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// Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build linux
// +build linux
package sysfs
import (
"errors"
"os"
"path/filepath"
"strings"
"syscall"
fsp "io/fs"
"github.com/prometheus/procfs/internal/util"
)
// ClassThermalZoneStats contains info from files in /sys/class/thermal/thermal_zone<zone>
// for a single <zone>.
// https://www.kernel.org/doc/Documentation/thermal/sysfs-api.txt
type ClassThermalZoneStats struct {
Name string // The name of the zone from the directory structure.
Type string // The type of thermal zone.
Temp int64 // Temperature in millidegree Celsius.
Policy string // One of the various thermal governors used for a particular zone.
Mode *bool // Optional: One of the predefined values in [enabled, disabled].
Passive *uint64 // Optional: millidegrees Celsius. (0 for disabled, > 1000 for enabled+value)
}
// ClassThermalZoneStats returns Thermal Zone metrics for all zones.
func (fs FS) ClassThermalZoneStats() ([]ClassThermalZoneStats, error) {
zones, err := filepath.Glob(fs.sys.Path("class/thermal/thermal_zone[0-9]*"))
if err != nil {
return nil, err
}
stats := make([]ClassThermalZoneStats, 0, len(zones))
for _, zone := range zones {
zoneStats, err := parseClassThermalZone(zone)
if err != nil {
if errors.Is(err, syscall.ENODATA) || errors.As(err, new(*fsp.PathError)) || errors.Is(err, syscall.EAGAIN) {
continue
}
return nil, err
}
zoneStats.Name = strings.TrimPrefix(filepath.Base(zone), "thermal_zone")
stats = append(stats, zoneStats)
}
return stats, nil
}
func parseClassThermalZone(zone string) (ClassThermalZoneStats, error) {
// Required attributes.
zoneType, err := util.SysReadFile(filepath.Join(zone, "type"))
if err != nil {
return ClassThermalZoneStats{}, err
}
zonePolicy, err := util.SysReadFile(filepath.Join(zone, "policy"))
if err != nil {
return ClassThermalZoneStats{}, err
}
zoneTemp, err := util.SysReadIntFromFile(filepath.Join(zone, "temp"))
if err != nil {
return ClassThermalZoneStats{}, err
}
// Optional attributes.
mode, err := util.SysReadFile(filepath.Join(zone, "mode"))
if err != nil && !os.IsNotExist(err) && !os.IsPermission(err) {
return ClassThermalZoneStats{}, err
}
zoneMode := util.ParseBool(mode)
var zonePassive *uint64
passive, err := util.SysReadUintFromFile(filepath.Join(zone, "passive"))
if os.IsNotExist(err) || os.IsPermission(err) {
zonePassive = nil
} else if err != nil {
return ClassThermalZoneStats{}, err
} else {
zonePassive = &passive
}
return ClassThermalZoneStats{
Type: zoneType,
Policy: zonePolicy,
Temp: zoneTemp,
Mode: zoneMode,
Passive: zonePassive,
}, nil
}
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