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
|
/*
** Zabbix
** Copyright (C) 2001-2021 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#include "stats.h"
#include "perfstat.h"
#include "alias.h"
#include "log.h"
#include "mutexs.h"
#include "sysinfo.h"
#define OBJECT_CACHE_REFRESH_INTERVAL 60
#define NAMES_UPDATE_INTERVAL 60
struct object_name_ref
{
char *eng_name;
wchar_t *loc_name;
};
typedef struct
{
zbx_perf_counter_data_t *pPerfCounterList;
PDH_HQUERY pdh_query;
time_t lastrefresh_objects; /* last refresh time of object cache */
time_t lastupdate_names; /* last update time of object names */
}
ZBX_PERF_STAT_DATA;
static ZBX_PERF_STAT_DATA ppsd;
static zbx_mutex_t perfstat_access = ZBX_MUTEX_NULL;
static struct object_name_ref *object_names = NULL;
static int object_num = 0;
#define LOCK_PERFCOUNTERS zbx_mutex_lock(perfstat_access)
#define UNLOCK_PERFCOUNTERS zbx_mutex_unlock(perfstat_access)
static int perf_collector_started(void)
{
return (NULL != ppsd.pdh_query ? SUCCEED : FAIL);
}
/******************************************************************************
* *
* Comments: counter failed or disappeared, dismiss all previous values *
* *
******************************************************************************/
static void deactivate_perf_counter(zbx_perf_counter_data_t *counter)
{
zabbix_log(LOG_LEVEL_DEBUG, "deactivate_perf_counter() counterpath:'%s'", counter->counterpath);
counter->status = PERF_COUNTER_NOTSUPPORTED;
counter->value_count = 0;
counter->value_current = -1;
counter->olderRawValue = 0;
counter->sum = 0;
}
/******************************************************************************
* *
* Comments: if the specified counter exists or a new is successfully *
* added, a pointer to that counter is returned, NULL otherwise *
* *
******************************************************************************/
zbx_perf_counter_data_t *add_perf_counter(const char *name, const char *counterpath, int interval,
zbx_perf_counter_lang_t lang, char **error)
{
zbx_perf_counter_data_t *cptr = NULL;
PDH_STATUS pdh_status;
int added = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() counter:'%s' interval:%d", __func__, counterpath, interval);
LOCK_PERFCOUNTERS;
if (SUCCEED != perf_collector_started())
{
*error = zbx_strdup(*error, "Performance collector is not started.");
goto out;
}
for (cptr = ppsd.pPerfCounterList; ; cptr = cptr->next)
{
/* add new parameters */
if (NULL == cptr)
{
cptr = (zbx_perf_counter_data_t *)zbx_malloc(cptr, sizeof(zbx_perf_counter_data_t));
/* initialize the counter */
memset(cptr, 0, sizeof(zbx_perf_counter_data_t));
if (NULL != name)
cptr->name = zbx_strdup(NULL, name);
cptr->counterpath = zbx_strdup(NULL, counterpath);
cptr->interval = interval;
cptr->lang = lang;
cptr->value_current = -1;
cptr->value_array = (double *)zbx_malloc(cptr->value_array, sizeof(double) * interval);
/* add the counter to the query */
pdh_status = zbx_PdhAddCounter(__func__, cptr, ppsd.pdh_query, counterpath,
lang, &cptr->handle);
cptr->next = ppsd.pPerfCounterList;
ppsd.pPerfCounterList = cptr;
if (ERROR_SUCCESS != pdh_status && PDH_CSTATUS_NO_INSTANCE != pdh_status)
{
*error = zbx_dsprintf(*error, "Invalid performance counter format.");
cptr = NULL; /* indicate a failure */
}
added = SUCCEED;
break;
}
if (NULL != name)
{
if (0 == strcmp(cptr->name, name))
break;
}
else if (0 == strcmp(cptr->counterpath, counterpath) &&
cptr->interval == interval && cptr->lang == lang)
{
break;
}
}
if (FAIL == added)
{
zabbix_log(LOG_LEVEL_DEBUG, "%s() counter '%s' already exists", __func__, counterpath);
}
else if (NULL != name && NULL != cptr)
{
char *alias_name;
alias_name = zbx_dsprintf(NULL, "__UserPerfCounter[%s]", name);
add_alias(name, alias_name);
zbx_free(alias_name);
}
out:
UNLOCK_PERFCOUNTERS;
zabbix_log(LOG_LEVEL_DEBUG, "End of %s(): %s", __func__, NULL == cptr ? "FAIL" : "SUCCEED");
return cptr;
}
/******************************************************************************
* *
* Function: extend_perf_counter_interval *
* *
* Purpose: extends the performance counter buffer to store the new data *
* interval *
* *
* Parameters: result - [IN] the performance counter *
* interval - [IN] the new data collection interval in seconds *
* *
******************************************************************************/
static void extend_perf_counter_interval(zbx_perf_counter_data_t *counter, int interval)
{
if (interval <= counter->interval)
return;
counter->value_array = (double *)zbx_realloc(counter->value_array, sizeof(double) * interval);
/* move the data to the end to keep the ring buffer intact */
if (counter->value_current < counter->value_count)
{
int i;
double *src, *dst;
src = &counter->value_array[counter->interval - 1];
dst = &counter->value_array[interval - 1];
for (i = 0; i < counter->value_count - counter->value_current; i++)
*dst-- = *src--;
}
counter->interval = interval;
}
static void free_object_names(void)
{
int i;
for (i = 0; i < object_num; i++)
{
zbx_free(object_names[i].eng_name);
zbx_free(object_names[i].loc_name);
}
zbx_free(object_names);
object_num = 0;
}
/******************************************************************************
* *
* Function: set_object_names *
* *
* Purpose: obtains PDH object localized names and associates them with *
* English names, to be used by perf_instance_en.discovery *
* *
* Return value: SUCCEED/FAIL *
* *
******************************************************************************/
static int set_object_names(void)
{
wchar_t *names_eng, *names_loc, *eng_name, *loc_name, *objects, *object, *p_eng = NULL, *p_loc = NULL;
DWORD sz = 0;
PDH_STATUS pdh_status;
BOOL refresh;
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
LOCK_PERFCOUNTERS;
if (ppsd.lastupdate_names + NAMES_UPDATE_INTERVAL >= time(NULL))
{
ret = SUCCEED;
goto out;
}
if (ppsd.lastrefresh_objects + OBJECT_CACHE_REFRESH_INTERVAL > time(NULL))
refresh = FALSE;
else
refresh = TRUE;
if (PDH_MORE_DATA != (pdh_status = PdhEnumObjects(NULL, NULL, NULL, &sz, PERF_DETAIL_WIZARD, refresh)))
{
zabbix_log(LOG_LEVEL_ERR, "cannot obtain required buffer size: %s",
strerror_from_module(pdh_status, L"PDH.DLL"));
goto out;
}
if (TRUE == refresh)
ppsd.lastrefresh_objects = time(NULL);
if (NULL == (p_eng = names_eng = get_all_counter_names(HKEY_PERFORMANCE_TEXT, L"Counter")) ||
NULL == (p_loc = names_loc = get_all_counter_names(HKEY_PERFORMANCE_NLSTEXT, L"Counter")))
{
goto out;
}
/* skip fields with number of records */
names_eng += wcslen(names_eng) + 1;
names_eng += wcslen(names_eng) + 1;
names_loc += wcslen(names_loc) + 1;
names_loc += wcslen(names_loc) + 1;
objects = zbx_malloc(NULL, (++sz) * sizeof(wchar_t));
if (ERROR_SUCCESS != (pdh_status = PdhEnumObjects(NULL, NULL, objects, &sz, PERF_DETAIL_WIZARD, FALSE)))
{
zabbix_log(LOG_LEVEL_ERR, "cannot obtain objects list: %s",
strerror_from_module(pdh_status, L"PDH.DLL"));
zbx_free(objects);
goto out;
}
free_object_names();
for (object = objects; L'\0' != *object; object += sz)
{
DWORD idx_eng, idx_loc;
sz = (DWORD)wcslen(object) + 1;
object_names = zbx_realloc(object_names, sizeof(struct object_name_ref) * (object_num + 1));
