1 files changed, 18 insertions, 33 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index f21f0708ec59..7aa78440559a 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -429,7 +429,9 @@ struct sock {
 	void			*sk_security;
 #endif
 	__u32			sk_mark;
+#ifdef CONFIG_CGROUP_NET_CLASSID
 	u32			sk_classid;
+#endif
 	struct cg_proto		*sk_cgrp;
 	void			(*sk_state_change)(struct sock *sk);
 	void			(*sk_data_ready)(struct sock *sk);
@@ -1040,42 +1042,9 @@ struct proto {
 #endif
 };
 
-/*
- * Bits in struct cg_proto.flags
- */
-enum cg_proto_flags {
-	/* Currently active and new sockets should be assigned to cgroups */
-	MEMCG_SOCK_ACTIVE,
-	/* It was ever activated; we must disarm static keys on destruction */
-	MEMCG_SOCK_ACTIVATED,
-};
-
-struct cg_proto {
-	struct page_counter	memory_allocated;	/* Current allocated memory. */
-	struct percpu_counter	sockets_allocated;	/* Current number of sockets. */
-	int			memory_pressure;
-	long			sysctl_mem[3];
-	unsigned long		flags;
-	/*
-	 * memcg field is used to find which memcg we belong directly
-	 * Each memcg struct can hold more than one cg_proto, so container_of
-	 * won't really cut.
-	 *
-	 * The elegant solution would be having an inverse function to
-	 * proto_cgroup in struct proto, but that means polluting the structure
-	 * for everybody, instead of just for memcg users.
-	 */
-	struct mem_cgroup	*memcg;
-};
-
 int proto_register(struct proto *prot, int alloc_slab);
 void proto_unregister(struct proto *prot);
 
-static inline bool memcg_proto_active(struct cg_proto *cg_proto)
-{
-	return test_bit(MEMCG_SOCK_ACTIVE, &cg_proto->flags);
-}
-
 #ifdef SOCK_REFCNT_DEBUG
 static inline void sk_refcnt_debug_inc(struct sock *sk)
 {
@@ -1685,6 +1654,20 @@ static inline void sock_graft(struct sock *sk, struct socket *parent)
 kuid_t sock_i_uid(struct sock *sk);
 unsigned long sock_i_ino(struct sock *sk);
 
+static inline void sk_set_txhash(struct sock *sk)
+{
+	sk->sk_txhash = prandom_u32();
+
+	if (unlikely(!sk->sk_txhash))
+		sk->sk_txhash = 1;
+}
+
+static inline void sk_rethink_txhash(struct sock *sk)
+{
+	if (sk->sk_txhash)
+		sk_set_txhash(sk);
+}
+
 static inline struct dst_entry *
 __sk_dst_get(struct sock *sk)
 {
@@ -1709,6 +1692,8 @@ static inline void dst_negative_advice(struct sock *sk)
 {
 	struct dst_entry *ndst, *dst = __sk_dst_get(sk);
 
+	sk_rethink_txhash(sk);
+
 	if (dst && dst->ops->negative_advice) {
 		ndst = dst->ops->negative_advice(dst);