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These files were pulled from the 1.6.3 release tarball. This new version builds against OpenSSL version 1.1 which will be the default in the new Debian Stable which is due to be released RealSoonNow (tm).
344 lines
12 KiB
C
344 lines
12 KiB
C
/*
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* daemon/stats.c - collect runtime performance indicators.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file describes the data structure used to collect runtime performance
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* numbers. These 'statistics' may be of interest to the operator.
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*/
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#include "config.h"
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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
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#include <sys/time.h>
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#include <sys/types.h>
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#include "daemon/stats.h"
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#include "daemon/worker.h"
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#include "daemon/daemon.h"
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#include "services/mesh.h"
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#include "services/outside_network.h"
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#include "services/listen_dnsport.h"
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#include "util/config_file.h"
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#include "util/tube.h"
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#include "util/timehist.h"
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#include "util/net_help.h"
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#include "validator/validator.h"
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#include "sldns/sbuffer.h"
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#include "services/cache/rrset.h"
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#include "services/cache/infra.h"
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#include "validator/val_kcache.h"
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/** add timers and the values do not overflow or become negative */
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static void
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timeval_add(struct timeval* d, const struct timeval* add)
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{
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#ifndef S_SPLINT_S
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d->tv_sec += add->tv_sec;
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d->tv_usec += add->tv_usec;
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if(d->tv_usec > 1000000) {
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d->tv_usec -= 1000000;
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d->tv_sec++;
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}
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#endif
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}
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void server_stats_init(struct server_stats* stats, struct config_file* cfg)
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{
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memset(stats, 0, sizeof(*stats));
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stats->extended = cfg->stat_extended;
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}
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void server_stats_querymiss(struct server_stats* stats, struct worker* worker)
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{
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stats->num_queries_missed_cache++;
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stats->sum_query_list_size += worker->env.mesh->all.count;
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if(worker->env.mesh->all.count > stats->max_query_list_size)
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stats->max_query_list_size = worker->env.mesh->all.count;
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}
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void server_stats_prefetch(struct server_stats* stats, struct worker* worker)
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{
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stats->num_queries_prefetch++;
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/* changes the query list size so account that, like a querymiss */
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stats->sum_query_list_size += worker->env.mesh->all.count;
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if(worker->env.mesh->all.count > stats->max_query_list_size)
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stats->max_query_list_size = worker->env.mesh->all.count;
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}
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void server_stats_log(struct server_stats* stats, struct worker* worker,
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int threadnum)
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{
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log_info("server stats for thread %d: %u queries, "
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"%u answers from cache, %u recursions, %u prefetch, %u rejected by "
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"ip ratelimiting",
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threadnum, (unsigned)stats->num_queries,
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(unsigned)(stats->num_queries -
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stats->num_queries_missed_cache),
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(unsigned)stats->num_queries_missed_cache,
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(unsigned)stats->num_queries_prefetch,
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(unsigned)stats->num_queries_ip_ratelimited);
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log_info("server stats for thread %d: requestlist max %u avg %g "
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"exceeded %u jostled %u", threadnum,
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(unsigned)stats->max_query_list_size,
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(stats->num_queries_missed_cache+stats->num_queries_prefetch)?
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(double)stats->sum_query_list_size/
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(stats->num_queries_missed_cache+
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stats->num_queries_prefetch) : 0.0,
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(unsigned)worker->env.mesh->stats_dropped,
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(unsigned)worker->env.mesh->stats_jostled);
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}
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/** get rrsets bogus number from validator */
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static size_t
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get_rrset_bogus(struct worker* worker)
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{
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int m = modstack_find(&worker->env.mesh->mods, "validator");
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struct val_env* ve;
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size_t r;
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if(m == -1)
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return 0;
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ve = (struct val_env*)worker->env.modinfo[m];
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lock_basic_lock(&ve->bogus_lock);
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r = ve->num_rrset_bogus;
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if(!worker->env.cfg->stat_cumulative)
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ve->num_rrset_bogus = 0;
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lock_basic_unlock(&ve->bogus_lock);
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return r;
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}
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void
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server_stats_compile(struct worker* worker, struct stats_info* s, int reset)
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{
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int i;
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struct listen_list* lp;
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s->svr = worker->stats;
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s->mesh_num_states = worker->env.mesh->all.count;
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s->mesh_num_reply_states = worker->env.mesh->num_reply_states;
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s->mesh_jostled = worker->env.mesh->stats_jostled;
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s->mesh_dropped = worker->env.mesh->stats_dropped;
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s->mesh_replies_sent = worker->env.mesh->replies_sent;
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s->mesh_replies_sum_wait = worker->env.mesh->replies_sum_wait;
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s->mesh_time_median = timehist_quartile(worker->env.mesh->histogram,
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0.50);
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/* add in the values from the mesh */
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s->svr.ans_secure += worker->env.mesh->ans_secure;
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s->svr.ans_bogus += worker->env.mesh->ans_bogus;
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s->svr.ans_rcode_nodata += worker->env.mesh->ans_nodata;
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for(i=0; i<16; i++)
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s->svr.ans_rcode[i] += worker->env.mesh->ans_rcode[i];
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timehist_export(worker->env.mesh->histogram, s->svr.hist,
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NUM_BUCKETS_HIST);
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/* values from outside network */
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s->svr.unwanted_replies = worker->back->unwanted_replies;
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s->svr.qtcp_outgoing = worker->back->num_tcp_outgoing;
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/* get and reset validator rrset bogus number */
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s->svr.rrset_bogus = get_rrset_bogus(worker);
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/* get cache sizes */
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s->svr.msg_cache_count = count_slabhash_entries(worker->env.msg_cache);
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s->svr.rrset_cache_count = count_slabhash_entries(&worker->env.rrset_cache->table);
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s->svr.infra_cache_count = count_slabhash_entries(worker->env.infra_cache->hosts);
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if(worker->env.key_cache)
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s->svr.key_cache_count = count_slabhash_entries(worker->env.key_cache->slab);
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else s->svr.key_cache_count = 0;
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/* get tcp accept usage */
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s->svr.tcp_accept_usage = 0;
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for(lp = worker->front->cps; lp; lp = lp->next) {
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if(lp->com->type == comm_tcp_accept)
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s->svr.tcp_accept_usage += lp->com->cur_tcp_count;
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}
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if(reset && !worker->env.cfg->stat_cumulative) {
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worker_stats_clear(worker);
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}
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}
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void server_stats_obtain(struct worker* worker, struct worker* who,
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struct stats_info* s, int reset)
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{
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uint8_t *reply = NULL;
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uint32_t len = 0;
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if(worker == who) {
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/* just fill it in */
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server_stats_compile(worker, s, reset);
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return;
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}
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/* communicate over tube */
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verbose(VERB_ALGO, "write stats cmd");
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if(reset)
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worker_send_cmd(who, worker_cmd_stats);
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else worker_send_cmd(who, worker_cmd_stats_noreset);
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verbose(VERB_ALGO, "wait for stats reply");
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if(!tube_read_msg(worker->cmd, &reply, &len, 0))
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fatal_exit("failed to read stats over cmd channel");
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if(len != (uint32_t)sizeof(*s))
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fatal_exit("stats on cmd channel wrong length %d %d",
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(int)len, (int)sizeof(*s));
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memcpy(s, reply, (size_t)len);
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free(reply);
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}
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void server_stats_reply(struct worker* worker, int reset)
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{
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struct stats_info s;
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server_stats_compile(worker, &s, reset);
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verbose(VERB_ALGO, "write stats replymsg");
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if(!tube_write_msg(worker->daemon->workers[0]->cmd,
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(uint8_t*)&s, sizeof(s), 0))
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fatal_exit("could not write stat values over cmd channel");
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}
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void server_stats_add(struct stats_info* total, struct stats_info* a)
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{
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total->svr.num_queries += a->svr.num_queries;
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total->svr.num_queries_ip_ratelimited += a->svr.num_queries_ip_ratelimited;
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total->svr.num_queries_missed_cache += a->svr.num_queries_missed_cache;
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total->svr.num_queries_prefetch += a->svr.num_queries_prefetch;
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total->svr.sum_query_list_size += a->svr.sum_query_list_size;
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#ifdef USE_DNSCRYPT
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total->svr.num_query_dnscrypt_crypted += a->svr.num_query_dnscrypt_crypted;
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total->svr.num_query_dnscrypt_cert += a->svr.num_query_dnscrypt_cert;
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total->svr.num_query_dnscrypt_cleartext += \
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a->svr.num_query_dnscrypt_cleartext;
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total->svr.num_query_dnscrypt_crypted_malformed += \
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a->svr.num_query_dnscrypt_crypted_malformed;
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#endif
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/* the max size reached is upped to higher of both */
