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bind9/lib/dns/Makefile.am
Tony Finch 6b9ddbd1ce Add a qp-trie data structure 
A qp-trie is a kind of radix tree that is particularly well-suited to
DNS servers. I invented the qp-trie in 2015, based on Dan Bernstein's
crit-bit trees and Phil Bagwell's HAMT. https://dotat.at/prog/qp/

This code incorporates some new ideas that I prototyped using
NLnet Labs NSD in 2020 (optimizations for DNS names as keys)
and 2021 (custom allocator and garbage collector).
https://dotat.at/cgi/git/nsd.git

The BIND version of my qp-trie code has a number of improvements
compared to the prototype developed for NSD.

  * The main omission in the prototype was the very sketchy outline of
    how locking might work. Now the locking has been implemented,
    using a reader/writer lock and a mutex. However, it is designed to
    benefit from liburcu if that is available.

  * The prototype was designed for two-version concurrency, one
    version for readers and one for the writer. The new code supports
    multiversion concurrency, to provide a basis for BIND's dbversion
    machinery, so that updates are not blocked by long-running zone
    transfers.

  * There are now two kinds of transaction that modify the trie: an
    `update` aims to support many very small zones without wasting
    memory; a `write` avoids unnecessary allocation to help the
    performance of many small changes to the cache.

  * There is also a single-threaded interface for situations where
    concurrent access is not necessary.

  * The API makes better use of types to make it more clear which
    operations are permitted when.

  * The lookup table used to convert a DNS name to a qp-trie key is
    now initialized by a run-time constructor instead of a programmer
    using copy-and-paste. Key conversion is more flexible, so the
    qp-trie can be used with keys other than DNS names.

  * There has been much refactoring and re-arranging things to improve
    the terminology and order of presentation in the code, and the
    internal documentation has been moved from a comment into a file
    of its own.

Some of the required functionality has been stripped out, to be
brought back later after the basics are known to work.

  * Garbage collector performance statistics are missing.

  * Fancy searches are missing, such as longest match and
    nearest match.

  * Iteration is missing.

  * Search for update is missing, for cases where the caller needs to
    know if the value object is mutable or not.
2023-02-27 13:47:25 +00:00

