mirror of
https://github.com/isc-projects/bind9.git
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091d738c72
Remove the complicated mechanism that could be (in theory) used by external libraries to register new categories and modules with statically defined lists in <isc/log.h>. This is similar to what we have done for <isc/result.h> result codes. All the libraries are now internal to BIND 9, so we don't need to provide a mechanism to register extra categories and modules.
608 lines
16 KiB
C
608 lines
16 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*! \file */
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#include <inttypes.h>
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#include <stdbool.h>
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#include <isc/log.h>
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#include <isc/magic.h>
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#include <isc/mem.h>
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#include <isc/refcount.h>
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#include <isc/stats.h>
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#include <isc/util.h>
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#include <dns/opcode.h>
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#include <dns/rdatatype.h>
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#include <dns/stats.h>
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#define DNS_STATS_MAGIC ISC_MAGIC('D', 's', 't', 't')
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#define DNS_STATS_VALID(x) ISC_MAGIC_VALID(x, DNS_STATS_MAGIC)
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/*%
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* Statistics types.
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*/
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typedef enum {
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dns_statstype_general = 0,
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dns_statstype_rdtype = 1,
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dns_statstype_rdataset = 2,
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dns_statstype_opcode = 3,
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dns_statstype_rcode = 4,
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dns_statstype_dnssec = 5
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} dns_statstype_t;
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/*%
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* It doesn't make sense to have 2^16 counters for all possible types since
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* most of them won't be used. We have counters for the first 256 types.
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*
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* A rdtypecounter is now 8 bits for RRtypes and 3 bits for flags:
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*
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* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | | | | | | S |NX| RRType |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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*
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* If the 8 bits for RRtype are all zero, this is an Other RRtype.
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*/
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#define RDTYPECOUNTER_MAXTYPE 0x00ff
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/*
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*
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* Bit 7 is the NXRRSET (NX) flag and indicates whether this is a
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* positive (0) or a negative (1) RRset.
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*/
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#define RDTYPECOUNTER_NXRRSET 0x0100
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/*
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* Then bit 5 and 6 mostly tell you if this counter is for an active,
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* stale, or ancient RRtype:
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*
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* S = 0 (0b00) means Active
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* S = 1 (0b01) means Stale
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* S = 2 (0b10) means Ancient
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*
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* Since a counter cannot be stale and ancient at the same time, we
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* treat S = 0b11 as a special case to deal with NXDOMAIN counters.
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*/
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#define RDTYPECOUNTER_STALE (1 << 9)
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#define RDTYPECOUNTER_ANCIENT (1 << 10)
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#define RDTYPECOUNTER_NXDOMAIN ((1 << 9) | (1 << 10))
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/*
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* S = 0b11 indicates an NXDOMAIN counter and in this case the RRtype
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* field signals the expiry of this cached item:
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*
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* RRType = 0 (0b00) means Active
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* RRType = 1 (0b01) means Stale
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* RRType = 2 (0b02) means Ancient
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*
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*/
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#define RDTYPECOUNTER_NXDOMAIN_STALE 1
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#define RDTYPECOUNTER_NXDOMAIN_ANCIENT 2
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/*
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* The maximum value for rdtypecounter is for an ancient NXDOMAIN.
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*/
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#define RDTYPECOUNTER_MAXVAL 0x0602
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/*
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* DNSSEC sign statistics.
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*
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* Per key we maintain 3 counters. The first is actually no counter but
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* a key id reference. The second is the number of signatures the key created.
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* The third is the number of signatures refreshed by the key.
