void
classifierd_run(void)
{
struct ovsdb_idl_txn *txn;
/* Process a batch of messages from OVSDB. */
ovsdb_idl_run(idl);
if (ovsdb_idl_is_lock_contended(idl)) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
VLOG_ERR_RL(&rl, "Another classifierd process is running, "
"disabling this process until it goes away");
return;
} else if (!ovsdb_idl_has_lock(idl)) {
return;
}
/* Nothing to do until system has been configured, i.e. cur_cfg > 0. */
if (!classifierd_system_is_configured()) {
return;
}
/* Update the local configuration and push any changes to the dB. */
txn = ovsdb_idl_txn_create(idl);
if (classifierd_reconfigure()) {
VLOG_DBG("%s: Committing changes\n",__FUNCTION__);
/* Some OVSDB write needs to happen. */
ovsdb_idl_txn_commit_block(txn);
}
ovsdb_idl_txn_destroy(txn);
return;
} /* classifierd_run */
// create a new locl_subsystem object
static struct locl_subsystem *
add_subsystem(const struct ovsrec_subsystem *ovsrec_subsys)
{
struct locl_subsystem *result;
int rc;
int idx;
struct ovsdb_idl_txn *txn;
struct ovsrec_temp_sensor **sensor_array;
int sensor_idx;
int sensor_count;
const char *dir;
const YamlThermalInfo *info;
// create and initialize basic subsystem information
VLOG_DBG("Adding new subsystem %s", ovsrec_subsys->name);
result = (struct locl_subsystem *)malloc(sizeof(struct locl_subsystem));
memset(result, 0, sizeof(struct locl_subsystem));
(void)shash_add(&subsystem_data, ovsrec_subsys->name, (void *)result);
result->name = strdup(ovsrec_subsys->name);
result->marked = false;
result->marked = true;
result->parent_subsystem = NULL; // OPS_TODO: find parent subsystem
shash_init(&result->subsystem_sensors);
// use a default if the hw_desc_dir has not been populated
dir = ovsrec_subsys->hw_desc_dir;
if (dir == NULL || strlen(dir) == 0) {
VLOG_ERR("No h/w description directory for subsystem %s",
ovsrec_subsys->name);
return(NULL);
}
// since this is a new subsystem, load all of the hardware description
// information about devices and sensors (just for this subsystem).
// parse sensors and device data for subsystem
rc = yaml_add_subsystem(yaml_handle, ovsrec_subsys->name, dir);
if (rc != 0) {
VLOG_ERR("Error reading h/w description files for subsystem %s",
ovsrec_subsys->name);
return(NULL);
}
// need devices data
rc = yaml_parse_devices(yaml_handle, ovsrec_subsys->name);
if (rc != 0) {
VLOG_ERR("Unable to parse subsystem %s devices file (in %s)",
ovsrec_subsys->name, dir);
return(NULL);
}
// need thermal (sensor) data
rc = yaml_parse_thermal(yaml_handle, ovsrec_subsys->name);
if (rc != 0) {
VLOG_ERR("Unable to parse subsystem %s thermal file (in %s)",
ovsrec_subsys->name, dir);
return(NULL);
}
// get the thermal info, need it for shutdown flag
info = yaml_get_thermal_info(yaml_handle, ovsrec_subsys->name);
result->emergency_shutdown = info->auto_shutdown;
// OPS_TODO: the thermal info has a polling period, but when we
// OPS_TODO: have multiple subsystems, that could be tricky to
// OPS_TODO: implement if there are different polling periods.
// OPS_TODO: For now, hardware the polling period to 5 seconds.
// prepare to add sensors to db
sensor_idx = 0;
sensor_count = yaml_get_sensor_count(yaml_handle, ovsrec_subsys->name);
if (sensor_count <= 0) {
return(NULL);
}
result->valid = true;
// subsystem db object has reference array for sensors
sensor_array = (struct ovsrec_temp_sensor **)malloc(sensor_count * sizeof(struct ovsrec_temp_sensor *));
memset(sensor_array, 0, sensor_count * sizeof(struct ovsrec_temp_sensor *));
txn = ovsdb_idl_txn_create(idl);
VLOG_DBG("There are %d sensors in subsystem %s", sensor_count, ovsrec_subsys->name);
for (idx = 0; idx < sensor_count; idx++) {
const YamlSensor *sensor = yaml_get_sensor(yaml_handle, ovsrec_subsys->name, idx);
struct ovsrec_temp_sensor *ovs_sensor;
char *sensor_name = NULL;
struct locl_sensor *new_sensor;
VLOG_DBG("Adding sensor %d (%s) in subsystem %s",
sensor->number,
sensor->location,
ovsrec_subsys->name);
// create a name for the sensor from the subsystem name and the
// sensor number
asprintf(&sensor_name, "%s-%d", ovsrec_subsys->name, sensor->number);
// allocate and initialize basic sensor information
new_sensor = (struct locl_sensor *)malloc(sizeof(struct locl_sensor));
new_sensor->name = sensor_name;
new_sensor->subsystem = result;
new_sensor->yaml_sensor = sensor;
new_sensor->min = 1000000;
new_sensor->max = -1000000;
new_sensor->temp = 0;
new_sensor->status = SENSOR_STATUS_NORMAL;
new_sensor->fan_speed = SENSOR_FAN_NORMAL;
new_sensor->test_temp = -1; // no test temperature override set
// try to populate sensor information with real data
tempd_read_sensor(new_sensor);
// add sensor to subsystem sensor dictionary
shash_add(&result->subsystem_sensors, sensor_name, (void *)new_sensor);
// add sensor to global sensor dictionary
shash_add(&sensor_data, sensor_name, (void *)new_sensor);
// look for existing Temp_sensor rows
ovs_sensor = lookup_sensor(sensor_name);
if (ovs_sensor == NULL) {
// existing sensor doesn't exist in db, create it
ovs_sensor = ovsrec_temp_sensor_insert(txn);
}
// set initial data
ovsrec_temp_sensor_set_name(ovs_sensor, sensor_name);
ovsrec_temp_sensor_set_status(ovs_sensor,
sensor_status_to_string(new_sensor->status));
ovsrec_temp_sensor_set_temperature(ovs_sensor, new_sensor->temp);
ovsrec_temp_sensor_set_min(ovs_sensor, new_sensor->min);
ovsrec_temp_sensor_set_max(ovs_sensor, new_sensor->max);
ovsrec_temp_sensor_set_fan_state(ovs_sensor,
sensor_speed_to_string(new_sensor->fan_speed));
ovsrec_temp_sensor_set_location(ovs_sensor, sensor->location);
// add sensor to subsystem reference list
sensor_array[sensor_idx++] = ovs_sensor;
}
ovsrec_subsystem_set_temp_sensors(ovsrec_subsys, sensor_array, sensor_count);
// execute transaction
ovsdb_idl_txn_commit_block(txn);
ovsdb_idl_txn_destroy(txn);
free(sensor_array);
return(result);
}