Update BIND to version 9.6.1rc1. This version has better performance and

lots of new features compared to 9.4.x, including:

	Full NSEC3 support
	Automatic zone re-signing
	New update-policy methods tcp-self and 6to4-self
	DHCID support.
	More detailed statistics counters including those supported in BIND 8.
	Faster ACL processing.
	Efficient LRU cache-cleaning mechanism.
	NSID support.

1 files changed, 350 insertions, 3 deletions

diff --git a/contrib/bind9/lib/dns/stats.c b/contrib/bind9/lib/dns/stats.c
index 660046f..60fed35 100644
--- a/contrib/bind9/lib/dns/stats.c
+++ b/contrib/bind9/lib/dns/stats.c
@@ -1,8 +1,8 @@
 /*
- * Copyright (C) 2004, 2005  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004, 2005, 2007-2009  Internet Systems Consortium, Inc. ("ISC")
  * Copyright (C) 2000, 2001  Internet Software Consortium.
  *
- * Permission to use, copy, modify, and distribute this software for any
+ * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
@@ -15,16 +15,363 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: stats.c,v 1.6.18.4 2005/06/27 00:20:02 marka Exp $ */
+/* $Id: stats.c,v 1.16.118.2 2009/01/29 23:47:44 tbox Exp $ */
 
 /*! \file */
 
 #include <config.h>
 
+#include <isc/magic.h>
 #include <isc/mem.h>
+#include <isc/stats.h>
+#include <isc/util.h>
 
