// Check if bucket exists.
		if _, err := objectAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
			writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
		buckets = append(buckets, BucketInfo{Name: bucket})
	} else {
		buckets, err = objectAPI.ListBuckets(ctx, BucketOptions{})
		if err != nil {
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}
	}