Merge android-4.4.187 (8eb3d65) into msm-4.4

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index c6a4c41..bafb7e8 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -54,6 +54,8 @@ void tcp_time_wait(struct sock *sk, int state, int timeo);
 
 #define MAX_TCP_HEADER (128 + MAX_HEADER)
 #define MAX_TCP_OPTION_SPACE 40
+#define TCP_MIN_SND_MSS                48
+#define TCP_MIN_GSO_SIZE       (TCP_MIN_SND_MSS - MAX_TCP_OPTION_SPACE)
 
 /*
  * Never offer a window over 32767 without using window scaling. Some
@@ -141,6 +143,9 @@ void tcp_time_wait(struct sock *sk, int state, int timeo);
                                                 * most likely due to retrans in 3WHS.
                                                 */
 
+/* Number of full MSS to receive before Acking RFC2581 */
+#define TCP_DELACK_SEG          1
+
 #define TCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ/2U)) /* Maximal interval between probes
                                                         * for local resources.
                                                         */
@@ -287,6 +292,11 @@ extern int sysctl_tcp_pacing_ca_ratio;
 extern int sysctl_tcp_default_init_rwnd;
 
 extern atomic_long_t tcp_memory_allocated;
+
+/* sysctl variables for controlling various tcp parameters */
+extern int sysctl_tcp_delack_seg;
+extern int sysctl_tcp_use_userconfig;
+
 extern struct percpu_counter tcp_sockets_allocated;
 extern int tcp_memory_pressure;
 
@@ -377,7 +387,14 @@ ssize_t tcp_splice_read(struct socket *sk, loff_t *ppos,
                        struct pipe_inode_info *pipe, size_t len,
                        unsigned int flags);
 
+/* sysctl master controller */
+extern int tcp_use_userconfig_sysctl_handler(struct ctl_table *, int,
+                               void __user *, size_t *, loff_t *);
+extern int tcp_proc_delayed_ack_control(struct ctl_table *, int,
+                               void __user *, size_t *, loff_t *);
+
 void tcp_enter_quickack_mode(struct sock *sk, unsigned int max_quickacks);
+
 static inline void tcp_dec_quickack_mode(struct sock *sk,
                                         const unsigned int pkts)
 {
@@ -1444,6 +1461,11 @@ struct sock *tcp_try_fastopen(struct sock *sk, struct sk_buff *skb,
 void tcp_fastopen_init_key_once(bool publish);
 #define TCP_FASTOPEN_KEY_LENGTH 16
 
+static inline void tcp_init_send_head(struct sock *sk)
+{
+       sk->sk_send_head = NULL;
+}
+
 /* Fastopen key context */
 struct tcp_fastopen_context {
        struct crypto_cipher    *tfm;
@@ -1460,6 +1482,8 @@ static inline void tcp_write_queue_purge(struct sock *sk)
                sk_wmem_free_skb(sk, skb);
        sk_mem_reclaim(sk);
        tcp_clear_all_retrans_hints(tcp_sk(sk));
+       tcp_init_send_head(sk);
+       inet_csk(sk)->icsk_backoff = 0;
 }
 
 static inline struct sk_buff *tcp_write_queue_head(const struct sock *sk)
@@ -1520,11 +1544,6 @@ static inline void tcp_check_send_head(struct sock *sk, struct sk_buff *skb_unli
                tcp_sk(sk)->highest_sack = NULL;
 }
 
-static inline void tcp_init_send_head(struct sock *sk)
-{
-       sk->sk_send_head = NULL;
-}
-
 static inline void __tcp_add_write_queue_tail(struct sock *sk, struct sk_buff *skb)
 {
        __skb_queue_tail(&sk->sk_write_queue, skb);