328 lines
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Makefile
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include $(top_srcdir)/Makefile.top
lib_LTLIBRARIES = libdns.la
nodist_libdns_ladir = $(includedir)/dns
nodist_libdns_la_HEADERS = \
include/dns/enumclass.h \
include/dns/enumtype.h \
include/dns/rdatastruct.h
nodist_libdns_la_SOURCES = \
$(nodist_libdns_la_HEADERS) \
code.h
BUILT_SOURCES = \
$(nodist_libdns_la_SOURCES)
CLEANFILES = \
$(nodist_libdns_la_SOURCES) \
gen$(BUILD_EXEEXT)
gen$(BUILD_EXEEXT): gen.c
$(CC_FOR_BUILD) -g -I. $(srcdir)/gen.c -o $@
EXTRA_DIST = \
dnstap.proto \
gen.c \
rdata/*
include/dns/enumtype.h: gen Makefile
mkdir -p include/dns
$(builddir)/gen -s $(srcdir) -t > $@
include/dns/enumclass.h: gen Makefile
mkdir -p include/dns
$(builddir)/gen -s $(srcdir) -c > $@
include/dns/rdatastruct.h: gen rdata/rdatastructpre.h rdata/rdatastructsuf.h Makefile
mkdir -p include/dns
$(builddir)/gen -s $(srcdir) -i \
-P $(srcdir)/rdata/rdatastructpre.h \
-S $(srcdir)/rdata/rdatastructsuf.h > $@
code.h: gen Makefile
$(builddir)/gen -s $(srcdir) > $@
libdns_ladir = $(includedir)/dns
libdns_la_HEADERS = \
include/dns/acl.h \
include/dns/adb.h \
include/dns/badcache.h \
include/dns/bit.h \
include/dns/byaddr.h \
include/dns/cache.h \
include/dns/callbacks.h \
include/dns/catz.h \
include/dns/cert.h \
include/dns/client.h \
include/dns/clientinfo.h \
include/dns/compress.h \
include/dns/db.h \
include/dns/dbiterator.h \
include/dns/diff.h \
include/dns/dispatch.h \
include/dns/dlz.h \
include/dns/dlz_dlopen.h \
include/dns/dns64.h \
include/dns/dnsrps.h \
include/dns/dnssec.h \
include/dns/ds.h \
include/dns/dsdigest.h \
include/dns/dnstap.h \
include/dns/dyndb.h \
include/dns/ecs.h \
include/dns/edns.h \
include/dns/fixedname.h \
include/dns/forward.h \
include/dns/geoip.h \
include/dns/ipkeylist.h \
include/dns/iptable.h \
include/dns/journal.h \
include/dns/kasp.h \
include/dns/keydata.h \
include/dns/keyflags.h \
include/dns/keymgr.h \
include/dns/keytable.h \
include/dns/keyvalues.h \
include/dns/librpz.h \
include/dns/log.h \
include/dns/master.h \
include/dns/masterdump.h \
include/dns/message.h \
include/dns/name.h \
include/dns/ncache.h \
include/dns/nsec.h \
include/dns/nsec3.h \
include/dns/nta.h \
include/dns/opcode.h \
include/dns/order.h \
include/dns/peer.h \
include/dns/private.h \
include/dns/qp.h \
include/dns/rbt.h \
include/dns/rcode.h \
include/dns/rdata.h \
include/dns/rdataclass.h \
include/dns/rdatalist.h \
include/dns/rdataset.h \
include/dns/rdatasetiter.h \
include/dns/rdataslab.h \
include/dns/rdatatype.h \
include/dns/remote.h \
include/dns/request.h \
include/dns/resolver.h \
include/dns/result.h \
include/dns/rootns.h \
include/dns/rpz.h \
include/dns/rriterator.h \
include/dns/rrl.h \
include/dns/sdlz.h \
include/dns/secalg.h \
include/dns/secproto.h \
include/dns/soa.h \
include/dns/ssu.h \
include/dns/stats.h \
include/dns/time.h \
include/dns/transport.h \
include/dns/tkey.h \
include/dns/tsig.h \
include/dns/ttl.h \
include/dns/types.h \
include/dns/update.h \
include/dns/validator.h \
include/dns/view.h \
include/dns/xfrin.h \
include/dns/zone.h \
include/dns/zonekey.h \
include/dns/zoneverify.h \
include/dns/zt.h
dstdir = $(includedir)/dst
dst_HEADERS = \
include/dst/dst.h \
include/dst/gssapi.h
irsdir = $(includedir)/irs
irs_HEADERS = \
include/irs/resconf.h
libdns_la_SOURCES = \
$(libdns_la_HEADERS) \
$(dst_HEADERS) \
$(irs_HEADERS) \
acl.c \
adb.c \
badcache.c \
byaddr.c \
cache.c \
callbacks.c \
catz.c \
client.c \
clientinfo.c \
compress.c \
db.c \
dbiterator.c \
diff.c \
dispatch.c \
dlz.c \
dns64.c \
dnsrps.c \
dnssec.c \
ds.c \
dst_api.c \
dst_internal.h \
dst_openssl.h \
dst_parse.c \
dst_parse.h \
dyndb.c \
ecs.c \
fixedname.c \
forward.c \
gssapictx.c \
hmac_link.c \
ipkeylist.c \
iptable.c \
journal.c \
kasp.c \
key.c \
keydata.c \
keymgr.c \
keytable.c \
log.c \
master.c \
masterdump.c \
message.c \
name.c \
ncache.c \
nsec.c \
nsec3.c \
nta.c \
openssl_link.c \
openssl_shim.c \
openssl_shim.h \
openssldh_link.c \
opensslecdsa_link.c \
openssleddsa_link.c \
opensslrsa_link.c \
order.c \
peer.c \
private.c \
qp.c \
qp_p.h \
rbt.c \
rbtdb.h \
rbtdb.c \
rcode.c \
rdata.c \
rdatalist.c \
rdataset.c \
rdatasetiter.c \
rdataslab.c \
remote.c \
request.c \
resconf.c \
resolver.c \
result.c \
rootns.c \
rpz.c \
rrl.c \
rriterator.c \
sdlz.c \
soa.c \
ssu.c \
ssu_external.c \
stats.c \
time.c \
transport.c \
tkey.c \
tsig.c \
tsig_p.h \
ttl.c \
update.c \
validator.c \
view.c \
xfrin.c \
zone.c \
zone_p.h \
zoneverify.c \
zonekey.c \
zt.c
if HAVE_GSSAPI
libdns_la_SOURCES += \
gssapi_link.c
endif
if HAVE_GEOIP2
libdns_la_SOURCES += \
geoip2.c
endif
libdns_la_CPPFLAGS = \
$(AM_CPPFLAGS) \
$(LIBDNS_CFLAGS) \
$(LIBISC_CFLAGS) \
$(LIBUV_CFLAGS) \
$(OPENSSL_CFLAGS)
libdns_la_LDFLAGS = \
$(AM_LDFLAGS) \
-release "$(PACKAGE_VERSION)"
libdns_la_LIBADD = \
$(LIBISC_LIBS) \
$(LIBUV_LIBS) \
$(OPENSSL_LIBS)
if HAVE_JSON_C
libdns_la_CPPFLAGS += \
$(JSON_C_CFLAGS)
libdns_la_LIBADD += \
$(JSON_C_LIBS)
endif HAVE_JSON_C
if HAVE_LIBXML2
libdns_la_CPPFLAGS += \
$(LIBXML2_CFLAGS)
libdns_la_LIBADD += \
$(LIBXML2_LIBS)
endif HAVE_LIBXML2
if HAVE_GSSAPI
libdns_la_CPPFLAGS += \
$(GSSAPI_CFLAGS) \
$(KRB5_CFLAGS)
libdns_la_LIBADD += \
$(GSSAPI_LIBS) \
$(KRB5_LIBS)
endif
if HAVE_GEOIP2
libdns_la_CPPFLAGS += \
$(MAXMINDDB_CFLAGS)
libdns_la_LIBADD += \
$(MAXMINDDB_LIBS)
endif
if HAVE_DNSTAP
nodist_libdns_la_SOURCES += \
dnstap.pb-c.h \
dnstap.pb-c.c
libdns_la_SOURCES += \
dnstap.c
dnstap.pb-c.h dnstap.pb-c.c: dnstap.proto
$(PROTOC_C) --proto_path=$(srcdir) --c_out=. dnstap.proto
libdns_la_CPPFLAGS += $(DNSTAP_CFLAGS)
libdns_la_LIBADD += $(DNSTAP_LIBS)
endif
if HAVE_LMDB
libdns_la_CPPFLAGS += $(LMDB_CFLAGS)
libdns_la_LIBADD += $(LMDB_LIBS)
endif
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