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fix(agent): discover fans on legacy hwmon parent devices (#2238)

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This commit is contained in:
Ilya Muratov
2026-08-18 18:32:52 +03:00
committed by GitHub
parent 96beadc8c9
commit 0eb3426619
2 changed files with 37 additions and 3 deletions
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22
agent/fans.go
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@@ -72,14 +72,30 @@ func discoverHwmonFans(root string) ([]fanSensor, error) {
var sensors []fanSensor
for _, entry := range entries {
chipDir := filepath.Join(root, entry.Name())
chipName := utils.ReadStringFile(filepath.Join(chipDir, "name"))
sensorDir := chipDir
inputs, _ := filepath.Glob(filepath.Join(sensorDir, "fan*_input"))
// Some legacy hwmon drivers (notably applesmc) register a hwmon class
// device but create fan attributes on the parent platform device. In
// sysfs that parent is exposed through hwmonN/device.
if len(inputs) == 0 {
deviceDir := filepath.Join(chipDir, "device")
if deviceInputs, _ := filepath.Glob(filepath.Join(deviceDir, "fan*_input")); len(deviceInputs) > 0 {
sensorDir = deviceDir
inputs = deviceInputs
}
}
chipName := utils.ReadStringFile(filepath.Join(sensorDir, "name"))
if chipName == "" {
chipName = utils.ReadStringFile(filepath.Join(chipDir, "name"))
}
if chipName == "" {
chipName = entry.Name()
}
inputs, _ := filepath.Glob(filepath.Join(chipDir, "fan*_input"))
for _, inputPath := range inputs {
base := strings.TrimSuffix(filepath.Base(inputPath), "_input")
label := utils.ReadStringFile(filepath.Join(chipDir, base+"_label"))
label := utils.ReadStringFile(filepath.Join(sensorDir, base+"_label"))
key := chipName + "_" + base
if label != "" {
key = chipName + "_" + label