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 setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
290 (void *) &yes, sizeof (yes));
291 }
293 status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
294 if (status != 0)
295 {
296 char errbuf[1024];
297 ERROR ("gmond plugin: bind failed: %s",
298 sstrerror (errno, errbuf, sizeof (errbuf)));
299 close (sockets[sockets_num].fd);
300 continue;
301 }
303 if (ai_ptr->ai_family == AF_INET)
304 {
305 struct sockaddr_in *addr;
306 struct ip_mreq mreq;
307 int loop;
309 addr = (struct sockaddr_in *) ai_ptr->ai_addr;
311 if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
312 {
313 sockets_num++;
314 continue;
315 }
317 loop = 1;
318 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
319 (void *) &loop, sizeof (loop));
321 memset (&mreq, 0, sizeof (mreq));
322 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
323 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
324 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
325 (void *) &mreq, sizeof (mreq));
326 } /* if (ai_ptr->ai_family == AF_INET) */
327 else if (ai_ptr->ai_family == AF_INET6)
328 {
329 struct sockaddr_in6 *addr;
330 struct ipv6_mreq mreq;
331 int loop;
333 addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
335 if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
336 {
337 sockets_num++;
338 continue;
339 }
341 loop = 1;
342 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
343 (void *) &loop, sizeof (loop));
345 memset (&mreq, 0, sizeof (mreq));
346 memcpy (&mreq.ipv6mr_multiaddr,
347 &addr->sin6_addr, sizeof (addr->sin6_addr));
348 mreq.ipv6mr_interface = 0; /* any */
349 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
350 (void *) &mreq, sizeof (mreq));
351 } /* if (ai_ptr->ai_family == AF_INET6) */
353 sockets_num++;
354 } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
356 freeaddrinfo (ai_list);
358 if (sockets_num == 0)
359 {
360 sfree (sockets);
361 return (-1);
362 }
364 *ret_sockets = sockets;
365 *ret_sockets_num = sockets_num;
366 return (0);
367 } /* }}} int create_sockets */
369 static int request_meta_data (const char *host, const char *name) /* {{{ */
370 {
371 Ganglia_metadata_msg msg;
372 char buffer[BUFF_SIZE];
373 unsigned int buffer_size;
374 XDR xdr;
375 size_t i;
377 memset (&msg, 0, sizeof (msg));
379 msg.id = gmetadata_request;
380 msg.Ganglia_metadata_msg_u.grequest.metric_id.host = strdup (host);
381 msg.Ganglia_metadata_msg_u.grequest.metric_id.name = strdup (name);
383 if ((msg.Ganglia_metadata_msg_u.grequest.metric_id.host == NULL)
384 || (msg.Ganglia_metadata_msg_u.grequest.metric_id.name == NULL))
385 {
386 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
387 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
388 return (-1);
389 }
391 memset (buffer, 0, sizeof (buffer));
392 xdrmem_create (&xdr, buffer, sizeof (buffer), XDR_ENCODE);
394 if (!xdr_Ganglia_metadata_msg (&xdr, &msg))
395 {
396 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
397 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
398 return (-1);
399 }
401 buffer_size = xdr_getpos (&xdr);
403 DEBUG ("gmond plugin: Requesting meta data for %s/%s.",
404 host, name);
406 pthread_mutex_lock (&mc_send_sockets_lock);
407 for (i = 0; i < mc_send_sockets_num; i++)
408 sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
409 /* flags = */ 0,
410 (struct sockaddr *) &mc_send_sockets[i].addr,
411 mc_send_sockets[i].addrlen);
412 pthread_mutex_unlock (&mc_send_sockets_lock);
414 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
