Port /dev/net/tun device to VFS2.

Updates #2912 #1035

PiperOrigin-RevId: 318162565

1 files changed, 9 insertions, 2 deletions

diff --git a/runsc/boot/vfs.go b/runsc/boot/vfs.go
index 2fdddc719..9ba5e9cd9 100644
--- a/runsc/boot/vfs.go
+++ b/runsc/boot/vfs.go
@@ -27,6 +27,7 @@ import (
 	"gvisor.dev/gvisor/pkg/log"
 	"gvisor.dev/gvisor/pkg/sentry/devices/memdev"
 	"gvisor.dev/gvisor/pkg/sentry/devices/ttydev"
+	"gvisor.dev/gvisor/pkg/sentry/devices/tundev"
 	"gvisor.dev/gvisor/pkg/sentry/fs/user"
 	"gvisor.dev/gvisor/pkg/sentry/fsimpl/devpts"
 	"gvisor.dev/gvisor/pkg/sentry/fsimpl/devtmpfs"
@@ -79,6 +80,9 @@ func registerFilesystems(ctx context.Context, vfsObj *vfs.VirtualFilesystem, cre
 	if err := ttydev.Register(vfsObj); err != nil {
 		return fmt.Errorf("registering ttydev: %w", err)
 	}
+	if err := tundev.Register(vfsObj); err != nil {
+		return fmt.Errorf("registering tundev: %v", err)
+	}
 	a, err := devtmpfs.NewAccessor(ctx, vfsObj, creds, devtmpfs.Name)
 	if err != nil {
 		return fmt.Errorf("creating devtmpfs accessor: %w", err)
@@ -89,10 +93,13 @@ func registerFilesystems(ctx context.Context, vfsObj *vfs.VirtualFilesystem, cre
 		return fmt.Errorf("initializing userspace: %w", err)
 	}
 	if err := memdev.CreateDevtmpfsFiles(ctx, a); err != nil {
-		return fmt.Errorf("creating devtmpfs files: %w", err)
+		return fmt.Errorf("creating memdev devtmpfs files: %w", err)
 	}
 	if err := ttydev.CreateDevtmpfsFiles(ctx, a); err != nil {
-		return fmt.Errorf("creating devtmpfs files: %w", err)
+		return fmt.Errorf("creating ttydev devtmpfs files: %w", err)
+	}
+	if err := tundev.CreateDevtmpfsFiles(ctx, a); err != nil {
+		return fmt.Errorf("creating tundev devtmpfs files: %v", err)
 	}
 	return nil
 }