object_names[object_num].eng_name = NULL;
object_names[object_num].loc_name = zbx_malloc(NULL, sizeof(wchar_t) * sz);
memcpy(object_names[object_num].loc_name, object, sizeof(wchar_t) * sz);
/* For some objects the localized name might be missing and PdhEnumObjects() will return English */
/* name instead. In that case for localized name use name returned by PdhEnumObjects() if such name */
/* exists in English names registry (HKEY_PERFORMANCE_TEXT). */
idx_loc = 0;
for (loc_name = names_loc; L'\0' != *loc_name; loc_name += wcslen(loc_name) + 1)
{
DWORD idx;
idx = (DWORD)_wtoi(loc_name);
loc_name += wcslen(loc_name) + 1;
if (0 == wcscmp(object, loc_name))
{
idx_loc = idx;
break;
}
}
for (eng_name = names_eng; L'\0' != *eng_name; eng_name += wcslen(eng_name) + 1)
{
idx_eng = (DWORD)_wtoi(eng_name);
eng_name += wcslen(eng_name) + 1;
if (idx_loc == idx_eng ||
(0 == idx_loc && 0 == wcscmp(object_names[object_num].loc_name, eng_name)))
{
object_names[object_num].eng_name = zbx_unicode_to_utf8(eng_name);
break;
}
}
object_num++;
}
zbx_free(objects);
ppsd.lastupdate_names = time(NULL);
ret = SUCCEED;
out:
zbx_free(p_eng);
zbx_free(p_loc);
UNLOCK_PERFCOUNTERS;
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));
return ret;
}
/******************************************************************************
* *
* Comments: counter is removed from the collector and *
* the memory is freed - do not use it again *
* *
******************************************************************************/
void remove_perf_counter(zbx_perf_counter_data_t *counter)
{
zbx_perf_counter_data_t *cptr;
LOCK_PERFCOUNTERS;
if (NULL == counter || NULL == ppsd.pPerfCounterList)
goto out;
if (counter == ppsd.pPerfCounterList)
{
ppsd.pPerfCounterList = counter->next;
}
else
{
for (cptr = ppsd.pPerfCounterList; ; cptr = cptr->next)
{
if (cptr->next == counter)
{
cptr->next = counter->next;
break;
}
}
}
PdhRemoveCounter(counter->handle);
zbx_free(counter->name);
zbx_free(counter->counterpath);
zbx_free(counter->value_array);
zbx_free(counter);
out:
UNLOCK_PERFCOUNTERS;
}
static void free_perf_counter_list(void)
{
zbx_perf_counter_data_t *cptr;
while (NULL != ppsd.pPerfCounterList)
{
cptr = ppsd.pPerfCounterList;
ppsd.pPerfCounterList = cptr->next;
zbx_free(cptr->name);
zbx_free(cptr->counterpath);
zbx_free(cptr->value_array);
zbx_free(cptr);
}
}
/******************************************************************************
* *
* Comments: must be called only for PERF_COUNTER_ACTIVE counters, *
* interval must be less than or equal to counter->interval *
* *
******************************************************************************/
static double compute_average_value(zbx_perf_counter_data_t *counter, int interval)
{
double sum = 0;
int i, j, count;
if (PERF_COUNTER_ACTIVE != counter->status || interval > counter->interval)
return 0;
if (counter->interval == interval)
return counter->sum / (double)counter->value_count;
/* compute the average manually for custom intervals */
i = counter->value_current;
count = (counter->value_count < interval ? counter->value_count : interval);
/* cycle backwards through the circular buffer of values */
for (j = 0; j < count; j++, i = (0 < i ? i - 1 : counter->interval - 1))
sum += counter->value_array[i];
return sum / (double)count;
}
int init_perf_collector(zbx_threadedness_t threadedness, char **error)
{
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
switch (threadedness)
{
case ZBX_SINGLE_THREADED:
break;
case ZBX_MULTI_THREADED:
if (SUCCEED != zbx_mutex_create(&perfstat_access, ZBX_MUTEX_PERFSTAT, error))
