From: Eric W. Biederman <[EMAIL PROTECTED]> - unquoted
I haven't a clue if this interface will meet with widespread approval but
at this point it is simple, and very useful.
Signed-off-by: Eric W. Biederman <[EMAIL PROTECTED]>
---
net/core/net-sysfs.c | 35 +++++++++++++++++++++++++++++++++++
1 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 1be6f94..f8a5c6b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -188,6 +188,40 @@ static ssize_t store_mtu(struct class_device *cd, const
char *buf, size_t len)
return netdev_store(cd, buf, len, change_mtu);
}
+static ssize_t show_new_ns_pid(struct class_device *cd, char *buf)
+{
+ return -EPERM;
+}
+static int change_new_ns_pid(struct net_device *dev, unsigned long new_ns_pid)
+{
+ struct task_struct *tsk;
+ int err;
+ net_t net;
+ /* Look up the network namespace */
+ err = -ESRCH;
+ rcu_read_lock();
+ tsk = find_task_by_pid(new_ns_pid);
+ if (tsk) {
+ task_lock(tsk);
+ if (tsk->nsproxy) {
+ err = 0;
+ net = get_net(tsk->nsproxy->net_ns);
+ }
+ task_unlock(tsk);
+ }
+ rcu_read_unlock();
+ /* If I found a network namespace move the device */
+ if (!err) {
+ err = dev_change_net_namespace(dev, net, NULL);
+ put_net(net);
+ }
+ return err;
+}
+static ssize_t store_new_ns_pid(struct class_device *cd, const char *buf,
size_t len)
+{
+ return netdev_store(cd, buf, len, change_new_ns_pid);
+}
+
NETDEVICE_SHOW(flags, fmt_hex);
static int change_flags(struct net_device *dev, unsigned long new_flags)
@@ -243,6 +277,7 @@ static struct class_device_attribute net_class_attributes[]
= {
__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
store_tx_queue_len),
__ATTR(weight, S_IRUGO | S_IWUSR, show_weight, store_weight),
+ __ATTR(new_ns_pid, S_IWUSR, show_new_ns_pid, store_new_ns_pid),
{}
};
--
1.4.4.1.g278f
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