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*/
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/* Maximum number of keys to keep track of for DNSSEC signing statistics. */
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static int dnssecsign_num_keys = 4;
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static int dnssecsign_block_size = 3;
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struct dns_stats {
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unsigned int magic;
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dns_statstype_t type;
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isc_mem_t *mctx;
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isc_stats_t *counters;
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isc_refcount_t references;
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};
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typedef struct rdatadumparg {
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dns_rdatatypestats_dumper_t fn;
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void *arg;
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} rdatadumparg_t;
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typedef struct opcodedumparg {
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dns_opcodestats_dumper_t fn;
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void *arg;
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} opcodedumparg_t;
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typedef struct rcodedumparg {
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dns_rcodestats_dumper_t fn;
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void *arg;
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} rcodedumparg_t;
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typedef struct dnssecsigndumparg {
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dns_dnssecsignstats_dumper_t fn;
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void *arg;
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} dnssecsigndumparg_t;
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void
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dns_stats_attach(dns_stats_t *stats, dns_stats_t **statsp) {
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REQUIRE(DNS_STATS_VALID(stats));
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REQUIRE(statsp != NULL && *statsp == NULL);
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isc_refcount_increment(&stats->references);
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*statsp = stats;
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}
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void
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dns_stats_detach(dns_stats_t **statsp) {
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dns_stats_t *stats;
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REQUIRE(statsp != NULL && DNS_STATS_VALID(*statsp));
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stats = *statsp;
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*statsp = NULL;
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if (isc_refcount_decrement(&stats->references) == 1) {
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isc_refcount_destroy(&stats->references);
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isc_stats_detach(&stats->counters);
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isc_mem_putanddetach(&stats->mctx, stats, sizeof(*stats));
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}
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}
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/*%
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* Create methods
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*/
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static void
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create_stats(isc_mem_t *mctx, dns_statstype_t type, int ncounters,
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dns_stats_t **statsp) {
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dns_stats_t *stats = isc_mem_get(mctx, sizeof(*stats));
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stats->counters = NULL;
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isc_refcount_init(&stats->references, 1);
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isc_stats_create(mctx, &stats->counters, ncounters);
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stats->magic = DNS_STATS_MAGIC;
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stats->type = type;
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stats->mctx = NULL;
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isc_mem_attach(mctx, &stats->mctx);
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*statsp = stats;
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}
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void
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dns_generalstats_create(isc_mem_t *mctx, dns_stats_t **statsp, int ncounters) {
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REQUIRE(statsp != NULL && *statsp == NULL);
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create_stats(mctx, dns_statstype_general, ncounters, statsp);
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}
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void
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dns_rdatatypestats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
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REQUIRE(statsp != NULL && *statsp == NULL);
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/*
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* Create rdtype statistics for the first 255 RRtypes,
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* plus one additional for other RRtypes.
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*/
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create_stats(mctx, dns_statstype_rdtype, (RDTYPECOUNTER_MAXTYPE + 1),
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statsp);
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}
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void
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dns_rdatasetstats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
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REQUIRE(statsp != NULL && *statsp == NULL);
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create_stats(mctx, dns_statstype_rdataset, (RDTYPECOUNTER_MAXVAL + 1),
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statsp);
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}
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void
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dns_opcodestats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
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REQUIRE(statsp != NULL && *statsp == NULL);
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create_stats(mctx, dns_statstype_opcode, 16, statsp);
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}
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void
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dns_rcodestats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
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REQUIRE(statsp != NULL && *statsp == NULL);
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create_stats(mctx, dns_statstype_rcode, dns_rcode_badcookie + 1,
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statsp);
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}
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void
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dns_dnssecsignstats_create(isc_mem_t *mctx, dns_stats_t **statsp) {
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REQUIRE(statsp != NULL && *statsp == NULL);
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/*
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* Create two counters per key, one is the key id, the other two are
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* the actual counters for creating and refreshing signatures.
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*/
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create_stats(mctx, dns_statstype_dnssec,
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dnssecsign_num_keys * dnssecsign_block_size, statsp);
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}
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/*%
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* Increment/Decrement methods
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*/
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void
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dns_generalstats_increment(dns_stats_t *stats, isc_statscounter_t counter) {
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_general);
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isc_stats_increment(stats->counters, counter);
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}
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static isc_statscounter_t
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rdatatype2counter(dns_rdatatype_t type) {
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if (type > (dns_rdatatype_t)RDTYPECOUNTER_MAXTYPE) {
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return (0);
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}
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return ((isc_statscounter_t)type);
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}
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void
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dns_rdatatypestats_increment(dns_stats_t *stats, dns_rdatatype_t type) {
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isc_statscounter_t counter;
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_rdtype);
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counter = rdatatype2counter(type);
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isc_stats_increment(stats->counters, counter);
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}
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static void
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update_rdatasetstats(dns_stats_t *stats, dns_rdatastatstype_t rrsettype,
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bool increment) {
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isc_statscounter_t counter;
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if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
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DNS_RDATASTATSTYPE_ATTR_NXDOMAIN) != 0)
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{
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counter = RDTYPECOUNTER_NXDOMAIN;
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/*
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* This is an NXDOMAIN counter, save the expiry value
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* (active, stale, or ancient) value in the RRtype part.
