contrib/unbound/daemon/stats.c

   1 /*
   2  * daemon/stats.c - collect runtime performance indicators.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file describes the data structure used to collect runtime performance
  40  * numbers. These 'statistics' may be of interest to the operator.
  41  */
  42 #include "config.h"
  43 #ifdef HAVE_TIME_H
  44 #include <time.h>
  45 #endif
  46 #include <sys/time.h>
  47 #include <sys/types.h>
  48 #include "daemon/stats.h"
  49 #include "daemon/worker.h"
  50 #include "daemon/daemon.h"
  51 #include "services/mesh.h"
  52 #include "services/outside_network.h"
  53 #include "services/listen_dnsport.h"
  54 #include "util/config_file.h"
  55 #include "util/tube.h"
  56 #include "util/timehist.h"
  57 #include "util/net_help.h"
  58 #include "validator/validator.h"
  59 #include "iterator/iterator.h"
  60 #include "sldns/sbuffer.h"
  61 #include "services/cache/rrset.h"
  62 #include "services/cache/infra.h"
  63 #include "validator/val_kcache.h"
  64
  65 /** add timers and the values do not overflow or become negative */
  66 static void
  67 stats_timeval_add(long long* d_sec, long long* d_usec, long long add_sec, long long add_usec)
  68 {
  69 #ifndef S_SPLINT_S
  70         (*d_sec) += add_sec;
  71         (*d_usec) += add_usec;
  72         if((*d_usec) > 1000000) {
  73                 (*d_usec) -= 1000000;
  74                 (*d_sec)++;
  75         }
  76 #endif
  77 }
  78
  79 void server_stats_init(struct ub_server_stats* stats, struct config_file* cfg)
  80 {
  81         memset(stats, 0, sizeof(*stats));
  82         stats->extended = cfg->stat_extended;
  83 }
  84
  85 void server_stats_querymiss(struct ub_server_stats* stats, struct worker* worker)
  86 {
  87         stats->num_queries_missed_cache++;
  88         stats->sum_query_list_size += worker->env.mesh->all.count;
  89         if((long long)worker->env.mesh->all.count > stats->max_query_list_size)
  90                 stats->max_query_list_size = (long long)worker->env.mesh->all.count;
  91 }
  92
  93 void server_stats_prefetch(struct ub_server_stats* stats, struct worker* worker)
  94 {
  95         stats->num_queries_prefetch++;
  96         /* changes the query list size so account that, like a querymiss */
  97         stats->sum_query_list_size += worker->env.mesh->all.count;
  98         if((long long)worker->env.mesh->all.count > stats->max_query_list_size)
  99                 stats->max_query_list_size = (long long)worker->env.mesh->all.count;
 100 }
 101
 102 void server_stats_log(struct ub_server_stats* stats, struct worker* worker,
 103         int threadnum)
 104 {
 105         log_info("server stats for thread %d: %u queries, "
 106                 "%u answers from cache, %u recursions, %u prefetch, %u rejected by "
 107                 "ip ratelimiting",
 108                 threadnum, (unsigned)stats->num_queries,
 109                 (unsigned)(stats->num_queries -
 110                         stats->num_queries_missed_cache),
 111                 (unsigned)stats->num_queries_missed_cache,
 112                 (unsigned)stats->num_queries_prefetch,
 113                 (unsigned)stats->num_queries_ip_ratelimited);
 114         log_info("server stats for thread %d: requestlist max %u avg %g "
 115                 "exceeded %u jostled %u", threadnum,
 116                 (unsigned)stats->max_query_list_size,
 117                 (stats->num_queries_missed_cache+stats->num_queries_prefetch)?
