types

package
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 Go to latest Published: Aug 10, 2026 License: GPL-3.0 Imports: 2 Imported by: 0

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Index

Constants

View Source 
const (
	SmartAttrSSDLifeUsed       = 173
	SmartAttrWearLevelingCount = 177
	SmartAttrSSDLifeLeft       = 231
	SmartAttrSandForceInternal = 233
	SmartAttrTotalLBAsWritten  = 234
)

SMART attribute IDs for SSD detection and wear-level computation.

Variables

View Source 
var ValidSelfTestTypes = []string{"short", "long", "conveyance", "offline"}

ValidSelfTestTypes lists the supported self-test type names.

Functions

func PopulateSelfTestInfo 

func PopulateSelfTestInfo(info *SelfTestInfo, ata *AtaSmartData, nvmeCaps *NvmeControllerCapabilities, nvmeOptional *NvmeOptionalAdminCommands)

PopulateSelfTestInfo fills a SelfTestInfo with available test types and durations from either ATA SMART data or NVMe capabilities.

Types

type AtaSmartData 

type AtaSmartData struct {
	OfflineDataCollection *OfflineDataCollection `json:"offline_data_collection,omitempty"`
	SelfTest              *SelfTest              `json:"self_test,omitempty"`
	Capabilities          *Capabilities          `json:"capabilities,omitempty"`
	Table                 []SmartAttribute       `json:"table,omitempty"`
}

AtaSmartData represents ATA SMART attributes

type Backend 

type Backend interface {
	Name() string
	ScanDevices(ctx context.Context) ([]Device, error)
	GetSMARTInfo(ctx context.Context, devicePath string) (*SMARTInfo, error)
	CheckHealth(ctx context.Context, devicePath string) (bool, error)
	GetDeviceInfo(ctx context.Context, devicePath string) (map[string]any, error)
	RunSelfTest(ctx context.Context, devicePath string, testType string) error
	GetAvailableSelfTests(ctx context.Context, devicePath string) (*SelfTestInfo, error)
	EnableSMART(ctx context.Context, devicePath string) error
	DisableSMART(ctx context.Context, devicePath string) error
	AbortSelfTest(ctx context.Context, devicePath string) error
	Close() error
}

Backend is the pluggable execution interface for SMART operations.

type Capabilities 

type Capabilities struct {
	Values                      []int `json:"values,omitempty"`
	ExecOfflineImmediate        bool  `json:"exec_offline_immediate_supported,omitempty"`
	SelfTestsSupported          bool  `json:"self_tests_supported,omitempty"`
	ConveyanceSelfTestSupported bool  `json:"conveyance_self_test_supported,omitempty"`
}

Capabilities represents SMART capabilities

type CapabilitiesOutput 

type CapabilitiesOutput struct {
	AtaSmartData               *AtaSmartData               `json:"ata_smart_data,omitempty"`
	NvmeControllerCapabilities *NvmeControllerCapabilities `json:"nvme_controller_capabilities,omitempty"`
	NvmeOptionalAdminCommands  *NvmeOptionalAdminCommands  `json:"nvme_optional_admin_commands,omitempty"`
}

CapabilitiesOutput represents the output of smartctl -c -j

type Cmd 

type Cmd interface {
	Output() ([]byte, error)
	Run() error
	CombinedOutput() ([]byte, error)
}

Cmd is the interface for a running command.

type Commander 

type Commander interface {
	Command(ctx context.Context, logger LogAdapter, name string, arg ...string) Cmd
}

Commander is the interface for executing OS commands.

type Device 

type Device struct {
	Name string
	Type string
}

Device represents a storage device

type DiscoveryBackend 

type DiscoveryBackend interface {
	Backend
	DiscoverDevices(ctx context.Context) ([]DiscoveryResult, error)
}

DiscoveryBackend is an optional extension of Backend that provides richer device discovery with per-device protocol-fallback details.

