libct: devices: drop deprecated cgroup types

These were all marked deprecated in commit a75076b4a4 ("Switch to
opencontainers/cgroups") when we switched maintenance of our cgroup code
to opencontainers/cgroups.

Users have had ample time to switch to opencontainers/cgroups
themselves, so we can finally remove this.

Note that the whole libcontainer/devices package will be moved to
moby/sys in the near future, so this whole package will be marked
deprecated soon.

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>

CHANGELOG.md

@@ -29,6 +29,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
     - `libcontainer/configs.NewThrottleDevice`
   - `libcontainer/configs.HookList.RunHooks`. (#5141)
   - `libcontainer/configs.MPOL_*` (#5414)
+  - All of the types in `libcontainer/devices` which are now maintained in
+    `github.com/opencontainers/cgroups/devices/config` (#5141):
+    - `libcontainer/devices.Wildcard`
+    - `libcontainer/devices.WildcardDevice`
+    - `libcontainer/devices.BlockDevice`
+    - `libcontainer/devices.CharDevice`
+    - `libcontainer/devices.FifoDevice`
+    - `libcontainer/devices.Device`
+    - `libcontainer/devices.Permissions`
+    - `libcontainer/devices.Type`
+    - `libcontainer/devices.Rule`
 
 ## [1.4.0] - 2025-11-27
 

libcontainer/devices/device_deprecated.go

@@ -1,20 +0,0 @@
-package devices
-
-import "github.com/opencontainers/cgroups/devices/config"
-
-// Deprecated: use [github.com/opencontainers/cgroups/devices/config].
-const (
-	Wildcard       = config.Wildcard
-	WildcardDevice = config.WildcardDevice
-	BlockDevice    = config.BlockDevice
-	CharDevice     = config.CharDevice
-	FifoDevice     = config.FifoDevice
-)
-
-// Deprecated: use [github.com/opencontainers/cgroups/devices/config].
-type (
-	Device      = config.Device
-	Permissions = config.Permissions
-	Type        = config.Type
-	Rule        = config.Rule
-)

libcontainer/devices/device_unix.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/opencontainers/cgroups/devices/config"
 	"golang.org/x/sys/unix"
 )
 
@@ -22,7 +23,7 @@ var (
 // DeviceFromPath takes the path to a device and its cgroup_permissions (which
 // cannot be easily queried) to look up the information about a linux device
 // and returns that information as a Device struct.
-func DeviceFromPath(path, permissions string) (*Device, error) {
+func DeviceFromPath(path, permissions string) (*config.Device, error) {
 	var stat unix.Stat_t
 	err := unixLstat(path, &stat)
 	if err != nil {
@@ -30,7 +31,7 @@ func DeviceFromPath(path, permissions string) (*Device, error) {
 	}
 
 	var (
-		devType   Type
+		devType   config.Type
 		mode      = stat.Mode
 		devNumber = uint64(stat.Rdev) //nolint:unconvert // Rdev is uint32 on e.g. MIPS.
 		major     = unix.Major(devNumber)
@@ -38,20 +39,20 @@ func DeviceFromPath(path, permissions string) (*Device, error) {
 	)
 	switch mode & unix.S_IFMT {
 	case unix.S_IFBLK:
-		devType = BlockDevice
+		devType = config.BlockDevice
 	case unix.S_IFCHR:
-		devType = CharDevice
+		devType = config.CharDevice
 	case unix.S_IFIFO:
-		devType = FifoDevice
+		devType = config.FifoDevice
 	default:
 		return nil, ErrNotADevice
 	}
-	return &Device{
-		Rule: Rule{
+	return &config.Device{
+		Rule: config.Rule{
 			Type:        devType,
 			Major:       int64(major),
 			Minor:       int64(minor),
-			Permissions: Permissions(permissions),
+			Permissions: config.Permissions(permissions),
 		},
 		Path:     path,
 		FileMode: os.FileMode(mode &^ unix.S_IFMT),
@@ -61,18 +62,18 @@ func DeviceFromPath(path, permissions string) (*Device, error) {
 }
 
 // HostDevices returns all devices that can be found under /dev directory.
-func HostDevices() ([]*Device, error) {
+func HostDevices() ([]*config.Device, error) {
 	return GetDevices("/dev")
 }
 
 // GetDevices recursively traverses a directory specified by path
 // and returns all devices found there.
-func GetDevices(path string) ([]*Device, error) {
+func GetDevices(path string) ([]*config.Device, error) {
 	files, err := osReadDir(path)
 	if err != nil {
 		return nil, err
 	}
-	var out []*Device
+	var out []*config.Device
 	for _, f := range files {
 		switch {
 		case f.IsDir():
@@ -103,7 +104,7 @@ func GetDevices(path string) ([]*Device, error) {
 			}
 			return nil, err
 		}
-		if device.Type == FifoDevice {
+		if device.Type == config.FifoDevice {
 			continue
 		}
 		out = append(out, device)

libcontainer/devices/device_unix_test.go

@@ -8,6 +8,7 @@ import (
 	"os"
 	"testing"
 
+	"github.com/opencontainers/cgroups/devices/config"
 	"golang.org/x/sys/unix"
 )
 
@@ -85,8 +86,8 @@ func TestHostDevicesAllValid(t *testing.T) {
 			t.Errorf("device entry %+v has zero major number", device)
 		}
 		switch device.Type {
-		case BlockDevice, CharDevice:
-		case FifoDevice:
+		case config.BlockDevice, config.CharDevice:
+		case config.FifoDevice:
 			t.Logf("fifo devices shouldn't show up from HostDevices")
 			fallthrough
 		default: