Julian Anastasov d1b99ba41d tcp: accept socket after TCP_DEFER_ACCEPT period ... Willy Tarreau and many other folks in recent years were concerned what happens when the TCP_DEFER_ACCEPT period expires for clients which sent ACK packet. They prefer clients that actively resend ACK on our SYN-ACK retransmissions to be converted from open requests to sockets and queued to the listener for accepting after the deferring period is finished. Then application server can decide to wait longer for data or to properly terminate the connection with FIN if read() returns EAGAIN which is an indication for accepting after the deferring period. This change still can have side effects for applications that expect always to see data on the accepted socket. Others can be prepared to work in both modes (with or without TCP_DEFER_ACCEPT period) and their data processing can ignore the read=EAGAIN notification and to allocate resources for clients which proved to have no data to send during the deferring period. OTOH, servers that use TCP_DEFER_ACCEPT=1 as flag (not as a timeout) to wait for data will notice clients that didn't send data for 3 seconds but that still resend ACKs. Thanks to Willy Tarreau for the initial idea and to Eric Dumazet for the review and testing the change. Signed-off-by: Julian Anastasov <ja@ssi.bg> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2009-10-19 19:19:01 -07:00
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netfilter	netfilter: nfnetlink: constify message attributes and headers	2009-08-25 16:07:58 +02:00
af_inet.c	net: Use sk_mark for routing lookup in more places	2009-10-01 15:16:49 -07:00
ah4.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
arp.c	net: make neigh_ops constant	2009-09-01 17:40:57 -07:00
cipso_ipv4.c	netlabel: Label incoming TCP connections correctly in SELinux	2009-03-28 15:01:36 +11:00
datagram.c	mib: add net to IP_INC_STATS_BH	2008-07-16 20:20:11 -07:00
devinet.c	ipv4: arp_notify address list bug	2009-10-07 03:18:17 -07:00
esp4.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
fib_frontend.c	ipv4: cleanup: remove unnecessary include.	2009-05-18 15:16:38 -07:00
fib_hash.c	ipv4: cleanup - remove two unused parameters from fib_semantic_match().	2009-05-18 15:16:37 -07:00
fib_lookup.h	ipv4: cleanup - remove two unused parameters from fib_semantic_match().	2009-05-18 15:16:37 -07:00
fib_rules.c	net: Remove unused parameter from fill method in fib_rules_ops.	2009-05-20 17:26:23 -07:00
fib_semantics.c	ipv4: cleanup - remove two unused parameters from fib_semantic_match().	2009-05-18 15:16:37 -07:00
fib_trie.c	fib_trie: resize rework	2009-08-28 23:57:15 -07:00
icmp.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
igmp.c	bonding: remap muticast addresses without using dev_close() and dev_open()	2009-09-15 02:37:40 -07:00
inet_connection_sock.c	net: Make setsockopt() optlen be unsigned.	2009-09-30 16:12:20 -07:00
inet_diag.c	net: correct off-by-one write allocations reports	2009-06-18 00:29:12 -07:00
inet_fragment.c	inet fragments: fix sparse warning: context imbalance	2009-02-26 23:13:35 -08:00
inet_hashtables.c	net: move bsockets outside of read only beginning of struct inet_hashinfo	2009-02-01 12:31:33 -08:00
inet_lro.c	include/net net/ - csum_partial - remove unnecessary casts	2008-11-19 15:44:53 -08:00
inet_timewait_sock.c	tcp: fix premature termination of FIN_WAIT2 time-wait sockets	2009-08-29 00:00:35 -07:00
inetpeer.c	net: clean up net/ipv4/ah4.c esp4.c fib_semantics.c inet_connection_sock.c inetpeer.c ip_output.c	2008-11-03 00:23:42 -08:00
ip_forward.c	net: skb->dst accessors	2009-06-03 02:51:04 -07:00
ip_fragment.c	ipv4: Use frag list abstraction interfaces.	2009-06-09 00:19:37 -07:00
ip_gre.c	tunnel: eliminate recursion field	2009-09-24 15:39:22 -07:00
ip_input.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
ip_options.c	net: skb->dst accessors	2009-06-03 02:51:04 -07:00
ip_output.c	net: Use sk_mark for routing lookup in more places	2009-10-01 15:16:49 -07:00
ip_sockglue.c	net: Make setsockopt() optlen be unsigned.	2009-09-30 16:12:20 -07:00
ipcomp.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
ipconfig.c	ipv4: teach ipconfig about the MTU option in DHCP	2009-05-19 15:36:17 -07:00
ipip.c	tunnel: eliminate recursion field	2009-09-24 15:39:22 -07:00
ipmr.c	net: Make setsockopt() optlen be unsigned.	2009-09-30 16:12:20 -07:00
Kconfig	ipv4: update ARPD help text	2009-06-13 23:36:32 -07:00
Makefile	IPVS: Move IPVS to net/netfilter/ipvs	2008-10-07 08:38:24 +11:00
netfilter.c	net: skb->dst accessors	2009-06-03 02:51:04 -07:00
proc.c	snmp: add missing counters for RFC 4293	2009-04-27 02:45:02 -07:00
protocol.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
raw.c	net: Make setsockopt() optlen be unsigned.	2009-09-30 16:12:20 -07:00
route.c	sysctl: remove "struct file *" argument of ->proc_handler	2009-09-24 07:21:04 -07:00
syncookies.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
sysctl_net_ipv4.c	sysctl: remove "struct file *" argument of ->proc_handler	2009-09-24 07:21:04 -07:00
tcp_bic.c	tcp: add helper for AI algorithm	2009-03-02 03:00:15 -08:00
tcp_cong.c	Networking: use CAP_NET_ADMIN when deciding to call request_module	2009-08-14 11:18:34 +10:00
tcp_cubic.c	tcp: add helper for AI algorithm	2009-03-02 03:00:15 -08:00
tcp_diag.c	net: inet_diag_handler structs can be const	2008-11-19 15:43:27 -08:00
tcp_highspeed.c	[TCP]: Cong.ctrl modules: remove unused good_ack from cong_avoid	2008-01-28 14:55:41 -08:00
tcp_htcp.c	htcp: merge icsk_ca_state compare	2009-03-02 03:00:14 -08:00
tcp_hybla.c	tcp: Fix tcp_hybla zero congestion window growth with small rho and large cwnd.	2008-10-07 15:58:17 -07:00
tcp_illinois.c	[TCP]: Cong.ctrl modules: remove unused good_ack from cong_avoid	2008-01-28 14:55:41 -08:00
tcp_input.c	tcp: fix ssthresh u16 leftover	2009-09-15 01:30:10 -07:00
tcp_ipv4.c	tcp: fix ssthresh u16 leftover	2009-09-15 01:30:10 -07:00
tcp_lp.c	[TCP]: Cong.ctrl modules: remove unused good_ack from cong_avoid	2008-01-28 14:55:41 -08:00
tcp_minisocks.c	tcp: accept socket after TCP_DEFER_ACCEPT period	2009-10-19 19:19:01 -07:00
tcp_output.c	IPv4 TCP fails to send window scale option when window scale is zero	2009-10-01 15:14:51 -07:00
tcp_probe.c	tcp: '< 0' test on unsigned	2009-03-13 16:05:14 -07:00
tcp_scalable.c	tcp: add helper for AI algorithm	2009-03-02 03:00:15 -08:00
tcp_timer.c	Revert Backoff [v3]: Calculate TCP's connection close threshold as a time value.	2009-09-01 02:45:47 -07:00
tcp_vegas.c	tcp: tcp_vegas ssthresh bugfix	2009-05-25 22:44:59 -07:00
tcp_vegas.h	[TCP]: congestion control API pass RTT in microseconds	2007-07-31 02:27:57 -07:00
tcp_veno.c	tcp: add helper for AI algorithm	2009-03-02 03:00:15 -08:00
tcp_westwood.c	[TCP]: congestion control API pass RTT in microseconds	2007-07-31 02:27:57 -07:00
tcp_yeah.c	tcp: add helper for AI algorithm	2009-03-02 03:00:15 -08:00
tcp.c	net: splice() from tcp to pipe should take into account O_NONBLOCK	2009-10-02 09:46:05 -07:00
tunnel4.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
udp_impl.h	net: Make setsockopt() optlen be unsigned.	2009-09-30 16:12:20 -07:00
udp.c	udp: Fix udp_poll() and ioctl()	2009-10-13 03:16:54 -07:00
udplite.c	net: constify struct net_protocol	2009-09-14 17:03:01 -07:00
xfrm4_input.c	net: skb->dst accessors	2009-06-03 02:51:04 -07:00
xfrm4_mode_beet.c	ipsec: Interfamily IPSec BEET	2008-08-06 02:39:30 -07:00
xfrm4_mode_transport.c	[IPSEC]: Use IPv6 calling convention as the convention for x->mode->output	2007-10-10 16:55:54 -07:00
xfrm4_mode_tunnel.c	net: skb->dst accessors	2009-06-03 02:51:04 -07:00
xfrm4_output.c	net: skb->dst accessors	2009-06-03 02:51:04 -07:00
xfrm4_policy.c	xfrm4: fix build when SYSCTLs are disabled	2009-08-04 20:18:33 -07:00
xfrm4_state.c	xfrm: remove useless forward declarations	2008-11-25 01:05:54 -08:00
xfrm4_tunnel.c	[IPCOMP]: Fix reception of incompressible packets	2008-01-31 19:27:24 -08:00