linux-2.6-594-new_ns_pid.patch

   1 diff -Nurb linux-2.6.22-592/net/core/net-sysfs.c linux-2.6.22-594/net/core/net-sysfs.c
   2 --- linux-2.6.22-592/net/core/net-sysfs.c       2008-02-29 08:45:15.000000000 -0500
   3 +++ linux-2.6.22-594/net/core/net-sysfs.c       2008-02-29 08:55:47.000000000 -0500
   4 @@ -190,6 +190,40 @@
   5         return netdev_store(device, attr, buf, len, change_mtu);
   6  }
   7
   8 +static ssize_t show_new_ns_pid(struct class_device *cd, char *buf)
   9 +{
  10 +       return -EPERM;
  11 +}
  12 +static int change_new_ns_pid(struct net_device *dev, unsigned long new_ns_pid)
  13 +{
  14 +       struct task_struct *tsk;
  15 +       int err;
  16 +       struct net *net;
  17 +       /* Look up the network namespace */
  18 +       err = -ESRCH;
  19 +       rcu_read_lock();
  20 +       tsk = find_task_by_real_pid(new_ns_pid);
  21 +       if (tsk) {
  22 +               task_lock(tsk);
  23 +               if (tsk->nsproxy) {
  24 +                       err = 0;
  25 +                       net = get_net(tsk->nsproxy->net_ns);
  26 +               }
  27 +               task_unlock(tsk);
  28 +       }
  29 +       rcu_read_unlock();
  30 +       /* If I found a network namespace move the device */
  31 +       if (!err) {
  32 +               err = dev_change_net_namespace(dev, net, NULL);
  33 +               put_net(net);
  34 +       }
  35 +       return err;
  36 +}
  37 +static ssize_t store_new_ns_pid(struct class_device *cd, const char *buf, size_t len)
  38 +{
  39 +       return netdev_store(cd, buf, len, change_new_ns_pid);
  40 +}
  41 +
  42  NETDEVICE_SHOW(flags, fmt_hex);
  43
  44  static int change_flags(struct net_device *dev, unsigned long new_flags)
  45 @@ -249,6 +283,7 @@
  46         __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
  47                store_tx_queue_len),
  48         __ATTR(weight, S_IRUGO | S_IWUSR, show_weight, store_weight),
  49 +       __ATTR(new_ns_pid, S_IWUSR, show_new_ns_pid, store_new_ns_pid),
  50         {}
  51  };
  52