Move shim protos into linux pkg

This moves the shim's API and protos out of the containerd services
package and into the linux runtime package. This is because the shim is
an implementation detail of the linux runtime that we have and it is not
a containerd user facing api.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

linux/shim/local.go

@@ -0,0 +1,126 @@
+// +build !windows
+
+package shim
+
+import (
+	"path/filepath"
+
+	shimapi "github.com/containerd/containerd/linux/shim/v1"
+	google_protobuf "github.com/golang/protobuf/ptypes/empty"
+	"golang.org/x/net/context"
+	"golang.org/x/sys/unix"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+)
+
+// NewLocal returns a shim client implementation for issue commands to a shim
+func NewLocal(s *Service) shimapi.ShimClient {
+	return &local{
+		s: s,
+	}
+}
+
+type local struct {
+	s *Service
+}
+
+func (c *local) Create(ctx context.Context, in *shimapi.CreateTaskRequest, opts ...grpc.CallOption) (*shimapi.CreateTaskResponse, error) {
+	return c.s.Create(ctx, in)
+}
+
+func (c *local) Start(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
+	return c.s.Start(ctx, in)
+}
+
+func (c *local) Delete(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*shimapi.DeleteResponse, error) {
+	// make sure we unmount the containers rootfs for this local
+	if err := unix.Unmount(filepath.Join(c.s.path, "rootfs"), 0); err != nil {
+		return nil, err
+	}
+	return c.s.Delete(ctx, in)
+}
+
+func (c *local) DeleteProcess(ctx context.Context, in *shimapi.DeleteProcessRequest, opts ...grpc.CallOption) (*shimapi.DeleteResponse, error) {
+	return c.s.DeleteProcess(ctx, in)
+}
+
+func (c *local) Exec(ctx context.Context, in *shimapi.ExecProcessRequest, opts ...grpc.CallOption) (*shimapi.ExecProcessResponse, error) {
+	return c.s.Exec(ctx, in)
+}
+
+func (c *local) ResizePty(ctx context.Context, in *shimapi.ResizePtyRequest, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
+	return c.s.ResizePty(ctx, in)
+}
+
+func (c *local) Stream(ctx context.Context, in *shimapi.StreamEventsRequest, opts ...grpc.CallOption) (shimapi.Shim_StreamClient, error) {
+	return &events{
+		c:   c.s.events,
+		ctx: ctx,
+	}, nil
+}
+
+func (c *local) State(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*shimapi.StateResponse, error) {
+	return c.s.State(ctx, in)
+}
+
+func (c *local) Pause(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
+	return c.s.Pause(ctx, in)
+}
+
+func (c *local) Resume(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
+	return c.s.Resume(ctx, in)
+}
+
+func (c *local) Kill(ctx context.Context, in *shimapi.KillRequest, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
+	return c.s.Kill(ctx, in)
+}
+
+func (c *local) ListProcesses(ctx context.Context, in *shimapi.ListProcessesRequest, opts ...grpc.CallOption) (*shimapi.ListProcessesResponse, error) {
+	return c.s.ListProcesses(ctx, in)
+}
+
+func (c *local) CloseIO(ctx context.Context, in *shimapi.CloseIORequest, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
+	return c.s.CloseIO(ctx, in)
+}
+
+func (c *local) Checkpoint(ctx context.Context, in *shimapi.CheckpointTaskRequest, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
+	return c.s.Checkpoint(ctx, in)
+}
+
+func (c *local) ShimInfo(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*shimapi.ShimInfoResponse, error) {
+	return c.s.ShimInfo(ctx, in)
+}
+
+type events struct {
+	c   chan *shimapi.Event
+	ctx context.Context
+}
+
+func (e *events) Recv() (*shimapi.Event, error) {
+	ev := <-e.c
+	return ev, nil
+}
+
+func (e *events) Header() (metadata.MD, error) {
+	return nil, nil
+}
+
+func (e *events) Trailer() metadata.MD {
+	return nil
+}
+
+func (e *events) CloseSend() error {
+	return nil
+}
+
+func (e *events) Context() context.Context {
+	return e.ctx
+}
+
+func (e *events) SendMsg(m interface{}) error {
+	return nil
+}
+
+func (e *events) RecvMsg(m interface{}) error {
+	return nil
+}