1 /**
2 * collectd - src/gmond.c
3 * Copyright (C) 2009,2010 Florian octo Forster
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 * Authors:
19 * Florian octo Forster <octo at collectd.org>
20 **/
22 #include "collectd.h"
23 #include "plugin.h"
24 #include "common.h"
25 #include "configfile.h"
26 #include "utils_avltree.h"
28 #if HAVE_PTHREAD_H
29 # include <pthread.h>
30 #endif
31 #if HAVE_SYS_SOCKET_H
32 # include <sys/socket.h>
33 #endif
34 #if HAVE_NETDB_H
35 # include <netdb.h>
36 #endif
37 #if HAVE_NETINET_IN_H
38 # include <netinet/in.h>
39 #endif
40 #if HAVE_ARPA_INET_H
41 # include <arpa/inet.h>
42 #endif
43 #if HAVE_POLL_H
44 # include <poll.h>
45 #endif
47 #include <gm_protocol.h>
49 #ifndef IPV6_ADD_MEMBERSHIP
50 # ifdef IPV6_JOIN_GROUP
51 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
52 # else
53 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
54 # endif
55 #endif /* !IP_ADD_MEMBERSHIP */
57 #ifdef GANGLIA_MAX_MESSAGE_LEN
58 # define BUFF_SIZE GANGLIA_MAX_MESSAGE_LEN
59 #else
60 # define BUFF_SIZE 1400
61 #endif
63 struct socket_entry_s
64 {
65 int fd;
66 struct sockaddr_storage addr;
67 socklen_t addrlen;
68 };
69 typedef struct socket_entry_s socket_entry_t;
71 struct staging_entry_s
72 {
73 char key[2 * DATA_MAX_NAME_LEN];
74 value_list_t vl;
75 int flags;
76 };
77 typedef struct staging_entry_s staging_entry_t;
79 struct metric_map_s
80 {
81 char *ganglia_name;
82 char *type;
83 char *type_instance;
84 char *ds_name;
85 int ds_type;
86 int ds_index;
87 };
88 typedef struct metric_map_s metric_map_t;
90 #define MC_RECEIVE_GROUP_DEFAULT "239.2.11.71"
91 static char *mc_receive_group = NULL;
92 #define MC_RECEIVE_PORT_DEFAULT "8649"
93 static char *mc_receive_port = NULL;
95 static struct pollfd *mc_receive_sockets = NULL;
96 static size_t mc_receive_sockets_num = 0;
98 static socket_entry_t *mc_send_sockets = NULL;
99 static size_t mc_send_sockets_num = 0;
100 static pthread_mutex_t mc_send_sockets_lock = PTHREAD_MUTEX_INITIALIZER;
102 static int mc_receive_thread_loop = 0;
103 static int mc_receive_thread_running = 0;
104 static pthread_t mc_receive_thread_id;
106 static metric_map_t metric_map_default[] =
107 { /*---------------+-------------+-----------+-------------+------+-----*
108 * ganglia_name ! type ! type_inst ! data_source ! type ! idx *
109 *---------------+-------------+-----------+-------------+------+-----*/
110 { "load_one", "load", "", "shortterm", -1, -1 },
111 { "load_five", "load", "", "midterm", -1, -1 },
112 { "load_fifteen", "load", "", "longterm", -1, -1 },
113 { "cpu_user", "cpu", "user", "value", -1, -1 },
114 { "cpu_system", "cpu", "system", "value", -1, -1 },
115 { "cpu_idle", "cpu", "idle", "value", -1, -1 },
116 { "cpu_nice", "cpu", "nice", "value", -1, -1 },
117 { "cpu_wio", "cpu", "wait", "value", -1, -1 },
118 { "mem_free", "memory", "free", "value", -1, -1 },
119 { "mem_shared", "memory", "shared", "value", -1, -1 },
120 { "mem_buffers", "memory", "buffered", "value", -1, -1 },
121 { "mem_cached", "memory", "cached", "value", -1, -1 },
122 { "mem_total", "memory", "total", "value", -1, -1 },
123 { "bytes_in", "if_octets", "", "rx", -1, -1 },
124 { "bytes_out", "if_octets", "", "tx", -1, -1 },
125 { "pkts_in", "if_packets", "", "rx", -1, -1 },
126 { "pkts_out", "if_packets", "", "tx", -1, -1 }
127 };
128 static size_t metric_map_len_default = STATIC_ARRAY_SIZE (metric_map_default);
130 static metric_map_t *metric_map = NULL;
131 static size_t metric_map_len = 0;
133 static c_avl_tree_t *staging_tree;
134 static pthread_mutex_t staging_lock = PTHREAD_MUTEX_INITIALIZER;
136 static metric_map_t *metric_lookup (const char *key) /* {{{ */
137 {
138 metric_map_t *map;
139 size_t map_len;
140 size_t i;
142 /* Search the user-supplied table first.. */
143 map = metric_map;
144 map_len = metric_map_len;
145 for (i = 0; i < map_len; i++)
146 if (strcmp (map[i].ganglia_name, key) == 0)
147 break;
149 /* .. and fall back to the built-in table if nothing is found. */
150 if (i >= map_len)
151 {
152 map = metric_map_default;
153 map_len = metric_map_len_default;
155 for (i = 0; i < map_len; i++)
156 if (strcmp (map[i].ganglia_name, key) == 0)
157 break;
158 }
160 if (i >= map_len)
161 return (NULL);
163 /* Look up the DS type and ds_index. */
164 if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) /* {{{ */
165 {
166 const data_set_t *ds;
168 ds = plugin_get_ds (map[i].type);
169 if (ds == NULL)
170 {
171 WARNING ("gmond plugin: Type not defined: %s", map[i].type);
172 return (NULL);
173 }
175 if ((map[i].ds_name == NULL) && (ds->ds_num != 1))
176 {
177 WARNING ("gmond plugin: No data source name defined for metric %s, "
178 "but type %s has more than one data source.",
179 map[i].ganglia_name, map[i].type);
180 return (NULL);
181 }
183 if (map[i].ds_name == NULL)
184 {
185 map[i].ds_index = 0;
186 }
187 else
188 {
189 int j;
191 for (j = 0; j < ds->ds_num; j++)
192 if (strcasecmp (ds->ds[j].name, map[i].ds_name) == 0)
193 break;
195 if (j >= ds->ds_num)
196 {
197 WARNING ("gmond plugin: There is no data source "
198 "named `%s' in type `%s'.",
199 map[i].ds_name, ds->type);
200 return (NULL);
201 }
202 map[i].ds_index = j;
203 }
205 map[i].ds_type = ds->ds[map[i].ds_index].type;
206 } /* }}} if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) */
208 return (map + i);
209 } /* }}} metric_map_t *metric_lookup */
211 static int create_sockets (socket_entry_t **ret_sockets, /* {{{ */
212 size_t *ret_sockets_num,
213 const char *node, const char *service, int listen)
214 {
215 struct addrinfo ai_hints;
216 struct addrinfo *ai_list;
217 struct addrinfo *ai_ptr;
218 int ai_return;
220 socket_entry_t *sockets = NULL;
221 size_t sockets_num = 0;
223 int status;
225 if (*ret_sockets != NULL)
226 return (EINVAL);
228 memset (&ai_hints, 0, sizeof (ai_hints));
229 ai_hints.ai_flags = 0;
230 #ifdef AI_PASSIVE
231 ai_hints.ai_flags |= AI_PASSIVE;
232 #endif
233 #ifdef AI_ADDRCONFIG
234 ai_hints.ai_flags |= AI_ADDRCONFIG;
235 #endif
236 ai_hints.ai_family = AF_UNSPEC;
237 ai_hints.ai_socktype = SOCK_DGRAM;
238 ai_hints.ai_protocol = IPPROTO_UDP;
240 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
241 if (ai_return != 0)
242 {
243 char errbuf[1024];
244 ERROR ("gmond plugin: getaddrinfo (%s, %s) failed: %s",
245 (node == NULL) ? "(null)" : node,
246 (service == NULL) ? "(null)" : service,
247 (ai_return == EAI_SYSTEM)
248 ? sstrerror (errno, errbuf, sizeof (errbuf))
249 : gai_strerror (ai_return));
250 return (-1);
251 }
253 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) /* {{{ */
254 {
255 socket_entry_t *tmp;
257 tmp = realloc (sockets, (sockets_num + 1) * sizeof (*sockets));
258 if (tmp == NULL)
259 {
260 ERROR ("gmond plugin: realloc failed.");
261 continue;
262 }
263 sockets = tmp;
265 sockets[sockets_num].fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
266 ai_ptr->ai_protocol);
267 if (sockets[sockets_num].fd < 0)
268 {
269 char errbuf[1024];
270 ERROR ("gmond plugin: socket failed: %s",
271 sstrerror (errno, errbuf, sizeof (errbuf)));
272 continue;
273 }
275 assert (sizeof (sockets[sockets_num].addr) >= ai_ptr->ai_addrlen);
276 memcpy (&sockets[sockets_num].addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
