storage

type DataWriter interface {
	WriteFiles(meta metadata.Metadata, files map[string][]byte) error
}

type Filesystem struct {

	// FixedFSGroup is an optional field which will set the gid ownership of all
	// volume's data directories to this value.
	// If this value is set, FSGroupVolumeAttributeKey has no effect.
	FixedFSGroup *int64

	// FSGroupVolumeAttributeKey is an optional well-known key in the volume
	// attributes. If this attribute is present in the context when writing
	// files, gid ownership of the volume's data directory will be changed to
	// the value. Attribute value must be a valid int64 value.
	// If FixedFSGroup is defined, this field has no effect.
	FSGroupVolumeAttributeKey string
	// contains filtered or unexported fields
}

type Interface interface {
	// PathForVolume returns the data path for the given volume.
	PathForVolume(volumeID string) string

	// RemoveVolume removes all metadata and data for a volume.
	// This is a destructive, irreversible operation.
	RemoveVolume(volumeID string) error

	MetadataReader
	MetadataWriter
	DataWriter
}

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

type MetadataReader interface {
	// ReadMetadata will read the metadata for a single volumeID.
	ReadMetadata(volumeID string) (metadata.Metadata, error)

	// ListVolumes will return a list of all volumeIDs in the storage backend.
	// Used when the driver restarts to resume processing of existing data.
	ListVolumes() ([]string, error)
}

type MetadataWriter interface {
	// WriteMetadata will write the metadata file for the given volume.
	// If the directory for this volume does not exist, it will return an error.
	WriteMetadata(volumeID string, meta metadata.Metadata) error

	// RegisterMetadata will create a directory for the given metadata and, if
	// the metadata file does not already exist or volume context has changed,
	// persist the given metadata file.
	// It will return true if the metadata file has been written, false
	// otherwise.
	RegisterMetadata(meta metadata.Metadata) (bool, error)
}