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Diffstat (limited to 'database/rrd.h')
| -rw-r--r-- | database/rrd.h | 886 |
1 files changed, 886 insertions, 0 deletions
diff --git a/database/rrd.h b/database/rrd.h new file mode 100644 index 000000000..19eb100cd --- /dev/null +++ b/database/rrd.h @@ -0,0 +1,886 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_RRD_H +#define NETDATA_RRD_H 1 + +// forward typedefs +typedef struct rrdhost RRDHOST; +typedef struct rrddim RRDDIM; +typedef struct rrdset RRDSET; +typedef struct rrdvar RRDVAR; +typedef struct rrdsetvar RRDSETVAR; +typedef struct rrddimvar RRDDIMVAR; +typedef struct rrdcalc RRDCALC; +typedef struct rrdcalctemplate RRDCALCTEMPLATE; +typedef struct alarm_entry ALARM_ENTRY; + +#include "../daemon/common.h" +#include "web/api/queries/query.h" +#include "rrdvar.h" +#include "rrdsetvar.h" +#include "rrddimvar.h" +#include "rrdcalc.h" +#include "rrdcalctemplate.h" + +#define UPDATE_EVERY 1 +#define UPDATE_EVERY_MAX 3600 + +#define RRD_DEFAULT_HISTORY_ENTRIES 3600 +#define RRD_HISTORY_ENTRIES_MAX (86400*365) + +extern int default_rrd_update_every; +extern int default_rrd_history_entries; +extern int gap_when_lost_iterations_above; + +#define RRD_ID_LENGTH_MAX 200 + +#define RRDSET_MAGIC "NETDATA RRD SET FILE V019" +#define RRDDIMENSION_MAGIC "NETDATA RRD DIMENSION FILE V019" + +typedef long long total_number; +#define TOTAL_NUMBER_FORMAT "%lld" + +// ---------------------------------------------------------------------------- +// chart types + +typedef enum rrdset_type { + RRDSET_TYPE_LINE = 0, + RRDSET_TYPE_AREA = 1, + RRDSET_TYPE_STACKED = 2 +} RRDSET_TYPE; + +#define RRDSET_TYPE_LINE_NAME "line" +#define RRDSET_TYPE_AREA_NAME "area" +#define RRDSET_TYPE_STACKED_NAME "stacked" + +RRDSET_TYPE rrdset_type_id(const char *name); +const char *rrdset_type_name(RRDSET_TYPE chart_type); + + +// ---------------------------------------------------------------------------- +// memory mode + +typedef enum rrd_memory_mode { + RRD_MEMORY_MODE_NONE = 0, + RRD_MEMORY_MODE_RAM = 1, + RRD_MEMORY_MODE_MAP = 2, + RRD_MEMORY_MODE_SAVE = 3, + RRD_MEMORY_MODE_ALLOC = 4 +} RRD_MEMORY_MODE; + +#define RRD_MEMORY_MODE_NONE_NAME "none" +#define RRD_MEMORY_MODE_RAM_NAME "ram" +#define RRD_MEMORY_MODE_MAP_NAME "map" +#define RRD_MEMORY_MODE_SAVE_NAME "save" +#define RRD_MEMORY_MODE_ALLOC_NAME "alloc" + +extern RRD_MEMORY_MODE default_rrd_memory_mode; + +extern const char *rrd_memory_mode_name(RRD_MEMORY_MODE id); +extern RRD_MEMORY_MODE rrd_memory_mode_id(const char *name); + + +// ---------------------------------------------------------------------------- +// algorithms types + +typedef enum rrd_algorithm { + RRD_ALGORITHM_ABSOLUTE = 0, + RRD_ALGORITHM_INCREMENTAL = 1, + RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL = 2, + RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL = 3 +} RRD_ALGORITHM; + +#define RRD_ALGORITHM_ABSOLUTE_NAME "absolute" +#define RRD_ALGORITHM_INCREMENTAL_NAME "incremental" +#define RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL_NAME "percentage-of-incremental-row" +#define RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL_NAME "percentage-of-absolute-row" + +extern RRD_ALGORITHM rrd_algorithm_id(const char *name); +extern const char *rrd_algorithm_name(RRD_ALGORITHM algorithm); + +// ---------------------------------------------------------------------------- +// RRD FAMILY + +struct rrdfamily { + avl avl; + + const char *family; + uint32_t hash_family; + + size_t use_count; + + avl_tree_lock rrdvar_root_index; +}; +typedef struct rrdfamily RRDFAMILY; + + +// ---------------------------------------------------------------------------- +// flags +// use this for configuration flags, not for state control +// flags are set/unset in a manner that is not thread safe +// and may lead to missing information. + +typedef enum rrddim_flags { + RRDDIM_FLAG_NONE = 0, + RRDDIM_FLAG_HIDDEN = (1 << 0), // this dimension will not be offered to callers + RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS = (1 << 1) // do not offer RESET or OVERFLOW info to callers +} RRDDIM_FLAGS; + +#ifdef HAVE_C___ATOMIC +#define rrddim_flag_check(rd, flag) (__atomic_load_n(&((rd)->flags), __ATOMIC_SEQ_CST) & (flag)) +#define rrddim_flag_set(rd, flag) __atomic_or_fetch(&((rd)->flags), (flag), __ATOMIC_SEQ_CST) +#define rrddim_flag_clear(rd, flag) __atomic_and_fetch(&((rd)->flags), ~(flag), __ATOMIC_SEQ_CST) +#else +#define rrddim_flag_check(rd, flag) ((rd)->flags & (flag)) +#define rrddim_flag_set(rd, flag) (rd)->flags |= (flag) +#define rrddim_flag_clear(rd, flag) (rd)->flags &= ~(flag) +#endif + + +// ---------------------------------------------------------------------------- +// RRD DIMENSION - this is a metric + +struct rrddim { + // ------------------------------------------------------------------------ + // binary indexing structures + + avl avl; // the binary index - this has to be first member! + + // ------------------------------------------------------------------------ + // the dimension definition + + const char *id; // the id of this dimension (for internal identification) + const char *name; // the name of this dimension (as presented to user) + // this is a pointer to the config structure + // since the config always has a higher priority + // (the user overwrites the name of the charts) + // DO NOT FREE THIS - IT IS ALLOCATED IN CONFIG + + RRD_ALGORITHM algorithm; // the algorithm that is applied to add new collected values + RRD_MEMORY_MODE rrd_memory_mode; // the memory mode for this dimension + + collected_number multiplier; // the multiplier of the collected values + collected_number divisor; // the divider of the collected values + + uint32_t flags; // configuration flags for the dimension + + // ------------------------------------------------------------------------ + // members for temporary data we need for calculations + + uint32_t hash; // a simple hash of the id, to speed up searching / indexing + // instead of strcmp() every item in the binary index + // we first compare the hashes + + uint32_t hash_name; // a simple hash of the name + + char *cache_filename; // the filename we load/save from/to this set + + size_t collections_counter; // the number of times we added values to this rrdim + size_t unused[10]; + + unsigned int updated:1; // 1 when the dimension has been updated since the last processing + unsigned int exposed:1; // 1 when set what have sent this dimension to the central netdata + + struct timeval last_collected_time; // when was this dimension last updated + // this is actual date time we updated the last_collected_value + // THIS IS DIFFERENT FROM THE SAME MEMBER OF RRDSET + + calculated_number calculated_value; // the current calculated value, after applying the algorithm - resets to zero after being used + calculated_number last_calculated_value; // the last calculated value processed + + calculated_number last_stored_value; // the last value as stored in the database (after interpolation) + + collected_number collected_value; // the current value, as collected - resets to 0 after being used + collected_number last_collected_value; // the last value that was collected, after being processed + + // the *_volume members are used to calculate the accuracy of the rounding done by the + // storage number - they are printed to debug.log when debug is enabled for a set. + calculated_number collected_volume; // the sum of all collected values so far + calculated_number stored_volume; // the sum of all stored values so far + + struct rrddim *next; // linking of dimensions within the same data set + struct rrdset *rrdset; + + // ------------------------------------------------------------------------ + // members for checking the data when loading from disk + + long entries; // how many entries this dimension has in ram + // this is the same to the entries of the data set + // we set it here, to check the data when we load it from disk. + + int update_every; // every how many seconds is this updated + + size_t memsize; // the memory allocated for this dimension + + char magic[sizeof(RRDDIMENSION_MAGIC) + 1]; // a string to be saved, used to identify our data file + + struct rrddimvar *variables; + + // ------------------------------------------------------------------------ + // the values stored in this dimension, using our floating point numbers + + storage_number values[]; // the array of values - THIS HAS TO BE THE LAST MEMBER +}; + +// ---------------------------------------------------------------------------- +// these loop macros make sure the linked list is accessed with the right lock + +#define rrddim_foreach_read(rd, st) \ + for((rd) = (st)->dimensions, rrdset_check_rdlock(st); (rd) ; (rd) = (rd)->next) + +#define rrddim_foreach_write(rd, st) \ + for((rd) = (st)->dimensions, rrdset_check_wrlock(st); (rd) ; (rd) = (rd)->next) + + +// ---------------------------------------------------------------------------- +// RRDSET - this is a chart + +// use this