inet: add TCP_NEW_SYN_RECV state

TCP_SYN_RECV state is currently used by fast open sockets.

Initial TCP requests (the pseudo sockets created when a SYN is received)
are not yet associated to a state. They are attached to their parent,
and the parent is in TCP_LISTEN state.

This commit adds TCP_NEW_SYN_RECV state, so that we can convert
TCP stack to a different schem gradually.

This state is not exported to user space.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/net/tcp_states.h b/include/net/tcp_states.h
index b0b645988bd8..50e78a74d0df 100644
--- a/include/net/tcp_states.h
+++ b/include/net/tcp_states.h
@@ -25,6 +25,7 @@ enum {
         TCP_LAST_ACK,
         TCP_LISTEN,
         TCP_CLOSING,    /* Now a valid state */
+        TCP_NEW_SYN_RECV,
 
         TCP_MAX_STATES  /* Leave at the end! */
 };
@@ -44,7 +45,8 @@ enum {
         TCPF_CLOSE_WAIT  = (1 << 8),
         TCPF_LAST_ACK    = (1 << 9),
         TCPF_LISTEN      = (1 << 10),
-        TCPF_CLOSING     = (1 << 11) 
+        TCPF_CLOSING     = (1 << 11),
+        TCPF_NEW_SYN_RECV = (1 << 12),
 };
 
 #endif  /* _LINUX_TCP_STATES_H */