1 files changed, 51 insertions, 2 deletions

diff --git a/net/core/sock.c b/net/core/sock.c
index c0fc6bdad1e3..664ee4295b6f 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -145,6 +145,55 @@
 static DEFINE_MUTEX(proto_list_mutex);
 static LIST_HEAD(proto_list);
 
+/**
+ * sk_ns_capable - General socket capability test
+ * @sk: Socket to use a capability on or through
+ * @user_ns: The user namespace of the capability to use
+ * @cap: The capability to use
+ *
+ * Test to see if the opener of the socket had when the socket was
+ * created and the current process has the capability @cap in the user
+ * namespace @user_ns.
+ */
+bool sk_ns_capable(const struct sock *sk,
+                   struct user_namespace *user_ns, int cap)
+{
+        return file_ns_capable(sk->sk_socket->file, user_ns, cap) &&
+                ns_capable(user_ns, cap);
+}
+EXPORT_SYMBOL(sk_ns_capable);
+
+/**
+ * sk_capable - Socket global capability test
+ * @sk: Socket to use a capability on or through
+ * @cap: The global capbility to use
+ *
+ * Test to see if the opener of the socket had when the socket was
+ * created and the current process has the capability @cap in all user
+ * namespaces.
+ */
+bool sk_capable(const struct sock *sk, int cap)
+{
+        return sk_ns_capable(sk, &init_user_ns, cap);
+}
+EXPORT_SYMBOL(sk_capable);
+
+/**
+ * sk_net_capable - Network namespace socket capability test
+ * @sk: Socket to use a capability on or through
+ * @cap: The capability to use
+ *
+ * Test to see if the opener of the socket had when the socke was created
+ * and the current process has the capability @cap over the network namespace
+ * the socket is a member of.
+ */
+bool sk_net_capable(const struct sock *sk, int cap)
+{
+        return sk_ns_capable(sk, sock_net(sk)->user_ns, cap);
+}
+EXPORT_SYMBOL(sk_net_capable);
+
+
 #ifdef CONFIG_MEMCG_KMEM
 int mem_cgroup_sockets_init(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
 {
@@ -428,7 +477,7 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
         spin_unlock_irqrestore(&list->lock, flags);
 
         if (!sock_flag(sk, SOCK_DEAD))
-                sk->sk_data_ready(sk, skb_len);
+                sk->sk_data_ready(sk);
         return 0;
 }
 EXPORT_SYMBOL(sock_queue_rcv_skb);
@@ -2196,7 +2245,7 @@ static void sock_def_error_report(struct sock *sk)
         rcu_read_unlock();
 }
 
-static void sock_def_readable(struct sock *sk, int len)
+static void sock_def_readable(struct sock *sk)
 {
         struct socket_wq *wq;