backend

Documentation

Index

• Variables
• type File
• type Storage
  • func Sub(u Storage, offset, size int64) Storage
• type SubStorage
  • func (s SubStorage) Close() error
  • func (s SubStorage) Path() string
  • func (s SubStorage) Read(bytes []byte) (int, error)
  • func (s SubStorage) ReadAt(p []byte, off int64) (n int, err error)
  • func (s SubStorage) Seek(offset int64, whence int) (int64, error)
  • func (s SubStorage) Stat() (fs.FileInfo, error)
  • func (s SubStorage) Sys() (*os.File, error)
  • func (s SubStorage) Writable() (WritableFile, error)
• type WritableFile

Variables

var (
	ErrIncorrectOpenMode = errors.New("disk file or device not open for write")
	ErrNotSuitable       = errors.New("backing file is not suitable")
)

Types

type File

type File interface {
	fs.File
	io.ReaderAt
	io.Seeker
	io.Closer
}

type Storage

type Storage interface {
	File
	// OS-specific file for ioctl calls via fd
	Sys() (*os.File, error)
	// file for read-write operations
	Writable() (WritableFile, error)
	// Path returns the path to the underlying storage, if any; returns empty string if not applicable
	Path() string
}

func Sub

func Sub(u Storage, offset, size int64) Storage

type SubStorage

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

func (SubStorage) Close

func (s SubStorage) Close() error

func (SubStorage) Path

func (s SubStorage) Path() string

func (SubStorage) Read

func (s SubStorage) Read(bytes []byte) (int, error)

func (SubStorage) ReadAt

func (s SubStorage) ReadAt(p []byte, off int64) (n int, err error)

func (SubStorage) Seek

func (s SubStorage) Seek(offset int64, whence int) (int64, error)

func (SubStorage) Stat

func (s SubStorage) Stat() (fs.FileInfo, error)

func (SubStorage) Sys

func (s SubStorage) Sys() (*os.File, error)

func (SubStorage) Writable

func (s SubStorage) Writable() (WritableFile, error)

type WritableFile

type WritableFile interface {
	File
	io.WriterAt
}