block_device

Documentation

Index

• Constants
• Variables
• func GetDeviceSize(deviceFile *os.File) (uint64, error)
• type BlockHeader
  • func (b *BlockHeader) Equal(b2 *BlockHeader) bool
  • func (b *BlockHeader) IsNil() bool
  • func (b *BlockHeader) Marshal(buf []byte)
  • func (b *BlockHeader) String() string
  • func (b *BlockHeader) Unmarshal(buf []byte)
• type BlockHeaders
  • func NewBlockHeaders() BlockHeaders
  • func (bs BlockHeaders) Add(b *BlockHeader) error
  • func (bs BlockHeaders) Delete(br torus.BlockRef)
  • func (bs BlockHeaders) IsUsed() bool
  • func (bs BlockHeaders) Marshal(buf []byte) error
  • func (bs BlockHeaders) String() string
  • func (bs BlockHeaders) Unmarshal(buf []byte) error
• type Metadata
  • func (m *Metadata) Marshal() []byte
  • func (m *Metadata) Unmarshal(buf []byte) error

Constants

const (
	BlockHeaderSize = 32 // 4 fields * 8 byte fields
)

Variables

var (
	BlockSize    uint64 = 4096 // number of bytes in a device block
	MetadataSize        = BlockSize

	MagicSentence = []byte("I am a torus block device!")
	MagicLen      = len(MagicSentence)
)

Functions

func GetDeviceSize

func GetDeviceSize(deviceFile *os.File) (uint64, error)

Types

type BlockHeader

type BlockHeader struct {
	Volume   uint64
	Inode    uint64
	Index    uint64
	Location uint64
}

func (*BlockHeader) Equal

func (b *BlockHeader) Equal(b2 *BlockHeader) bool

func (*BlockHeader) IsNil

func (b *BlockHeader) IsNil() bool

func (*BlockHeader) Marshal

func (b *BlockHeader) Marshal(buf []byte)

func (*BlockHeader) String

func (b *BlockHeader) String() string

func (*BlockHeader) Unmarshal

func (b *BlockHeader) Unmarshal(buf []byte)

type BlockHeaders

type BlockHeaders []*BlockHeader

func NewBlockHeaders

func NewBlockHeaders() BlockHeaders

func (BlockHeaders) Add

func (bs BlockHeaders) Add(b *BlockHeader) error

func (BlockHeaders) Delete

func (bs BlockHeaders) Delete(br torus.BlockRef)

func (BlockHeaders) IsUsed

func (bs BlockHeaders) IsUsed() bool

func (BlockHeaders) Marshal

func (bs BlockHeaders) Marshal(buf []byte) error

func (BlockHeaders) String

func (bs BlockHeaders) String() string

func (BlockHeaders) Unmarshal

func (bs BlockHeaders) Unmarshal(buf []byte) error

type Metadata

type Metadata struct {
	TorusBlockSize     uint64
	FormattedTimestamp time.Time
	UsedBlocks         uint64
}

func (*Metadata) Marshal

func (m *Metadata) Marshal() []byte

func (*Metadata) Unmarshal

func (m *Metadata) Unmarshal(buf []byte) error