func (r *Reader) AddChecksum(req *http.Request, ignoreValue bool) error {
	cs, err := GetContentChecksum(req.Header)
	if err != nil {
		return ErrInvalidChecksum
	}
	if cs == nil {
		return nil
	}
	r.contentHash = *cs
	if cs.Type.Trailing() {
		r.trailer = req.Trailer
	}
	return r.AddNonTrailingChecksum(cs, ignoreValue)
}

// AddChecksumNoTrailer will add checksum checks as specified in

func (cs *SubsysInfo) WriteTo(b *strings.Builder, off bool) {
	cs.AddEnvString(b)
	if off {
		b.WriteString(KvComment)
		b.WriteString(KvSpaceSeparator)
	}
	b.WriteString(cs.SubSys)
	if cs.Target != Default {
		b.WriteString(SubSystemSeparator)
		b.WriteString(cs.Target)
	}
	b.WriteString(KvSpaceSeparator)
	for _, kv := range cs.Config {

	onlineDisks := er.getDisks()
	writeQuorum := fi.WriteQuorum(er.defaultWQuorum())

	if cs := fi.Metadata[hash.MinIOMultipartChecksum]; cs != "" {
		if r.ContentCRCType().String() != cs {
			return pi, InvalidArgument{
				Bucket: bucket,
				Object: fi.Name,
				Err:    fmt.Errorf("checksum missing, want %q, got %q", cs, r.ContentCRCType().String()),
			}
		}
	}

Harshavardhana <******@****.***> <******@****.***>
Harshavardhana <******@****.***> <******@****.***>
Harshavardhana <******@****.***>
Krishna Srinivas <******@****.***> <******@****.***>
Matthew Farrellee <matt@cs.wisc.edu>

		prevDriveIOStatsMu.Lock()
		if prevDriveIOStats != nil {
			duration := now.Sub(prevDriveIOStatsRefreshedAt)
			if duration.Seconds() > 1 {
				for d, cs := range currentStats {
					if ps, found := prevDriveIOStats[d]; found {
						v.ioStats[d] = getDriveIOStatMetrics(getDiffStats(ps, cs), duration)
					}
				}
			}
		}

		prevDriveIOStats = currentStats
		prevDriveIOStatsRefreshedAt = now
		prevDriveIOStatsMu.Unlock()

		length := typ.RawByteLen()
		if length == 0 || len(b) < length {
			break
		}
		cs := base64.StdEncoding.EncodeToString(b[:length])
		b = b[length:]
		if typ.Is(ChecksumMultipart) {
			t, n := binary.Uvarint(b)
			if n < 0 {
				break
			}
			cs = fmt.Sprintf("%s-%d", cs, t)
			b = b[n:]
			if part > 0 {
				cs = ""
			}
			if typ.Is(ChecksumIncludesMultipart) {
				wantLen := int(t) * length

				err = msgp.WrapError(err, "StartSize")
				return
			}
		case "ts":
			z.TotalSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "TotalSize")
				return
			}
		case "cs":
			z.CurrentSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "CurrentSize")
				return
			}
		case "cmp":
			z.Complete, err = dc.ReadBool()
			if err != nil {

	cs := oi.decryptChecksums(0)
	c := CompleteMultipartUploadResponse{
		Location: location,
		Bucket:   bucket,
		Key:      key,
		// AWS S3 quotes the ETag in XML, make sure we are compatible here.
		ETag:           "\"" + oi.ETag + "\"",
		ChecksumSHA1:   cs[hash.ChecksumSHA1.String()],
		ChecksumSHA256: cs[hash.ChecksumSHA256.String()],

		if err != nil {
			encLogIf(GlobalContext, err)
			return
		}
		data = decrypted
	}
	cs := hash.ReadPartCheckSums(data)
	if len(cs) == len(o.Parts) {
		for i := range o.Parts {
			o.Parts[i].Checksums = cs[i]
		}
	}
	return
}

// metadataEncryptFn provides an encryption function for metadata.
// Will return nil, nil if unencrypted.

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