setDefaultCannedPolicies(m)

	cache.iamPolicyDocsMap = m
	cache.updatedAt = time.Now()

	ret := map[string]policy.Policy{}
	for k, v := range m {
		if bucketName == "" || v.Policy.MatchResource(bucketName) {
			ret[k] = v.Policy
		}
	}

	return ret, nil
}

// ListPolicyDocs - fetches all policy docs from storage and updates cache as well.