Sharing one ethernet network device between two L4Linux instances

Hello,

I was able to run two L4linux instances on top of L4 Fiasco OC using a Qemu
emulator of a versatile express-a9 board .

I would like to make these two instances share one ethernet network device.
I would like also to switch between the two L4Linux shell, because in Qemu
only one shell is accessible.

I followed this guide[1] to connect two L4Linux instances using "l4shmnet",
and this thread [2]
to get access to the shell when testing on Qemu.

However, the "l4shmnet" is not working correctly, both L4Linux display this
message:

shmns: Requesting, Shmsize 1024 Kbytes
shmns: Failed to establish communication

Could someone help me building such a working configuration.

Is it possible to share a working Qemu command with the right option for
the network?
This is my Qemu command

$> qemu-system-arm -cpu cortex-a9 -M vexpress-a9 -smp 1 -no-reboot -m 1024M
-kernel bin/arm_armv7a/bootstrap_L4Linux_ARM.elf -nographic -net
nic,model=lan9118 -net user

Is it also possible to share a working lua configuration file?

This is my lua l4lx.cfg file:

-- vim:set ft=lua:

local lxname = "vmlinuz";
if L4.Info.arch() == "arm" then
  lxname = "vmlinuz.arm";
end

local shmns = L4.default_loader:create_namespace({ shm = "placeholder" });

L4.default_loader:start(
  {
    { ldr_flags = L4.Ldr_flags.eager_map },
    caps = {
      log = L4.Env.log:m("rws"),
    },
    l4re_dbg = L4.Dbg.Warn,
    log = { "l4linux", "yellow" },

    shmns = shmns:mode("rw"),
  },
  "rom/" .. lxname .. " earlyprintk=1 showpfexc=1 showghost=1 mem=64M
l4shmnet.add=shmns,macpart=1,create console=ttyLv0 l4x_rd=rom/ramdisk-" ..
L4.Info.arch() .. ".rd root=1:0 ramdisk_size=32768 init=/li\
nuxrc print-fatal-signals=1");

L4.default_loader:start(
  {
    { ldr_flags = L4.Ldr_flags.eager_map },
    caps = {
      log = L4.Env.log:m("rws"),
    },
    l4re_dbg = L4.Dbg.Warn,
    log = { "l4linux2", "green" },

    shmns = shmns:mode("rw"),
  },
  "rom/" .. lxname .. " earlyprintk=1 showpfexc=1 showghost=1 mem=64M
l4shmnet.add=shmns,macpart=2 console=ttyLv0 l4x_rd=rom/ramdisk-" ..
L4.Info.arch() .. ".rd root=1:0 ramdisk_size=32768 init=/linuxrc p\
rint-fatal-signals=1");


Thank you very much in advance.
Best regards,

Mahdi


[1] http://wiki.tudos.org/L4Linux/shmnet
[2] http://os.inf.tu-dresden.de/pipermail/l4-hackers/2013/005775.html

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