2 * collectd - src/perl.c
3 * Copyright (C) 2007, 2008 Sebastian Harl
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Sebastian Harl <sh at tokkee.org>
23 * This plugin embeds a Perl interpreter into collectd and provides an
24 * interface for collectd plugins written in perl.
27 /* do not automatically get the thread specific perl interpreter */
28 #define PERL_NO_GET_CONTEXT
30 #define DONT_POISON_SPRINTF_YET 1
32 #undef DONT_POISON_SPRINTF_YET
34 #include "configfile.h"
39 #if defined(COLLECT_DEBUG) && COLLECT_DEBUG && defined(__GNUC__) && __GNUC__
40 # pragma GCC poison sprintf
45 /* Some versions of Perl define their own version of DEBUG... :-/ */
50 /* ... while we want the definition found in plugin.h. */
56 #if !defined(USE_ITHREADS)
57 # error "Perl does not support ithreads!"
58 #endif /* !defined(USE_ITHREADS) */
60 /* clear the Perl sub's stack frame
61 * (this should only be used inside an XSUB) */
62 #define CLEAR_STACK_FRAME PL_stack_sp = PL_stack_base + *PL_markstack_ptr
66 #define PLUGIN_WRITE 2
67 #define PLUGIN_SHUTDOWN 3
69 #define PLUGIN_NOTIF 5
70 #define PLUGIN_FLUSH 6
72 #define PLUGIN_TYPES 7
74 #define PLUGIN_CONFIG 254
75 #define PLUGIN_DATASET 255
77 #define log_debug(...) DEBUG ("perl: " __VA_ARGS__)
78 #define log_info(...) INFO ("perl: " __VA_ARGS__)
79 #define log_warn(...) WARNING ("perl: " __VA_ARGS__)
80 #define log_err(...) ERROR ("perl: " __VA_ARGS__)
82 /* this is defined in DynaLoader.a */
83 void boot_DynaLoader (PerlInterpreter *, CV *);
85 static XS (Collectd_plugin_register_ds);
86 static XS (Collectd_plugin_unregister_ds);
87 static XS (Collectd_plugin_dispatch_values);
88 static XS (Collectd__plugin_flush);
89 static XS (Collectd_plugin_dispatch_notification);
90 static XS (Collectd_plugin_log);
91 static XS (Collectd_call_by_name);
97 typedef struct c_ithread_s {
98 /* the thread's Perl interpreter */
99 PerlInterpreter *interp;
101 /* double linked list of threads */
102 struct c_ithread_s *prev;
103 struct c_ithread_s *next;
111 /* some usage stats */
112 int number_of_threads;
113 #endif /* COLLECT_DEBUG */
115 pthread_mutex_t mutex;
122 /* if perl_threads != NULL perl_threads->head must
123 * point to the "base" thread */
124 static c_ithread_list_t *perl_threads = NULL;
126 /* the key used to store each pthread's ithread */
127 static pthread_key_t perl_thr_key;
129 static int perl_argc = 0;
130 static char **perl_argv = NULL;
132 static char base_name[DATA_MAX_NAME_LEN] = "";
139 { "Collectd::plugin_register_data_set", Collectd_plugin_register_ds },
140 { "Collectd::plugin_unregister_data_set", Collectd_plugin_unregister_ds },
141 { "Collectd::plugin_dispatch_values", Collectd_plugin_dispatch_values },
142 { "Collectd::_plugin_flush", Collectd__plugin_flush },
143 { "Collectd::plugin_dispatch_notification",
144 Collectd_plugin_dispatch_notification },
145 { "Collectd::plugin_log", Collectd_plugin_log },
146 { "Collectd::call_by_name", Collectd_call_by_name },
155 { "Collectd::TYPE_INIT", PLUGIN_INIT },
156 { "Collectd::TYPE_READ", PLUGIN_READ },
157 { "Collectd::TYPE_WRITE", PLUGIN_WRITE },
158 { "Collectd::TYPE_SHUTDOWN", PLUGIN_SHUTDOWN },
159 { "Collectd::TYPE_LOG", PLUGIN_LOG },
160 { "Collectd::TYPE_NOTIF", PLUGIN_NOTIF },
161 { "Collectd::TYPE_FLUSH", PLUGIN_FLUSH },
162 { "Collectd::TYPE_CONFIG", PLUGIN_CONFIG },
163 { "Collectd::TYPE_DATASET", PLUGIN_DATASET },
164 { "Collectd::DS_TYPE_COUNTER", DS_TYPE_COUNTER },
165 { "Collectd::DS_TYPE_GAUGE", DS_TYPE_GAUGE },
166 { "Collectd::LOG_ERR", LOG_ERR },
167 { "Collectd::LOG_WARNING", LOG_WARNING },
168 { "Collectd::LOG_NOTICE", LOG_NOTICE },
169 { "Collectd::LOG_INFO", LOG_INFO },
170 { "Collectd::LOG_DEBUG", LOG_DEBUG },
171 { "Collectd::NOTIF_FAILURE", NOTIF_FAILURE },
172 { "Collectd::NOTIF_WARNING", NOTIF_WARNING },
173 { "Collectd::NOTIF_OKAY", NOTIF_OKAY },
182 { "Collectd::hostname_g", hostname_g },
191 { "Collectd::interval_g", &interval_g },
196 * Helper functions for data type conversion.
