 versions.
(cherry picked from commit 24381cc36d)
bump the map zonefile version number to avoid an assertion
failure when loading map files from versions of BIND prior to
the most recent change to the in-memory structure of zone
databases.
(cherry picked from commit 4a68c7be22)
"max-journal-size" is set by default to twice the size of the zone
database. however, the calculation of zone database size was flawed.
- change the size calculations in dns_db_getsize() to more accurately
represent the space needed for a journal file or *XFR message to
contain the data in the database. previously we returned the sizes
of all rdataslabs, including header overhead and offset tables,
which resulted in the database size being reported as much larger
than the equivalent journal transactions would have been.
- map files caused a particular problem here: the full name can't be
determined from the node while a file is being deserialized, because
the uppernode pointers aren't set yet. so we store "full name length"
in the dns_rbtnode structure while serializing, and clear it after
deserialization is complete.
- tidy up release notes, removing the existing "security fixes" and
"bug fixes" sections
- add a section in the release notes to discuss the new version
numbering
- update version, CHANGES, api, and mapapi files
4708. [cleanup] Legacy Windows builds (i.e. for XP and earlier)
are no longer supported. [RT #45186]
4707. [func] The lightweight resolver daemon and library (lwresd
and liblwres) have been removed. [RT #45186]
4706. [func] Code implementing name server query processing has
been moved from bin/named to a new library "libns".
Functions remaining in bin/named are now prefixed
with "named_" rather than "ns_". This will make it
easier to write unit tests for name server code, or
link name server functionality into new tools.
[RT #45186]
