if s3Error = reqSignatureV4Verify(r, globalSite.Region(), serviceS3); s3Error != ErrNone {
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
			return
		}

		if !skipContentSha256Cksum(r) {
			sha256hex = getContentSha256Cksum(r, serviceS3)
		}
	}

	if err := enforceBucketQuotaHard(ctx, bucket, size); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return