goto out;
break;
default:
THIS_SHOULD_NEVER_HAPPEN;
*error = zbx_strdup(*error, "internal error");
goto out;
}
if (ERROR_SUCCESS != zbx_PdhOpenQuery(__func__, &ppsd.pdh_query))
{
*error = zbx_strdup(*error, "cannot open performance data query");
goto out;
}
ppsd.lastrefresh_objects = 0;
ppsd.lastupdate_names = 0;
if (SUCCEED != init_builtin_counter_indexes())
{
*error = zbx_strdup(*error, "cannot initialize built-in counter indexes");
goto out;
}
if (SUCCEED != set_object_names())
{
*error = zbx_strdup(*error, "cannot initialize object names");
goto out;
}
ret = SUCCEED;
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));
return ret;
}
void free_perf_collector(void)
{
zbx_perf_counter_data_t *cptr;
if (SUCCEED != perf_collector_started())
return;
for (cptr = ppsd.pPerfCounterList; cptr != NULL; cptr = cptr->next)
{
if (NULL != cptr->handle)
{
PdhRemoveCounter(cptr->handle);
cptr->handle = NULL;
}
}
PdhCloseQuery(ppsd.pdh_query);
ppsd.pdh_query = NULL;
LOCK_PERFCOUNTERS;
free_perf_counter_list();
free_object_names();
UNLOCK_PERFCOUNTERS;
zbx_mutex_destroy(&perfstat_access);
}
void collect_perfstat(void)
{
zbx_perf_counter_data_t *cptr;
PDH_STATUS pdh_status;
time_t now;
PDH_FMT_COUNTERVALUE value;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
LOCK_PERFCOUNTERS;
if (SUCCEED != perf_collector_started())
goto out;
if (NULL == ppsd.pPerfCounterList) /* no counters */
goto out;
now = time(NULL);
/* refresh unsupported counters */
for (cptr = ppsd.pPerfCounterList; NULL != cptr; cptr = cptr->next)
{
if (PERF_COUNTER_NOTSUPPORTED != cptr->status)
continue;
zbx_PdhAddCounter(__func__, cptr, ppsd.pdh_query, cptr->counterpath,
cptr->lang, &cptr->handle);
}
/* query for new data */
if (ERROR_SUCCESS != (pdh_status = PdhCollectQueryData(ppsd.pdh_query)))
{
for (cptr = ppsd.pPerfCounterList; NULL != cptr; cptr = cptr->next)
{
if (PERF_COUNTER_NOTSUPPORTED != cptr->status)
deactivate_perf_counter(cptr);
}
zabbix_log(LOG_LEVEL_DEBUG, "%s() call to PdhCollectQueryData() failed: %s",
__func__, strerror_from_module(pdh_status, L"PDH.DLL"));
goto out;
}
/* get the raw values */
for (cptr = ppsd.pPerfCounterList; NULL != cptr; cptr = cptr->next)
{
if (PERF_COUNTER_NOTSUPPORTED == cptr->status)
continue;
if (ERROR_SUCCESS != zbx_PdhGetRawCounterValue(__func__, cptr->counterpath,
cptr->handle, &cptr->rawValues[cptr->olderRawValue]))
{
deactivate_perf_counter(cptr);
continue;
}
cptr->olderRawValue = (cptr->olderRawValue + 1) & 1;
pdh_status = PdhCalculateCounterFromRawValue(cptr->handle, PDH_FMT_DOUBLE | PDH_FMT_NOCAP100,
&cptr->rawValues[(cptr->olderRawValue + 1) & 1],
(PERF_COUNTER_INITIALIZED < cptr->status ?
&cptr->rawValues[cptr->olderRawValue] : NULL), &value);
if (ERROR_SUCCESS == pdh_status && PDH_CSTATUS_VALID_DATA != value.CStatus &&
PDH_CSTATUS_NEW_DATA != value.CStatus)
{
pdh_status = value.CStatus;
}
if (PDH_CSTATUS_INVALID_DATA == pdh_status)
{
/* some (e.g., rate) counters require two raw values, MSDN lacks documentation */
/* about what happens but tests show that PDH_CSTATUS_INVALID_DATA is returned */
cptr->status = PERF_COUNTER_GET_SECOND_VALUE;
continue;
}
/* Negative values can occur when a counter rolls over. By default, this value entry does not appear */
/* in the registry and Performance Monitor does not log data errors or notify the user that it has */
/* received bad data; More info: https://support.microsoft.com/kb/177655/EN-US */
if (PDH_CALC_NEGATIVE_DENOMINATOR == pdh_status)
{
zabbix_log(LOG_LEVEL_DEBUG, "PDH_CALC_NEGATIVE_DENOMINATOR error occurred in counterpath '%s'."