211 static int hv2data_source (pTHX_ HV *hash, data_source_t *ds)
215 if ((NULL == hash) || (NULL == ds))
218 if (NULL != (tmp = hv_fetch (hash, "name", 4, 0))) {
219 sstrncpy (ds->name, SvPV_nolen (*tmp), sizeof (ds->name));
222 log_err ("hv2data_source: No DS name given.");
226 if (NULL != (tmp = hv_fetch (hash, "type", 4, 0))) {
227 ds->type = SvIV (*tmp);
229 if ((DS_TYPE_COUNTER != ds->type) && (DS_TYPE_GAUGE != ds->type)) {
230 log_err ("hv2data_source: Invalid DS type.");
235 ds->type = DS_TYPE_COUNTER;
238 if (NULL != (tmp = hv_fetch (hash, "min", 3, 0)))
239 ds->min = SvNV (*tmp);
243 if (NULL != (tmp = hv_fetch (hash, "max", 3, 0)))
244 ds->max = SvNV (*tmp);
248 } /* static int hv2data_source (HV *, data_source_t *) */
250 static int av2value (pTHX_ char *name, AV *array, value_t *value, int len)
252 const data_set_t *ds;
256 if ((NULL == name) || (NULL == array) || (NULL == value))
259 if (av_len (array) < len - 1)
260 len = av_len (array) + 1;
265 ds = plugin_get_ds (name);
267 log_err ("av2value: Unknown dataset \"%s\"", name);
271 if (ds->ds_num < len) {
272 log_warn ("av2value: Value length exceeds data set length.");
276 for (i = 0; i < len; ++i) {
277 SV **tmp = av_fetch (array, i, 0);
280 if (DS_TYPE_COUNTER == ds->ds[i].type)
281 value[i].counter = SvIV (*tmp);
283 value[i].gauge = SvNV (*tmp);
290 } /* static int av2value (char *, AV *, value_t *, int) */
295 * values => [ @values ],
299 * plugin_instance => $pinstance,
300 * type_instance => $tinstance,
303 static int hv2value_list (pTHX_ HV *hash, value_list_t *vl)
307 if ((NULL == hash) || (NULL == vl))
310 if (NULL == (tmp = hv_fetch (hash, "type", 4, 0))) {
311 log_err ("hv2value_list: No type given.");
315 sstrncpy (vl->type, SvPV_nolen (*tmp), sizeof (vl->type));
317 if ((NULL == (tmp = hv_fetch (hash, "values", 6, 0)))
318 || (! (SvROK (*tmp) && (SVt_PVAV == SvTYPE (SvRV (*tmp)))))) {
319 log_err ("hv2value_list: No valid values given.");
324 AV *array = (AV *)SvRV (*tmp);
325 int len = av_len (array) + 1;
330 vl->values = (value_t *)smalloc (len * sizeof (value_t));
331 vl->values_len = av2value (aTHX_ vl->type, (AV *)SvRV (*tmp),
334 if (-1 == vl->values_len) {
340 if (NULL != (tmp = hv_fetch (hash, "time", 4, 0))) {
341 vl->time = (time_t)SvIV (*tmp);
344 if (NULL != (tmp = hv_fetch (hash, "host", 4, 0))) {
345 sstrncpy (vl->host, SvPV_nolen (*tmp), sizeof (vl->host));
348 sstrncpy (vl->host, hostname_g, sizeof (vl->host));
351 if (NULL != (tmp = hv_fetch (hash, "plugin", 6, 0)))
352 sstrncpy (vl->plugin, SvPV_nolen (*tmp), sizeof (vl->plugin));
354 if (NULL != (tmp = hv_fetch (hash, "plugin_instance", 15, 0)))
355 sstrncpy (vl->plugin_instance, SvPV_nolen (*tmp),
356 sizeof (vl->plugin_instance));
358 if (NULL != (tmp = hv_fetch (hash, "type_instance", 13, 0)))
359 sstrncpy (vl->type_instance, SvPV_nolen (*tmp),
360 sizeof (vl->type_instance));
362 } /* static int hv2value_list (pTHX_ HV *, value_list_t *) */
364 static int av2data_set (pTHX_ AV *array, char *name, data_set_t *ds)
368 if ((NULL == array) || (NULL == name) || (NULL == ds))
371 len = av_len (array);
374 log_err ("av2data_set: Invalid data set.");
378 ds->ds = (data_source_t *)smalloc ((len + 1) * sizeof (data_source_t));
379 ds->ds_num = len + 1;
381 for (i = 0; i <= len; ++i) {
382 SV **elem = av_fetch (array, i, 0);
385 log_err ("av2data_set: Failed to fetch data source %i.", i);
389 if (! (SvROK (*elem) && (SVt_PVHV == SvTYPE (SvRV (*elem))))) {
390 log_err ("av2data_set: Invalid data source.");
394 if (-1 == hv2data_source (aTHX_ (HV *)SvRV (*elem), &ds->ds[i]))
397 log_debug ("av2data_set: "
398 "DS.name = \"%s\", DS.type = %i, DS.min = %f, DS.max = %f",
399 ds->ds[i].name, ds->ds[i].type, ds->ds[i].min, ds->ds[i].max);
402 sstrncpy (ds->type, name, sizeof (ds->type));
404 } /* static int av2data_set (pTHX_ AV *, data_set_t *) */
406 static int data_set2av (pTHX_ data_set_t *ds, AV *array)
410 if ((NULL == ds) || (NULL == array))
413 av_extend (array, ds->ds_num);
415 for (i = 0; i < ds->ds_num; ++i) {
416 HV *source = newHV ();
418 if (NULL == hv_store (source, "name", 4,
419 newSVpv (ds->ds[i].name, 0), 0))
422 if (NULL == hv_store (source, "type", 4, newSViv (ds->ds[i].type), 0))
425 if (! isnan (ds->ds[i].min))
426 if (NULL == hv_store (source, "min", 3,
427 newSVnv (ds->ds[i].min), 0))
430 if (! isnan (ds->ds[i].max))