for configuration flags, not for state control +// flags are set/unset in a manner that is not thread safe +// and may lead to missing information. + +typedef enum rrdset_flags { + RRDSET_FLAG_ENABLED = 1 << 0, // enables or disables a chart + RRDSET_FLAG_DETAIL = 1 << 1, // if set, the data set should be considered as a detail of another + // (the master data set should be the one that has the same family and is not detail) + RRDSET_FLAG_DEBUG = 1 << 2, // enables or disables debugging for a chart + RRDSET_FLAG_OBSOLETE = 1 << 3, // this is marked by the collector/module as obsolete + RRDSET_FLAG_BACKEND_SEND = 1 << 4, // if set, this chart should be sent to backends + RRDSET_FLAG_BACKEND_IGNORE = 1 << 5, // if set, this chart should not be sent to backends + RRDSET_FLAG_UPSTREAM_SEND = 1 << 6, // if set, this chart should be sent upstream (streaming) + RRDSET_FLAG_UPSTREAM_IGNORE = 1 << 7, // if set, this chart should not be sent upstream (streaming) + RRDSET_FLAG_UPSTREAM_EXPOSED = 1 << 8, // if set, we have sent this chart definition to netdata master (streaming) + RRDSET_FLAG_STORE_FIRST = 1 << 9, // if set, do not eliminate the first collection during interpolation + RRDSET_FLAG_HETEROGENEOUS = 1 << 10, // if set, the chart is not homogeneous (dimensions in it have multiple algorithms, multipliers or dividers) + RRDSET_FLAG_HOMEGENEOUS_CHECK = 1 << 11, // if set, the chart should be checked to determine if the dimensions as homogeneous + RRDSET_FLAG_HIDDEN = 1 << 12, // if set, do not show this chart on the dashboard, but use it for backends + RRDSET_FLAG_SYNC_CLOCK = 1 << 13, // if set, microseconds on next data collection will be ignored (the chart will be synced to now) +} RRDSET_FLAGS; + +#ifdef HAVE_C___ATOMIC +#define rrdset_flag_check(st, flag) (__atomic_load_n(&((st)->flags), __ATOMIC_SEQ_CST) & (flag)) +#define rrdset_flag_set(st, flag) __atomic_or_fetch(&((st)->flags), flag, __ATOMIC_SEQ_CST) +#define rrdset_flag_clear(st, flag) __atomic_and_fetch(&((st)->flags), ~flag, __ATOMIC_SEQ_CST) +#else +#define rrdset_flag_check(st, flag) ((st)->flags & (flag)) +#define rrdset_flag_set(st, flag) (st)->flags |= (flag) +#define rrdset_flag_clear(st, flag) (st)->flags &= ~(flag) +#endif +#define rrdset_flag_check_noatomic(st, flag) ((st)->flags & (flag)) + +struct rrdset { + // ------------------------------------------------------------------------ + // binary indexing structures + + avl avl; // the index, with key the id - this has to be first! + avl avlname; // the index, with key the name + + // ------------------------------------------------------------------------ + // the set configuration + + char id[RRD_ID_LENGTH_MAX + 1]; // id of the data set + + const char *name; // the name of this dimension (as presented to user) + // this is a pointer to the config structure + // since the config always has a higher priority + // (the user overwrites the name of the charts) + + char *config_section; // the config section for the chart + + char *type; // the type of graph RRD_TYPE_* (a category, for determining graphing options) + char *family; // grouping sets under the same family + char *title; // title shown to user + char *units; // units of measurement + + char *context; // the template of this data set + uint32_t hash_context; // the hash of the chart's context + + RRDSET_TYPE chart_type; // line, area, stacked + + int update_every; // every how many seconds is this updated? + + long entries; // total number of entries in the data set + + long current_entry; // the entry that is currently being updated + // it goes around in a round-robin fashion + + RRDSET_FLAGS flags; // configuration flags + + int gap_when_lost_iterations_above; // after how many lost iterations a gap should be stored + // netdata will interpolate values for gaps lower than this + + long priority; // the sorting priority of this chart + + + // ------------------------------------------------------------------------ + // members for temporary data we need for calculations + + RRD_MEMORY_MODE rrd_memory_mode; // if set to 1, this is memory mapped + + char *cache_dir; // the directory to store dimensions + char cache_filename[FILENAME_MAX+1]; // the filename to store this set + + netdata_rwlock_t rrdset_rwlock; // protects dimensions linked list + + size_t counter; // the number of times we added values to this database + size_t counter_done; // the number of times rrdset_done() has been called + + time_t last_accessed_time; // the last time this RRDSET has