+#include <dns/opcode.h>
+#include <dns/rdatatype.h>
 #include <dns/stats.h>
 
+#define DNS_STATS_MAGIC			ISC_MAGIC('D', 's', 't', 't')
+#define DNS_STATS_VALID(x)		ISC_MAGIC_VALID(x, DNS_STATS_MAGIC)
+
+/*%
+ * Statistics types.
+ */
+typedef enum {
+	dns_statstype_general = 0,
+	dns_statstype_rdtype = 1,
+	dns_statstype_rdataset = 2,
+	dns_statstype_opcode = 3
+} dns_statstype_t;
+
+/*%
+ * It doesn't make sense to have 2^16 counters for all possible types since
+ * most of them won't be used.  We have counters for the first 256 types and
+ * those explicitly supported in the rdata implementation.
+ * XXXJT: this introduces tight coupling with the rdata implementation.
+ * Ideally, we should have rdata handle this type of details.
+ */
+enum {
+	/* For 0-255, we use the rdtype value as counter indices */
+	rdtypecounter_dlv = 256,	/* for dns_rdatatype_dlv */
+	rdtypecounter_others = 257,	/* anything else */
+	rdtypecounter_max = 258,
+	/* The following are used for rdataset */
+	rdtypenxcounter_max = rdtypecounter_max * 2,
+	rdtypecounter_nxdomain = rdtypenxcounter_max,
+	rdatasettypecounter_max = rdtypecounter_nxdomain + 1
+};
+
+struct dns_stats {
+	/*% Unlocked */
+	unsigned int	magic;
+	dns_statstype_t	type;
+	isc_mem_t	*mctx;
+	isc_mutex_t	lock;
+	isc_stats_t	*counters;
+
+	/*%  Locked by lock */
+	unsigned int	references;
+};
+
+typedef struct rdatadumparg {
+	dns_rdatatypestats_dumper_t	fn;
+	void				*arg;
+} rdatadumparg_t;
+
+typedef struct opcodedumparg {
+	dns_opcodestats_dumper_t	fn;
+	void				*arg;
+} opcodedumparg_t;
+
+void
+dns_stats_attach(dns_stats_t *stats, dns_stats_t **statsp) {
+	REQUIRE(DNS_STATS_VALID(stats));
+	REQUIRE(statsp != NULL && *statsp == NULL);
+
+	LOCK(&stats->lock);
+	stats->references++;
+	UNLOCK(&stats->lock);
+
+	*statsp = stats;
+}
+
+void
+dns_stats_detach(dns_stats_t **statsp) {
+	dns_stats_t *stats;
+
+	REQUIRE(statsp != NULL && DNS_STATS_VALID(*statsp));
+
+	stats = *statsp;
+	*statsp = NULL;
+
+	LOCK(&stats->lock);
+	stats->references--;
+	UNLOCK(&stats->lock);
+
+	if (stats->references == 0) {
+		isc_stats_detach(&stats->counters);
+		DESTROYLOCK(&stats->lock);
+		isc_mem_putanddetach(&stats->mctx, stats, sizeof(*stats));
+	}
+}
+
+/*%
+ * Create methods
+ */
+static isc_result_t
+create_stats(isc_mem_t *mctx, dns_statstype_t	type, int ncounters,
+	     dns_stats_t **statsp)
+{
+	dns_stats_t *stats;
+	isc_result_t result;
+
+	stats = isc_mem_get(mctx, sizeof(*stats));
+	if (stats == NULL)
+		return (ISC_R_NOMEMORY);
+
+	stats->counters = NULL;
+	stats->references = 1;
+
+	result = isc_mutex_init(&stats->lock);
+	if (result != ISC_R_SUCCESS)
+		goto clean_stats;
+
+	result = isc_stats_create(mctx, &stats->counters, ncounters);
+	if (result != ISC_R_SUCCESS)
+		goto clean_mutex;
+
+	stats->magic = DNS_STATS_MAGIC;
+	stats->type = type;
+	stats->mctx = NULL;
+	isc_mem_attach(mctx, &stats->mctx);
+	*statsp = stats;
+
+	return (ISC_R_SUCCESS);
+
+  clean_mutex:
+	DESTROYLOCK(&stats->lock);
+  clean_stats:
+	isc_mem_put(mctx, stats, sizeof(*stats));
+
+	return (result);
+}
+
+isc_result_t
+dns_generalstats_create(isc_mem_t *mctx, dns_stats_t **statsp, int ncounters) {
+	REQUIRE(statsp != NULL && *statsp == NULL);
+
+	return (create_stats(mctx, dns_statstype_general, ncounters, statsp));
+}
+
+isc_result_t
+dns_rdatatypestats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
+	REQUIRE(statsp != NULL && *statsp == NULL);
+
+	return (create_stats(mctx, dns_statstype_rdtype, rdtypecounter_max,
+			     statsp));
+}
+
+isc_result_t
+dns_rdatasetstats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
+	REQUIRE(statsp != NULL && *statsp == NULL);
+
+	return (create_stats(mctx, dns_statstype_rdataset,
+			     (rdtypecounter_max * 2) + 1, statsp));
+}
+
+isc_result_t
+dns_opcodestats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
+	REQUIRE(statsp != NULL && *statsp == NULL);
+
+	return (create_stats(mctx, dns_statstype_opcode, 16, statsp));
+}
+
+/*%
+ * Increment/Decrement methods
+ */
+void
+dns_generalstats_increment(dns_stats_t *stats, isc_statscounter_t counter) {
+	REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_general);
+
+	isc_stats_increment(stats->counters, counter);
+}
+
+void
+dns_rdatatypestats_increment(dns_stats_t *stats, dns_rdatatype_t type) {
+	int counter;
+
+	REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_rdtype);
+
+	if (type == dns_rdatatype_dlv)
+		counter = rdtypecounter_dlv;
+	else if (type > dns_rdatatype_any)
+		counter = rdtypecounter_others;
+	else
+		counter = (int)type;
+
+	isc_stats_increment(stats->counters, (isc_statscounter_t)counter);
+}
+
+static inline void
+update_rdatasetstats(dns_stats_t *stats, dns_rdatastatstype_t rrsettype,
+		     isc_boolean_t increment)
+{
+	int counter;
+	dns_rdatatype_t rdtype;
+
+	if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
+	     DNS_RDATASTATSTYPE_ATTR_NXDOMAIN) != 0) {
+		counter = rdtypecounter_nxdomain;
+	} else {
+		rdtype = DNS_RDATASTATSTYPE_BASE(rrsettype);
+		if (rdtype == dns_rdatatype_dlv)
+			counter = (int)rdtypecounter_dlv;
+		else if (rdtype > dns_rdatatype_any)
+			counter = (int)rdtypecounter_others;
+		else
+			counter = (int)rdtype;
+
+		if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
+		     DNS_RDATASTATSTYPE_ATTR_NXRRSET) != 0)
+			counter += rdtypecounter_max;
+	}
+
+	if (increment)
+		isc_stats_increment(stats->counters, counter);
+	else
+		isc_stats_decrement(stats->counters, counter);
+}
+
+void
+dns_rdatasetstats_increment(dns_stats_t *stats, dns_rdatastatstype_t rrsettype)
+{
+	REQUIRE(DNS_STATS_VALID(stats) &&
+		stats->type == dns_statstype_rdataset);
+
+	update_rdatasetstats(stats, rrsettype, ISC_TRUE);
+}
+
+void
+dns_rdatasetstats_decrement(dns_stats_t *stats, dns_rdatastatstype_t rrsettype)
+{
+	REQUIRE(DNS_STATS_VALID(stats) &&
+		stats->type == dns_statstype_rdataset);
+
+	update_rdatasetstats(stats, rrsettype, ISC_FALSE);
+}
+void
+dns_opcodestats_increment(dns_stats_t *stats, dns_opcode_t code) {
+	REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_opcode);
+
+	isc_stats_increment(stats->counters, (isc_statscounter_t)code);
+}
+
+/*%
+ * Dump methods
+ */
+void
+dns_generalstats_dump(dns_stats_t *stats, dns_generalstats_dumper_t dump_fn,
+		      void *arg, unsigned int options)
+{
+	REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_general);
+
+	isc_stats_dump(stats->counters, (isc_stats_dumper_t)dump_fn,
+		       arg, options);
+}
+
+static void
+dump_rdentry(int rdcounter, isc_uint64_t value, dns_rdatastatstype_t attributes,
+	     dns_rdatatypestats_dumper_t dump_fn, void * arg)
+{
+	dns_rdatatype_t rdtype = dns_rdatatype_none; /* sentinel */
+	dns_rdatastatstype_t type;
+
+	if (rdcounter == rdtypecounter_others)
+		attributes |= DNS_RDATASTATSTYPE_ATTR_OTHERTYPE;
+	else {
+		if (rdcounter == rdtypecounter_dlv)
+			rdtype = dns_rdatatype_dlv;
+		else
+			rdtype = (dns_rdatatype_t)rdcounter;
+	}
+	type = DNS_RDATASTATSTYPE_VALUE((dns_rdatastatstype_t)rdtype,
+					attributes);
+	dump_fn(type, value, arg);
+}
+
+static void
+rdatatype_dumpcb(isc_statscounter_t counter, isc_uint64_t value, void *arg) {
+	rdatadumparg_t *rdatadumparg = arg;
+
+	dump_rdentry(counter, value, 0, rdatadumparg->fn, rdatadumparg->arg);
+}
+
+void
+dns_rdatatypestats_dump(dns_stats_t *stats, dns_rdatatypestats_dumper_t dump_fn,
+			void *arg0, unsigned int options)
+{
+	rdatadumparg_t arg;
+	REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_rdtype);
+
+	arg.fn = dump_fn;
+	arg.arg = arg0;
+	isc_stats_dump(stats->counters, rdatatype_dumpcb, &arg, options);
+}
+
+static void
+rdataset_dumpcb(isc_statscounter_t counter, isc_uint64_t value, void *arg) {
+	rdatadumparg_t *rdatadumparg = arg;
+
+	if (counter < rdtypecounter_max) {
+		dump_rdentry(counter, value, 0, rdatadumparg->fn,
+			     rdatadumparg->arg);
+	} else if (counter < rdtypenxcounter_max) {
+		dump_rdentry(counter - rdtypecounter_max, value,
+			     DNS_RDATASTATSTYPE_ATTR_NXRRSET,
+			     rdatadumparg->fn, rdatadumparg->arg);
+	} else {
+		dump_rdentry(0, value, DNS_RDATASTATSTYPE_ATTR_NXDOMAIN,
+			     rdatadumparg->fn, rdatadumparg->arg);
+	}
+}
+
+void
+dns_rdatasetstats_dump(dns_stats_t *stats, dns_rdatatypestats_dumper_t dump_fn,
+		       void *arg0, unsigned int options)
+{
+	rdatadumparg_t arg;
+
+	REQUIRE(DNS_STATS_VALID(stats) &&
+		stats->type == dns_statstype_rdataset);
+
+	arg.fn = dump_fn;
+	arg.arg = arg0;
+	isc_stats_dump(stats->counters, rdataset_dumpcb, &arg, options);
+}
+
+static void
+opcode_dumpcb(isc_statscounter_t counter, isc_uint64_t value, void *arg) {
+	opcodedumparg_t *opcodearg = arg;
+
+	opcodearg->fn((dns_opcode_t)counter, value, opcodearg->arg);
+}
+
+void
+dns_opcodestats_dump(dns_stats_t *stats, dns_opcodestats_dumper_t dump_fn,
+		     void *arg0, unsigned int options)
+{
+	opcodedumparg_t arg;
+
+	REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_opcode);
+
+	arg.fn = dump_fn;
+	arg.arg = arg0;
+	isc_stats_dump(stats->counters, opcode_dumpcb, &arg, options);
+}
+
+/***
+ *** Obsolete variables and functions follow:
+ ***/
 LIBDNS_EXTERNAL_DATA const char *dns_statscounter_names[DNS_STATS_NCOUNTERS] =
 	{
 	"success",