415 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
416 return (0);
417 } /* }}} int request_meta_data */
419 static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
420 const char *name,
421 const char *type, const char *type_instance,
422 int values_len)
423 {
424 char key[2 * DATA_MAX_NAME_LEN];
425 staging_entry_t *se;
426 int status;
428 if (staging_tree == NULL)
429 return (NULL);
431 ssnprintf (key, sizeof (key), "%s/%s/%s", host, type,
432 (type_instance != NULL) ? type_instance : "");
434 se = NULL;
435 status = c_avl_get (staging_tree, key, (void *) &se);
436 if (status == 0)
437 return (se);
439 /* insert new entry */
440 se = (staging_entry_t *) malloc (sizeof (*se));
441 if (se == NULL)
442 return (NULL);
443 memset (se, 0, sizeof (*se));
445 sstrncpy (se->key, key, sizeof (se->key));
446 se->flags = 0;
448 se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
449 if (se->vl.values == NULL)
450 {
451 sfree (se);
452 return (NULL);
453 }
454 se->vl.values_len = values_len;
456 se->vl.time = 0;
457 se->vl.interval = 0;
458 sstrncpy (se->vl.host, host, sizeof (se->vl.host));
459 sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
460 sstrncpy (se->vl.type, type, sizeof (se->vl.type));
461 if (type_instance != NULL)
462 sstrncpy (se->vl.type_instance, type_instance,
463 sizeof (se->vl.type_instance));
465 status = c_avl_insert (staging_tree, se->key, se);
466 if (status != 0)
467 {
468 ERROR ("gmond plugin: c_avl_insert failed.");
469 sfree (se->vl.values);
470 sfree (se);
471 return (NULL);
472 }
474 return (se);
475 } /* }}} staging_entry_t *staging_entry_get */
477 static int staging_entry_submit (const char *host, const char *name, /* {{{ */
478 staging_entry_t *se)
479 {
480 value_list_t vl;
481 value_t values[se->vl.values_len];
483 if (se->vl.interval == 0)
484 {
485 /* No meta data has been received for this metric yet. */
486 se->flags = 0;
487 pthread_mutex_unlock (&staging_lock);
488 request_meta_data (host, name);
489 return (0);
490 }
492 se->flags = 0;
494 memcpy (values, se->vl.values, sizeof (values));
495 memcpy (&vl, &se->vl, sizeof (vl));
497 /* Unlock before calling `plugin_dispatch_values'.. */
498 pthread_mutex_unlock (&staging_lock);
500 vl.values = values;
502 plugin_dispatch_values (&vl);
504 return (0);
505 } /* }}} int staging_entry_submit */
507 static int staging_entry_update (const char *host, const char *name, /* {{{ */
508 const char *type, const char *type_instance,
509 int ds_index, int ds_type, value_t value)
510 {
511 const data_set_t *ds;
512 staging_entry_t *se;
514 ds = plugin_get_ds (type);
515 if (ds == NULL)
516 {
517 ERROR ("gmond plugin: Looking up type %s failed.", type);
518 return (-1);
519 }
521 if (ds->ds_num <= ds_index)
522 {
523 ERROR ("gmond plugin: Invalid index %i: %s has only %i data source(s).",
524 ds_index, ds->type, ds->ds_num);
525 return (-1);
526 }
528 pthread_mutex_lock (&staging_lock);
530 se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
531 if (se == NULL)
532 {
533 pthread_mutex_unlock (&staging_lock);
534 ERROR ("gmond plugin: staging_entry_get failed.");
535 return (-1);
536 }
537 if (se->vl.values_len != ds->ds_num)
538 {
539 pthread_mutex_unlock (&staging_lock);
540 return (-1);
541 }
543 if (ds_type == DS_TYPE_COUNTER)
544 se->vl.values[ds_index].counter += value.counter;
545 else if (ds_type == DS_TYPE_GAUGE)
546 se->vl.values[ds_index].gauge = value.gauge;
547 else if (ds_type == DS_TYPE_DERIVE)
548 se->vl.values[ds_index].derive += value.derive;
549 else if (ds_type == DS_TYPE_ABSOLUTE)
550 se->vl.values[ds_index].absolute = value.absolute;
551 else
552 assert (23 == 42);
554 se->flags |= (0x01 << ds_index);
556 /* Check if all values have been set and submit if so. */
557 if (se->flags == ((0x01 << se->vl.values_len) - 1))
558 {
559 /* `staging_lock' is unlocked in `staging_entry_submit'. */
560 staging_entry_submit (host, name, se);
561 }
562 else
563 {
564 pthread_mutex_unlock (&staging_lock);
565 }
567 return (0);
568 } /* }}} int staging_entry_update */
570 static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
571 {
572 const char *host;
573 const char *name;
574 metric_map_t *map;
576 value_t value_counter;
577 value_t value_gauge;
578 value_t value_derive;
580 /* Fill in `host', `name', `value_counter', and `value_gauge' according to
581 * the value type, or return with an error. */
582 switch (msg->id) /* {{{ */
583 {
584 case gmetric_uint:
585 {
586 Ganglia_gmetric_uint msg_uint;
588 msg_uint = msg->Ganglia_value_msg_u.gu_int;
590 host = msg_uint.metric_id.host;
591 name = msg_uint.metric_id.name;
592 value_counter.counter = (counter_t) msg_uint.ui;
593 value_gauge.gauge = (gauge_t) msg_uint.ui;
594 value_derive.derive = (derive_t) msg_uint.ui;
595 break;
596 }
598 case gmetric_string:
599 {
600 Ganglia_gmetric_string msg_string;
601 int status;
603 msg_string = msg->Ganglia_value_msg_u.gstr;
605 host = msg_string.metric_id.host;
606 name = msg_string.metric_id.name;
608 status = parse_value (msg_string.str, &value_derive, DS_TYPE_DERIVE);
609 if (status != 0)
610 value_derive.derive = -1;
612 status = parse_value (msg_string.str, &value_gauge, DS_TYPE_GAUGE);
613 if (status != 0)
614 value_gauge.gauge = NAN;
616 status = parse_value (msg_string.str, &value_counter, DS_TYPE_COUNTER);
617 if (status != 0)
618 value_counter.counter = 0;
620 break;
621 }
623 case gmetric_float:
624 {
625 Ganglia_gmetric_float msg_float;
627 msg_float = msg->Ganglia_value_msg_u.gf;
629 host = msg_float.metric_id.host;
630 name = msg_float.metric_id.name;
631 value_counter.counter = (counter_t) msg_float.f;
632 value_gauge.gauge = (gauge_t) msg_float.f;
633 value_derive.derive = (derive_t) msg_float.f;
634 break;
635 }
637 case gmetric_double:
638 {
639 Ganglia_gmetric_double msg_double;
641 msg_double = msg->Ganglia_value_msg_u.gd;
643 host = msg_double.metric_id.host;
644 name = msg_double.metric_id.name;
645 value_counter.counter = (counter_t) msg_double.d;
646 value_gauge.gauge = (gauge_t) msg_double.d;
647 value_derive.derive = (derive_t) msg_double.d;
648 break;
649 }
650 default:
651 DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
652 return (-1);
653 } /* }}} switch (msg->id) */
655 assert (host != NULL);
656 assert (name != NULL);
658 map = metric_lookup (name);
659 if (map != NULL)
660 {
661 value_t val_copy;
663 if ((map->ds_type == DS_TYPE_COUNTER)
664 || (map->ds_type == DS_TYPE_ABSOLUTE))
665 val_copy = value_counter;
666 else if (map->ds_type == DS_TYPE_GAUGE)
667 val_copy = value_gauge;
668 else if (map->ds_type == DS_TYPE_DERIVE)
669 val_copy = value_derive;
670 else
671 assert (23 == 42);
673 return (staging_entry_update (host, name,
674 map->type, map->type_instance,
675 map->ds_index, map->ds_type,
676 val_copy));
677 }
679 DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
680 return (-1);
681 } /* }}} int mc_handle_value_msg */
683 static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
684 {
685 switch (msg->id)
686 {
687 case gmetadata_full:
688 {
689 Ganglia_metadatadef msg_meta;
690 staging_entry_t *se;
691 const data_set_t *ds;
692 metric_map_t *map;
694 msg_meta = msg->Ganglia_metadata_msg_u.gfull;
696 if (msg_meta.metric.tmax <= 0)
697 return (-1);
699 map = metric_lookup (msg_meta.metric_id.name);
700 if (map == NULL)
701 {
702 DEBUG ("gmond plugin: Not handling meta data %s.",
703 msg_meta.metric_id.name);
704 return (0);
705 }
707 ds = plugin_get_ds (map->type);
708 if (ds == NULL)
709 {
710 WARNING ("gmond plugin: Could not find data set %s.", map->type);
711 return (-1);
712 }
714 DEBUG ("gmond plugin: Received meta data for %s/%s.",
715 msg_meta.metric_id.host, msg_meta.metric_id.name);
717 pthread_mutex_lock (&staging_lock);
718 se = staging_entry_get (msg_meta.metric_id.host,
719 msg_meta.metric_id.name,
720 map->type, map->type_instance,
721 ds->ds_num);
722 if (se != NULL)
723 se->vl.interval = TIME_T_TO_CDTIME_T (msg_meta.metric.tmax);
724 pthread_mutex_unlock (&staging_lock);
726 if (se == NULL)
727 {
728 ERROR ("gmond plugin: staging_entry_get failed.");
729 return (-1);
730 }
732 break;
733 }
735 default:
736 {
737 return (-1);
738 }
739 }
741 return (0);
742 } /* }}} int mc_handle_metadata_msg */
744 static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
745 {
746 XDR xdr;
747 Ganglia_msg_formats format;
749 xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
751 xdr_Ganglia_msg_formats (&xdr, &format);
752 xdr_setpos (&xdr, 0);
754 switch (format)
755 {
756 case gmetric_ushort:
757 case gmetric_short:
758 case gmetric_int:
759 case gmetric_uint:
760 case gmetric_string:
761 case gmetric_float:
762 case gmetric_double:
763 {
764 Ganglia_value_msg msg;
766 memset (&msg, 0, sizeof (msg));
767 if (xdr_Ganglia_value_msg (&xdr, &msg))
768 mc_handle_value_msg (&msg);
769 break;
770 }
772 case gmetadata_full:
773 case gmetadata_request:
774 {
775 Ganglia_metadata_msg msg;
776 memset (&msg, 0, sizeof (msg));
777 if (xdr_Ganglia_metadata_msg (&xdr, &msg))
778 mc_handle_metadata_msg (&msg);
779 break;
780 }
782 default:
783 DEBUG ("gmond plugin: Unknown format: %i", format);
784 return (-1);
785 } /* switch (format) */
788 return (0);
789 } /* }}} int mc_handle_metric */
791 static int mc_handle_socket (struct pollfd *p) /* {{{ */
792 {
793 char buffer[BUFF_SIZE];
794 ssize_t buffer_size;
796 if ((p->revents & (POLLIN | POLLPRI)) == 0)
797 {
798 p->revents = 0;
799 return (-1);
800 }
802 buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
803 if (buffer_size <= 0)
804 {
805 char errbuf[1024];
806 ERROR ("gmond plugin: recv failed: %s",
807 sstrerror (errno, errbuf, sizeof (errbuf)));
808 p->revents = 0;
809 return (-1);
810 }
812 mc_handle_metric (buffer, (size_t) buffer_size);
813 return (0);
814 } /* }}} int mc_handle_socket */
816 static void *mc_receive_thread (void *arg) /* {{{ */
817 {
818 socket_entry_t *mc_receive_socket_entries;
819 int status;
820 size_t i;
822 mc_receive_socket_entries = NULL;
823 status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
824 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
825 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
826 /* listen = */ 1);
827 if (status != 0)
828 {
829 ERROR ("gmond plugin: create_sockets failed.");
830 return ((void *) -1);
831 }
833 mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
834 sizeof (*mc_receive_sockets));
835 if (mc_receive_sockets == NULL)
836 {
837 ERROR ("gmond plugin: calloc failed.");
838 for (i = 0; i < mc_receive_sockets_num; i++)
839 close (mc_receive_socket_entries[i].fd);
840 free (mc_receive_socket_entries);
841 mc_receive_socket_entries = NULL;
842 mc_receive_sockets_num = 0;
843 return ((void *) -1);
844 }
846 for (i = 0; i < mc_receive_sockets_num; i++)
847 {
848 mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
849 mc_receive_sockets[i].events = POLLIN | POLLPRI;
850 mc_receive_sockets[i].revents = 0;
851 }
853 while (mc_receive_thread_loop != 0)
854 {
855 status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
856 if (status <= 0)
857 {
858 char errbuf[1024];
859 if (errno == EINTR)
860 continue;
861 ERROR ("gmond plugin: poll failed: %s",
862 sstrerror (errno, errbuf, sizeof (errbuf)));
863 break;
864 }
866 for (i = 0; i < mc_receive_sockets_num; i++)
867 {
868 if (mc_receive_sockets[i].revents != 0)
869 mc_handle_socket (mc_receive_sockets + i);
870 }
871 } /* while (mc_receive_thread_loop != 0) */
873 free (mc_receive_socket_entries);
874 return ((void *) 0);
875 } /* }}} void *mc_receive_thread */
877 static int mc_receive_thread_start (void) /* {{{ */
878 {
879 int status;
881 if (mc_receive_thread_running != 0)
882 return (-1);
884 mc_receive_thread_loop = 1;
886 status = plugin_thread_create (&mc_receive_thread_id, /* attr = */ NULL,
887 mc_receive_thread, /* args = */ NULL);
888 if (status != 0)
889 {
890 ERROR ("gmond plugin: Starting receive thread failed.");
891 mc_receive_thread_loop = 0;
892 return (-1);
893 }
895 mc_receive_thread_running = 1;
896 return (0);
897 } /* }}} int start_receive_thread */
899 static int mc_receive_thread_stop (void) /* {{{ */
900 {
901 if (mc_receive_thread_running == 0)
902 return (-1);
904 mc_receive_thread_loop = 0;
906 INFO ("gmond plugin: Stopping receive thread.");
907 pthread_kill (mc_receive_thread_id, SIGTERM);
908 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
909 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
911 mc_receive_thread_running = 0;
913 return (0);
914 } /* }}} int mc_receive_thread_stop */
916 /*
917 * Config:
918 *
919 * <Plugin gmond>
920 * MCReceiveFrom "239.2.11.71" "8649"
921 * <Metric "load_one">
922 * Type "load"
923 * [TypeInstance "foo"]
924 * [DataSource "bar"]
925 * </Metric>
926 * </Plugin>
927 */
928 static int gmond_config_set_string (oconfig_item_t *ci, char **str) /* {{{ */
929 {
930 char *tmp;
932 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
933 {
934 WARNING ("gmond plugin: The `%s' option needs "
935 "exactly one string argument.", ci->key);
936 return (-1);
937 }
939 tmp = strdup (ci->values[0].value.string);
940 if (tmp == NULL)
941 {
942 ERROR ("gmond plugin: strdup failed.");
943 return (-1);
944 }
946 sfree (*str);
947 *str = tmp;
948 return (0);
949 } /* }}} int gmond_config_set_string */
951 static int gmond_config_add_metric (oconfig_item_t *ci) /* {{{ */
952 {
953 metric_map_t *map;
954 int i;
956 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
957 {
958 WARNING ("gmond plugin: `Metric' blocks need "
959 "exactly one string argument.");
960 return (-1);
961 }
963 map = realloc (metric_map, (metric_map_len + 1) * sizeof (*metric_map));
964 if (map == NULL)
965 {
966 ERROR ("gmond plugin: realloc failed.");
967 return (-1);
968 }
969 metric_map = map;
970 map = metric_map + metric_map_len;
972 memset (map, 0, sizeof (*map));
973 map->type = NULL;
974 map->type_instance = NULL;
975 map->ds_name = NULL;
976 map->ds_type = -1;
977 map->ds_index = -1;
979 map->ganglia_name = strdup (ci->values[0].value.string);
980 if (map->ganglia_name == NULL)
981 {
982 ERROR ("gmond plugin: strdup failed.");
983 return (-1);
984 }
986 for (i = 0; i < ci->children_num; i++)
987 {
988 oconfig_item_t *child = ci->children + i;
989 if (strcasecmp ("Type", child->key) == 0)
990 gmond_config_set_string (child, &map->type);
991 else if (strcasecmp ("TypeInstance", child->key) == 0)
992 gmond_config_set_string (child, &map->type_instance);
993 else if (strcasecmp ("DataSource", child->key) == 0)
994 gmond_config_set_string (child, &map->ds_name);
995 else
996 {
997 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
998 child->key);
999 }
1000 }
1002 if (map->type == NULL)
1003 {
1004 ERROR ("gmond plugin: No type is set for metric %s.",
1005 map->ganglia_name);
1006 sfree (map->ganglia_name);
1007 sfree (map->type_instance);
1008 return (-1);
1009 }
1011 metric_map_len++;
1012 return (0);
1013 } /* }}} int gmond_config_add_metric */
1015 static int gmond_config_set_address (oconfig_item_t *ci, /* {{{ */
1016 char **ret_addr, char **ret_port)
1017 {
1018 char *addr;
1019 char *port;
1021 if ((ci->values_num != 1) && (ci->values_num != 2))
1022 {
1023 WARNING ("gmond plugin: The `%s' config option needs "
1024 "one or two string arguments.",
1025 ci->key);
1026 return (-1);
1027 }
1028 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
1029 || ((ci->values_num == 2)
1030 && (ci->values[1].type != OCONFIG_TYPE_STRING)))
1031 {
1032 WARNING ("gmond plugin: The `%s' config option needs "
1033 "one or two string arguments.",
1034 ci->key);
1035 return (-1);
1036 }
1038 addr = strdup (ci->values[0].value.string);
1039 if (ci->values_num == 2)
1040 port = strdup (ci->values[1].value.string);
1041 else
1042 port = NULL;
1044 if ((addr == NULL) || ((ci->values_num == 2) && (port == NULL)))
1045 {
1046 ERROR ("gmond plugin: strdup failed.");
1047 sfree (addr);
1048 sfree (port);
1049 return (-1);
1050 }
1052 sfree (*ret_addr);
1053 sfree (*ret_port);
1055 *ret_addr = addr;
1056 *ret_port = port;
1058 return (0);
1059 } /* }}} int gmond_config_set_address */
1061 static int gmond_config (oconfig_item_t *ci) /* {{{ */
1062 {
1063 int i;
1065 for (i = 0; i < ci->children_num; i++)
1066 {
1067 oconfig_item_t *child = ci->children + i;
1068 if (strcasecmp ("MCReceiveFrom", child->key) == 0)
1069 gmond_config_set_address (child, &mc_receive_group, &mc_receive_port);
1070 else if (strcasecmp ("Metric", child->key) == 0)
1071 gmond_config_add_metric (child);
1072 else
1073 {
1074 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1075 child->key);
1076 }
1077 }
1079 return (0);
1080 } /* }}} int gmond_config */
1082 static int gmond_init (void) /* {{{ */
1083 {
1084 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
1085 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
1086 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
1087 /* listen = */ 0);
1089 staging_tree = c_avl_create ((void *) strcmp);
1090 if (staging_tree == NULL)
1091 {
1092 ERROR ("gmond plugin: c_avl_create failed.");
1093 return (-1);
1094 }
1096 mc_receive_thread_start ();
1098 return (0);
1099 } /* }}} int gmond_init */
1101 static int gmond_shutdown (void) /* {{{ */
1102 {
1103 size_t i;
1105 mc_receive_thread_stop ();
1107 pthread_mutex_lock (&mc_send_sockets_lock);
1108 for (i = 0; i < mc_send_sockets_num; i++)
1109 {
1110 close (mc_send_sockets[i].fd);
1111 mc_send_sockets[i].fd = -1;
1112 }
1113 sfree (mc_send_sockets);
1114 mc_send_sockets_num = 0;
1115 pthread_mutex_unlock (&mc_send_sockets_lock);
1118 return (0);
1119 } /* }}} int gmond_shutdown */
1121 void module_register (void)
1122 {
1123 plugin_register_complex_config ("gmond", gmond_config);
1124 plugin_register_init ("gmond", gmond_init);
1125 plugin_register_shutdown ("gmond", gmond_shutdown);
1126 }
1128 /* vim: set sw=2 sts=2 et fdm=marker : */