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/*
* daemon/stats.h - collect runtime performance indicators.
*
* Copyright (c) 2007, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
*
* This file describes the data structure used to collect runtime performance
* numbers. These 'statistics' may be of interest to the operator.
*/
#ifndef DAEMON_STATS_H
#define DAEMON_STATS_H
#include "util/timehist.h"
struct worker;
struct config_file;
struct comm_point;
struct comm_reply;
struct edns_data;
struct sldns_buffer;
/* stats struct */
#include "libunbound/unbound.h"
/**
* Initialize server stats to 0.
* @param stats: what to init (this is alloced by the caller).
* @param cfg: with extended statistics option.
*/
void server_stats_init(struct ub_server_stats* stats, struct config_file* cfg);
/** add query if it missed the cache */
void server_stats_querymiss(struct ub_server_stats* stats, struct worker* worker);
/** add query if was cached and also resulted in a prefetch */
void server_stats_prefetch(struct ub_server_stats* stats, struct worker* worker);
/** display the stats to the log */
void server_stats_log(struct ub_server_stats* stats, struct worker* worker,
int threadnum);
/**
* Obtain the stats info for a given thread. Uses pipe to communicate.
* @param worker: the worker that is executing (the first worker).
* @param who: on who to get the statistics info.
* @param s: the stats block to fill in.
* @param reset: if stats can be reset.
*/
void server_stats_obtain(struct worker* worker, struct worker* who,
struct ub_stats_info* s, int reset);
/**
* Compile stats into structure for this thread worker.
* Also clears the statistics counters (if that is set by config file).
* @param worker: the worker to compile stats for, also the executing worker.
* @param s: stats block.
* @param reset: if true, depending on config stats are reset.
* if false, statistics are not reset.
*/
void server_stats_compile(struct worker* worker, struct ub_stats_info* s,
int reset);
/**
* Send stats over comm tube in reply to query cmd
* @param worker: this worker.
* @param reset: if true, depending on config stats are reset.
* if false, statistics are not reset.
*/
void server_stats_reply(struct worker* worker, int reset);
/**
* Addup stat blocks.
* @param total: sum of the two entries.
* @param a: to add to it.
*/
void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a);
/**
* Add stats for this query
* @param stats: the stats
* @param c: commpoint with type and buffer.
* @param qtype: query type
* @param qclass: query class
* @param edns: edns record
* @param repinfo: reply info with remote address
*/
void server_stats_insquery(struct ub_server_stats* stats, struct comm_point* c,
uint16_t qtype, uint16_t qclass, struct edns_data* edns,
struct comm_reply* repinfo);
/**
* Add rcode for this query.
* @param stats: the stats
* @param buf: buffer with rcode. If buffer is length0: not counted.
*/
void server_stats_insrcode(struct ub_server_stats* stats, struct sldns_buffer* buf);
/**
* Add DNS Cookie stats for this query
* @param stats: the stats
* @param edns: edns record
*/
void server_stats_downstream_cookie(struct ub_server_stats* stats,
struct edns_data* edns);
#endif /* DAEMON_STATS_H */
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