@@ -705,7 +705,7 @@ func buildRouters(opts routerOptions) []router.Router {

 	routers := []router.Router{

 		// we need to add the checkpoint router before the container router or the DELETE gets masked

 		checkpointrouter.NewRouter(opts.daemon),

-		container.NewRouter(opts.daemon, opts.daemon.RawSysInfo()),

+		container.NewRouter(opts.daemon),

 		image.NewRouter(

 			opts.daemon.ImageService(),

 			opts.daemon.RegistryService(),

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

 	containerpkg "github.com/docker/docker/daemon/container"

 	"github.com/docker/docker/daemon/server/backend"

+	"github.com/docker/docker/pkg/sysinfo"

 	"github.com/moby/go-archive"

 	"github.com/moby/moby/api/types/container"

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

@@ -68,6 +69,10 @@ type commitBackend interface {

 	CreateImageFromContainer(ctx context.Context, name string, config *backend.CreateImageConfig) (imageID string, err error)

 }

+type sysInfoProvider interface {

+	RawSysInfo() *sysinfo.SysInfo

+}

+

 // Backend is all the methods that need to be implemented to provide container specific functionality.

 type Backend interface {

 	commitBackend

@@ -77,4 +82,5 @@ type Backend interface {

 	monitorBackend

 	attachBackend

 	systemBackend

+	sysInfoProvider

 }

@@ -1,22 +1,17 @@

 package container

-import (

-	"github.com/docker/docker/daemon/server/router"

-	"github.com/docker/docker/pkg/sysinfo"

-)

+import "github.com/docker/docker/daemon/server/router"

 // containerRouter is a router to talk with the container controller

 type containerRouter struct {

 	backend Backend

-	sysInfo *sysinfo.SysInfo

 	routes  []router.Route

 }

 // NewRouter initializes a new container router

-func NewRouter(b Backend, sysInfo *sysinfo.SysInfo) router.Router {

+func NewRouter(b Backend) router.Router {

 	r := &containerRouter{

 		backend: b,

-		sysInfo: sysInfo,

 	}

 	r.initRoutes()

 	return r

@@ -498,7 +498,7 @@ func (c *containerRouter) postContainersCreate(ctx context.Context, w http.Respo

 	name := r.Form.Get("name")

 	// TODO(thaJeztah): do we prefer [backend.ContainerCreateConfig] here?

-	req, err := runconfig.DecodeCreateRequest(r.Body, c.sysInfo)

+	req, err := runconfig.DecodeCreateRequest(r.Body, c.backend.RawSysInfo())

 	if err != nil {

 		return err

 	}

@@ -547,7 +547,7 @@ func (c *containerRouter) postContainersCreate(ctx context.Context, w http.Respo

 	if versions.LessThan(version, "1.41") {

 		// Older clients expect the default to be "host" on cgroup v1 hosts

-		if !c.sysInfo.CgroupUnified && hostConfig.CgroupnsMode.IsEmpty() {

+		if hostConfig.CgroupnsMode.IsEmpty() && !c.backend.RawSysInfo().CgroupUnified {

 			hostConfig.CgroupnsMode = container.CgroupnsModeHost

 		}

 	}