Skip IFLA_TXQLEN and IFA_BROADCAST in gVisor.

The attributes are expected by Dockerd to start. In gVisor, skipping
the attributes is good enough to run the Docker workloads.

PiperOrigin-RevId: 650362257

pkg/sentry/socket/netlink/route/protocol.go

@@ -515,6 +515,10 @@ func (p *Protocol) newAddr(ctx context.Context, s *netlink.Socket, msg *nlmsg.Me
 				return syserr.ErrInvalidArgument
 			}
 		case linux.IFA_ADDRESS:
+		case linux.IFA_BROADCAST:
+			// TODO(b/340929168): support IFA_BROADCAST. The standard
+			// broadcast address (the last IP address of the subnet) is
+			// used by default.
 		default:
 			ctx.Warningf("Unknown attribute: %v", ahdr.Type)
 			return syserr.ErrNotSupported

pkg/sentry/socket/netstack/stack.go

@@ -137,6 +137,7 @@ func (s *Stack) SetInterface(ctx context.Context, msg *nlmsg.Message) *syserr.Er
 		case linux.IFLA_ADDRESS:
 		case linux.IFLA_MTU:
 		case linux.IFLA_NET_NS_FD:
+		case linux.IFLA_TXQLEN:
 		default:
 			ctx.Warningf("unexpected attribute: %x", attr)
 			return syserr.ErrNotSupported
@@ -225,6 +226,8 @@ func (s *Stack) setLink(ctx context.Context, id tcpip.NICID, linkAttrs map[uint1
 			if err := s.Stack.SetNICMTU(id, mtu); err != nil {
 				return syserr.TranslateNetstackError(err)
 			}
+		case linux.IFLA_TXQLEN:
+			// TODO(b/340388892): support IFLA_TXQLEN.
 		}
 	}
 	return nil