summaryrefslogtreecommitdiffstats
path: root/database/rrd.h
blob: 3e0daa1691cb8c213a9ef93813d1951db0e9914f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
// 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;
typedef struct context_param CONTEXT_PARAM;

typedef void *ml_host_t;
typedef void *ml_dimension_t;

// forward declarations
struct rrddim_volatile;
struct rrdset_volatile;
struct context_param;
struct label;
#ifdef ENABLE_DBENGINE
struct rrdeng_page_descr;
struct rrdengine_instance;
struct pg_cache_page_index;
#endif

#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"
#include "streaming/rrdpush.h"
#include "aclk/aclk_rrdhost_state.h"
#include "sqlite/sqlite_health.h"

enum {
    CONTEXT_FLAGS_ARCHIVE = 0x01,
    CONTEXT_FLAGS_CHART   = 0x02,
    CONTEXT_FLAGS_CONTEXT = 0x04
};

struct context_param {
    RRDDIM *rd;
    time_t first_entry_t;
    time_t last_entry_t;
    uint8_t flags;
};

#define RRDSET_MINIMUM_LIVE_COUNT 3
#define META_CHART_UPDATED 1
#define META_PLUGIN_UPDATED 2
#define META_MODULE_UPDATED 4
#define META_CHART_ACTIVATED 8

#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;
extern time_t rrdset_free_obsolete_time;

#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_DBENGINE = 5
} 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"
#define RRD_MEMORY_MODE_DBENGINE_NAME "dbengine"

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_t 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_FLAG_OBSOLETE                        = (1 << 2),  // this is marked by the collector/module as obsolete
    // No new values have been collected for this dimension since agent start or it was marked RRDDIM_FLAG_OBSOLETE at
    // least rrdset_free_obsolete_time seconds ago.
    RRDDIM_FLAG_ARCHIVED                        = (1 << 3),
    RRDDIM_FLAG_ACLK                            = (1 << 4)
} 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

typedef enum label_source {
    LABEL_SOURCE_AUTO             = 0,
    LABEL_SOURCE_NETDATA_CONF     = 1,
    LABEL_SOURCE_DOCKER           = 2,
    LABEL_SOURCE_ENVIRONMENT      = 3,
    LABEL_SOURCE_KUBERNETES       = 4
} LABEL_SOURCE;

#define LABEL_FLAG_UPDATE_STREAM 1
#define LABEL_FLAG_STOP_STREAM 2

struct label {
    char *key, *value;
    uint32_t key_hash;
    LABEL_SOURCE label_source;
    struct label *next;
};

struct label_index {
    struct label *head;                     // Label list
    netdata_rwlock_t labels_rwlock;         // lock for the label list
    uint32_t labels_flag;                   // Flags for labels
};

typedef enum strip_quotes {
    DO_NOT_STRIP_QUOTES,
    STRIP_QUOTES
} STRIP_QUOTES_OPTION;

typedef enum skip_escaped_characters {
    DO_NOT_SKIP_ESCAPED_CHARACTERS,
    SKIP_ESCAPED_CHARACTERS
} SKIP_ESCAPED_CHARACTERS_OPTION;

char *translate_label_source(LABEL_SOURCE l);
struct label *create_label(char *key, char *value, LABEL_SOURCE label_source);
extern struct label *add_label_to_list(struct label *l, char *key, char *value, LABEL_SOURCE label_source);
extern void update_label_list(struct label **labels, struct label *new_labels);
extern void replace_label_list(struct label_index *labels, struct label *new_labels);
extern int is_valid_label_value(char *value);
extern int is_valid_label_key(char *key);
extern void free_label_list(struct label *labels);
extern struct label *label_list_lookup_key(struct label *head, char *key, uint32_t key_hash);
extern struct label *label_list_lookup_keylist(struct label *head, char *keylist);
extern int label_list_contains_keylist(struct label *head, char *keylist);
extern int label_list_contains_key(struct label *head, char *key, uint32_t key_hash);
extern int label_list_contains(struct label *head, struct label *check);
extern struct label *merge_label_lists(struct label *lo_pri, struct label *hi_pri);
extern void strip_last_symbol(
    char *str,
    char symbol,
    SKIP_ESCAPED_CHARACTERS_OPTION skip_escaped_characters);
extern char *strip_double_quotes(char *str, SKIP_ESCAPED_CHARACTERS_OPTION skip_escaped_characters);
void reload_host_labels(void);
extern void rrdset_add_label_to_new_list(RRDSET *st, char *key, char *value, LABEL_SOURCE source);
extern void rrdset_finalize_labels(RRDSET *st);
extern void rrdset_update_labels(RRDSET *st, struct label *labels);
extern int rrdset_contains_label_keylist(RRDSET *st, char *key);
extern struct label *rrdset_lookup_label_key(RRDSET *st, char *key, uint32_t key_hash);

// ----------------------------------------------------------------------------
// RRD DIMENSION - this is a metric

struct rrddim {
    // ------------------------------------------------------------------------
    // binary indexing structures

    avl_t 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
    struct rrddim_volatile *state;                  // volatile state that is not persistently stored
    size_t unused[8];

    collected_number collected_value_max;           // the absolute maximum of the collected value

    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
};

// ----------------------------------------------------------------------------
// iterator state for RRD dimension data collection
union rrddim_collect_handle {
    struct {
        long slot;
        long entries;
    } slotted;                           // state the legacy code uses
#ifdef ENABLE_DBENGINE
    struct rrdeng_collect_handle {
        struct rrdeng_page_descr *descr, *prev_descr;
        unsigned long page_correlation_id;
        struct rrdengine_instance *ctx;
        // set to 1 when this dimension is not page aligned with the other dimensions in the chart
        uint8_t unaligned_page;
    } rrdeng; // state the database engine uses
#endif
};

// ----------------------------------------------------------------------------
// iterator state for RRD dimension data queries

#ifdef ENABLE_DBENGINE
struct rrdeng_query_handle {
    struct rrdeng_page_descr *descr;
    struct rrdengine_instance *ctx;
    struct pg_cache_page_index *page_index;
    time_t next_page_time;
    time_t now;
    unsigned position;
};
#endif

struct rrddim_query_handle {
    RRDDIM *rd;
    time_t start_time;
    time_t end_time;
    union {
        struct {
            long slot;
            long last_slot;
            uint8_t finished;
        } slotted;                         // state the legacy code uses
#ifdef ENABLE_DBENGINE
        struct rrdeng_query_handle rrdeng; // state the database engine uses
#endif
    };
};


// ----------------------------------------------------------------------------
// volatile state per RRD dimension
struct rrddim_volatile {
#ifdef ENABLE_DBENGINE
    uuid_t *rrdeng_uuid;                 // database engine metric UUID
    struct pg_cache_page_index *page_index;
#endif
#ifdef ENABLE_ACLK
    int aclk_live_status;
#endif
    uuid_t metric_uuid;                 // global UUID for this metric (unique_across hosts)
    union rrddim_collect_handle handle;
    // ------------------------------------------------------------------------
    // function pointers that handle data collection
    struct rrddim_collect_ops {
        // an initialization function to run before starting collection
        void (*init)(RRDDIM *rd);

        // run this to store each metric into the database
        void (*store_metric)(RRDDIM *rd, usec_t point_in_time, storage_number number);

        // an finalization function to run after collection is over
        // returns 1 if it's safe to delete the dimension
        int (*finalize)(RRDDIM *rd);
    } collect_ops;

    // function pointers that handle database queries
    struct rrddim_query_ops {
        // run this before starting a series of next_metric() database queries
        void (*init)(RRDDIM *rd, struct rrddim_query_handle *handle, time_t start_time, time_t end_time);

        // run this to load each metric number from the database
        storage_number (*next_metric)(struct rrddim_query_handle *handle, time_t *current_time);

        // run this to test if the series of next_metric() database queries is finished
        int (*is_finished)(struct rrddim_query_handle *handle);

        // run this after finishing a series of load_metric() database queries
        void (*finalize)(struct rrddim_query_handle *handle);

        // get the timestamp of the last entry of this metric
        time_t (*latest_time)(RRDDIM *rd);

        // get the timestamp of the first entry of this metric
        time_t (*oldest_time)(RRDDIM *rd);
    } query_ops;

    ml_dimension_t ml_dimension;
};

// ----------------------------------------------------------------------------
// volatile state per chart
struct rrdset_volatile {
    char *old_title;
    char *old_context;
    uuid_t hash_id;
    struct label *new_labels;
    struct label_index labels;
};

// ----------------------------------------------------------------------------
// 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_EXPORTING_SEND      = 1 << 4, // if set, this chart should be sent to Prometheus web API
    RRDSET_FLAG_EXPORTING_IGNORE    = 1 << 5, // if set, this chart should not be sent to Prometheus web API
    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 parent (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_HOMOGENEOUS_CHECK   = 1 << 11, // if set, the chart should be checked to determine if the dimensions are 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_FLAG_OBSOLETE_DIMENSIONS = 1 << 14, // this is marked by the collector/module when a chart has obsolete dimensions
    // No new values have been collected for this chart since agent start or it was marked RRDSET_FLAG_OBSOLETE at
    // least rrdset_free_obsolete_time seconds ago.
    RRDSET_FLAG_ARCHIVED            = 1 << 15,
    RRDSET_FLAG_ACLK                = 1 << 16,
    RRDSET_FLAG_BACKEND_SEND        = 1 << 17, // if set, this chart should be sent to backends
    RRDSET_FLAG_BACKEND_IGNORE      = 1 << 18 // if set, this chart should not be sent to backends
} 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_t avl;                                      // the index, with key the id - this has to be first!
    avl_t 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
    RRDSET_FLAGS *exporting_flags;                  // array of flags for exporting connector instances

    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

    union {
        time_t last_accessed_time;                  // the last time this RRDSET has been accessed
        time_t last_entry_t;                        // the last_entry_t computed for transient RRDSET
    };
    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
    uuid_t *chart_uuid;                             // Store the global GUID for this chart
                                                    // this object.
    struct rrdset_volatile *state;                  // volatile state that is not persistently stored
    size_t unused[3];

    size_t rrddim_page_alignment;                   // keeps metric pages in alignment when using dbengine

    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_FLAG_ARCHIVED               = 1 << 5, // The host is archived, no collected charts yet
    RRDHOST_FLAG_MULTIHOST              = 1 << 6, // Host belongs to localhost/megadb
} 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;
    uuid_t config_hash_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 *classification;
    char *component;
    char *type;

    char *exec;
    char *recipient;
    time_t exec_run_timestamp;
    int exec_code;
    uint64_t exec_spawn_serial;

    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;

    time_t last_repeat;

    struct alarm_entry *next;
    struct alarm_entry *next_in_progress;
    struct alarm_entry *prev_in_progress;
};


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_system_info {
    char *host_os_name;
    char *host_os_id;
    char *host_os_id_like;
    char *host_os_version;
    char *host_os_version_id;
    char *host_os_detection;
    char *host_cores;
    char *host_cpu_freq;
    char *host_ram_total;
    char *host_disk_space;
    char *container_os_name;
    char *container_os_id;
    char *container_os_id_like;
    char *container_os_version;
    char *container_os_version_id;
    char *container_os_detection;
    char *kernel_name;
    char *kernel_version;
    char *architecture;
    char *virtualization;
    char *virt_detection;
    char *container;
    char *container_detection;
    char *is_k8s_node;
    uint16_t hops;
    bool ml_capable;
    bool ml_enabled;
};

struct rrdhost {
    avl_t 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

#ifdef ENABLE_ACLK
    long    deleted_charts_count;
#endif

    const char *abbrev_timezone;                    // the abbriviated timezone of the host
    int32_t utc_offset;                             // the offset in seconds from utc

    RRDHOST_FLAGS flags;                            // flags about this RRDHOST
    RRDHOST_FLAGS *exporting_flags;                 // array of flags for exporting connector instances

    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

    struct rrdhost_system_info *system_info;        // information collected from the host environment

    // ------------------------------------------------------------------------
    // streaming of data to remote hosts - rrdpush

    unsigned int rrdpush_send_enabled;            // 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
    struct sender_state *sender;
    volatile unsigned int rrdpush_sender_spawn;   // 1 when the sender thread has been spawn
    netdata_thread_t rrdpush_sender_thread;         // the sender thread
    void *dbsync_worker;

    volatile unsigned int rrdpush_sender_connected; // 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 when we have logged a communication error
    volatile unsigned int rrdpush_sender_join;    // 1 when we have to join the sending thread

    SIMPLE_PATTERN *rrdpush_send_charts_matching;   // pattern to match the charts to be sent

    int rrdpush_sender_pipe[2];                     // collector to sender thread signaling
    //BUFFER *rrdpush_sender_buffer;                  // collector fills it, sender sends it

    //uint32_t stream_version;                             //Set the current version of the stream.

    // ------------------------------------------------------------------------
    // 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

    struct receiver_state *receiver;
    netdata_mutex_t receiver_lock;

    // ------------------------------------------------------------------------
    // health monitoring options

    unsigned int health_enabled;                  // 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 written to the alarms event log
    FILE *health_log_fp;                            // the FILE pointer to the open alarms event log file
    uint32_t health_default_warn_repeat_every;      // the default value for the interval between repeating warning notifications
    uint32_t health_default_crit_repeat_every;      // the default value for the interval between repeating critical notifications


    // 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;
    RRDCALC *alarms_with_foreach;
    avl_tree_lock alarms_idx_health_log;
    avl_tree_lock alarms_idx_name;

    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;
    RRDCALCTEMPLATE *alarms_template_with_foreach;


    // ------------------------------------------------------------------------
    // the charts of the host

    RRDSET *rrdset_root;                            // the host charts

    unsigned int obsolete_charts_count;


    // ------------------------------------------------------------------------
    // locks

    netdata_rwlock_t rrdhost_rwlock;                // lock for this RRDHOST (protects rrdset_root linked list)

    // ------------------------------------------------------------------------
    // ML handle
    ml_host_t ml_host;

    // ------------------------------------------------------------------------
    // Support for host-level labels
    struct label_index labels;

    // ------------------------------------------------------------------------
    // 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

#ifdef ENABLE_DBENGINE
    struct rrdengine_instance *rrdeng_ctx;          // DB engine instance for this host
#endif
    uuid_t  host_uuid;                              // Global GUID for this host
    uuid_t  *node_id;                               // Cloud node_id

#ifdef ENABLE_HTTPS
    struct netdata_ssl ssl;                         //Structure used to encrypt the connection
    struct netdata_ssl stream_ssl;                         //Structure used to encrypt the stream
#endif

    netdata_mutex_t aclk_state_lock;
    aclk_rrdhost_state aclk_state;

    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))

#define rrdhost_aclk_state_lock(host) netdata_mutex_lock(&((host)->aclk_state_lock))
#define rrdhost_aclk_state_unlock(host) netdata_mutex_unlock(&((host)->aclk_state_lock))

// ----------------------------------------------------------------------------
// 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 int rrd_init(char *hostname, struct rrdhost_system_info *system_info);

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 *abbrev_timezone
        , int32_t utc_offset
        , 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
        , struct rrdhost_system_info *system_info
);

extern void rrdhost_update(RRDHOST *host
    , const char *hostname
    , const char *registry_hostname
    , const char *guid
    , const char *os
    , const char *timezone
    , const char *abbrev_timezone
    , int32_t utc_offset
    , 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
    , struct rrdhost_system_info *system_info
);

extern int rrdhost_set_system_info_variable(struct rrdhost_system_info *system_info, char *name, char *value);

#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_host);
extern void rrdhost_system_info_free(struct rrdhost_system_info *system_info);
extern void rrdhost_free(RRDHOST *host);
extern void rrdhost_save_charts(RRDHOST *host);
extern void rrdhost_delete_charts(RRDHOST *host);
extern void rrd_cleanup_obsolete_charts();

extern int rrdhost_should_be_removed(RRDHOST *host, RRDHOST *protected_host, 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)
/* This will not return charts that are archived */
static inline RRDSET *rrdset_find_active_localhost(const char *id)
{
    RRDSET *st = rrdset_find_localhost(id);
    if (unlikely(st && rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED)))
        return NULL;
    return st;
}

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)
/* This will not return charts that are archived */
static inline RRDSET *rrdset_find_active_bytype_localhost(const char *type, const char *id)
{
    RRDSET *st = rrdset_find_bytype_localhost(type, id);
    if (unlikely(st && rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED)))
        return NULL;
    return st;
}

extern RRDSET *rrdset_find_byname(RRDHOST *host, const char *name);
#define rrdset_find_byname_localhost(name)  rrdset_find_byname(localhost, name)
/* This will not return charts that are archived */
static inline RRDSET *rrdset_find_active_byname_localhost(const char *name)
{
    RRDSET *st = rrdset_find_byname_localhost(name);
    if (unlikely(st && rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED)))
        return NULL;
    return st;
}

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) && !rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED) && (st)->dimensions && (st)->rrd_memory_mode != RRD_MEMORY_MODE_NONE)
#define rrdset_is_available_for_exporting_and_alarms(st) (rrdset_flag_check(st, RRDSET_FLAG_ENABLED) && !rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE) && !rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED) && (st)->dimensions)
#define rrdset_is_archived(st) (rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED) && (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
static inline time_t rrdset_last_entry_t_nolock(RRDSET *st)
{
    if (st->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE) {
        RRDDIM *rd;
        time_t last_entry_t  = 0;

        rrddim_foreach_read(rd, st) {
            last_entry_t = MAX(last_entry_t, rd->state->query_ops.latest_time(rd));
        }

        return last_entry_t;
    } else {
        return (time_t)st->last_updated.tv_sec;
    }
}

static inline time_t rrdset_last_entry_t(RRDSET *st)
{
    time_t last_entry_t;

    netdata_rwlock_rdlock(&st->rrdset_rwlock);
    last_entry_t = rrdset_last_entry_t_nolock(st);
    netdata_rwlock_unlock(&st->rrdset_rwlock);

    return last_entry_t;
}

// get the timestamp of first entry in the round robin database
static inline time_t rrdset_first_entry_t_nolock(RRDSET *st)
{
    if (st->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE) {
        RRDDIM *rd;
        time_t first_entry_t = LONG_MAX;

        rrddim_foreach_read(rd, st) {
            first_entry_t =
                MIN(first_entry_t,
                    rd->state->query_ops.oldest_time(rd) > st->update_every ?
                        rd->state->query_ops.oldest_time(rd) - st->update_every : 0);
        }

        if (unlikely(LONG_MAX == first_entry_t)) return 0;
        return first_entry_t;
    } else {
        return (time_t)(rrdset_last_entry_t_nolock(st) - rrdset_duration(st));
    }
}

static inline time_t rrdset_first_entry_t(RRDSET *st)
{
    time_t first_entry_t;

    netdata_rwlock_rdlock(&st->rrdset_rwlock);
    first_entry_t = rrdset_first_entry_t_nolock(st);
    netdata_rwlock_unlock(&st->rrdset_rwlock);

    return first_entry_t;
}

// get the timestamp of the last entry in the round robin database
static inline time_t rrddim_last_entry_t(RRDDIM *rd) {
    if (rd->rrdset->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE)
        return rd->state->query_ops.latest_time(rd);
    return (time_t)rd->rrdset->last_updated.tv_sec;
}

static inline time_t rrddim_first_entry_t(RRDDIM *rd) {
    if (rd->rrdset->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE)
        return rd->state->query_ops.oldest_time(rd);
    return (time_t)(rd->rrdset->last_updated.tv_sec - rrdset_duration(rd->rrdset));
}

time_t rrdhost_last_entry_t(RRDHOST *h);

// 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
// only valid when not using dbengine
static inline size_t rrdset_time2slot(RRDSET *st, time_t t) {
    size_t ret = 0;
    time_t last_entry_t = rrdset_last_entry_t_nolock(st);
    time_t first_entry_t = rrdset_first_entry_t_nolock(st);

    if(t >= last_entry_t) {
        // the requested time is after the last entry we have
        ret = rrdset_last_slot(st);
    }
    else {
        if(t <= first_entry_t) {
            // the requested time is before the first entry we have
            ret = rrdset_first_slot(st);
        }
        else {
            if(rrdset_last_slot(st) >= ((last_entry_t - t) / (size_t)(st->update_every)))
                ret = rrdset_last_slot(st) - ((last_entry_t - t) / (size_t)(st->update_every));
            else
                ret = rrdset_last_slot(st) - ((last_entry_t - 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
// only valid when not using dbengine
static inline time_t rrdset_slot2time(RRDSET *st, size_t slot) {
    time_t ret;
    time_t last_entry_t = rrdset_last_entry_t_nolock(st);
    time_t first_entry_t = rrdset_first_entry_t_nolock(st);

    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 = last_entry_t - (size_t)st->update_every * (rrdset_last_slot(st) - slot + (size_t)st->entries);
    }
    else {
        ret = last_entry_t - (size_t)st->update_every;
    }

    if(unlikely(ret < first_entry_t)) {
        error("INTERNAL ERROR: rrdset_slot2time() on %s returns time too far in the past", st->name);
        ret = first_entry_t;
    }

    if(unlikely(ret > last_entry_t)) {
        error("INTERNAL ERROR: rrdset_slot2time() on %s returns time into the future", st->name);
        ret = last_entry_t;
    }

    return ret;
}

// ----------------------------------------------------------------------------
// RRD DIMENSION functions

extern void rrdcalc_link_to_rrddim(RRDDIM *rd, RRDSET *st, RRDHOST *host);
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);//,
                                 //int is_archived, uuid_t *dim_uuid);
#define rrddim_add(st, id, name, multiplier, divisor, algorithm) rrddim_add_custom(st, id, name, multiplier, divisor, \
                                                                                   algorithm, (st)->rrd_memory_mode)//, 0, NULL)

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);
/* This will not return dimensions that are archived */
static inline RRDDIM *rrddim_find_active(RRDSET *st, const char *id)
{
    RRDDIM *rd = rrddim_find(st, id);
    if (unlikely(rd && rrddim_flag_check(rd, RRDDIM_FLAG_ARCHIVED)))
        return NULL;
    return rd;
}


extern int rrddim_hide(RRDSET *st, const char *id);
extern int rrddim_unhide(RRDSET *st, const char *id);

extern void rrddim_is_obsolete(RRDSET *st, RRDDIM *rd);
extern void rrddim_isnot_obsolete(RRDSET *st, RRDDIM *rd);

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);

// ----------------------------------------------------------------------------
// Miscellaneous functions

extern int alarm_compare_id(void *a, void *b);
extern int alarm_compare_name(void *a, void *b);

// ----------------------------------------------------------------------------
// 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);

#define rrddim_free(st, rd) rrddim_free_custom(st, rd, 0)
extern void rrddim_free_custom(RRDSET *st, RRDDIM *rd, int db_rotated);

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_t *)(st))
#define rrdset_index_del(host, st) (RRDSET *)avl_remove_lock(&((host)->rrdset_root_index), (avl_t *)(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);
#define rrdset_delete(st) rrdset_delete_custom(st, 0)
extern void rrdset_delete_custom(RRDSET *st, int db_rotated);
extern void rrdset_delete_obsolete_dimensions(RRDSET *st);

extern RRDHOST *rrdhost_create(
    const char *hostname, const char *registry_hostname, const char *guid, const char *os, const char *timezone,
    const char *abbrev_timezone, int32_t utc_offset,const char *tags, const char *program_name, const char *program_version,
    int update_every, long entries, RRD_MEMORY_MODE memory_mode, unsigned int health_enabled, unsigned int rrdpush_enabled,
    char *rrdpush_destination, char *rrdpush_api_key, char *rrdpush_send_charts_matching, struct rrdhost_system_info *system_info,
    int is_localhost); //TODO: Remove , int is_archived);

#endif /* NETDATA_RRD_INTERNALS */

extern void set_host_properties(
    RRDHOST *host, int update_every, RRD_MEMORY_MODE memory_mode, const char *hostname, const char *registry_hostname,
    const char *guid, const char *os, const char *tags, const char *tzone, const char *abbrev_tzone, int32_t utc_offset,
    const char *program_name, const char *program_version);

// ----------------------------------------------------------------------------
// RRD DB engine declarations

#ifdef ENABLE_DBENGINE
#include "database/engine/rrdengineapi.h"
#endif
#include "sqlite/sqlite_functions.h"
#include "sqlite/sqlite_aclk.h"
#include "sqlite/sqlite_aclk_chart.h"
#include "sqlite/sqlite_aclk_alert.h"
#include "sqlite/sqlite_aclk_node.h"
#include "sqlite/sqlite_health.h"
#endif /* NETDATA_RRD_H */