diff options
Diffstat (limited to 'net/core/net_namespace.c')
| -rw-r--r-- | net/core/net_namespace.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 2178db8e47cd..6a2f41288249 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -501,6 +501,23 @@ static void cleanup_net(struct work_struct *work) net_drop_ns(net); } } + +/** + * net_ns_barrier - wait until concurrent net_cleanup_work is done + * + * cleanup_net runs from work queue and will first remove namespaces + * from the global list, then run net exit functions. + * + * Call this in module exit path to make sure that all netns + * ->exit ops have been invoked before the function is removed. + */ +void net_ns_barrier(void) +{ + mutex_lock(&net_mutex); + mutex_unlock(&net_mutex); +} +EXPORT_SYMBOL(net_ns_barrier); + static DECLARE_WORK(net_cleanup_work, cleanup_net); void __put_net(struct net *net) |
