Allow containers/storage to handle on SELinux labeling

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

libpod/container.go

@@ -243,6 +243,8 @@ type ContainerConfig struct {
 	ProcessLabel string `json:"ProcessLabel,omitempty"`
 	// SELinux mount label for root filesystem
 	MountLabel string `json:"MountLabel,omitempty"`
+	// LabelOpts are options passed in by the user to setup SELinux labels
+	LabelOpts []string `json:"labelopts,omitempty"`
 	// User and group to use in the container
 	// Can be specified by name or UID/GID
 	User string `json:"user,omitempty"`

libpod/container_inspect.go

@@ -79,9 +79,9 @@ func (c *Container) getContainerInspectData(size bool, driverData *inspect.Data)
 		Name:            config.Name,
 		Driver:          driverData.Name,
 		MountLabel:      config.MountLabel,
+		ProcessLabel:    config.ProcessLabel,
 		EffectiveCaps:   spec.Process.Capabilities.Effective,
 		BoundingCaps:    spec.Process.Capabilities.Bounding,
-		ProcessLabel:    spec.Process.SelinuxLabel,
 		AppArmorProfile: spec.Process.ApparmorProfile,
 		ExecIDs:         execIDs,
 		GraphDriver:     driverData,
@@ -93,6 +93,7 @@ func (c *Container) getContainerInspectData(size bool, driverData *inspect.Data)
 			HairpinMode:            false, // TODO
 			LinkLocalIPv6Address:   "",    // TODO - do we even support IPv6?
 			LinkLocalIPv6PrefixLen: 0,     // TODO - do we even support IPv6?
+
 			Ports:                  []ocicni.PortMapping{}, // TODO - maybe worth it to put this in Docker format?
 			SandboxKey:             "",                     // Network namespace path
 			SecondaryIPAddresses:   nil,                    // TODO - do we support this?

libpod/container_internal.go

@@ -194,12 +194,18 @@ func (c *Container) setupStorage(ctx context.Context) error {
 		return errors.Wrapf(ErrInvalidArg, "must provide image ID and image name to use an image")
 	}
 
-	var options *storage.ContainerOptions
-	if c.config.Rootfs == "" {
-		options = &storage.ContainerOptions{c.config.IDMappings}
-
+	options := storage.ContainerOptions{
+		IDMappingOptions: storage.IDMappingOptions{
+			HostUIDMapping: true,
+			HostGIDMapping: true,
+		},
+		LabelOpts: c.config.LabelOpts,
 	}
-	containerInfo, err := c.runtime.storageService.CreateContainerStorage(ctx, c.runtime.imageContext, c.config.RootfsImageName, c.config.RootfsImageID, c.config.Name, c.config.ID, c.config.MountLabel, options)
+
+	if c.config.Rootfs == "" {
+		options.IDMappingOptions = c.config.IDMappings
+	}
+	containerInfo, err := c.runtime.storageService.CreateContainerStorage(ctx, c.runtime.imageContext, c.config.RootfsImageName, c.config.RootfsImageID, c.config.Name, c.config.ID, options)
 	if err != nil {
 		return errors.Wrapf(err, "error creating container storage")
 	}
@@ -225,6 +231,8 @@ func (c *Container) setupStorage(ctx context.Context) error {
 		}
 	}
 
+	c.config.ProcessLabel = containerInfo.ProcessLabel
+	c.config.MountLabel = containerInfo.MountLabel
 	c.config.StaticDir = containerInfo.Dir
 	c.state.RunDir = containerInfo.RunDir
 	c.state.DestinationRunDir = c.state.RunDir

libpod/options.go

@@ -391,11 +391,7 @@ func WithSecLabels(labelOpts []string) CtrCreateOption {
 		if ctr.valid {
 			return ErrCtrFinalized
 		}
-		var err error
-		ctr.config.ProcessLabel, ctr.config.MountLabel, err = ctr.runtime.initLabels(labelOpts)
-		if err != nil {
-			return errors.Wrapf(err, "failed to init labels")
-		}
+		ctr.config.LabelOpts = labelOpts
 		return nil
 	}
 }

libpod/runtime_ctr.go

@@ -11,7 +11,6 @@ import (
 	"github.com/containers/storage"
 	"github.com/containers/storage/pkg/stringid"
 	spec "github.com/opencontainers/runtime-spec/specs-go"
-	"github.com/opencontainers/selinux/go-selinux/label"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/ulule/deepcopier"
@@ -329,10 +328,6 @@ func (r *Runtime) removeContainer(ctx context.Context, c *Container, force bool)
 		}
 	}
 
-	if r.config.EnableLabeling {
-		label.ReleaseLabel(c.ProcessLabel())
-		r.reserveLabels()
-	}
 	// Delete the container.
 	// Not needed in Configured and Exited states, where the container
 	// doesn't exist in the runtime
@@ -467,28 +462,3 @@ func (r *Runtime) GetLatestContainer() (*Container, error) {
 	}
 	return ctrs[lastCreatedIndex], nil
 }
-
-// reserveLabels walks the list o fcontainers and reserves the label, so new containers will not
-// get them.
-// TODO Performance wise this should only run if the state has changed since the last time it was run.
-func (r *Runtime) reserveLabels() error {
-	containers, err := r.state.AllContainers()
-	if err != nil {
-		return err
-	}
-	for _, ctr := range containers {
-		label.ReserveLabel(ctr.ProcessLabel())
-	}
-	return nil
-}
-
-// initLabels allocates an new label to return to the caller
-func (r *Runtime) initLabels(labelOpts []string) (string, string, error) {
-	if !r.config.EnableLabeling {
-		return "", "", nil
-	}
-	if err := r.reserveLabels(); err != nil {
-		return "", "", errors.Wrapf(err, "unable to reserve labels")
-	}
-	return label.InitLabels(labelOpts)
-}

libpod/storage.go

@@ -27,10 +27,13 @@ func getStorageService(store storage.Store) (*storageService, error) {
 // of its nonvolatile and volatile per-container directories, along with a copy
 // of the configuration blob from the image that was used to create the
 // container, if the image had a configuration.
+// It also returns the ProcessLabel and MountLabel selected for the container
 type ContainerInfo struct {
 	Dir          string
 	RunDir       string
 	Config       *v1.Image
+	ProcessLabel string
+	MountLabel   string
 }
 
 // RuntimeContainerMetadata is the structure that we encode as JSON and store
@@ -59,7 +62,7 @@ func (metadata *RuntimeContainerMetadata) SetMountLabel(mountLabel string) {
 
 // CreateContainerStorage creates the storage end of things.  We already have the container spec created
 // TO-DO We should be passing in an Image object in the future.
-func (r *storageService) CreateContainerStorage(ctx context.Context, systemContext *types.SystemContext, imageName, imageID, containerName, containerID, mountLabel string, options *storage.ContainerOptions) (cinfo ContainerInfo, err error) {
+func (r *storageService) CreateContainerStorage(ctx context.Context, systemContext *types.SystemContext, imageName, imageID, containerName, containerID string, options storage.ContainerOptions) (cinfo ContainerInfo, err error) {
 	var imageConfig *v1.Image
 	if imageName != "" {
 		var ref types.ImageReference
@@ -101,7 +104,6 @@ func (r *storageService) CreateContainerStorage(ctx context.Context, systemConte
 		ImageID:       imageID,
 		ContainerName: containerName,
 		CreatedAt:     time.Now().Unix(),
-		MountLabel:    mountLabel,
 	}
 	mdata, err := json.Marshal(&metadata)
 	if err != nil {
@@ -111,15 +113,7 @@ func (r *storageService) CreateContainerStorage(ctx context.Context, systemConte
 	// Build the container.
 	names := []string{containerName}
 
-	if options == nil {
-		options = &storage.ContainerOptions{
-			IDMappingOptions: storage.IDMappingOptions{
-				HostUIDMapping: true,
-				HostGIDMapping: true,
-			},
-		}
-	}
-	container, err := r.store.CreateContainer(containerID, names, imageID, "", string(mdata), options)
+	container, err := r.store.CreateContainer(containerID, names, imageID, "", string(mdata), &options)
 	if err != nil {
 		logrus.Debugf("failed to create container %s(%s): %v", metadata.ContainerName, containerID, err)
 
@@ -170,6 +164,8 @@ func (r *storageService) CreateContainerStorage(ctx context.Context, systemConte
 		Dir:          containerDir,
 		RunDir:       containerRunDir,
 		Config:       imageConfig,
+		ProcessLabel: container.ProcessLabel(),
+		MountLabel:   container.MountLabel(),
 	}, nil
 }