1 files changed, 34 insertions, 2 deletions

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 5f359dbfcdce..eb125a4c30b3 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -243,6 +243,16 @@ static inline unsigned int tcp_optlen(const struct sk_buff *skb)
         return (tcp_hdr(skb)->doff - 5) * 4;
 }
 
+/* TCP Fast Open */
+#define TCP_FASTOPEN_COOKIE_MIN 4       /* Min Fast Open Cookie size in bytes */
+#define TCP_FASTOPEN_COOKIE_MAX 16      /* Max Fast Open Cookie size in bytes */
+
+/* TCP Fast Open Cookie as stored in memory */
+struct tcp_fastopen_cookie {
+        s8      len;
+        u8      val[TCP_FASTOPEN_COOKIE_MAX];
+};
+
 /* This defines a selective acknowledgement block. */
 struct tcp_sack_block_wire {
         __be32  start_seq;
@@ -339,6 +349,9 @@ struct tcp_sock {
         u32     rcv_tstamp;     /* timestamp of last received ACK (for keepalives) */
         u32     lsndtime;       /* timestamp of last sent data packet (for restart window) */
 
+        struct list_head tsq_node; /* anchor in tsq_tasklet.head list */
+        unsigned long   tsq_flags;
+
         /* Data for direct copy to user */
         struct {
                 struct sk_buff_head     prequeue;
@@ -373,7 +386,9 @@ struct tcp_sock {
                 unused      : 1;
         u8      repair_queue;
         u8      do_early_retrans:1,/* Enable RFC5827 early-retransmit  */
-                early_retrans_delayed:1; /* Delayed ER timer installed */
+                early_retrans_delayed:1, /* Delayed ER timer installed */
+                syn_data:1,     /* SYN includes data */
+                syn_fastopen:1; /* SYN includes Fast Open option */
 
 /* RTT measurement */
         u32     srtt;           /* smoothed round trip time << 3        */
@@ -478,6 +493,9 @@ struct tcp_sock {
                 u32               probe_seq_start;
                 u32               probe_seq_end;
         } mtu_probe;
+        u32     mtu_info; /* We received an ICMP_FRAG_NEEDED / ICMPV6_PKT_TOOBIG
+                           * while socket was owned by user.
+                           */
 
 #ifdef CONFIG_TCP_MD5SIG
 /* TCP AF-Specific parts; only used by MD5 Signature support so far */
@@ -487,6 +505,9 @@ struct tcp_sock {
         struct tcp_md5sig_info  __rcu *md5sig_info;
 #endif
 
+/* TCP fastopen related information */
+        struct tcp_fastopen_request *fastopen_req;
+
         /* When the cookie options are generated and exchanged, then this
          * object holds a reference to them (cookie_values->kref).  Also
          * contains related tcp_cookie_transactions fields.
@@ -494,6 +515,17 @@ struct tcp_sock {
         struct tcp_cookie_values  *cookie_values;
 };
 
+enum tsq_flags {
+        TSQ_THROTTLED,
+        TSQ_QUEUED,
+        TCP_TSQ_DEFERRED,          /* tcp_tasklet_func() found socket was owned */
+        TCP_WRITE_TIMER_DEFERRED,  /* tcp_write_timer() found socket was owned */
+        TCP_DELACK_TIMER_DEFERRED, /* tcp_delack_timer() found socket was owned */
+        TCP_MTU_REDUCED_DEFERRED,  /* tcp_v{4|6}_err() could not call
+                                    * tcp_v{4|6}_mtu_reduced()
+                                    */
+};
+
 static inline struct tcp_sock *tcp_sk(const struct sock *sk)
 {
         return (struct tcp_sock *)sk;
@@ -507,7 +539,7 @@ struct tcp_timewait_sock {
         u32                       tw_ts_recent;
         long                      tw_ts_recent_stamp;
 #ifdef CONFIG_TCP_MD5SIG
-        struct tcp_md5sig_key   *tw_md5_key;
+        struct tcp_md5sig_key     *tw_md5_key;
 #endif
         /* Few sockets in timewait have cookies; in that case, then this
          * object holds a reference to them (tw_cookie_values->kref).