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authorPatrick McManus <mcmanus@ducksong.com>2008-03-21 16:33:01 -0700
committerDavid S. Miller <davem@davemloft.net>2008-03-21 16:33:01 -0700
commitec3c0982a2dd1e671bad8e9d26c28dcba0039d87 (patch)
tree11a3cd7c530e4225a4c3d4c3f3cc54eb7d2e0e4f /include
parente4c78840284f3f51b1896cf3936d60a6033c4d2c (diff)
[TCP]: TCP_DEFER_ACCEPT updates - process as established
Change TCP_DEFER_ACCEPT implementation so that it transitions a connection to ESTABLISHED after handshake is complete instead of leaving it in SYN-RECV until some data arrvies. Place connection in accept queue when first data packet arrives from slow path. Benefits: - established connection is now reset if it never makes it to the accept queue - diagnostic state of established matches with the packet traces showing completed handshake - TCP_DEFER_ACCEPT timeouts are expressed in seconds and can now be enforced with reasonable accuracy instead of rounding up to next exponential back-off of syn-ack retry. Signed-off-by: Patrick McManus <mcmanus@ducksong.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/tcp.h7
-rw-r--r--include/net/request_sock.h4
-rw-r--r--include/net/tcp.h1
3 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 08027f1d7f3..d96d9b12230 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -239,6 +239,11 @@ static inline struct tcp_request_sock *tcp_rsk(const struct request_sock *req)
return (struct tcp_request_sock *)req;
}
+struct tcp_deferred_accept_info {
+ struct sock *listen_sk;
+ struct request_sock *request;
+};
+
struct tcp_sock {
/* inet_connection_sock has to be the first member of tcp_sock */
struct inet_connection_sock inet_conn;
@@ -374,6 +379,8 @@ struct tcp_sock {
unsigned int keepalive_intvl; /* time interval between keep alive probes */
int linger2;
+ struct tcp_deferred_accept_info defer_tcp_accept;
+
unsigned long last_synq_overflow;
u32 tso_deferred;
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 040780add35..0369f98e9f3 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -115,8 +115,8 @@ struct request_sock_queue {
struct request_sock *rskq_accept_head;
struct request_sock *rskq_accept_tail;
rwlock_t syn_wait_lock;
- u8 rskq_defer_accept;
- /* 3 bytes hole, try to pack */
+ u16 rskq_defer_accept;
+ /* 2 bytes hole, try to pack */
struct listen_sock *listen_opt;
};
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 847e1634e1f..67cc3956d29 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -139,6 +139,7 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
#define MAX_TCP_KEEPINTVL 32767
#define MAX_TCP_KEEPCNT 127
#define MAX_TCP_SYNCNT 127
+#define MAX_TCP_ACCEPT_DEFERRED 65535
#define TCP_SYNQ_INTERVAL (HZ/5) /* Period of SYNACK timer */