libct/configs: move cgroup stuff to libct/cgroups

We have quite a few external users of libcontainer/cgroups packages,
and they all have to depend on libcontainer/configs as well.

Let's move cgroup-related configuration to libcontainer/croups.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

libcontainer/cgroups/cgroups.go

@@ -2,8 +2,6 @@ package cgroups
 
 import (
 	"errors"
-
-	"github.com/opencontainers/runc/libcontainer/configs"
 )
 
 var (
@@ -21,8 +19,8 @@ var (
 	// [github.com/opencontainers/runc/libcontainer/cgroups/devices]
 	// package is imported, it is set to nil, so cgroup managers can't
 	// manage devices.
-	DevicesSetV1 func(path string, r *configs.Resources) error
-	DevicesSetV2 func(path string, r *configs.Resources) error
+	DevicesSetV1 func(path string, r *Resources) error
+	DevicesSetV2 func(path string, r *Resources) error
 )
 
 type Manager interface {
@@ -42,7 +40,7 @@ type Manager interface {
 	GetStats() (*Stats, error)
 
 	// Freeze sets the freezer cgroup to the specified state.
-	Freeze(state configs.FreezerState) error
+	Freeze(state FreezerState) error
 
 	// Destroy removes cgroup.
 	Destroy() error
@@ -54,7 +52,7 @@ type Manager interface {
 	// Set sets cgroup resources parameters/limits. If the argument is nil,
 	// the resources specified during Manager creation (or the previous call
 	// to Set) are used.
-	Set(r *configs.Resources) error
+	Set(r *Resources) error
 
 	// GetPaths returns cgroup path(s) to save in a state file in order to
 	// restore later.
@@ -67,10 +65,10 @@ type Manager interface {
 	GetPaths() map[string]string
 
 	// GetCgroups returns the cgroup data as configured.
-	GetCgroups() (*configs.Cgroup, error)
+	GetCgroups() (*Cgroup, error)
 
 	// GetFreezerState retrieves the current FreezerState of the cgroup.
-	GetFreezerState() (configs.FreezerState, error)
+	GetFreezerState() (FreezerState, error)
 
 	// Exists returns whether the cgroup path exists or not.
 	Exists() bool

libcontainer/cgroups/config_blkio_device.go

@@ -1,4 +1,4 @@
-package configs
+package cgroups
 
 import "fmt"
 

libcontainer/cgroups/config_hugepages.go

@@ -1,4 +1,4 @@
-package configs
+package cgroups
 
 type HugepageLimit struct {
 	// which type of hugepage to limit.

libcontainer/cgroups/config_ifprio_map.go

@@ -1,4 +1,4 @@
-package configs
+package cgroups
 
 import (
 	"fmt"

libcontainer/cgroups/config_linux.go

@@ -1,4 +1,4 @@
-package configs
+package cgroups
 
 import (
 	systemdDbus "github.com/coreos/go-systemd/v22/dbus"

libcontainer/cgroups/config_rdma.go

@@ -1,4 +1,4 @@
-package configs
+package cgroups
 
 // LinuxRdma for Linux cgroup 'rdma' resource management (Linux 4.11)
 type LinuxRdma struct {

libcontainer/cgroups/config_unsupported.go

@@ -1,6 +1,6 @@
 //go:build !linux
 
-package configs
+package cgroups
 
 // Cgroup holds properties of a cgroup on Linux
 // TODO Windows: This can ultimately be entirely factored out on Windows as

libcontainer/configs/cgroup_deprecated.go

@@ -0,0 +1,26 @@
+package configs // Deprecated: use [github.com/opencontainers/runc/libcontainer/cgroups].
+
+import "github.com/opencontainers/runc/libcontainer/cgroups"
+
+type (
+	Cgroup         = cgroups.Cgroup
+	Resources      = cgroups.Resources
+	FreezerState   = cgroups.FreezerState
+	LinuxRdma      = cgroups.LinuxRdma
+	BlockIODevice  = cgroups.BlockIODevice
+	WeightDevice   = cgroups.WeightDevice
+	ThrottleDevice = cgroups.ThrottleDevice
+	HugepageLimit  = cgroups.HugepageLimit
+	IfPrioMap      = cgroups.IfPrioMap
+)
+
+const (
+	Undefined = cgroups.Undefined
+	Frozen    = cgroups.Frozen
+	Thawed    = cgroups.Thawed
+)
+
+var (
+	NewWeightDevice   = cgroups.NewWeightDevice
+	NewThrottleDevice = cgroups.NewThrottleDevice
+)