* Perl plugin: Init callbacks have been changed to run essentially
single-threaded to avoid race conditions by init functions which
create additional threads. Thanks to Pavel Rochnyack. #1706
- * PF plugin and DNS plugin: These plugins have been fixed to build
- properly on OpenBSD again. Thanks to Ruben Kerkhof.
-- * Processes plugin: A compilation error on systems without "regex.h" has
-- been fixed. Thanks to Corey Kosak.
-- * Processes plugin: A memory leak on Solaris has been fixed. Thanks to
-- Jim Quinn.
+ * Processes plugin: A warning about too long process names has been
+ added. Thanks to Marc Fournier. #1284
+ * Redis plugin: A memory leak in an error handling code path has been
+ fixed. Thanks to Andrés J. Díaz.
+ * Redis plugin: The data source type of the expired_keys metric has been
+ corrected to "DERIVE". Thanks to Marc Falzon and Marc Fournier. #1483.
+ * SMART plugin: A build dependency on libudev has been added. Thanks to
+ Pavel Rochnyack. #1724
+ * StatsD plugin: A deadlock on plugin shutdown has been fixed. Thanks to
+ Pavel Rochnyack #1703
+ * Write HTTP plugin: Freeing of memory holding HTTP headers during
+ shutdown has been fixed. Thanks to Tolga Ceylan.
+ * Write Sensu plugin: A segfault when the Tag was unset has been fixed.
+ Thanks to Marc Fournier.
+ * ZFS ARC plugin: The cache_operation-stolen metric has been removed for
+ FreeBSD 10.2 and later. Thanks to Ruben Kerkhof. #1580
+
+2016-01-22, Version 5.5.1
+ * Build system: Compilation errors have been avoided by correctly
+ defining package name and version used by autoconf. Thanks to Nathan
+ Berkley. #1063
+ * Build system: Dependency ordering was fixed to ensure parallel builds
+ work reliably. Thanks to Gustavo Zacarias. #1125
+ * Build system: Error messages have been improved and building the unit
+ tests has been fixed on Solaris. Thanks to Florian Forster and
+ Dagobert Michelsen. #1077
+ * Build system: The move of the "utils_ignorelist" functions has been
+ reverted. This fixes build issues of numerous plugins. Thanks to
+ Benjamin Drung;. #1323
+ * Build system: The fhcount plugin has been restricted to Linux. Thanks
+ to Ruben Kerkhof. #1195
+ * Build system: Detection of header files for the turbostat plugin has
+ been fixed. Thanks to Marc Fournier. #1075
+ * collectd: The "LC_NUMERIC" locale is now forced, to prevent issues
+ with some plugins on environments using a comma as decimal separator.
+ Thanks to Florian Forster. #1237
+ * Documentation: Some precisions related to the virt plugin have beed
+ added. Thanks to Wojtek Bocer and Ruben Kerkhof.
+ * Documentation: The CollectdInternalStats documentation has been
+ improved. Thanks to Yves Mettier and Florian Forster.
+ * Battery plugin: A missing Type has been added. Thanks to Marc
+ Fournier. #1338
+ * Bind plugin: An off-by-one error has been fixed: an index was checked
+ against a wrong variable, which may lead to an out-of-bounds read.
+ Thanks to Michal Humpula. #1123
+ * Ceph plugin: JSON parsing has been refactored to support ceph 10.0.0
+ and fixes several buffer overflows. Thanks to Florian Forster. #1350
+ * CPU plugin: A Mac OS X specific bug has been fixed: the plugin
+ expected an incorrect number of CPU states, resulting in failing read
+ callbacks. This regression was introduced in 5.5.0. Thanks to Robert
+ Viduya.
+ * Disk plugin: Support for Mac OS X 10.10 has been added. Thanks to
+ Robert Viduya. #1065
+ * IPC plugin: Support for building with musl-libc has been added. Thanks
+ to Natanael Copa. #1147
+ * Log Logstash plugin: A segfault when using libyajl, version 1 was
+ fixed. Thanks to Vincent Bernat. #1190
+ * Log Logstash plugin: The timestamp is now ISO 8601 compliant. Thanks
+ to Marc Fournier. #1132
+ * memcached plugin: The Type of the listen-disabled metric was fixed.
+ Thanks to Florian Forster. #1356
+ * MySQL plugin: The Type used by Innodb_buffer_pool_pages_flushed was
+ fixed. Thanks to Marek Becka. #1085
+ * OpenLDAP plugin: A crash when using LDAPI (LDAP-over-IPC) got fixed.
+ Thanks to Marek Becka. #1080
+ * OpenLDAP plugin: Support for Mac OS X has been added. Thanks to Ruben
+ Kerkhof. #1489
+ * SMART plugin: A memory leak has been fixed. Thanks to Florian
+ Schüller and Pierre-Yves Ritschard. #1076
+ * Swap plugin: A regression that would lead to swap usage being reported
+ in kilobytes (instead of bytes) has been fixed. Thanks to Marek Becka.
+ #1071
+ * Varnish plugin: Support for FreeBSD has been added. Thanks to Ruben
+ Kerkhof. #1182
+ * Varnish plugin: Support for versions 3 and 4 has been made more
+ tolerant to minor changes in Varnish point releases. Thanks to Marc
+ Fournier. #1302
+ * virt plugin: A copy-and-paste mistake in an error message has been
+ fixed. Thanks to Ruben Kerkhof. #1101
+ * Write Kafka plugin: Support for Solaris has been added. Thanks to
+ Shahul Hameed. #1171
+ * Write Redis plugin: Dead code has been removed. Thanks to Brian Kelly.
+ #1143
+ * 27 patches have been applied to numerous plugins and core components,
+ fixing various programming errors which were reported by scan-build,
+ libasan, FBInfer, coverity-scan and clang: Thanks to Ruben Kerkhof,
+ Florian Forster and Marek Becka.
+ * Collectd::Unixsock: A Perl error got corrected. Thanks to Ciaran Mac
+ An Iomaire. #1295
+
+2015-05-27, Version 5.5.0
+ * Build system: Ability to make out-of-tree builds has been fixed.
+ Thanks to Vincent Bernat. #792
+ * Build system, Disk and Users plugins: Detection and use of libstatgrab
+ ≧ 0.90 has been added. Thanks to Vincent Bernat. #445, #795, #806,
+ #807, #908
+ * Build system, Memory, CPU, TCPConns and Processes plugins: Numerous
+ fixes related to OpenBSD support have been added. Thanks to Landry
+ Breuil. #777, #778, #779, #808
+ * Build system: Plugins now only export "module_register()". Thanks to
+ Florian Forster.
+ * Build system: Various cleanups and improvements have been done. Thanks
+ to Marc Fournier.
+ * collectd: Numerous internal changes and improvements to the daemon and
+ the plugin API have been make. Thanks to Florian Forster, Pierre-Yves
+ Ritschard and Alex Petrov. #512, #727
+ * collectd: Numerous spelling mistakes have been corrected in comments
+ and documentation and several error messages have been improved.
+ Thanks to Ruben Kerkhof, Abhinav Upadhyay, Olivier Bazoud, Pierre-Yves
+ Ritschard, Tim Smith, Moshe Zada, Katelyn Perry and Marc Fournier.
+ * collectd: Rules/Targets can now be appended to existing Filter Chains.
+ Thanks to Marc Falzon. #444
+ * collectd: Failing Filter Chains destinations will now log the list of
+ available write targets. Thanks to Wilfried Goesgens. #650, #1043
+ * collectd: Support for process signaling and management by upstart and
+ systemd has been implemented for the Linux platform. Thanks to
+ Pierre-Yves Ritschard and Marc Fournier. #798, #811, #814
+ * collectd: The "CollectInternalStats" option has been added. Thanks to
+ Yves Mettier. #691
+ * collectd: The daemon source code and dependencies have moved to the
+ "src/daemon/" directory. Thanks to Florian Forster.
+ * collectd: The new "MaxReadInterval" option allows to cap the
+ exponential retry interval of plugins read errors. Thanks to Alexey
+ Remizov and Florian Forster. #713
+ * collectd: The "-P" command-line option now has precedence over the
+ "PIDFile" option. Thanks to Thomas D. #553
+ * collection.cgi: Various data-source related adjustments have been
+ made. Thanks to Fabiano Pires and Sebastian Harl.
+ * libcollectdclient: Now propagates errors when signing / encrypting
+ network packets. Thanks to Florian Forster.
+ * Configuration: Support for unquoted IPv6 addresses has been added.
+ Thanks to Sebastian Harl. #489
+ * Documentation: Various improvements have been done. Thanks to Florian
+ Forster and Marc Fournier.
+ * Examples: the sample C plugin has been updated to the current plugin
+ API. Thanks to Sebastian Harl.
+ * Licensing: The following components have been relicensed to the MIT
+ license: the Apple Sensors, Ascent, DBI, E-Mail, Entropy, GenericJMX,
+ gmond, LogFile, nginx, Notify Desktop, NTPd, NUT, olsrd, Perl, Ping,
+ PostgreSQL, Protocols, RouterOS, RRDCacheD, SNMP, StatsD, SysLog,
+ Table, Tail, UnixSock, vmem, VServer, Wireless, Write Riemann and XMMS
+ plugins, the core collectd daemon, the collectdmon, collectd-nagios
+ and collectd-tg utilities, all the Targets and Matches, liboconfig,
+ most of the "utils_*" files and the plugin API.
+ * Tests: A test suite has been added. Thanks to Florian Forster.
+ * Threshold: The hysteresis calculation has been made more reliable.
+ Thanks to Jan Kundrát. #581
+ * Threshold: Various fixes and improvements have been made. Thanks to
+ Manuel Luis Sanmartín Rozada. #649, #644
+ * AMQP plugin: The "ConnectionRetryDelay" option has been added,
+ allowing to delay reconnection. Thanks to Yoga Ramalingam and Marc
+ Fournier. #833
+ * AMQP plugin: The "QueueDurable" and "QueueAutoDelete" options have
+ been added, giving control over queue creation and deletion. Thanks to
+ David Blundell and Marc Fournier. #623
+ * Apache, Ascent, BIND, cURL, cURL-JSON, cURL-XML, nginx and Write HTTP
+ plugins: Customizing the "User-Agent" field is now possible at
+ compile-time. Thanks to Jeremy Katz. #440
+ * Apache, Ascent, BIND, cURL, cURL-JSON, cURL-XML, nginx plugins: The
+ connection will be reset if it hasn't completed within the configured
+ "Interval". The new "Timeout" option gives control over this behavior.
+ Thanks to Jan Kundrát and Marc Fournier. #982, #983, #993
+ * Apache, Ascent, cURL, cURL-JSON, cURL-XML, nginx, Write HTTP plugins:
+ Allow usernames and passwords to contain colons if built against
+ libcurl ≧ 7.19.1. Thanks to Marc Fournier. #695, #947
+ * Apache plugin: The "SSLCiphers" option gives control over the
+ encryption algorithms to use with TLS connections. Thanks to Toni
+ Moreno. #946
+ * Barometer plugin: This new plugin reads sensor data from various
+ Freescale and Bosch digital barometers. Thanks to Tomas Menzl. #69,
+ #693
+ * Battery plugin: Reporting values as percentages and reporting degraded
+ batteries has been added. Thanks to Florian Forster.
+ * Battery plugin: Support for reading values from sysfs on Linux has
+ been added. Thanks to Andy Parkins, Nicholas Humfrey, Peter Wu and
+ Florian Forster. #725, #810, #998
+ * Battery plugin: The value for current is no longer supplied unless the
+ battery provides this information. Thanks to Florian Forster.
+ * BIND plugin: Bind's XML v3 API is now supported; Thanks to Victor
+ Berger, Bruno Prémont and Michal Humpula. #742, #847
+ * Ceph plugin: This new plugin collects statistics from the Ceph
+ distributed storage system. Thanks to Dan Ryder, Dennis Zou, Colin
+ McCabe, Sage Weil. #522, #598
+ * ConnTrack plugin: Support for reporting values as percentages as well
+ as legacy conntrack files in "/proc" has been added. Thanks to
+ Pierre-Yves Ritschard. #497, #680
+ * CPU plugin: The plugin is now able to report values as percentages and
+ aggregate values per-state and per-CPU. Thanks to Pierre-Yves
+ Ritschard, Florian Forster, Fabien Wernli, Nicholas Humfrey and
+ Wilfried Goesgens. #499, #516, #639 #734, #812, #802
+ * cURL-JSON plugin: Extracting values from complex JSON structures has
+ been enhanced. Thanks to Jim Radford. #408, #411
+ * cURL-JSON plugin: Intervals can now be configured on a per-URL basis.
+ Thanks to Stan Sawa. #685
+ * cURL-JSON, cURL-XML, Write HTTP plugins: These plugins now also follow
+ HTTP redirects. Thanks to Marc Fournier.
+ * cURL, cURL-JSON, cURL-XML plugins: HTTP Digest authentication has been
+ implemented. Thanks to Frank Cornelis. #482
+ * DBI, Oracle, PostgreSQL plugins: A "MetadataFrom" parameter has been
+ added which allows to set metadata from database columns. Thanks to
+ Mark Wong. #317, #321
+ * DBI plugin: Querying several databases in parallel is now possible.
+ Thanks to Vincent Bernat. #453
+ * Disk plugin: On the Linux platform, disk names can now get looked up
+ in udev with the "UdevNameAttr" option. Thanks to Patrick Mooney. #537
+ * Disk plugin: This plugin now collects several additional I/O-related
+ metrics on the Linux platform. Thanks to Florian Forster and Michael
+ Schenck. #705, #759
+ * DRBD plugin: This new plugin reads Linux's Distributed Replicated
+ Block Device (DRBD) statistics. Thanks to Tim Laszlo. #566, #700
+ * Exec, UnixSock plugins: The "PUTNOTIF" command now allows to set
+ metadata on notifications. Thanks to John-John Tedro. #416
+ * fhcount plugin: This new plugin reports the number of used file
+ handles. Thanks to Jiri Tyr. #1009
+ * GenericJMX plugin: A Class Loader for "JMXConnectorFactory" has been
+ added, allowing the plugin to work with JBOSS > 7. Thanks to Alexandre
+ Moutot. #452
+ * IPC plugin: This new plugin collects information related to shared
+ memory. Thanks to Andrés J. Díaz. #925
+ * Java plugin: Now uses the hostname defined in the configuration file.
+ Thanks to Pierre-Yves Ritschard. #530, #681
+ * Load plugin: The plugin is now able to report values as percentages.
+ Thanks to Vedran Bartonicek and Pierre-Yves Ritschard. #344, #498
+ * Log Logstash plugin: This new plugin writes collectd logs and events
+ as Logstash JSON formatted events. Thanks to Pierre-Yves Ritschard.
+ #360
+ * LVM plugin: The plugin collects thin pool data volumes size, and no
+ longer reports virtual volumes. Thanks to Benjamin Gilbert. #603
+ * memcached plugin: "listen_disabled_num" are now also reported. Thanks
+ to Matt Cottingham. #622
+ * Memory plugin: Slab memory reporting on the Linux platform has been
+ added. Thanks to Manuel CISSÉ and Marc Fournier. #560, #697
+ * Memory plugin: The plugin is now able to report values as percentages.
+ Thanks to Jeremy Katz, Florian Forster and Manuel CISSÉ. #501, #511,
+ #559
+ * Modbus plugin: Selecting between holding and input registers is now
+ possible. Thanks to Jan Vitek. #338
+ * Modbus plugin: Support for accessing devices through an RS-485 serial
+ port has been added. Thanks to Eric Sandeen.
+ * Multimeter plugin: This plugin isn't built by default on the AIX
+ platform anymore. Thanks to Manuel Luis Sanmartin Rozada. #549, #684
+ * MySQL and PostgreSQL plugins: Passing "127.0.0.1" as a host will now
+ result in the global Hostname being used in metric names. Thanks to
+ Jeremy Katz. #441
+ * MySQL plugin: InnoDB, Select and Sort statistics collection has been
+ added. Thanks to Wilson Felipe, Marek Becka and Pierre-Yves Ritschard.
+ #248, #621, #699, #824
+ * MySQL plugin: The "Alias" and "ConnectTimeout" options have been
+ added. Thanks to William Tisäter.
+ * Netlink plugin: Support for 64bit netlink counters has been added.
+ Thanks to Marek Becka. #435
+ * Network plugin: The "ReconnectInterval" configuration option has been
+ added. Thanks to John Ferlito. #732
+ * NFS plugin: Support for NFSv4.0 has been implemented. Thanks to Marek
+ Becka. #550
+ * OneWire plugin: Support for more temperature-providing sensor families
+ has been added. Thanks to Tomasz Torcz. #672
+ * OneWire plugin: Support for full OWFS path and more device families
+ has been implemented. Thanks to Tomas Menzl. #68
+ * OpenLDAP plugin: This new plugin reads monitoring information from
+ OpenLDAP's "cn=Monitor" subtree. Thanks to Kimo Rosenbaum, Marc
+ Fournier and Nicholas Humfrey. #719
+ * OpenVPN plugin: Support for OpenVPN 2.3.0 has been implemented. Thanks
+ to Ed Okerson. #252
+ * OpenVZ plugin: Various improvements have been made, making the plugin
+ report values like the other collectd plugins do. Thanks to Chris
+ Lundquist. #264
+ * Perl plugin: A new "listval_filter" method has been added, various
+ internal cleanups and improvements have been made and a test suite has
+ been added. Thanks to Matthias Bethke. #728
+ * PostgreSQL plugin: The new "ExpireDelay" option allows skipping older
+ values pending write when the database slows down. Thanks to Stephen
+ O'Dor. #593
+ * PowerDNS plugin: The plugin was updated for stats from pdns 3.4.3.
+ Thanks to Ruben Kerkhof. #965
+ * Processes plugin: A memory-usage related optimization for low-profile
+ systems has been added. Thanks to Florian Forster. #652
+ * Python plugin: Support for Python3 has been improved, "ModulePath" is
+ now prepended to "sys.path", and the "get_dataset()" function has been
+ added to the Python API. Thanks to Sven Trenkel and Patrick Browne.
+ #890, #751, #771
+ * Redis and Write_Redis plugins: The support library has been switched
+ from credis to hiredis. Thanks to Andrés J. Díaz, Victor Seva, Marc
+ Fournier, Johan Bergström, Michael Spiegle and brianpkelly. #296,
+ #464, #475, #799, #1030
+ * Redis plugin: Custom commands can now be used to fetch values stored
+ in Redis. Thanks to Pierre-Yves Ritschard. #816
+ * Redis plugin: Support for passwords up to 512 characters long has been
+ added. Thanks to Jeremy Katz. #532
+ * Sensors plugin: Support for lm_sensors' power sensors has been added.
+ Thanks to Jan Kundrát. #571
+ * SMART plugin: This new plugin collects SMART statistics from disk
+ drives. Thanks to Vincent Bernat. #797
+ * SNMP plugin: A blacklist/whitelist feature can now be used to filter
+ which OIDs to collect. Thanks to Christophe Courtaut. #414
+ * SNMP plugin: SNMPv3 authentication and encryption support has been
+ implemented. Thanks to Michael Pilat. #362
+ * SNMP plugin: Two error messages have been disambiguated. Thanks to
+ Sergey. #939, #952
+ * Swap plugin: The plugin is now able to report values as percentages.
+ Thanks to Jeremy Katz and Florian Forster. #500, #510
+ * Swap plugin: The plugin no longer fails on Linux systems where
+ "SwapCached" isn't exposed by the kernel. Thanks to Florian Forster.
+ #733
+ * Tail plugin: "GaugeInc" and "GaugeAdd" options have been implemented.
+ Thanks to Andre Ferraz. #673
+ * Tail plugin: Intervals can now be configured on a per-File basis.
+ Thanks to Tom Leaman. #446
+ * TCPConns plugin: The "AllPortsSummary" option, allowing to summarize
+ all connections, has been added. Thanks to Marek Becka. #488
+ * TCPConns plugin: Three metrics were renamed on the AIX platform, for
+ the sake of consistency. Thanks to Manuel Luis Sanmartín Rozada. #546
+ * Turbostat plugin: This new plugin reads CPU frequency and C-state
+ residency on modern Intel turbo-capable processors. Thanks to Vincent
+ Brillault, Jean Delvare and Nicolas Iooss. #651
+ * UnixSock plugin: The "GETTHRESHOLD" command has been re-added. Thanks
+ to Manuel Luis Sanmartín Rozada. #674
+ * Varnish plugin: Varnish 4 support has been added, as well as as
+ monitoring metrics only available in Varnish 4. Thanks to Marc
+ Fournier. #618, #783
+ * virt plugin: Guests memory usage is now also collected. Thanks to
+ Tiago Carvalho, jazzmes and Zollner Robert.
+ * virt plugin: It is now possible to chose between using guests' name or
+ UUID as plugin_instance. Thanks to Remi Ferrand. #385
+ * virt plugin: The libvirt plugin has been renamed to virt. Thanks to
+ Florian Forster.
+ * Write Graphite plugin: When the connection to graphite fails,
+ reconnection attempts are now limited to once per second. Thanks to
+ Florian Forster. #625
+ * Write HTTP plugin: Multi-instance support of this plugin has been
+ improved. The "<URL "url">" block has been deprecated in favor of
+ "<Node "identifier">". Thanks to Marc Fournier. #902
+ * Write HTTP plugin: Several TLS-related configuration options have been
+ added. Thanks to Ingmar Runge. #666
+ * Write HTTP plugin: The "LowSpeedLimit" and "Timeout" options allow to
+ reset slow/stalled network connections. Thanks to loginator17 and Marc
+ Fournier. #752, #985
+ * Write HTTP plugin: The size of the payload posted to the HTTP server
+ can now be controlled with the "BufferSize" option. Thanks to Florian
+ Forster. #722
+ * Write Kafka plugin: This new plugin sends data to Apache Kafka, a
+ distributed messaging queue. Thanks to Pierre-Yves Ritschard,
+ ciomaire, Vincent Bernat, Marc Fournier. #670, #694, #794, #853, #014
+ * Write Log plugin: This new plugin dispatches collected values to the
+ configured log destination(s). Thanks to Pierre-Yves Ritschard. #886
+ * Write Riemann plugin: Extra meta strings are now added as attributes
+ in notifications. Thanks to John-John Tedro. #417
+ * Write Riemann plugin: Notification message are now sent to the Riemann
+ server via the description field. Thanks to Adrian Miron. #575
+ * Write Riemann plugin: Support for custom attributes has been added.
+ Thanks to Pierre-Yves Ritschard. #459
+ * Write Riemann plugin: Support had been implemented for sending events
+ to Riemann in batches (when using TCP), and is enabled by default.
+ Thanks to Pierre-Yves Ritschard. #800
+ * Write Riemann plugin: The "EventServicePrefix" option has been added,
+ which adds a prefix to event service names. Thanks to Moshe Zada. #706
+ * Write Riemann plugin: Threshold checks can now be passed down to the
+ Riemann server. Thanks to Pierre-Yves Ritschard. #518
+ * Write Sensu plugin: This new plugin submits values to Sensu, a stream
+ processing and monitoring system. Thanks to Fabrice A. Marie and Marc
+ Fournier. #912, #1001, #1016
+ * Write TSDB plugin: This new plugin sends data to OpenTSDB, a scalable
+ time series database. Thanks to Kevin Bowling, Florian Forster, Dallin
+ Young, Michael Schenck and Pierre-Yves Ritschard. #703, #772, #945
+ * ZFS ARC plugin: Support for ZFS-on-Linux has been added. Thanks to
+ Marc Fournier and Wilfried Goesgens. #552
+ * Zookeeper plugin: This new plugin reads data from the Apache Zookeeper
+ "MNTR" command. Thanks to Jeremy Katz. #826
++=======
+ * Processes plugin and Swap plugin: These plugins have been corrected to
+ also work inside FreeBSD jails. Thanks to biancalana. #1019
+ * Processes plugin: A warning about too long process names has been
+ added. Thanks to Marc Fournier. #1284
+ * Processes plugin: Process counting on the FreeBSD and OpenBSD
+ platforms has been fixed. Thanks to Herve COMMOWICK. #1298
+ * Processes plugin: The plugin was fixed to work properly on Solaris.
+ Thanks to Jan Andres. #919
+ * Python plugin: A double-free bug got fixed. Thanks to Sven Trenkel.
+ #1285
+ * RRDtool plugin: A race condition leading to corrupt RRD file creation
+ has been fixed. Thanks to Manuel Luis Sanmartín Rozada. #1031
+ * SNMP plugin: The "Gauge32" signedness was corrected to match RFC1902.
+ Thanks to Nathan Ward. #1325
+ * StatsD plugin: A deadlock on plugin shutdown has been fixed. Thanks to
+ Pavel Rochnyack #1703
+ * StatsD plugin: A memory leak was corrected. Thanks to Florian Forster.
+ #997
+ * StatsD plugin: A symbol lookup error was fixed by properly linking the
+ plugin against libm. Thanks to Florian Forster.
+ * StatsD plugin: "utils_latency": Support for including values above
+ 1000 in percentile calculation has been added. Thanks to Yoga
+ Ramalingam. #401
+ * StatsD plugin: "utils_latency": Two division by zero error conditions
+ have been corrected. Thanks to Wilfried Goesgens. #655
+ * StatsD plugin: Counters absolute counts are now also reported. Thanks
+ to Pierre-Yves Ritschard. #1311
+ * StatsD plugin: The plugin now emits NaN values when no timer event is
+ recorded. Thanks to Florian Forster. #1038, #1039
+ * StatsD plugin: The plugin was corrected to avoid crashing when
+ negative timer values are submitted. Thanks to Florian Forster. #1131
+ * Tail CSV plugin: The plugin was fixed to work properly with multiple
+ "Collect" options and a bug got fixed when no "TimeFrom" is specified.
+ Thanks to Manuel Luis Sanmartín Rozada and Florian Forster. #1032
+ * TCPConns plugin: A memory leak was fixed. Thanks to Florian Forster.
+ #1074
+ * TCPConns plugin: An bug causing collectd to enter an inifinite loop on
+ OpenBSD was fixed. Thanks to Landry Breuil. #1094
+ * Threshold plugin: Threshold configuration blocks can now be defined in
+ different files. Thanks to Michael Salmon. #551
+ * vmem plugin: Support for pgsteal in recent Linux kernels has been
+ added. Thanks to Jakub Jankowski. #1307
+ * vmem plugin: The DSType for nr_dirtied and nr_written was corrected to
+ report a derive. Thanks to Marek Becka. #1072
+ * Write Graphite plugin: Error handling when submitting metrics to the
+ server is now more robust. Thanks to Sam Pointer. #1364
+ * Write HTTP plugin: Freeing of memory holding HTTP headers during
+ shutdown has been fixed. Thanks to Tolga Ceylan.
+ * Write Redis plugin: Multi-Valued key was made easier to parse by
+ adding a "|" character as a delimiter. Thanks to brianpkelly and
+ Florian Forster. #1070
+ * Write Redis plugin: The timestamp format was corrected. Thanks to
+ Florian Forster.
+ * ZFS ARC plugin: The plugin was will not emit warning about missing
+ "l2_size" stats anymore. Thanks to Jan Andres. #919
+ * 152 patches have been applied to numerous plugins and core components,
+ fixing various programming errors which were reported by scan-build,
+ libasan, FBInfer, coverity-scan, clang and gcc-6: Thanks to Ruben
+ Kerkhof, Florian Forster, Marc Fournier, Corey Kosak, Laurent,
+ Claudius Zingerli and Fabien Wernli.
++>>>>>>> collectd-5.4
2015-02-26, Version 5.4.2
* Build system: Numerous fixes. Thanks to Bjørn Nordbø, Jim Radford,
--- /dev/null
+/**
+ * collectd - src/meta_data.c
+ * Copyright (C) 2008-2011 Florian octo Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Florian octo Forster <octo at collectd.org>
+ **/
+
+#include "collectd.h"
+#include "plugin.h"
+#include "meta_data.h"
+
+#include <pthread.h>
+
+/*
+ * Data types
+ */
+union meta_value_u
+{
+ char *mv_string;
+ int64_t mv_signed_int;
+ uint64_t mv_unsigned_int;
+ double mv_double;
+ _Bool mv_boolean;
+};
+typedef union meta_value_u meta_value_t;
+
+struct meta_entry_s;
+typedef struct meta_entry_s meta_entry_t;
+struct meta_entry_s
+{
+ char *key;
+ meta_value_t value;
+ int type;
+ meta_entry_t *next;
+};
+
+struct meta_data_s
+{
+ meta_entry_t *head;
+ pthread_mutex_t lock;
+};
+
+/*
+ * Private functions
+ */
+static char *md_strdup (const char *orig) /* {{{ */
+{
+ size_t sz;
+ char *dest;
+
+ if (orig == NULL)
+ return (NULL);
+
+ sz = strlen (orig) + 1;
+ dest = (char *) malloc (sz);
+ if (dest == NULL)
+ return (NULL);
+
+ memcpy (dest, orig, sz);
+
+ return (dest);
+} /* }}} char *md_strdup */
+
+static meta_entry_t *md_entry_alloc (const char *key) /* {{{ */
+{
+ meta_entry_t *e;
+
+ e = (meta_entry_t *) malloc (sizeof (*e));
+ if (e == NULL)
+ {
+ ERROR ("md_entry_alloc: malloc failed.");
+ return (NULL);
+ }
+ memset (e, 0, sizeof (*e));
+
+ e->key = md_strdup (key);
+ if (e->key == NULL)
+ {
+ free (e);
+ ERROR ("md_entry_alloc: md_strdup failed.");
+ return (NULL);
+ }
+
+ e->type = 0;
+ e->next = NULL;
+
+ return (e);
+} /* }}} meta_entry_t *md_entry_alloc */
+
+static meta_entry_t *md_entry_clone (const meta_entry_t *orig) /* {{{ */
+{
+ meta_entry_t *copy;
+
+ if (orig == NULL)
+ return (NULL);
+
+ copy = md_entry_alloc (orig->key);
+ if (copy == NULL)
+ return (NULL);
+ copy->type = orig->type;
+ if (copy->type == MD_TYPE_STRING)
+ copy->value.mv_string = strdup (orig->value.mv_string);
+ else
+ copy->value = orig->value;
+
+ copy->next = md_entry_clone (orig->next);
+ return (copy);
+} /* }}} meta_entry_t *md_entry_clone */
+
+static void md_entry_free (meta_entry_t *e) /* {{{ */
+{
+ if (e == NULL)
+ return;
+
+ free (e->key);
+
+ if (e->type == MD_TYPE_STRING)
+ free (e->value.mv_string);
+
+ if (e->next != NULL)
+ md_entry_free (e->next);
+
+ free (e);
+} /* }}} void md_entry_free */
+
+static int md_entry_insert (meta_data_t *md, meta_entry_t *e) /* {{{ */
+{
+ meta_entry_t *this;
+ meta_entry_t *prev;
+
+ if ((md == NULL) || (e == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ prev = NULL;
+ this = md->head;
+ while (this != NULL)
+ {
+ if (strcasecmp (e->key, this->key) == 0)
+ break;
+
+ prev = this;
+ this = this->next;
+ }
+
+ if (this == NULL)
+ {
+ /* This key does not exist yet. */
+ if (md->head == NULL)
+ md->head = e;
+ else
+ {
+ assert (prev != NULL);
+ prev->next = e;
+ }
+
+ e->next = NULL;
+ }
+ else /* (this != NULL) */
+ {
+ if (prev == NULL)
+ md->head = e;
+ else
+ prev->next = e;
+
+ e->next = this->next;
+ }
+
+ pthread_mutex_unlock (&md->lock);
+
+ if (this != NULL)
+ {
+ this->next = NULL;
+ md_entry_free (this);
+ }
+
+ return (0);
+} /* }}} int md_entry_insert */
+
+/* XXX: The lock on md must be held while calling this function! */
+static meta_entry_t *md_entry_lookup (meta_data_t *md, /* {{{ */
+ const char *key)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL))
+ return (NULL);
+
+ for (e = md->head; e != NULL; e = e->next)
+ if (strcasecmp (key, e->key) == 0)
+ break;
+
+ return (e);
+} /* }}} meta_entry_t *md_entry_lookup */
+
+/*
++ * Each value_list_t*, as it is going through the system, is handled by exactly
++ * one thread. Plugins which pass a value_list_t* to another thread, e.g. the
++ * rrdtool plugin, must create a copy first. The meta data within a
++ * value_list_t* is not thread safe and doesn't need to be.
