Eric Dumazet
7c85af8810
tcp: avoid reorders for TFO passive connections ...
We found that a TCP Fast Open passive connection was vulnerable
to reorders, as the exchange might look like
[1] C -> S S <FO ...> <request>
[2] S -> C S. ack request <options>
[3] S -> C . <answer>
packets [2] and [3] can be generated at almost the same time.
If C receives the 3rd packet before the 2nd, it will drop it as
the socket is in SYN_SENT state and expects a SYNACK.
S will have to retransmit the answer.
Current OOO avoidance in linux is defeated because SYNACK
packets are attached to the LISTEN socket, while DATA packets
are attached to the children. They might be sent by different cpus,
and different TX queues might be selected.
It turns out that for TFO, we created a child, which is a
full blown socket in TCP_SYN_RECV state, and we simply can attach
the SYNACK packet to this socket.
This means that at the time tcp_sendmsg() pushes DATA packet,
skb->ooo_okay will be set iff the SYNACK packet had been sent
and TX completed.
This removes the reorder source at the host level.
We also removed the export of tcp_try_fastopen(), as it is no
longer called from IPv6.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-28 22:11:19 -07:00
ieee820154: 6lowpan: dispatch evaluation rework
2015-09-17 13:20:03 +02:00
net/9p: Remove ib_get_dma_mr calls
2015-08-30 18:12:36 -04:00
net: 8021q: convert to using IFF_NO_QUEUE
2015-08-18 11:55:06 -07:00
atm: deal with setting entry before mkip was called
2015-09-17 22:13:32 -07:00
batman-adv: turn batadv_neigh_node_get() into local function
2015-08-27 20:15:34 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
bridge: Allow forward delay to be cfgd when STP enabled
2015-09-27 19:09:38 -07:00
net: caif: convert to using IFF_NO_QUEUE
2015-08-18 11:55:07 -07:00
libceph: don't access invalid memory in keepalive2 path
2015-09-17 20:14:15 +03:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
netfilter: Pass priv instead of nf_hook_ops to netfilter hooks
2015-09-18 22:00:16 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
flow_dissector: Add flags argument to skb_flow_dissector functions
2015-09-01 15:06:22 -07:00
net: hsr: convert to using IFF_NO_QUEUE
2015-08-18 11:55:07 -07:00
ieee802154: 6lowpan: use correct ESC value for dispatch
2015-09-17 13:20:04 +02:00
tcp: avoid reorders for TFO passive connections
2015-09-28 22:11:19 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
s390/iucv: do not use arrays as argument
2015-09-21 16:03:04 -07:00
net: Fix RCU splat in af_key
2015-08-24 14:48:10 -07:00
l2tp: auto load IP modules
2015-09-25 12:27:22 -07:00
tcp: fix recv with flags MSG_WAITALL | MSG_PEEK
2015-07-27 01:06:53 -07:00
mac80211: reset CQM history upon reconfiguration
2015-09-22 15:22:50 +02:00
ieee802154: add ack request default handling
2015-08-10 20:43:06 +02:00
mpls: fix mpls_net_init memory leak
2015-08-31 12:45:09 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
nfc: netlink: Add capability to reply to vendor_cmd with data
2015-08-20 22:00:11 +02:00
vxlan: support both IPv4 and IPv6 sockets in a single vxlan device
2015-09-26 22:40:55 -07:00
Fix AF_PACKET ABI breakage in 4.2
2015-09-23 14:33:55 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-10 13:53:15 -07:00
rfkill: Copy "all" global state to other types
2015-09-04 14:26:56 +02:00
rxrpc: Replace get_seconds with ktime_get_seconds
2015-09-20 21:53:56 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-09-26 16:08:27 -07:00
sctp: fix race on protocol/netns initialization
2015-09-11 15:00:02 -07:00
NFS client bugfixes for Linux 4.3
2015-09-25 11:33:52 -07:00
switchdev: reduce transaction phase enum down to a boolean
2015-09-24 22:59:22 -07:00
tipc: reinitialize pointer after skb linearize
2015-09-20 22:31:20 -07:00
net:wimax: Fix doucble word "the the" in networking.xml
2015-08-09 22:43:52 -07:00
cfg80211: regulatory: restore proper user alpha2
2015-09-04 14:29:25 +02:00
inet: constify ip_route_output_flow() socket argument
2015-09-25 13:00:37 -07:00
7c85af8810