 118                         (double)stats->sum_query_list_size/
 119                         (double)(stats->num_queries_missed_cache+
 120                         stats->num_queries_prefetch) : 0.0,
 121                 (unsigned)worker->env.mesh->stats_dropped,
 122                 (unsigned)worker->env.mesh->stats_jostled);
 123 }
 124
 125 /** get rrsets bogus number from validator */
 126 static size_t
 127 get_rrset_bogus(struct worker* worker, int reset)
 128 {
 129         int m = modstack_find(&worker->env.mesh->mods, "validator");
 130         struct val_env* ve;
 131         size_t r;
 132         if(m == -1)
 133                 return 0;
 134         ve = (struct val_env*)worker->env.modinfo[m];
 135         lock_basic_lock(&ve->bogus_lock);
 136         r = ve->num_rrset_bogus;
 137         if(reset && !worker->env.cfg->stat_cumulative)
 138                 ve->num_rrset_bogus = 0;
 139         lock_basic_unlock(&ve->bogus_lock);
 140         return r;
 141 }
 142
 143 /** get number of ratelimited queries from iterator */
 144 static size_t
 145 get_queries_ratelimit(struct worker* worker, int reset)
 146 {
 147         int m = modstack_find(&worker->env.mesh->mods, "iterator");
 148         struct iter_env* ie;
 149         size_t r;
 150         if(m == -1)
 151                 return 0;
 152         ie = (struct iter_env*)worker->env.modinfo[m];
 153         lock_basic_lock(&ie->queries_ratelimit_lock);
 154         r = ie->num_queries_ratelimited;
 155         if(reset && !worker->env.cfg->stat_cumulative)
 156                 ie->num_queries_ratelimited = 0;
 157         lock_basic_unlock(&ie->queries_ratelimit_lock);
 158         return r;
 159 }
 160
 161 #ifdef USE_DNSCRYPT
 162 /** get the number of shared secret cache miss */
 163 static size_t
 164 get_dnscrypt_cache_miss(struct worker* worker, int reset)
 165 {
 166         size_t r;
 167         struct dnsc_env* de = worker->daemon->dnscenv;
 168         if(!de) return 0;
 169
 170         lock_basic_lock(&de->shared_secrets_cache_lock);
 171         r = de->num_query_dnscrypt_secret_missed_cache;
 172         if(reset && !worker->env.cfg->stat_cumulative)
 173                 de->num_query_dnscrypt_secret_missed_cache = 0;
 174         lock_basic_unlock(&de->shared_secrets_cache_lock);
 175         return r;
 176 }
 177
 178 /** get the number of replayed queries */
 179 static size_t
 180 get_dnscrypt_replay(struct worker* worker, int reset)
 181 {
 182         size_t r;
 183         struct dnsc_env* de = worker->daemon->dnscenv;
 184
 185         lock_basic_lock(&de->nonces_cache_lock);
 186         r = de->num_query_dnscrypt_replay;
 187         if(reset && !worker->env.cfg->stat_cumulative)
 188                 de->num_query_dnscrypt_replay = 0;
 189         lock_basic_unlock(&de->nonces_cache_lock);
 190         return r;
 191 }
 192 #endif /* USE_DNSCRYPT */
 193
 194 void
 195 server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 196 {
 197         int i;
 198         struct listen_list* lp;
 199
 200         s->svr = worker->stats;
 201         s->mesh_num_states = (long long)worker->env.mesh->all.count;
 202         s->mesh_num_reply_states = (long long)worker->env.mesh->num_reply_states;
 203         s->mesh_jostled = (long long)worker->env.mesh->stats_jostled;
 204         s->mesh_dropped = (long long)worker->env.mesh->stats_dropped;
 205         s->mesh_replies_sent = (long long)worker->env.mesh->replies_sent;
 206         s->mesh_replies_sum_wait_sec = (long long)worker->env.mesh->replies_sum_wait.tv_sec;
 207         s->mesh_replies_sum_wait_usec = (long long)worker->env.mesh->replies_sum_wait.tv_usec;
 208         s->mesh_time_median = timehist_quartile(worker->env.mesh->histogram,
 209                 0.50);
 210
 211         /* add in the values from the mesh */
 212         s->svr.ans_secure += (long long)worker->env.mesh->ans_secure;
 213         s->svr.ans_bogus += (long long)worker->env.mesh->ans_bogus;
 214         s->svr.ans_rcode_nodata += (long long)worker->env.mesh->ans_nodata;
 215         for(i=0; i<16; i++)
 216                 s->svr.ans_rcode[i] += (long long)worker->env.mesh->ans_rcode[i];
 217         timehist_export(worker->env.mesh->histogram, s->svr.hist,
 218                 NUM_BUCKETS_HIST);
 219         /* values from outside network */
 220         s->svr.unwanted_replies = (long long)worker->back->unwanted_replies;
 221         s->svr.qtcp_outgoing = (long long)worker->back->num_tcp_outgoing;
 222
 223         /* get and reset validator rrset bogus number */
 224         s->svr.rrset_bogus = (long long)get_rrset_bogus(worker, reset);
 225
 226         /* get and reset iterator query ratelimit number */
 227         s->svr.queries_ratelimited = (long long)get_queries_ratelimit(worker, reset);
 228
 229         /* get cache sizes */
 230         s->svr.msg_cache_count = (long long)count_slabhash_entries(worker->env.msg_cache);
 231         s->svr.rrset_cache_count = (long long)count_slabhash_entries(&worker->env.rrset_cache->table);
 232         s->svr.infra_cache_count = (long long)count_slabhash_entries(worker->env.infra_cache->hosts);
 233         if(worker->env.key_cache)
 234                 s->svr.key_cache_count = (long long)count_slabhash_entries(worker->env.key_cache->slab);
 235         else    s->svr.key_cache_count = 0;
 236
 237 #ifdef USE_DNSCRYPT
 238         if(worker->daemon->dnscenv) {
 239                 s->svr.num_query_dnscrypt_secret_missed_cache =
 240                         (long long)get_dnscrypt_cache_miss(worker, reset);
 241                 s->svr.shared_secret_cache_count = (long long)count_slabhash_entries(
 242                         worker->daemon->dnscenv->shared_secrets_cache);
 243                 s->svr.nonce_cache_count = (long long)count_slabhash_entries(
 244                         worker->daemon->dnscenv->nonces_cache);
 245                 s->svr.num_query_dnscrypt_replay =
 246                         (long long)get_dnscrypt_replay(worker, reset);
 247         } else {
 248                 s->svr.num_query_dnscrypt_secret_missed_cache = 0;
 249                 s->svr.shared_secret_cache_count = 0;
 250                 s->svr.nonce_cache_count = 0;
 251                 s->svr.num_query_dnscrypt_replay = 0;
 252         }
 253 #else
 254         s->svr.num_query_dnscrypt_secret_missed_cache = 0;
 255         s->svr.shared_secret_cache_count = 0;
 256         s->svr.nonce_cache_count = 0;
 257         s->svr.num_query_dnscrypt_replay = 0;
 258 #endif /* USE_DNSCRYPT */
 259
 260         /* get tcp accept usage */
 261         s->svr.tcp_accept_usage = 0;
 262         for(lp = worker->front->cps; lp; lp = lp->next) {
 263                 if(lp->com->type == comm_tcp_accept)
 264                         s->svr.tcp_accept_usage += (long long)lp->com->cur_tcp_count;
 265         }
 266
 267         if(reset && !worker->env.cfg->stat_cumulative) {
 268                 worker_stats_clear(worker);
 269         }
 270 }
 271
 272 void server_stats_obtain(struct worker* worker, struct worker* who,
 273         struct ub_stats_info* s, int reset)
 274 {
 275         uint8_t *reply = NULL;
 276         uint32_t len = 0;
 277         if(worker == who) {
 278                 /* just fill it in */
