src/sensors.c

   1 /**
   2  * collectd - src/sensors.c
   3  * Copyright (C) 2005-2008  Florian octo Forster
   4  * Copyright (C) 2006       Luboš Staněk
   5  *
   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; only version 2 of the License is applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  *
  19  * Authors:
  20  *   Florian octo Forster <octo at collectd.org>
  21  *
  22  *   Lubos Stanek <lubek at users.sourceforge.net> Wed Oct 27, 2006
  23  *   - config ExtendedSensorNaming option
  24  *   - precise sensor feature selection (chip-bus-address/type-feature)
  25  *     with ExtendedSensorNaming
  26  *   - more sensor features (finite list)
  27  *   - honor sensors.conf's ignored
  28  *   - config Sensor option
  29  *   - config IgnoreSelected option
  30  *
  31  *   Henrique de Moraes Holschuh <hmh at debian.org>
  32  *   - use default libsensors config file on API 0x400
  33  *   - config SensorConfigFile option
  34  **/
  35
  36 #include "collectd.h"
  37
  38 #include "common.h"
  39 #include "plugin.h"
  40 #include "utils_ignorelist.h"
  41
  42 #if defined(HAVE_SENSORS_SENSORS_H)
  43 #include <sensors/sensors.h>
  44 #endif
  45
  46 #if !defined(SENSORS_API_VERSION)
  47 #define SENSORS_API_VERSION 0x000
  48 #endif
  49
  50 /*
  51  * The sensors library prior to version 3.0 (internal version 0x400) didn't
  52  * report the type of values, only a name. The following lists are there to
  53  * convert from the names to the type. They are not used with the new
  54  * interface.
  55  */
  56 #if SENSORS_API_VERSION < 0x400
  57 static char *sensor_type_name_map[] = {
  58 #define SENSOR_TYPE_VOLTAGE 0
  59     "voltage",
  60 #define SENSOR_TYPE_FANSPEED 1
  61     "fanspeed",
  62 #define SENSOR_TYPE_TEMPERATURE 2
  63     "temperature",
  64 #define SENSOR_TYPE_POWER 3
  65     "power",
  66 #define SENSOR_TYPE_UNKNOWN 4
  67     NULL};
  68
  69 struct sensors_labeltypes_s {
  70   char *label;
  71   int type;
  72 };
  73 typedef struct sensors_labeltypes_s sensors_labeltypes_t;
  74
  75 /* finite list of known labels extracted from lm_sensors */
  76 static sensors_labeltypes_t known_features[] = {
  77     {"fan1", SENSOR_TYPE_FANSPEED},
  78     {"fan2", SENSOR_TYPE_FANSPEED},
  79     {"fan3", SENSOR_TYPE_FANSPEED},
  80     {"fan4", SENSOR_TYPE_FANSPEED},
  81     {"fan5", SENSOR_TYPE_FANSPEED},
  82     {"fan6", SENSOR_TYPE_FANSPEED},
  83     {"fan7", SENSOR_TYPE_FANSPEED},
  84     {"AIN2", SENSOR_TYPE_VOLTAGE},
  85     {"AIN1", SENSOR_TYPE_VOLTAGE},
  86     {"in10", SENSOR_TYPE_VOLTAGE},
  87     {"in9", SENSOR_TYPE_VOLTAGE},
  88     {"in8", SENSOR_TYPE_VOLTAGE},
  89     {"in7", SENSOR_TYPE_VOLTAGE},
  90     {"in6", SENSOR_TYPE_VOLTAGE},
  91     {"in5", SENSOR_TYPE_VOLTAGE},
  92     {"in4", SENSOR_TYPE_VOLTAGE},
  93     {"in3", SENSOR_TYPE_VOLTAGE},
  94     {"in2", SENSOR_TYPE_VOLTAGE},
  95     {"in0", SENSOR_TYPE_VOLTAGE},
  96     {"CPU_Temp", SENSOR_TYPE_TEMPERATURE},
  97     {"remote_temp", SENSOR_TYPE_TEMPERATURE},
  98     {"temp1", SENSOR_TYPE_TEMPERATURE},
  99     {"temp2", SENSOR_TYPE_TEMPERATURE},
 100     {"temp3", SENSOR_TYPE_TEMPERATURE},
 101     {"temp4", SENSOR_TYPE_TEMPERATURE},
 102     {"temp5", SENSOR_TYPE_TEMPERATURE},
 103     {"temp6", SENSOR_TYPE_TEMPERATURE},
 104     {"temp7", SENSOR_TYPE_TEMPERATURE},
 105     {"temp", SENSOR_TYPE_TEMPERATURE},
 106     {"Vccp2", SENSOR_TYPE_VOLTAGE},
 107     {"Vccp1", SENSOR_TYPE_VOLTAGE},
 108     {"vdd", SENSOR_TYPE_VOLTAGE},
 109     {"vid5", SENSOR_TYPE_VOLTAGE},
 110     {"vid4", SENSOR_TYPE_VOLTAGE},
 111     {"vid3", SENSOR_TYPE_VOLTAGE},
