1 /**
2 * collectd - src/gmond.c
3 * Copyright (C) 2009,2010 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_NETDB_H
37 # include <netdb.h>
38 #endif
39 #if HAVE_NETINET_IN_H
40 # include <netinet/in.h>
41 #endif
42 #if HAVE_ARPA_INET_H
43 # include <arpa/inet.h>
44 #endif
45 #if HAVE_POLL_H
46 # include <poll.h>
47 #endif
49 #include <gm_protocol.h>
51 #ifndef IPV6_ADD_MEMBERSHIP
52 # ifdef IPV6_JOIN_GROUP
53 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
54 # else
55 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
56 # endif
57 #endif /* !IP_ADD_MEMBERSHIP */
59 #ifdef GANGLIA_MAX_MESSAGE_LEN
60 # define BUFF_SIZE GANGLIA_MAX_MESSAGE_LEN
61 #else
62 # define BUFF_SIZE 1400
63 #endif
65 struct socket_entry_s
66 {
67 int fd;
68 struct sockaddr_storage addr;
69 socklen_t addrlen;
70 };
71 typedef struct socket_entry_s socket_entry_t;
73 struct staging_entry_s
74 {
75 char key[2 * DATA_MAX_NAME_LEN];
76 value_list_t vl;
77 int flags;
78 };
79 typedef struct staging_entry_s staging_entry_t;
81 struct metric_map_s
82 {
83 char *ganglia_name;
84 char *type;
85 char *type_instance;
86 char *ds_name;
87 int ds_type;
88 size_t ds_index;
89 };
90 typedef struct metric_map_s metric_map_t;
92 #define MC_RECEIVE_GROUP_DEFAULT "239.2.11.71"
93 static char *mc_receive_group = NULL;
94 #define MC_RECEIVE_PORT_DEFAULT "8649"
95 static char *mc_receive_port = NULL;
97 static struct pollfd *mc_receive_sockets = NULL;
98 static size_t mc_receive_sockets_num = 0;
100 static socket_entry_t *mc_send_sockets = NULL;
101 static size_t mc_send_sockets_num = 0;
102 static pthread_mutex_t mc_send_sockets_lock = PTHREAD_MUTEX_INITIALIZER;
104 static int mc_receive_thread_loop = 0;
105 static int mc_receive_thread_running = 0;
106 static pthread_t mc_receive_thread_id;
108 static metric_map_t metric_map_default[] =
109 { /*---------------+-------------+-----------+-------------+------+-----*
110 * ganglia_name ! type ! type_inst ! data_source ! type ! idx *
111 *---------------+-------------+-----------+-------------+------+-----*/
112 { "load_one", "load", "", "shortterm", -1, -1 },
113 { "load_five", "load", "", "midterm", -1, -1 },
114 { "load_fifteen", "load", "", "longterm", -1, -1 },
115 { "cpu_user", "cpu", "user", "value", -1, -1 },
116 { "cpu_system", "cpu", "system", "value", -1, -1 },
117 { "cpu_idle", "cpu", "idle", "value", -1, -1 },
118 { "cpu_nice", "cpu", "nice", "value", -1, -1 },
119 { "cpu_wio", "cpu", "wait", "value", -1, -1 },
120 { "mem_free", "memory", "free", "value", -1, -1 },
121 { "mem_shared", "memory", "shared", "value", -1, -1 },
122 { "mem_buffers", "memory", "buffered", "value", -1, -1 },
123 { "mem_cached", "memory", "cached", "value", -1, -1 },
124 { "mem_total", "memory", "total", "value", -1, -1 },
125 { "bytes_in", "if_octets", "", "rx", -1, -1 },
126 { "bytes_out", "if_octets", "", "tx", -1, -1 },
127 { "pkts_in", "if_packets", "", "rx", -1, -1 },
128 { "pkts_out", "if_packets", "", "tx", -1, -1 }
129 };
130 static size_t metric_map_len_default = STATIC_ARRAY_SIZE (metric_map_default);
132 static metric_map_t *metric_map = NULL;
133 static size_t metric_map_len = 0;
135 static c_avl_tree_t *staging_tree;
136 static pthread_mutex_t staging_lock = PTHREAD_MUTEX_INITIALIZER;
138 static metric_map_t *metric_lookup (const char *key) /* {{{ */
139 {
140 metric_map_t *map;
141 size_t map_len;
142 size_t i;
144 /* Search the user-supplied table first.. */
145 map = metric_map;
146 map_len = metric_map_len;
147 for (i = 0; i < map_len; i++)
148 if (strcmp (map[i].ganglia_name, key) == 0)
149 break;
151 /* .. and fall back to the built-in table if nothing is found. */
152 if (i >= map_len)
153 {
154 map = metric_map_default;
155 map_len = metric_map_len_default;
157 for (i = 0; i < map_len; i++)
158 if (strcmp (map[i].ganglia_name, key) == 0)
159 break;
160 }
162 if (i >= map_len)
163 return (NULL);
165 /* Look up the DS type and ds_index. */
166 if (map[i].ds_type < 0) /* {{{ */
167 {
168 const data_set_t *ds;
170 ds = plugin_get_ds (map[i].type);
171 if (ds == NULL)
172 {
173 WARNING ("gmond plugin: Type not defined: %s", map[i].type);
174 return (NULL);
175 }
177 if ((map[i].ds_name == NULL) && (ds->ds_num != 1))
178 {
179 WARNING ("gmond plugin: No data source name defined for metric %s, "
180 "but type %s has more than one data source.",
181 map[i].ganglia_name, map[i].type);
182 return (NULL);
183 }
185 if (map[i].ds_name == NULL)
186 {
187 map[i].ds_index = 0;
188 }
189 else
190 {
191 size_t j;
193 for (j = 0; j < ds->ds_num; j++)
194 if (strcasecmp (ds->ds[j].name, map[i].ds_name) == 0)
195 break;
197 if (j >= ds->ds_num)
198 {
199 WARNING ("gmond plugin: There is no data source "
200 "named `%s' in type `%s'.",
201 map[i].ds_name, ds->type);
202 return (NULL);
203 }
204 map[i].ds_index = j;
205 }
207 map[i].ds_type = ds->ds[map[i].ds_index].type;
208 } /* }}} if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) */
210 return (map + i);
211 } /* }}} metric_map_t *metric_lookup */
213 static int create_sockets (socket_entry_t **ret_sockets, /* {{{ */
214 size_t *ret_sockets_num,
215 const char *node, const char *service, int listen)
216 {
217 struct addrinfo ai_hints;
218 struct addrinfo *ai_list;
219 struct addrinfo *ai_ptr;
220 int ai_return;
222 socket_entry_t *sockets = NULL;
223 size_t sockets_num = 0;
225 int status;
227 if (*ret_sockets != NULL)
228 return (EINVAL);
230 memset (&ai_hints, 0, sizeof (ai_hints));
231 ai_hints.ai_flags = 0;
232 #ifdef AI_PASSIVE
233 ai_hints.ai_flags |= AI_PASSIVE;
234 #endif
235 #ifdef AI_ADDRCONFIG
236 ai_hints.ai_flags |= AI_ADDRCONFIG;
237 #endif
238 ai_hints.ai_family = AF_UNSPEC;
239 ai_hints.ai_socktype = SOCK_DGRAM;
240 ai_hints.ai_protocol = IPPROTO_UDP;
242 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
243 if (ai_return != 0)
244 {
245 char errbuf[1024];
246 ERROR ("gmond plugin: getaddrinfo (%s, %s) failed: %s",
247 (node == NULL) ? "(null)" : node,
248 (service == NULL) ? "(null)" : service,
249 (ai_return == EAI_SYSTEM)
250 ? sstrerror (errno, errbuf, sizeof (errbuf))
251 : gai_strerror (ai_return));
252 return (-1);
253 }
255 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) /* {{{ */
256 {
257 socket_entry_t *tmp;
259 tmp = realloc (sockets, (sockets_num + 1) * sizeof (*sockets));
260 if (tmp == NULL)
261 {
262 ERROR ("gmond plugin: realloc failed.");
263 continue;
264 }
265 sockets = tmp;
267 sockets[sockets_num].fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
268 ai_ptr->ai_protocol);
269 if (sockets[sockets_num].fd < 0)
270 {
271 char errbuf[1024];
272 ERROR ("gmond plugin: socket failed: %s",
273 sstrerror (errno, errbuf, sizeof (errbuf)));
274 continue;
275 }
277 assert (sizeof (sockets[sockets_num].addr) >= ai_ptr->ai_addrlen);
278 memcpy (&sockets[sockets_num].addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
279 sockets[sockets_num].addrlen = ai_ptr->ai_addrlen;
281 /* Sending socket: Open only one socket and don't bind it. */
282 if (listen == 0)
283 {
284 sockets_num++;
285 break;
286 }
287 else
288 {
289 int yes = 1;
291 setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
292 (void *) &yes, sizeof (yes));
293 }
295 status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
296 if (status != 0)
297 {
298 char errbuf[1024];
299 ERROR ("gmond plugin: bind failed: %s",
300 sstrerror (errno, errbuf, sizeof (errbuf)));
301 close (sockets[sockets_num].fd);
302 continue;
303 }
305 if (ai_ptr->ai_family == AF_INET)
306 {
307 struct sockaddr_in *addr;
308 struct ip_mreq mreq;
309 int loop;
311 addr = (struct sockaddr_in *) ai_ptr->ai_addr;
313 if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
314 {
315 sockets_num++;
316 continue;
317 }
319 loop = 1;
320 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
321 (void *) &loop, sizeof (loop));
323 memset (&mreq, 0, sizeof (mreq));
324 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
325 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
326 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
327 (void *) &mreq, sizeof (mreq));
328 } /* if (ai_ptr->ai_family == AF_INET) */
329 else if (ai_ptr->ai_family == AF_INET6)
330 {
331 struct sockaddr_in6 *addr;
332 struct ipv6_mreq mreq;
333 int loop;
335 addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
337 if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
338 {
339 sockets_num++;
340 continue;
341 }
343 loop = 1;
344 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
345 (void *) &loop, sizeof (loop));
347 memset (&mreq, 0, sizeof (mreq));
348 memcpy (&mreq.ipv6mr_multiaddr,
349 &addr->sin6_addr, sizeof (addr->sin6_addr));
350 mreq.ipv6mr_interface = 0; /* any */
351 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
352 (void *) &mreq, sizeof (mreq));
353 } /* if (ai_ptr->ai_family == AF_INET6) */
355 sockets_num++;
356 } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
358 freeaddrinfo (ai_list);
360 if (sockets_num == 0)
361 {
362 sfree (sockets);
363 return (-1);
364 }
366 *ret_sockets = sockets;
367 *ret_sockets_num = sockets_num;
368 return (0);
369 } /* }}} int create_sockets */
371 static int request_meta_data (const char *host, const char *name) /* {{{ */
372 {
373 Ganglia_metadata_msg msg;
374 char buffer[BUFF_SIZE];
375 unsigned int buffer_size;
376 XDR xdr;
377 size_t i;
379 memset (&msg, 0, sizeof (msg));
381 msg.id = gmetadata_request;
382 msg.Ganglia_metadata_msg_u.grequest.metric_id.host = strdup (host);
383 msg.Ganglia_metadata_msg_u.grequest.metric_id.name = strdup (name);
385 if ((msg.Ganglia_metadata_msg_u.grequest.metric_id.host == NULL)
386 || (msg.Ganglia_metadata_msg_u.grequest.metric_id.name == NULL))
387 {
388 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
389 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
390 return (-1);
391 }
393 memset (buffer, 0, sizeof (buffer));
394 xdrmem_create (&xdr, buffer, sizeof (buffer), XDR_ENCODE);
396 if (!xdr_Ganglia_metadata_msg (&xdr, &msg))
397 {
398 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
399 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
400 return (-1);
401 }
403 buffer_size = xdr_getpos (&xdr);
405 DEBUG ("gmond plugin: Requesting meta data for %s/%s.",
406 host, name);
408 pthread_mutex_lock (&mc_send_sockets_lock);
409 for (i = 0; i < mc_send_sockets_num; i++)
410 sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
411 /* flags = */ 0,
412 (struct sockaddr *) &mc_send_sockets[i].addr,
413 mc_send_sockets[i].addrlen);
414 pthread_mutex_unlock (&mc_send_sockets_lock);
416 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
417 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
418 return (0);
419 } /* }}} int request_meta_data */
421 static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
422 const char *name,
423 const char *type, const char *type_instance,
424 int values_len)
425 {
426 char key[2 * DATA_MAX_NAME_LEN];
427 staging_entry_t *se;
428 int status;
430 if (staging_tree == NULL)
431 return (NULL);
433 ssnprintf (key, sizeof (key), "%s/%s/%s", host, type,
434 (type_instance != NULL) ? type_instance : "");
436 se = NULL;
437 status = c_avl_get (staging_tree, key, (void *) &se);
438 if (status == 0)
439 return (se);
441 /* insert new entry */
442 se = (staging_entry_t *) malloc (sizeof (*se));
443 if (se == NULL)
444 return (NULL);
445 memset (se, 0, sizeof (*se));
447 sstrncpy (se->key, key, sizeof (se->key));
448 se->flags = 0;
450 se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
451 if (se->vl.values == NULL)
452 {
453 sfree (se);
454 return (NULL);
455 }
456 se->vl.values_len = values_len;
458 se->vl.time = 0;
459 se->vl.interval = 0;
460 sstrncpy (se->vl.host, host, sizeof (se->vl.host));
461 sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
462 sstrncpy (se->vl.type, type, sizeof (se->vl.type));
463 if (type_instance != NULL)
464 sstrncpy (se->vl.type_instance, type_instance,
465 sizeof (se->vl.type_instance));
467 status = c_avl_insert (staging_tree, se->key, se);
468 if (status != 0)
469 {
470 ERROR ("gmond plugin: c_avl_insert failed.");
471 sfree (se->vl.values);
472 sfree (se);
473 return (NULL);
474 }
476 return (se);
477 } /* }}} staging_entry_t *staging_entry_get */
479 static int staging_entry_submit (const char *host, const char *name, /* {{{ */
480 staging_entry_t *se)
481 {
482 value_list_t vl;
483 value_t values[se->vl.values_len];
485 if (se->vl.interval == 0)
486 {
487 /* No meta data has been received for this metric yet. */
488 se->flags = 0;
489 pthread_mutex_unlock (&staging_lock);
490 request_meta_data (host, name);
491 return (0);
492 }
494 se->flags = 0;
496 memcpy (values, se->vl.values, sizeof (values));
497 memcpy (&vl, &se->vl, sizeof (vl));
499 /* Unlock before calling `plugin_dispatch_values'.. */
500 pthread_mutex_unlock (&staging_lock);
502 vl.values = values;
504 plugin_dispatch_values (&vl);
506 return (0);
507 } /* }}} int staging_entry_submit */
509 static int staging_entry_update (const char *host, const char *name, /* {{{ */
510 const char *type, const char *type_instance,
511 size_t ds_index, int ds_type, value_t value)
512 {
513 const data_set_t *ds;
514 staging_entry_t *se;
516 ds = plugin_get_ds (type);
517 if (ds == NULL)
518 {
519 ERROR ("gmond plugin: Looking up type %s failed.", type);
520 return (-1);
521 }
523 if (ds->ds_num <= ds_index)
524 {
525 ERROR ("gmond plugin: Invalid index %zu: %s has only %zu data source(s).",
526 ds_index, ds->type, ds->ds_num);
527 return (-1);
528 }
530 pthread_mutex_lock (&staging_lock);
532 se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
533 if (se == NULL)
534 {
535 pthread_mutex_unlock (&staging_lock);
536 ERROR ("gmond plugin: staging_entry_get failed.");
537 return (-1);
538 }
539 if (se->vl.values_len != ds->ds_num)
540 {
541 pthread_mutex_unlock (&staging_lock);
542 return (-1);
543 }
545 if (ds_type == DS_TYPE_COUNTER)
546 se->vl.values[ds_index].counter += value.counter;
547 else if (ds_type == DS_TYPE_GAUGE)
548 se->vl.values[ds_index].gauge = value.gauge;
549 else if (ds_type == DS_TYPE_DERIVE)
550 se->vl.values[ds_index].derive += value.derive;
551 else if (ds_type == DS_TYPE_ABSOLUTE)
552 se->vl.values[ds_index].absolute = value.absolute;
553 else
554 assert (23 == 42);
556 se->flags |= (0x01 << ds_index);
558 /* Check if all values have been set and submit if so. */
559 if (se->flags == ((0x01 << se->vl.values_len) - 1))
560 {
561 /* `staging_lock' is unlocked in `staging_entry_submit'. */
562 staging_entry_submit (host, name, se);
563 }
564 else
565 {
566 pthread_mutex_unlock (&staging_lock);
567 }
569 return (0);
570 } /* }}} int staging_entry_update */
572 static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
573 {
574 const char *host;
575 const char *name;
576 metric_map_t *map;
578 value_t value_counter;
579 value_t value_gauge;
580 value_t value_derive;
582 /* Fill in `host', `name', `value_counter', and `value_gauge' according to
583 * the value type, or return with an error. */
584 switch (msg->id) /* {{{ */
585 {
586 case gmetric_uint:
587 {
588 Ganglia_gmetric_uint msg_uint;
590 msg_uint = msg->Ganglia_value_msg_u.gu_int;
592 host = msg_uint.metric_id.host;
593 name = msg_uint.metric_id.name;
594 value_counter.counter = (counter_t) msg_uint.ui;
595 value_gauge.gauge = (gauge_t) msg_uint.ui;
596 value_derive.derive = (derive_t) msg_uint.ui;
597 break;
598 }
600 case gmetric_string:
601 {
602 Ganglia_gmetric_string msg_string;
603 int status;
605 msg_string = msg->Ganglia_value_msg_u.gstr;
607 host = msg_string.metric_id.host;
608 name = msg_string.metric_id.name;
610 status = parse_value (msg_string.str, &value_derive, DS_TYPE_DERIVE);
611 if (status != 0)
612 value_derive.derive = -1;
614 status = parse_value (msg_string.str, &value_gauge, DS_TYPE_GAUGE);
615 if (status != 0)
616 value_gauge.gauge = NAN;
618 status = parse_value (msg_string.str, &value_counter, DS_TYPE_COUNTER);
619 if (status != 0)
620 value_counter.counter = 0;
622 break;
623 }
625 case gmetric_float:
626 {
627 Ganglia_gmetric_float msg_float;
629 msg_float = msg->Ganglia_value_msg_u.gf;
631 host = msg_float.metric_id.host;
632 name = msg_float.metric_id.name;
633 value_counter.counter = (counter_t) msg_float.f;
634 value_gauge.gauge = (gauge_t) msg_float.f;
635 value_derive.derive = (derive_t) msg_float.f;
636 break;
637 }
639 case gmetric_double:
640 {
641 Ganglia_gmetric_double msg_double;
643 msg_double = msg->Ganglia_value_msg_u.gd;
645 host = msg_double.metric_id.host;
646 name = msg_double.metric_id.name;
647 value_counter.counter = (counter_t) msg_double.d;
648 value_gauge.gauge = (gauge_t) msg_double.d;
649 value_derive.derive = (derive_t) msg_double.d;
650 break;
651 }
652 default:
653 DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
654 return (-1);
655 } /* }}} switch (msg->id) */
657 assert (host != NULL);
658 assert (name != NULL);
660 map = metric_lookup (name);
661 if (map != NULL)
662 {
663 value_t val_copy;
665 if ((map->ds_type == DS_TYPE_COUNTER)
666 || (map->ds_type == DS_TYPE_ABSOLUTE))
667 val_copy = value_counter;
668 else if (map->ds_type == DS_TYPE_GAUGE)
669 val_copy = value_gauge;
670 else if (map->ds_type == DS_TYPE_DERIVE)
671 val_copy = value_derive;
672 else
673 assert (23 == 42);
675 return (staging_entry_update (host, name,
676 map->type, map->type_instance,
677 map->ds_index, map->ds_type,
678 val_copy));
679 }
681 DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
682 return (-1);
683 } /* }}} int mc_handle_value_msg */
685 static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
686 {
687 switch (msg->id)
688 {
689 case gmetadata_full:
690 {
691 Ganglia_metadatadef msg_meta;
692 staging_entry_t *se;
693 const data_set_t *ds;
694 metric_map_t *map;
696 msg_meta = msg->Ganglia_metadata_msg_u.gfull;
698 if (msg_meta.metric.tmax <= 0)
699 return (-1);
701 map = metric_lookup (msg_meta.metric_id.name);
702 if (map == NULL)
703 {
704 DEBUG ("gmond plugin: Not handling meta data %s.",
705 msg_meta.metric_id.name);
706 return (0);
707 }
709 ds = plugin_get_ds (map->type);
710 if (ds == NULL)
711 {
712 WARNING ("gmond plugin: Could not find data set %s.", map->type);
713 return (-1);
714 }
716 DEBUG ("gmond plugin: Received meta data for %s/%s.",
717 msg_meta.metric_id.host, msg_meta.metric_id.name);
719 pthread_mutex_lock (&staging_lock);
720 se = staging_entry_get (msg_meta.metric_id.host,
721 msg_meta.metric_id.name,
722 map->type, map->type_instance,
723 ds->ds_num);
724 if (se != NULL)
725 se->vl.interval = TIME_T_TO_CDTIME_T (msg_meta.metric.tmax);
726 pthread_mutex_unlock (&staging_lock);
728 if (se == NULL)
729 {
730 ERROR ("gmond plugin: staging_entry_get failed.");
731 return (-1);
732 }
734 break;
735 }
737 default:
738 {
739 return (-1);
740 }
741 }
743 return (0);
744 } /* }}} int mc_handle_metadata_msg */
746 static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
747 {
748 XDR xdr;
749 Ganglia_msg_formats format;
751 xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
753 xdr_Ganglia_msg_formats (&xdr, &format);
754 xdr_setpos (&xdr, 0);
756 switch (format)
757 {
758 case gmetric_ushort:
759 case gmetric_short:
760 case gmetric_int:
761 case gmetric_uint:
762 case gmetric_string:
763 case gmetric_float:
764 case gmetric_double:
765 {
766 Ganglia_value_msg msg;
768 memset (&msg, 0, sizeof (msg));
769 if (xdr_Ganglia_value_msg (&xdr, &msg))
770 mc_handle_value_msg (&msg);
771 break;
772 }
774 case gmetadata_full:
775 case gmetadata_request:
776 {
777 Ganglia_metadata_msg msg;
778 memset (&msg, 0, sizeof (msg));
779 if (xdr_Ganglia_metadata_msg (&xdr, &msg))
780 mc_handle_metadata_msg (&msg);
781 break;
782 }
784 default:
785 DEBUG ("gmond plugin: Unknown format: %i", format);
786 return (-1);
787 } /* switch (format) */
790 return (0);
791 } /* }}} int mc_handle_metric */
793 static int mc_handle_socket (struct pollfd *p) /* {{{ */
794 {
795 char buffer[BUFF_SIZE];
796 ssize_t buffer_size;
798 if ((p->revents & (POLLIN | POLLPRI)) == 0)
799 {
800 p->revents = 0;
801 return (-1);
802 }
804 buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
805 if (buffer_size <= 0)
806 {
807 char errbuf[1024];
808 ERROR ("gmond plugin: recv failed: %s",
809 sstrerror (errno, errbuf, sizeof (errbuf)));
810 p->revents = 0;
811 return (-1);
812 }
814 mc_handle_metric (buffer, (size_t) buffer_size);
815 return (0);
816 } /* }}} int mc_handle_socket */
818 static void *mc_receive_thread (void *arg) /* {{{ */
819 {
820 socket_entry_t *mc_receive_socket_entries;
821 int status;
822 size_t i;
824 mc_receive_socket_entries = NULL;
825 status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
826 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
827 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
828 /* listen = */ 1);
829 if (status != 0)
830 {
831 ERROR ("gmond plugin: create_sockets failed.");
832 return ((void *) -1);
833 }
835 mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
836 sizeof (*mc_receive_sockets));
837 if (mc_receive_sockets == NULL)
838 {
839 ERROR ("gmond plugin: calloc failed.");
840 for (i = 0; i < mc_receive_sockets_num; i++)
841 close (mc_receive_socket_entries[i].fd);
842 free (mc_receive_socket_entries);
843 mc_receive_socket_entries = NULL;
844 mc_receive_sockets_num = 0;
845 return ((void *) -1);
846 }
848 for (i = 0; i < mc_receive_sockets_num; i++)
849 {
850 mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
851 mc_receive_sockets[i].events = POLLIN | POLLPRI;
852 mc_receive_sockets[i].revents = 0;
853 }
855 while (mc_receive_thread_loop != 0)
856 {
857 status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
858 if (status <= 0)
859 {
860 char errbuf[1024];
861 if (errno == EINTR)
862 continue;
863 ERROR ("gmond plugin: poll failed: %s",
864 sstrerror (errno, errbuf, sizeof (errbuf)));
865 break;
866 }
868 for (i = 0; i < mc_receive_sockets_num; i++)
869 {
870 if (mc_receive_sockets[i].revents != 0)
871 mc_handle_socket (mc_receive_sockets + i);
872 }
873 } /* while (mc_receive_thread_loop != 0) */
875 free (mc_receive_socket_entries);
876 return ((void *) 0);
877 } /* }}} void *mc_receive_thread */
879 static int mc_receive_thread_start (void) /* {{{ */
880 {
881 int status;
883 if (mc_receive_thread_running != 0)
884 return (-1);
886 mc_receive_thread_loop = 1;
888 status = plugin_thread_create (&mc_receive_thread_id, /* attr = */ NULL,
889 mc_receive_thread, /* args = */ NULL);
890 if (status != 0)
891 {
892 ERROR ("gmond plugin: Starting receive thread failed.");
893 mc_receive_thread_loop = 0;
894 return (-1);
895 }
897 mc_receive_thread_running = 1;
898 return (0);
899 } /* }}} int start_receive_thread */
901 static int mc_receive_thread_stop (void) /* {{{ */
902 {
903 if (mc_receive_thread_running == 0)
904 return (-1);
906 mc_receive_thread_loop = 0;
908 INFO ("gmond plugin: Stopping receive thread.");
909 pthread_kill (mc_receive_thread_id, SIGTERM);
910 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
911 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
913 mc_receive_thread_running = 0;
915 return (0);
916 } /* }}} int mc_receive_thread_stop */
918 /*
919 * Config:
920 *
921 * <Plugin gmond>
922 * MCReceiveFrom "239.2.11.71" "8649"
923 * <Metric "load_one">
924 * Type "load"
925 * [TypeInstance "foo"]
926 * [DataSource "bar"]
927 * </Metric>
928 * </Plugin>
929 */
930 static int gmond_config_set_string (oconfig_item_t *ci, char **str) /* {{{ */
931 {
932 char *tmp;
934 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
935 {
936 WARNING ("gmond plugin: The `%s' option needs "
937 "exactly one string argument.", ci->key);
938 return (-1);
939 }
941 tmp = strdup (ci->values[0].value.string);
942 if (tmp == NULL)
943 {
944 ERROR ("gmond plugin: strdup failed.");
945 return (-1);
946 }
948 sfree (*str);
949 *str = tmp;
950 return (0);
951 } /* }}} int gmond_config_set_string */
953 static int gmond_config_add_metric (oconfig_item_t *ci) /* {{{ */
954 {
955 metric_map_t *map;
956 int i;
958 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
959 {
960 WARNING ("gmond plugin: `Metric' blocks need "
961 "exactly one string argument.");
962 return (-1);
963 }
965 map = realloc (metric_map, (metric_map_len + 1) * sizeof (*metric_map));
966 if (map == NULL)
967 {
968 ERROR ("gmond plugin: realloc failed.");
969 return (-1);
970 }
971 metric_map = map;
972 map = metric_map + metric_map_len;
974 memset (map, 0, sizeof (*map));
975 map->type = NULL;
976 map->type_instance = NULL;
977 map->ds_name = NULL;
978 map->ds_type = -1;
979 map->ds_index = -1;
981 map->ganglia_name = strdup (ci->values[0].value.string);
982 if (map->ganglia_name == NULL)
983 {
984 ERROR ("gmond plugin: strdup failed.");
985 return (-1);
986 }
988 for (i = 0; i < ci->children_num; i++)
989 {
990 oconfig_item_t *child = ci->children + i;
991 if (strcasecmp ("Type", child->key) == 0)
992 gmond_config_set_string (child, &map->type);
