2 * collectd - src/ethstat.c
3 * Copyright (C) 2011 Cyril Feraudet
4 * Copyright (C) 2012 Florian "octo" Forster
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 * Cyril Feraudet <cyril at feraudet.com>
22 * Florian "octo" Forster <octo@collectd.org>
29 #include "utils_avltree.h"
30 #include "utils_complain.h"
33 # include <sys/ioctl.h>
38 #if HAVE_LINUX_SOCKIOS_H
39 # include <linux/sockios.h>
41 #if HAVE_LINUX_ETHTOOL_H
42 # include <linux/ethtool.h>
47 char type[DATA_MAX_NAME_LEN];
48 char type_instance[DATA_MAX_NAME_LEN];
50 typedef struct value_map_s value_map_t;
52 static char **interfaces = NULL;
53 static size_t interfaces_num = 0;
55 static c_avl_tree_t *value_map = NULL;
57 static _Bool collect_mapped_only = 0;
59 static int ethstat_add_interface (const oconfig_item_t *ci) /* {{{ */
64 tmp = realloc (interfaces,
65 sizeof (*interfaces) * (interfaces_num + 1));
69 interfaces[interfaces_num] = NULL;
71 status = cf_util_get_string (ci, interfaces + interfaces_num);
76 INFO("ethstat plugin: Registered interface %s",
77 interfaces[interfaces_num - 1]);
80 } /* }}} int ethstat_add_interface */
82 static int ethstat_add_map (const oconfig_item_t *ci) /* {{{ */
88 if ((ci->values_num < 2)
89 || (ci->values_num > 3)
90 || (ci->values[0].type != OCONFIG_TYPE_STRING)
91 || (ci->values[1].type != OCONFIG_TYPE_STRING)
92 || ((ci->values_num == 3)
93 && (ci->values[2].type != OCONFIG_TYPE_STRING)))
95 ERROR ("ethstat plugin: The %s option requires "
96 "two or three string arguments.", ci->key);
100 key = strdup (ci->values[0].value.string);
103 ERROR ("ethstat plugin: strdup(3) failed.");
107 map = calloc (1, sizeof (*map));
111 ERROR ("ethstat plugin: calloc failed.");
115 sstrncpy (map->type, ci->values[1].value.string, sizeof (map->type));
116 if (ci->values_num == 3)
117 sstrncpy (map->type_instance, ci->values[2].value.string,
118 sizeof (map->type_instance));
120 if (value_map == NULL)
122 value_map = c_avl_create ((int (*) (const void *, const void *)) strcmp);
123 if (value_map == NULL)
127 ERROR ("ethstat plugin: c_avl_create() failed.");
132 status = c_avl_insert (value_map,
138 ERROR ("ethstat plugin: Multiple mappings for \"%s\".", key);
140 ERROR ("ethstat plugin: c_avl_insert(\"%s\") failed.", key);
148 } /* }}} int ethstat_add_map */
150 static int ethstat_config (oconfig_item_t *ci) /* {{{ */
152 for (int i = 0; i < ci->children_num; i++)
154 oconfig_item_t *child = ci->children + i;
156 if (strcasecmp ("Interface", child->key) == 0)
157 ethstat_add_interface (child);
158 else if (strcasecmp ("Map", child->key) == 0)
159 ethstat_add_map (child);
160 else if (strcasecmp ("MappedOnly", child->key) == 0)
161 (void) cf_util_get_boolean (child, &collect_mapped_only);
163 WARNING ("ethstat plugin: The config option \"%s\" is unknown.",
170 static void ethstat_submit_value (const char *device,
171 const char *type_instance, derive_t value)
173 static c_complain_t complain_no_map = C_COMPLAIN_INIT_STATIC;
176 value_list_t vl = VALUE_LIST_INIT;
177 value_map_t *map = NULL;
179 if (value_map != NULL)
180 c_avl_get (value_map, type_instance, (void *) &map);
182 /* If the "MappedOnly" option is specified, ignore unmapped values. */
183 if (collect_mapped_only && (map == NULL))
185 if (value_map == NULL)
