superblock

Documentation

Index

• Constants
• func LimitWriter(w io.Writer, n int64) io.Writer
• type Checksum
  • func NewChecksum() *Checksum
  • func (cs *Checksum) Get() uint32
  • func (cs *Checksum) Write(b []byte) (n int, err error)
• type Superblock
  • func GetSuperBlock(devicePath string) (*Superblock, error)
  • func (sb *Superblock) CalculateNewChecksum() uint32
  • func (sb *Superblock) CalculateNewChecksumAndWriteIt(devicePath string) error

Constants

const BlockStart = 1024

Functions

func LimitWriter

func LimitWriter(w io.Writer, n int64) io.Writer

Types

type Checksum

type Checksum struct {
	// contains filtered or unexported fields
}

func NewChecksum

func NewChecksum() *Checksum

func (*Checksum) Get

func (cs *Checksum) Get() uint32

func (*Checksum) Write

func (cs *Checksum) Write(b []byte) (n int, err error)

type Superblock

type Superblock struct {
	InodeCount           uint32     `struc:"uint32,little"`
	BlockcountLo         uint32     `struc:"uint32,little"`
	RBlockcountLo        uint32     `struc:"uint32,little"`
	FreeBlockcountLo     uint32     `struc:"uint32,little"`
	FreeInodecount       uint32     `struc:"uint32,little"`
	FirstDataBlock       uint32     `struc:"uint32,little"`
	LogBlockSize         uint32     `struc:"uint32,little"`
	LogClusterSize       uint32     `struc:"uint32,little"`
	BlockperGroup        uint32     `struc:"uint32,little"`
	ClusterperGroup      uint32     `struc:"uint32,little"`
	InodeperGroup        uint32     `struc:"uint32,little"`
	Mtime                uint32     `struc:"uint32,little"`
	Wtime                uint32     `struc:"uint32,little"`
	MntCount             uint16     `struc:"uint16,little"`
	MaxMntCount          uint16     `struc:"uint16,little"`
	Magic                uint16     `struc:"uint16,little"`
	State                uint16     `struc:"uint16,little"`
	Errors               uint16     `struc:"uint16,little"`
	MinorRevLevel        uint16     `struc:"uint16,little"`
	Lastcheck            uint32     `struc:"uint32,little"`
	Checkinterval        uint32     `struc:"uint32,little"`
	CreatorOs            uint32     `struc:"uint32,little"`
	RevLevel             uint32     `struc:"uint32,little"`
	DefResuid            uint16     `struc:"uint16,little"`
	DefResgid            uint16     `struc:"uint16,little"`
	FirstIno             uint32     `struc:"uint32,little"`
	InodeSize            uint16     `struc:"uint16,little"`
	BlockGroupNr         uint16     `struc:"uint16,little"`
	FeatureCompat        uint32     `struc:"uint32,little"`
	FeatureIncompat      uint32     `struc:"uint32,little"`
	FeatureRoCompat      uint32     `struc:"uint32,little"`
	Uuid                 [16]byte   `struc:"[16]byte"`
	VolumeName           [16]byte   `struc:"[16]byte"`
	LastMounted          [64]byte   `struc:"[64]byte"`
	AlgorithmUsageBitmap uint32     `struc:"uint32,little"`
	PreallocBlocks       byte       `struc:"byte"`
	PreallocDirBlocks    byte       `struc:"byte"`
	ReservedGdtBlocks    uint16     `struc:"uint16,little"`
	JournalUuid          [16]byte   `struc:"[16]byte"`
	JournalInum          uint32     `struc:"uint32,little"`
	JournalDev           uint32     `struc:"uint32,little"`
	LastOrphan           uint32     `struc:"uint32,little"`
	HashSeed             [4]uint32  `struc:"[4]uint32,little"`
	DefHashVersion       byte       `struc:"byte"`
	JnlBackupType        byte       `struc:"byte"`
	DescSize             uint16     `struc:"uint16,little"`
	DefaultMountOpts     uint32     `struc:"uint32,little"`
	FirstMetaBg          uint32     `struc:"uint32,little"`
	MkfTime              uint32     `struc:"uint32,little"`
	JnlBlocks            [17]uint32 `struc:"[17]uint32,little"`
	BlockcountHi         uint32     `struc:"uint32,little"`
	RBlockcountHi        uint32     `struc:"uint32,little"`
	FreeBlockcountHi     uint32     `struc:"uint32,little"`
	MinExtraIsize        uint16     `struc:"uint16,little"`
	WantExtraIsize       uint16     `struc:"uint16,little"`
	Flags                uint32     `struc:"uint32,little"`
	RaidStride           uint16     `struc:"uint16,little"`
	MmpUpdateInterval    uint16     `struc:"uint16,little"`
	MmpBlock             uint64     `struc:"uint64,little"`
	RaidStripeWidth      uint32     `struc:"uint32,little"`
	LogGroupperFlex      byte       `struc:"byte"`
	ChecksumType         byte       `struc:"byte"`
	EncryptionLevel      byte       `struc:"byte"`
	ReservedPad          byte       `struc:"byte"`
	KbyteWritten         uint64     `struc:"uint64,little"`
	SnapshotInum         uint32     `struc:"uint32,little"`
	SnapshotId           uint32     `struc:"uint32,little"`
	SnapshotRBlockcount  uint64     `struc:"uint64,little"`
	SnapshotList         uint32     `struc:"uint32,little"`
	ErrorCount           uint32     `struc:"uint32,little"`
	FirstErrorTime       uint32     `struc:"uint32,little"`
	FirstErrorIno        uint32     `struc:"uint32,little"`
	FirstErrorBlock      uint64     `struc:"uint64,little"`
	FirstErrorFunc       [32]byte   `struc:"[32]pad"`
	FirstErrorLine       uint32     `struc:"uint32,little"`
	LastErrorTime        uint32     `struc:"uint32,little"`
	LastErrorIno         uint32     `struc:"uint32,little"`
	LastErrorLine        uint32     `struc:"uint32,little"`
	LastErrorBlock       uint64     `struc:"uint64,little"`
	LastErrorFunc        [32]byte   `struc:"[32]pad"`
	MountOpts            [64]byte   `struc:"[64]pad"`
	UsrQuotaInum         uint32     `struc:"uint32,little"`
	GrpQuotaInum         uint32     `struc:"uint32,little"`
	OverheadClusters     uint32     `struc:"uint32,little"`
	BackupBgs            [2]uint32  `struc:"[2]uint32,little"`
	EncryptAlgos         [4]byte    `struc:"[4]pad"`
	EncryptPwSalt        [16]byte   `struc:"[16]pad"`
	LpfIno               uint32     `struc:"uint32,little"`
	PrjQuotaInum         uint32     `struc:"uint32,little"`
	ChecksumSeed         uint32     `struc:"uint32,little"`
	Reserved             [98]uint32 `struc:"[98]uint32,little"`
	Checksum             uint32     `struc:"uint32,little"`
}

func GetSuperBlock

func GetSuperBlock(devicePath string) (*Superblock, error)

GetSuperBlock accepts a path to a device (file or device) and tries to get the SuperBlock from it

func (*Superblock) CalculateNewChecksum

func (sb *Superblock) CalculateNewChecksum() uint32

func (*Superblock) CalculateNewChecksumAndWriteIt

func (sb *Superblock) CalculateNewChecksumAndWriteIt(devicePath string) error