431 if (NULL == hv_store (source, "max", 3,
432 newSVnv (ds->ds[i].max), 0))
435 if (NULL == av_store (array, i, newRV_noinc ((SV *)source)))
439 } /* static int data_set2av (data_set_t *, AV *) */
441 static int value_list2hv (pTHX_ value_list_t *vl, data_set_t *ds, HV *hash)
448 if ((NULL == vl) || (NULL == ds) || (NULL == hash))
451 len = vl->values_len;
453 if (ds->ds_num < len) {
454 log_warn ("value2av: Value length exceeds data set length.");
459 av_extend (values, len - 1);
461 for (i = 0; i < len; ++i) {
464 if (DS_TYPE_COUNTER == ds->ds[i].type)
465 val = newSViv (vl->values[i].counter);
467 val = newSVnv (vl->values[i].gauge);
469 if (NULL == av_store (values, i, val)) {
475 if (NULL == hv_store (hash, "values", 6, newRV_noinc ((SV *)values), 0))
479 if (NULL == hv_store (hash, "time", 4, newSViv (vl->time), 0))
482 if ('\0' != vl->host[0])
483 if (NULL == hv_store (hash, "host", 4, newSVpv (vl->host, 0), 0))
486 if ('\0' != vl->plugin[0])
487 if (NULL == hv_store (hash, "plugin", 6, newSVpv (vl->plugin, 0), 0))
490 if ('\0' != vl->plugin_instance[0])
491 if (NULL == hv_store (hash, "plugin_instance", 15,
492 newSVpv (vl->plugin_instance, 0), 0))
495 if ('\0' != vl->type[0])
496 if (NULL == hv_store (hash, "type", 4, newSVpv (vl->type, 0), 0))
499 if ('\0' != vl->type_instance[0])
500 if (NULL == hv_store (hash, "type_instance", 13,
501 newSVpv (vl->type_instance, 0), 0))
504 } /* static int value2av (value_list_t *, data_set_t *, HV *) */
506 static int notification2hv (pTHX_ notification_t *n, HV *hash)
508 if (NULL == hv_store (hash, "severity", 8, newSViv (n->severity), 0))
512 if (NULL == hv_store (hash, "time", 4, newSViv (n->time), 0))
515 if ('\0' != *n->message)
516 if (NULL == hv_store (hash, "message", 7, newSVpv (n->message, 0), 0))
519 if ('\0' != *n->host)
520 if (NULL == hv_store (hash, "host", 4, newSVpv (n->host, 0), 0))
523 if ('\0' != *n->plugin)
524 if (NULL == hv_store (hash, "plugin", 6, newSVpv (n->plugin, 0), 0))
527 if ('\0' != *n->plugin_instance)
528 if (NULL == hv_store (hash, "plugin_instance", 15,
529 newSVpv (n->plugin_instance, 0), 0))
532 if ('\0' != *n->type)
533 if (NULL == hv_store (hash, "type", 4, newSVpv (n->type, 0), 0))
536 if ('\0' != *n->type_instance)
537 if (NULL == hv_store (hash, "type_instance", 13,
538 newSVpv (n->type_instance, 0), 0))
541 } /* static int notification2hv (notification_t *, HV *) */
543 static int oconfig_item2hv (pTHX_ oconfig_item_t *ci, HV *hash)
550 if (NULL == hv_store (hash, "key", 3, newSVpv (ci->key, 0), 0))
554 if (0 < ci->values_num)
555 av_extend (values, ci->values_num);
557 if (NULL == hv_store (hash, "values", 6, newRV_noinc ((SV *)values), 0)) {
563 for (i = 0; i < ci->values_num; ++i) {
566 switch (ci->values[i].type) {
567 case OCONFIG_TYPE_STRING:
568 value = newSVpv (ci->values[i].value.string, 0);
570 case OCONFIG_TYPE_NUMBER:
571 value = newSVnv ((NV)ci->values[i].value.number);
573 case OCONFIG_TYPE_BOOLEAN:
574 value = ci->values[i].value.boolean ? &PL_sv_yes : &PL_sv_no;
577 log_err ("oconfig_item2hv: Invalid value type %i.",
579 value = &PL_sv_undef;
582 if (NULL == av_store (values, i, value)) {
588 /* ignoring 'parent' member which is uninteresting in this case */
591 if (0 < ci->children_num)
592 av_extend (children, ci->children_num);
594 if (NULL == hv_store (hash, "children", 8, newRV_noinc ((SV *)children), 0)) {
600 for (i = 0; i < ci->children_num; ++i) {
601 HV *child = newHV ();
603 if (0 != oconfig_item2hv (aTHX_ ci->children + i, child)) {
609 if (NULL == av_store (children, i, newRV_noinc ((SV *)child))) {
616 } /* static int oconfig_item2hv (pTHX_ oconfig_item_t *, HV *) */
619 * Internal functions.
622 static char *get_module_name (char *buf, size_t buf_len, const char *module) {
624 if (base_name[0] == '\0')
625 status = ssnprintf (buf, buf_len, "%s", module);
627 status = ssnprintf (buf, buf_len, "%s::%s", base_name, module);
628 if ((status < 0) || ((unsigned int)status >= buf_len))
631 } /* char *get_module_name */
634 * Add a plugin's data set definition.
636 static int pplugin_register_data_set (pTHX_ char *name, AV *dataset)
642 if ((NULL == name) || (NULL == dataset))
645 if (0 != av2data_set (aTHX_ dataset, name, &ds))
648 ret = plugin_register_data_set (&ds);
652 } /* static int pplugin_register_data_set (char *, SV *) */
655 * Remove a plugin's data set definition.