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*/
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if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
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DNS_RDATASTATSTYPE_ATTR_ANCIENT) != 0)
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{
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counter |= RDTYPECOUNTER_NXDOMAIN_ANCIENT;
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} else if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
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DNS_RDATASTATSTYPE_ATTR_STALE) != 0)
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{
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counter += RDTYPECOUNTER_NXDOMAIN_STALE;
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}
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} else {
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counter = rdatatype2counter(DNS_RDATASTATSTYPE_BASE(rrsettype));
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if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
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DNS_RDATASTATSTYPE_ATTR_NXRRSET) != 0)
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{
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counter |= RDTYPECOUNTER_NXRRSET;
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}
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if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
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DNS_RDATASTATSTYPE_ATTR_ANCIENT) != 0)
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{
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counter |= RDTYPECOUNTER_ANCIENT;
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} else if ((DNS_RDATASTATSTYPE_ATTR(rrsettype) &
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DNS_RDATASTATSTYPE_ATTR_STALE) != 0)
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{
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counter |= RDTYPECOUNTER_STALE;
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}
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}
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if (increment) {
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isc_stats_increment(stats->counters, counter);
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} else {
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isc_stats_decrement(stats->counters, counter);
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}
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}
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void
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dns_rdatasetstats_increment(dns_stats_t *stats,
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dns_rdatastatstype_t rrsettype) {
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REQUIRE(DNS_STATS_VALID(stats) &&
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stats->type == dns_statstype_rdataset);
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update_rdatasetstats(stats, rrsettype, true);
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}
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void
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dns_rdatasetstats_decrement(dns_stats_t *stats,
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dns_rdatastatstype_t rrsettype) {
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REQUIRE(DNS_STATS_VALID(stats) &&
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stats->type == dns_statstype_rdataset);
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update_rdatasetstats(stats, rrsettype, false);
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}
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void
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dns_opcodestats_increment(dns_stats_t *stats, dns_opcode_t code) {
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_opcode);
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isc_stats_increment(stats->counters, (isc_statscounter_t)code);
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}
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void
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dns_rcodestats_increment(dns_stats_t *stats, dns_rcode_t code) {
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_rcode);
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if (code <= dns_rcode_badcookie) {
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isc_stats_increment(stats->counters, (isc_statscounter_t)code);
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}
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}
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void
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dns_dnssecsignstats_increment(dns_stats_t *stats, dns_keytag_t id, uint8_t alg,
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dnssecsignstats_type_t operation) {
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uint32_t kval;
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_dnssec);
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int num_keys = isc_stats_ncounters(stats->counters) /
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dnssecsign_block_size;
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/* Shift algorithm in front of key tag, which is 16 bits */
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kval = (uint32_t)(alg << 16 | id);
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/* Look up correct counter. */
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for (int i = 0; i < num_keys; i++) {
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int idx = i * dnssecsign_block_size;
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uint32_t counter = isc_stats_get_counter(stats->counters, idx);
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if (counter == kval) {
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/* Match */
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isc_stats_increment(stats->counters, (idx + operation));
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return;
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}
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}
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/* No match found. Store key in unused slot. */
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for (int i = 0; i < num_keys; i++) {
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int idx = i * dnssecsign_block_size;
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uint32_t counter = isc_stats_get_counter(stats->counters, idx);
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if (counter == 0) {
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isc_stats_set(stats->counters, kval, idx);