type DiscoveryResult 

type DiscoveryResult struct {
	// DevicePath is the path of the storage device (e.g., "/dev/sda").
	DevicePath string `json:"device_path"`

	// DetectedProtocol is the device type string used for the successful read
	// (e.g., "ata", "sat", "nvme"). Empty if the device was not readable.
	DetectedProtocol string `json:"detected_protocol,omitempty"`

	// SMARTReadable is true when at least one SMART read attempt (native
	// protocol or SAT fallback) produced a valid response.
	SMARTReadable bool `json:"smart_readable"`

	// SATFallbackRequired is true when the auto-detected protocol failed but
	// a retry with the explicit -d sat flag succeeded.
	SATFallbackRequired bool `json:"sat_fallback_required,omitempty"`

	// Model is the drive model name or model family string from the SMART data.
	Model string `json:"model,omitempty"`

	// Serial is the drive serial number from the SMART data.
	Serial string `json:"serial,omitempty"`
}

DiscoveryResult holds the outcome of probing a single device during DiscoverDevices. It reports whether SMART data was readable with the auto-detected protocol and whether a SAT fallback was required.

type ExitCodeInfo 

type ExitCodeInfo struct {
	// ExecBits holds bits 0–2 (mask 0x07) of the smartctl exit status.
	// Non-zero values indicate execution failures such as a missing binary,
	// permission denied, or a device that could not be opened.
	ExecBits int `json:"exec_bits"`

	// HealthBits holds bits 3–7 (mask 0xF8) of the smartctl exit status.
	// Non-zero values indicate drive health events. Each bit maps directly to
	// the corresponding bit in the exit status (bit 3 → 0x08, bit 4 → 0x10,
	// etc.), preserving the original semantics described in the smartctl man page.
	HealthBits int `json:"health_bits"`
}

ExitCodeInfo breaks down the smartctl exit status into semantic groups.

Bit assignments (from the smartctl man page, and the JSON exit_status field): 

ExecBits (mask 0x07, bits 0–2):
  0x01  command line did not parse
  0x02  device open failed
  0x04  SMART or ATA command to the disk failed

HealthBits (mask 0xF8, bits 3–7):
  0x08  SMART status check returned "DISK FAILING"
  0x10  pre-failure attributes found at or below threshold
  0x20  attributes were at or below threshold in the past
  0x40  device error log contains records of errors
  0x80  self-test log contains records of errors

type Flags 

type Flags struct {
	Value         int    `json:"value"`
	String        string `json:"string"`
	PreFailure    bool   `json:"prefailure"`
	UpdatedOnline bool   `json:"updated_online"`
	Performance   bool   `json:"performance"`
	ErrorRate     bool   `json:"error_rate"`
	EventCount    bool   `json:"event_count"`
	AutoKeep      bool   `json:"auto_keep"`
}

Flags represents attribute flags

type LogAdapter 

type LogAdapter interface {
	Debug(msg string, args ...any)
	DebugContext(ctx context.Context, msg string, args ...any)
	InfoContext(ctx context.Context, msg string, args ...any)
	WarnContext(ctx context.Context, msg string, args ...any)
	ErrorContext(ctx context.Context, msg string, args ...any)
}

LogAdapter captures the logging methods used by this package. It is satisfied by both *slog.Logger and *tlog.Logger.

type Message 

type Message struct {
	String   string `json:"string"`
	Severity string `json:"severity,omitempty"`
}

Message represents a message from smartctl

type NvmeControllerCapabilities 

type NvmeControllerCapabilities struct {
	SelfTest bool `json:"self_test,omitempty"`
}

NvmeControllerCapabilities represents NVMe controller capabilities

type NvmeOptionalAdminCommands 

type NvmeOptionalAdminCommands struct {
	SelfTest bool `json:"self_test,omitempty"`
}

