1 /**
2 * collectd - src/perl.c
3 * Copyright (C) 2007 Sebastian Harl
4 *
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.
8 *
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.
13 *
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
17 *
18 * Author:
19 * Sebastian Harl <sh at tokkee.org>
20 **/
22 /*
23 * This plugin embeds a Perl interpreter into collectd and provides an
24 * interface for collectd plugins written in perl.
25 */
27 #include "collectd.h"
29 #include "configfile.h"
31 #include <EXTERN.h>
32 #include <perl.h>
34 #include <XSUB.h>
36 /* Some versions of Perl define their own version of DEBUG... :-/ */
37 #ifdef DEBUG
38 # undef DEBUG
39 #endif /* DEBUG */
41 /* ... while we want the definition found in plugin.h. */
42 #include "plugin.h"
43 #include "common.h"
45 #define PLUGIN_INIT 0
46 #define PLUGIN_READ 1
47 #define PLUGIN_WRITE 2
48 #define PLUGIN_SHUTDOWN 3
49 #define PLUGIN_LOG 4
51 #define PLUGIN_TYPES 5
53 #define PLUGIN_DATASET 255
55 #define log_debug(...) DEBUG ("perl: " __VA_ARGS__)
56 #define log_info(...) INFO ("perl: " __VA_ARGS__)
57 #define log_warn(...) WARNING ("perl: " __VA_ARGS__)
58 #define log_err(...) ERROR ("perl: " __VA_ARGS__)
61 /* this is defined in DynaLoader.a */
62 void boot_DynaLoader (PerlInterpreter *, CV *);
64 static XS (Collectd_plugin_register);
65 static XS (Collectd_plugin_unregister);
66 static XS (Collectd_plugin_dispatch_values);
67 static XS (Collectd_plugin_log);
70 /*
71 * private data types
72 */
74 typedef struct {
75 int len;
76 int *values;
77 } ds_types_t;
79 typedef struct {
80 int wait_time;
81 int wait_left;
83 SV *sub;
84 } pplugin_t;
87 /*
88 * private variables
89 */
91 /* valid configuration file keys */
92 static const char *config_keys[] =
93 {
94 "LoadPlugin",
95 "BaseName",
96 "IncludeDir"
97 };
98 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
100 static PerlInterpreter *perl = NULL;
102 static int perl_argc = 0;
103 static char **perl_argv = NULL;
105 static char base_name[DATA_MAX_NAME_LEN] = "";
107 static char *plugin_types[] = { "init", "read", "write", "shutdown" };
108 static HV *plugins[PLUGIN_TYPES];
109 static HV *data_sets;
111 static struct {
112 char name[64];
113 XS ((*f));
114 } api[] =
115 {
116 { "Collectd::plugin_register", Collectd_plugin_register },
117 { "Collectd::plugin_unregister", Collectd_plugin_unregister },
118 { "Collectd::plugin_dispatch_values", Collectd_plugin_dispatch_values },
119 { "Collectd::plugin_log", Collectd_plugin_log },
120 { "", NULL }
121 };
124 /*
125 * Helper functions for data type conversion.
126 */
128 /*
129 * data source:
130 * [
131 * {
132 * name => $ds_name,
133 * type => $ds_type,
134 * min => $ds_min,
135 * max => $ds_max
136 * },
137 * ...
138 * ]
139 */
140 static int hv2data_source (HV *hash, data_source_t *ds)
141 {
142 SV **tmp = NULL;
144 if ((NULL == hash) || (NULL == ds))
145 return -1;
147 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "name", 4, 0))) {
148 strncpy (ds->name, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
149 ds->name[DATA_MAX_NAME_LEN - 1] = '\0';
150 }
151 else {
152 log_err ("hv2data_source: No DS name given.");
153 return -1;
154 }
156 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "type", 4, 0))) {
157 ds->type = SvIV (*tmp);
159 if ((DS_TYPE_COUNTER != ds->type) && (DS_TYPE_GAUGE != ds->type)) {
160 log_err ("hv2data_source: Invalid DS type.");
161 return -1;
162 }
163 }
164 else {
165 ds->type = DS_TYPE_COUNTER;
166 }
168 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "min", 3, 0)))
169 ds->min = SvNV (*tmp);
170 else
171 ds->min = NAN;
173 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "max", 3, 0)))
174 ds->max = SvNV (*tmp);
175 else
176 ds->max = NAN;
177 return 0;
178 } /* static data_source_t *hv2data_source (HV *) */
180 static int av2value (char *name, AV *array, value_t *value, int len)
181 {
182 SV **tmp = NULL;
184 ds_types_t *ds = NULL;
186 int i = 0;
188 if ((NULL == name) || (NULL == array) || (NULL == value))
189 return -1;
191 if (Perl_av_len (perl, array) < len - 1)
192 len = Perl_av_len (perl, array) + 1;
194 if (0 >= len)
195 return -1;
197 tmp = Perl_hv_fetch (perl, data_sets, name, strlen (name), 0);
198 if (NULL == tmp) {
199 log_err ("av2value: No dataset for \"%s\".", name);
200 return -1;
201 }
202 ds = (ds_types_t *)SvIV ((SV *)SvRV (*tmp));
204 if (ds->len < len) {
205 log_warn ("av2value: Value length exceeds data set length.");
206 len = ds->len;
207 }
209 for (i = 0; i < len; ++i) {
210 SV **tmp = Perl_av_fetch (perl, array, i, 0);
212 if (NULL != tmp) {
213 if (DS_TYPE_COUNTER == ds->values[i])
214 value[i].counter = SvIV (*tmp);
215 else
216 value[i].gauge = SvNV (*tmp);
217 }
218 else {
219 return -1;
220 }
221 }
222 return len;
223 } /* static int av2value (char *, AV *, value_t *, int) */
225 static int data_set2av (data_set_t *ds, AV *array)
226 {
227 int i = 0;
229 if ((NULL == ds) || (NULL == array))
230 return -1;
232 Perl_av_extend (perl, array, ds->ds_num);
234 for (i = 0; i < ds->ds_num; ++i) {
235 HV *source = Perl_newHV (perl);
237 if (NULL == Perl_hv_store (perl, source, "name", 4,
238 Perl_newSVpv (perl, ds->ds[i].name, 0), 0))
239 return -1;
241 if (NULL == Perl_hv_store (perl, source, "type", 4,
242 Perl_newSViv (perl, ds->ds[i].type), 0))
243 return -1;
245 if (! isnan (ds->ds[i].min))
246 if (NULL == Perl_hv_store (perl, source, "min", 3,
247 Perl_newSVnv (perl, ds->ds[i].min), 0))
248 return -1;
250 if (! isnan (ds->ds[i].max))
251 if (NULL == Perl_hv_store (perl, source, "max", 3,
252 Perl_newSVnv (perl, ds->ds[i].max), 0))
253 return -1;
255 if (NULL == Perl_av_store (perl, array, i,
256 Perl_newRV_noinc (perl, (SV *)source)))
257 return -1;
258 }
259 return 0;
260 } /* static int data_set2av (data_set_t *, AV *) */
262 static int value_list2hv (value_list_t *vl, data_set_t *ds, HV *hash)
263 {
264 AV *values = NULL;
266 int i = 0;
267 int len = 0;
269 if ((NULL == vl) || (NULL == ds) || (NULL == hash))
270 return -1;
272 len = vl->values_len;
274 if (ds->ds_num < len) {
275 log_warn ("value2av: Value length exceeds data set length.");
276 len = ds->ds_num;
277 }
279 values = Perl_newAV (perl);
280 Perl_av_extend (perl, values, len - 1);
282 for (i = 0; i < len; ++i) {
283 SV *val = NULL;
285 if (DS_TYPE_COUNTER == ds->ds[i].type)
286 val = Perl_newSViv (perl, vl->values[i].counter);
287 else
288 val = Perl_newSVnv (perl, vl->values[i].gauge);
290 if (NULL == Perl_av_store (perl, values, i, val)) {
291 Perl_av_undef (perl, values);
292 return -1;
293 }
294 }
296 if (NULL == Perl_hv_store (perl, hash, "values", 6,
297 Perl_newRV_noinc (perl, (SV *)values), 0))
298 return -1;
300 if (0 != vl->time)
301 if (NULL == Perl_hv_store (perl, hash, "time", 4,
302 Perl_newSViv (perl, vl->time), 0))
303 return -1;
305 if ('\0' != vl->host[0])
306 if (NULL == Perl_hv_store (perl, hash, "host", 4,
307 Perl_newSVpv (perl, vl->host, 0), 0))
308 return -1;
310 if ('\0' != vl->plugin[0])
311 if (NULL == Perl_hv_store (perl, hash, "plugin", 6,
312 Perl_newSVpv (perl, vl->plugin, 0), 0))
313 return -1;
315 if ('\0' != vl->plugin_instance[0])
316 if (NULL == Perl_hv_store (perl, hash, "plugin_instance", 15,
317 Perl_newSVpv (perl, vl->plugin_instance, 0), 0))
318 return -1;
320 if ('\0' != vl->type_instance[0])
321 if (NULL == Perl_hv_store (perl, hash, "type_instance", 13,
322 Perl_newSVpv (perl, vl->type_instance, 0), 0))
323 return -1;
324 return 0;
325 } /* static int value2av (value_list_t *, data_set_t *, HV *) */
328 /*
329 * Internal functions.
