9dda84c91c784c1337be99c0da983ff646070ac9
1 /**
2 * collectd - src/gmond.c
3 * Copyright (C) 2009-2015 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 **/
27 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "configfile.h"
31 #include "utils_avltree.h"
33 #if HAVE_NETDB_H
34 # include <netdb.h>
35 #endif
36 #if HAVE_NETINET_IN_H
37 # include <netinet/in.h>
38 #endif
39 #if HAVE_ARPA_INET_H
40 # include <arpa/inet.h>
41 #endif
42 #if HAVE_POLL_H
43 # include <poll.h>
44 #endif
46 #include <gm_protocol.h>
48 #ifndef IPV6_ADD_MEMBERSHIP
49 # ifdef IPV6_JOIN_GROUP
50 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
51 # else
52 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
53 # endif
54 #endif /* !IP_ADD_MEMBERSHIP */
56 #ifdef GANGLIA_MAX_MESSAGE_LEN
57 # define BUFF_SIZE GANGLIA_MAX_MESSAGE_LEN
58 #else
59 # define BUFF_SIZE 1400
60 #endif
62 struct socket_entry_s
63 {
64 int fd;
65 struct sockaddr_storage addr;
66 socklen_t addrlen;
67 };
68 typedef struct socket_entry_s socket_entry_t;
70 struct staging_entry_s
71 {
72 char key[2 * DATA_MAX_NAME_LEN];
73 value_list_t vl;
74 int flags;
75 };
76 typedef struct staging_entry_s staging_entry_t;
78 struct metric_map_s
79 {
80 char *ganglia_name;
81 char *type;
82 char *type_instance;
83 char *ds_name;
84 int ds_type;
85 size_t ds_index;
86 };
87 typedef struct metric_map_s metric_map_t;
89 #define MC_RECEIVE_GROUP_DEFAULT "239.2.11.71"
90 static char *mc_receive_group = NULL;
91 #define MC_RECEIVE_PORT_DEFAULT "8649"
92 static char *mc_receive_port = NULL;
94 static struct pollfd *mc_receive_sockets = NULL;
95 static size_t mc_receive_sockets_num = 0;
97 static socket_entry_t *mc_send_sockets = NULL;
98 static size_t mc_send_sockets_num = 0;
99 static pthread_mutex_t mc_send_sockets_lock = PTHREAD_MUTEX_INITIALIZER;
101 static int mc_receive_thread_loop = 0;
102 static int mc_receive_thread_running = 0;
103 static pthread_t mc_receive_thread_id;
105 static metric_map_t metric_map_default[] =
106 { /*---------------+-------------+-----------+-------------+------+-----*
107 * ganglia_name ! type ! type_inst ! data_source ! type ! idx *
108 *---------------+-------------+-----------+-------------+------+-----*/
109 { "load_one", "load", "", "shortterm", -1, -1 },
110 { "load_five", "load", "", "midterm", -1, -1 },
111 { "load_fifteen", "load", "", "longterm", -1, -1 },
112 { "cpu_user", "cpu", "user", "value", -1, -1 },
113 { "cpu_system", "cpu", "system", "value", -1, -1 },
114 { "cpu_idle", "cpu", "idle", "value", -1, -1 },
115 { "cpu_nice", "cpu", "nice", "value", -1, -1 },
116 { "cpu_wio", "cpu", "wait", "value", -1, -1 },
117 { "mem_free", "memory", "free", "value", -1, -1 },
118 { "mem_shared", "memory", "shared", "value", -1, -1 },
119 { "mem_buffers", "memory", "buffered", "value", -1, -1 },
120 { "mem_cached", "memory", "cached", "value", -1, -1 },
121 { "mem_total", "memory", "total", "value", -1, -1 },
122 { "bytes_in", "if_octets", "", "rx", -1, -1 },
123 { "bytes_out", "if_octets", "", "tx", -1, -1 },
124 { "pkts_in", "if_packets", "", "rx", -1, -1 },
125 { "pkts_out", "if_packets", "", "tx", -1, -1 }
126 };
127 static size_t metric_map_len_default = STATIC_ARRAY_SIZE (metric_map_default);
129 static metric_map_t *metric_map = NULL;
130 static size_t metric_map_len = 0;
132 static c_avl_tree_t *staging_tree;
133 static pthread_mutex_t staging_lock = PTHREAD_MUTEX_INITIALIZER;
135 static metric_map_t *metric_lookup (const char *key) /* {{{ */
136 {
137 metric_map_t *map;
138 size_t map_len;
139 size_t i;
141 /* Search the user-supplied table first.. */
142 map = metric_map;
143 map_len = metric_map_len;
144 for (i = 0; i < map_len; i++)
145 if (strcmp (map[i].ganglia_name, key) == 0)
146 break;
148 /* .. and fall back to the built-in table if nothing is found. */
149 if (i >= map_len)
150 {
151 map = metric_map_default;
152 map_len = metric_map_len_default;
154 for (i = 0; i < map_len; i++)
155 if (strcmp (map[i].ganglia_name, key) == 0)
156 break;
157 }
159 if (i >= map_len)
160 return (NULL);
162 /* Look up the DS type and ds_index. */
163 if (map[i].ds_type < 0) /* {{{ */
164 {
165 const data_set_t *ds;
167 ds = plugin_get_ds (map[i].type);
168 if (ds == NULL)
169 {
170 WARNING ("gmond plugin: Type not defined: %s", map[i].type);
171 return (NULL);
172 }
174 if ((map[i].ds_name == NULL) && (ds->ds_num != 1))
175 {
176 WARNING ("gmond plugin: No data source name defined for metric %s, "
177 "but type %s has more than one data source.",
178 map[i].ganglia_name, map[i].type);
179 return (NULL);
180 }
182 if (map[i].ds_name == NULL)
183 {
184 map[i].ds_index = 0;
185 }
186 else
187 {
188 size_t j;
190 for (j = 0; j < ds->ds_num; j++)
191 if (strcasecmp (ds->ds[j].name, map[i].ds_name) == 0)
192 break;
194 if (j >= ds->ds_num)
195 {
196 WARNING ("gmond plugin: There is no data source "
197 "named `%s' in type `%s'.",
198 map[i].ds_name, ds->type);
199 return (NULL);
200 }
201 map[i].ds_index = j;
202 }
204 map[i].ds_type = ds->ds[map[i].ds_index].type;
205 } /* }}} if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) */
207 return (map + i);
208 } /* }}} metric_map_t *metric_lookup */
210 static int create_sockets (socket_entry_t **ret_sockets, /* {{{ */
211 size_t *ret_sockets_num,
212 const char *node, const char *service, int listen)
213 {
214 struct addrinfo ai_hints = { 0 };
215 struct addrinfo *ai_list;
216 struct addrinfo *ai_ptr;
217 int ai_return;
219 socket_entry_t *sockets = NULL;
220 size_t sockets_num = 0;
222 int status;
224 if (*ret_sockets != NULL)
225 return (EINVAL);
227 ai_hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
228 ai_hints.ai_family = AF_UNSPEC;
229 ai_hints.ai_socktype = SOCK_DGRAM;
230 ai_hints.ai_protocol = IPPROTO_UDP;
232 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
233 if (ai_return != 0)
234 {
235 char errbuf[1024];
236 ERROR ("gmond plugin: getaddrinfo (%s, %s) failed: %s",
237 (node == NULL) ? "(null)" : node,
238 (service == NULL) ? "(null)" : service,
239 (ai_return == EAI_SYSTEM)
240 ? sstrerror (errno, errbuf, sizeof (errbuf))
241 : gai_strerror (ai_return));
242 return (-1);
243 }
245 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) /* {{{ */
246 {
247 socket_entry_t *tmp;
249 tmp = realloc (sockets, (sockets_num + 1) * sizeof (*sockets));
250 if (tmp == NULL)
251 {
252 ERROR ("gmond plugin: realloc failed.");
253 continue;
254 }
255 sockets = tmp;
257 sockets[sockets_num].fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
258 ai_ptr->ai_protocol);
259 if (sockets[sockets_num].fd < 0)
260 {
261 char errbuf[1024];
262 ERROR ("gmond plugin: socket failed: %s",
263 sstrerror (errno, errbuf, sizeof (errbuf)));
264 continue;
265 }
267 assert (sizeof (sockets[sockets_num].addr) >= ai_ptr->ai_addrlen);
268 memcpy (&sockets[sockets_num].addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
269 sockets[sockets_num].addrlen = ai_ptr->ai_addrlen;
271 /* Sending socket: Open only one socket and don't bind it. */
272 if (listen == 0)
273 {
274 sockets_num++;
275 break;
276 }
277 else
278 {
279 int yes = 1;
281 status = setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
282 (void *) &yes, sizeof (yes));
283 if (status != 0)
284 {
285 char errbuf[1024];
286 WARNING ("gmond plugin: setsockopt(2) failed: %s",
287 sstrerror (errno, errbuf, sizeof (errbuf)));
288 }
289 }
291 status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
292 if (status != 0)
293 {
294 char errbuf[1024];
295 ERROR ("gmond plugin: bind failed: %s",
296 sstrerror (errno, errbuf, sizeof (errbuf)));
297 close (sockets[sockets_num].fd);
298 continue;
299 }
301 if (ai_ptr->ai_family == AF_INET)
302 {
303 struct sockaddr_in *addr;
304 int loop;
306 addr = (struct sockaddr_in *) ai_ptr->ai_addr;
308 if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
309 {
310 sockets_num++;
311 continue;
312 }
314 loop = 1;
315 status = setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
316 (void *) &loop, sizeof (loop));
317 if (status != 0)
318 {
319 char errbuf[1024];
320 WARNING ("gmond plugin: setsockopt(2) failed: %s",
321 sstrerror (errno, errbuf, sizeof (errbuf)));
322 }
324 struct ip_mreq mreq = {
325 .imr_multiaddr.s_addr = addr->sin_addr.s_addr,
326 .imr_interface.s_addr = htonl (INADDR_ANY)
327 };
329 status = setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
330 (void *) &mreq, sizeof (mreq));
331 if (status != 0)
332 {
333 char errbuf[1024];
334 WARNING ("gmond plugin: setsockopt(2) failed: %s",
335 sstrerror (errno, errbuf, sizeof (errbuf)));
336 }
337 } /* if (ai_ptr->ai_family == AF_INET) */
338 else if (ai_ptr->ai_family == AF_INET6)
339 {
340 struct sockaddr_in6 *addr;
341 int loop;
343 addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
345 if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
346 {
347 sockets_num++;
348 continue;
349 }
351 loop = 1;
352 status = setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
353 (void *) &loop, sizeof (loop));
354 if (status != 0)
355 {
356 char errbuf[1024];
357 WARNING ("gmond plugin: setsockopt(2) failed: %s",
358 sstrerror (errno, errbuf, sizeof (errbuf)));
359 }
361 struct ipv6_mreq mreq = {
362 .ipv6mr_interface = 0 /* any */
363 };
365 memcpy (&mreq.ipv6mr_multiaddr,
366 &addr->sin6_addr, sizeof (addr->sin6_addr));
367 status = setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
368 (void *) &mreq, sizeof (mreq));
369 if (status != 0)
370 {
371 char errbuf[1024];
372 WARNING ("gmond plugin: setsockopt(2) failed: %s",
373 sstrerror (errno, errbuf, sizeof (errbuf)));
374 }
375 } /* if (ai_ptr->ai_family == AF_INET6) */
377 sockets_num++;
378 } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
380 freeaddrinfo (ai_list);
382 if (sockets_num == 0)
383 {
384 sfree (sockets);
385 return (-1);
386 }
388 *ret_sockets = sockets;
389 *ret_sockets_num = sockets_num;
390 return (0);
391 } /* }}} int create_sockets */
393 static int request_meta_data (const char *host, const char *name) /* {{{ */
394 {
395 Ganglia_metadata_msg msg = { 0 };
396 char buffer[BUFF_SIZE] = { 0 };
397 unsigned int buffer_size;
398 XDR xdr;
399 size_t i;
401 msg.id = gmetadata_request;
402 msg.Ganglia_metadata_msg_u.grequest.metric_id.host = strdup (host);
403 msg.Ganglia_metadata_msg_u.grequest.metric_id.name = strdup (name);
405 if ((msg.Ganglia_metadata_msg_u.grequest.metric_id.host == NULL)
406 || (msg.Ganglia_metadata_msg_u.grequest.metric_id.name == NULL))
407 {
408 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
409 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
410 return (-1);
411 }
413 xdrmem_create (&xdr, buffer, sizeof (buffer), XDR_ENCODE);
415 if (!xdr_Ganglia_metadata_msg (&xdr, &msg))
416 {
417 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
418 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
419 return (-1);
420 }
422 buffer_size = xdr_getpos (&xdr);
424 DEBUG ("gmond plugin: Requesting meta data for %s/%s.",
425 host, name);
427 pthread_mutex_lock (&mc_send_sockets_lock);
428 for (i = 0; i < mc_send_sockets_num; i++)
429 {
430 ssize_t status = sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
431 /* flags = */ 0,
432 (struct sockaddr *) &mc_send_sockets[i].addr,
433 mc_send_sockets[i].addrlen);
434 if (status == -1)
435 {
436 char errbuf[1024];
437 ERROR ("gmond plugin: sendto(2) failed: %s",
438 sstrerror (errno, errbuf, sizeof (errbuf)));
439 continue;
440 }
441 }
442 pthread_mutex_unlock (&mc_send_sockets_lock);
444 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
445 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
446 return (0);
447 } /* }}} int request_meta_data */
449 static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
450 const char *name,
451 const char *type, const char *type_instance,
452 int values_len)
453 {
454 char key[2 * DATA_MAX_NAME_LEN];
455 staging_entry_t *se;
456 int status;
458 if (staging_tree == NULL)
459 return (NULL);
461 ssnprintf (key, sizeof (key), "%s/%s/%s", host, type,
462 (type_instance != NULL) ? type_instance : "");
464 se = NULL;
465 status = c_avl_get (staging_tree, key, (void *) &se);
466 if (status == 0)
467 return (se);
469 /* insert new entry */
470 se = calloc (1, sizeof (*se));
471 if (se == NULL)
472 return (NULL);
474 sstrncpy (se->key, key, sizeof (se->key));
475 se->flags = 0;
477 se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
478 if (se->vl.values == NULL)
479 {
480 sfree (se);
481 return (NULL);
482 }
483 se->vl.values_len = values_len;
485 se->vl.time = 0;
486 se->vl.interval = 0;
487 sstrncpy (se->vl.host, host, sizeof (se->vl.host));
488 sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
489 sstrncpy (se->vl.type, type, sizeof (se->vl.type));
490 if (type_instance != NULL)
491 sstrncpy (se->vl.type_instance, type_instance,
492 sizeof (se->vl.type_instance));
494 status = c_avl_insert (staging_tree, se->key, se);
495 if (status != 0)
496 {
497 ERROR ("gmond plugin: c_avl_insert failed.");
498 sfree (se->vl.values);
499 sfree (se);
500 return (NULL);
501 }
503 return (se);
504 } /* }}} staging_entry_t *staging_entry_get */
506 static int staging_entry_update (const char *host, const char *name, /* {{{ */
507 const char *type, const char *type_instance,
508 size_t ds_index, int ds_type, value_t value)
509 {
510 const data_set_t *ds;
511 staging_entry_t *se;
513 ds = plugin_get_ds (type);
514 if (ds == NULL)
515 {
516 ERROR ("gmond plugin: Looking up type %s failed.", type);
517 return (-1);
518 }
520 if (ds->ds_num <= ds_index)
521 {
522 ERROR ("gmond plugin: Invalid index %zu: %s has only %zu data source(s).",
523 ds_index, ds->type, ds->ds_num);
524 return (-1);
525 }
527 pthread_mutex_lock (&staging_lock);
529 se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
530 if (se == NULL)
531 {
532 pthread_mutex_unlock (&staging_lock);
533 ERROR ("gmond plugin: staging_entry_get failed.");
534 return (-1);
535 }
536 if (se->vl.values_len != ds->ds_num)
537 {
538 pthread_mutex_unlock (&staging_lock);
539 return (-1);
540 }
542 if (ds_type == DS_TYPE_COUNTER)
543 se->vl.values[ds_index].counter += value.counter;
544 else if (ds_type == DS_TYPE_GAUGE)
545 se->vl.values[ds_index].gauge = value.gauge;
546 else if (ds_type == DS_TYPE_DERIVE)
547 se->vl.values[ds_index].derive += value.derive;
548 else if (ds_type == DS_TYPE_ABSOLUTE)
549 se->vl.values[ds_index].absolute = value.absolute;
550 else
551 assert (23 == 42);
553 se->flags |= (0x01 << ds_index);
555 /* Check if all data sources have been set. If not, return here. */
556 if (se->flags != ((0x01 << se->vl.values_len) - 1))
557 {
558 pthread_mutex_unlock (&staging_lock);
559 return (0);
560 }
562 /* Check if the interval of this metric is known. If not, request meta data
563 * and return. */
564 if (se->vl.interval == 0)
565 {
566 /* No meta data has been received for this metric yet. */
567 se->flags = 0;
568 pthread_mutex_unlock (&staging_lock);
570 request_meta_data (host, name);
571 return (0);
572 }
574 plugin_dispatch_values (&se->vl);
576 se->flags = 0;
577 pthread_mutex_unlock (&staging_lock);
579 return (0);
580 } /* }}} int staging_entry_update */
582 static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
583 {
584 const char *host;
585 const char *name;
586 metric_map_t *map;
588 value_t value_counter;
589 value_t value_gauge;
590 value_t value_derive;
592 /* Fill in `host', `name', `value_counter', and `value_gauge' according to
593 * the value type, or return with an error. */
594 switch (msg->id) /* {{{ */
595 {
596 case gmetric_uint:
597 {
598 Ganglia_gmetric_uint msg_uint;
600 msg_uint = msg->Ganglia_value_msg_u.gu_int;
602 host = msg_uint.metric_id.host;
603 name = msg_uint.metric_id.name;
604 value_counter.counter = (counter_t) msg_uint.ui;
605 value_gauge.gauge = (gauge_t) msg_uint.ui;
606 value_derive.derive = (derive_t) msg_uint.ui;
607 break;
608 }
610 case gmetric_string:
611 {
612 Ganglia_gmetric_string msg_string;
613 int status;
615 msg_string = msg->Ganglia_value_msg_u.gstr;
617 host = msg_string.metric_id.host;
618 name = msg_string.metric_id.name;
620 status = parse_value (msg_string.str, &value_derive, DS_TYPE_DERIVE);
621 if (status != 0)
622 value_derive.derive = -1;
624 status = parse_value (msg_string.str, &value_gauge, DS_TYPE_GAUGE);
625 if (status != 0)
626 value_gauge.gauge = NAN;
628 status = parse_value (msg_string.str, &value_counter, DS_TYPE_COUNTER);
629 if (status != 0)
630 value_counter.counter = 0;
632 break;
633 }
635 case gmetric_float:
636 {
637 Ganglia_gmetric_float msg_float;
639 msg_float = msg->Ganglia_value_msg_u.gf;
641 host = msg_float.metric_id.host;
642 name = msg_float.metric_id.name;
643 value_counter.counter = (counter_t) msg_float.f;
644 value_gauge.gauge = (gauge_t) msg_float.f;
645 value_derive.derive = (derive_t) msg_float.f;
646 break;
647 }
649 case gmetric_double:
650 {
651 Ganglia_gmetric_double msg_double;
653 msg_double = msg->Ganglia_value_msg_u.gd;
655 host = msg_double.metric_id.host;
656 name = msg_double.metric_id.name;
657 value_counter.counter = (counter_t) msg_double.d;
658 value_gauge.gauge = (gauge_t) msg_double.d;
659 value_derive.derive = (derive_t) msg_double.d;
660 break;
661 }
662 default:
663 DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
664 return (-1);
665 } /* }}} switch (msg->id) */
667 assert (host != NULL);
668 assert (name != NULL);
670 map = metric_lookup (name);
671 if (map != NULL)
672 {
673 value_t val_copy;
675 if ((map->ds_type == DS_TYPE_COUNTER)
676 || (map->ds_type == DS_TYPE_ABSOLUTE))
677 val_copy = value_counter;
678 else if (map->ds_type == DS_TYPE_GAUGE)
679 val_copy = value_gauge;
680 else if (map->ds_type == DS_TYPE_DERIVE)
681 val_copy = value_derive;
682 else
683 assert (23 == 42);
685 return (staging_entry_update (host, name,
686 map->type, map->type_instance,
687 map->ds_index, map->ds_type,
688 val_copy));
689 }
691 DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
692 return (-1);
693 } /* }}} int mc_handle_value_msg */
695 static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
696 {
697 switch (msg->id)
698 {
699 case gmetadata_full:
700 {
701 Ganglia_metadatadef msg_meta;
702 staging_entry_t *se;
703 const data_set_t *ds;
704 metric_map_t *map;
706 msg_meta = msg->Ganglia_metadata_msg_u.gfull;
708 if (msg_meta.metric.tmax == 0)
709 return (-1);
711 map = metric_lookup (msg_meta.metric_id.name);
712 if (map == NULL)
713 {
714 DEBUG ("gmond plugin: Not handling meta data %s.",
715 msg_meta.metric_id.name);
716 return (0);
717 }
719 ds = plugin_get_ds (map->type);
720 if (ds == NULL)
721 {
722 WARNING ("gmond plugin: Could not find data set %s.", map->type);
723 return (-1);
724 }
726 DEBUG ("gmond plugin: Received meta data for %s/%s.",
727 msg_meta.metric_id.host, msg_meta.metric_id.name);
729 pthread_mutex_lock (&staging_lock);
730 se = staging_entry_get (msg_meta.metric_id.host,
731 msg_meta.metric_id.name,
732 map->type, map->type_instance,
733 ds->ds_num);
734 if (se != NULL)
735 se->vl.interval = TIME_T_TO_CDTIME_T (msg_meta.metric.tmax);
736 pthread_mutex_unlock (&staging_lock);
738 if (se == NULL)
739 {
740 ERROR ("gmond plugin: staging_entry_get failed.");
741 return (-1);
742 }
744 break;
745 }
747 default:
748 {
749 return (-1);
750 }
751 }
753 return (0);
754 } /* }}} int mc_handle_metadata_msg */
756 static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
757 {
758 XDR xdr;
759 Ganglia_msg_formats format;
761 xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
763 xdr_Ganglia_msg_formats (&xdr, &format);
764 xdr_setpos (&xdr, 0);
766 switch (format)
767 {
768 case gmetric_ushort:
769 case gmetric_short:
770 case gmetric_int:
771 case gmetric_uint:
772 case gmetric_string:
773 case gmetric_float:
774 case gmetric_double:
775 {
776 Ganglia_value_msg msg = { 0 };
778 if (xdr_Ganglia_value_msg (&xdr, &msg))
779 mc_handle_value_msg (&msg);
780 break;
781 }
783 case gmetadata_full:
784 case gmetadata_request:
785 {
786 Ganglia_metadata_msg msg = { 0 };
787 if (xdr_Ganglia_metadata_msg (&xdr, &msg))
788 mc_handle_metadata_msg (&msg);
789 break;
790 }
792 default:
793 DEBUG ("gmond plugin: Unknown format: %i", format);
794 return (-1);
795 } /* switch (format) */
798 return (0);
799 } /* }}} int mc_handle_metric */
801 static int mc_handle_socket (struct pollfd *p) /* {{{ */
802 {
803 char buffer[BUFF_SIZE];
804 ssize_t buffer_size;
806 if ((p->revents & (POLLIN | POLLPRI)) == 0)
807 {
808 p->revents = 0;
809 return (-1);
810 }
812 buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
813 if (buffer_size <= 0)
814 {
815 char errbuf[1024];
816 ERROR ("gmond plugin: recv failed: %s",
817 sstrerror (errno, errbuf, sizeof (errbuf)));
818 p->revents = 0;
819 return (-1);
820 }
822 mc_handle_metric (buffer, (size_t) buffer_size);
823 return (0);
824 } /* }}} int mc_handle_socket */
826 static void *mc_receive_thread (void *arg) /* {{{ */
827 {
828 socket_entry_t *mc_receive_socket_entries;
829 int status;
830 size_t i;
832 mc_receive_socket_entries = NULL;
833 status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
834 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
835 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
836 /* listen = */ 1);
837 if (status != 0)
838 {
839 ERROR ("gmond plugin: create_sockets failed.");
840 return ((void *) -1);
841 }
843 mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
844 sizeof (*mc_receive_sockets));
845 if (mc_receive_sockets == NULL)
846 {
847 ERROR ("gmond plugin: calloc failed.");
848 for (i = 0; i < mc_receive_sockets_num; i++)
849 close (mc_receive_socket_entries[i].fd);
850 free (mc_receive_socket_entries);
851 mc_receive_socket_entries = NULL;
852 mc_receive_sockets_num = 0;
853 return ((void *) -1);
854 }
856 for (i = 0; i < mc_receive_sockets_num; i++)
857 {
858 mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
859 mc_receive_sockets[i].events = POLLIN | POLLPRI;
860 mc_receive_sockets[i].revents = 0;
861 }
863 while (mc_receive_thread_loop != 0)
864 {
865 status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
866 if (status <= 0)
867 {
868 char errbuf[1024];
869 if (errno == EINTR)
870 continue;
871 ERROR ("gmond plugin: poll failed: %s",
872 sstrerror (errno, errbuf, sizeof (errbuf)));
873 break;
874 }
876 for (i = 0; i < mc_receive_sockets_num; i++)
877 {
878 if (mc_receive_sockets[i].revents != 0)
879 mc_handle_socket (mc_receive_sockets + i);
880 }
881 } /* while (mc_receive_thread_loop != 0) */
883 free (mc_receive_socket_entries);
884 return ((void *) 0);
885 } /* }}} void *mc_receive_thread */
887 static int mc_receive_thread_start (void) /* {{{ */
888 {
889 int status;
891 if (mc_receive_thread_running != 0)
892 return (-1);
894 mc_receive_thread_loop = 1;
896 status = plugin_thread_create (&mc_receive_thread_id, /* attr = */ NULL,
897 mc_receive_thread, /* args = */ NULL);
898 if (status != 0)
899 {
900 ERROR ("gmond plugin: Starting receive thread failed.");
901 mc_receive_thread_loop = 0;
902 return (-1);
903 }
905 mc_receive_thread_running = 1;
906 return (0);
907 } /* }}} int start_receive_thread */
909 static int mc_receive_thread_stop (void) /* {{{ */
910 {
911 if (mc_receive_thread_running == 0)
912 return (-1);
914 mc_receive_thread_loop = 0;
916 INFO ("gmond plugin: Stopping receive thread.");
917 pthread_kill (mc_receive_thread_id, SIGTERM);
918 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
919 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
921 mc_receive_thread_running = 0;
923 return (0);
924 } /* }}} int mc_receive_thread_stop */
926 /*
927 * Config:
928 *
929 * <Plugin gmond>
930 * MCReceiveFrom "239.2.11.71" "8649"
931 * <Metric "load_one">
932 * Type "load"
933 * [TypeInstance "foo"]
934 * [DataSource "bar"]
935 * </Metric>
936 * </Plugin>
937 */
938 static int gmond_config_set_string (oconfig_item_t *ci, char **str) /* {{{ */
939 {
940 char *tmp;
942 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
943 {
944 WARNING ("gmond plugin: The `%s' option needs "
945 "exactly one string argument.", ci->key);
946 return (-1);
947 }
949 tmp = strdup (ci->values[0].value.string);
950 if (tmp == NULL)
951 {
952 ERROR ("gmond plugin: strdup failed.");
953 return (-1);
954 }
956 sfree (*str);
957 *str = tmp;
958 return (0);
959 } /* }}} int gmond_config_set_string */
961 static int gmond_config_add_metric (oconfig_item_t *ci) /* {{{ */
962 {
963 metric_map_t *map;
964 int i;
966 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
967 {
968 WARNING ("gmond plugin: `Metric' blocks need "
969 "exactly one string argument.");
970 return (-1);
971 }
973 map = realloc (metric_map, (metric_map_len + 1) * sizeof (*metric_map));
974 if (map == NULL)
975 {
976 ERROR ("gmond plugin: realloc failed.");
977 return (-1);
978 }
979 metric_map = map;
980 map = metric_map + metric_map_len;
982 memset (map, 0, sizeof (*map));
983 map->type = NULL;
984 map->type_instance = NULL;
985 map->ds_name = NULL;
986 map->ds_type = -1;
987 map->ds_index = -1;
989 map->ganglia_name = strdup (ci->values[0].value.string);
990 if (map->ganglia_name == NULL)
991 {
992 ERROR ("gmond plugin: strdup failed.");
993 return (-1);
994 }
996 for (i = 0; i < ci->children_num; i++)
997 {
998 oconfig_item_t *child = ci->children + i;
999 if (strcasecmp ("Type", child->key) == 0)
1000 gmond_config_set_string (child, &map->type);
1001 else if (strcasecmp ("TypeInstance", child->key) == 0)
1002 gmond_config_set_string (child, &map->type_instance);
1003 else if (strcasecmp ("DataSource", child->key) == 0)
1004 gmond_config_set_string (child, &map->ds_name);
1005 else
1006 {
1007 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1008 child->key);
1009 }
1010 }
1012 if (map->type == NULL)
1013 {
1014 ERROR ("gmond plugin: No type is set for metric %s.",
1015 map->ganglia_name);
1016 sfree (map->ganglia_name);
1017 sfree (map->type_instance);
1018 return (-1);
1019 }
1021 metric_map_len++;
1022 return (0);
1023 } /* }}} int gmond_config_add_metric */
1025 static int gmond_config_set_address (oconfig_item_t *ci, /* {{{ */
1026 char **ret_addr, char **ret_port)
1027 {
1028 char *addr;
1029 char *port;
1031 if ((ci->values_num != 1) && (ci->values_num != 2))
1032 {
1033 WARNING ("gmond plugin: The `%s' config option needs "
1034 "one or two string arguments.",
1035 ci->key);
1036 return (-1);
1037 }
1038 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
1039 || ((ci->values_num == 2)
1040 && (ci->values[1].type != OCONFIG_TYPE_STRING)))
1041 {
1042 WARNING ("gmond plugin: The `%s' config option needs "
1043 "one or two string arguments.",
1044 ci->key);
1045 return (-1);
1046 }
1048 addr = strdup (ci->values[0].value.string);
1049 if (ci->values_num == 2)
1050 port = strdup (ci->values[1].value.string);
1051 else
1052 port = NULL;
1054 if ((addr == NULL) || ((ci->values_num == 2) && (port == NULL)))
1055 {
1056 ERROR ("gmond plugin: strdup failed.");
1057 sfree (addr);
1058 sfree (port);
1059 return (-1);
1060 }
1062 sfree (*ret_addr);
1063 sfree (*ret_port);
1065 *ret_addr = addr;
1066 *ret_port = port;
1068 return (0);
1069 } /* }}} int gmond_config_set_address */
1071 static int gmond_config (oconfig_item_t *ci) /* {{{ */
1072 {
1073 int i;
1075 for (i = 0; i < ci->children_num; i++)
1076 {
1077 oconfig_item_t *child = ci->children + i;
1078 if (strcasecmp ("MCReceiveFrom", child->key) == 0)
1079 gmond_config_set_address (child, &mc_receive_group, &mc_receive_port);
1080 else if (strcasecmp ("Metric", child->key) == 0)
1081 gmond_config_add_metric (child);
1082 else
1083 {
1084 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1085 child->key);
1086 }
1087 }
1089 return (0);
1090 } /* }}} int gmond_config */
1092 static int gmond_init (void) /* {{{ */
1093 {
1094 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
1095 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
1096 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
1097 /* listen = */ 0);
1099 staging_tree = c_avl_create ((int (*) (const void *, const void *)) strcmp);
1100 if (staging_tree == NULL)
1101 {
1102 ERROR ("gmond plugin: c_avl_create failed.");
1103 return (-1);
1104 }
1106 mc_receive_thread_start ();
1108 return (0);
1109 } /* }}} int gmond_init */
1111 static int gmond_shutdown (void) /* {{{ */
1112 {
1113 size_t i;
1115 mc_receive_thread_stop ();
1117 pthread_mutex_lock (&mc_send_sockets_lock);
1118 for (i = 0; i < mc_send_sockets_num; i++)
1119 {
1120 close (mc_send_sockets[i].fd);
1121 mc_send_sockets[i].fd = -1;
1122 }
1123 sfree (mc_send_sockets);
1124 mc_send_sockets_num = 0;
1125 pthread_mutex_unlock (&mc_send_sockets_lock);
1128 return (0);
1129 } /* }}} int gmond_shutdown */
1131 void module_register (void)
1132 {
1133 plugin_register_complex_config ("gmond", gmond_config);
1134 plugin_register_init ("gmond", gmond_init);
1135 plugin_register_shutdown ("gmond", gmond_shutdown);
1136 }
1138 /* vim: set sw=2 sts=2 et fdm=marker : */