1 /**
2 * collectd - src/gmond.c
3 * Copyright (C) 2009-2015 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 {
415 ssize_t status = sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
416 /* flags = */ 0,
417 (struct sockaddr *) &mc_send_sockets[i].addr,
418 mc_send_sockets[i].addrlen);
419 if (status == -1)
420 {
421 char errbuf[1024];
422 ERROR ("gmond plugin: sendto(2) failed: %s",
423 sstrerror (errno, errbuf, sizeof (errbuf)));
424 continue;
425 }
426 }
427 pthread_mutex_unlock (&mc_send_sockets_lock);
429 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
430 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
431 return (0);
432 } /* }}} int request_meta_data */
434 static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
435 const char *name,
436 const char *type, const char *type_instance,
437 int values_len)
438 {
439 char key[2 * DATA_MAX_NAME_LEN];
440 staging_entry_t *se;
441 int status;
443 if (staging_tree == NULL)
444 return (NULL);
446 ssnprintf (key, sizeof (key), "%s/%s/%s", host, type,
447 (type_instance != NULL) ? type_instance : "");
449 se = NULL;
450 status = c_avl_get (staging_tree, key, (void *) &se);
451 if (status == 0)
452 return (se);
454 /* insert new entry */
455 se = (staging_entry_t *) malloc (sizeof (*se));
456 if (se == NULL)
457 return (NULL);
458 memset (se, 0, sizeof (*se));
460 sstrncpy (se->key, key, sizeof (se->key));
461 se->flags = 0;
463 se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
464 if (se->vl.values == NULL)
465 {
466 sfree (se);
467 return (NULL);
468 }
469 se->vl.values_len = values_len;
471 se->vl.time = 0;
472 se->vl.interval = 0;
473 sstrncpy (se->vl.host, host, sizeof (se->vl.host));
474 sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
475 sstrncpy (se->vl.type, type, sizeof (se->vl.type));
476 if (type_instance != NULL)
477 sstrncpy (se->vl.type_instance, type_instance,
478 sizeof (se->vl.type_instance));
480 status = c_avl_insert (staging_tree, se->key, se);
481 if (status != 0)
482 {
483 ERROR ("gmond plugin: c_avl_insert failed.");
484 sfree (se->vl.values);
485 sfree (se);
486 return (NULL);
487 }
489 return (se);
490 } /* }}} staging_entry_t *staging_entry_get */
492 static int staging_entry_update (const char *host, const char *name, /* {{{ */
493 const char *type, const char *type_instance,
494 int ds_index, int ds_type, value_t value)
495 {
496 const data_set_t *ds;
497 staging_entry_t *se;
499 ds = plugin_get_ds (type);
500 if (ds == NULL)
501 {
502 ERROR ("gmond plugin: Looking up type %s failed.", type);
503 return (-1);
504 }
506 if (ds->ds_num <= ds_index)
507 {
508 ERROR ("gmond plugin: Invalid index %i: %s has only %i data source(s).",
509 ds_index, ds->type, ds->ds_num);
510 return (-1);
511 }
513 pthread_mutex_lock (&staging_lock);
515 se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
516 if (se == NULL)
517 {
518 pthread_mutex_unlock (&staging_lock);
519 ERROR ("gmond plugin: staging_entry_get failed.");
520 return (-1);
521 }
522 if (se->vl.values_len != ds->ds_num)
523 {
524 pthread_mutex_unlock (&staging_lock);
525 return (-1);
526 }
528 if (ds_type == DS_TYPE_COUNTER)
529 se->vl.values[ds_index].counter += value.counter;
530 else if (ds_type == DS_TYPE_GAUGE)
531 se->vl.values[ds_index].gauge = value.gauge;
532 else if (ds_type == DS_TYPE_DERIVE)
533 se->vl.values[ds_index].derive += value.derive;
534 else if (ds_type == DS_TYPE_ABSOLUTE)
535 se->vl.values[ds_index].absolute = value.absolute;
536 else
537 assert (23 == 42);
539 se->flags |= (0x01 << ds_index);
541 /* Check if all data sources have been set. If not, return here. */
542 if (se->flags != ((0x01 << se->vl.values_len) - 1))
543 {
544 pthread_mutex_unlock (&staging_lock);
545 return (0);
546 }
548 /* Check if the interval of this metric is known. If not, request meta data
549 * and return. */
550 if (se->vl.interval == 0)
551 {
552 /* No meta data has been received for this metric yet. */
553 se->flags = 0;
554 pthread_mutex_unlock (&staging_lock);
556 request_meta_data (host, name);
557 return (0);
558 }
560 plugin_dispatch_values (&se->vl);
562 se->flags = 0;
563 pthread_mutex_unlock (&staging_lock);
565 return (0);
566 } /* }}} int staging_entry_update */
568 static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
569 {
570 const char *host;
571 const char *name;
572 metric_map_t *map;
574 value_t value_counter;
575 value_t value_gauge;
576 value_t value_derive;
578 /* Fill in `host', `name', `value_counter', and `value_gauge' according to
579 * the value type, or return with an error. */
580 switch (msg->id) /* {{{ */
581 {
582 case gmetric_uint:
583 {
584 Ganglia_gmetric_uint msg_uint;
586 msg_uint = msg->Ganglia_value_msg_u.gu_int;
588 host = msg_uint.metric_id.host;
589 name = msg_uint.metric_id.name;
590 value_counter.counter = (counter_t) msg_uint.ui;
591 value_gauge.gauge = (gauge_t) msg_uint.ui;
592 value_derive.derive = (derive_t) msg_uint.ui;
593 break;
594 }
596 case gmetric_string:
597 {
598 Ganglia_gmetric_string msg_string;
599 int status;
601 msg_string = msg->Ganglia_value_msg_u.gstr;
603 host = msg_string.metric_id.host;
604 name = msg_string.metric_id.name;
606 status = parse_value (msg_string.str, &value_derive, DS_TYPE_DERIVE);
607 if (status != 0)
608 value_derive.derive = -1;
610 status = parse_value (msg_string.str, &value_gauge, DS_TYPE_GAUGE);
611 if (status != 0)
612 value_gauge.gauge = NAN;
614 status = parse_value (msg_string.str, &value_counter, DS_TYPE_COUNTER);
615 if (status != 0)
616 value_counter.counter = 0;
618 break;
619 }
621 case gmetric_float:
622 {
623 Ganglia_gmetric_float msg_float;
625 msg_float = msg->Ganglia_value_msg_u.gf;
627 host = msg_float.metric_id.host;
628 name = msg_float.metric_id.name;
629 value_counter.counter = (counter_t) msg_float.f;
630 value_gauge.gauge = (gauge_t) msg_float.f;
631 value_derive.derive = (derive_t) msg_float.f;
632 break;
633 }
635 case gmetric_double:
636 {
637 Ganglia_gmetric_double msg_double;
639 msg_double = msg->Ganglia_value_msg_u.gd;
641 host = msg_double.metric_id.host;
642 name = msg_double.metric_id.name;
643 value_counter.counter = (counter_t) msg_double.d;
644 value_gauge.gauge = (gauge_t) msg_double.d;
645 value_derive.derive = (derive_t) msg_double.d;
646 break;
647 }
648 default:
649 DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
650 return (-1);
651 } /* }}} switch (msg->id) */
653 assert (host != NULL);
654 assert (name != NULL);
656 map = metric_lookup (name);
657 if (map != NULL)
658 {
659 value_t val_copy;
661 if ((map->ds_type == DS_TYPE_COUNTER)
662 || (map->ds_type == DS_TYPE_ABSOLUTE))
663 val_copy = value_counter;
664 else if (map->ds_type == DS_TYPE_GAUGE)
665 val_copy = value_gauge;
666 else if (map->ds_type == DS_TYPE_DERIVE)
667 val_copy = value_derive;
668 else
669 assert (23 == 42);
671 return (staging_entry_update (host, name,
672 map->type, map->type_instance,
673 map->ds_index, map->ds_type,
674 val_copy));
675 }
677 DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
678 return (-1);
679 } /* }}} int mc_handle_value_msg */
681 static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
682 {
683 switch (msg->id)
684 {
685 case gmetadata_full:
686 {
