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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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18
agent/fans_test.go
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@@ -50,6 +50,24 @@ func TestReadHwmonFans(t *testing.T) {
}, fans)
}
// TestReadHwmonFansLegacyParent verifies legacy hwmon layouts such as applesmc,
// where the hwmon class node exists but fan attributes live on hwmonN/device.
func TestReadHwmonFansLegacyParent(t *testing.T) {
root := t.TempDir()
deviceDir := filepath.Join(root, "devices", "applesmc.768")
writeFile(t, filepath.Join(deviceDir, "name"), "applesmc\n")
writeFile(t, filepath.Join(deviceDir, "fan1_input"), "1202\n")
writeFile(t, filepath.Join(deviceDir, "fan1_label"), "Exhaust\n")
chipDir := filepath.Join(root, "hwmon1")
require.NoError(t, os.MkdirAll(chipDir, 0o755))
require.NoError(t, os.Symlink(deviceDir, filepath.Join(chipDir, "device")))
fans, err := readHwmonFans(root)
require.NoError(t, err)
assert.Equal(t, map[string]uint16{"applesmc_Exhaust": 1202}, fans)
}
// TestReadHwmonFansMissingRoot returns an error rather than panicking when the
// hwmon root doesn't exist (e.g. running on a kernel without hwmon support).
func TestReadHwmonFansMissingRoot(t *testing.T) {