#include <linux/idr.h>
#include <linux/rculist.h>
#include <linux/nsproxy.h>
-#include <linux/netdevice.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
-#include <net/rtnetlink.h>
/*
* Our network namespace constructor/destructor lists
#define INITIAL_NET_GEN_PTRS 13 /* +1 for len +2 for rcu_head */
-static void unregister_netdevices(struct net *net, struct list_head *list)
-{
- struct net_device *dev;
- /* At exit all network devices most be removed from a network
- * namespace. Do this in the reverse order of registeration.
- */
- for_each_netdev_reverse(net, dev) {
- if (dev->rtnl_link_ops)
- dev->rtnl_link_ops->dellink(dev, list);
- else
- unregister_netdevice_queue(dev, list);
- }
-}
-
static int ops_init(const struct pernet_operations *ops, struct net *net)
{
int err;
list_for_each_entry(net, net_exit_list, exit_list)
ops->exit(net);
}
- if (&ops->list == first_device) {
- LIST_HEAD(dev_kill_list);
- rtnl_lock();
- list_for_each_entry(net, net_exit_list, exit_list)
- unregister_netdevices(net, &dev_kill_list);
- unregister_netdevice_many(&dev_kill_list);
- rtnl_unlock();
- }
if (ops->exit_batch)
ops->exit_batch(net_exit_list);
}
}
}
error = __register_pernet_operations(list, ops);
- if (error && ops->id)
- ida_remove(&net_generic_ids, *ops->id);
+ if (error) {
+ rcu_barrier();
+ if (ops->id)
+ ida_remove(&net_generic_ids, *ops->id);
+ }
return error;
}
{
__unregister_pernet_operations(ops);
+ rcu_barrier();
if (ops->id)
ida_remove(&net_generic_ids, *ops->id);
}