1 files changed, 21 insertions, 7 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 44e442bf23f9..70ca4a5e330a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1367,8 +1367,10 @@ static inline bool tcp_checksum_complete(struct sk_buff *skb)
 		__skb_checksum_complete(skb);
 }
 
-bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb);
+bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb,
+		     enum skb_drop_reason *reason);
 
+#ifdef CONFIG_INET
 void __sk_defer_free_flush(struct sock *sk);
 
 static inline void sk_defer_free_flush(struct sock *sk)
@@ -1377,6 +1379,9 @@ static inline void sk_defer_free_flush(struct sock *sk)
 		return;
 	__sk_defer_free_flush(sk);
 }
+#else
+static inline void sk_defer_free_flush(struct sock *sk) {}
+#endif
 
 int tcp_filter(struct sock *sk, struct sk_buff *skb);
 void tcp_set_state(struct sock *sk, int state);
@@ -1670,6 +1675,12 @@ tcp_md5_do_lookup(const struct sock *sk, int l3index,
 	return __tcp_md5_do_lookup(sk, l3index, addr, family);
 }
 
+enum skb_drop_reason
+tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb,
+		     const void *saddr, const void *daddr,
+		     int family, int dif, int sdif);
+
+
 #define tcp_twsk_md5_key(twsk)	((twsk)->tw_md5_key)
 #else
 static inline struct tcp_md5sig_key *
@@ -1678,6 +1689,14 @@ tcp_md5_do_lookup(const struct sock *sk, int l3index,
 {
 	return NULL;
 }
+
+static inline enum skb_drop_reason
+tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb,
+		     const void *saddr, const void *daddr,
+		     int family, int dif, int sdif)
+{
+	return SKB_NOT_DROPPED_YET;
+}
 #define tcp_twsk_md5_key(twsk)	NULL
 #endif
 
@@ -1813,11 +1832,6 @@ static inline struct sk_buff *tcp_rtx_queue_tail(const struct sock *sk)
 	return skb_rb_last(&sk->tcp_rtx_queue);
 }
 
-static inline struct sk_buff *tcp_write_queue_head(const struct sock *sk)
-{
-	return skb_peek(&sk->sk_write_queue);
-}
-
 static inline struct sk_buff *tcp_write_queue_tail(const struct sock *sk)
 {
 	return skb_peek_tail(&sk->sk_write_queue);
@@ -2354,7 +2368,7 @@ static inline u32 tcp_timeout_init(struct sock *sk)
 
 	if (timeout <= 0)
 		timeout = TCP_TIMEOUT_INIT;
-	return timeout;
+	return min_t(int, timeout, TCP_RTO_MAX);
 }
 
 static inline u32 tcp_rwnd_init_bpf(struct sock *sk)