if r == nil {
		return nil
	}
	r.Lock()
	defer r.Unlock()
	r.tags = append(r.tags, KeyVal{key, val})
	return r
}

// SetTags - sets key/val to ReqInfo.tags
func (r *ReqInfo) SetTags(key string, val interface{}) *ReqInfo {
	if r == nil {
		return nil
	}
	r.Lock()
	defer r.Unlock()
	// Search of tag key already exists in tags
	var updated bool

		return nil
	}

	// Notify all other MinIO peers to delete policy
	for _, nerr := range globalNotificationSys.DeletePolicy(policyName) {
		if nerr.Err != nil {
			logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
			iamLogIf(ctx, nerr.Err)
		}
	}

	return nil
}

// InfoPolicy - returns the policy definition with some metadata.

		if nerr.Err != nil {
			err := AdminError{
				Code:       AdminUpdateApplyFailure,
				Message:    nerr.Err.Error(),
				StatusCode: http.StatusInternalServerError,
			}
			logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
			adminLogIf(ctx, fmt.Errorf("server update failed with %w", err))
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}
	}

package cmd

import (
	"bytes"
	"context"
	"time"

	"github.com/minio/madmin-go/v3"
)

func commonETags(etags []string) (etag string, maxima int) {
	etagOccurrenceMap := make(map[string]int, len(etags))

	// Ignore the uuid sentinel and count the rest.
	for _, etag := range etags {
		if etag == "" {
			continue
		}
		etagOccurrenceMap[etag]++
	}

// S3 singlepart ETags. It returns nil if the list of
// ETags is empty.
//
// Any encrypted or multipart ETag will be ignored and not
// used to compute the returned ETag.
func Multipart(etags ...ETag) ETag {
	if len(etags) == 0 {
		return nil
	}

	var n int64
	h := md5.New()
	for _, etag := range etags {
		if !etag.IsMultipart() && !etag.IsEncrypted() {

	}
}

var multipartTests = []struct { // Test cases have been generated using AWS S3
	ETags     []ETag
	Multipart ETag
}{
	{
		ETags:     []ETag{},
		Multipart: ETag{},
	},
	{
		ETags:     []ETag{must("b10a8db164e0754105b7a99be72e3fe5")},
		Multipart: must("7b976cc68452e003eec7cb0eb631a19a-1"),
	},
	{
		ETags:     []ETag{must("5f363e0e58a95f06cbe9bbc662c5dfb6"), must("5f363e0e58a95f06cbe9bbc662c5dfb6")},

	mac := hmac.New(sha256.New, key[:])
	mac.Write(bin[:])
	mac.Sum(partKey[:0])
	return partKey
}

// SealETag seals the etag using the object key.
// It does not encrypt empty ETags because such ETags indicate
// that the S3 client hasn't sent an ETag = MD5(object) and
// the backend can pick an ETag value.
func (key ObjectKey) SealETag(etag []byte) []byte {

// objects are slightly larger due to encryption overhead.
// Further, it decrypts all single-part SSE-S3 encrypted objects
// and formats ETags of SSE-C / SSE-KMS encrypted objects to
// be AWS S3 compliant.
//
// DecryptETags uses a KMS bulk decryption API, if available, which
// is more efficient than decrypting ETags sequentually.
func DecryptETags(ctx context.Context, k kms.KMS, objects []ObjectInfo) error {

                    buf.append(",\"labels\":[");
                    for (int i = 0; i < item.getTags().length; i++) {
                        if (i > 0) {
                            buf.append(',');
                        }
                        buf.append('\"').append(StringEscapeUtils.escapeJson(item.getTags()[i])).append('\"');
                    }
                    buf.append(']');

// A Reader wraps an io.Reader and computes the
// MD5 checksum of the read content as ETag.
//
// Optionally, a Reader can also verify that
// the computed ETag matches an expected value.
// Therefore, it compares both ETags once the
// underlying io.Reader returns io.EOF.
// If the computed ETag does not match the
// expected ETag then Read returns a VerifyError.
//
// Reader implements the Tagger interface.
type Reader struct {