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// SPDX-License-Identifier: GPL-3.0-or-later
package smartctl
import (
"fmt"
"maps"
"slices"
"strconv"
"strings"
"time"
"github.com/tidwall/gjson"
)
func (s *Smartctl) collect() (map[string]int64, error) {
now := time.Now()
if s.forceScan || s.isTimeToScan(now) {
devices, err := s.scanDevices()
if err != nil {
return nil, err
}
for k, dev := range s.scannedDevices {
if _, ok := devices[k]; !ok {
delete(s.scannedDevices, k)
delete(s.seenDevices, k)
s.removeDeviceCharts(dev)
}
}
s.forceDevicePoll = !maps.Equal(s.scannedDevices, devices)
s.scannedDevices = devices
s.lastScanTime = now
s.forceScan = false
}
if s.forceDevicePoll || s.isTimeToPollDevices(now) {
mx := make(map[string]int64)
// TODO: make it concurrent
for _, d := range s.scannedDevices {
if err := s.collectScannedDevice(mx, d); err != nil {
return nil, err
}
}
s.forceDevicePoll = false
s.lastDevicePollTime = now
s.mx = mx
}
return s.mx, nil
}
func (s *Smartctl) collectScannedDevice(mx map[string]int64, scanDev *scanDevice) error {
resp, err := s.exec.deviceInfo(scanDev.name, scanDev.typ, s.NoCheckPowerMode)
if err != nil {
if resp != nil && isDeviceOpenFailedNoSuchDevice(resp) {
s.Infof("smartctl reported that device '%s' type '%s' no longer exists", scanDev.name, scanDev.typ)
s.forceScan = true
return nil
}
return fmt.Errorf("failed to get device info for '%s' type '%s': %v", scanDev.name, scanDev.typ, err)
}
if isDeviceInLowerPowerMode(resp) {
s.Debugf("device '%s' type '%s' is in a low-power mode, skipping", scanDev.name, scanDev.typ)
return nil
}
dev := newSmartDevice(resp)
if !isSmartDeviceValid(dev) {
return nil
}
if !s.seenDevices[scanDev.key()] {
s.seenDevices[scanDev.key()] = true
s.addDeviceCharts(dev)
}
s.collectSmartDevice(mx, dev)
return nil
}
func (s *Smartctl) collectSmartDevice(mx map[string]int64, dev *smartDevice) {
px := fmt.Sprintf("device_%s_type_%s_", dev.deviceName(), dev.deviceType())
if v, ok := dev.powerOnTime(); ok {
mx[px+"power_on_time"] = v
}
if v, ok := dev.temperature(); ok {
mx[px+"temperature"] = v
}
if v, ok := dev.powerCycleCount(); ok {
mx[px+"power_cycle_count"] = v
}
if v, ok := dev.smartStatusPassed(); ok {
mx[px+"smart_status_passed"] = 0
mx[px+"smart_status_failed"] = 0
if v {
mx[px+"smart_status_passed"] = 1
} else {
mx[px+"smart_status_failed"] = 1
}
}
if v, ok := dev.ataSmartErrorLogCount(); ok {
mx[px+"ata_smart_error_log_summary_count"] = v
}
if attrs, ok := dev.ataSmartAttributeTable(); ok {
for _, attr := range attrs {
if !isSmartAttrValid(attr) {
continue
}
n := strings.ToLower(attr.name())
n = strings.ReplaceAll(n, " ", "_")
px := fmt.Sprintf("%sattr_%s_", px, n)
if v, err := strconv.ParseInt(attr.value(), 10, 64); err == nil {
mx[px+"normalized"] = v
}
if v, err := strconv.ParseInt(attr.rawValue(), 10, 64); err == nil {
mx[px+"raw"] = v
}
rs := strings.TrimSpace(attr.rawString())
if i := strings.IndexByte(rs, ' '); i != -1 {
rs = rs[:i]
}
if v, err := strconv.ParseInt(rs, 10, 64); err == nil {
mx[px+"decoded"] = v
}
}
}
}
func (s *Smartctl) isTimeToScan(now time.Time) bool {
return now.After(s.lastScanTime.Add(s.ScanEvery.Duration()))
}
func (s *Smartctl) isTimeToPollDevices(now time.Time) bool {
return now.After(s.lastDevicePollTime.Add(s.PollDevicesEvery.Duration()))
}
func isSmartDeviceValid(d *smartDevice) bool {
return d.deviceName() != "" && d.deviceType() != ""
}
func isSmartAttrValid(a *smartAttribute) bool {
return a.id() != "" && a.name() != ""
}
func isDeviceInLowerPowerMode(r *gjson.Result) bool {
if !isExitStatusHasBit(r, 1) {
return false
}
messages := r.Get("smartctl.messages").Array()
return slices.ContainsFunc(messages, func(msg gjson.Result) bool {
text := msg.Get("string").String()
return strings.HasPrefix(text, "Device is in") && strings.Contains(text, "mode")
})
}
func isDeviceOpenFailedNoSuchDevice(r *gjson.Result) bool {
if !isExitStatusHasBit(r, 1) {
return false
}
messages := r.Get("smartctl.messages").Array()
return slices.ContainsFunc(messages, func(msg gjson.Result) bool {
text := msg.Get("string").String()
return strings.HasSuffix(text, "No such device")
})
}
func isExitStatusHasBit(r *gjson.Result, bit int) bool {
// https://manpages.debian.org/bullseye/smartmontools/smartctl.8.en.html#EXIT_STATUS
status := int(r.Get("smartctl.exit_status").Int())
mask := 1 << bit
return (status & mask) != 0
}
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