o = msgp.AppendNil(o)
		} else {
			o, err = z.ReplicationStats.MarshalMsg(o)
			if err != nil {
				err = msgp.WrapError(err, "ReplicationStats")
				return
			}
		}
	}
	if (zb0001Mask & 0x100) == 0 { // if not omitted
		// string "ats"
		o = append(o, 0xa3, 0x61, 0x74, 0x73)
		if z.AllTierStats == nil {
			o = msgp.AppendNil(o)
		} else {
			o, err = z.AllTierStats.MarshalMsg(o)

				} // overlay tags from peer site.
				ot = tags
				w.Header()[xhttp.MinIOTaggingProxied] = []string{"true"} // indicate that the request was proxied.
			} else {
				writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
				return
			}
		} else {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
	}

// and If-Unmodified-Since headers set are validated.
// If-Modified-Since - Return the object only if it has been modified since the specified time, else return a 304 (not modified).
// If-Unmodified-Since - Return the object only if it has not been modified since the specified time, else return a 412 (precondition failed).
func (s *TestSuiteCommon) TestHeadOnObjectLastModified(c *check) {
	// generate a random bucket name.

				if !ok {
					clusterObjectSizesHistogram[k] = v
				} else {
					v1 += v
					clusterObjectSizesHistogram[k] = v1
				}
			}
			for k, v := range usage.ObjectVersionsHistogram {
				v1, ok := clusterVersionsHistogram[k]
				if !ok {
					clusterVersionsHistogram[k] = v
				} else {
					v1 += v
					clusterVersionsHistogram[k] = v1
				}
			}
		}

			globalBucketTargetSys.markOffline(tgt.EndpointURL())
		}
	} else {
		if dobj.VersionID == "" {
			rinfo.ReplicationStatus = replication.Completed
		} else {
			rinfo.VersionPurgeStatus = Complete
		}
	}
	return
}

func getCopyObjMetadata(oi ObjectInfo, sc string) map[string]string {
	meta := make(map[string]string, len(oi.UserDefined))

	}
	if z.Data == nil { // allownil: if nil
		o = msgp.AppendNil(o)
	} else {
		o = msgp.AppendBytes(o, z.Data)
	}
	o = msgp.AppendInt(o, z.NumVersions)
	o = msgp.AppendTime(o, z.SuccessorModTime)
	o = msgp.AppendBool(o, z.Fresh)
	o = msgp.AppendInt(o, z.Idx)
	if z.Checksum == nil { // allownil: if nil
		o = msgp.AppendNil(o)
	} else {
		o = msgp.AppendBytes(o, z.Checksum)
	}

				iamLogIf(ctx, err)
			} else if foundGroupDN == "" || !underBaseDN {
				err = errNoSuchGroup
			}
			entityName = foundGroupDN
		} else {
			var foundUserDN string
			if foundUserDN, err = globalIAMSys.LDAPConfig.GetValidatedDNForUsername(entityName); err != nil {
				iamLogIf(ctx, err)
			} else if foundUserDN == "" {
				err = errNoSuchUser
			}

				Host:           local,
				Err:            err.Error(),
				CurrentVersion: Version,
			}
		} else {
			peerResults[local] = madmin.ServerPeerUpdateStatus{
				Host:           local,
				CurrentVersion: Version,
				UpdatedVersion: lrTime.Format(MinioReleaseTagTimeLayout),
			}
		}
	} else {
		peerResults[local] = madmin.ServerPeerUpdateStatus{
			Host:           local,

		}
		if testCase.copySourceRange != "" {
			if testCase.copySourceRange == "empty" {
				req.Header.Set("X-Amz-Copy-Source-Range", "") // specifically test for S3 errors in this scenario.
			} else {
				req.Header.Set("X-Amz-Copy-Source-Range", testCase.copySourceRange)
			}
		}

		// Since `apiRouter` satisfies `http.Handler` it has a ServeHTTP to execute the logic of the handler.