net: ipv4: update fnhe_pmtu when first hop's MTU changes

[mirror_ubuntu-bionic-kernel.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 6da880d2f022c0cfd787a62af2bb7d222348af32..09bcfe8cc27afa3a4ff94356d99b5573634a67c4 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
@@ -342,6 +344,7 @@ ssize_t tcp_splice_read(struct socket *sk, loff_t *ppos,
                        struct pipe_inode_info *pipe, size_t len,
                        unsigned int flags);
 
+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)
 {
@@ -536,6 +539,7 @@ void tcp_send_fin(struct sock *sk);
 void tcp_send_active_reset(struct sock *sk, gfp_t priority);
 int tcp_send_synack(struct sock *);
 void tcp_push_one(struct sock *, unsigned int mss_now);
+void __tcp_send_ack(struct sock *sk, u32 rcv_nxt);
 void tcp_send_ack(struct sock *sk);
 void tcp_send_delayed_ack(struct sock *sk);
 void tcp_send_loss_probe(struct sock *sk);
@@ -827,6 +831,11 @@ struct tcp_skb_cb {
  * as TCP moves IP6CB into a different location in skb->cb[]
  */
 static inline int tcp_v6_iif(const struct sk_buff *skb)
+{
+       return TCP_SKB_CB(skb)->header.h6.iif;
+}
+
+static inline int tcp_v6_iif_l3_slave(const struct sk_buff *skb)
 {
        bool l3_slave = ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags);
 
@@ -901,8 +910,6 @@ enum tcp_ca_event {
        CA_EVENT_LOSS,          /* loss timeout */
        CA_EVENT_ECN_NO_CE,     /* ECT set, but not CE marked */
        CA_EVENT_ECN_IS_CE,     /* received CE marked IP packet */
-       CA_EVENT_DELAYED_ACK,   /* Delayed ack is sent */
-       CA_EVENT_NON_DELAYED_ACK,
 };
 
 /* Information about inbound ACK, passed to cong_ops->in_ack_event() */
@@ -2000,6 +2007,10 @@ int tcp_set_ulp(struct sock *sk, const char *name);
 void tcp_get_available_ulp(char *buf, size_t len);
 void tcp_cleanup_ulp(struct sock *sk);
 
+#define MODULE_ALIAS_TCP_ULP(name)                             \
+       __MODULE_INFO(alias, alias_userspace, name);            \
+       __MODULE_INFO(alias, alias_tcp_ulp, "tcp-ulp-" name)
+
 /* Call BPF_SOCK_OPS program that returns an int. If the return value
  * is < 0, then the BPF op failed (for example if the loaded BPF
  * program does not support the chosen operation or there is no BPF