linux-2.6-594-new_ns_pid.patch

   1 diff -Nurb linux-2.6.22-593/net/core/net-sysfs.c linux-2.6.22-594/net/core/net-sysfs.c
   2 --- linux-2.6.22-593/net/core/net-sysfs.c       2008-02-29 09:01:43.000000000 -0500
   3 +++ linux-2.6.22-594/net/core/net-sysfs.c       2008-02-29 09:20:20.000000000 -0500
   4 @@ -190,6 +190,41 @@
   5         return netdev_store(device, attr, buf, len, change_mtu);
   6  }
   7
   8 +static ssize_t show_new_ns_pid(struct device *cd, struct device_attribute *attr, char *buf)
   9 +{
  10 +       return -EPERM;
  11 +}
  12 +
  13 +static int change_new_ns_pid(struct net_device *dev, unsigned long new_ns_pid)
  14 +{
  15 +       struct task_struct *tsk;
  16 +       int err;
  17 +       struct net *net=NULL;
  18 +       /* Look up the network namespace */
  19 +       err = -ESRCH;
  20 +       rcu_read_lock();
  21 +       tsk = find_task_by_pid(new_ns_pid);
  22 +       if (tsk) {
  23 +               task_lock(tsk);
  24 +               if (tsk->nsproxy) {
  25 +                       err = 0;
  26 +                       net = get_net(tsk->nsproxy->net_ns);
  27 +               }
  28 +               task_unlock(tsk);
  29 +       }
  30 +       rcu_read_unlock();
  31 +       /* If I found a network namespace move the device */
  32 +       if (!err) {
  33 +               err = dev_change_net_namespace(dev, net, NULL);
  34 +               put_net(net);
  35 +       }
  36 +       return err;
  37 +}
  38 +static ssize_t store_new_ns_pid(struct device *cd, struct device_attribute *attr, const char *buf, size_t len)
  39 +{
  40 +       return netdev_store(cd, attr, buf, len, change_new_ns_pid);
  41 +}
  42 +
  43  NETDEVICE_SHOW(flags, fmt_hex);
  44
  45  static int change_flags(struct net_device *dev, unsigned long new_flags)
  46 @@ -249,6 +284,7 @@
  47         __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
  48                store_tx_queue_len),
  49         __ATTR(weight, S_IRUGO | S_IWUSR, show_weight, store_weight),
  50 +       __ATTR(new_ns_pid, S_IWUSR, show_new_ns_pid, store_new_ns_pid),
  51         {}
  52  };
  53