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_PTHREAD_H
34 # include <pthread.h>
35 #endif
36 #if HAVE_SYS_SOCKET_H
37 # include <sys/socket.h>
38 #endif
39 #if HAVE_NETDB_H
40 # include <netdb.h>
41 #endif
42 #if HAVE_NETINET_IN_H
43 # include <netinet/in.h>
44 #endif
45 #if HAVE_ARPA_INET_H
46 # include <arpa/inet.h>
47 #endif
48 #if HAVE_POLL_H
49 # include <poll.h>
50 #endif
52 #include <gm_protocol.h>
54 #ifndef IPV6_ADD_MEMBERSHIP
55 # ifdef IPV6_JOIN_GROUP
56 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
57 # else
58 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
59 # endif
60 #endif /* !IP_ADD_MEMBERSHIP */
62 #ifdef GANGLIA_MAX_MESSAGE_LEN
63 # define BUFF_SIZE GANGLIA_MAX_MESSAGE_LEN
64 #else
65 # define BUFF_SIZE 1400
66 #endif
68 struct socket_entry_s
69 {
70 int fd;
71 struct sockaddr_storage addr;
72 socklen_t addrlen;
73 };
74 typedef struct socket_entry_s socket_entry_t;
76 struct staging_entry_s
77 {
78 char key[2 * DATA_MAX_NAME_LEN];
79 value_list_t vl;
80 int flags;
81 };
82 typedef struct staging_entry_s staging_entry_t;
84 struct metric_map_s
85 {
86 char *ganglia_name;
87 char *type;
88 char *type_instance;
89 char *ds_name;
90 int ds_type;
91 int ds_index;
92 };
93 typedef struct metric_map_s metric_map_t;
95 #define MC_RECEIVE_GROUP_DEFAULT "239.2.11.71"
96 static char *mc_receive_group = NULL;
97 #define MC_RECEIVE_PORT_DEFAULT "8649"
98 static char *mc_receive_port = NULL;
100 static struct pollfd *mc_receive_sockets = NULL;
101 static size_t mc_receive_sockets_num = 0;
103 static socket_entry_t *mc_send_sockets = NULL;
104 static size_t mc_send_sockets_num = 0;
105 static pthread_mutex_t mc_send_sockets_lock = PTHREAD_MUTEX_INITIALIZER;
107 static int mc_receive_thread_loop = 0;
108 static int mc_receive_thread_running = 0;
109 static pthread_t mc_receive_thread_id;
111 static metric_map_t metric_map_default[] =
112 { /*---------------+-------------+-----------+-------------+------+-----*
113 * ganglia_name ! type ! type_inst ! data_source ! type ! idx *
114 *---------------+-------------+-----------+-------------+------+-----*/
115 { "load_one", "load", "", "shortterm", -1, -1 },
116 { "load_five", "load", "", "midterm", -1, -1 },
117 { "load_fifteen", "load", "", "longterm", -1, -1 },
118 { "cpu_user", "cpu", "user", "value", -1, -1 },
119 { "cpu_system", "cpu", "system", "value", -1, -1 },
120 { "cpu_idle", "cpu", "idle", "value", -1, -1 },
121 { "cpu_nice", "cpu", "nice", "value", -1, -1 },
122 { "cpu_wio", "cpu", "wait", "value", -1, -1 },
123 { "mem_free", "memory", "free", "value", -1, -1 },
124 { "mem_shared", "memory", "shared", "value", -1, -1 },
125 { "mem_buffers", "memory", "buffered", "value", -1, -1 },
126 { "mem_cached", "memory", "cached", "value", -1, -1 },
127 { "mem_total", "memory", "total", "value", -1, -1 },
128 { "bytes_in", "if_octets", "", "rx", -1, -1 },
129 { "bytes_out", "if_octets", "", "tx", -1, -1 },
130 { "pkts_in", "if_packets", "", "rx", -1, -1 },
131 { "pkts_out", "if_packets", "", "tx", -1, -1 }
132 };
133 static size_t metric_map_len_default = STATIC_ARRAY_SIZE (metric_map_default);
135 static metric_map_t *metric_map = NULL;
136 static size_t metric_map_len = 0;
138 static c_avl_tree_t *staging_tree;
139 static pthread_mutex_t staging_lock = PTHREAD_MUTEX_INITIALIZER;
141 static metric_map_t *metric_lookup (const char *key) /* {{{ */
142 {
143 metric_map_t *map;
144 size_t map_len;
145 size_t i;
147 /* Search the user-supplied table first.. */
148 map = metric_map;
149 map_len = metric_map_len;
150 for (i = 0; i < map_len; i++)
151 if (strcmp (map[i].ganglia_name, key) == 0)
152 break;
154 /* .. and fall back to the built-in table if nothing is found. */
155 if (i >= map_len)
156 {
157 map = metric_map_default;
158 map_len = metric_map_len_default;
160 for (i = 0; i < map_len; i++)
161 if (strcmp (map[i].ganglia_name, key) == 0)
162 break;
163 }
165 if (i >= map_len)
166 return (NULL);
168 /* Look up the DS type and ds_index. */
169 if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) /* {{{ */
170 {
171 const data_set_t *ds;
173 ds = plugin_get_ds (map[i].type);
174 if (ds == NULL)
175 {
176 WARNING ("gmond plugin: Type not defined: %s", map[i].type);
177 return (NULL);
178 }
180 if ((map[i].ds_name == NULL) && (ds->ds_num != 1))
181 {
182 WARNING ("gmond plugin: No data source name defined for metric %s, "
183 "but type %s has more than one data source.",
184 map[i].ganglia_name, map[i].type);
185 return (NULL);
186 }
188 if (map[i].ds_name == NULL)
189 {
190 map[i].ds_index = 0;
191 }
192 else
193 {
194 int j;
196 for (j = 0; j < ds->ds_num; j++)
197 if (strcasecmp (ds->ds[j].name, map[i].ds_name) == 0)
198 break;
200 if (j >= ds->ds_num)
201 {
202 WARNING ("gmond plugin: There is no data source "
203 "named `%s' in type `%s'.",
204 map[i].ds_name, ds->type);
205 return (NULL);
206 }
207 map[i].ds_index = j;
208 }
210 map[i].ds_type = ds->ds[map[i].ds_index].type;
211 } /* }}} if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) */
213 return (map + i);
214 } /* }}} metric_map_t *metric_lookup */
216 static int create_sockets (socket_entry_t **ret_sockets, /* {{{ */
217 size_t *ret_sockets_num,
218 const char *node, const char *service, int listen)
219 {
220 struct addrinfo ai_hints;
221 struct addrinfo *ai_list;
222 struct addrinfo *ai_ptr;
223 int ai_return;
225 socket_entry_t *sockets = NULL;
226 size_t sockets_num = 0;
228 int status;
230 if (*ret_sockets != NULL)
231 return (EINVAL);
233 memset (&ai_hints, 0, sizeof (ai_hints));
234 ai_hints.ai_flags = 0;
235 #ifdef AI_PASSIVE
236 ai_hints.ai_flags |= AI_PASSIVE;
237 #endif
238 #ifdef AI_ADDRCONFIG
239 ai_hints.ai_flags |= AI_ADDRCONFIG;
240 #endif
241 ai_hints.ai_family = AF_UNSPEC;
242 ai_hints.ai_socktype = SOCK_DGRAM;
243 ai_hints.ai_protocol = IPPROTO_UDP;
245 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
246 if (ai_return != 0)
247 {
248 char errbuf[1024];
249 ERROR ("gmond plugin: getaddrinfo (%s, %s) failed: %s",
250 (node == NULL) ? "(null)" : node,
251 (service == NULL) ? "(null)" : service,
252 (ai_return == EAI_SYSTEM)
253 ? sstrerror (errno, errbuf, sizeof (errbuf))
254 : gai_strerror (ai_return));
255 return (-1);
256 }
258 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) /* {{{ */
259 {
260 socket_entry_t *tmp;
262 tmp = realloc (sockets, (sockets_num + 1) * sizeof (*sockets));
263 if (tmp == NULL)
264 {
265 ERROR ("gmond plugin: realloc failed.");
266 continue;
267 }
268 sockets = tmp;
270 sockets[sockets_num].fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
271 ai_ptr->ai_protocol);
272 if (sockets[sockets_num].fd < 0)
273 {
274 char errbuf[1024];
275 ERROR ("gmond plugin: socket failed: %s",
276 sstrerror (errno, errbuf, sizeof (errbuf)));
277 continue;
278 }
280 assert (sizeof (sockets[sockets_num].addr) >= ai_ptr->ai_addrlen);
281 memcpy (&sockets[sockets_num].addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
282 sockets[sockets_num].addrlen = ai_ptr->ai_addrlen;
284 /* Sending socket: Open only one socket and don't bind it. */
285 if (listen == 0)
286 {
287 sockets_num++;
288 break;
289 }
290 else
291 {
292 int yes = 1;
294 status = setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
295 (void *) &yes, sizeof (yes));
296 if (status != 0)
297 {
298 char errbuf[1024];
299 WARNING ("gmond plugin: setsockopt(2) failed: %s",
300 sstrerror (errno, errbuf, sizeof (errbuf)));
301 }
302 }
304 status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
305 if (status != 0)
306 {
307 char errbuf[1024];
308 ERROR ("gmond plugin: bind failed: %s",
309 sstrerror (errno, errbuf, sizeof (errbuf)));
310 close (sockets[sockets_num].fd);
311 continue;
312 }
314 if (ai_ptr->ai_family == AF_INET)
315 {
316 struct sockaddr_in *addr;
317 struct ip_mreq mreq;
318 int loop;
320 addr = (struct sockaddr_in *) ai_ptr->ai_addr;
322 if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
323 {
324 sockets_num++;
325 continue;
326 }
328 loop = 1;
329 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
330 (void *) &loop, sizeof (loop));
332 memset (&mreq, 0, sizeof (mreq));
333 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
334 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
335 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
336 (void *) &mreq, sizeof (mreq));
337 } /* if (ai_ptr->ai_family == AF_INET) */
338 else if (ai_ptr->ai_family == AF_INET6)
339 {
340 struct sockaddr_in6 *addr;
341 struct ipv6_mreq mreq;
342 int loop;
344 addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
346 if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
347 {
348 sockets_num++;
349 continue;
350 }
352 loop = 1;
353 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
354 (void *) &loop, sizeof (loop));
356 memset (&mreq, 0, sizeof (mreq));
357 memcpy (&mreq.ipv6mr_multiaddr,
358 &addr->sin6_addr, sizeof (addr->sin6_addr));
359 mreq.ipv6mr_interface = 0; /* any */
360 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
361 (void *) &mreq, sizeof (mreq));
362 } /* if (ai_ptr->ai_family == AF_INET6) */
364 sockets_num++;
365 } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
367 freeaddrinfo (ai_list);
369 if (sockets_num == 0)
370 {
371 sfree (sockets);
372 return (-1);
373 }
375 *ret_sockets = sockets;
376 *ret_sockets_num = sockets_num;
377 return (0);
378 } /* }}} int create_sockets */
380 static int request_meta_data (const char *host, const char *name) /* {{{ */
381 {
382 Ganglia_metadata_msg msg;
383 char buffer[BUFF_SIZE];
384 unsigned int buffer_size;
385 XDR xdr;
386 size_t i;
388 memset (&msg, 0, sizeof (msg));
390 msg.id = gmetadata_request;
391 msg.Ganglia_metadata_msg_u.grequest.metric_id.host = strdup (host);
392 msg.Ganglia_metadata_msg_u.grequest.metric_id.name = strdup (name);
394 if ((msg.Ganglia_metadata_msg_u.grequest.metric_id.host == NULL)
395 || (msg.Ganglia_metadata_msg_u.grequest.metric_id.name == NULL))
396 {
397 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
398 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
399 return (-1);
400 }
402 memset (buffer, 0, sizeof (buffer));
403 xdrmem_create (&xdr, buffer, sizeof (buffer), XDR_ENCODE);
405 if (!xdr_Ganglia_metadata_msg (&xdr, &msg))
406 {
407 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
408 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
409 return (-1);
410 }
412 buffer_size = xdr_getpos (&xdr);
414 DEBUG ("gmond plugin: Requesting meta data for %s/%s.",
415 host, name);
417 pthread_mutex_lock (&mc_send_sockets_lock);
418 for (i = 0; i < mc_send_sockets_num; i++)
419 {
420 ssize_t status = sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
421 /* flags = */ 0,
422 (struct sockaddr *) &mc_send_sockets[i].addr,
423 mc_send_sockets[i].addrlen);
424 if (status == -1)
425 {
426 char errbuf[1024];
427 ERROR ("gmond plugin: sendto(2) failed: %s",
428 sstrerror (errno, errbuf, sizeof (errbuf)));
429 continue;
430 }
431 }
432 pthread_mutex_unlock (&mc_send_sockets_lock);
434 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
435 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
436 return (0);
437 } /* }}} int request_meta_data */
439 static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
440 const char *name,
441 const char *type, const char *type_instance,
442 int values_len)
443 {
444 char key[2 * DATA_MAX_NAME_LEN];
445 staging_entry_t *se;
446 int status;
448 if (staging_tree == NULL)
449 return (NULL);
451 ssnprintf (key, sizeof (key), "%s/%s/%s", host, type,
452 (type_instance != NULL) ? type_instance : "");
454 se = NULL;
455 status = c_avl_get (staging_tree, key, (void *) &se);
456 if (status == 0)
457 return (se);
459 /* insert new entry */
460 se = (staging_entry_t *) malloc (sizeof (*se));
461 if (se == NULL)
462 return (NULL);
463 memset (se, 0, sizeof (*se));
465 sstrncpy (se->key, key, sizeof (se->key));
466 se->flags = 0;
468 se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
469 if (se->vl.values == NULL)
470 {
471 sfree (se);
472 return (NULL);
473 }
474 se->vl.values_len = values_len;
476 se->vl.time = 0;
477 se->vl.interval = 0;
478 sstrncpy (se->vl.host, host, sizeof (se->vl.host));
479 sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
480 sstrncpy (se->vl.type, type, sizeof (se->vl.type));
481 if (type_instance != NULL)
482 sstrncpy (se->vl.type_instance, type_instance,
483 sizeof (se->vl.type_instance));
485 status = c_avl_insert (staging_tree, se->key, se);
486 if (status != 0)
487 {
488 ERROR ("gmond plugin: c_avl_insert failed.");
489 sfree (se->vl.values);
490 sfree (se);
491 return (NULL);
492 }
494 return (se);
495 } /* }}} staging_entry_t *staging_entry_get */
497 static int staging_entry_update (const char *host, const char *name, /* {{{ */
498 const char *type, const char *type_instance,
499 int ds_index, int ds_type, value_t value)
500 {
501 const data_set_t *ds;
502 staging_entry_t *se;
504 ds = plugin_get_ds (type);
505 if (ds == NULL)
506 {
507 ERROR ("gmond plugin: Looking up type %s failed.", type);
508 return (-1);
509 }
511 if (ds->ds_num <= ds_index)
512 {
513 ERROR ("gmond plugin: Invalid index %i: %s has only %i data source(s).",
514 ds_index, ds->type, ds->ds_num);
515 return (-1);
516 }
518 pthread_mutex_lock (&staging_lock);
520 se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
521 if (se == NULL)
522 {
523 pthread_mutex_unlock (&staging_lock);
524 ERROR ("gmond plugin: staging_entry_get failed.");
525 return (-1);
526 }
527 if (se->vl.values_len != ds->ds_num)
528 {
529 pthread_mutex_unlock (&staging_lock);
530 return (-1);
531 }
533 if (ds_type == DS_TYPE_COUNTER)
534 se->vl.values[ds_index].counter += value.counter;
535 else if (ds_type == DS_TYPE_GAUGE)
536 se->vl.values[ds_index].gauge = value.gauge;
537 else if (ds_type == DS_TYPE_DERIVE)
538 se->vl.values[ds_index].derive += value.derive;
539 else if (ds_type == DS_TYPE_ABSOLUTE)
540 se->vl.values[ds_index].absolute = value.absolute;
541 else
542 assert (23 == 42);
544 se->flags |= (0x01 << ds_index);
546 /* Check if all data sources have been set. If not, return here. */
547 if (se->flags != ((0x01 << se->vl.values_len) - 1))
548 {
549 pthread_mutex_unlock (&staging_lock);
550 return (0);
551 }
553 /* Check if the interval of this metric is known. If not, request meta data
554 * and return. */
555 if (se->vl.interval == 0)
556 {
557 /* No meta data has been received for this metric yet. */
558 se->flags = 0;
559 pthread_mutex_unlock (&staging_lock);
561 request_meta_data (host, name);
562 return (0);
563 }
565 plugin_dispatch_values (&se->vl);
567 se->flags = 0;
568 pthread_mutex_unlock (&staging_lock);
570 return (0);
571 } /* }}} int staging_entry_update */
573 static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
574 {
575 const char *host;
576 const char *name;
577 metric_map_t *map;
579 value_t value_counter;
580 value_t value_gauge;
581 value_t value_derive;
583 /* Fill in `host', `name', `value_counter', and `value_gauge' according to
584 * the value type, or return with an error. */
585 switch (msg->id) /* {{{ */
586 {
587 case gmetric_uint:
588 {
589 Ganglia_gmetric_uint msg_uint;
591 msg_uint = msg->Ganglia_value_msg_u.gu_int;
593 host = msg_uint.metric_id.host;
594 name = msg_uint.metric_id.name;
595 value_counter.counter = (counter_t) msg_uint.ui;
596 value_gauge.gauge = (gauge_t) msg_uint.ui;
597 value_derive.derive = (derive_t) msg_uint.ui;
598 break;
599 }
601 case gmetric_string:
602 {
603 Ganglia_gmetric_string msg_string;
604 int status;
606 msg_string = msg->Ganglia_value_msg_u.gstr;
608 host = msg_string.metric_id.host;
609 name = msg_string.metric_id.name;
611 status = parse_value (msg_string.str, &value_derive, DS_TYPE_DERIVE);
612 if (status != 0)
613 value_derive.derive = -1;
615 status = parse_value (msg_string.str, &value_gauge, DS_TYPE_GAUGE);
616 if (status != 0)
617 value_gauge.gauge = NAN;
619 status = parse_value (msg_string.str, &value_counter, DS_TYPE_COUNTER);
620 if (status != 0)
621 value_counter.counter = 0;
623 break;
624 }
626 case gmetric_float:
627 {
628 Ganglia_gmetric_float msg_float;
630 msg_float = msg->Ganglia_value_msg_u.gf;
632 host = msg_float.metric_id.host;
633 name = msg_float.metric_id.name;
634 value_counter.counter = (counter_t) msg_float.f;
635 value_gauge.gauge = (gauge_t) msg_float.f;
636 value_derive.derive = (derive_t) msg_float.f;
637 break;
638 }
640 case gmetric_double:
641 {
642 Ganglia_gmetric_double msg_double;
644 msg_double = msg->Ganglia_value_msg_u.gd;
646 host = msg_double.metric_id.host;
647 name = msg_double.metric_id.name;
648 value_counter.counter = (counter_t) msg_double.d;
649 value_gauge.gauge = (gauge_t) msg_double.d;
650 value_derive.derive = (derive_t) msg_double.d;
651 break;
652 }
653 default:
654 DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
655 return (-1);
656 } /* }}} switch (msg->id) */
658 assert (host != NULL);
659 assert (name != NULL);
661 map = metric_lookup (name);
662 if (map != NULL)
663 {
664 value_t val_copy;
666 if ((map->ds_type == DS_TYPE_COUNTER)
667 || (map->ds_type == DS_TYPE_ABSOLUTE))
668 val_copy = value_counter;
669 else if (map->ds_type == DS_TYPE_GAUGE)
670 val_copy = value_gauge;
671 else if (map->ds_type == DS_TYPE_DERIVE)
672 val_copy = value_derive;
673 else
674 assert (23 == 42);
676 return (staging_entry_update (host, name,
677 map->type, map->type_instance,
678 map->ds_index, map->ds_type,
679 val_copy));
680 }
682 DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
683 return (-1);
684 } /* }}} int mc_handle_value_msg */
686 static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
687 {
688 switch (msg->id)
689 {
690 case gmetadata_full:
691 {
692 Ganglia_metadatadef msg_meta;
693 staging_entry_t *se;
694 const data_set_t *ds;
695 metric_map_t *map;
697 msg_meta = msg->Ganglia_metadata_msg_u.gfull;
699 if (msg_meta.metric.tmax <= 0)
700 return (-1);
702 map = metric_lookup (msg_meta.metric_id.name);
703 if (map == NULL)
704 {
705 DEBUG ("gmond plugin: Not handling meta data %s.",
706 msg_meta.metric_id.name);
707 return (0);
708 }
710 ds = plugin_get_ds (map->type);
711 if (ds == NULL)
712 {
713 WARNING ("gmond plugin: Could not find data set %s.", map->type);
714 return (-1);
715 }
717 DEBUG ("gmond plugin: Received meta data for %s/%s.",
718 msg_meta.metric_id.host, msg_meta.metric_id.name);
720 pthread_mutex_lock (&staging_lock);
721 se = staging_entry_get (msg_meta.metric_id.host,
722 msg_meta.metric_id.name,
723 map->type, map->type_instance,
724 ds->ds_num);
725 if (se != NULL)
726 se->vl.interval = TIME_T_TO_CDTIME_T (msg_meta.metric.tmax);
727 pthread_mutex_unlock (&staging_lock);
729 if (se == NULL)
730 {
731 ERROR ("gmond plugin: staging_entry_get failed.");
732 return (-1);
733 }
735 break;
736 }
738 default:
739 {
740 return (-1);
741 }
742 }
744 return (0);
745 } /* }}} int mc_handle_metadata_msg */
747 static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
748 {
749 XDR xdr;
750 Ganglia_msg_formats format;
752 xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
754 xdr_Ganglia_msg_formats (&xdr, &format);
755 xdr_setpos (&xdr, 0);
757 switch (format)
758 {
759 case gmetric_ushort:
760 case gmetric_short:
761 case gmetric_int:
762 case gmetric_uint:
763 case gmetric_string:
764 case gmetric_float:
765 case gmetric_double:
766 {
767 Ganglia_value_msg msg;
769 memset (&msg, 0, sizeof (msg));
770 if (xdr_Ganglia_value_msg (&xdr, &msg))
771 mc_handle_value_msg (&msg);
772 break;
773 }
775 case gmetadata_full:
776 case gmetadata_request:
777 {
778 Ganglia_metadata_msg msg;
779 memset (&msg, 0, sizeof (msg));
780 if (xdr_Ganglia_metadata_msg (&xdr, &msg))
781 mc_handle_metadata_msg (&msg);
782 break;
783 }
785 default:
786 DEBUG ("gmond plugin: Unknown format: %i", format);
787 return (-1);
788 } /* switch (format) */
791 return (0);
792 } /* }}} int mc_handle_metric */
794 static int mc_handle_socket (struct pollfd *p) /* {{{ */
795 {
796 char buffer[BUFF_SIZE];
797 ssize_t buffer_size;
799 if ((p->revents & (POLLIN | POLLPRI)) == 0)
800 {
801 p->revents = 0;
802 return (-1);
803 }
805 buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
806 if (buffer_size <= 0)
807 {
808 char errbuf[1024];
809 ERROR ("gmond plugin: recv failed: %s",
810 sstrerror (errno, errbuf, sizeof (errbuf)));
811 p->revents = 0;
812 return (-1);
813 }
815 mc_handle_metric (buffer, (size_t) buffer_size);
816 return (0);
817 } /* }}} int mc_handle_socket */
819 static void *mc_receive_thread (void *arg) /* {{{ */
820 {
821 socket_entry_t *mc_receive_socket_entries;
822 int status;
823 size_t i;
825 mc_receive_socket_entries = NULL;
826 status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
827 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
828 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
829 /* listen = */ 1);
830 if (status != 0)
831 {
832 ERROR ("gmond plugin: create_sockets failed.");
833 return ((void *) -1);
834 }
836 mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
837 sizeof (*mc_receive_sockets));
838 if (mc_receive_sockets == NULL)
839 {
840 ERROR ("gmond plugin: calloc failed.");
841 for (i = 0; i < mc_receive_sockets_num; i++)
842 close (mc_receive_socket_entries[i].fd);
843 free (mc_receive_socket_entries);
844 mc_receive_socket_entries = NULL;
845 mc_receive_sockets_num = 0;
846 return ((void *) -1);
847 }
849 for (i = 0; i < mc_receive_sockets_num; i++)
850 {
851 mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
852 mc_receive_sockets[i].events = POLLIN | POLLPRI;
853 mc_receive_sockets[i].revents = 0;
854 }
856 while (mc_receive_thread_loop != 0)
857 {
858 status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
859 if (status <= 0)
860 {
861 char errbuf[1024];
862 if (errno == EINTR)
863 continue;
864 ERROR ("gmond plugin: poll failed: %s",
865 sstrerror (errno, errbuf, sizeof (errbuf)));
866 break;
867 }
869 for (i = 0; i < mc_receive_sockets_num; i++)
870 {
871 if (mc_receive_sockets[i].revents != 0)
872 mc_handle_socket (mc_receive_sockets + i);
873 }
874 } /* while (mc_receive_thread_loop != 0) */
876 free (mc_receive_socket_entries);
877 return ((void *) 0);
878 } /* }}} void *mc_receive_thread */
880 static int mc_receive_thread_start (void) /* {{{ */
881 {
882 int status;
884 if (mc_receive_thread_running != 0)
885 return (-1);
887 mc_receive_thread_loop = 1;
889 status = plugin_thread_create (&mc_receive_thread_id, /* attr = */ NULL,
890 mc_receive_thread, /* args = */ NULL);
891 if (status != 0)
892 {
893 ERROR ("gmond plugin: Starting receive thread failed.");
894 mc_receive_thread_loop = 0;
895 return (-1);
896 }
898 mc_receive_thread_running = 1;
899 return (0);
900 } /* }}} int start_receive_thread */
902 static int mc_receive_thread_stop (void) /* {{{ */
903 {
904 if (mc_receive_thread_running == 0)
905 return (-1);
907 mc_receive_thread_loop = 0;
909 INFO ("gmond plugin: Stopping receive thread.");
910 pthread_kill (mc_receive_thread_id, SIGTERM);
911 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
912 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
914 mc_receive_thread_running = 0;
916 return (0);
917 } /* }}} int mc_receive_thread_stop */
919 /*
920 * Config:
921 *
922 * <Plugin gmond>
923 * MCReceiveFrom "239.2.11.71" "8649"
924 * <Metric "load_one">
925 * Type "load"
926 * [TypeInstance "foo"]
927 * [DataSource "bar"]
928 * </Metric>
929 * </Plugin>
930 */
931 static int gmond_config_set_string (oconfig_item_t *ci, char **str) /* {{{ */
932 {
933 char *tmp;
935 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
936 {
937 WARNING ("gmond plugin: The `%s' option needs "
938 "exactly one string argument.", ci->key);
939 return (-1);
940 }
942 tmp = strdup (ci->values[0].value.string);
943 if (tmp == NULL)
944 {
945 ERROR ("gmond plugin: strdup failed.");
946 return (-1);
947 }
949 sfree (*str);
950 *str = tmp;
951 return (0);
952 } /* }}} int gmond_config_set_string */
954 static int gmond_config_add_metric (oconfig_item_t *ci) /* {{{ */
955 {
956 metric_map_t *map;
957 int i;
959 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
960 {
961 WARNING ("gmond plugin: `Metric' blocks need "
962 "exactly one string argument.");
963 return (-1);
964 }
966 map = realloc (metric_map, (metric_map_len + 1) * sizeof (*metric_map));
967 if (map == NULL)
968 {
969 ERROR ("gmond plugin: realloc failed.");
970 return (-1);
971 }
972 metric_map = map;
973 map = metric_map + metric_map_len;
975 memset (map, 0, sizeof (*map));
976 map->type = NULL;
977 map->type_instance = NULL;
978 map->ds_name = NULL;
979 map->ds_type = -1;
980 map->ds_index = -1;
982 map->ganglia_name = strdup (ci->values[0].value.string);
983 if (map->ganglia_name == NULL)
984 {
985 ERROR ("gmond plugin: strdup failed.");
986 return (-1);
987 }
989 for (i = 0; i < ci->children_num; i++)
990 {
991 oconfig_item_t *child = ci->children + i;
992 if (strcasecmp ("Type", child->key) == 0)
993 gmond_config_set_string (child, &map->type);
994 else if (strcasecmp ("TypeInstance", child->key) == 0)
995 gmond_config_set_string (child, &map->type_instance);
996 else if (strcasecmp ("DataSource", child->key) == 0)
997 gmond_config_set_string (child, &map->ds_name);
998 else
999 {
1000 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1001 child->key);
1002 }
1003 }
1005 if (map->type == NULL)
1006 {
1007 ERROR ("gmond plugin: No type is set for metric %s.",
1008 map->ganglia_name);
1009 sfree (map->ganglia_name);
1010 sfree (map->type_instance);
1011 return (-1);
1012 }
1014 metric_map_len++;
1015 return (0);
1016 } /* }}} int gmond_config_add_metric */
1018 static int gmond_config_set_address (oconfig_item_t *ci, /* {{{ */
1019 char **ret_addr, char **ret_port)
1020 {
1021 char *addr;
1022 char *port;
1024 if ((ci->values_num != 1) && (ci->values_num != 2))
1025 {
1026 WARNING ("gmond plugin: The `%s' config option needs "
1027 "one or two string arguments.",
1028 ci->key);
1029 return (-1);
1030 }
1031 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
1032 || ((ci->values_num == 2)
1033 && (ci->values[1].type != OCONFIG_TYPE_STRING)))
1034 {
1035 WARNING ("gmond plugin: The `%s' config option needs "
1036 "one or two string arguments.",
1037 ci->key);
1038 return (-1);
1039 }
1041 addr = strdup (ci->values[0].value.string);
1042 if (ci->values_num == 2)
1043 port = strdup (ci->values[1].value.string);
1044 else
1045 port = NULL;
1047 if ((addr == NULL) || ((ci->values_num == 2) && (port == NULL)))
1048 {
1049 ERROR ("gmond plugin: strdup failed.");
1050 sfree (addr);
1051 sfree (port);
1052 return (-1);
1053 }
1055 sfree (*ret_addr);
1056 sfree (*ret_port);
1058 *ret_addr = addr;
1059 *ret_port = port;
1061 return (0);
1062 } /* }}} int gmond_config_set_address */
1064 static int gmond_config (oconfig_item_t *ci) /* {{{ */
1065 {
1066 int i;
1068 for (i = 0; i < ci->children_num; i++)
1069 {
1070 oconfig_item_t *child = ci->children + i;
1071 if (strcasecmp ("MCReceiveFrom", child->key) == 0)
1072 gmond_config_set_address (child, &mc_receive_group, &mc_receive_port);
1073 else if (strcasecmp ("Metric", child->key) == 0)
1074 gmond_config_add_metric (child);
1075 else
1076 {
1077 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1078 child->key);
1079 }
1080 }
1082 return (0);
1083 } /* }}} int gmond_config */
1085 static int gmond_init (void) /* {{{ */
1086 {
1087 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
1088 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
1089 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
1090 /* listen = */ 0);
1092 staging_tree = c_avl_create ((void *) strcmp);
1093 if (staging_tree == NULL)
1094 {
1095 ERROR ("gmond plugin: c_avl_create failed.");
1096 return (-1);
1097 }
1099 mc_receive_thread_start ();
1101 return (0);
1102 } /* }}} int gmond_init */
1104 static int gmond_shutdown (void) /* {{{ */
1105 {
1106 size_t i;
1108 mc_receive_thread_stop ();
1110 pthread_mutex_lock (&mc_send_sockets_lock);
1111 for (i = 0; i < mc_send_sockets_num; i++)
1112 {
1113 close (mc_send_sockets[i].fd);
1114 mc_send_sockets[i].fd = -1;
1115 }
1116 sfree (mc_send_sockets);
1117 mc_send_sockets_num = 0;
1118 pthread_mutex_unlock (&mc_send_sockets_lock);
1121 return (0);
1122 } /* }}} int gmond_shutdown */
1124 void module_register (void)
1125 {
1126 plugin_register_complex_config ("gmond", gmond_config);
1127 plugin_register_init ("gmond", gmond_init);
1128 plugin_register_shutdown ("gmond", gmond_shutdown);
1129 }
1131 /* vim: set sw=2 sts=2 et fdm=marker : */