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isc_stats_increment(stats->counters, (idx + operation));
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return;
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}
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}
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/* No room, grow stats storage. */
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isc_stats_resize(&stats->counters,
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(num_keys * dnssecsign_block_size * 2));
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/* Reset counters for new key (new index, nidx). */
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int nidx = num_keys * dnssecsign_block_size;
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isc_stats_set(stats->counters, kval, nidx);
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isc_stats_set(stats->counters, 0, (nidx + dns_dnssecsignstats_sign));
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isc_stats_set(stats->counters, 0, (nidx + dns_dnssecsignstats_refresh));
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/* And increment the counter for the given operation. */
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isc_stats_increment(stats->counters, (nidx + operation));
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}
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void
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dns_dnssecsignstats_clear(dns_stats_t *stats, dns_keytag_t id, uint8_t alg) {
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uint32_t kval;
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_dnssec);
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int num_keys = isc_stats_ncounters(stats->counters) /
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dnssecsign_block_size;
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/* Shift algorithm in front of key tag, which is 16 bits */
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kval = (uint32_t)(alg << 16 | id);
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/* Look up correct counter. */
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for (int i = 0; i < num_keys; i++) {
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int idx = i * dnssecsign_block_size;
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uint32_t counter = isc_stats_get_counter(stats->counters, idx);
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if (counter == kval) {
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/* Match */
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isc_stats_set(stats->counters, 0, idx);
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isc_stats_set(stats->counters, 0,
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(idx + dns_dnssecsignstats_sign));
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isc_stats_set(stats->counters, 0,
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(idx + dns_dnssecsignstats_refresh));
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return;
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}
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}
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}
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/*%
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* Dump methods
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*/
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void
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dns_generalstats_dump(dns_stats_t *stats, dns_generalstats_dumper_t dump_fn,
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void *arg, unsigned int options) {
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_general);
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isc_stats_dump(stats->counters, (isc_stats_dumper_t)dump_fn, arg,
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options);
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}
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static void
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dump_rdentry(int rdcounter, uint64_t value, dns_rdatastatstype_t attributes,
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dns_rdatatypestats_dumper_t dump_fn, void *arg) {
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dns_rdatatype_t rdtype = dns_rdatatype_none; /* sentinel */
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dns_rdatastatstype_t type;
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if ((rdcounter & RDTYPECOUNTER_MAXTYPE) == 0) {
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attributes |= DNS_RDATASTATSTYPE_ATTR_OTHERTYPE;
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} else {
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rdtype = (dns_rdatatype_t)(rdcounter & RDTYPECOUNTER_MAXTYPE);
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}
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type = DNS_RDATASTATSTYPE_VALUE((dns_rdatastatstype_t)rdtype,
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attributes);
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dump_fn(type, value, arg);
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}
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static void
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rdatatype_dumpcb(isc_statscounter_t counter, uint64_t value, void *arg) {
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rdatadumparg_t *rdatadumparg = arg;
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dump_rdentry(counter, value, 0, rdatadumparg->fn, rdatadumparg->arg);
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}
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void
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dns_rdatatypestats_dump(dns_stats_t *stats, dns_rdatatypestats_dumper_t dump_fn,
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void *arg0, unsigned int options) {
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rdatadumparg_t arg;
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REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_rdtype);
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arg.fn = dump_fn;
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arg.arg = arg0;
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isc_stats_dump(stats->counters, rdatatype_dumpcb, &arg, options);
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}
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static void
|
|
rdataset_dumpcb(isc_statscounter_t counter, uint64_t value, void *arg) {
|
|
rdatadumparg_t *rdatadumparg = arg;
|
|
unsigned int attributes = 0;
|
|
|
|
if ((counter & RDTYPECOUNTER_NXDOMAIN) == RDTYPECOUNTER_NXDOMAIN) {
|
|
attributes |= DNS_RDATASTATSTYPE_ATTR_NXDOMAIN;
|
|
|
|
/*
|
|
* This is an NXDOMAIN counter, check the RRtype part for the
|
|
* expiry value (active, stale, or ancient).
