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_SYS_SOCKET_H
37 # include <sys/socket.h>
38 #endif
39 #if HAVE_NETDB_H
40 # include <netdb.h>
41 #endif
42 #if HAVE_NETINET_IN_H
43 # include <netinet/in.h>
44 #endif
45 #if HAVE_ARPA_INET_H
46 # include <arpa/inet.h>
47 #endif
48 #if HAVE_POLL_H
49 # include <poll.h>
50 #endif
52 #include <gm_protocol.h>
54 #ifndef IPV6_ADD_MEMBERSHIP
55 # ifdef IPV6_JOIN_GROUP
56 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
57 # else
58 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
59 # endif
60 #endif /* !IP_ADD_MEMBERSHIP */
62 #ifdef GANGLIA_MAX_MESSAGE_LEN
63 # define BUFF_SIZE GANGLIA_MAX_MESSAGE_LEN
64 #else
65 # define BUFF_SIZE 1400
66 #endif
68 struct socket_entry_s
69 {
70 int fd;
71 struct sockaddr_storage addr;
72 socklen_t addrlen;
73 };
74 typedef struct socket_entry_s socket_entry_t;
76 struct staging_entry_s
77 {
78 char key[2 * DATA_MAX_NAME_LEN];
79 value_list_t vl;
80 int flags;
81 };
82 typedef struct staging_entry_s staging_entry_t;
84 struct metric_map_s
85 {
86 char *ganglia_name;
87 char *type;
88 char *type_instance;
89 char *ds_name;
90 int ds_type;
91 int ds_index;
92 };
93 typedef struct metric_map_s metric_map_t;
95 #define MC_RECEIVE_GROUP_DEFAULT "239.2.11.71"
96 static char *mc_receive_group = NULL;
97 #define MC_RECEIVE_PORT_DEFAULT "8649"
98 static char *mc_receive_port = NULL;
100 static struct pollfd *mc_receive_sockets = NULL;
101 static size_t mc_receive_sockets_num = 0;
103 static socket_entry_t *mc_send_sockets = NULL;
104 static size_t mc_send_sockets_num = 0;
105 static pthread_mutex_t mc_send_sockets_lock = PTHREAD_MUTEX_INITIALIZER;
107 static int mc_receive_thread_loop = 0;
108 static int mc_receive_thread_running = 0;
109 static pthread_t mc_receive_thread_id;
111 static metric_map_t metric_map_default[] =
112 { /*---------------+-------------+-----------+-------------+------+-----*
113 * ganglia_name ! type ! type_inst ! data_source ! type ! idx *
114 *---------------+-------------+-----------+-------------+------+-----*/
115 { "load_one", "load", "", "shortterm", -1, -1 },
116 { "load_five", "load", "", "midterm", -1, -1 },
117 { "load_fifteen", "load", "", "longterm", -1, -1 },
118 { "cpu_user", "cpu", "user", "value", -1, -1 },
119 { "cpu_system", "cpu", "system", "value", -1, -1 },
120 { "cpu_idle", "cpu", "idle", "value", -1, -1 },
121 { "cpu_nice", "cpu", "nice", "value", -1, -1 },
122 { "cpu_wio", "cpu", "wait", "value", -1, -1 },
123 { "mem_free", "memory", "free", "value", -1, -1 },
124 { "mem_shared", "memory", "shared", "value", -1, -1 },
125 { "mem_buffers", "memory", "buffered", "value", -1, -1 },
126 { "mem_cached", "memory", "cached", "value", -1, -1 },
127 { "mem_total", "memory", "total", "value", -1, -1 },
128 { "bytes_in", "if_octets", "", "rx", -1, -1 },
129 { "bytes_out", "if_octets", "", "tx", -1, -1 },
130 { "pkts_in", "if_packets", "", "rx", -1, -1 },
131 { "pkts_out", "if_packets", "", "tx", -1, -1 }
132 };
133 static size_t metric_map_len_default = STATIC_ARRAY_SIZE (metric_map_default);
135 static metric_map_t *metric_map = NULL;
136 static size_t metric_map_len = 0;
138 static c_avl_tree_t *staging_tree;
139 static pthread_mutex_t staging_lock = PTHREAD_MUTEX_INITIALIZER;
141 static metric_map_t *metric_lookup (const char *key) /* {{{ */
142 {
143 metric_map_t *map;
144 size_t map_len;
145 size_t i;
147 /* Search the user-supplied table first.. */
148 map = metric_map;
149 map_len = metric_map_len;
150 for (i = 0; i < map_len; i++)
151 if (strcmp (map[i].ganglia_name, key) == 0)
152 break;
154 /* .. and fall back to the built-in table if nothing is found. */
155 if (i >= map_len)
156 {
157 map = metric_map_default;
158 map_len = metric_map_len_default;
160 for (i = 0; i < map_len; i++)
161 if (strcmp (map[i].ganglia_name, key) == 0)
162 break;
163 }
165 if (i >= map_len)
166 return (NULL);
168 /* Look up the DS type and ds_index. */
169 if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) /* {{{ */
170 {
171 const data_set_t *ds;
173 ds = plugin_get_ds (map[i].type);
174 if (ds == NULL)
175 {
176 WARNING ("gmond plugin: Type not defined: %s", map[i].type);
177 return (NULL);
178 }
180 if ((map[i].ds_name == NULL) && (ds->ds_num != 1))
181 {
182 WARNING ("gmond plugin: No data source name defined for metric %s, "
183 "but type %s has more than one data source.",
184 map[i].ganglia_name, map[i].type);
185 return (NULL);
186 }
188 if (map[i].ds_name == NULL)
189 {
190 map[i].ds_index = 0;
191 }
192 else
193 {
194 int j;
196 for (j = 0; j < ds->ds_num; j++)
197 if (strcasecmp (ds->ds[j].name, map[i].ds_name) == 0)
198 break;
200 if (j >= ds->ds_num)
201 {
202 WARNING ("gmond plugin: There is no data source "
203 "named `%s' in type `%s'.",
204 map[i].ds_name, ds->type);
205 return (NULL);
206 }
207 map[i].ds_index = j;
208 }
210 map[i].ds_type = ds->ds[map[i].ds_index].type;
211 } /* }}} if ((map[i].ds_type < 0) || (map[i].ds_index < 0)) */
213 return (map + i);
214 } /* }}} metric_map_t *metric_lookup */
216 static int create_sockets (socket_entry_t **ret_sockets, /* {{{ */
217 size_t *ret_sockets_num,
218 const char *node, const char *service, int listen)
219 {
220 struct addrinfo ai_hints;
221 struct addrinfo *ai_list;
222 struct addrinfo *ai_ptr;
223 int ai_return;
225 socket_entry_t *sockets;
226 size_t sockets_num;
228 int status;
230 sockets = *ret_sockets;
231 sockets_num = *ret_sockets_num;
233 memset (&ai_hints, 0, sizeof (ai_hints));
234 ai_hints.ai_flags = 0;
235 #ifdef AI_PASSIVE
236 ai_hints.ai_flags |= AI_PASSIVE;
237 #endif
238 #ifdef AI_ADDRCONFIG
239 ai_hints.ai_flags |= AI_ADDRCONFIG;
240 #endif
241 ai_hints.ai_family = AF_UNSPEC;
242 ai_hints.ai_socktype = SOCK_DGRAM;
243 ai_hints.ai_protocol = IPPROTO_UDP;
245 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
246 if (ai_return != 0)
247 {
248 char errbuf[1024];
249 ERROR ("gmond plugin: getaddrinfo (%s, %s) failed: %s",
250 (node == NULL) ? "(null)" : node,
251 (service == NULL) ? "(null)" : service,
252 (ai_return == EAI_SYSTEM)
253 ? sstrerror (errno, errbuf, sizeof (errbuf))
254 : gai_strerror (ai_return));
255 return (-1);
256 }
258 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) /* {{{ */
259 {
260 socket_entry_t *tmp;
262 tmp = realloc (sockets, (sockets_num + 1) * sizeof (*sockets));
263 if (tmp == NULL)
264 {
265 ERROR ("gmond plugin: realloc failed.");
266 continue;
267 }
268 sockets = tmp;
270 sockets[sockets_num].fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
271 ai_ptr->ai_protocol);
272 if (sockets[sockets_num].fd < 0)
273 {
274 char errbuf[1024];
275 ERROR ("gmond plugin: socket failed: %s",
276 sstrerror (errno, errbuf, sizeof (errbuf)));
277 continue;
278 }
280 assert (sizeof (sockets[sockets_num].addr) >= ai_ptr->ai_addrlen);
281 memcpy (&sockets[sockets_num].addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
282 sockets[sockets_num].addrlen = ai_ptr->ai_addrlen;
284 /* Sending socket: Open only one socket and don't bind it. */
285 if (listen == 0)
286 {
287 sockets_num++;
288 break;
289 }
290 else
291 {
292 int yes = 1;
294 setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
295 (void *) &yes, sizeof (yes));
296 }
298 status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
299 if (status != 0)
300 {
301 char errbuf[1024];
302 ERROR ("gmond plugin: bind failed: %s",
303 sstrerror (errno, errbuf, sizeof (errbuf)));
304 close (sockets[sockets_num].fd);
305 continue;
306 }
308 if (ai_ptr->ai_family == AF_INET)
309 {
310 struct sockaddr_in *addr;
311 struct ip_mreq mreq;
312 int loop;
314 addr = (struct sockaddr_in *) ai_ptr->ai_addr;
316 if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
317 {
318 sockets_num++;
319 continue;
320 }
322 loop = 1;
323 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
324 (void *) &loop, sizeof (loop));
326 memset (&mreq, 0, sizeof (mreq));
327 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
328 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
329 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
330 (void *) &mreq, sizeof (mreq));
331 } /* if (ai_ptr->ai_family == AF_INET) */
332 else if (ai_ptr->ai_family == AF_INET6)
333 {
334 struct sockaddr_in6 *addr;
335 struct ipv6_mreq mreq;
336 int loop;
338 addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
340 if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
341 {
342 sockets_num++;
343 continue;
344 }
346 loop = 1;
347 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
348 (void *) &loop, sizeof (loop));
350 memset (&mreq, 0, sizeof (mreq));
351 memcpy (&mreq.ipv6mr_multiaddr,
352 &addr->sin6_addr, sizeof (addr->sin6_addr));
353 mreq.ipv6mr_interface = 0; /* any */
354 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
355 (void *) &mreq, sizeof (mreq));
356 } /* if (ai_ptr->ai_family == AF_INET6) */
358 sockets_num++;
359 } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
361 freeaddrinfo (ai_list);
363 if ((*ret_sockets_num) >= sockets_num)
364 return (-1);
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 int 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 %i: %s has only %i 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 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 return ((void *) 0);
876 } /* }}} void *mc_receive_thread */
878 static int mc_receive_thread_start (void) /* {{{ */
879 {
880 int status;
882 if (mc_receive_thread_running != 0)
883 return (-1);
885 mc_receive_thread_loop = 1;
887 status = plugin_thread_create (&mc_receive_thread_id, /* attr = */ NULL,
888 mc_receive_thread, /* args = */ NULL);
889 if (status != 0)
890 {
891 ERROR ("gmond plugin: Starting receive thread failed.");
892 mc_receive_thread_loop = 0;
893 return (-1);
894 }
896 mc_receive_thread_running = 1;
897 return (0);
898 } /* }}} int start_receive_thread */
900 static int mc_receive_thread_stop (void) /* {{{ */
901 {
902 if (mc_receive_thread_running == 0)
903 return (-1);
905 mc_receive_thread_loop = 0;
907 INFO ("gmond plugin: Stopping receive thread.");
908 pthread_kill (mc_receive_thread_id, SIGTERM);
909 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
910 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
912 mc_receive_thread_running = 0;
914 return (0);
915 } /* }}} int mc_receive_thread_stop */
917 /*
918 * Config:
919 *
920 * <Plugin gmond>
921 * MCReceiveFrom "239.2.11.71" "8649"
922 * <Metric "load_one">
923 * Type "load"
924 * [TypeInstance "foo"]
925 * [DataSource "bar"]
926 * </Metric>
927 * </Plugin>
928 */
929 static int gmond_config_set_string (oconfig_item_t *ci, char **str) /* {{{ */
930 {
931 char *tmp;
933 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
934 {
935 WARNING ("gmond plugin: The `%s' option needs "
936 "exactly one string argument.", ci->key);
937 return (-1);
938 }
940 tmp = strdup (ci->values[0].value.string);
941 if (tmp == NULL)
942 {
943 ERROR ("gmond plugin: strdup failed.");
944 return (-1);
945 }
947 sfree (*str);
948 *str = tmp;
949 return (0);
950 } /* }}} int gmond_config_set_string */
952 static int gmond_config_add_metric (oconfig_item_t *ci) /* {{{ */
953 {
954 metric_map_t *map;
955 int i;
957 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
958 {
959 WARNING ("gmond plugin: `Metric' blocks need "
960 "exactly one string argument.");
961 return (-1);
962 }
964 map = realloc (metric_map, (metric_map_len + 1) * sizeof (*metric_map));
965 if (map == NULL)
966 {
967 ERROR ("gmond plugin: realloc failed.");
968 return (-1);
969 }
970 metric_map = map;
971 map = metric_map + metric_map_len;
973 memset (map, 0, sizeof (*map));
974 map->type = NULL;
975 map->type_instance = NULL;
976 map->ds_name = NULL;
977 map->ds_type = -1;
978 map->ds_index = -1;
980 map->ganglia_name = strdup (ci->values[0].value.string);
981 if (map->ganglia_name == NULL)
982 {
983 ERROR ("gmond plugin: strdup failed.");
984 return (-1);
985 }
987 for (i = 0; i < ci->children_num; i++)
988 {
989 oconfig_item_t *child = ci->children + i;
990 if (strcasecmp ("Type", child->key) == 0)
991 gmond_config_set_string (child, &map->type);
992 else if (strcasecmp ("TypeInstance", child->key) == 0)
993 gmond_config_set_string (child, &map->type_instance);
994 else if (strcasecmp ("DataSource", child->key) == 0)
995 gmond_config_set_string (child, &map->ds_name);
996 else
997 {
998 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
999 child->key);
1000 }
1001 }
1003 if (map->type == NULL)
1004 {
1005 ERROR ("gmond plugin: No type is set for metric %s.",
1006 map->ganglia_name);
1007 sfree (map->ganglia_name);
1008 sfree (map->type_instance);
1009 return (-1);
1010 }
1012 metric_map_len++;
1013 return (0);
1014 } /* }}} int gmond_config_add_metric */
1016 static int gmond_config_set_address (oconfig_item_t *ci, /* {{{ */
1017 char **ret_addr, char **ret_port)
1018 {
1019 char *addr;
1020 char *port;
1022 if ((ci->values_num != 1) && (ci->values_num != 2))
1023 {
1024 WARNING ("gmond plugin: The `%s' config option needs "
1025 "one or two string arguments.",
1026 ci->key);
1027 return (-1);
1028 }
1029 if ((ci->values[0].type != OCONFIG_TYPE_STRING)
1030 || ((ci->values_num == 2)
1031 && (ci->values[1].type != OCONFIG_TYPE_STRING)))
1032 {
1033 WARNING ("gmond plugin: The `%s' config option needs "
1034 "one or two string arguments.",
1035 ci->key);
1036 return (-1);
1037 }
1039 addr = strdup (ci->values[0].value.string);
1040 if (ci->values_num == 2)
1041 port = strdup (ci->values[1].value.string);
1042 else
1043 port = NULL;
1045 if ((addr == NULL) || ((ci->values_num == 2) && (port == NULL)))
1046 {
1047 ERROR ("gmond plugin: strdup failed.");
1048 sfree (addr);
1049 sfree (port);
1050 return (-1);
1051 }
1053 sfree (*ret_addr);
1054 sfree (*ret_port);
1056 *ret_addr = addr;
1057 *ret_port = port;
1059 return (0);
1060 } /* }}} int gmond_config_set_address */
1062 static int gmond_config (oconfig_item_t *ci) /* {{{ */
1063 {
1064 int i;
1066 for (i = 0; i < ci->children_num; i++)
1067 {
1068 oconfig_item_t *child = ci->children + i;
1069 if (strcasecmp ("MCReceiveFrom", child->key) == 0)
1070 gmond_config_set_address (child, &mc_receive_group, &mc_receive_port);
1071 else if (strcasecmp ("Metric", child->key) == 0)
1072 gmond_config_add_metric (child);
1073 else
1074 {
1075 WARNING ("gmond plugin: Unknown configuration option `%s' ignored.",
1076 child->key);
1077 }
1078 }
1080 return (0);
1081 } /* }}} int gmond_config */
1083 static int gmond_init (void) /* {{{ */
1084 {
1085 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
1086 (mc_receive_group != NULL) ? mc_receive_group : MC_RECEIVE_GROUP_DEFAULT,
1087 (mc_receive_port != NULL) ? mc_receive_port : MC_RECEIVE_PORT_DEFAULT,
1088 /* listen = */ 0);
1090 staging_tree = c_avl_create ((void *) strcmp);
1091 if (staging_tree == NULL)
1092 {
1093 ERROR ("gmond plugin: c_avl_create failed.");
1094 return (-1);
1095 }
1097 mc_receive_thread_start ();
1099 return (0);
1100 } /* }}} int gmond_init */
1102 static int gmond_shutdown (void) /* {{{ */
1103 {
1104 size_t i;
1106 mc_receive_thread_stop ();
1108 pthread_mutex_lock (&mc_send_sockets_lock);
1109 for (i = 0; i < mc_send_sockets_num; i++)
1110 {
1111 close (mc_send_sockets[i].fd);
1112 mc_send_sockets[i].fd = -1;
1113 }
1114 sfree (mc_send_sockets);
1115 mc_send_sockets_num = 0;
1116 pthread_mutex_unlock (&mc_send_sockets_lock);
1119 return (0);
1120 } /* }}} int gmond_shutdown */
1122 void module_register (void)
1123 {
1124 plugin_register_complex_config ("gmond", gmond_config);
1125 plugin_register_init ("gmond", gmond_init);
1126 plugin_register_shutdown ("gmond", gmond_shutdown);
1127 }
1129 /* vim: set sw=2 sts=2 et fdm=marker : */