657 static int pplugin_unregister_data_set (char *name)
661 return plugin_unregister_data_set (name);
662 } /* static int pplugin_unregister_data_set (char *) */
665 * Submit the values to the write functions.
667 static int pplugin_dispatch_values (pTHX_ HV *values)
669 value_list_t vl = VALUE_LIST_INIT;
676 if (0 != hv2value_list (aTHX_ values, &vl))
679 ret = plugin_dispatch_values (&vl);
683 } /* static int pplugin_dispatch_values (char *, HV *) */
686 * Dispatch a notification.
690 * severity => $severity,
696 * plugin_instance => $instance,
697 * type_instance => $type_instance
700 static int pplugin_dispatch_notification (pTHX_ HV *notif)
709 memset (&n, 0, sizeof (n));
711 if (NULL != (tmp = hv_fetch (notif, "severity", 8, 0)))
712 n.severity = SvIV (*tmp);
714 n.severity = NOTIF_FAILURE;
716 if (NULL != (tmp = hv_fetch (notif, "time", 4, 0)))
717 n.time = (time_t)SvIV (*tmp);
719 n.time = time (NULL);
721 if (NULL != (tmp = hv_fetch (notif, "message", 7, 0)))
722 sstrncpy (n.message, SvPV_nolen (*tmp), sizeof (n.message));
724 if (NULL != (tmp = hv_fetch (notif, "host", 4, 0)))
725 sstrncpy (n.host, SvPV_nolen (*tmp), sizeof (n.host));
727 sstrncpy (n.host, hostname_g, sizeof (n.host));
729 if (NULL != (tmp = hv_fetch (notif, "plugin", 6, 0)))
730 sstrncpy (n.plugin, SvPV_nolen (*tmp), sizeof (n.plugin));
732 if (NULL != (tmp = hv_fetch (notif, "plugin_instance", 15, 0)))
733 sstrncpy (n.plugin_instance, SvPV_nolen (*tmp),
734 sizeof (n.plugin_instance));
736 if (NULL != (tmp = hv_fetch (notif, "type", 4, 0)))
737 sstrncpy (n.type, SvPV_nolen (*tmp), sizeof (n.type));
739 if (NULL != (tmp = hv_fetch (notif, "type_instance", 13, 0)))
740 sstrncpy (n.type_instance, SvPV_nolen (*tmp), sizeof (n.type_instance));
741 return plugin_dispatch_notification (&n);
742 } /* static int pplugin_dispatch_notification (HV *) */
745 * Call all working functions of the given type.
747 static int pplugin_call_all (pTHX_ int type, ...)
756 if ((type < 0) || (type >= PLUGIN_TYPES))
766 XPUSHs (sv_2mortal (newSViv ((IV)type)));
768 if (PLUGIN_WRITE == type) {
770 * $_[0] = $plugin_type;
785 * values => [ $v1, ... ],
790 * plugin_instance => $instance,
791 * type_instance => $type_instance
800 ds = va_arg (ap, data_set_t *);
801 vl = va_arg (ap, value_list_t *);
803 if (-1 == data_set2av (aTHX_ ds, pds)) {
810 if (-1 == value_list2hv (aTHX_ vl, ds, pvl)) {
817 XPUSHs (sv_2mortal (newSVpv (ds->type, 0)));
818 XPUSHs (sv_2mortal (newRV_noinc ((SV *)pds)));
819 XPUSHs (sv_2mortal (newRV_noinc ((SV *)pvl)));
821 else if (PLUGIN_LOG == type) {
827 XPUSHs (sv_2mortal (newSViv (va_arg (ap, int))));
828 XPUSHs (sv_2mortal (newSVpv (va_arg (ap, char *), 0)));
830 else if (PLUGIN_NOTIF == type) {
834 * severity => $severity,
840 * plugin_instance => $instance,
841 * type_instance => $type_instance
845 HV *notif = newHV ();
847 n = va_arg (ap, notification_t *);
849 if (-1 == notification2hv (aTHX_ n, notif)) {
856 XPUSHs (sv_2mortal (newRV_noinc ((SV *)notif)));
858 else if (PLUGIN_FLUSH == type) {
861 * $_[1] = $identifier;
863 XPUSHs (sv_2mortal (newSViv (va_arg (ap, int))));
864 XPUSHs (sv_2mortal (newSVpv (va_arg (ap, char *), 0)));
869 retvals = call_pv ("Collectd::plugin_call_all", G_SCALAR);
884 } /* static int pplugin_call_all (int, ...) */
891 * Collectd::plugin_register_data_set (type, dataset).
894 * type of the dataset
897 * dataset to be registered
899 static XS (Collectd_plugin_register_ds)
907 log_err ("Usage: Collectd::plugin_register_data_set(type, dataset)");
911 log_debug ("Collectd::plugin_register_data_set: "
912 "type = \"%s\", dataset = \"%s\"",
913 SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
917 if (SvROK (data) && (SVt_PVAV == SvTYPE (SvRV (data)))) {
918 ret = pplugin_register_data_set (aTHX_ SvPV_nolen (ST (0)),
922 log_err ("Collectd::plugin_register_data_set: Invalid data.");
930 } /* static XS (Collectd_plugin_register_ds) */
933 * Collectd::plugin_unregister_data_set (type).
936 * type of the dataset
938 static XS (Collectd_plugin_unregister_ds)
943 log_err ("Usage: Collectd::plugin_unregister_data_set(type)");
947 log_debug ("Collectd::plugin_unregister_data_set: type = \"%s\"",
948 SvPV_nolen (ST (0)));
950 if (0 == pplugin_unregister_data_set (SvPV_nolen (ST (0))))
954 } /* static XS (Collectd_plugin_register_ds) */
957 * Collectd::plugin_dispatch_values (name, values).