 112     {"vid2", SENSOR_TYPE_VOLTAGE},
 113     {"vid1", SENSOR_TYPE_VOLTAGE},
 114     {"vid", SENSOR_TYPE_VOLTAGE},
 115     {"vin4", SENSOR_TYPE_VOLTAGE},
 116     {"vin3", SENSOR_TYPE_VOLTAGE},
 117     {"vin2", SENSOR_TYPE_VOLTAGE},
 118     {"vin1", SENSOR_TYPE_VOLTAGE},
 119     {"voltbatt", SENSOR_TYPE_VOLTAGE},
 120     {"volt12", SENSOR_TYPE_VOLTAGE},
 121     {"volt5", SENSOR_TYPE_VOLTAGE},
 122     {"vrm", SENSOR_TYPE_VOLTAGE},
 123     {"5.0V", SENSOR_TYPE_VOLTAGE},
 124     {"5V", SENSOR_TYPE_VOLTAGE},
 125     {"3.3V", SENSOR_TYPE_VOLTAGE},
 126     {"2.5V", SENSOR_TYPE_VOLTAGE},
 127     {"2.0V", SENSOR_TYPE_VOLTAGE},
 128     {"12V", SENSOR_TYPE_VOLTAGE},
 129     {"power1", SENSOR_TYPE_POWER}};
 130 static int known_features_num = STATIC_ARRAY_SIZE(known_features);
 131 /* end new naming */
 132 #endif /* SENSORS_API_VERSION < 0x400 */
 133
 134 static const char *config_keys[] = {"Sensor", "IgnoreSelected",
 135                                     "SensorConfigFile", "UseLabels"};
 136 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
 137
 138 #if SENSORS_API_VERSION < 0x400
 139 typedef struct featurelist {
 140   const sensors_chip_name *chip;
 141   const sensors_feature_data *data;
 142   int type;
 143   struct featurelist *next;
 144 } featurelist_t;
 145
 146 #ifndef SENSORS_CONF_PATH
 147 #define SENSORS_CONF_PATH "/etc/sensors.conf"
 148 #endif
 149 static char *conffile = SENSORS_CONF_PATH;
 150 /* #endif SENSORS_API_VERSION < 0x400 */
 151
 152 #elif (SENSORS_API_VERSION >= 0x400)
 153 typedef struct featurelist {
 154   const sensors_chip_name *chip;
 155   const sensors_feature *feature;
 156   const sensors_subfeature *subfeature;
 157   struct featurelist *next;
 158 } featurelist_t;
 159
 160 static char *conffile = NULL;
 161 static _Bool use_labels = 0;
 162 #endif
 163
 164 static featurelist_t *first_feature = NULL;
 165 static ignorelist_t *sensor_list;
 166
 167 #if SENSORS_API_VERSION < 0x400
 168 /* full chip name logic borrowed from lm_sensors */
 169 static int sensors_snprintf_chip_name(char *buf, size_t buf_size,
 170                                       const sensors_chip_name *chip) {
 171   int status = -1;
 172
 173   if (chip->bus == SENSORS_CHIP_NAME_BUS_ISA) {
 174     status = snprintf(buf, buf_size, "%s-isa-%04x", chip->prefix, chip->addr);
 175   } else if (chip->bus == SENSORS_CHIP_NAME_BUS_DUMMY) {
 176     status = snprintf(buf, buf_size, "%s-%s-%04x", chip->prefix, chip->busname,
 177                       chip->addr);
 178   } else {
 179     status = snprintf(buf, buf_size, "%s-i2c-%d-%02x", chip->prefix, chip->bus,
 180                       chip->addr);
 181   }
 182
 183   return status;
 184 } /* int sensors_snprintf_chip_name */
 185
 186 static int sensors_feature_name_to_type(const char *name) {
 187   /* Yes, this is slow, but it's only ever done during initialization, so
 188    * it's a one time cost.. */
 189   for (int i = 0; i < known_features_num; i++)
 190     if (strcasecmp(known_features[i].label, name) == 0)
 191       return known_features[i].type;
 192
 193   return SENSOR_TYPE_UNKNOWN;
 194 } /* int sensors_feature_name_to_type */
 195 #endif
 196
 197 static int sensors_config(const char *key, const char *value) {
 198   if (sensor_list == NULL)
 199     sensor_list = ignorelist_create(1);
 200
 201   /* TODO: This setting exists for compatibility with old versions of
 202    * lm-sensors. Remove support for those ancient versions in the next
 203    * major release. */
 204   if (strcasecmp(key, "SensorConfigFile") == 0) {
 205     char *tmp = strdup(value);
 206     if (tmp != NULL) {
 207       sfree(conffile);
 208       conffile = tmp;
 209     }
 210   } else if (strcasecmp(key, "Sensor") == 0) {
 211     if (ignorelist_add(sensor_list, value)) {
 212       ERROR("sensors plugin: "
 213             "Cannot add value to ignorelist.");
 214       return 1;
 215     }
 216   } else if (strcasecmp(key, "IgnoreSelected") == 0) {
 217     ignorelist_set_invert(sensor_list, 1);
 218     if (IS_TRUE(value))
 219       ignorelist_set_invert(sensor_list, 0);
 220   }
 221 #if (SENSORS_API_VERSION >= 0x400)
 222   else if (strcasecmp(key, "UseLabels") == 0) {
 223     use_labels = IS_TRUE(value) ? 1 : 0;
 224   }
 225 #endif
 226   else {
 227     return -1;
 228   }
 229
 230   return 0;
 231 }
 232
 233 static void sensors_free_features(void) {
 234   featurelist_t *nextft;
 235
 236   if (first_feature == NULL)
 237     return;
 238
 239   sensors_cleanup();
 240
 241   for (featurelist_t *thisft = first_feature; thisft != NULL; thisft = nextft) {
 242     nextft = thisft->next;
 243     sfree(thisft);
 244   }
 245   first_feature = NULL;
 246 }
 247
 248 static int sensors_load_conf(void) {
 249   static int call_once = 0;
 250
 251   FILE *fh = NULL;
 252   featurelist_t *last_feature = NULL;
 253
 254   const sensors_chip_name *chip;
 255   int chip_num;
 256
 257   int status;
 258
 259   if (call_once)
 260     return 0;
 261
 262   call_once = 1;
 263
 264   if (conffile != NULL) {
 265     fh = fopen(conffile, "r");
 266     if (fh == NULL) {
 267       char errbuf[1024];
 268       ERROR("sensors plugin: fopen(%s) failed: %s", conffile,
 269             sstrerror(errno, errbuf, sizeof(errbuf)));
 270       return -1;
 271     }
 272   }
 273
 274   status = sensors_init(fh);
 275   if (fh)
 276     fclose(fh);
 277
 278   if (status != 0) {
 279     ERROR("sensors plugin: Cannot initialize sensors. "
 280           "Data will not be collected.");
 281     return -1;
 282   }
 283
 284 #if SENSORS_API_VERSION < 0x400
 285   chip_num = 0;
 286   while ((chip = sensors_get_detected_chips(&chip_num)) != NULL) {
 287     int feature_num0 = 0;
 288     int feature_num1 = 0;
 289
 290     while (42) {
 291       const sensors_feature_data *feature;
 292       int feature_type;
 293       featurelist_t *fl;
 294
 295       feature = sensors_get_all_features(*chip, &feature_num0, &feature_num1);
 296
 297       /* Check if all features have been read. */
 298       if (feature == NULL)
 299         break;
 300
 301       /* "master features" only */
 302       if (feature->mapping != SENSORS_NO_MAPPING) {
 303         DEBUG("sensors plugin: sensors_load_conf: "
 304               "Ignoring subfeature `%s', "
 305               "because (feature->mapping "
 306               "!= SENSORS_NO_MAPPING).",
 307               feature->name);
 308         continue;
 309       }
 310
 311       /* skip ignored in sensors.conf */
 312       if (sensors_get_ignored(*chip, feature->number) == 0) {
 313         DEBUG("sensors plugin: sensors_load_conf: "
 314               "Ignoring subfeature `%s', "
 315               "because "
 316               "`sensors_get_ignored' told "
 317               "me so.",
 318               feature->name);
 319         continue;
 320       }
 321
 322       feature_type = sensors_feature_name_to_type(feature->name);
 323       if (feature_type == SENSOR_TYPE_UNKNOWN) {
 324         DEBUG("sensors plugin: sensors_load_conf: "
 325               "Ignoring subfeature `%s', "
 326               "because its type is "
 327               "unknown.",
 328               feature->name);
 329         continue;
 330       }
 331
 332       fl = calloc(1, sizeof(*fl));
 333       if (fl == NULL) {
 334         ERROR("sensors plugin: calloc failed.");
 335         continue;
 336       }
 337
 338       fl->chip = chip;
 339       fl->data = feature;
 340       fl->type = feature_type;
 341
 342       if (first_feature == NULL)
 343         first_feature = fl;
 344       else
 345         last_feature->next = fl;
 346       last_feature = fl;
 347     } /* while sensors_get_all_features */
 348   }   /* while sensors_get_detected_chips */
 349 /* #endif SENSORS_API_VERSION < 0x400 */
 350
 351 #elif (SENSORS_API_VERSION >= 0x400)
 352   chip_num = 0;
 353   while ((chip = sensors_get_detected_chips(NULL, &chip_num)) != NULL) {
 354     const sensors_feature *feature;
 355     int feature_num = 0;
 356
 357     while ((feature = sensors_get_features(chip, &feature_num)) != NULL) {
 358       const sensors_subfeature *subfeature;
 359       int subfeature_num = 0;
 360
 361       /* Only handle voltage, fanspeeds and temperatures */
 362       if ((feature->type != SENSORS_FEATURE_IN) &&
 363           (feature->type != SENSORS_FEATURE_FAN) &&
 364           (feature->type != SENSORS_FEATURE_TEMP) &&
 365 #if SENSORS_API_VERSION >= 0x402
 366           (feature->type != SENSORS_FEATURE_CURR) &&
 367 #endif
 368           (feature->type != SENSORS_FEATURE_POWER)) {
 369         DEBUG("sensors plugin: sensors_load_conf: "
 370               "Ignoring feature `%s', "
 371               "because its type is not "
 372               "supported.",
 373               feature->name);
 374         continue;
 375       }
 376
 377       while ((subfeature = sensors_get_all_subfeatures(
 378                   chip, feature, &subfeature_num)) != NULL) {
 379         featurelist_t *fl;
 380
 381         if ((subfeature->type != SENSORS_SUBFEATURE_IN_INPUT) &&
 382             (subfeature->type != SENSORS_SUBFEATURE_FAN_INPUT) &&
 383             (subfeature->type != SENSORS_SUBFEATURE_TEMP_INPUT) &&
 384 #if SENSORS_API_VERSION >= 0x402
 385             (subfeature->type != SENSORS_SUBFEATURE_CURR_INPUT) &&
 386 #endif
 387             (subfeature->type != SENSORS_SUBFEATURE_POWER_INPUT))
 388           continue;
 389
 390         fl = calloc(1, sizeof(*fl));
 391         if (fl == NULL) {
 392           ERROR("sensors plugin: calloc failed.");
 393           continue;
 394         }
 395
 396         fl->chip = chip;
 397         fl->feature = feature;
 398         fl->subfeature = subfeature;
 399
 400         if (first_feature == NULL)
 401           first_feature = fl;
 402         else
 403           last_feature->next = fl;
 404         last_feature = fl;
 405       } /* while (subfeature) */
 406     }   /* while (feature) */
 407   }     /* while (chip) */
 408 #endif /* (SENSORS_API_VERSION >= 0x400) */
 409
 410   if (first_feature == NULL) {
 411     sensors_cleanup();
 412     INFO("sensors plugin: lm_sensors reports no "
 413          "features. Data will not be collected.");
 414     return -1;
 415   }
 416
 417   return 0;
 418 } /* int sensors_load_conf */
 419
 420 static int sensors_shutdown(void) {
 421   sensors_free_features();
 422   ignorelist_free(sensor_list);
 423
 424   return 0;
 425 } /* int sensors_shutdown */
 426
 427 static void sensors_submit(const char *plugin_instance, const char *type,
 428                            const char *type_instance, double value) {
 429   char match_key[1024];
 430   int status;
 431
 432   value_list_t vl = VALUE_LIST_INIT;
 433
 434   status = snprintf(match_key, sizeof(match_key), "%s/%s-%s", plugin_instance,
 435                     type, type_instance);
 436   if (status < 1)
 437     return;
 438
 439   if (sensor_list != NULL) {
 440     DEBUG("sensors plugin: Checking ignorelist for `%s'", match_key);
 441     if (ignorelist_match(sensor_list, match_key))
 442       return;
 443   }
 444
 445   vl.values = &(value_t){.gauge = value};
 446   vl.values_len = 1;
 447
 448   sstrncpy(vl.plugin, "sensors", sizeof(vl.plugin));
 449   sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
 450   sstrncpy(vl.type, type, sizeof(vl.type));
 451   sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
 452
 453   plugin_dispatch_values(&vl);
 454 } /* void sensors_submit */
 455
 456 static int sensors_read(void) {
 457   if (sensors_load_conf() != 0)
 458     return -1;
 459
 460 #if SENSORS_API_VERSION < 0x400
 461   for (featurelist_t *fl = first_feature; fl != NULL; fl = fl->next) {
 462     double value;
 463     int status;
 464     char plugin_instance[DATA_MAX_NAME_LEN];
 465     char type_instance[DATA_MAX_NAME_LEN];
 466
 467     status = sensors_get_feature(*fl->chip, fl->data->number, &value);
 468     if (status < 0)
 469       continue;
 470
 471     status = sensors_snprintf_chip_name(plugin_instance,
 472                                         sizeof(plugin_instance), fl->chip);
 473     if (status < 0)
 474       continue;
 475
 476     sstrncpy(type_instance, fl->data->name, sizeof(type_instance));
 477
 478     sensors_submit(plugin_instance, sensor_type_name_map[fl->type],
 479                    type_instance, value);
 480   } /* for fl = first_feature .. NULL */
 481 /* #endif SENSORS_API_VERSION < 0x400 */
 482
 483 #elif (SENSORS_API_VERSION >= 0x400)
 484   for (featurelist_t *fl = first_feature; fl != NULL; fl = fl->next) {
 485     double value;
 486     int status;
 487     char plugin_instance[DATA_MAX_NAME_LEN];
 488     char type_instance[DATA_MAX_NAME_LEN];
 489     char *sensor_label;
 490     const char *type;
 491
 492     status = sensors_get_value(fl->chip, fl->subfeature->number, &value);
 493     if (status < 0)
 494       continue;
 495
 496     status = sensors_snprintf_chip_name(plugin_instance,
 497                                         sizeof(plugin_instance), fl->chip);
 498     if (status < 0)
 499       continue;
 500
 501     if (use_labels) {
 502       sensor_label = sensors_get_label(fl->chip, fl->feature);
 503       sstrncpy(type_instance, sensor_label, sizeof(type_instance));
 504       free(sensor_label);
 505     } else {
 506       sstrncpy(type_instance, fl->feature->name, sizeof(type_instance));
 507     }
 508
 509     if (fl->feature->type == SENSORS_FEATURE_IN)
 510       type = "voltage";
 511     else if (fl->feature->type == SENSORS_FEATURE_FAN)
 512       type = "fanspeed";
 513     else if (fl->feature->type == SENSORS_FEATURE_TEMP)
 514       type = "temperature";
 515     else if (fl->feature->type == SENSORS_FEATURE_POWER)
 516       type = "power";
 517 #if SENSORS_API_VERSION >= 0x402
 518     else if (fl->feature->type == SENSORS_FEATURE_CURR)
 519       type = "current";
 520 #endif
 521     else
 522       continue;
 523
 524     sensors_submit(plugin_instance, type, type_instance, value);
 525   } /* for fl = first_feature .. NULL */
 526 #endif /* (SENSORS_API_VERSION >= 0x400) */
 527
 528   return 0;
 529 } /* int sensors_read */
 530
 531 void module_register(void) {
 532   plugin_register_config("sensors", sensors_config, config_keys,
 533                          config_keys_num);
 534   plugin_register_read("sensors", sensors_read);
 535   plugin_register_shutdown("sensors", sensors_shutdown);
 536 } /* void module_register */