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if(a->svr.max_query_list_size > total->svr.max_query_list_size)
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total->svr.max_query_list_size = a->svr.max_query_list_size;
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if(a->svr.extended) {
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int i;
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total->svr.qtype_big += a->svr.qtype_big;
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total->svr.qclass_big += a->svr.qclass_big;
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total->svr.qtcp += a->svr.qtcp;
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total->svr.qtcp_outgoing += a->svr.qtcp_outgoing;
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total->svr.qipv6 += a->svr.qipv6;
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total->svr.qbit_QR += a->svr.qbit_QR;
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total->svr.qbit_AA += a->svr.qbit_AA;
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total->svr.qbit_TC += a->svr.qbit_TC;
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total->svr.qbit_RD += a->svr.qbit_RD;
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total->svr.qbit_RA += a->svr.qbit_RA;
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total->svr.qbit_Z += a->svr.qbit_Z;
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total->svr.qbit_AD += a->svr.qbit_AD;
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total->svr.qbit_CD += a->svr.qbit_CD;
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total->svr.qEDNS += a->svr.qEDNS;
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total->svr.qEDNS_DO += a->svr.qEDNS_DO;
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total->svr.ans_rcode_nodata += a->svr.ans_rcode_nodata;
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total->svr.zero_ttl_responses += a->svr.zero_ttl_responses;
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total->svr.ans_secure += a->svr.ans_secure;
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total->svr.ans_bogus += a->svr.ans_bogus;
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total->svr.rrset_bogus += a->svr.rrset_bogus;
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total->svr.unwanted_replies += a->svr.unwanted_replies;
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total->svr.unwanted_queries += a->svr.unwanted_queries;
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total->svr.tcp_accept_usage += a->svr.tcp_accept_usage;
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for(i=0; i<STATS_QTYPE_NUM; i++)
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total->svr.qtype[i] += a->svr.qtype[i];
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for(i=0; i<STATS_QCLASS_NUM; i++)
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total->svr.qclass[i] += a->svr.qclass[i];
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for(i=0; i<STATS_OPCODE_NUM; i++)
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total->svr.qopcode[i] += a->svr.qopcode[i];
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for(i=0; i<STATS_RCODE_NUM; i++)
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total->svr.ans_rcode[i] += a->svr.ans_rcode[i];
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for(i=0; i<NUM_BUCKETS_HIST; i++)
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total->svr.hist[i] += a->svr.hist[i];
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}
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total->mesh_num_states += a->mesh_num_states;
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total->mesh_num_reply_states += a->mesh_num_reply_states;
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total->mesh_jostled += a->mesh_jostled;
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total->mesh_dropped += a->mesh_dropped;
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total->mesh_replies_sent += a->mesh_replies_sent;
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timeval_add(&total->mesh_replies_sum_wait, &a->mesh_replies_sum_wait);
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/* the medians are averaged together, this is not as accurate as
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* taking the median over all of the data, but is good and fast
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* added up here, division later*/
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total->mesh_time_median += a->mesh_time_median;
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}
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void server_stats_insquery(struct server_stats* stats, struct comm_point* c,
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uint16_t qtype, uint16_t qclass, struct edns_data* edns,
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struct comm_reply* repinfo)
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{
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uint16_t flags = sldns_buffer_read_u16_at(c->buffer, 2);
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if(qtype < STATS_QTYPE_NUM)
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stats->qtype[qtype]++;
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else stats->qtype_big++;
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if(qclass < STATS_QCLASS_NUM)
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stats->qclass[qclass]++;
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else stats->qclass_big++;
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stats->qopcode[ LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) ]++;
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if(c->type != comm_udp)
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stats->qtcp++;
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if(repinfo && addr_is_ip6(&repinfo->addr, repinfo->addrlen))
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stats->qipv6++;
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if( (flags&BIT_QR) )
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stats->qbit_QR++;
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if( (flags&BIT_AA) )
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stats->qbit_AA++;
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if( (flags&BIT_TC) )
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stats->qbit_TC++;
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if( (flags&BIT_RD) )
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stats->qbit_RD++;
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if( (flags&BIT_RA) )
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stats->qbit_RA++;
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if( (flags&BIT_Z) )
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stats->qbit_Z++;
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if( (flags&BIT_AD) )
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stats->qbit_AD++;
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if( (flags&BIT_CD) )
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stats->qbit_CD++;
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if(edns->edns_present) {
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stats->qEDNS++;
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if( (edns->bits & EDNS_DO) )
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stats->qEDNS_DO++;
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}
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}
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void server_stats_insrcode(struct server_stats* stats, sldns_buffer* buf)
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{
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if(stats->extended && sldns_buffer_limit(buf) != 0) {
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int r = (int)LDNS_RCODE_WIRE( sldns_buffer_begin(buf) );
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stats->ans_rcode[r] ++;
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if(r == 0 && LDNS_ANCOUNT( sldns_buffer_begin(buf) ) == 0)
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stats->ans_rcode_nodata ++;
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}
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}
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