 279                 server_stats_compile(worker, s, reset);
 280                 return;
 281         }
 282         /* communicate over tube */
 283         verbose(VERB_ALGO, "write stats cmd");
 284         if(reset)
 285                 worker_send_cmd(who, worker_cmd_stats);
 286         else    worker_send_cmd(who, worker_cmd_stats_noreset);
 287         verbose(VERB_ALGO, "wait for stats reply");
 288         if(!tube_read_msg(worker->cmd, &reply, &len, 0))
 289                 fatal_exit("failed to read stats over cmd channel");
 290         if(len != (uint32_t)sizeof(*s))
 291                 fatal_exit("stats on cmd channel wrong length %d %d",
 292                         (int)len, (int)sizeof(*s));
 293         memcpy(s, reply, (size_t)len);
 294         free(reply);
 295 }
 296
 297 void server_stats_reply(struct worker* worker, int reset)
 298 {
 299         struct ub_stats_info s;
 300         server_stats_compile(worker, &s, reset);
 301         verbose(VERB_ALGO, "write stats replymsg");
 302         if(!tube_write_msg(worker->daemon->workers[0]->cmd,
 303                 (uint8_t*)&s, sizeof(s), 0))
 304                 fatal_exit("could not write stat values over cmd channel");
 305 }
 306
 307 void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a)
 308 {
 309         total->svr.num_queries += a->svr.num_queries;
 310         total->svr.num_queries_ip_ratelimited += a->svr.num_queries_ip_ratelimited;
 311         total->svr.num_queries_missed_cache += a->svr.num_queries_missed_cache;
 312         total->svr.num_queries_prefetch += a->svr.num_queries_prefetch;
 313         total->svr.sum_query_list_size += a->svr.sum_query_list_size;
 314 #ifdef USE_DNSCRYPT
 315         total->svr.num_query_dnscrypt_crypted += a->svr.num_query_dnscrypt_crypted;
 316         total->svr.num_query_dnscrypt_cert += a->svr.num_query_dnscrypt_cert;
 317         total->svr.num_query_dnscrypt_cleartext += \
 318                 a->svr.num_query_dnscrypt_cleartext;
 319         total->svr.num_query_dnscrypt_crypted_malformed += \
 320                 a->svr.num_query_dnscrypt_crypted_malformed;
 321 #endif /* USE_DNSCRYPT */
 322         /* the max size reached is upped to higher of both */
 323         if(a->svr.max_query_list_size > total->svr.max_query_list_size)
 324                 total->svr.max_query_list_size = a->svr.max_query_list_size;
 325
 326         if(a->svr.extended) {
 327                 int i;
 328                 total->svr.qtype_big += a->svr.qtype_big;
 329                 total->svr.qclass_big += a->svr.qclass_big;
 330                 total->svr.qtcp += a->svr.qtcp;
 331                 total->svr.qtcp_outgoing += a->svr.qtcp_outgoing;
 332                 total->svr.qipv6 += a->svr.qipv6;
 333                 total->svr.qbit_QR += a->svr.qbit_QR;
 334                 total->svr.qbit_AA += a->svr.qbit_AA;
 335                 total->svr.qbit_TC += a->svr.qbit_TC;
 336                 total->svr.qbit_RD += a->svr.qbit_RD;
 337                 total->svr.qbit_RA += a->svr.qbit_RA;
 338                 total->svr.qbit_Z += a->svr.qbit_Z;
 339                 total->svr.qbit_AD += a->svr.qbit_AD;
 340                 total->svr.qbit_CD += a->svr.qbit_CD;
 341                 total->svr.qEDNS += a->svr.qEDNS;
 342                 total->svr.qEDNS_DO += a->svr.qEDNS_DO;
 343                 total->svr.ans_rcode_nodata += a->svr.ans_rcode_nodata;
 344                 total->svr.zero_ttl_responses += a->svr.zero_ttl_responses;
 345                 total->svr.ans_secure += a->svr.ans_secure;
 346                 total->svr.ans_bogus += a->svr.ans_bogus;