330 */
332 static char *get_module_name (char *buf, size_t buf_len, const char *module) {
333 int status = 0;
334 if (base_name[0] == '\0')
335 status = snprintf (buf, buf_len, "%s", module);
336 else
337 status = snprintf (buf, buf_len, "%s::%s", base_name, module);
338 if ((status < 0) || (status >= buf_len))
339 return (NULL);
340 buf[buf_len - 1] = '\0';
341 return (buf);
342 } /* char *get_module_name */
344 /*
345 * Add a new plugin with the given name.
346 */
347 static int pplugin_register (int type, const char *name, SV *sub)
348 {
349 pplugin_t *p = NULL;
351 if ((type < 0) || (type >= PLUGIN_TYPES))
352 return -1;
354 if (NULL == name)
355 return -1;
357 p = (pplugin_t *)smalloc (sizeof (pplugin_t));
358 /* this happens during parsing of config file,
359 * thus interval_g is not set correctly */
360 p->wait_time = 10;
361 p->wait_left = 0;
362 p->sub = Perl_newSVsv (perl, sub);
364 if (NULL == Perl_hv_store (perl, plugins[type], name, strlen (name),
365 Perl_sv_setref_pv (perl, Perl_newSV (perl, 0), 0, p), 0)) {
366 log_debug ("pplugin_register: Failed to add plugin \"%s\" (\"%s\")",
367 name, SvPV_nolen (sub));
368 Perl_sv_free (perl, p->sub);
369 sfree (p);
370 return -1;
371 }
372 return 0;
373 } /* static int pplugin_register (int, char *, SV *) */
375 /*
376 * Removes the plugin with the given name and frees any ressources.
377 */
378 static int pplugin_unregister (int type, char *name)
379 {
380 SV *tmp = NULL;
382 if ((type < 0) || (type >= PLUGIN_TYPES))
383 return -1;
385 if (NULL == name)
386 return -1;
388 /* freeing the allocated memory of the element itself (pplugin_t *) causes
389 * a segfault during perl_destruct () thus I assume perl somehow takes
390 * care of this... */
392 tmp = Perl_hv_delete (perl, plugins[type], name, strlen (name), 0);
393 if (NULL != tmp) {
394 pplugin_t *p = (pplugin_t *)SvIV ((SV *)SvRV (tmp));
395 Perl_sv_free (perl, p->sub);
396 }
397 return 0;
398 } /* static int pplugin_unregister (char *) */
400 /*
401 * Add a plugin's data set definition.
402 */
403 static int pplugin_register_data_set (char *name, AV *dataset)
404 {
405 int len = -1;
406 int i = 0;
408 data_source_t *ds = NULL;
409 data_set_t *set = NULL;
411 ds_types_t *types = NULL;
413 if ((NULL == name) || (NULL == dataset))
414 return -1;
416 len = Perl_av_len (perl, dataset);
418 if (-1 == len)
419 return -1;
421 ds = (data_source_t *)smalloc ((len + 1) * sizeof (data_source_t));
422 set = (data_set_t *)smalloc (sizeof (data_set_t));
424 types = (ds_types_t *)smalloc (sizeof (ds_types_t));
425 types->len = len + 1;
426 types->values = (int *)smalloc ((types->len) * sizeof (int));
428 for (i = 0; i <= len; ++i) {
429 SV **elem = Perl_av_fetch (perl, dataset, i, 0);
431 if (NULL == elem)
432 return -1;
434 if (! (SvROK (*elem) && (SVt_PVHV == SvTYPE (SvRV (*elem))))) {
435 log_err ("pplugin_register_data_set: Invalid data source.");
436 return -1;
437 }
439 if (-1 == hv2data_source ((HV *)SvRV (*elem), &ds[i]))
440 return -1;
442 types->values[i] = ds[i].type;
443 log_debug ("pplugin_register_data_set: "
444 "DS.name = \"%s\", DS.type = %i, DS.min = %f, DS.max = %f",
445 ds[i].name, ds[i].type, ds[i].min, ds[i].max);
446 }
448 if (NULL == Perl_hv_store (perl, data_sets, name, strlen (name),
449 Perl_sv_setref_pv (perl, Perl_newSV (perl, 0), 0, types), 0))
450 return -1;
452 strncpy (set->type, name, DATA_MAX_NAME_LEN);
453 set->type[DATA_MAX_NAME_LEN - 1] = '\0';
455 set->ds_num = len + 1;
456 set->ds = ds;
457 return plugin_register_data_set (set);
458 } /* static int pplugin_register_data_set (char *, SV *) */
460 /*
461 * Remove a plugin's data set definition.
