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OpenCloudOS-Kernel
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Yuchung Cheng 7c1f08154c tcp: undo initial congestion window on false SYN timeout 
Linux implements RFC6298 and use an initial congestion window of 1
upon establishing the connection if the SYN packet is retransmitted 2
or more times. In cellular networks SYN timeouts are often spurious
if the wireless radio was dormant or idle. Also some network path
is longer than the default SYN timeout. Having a minimal cwnd on
both cases are detrimental to TCP startup performance.

This patch extends TCP undo feature (RFC3522 aka TCP Eifel) to detect
spurious SYN timeout via TCP timestamps. Since tp->retrans_stamp
records the initial SYN timestamp instead of first retransmission, we
have to implement a different undo code additionally. The detection
also must happen before tcp_ack() as retrans_stamp is reset when
SYN is acknowledged.

Note this patch covers both active regular and fast open.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2019-05-01 11:47:54 -04:00
..
6lowpan 6lowpan: Off by one handling ->nexthdr 2019-04-23 19:09:58 +02:00
9p 9p/net: fix memory leak in p9_client_create 2019-03-13 11:50:04 +01:00
802
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8021q netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
appletalk net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
atm net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
ax25 net: ax25: fix misuse of %x 2019-04-21 10:37:26 -07:00
batman-adv genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
bluetooth Bluetooth: Align minimum encryption key size for LE and BR/EDR connections 2019-04-25 06:18:07 -07:00
bpf bpf: Introduce bpf sk local storage 2019-04-27 09:07:04 -07:00
bpfilter bpfilter: re-add header search paths to tools include to fix build error 2019-02-23 13:34:40 -08:00
bridge netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
caif net: caif: avoid using qdisc_qlen() 2019-04-10 12:20:46 -07:00
can netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
ceph libceph: fix breakage caused by multipage bvecs 2019-03-25 22:28:07 +01:00
core devlink: Change devlink health locking mechanism 2019-05-01 11:07:03 -04:00
dcb netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
dccp net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
decnet netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
dns_resolver dns: remove redundant zero length namelen check 2019-04-11 14:01:08 -07:00
dsa net: dsa: Remove legacy probing support 2019-04-30 23:15:35 -04:00
ethernet net: pass net_device argument to the eth_get_headlen 2019-04-23 18:36:34 +02:00
hsr genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
ieee802154 genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
ife
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ipv4 tcp: undo initial congestion window on false SYN timeout 2019-05-01 11:47:54 -04:00
ipv6 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2019-04-30 09:26:13 -04:00
iucv iucv: Remove SKB list assumptions. 2018-11-10 16:55:11 -08:00
kcm kcm: switch order of device registration to fix a crash 2019-04-01 14:59:20 -07:00
key af_key: unconditionally clone on broadcast 2019-02-12 10:36:42 +01:00
l2tp genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
l3mdev l3mdev: add function to retreive upper master 2018-12-03 14:15:26 -08:00
lapb
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llc llc: Check address length before reading address field 2019-04-12 10:25:03 -07:00
mac80211 Various updates, notably: 2019-04-26 16:05:52 -04:00
mac802154
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mpls netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
ncsi genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
netfilter genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
netlabel genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
netlink genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
netrom net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
nfc genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
nsh
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openvswitch genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
packet netlink: make nla_nest_start() add NLA_F_NESTED flag 2019-04-27 17:03:44 -04:00
phonet netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
psample genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
qrtr netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
rds net: rds: exchange of 8K and 1M pool 2019-04-24 12:07:08 -07:00
rfkill rfkill: gpio: Remove unused include 2018-12-18 13:13:56 +01:00
rose Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-04-25 23:52:29 -04:00
rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-04-25 23:52:29 -04:00
sched netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
sctp net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
smc genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
strparser net: strparser: make it explicitly non-modular 2019-04-22 21:50:54 -07:00
sunrpc Fix miscellaneous nfsd bugs, in NFSv4.1 callbacks, NFSv4.1 2019-04-23 13:40:55 -07:00
switchdev switchdev: Remove unused transaction item queue 2019-03-01 21:35:19 -08:00
tipc genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
tls net/tls: byte swap device req TCP seq no upon setting 2019-04-27 16:52:21 -04:00
unix datagram: remove rendundant 'peeked' argument 2019-04-08 09:51:54 -07:00
vmw_vsock vsock/virtio: fix kernel panic from virtio_transport_reset_no_sock 2019-03-08 15:15:44 -08:00
wimax genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
wireless genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
x25 net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
xdp xsk: fix XDP socket ring buffer memory ordering 2019-04-16 20:13:10 -07:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2019-04-30 09:26:13 -04:00
Kconfig net: devlink: select NET_DEVLINK from drivers 2019-03-24 14:55:31 -04:00
Makefile net: split out functions related to registering inflight socket files 2019-02-28 08:24:23 -07:00
compat.c net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
socket.c net: socket: Fix missing break in switch statement 2019-04-26 11:28:47 -04:00
sysctl_net.c
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