Move runtime to core/runtime

Signed-off-by: Derek McGowan <derek@mcg.dev>

core/runtime/v2/shim_windows.go

@@ -0,0 +1,97 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package v2
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"os"
+	"sync"
+	"time"
+
+	"github.com/containerd/containerd/v2/pkg/namespaces"
+)
+
+type deferredPipeConnection struct {
+	ctx context.Context
+
+	wg   sync.WaitGroup
+	once sync.Once
+
+	c      net.Conn
+	conerr error
+}
+
+func (dpc *deferredPipeConnection) Read(p []byte) (n int, err error) {
+	if dpc.c == nil {
+		dpc.wg.Wait()
+		if dpc.c == nil {
+			return 0, dpc.conerr
+		}
+	}
+	return dpc.c.Read(p)
+}
+func (dpc *deferredPipeConnection) Close() error {
+	var err error
+	dpc.once.Do(func() {
+		dpc.wg.Wait()
+		if dpc.c != nil {
+			err = dpc.c.Close()
+		} else if dpc.conerr != nil {
+			err = dpc.conerr
+		}
+	})
+	return err
+}
+
+// openShimLog on Windows acts as the client of the log pipe. In this way the
+// containerd daemon can reconnect to the shim log stream if it is restarted.
+func openShimLog(ctx context.Context, bundle *Bundle, dialer func(string, time.Duration) (net.Conn, error)) (io.ReadCloser, error) {
+	ns, err := namespaces.NamespaceRequired(ctx)
+	if err != nil {
+		return nil, err
+	}
+	dpc := &deferredPipeConnection{
+		ctx: ctx,
+	}
+	dpc.wg.Add(1)
+	go func() {
+		c, conerr := dialer(
+			fmt.Sprintf("\\\\.\\pipe\\containerd-shim-%s-%s-log", ns, bundle.ID),
+			time.Second*10,
+		)
+		if conerr != nil {
+			dpc.conerr = fmt.Errorf("failed to connect to shim log: %w", conerr)
+		}
+		dpc.c = c
+		dpc.wg.Done()
+	}()
+	return dpc, nil
+}
+
+func checkCopyShimLogError(ctx context.Context, err error) error {
+	// When using a multi-container shim the 2nd to Nth container in the
+	// shim will not have a separate log pipe. Ignore the failure log
+	// message here when the shim connect times out.
+	if errors.Is(err, os.ErrNotExist) {
+		return nil
+	}
+	return err
+}