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// Copyright 2019 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 (
"path/filepath"
"strconv"
"strings"
"github.com/prometheus/procfs/internal/util"
)
// ClassCoolingDeviceStats contains info from files in /sys/class/thermal/cooling_device[0-9]*
// for a single device.
// https://www.kernel.org/doc/Documentation/thermal/sysfs-api.txt
type ClassCoolingDeviceStats struct {
Name string // The name of the cooling device.
Type string // Type of the cooling device(processor/fan/...)
MaxState int64 // Maximum cooling state of the cooling device
CurState int64 // Current cooling state of the cooling device
}
func (fs FS) ClassCoolingDeviceStats() ([]ClassCoolingDeviceStats, error) {
cds, err := filepath.Glob(fs.sys.Path("class/thermal/cooling_device[0-9]*"))
if err != nil {
return []ClassCoolingDeviceStats{}, err
}
var coolingDeviceStats = ClassCoolingDeviceStats{}
stats := make([]ClassCoolingDeviceStats, len(cds))
for i, cd := range cds {
cdName := strings.TrimPrefix(filepath.Base(cd), "cooling_device")
coolingDeviceStats, err = parseCoolingDeviceStats(cd)
if err != nil {
return []ClassCoolingDeviceStats{}, err
}
coolingDeviceStats.Name = cdName
stats[i] = coolingDeviceStats
}
return stats, nil
}
func parseCoolingDeviceStats(cd string) (ClassCoolingDeviceStats, error) {
cdType, err := util.SysReadFile(filepath.Join(cd, "type"))
if err != nil {
return ClassCoolingDeviceStats{}, err
}
cdMaxStateString, err := util.SysReadFile(filepath.Join(cd, "max_state"))
if err != nil {
return ClassCoolingDeviceStats{}, err
}
cdMaxStateInt, err := strconv.ParseInt(cdMaxStateString, 10, 64)
if err != nil {
return ClassCoolingDeviceStats{}, err
}
// cur_state can be -1, eg intel powerclamp
// https://www.kernel.org/doc/Documentation/thermal/intel_powerclamp.txt
cdCurStateString, err := util.SysReadFile(filepath.Join(cd, "cur_state"))
if err != nil {
return ClassCoolingDeviceStats{}, err
}
cdCurStateInt, err := strconv.ParseInt(cdCurStateString, 10, 64)
if err != nil {
return ClassCoolingDeviceStats{}, err
}
return ClassCoolingDeviceStats{
Type: cdType,
MaxState: cdMaxStateInt,
CurState: cdCurStateInt,
}, nil
}
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