net: Detect drivers that reschedule NAPI and exhaust budget

[firefly-linux-kernel-4.4.55.git] / net / core / net_namespace.c

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 7f155175bba83a0c8083008ece1a56e265174984..ce780c722e48ca2bf35534895ef0b7dc0a9541d5 100644 (file)
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -337,17 +337,17 @@ EXPORT_SYMBOL_GPL(__put_net);
 
 struct net *get_net_ns_by_fd(int fd)
 {
-       struct proc_ns *ei;
        struct file *file;
+       struct ns_common *ns;
        struct net *net;
 
        file = proc_ns_fget(fd);
        if (IS_ERR(file))
                return ERR_CAST(file);
 
-       ei = get_proc_ns(file_inode(file));
-       if (ei->ns_ops == &netns_operations)
-               net = get_net(ei->ns);
+       ns = get_proc_ns(file_inode(file));
+       if (ns->ops == &netns_operations)
+               net = get_net(container_of(ns, struct net, ns));
        else
                net = ERR_PTR(-EINVAL);
 
@@ -386,12 +386,15 @@ EXPORT_SYMBOL_GPL(get_net_ns_by_pid);
 
 static __net_init int net_ns_net_init(struct net *net)
 {
-       return proc_alloc_inum(&net->proc_inum);
+#ifdef CONFIG_NET_NS
+       net->ns.ops = &netns_operations;
+#endif
+       return ns_alloc_inum(&net->ns);
 }
 
 static __net_exit void net_ns_net_exit(struct net *net)
 {
-       proc_free_inum(net->proc_inum);
+       ns_free_inum(&net->ns);
 }
 
 static struct pernet_operations __net_initdata net_ns_ops = {
@@ -629,7 +632,7 @@ void unregister_pernet_device(struct pernet_operations *ops)
 EXPORT_SYMBOL_GPL(unregister_pernet_device);
 
 #ifdef CONFIG_NET_NS
-static void *netns_get(struct task_struct *task)
+static struct ns_common *netns_get(struct task_struct *task)
 {
        struct net *net = NULL;
        struct nsproxy *nsproxy;
@@ -640,17 +643,22 @@ static void *netns_get(struct task_struct *task)
                net = get_net(nsproxy->net_ns);
        task_unlock(task);
 
-       return net;
+       return net ? &net->ns : NULL;
 }
 
-static void netns_put(void *ns)
+static inline struct net *to_net_ns(struct ns_common *ns)
 {
-       put_net(ns);
+       return container_of(ns, struct net, ns);
 }
 
-static int netns_install(struct nsproxy *nsproxy, void *ns)
+static void netns_put(struct ns_common *ns)
 {
-       struct net *net = ns;
+       put_net(to_net_ns(ns));
+}
+
+static int netns_install(struct nsproxy *nsproxy, struct ns_common *ns)
+{
+       struct net *net = to_net_ns(ns);
 
        if (!ns_capable(net->user_ns, CAP_SYS_ADMIN) ||
            !ns_capable(current_user_ns(), CAP_SYS_ADMIN))
@@ -661,18 +669,11 @@ static int netns_install(struct nsproxy *nsproxy, void *ns)
        return 0;
 }
 
-static unsigned int netns_inum(void *ns)
-{
-       struct net *net = ns;
-       return net->proc_inum;
-}
-
 const struct proc_ns_operations netns_operations = {
        .name           = "net",
        .type           = CLONE_NEWNET,
        .get            = netns_get,
        .put            = netns_put,
        .install        = netns_install,
-       .inum           = netns_inum,
 };
 #endif