++ *
++ * The meta data associated with cache entries are a different story. There, we
++ * need to ensure exclusive locking to prevent leaks and other funky business.
++ * This is ensured by the uc_meta_data_get_*() functions.
++ */
++
++/*
+ * Public functions
+ */
+meta_data_t *meta_data_create (void) /* {{{ */
+{
+ meta_data_t *md;
+
+ md = (meta_data_t *) malloc (sizeof (*md));
+ if (md == NULL)
+ {
+ ERROR ("meta_data_create: malloc failed.");
+ return (NULL);
+ }
+ memset (md, 0, sizeof (*md));
+
+ md->head = NULL;
+ pthread_mutex_init (&md->lock, /* attr = */ NULL);
+
+ return (md);
+} /* }}} meta_data_t *meta_data_create */
+
+meta_data_t *meta_data_clone (meta_data_t *orig) /* {{{ */
+{
+ meta_data_t *copy;
+
+ if (orig == NULL)
+ return (NULL);
+
+ copy = meta_data_create ();
+ if (copy == NULL)
+ return (NULL);
+
+ pthread_mutex_lock (&orig->lock);
+ copy->head = md_entry_clone (orig->head);
+ pthread_mutex_unlock (&orig->lock);
+
+ return (copy);
+} /* }}} meta_data_t *meta_data_clone */
+
+void meta_data_destroy (meta_data_t *md) /* {{{ */
+{
+ if (md == NULL)
+ return;
+
+ md_entry_free (md->head);
+ pthread_mutex_destroy (&md->lock);
+ free (md);
+} /* }}} void meta_data_destroy */
+
+int meta_data_exists (meta_data_t *md, const char *key) /* {{{ */
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ for (e = md->head; e != NULL; e = e->next)
+ {
+ if (strcasecmp (key, e->key) == 0)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (1);
+ }
+ }
+
+ pthread_mutex_unlock (&md->lock);
+ return (0);
+} /* }}} int meta_data_exists */
+
+int meta_data_type (meta_data_t *md, const char *key) /* {{{ */
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL))
+ return -EINVAL;
+
+ pthread_mutex_lock (&md->lock);
+
+ for (e = md->head; e != NULL; e = e->next)
+ {
+ if (strcasecmp (key, e->key) == 0)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return e->type;
+ }
+ }
+
+ pthread_mutex_unlock (&md->lock);
+ return 0;
+} /* }}} int meta_data_type */
+
+int meta_data_toc (meta_data_t *md, char ***toc) /* {{{ */
+{
+ int i = 0, count = 0;
+ meta_entry_t *e;
+
+ if ((md == NULL) || (toc == NULL))
+ return -EINVAL;
+
+ pthread_mutex_lock (&md->lock);
+
+ for (e = md->head; e != NULL; e = e->next)
+ ++count;
+
+ if (count == 0)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (count);
+ }
+
+ *toc = calloc(count, sizeof(**toc));
+ for (e = md->head; e != NULL; e = e->next)
+ (*toc)[i++] = strdup(e->key);
+
+ pthread_mutex_unlock (&md->lock);
+ return count;
+} /* }}} int meta_data_toc */
+
+int meta_data_delete (meta_data_t *md, const char *key) /* {{{ */
+{
+ meta_entry_t *this;
+ meta_entry_t *prev;
+
+ if ((md == NULL) || (key == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ prev = NULL;
+ this = md->head;
+ while (this != NULL)
+ {
+ if (strcasecmp (key, this->key) == 0)
+ break;
+
+ prev = this;
+ this = this->next;
+ }
+
+ if (this == NULL)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ if (prev == NULL)
+ md->head = this->next;
+ else
+ prev->next = this->next;
+
+ pthread_mutex_unlock (&md->lock);
+
+ this->next = NULL;
+ md_entry_free (this);
+
+ return (0);
+} /* }}} int meta_data_delete */
+
+/*
+ * Add functions
+ */
+int meta_data_add_string (meta_data_t *md, /* {{{ */
+ const char *key, const char *value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL) || (value == NULL))
+ return (-EINVAL);
+
+ e = md_entry_alloc (key);
+ if (e == NULL)
+ return (-ENOMEM);
+
+ e->value.mv_string = md_strdup (value);
+ if (e->value.mv_string == NULL)
+ {
+ ERROR ("meta_data_add_string: md_strdup failed.");
+ md_entry_free (e);
+ return (-ENOMEM);
+ }
+ e->type = MD_TYPE_STRING;
+
+ return (md_entry_insert (md, e));
+} /* }}} int meta_data_add_string */
+
+int meta_data_add_signed_int (meta_data_t *md, /* {{{ */
+ const char *key, int64_t value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL))
+ return (-EINVAL);
+
+ e = md_entry_alloc (key);
+ if (e == NULL)
+ return (-ENOMEM);
+
+ e->value.mv_signed_int = value;
+ e->type = MD_TYPE_SIGNED_INT;
+
+ return (md_entry_insert (md, e));
+} /* }}} int meta_data_add_signed_int */
+
+int meta_data_add_unsigned_int (meta_data_t *md, /* {{{ */
+ const char *key, uint64_t value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL))
+ return (-EINVAL);
+
+ e = md_entry_alloc (key);
+ if (e == NULL)
+ return (-ENOMEM);
+
+ e->value.mv_unsigned_int = value;
+ e->type = MD_TYPE_UNSIGNED_INT;
+
+ return (md_entry_insert (md, e));
+} /* }}} int meta_data_add_unsigned_int */
+
+int meta_data_add_double (meta_data_t *md, /* {{{ */
+ const char *key, double value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL))
+ return (-EINVAL);
+
+ e = md_entry_alloc (key);
+ if (e == NULL)
+ return (-ENOMEM);
+
+ e->value.mv_double = value;
+ e->type = MD_TYPE_DOUBLE;
+
+ return (md_entry_insert (md, e));
+} /* }}} int meta_data_add_double */
+
+int meta_data_add_boolean (meta_data_t *md, /* {{{ */
+ const char *key, _Bool value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL))
+ return (-EINVAL);
+
+ e = md_entry_alloc (key);
+ if (e == NULL)
+ return (-ENOMEM);
+
+ e->value.mv_boolean = value;
+ e->type = MD_TYPE_BOOLEAN;
+
+ return (md_entry_insert (md, e));
+} /* }}} int meta_data_add_boolean */
+
+/*
+ * Get functions
+ */
+int meta_data_get_string (meta_data_t *md, /* {{{ */
+ const char *key, char **value)
+{
+ meta_entry_t *e;
+ char *temp;
+
+ if ((md == NULL) || (key == NULL) || (value == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ e = md_entry_lookup (md, key);
+ if (e == NULL)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ if (e->type != MD_TYPE_STRING)
+ {
+ ERROR ("meta_data_get_string: Type mismatch for key `%s'", e->key);
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ temp = md_strdup (e->value.mv_string);
+ if (temp == NULL)
+ {
+ pthread_mutex_unlock (&md->lock);
+ ERROR ("meta_data_get_string: md_strdup failed.");
+ return (-ENOMEM);
+ }
+
+ pthread_mutex_unlock (&md->lock);
+
+ *value = temp;
+
+ return (0);
+} /* }}} int meta_data_get_string */
+
+int meta_data_get_signed_int (meta_data_t *md, /* {{{ */
+ const char *key, int64_t *value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL) || (value == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ e = md_entry_lookup (md, key);
+ if (e == NULL)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ if (e->type != MD_TYPE_SIGNED_INT)
+ {
+ ERROR ("meta_data_get_signed_int: Type mismatch for key `%s'", e->key);
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ *value = e->value.mv_signed_int;
+
+ pthread_mutex_unlock (&md->lock);
+ return (0);
+} /* }}} int meta_data_get_signed_int */
+
+int meta_data_get_unsigned_int (meta_data_t *md, /* {{{ */
+ const char *key, uint64_t *value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL) || (value == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ e = md_entry_lookup (md, key);
+ if (e == NULL)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ if (e->type != MD_TYPE_UNSIGNED_INT)
+ {
+ ERROR ("meta_data_get_unsigned_int: Type mismatch for key `%s'", e->key);
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ *value = e->value.mv_unsigned_int;
+
+ pthread_mutex_unlock (&md->lock);
+ return (0);
+} /* }}} int meta_data_get_unsigned_int */
+
+int meta_data_get_double (meta_data_t *md, /* {{{ */
+ const char *key, double *value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL) || (value == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ e = md_entry_lookup (md, key);
+ if (e == NULL)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ if (e->type != MD_TYPE_DOUBLE)
+ {
+ ERROR ("meta_data_get_double: Type mismatch for key `%s'", e->key);
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ *value = e->value.mv_double;
+
+ pthread_mutex_unlock (&md->lock);
+ return (0);
+} /* }}} int meta_data_get_double */
+
+int meta_data_get_boolean (meta_data_t *md, /* {{{ */
+ const char *key, _Bool *value)
+{
+ meta_entry_t *e;
+
+ if ((md == NULL) || (key == NULL) || (value == NULL))
+ return (-EINVAL);
+
+ pthread_mutex_lock (&md->lock);
+
+ e = md_entry_lookup (md, key);
+ if (e == NULL)
+ {
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ if (e->type != MD_TYPE_BOOLEAN)
+ {
+ ERROR ("meta_data_get_boolean: Type mismatch for key `%s'", e->key);
+ pthread_mutex_unlock (&md->lock);
+ return (-ENOENT);
+ }
+
+ *value = e->value.mv_boolean;
+
+ pthread_mutex_unlock (&md->lock);
+ return (0);
+} /* }}} int meta_data_get_boolean */
+
+/* vim: set sw=2 sts=2 et fdm=marker : */
projects / collectd.git / commitdiff