},
	{
		// LZ4
		header: []byte{0x4, 0x22, 0x4d, 0x18},
		f:      formatLZ4,
	},
	{
		// Snappy/S2 stream
		header: []byte{0xff, 0x06, 0x00, 0x00},
		f:      formatS2,
	},
	{
		header: []byte{0x42, 0x5a, 'h'},
		f:      formatBZ2,
	},
}

type untarOptions struct {
	ignoreDirs bool
	ignoreErrs bool
	prefixAll  string
}

// md5sum
type SealMD5CurrFn func([]byte) []byte

// PutObjReader is a type that wraps sio.EncryptReader and
// underlying hash.Reader in a struct
type PutObjReader struct {
	*hash.Reader              // actual data stream
	rawReader    *hash.Reader // original data stream
	sealMD5Fn    SealMD5CurrFn
}

// Size returns the absolute number of bytes the Reader

	xioutil "github.com/minio/minio/internal/ioutil"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/minio/internal/mcontext"
)

type apiConfig struct {
	mu sync.RWMutex

	requestsPool           chan struct{}
	clusterDeadline        time.Duration
	listQuorum             string
	corsAllowOrigins       []string
	replicationPriority    string
	replicationMaxWorkers  int

			// from a single drive, shuffling of the drives is subsequently.
			disks = newDisks
			askDisks = 1
		} else {
			// If we did not find suitable disks, perform strict quorum listing
			// as no disk agrees on quorum anymore.
			askDisks = getListQuorum("strict", er.setDriveCount)
		}
	}

	var fallbackDisks []StorageAPI

	// Special case: ask all disks if the drive count is 4

		}
		if strings.Contains(stream.Name, "..") || !utf8.ValidString(stream.Name) {
			return fmt.Errorf("invalid stream name: %q", stream.Name)
		}

		dst := filepath.Join(extractDir, stream.Name)
		os.Mkdir(extractDir, 0o755)
		w, err := os.Create(dst)
		if err != nil {
			return fmt.Errorf("creating output file: %w", err)
		}
		_, err = io.Copy(w, stream)
		if err != nil {

					// We are either strict, or don't have enough information to match.
					// Switch to a pure counting algo.
					x := make(map[xlMetaV2VersionHeader]int, len(tops))
					for _, a := range tops {
						if a.header.VersionID != ver.header.VersionID {
							continue
						}
						if !strict {
							// we must match EC, when we are not strict.
							if !a.header.matchesEC(ver.header) {

			r:            metadataResolutionParams{dirQuorum: 4, objQuorum: 4, strict: false},
			wantSelected: &inputSerialized[0],
			wantOk:       true,
		},
		{
			name:         "consistent-strict",
			m:            metaCacheEntries{inputSerialized[0], inputSerialized[0], inputSerialized[0], inputSerialized[0]},
			r:            metadataResolutionParams{dirQuorum: 4, objQuorum: 4, strict: false},
			wantSelected: &inputSerialized[0],

	xhttp "github.com/minio/minio/internal/http"
	"github.com/minio/minio/internal/ioutil"
	"github.com/minio/minio/internal/ringbuffer"
)

// Calculates bitrot in chunks and writes the hash into the stream.
type streamingBitrotWriter struct {
	iow          io.WriteCloser
	closeWithErr func(err error)
	h            hash.Hash
	shardSize    int64
	canClose     *sync.WaitGroup
	byteBuf      []byte
	finished     bool
}

type CheckPartsResp struct {
	Results []int `msg:"r"`
}

// LocalDiskIDs - GetLocalIDs response.
type LocalDiskIDs struct {
	IDs []string `msg:"i"`
}

// ListDirResult - ListDir()'s response.
type ListDirResult struct {
	Entries []string `msg:"e"`
}

// ReadPartsReq - send multiple part paths to read from
type ReadPartsReq struct {
	Paths []string `msg:"p"`
}

`xl.meta` carries first 8 bytes an XL header which describes the current format and the format version,
allowing the unmarshaller's to automatically use the right data structures to parse the subsequent content in the stream.

### v1.0

| Entry     | Encoding    | Content
| ----------|-------------|----------------------------------------
| xlHeader  | [4]byte     | `'X', 'L', '2', ' '`
| xlVersion | [4]byte     | `'1', ' ', ' ', ' '`