func LookupConfig(kvs config.KVS) (cfg Config, err error) {
	if err = config.CheckValidKeys(config.CallhomeSubSys, kvs, DefaultKVS); err != nil {
		return cfg, err
	}

	cfg.Enable = env.Get(config.EnvMinIOCallhomeEnable,
		kvs.GetWithDefault(Enable, DefaultKVS)) == config.EnableOn
	cfg.Frequency, err = time.ParseDuration(env.Get(config.EnvMinIOCallhomeFrequency,
		kvs.GetWithDefault(Frequency, DefaultKVS)))

type Opa struct {
	args   Args
	client *http.Client
}

// Enabled returns if opa is enabled.
func Enabled(kvs config.KVS) bool {
	return kvs.Get(URL) != ""
}

// LookupConfig lookup Opa from config, override with any ENVs.
func LookupConfig(kv config.KVS, transport *http.Transport, closeRespFn func(io.ReadCloser)) (Args, error) {
	args := Args{}

// LookupConfig - lookup config and override with valid environment settings if any.
func LookupConfig(kvs config.KVS, transport http.RoundTripper) (cfg Config, err error) {
	if err = config.CheckValidKeys(config.SubnetSubSys, kvs, DefaultKVS); err != nil {
		return cfg, err
	}

	var proxyURL *xnet.URL
	proxy := env.Get(config.EnvMinIOSubnetProxy, kvs.Get(config.Proxy))
	if len(proxy) > 0 {
		proxyURL, err = xnet.ParseHTTPURL(proxy)

func LookupConfig(kvs config.KVS) (cfg Config, err error) {
	cfg = Config{
		MaxTimeout: 30 * time.Second,
	}
	if err = config.CheckValidKeys(config.DriveSubSys, kvs, DefaultKVS); err != nil {
		return cfg, err
	}

	// if not set. Get default value from environment
	d := env.Get(EnvMaxDriveTimeout, env.Get(EnvMaxDriveTimeoutLegacy, env.Get(EnvMaxDiskTimeoutLegacy, kvs.GetWithDefault(MaxTimeout, DefaultKVS))))

	if err != nil {
		return nil, err
	}
	if cap(dst.KVS) < len(elems.Elements) {
		dst.KVS = make(jstream.KVS, 0, len(elems.Elements))
	}
	for _, elem := range elems.Elements {
		v, err := sql.IterToValue(elem.Iter)
		if err != nil {
			v, err = elem.Iter.Interface()
			if err != nil {
				panic(err)
			}
		}
		dst.KVS = append(dst.KVS, jstream.KV{
			Key:   elem.Name,
			Value: v,
		})
	}

	Key   string      `json:"key"`
	Value interface{} `json:"value"`
}

// KVS - represents key values in an JSON object
type KVS []KV

// MarshalJSON - implements converting a KVS datastructure into a JSON
// object with multiple keys and values.
func (kvs KVS) MarshalJSON() ([]byte, error) {
	b := new(bytes.Buffer)
	b.Write([]byte("{"))
	for i, kv := range kvs {
		b.Write([]byte("\"" + kv.Key + "\"" + ":"))

func LookupConfig(kvs config.KVS, setDriveCount int) (cfg Config, err error) {
	cfg = Config{}

	deprecatedKeys := []string{
		"dma",
	}

	if err = config.CheckValidKeys(config.StorageClassSubSys, kvs, DefaultKVS, deprecatedKeys...); err != nil {
		return Config{}, err
	}

	ssc := env.Get(StandardEnv, kvs.Get(ClassStandard))
	rrsc := env.Get(RRSEnv, kvs.Get(ClassRRS))

	d := jstream.NewDecoder(r, 0).ObjectAsKVS().MaxDepth(10)
	sset := set.NewStringSet()
	for mv := range d.Stream() {
		var kvs jstream.KVS
		if mv.ValueType == jstream.Object {
			// This is a JSON object type (that preserves key order)
			kvs = mv.Value.(jstream.KVS)
			for _, kv := range kvs {
				if sset.Contains(kv.Key) {
					// Reject duplicate conditions or expiration.

}

// AuthZPlugin - implements opa policy agent calls.
type AuthZPlugin struct {
	args   Args
	client *http.Client
}

// Enabled returns if AuthZPlugin is enabled.
func Enabled(kvs config.KVS) bool {
	return kvs.Get(URL) != ""
}

// LookupConfig lookup AuthZPlugin from config, override with any ENVs.
func LookupConfig(s config.Config, httpSettings xhttp.ConnSettings, closeRespFn func(io.ReadCloser)) (Args, error) {

	// remove this since we have removed support for this already.
	for k := range s[config.IdentityOpenIDSubSys] {
		for _, dk := range deprecatedKeys {
			kvs := s[config.IdentityOpenIDSubSys][k]
			kvs.Delete(dk)
			s[config.IdentityOpenIDSubSys][k] = kvs
		}
	}

	if err := s.CheckValidKeys(config.IdentityOpenIDSubSys, deprecatedKeys); err != nil {
		return c, err
	}