|
|
*/
|
|
if ((counter & RDTYPECOUNTER_MAXTYPE) ==
|
|
RDTYPECOUNTER_NXDOMAIN_STALE)
|
|
{
|
|
attributes |= DNS_RDATASTATSTYPE_ATTR_STALE;
|
|
} else if ((counter & RDTYPECOUNTER_MAXTYPE) ==
|
|
RDTYPECOUNTER_NXDOMAIN_ANCIENT)
|
|
{
|
|
attributes |= DNS_RDATASTATSTYPE_ATTR_ANCIENT;
|
|
}
|
|
} else {
|
|
if ((counter & RDTYPECOUNTER_MAXTYPE) == 0) {
|
|
attributes |= DNS_RDATASTATSTYPE_ATTR_OTHERTYPE;
|
|
}
|
|
if ((counter & RDTYPECOUNTER_NXRRSET) != 0) {
|
|
attributes |= DNS_RDATASTATSTYPE_ATTR_NXRRSET;
|
|
}
|
|
|
|
if ((counter & RDTYPECOUNTER_STALE) != 0) {
|
|
attributes |= DNS_RDATASTATSTYPE_ATTR_STALE;
|
|
} else if ((counter & RDTYPECOUNTER_ANCIENT) != 0) {
|
|
attributes |= DNS_RDATASTATSTYPE_ATTR_ANCIENT;
|
|
}
|
|
}
|
|
|
|
dump_rdentry(counter, value, attributes, 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
|
|
dnssec_dumpcb(isc_statscounter_t counter, uint64_t value, void *arg) {
|
|
dnssecsigndumparg_t *dnssecarg = arg;
|
|
|
|
dnssecarg->fn((uint32_t)counter, value, dnssecarg->arg);
|
|
}
|
|
|
|
static void
|
|
dnssec_statsdump(isc_stats_t *stats, dnssecsignstats_type_t operation,
|
|
isc_stats_dumper_t dump_fn, void *arg, unsigned int options) {
|
|
int i, num_keys;
|
|
|
|
num_keys = isc_stats_ncounters(stats) / dnssecsign_block_size;
|
|
for (i = 0; i < num_keys; i++) {
|
|
int idx = dnssecsign_block_size * i;
|
|
uint32_t kval, val;
|
|
|
|
kval = isc_stats_get_counter(stats, idx);
|
|
if (kval == 0) {
|
|
continue;
|
|
}
|
|
|
|
val = isc_stats_get_counter(stats, (idx + operation));
|
|
if ((options & ISC_STATSDUMP_VERBOSE) == 0 && val == 0) {
|
|
continue;
|
|
}
|
|
|
|
dump_fn(kval, val, arg);
|
|
}
|
|
}
|
|
|
|
void
|
|
dns_dnssecsignstats_dump(dns_stats_t *stats, dnssecsignstats_type_t operation,
|
|
dns_dnssecsignstats_dumper_t dump_fn, void *arg0,
|
|
unsigned int options) {
|
|
dnssecsigndumparg_t arg;
|
|
|
|
REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_dnssec);
|
|
|
|
arg.fn = dump_fn;
|
|
arg.arg = arg0;
|
|
|
|
dnssec_statsdump(stats->counters, operation, dnssec_dumpcb, &arg,
|
|
options);
|
|
}
|
|
|
|
static void
|
|
opcode_dumpcb(isc_statscounter_t counter, uint64_t value, void *arg) {
|
|
opcodedumparg_t *opcodearg = arg;
|
|
|
|
opcodearg->fn((dns_opcode_t)counter, value, opcodearg->arg);
|
|
}
|
|
|
|
static void
|
|
rcode_dumpcb(isc_statscounter_t counter, uint64_t value, void *arg) {
|
|
rcodedumparg_t *rcodearg = arg;
|
|
|
|
rcodearg->fn((dns_rcode_t)counter, value, rcodearg->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);
|
|
}
|
|
|
|
void
|
|
dns_rcodestats_dump(dns_stats_t *stats, dns_rcodestats_dumper_t dump_fn,
|
|
void *arg0, unsigned int options) {
|
|
rcodedumparg_t arg;
|
|
|
|
REQUIRE(DNS_STATS_VALID(stats) && stats->type == dns_statstype_rcode);
|
|
|
|
arg.fn = dump_fn;
|
|
arg.arg = arg0;
|
|
isc_stats_dump(stats->counters, rcode_dumpcb, &arg, options);
|
|
}
|