462 */
463 static int pplugin_unregister_data_set (char *name)
464 {
465 SV *tmp = NULL;
467 if (NULL == name)
468 return 0;
470 /* freeing the allocated memory of the element itself (ds_types_t *)
471 * causes a segfault during perl_destruct () thus I assume perl somehow
472 * takes care of this... */
474 tmp = Perl_hv_delete (perl, data_sets, name, strlen (name), 0);
475 if (NULL != tmp) {
476 ds_types_t *ds = (ds_types_t *)SvIV ((SV *)SvRV (tmp));
477 sfree (ds->values);
478 }
479 return plugin_unregister_data_set (name);
480 } /* static int pplugin_unregister_data_set (char *) */
482 /*
483 * Submit the values to the write functions.
484 *
485 * value list:
486 * {
487 * values => [ @values ],
488 * time => $time,
489 * host => $host,
490 * plugin => $plugin,
491 * plugin_instance => $pinstance,
492 * type_instance => $tinstance,
493 * }
494 */
495 static int pplugin_dispatch_values (char *name, HV *values)
496 {
497 value_list_t list = VALUE_LIST_INIT;
498 value_t *val = NULL;
500 SV **tmp = NULL;
502 int ret = 0;
504 if ((NULL == name) || (NULL == values))
505 return -1;
507 if ((NULL == (tmp = Perl_hv_fetch (perl, values, "values", 6, 0)))
508 || (! (SvROK (*tmp) && (SVt_PVAV == SvTYPE (SvRV (*tmp)))))) {
509 log_err ("pplugin_dispatch_values: No valid values given.");
510 return -1;
511 }
513 {
514 AV *array = (AV *)SvRV (*tmp);
515 int len = Perl_av_len (perl, array) + 1;
517 val = (value_t *)smalloc (len * sizeof (value_t));
519 list.values_len = av2value (name, (AV *)SvRV (*tmp), val, len);
520 list.values = val;
522 if (-1 == list.values_len) {
523 sfree (val);
524 return -1;
525 }
526 }
528 if (NULL != (tmp = Perl_hv_fetch (perl, values, "time", 4, 0))) {
529 list.time = (time_t)SvIV (*tmp);
530 }
531 else {
532 list.time = time (NULL);
533 }
535 if (NULL != (tmp = Perl_hv_fetch (perl, values, "host", 4, 0))) {
536 strncpy (list.host, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
537 list.host[DATA_MAX_NAME_LEN - 1] = '\0';
538 }
539 else {
540 strcpy (list.host, hostname_g);
541 }
543 if (NULL != (tmp = Perl_hv_fetch (perl, values, "plugin", 6, 0))) {
544 strncpy (list.plugin, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
545 list.plugin[DATA_MAX_NAME_LEN - 1] = '\0';
546 }
548 if (NULL != (tmp = Perl_hv_fetch (perl, values,
549 "plugin_instance", 15, 0))) {
550 strncpy (list.plugin_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
551 list.plugin_instance[DATA_MAX_NAME_LEN - 1] = '\0';
552 }
554 if (NULL != (tmp = Perl_hv_fetch (perl, values, "type_instance", 13, 0))) {
555 strncpy (list.type_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
556 list.type_instance[DATA_MAX_NAME_LEN - 1] = '\0';
557 }
559 ret = plugin_dispatch_values (name, &list);
561 sfree (val);
562 return ret;
563 } /* static int pplugin_dispatch_values (char *, HV *) */
565 /*
566 * Call a plugin's working function.
567 */
568 static int pplugin_call (int type, char *name, SV *sub, va_list ap)
569 {
570 int retvals = 0;
571 I32 xflags = G_NOARGS;
573 int ret = 0;
575 dSP;
577 if ((type < 0) || (type >= PLUGIN_TYPES))
578 return -1;
580 ENTER;
581 SAVETMPS;
583 PUSHMARK (SP);
585 if (PLUGIN_WRITE == type) {
586 /*
587 * $_[0] = $plugin_type;
588 *
589 * $_[1] =
590 * [
591 * {
592 * name => $ds_name,
593 * type => $ds_type,
594 * min => $ds_min,
595 * max => $ds_max
596 * },
597 * ...