" Value ignored", cptr->counterpath);
continue;
}
if (PDH_CALC_NEGATIVE_VALUE == pdh_status)
{
zabbix_log(LOG_LEVEL_DEBUG, "PDH_CALC_NEGATIVE_VALUE error occurred in counterpath '%s'."
" Value ignored", cptr->counterpath);
continue;
}
if (ERROR_SUCCESS == pdh_status)
{
cptr->status = PERF_COUNTER_ACTIVE;
cptr->value_current = (cptr->value_current + 1) % cptr->interval
/* remove the oldest value, value_count will not increase */;
if (cptr->value_count == cptr->interval)
cptr->sum -= cptr->value_array[cptr->value_current];
cptr->value_array[cptr->value_current] = value.doubleValue;
cptr->sum += cptr->value_array[cptr->value_current];
if (cptr->value_count < cptr->interval)
cptr->value_count++;
}
else
{
zabbix_log(LOG_LEVEL_WARNING, "cannot calculate performance counter value \"%s\": %s",
cptr->counterpath, strerror_from_module(pdh_status, L"PDH.DLL"));
deactivate_perf_counter(cptr);
}
}
out:
UNLOCK_PERFCOUNTERS;
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Function: get_perf_counter_value_by_name *
* *
* Purpose: gets average named performance counter value *
* *
* Parameters: name - [IN] the performance counter name *
* value - [OUT] the calculated value *
* error - [OUT] the error message, it is not always produced *
* when FAIL is returned. It is a caller responsibility *
* to check if the error message is not NULL. *
* *
* Returns: SUCCEED - the value was retrieved successfully *
* FAIL - otherwise *
* *
* Comments: The value is retrieved from collector (if it has been requested *
* before) or directly from Windows performance counters if *
* possible. *
* *
******************************************************************************/
int get_perf_counter_value_by_name(const char *name, double *value, char **error)
{
int ret = FAIL;
zbx_perf_counter_data_t *perfs = NULL;
char *counterpath = NULL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() name:%s", __func__, name);
LOCK_PERFCOUNTERS;
if (SUCCEED != perf_collector_started())
{
*error = zbx_strdup(*error, "Performance collector is not started.");
goto out;
}
for (perfs = ppsd.pPerfCounterList; NULL != perfs; perfs = perfs->next)
{
if (NULL != perfs->name && 0 == strcmp(perfs->name, name))
{
if (PERF_COUNTER_ACTIVE != perfs->status)
break;
/* the counter data is already being collected, return it */
*value = compute_average_value(perfs, perfs->interval);
ret = SUCCEED;
goto out;
}
}
/* we can retrieve named counter data only if it has been registered before */
if (NULL == perfs)
{
*error = zbx_dsprintf(*error, "Unknown performance counter name: %s.", name);
goto out;
}
counterpath = zbx_strdup(counterpath, perfs->counterpath);
out:
UNLOCK_PERFCOUNTERS;
if (NULL != counterpath)
{
/* request counter value directly from Windows performance counters */
PDH_STATUS pdh_status = calculate_counter_value(__func__, counterpath, perfs->lang, value);
if (PDH_NOT_IMPLEMENTED == pdh_status)
*error = zbx_strdup(*error, "Counter is not supported for this Microsoft Windows version");
else if (ERROR_SUCCESS == pdh_status)
ret = SUCCEED;
zbx_free(counterpath);
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));
return ret;
}
/******************************************************************************
* *
* Function: get_perf_counter_value_by_path *
* *
* Purpose: gets average performance counter value *
* *
* Parameters: counterpath - [IN] the performance counter path *
* interval - [IN] the data collection interval in seconds *
* lang - [IN] counterpath language (default or English) *
* value - [OUT] the calculated value *
* error - [OUT] the error message *
* *
* Returns: SUCCEED - the value was retrieved successfully *
* FAIL - otherwise *
* *
* Comments: The value is retrieved from collector (if it has been requested *
* before) or directly from Windows performance counters if *
* possible. *
* *
******************************************************************************/
int get_perf_counter_value_by_path(const char *counterpath, int interval, zbx_perf_counter_lang_t lang,
double *value, char **error)
{
int ret = FAIL;
zbx_perf_counter_data_t *perfs = NULL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() path:%s interval:%d lang:%d", __func__, counterpath,
interval, lang);
LOCK_PERFCOUNTERS;
if (SUCCEED != perf_collector_started())
{
*error = zbx_strdup(*error, "Performance collector is not started.");
goto out;
}
for (perfs = ppsd.pPerfCounterList; NULL != perfs; perfs = perfs->next)
{
if (0 == strcmp(perfs->counterpath, counterpath) && perfs->lang == lang)
{
if (perfs->interval < interval)
extend_perf_counter_interval(perfs, interval);
if (PERF_COUNTER_ACTIVE != perfs->status)
break;
/* the counter data is already being collected, return it */
*value = compute_average_value(perfs, interval);
ret = SUCCEED;
goto out;
}
}
/* if the requested counter is not already being monitored - start monitoring */
if (NULL == perfs)
perfs = add_perf_counter(NULL, counterpath, interval, lang, error);
out:
UNLOCK_PERFCOUNTERS;
if (SUCCEED != ret && NULL != perfs)
{
/* request counter value directly from Windows performance counters */
if (ERROR_SUCCESS == calculate_counter_value(__func__, counterpath, lang, value))
ret = SUCCEED;
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));
return ret;
}
/******************************************************************************
* *
* Function: get_perf_counter_value *
* *
* Purpose: gets average value of the specified performance counter interval *
* *
* Parameters: counter - [IN] the performance counter *
* interval - [IN] the data collection interval in seconds *
* value - [OUT] the calculated value *
* error - [OUT] the error message *
* *
* Returns: SUCCEED - the value was retrieved successfully *
* FAIL - otherwise *
* *
******************************************************************************/
int get_perf_counter_value(zbx_perf_counter_data_t *counter, int interval, double *value, char **error)
{
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() path:%s interval:%d", __func__, counter->counterpath, interval);
LOCK_PERFCOUNTERS;
if (SUCCEED != perf_collector_started())
{
*error = zbx_strdup(*error, "Performance collector is not started.");
goto out;
}
if (PERF_COUNTER_ACTIVE != counter->status)
{
*error = zbx_strdup(*error, "Performance counter is not ready.");
goto out;
}
*value = compute_average_value(counter, interval);
ret = SUCCEED;
out:
UNLOCK_PERFCOUNTERS;
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));
return ret;
}
int refresh_object_cache(void)
{
DWORD sz = 0;
int ret = SUCCEED;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
LOCK_PERFCOUNTERS;
if (ppsd.lastrefresh_objects + OBJECT_CACHE_REFRESH_INTERVAL < time(NULL))
{
if (PDH_MORE_DATA != PdhEnumObjects(NULL, NULL, NULL, &sz, PERF_DETAIL_WIZARD, TRUE))
{
ret = FAIL;
goto out;
}
ppsd.lastrefresh_objects = time(NULL);
}
out:
UNLOCK_PERFCOUNTERS;
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));
return ret;
}
static wchar_t *get_object_name(char *eng_name)
{
wchar_t *loc_name = NULL;
int i;
size_t len;
LOCK_PERFCOUNTERS;
len = strlen(eng_name);
for (i = 0; i < object_num; i++)
{
if (NULL != object_names[i].eng_name && len == strlen(object_names[i].eng_name) &&
0 == zbx_strncasecmp(object_names[i].eng_name, eng_name, len))
{
size_t sz;
sz = (wcslen(object_names[i].loc_name) + 1) * sizeof(wchar_t);
loc_name = zbx_malloc(NULL, sz);
memcpy(loc_name, object_names[i].loc_name, sz);
break;
}
}
UNLOCK_PERFCOUNTERS;
return loc_name;
}
/******************************************************************************
* *
* Function: get_object_name_local *
* *
* Purpose: get localized name of the object *
* *
* Parameters: eng_name - [IN] english name *
* *
* Returns: localized name of the object *
* *
******************************************************************************/
wchar_t *get_object_name_local(char *eng_name)
{
wchar_t *name;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
if (NULL == (name = get_object_name(eng_name)) && SUCCEED == set_object_names())
name = get_object_name(eng_name);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
return name;
}
|