been accessed + time_t upstream_resync_time; // the timestamp up to which we should resync clock upstream + + char *plugin_name; // the name of the plugin that generated this + char *module_name; // the name of the plugin module that generated this + + size_t unused[6]; + + uint32_t hash; // a simple hash on the id, to speed up searching + // we first compare hashes, and only if the hashes are equal we do string comparisons + + uint32_t hash_name; // a simple hash on the name + + usec_t usec_since_last_update; // the time in microseconds since the last collection of data + + struct timeval last_updated; // when this data set was last updated (updated every time the rrd_stats_done() function) + struct timeval last_collected_time; // when did this data set last collected values + + total_number collected_total; // used internally to calculate percentages + total_number last_collected_total; // used internally to calculate percentages + + RRDFAMILY *rrdfamily; // pointer to RRDFAMILY this chart belongs to + RRDHOST *rrdhost; // pointer to RRDHOST this chart belongs to + + struct rrdset *next; // linking of rrdsets + + // ------------------------------------------------------------------------ + // local variables + + calculated_number green; // green threshold for this chart + calculated_number red; // red threshold for this chart + + avl_tree_lock rrdvar_root_index; // RRDVAR index for this chart + RRDSETVAR *variables; // RRDSETVAR linked list for this chart (one RRDSETVAR, many RRDVARs) + RRDCALC *alarms; // RRDCALC linked list for this chart + + // ------------------------------------------------------------------------ + // members for checking the data when loading from disk + + unsigned long memsize; // how much mem we have allocated for this (without dimensions) + + char magic[sizeof(RRDSET_MAGIC) + 1]; // our magic + + // ------------------------------------------------------------------------ + // the dimensions + + avl_tree_lock dimensions_index; // the root of the dimensions index + RRDDIM *dimensions; // the actual data for every dimension + +}; + +#define rrdset_rdlock(st) netdata_rwlock_rdlock(&((st)->rrdset_rwlock)) +#define rrdset_wrlock(st) netdata_rwlock_wrlock(&((st)->rrdset_rwlock)) +#define rrdset_unlock(st) netdata_rwlock_unlock(&((st)->rrdset_rwlock)) + + +// ---------------------------------------------------------------------------- +// these loop macros make sure the linked list is accessed with the right lock + +#define rrdset_foreach_read(st, host) \ + for((st) = (host)->rrdset_root, rrdhost_check_rdlock(host); st ; (st) = (st)->next) + +#define rrdset_foreach_write(st, host) \ + for((st) = (host)->rrdset_root, rrdhost_check_wrlock(host); st ; (st) = (st)->next) + + +// ---------------------------------------------------------------------------- +// RRDHOST flags +// use this for configuration flags, not for state control +// flags are set/unset in a manner that is not thread safe +// and may lead to missing information. + +typedef enum rrdhost_flags { + RRDHOST_FLAG_ORPHAN = 1 << 0, // this host is orphan (not receiving data) + RRDHOST_FLAG_DELETE_OBSOLETE_CHARTS = 1 << 1, // delete files of obsolete charts + RRDHOST_FLAG_DELETE_ORPHAN_HOST = 1 << 2, // delete the entire host when orphan + RRDHOST_FLAG_BACKEND_SEND = 1 << 3, // send it to backends + RRDHOST_FLAG_BACKEND_DONT_SEND = 1 << 4, // don't send it to backends +} RRDHOST_FLAGS; + +#ifdef HAVE_C___ATOMIC +#define rrdhost_flag_check(host, flag) (__atomic_load_n(&((host)->flags), __ATOMIC_SEQ_CST) & (flag)) +#define rrdhost_flag_set(host, flag) __atomic_or_fetch(&((host)->flags), flag, __ATOMIC_SEQ_CST) +#define rrdhost_flag_clear(host, flag) __atomic_and_fetch(&((host)->flags), ~flag, __ATOMIC_SEQ_CST) +#else +#define rrdhost_flag_check(host, flag) ((host)->flags & (flag)) +#define rrdhost_flag_set(host, flag) (host)->flags |= (flag) +#define rrdhost_flag_clear(host, flag) (host)->flags &= ~(flag) +#endif + +#ifdef NETDATA_INTERNAL_CHECKS +#define rrdset_debug(st, fmt, args...) do { if(unlikely(debug_flags & D_RRD_STATS && rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) \ + debug_int(__FILE__, __FUNCTION__, __LINE__, "%s: " fmt, st->name, ##args); } while(0) +#else +#define rrdset_debug(st, fmt, args...) debug_dummy() +#endif + +// ---------------------------------------------------------------------------- +// Health data + +struct alarm_entry { + uint32_t unique_id; + uint32_t alarm_id; + uint32_t alarm_event_id; + + time_t when; + time_t duration; + time_t non_clear_duration; + + char *name; + uint32_t hash_name; + + char *chart; + uint32_t hash_chart; + + char *family; + + char *exec; + char *recipient; + time_t exec_run_timestamp; + int exec_code; + + char *source; + char *units; + char *info; + + calculated_number old_value; + calculated_number new_value; + + char *old_value_string; + char *new_value_string; + + RRDCALC_STATUS old_status; + RRDCALC_STATUS new_status; + + uint32_t flags; + + int delay; + time_t delay_up_to_timestamp; + + uint32_t updated_by_id; + uint32_t updates_id; + + struct alarm_entry *next; +}; + + +typedef struct alarm_log { + uint32_t next_log_id; + uint32_t next_alarm_id; + unsigned int count; + unsigned int max; + ALARM_ENTRY *alarms; + netdata_rwlock_t alarm_log_rwlock; +} ALARM_LOG; + + +// ---------------------------------------------------------------------------- +// RRD HOST + +struct rrdhost { + avl avl; // the index of hosts + + // ------------------------------------------------------------------------ + // host information + + char *hostname; // the hostname of this host + uint32_t hash_hostname; // the hostname hash + + char *registry_hostname; // the registry hostname for this host + + char machine_guid[GUID_LEN + 1]; // the unique ID of this host + uint32_t hash_machine_guid; // the hash of the unique ID + + const char *os; // the O/S type of the host + const char *tags; // tags for this host + const char *timezone; // the timezone of the host + + RRDHOST_FLAGS flags; // flags about this RRDHOST + + int rrd_update_every; // the update frequency of the host + long rrd_history_entries; // the number of history entries for the host's charts + RRD_MEMORY_MODE rrd_memory_mode; // the memory more for the charts of this host + + char *cache_dir; // the directory to save RRD cache files + char *varlib_dir; // the directory to save health log + + char *program_name; // the program name that collects metrics for this host + char *program_version; // the program version that collects metrics for this host + + // ------------------------------------------------------------------------ + // streaming of data to remote hosts - rrdpush + + unsigned int rrdpush_send_enabled:1; // 1 when this host sends metrics to another netdata + char *rrdpush_send_destination; // where to send metrics to + char *rrdpush_send_api_key; // the api key at the receiving netdata + + // the following are state information for the threading + // streaming metrics from this netdata to an upstream netdata + volatile unsigned int rrdpush_sender_spawn:1; // 1 when the sender thread has been spawn + netdata_thread_t rrdpush_sender_thread; // the sender thread + + volatile unsigned int rrdpush_sender_connected:1; // 1 when the sender is ready to push metrics + int rrdpush_sender_socket; // the fd of the socket to the remote host, or -1 + + volatile unsigned int rrdpush_sender_error_shown:1; // 1 when we have logged a communication error + volatile unsigned int rrdpush_sender_join:1; // 1 when we have to join the sending thread + + SIMPLE_PATTERN *rrdpush_send_charts_matching; // pattern to match the charts to be sent + + // metrics may be collected asynchronously + // these synchronize all the threads willing the write to our sending buffer + netdata_mutex_t rrdpush_sender_buffer_mutex; // exclusive access to rrdpush_sender_buffer + int rrdpush_sender_pipe[2]; // collector to sender thread signaling + BUFFER *rrdpush_sender_buffer; // collector fills it, sender sends it + + + // ------------------------------------------------------------------------ + // streaming of data from remote hosts - rrdpush + + volatile size_t connected_senders; // when remote hosts are streaming to this + // host, this is the counter of connected clients + + time_t senders_disconnected_time; // the time the last sender was disconnected + + // ------------------------------------------------------------------------ + // health monitoring options + + unsigned int health_enabled:1; // 1 when this host has health enabled + time_t health_delay_up_to; // a timestamp to delay alarms processing up to + char *health_default_exec; // the full path of the alarms notifications program + char *health_default_recipient; // the default recipient for all alarms + char *health_log_filename; // the alarms event log filename + size_t health_log_entries_written; // the number of alarm events writtern to the alarms event log + FILE *health_log_fp; // the FILE pointer to the open alarms event log file + + // all RRDCALCs are primarily allocated and linked here + // RRDCALCs may be linked to charts at any point + // (charts may or may not exist when these are loaded) + RRDCALC *alarms; + + ALARM_LOG health_log; // alarms historical events (event log) + uint32_t health_last_processed_id; // the last processed health id from the log + uint32_t health_max_unique_id; // the max alarm log unique id given for the host + uint32_t health_max_alarm_id; // the max alarm id given for the host + + // templates of alarms + // these are used to create alarms when charts + // are created or renamed, that match them + RRDCALCTEMPLATE *templates; + + + // ------------------------------------------------------------------------ + // the charts of the host + + RRDSET *rrdset_root; // the host charts + + + // ------------------------------------------------------------------------ + // locks + + netdata_rwlock_t rrdhost_rwlock; // lock for this RRDHOST (protects rrdset_root linked list) + + // ------------------------------------------------------------------------ + // indexes + + avl_tree_lock rrdset_root_index; // the host's charts index (by id) + avl_tree_lock rrdset_root_index_name; // the host's charts index (by name) + + avl_tree_lock rrdfamily_root_index; // the host's chart families index + avl_tree_lock rrdvar_root_index; // the host's chart variables index + + struct rrdhost *next; +}; +extern RRDHOST *localhost; + +#define rrdhost_rdlock(host) netdata_rwlock_rdlock(&((host)->rrdhost_rwlock)) +#define rrdhost_wrlock(host) netdata_rwlock_wrlock(&((host)->rrdhost_rwlock)) +#define rrdhost_unlock(host) netdata_rwlock_unlock(&((host)->rrdhost_rwlock)) + +// ---------------------------------------------------------------------------- +// these loop macros make sure the linked list is accessed with the right lock + +#define rrdhost_foreach_read(var) \ + for((var) = localhost, rrd_check_rdlock(); var ; (var) = (var)->next) + +#define rrdhost_foreach_write(var) \ + for((var) = localhost, rrd_check_wrlock(); var ; (var) = (var)->next) + + +// ---------------------------------------------------------------------------- +// global lock for all RRDHOSTs + +extern netdata_rwlock_t rrd_rwlock; + +#define rrd_rdlock() netdata_rwlock_rdlock(&rrd_rwlock) +#define rrd_wrlock() netdata_rwlock_wrlock(&rrd_rwlock) +#define rrd_unlock() netdata_rwlock_unlock(&rrd_rwlock) + +// ---------------------------------------------------------------------------- + +extern size_t rrd_hosts_available; +extern time_t rrdhost_free_orphan_time; + +extern void rrd_init(char *hostname); + +extern RRDHOST *rrdhost_find_by_hostname(const char *hostname, uint32_t hash); +extern RRDHOST *rrdhost_find_by_guid(const char *guid, uint32_t hash); + +extern RRDHOST *rrdhost_find_or_create( + const char *hostname + , const char *registry_hostname + , const char *guid + , const char *os + , const char *timezone + , const char *tags + , const char *program_name + , const char *program_version + , int update_every + , long history + , RRD_MEMORY_MODE mode + , unsigned int health_enabled + , unsigned int rrdpush_enabled + , char *rrdpush_destination + , char *rrdpush_api_key + , char *rrdpush_send_charts_matching +); + +#if defined(NETDATA_INTERNAL_CHECKS) && defined(NETDATA_VERIFY_LOCKS) +extern void __rrdhost_check_wrlock(RRDHOST *host, const char *file, const char *function, const unsigned long line); +extern void __rrdhost_check_rdlock(RRDHOST *host, const char *file, const char *function, const unsigned long line); +extern void __rrdset_check_rdlock(RRDSET *st, const char *file, const char *function, const unsigned long line); +extern void __rrdset_check_wrlock(RRDSET *st, const char *file, const char *function, const unsigned long line); +extern void __rrd_check_rdlock(const char *file, const char *function, const unsigned long line); +extern void __rrd_check_wrlock(const char *file, const char *function, const unsigned long line); + +#define rrdhost_check_rdlock(host) __rrdhost_check_rdlock(host, __FILE__, __FUNCTION__, __LINE__) +#define rrdhost_check_wrlock(host) __rrdhost_check_wrlock(host, __FILE__, __FUNCTION__, __LINE__) +#define rrdset_check_rdlock(st) __rrdset_check_rdlock(st, __FILE__, __FUNCTION__, __LINE__) +#define rrdset_check_wrlock(st) __rrdset_check_wrlock(st, __FILE__, __FUNCTION__, __LINE__) +#define rrd_check_rdlock() __rrd_check_rdlock(__FILE__, __FUNCTION__, __LINE__) +#define rrd_check_wrlock() __rrd_check_wrlock(__FILE__, __FUNCTION__, __LINE__) + +#else +#define rrdhost_check_rdlock(host) (void)0 +#define rrdhost_check_wrlock(host) (void)0 +#define rrdset_check_rdlock(st) (void)0 +#define rrdset_check_wrlock(st) (void)0 +#define rrd_check_rdlock() (void)0 +#define rrd_check_wrlock() (void)0 +#endif + +// ---------------------------------------------------------------------------- +// RRDSET functions + +extern int rrdset_set_name(RRDSET *st, const char *name); + +extern RRDSET *rrdset_create_custom(RRDHOST *host + , const char *type + , const char *id + , const char *name + , const char *family + , const char *context + , const char *title + , const char *units + , const char *plugin + , const char *module + , long priority + , int update_every + , RRDSET_TYPE chart_type + , RRD_MEMORY_MODE memory_mode + , long history_entries); + +#define rrdset_create(host, type, id, name, family, context, title, units, plugin, module, priority, update_every, chart_type) \ + rrdset_create_custom(host, type, id, name, family, context, title, units, plugin, module, priority, update_every, chart_type, (host)->rrd_memory_mode, (host)->rrd_history_entries) + +#define rrdset_create_localhost(type, id, name, family, context, title, units, plugin, module, priority, update_every, chart_type) \ + rrdset_create(localhost, type, id, name, family, context, title, units, plugin, module, priority, update_every, chart_type) + +extern void rrdhost_free_all(void); +extern void rrdhost_save_all(void); +extern void rrdhost_cleanup_all(void); + +extern void rrdhost_cleanup_orphan_hosts_nolock(RRDHOST *protected); +extern void rrdhost_free(RRDHOST *host); +extern void rrdhost_save_charts(RRDHOST *host); +extern void rrdhost_delete_charts(RRDHOST *host); + +extern int rrdhost_should_be_removed(RRDHOST *host, RRDHOST *protected, time_t now); + +extern void rrdset_update_heterogeneous_flag(RRDSET *st); + +extern RRDSET *rrdset_find(RRDHOST *host, const char *id); +#define rrdset_find_localhost(id) rrdset_find(localhost, id) + +extern RRDSET *rrdset_find_bytype(RRDHOST *host, const char *type, const char *id); +#define rrdset_find_bytype_localhost(type, id) rrdset_find_bytype(localhost, type, id) + +extern RRDSET *rrdset_find_byname(RRDHOST *host, const char *name); +#define rrdset_find_byname_localhost(name) rrdset_find_byname(localhost, name) + +extern void rrdset_next_usec_unfiltered(RRDSET *st, usec_t microseconds); +extern void rrdset_next_usec(RRDSET *st, usec_t microseconds); +#define rrdset_next(st) rrdset_next_usec(st, 0ULL) + +extern void rrdset_done(RRDSET *st); + +extern void rrdset_is_obsolete(RRDSET *st); +extern void rrdset_isnot_obsolete(RRDSET *st); + +// checks if the RRDSET should be offered to viewers +#define rrdset_is_available_for_viewers(st) (rrdset_flag_check(st, RRDSET_FLAG_ENABLED) && !rrdset_flag_check(st, RRDSET_FLAG_HIDDEN) && !rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE) && (st)->dimensions && (st)->rrd_memory_mode != RRD_MEMORY_MODE_NONE) +#define rrdset_is_available_for_backends(st) (rrdset_flag_check(st, RRDSET_FLAG_ENABLED) && !rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE) && (st)->dimensions) + +// get the total duration in seconds of the round robin database +#define rrdset_duration(st) ((time_t)( (((st)->counter >= ((unsigned long)(st)->entries))?(unsigned long)(st)->entries:(st)->counter) * (st)->update_every )) + +// get the timestamp of the last entry in the round robin database +#define rrdset_last_entry_t(st) ((time_t)(((st)->last_updated.tv_sec))) + +// get the timestamp of first entry in the round robin database +#define rrdset_first_entry_t(st) ((time_t)(rrdset_last_entry_t(st) - rrdset_duration(st))) + +// get the last slot updated in the round robin database +#define rrdset_last_slot(st) ((size_t)(((st)->current_entry == 0) ? (st)->entries - 1 : (st)->current_entry - 1)) + +// get the first / oldest slot updated in the round robin database +// #define rrdset_first_slot(st) ((size_t)( (((st)->counter >= ((unsigned long)(st)->entries)) ? (unsigned long)( ((unsigned long)(st)->current_entry > 0) ? ((unsigned long)(st)->current_entry) : ((unsigned long)(st)->entries) ) - 1 : 0) )) + +// return the slot that has the oldest value + +static inline size_t rrdset_first_slot(RRDSET *st) { + if(st->counter >= (size_t)st->entries) { + // the database has been rotated at least once + // the oldest entry is the one that will be next + // overwritten by data collection + return (size_t)st->current_entry; + } + + // we do not have rotated the db yet + // so 0 is the first entry + return 0; +} + +// get the slot of the round robin database, for the given timestamp (t) +// it always returns a valid slot, although may not be for the time requested if the time is outside the round robin database +static inline size_t rrdset_time2slot(RRDSET *st, time_t t) { + size_t ret = 0; + + if(t >= rrdset_last_entry_t(st)) { + // the requested time is after the last entry we have + ret = rrdset_last_slot(st); + } + else { + if(t <= rrdset_first_entry_t(st)) { + // the requested time is before the first entry we have + ret = rrdset_first_slot(st); + } + else { + if(rrdset_last_slot(st) >= ((rrdset_last_entry_t(st) - t) / (size_t)(st->update_every))) + ret = rrdset_last_slot(st) - ((rrdset_last_entry_t(st) - t) / (size_t)(st->update_every)); + else + ret = rrdset_last_slot(st) - ((rrdset_last_entry_t(st) - t) / (size_t)(st->update_every)) + (unsigned long)st->entries; + } + } + + if(unlikely(ret >= (size_t)st->entries)) { + error("INTERNAL ERROR: rrdset_time2slot() on %s returns values outside entries", st->name); + ret = (size_t)(st->entries - 1); + } + + return ret; +} + +// get the timestamp of a specific slot in the round robin database +static inline time_t rrdset_slot2time(RRDSET *st, size_t slot) { + time_t ret; + + if(slot >= (size_t)st->entries) { + error("INTERNAL ERROR: caller of rrdset_slot2time() gives invalid slot %zu", slot); + slot = (size_t)st->entries - 1; + } + + if(slot > rrdset_last_slot(st)) { + ret = rrdset_last_entry_t(st) - (size_t)st->update_every * (rrdset_last_slot(st) - slot + (size_t)st->entries); + } + else { + ret = rrdset_last_entry_t(st) - (size_t)st->update_every; + } + + if(unlikely(ret < rrdset_first_entry_t(st))) { + error("INTERNAL ERROR: rrdset_slot2time() on %s returns time too far in the past", st->name); + ret = rrdset_first_entry_t(st); + } + + if(unlikely(ret > rrdset_last_entry_t(st))) { + error("INTERNAL ERROR: rrdset_slot2time() on %s returns time into the future", st->name); + ret = rrdset_last_entry_t(st); + } + + return ret; +} + +// ---------------------------------------------------------------------------- +// RRD DIMENSION functions + +extern RRDDIM *rrddim_add_custom(RRDSET *st, const char *id, const char *name, collected_number multiplier, collected_number divisor, RRD_ALGORITHM algorithm, RRD_MEMORY_MODE memory_mode); +#define rrddim_add(st, id, name, multiplier, divisor, algorithm) rrddim_add_custom(st, id, name, multiplier, divisor, algorithm, (st)->rrd_memory_mode) + +extern int rrddim_set_name(RRDSET *st, RRDDIM *rd, const char *name); +extern int rrddim_set_algorithm(RRDSET *st, RRDDIM *rd, RRD_ALGORITHM algorithm); +extern int rrddim_set_multiplier(RRDSET *st, RRDDIM *rd, collected_number multiplier); +extern int rrddim_set_divisor(RRDSET *st, RRDDIM *rd, collected_number divisor); + +extern RRDDIM *rrddim_find(RRDSET *st, const char *id); + +extern int rrddim_hide(RRDSET *st, const char *id); +extern int rrddim_unhide(RRDSET *st, const char *id); + +extern collected_number rrddim_set_by_pointer(RRDSET *st, RRDDIM *rd, collected_number value); +extern collected_number rrddim_set(RRDSET *st, const char *id, collected_number value); + +extern long align_entries_to_pagesize(RRD_MEMORY_MODE mode, long entries); + +// ---------------------------------------------------------------------------- +// RRD internal functions + +#ifdef NETDATA_RRD_INTERNALS + +extern avl_tree_lock rrdhost_root_index; + +extern char *rrdset_strncpyz_name(char *to, const char *from, size_t length); +extern char *rrdset_cache_dir(RRDHOST *host, const char *id, const char *config_section); + +extern void rrddim_free(RRDSET *st, RRDDIM *rd); + +extern int rrddim_compare(void* a, void* b); +extern int rrdset_compare(void* a, void* b); +extern int rrdset_compare_name(void* a, void* b); +extern int rrdfamily_compare(void *a, void *b); + +extern RRDFAMILY *rrdfamily_create(RRDHOST *host, const char *id); +extern void rrdfamily_free(RRDHOST *host, RRDFAMILY *rc); + +#define rrdset_index_add(host, st) (RRDSET *)avl_insert_lock(&((host)->rrdset_root_index), (avl *)(st)) +#define rrdset_index_del(host, st) (RRDSET *)avl_remove_lock(&((host)->rrdset_root_index), (avl *)(st)) +extern RRDSET *rrdset_index_del_name(RRDHOST *host, RRDSET *st); + +extern void rrdset_free(RRDSET *st); +extern void rrdset_reset(RRDSET *st); +extern void rrdset_save(RRDSET *st); +extern void rrdset_delete(RRDSET *st); + +extern void rrdhost_cleanup_obsolete_charts(RRDHOST *host); + +#endif /* NETDATA_RRD_INTERNALS */ + + +#endif /* NETDATA_RRD_H */ |