963 * value list to submit
965 static XS (Collectd_plugin_dispatch_values)
975 log_warn ("Collectd::plugin_dispatch_values with two arguments "
976 "is deprecated - pass the type through values->{type}.");
979 else if (1 != items) {
980 log_err ("Usage: Collectd::plugin_dispatch_values(values)");
984 log_debug ("Collectd::plugin_dispatch_values: values=\"%s\"",
985 SvPV_nolen (ST (values_idx)));
987 values = ST (values_idx);
989 if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
990 log_err ("Collectd::plugin_dispatch_values: Invalid values.");
994 if (((2 == items) && (NULL == ST (0))) || (NULL == values))
997 if ((2 == items) && (NULL == hv_store ((HV *)SvRV (values), "type", 4,
998 newSVsv (ST (0)), 0))) {
999 log_err ("Collectd::plugin_dispatch_values: Could not store type.");
1003 ret = pplugin_dispatch_values (aTHX_ (HV *)SvRV (values));
1009 } /* static XS (Collectd_plugin_dispatch_values) */
1012 * Collectd::_plugin_flush (plugin, timeout, identifier).
1015 * name of the plugin to flush
1018 * timeout to use when flushing the data
1021 * data-set identifier to flush
1023 static XS (Collectd__plugin_flush)
1025 char *plugin = NULL;
1032 log_err ("Usage: Collectd::_plugin_flush(plugin, timeout, id)");
1037 plugin = SvPV_nolen (ST (0));
1040 timeout = (int)SvIV (ST (1));
1043 id = SvPV_nolen (ST (2));
1045 log_debug ("Collectd::_plugin_flush: plugin = \"%s\", timeout = %i, "
1046 "id = \"%s\"", plugin, timeout, id);
1048 if (0 == plugin_flush (plugin, timeout, id))
1052 } /* static XS (Collectd__plugin_flush) */
1055 * Collectd::plugin_dispatch_notification (notif).
1058 * notification to dispatch
1060 static XS (Collectd_plugin_dispatch_notification)
1069 log_err ("Usage: Collectd::plugin_dispatch_notification(notif)");
1073 log_debug ("Collectd::plugin_dispatch_notification: notif = \"%s\"",
1074 SvPV_nolen (ST (0)));
1078 if (! (SvROK (notif) && (SVt_PVHV == SvTYPE (SvRV (notif))))) {
1079 log_err ("Collectd::plugin_dispatch_notification: Invalid notif.");
1083 ret = pplugin_dispatch_notification (aTHX_ (HV *)SvRV (notif));
1089 } /* static XS (Collectd_plugin_dispatch_notification) */
1092 * Collectd::plugin_log (level, message).
1095 * log level (LOG_DEBUG, ... LOG_ERR)
1100 static XS (Collectd_plugin_log)
1105 log_err ("Usage: Collectd::plugin_log(level, message)");
1109 plugin_log (SvIV (ST (0)), "%s", SvPV_nolen (ST (1)));
1111 } /* static XS (Collectd_plugin_log) */
1114 * Collectd::call_by_name (...).
1116 * Call a Perl sub identified by its name passed through $Collectd::cb_name.
1118 static XS (Collectd_call_by_name)
1123 if (NULL == (tmp = get_sv ("Collectd::cb_name", 0))) {
1124 sv_setpv (get_sv ("@", 1), "cb_name has not been set");
1129 name = SvPV_nolen (tmp);
1131 if (NULL == get_cv (name, 0)) {
1132 sv_setpvf (get_sv ("@", 1), "unknown callback \"%s\"", name);
1137 /* simply pass on the subroutine call without touching the stack,
1138 * thus leaving any arguments and return values in place */
1140 } /* static XS (Collectd_call_by_name) */
1143 * collectd's perl interpreter based thread implementation.
1145 * This has been inspired by Perl's ithreads introduced in version 5.6.0.
1148 /* must be called with perl_threads->mutex locked */
1149 static void c_ithread_destroy (c_ithread_t *ithread)
1151 dTHXa (ithread->interp);
1153 assert (NULL != perl_threads);
1155 PERL_SET_CONTEXT (aTHX);
1156 log_debug ("Shutting down Perl interpreter %p...", aTHX);
1161 --perl_threads->number_of_threads;
1162 #endif /* COLLECT_DEBUG */
1164 perl_destruct (aTHX);
1167 if (NULL == ithread->prev)
1168 perl_threads->head = ithread->next;
1170 ithread->prev->next = ithread->next;
1172 if (NULL == ithread->next)
1173 perl_threads->tail = ithread->prev;
1175 ithread->next->prev = ithread->prev;
1179 } /* static void c_ithread_destroy (c_ithread_t *) */
1181 static void c_ithread_destructor (void *arg)
1183 c_ithread_t *ithread = (c_ithread_t *)arg;
1184 c_ithread_t *t = NULL;
1186 if (NULL == perl_threads)
1189 pthread_mutex_lock (&perl_threads->mutex);
1191 for (t = perl_threads->head; NULL != t; t = t->next)
1195 /* the ithread no longer exists */
1199 c_ithread_destroy (ithread);
1201 pthread_mutex_unlock (&perl_threads->mutex);
1203 } /* static void c_ithread_destructor (void *) */
1205 /* must be called with perl_threads->mutex locked */
1206 static c_ithread_t *c_ithread_create (PerlInterpreter *base)
1208 c_ithread_t *t = NULL;
1211 assert (NULL != perl_threads);
1213 t = (c_ithread_t *)smalloc (sizeof (c_ithread_t));
1214 memset (t, 0, sizeof (c_ithread_t));
1216 t->interp = (NULL == base)
1218 : perl_clone (base, CLONEf_KEEP_PTR_TABLE);
1222 if ((NULL != base) && (NULL != PL_endav)) {
1223 av_clear (PL_endav);
1224 av_undef (PL_endav);
1229 ++perl_threads->number_of_threads;
1230 #endif /* COLLECT_DEBUG */
1234 if (NULL == perl_threads->tail) {
1235 perl_threads->head = t;
1239 perl_threads->tail->next = t;
1240 t->prev = perl_threads->tail;
1243 perl_threads->tail = t;
1245 pthread_setspecific (perl_thr_key, (const void *)t);
1247 } /* static c_ithread_t *c_ithread_create (PerlInterpreter *) */
1250 * Interface to collectd.