277 sockets[sockets_num].addrlen = ai_ptr->ai_addrlen;
279 /* Sending socket: Open only one socket and don't bind it. */
280 if (listen == 0)
281 {
282 sockets_num++;
283 break;
284 }
285 else
286 {
287 int yes = 1;
289 status = setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
290 (void *) &yes, sizeof (yes));
291 if (status != 0)
292 {
293 char errbuf[1024];
294 WARNING ("gmond plugin: setsockopt(2) failed: %s",
295 sstrerror (errno, errbuf, sizeof (errbuf)));
296 }
297 }
299 status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
300 if (status != 0)
301 {
302 char errbuf[1024];
303 ERROR ("gmond plugin: bind failed: %s",
304 sstrerror (errno, errbuf, sizeof (errbuf)));
305 close (sockets[sockets_num].fd);
306 continue;
307 }
309 if (ai_ptr->ai_family == AF_INET)
310 {
311 struct sockaddr_in *addr;
312 struct ip_mreq mreq;
313 int loop;
315 addr = (struct sockaddr_in *) ai_ptr->ai_addr;
317 if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
318 {
319 sockets_num++;
320 continue;
321 }
323 loop = 1;
324 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
325 (void *) &loop, sizeof (loop));
327 memset (&mreq, 0, sizeof (mreq));
328 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
329 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
330 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
331 (void *) &mreq, sizeof (mreq));
332 } /* if (ai_ptr->ai_family == AF_INET) */
333 else if (ai_ptr->ai_family == AF_INET6)
334 {
335 struct sockaddr_in6 *addr;
336 struct ipv6_mreq mreq;
337 int loop;
339 addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
341 if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
342 {
343 sockets_num++;
344 continue;
345 }
347 loop = 1;
348 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
349 (void *) &loop, sizeof (loop));
351 memset (&mreq, 0, sizeof (mreq));
352 memcpy (&mreq.ipv6mr_multiaddr,
353 &addr->sin6_addr, sizeof (addr->sin6_addr));
354 mreq.ipv6mr_interface = 0; /* any */
355 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
356 (void *) &mreq, sizeof (mreq));
357 } /* if (ai_ptr->ai_family == AF_INET6) */
359 sockets_num++;
360 } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
362 freeaddrinfo (ai_list);
364 if (sockets_num == 0)
365 {
366 sfree (sockets);
367 return (-1);
368 }
370 *ret_sockets = sockets;
371 *ret_sockets_num = sockets_num;
372 return (0);
373 } /* }}} int create_sockets */
375 static int request_meta_data (const char *host, const char *name) /* {{{ */
376 {
377 Ganglia_metadata_msg msg;
378 char buffer[BUFF_SIZE];
379 unsigned int buffer_size;
380 XDR xdr;
381 size_t i;
383 memset (&msg, 0, sizeof (msg));
385 msg.id = gmetadata_request;
386 msg.Ganglia_metadata_msg_u.grequest.metric_id.host = strdup (host);
387 msg.Ganglia_metadata_msg_u.grequest.metric_id.name = strdup (name);
389 if ((msg.Ganglia_metadata_msg_u.grequest.metric_id.host == NULL)
390 || (msg.Ganglia_metadata_msg_u.grequest.metric_id.name == NULL))
391 {
392 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
393 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
394 return (-1);
395 }
397 memset (buffer, 0, sizeof (buffer));
398 xdrmem_create (&xdr, buffer, sizeof (buffer), XDR_ENCODE);
400 if (!xdr_Ganglia_metadata_msg (&xdr, &msg))
401 {
402 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
403 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
404 return (-1);
405 }
407 buffer_size = xdr_getpos (&xdr);
409 DEBUG ("gmond plugin: Requesting meta data for %s/%s.",
410 host, name);
412 pthread_mutex_lock (&mc_send_sockets_lock);
413 for (i = 0; i < mc_send_sockets_num; i++)
414 sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
415 /* flags = */ 0,
416 (struct sockaddr *) &mc_send_sockets[i].addr,
417 mc_send_sockets[i].addrlen);
418 pthread_mutex_unlock (&mc_send_sockets_lock);
420 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
421 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
422 return (0);
423 } /* }}} int request_meta_data */
425 static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
426 const char *name,
427 const char *type, const char *type_instance,
428 int values_len)
429 {
430 char key[2 * DATA_MAX_NAME_LEN];
431 staging_entry_t *se;
432 int status;
434 if (staging_tree == NULL)
435 return (NULL);
437 ssnprintf (key, sizeof (key), "%s/%s/%s", host, type,
438 (type_instance != NULL) ? type_instance : "");
440 se = NULL;
441 status = c_avl_get (staging_tree, key, (void *) &se);
442 if (status == 0)
443 return (se);
445 /* insert new entry */
446 se = (staging_entry_t *) malloc (sizeof (*se));
447 if (se == NULL)
448 return (NULL);
449 memset (se, 0, sizeof (*se));
451 sstrncpy (se->key, key, sizeof (se->key));
452 se->flags = 0;
454 se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
455 if (se->vl.values == NULL)
456 {
457 sfree (se);
458 return (NULL);
459 }
460 se->vl.values_len = values_len;
462 se->vl.time = 0;
463 se->vl.interval = 0;
464 sstrncpy (se->vl.host, host, sizeof (se->vl.host));
465 sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
466 sstrncpy (se->vl.type, type, sizeof (se->vl.type));
467 if (type_instance != NULL)
468 sstrncpy (se->vl.type_instance, type_instance,
469 sizeof (se->vl.type_instance));
471 status = c_avl_insert (staging_tree, se->key, se);
472 if (status != 0)
473 {
474 ERROR ("gmond plugin: c_avl_insert failed.");
475 sfree (se->vl.values);
476 sfree (se);
477 return (NULL);
478 }
480 return (se);
481 } /* }}} staging_entry_t *staging_entry_get */
483 static int staging_entry_submit (const char *host, const char *name, /* {{{ */
484 staging_entry_t *se)
485 {
486 value_list_t vl;
487 value_t values[se->vl.values_len];
489 if (se->vl.interval == 0)
490 {
491 /* No meta data has been received for this metric yet. */
492 se->flags = 0;
493 pthread_mutex_unlock (&staging_lock);
494 request_meta_data (host, name);
495 return (0);
496 }
498 se->flags = 0;
500 memcpy (values, se->vl.values, sizeof (values));
501 memcpy (&vl, &se->vl, sizeof (vl));
503 /* Unlock before calling `plugin_dispatch_values'.. */
504 pthread_mutex_unlock (&staging_lock);
506 vl.values = values;
508 plugin_dispatch_values (&vl);
510 return (0);
511 } /* }}} int staging_entry_submit */
513 static int staging_entry_update (const char *host, const char *name, /* {{{ */
514 const char *type, const char *type_instance,
515 int ds_index, int ds_type, value_t value)
516 {
517 const data_set_t *ds;
518 staging_entry_t *se;
520 ds = plugin_get_ds (type);
521 if (ds == NULL)
522 {
523 ERROR ("gmond plugin: Looking up type %s failed.", type);
524 return (-1);
525 }
527 if (ds->ds_num <= ds_index)
528 {
529 ERROR ("gmond plugin: Invalid index %i: %s has only %i data source(s).",
530 ds_index, ds->type, ds->ds_num);
531 return (-1);
532 }
534 pthread_mutex_lock (&staging_lock);
536 se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
537 if (se == NULL)
538 {
539 pthread_mutex_unlock (&staging_lock);
540 ERROR ("gmond plugin: staging_entry_get failed.");
541 return (-1);
542 }
543 if (se->vl.values_len != ds->ds_num)
544 {
545 pthread_mutex_unlock (&staging_lock);
546 return (-1);
547 }
549 if (ds_type == DS_TYPE_COUNTER)
550 se->vl.values[ds_index].counter += value.counter;
551 else if (ds_type == DS_TYPE_GAUGE)
552 se->vl.values[ds_index].gauge = value.gauge;
553 else if (ds_type == DS_TYPE_DERIVE)
554 se->vl.values[ds_index].derive += value.derive;
555 else if (ds_type == DS_TYPE_ABSOLUTE)
556 se->vl.values[ds_index].absolute = value.absolute;
557 else
558 assert (23 == 42);
560 se->flags |= (0x01 << ds_index);
562 /* Check if all values have been set and submit if so. */
563 if (se->flags == ((0x01 << se->vl.values_len) - 1))
564 {
565 /* `staging_lock' is unlocked in `staging_entry_submit'. */
566 staging_entry_submit (host, name, se);
567 }
568 else
569 {
570 pthread_mutex_unlock (&staging_lock);
571 }
573 return (0);
574 } /* }}} int staging_entry_update */
576 static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
577 {
578 const char *host;
579 const char *name;
580 metric_map_t *map;
582 value_t value_counter;
583 value_t value_gauge;
584 value_t value_derive;
586 /* Fill in `host', `name', `value_counter', and `value_gauge' according to
587 * the value type, or return with an error. */
588 switch (msg->id) /* {{{ */
589 {
590 case gmetric_uint:
591 {
592 Ganglia_gmetric_uint msg_uint;
594 msg_uint = msg->Ganglia_value_msg_u.gu_int;
596 host = msg_uint.metric_id.host;
597 name = msg_uint.metric_id.name;
598 value_counter.counter = (counter_t) msg_uint.ui;
599 value_gauge.gauge = (gauge_t) msg_uint.ui;
600 value_derive.derive = (derive_t) msg_uint.ui;
601 break;
602 }
604 case gmetric_string:
605 {
606 Ganglia_gmetric_string msg_string;
607 int status;
609 msg_string = msg->Ganglia_value_msg_u.gstr;
611 host = msg_string.metric_id.host;
612 name = msg_string.metric_id.name;
614 status = parse_value (msg_string.str, &value_derive, DS_TYPE_DERIVE);
615 if (status != 0)
616 value_derive.derive = -1;
618 status = parse_value (msg_string.str, &value_gauge, DS_TYPE_GAUGE);
619 if (status != 0)
620 value_gauge.gauge = NAN;
622 status = parse_value (msg_string.str, &value_counter, DS_TYPE_COUNTER);
623 if (status != 0)
624 value_counter.counter = 0;
626 break;
627 }
629 case gmetric_float:
630 {
631 Ganglia_gmetric_float msg_float;
633 msg_float = msg->Ganglia_value_msg_u.gf;
635 host = msg_float.metric_id.host;
636 name = msg_float.metric_id.name;
637 value_counter.counter = (counter_t) msg_float.f;
638 value_gauge.gauge = (gauge_t) msg_float.f;
639 value_derive.derive = (derive_t) msg_float.f;
640 break;
641 }
643 case gmetric_double:
644 {
645 Ganglia_gmetric_double msg_double;
647 msg_double = msg->Ganglia_value_msg_u.gd;
649 host = msg_double.metric_id.host;
650 name = msg_double.metric_id.name;
651 value_counter.counter = (counter_t) msg_double.d;
652 value_gauge.gauge = (gauge_t) msg_double.d;
653 value_derive.derive = (derive_t) msg_double.d;
654 break;
655 }
656 default:
657 DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
658 return (-1);
659 } /* }}} switch (msg->id) */
661 assert (host != NULL);
662 assert (name != NULL);
664 map = metric_lookup (name);
665 if (map != NULL)
666 {
667 value_t val_copy;
669 if ((map->ds_type == DS_TYPE_COUNTER)
670 || (map->ds_type == DS_TYPE_ABSOLUTE))
671 val_copy = value_counter;
672 else if (map->ds_type == DS_TYPE_GAUGE)
673 val_copy = value_gauge;
674 else if (map->ds_type == DS_TYPE_DERIVE)
675 val_copy = value_derive;
676 else
677 assert (23 == 42);
679 return (staging_entry_update (host, name,
680 map->type, map->type_instance,
681 map->ds_index, map->ds_type,
682 val_copy));
683 }
685 DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
686 return (-1);
687 } /* }}} int mc_handle_value_msg */
689 static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
690 {
691 switch (msg->id)
692 {
693 case gmetadata_full:
694 {
695 Ganglia_metadatadef msg_meta;
696 staging_entry_t *se;
697 const data_set_t *ds;
698 metric_map_t *map;
700 msg_meta = msg->Ganglia_metadata_msg_u.gfull;
702 if (msg_meta.metric.tmax <= 0)
703 return (-1);
705 map = metric_lookup (msg_meta.metric_id.name);
706 if (map == NULL)
707 {
708 DEBUG ("gmond plugin: Not handling meta data %s.",
709 msg_meta.metric_id.name);
710 return (0);
711 }
713 ds = plugin_get_ds (map->type);
714 if (ds == NULL)
715 {
716 WARNING ("gmond plugin: Could not find data set %s.", map->type);
717 return (-1);
718 }
720 DEBUG ("gmond plugin: Received meta data for %s/%s.",
721 msg_meta.metric_id.host, msg_meta.metric_id.name);
723 pthread_mutex_lock (&staging_lock);
724 se = staging_entry_get (msg_meta.metric_id.host,
725 msg_meta.metric_id.name,
726 map->type, map->type_instance,
727 ds->ds_num);
728 if (se != NULL)
729 se->vl.interval = TIME_T_TO_CDTIME_T (msg_meta.metric.tmax);
730 pthread_mutex_unlock (&staging_lock);
732 if (se == NULL)
733 {
734 ERROR ("gmond plugin: staging_entry_get failed.");
735 return (-1);
736 }
738 break;
739 }
741 default:
742 {
743 return (-1);
744 }
745 }
747 return (0);
748 } /* }}} int mc_handle_metadata_msg */
750 static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
751 {
752 XDR xdr;
753 Ganglia_msg_formats format;
755 xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
757 xdr_Ganglia_msg_formats (&xdr, &format);
758 xdr_setpos (&xdr, 0);
760 switch (format)
761 {
762 case gmetric_ushort:
763 case gmetric_short:
764 case gmetric_int:
765 case gmetric_uint:
766 case gmetric_string:
767 case gmetric_float:
768 case gmetric_double:
769 {
770 Ganglia_value_msg msg;
772 memset (&msg, 0, sizeof (msg));
773 if (xdr_Ganglia_value_msg (&xdr, &msg))
774 mc_handle_value_msg (&msg);
775 break;
776 }
778 case gmetadata_full:
779 case gmetadata_request:
780 {
781 Ganglia_metadata_msg msg;
782 memset (&msg, 0, sizeof (msg));
783 if (xdr_Ganglia_metadata_msg (&xdr, &msg))
784 mc_handle_metadata_msg (&msg);
785 break;
786 }
788 default:
789 DEBUG ("gmond plugin: Unknown format: %i", format);
790 return (-1);
791 } /* switch (format) */
794 return (0);
795 } /* }}} int mc_handle_metric */
797 static int mc_handle_socket (struct pollfd *p) /* {{{ */
798 {
799 char buffer[BUFF_SIZE];
800 ssize_t buffer_size;
802 if ((p->revents & (POLLIN | POLLPRI)) == 0)
803 {
804 p->revents = 0;
805 return (-1);
806 }
808 buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
809 if (buffer_size <= 0)
810 {
811 char errbuf[1024];
812 ERROR ("gmond plugin: recv failed: %s",
813 sstrerror (errno, errbuf, sizeof (errbuf)));
814 p->revents = 0;
815 return (-1);
816 }
818 mc_handle_metric (buffer, (size_t) buffer_size);
819 return (0);
820 } /* }}} int mc_handle_socket */
822 static void *mc_receive_thread (void *arg) /* {{{ */
823 {
824 socket_entry_t *mc_receive_socket_entries;
825 int status;
826 size_t i;
828 mc_receive_socket_entries = NULL;
829 status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
830 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
831 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
832 /* listen = */ 1);
833 if (status != 0)
834 {
835 ERROR ("gmond plugin: create_sockets failed.");
836 return ((void *) -1);
837 }
839 mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
840 sizeof (*mc_receive_sockets));
841 if (mc_receive_sockets == NULL)
842 {
843 ERROR ("gmond plugin: calloc failed.");
844 for (i = 0; i < mc_receive_sockets_num; i++)
845 close (mc_receive_socket_entries[i].fd);
846 free (mc_receive_socket_entries);
847 mc_receive_socket_entries = NULL;
848 mc_receive_sockets_num = 0;
849 return ((void *) -1);
850 }
852 for (i = 0; i < mc_receive_sockets_num; i++)
853 {
854 mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
855 mc_receive_sockets[i].events = POLLIN | POLLPRI;
856 mc_receive_sockets[i].revents = 0;
857 }
859 while (mc_receive_thread_loop != 0)
860 {
861 status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
862 if (status <= 0)
863 {
864 char errbuf[1024];
865 if (errno == EINTR)
866 continue;
867 ERROR ("gmond plugin: poll failed: %s",
868 sstrerror (errno, errbuf, sizeof (errbuf)));
869 break;
870 }
872 for (i = 0; i < mc_receive_sockets_num; i++)
873 {
874 if (mc_receive_sockets[i].revents != 0)
875 mc_handle_socket (mc_receive_sockets + i);
876 }
877 } /* while (mc_receive_thread_loop != 0) */
879 free (mc_receive_socket_entries);
880 return ((void *) 0);
881 } /* }}} void *mc_receive_thread */
883 static int mc_receive_thread_start (void) /* {{{ */
884 {
885 int status;
887 if (mc_receive_thread_running != 0)
888 return (-1);
890 mc_receive_thread_loop = 1;
892 status = plugin_thread_create (&mc_receive_thread_id, /* attr = */ NULL,
893 mc_receive_thread, /* args = */ NULL);
894 if (status != 0)
895 {
896 ERROR ("gmond plugin: Starting receive thread failed.");
897 mc_receive_thread_loop = 0;
898 return (-1);
899 }
901 mc_receive_thread_running = 1;
902 return (0);
903 } /* }}} int start_receive_thread */
905 static int mc_receive_thread_stop (void) /* {{{ */
906 {
907 if (mc_receive_thread_running == 0)
908 return (-1);
910 mc_receive_thread_loop = 0;
912 INFO ("gmond plugin: Stopping receive thread.");
913 pthread_kill (mc_receive_thread_id, SIGTERM);
914 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
915 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
917 mc_receive_thread_running = 0;
919 return (0);
920 } /* }}} int mc_receive_thread_stop */
922 /*
923 * Config:
924 *
925 * <Plugin gmond>
926 * MCReceiveFrom "239.2.11.71" "8649"
927 * <Metric "load_one">
928 * Type "load"
929 * [TypeInstance "foo"]
930 * [DataSource "bar"]
931 * </Metric>
932 * </Plugin>
933 */
934 static int gmond_config_set_string (oconfig_item_t *ci, char **str) /* {{{ */
935 {
936 char *tmp;
938 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
939 {
940 WARNING ("gmond plugin: The `%s' option needs "
941 "exactly one string argument.", ci->key);
942 return (-1);
943 }
945 tmp = strdup (ci->values[0].value.string);
946 if (tmp == NULL)
947 {
948 ERROR ("gmond plugin: strdup failed.");
949 return (-1);
950 }
952 sfree (*str);
953 *str = tmp;
954 return (0);
955 } /* }}} int gmond_config_set_string */
957 static int gmond_config_add_metric (oconfig_item_t *ci) /* {{{ */
958 {
959 metric_map_t *map;
960 int i;
962 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
963 {
964 WARNING ("gmond plugin: `Metric' blocks need "
965 "exactly one string argument.");
966 return (-1);
967 }
969 map = realloc (metric_map, (metric_map_len + 1) * sizeof (*metric_map));
970 if (map == NULL)
971 {
972 ERROR ("gmond plugin: realloc failed.");
973 return (-1);
974 }
975 metric_map = map;
976 map = metric_map + metric_map_len;
978 memset (map, 0, sizeof (*map));
979 map->type = NULL;
980 map->type_instance = NULL;
981 map->ds_name = NULL;
982 map->ds_type = -1;
983 map->ds_index = -1;
985 map->ganglia_name = strdup (ci->values[0].value.string);
986 if (map->ganglia_name == NULL)
987 {
988 ERROR ("gmond plugin: strdup failed.");
989 return (-1);
990 }
992 for (i = 0; i < ci->children_num; i++)
993 {
994 oconfig_item_t *child = ci->children + i;
995 if (strcasecmp ("Type", child->key) == 0)
996 gmond_config_set_string (child, &map->type);
997 else if (strcasecmp ("TypeInstance", child->key) == 0)
998 gmond_config_set_string (child, &map->type_instance);
999 else if (strcasecmp ("DataSource", child->key) == 0)
1000 gmond_config_set_string (child, &map->ds_name);
1001 else
1002 {
1003 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1004 child->key);
1005 }
1006 }
1008 if (map->type == NULL)
1009 {
1010 ERROR ("gmond plugin: No type is set for metric %s.",
1011 map->ganglia_name);
1012 sfree (map->ganglia_name);
1013 sfree (map->type_instance);
1014 return (-1);
1015 }
1017 metric_map_len++;
1018 return (0);
1019 } /* }}} int gmond_config_add_metric */
1021 static int gmond_config_set_address (oconfig_item_t *ci, /* {{{ */
1022 char **ret_addr, char **ret_port)
1023 {
1024 char *addr;
1025 char *port;
1027 if ((ci->values_num != 1) && (ci->values_num != 2))
1028 {
1029 WARNING ("gmond plugin: The `%s' config option needs "
1030 "one or two string arguments.",
1031 ci->key);
1032 return (-1);
1033 }
1034 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
1035 || ((ci->values_num == 2)
1036 && (ci->values[1].type != OCONFIG_TYPE_STRING)))
1037 {
1038 WARNING ("gmond plugin: The `%s' config option needs "
1039 "one or two string arguments.",
1040 ci->key);
1041 return (-1);
1042 }
1044 addr = strdup (ci->values[0].value.string);
1045 if (ci->values_num == 2)
1046 port = strdup (ci->values[1].value.string);
1047 else
1048 port = NULL;
1050 if ((addr == NULL) || ((ci->values_num == 2) && (port == NULL)))
1051 {
1052 ERROR ("gmond plugin: strdup failed.");
1053 sfree (addr);
1054 sfree (port);
1055 return (-1);
1056 }
1058 sfree (*ret_addr);
1059 sfree (*ret_port);
1061 *ret_addr = addr;
1062 *ret_port = port;
1064 return (0);
1065 } /* }}} int gmond_config_set_address */
1067 static int gmond_config (oconfig_item_t *ci) /* {{{ */
1068 {
1069 int i;
1071 for (i = 0; i < ci->children_num; i++)
1072 {
1073 oconfig_item_t *child = ci->children + i;
1074 if (strcasecmp ("MCReceiveFrom", child->key) == 0)
1075 gmond_config_set_address (child, &mc_receive_group, &mc_receive_port);
1076 else if (strcasecmp ("Metric", child->key) == 0)
1077 gmond_config_add_metric (child);
1078 else
1079 {
1080 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1081 child->key);
1082 }
1083 }
1085 return (0);
1086 } /* }}} int gmond_config */
1088 static int gmond_init (void) /* {{{ */
1089 {
1090 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
1091 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
1092 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
1093 /* listen = */ 0);
1095 staging_tree = c_avl_create ((void *) strcmp);
1096 if (staging_tree == NULL)
1097 {
1098 ERROR ("gmond plugin: c_avl_create failed.");
1099 return (-1);
1100 }
1102 mc_receive_thread_start ();
1104 return (0);
1105 } /* }}} int gmond_init */
1107 static int gmond_shutdown (void) /* {{{ */
1108 {
1109 size_t i;
1111 mc_receive_thread_stop ();
1113 pthread_mutex_lock (&mc_send_sockets_lock);
1114 for (i = 0; i < mc_send_sockets_num; i++)
1115 {
1116 close (mc_send_sockets[i].fd);
1117 mc_send_sockets[i].fd = -1;
1118 }
1119 sfree (mc_send_sockets);
1120 mc_send_sockets_num = 0;
1121 pthread_mutex_unlock (&mc_send_sockets_lock);
1124 return (0);
1125 } /* }}} int gmond_shutdown */
1127 void module_register (void)
1128 {
1129 plugin_register_complex_config ("gmond", gmond_config);
1130 plugin_register_init ("gmond", gmond_init);
1131 plugin_register_shutdown ("gmond", gmond_shutdown);
1132 }
1134 /* vim: set sw=2 sts=2 et fdm=marker : */