 347                 total->svr.unwanted_replies += a->svr.unwanted_replies;
 348                 total->svr.unwanted_queries += a->svr.unwanted_queries;
 349                 total->svr.tcp_accept_usage += a->svr.tcp_accept_usage;
 350                 for(i=0; i<UB_STATS_QTYPE_NUM; i++)
 351                         total->svr.qtype[i] += a->svr.qtype[i];
 352                 for(i=0; i<UB_STATS_QCLASS_NUM; i++)
 353                         total->svr.qclass[i] += a->svr.qclass[i];
 354                 for(i=0; i<UB_STATS_OPCODE_NUM; i++)
 355                         total->svr.qopcode[i] += a->svr.qopcode[i];
 356                 for(i=0; i<UB_STATS_RCODE_NUM; i++)
 357                         total->svr.ans_rcode[i] += a->svr.ans_rcode[i];
 358                 for(i=0; i<NUM_BUCKETS_HIST; i++)
 359                         total->svr.hist[i] += a->svr.hist[i];
 360         }
 361
 362         total->mesh_num_states += a->mesh_num_states;
 363         total->mesh_num_reply_states += a->mesh_num_reply_states;
 364         total->mesh_jostled += a->mesh_jostled;
 365         total->mesh_dropped += a->mesh_dropped;
 366         total->mesh_replies_sent += a->mesh_replies_sent;
 367         stats_timeval_add(&total->mesh_replies_sum_wait_sec, &total->mesh_replies_sum_wait_usec, a->mesh_replies_sum_wait_sec, a->mesh_replies_sum_wait_usec);
 368         /* the medians are averaged together, this is not as accurate as
 369          * taking the median over all of the data, but is good and fast
 370          * added up here, division later*/
 371         total->mesh_time_median += a->mesh_time_median;
 372 }
 373
 374 void server_stats_insquery(struct ub_server_stats* stats, struct comm_point* c,
 375         uint16_t qtype, uint16_t qclass, struct edns_data* edns,
 376         struct comm_reply* repinfo)
 377 {
 378         uint16_t flags = sldns_buffer_read_u16_at(c->buffer, 2);
 379         if(qtype < UB_STATS_QTYPE_NUM)
 380                 stats->qtype[qtype]++;
 381         else    stats->qtype_big++;
 382         if(qclass < UB_STATS_QCLASS_NUM)
 383                 stats->qclass[qclass]++;
 384         else    stats->qclass_big++;
 385         stats->qopcode[ LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) ]++;
 386         if(c->type != comm_udp)
 387                 stats->qtcp++;
 388         if(repinfo && addr_is_ip6(&repinfo->addr, repinfo->addrlen))
 389                 stats->qipv6++;
 390         if( (flags&BIT_QR) )
 391                 stats->qbit_QR++;
 392         if( (flags&BIT_AA) )
 393                 stats->qbit_AA++;
 394         if( (flags&BIT_TC) )
 395                 stats->qbit_TC++;
 396         if( (flags&BIT_RD) )
 397                 stats->qbit_RD++;
 398         if( (flags&BIT_RA) )
 399                 stats->qbit_RA++;
 400         if( (flags&BIT_Z) )
 401                 stats->qbit_Z++;
 402         if( (flags&BIT_AD) )
 403                 stats->qbit_AD++;
 404         if( (flags&BIT_CD) )
 405                 stats->qbit_CD++;
 406         if(edns->edns_present) {
 407                 stats->qEDNS++;
 408                 if( (edns->bits & EDNS_DO) )
 409                         stats->qEDNS_DO++;
 410         }
 411 }
 412
 413 void server_stats_insrcode(struct ub_server_stats* stats, sldns_buffer* buf)
 414 {
 415         if(stats->extended && sldns_buffer_limit(buf) != 0) {
 416                 int r = (int)LDNS_RCODE_WIRE( sldns_buffer_begin(buf) );
 417                 stats->ans_rcode[r] ++;
 418                 if(r == 0 && LDNS_ANCOUNT( sldns_buffer_begin(buf) ) == 0)
 419                         stats->ans_rcode_nodata ++;
 420         }
 421 }