1253 static int perl_init (void)
1257 if (NULL == perl_threads)
1261 c_ithread_t *t = NULL;
1263 pthread_mutex_lock (&perl_threads->mutex);
1264 t = c_ithread_create (perl_threads->head->interp);
1265 pthread_mutex_unlock (&perl_threads->mutex);
1270 log_debug ("perl_init: c_ithread: interp = %p (active threads: %i)",
1271 aTHX, perl_threads->number_of_threads);
1272 return pplugin_call_all (aTHX_ PLUGIN_INIT);
1273 } /* static int perl_init (void) */
1275 static int perl_read (void)
1279 if (NULL == perl_threads)
1283 c_ithread_t *t = NULL;
1285 pthread_mutex_lock (&perl_threads->mutex);
1286 t = c_ithread_create (perl_threads->head->interp);
1287 pthread_mutex_unlock (&perl_threads->mutex);
1292 log_debug ("perl_read: c_ithread: interp = %p (active threads: %i)",
1293 aTHX, perl_threads->number_of_threads);
1294 return pplugin_call_all (aTHX_ PLUGIN_READ);
1295 } /* static int perl_read (void) */
1297 static int perl_write (const data_set_t *ds, const value_list_t *vl)
1301 if (NULL == perl_threads)
1305 c_ithread_t *t = NULL;
1307 pthread_mutex_lock (&perl_threads->mutex);
1308 t = c_ithread_create (perl_threads->head->interp);
1309 pthread_mutex_unlock (&perl_threads->mutex);
1314 log_debug ("perl_write: c_ithread: interp = %p (active threads: %i)",
1315 aTHX, perl_threads->number_of_threads);
1316 return pplugin_call_all (aTHX_ PLUGIN_WRITE, ds, vl);
1317 } /* static int perl_write (const data_set_t *, const value_list_t *) */
1319 static void perl_log (int level, const char *msg)
1323 if (NULL == perl_threads)
1327 c_ithread_t *t = NULL;
1329 pthread_mutex_lock (&perl_threads->mutex);
1330 t = c_ithread_create (perl_threads->head->interp);
1331 pthread_mutex_unlock (&perl_threads->mutex);
1336 pplugin_call_all (aTHX_ PLUGIN_LOG, level, msg);
1338 } /* static void perl_log (int, const char *) */
1340 static int perl_notify (const notification_t *notif)
1344 if (NULL == perl_threads)
1348 c_ithread_t *t = NULL;
1350 pthread_mutex_lock (&perl_threads->mutex);
1351 t = c_ithread_create (perl_threads->head->interp);
1352 pthread_mutex_unlock (&perl_threads->mutex);
1356 return pplugin_call_all (aTHX_ PLUGIN_NOTIF, notif);
1357 } /* static int perl_notify (const notification_t *) */
1359 static int perl_flush (int timeout, const char *identifier)
1363 if (NULL == perl_threads)
1367 c_ithread_t *t = NULL;
1369 pthread_mutex_lock (&perl_threads->mutex);
1370 t = c_ithread_create (perl_threads->head->interp);
1371 pthread_mutex_unlock (&perl_threads->mutex);
1375 return pplugin_call_all (aTHX_ PLUGIN_FLUSH, timeout, identifier);
1376 } /* static int perl_flush (const int) */
1378 static int perl_shutdown (void)
1380 c_ithread_t *t = NULL;
1386 plugin_unregister_complex_config ("perl");
1388 if (NULL == perl_threads)
1392 c_ithread_t *t = NULL;
1394 pthread_mutex_lock (&perl_threads->mutex);
1395 t = c_ithread_create (perl_threads->head->interp);
1396 pthread_mutex_unlock (&perl_threads->mutex);
1401 log_debug ("perl_shutdown: c_ithread: interp = %p (active threads: %i)",
1402 aTHX, perl_threads->number_of_threads);
1404 plugin_unregister_log ("perl");
1405 plugin_unregister_notification ("perl");
1406 plugin_unregister_init ("perl");
1407 plugin_unregister_read ("perl");
1408 plugin_unregister_write ("perl");
1409 plugin_unregister_flush ("perl");
1411 ret = pplugin_call_all (aTHX_ PLUGIN_SHUTDOWN);
1413 pthread_mutex_lock (&perl_threads->mutex);
1414 t = perl_threads->tail;
1417 c_ithread_t *thr = t;
1419 /* the pointer has to be advanced before destroying
1420 * the thread as this will free the memory */
1423 c_ithread_destroy (thr);
1426 pthread_mutex_unlock (&perl_threads->mutex);
1427 pthread_mutex_destroy (&perl_threads->mutex);
1429 sfree (perl_threads);
1431 pthread_key_delete (perl_thr_key);
1435 plugin_unregister_shutdown ("perl");
1437 } /* static void perl_shutdown (void) */
1440 * Access functions for global variables.
1442 * These functions implement the "magic" used to access
1443 * the global variables from Perl.
1446 static int g_pv_get (pTHX_ SV *var, MAGIC *mg)
1448 char *pv = mg->mg_ptr;
1451 } /* static int g_pv_get (pTHX_ SV *, MAGIC *) */
1453 static int g_pv_set (pTHX_ SV *var, MAGIC *mg)
1455 char *pv = mg->mg_ptr;
1456 sstrncpy (pv, SvPV_nolen (var), DATA_MAX_NAME_LEN);
1458 } /* static int g_pv_set (pTHX_ SV *, MAGIC *) */
1460 static int g_iv_get (pTHX_ SV *var, MAGIC *mg)
1462 int *iv = (int *)mg->mg_ptr;
1463 sv_setiv (var, *iv);
1465 } /* static int g_iv_get (pTHX_ SV *, MAGIC *) */
1467 static int g_iv_set (pTHX_ SV *var, MAGIC *mg)
1469 int *iv = (int *)mg->mg_ptr;
1470 *iv = (int)SvIV (var);
1472 } /* static int g_iv_set (pTHX_ SV *, MAGIC *) */
1474 static MGVTBL g_pv_vtbl = { g_pv_get, g_pv_set, NULL, NULL, NULL, NULL, NULL };
1475 static MGVTBL g_iv_vtbl = { g_iv_get, g_iv_set, NULL, NULL, NULL, NULL, NULL };
1477 /* bootstrap the Collectd module */
1478 static void xs_init (pTHX)
1482 char *file = __FILE__;
1488 /* enable usage of Perl modules using shared libraries */
1489 newXS ("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
1492 for (i = 0; NULL != api[i].f; ++i)
1493 newXS (api[i].name, api[i].f, file);
1495 stash = gv_stashpv ("Collectd", 1);
1497 /* export "constants" */
1498 for (i = 0; '\0' != constants[i].name[0]; ++i)
1499 newCONSTSUB (stash, constants[i].name, newSViv (constants[i].value));
1501 /* export global variables
1502 * by adding "magic" to the SV's representing the globale variables
1503 * perl is able to automagically call the get/set function when
1504 * accessing any such variable (this is basically the same as using
1506 /* global strings */
1507 for (i = 0; '\0' != g_strings[i].name[0]; ++i) {
1508 tmp = get_sv (g_strings[i].name, 1);
1509 sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_pv_vtbl,
1510 g_strings[i].var, 0);
1513 /* global integers */
1514 for (i = 0; '\0' != g_integers[i].name[0]; ++i) {
1515 tmp = get_sv (g_integers[i].name, 1);
1516 sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_iv_vtbl,
1517 (char *)g_integers[i].var, 0);
1520 } /* static void xs_init (pTHX) */
1522 /* Initialize the global Perl interpreter. */
1523 static int init_pi (int argc, char **argv)
1527 if (NULL != perl_threads)
1530 log_info ("Initializing Perl interpreter...");
1535 for (i = 0; i < argc; ++i)
1536 log_debug ("argv[%i] = \"%s\"", i, argv[i]);
1538 #endif /* COLLECT_DEBUG */
1540 if (0 != pthread_key_create (&perl_thr_key, c_ithread_destructor)) {
1541 log_err ("init_pi: pthread_key_create failed");
1543 /* this must not happen - cowardly giving up if it does */
1548 /* On FreeBSD, PERL_SYS_INIT3 expands to some expression which
1549 * triggers a "value computed is not used" warning by gcc. */
1552 PERL_SYS_INIT3 (&argc, &argv, &environ);
1554 perl_threads = (c_ithread_list_t *)smalloc (sizeof (c_ithread_list_t));
1555 memset (perl_threads, 0, sizeof (c_ithread_list_t));
1557 pthread_mutex_init (&perl_threads->mutex, NULL);
1558 /* locking the mutex should not be necessary at this point
1559 * but let's just do it for the sake of completeness */
1560 pthread_mutex_lock (&perl_threads->mutex);
1562 perl_threads->head = c_ithread_create (NULL);
1563 perl_threads->tail = perl_threads->head;
1565 if (NULL == (perl_threads->head->interp = perl_alloc ())) {
1566 log_err ("init_pi: Not enough memory.");
1570 aTHX = perl_threads->head->interp;
1571 pthread_mutex_unlock (&perl_threads->mutex);
1573 perl_construct (aTHX);
1575 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
1577 if (0 != perl_parse (aTHX_ xs_init, argc, argv, NULL)) {
1578 SV *err = get_sv ("@", 1);
1579 log_err ("init_pi: Unable to bootstrap Collectd: %s",
1582 perl_destruct (perl_threads->head->interp);
1583 perl_free (perl_threads->head->interp);
1584 sfree (perl_threads);
1586 pthread_key_delete (perl_thr_key);
1590 /* Set $0 to "collectd" because perl_parse() has to set it to "-e". */
1591 sv_setpv (get_sv ("0", 0), "collectd");
1595 plugin_register_log ("perl", perl_log);
1596 plugin_register_notification ("perl", perl_notify);
1597 plugin_register_init ("perl", perl_init);
1599 plugin_register_read ("perl", perl_read);
1601 plugin_register_write ("perl", perl_write);
1602 plugin_register_flush ("perl", perl_flush);
1603 plugin_register_shutdown ("perl", perl_shutdown);
1605 } /* static int init_pi (const char **, const int) */
1608 * LoadPlugin "<Plugin>"
1610 static int perl_config_loadplugin (pTHX_ oconfig_item_t *ci)
1612 char module_name[DATA_MAX_NAME_LEN];
1616 if ((0 != ci->children_num) || (1 != ci->values_num)
1617 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1618 log_err ("LoadPlugin expects a single string argument.");
1622 value = ci->values[0].value.string;
1624 if (NULL == get_module_name (module_name, sizeof (module_name), value)) {
1625 log_err ("Invalid module name %s", value);
1629 if (0 != init_pi (perl_argc, perl_argv))
1632 assert (NULL != perl_threads);
1633 assert (NULL != perl_threads->head);
1635 aTHX = perl_threads->head->interp;
1637 log_debug ("perl_config: loading perl plugin \"%s\"", value);
1638 load_module (PERL_LOADMOD_NOIMPORT,
1639 newSVpv (module_name, strlen (module_name)), Nullsv);
1641 } /* static int perl_config_loadplugin (oconfig_item_it *) */
1646 static int perl_config_basename (pTHX_ oconfig_item_t *ci)
1650 if ((0 != ci->children_num) || (1 != ci->values_num)
1651 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1652 log_err ("BaseName expects a single string argument.");
1656 value = ci->values[0].value.string;
1658 log_debug ("perl_config: Setting plugin basename to \"%s\"", value);
1659 sstrncpy (base_name, value, sizeof (base_name));
1661 } /* static int perl_config_basename (oconfig_item_it *) */
1664 * EnableDebugger "<Package>"|""
1666 static int perl_config_enabledebugger (pTHX_ oconfig_item_t *ci)
1670 if ((0 != ci->children_num) || (1 != ci->values_num)
1671 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1672 log_err ("EnableDebugger expects a single string argument.");
1676 if (NULL != perl_threads) {
1677 log_warn ("EnableDebugger has no effects if used after LoadPlugin.");
1681 value = ci->values[0].value.string;
1683 perl_argv = (char **)realloc (perl_argv,
1684 (++perl_argc + 1) * sizeof (char *));
1686 if (NULL == perl_argv) {
1687 log_err ("perl_config: Not enough memory.");
1691 if ('\0' == value[0]) {
1692 perl_argv[perl_argc - 1] = "-d";
1695 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 4);
1696 sstrncpy (perl_argv[perl_argc - 1], "-d:", 4);
1697 sstrncpy (perl_argv[perl_argc - 1] + 3, value, strlen (value) + 1);
1700 perl_argv[perl_argc] = NULL;
1702 } /* static int perl_config_enabledebugger (oconfig_item_it *) */
1705 * IncludeDir "<Dir>"
1707 static int perl_config_includedir (pTHX_ oconfig_item_t *ci)
1711 if ((0 != ci->children_num) || (1 != ci->values_num)
1712 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1713 log_err ("IncludeDir expects a single string argument.");
1717 value = ci->values[0].value.string;
1720 perl_argv = (char **)realloc (perl_argv,
1721 (++perl_argc + 1) * sizeof (char *));
1723 if (NULL == perl_argv) {
1724 log_err ("perl_config: Not enough memory.");
1728 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 3);
1729 sstrncpy(perl_argv[perl_argc - 1], "-I", 3);
1730 sstrncpy(perl_argv[perl_argc - 1] + 2, value, strlen (value) + 1);
1732 perl_argv[perl_argc] = NULL;
1735 /* prepend the directory to @INC */
1736 av_unshift (GvAVn (PL_incgv), 1);
1737 av_store (GvAVn (PL_incgv), 0, newSVpv (value, strlen (value)));
1740 } /* static int perl_config_includedir (oconfig_item_it *) */
1745 static int perl_config_plugin (pTHX_ oconfig_item_t *ci)
1755 if ((1 != ci->values_num) || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1756 log_err ("LoadPlugin expects a single string argument.");
1760 plugin = ci->values[0].value.string;
1763 if (0 != oconfig_item2hv (aTHX_ ci, config)) {
1767 log_err ("Unable to convert configuration to a Perl hash value.");
1776 XPUSHs (sv_2mortal (newSVpv (plugin, 0)));
1777 XPUSHs (sv_2mortal (newRV_noinc ((SV *)config)));
1781 retvals = call_pv ("Collectd::_plugin_dispatch_config", G_SCALAR);
1796 } /* static int perl_config_plugin (oconfig_item_it *) */
1798 static int perl_config (oconfig_item_t *ci)
1805 for (i = 0; i < ci->children_num; ++i) {
1806 oconfig_item_t *c = ci->children + i;
1807 int current_status = 0;
1809 if (NULL != perl_threads)
1810 aTHX = PERL_GET_CONTEXT;
1812 if (0 == strcasecmp (c->key, "LoadPlugin"))
1813 current_status = perl_config_loadplugin (aTHX_ c);
1814 else if (0 == strcasecmp (c->key, "BaseName"))
1815 current_status = perl_config_basename (aTHX_ c);
1816 else if (0 == strcasecmp (c->key, "EnableDebugger"))
1817 current_status = perl_config_enabledebugger (aTHX_ c);
1818 else if (0 == strcasecmp (c->key, "IncludeDir"))
1819 current_status = perl_config_includedir (aTHX_ c);
1820 else if (0 == strcasecmp (c->key, "Plugin"))
1821 current_status = perl_config_plugin (aTHX_ c);
1824 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1828 /* fatal error - it's up to perl_config_* to clean up */
1829 if (0 > current_status) {
1830 log_err ("Configuration failed with a fatal error - "
1831 "plugin disabled!");
1832 return current_status;
1835 status += current_status;
1838 } /* static int perl_config (oconfig_item_t *) */
1840 void module_register (void)
1843 perl_argv = (char **)smalloc ((perl_argc + 1) * sizeof (char *));
1845 /* default options for the Perl interpreter */
1847 perl_argv[1] = "-MCollectd";
1848 perl_argv[2] = "-e";
1850 perl_argv[4] = NULL;
1852 plugin_register_complex_config ("perl", perl_config);
1854 } /* void module_register (void) */
1856 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */