--- /dev/null
+/**
+ * collectd - src/gmond.c
+ * Copyright (C) 2005-2009 Florian octo Forster
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Florian octo Forster <octo at verplant.org>
+ **/
+
+#include "collectd.h"
+#include "plugin.h"
+#include "common.h"
+#include "configfile.h"
+#include "utils_avltree.h"
+
+#include "network.h"
+
+#if HAVE_PTHREAD_H
+# include <pthread.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#if HAVE_NETDB_H
+# include <netdb.h>
+#endif
+#if HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#if HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#endif
+#if HAVE_POLL_H
+# include <poll.h>
+#endif
+
+#include <gm_protocol.h>
+
+#ifndef IPV6_ADD_MEMBERSHIP
+# ifdef IPV6_JOIN_GROUP
+# define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
+# else
+# error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
+# endif
+#endif /* !IP_ADD_MEMBERSHIP */
+
+#ifdef GANGLIA_MAX_MESSAGE_LEN
+# define BUFF_SIZE GANGLIA_MAX_MESSAGE_LEN
+#else
+# define BUFF_SIZE 1400
+#endif
+
+struct socket_entry_s
+{
+ int fd;
+ struct sockaddr_storage addr;
+ socklen_t addrlen;
+};
+typedef struct socket_entry_s socket_entry_t;
+
+struct staging_entry_s
+{
+ char key[2 * DATA_MAX_NAME_LEN];
+ value_list_t vl;
+ int flags;
+};
+typedef struct staging_entry_s staging_entry_t;
+
+struct metric_map_s
+{
+ const char *ganglia_name;
+ const char *type;
+ const char *type_instance;
+ int ds_type;
+ size_t value_index;
+};
+typedef struct metric_map_s metric_map_t;
+
+static struct pollfd *mc_receive_sockets = NULL;
+static size_t mc_receive_sockets_num = 0;
+
+static socket_entry_t *mc_send_sockets = NULL;
+static size_t mc_send_sockets_num = 0;
+static pthread_mutex_t mc_send_sockets_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static int mc_receive_thread_loop = 0;
+static int mc_receive_thread_running = 0;
+static pthread_t mc_receive_thread_id;
+
+static metric_map_t metric_map[] =
+{
+ { "load_one", "load", "", DS_TYPE_GAUGE, 0 },
+ { "load_five", "load", "", DS_TYPE_GAUGE, 1 },
+ { "load_fifteen", "load", "", DS_TYPE_GAUGE, 2 },
+ { "cpu_user", "cpu", "user", DS_TYPE_COUNTER, 0 },
+ { "cpu_system", "cpu", "system", DS_TYPE_COUNTER, 0 },
+ { "cpu_idle", "cpu", "idle", DS_TYPE_COUNTER, 0 },
+ { "cpu_nice", "cpu", "nice", DS_TYPE_COUNTER, 0 },
+ { "cpu_wio", "cpu", "wait", DS_TYPE_COUNTER, 0 },
+ { "mem_free", "memory", "free", DS_TYPE_GAUGE, 0 },
+ { "mem_shared", "memory", "shared", DS_TYPE_GAUGE, 0 },
+ { "mem_buffers", "memory", "buffered", DS_TYPE_GAUGE, 0 },
+ { "mem_cached", "memory", "cached", DS_TYPE_GAUGE, 0 },
+ { "mem_total", "memory", "total", DS_TYPE_GAUGE, 0 },
+ { "bytes_in", "if_octets", "", DS_TYPE_COUNTER, 0 },
+ { "bytes_out", "if_octets", "", DS_TYPE_COUNTER, 1 },
+ { "pkts_in", "if_packets", "", DS_TYPE_COUNTER, 0 },
+ { "pkts_out", "if_packets", "", DS_TYPE_COUNTER, 1 }
+};
+static size_t metric_map_len = STATIC_ARRAY_SIZE (metric_map);
+
+static c_avl_tree_t *staging_tree;
+static pthread_mutex_t staging_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static int create_sockets (socket_entry_t **ret_sockets, /* {{{ */
+ size_t *ret_sockets_num,
+ const char *node, const char *service, int listen)
+{
+ struct addrinfo ai_hints;
+ struct addrinfo *ai_list;
+ struct addrinfo *ai_ptr;
+ int ai_return;
+
+ socket_entry_t *sockets;
+ size_t sockets_num;
+
+ int status;
+
+ sockets = *ret_sockets;
+ sockets_num = *ret_sockets_num;
+
+ memset (&ai_hints, 0, sizeof (ai_hints));
+ ai_hints.ai_flags = 0;
+#ifdef AI_PASSIVE
+ ai_hints.ai_flags |= AI_PASSIVE;
+#endif
+#ifdef AI_ADDRCONFIG
+ ai_hints.ai_flags |= AI_ADDRCONFIG;
+#endif
+ ai_hints.ai_family = AF_UNSPEC;
+ ai_hints.ai_socktype = SOCK_DGRAM;
+ ai_hints.ai_protocol = IPPROTO_UDP;
+
+ ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
+ if (ai_return != 0)
+ {
+ char errbuf[1024];
+ ERROR ("gmond plugin: getaddrinfo (%s, %s) failed: %s",
+ (node == NULL) ? "(null)" : node,
+ (service == NULL) ? "(null)" : service,
+ (ai_return == EAI_SYSTEM)
+ ? sstrerror (errno, errbuf, sizeof (errbuf))
+ : gai_strerror (ai_return));
+ return (-1);
+ }
+
+ for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) /* {{{ */
+ {
+ socket_entry_t *tmp;
+
+ tmp = realloc (sockets, (sockets_num + 1) * sizeof (*sockets));
+ if (tmp == NULL)
+ {
+ ERROR ("gmond plugin: realloc failed.");
+ continue;
+ }
+ sockets = tmp;
+
+ sockets[sockets_num].fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
+ ai_ptr->ai_protocol);
+ if (sockets[sockets_num].fd < 0)
+ {
+ char errbuf[1024];
+ ERROR ("gmond plugin: socket failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ continue;
+ }
+
+ assert (sizeof (sockets[sockets_num].addr) >= ai_ptr->ai_addrlen);
+ memcpy (&sockets[sockets_num].addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
+ sockets[sockets_num].addrlen = ai_ptr->ai_addrlen;
+
+ /* Sending socket: Open only one socket and don't bind it. */
+ if (listen == 0)
+ {
+ sockets_num++;
+ break;
+ }
+ else
+ {
+ int yes = 1;
+
+ setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
+ (void *) &yes, sizeof (yes));
+ }
+
+ status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("gmond plugin: bind failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ close (sockets[sockets_num].fd);
+ continue;
+ }
+
+ if (ai_ptr->ai_family == AF_INET)
+ {
+ struct sockaddr_in *addr;
+ struct ip_mreq mreq;
+ int loop;
+
+ addr = (struct sockaddr_in *) ai_ptr->ai_addr;
+
+ if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
+ {
+ sockets_num++;
+ continue;
+ }
+
+ loop = 1;
+ setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
+ (void *) &loop, sizeof (loop));
+
+ memset (&mreq, 0, sizeof (mreq));
+ mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
+ mreq.imr_interface.s_addr = htonl (INADDR_ANY);
+ setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+ (void *) &mreq, sizeof (mreq));
+ } /* if (ai_ptr->ai_family == AF_INET) */
+ else if (ai_ptr->ai_family == AF_INET6)
+ {
+ struct sockaddr_in6 *addr;
+ struct ipv6_mreq mreq;
+ int loop;
+
+ addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
+
+ if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
+ {
+ sockets_num++;
+ continue;
+ }
+
+ loop = 1;
+ setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
+ (void *) &loop, sizeof (loop));
+
+ memset (&mreq, 0, sizeof (mreq));
+ memcpy (&mreq.ipv6mr_multiaddr,
+ &addr->sin6_addr, sizeof (addr->sin6_addr));
+ mreq.ipv6mr_interface = 0; /* any */
+ setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
+ (void *) &mreq, sizeof (mreq));
+ } /* if (ai_ptr->ai_family == AF_INET6) */
+
+ sockets_num++;
+ } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
+
+ freeaddrinfo (ai_list);
+
+ if ((*ret_sockets_num) >= sockets_num)
+ return (-1);
+
+ *ret_sockets = sockets;
+ *ret_sockets_num = sockets_num;
+ return (0);
+} /* }}} int create_sockets */
+
+static int request_meta_data (const char *host, const char *name) /* {{{ */
+{
+ Ganglia_metadata_msg msg;
+ char buffer[BUFF_SIZE];
+ unsigned int buffer_size;
+ XDR xdr;
+ size_t i;
+
+ memset (&msg, 0, sizeof (msg));
+
+ msg.id = gmetadata_request;
+ msg.Ganglia_metadata_msg_u.grequest.metric_id.host = strdup (host);
+ msg.Ganglia_metadata_msg_u.grequest.metric_id.name = strdup (name);
+
+ if ((msg.Ganglia_metadata_msg_u.grequest.metric_id.host == NULL)
+ || (msg.Ganglia_metadata_msg_u.grequest.metric_id.name == NULL))
+ {
+ sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
+ sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
+ return (-1);
+ }
+
+ memset (buffer, 0, sizeof (buffer));
+ xdrmem_create (&xdr, buffer, sizeof (buffer), XDR_ENCODE);
+
+ if (!xdr_Ganglia_metadata_msg (&xdr, &msg))
+ {
+ sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
+ sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
+ return (-1);
+ }
+
+ buffer_size = xdr_getpos (&xdr);
+
+ DEBUG ("gmond plugin: Requesting meta data for %s/%s.",
+ host, name);
+
+ pthread_mutex_lock (&mc_send_sockets_lock);
+ for (i = 0; i < mc_send_sockets_num; i++)
+ sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
+ /* flags = */ 0,
+ (struct sockaddr *) &mc_send_sockets[i].addr,
+ mc_send_sockets[i].addrlen);
+ pthread_mutex_unlock (&mc_send_sockets_lock);
+
+ sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
+ sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
+ return (0);
+} /* }}} int request_meta_data */
+
+static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
+ const char *name,
+ const char *type, const char *type_instance,
+ int values_len)
+{
+ char key[2 * DATA_MAX_NAME_LEN];
+ staging_entry_t *se;
+ int status;
+
+ if (staging_tree == NULL)
+ return (NULL);
+
+ ssnprintf (key, sizeof (key), "%s/%s/%s", host, type, type_instance);
+
+ se = NULL;
+ status = c_avl_get (staging_tree, key, (void *) &se);
+ if (status == 0)
+ return (se);
+
+ /* insert new entry */
+ se = (staging_entry_t *) malloc (sizeof (*se));
+ if (se == NULL)
+ return (NULL);
+ memset (se, 0, sizeof (*se));
+
+ sstrncpy (se->key, key, sizeof (se->key));
+ se->flags = 0;
+
+ se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
+ if (se->vl.values == NULL)
+ {
+ sfree (se);
+ return (NULL);
+ }
+ se->vl.values_len = values_len;
+
+ se->vl.time = 0;
+ se->vl.interval = 0;
+ sstrncpy (se->vl.host, host, sizeof (se->vl.host));
+ sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
+ sstrncpy (se->vl.type, type, sizeof (se->vl.type));
+ if (type_instance != NULL)
+ sstrncpy (se->vl.type_instance, type_instance,
+ sizeof (se->vl.type_instance));
+
+ status = c_avl_insert (staging_tree, se->key, se);
+ if (status != 0)
+ {
+ ERROR ("gmond plugin: c_avl_insert failed.");
+ sfree (se->vl.values);
+ sfree (se);
+ return (NULL);
+ }
+
+ return (se);
+} /* }}} staging_entry_t *staging_entry_get */
+
+static int staging_entry_submit (const char *host, const char *name, /* {{{ */
+ staging_entry_t *se)
+{
+ value_list_t vl;
+ value_t values[se->vl.values_len];
+
+ if (se->vl.interval == 0)
+ {
+ /* No meta data has been received for this metric yet. */
+ se->flags = 0;
+ pthread_mutex_unlock (&staging_lock);
+ request_meta_data (host, name);
+ return (0);
+ }
+
+ se->flags = 0;
+
+ memcpy (values, se->vl.values, sizeof (values));
+ memcpy (&vl, &se->vl, sizeof (vl));
+
+ /* Unlock before calling `plugin_dispatch_values'.. */
+ pthread_mutex_unlock (&staging_lock);
+
+ vl.values = values;
+
+ plugin_dispatch_values (&vl);
+
+ return (0);
+} /* }}} int staging_entry_submit */
+
+static int staging_entry_update (const char *host, const char *name, /* {{{ */
+ const char *type, const char *type_instance,
+ int value_index, int ds_type, value_t value)
+{
+ const data_set_t *ds;
+ staging_entry_t *se;
+
+ ds = plugin_get_ds (type);
+ if (ds == NULL)
+ {
+ ERROR ("gmond plugin: Looking up type %s failed.", type);
+ return (-1);
+ }
+
+ if (ds->ds_num <= value_index)
+ {
+ ERROR ("gmond plugin: Invalid index %i: %s has only %i data source(s).",
+ value_index, ds->type, ds->ds_num);
+ return (-1);
+ }
+
+ pthread_mutex_lock (&staging_lock);
+
+ se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
+ if (se == NULL)
+ {
+ pthread_mutex_unlock (&staging_lock);
+ ERROR ("gmond plugin: staging_entry_get failed.");
+ return (-1);
+ }
+ if (se->vl.values_len != ds->ds_num)
+ {
+ pthread_mutex_unlock (&staging_lock);
+ return (-1);
+ }
+
+ if (ds_type == DS_TYPE_COUNTER)
+ se->vl.values[value_index].counter += value.counter;
+ else if (ds_type == DS_TYPE_GAUGE)
+ se->vl.values[value_index].gauge = value.gauge;
+ se->flags |= (0x01 << value_index);
+
+ DEBUG ("gmond plugin: key = %s; flags = %i;",
+ se->key, se->flags);
+
+ /* Check if all values have been set and submit if so. */
+ if (se->flags == ((0x01 << se->vl.values_len) - 1))
+ {
+ /* `staging_lock' is unlocked in `staging_entry_submit'. */
+ staging_entry_submit (host, name, se);
+ }
+ else
+ {
+ pthread_mutex_unlock (&staging_lock);
+ }
+
+ return (0);
+} /* }}} int staging_entry_update */
+
+static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
+{
+ const char *host;
+ const char *name;
+
+ value_t value_counter;
+ value_t value_gauge;
+
+ size_t i;
+
+ /* Fill in `host', `name', `value_counter', and `value_gauge' according to
+ * the value type, or return with an error. */
+ switch (msg->id) /* {{{ */
+ {
+ case gmetric_uint:
+ {
+ Ganglia_gmetric_uint msg_uint;
+
+ msg_uint = msg->Ganglia_value_msg_u.gu_int;
+
+ host = msg_uint.metric_id.host;
+ name = msg_uint.metric_id.name;
+ value_counter.counter = (counter_t) msg_uint.ui;
+ value_gauge.gauge = (gauge_t) msg_uint.ui;
+ break;
+ }
+
+ case gmetric_string:
+ {
+ Ganglia_gmetric_string msg_string;
+ char *endptr;
+
+ msg_string = msg->Ganglia_value_msg_u.gstr;
+
+ host = msg_string.metric_id.host;
+ name = msg_string.metric_id.name;
+
+ endptr = NULL;
+ errno = 0;
+ value_counter.counter = (counter_t) strtoll (msg_string.str,
+ &endptr, /* base = */ 0);
+ if ((endptr == msg_string.str) || (errno != 0))
+ value_counter.counter = -1;
+
+ endptr = NULL;
+ errno = 0;
+ value_gauge.gauge = (gauge_t) strtod (msg_string.str, &endptr);
+ if ((endptr == msg_string.str) || (errno != 0))
+ value_gauge.gauge = NAN;
+
+ break;
+ }
+
+ case gmetric_float:
+ {
+ Ganglia_gmetric_float msg_float;
+
+ msg_float = msg->Ganglia_value_msg_u.gf;
+
+ host = msg_float.metric_id.host;
+ name = msg_float.metric_id.name;
+ value_counter.counter = (counter_t) msg_float.f;
+ value_gauge.gauge = (gauge_t) msg_float.f;
+ break;
+ }
+
+ case gmetric_double:
+ {
+ Ganglia_gmetric_double msg_double;
+
+ msg_double = msg->Ganglia_value_msg_u.gd;
+
+ host = msg_double.metric_id.host;
+ name = msg_double.metric_id.name;
+ value_counter.counter = (counter_t) msg_double.d;
+ value_gauge.gauge = (gauge_t) msg_double.d;
+ break;
+ }
+ default:
+ DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
+ return (-1);
+ } /* }}} switch (msg->id) */
+
+ assert (host != NULL);
+ assert (name != NULL);
+
+ for (i = 0; i < metric_map_len; i++)
+ {
+ if (strcmp (name, metric_map[i].ganglia_name) != 0)
+ continue;
+
+ return (staging_entry_update (host, name,
+ metric_map[i].type, metric_map[i].type_instance,
+ metric_map[i].value_index, metric_map[i].ds_type,
+ (metric_map[i].ds_type == DS_TYPE_COUNTER)
+ ? value_counter
+ : value_gauge));
+ }
+
+ DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
+
+ return (-1);
+} /* }}} int mc_handle_value_msg */
+
+static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
+{
+ switch (msg->id)
+ {
+ case gmetadata_full:
+ {
+ Ganglia_metadatadef msg_meta;
+ staging_entry_t *se;
+ const data_set_t *ds;
+ size_t i;
+
+ msg_meta = msg->Ganglia_metadata_msg_u.gfull;
+
+ if (msg_meta.metric.tmax <= 0)
+ return (-1);
+
+ for (i = 0; i < metric_map_len; i++)
+ {
+ if (strcmp (msg_meta.metric_id.name, metric_map[i].ganglia_name) == 0)
+ break;
+ }
+
+ if (i >= metric_map_len)
+ {
+ DEBUG ("gmond plugin: Not handling meta data %s.",
+ msg_meta.metric_id.name);
+ return (0);
+ }
+
+ ds = plugin_get_ds (metric_map[i].type);
+ if (ds == NULL)
+ {
+ WARNING ("gmond plugin: Could not find data set %s.",
+ metric_map[i].type);
+ return (-1);
+ }
+
+ DEBUG ("gmond plugin: Received meta data for %s/%s.",
+ msg_meta.metric_id.host, msg_meta.metric_id.name);
+
+ pthread_mutex_lock (&staging_lock);
+ se = staging_entry_get (msg_meta.metric_id.host,
+ msg_meta.metric_id.name,
+ metric_map[i].type, metric_map[i].type_instance,
+ ds->ds_num);
+ if (se != NULL)
+ se->vl.interval = (int) msg_meta.metric.tmax;
+ pthread_mutex_unlock (&staging_lock);
+
+ if (se == NULL)
+ {
+ ERROR ("gmond plugin: staging_entry_get failed.");
+ return (-1);
+ }
+
+ break;
+ }
+
+ default:
+ {
+ return (-1);
+ }
+ }
+
+ return (0);
+} /* }}} int mc_handle_metadata_msg */
+
+static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
+{
+ XDR xdr;
+ Ganglia_msg_formats format;
+
+ xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
+
+ xdr_Ganglia_msg_formats (&xdr, &format);
+ xdr_setpos (&xdr, 0);
+
+ switch (format)
+ {
+ case gmetric_ushort:
+ case gmetric_short:
+ case gmetric_int:
+ case gmetric_uint:
+ case gmetric_string:
+ case gmetric_float:
+ case gmetric_double:
+ {
+ Ganglia_value_msg msg;
+
+ memset (&msg, 0, sizeof (msg));
+ if (xdr_Ganglia_value_msg (&xdr, &msg))
+ mc_handle_value_msg (&msg);
+ break;
+ }
+
+ case gmetadata_full:
+ case gmetadata_request:
+ {
+ Ganglia_metadata_msg msg;
+ memset (&msg, 0, sizeof (msg));
+ if (xdr_Ganglia_metadata_msg (&xdr, &msg))
+ mc_handle_metadata_msg (&msg);
+ break;
+ }
+
+ default:
+ DEBUG ("gmond plugin: Unknown format: %i", format);
+ return (-1);
+ } /* switch (format) */
+
+
+ return (0);
+} /* }}} int mc_handle_metric */
+
+static int mc_handle_socket (struct pollfd *p) /* {{{ */
+{
+ char buffer[BUFF_SIZE];
+ ssize_t buffer_size;
+
+ if ((p->revents & (POLLIN | POLLPRI)) == 0)
+ {
+ p->revents = 0;
+ return (-1);
+ }
+
+ buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
+ if (buffer_size <= 0)
+ {
+ char errbuf[1024];
+ ERROR ("gmond plugin: recv failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ p->revents = 0;
+ return (-1);
+ }
+
+ mc_handle_metric (buffer, (size_t) buffer_size);
+ return (0);
+} /* }}} int mc_handle_socket */
+
+static void *mc_receive_thread (void *arg) /* {{{ */
+{
+ socket_entry_t *mc_receive_socket_entries;
+ int status;
+ size_t i;
+
+ mc_receive_socket_entries = NULL;
+ status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
+ "239.2.11.71", "8649", /* listen = */ 1);
+ if (status != 0)
+ {
+ ERROR ("gmond plugin: create_sockets failed.");
+ return ((void *) -1);
+ }
+
+ mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
+ sizeof (*mc_receive_sockets));
+ if (mc_receive_sockets == NULL)
+ {
+ ERROR ("gmond plugin: calloc failed.");
+ for (i = 0; i < mc_receive_sockets_num; i++)
+ close (mc_receive_socket_entries[i].fd);
+ free (mc_receive_socket_entries);
+ mc_receive_socket_entries = NULL;
+ mc_receive_sockets_num = 0;
+ return ((void *) -1);
+ }
+
+ for (i = 0; i < mc_receive_sockets_num; i++)
+ {
+ mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
+ mc_receive_sockets[i].events = POLLIN | POLLPRI;
+ mc_receive_sockets[i].revents = 0;
+ }
+
+ while (mc_receive_thread_loop != 0)
+ {
+ status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
+ if (status <= 0)
+ {
+ char errbuf[1024];
+ if (errno == EINTR)
+ continue;
+ ERROR ("gmond plugin: poll failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ break;
+ }
+
+ for (i = 0; i < mc_receive_sockets_num; i++)
+ {
+ if (mc_receive_sockets[i].revents != 0)
+ mc_handle_socket (mc_receive_sockets + i);
+ }
+ } /* while (mc_receive_thread_loop != 0) */
+
+ return ((void *) 0);
+} /* }}} void *mc_receive_thread */
+
+static int mc_receive_thread_start (void) /* {{{ */
+{
+ int status;
+
+ if (mc_receive_thread_running != 0)
+ return (-1);
+
+ mc_receive_thread_loop = 1;
+
+ status = pthread_create (&mc_receive_thread_id, /* attr = */ NULL,
+ mc_receive_thread, /* args = */ NULL);
+ if (status != 0)
+ {
+ ERROR ("gmond plugin: Starting receive thread failed.");
+ mc_receive_thread_loop = 0;
+ return (-1);
+ }
+
+ mc_receive_thread_running = 1;
+ return (0);
+} /* }}} int start_receive_thread */
+
+static int mc_receive_thread_stop (void) /* {{{ */
+{
+ if (mc_receive_thread_running == 0)
+ return (-1);
+
+ mc_receive_thread_loop = 0;
+
+ INFO ("gmond plugin: Stopping receive thread.");
+ pthread_kill (mc_receive_thread_id, SIGTERM);
+ pthread_join (mc_receive_thread_id, /* return value = */ NULL);
+ memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
+
+ mc_receive_thread_running = 0;
+
+ return (0);
+} /* }}} int mc_receive_thread_stop */
+
+/*
+ * TODO: Config:
+ *
+ * <Plugin gmond>
+ * MCReceiveFrom "239.2.11.71" "8649"
+ * MCSendTo "239.2.11.71" "8649"
+ * <Metric "load_one">
+ * Type "load"
+ * [TypeInstance "foo"]
+ * [Index 0]
+ * </Metric>
+ * </Plugin>
+ */
+
+static int gmond_init (void)
+{
+ create_sockets (&mc_send_sockets, &mc_send_sockets_num,
+ "239.2.11.71", "8649", /* listen = */ 0);
+
+ staging_tree = c_avl_create ((void *) strcmp);
+ if (staging_tree == NULL)
+ {
+ ERROR ("gmond plugin: c_avl_create failed.");
+ return (-1);
+ }
+
+ mc_receive_thread_start ();
+
+ return (0);
+} /* int gmond_init */
+
+static int gmond_shutdown (void)
+{
+ size_t i;
+
+ mc_receive_thread_stop ();
+
+ pthread_mutex_lock (&mc_send_sockets_lock);
+ for (i = 0; i < mc_send_sockets_num; i++)
+ {
+ close (mc_send_sockets[i].fd);
+ mc_send_sockets[i].fd = -1;
+ }
+ sfree (mc_send_sockets);
+ mc_send_sockets_num = 0;
+ pthread_mutex_unlock (&mc_send_sockets_lock);
+
+
+ return (0);
+} /* int gmond_shutdown */
+
+void module_register (void)
+{
+ plugin_register_init ("gmond", gmond_init);
+ plugin_register_shutdown ("gmond", gmond_shutdown);
+}
+
+/* vim: set sw=2 sts=2 et fdm=marker : */
projects / collectd.git / commitdiff