186 c_complain (LOG_WARNING, &complain_no_map,
187 "ethstat plugin: The \"MappedOnly\" option has been set to true, "
188 "but no mapping has been configured. All values will be ignored!");
192 values[0].derive = value;
196 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
197 sstrncpy (vl.plugin, "ethstat", sizeof (vl.plugin));
198 sstrncpy (vl.plugin_instance, device, sizeof (vl.plugin_instance));
201 sstrncpy (vl.type, map->type, sizeof (vl.type));
202 sstrncpy (vl.type_instance, map->type_instance,
203 sizeof (vl.type_instance));
207 sstrncpy (vl.type, "derive", sizeof (vl.type));
208 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
211 plugin_dispatch_values (&vl);
214 static int ethstat_read_interface (char *device)
217 struct ethtool_gstrings *strings;
218 struct ethtool_stats *stats;
224 fd = socket(AF_INET, SOCK_DGRAM, /* protocol = */ 0);
228 ERROR("ethstat plugin: Failed to open control socket: %s",
229 sstrerror (errno, errbuf, sizeof (errbuf)));
233 struct ethtool_drvinfo drvinfo = {
234 .cmd = ETHTOOL_GDRVINFO
238 .ifr_data = (void *) &drvinfo
241 sstrncpy(req.ifr_name, device, sizeof (req.ifr_name));
243 status = ioctl (fd, SIOCETHTOOL, &req);
248 ERROR ("ethstat plugin: Failed to get driver information "
249 "from %s: %s", device,
250 sstrerror (errno, errbuf, sizeof (errbuf)));
254 n_stats = (size_t) drvinfo.n_stats;
258 ERROR("ethstat plugin: No stats available for %s", device);
262 strings_size = sizeof (struct ethtool_gstrings)
263 + (n_stats * ETH_GSTRING_LEN);
264 stats_size = sizeof (struct ethtool_stats)
265 + (n_stats * sizeof (uint64_t));
267 strings = malloc (strings_size);
268 stats = malloc (stats_size);
269 if ((strings == NULL) || (stats == NULL))
274 ERROR("ethstat plugin: malloc failed.");
278 strings->cmd = ETHTOOL_GSTRINGS;
279 strings->string_set = ETH_SS_STATS;
280 strings->len = n_stats;
281 req.ifr_data = (void *) strings;
282 status = ioctl (fd, SIOCETHTOOL, &req);
289 ERROR ("ethstat plugin: Cannot get strings from %s: %s",
291 sstrerror (errno, errbuf, sizeof (errbuf)));
295 stats->cmd = ETHTOOL_GSTATS;
296 stats->n_stats = n_stats;
297 req.ifr_data = (void *) stats;
298 status = ioctl (fd, SIOCETHTOOL, &req);
305 ERROR("ethstat plugin: Reading statistics from %s failed: %s",
307 sstrerror (errno, errbuf, sizeof (errbuf)));
311 for (size_t i = 0; i < n_stats; i++)
315 stat_name = (void *) &strings->data[i * ETH_GSTRING_LEN];
316 /* Remove leading spaces in key name */
317 while (isspace ((int) *stat_name))
320 DEBUG("ethstat plugin: device = \"%s\": %s = %"PRIu64,
321 device, stat_name, (uint64_t) stats->data[i]);
322 ethstat_submit_value (device,
323 stat_name, (derive_t) stats->data[i]);
331 } /* }}} ethstat_read_interface */
333 static int ethstat_read(void)
335 for (size_t i = 0; i < interfaces_num; i++)
336 ethstat_read_interface (interfaces[i]);
341 static int ethstat_shutdown (void)
346 if (value_map == NULL)
349 while (c_avl_pick (value_map, &key, &value) == 0)
355 c_avl_destroy (value_map);
361 void module_register (void)
363 plugin_register_complex_config ("ethstat", ethstat_config);
364 plugin_register_read ("ethstat", ethstat_read);
365 plugin_register_shutdown ("ethstat", ethstat_shutdown);
368 /* vim: set sw=2 sts=2 et fdm=marker : */