249 lines
8.0 KiB
C
249 lines
8.0 KiB
C
/*
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* daemon/stats.h - 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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#ifndef DAEMON_STATS_H
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#define DAEMON_STATS_H
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#include "util/timehist.h"
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struct worker;
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struct config_file;
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struct comm_point;
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struct comm_reply;
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struct edns_data;
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struct sldns_buffer;
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/** number of qtype that is stored for in array */
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#define STATS_QTYPE_NUM 256
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/** number of qclass that is stored for in array */
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#define STATS_QCLASS_NUM 256
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/** number of rcodes in stats */
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#define STATS_RCODE_NUM 16
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/** number of opcodes in stats */
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#define STATS_OPCODE_NUM 16
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/** per worker statistics */
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struct server_stats {
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/** number of queries from clients received. */
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size_t num_queries;
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/** number of queries that had a cache-miss. */
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size_t num_queries_missed_cache;
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/** number of prefetch queries - cachehits with prefetch */
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size_t num_queries_prefetch;
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/**
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* Sum of the querylistsize of the worker for
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* every query that missed cache. To calculate average.
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*/
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size_t sum_query_list_size;
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/** max value of query list size reached. */
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size_t max_query_list_size;
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/** Extended stats below (bool) */
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int extended;
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/** qtype stats */
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size_t qtype[STATS_QTYPE_NUM];
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/** bigger qtype values not in array */
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size_t qtype_big;
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/** qclass stats */
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size_t qclass[STATS_QCLASS_NUM];
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/** bigger qclass values not in array */
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size_t qclass_big;
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/** query opcodes */
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size_t qopcode[STATS_OPCODE_NUM];
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/** number of queries over TCP */
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size_t qtcp;
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/** number of outgoing queries over TCP */
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size_t qtcp_outgoing;
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/** number of queries over IPv6 */
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size_t qipv6;
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/** number of queries with QR bit */
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size_t qbit_QR;
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/** number of queries with AA bit */
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size_t qbit_AA;
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/** number of queries with TC bit */
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size_t qbit_TC;
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/** number of queries with RD bit */
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size_t qbit_RD;
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/** number of queries with RA bit */
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size_t qbit_RA;
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/** number of queries with Z bit */
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size_t qbit_Z;
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/** number of queries with AD bit */
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size_t qbit_AD;
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/** number of queries with CD bit */
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size_t qbit_CD;
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/** number of queries with EDNS OPT record */
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size_t qEDNS;
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/** number of queries with EDNS with DO flag */
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size_t qEDNS_DO;
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/** answer rcodes */
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size_t ans_rcode[STATS_RCODE_NUM];
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/** answers with pseudo rcode 'nodata' */
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size_t ans_rcode_nodata;
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/** answers that were secure (AD) */
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size_t ans_secure;
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/** answers that were bogus (withheld as SERVFAIL) */
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size_t ans_bogus;
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/** rrsets marked bogus by validator */
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size_t rrset_bogus;
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/** unwanted traffic received on server-facing ports */
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size_t unwanted_replies;
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/** unwanted traffic received on client-facing ports */
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size_t unwanted_queries;
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/** usage of tcp accept list */
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size_t tcp_accept_usage;
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/** histogram data exported to array
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* if the array is the same size, no data is lost, and
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* if all histograms are same size (is so by default) then
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* adding up works well. */
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size_t hist[NUM_BUCKETS_HIST];
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/** number of message cache entries */
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size_t msg_cache_count;
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/** number of rrset cache entries */
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size_t rrset_cache_count;
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/** number of infra cache entries */
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size_t infra_cache_count;
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/** number of key cache entries */
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size_t key_cache_count;
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};
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/**
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* Statistics to send over the control pipe when asked
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* This struct is made to be memcpied, sent in binary.
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*/
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struct stats_info {
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/** the thread stats */
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struct server_stats svr;
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/** mesh stats: current number of states */
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size_t mesh_num_states;
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/** mesh stats: current number of reply (user) states */
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size_t mesh_num_reply_states;
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/** mesh stats: number of reply states overwritten with a new one */
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size_t mesh_jostled;
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/** mesh stats: number of incoming queries dropped */
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size_t mesh_dropped;
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/** mesh stats: replies sent */
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size_t mesh_replies_sent;
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/** mesh stats: sum of waiting times for the replies */
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struct timeval mesh_replies_sum_wait;
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/** mesh stats: median of waiting times for replies (in sec) */
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double mesh_time_median;
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};
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/**
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* Initialize server stats to 0.
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* @param stats: what to init (this is alloced by the caller).
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* @param cfg: with extended statistics option.
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*/
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void server_stats_init(struct server_stats* stats, struct config_file* cfg);
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/** add query if it missed the cache */
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void server_stats_querymiss(struct server_stats* stats, struct worker* worker);
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/** add query if was cached and also resulted in a prefetch */
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void server_stats_prefetch(struct server_stats* stats, struct worker* worker);
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/** display the stats to the log */
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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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* Obtain the stats info for a given thread. Uses pipe to communicate.
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* @param worker: the worker that is executing (the first worker).
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* @param who: on who to get the statistics info.
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* @param s: the stats block to fill in.
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* @param reset: if stats can be reset.
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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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* Compile stats into structure for this thread worker.
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* Also clears the statistics counters (if that is set by config file).
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* @param worker: the worker to compile stats for, also the executing worker.
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* @param s: stats block.
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* @param reset: if true, depending on config stats are reset.
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* if false, statistics are not reset.
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*/
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void server_stats_compile(struct worker* worker, struct stats_info* s,
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int reset);
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/**
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* Send stats over comm tube in reply to query cmd
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* @param worker: this worker.
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* @param reset: if true, depending on config stats are reset.
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* if false, statistics are not reset.
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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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* Addup stat blocks.
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* @param total: sum of the two entries.
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* @param a: to add to it.
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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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* Add stats for this query
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* @param stats: the stats
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* @param c: commpoint with type and buffer.
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* @param qtype: query type
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* @param qclass: query class
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* @param edns: edns record
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* @param repinfo: reply info with remote address
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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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* Add rcode for this query.
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* @param stats: the stats
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* @param buf: buffer with rcode. If buffer is length0: not counted.
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*/
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void server_stats_insrcode(struct server_stats* stats, struct sldns_buffer* buf);
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#endif /* DAEMON_STATS_H */
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