598 * ];
599 *
600 * $_[2] =
601 * {
602 * values => [ $v1, ... ],
603 * time => $time,
604 * host => $hostname,
605 * plugin => $plugin,
606 * plugin_instance => $instance,
607 * type_instance => $type_instance
608 * };
609 */
610 data_set_t *ds;
611 value_list_t *vl;
613 AV *pds = Perl_newAV (perl);
614 HV *pvl = Perl_newHV (perl);
616 ds = va_arg (ap, data_set_t *);
617 vl = va_arg (ap, value_list_t *);
619 if (-1 == data_set2av (ds, pds))
620 return -1;
622 if (-1 == value_list2hv (vl, ds, pvl))
623 return -1;
625 XPUSHs (sv_2mortal (Perl_newSVpv (perl, ds->type, 0)));
626 XPUSHs (sv_2mortal (Perl_newRV_noinc (perl, (SV *)pds)));
627 XPUSHs (sv_2mortal (Perl_newRV_noinc (perl, (SV *)pvl)));
629 xflags = 0;
630 }
631 else if (PLUGIN_LOG == type) {
632 /*
633 * $_[0] = $level;
634 *
635 * $_[1] = $message;
636 */
637 XPUSHs (sv_2mortal (Perl_newSViv (perl, va_arg (ap, int))));
638 XPUSHs (sv_2mortal (Perl_newSVpv (perl, va_arg (ap, char *), 0)));
640 xflags = 0;
641 }
643 PUTBACK;
645 /* prevent an endless loop */
646 if (PLUGIN_LOG != type)
647 log_debug ("pplugin_call: executing %s::%s->%s()",
648 base_name, name, plugin_types[type]);
650 retvals = Perl_call_sv (perl, sub, G_SCALAR | xflags);
652 SPAGAIN;
653 if (1 > retvals) {
654 if (PLUGIN_LOG != type)
655 log_warn ("pplugin_call: "
656 "%s::%s->%s() returned void - assuming true",
657 base_name, name, plugin_types[type]);
658 }
659 else {
660 SV *tmp = POPs;
661 if (! SvTRUE (tmp))
662 ret = -1;
663 }
665 PUTBACK;
666 FREETMPS;
667 LEAVE;
668 return ret;
669 } /* static int pplugin_call (int, char *, SV *, va_list) */
671 /*
672 * Call all working functions of the given type.
673 */
674 static int pplugin_call_all (int type, ...)
675 {
676 SV *tmp = NULL;
678 char *plugin;
679 I32 len;
681 if ((type < 0) || (type >= PLUGIN_TYPES))
682 return -1;
684 if (0 == Perl_hv_iterinit (perl, plugins[type]))
685 return 0;
687 while (NULL != (tmp = Perl_hv_iternextsv (perl, plugins[type],
688 &plugin, &len))) {
689 pplugin_t *p;
690 va_list ap;
692 int status;
694 va_start (ap, type);
696 p = (pplugin_t *)SvIV ((SV *)SvRV (tmp));
698 if (p->wait_left > 0)
699 p->wait_left -= interval_g;
701 if (p->wait_left > 0)
702 continue;
704 if (0 == (status = pplugin_call (type, plugin, p->sub, ap))) {
705 p->wait_left = 0;
706 p->wait_time = interval_g;
707 }
708 else if (PLUGIN_READ == type) {
709 p->wait_left = p->wait_time;
710 p->wait_time <<= 1;
712 if (p->wait_time > 86400)
713 p->wait_time = 86400;
715 log_warn ("%s->read() failed. Will suspend it for %i seconds.",
716 plugin, p->wait_left);
717 }
718 else if (PLUGIN_INIT == type) {
719 int i = 0;
721 log_err ("%s->init() failed. Plugin will be disabled.",
722 plugin, status);
724 for (i = 0; i < PLUGIN_TYPES; ++i)
725 pplugin_unregister (i, plugin);
726 }
727 else if (PLUGIN_LOG != type) {
728 log_warn ("%s->%s() failed with status %i.",
729 plugin, plugin_types[type], status);
730 }
732 va_end (ap);
733 }
734 return 0;
735 } /* static int pplugin_call_all (int, ...) */
738 /*
739 * Exported Perl API.
740 */
742 /*
743 * Collectd::plugin_register (type, name, data).
744 *
745 * type:
746 * init, read, write, shutdown, data set
747 *
748 * name:
749 * name of the plugin
750 *
751 * data:
752 * reference to the plugin's subroutine that does the work or the data set
753 * definition
754 */
755 static XS (Collectd_plugin_register)
756 {
757 int type = 0;
758 SV *data = NULL;
760 int ret = 0;
762 dXSARGS;
764 if (3 != items) {
765 log_err ("Usage: Collectd::plugin_register(type, name, data)");
766 XSRETURN_EMPTY;
767 }
769 log_debug ("Collectd::plugin_register: "
770 "type = \"%i\", name = \"%s\", \"%s\"",
771 (int)SvIV (ST (0)), SvPV_nolen (ST (1)), SvPV_nolen (ST (2)));
773 type = (int)SvIV (ST (0));
774 data = ST (2);
776 if ((type >= 0) && (type < PLUGIN_TYPES)
777 && SvROK (data) && (SVt_PVCV == SvTYPE (SvRV (data)))) {
778 ret = pplugin_register (type, SvPV_nolen (ST (1)), data);
779 }
780 else if ((type == PLUGIN_DATASET)
781 && SvROK (data) && (SVt_PVAV == SvTYPE (SvRV (data)))) {
782 ret = pplugin_register_data_set (SvPV_nolen (ST (1)),
783 (AV *)SvRV (data));
784 }
785 else {
786 log_err ("Collectd::plugin_register: Invalid data.");
787 XSRETURN_EMPTY;
788 }
790 if (0 == ret)
791 XSRETURN_YES;
792 else
793 XSRETURN_EMPTY;
794 } /* static XS (Collectd_plugin_register) */
796 /*
797 * Collectd::plugin_unregister (type, name).
798 *
799 * type:
800 * init, read, write, shutdown, data set
801 *
802 * name:
803 * name of the plugin
804 */
805 static XS (Collectd_plugin_unregister)
806 {
807 int type = 0;
808 int ret = 0;
810 dXSARGS;
812 if (2 != items) {
813 log_err ("Usage: Collectd::plugin_unregister(type, name)");
814 XSRETURN_EMPTY;
815 }
817 log_debug ("Collectd::plugin_unregister: type = \"%i\", name = \"%s\"",
818 (int)SvIV (ST (0)), SvPV_nolen (ST (1)));
820 type = (int)SvIV (ST (0));
822 if ((type >= 0) && (type < PLUGIN_TYPES)) {
823 ret = pplugin_unregister (type, SvPV_nolen (ST (1)));
824 }
825 else if (type == PLUGIN_DATASET) {
826 ret = pplugin_unregister_data_set (SvPV_nolen (ST (1)));
827 }
828 else {
829 log_err ("Collectd::plugin_unregister: Invalid type.");
830 XSRETURN_EMPTY;
831 }
833 if (0 == ret)
834 XSRETURN_YES;
835 else
836 XSRETURN_EMPTY;
837 } /* static XS (Collectd_plugin_unregister) */
839 /*
840 * Collectd::plugin_dispatch_values (name, values).
841 *
842 * name:
843 * name of the plugin
844 *
845 * values:
846 * value list to submit
847 */
848 static XS (Collectd_plugin_dispatch_values)
849 {
850 SV *values = NULL;
852 int ret = 0;
854 dXSARGS;
856 if (2 != items) {
857 log_err ("Usage: Collectd::plugin_dispatch_values(name, values)");
858 XSRETURN_EMPTY;
859 }
861 log_debug ("Collectd::plugin_dispatch_values: "
862 "name = \"%s\", values=\"%s\"",
863 SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
865 values = ST (1);
867 if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
868 log_err ("Collectd::plugin_dispatch_values: Invalid values.");
869 XSRETURN_EMPTY;
870 }
872 if ((NULL == ST (0)) || (NULL == values))
873 XSRETURN_EMPTY;
875 ret = pplugin_dispatch_values (SvPV_nolen (ST (0)), (HV *)SvRV (values));
877 if (0 == ret)
878 XSRETURN_YES;
879 else
880 XSRETURN_EMPTY;
881 } /* static XS (Collectd_plugin_dispatch_values) */
883 /*
884 * Collectd::plugin_log (level, message).
885 *
886 * level:
887 * log level (LOG_DEBUG, ... LOG_ERR)
888 *
889 * message:
890 * log message
891 */
892 static XS (Collectd_plugin_log)
893 {
894 dXSARGS;
896 if (2 != items) {
897 log_err ("Usage: Collectd::plugin_log(level, message)");
898 XSRETURN_EMPTY;
899 }
901 log_debug ("Collectd::plugin_log: level = %i, message = \"%s\"",
902 SvIV (ST (0)), SvPV_nolen (ST (1)));
903 plugin_log (SvIV (ST (0)), SvPV_nolen (ST (1)));
904 XSRETURN_YES;
905 } /* static XS (Collectd_plugin_log) */
907 /*
908 * Collectd::bootstrap ().