NvmeOptionalAdminCommands represents NVMe optional admin commands

type NvmeSmartHealth 

type NvmeSmartHealth struct {
	CriticalWarning      int   `json:"critical_warning,omitempty"`
	Temperature          int   `json:"temperature,omitempty"`
	AvailableSpare       int   `json:"available_spare,omitempty"`
	AvailableSpareThresh int   `json:"available_spare_threshold,omitempty"`
	PercentageUsed       int   `json:"percentage_used,omitempty"`
	DataUnitsRead        int64 `json:"data_units_read,omitempty"`
	DataUnitsWritten     int64 `json:"data_units_written,omitempty"`
	HostReadCommands     int64 `json:"host_read_commands,omitempty"`
	HostWriteCommands    int64 `json:"host_write_commands,omitempty"`
	ControllerBusyTime   int64 `json:"controller_busy_time,omitempty"`
	PowerCycles          int64 `json:"power_cycles,omitempty"`
	PowerOnHours         int64 `json:"power_on_hours,omitempty"`
	UnsafeShutdowns      int64 `json:"unsafe_shutdowns,omitempty"`
	MediaErrors          int64 `json:"media_errors,omitempty"`
	NumErrLogEntries     int64 `json:"num_err_log_entries,omitempty"`
	WarningTempTime      int   `json:"warning_temp_time,omitempty"`
	CriticalCompTime     int   `json:"critical_comp_time,omitempty"`
	TemperatureSensors   []int `json:"temperature_sensors,omitempty"`
}

NvmeSmartHealth represents NVMe SMART health information

type NvmeSmartTestLog 

type NvmeSmartTestLog struct {
	CurrentOpeation   *int `json:"current_operation,omitempty"`
	CurrentCompletion *int `json:"current_completion,omitempty"`
}

type OfflineDataCollection 

type OfflineDataCollection struct {
	Status            *StatusField `json:"status,omitempty"`
	CompletionSeconds int          `json:"completion_seconds,omitempty"`
}

OfflineDataCollection represents offline data collection status

type PollingMinutes 

type PollingMinutes struct {
	Short      int `json:"short,omitempty"`
	Extended   int `json:"extended,omitempty"`
	Conveyance int `json:"conveyance,omitempty"`
}

PollingMinutes represents polling minutes for different test types

type PowerOnTime 

type PowerOnTime struct {
	Hours int `json:"hours"`
}

PowerOnTime represents power on time

type ProgressCallback 

type ProgressCallback func(progress int, status string)

ProgressCallback is a function type for reporting progress

type Raw 

type Raw struct {
	Value  int64  `json:"value"`
	String string `json:"string"`
}

Raw represents raw attribute value

type SMARTInfo 

type SMARTInfo struct {
	Device                     Device                      `json:"device"`
	ModelFamily                string                      `json:"model_family,omitempty"`
	ModelName                  string                      `json:"model_name,omitempty"`
	SerialNumber               string                      `json:"serial_number,omitempty"`
	Firmware                   string                      `json:"firmware_version,omitempty"`
	UserCapacity               *UserCapacity               `json:"user_capacity,omitempty"`
	RotationRate               *int                        `json:"rotation_rate,omitempty"` // Rotation rate in RPM (0 for SSDs, >0 for HDDs, nil if not available or not applicable)
	DiskType                   string                      `json:"-"`                       // Computed disk type: "SSD", "HDD", "NVMe", or "Unknown"
	InStandby                  bool                        `json:"in_standby,omitempty"`    // True if device is in standby/sleep mode (ATA only)
	ExitCodeInfo               *ExitCodeInfo               `json:"-"`                       // Computed from Smartctl.ExitStatus; nil when exit status is zero
	SmartStatus                *SmartStatus                `json:"smart_status,omitempty"`
	SmartSupport               *SmartSupport               `json:"smart_support,omitempty"`
	AtaSmartData               *AtaSmartData               `json:"ata_smart_data,omitempty"`
	NvmeSmartHealth            *NvmeSmartHealth            `json:"nvme_smart_health_information_log,omitempty"`
	NvmeSmartTestLog           *NvmeSmartTestLog           `json:"nvme_smart_test_log,omitempty"`
	NvmeControllerCapabilities *NvmeControllerCapabilities `json:"nvme_controller_capabilities,omitempty"`
	Temperature                *Temperature                `json:"temperature,omitempty"`
	PowerOnTime                *PowerOnTime                `json:"power_on_time,omitempty"`
	PowerCycleCount            int                         `json:"power_cycle_count,omitempty"`
	Smartctl                   *SmartctlInfo               `json:"smartctl,omitempty"` // Exec-backend metadata (smartctl version, exit_status, messages)
}

SMARTInfo represents comprehensive SMART information for a storage device

func (*SMARTInfo) WearLevelPercent 

func (s *SMARTInfo) WearLevelPercent() *int

WearLevelPercent returns the percentage of drive life used (0 = new, 100 = worn out), or nil when the value cannot be determined (HDDs, unknown types, or missing data).

The source depends on the drive type (SMARTInfo.DiskType):

  • NVMe: nvme_smart_health_information_log.percentage_used
  • SSD: ATA SMART attributes, tried in priority order: 1. Attribute 231 (SSD Life Left) — used = 100 − normalized value 2. Attribute 177 (Wear Leveling Count) — used = 100 − normalized value 3. Attribute 173 (SSD Life Used) — used = raw value
  • HDD / Unknown: nil

The returned value is always clamped to [0, 100].

type SelfTest 

type SelfTest struct {
	Status         *StatusField    `json:"status,omitempty"`
	PollingMinutes *PollingMinutes `json:"polling_minutes,omitempty"`
}

SelfTest represents self-test information

type SelfTestInfo 

type SelfTestInfo struct {
	Available []string       `json:"available"`
	Durations map[string]int `json:"durations"`
}

SelfTestInfo represents available self-tests and their durations

type SmartAttribute 

type SmartAttribute struct {
	ID         int    `json:"id"`
	Name       string `json:"name"`
	Value      int    `json:"value"`
	Worst      int    `json:"worst"`
	Thresh     int    `json:"thresh"`
	WhenFailed string `json:"when_failed,omitempty"`
	Flags      Flags  `json:"flags"`
	Raw        Raw    `json:"raw"`
}

SmartAttribute represents a single SMART attribute

type SmartStatus 

type SmartStatus struct {
	Running  bool `json:"running"`
	Passed   bool `json:"passed"`
	Damaged  bool `json:"damaged,omitempty"`
	Critical bool `json:"critical,omitempty"`
}

SmartStatus represents the overall SMART health status

type SmartSupport 

type SmartSupport struct {
	Available bool `json:"available"`
	Enabled   bool `json:"enabled"`
}

SmartSupport represents SMART availability and enablement status.

type SmartctlInfo 

type SmartctlInfo struct {
	Version    []int     `json:"version,omitempty"`
	Messages   []Message `json:"messages,omitempty"`
	ExitStatus int       `json:"exit_status,omitempty"`
}

SmartctlInfo represents smartctl metadata and messages

type StatusField 

type StatusField struct {
	Value            int    `json:"value"`
	String           string `json:"string"`
	Passed           *bool  `json:"passed,omitempty"`
	RemainingPercent *int   `json:"remaining_percent,omitempty"`
}

StatusField represents a status field that can be either a simple string or a complex object

func (*StatusField) UnmarshalJSON 

func (s *StatusField) UnmarshalJSON(data []byte) error

UnmarshalJSON allows StatusField to be parsed from either a JSON string (e.g., "completed") or a structured object with fields {value, string, passed, remaining_percent}.

type Temperature 

type Temperature struct {
	Current int `json:"current"`
}

Temperature represents device temperature

type UserCapacity 

type UserCapacity struct {
	Blocks int64 `json:"blocks"`
	Bytes  int64 `json:"bytes"`
}

UserCapacity represents storage device capacity information

Source Files

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