993 else if (strcasecmp ("TypeInstance", child->key) == 0)
994 gmond_config_set_string (child, &map->type_instance);
995 else if (strcasecmp ("DataSource", child->key) == 0)
996 gmond_config_set_string (child, &map->ds_name);
997 else
998 {
999 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1000 child->key);
1001 }
1002 }
1004 if (map->type == NULL)
1005 {
1006 ERROR ("gmond plugin: No type is set for metric %s.",
1007 map->ganglia_name);
1008 sfree (map->ganglia_name);
1009 sfree (map->type_instance);
1010 return (-1);
1011 }
1013 metric_map_len++;
1014 return (0);
1015 } /* }}} int gmond_config_add_metric */
1017 static int gmond_config_set_address (oconfig_item_t *ci, /* {{{ */
1018 char **ret_addr, char **ret_port)
1019 {
1020 char *addr;
1021 char *port;
1023 if ((ci->values_num != 1) && (ci->values_num != 2))
1024 {
1025 WARNING ("gmond plugin: The `%s' config option needs "
1026 "one or two string arguments.",
1027 ci->key);
1028 return (-1);
1029 }
1030 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
1031 || ((ci->values_num == 2)
1032 && (ci->values[1].type != OCONFIG_TYPE_STRING)))
1033 {
1034 WARNING ("gmond plugin: The `%s' config option needs "
1035 "one or two string arguments.",
1036 ci->key);
1037 return (-1);
1038 }
1040 addr = strdup (ci->values[0].value.string);
1041 if (ci->values_num == 2)
1042 port = strdup (ci->values[1].value.string);
1043 else
1044 port = NULL;
1046 if ((addr == NULL) || ((ci->values_num == 2) && (port == NULL)))
1047 {
1048 ERROR ("gmond plugin: strdup failed.");
1049 sfree (addr);
1050 sfree (port);
1051 return (-1);
1052 }
1054 sfree (*ret_addr);
1055 sfree (*ret_port);
1057 *ret_addr = addr;
1058 *ret_port = port;
1060 return (0);
1061 } /* }}} int gmond_config_set_address */
1063 static int gmond_config (oconfig_item_t *ci) /* {{{ */
1064 {
1065 int i;
1067 for (i = 0; i < ci->children_num; i++)
1068 {
1069 oconfig_item_t *child = ci->children + i;
1070 if (strcasecmp ("MCReceiveFrom", child->key) == 0)
1071 gmond_config_set_address (child, &mc_receive_group, &mc_receive_port);
1072 else if (strcasecmp ("Metric", child->key) == 0)
1073 gmond_config_add_metric (child);
1074 else
1075 {
1076 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1077 child->key);
1078 }
1079 }
1081 return (0);
1082 } /* }}} int gmond_config */
1084 static int gmond_init (void) /* {{{ */
1085 {
1086 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
1087 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
1088 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
1089 /* listen = */ 0);
1091 staging_tree = c_avl_create ((void *) strcmp);
1092 if (staging_tree == NULL)
1093 {
1094 ERROR ("gmond plugin: c_avl_create failed.");
1095 return (-1);
1096 }
1098 mc_receive_thread_start ();
1100 return (0);
1101 } /* }}} int gmond_init */
1103 static int gmond_shutdown (void) /* {{{ */
1104 {
1105 size_t i;
1107 mc_receive_thread_stop ();
1109 pthread_mutex_lock (&mc_send_sockets_lock);
1110 for (i = 0; i < mc_send_sockets_num; i++)
1111 {
1112 close (mc_send_sockets[i].fd);
1113 mc_send_sockets[i].fd = -1;
1114 }
1115 sfree (mc_send_sockets);
1116 mc_send_sockets_num = 0;
1117 pthread_mutex_unlock (&mc_send_sockets_lock);
1120 return (0);
1121 } /* }}} int gmond_shutdown */
1123 void module_register (void)
1124 {
1125 plugin_register_complex_config ("gmond", gmond_config);
1126 plugin_register_init ("gmond", gmond_init);
1127 plugin_register_shutdown ("gmond", gmond_shutdown);
1128 }
1130 /* vim: set sw=2 sts=2 et fdm=marker : */