@@ -11,7 +11,6 @@ import (

 	"github.com/docker/docker/daemon/cluster/convert"

 	networkSettings "github.com/docker/docker/daemon/network"

 	"github.com/docker/docker/errdefs"

-	"github.com/docker/docker/runconfig"

 	swarmapi "github.com/moby/swarmkit/v2/api"

 	"github.com/pkg/errors"

 )

@@ -269,7 +268,7 @@ func (c *Cluster) DetachNetwork(target string, containerID string) error {

 // CreateNetwork creates a new cluster managed network.

 func (c *Cluster) CreateNetwork(s network.CreateRequest) (string, error) {

-	if runconfig.IsPreDefinedNetwork(s.Name) {

+	if networkSettings.IsPredefined(s.Name) {

 		err := notAllowedError(fmt.Sprintf("%s is a pre-defined network and cannot be created", s.Name))

 		return "", errors.WithStack(err)

 	}

@@ -314,7 +313,7 @@ func (c *Cluster) populateNetworkID(ctx context.Context, client swarmapi.Control

 		apiNetwork, err := getNetwork(ctx, client, nw.Target)

 		if err != nil {

 			ln, _ := c.config.Backend.FindNetwork(nw.Target)

-			if ln != nil && runconfig.IsPreDefinedNetwork(ln.Name()) {

+			if ln != nil && networkSettings.IsPredefined(ln.Name()) {

 				// Need to retrieve the corresponding predefined swarm network

 				// and use its id for the request.

 				apiNetwork, err = getNetwork(ctx, client, ln.Name())

@@ -31,7 +31,6 @@ import (

 	lntypes "github.com/docker/docker/libnetwork/types"

 	"github.com/docker/docker/opts"

 	"github.com/docker/docker/pkg/plugingetter"

-	"github.com/docker/docker/runconfig"

 	"github.com/docker/go-connections/nat"

 )

@@ -290,7 +289,7 @@ func (daemon *Daemon) CreateNetwork(create networktypes.CreateRequest) (*network

 }

 func (daemon *Daemon) createNetwork(cfg *config.Config, create networktypes.CreateRequest, id string, agent bool) (*networktypes.CreateResponse, error) {

-	if runconfig.IsPreDefinedNetwork(create.Name) {

+	if network.IsPredefined(create.Name) {

 		return nil, PredefinedNetworkError(create.Name)

 	}

@@ -543,13 +542,13 @@ func (daemon *Daemon) DeleteNetwork(networkID string) error {

 }

 func (daemon *Daemon) deleteNetwork(nw *libnetwork.Network, dynamic bool) error {

-	if runconfig.IsPreDefinedNetwork(nw.Name()) && !dynamic {

+	if network.IsPredefined(nw.Name()) && !dynamic {

 		err := fmt.Errorf("%s is a pre-defined network and cannot be removed", nw.Name())

 		return errdefs.Forbidden(err)

 	}

 	if dynamic && !nw.Dynamic() {

-		if runconfig.IsPreDefinedNetwork(nw.Name()) {

+		if network.IsPredefined(nw.Name()) {

 			// Predefined networks now support swarm services. Make this

 			// a no-op when cluster requests to remove the predefined network.

 			return nil

@@ -4,7 +4,6 @@ import (

 	"github.com/docker/docker/api/types/filters"

 	"github.com/docker/docker/api/types/network"

 	"github.com/docker/docker/errdefs"

-	"github.com/docker/docker/runconfig"

 	"github.com/pkg/errors"

 )

@@ -94,9 +93,9 @@ func filterNetworkByUse(nws []network.Inspect, danglingOnly bool) []network.Insp

 	filterFunc := func(nw network.Inspect) bool {

 		if danglingOnly {

-			return !runconfig.IsPreDefinedNetwork(nw.Name) && len(nw.Containers) == 0 && len(nw.Services) == 0

+			return !IsPredefined(nw.Name) && len(nw.Containers) == 0 && len(nw.Services) == 0

 		}

-		return runconfig.IsPreDefinedNetwork(nw.Name) || len(nw.Containers) > 0 || len(nw.Services) > 0

+		return IsPredefined(nw.Name) || len(nw.Containers) > 0 || len(nw.Services) > 0

 	}

 	for _, nw := range nws {

@@ -113,13 +112,13 @@ func filterNetworkByType(nws []network.Inspect, netType string) ([]network.Inspe

 	switch netType {

 	case "builtin":

 		for _, nw := range nws {

-			if runconfig.IsPreDefinedNetwork(nw.Name) {

+			if IsPredefined(nw.Name) {

 				retNws = append(retNws, nw)

 			}

 		}

 	case "custom":

 		for _, nw := range nws {

-			if !runconfig.IsPreDefinedNetwork(nw.Name) {

+			if !IsPredefined(nw.Name) {

 				retNws = append(retNws, nw)

 			}

 		}

@@ -5,3 +5,9 @@ package network

 // ([network.NetworkBridge]), and "nat" ([network.NetworkNat]) for Windows

 // containers.

 const DefaultNetwork = defaultNetwork

+

+// IsPredefined indicates if a network is predefined by the daemon.

+func IsPredefined(network string) bool {

+	// TODO(thaJeztah): check if we can align the check for both platforms

+	return isPreDefined(network)

+}

@@ -2,6 +2,14 @@

 package network

-import "github.com/docker/docker/api/types/network"

+import (

+	"github.com/docker/docker/api/types/container"

+	"github.com/docker/docker/api/types/network"

+)

 const defaultNetwork = network.NetworkBridge

+

+func isPreDefined(network string) bool {

+	n := container.NetworkMode(network)

+	return n.IsBridge() || n.IsHost() || n.IsNone() || n.IsDefault()

+}

@@ -1,5 +1,12 @@

 package network

-import "github.com/docker/docker/api/types/network"

+import (

+	"github.com/docker/docker/api/types/container"

+	"github.com/docker/docker/api/types/network"

+)

 const defaultNetwork = network.NetworkNat

+

+func isPreDefined(network string) bool {

+	return !container.NetworkMode(network).IsUserDefined()

+}

@@ -14,9 +14,9 @@ import (

 	"github.com/docker/docker/api/types/filters"

 	"github.com/docker/docker/api/types/network"

 	timetypes "github.com/docker/docker/api/types/time"

+	networkSettings "github.com/docker/docker/daemon/network"

 	"github.com/docker/docker/errdefs"

 	"github.com/docker/docker/libnetwork"

-	"github.com/docker/docker/runconfig"

 	"github.com/pkg/errors"

 )

@@ -121,7 +121,7 @@ func (daemon *Daemon) localNetworksPrune(ctx context.Context, pruneFilters filte

 			return false

 		}

 		nwName := nw.Name()

-		if runconfig.IsPreDefinedNetwork(nwName) {

+		if networkSettings.IsPredefined(nwName) {

 			return false

 		}

 		if len(nw.Endpoints()) > 0 {

@@ -20,6 +20,8 @@ func DefaultDaemonNetworkMode() container.NetworkMode {

 }

 // IsPreDefinedNetwork indicates if a network is predefined by the daemon

+//

+// Deprecated: this function is no longer used and will be removed in the next release.

 func IsPreDefinedNetwork(network string) bool {

 	n := container.NetworkMode(network)

 	return n.IsBridge() || n.IsHost() || n.IsNone() || n.IsDefault()

@@ -16,7 +16,9 @@ func DefaultDaemonNetworkMode() container.NetworkMode {

 	return network.NetworkNat

 }

-// IsPreDefinedNetwork indicates if a network is predefined by the daemon

+// IsPreDefinedNetwork indicates if a network is predefined by the daemon.

+//

+// Deprecated: this function is no longer used and will be removed in the next release.

 func IsPreDefinedNetwork(network string) bool {

 	return !container.NetworkMode(network).IsUserDefined()

 }