909 */
910 static XS (boot_Collectd)
911 {
912 HV *stash = NULL;
913 char *file = __FILE__;
915 struct {
916 char name[64];
917 SV *value;
918 } consts[] =
919 {
920 { "Collectd::TYPE_INIT", Perl_newSViv (perl, PLUGIN_INIT) },
921 { "Collectd::TYPE_READ", Perl_newSViv (perl, PLUGIN_READ) },
922 { "Collectd::TYPE_WRITE", Perl_newSViv (perl, PLUGIN_WRITE) },
923 { "Collectd::TYPE_SHUTDOWN", Perl_newSViv (perl, PLUGIN_SHUTDOWN) },
924 { "Collectd::TYPE_LOG", Perl_newSViv (perl, PLUGIN_LOG) },
925 { "Collectd::TYPE_DATASET", Perl_newSViv (perl, PLUGIN_DATASET) },
926 { "Collectd::DS_TYPE_COUNTER", Perl_newSViv (perl, DS_TYPE_COUNTER) },
927 { "Collectd::DS_TYPE_GAUGE", Perl_newSViv (perl, DS_TYPE_GAUGE) },
928 { "Collectd::LOG_ERR", Perl_newSViv (perl, LOG_ERR) },
929 { "Collectd::LOG_WARNING", Perl_newSViv (perl, LOG_WARNING) },
930 { "Collectd::LOG_NOTICE", Perl_newSViv (perl, LOG_NOTICE) },
931 { "Collectd::LOG_INFO", Perl_newSViv (perl, LOG_INFO) },
932 { "Collectd::LOG_DEBUG", Perl_newSViv (perl, LOG_DEBUG) },
933 { "", NULL }
934 };
936 int i = 0;
938 dXSARGS;
940 if ((1 > items) || (2 < items)) {
941 log_err ("Usage: Collectd::bootstrap(name[, version])");
942 XSRETURN_EMPTY;
943 }
945 XS_VERSION_BOOTCHECK;
947 /* register API */
948 for (i = 0; NULL != api[i].f; ++i)
949 Perl_newXS (perl, api[i].name, api[i].f, file);
951 stash = Perl_gv_stashpv (perl, "Collectd", 1);
953 /* export "constants" */
954 for (i = 0; NULL != consts[i].value; ++i)
955 Perl_newCONSTSUB (perl, stash, consts[i].name, consts[i].value);
956 XSRETURN_YES;
957 } /* static XS (boot_Collectd) */
960 /*
961 * Interface to collectd.
962 */
964 static int perl_init (void)
965 {
966 if (NULL == perl)
967 return 0;
969 PERL_SET_CONTEXT (perl);
970 return pplugin_call_all (PLUGIN_INIT);
971 } /* static int perl_init (void) */
973 static int perl_read (void)
974 {
975 if (NULL == perl)
976 return 0;
978 PERL_SET_CONTEXT (perl);
979 return pplugin_call_all (PLUGIN_READ);
980 } /* static int perl_read (void) */
982 static int perl_write (const data_set_t *ds, const value_list_t *vl)
983 {
984 if (NULL == perl)
985 return 0;
987 PERL_SET_CONTEXT (perl);
988 return pplugin_call_all (PLUGIN_WRITE, ds, vl);
989 } /* static int perl_write (const data_set_t *, const value_list_t *) */
991 static void perl_log (int level, const char *msg)
992 {
993 if (NULL == perl)
994 return;
996 PERL_SET_CONTEXT (perl);
997 pplugin_call_all (PLUGIN_LOG, level, msg);
998 return;
999 } /* static void perl_log (int, const char *) */
1001 static int perl_shutdown (void)
1002 {
1003 int i = 0;
1004 int ret = 0;
1006 plugin_unregister_log ("perl");
1007 plugin_unregister_config ("perl");
1008 plugin_unregister_init ("perl");
1009 plugin_unregister_read ("perl");
1010 plugin_unregister_write ("perl");
1012 if (NULL == perl)
1013 return 0;
1015 PERL_SET_CONTEXT (perl);
1016 ret = pplugin_call_all (PLUGIN_SHUTDOWN);
1018 for (i = 0; i < PLUGIN_TYPES; ++i) {
1019 if (0 < Perl_hv_iterinit (perl, plugins[i])) {
1020 char *k = NULL;
1021 I32 l = 0;
1023 while (NULL != Perl_hv_iternextsv (perl, plugins[i], &k, &l)) {
1024 pplugin_unregister (i, k);
1025 }
1026 }
1028 Perl_hv_undef (perl, plugins[i]);
1029 }
1031 if (0 < Perl_hv_iterinit (perl, data_sets)) {
1032 char *k = NULL;
1033 I32 l = 0;
1035 while (NULL != Perl_hv_iternextsv (perl, data_sets, &k, &l)) {
1036 pplugin_unregister_data_set (k);
1037 }
1038 }
1040 Perl_hv_undef (perl, data_sets);
1042 #if COLLECT_DEBUG
1043 Perl_sv_report_used (perl);
1044 #endif /* COLLECT_DEBUG */
1046 perl_destruct (perl);
1047 perl_free (perl);
1048 perl = NULL;
1050 PERL_SYS_TERM ();
1052 plugin_unregister_shutdown ("perl");
1053 return ret;
1054 } /* static void perl_shutdown (void) */
1056 static void xs_init (pTHX)
1057 {
1058 char *file = __FILE__;
1060 dXSUB_SYS;
1062 /* build the Collectd module into the perl interpreter */
1063 Perl_newXS (perl, "Collectd::bootstrap", boot_Collectd, file);
1065 /* enable usage of Perl modules using shared libraries */
1066 Perl_newXS (perl, "DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
1067 return;
1068 } /* static void xs_init (pTHX) */
1070 /* Initialize the global Perl interpreter. */
1071 static int init_pi (int argc, char **argv)
1072 {
1073 int i = 0;
1075 if (NULL != perl)
1076 return 0;
1078 log_info ("Initializing Perl interpreter...");
1079 #if COLLECT_DEBUG
1080 for (i = 0; i < argc; ++i)
1081 log_debug ("argv[%i] = \"%s\"", i, argv[i]);
1082 #endif /* COLLECT_DEBUG */
1084 PERL_SYS_INIT3 (&argc, &argv, &environ);
1086 if (NULL == (perl = perl_alloc ())) {
1087 log_err ("module_register: Not enough memory.");
1088 exit (3);
1089 }
1090 perl_construct (perl);
1092 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
1094 if (0 != perl_parse (perl, xs_init, argc, argv, NULL)) {
1095 log_err ("module_register: Unable to bootstrap Collectd.");
1096 exit (1);
1097 }
1098 perl_run (perl);
1100 for (i = 0; i < PLUGIN_TYPES; ++i)
1101 plugins[i] = Perl_newHV (perl);
1103 data_sets = Perl_newHV (perl);
1105 plugin_register_log ("perl", perl_log);
1106 plugin_register_init ("perl", perl_init);
1108 plugin_register_read ("perl", perl_read);
1110 plugin_register_write ("perl", perl_write);
1111 plugin_register_shutdown ("perl", perl_shutdown);
1112 return 0;
1113 } /* static int init_pi (const char **, const int) */
1115 static int perl_config (const char *key, const char *value)
1116 {
1117 log_debug ("perl_config: key = \"%s\", value=\"%s\"", key, value);
1119 if (0 == strcasecmp (key, "LoadPlugin")) {
1120 char module_name[DATA_MAX_NAME_LEN];
1122 if (get_module_name (module_name, sizeof (module_name), value)
1123 == NULL) {
1124 log_err ("Invalid module name %s", value);
1125 return (1);
1126 } /* if (get_module_name == NULL) */
1128 init_pi (perl_argc, perl_argv);
1130 log_info ("perl_config: loading perl plugin \"%s\"", value);
1131 Perl_load_module (perl, PERL_LOADMOD_NOIMPORT,
1132 Perl_newSVpv (perl, module_name, strlen (module_name)),
1133 Nullsv);
1134 }
1135 else if (0 == strcasecmp (key, "BaseName")) {
1136 log_debug ("perl_config: Setting plugin basename to \"%s\"", value);
1137 strncpy (base_name, value, sizeof (base_name));
1138 base_name[sizeof (base_name) - 1] = '\0';
1139 }
1140 else if (0 == strcasecmp (key, "IncludeDir")) {
1141 perl_argv = (char **)realloc (perl_argv,
1142 (++perl_argc + 1) * sizeof (char *));
1144 if (NULL == perl_argv) {
1145 log_err ("perl_config: Not enough memory.");
1146 exit (3);
1147 }
1149 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 3);
1150 sstrncpy(perl_argv[perl_argc - 1], "-I", 3);
1151 sstrncpy(perl_argv[perl_argc - 1] + 2, value, strlen (value) + 1);
1153 perl_argv[perl_argc] = NULL;
1154 }
1155 else {
1156 return -1;
1157 }
1158 return 0;
1159 } /* static int perl_config (char *, char *) */
1161 void module_register (void)
1162 {
1163 perl_argc = 4;
1164 perl_argv = (char **)smalloc ((perl_argc + 1) * sizeof (char *));
1166 /* default options for the Perl interpreter */
1167 perl_argv[0] = "";
1168 perl_argv[1] = "-MCollectd";
1169 perl_argv[2] = "-e";
1170 perl_argv[3] = "1";
1171 perl_argv[4] = NULL;
1173 plugin_register_config ("perl", perl_config, config_keys, config_keys_num);
1174 return;
1175 } /* void module_register (void) */
1177 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */