Initial network namespace support.

TCP/IP will work with netstack networking. hostinet doesn't work, and sockets
will have the same behavior as it is now.

Before the userspace is able to create device, the default loopback device can
be used to test.

/proc/net and /sys/net will still be connected to the root network stack; this
is the same behavior now.

Issue #1833

PiperOrigin-RevId: 296309389

1 files changed, 6 insertions, 5 deletions

diff --git a/runsc/boot/controller.go b/runsc/boot/controller.go
index 9c9e94864..17e774e0c 100644
--- a/runsc/boot/controller.go
+++ b/runsc/boot/controller.go
@@ -32,6 +32,7 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/watchdog"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 	"gvisor.dev/gvisor/pkg/urpc"
+	"gvisor.dev/gvisor/runsc/boot/pprof"
 	"gvisor.dev/gvisor/runsc/specutils"
 )
 
@@ -142,7 +143,7 @@ func newController(fd int, l *Loader) (*controller, error) {
 	}
 	srv.Register(manager)
 
-	if eps, ok := l.k.NetworkStack().(*netstack.Stack); ok {
+	if eps, ok := l.k.RootNetworkNamespace().Stack().(*netstack.Stack); ok {
 		net := &Network{
 			Stack: eps.Stack,
 		}
@@ -341,7 +342,7 @@ func (cm *containerManager) Restore(o *RestoreOpts, _ *struct{}) error {
 		return fmt.Errorf("creating memory file: %v", err)
 	}
 	k.SetMemoryFile(mf)
-	networkStack := cm.l.k.NetworkStack()
+	networkStack := cm.l.k.RootNetworkNamespace().Stack()
 	cm.l.k = k
 
 	// Set up the restore environment.
@@ -365,9 +366,9 @@ func (cm *containerManager) Restore(o *RestoreOpts, _ *struct{}) error {
 	}
 
 	if cm.l.conf.ProfileEnable {
-		// initializePProf opens /proc/self/maps, so has to be
-		// called before installing seccomp filters.
-		initializePProf()
+		// pprof.Initialize opens /proc/self/maps, so has to be called before
+		// installing seccomp filters.
+		pprof.Initialize()
 	}
 
 	// Seccomp filters have to be applied before parsing the state file.