diff options
| author | Patrick McManus <mcmanus@ducksong.com> | 2008-03-21 16:33:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-03-21 16:33:01 -0700 |
| commit | ec3c0982a2dd1e671bad8e9d26c28dcba0039d87 (patch) | |
| tree | 11a3cd7c530e4225a4c3d4c3f3cc54eb7d2e0e4f /net/ipv4/inet_connection_sock.c | |
| parent | e4c78840284f3f51b1896cf3936d60a6033c4d2c (diff) | |
| download | linux-ec3c0982a2dd1e671bad8e9d26c28dcba0039d87.tar.bz2 | |
[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 'net/ipv4/inet_connection_sock.c')
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index 8a45be988709..cc1a1859a61b 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -414,8 +414,7 @@ void inet_csk_reqsk_queue_prune(struct sock *parent, struct inet_connection_sock *icsk = inet_csk(parent); struct request_sock_queue *queue = &icsk->icsk_accept_queue; struct listen_sock *lopt = queue->listen_opt; - int max_retries = icsk->icsk_syn_retries ? : sysctl_tcp_synack_retries; - int thresh = max_retries; + int thresh = icsk->icsk_syn_retries ? : sysctl_tcp_synack_retries; unsigned long now = jiffies; struct request_sock **reqp, *req; int i, budget; @@ -451,9 +450,6 @@ void inet_csk_reqsk_queue_prune(struct sock *parent, } } - if (queue->rskq_defer_accept) - max_retries = queue->rskq_defer_accept; - budget = 2 * (lopt->nr_table_entries / (timeout / interval)); i = lopt->clock_hand; @@ -461,9 +457,8 @@ void inet_csk_reqsk_queue_prune(struct sock *parent, reqp=&lopt->syn_table[i]; while ((req = *reqp) != NULL) { if (time_after_eq(now, req->expires)) { - if ((req->retrans < (inet_rsk(req)->acked ? max_retries : thresh)) && - (inet_rsk(req)->acked || - !req->rsk_ops->rtx_syn_ack(parent, req))) { + if (req->retrans < thresh && + !req->rsk_ops->rtx_syn_ack(parent, req)) { unsigned long timeo; if (req->retrans++ == 0) |