Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[cascardo/linux.git] / include / net / sock.h

diff --git a/include/net/sock.h b/include/net/sock.h
index ff5be7e..ebf75db 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1020,7 +1020,6 @@ struct proto {
        void                    (*unhash)(struct sock *sk);
        void                    (*rehash)(struct sock *sk);
        int                     (*get_port)(struct sock *sk, unsigned short snum);
-       void                    (*clear_sk)(struct sock *sk, int size);
 
        /* Keeping track of sockets in use */
 #ifdef CONFIG_PROC_FS
@@ -1114,6 +1113,16 @@ static inline bool sk_stream_is_writeable(const struct sock *sk)
               sk_stream_memory_free(sk);
 }
 
+static inline int sk_under_cgroup_hierarchy(struct sock *sk,
+                                           struct cgroup *ancestor)
+{
+#ifdef CONFIG_SOCK_CGROUP_DATA
+       return cgroup_is_descendant(sock_cgroup_ptr(&sk->sk_cgrp_data),
+                                   ancestor);
+#else
+       return -ENOTSUPP;
+#endif
+}
 
 static inline bool sk_has_memory_pressure(const struct sock *sk)
 {
@@ -1232,8 +1241,6 @@ static inline int __sk_prot_rehash(struct sock *sk)
        return sk->sk_prot->hash(sk);
 }
 
-void sk_prot_clear_portaddr_nulls(struct sock *sk, int size);
-
 /* About 10 seconds */
 #define SOCK_DESTROY_TIME (10*HZ)
 
@@ -1332,6 +1339,16 @@ static inline void sk_mem_uncharge(struct sock *sk, int size)
        if (!sk_has_account(sk))
                return;
        sk->sk_forward_alloc += size;
+
+       /* Avoid a possible overflow.
+        * TCP send queues can make this happen, if sk_mem_reclaim()
+        * is not called and more than 2 GBytes are released at once.
+        *
+        * If we reach 2 MBytes, reclaim 1 MBytes right now, there is
+        * no need to hold that much forward allocation anyway.
+        */
+       if (unlikely(sk->sk_forward_alloc >= 1 << 21))
+               __sk_mem_reclaim(sk, 1 << 20);
 }
 
 static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)