687 Ganglia_metadatadef msg_meta;
688 staging_entry_t *se;
689 const data_set_t *ds;
690 metric_map_t *map;
692 msg_meta = msg->Ganglia_metadata_msg_u.gfull;
694 if (msg_meta.metric.tmax <= 0)
695 return (-1);
697 map = metric_lookup (msg_meta.metric_id.name);
698 if (map == NULL)
699 {
700 DEBUG ("gmond plugin: Not handling meta data %s.",
701 msg_meta.metric_id.name);
702 return (0);
703 }
705 ds = plugin_get_ds (map->type);
706 if (ds == NULL)
707 {
708 WARNING ("gmond plugin: Could not find data set %s.", map->type);
709 return (-1);
710 }
712 DEBUG ("gmond plugin: Received meta data for %s/%s.",
713 msg_meta.metric_id.host, msg_meta.metric_id.name);
715 pthread_mutex_lock (&staging_lock);
716 se = staging_entry_get (msg_meta.metric_id.host,
717 msg_meta.metric_id.name,
718 map->type, map->type_instance,
719 ds->ds_num);
720 if (se != NULL)
721 se->vl.interval = TIME_T_TO_CDTIME_T (msg_meta.metric.tmax);
722 pthread_mutex_unlock (&staging_lock);
724 if (se == NULL)
725 {
726 ERROR ("gmond plugin: staging_entry_get failed.");
727 return (-1);
728 }
730 break;
731 }
733 default:
734 {
735 return (-1);
736 }
737 }
739 return (0);
740 } /* }}} int mc_handle_metadata_msg */
742 static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
743 {
744 XDR xdr;
745 Ganglia_msg_formats format;
747 xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
749 xdr_Ganglia_msg_formats (&xdr, &format);
750 xdr_setpos (&xdr, 0);
752 switch (format)
753 {
754 case gmetric_ushort:
755 case gmetric_short:
756 case gmetric_int:
757 case gmetric_uint:
758 case gmetric_string:
759 case gmetric_float:
760 case gmetric_double:
761 {
762 Ganglia_value_msg msg;
764 memset (&msg, 0, sizeof (msg));
765 if (xdr_Ganglia_value_msg (&xdr, &msg))
766 mc_handle_value_msg (&msg);
767 break;
768 }
770 case gmetadata_full:
771 case gmetadata_request:
772 {
773 Ganglia_metadata_msg msg;
774 memset (&msg, 0, sizeof (msg));
775 if (xdr_Ganglia_metadata_msg (&xdr, &msg))
776 mc_handle_metadata_msg (&msg);
777 break;
778 }
780 default:
781 DEBUG ("gmond plugin: Unknown format: %i", format);
782 return (-1);
783 } /* switch (format) */
786 return (0);
787 } /* }}} int mc_handle_metric */
789 static int mc_handle_socket (struct pollfd *p) /* {{{ */
790 {
791 char buffer[BUFF_SIZE];
792 ssize_t buffer_size;
794 if ((p->revents & (POLLIN | POLLPRI)) == 0)
795 {
796 p->revents = 0;
797 return (-1);
798 }
800 buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
801 if (buffer_size <= 0)
802 {
803 char errbuf[1024];
804 ERROR ("gmond plugin: recv failed: %s",
805 sstrerror (errno, errbuf, sizeof (errbuf)));
806 p->revents = 0;
807 return (-1);
808 }
810 mc_handle_metric (buffer, (size_t) buffer_size);
811 return (0);
812 } /* }}} int mc_handle_socket */
814 static void *mc_receive_thread (void *arg) /* {{{ */
815 {
816 socket_entry_t *mc_receive_socket_entries;
817 int status;
818 size_t i;
820 mc_receive_socket_entries = NULL;
821 status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
822 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
823 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
824 /* listen = */ 1);
825 if (status != 0)
826 {
827 ERROR ("gmond plugin: create_sockets failed.");
828 return ((void *) -1);
829 }
831 mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
832 sizeof (*mc_receive_sockets));
833 if (mc_receive_sockets == NULL)
834 {
835 ERROR ("gmond plugin: calloc failed.");
836 for (i = 0; i < mc_receive_sockets_num; i++)
837 close (mc_receive_socket_entries[i].fd);
838 free (mc_receive_socket_entries);
839 mc_receive_socket_entries = NULL;
840 mc_receive_sockets_num = 0;
841 return ((void *) -1);
842 }
844 for (i = 0; i < mc_receive_sockets_num; i++)
845 {
846 mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
847 mc_receive_sockets[i].events = POLLIN | POLLPRI;
848 mc_receive_sockets[i].revents = 0;
849 }
851 while (mc_receive_thread_loop != 0)
852 {
853 status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
854 if (status <= 0)
855 {
856 char errbuf[1024];
857 if (errno == EINTR)
858 continue;
859 ERROR ("gmond plugin: poll failed: %s",
860 sstrerror (errno, errbuf, sizeof (errbuf)));
861 break;
862 }
864 for (i = 0; i < mc_receive_sockets_num; i++)
865 {
866 if (mc_receive_sockets[i].revents != 0)
867 mc_handle_socket (mc_receive_sockets + i);
868 }
869 } /* while (mc_receive_thread_loop != 0) */
871 free (mc_receive_socket_entries);
872 return ((void *) 0);
873 } /* }}} void *mc_receive_thread */
875 static int mc_receive_thread_start (void) /* {{{ */
876 {
877 int status;
879 if (mc_receive_thread_running != 0)
880 return (-1);
882 mc_receive_thread_loop = 1;
884 status = plugin_thread_create (&mc_receive_thread_id, /* attr = */ NULL,
885 mc_receive_thread, /* args = */ NULL);
886 if (status != 0)
887 {
888 ERROR ("gmond plugin: Starting receive thread failed.");
889 mc_receive_thread_loop = 0;
890 return (-1);
891 }
893 mc_receive_thread_running = 1;
894 return (0);
895 } /* }}} int start_receive_thread */
897 static int mc_receive_thread_stop (void) /* {{{ */
898 {
899 if (mc_receive_thread_running == 0)
900 return (-1);
902 mc_receive_thread_loop = 0;
904 INFO ("gmond plugin: Stopping receive thread.");
905 pthread_kill (mc_receive_thread_id, SIGTERM);
906 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
907 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
909 mc_receive_thread_running = 0;
911 return (0);
912 } /* }}} int mc_receive_thread_stop */
914 /*
915 * Config:
916 *
917 * <Plugin gmond>
918 * MCReceiveFrom "239.2.11.71" "8649"
919 * <Metric "load_one">
920 * Type "load"
921 * [TypeInstance "foo"]
922 * [DataSource "bar"]
923 * </Metric>
924 * </Plugin>
925 */
926 static int gmond_config_set_string (oconfig_item_t *ci, char **str) /* {{{ */
927 {
928 char *tmp;
930 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
931 {
932 WARNING ("gmond plugin: The `%s' option needs "
933 "exactly one string argument.", ci->key);
934 return (-1);
935 }
937 tmp = strdup (ci->values[0].value.string);
938 if (tmp == NULL)
939 {
940 ERROR ("gmond plugin: strdup failed.");
941 return (-1);
942 }
944 sfree (*str);
945 *str = tmp;
946 return (0);
947 } /* }}} int gmond_config_set_string */
949 static int gmond_config_add_metric (oconfig_item_t *ci) /* {{{ */
950 {
951 metric_map_t *map;
952 int i;
954 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
955 {
956 WARNING ("gmond plugin: `Metric' blocks need "
957 "exactly one string argument.");
958 return (-1);
959 }
961 map = realloc (metric_map, (metric_map_len + 1) * sizeof (*metric_map));
962 if (map == NULL)
963 {
964 ERROR ("gmond plugin: realloc failed.");
965 return (-1);
966 }
967 metric_map = map;
968 map = metric_map + metric_map_len;
970 memset (map, 0, sizeof (*map));
971 map->type = NULL;
972 map->type_instance = NULL;
973 map->ds_name = NULL;
974 map->ds_type = -1;
975 map->ds_index = -1;
977 map->ganglia_name = strdup (ci->values[0].value.string);
978 if (map->ganglia_name == NULL)
979 {
980 ERROR ("gmond plugin: strdup failed.");
981 return (-1);
982 }
984 for (i = 0; i < ci->children_num; i++)
985 {
986 oconfig_item_t *child = ci->children + i;
987 if (strcasecmp ("Type", child->key) == 0)
988 gmond_config_set_string (child, &map->type);
989 else if (strcasecmp ("TypeInstance", child->key) == 0)
990 gmond_config_set_string (child, &map->type_instance);
991 else if (strcasecmp ("DataSource", child->key) == 0)
992 gmond_config_set_string (child, &map->ds_name);
993 else
994 {
995 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
996 child->key);
997 }
998 }
1000 if (map->type == NULL)
1001 {
1002 ERROR ("gmond plugin: No type is set for metric %s.",
1003 map->ganglia_name);
1004 sfree (map->ganglia_name);
1005 sfree (map->type_instance);
1006 return (-1);
1007 }
1009 metric_map_len++;
1010 return (0);
1011 } /* }}} int gmond_config_add_metric */
1013 static int gmond_config_set_address (oconfig_item_t *ci, /* {{{ */
1014 char **ret_addr, char **ret_port)
1015 {
1016 char *addr;
1017 char *port;
1019 if ((ci->values_num != 1) && (ci->values_num != 2))
1020 {
1021 WARNING ("gmond plugin: The `%s' config option needs "
1022 "one or two string arguments.",
1023 ci->key);
1024 return (-1);
1025 }
1026 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
1027 || ((ci->values_num == 2)
1028 && (ci->values[1].type != OCONFIG_TYPE_STRING)))
1029 {
1030 WARNING ("gmond plugin: The `%s' config option needs "
1031 "one or two string arguments.",
1032 ci->key);
1033 return (-1);
1034 }
1036 addr = strdup (ci->values[0].value.string);
1037 if (ci->values_num == 2)
1038 port = strdup (ci->values[1].value.string);
1039 else
1040 port = NULL;
1042 if ((addr == NULL) || ((ci->values_num == 2) && (port == NULL)))
1043 {
1044 ERROR ("gmond plugin: strdup failed.");
1045 sfree (addr);
1046 sfree (port);
1047 return (-1);
1048 }
1050 sfree (*ret_addr);
1051 sfree (*ret_port);
1053 *ret_addr = addr;
1054 *ret_port = port;
1056 return (0);
1057 } /* }}} int gmond_config_set_address */
1059 static int gmond_config (oconfig_item_t *ci) /* {{{ */
1060 {
1061 int i;
1063 for (i = 0; i < ci->children_num; i++)
1064 {
1065 oconfig_item_t *child = ci->children + i;
1066 if (strcasecmp ("MCReceiveFrom", child->key) == 0)
1067 gmond_config_set_address (child, &mc_receive_group, &mc_receive_port);
1068 else if (strcasecmp ("Metric", child->key) == 0)
1069 gmond_config_add_metric (child);
1070 else
1071 {
1072 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1073 child->key);
1074 }
1075 }
1077 return (0);
1078 } /* }}} int gmond_config */
1080 static int gmond_init (void) /* {{{ */
1081 {
1082 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
1083 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
1084 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
1085 /* listen = */ 0);
1087 staging_tree = c_avl_create ((void *) strcmp);
1088 if (staging_tree == NULL)
1089 {
1090 ERROR ("gmond plugin: c_avl_create failed.");
1091 return (-1);
1092 }
1094 mc_receive_thread_start ();
1096 return (0);
1097 } /* }}} int gmond_init */
1099 static int gmond_shutdown (void) /* {{{ */
1100 {
1101 size_t i;
1103 mc_receive_thread_stop ();
1105 pthread_mutex_lock (&mc_send_sockets_lock);
1106 for (i = 0; i < mc_send_sockets_num; i++)
1107 {
1108 close (mc_send_sockets[i].fd);
1109 mc_send_sockets[i].fd = -1;
1110 }
1111 sfree (mc_send_sockets);
1112 mc_send_sockets_num = 0;
1113 pthread_mutex_unlock (&mc_send_sockets_lock);
1116 return (0);
1117 } /* }}} int gmond_shutdown */
1119 void module_register (void)
1120 {
1121 plugin_register_complex_config ("gmond", gmond_config);
1122 plugin_register_init ("gmond", gmond_init);
1123 plugin_register_shutdown ("gmond", gmond_shutdown);
1124 }
1126 /* vim: set sw=2 sts=2 et fdm=marker : */