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linux-stable/include/net
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Willy Tarreau 3979ad7e82 net/tcp-fastopen: make connect()'s return case more consistent with non-TFO 
Without TFO, any subsequent connect() call after a successful one returns
-1 EISCONN. The last API update ensured that __inet_stream_connect() can
return -1 EINPROGRESS in response to sendmsg() when TFO is in use to
indicate that the connection is now in progress. Unfortunately since this
function is used both for connect() and sendmsg(), it has the undesired
side effect of making connect() now return -1 EINPROGRESS as well after
a successful call, while at the same time poll() returns POLLOUT. This
can confuse some applications which happen to call connect() and to
check for -1 EISCONN to ensure the connection is usable, and for which
EINPROGRESS indicates a need to poll, causing a loop.

This problem was encountered in haproxy where a call to connect() is
precisely used in certain cases to confirm a connection's readiness.
While arguably haproxy's behaviour should be improved here, it seems
important to aim at a more robust behaviour when the goal of the new
API is to make it easier to implement TFO in existing applications.

This patch simply ensures that we preserve the same semantics as in
the non-TFO case on the connect() syscall when using TFO, while still
returning -1 EINPROGRESS on sendmsg(). For this we simply tell
__inet_stream_connect() whether we're doing a regular connect() or in
fact connecting for a sendmsg() call.

Cc: Wei Wang <weiwan@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:12:21 -05:00
..
9p
bluetooth Bluetooth: __ variants of u8 and friends are not neccessary inside kernel 2016-11-27 07:41:05 +01:00
caif
irda
iucv s390/iucv: do not use arrays as argument 2015-09-21 16:03:04 -07:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-12-07 19:16:46 -05:00
netns Introduce a sysctl that modifies the value of PROT_SOCK. 2017-01-24 12:10:51 -05:00
nfc NFC: digital: Add support for NFC DEP Response Waiting Time 2016-07-11 02:01:14 +02:00
phonet sock: struct proto hash function may error 2016-02-11 03:54:14 -05:00
sctp sctp: implement sender-side procedures for SSN Reset Request Parameter 2017-01-18 14:55:11 -05:00
tc_act net/sched: Introduce sample tc action 2017-01-24 13:44:28 -05:00
6lowpan.h 6lowpan: add 802.15.4 short addr slaac 2016-06-15 20:41:22 -07:00
act_api.h net sched actions: Add support for user cookies 2017-01-25 12:37:04 -05:00
addrconf.h inet: collapse ipv4/v6 rcv_saddr_equal functions into one 2017-01-18 13:04:28 -05:00
af_ieee802154.h ieee802154: af_ieee802154: fix typo in comment. 2015-09-17 13:20:05 +02:00
af_rxrpc.h rxrpc: Rewrite the data and ack handling code 2016-09-08 11:10:12 +01:00
af_unix.h af_unix: split 'u->readlock' into two: 'iolock' and 'bindlock' 2016-09-04 13:29:29 -07:00
af_vsock.h VSOCK: Introduce virtio_vsock_common.ko 2016-08-02 02:57:29 +03:00
ah.h
arp.h
atmclip.h
ax25.h
ax88796.h
bond_3ad.h bonding: 3ad: apply ad_actor settings changes immediately 2016-02-09 04:45:49 -05:00
bond_alb.h
bond_options.h bonding: convert num_grat_arp to the new bonding option API 2015-07-27 01:05:24 -07:00
bonding.h netns: make struct pernet_operations::id unsigned int 2016-11-18 10:59:15 -05:00
busy_poll.h udp: enable busy polling for all sockets 2016-11-18 10:44:31 -05:00
calipso.h calipso: Add a label cache. 2016-06-27 15:06:17 -04:00
cfg80211-wext.h
cfg80211.h cfg80211: Fix documentation for connect result 2017-01-13 09:47:08 +01:00
cfg802154.h ieee802154: add netns support 2016-07-08 12:20:57 +02:00
checksum.h csum: eliminate sparse warning in remcsum_unadjust() 2017-01-20 12:12:13 -05:00
cipso_ipv4.h
cls_cgroup.h cls_cgroup: get sk_classid only from full sockets 2016-04-19 20:09:25 -04:00
codel.h codel: split into multiple files 2016-04-25 16:44:27 -04:00
codel_impl.h codel: split into multiple files 2016-04-25 16:44:27 -04:00
codel_qdisc.h net_sched: fq_codel: cache skb->truesize into skb->cb 2016-06-25 12:19:35 -04:00
compat.h packet: compat support for sock_fprog 2016-06-09 23:41:03 -07:00
datalink.h
dcbevent.h
dcbnl.h
devlink.h devlink: Add E-Switch inline mode control 2016-11-24 16:01:14 -05:00
dn.h
dn_dev.h
dn_fib.h
dn_neigh.h netfilter: Pass net into okfn 2015-09-17 17:18:37 -07:00
dn_nsp.h
dn_route.h
dsa.h net: dsa: Remove hwmon support 2017-01-20 14:42:51 -05:00
dsfield.h
dst.h route: move lwtunnel state to a single place 2016-04-25 16:20:09 -04:00
dst_cache.h net: add dst_cache support 2016-02-16 20:21:48 -05:00
dst_metadata.h net/dst: Add dst port to dst_metadata utility functions 2016-11-09 13:41:54 -05:00
dst_ops.h net: remove bh disabling around percpu_counter accesses 2017-01-20 11:27:22 -05:00
esp.h
ethoc.h net/ethoc: support big-endian register layout 2015-09-23 15:33:15 -07:00
fib_rules.h net: core: add UID to flows, rules, and routes 2016-11-04 14:45:23 -04:00
firewire.h
flow.h Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-12 19:25:04 -08:00
flow_dissector.h flow disector: ARP support 2017-01-11 11:02:47 -05:00
flowcache.h net/flowcache: Convert to hotplug state machine 2016-11-09 23:45:28 +01:00
fou.h fou: Add encap ops for IPv6 tunnels 2016-05-20 18:03:16 -04:00
fq.h fq.h: Port memory limit mechanism from fq_codel 2016-09-30 13:29:21 +02:00
fq_impl.h fq.h: Port memory limit mechanism from fq_codel 2016-09-30 13:29:21 +02:00
garp.h
gen_stats.h net_sched: gen_estimator: complete rewrite of rate estimators 2016-12-05 15:21:59 -05:00
genetlink.h genetlink: Make family a signed integer. 2016-11-13 12:14:59 -05:00
geneve.h net: Remove deprecated tunnel specific UDP offload functions 2016-06-17 20:23:32 -07:00
gre.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-08-18 01:17:32 -04:00
gro_cells.h gro_cells: mark napi struct as not busy poll candidates 2016-11-15 22:27:27 -05:00
gtp.h gtp: #define #define _GTP_H_ and not #define _GTP_H 2016-07-25 17:55:43 -07:00
gue.h
hwbm.h net: add a hardware buffer management helper API 2016-03-14 12:19:46 -04:00
icmp.h net: snmp: kill STATS_BH macros 2016-04-27 22:48:25 -04:00
ieee80211_radiotap.h wireless: radiotap: fix timestamp sampling position values 2016-10-19 12:11:36 +02:00
ieee802154_netdev.h mac802154: constify ieee802154_llsec_ops structure 2016-01-04 20:40:41 +01:00
if_inet6.h ipv6 addrconf: Implemented enhanced DAD (RFC7527) 2016-12-03 23:21:37 -05:00
ila.h ila: Add generic ILA translation facility 2015-12-15 23:25:20 -05:00
inet6_connection_sock.h inet: drop ->bind_conflict 2017-01-18 13:04:28 -05:00
inet6_hashtables.h tcp/dccp: do not touch listener sk_refcnt under synflood 2016-04-04 22:11:20 -04:00
inet_common.h net/tcp-fastopen: make connect()'s return case more consistent with non-TFO 2017-01-25 14:12:21 -05:00
inet_connection_sock.h inet: drop ->bind_conflict 2017-01-18 13:04:28 -05:00
inet_ecn.h ipv6: suppress sparse warnings in IP6_ECN_set_ce() 2016-08-13 15:08:00 -07:00
inet_frag.h net: remove bh disabling around percpu_counter accesses 2017-01-20 11:27:22 -05:00
inet_hashtables.h inet: reset tb->fastreuseport when adding a reuseport sk 2017-01-18 13:04:29 -05:00
inet_sock.h net/tcp-fastopen: Add new API support 2017-01-25 14:04:38 -05:00
inet_timewait_sock.h ipv4: Namespaceify tcp_tw_recycle and tcp_max_tw_buckets knob 2016-12-29 11:38:31 -05:00
inetpeer.h inet: tcp: fix inetpeer_set_addr_v4() 2015-12-16 00:14:12 -05:00
ip.h Introduce a sysctl that modifies the value of PROT_SOCK. 2017-01-24 12:10:51 -05:00
ip6_checksum.h ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short 2016-03-13 23:55:13 -04:00
ip6_fib.h net: ipv6: Fix processing of RAs in presence of VRF 2016-10-27 16:30:52 -04:00
ip6_route.h net: inet: Support UID-based routing in IP protocols. 2016-11-04 14:45:23 -04:00
ip6_tunnel.h ip6_tunnel: Clear IP6CB in ip6tunnel_xmit() 2016-11-02 15:18:36 -04:00
ip_fib.h net: ipv4: make fib_select_default static 2017-01-06 15:57:50 -05:00
ip_tunnels.h net: make ndo_get_stats64 a void function 2017-01-08 17:51:44 -05:00
ip_vs.h ipvs: update real-server binding of outgoing connections in SIP-pe 2016-06-06 09:47:25 +09:00
ipcomp.h
ipconfig.h
ipv6.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-12-03 12:29:53 -05:00
ipx.h
iw_handler.h wext: uninline stream addition functions 2017-01-13 09:38:42 +01:00
kcm.h kcm: Use stream parser 2016-08-17 19:36:23 -04:00
l3mdev.h net: ipv4: Do not drop to make_route if oif is l3mdev 2016-10-13 12:05:26 -04:00
lapb.h
lib80211.h
llc.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
lwtunnel.h lwtunnel: subtract tunnel headroom from mtu on output redirect 2016-11-16 17:01:15 -05:00
mac80211.h mac80211: Add RX flag to indicate ICV stripped 2017-01-12 10:15:18 +01:00
mac802154.h ieee802154: cleanup WARN_ON for fc fetch 2016-07-08 13:23:12 +02:00
mip6.h
mld.h
mpls.h openvswitch: use mpls_hdr 2016-10-03 02:00:22 -04:00
mpls_iptunnel.h mpls: multipath route support 2015-10-23 06:26:42 -07:00
mrp.h
ncsi.h net/ncsi: Introduce ncsi_stop_dev() 2016-10-04 02:11:51 -04:00
ndisc.h ipv6 addrconf: Implemented enhanced DAD (RFC7527) 2016-12-03 23:21:37 -05:00
neighbour.h net: add explicit logging and stat for neighbour table overflow 2015-08-10 13:46:21 -07:00
net_namespace.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-11-22 13:27:16 -05:00
net_ratelimit.h
netevent.h neigh: Send a notification when DELAY_PROBE_TIME changes 2016-07-05 09:06:29 -07:00
netlabel.h netlabel: Implement CALIPSO config functions for SMACK. 2016-06-27 15:06:18 -04:00
netlink.h netlink: revert broken, broken "2-clause nla_ok()" 2016-12-13 14:54:44 -05:00
netprio_cgroup.h net: wrap sock->sk_cgrp_prioidx and ->sk_classid inside a struct 2015-12-08 22:02:33 -05:00
netrom.h
nexthop.h
nl802154.h ieee802154: add netns support 2016-07-08 12:20:57 +02:00
p8022.h
ping.h net: ping: make ping_v6_sendmsg static 2016-03-23 22:09:58 -04:00
pkt_cls.h net sched actions: Add support for user cookies 2017-01-25 12:37:04 -05:00
pkt_sched.h net: make default TX queue length a defined constant 2016-11-07 20:15:55 -05:00
pptp.h pptp: Refactor the struct and macros of PPTP codes 2016-08-15 10:55:53 -07:00
protocol.h udp: Remove udp_offloads 2016-04-07 16:53:30 -04:00
psample.h net: Introduce psample, a new genetlink channel for packet sampling 2017-01-24 13:44:28 -05:00
psnap.h
raw.h net: ip, diag -- Add diag interface for raw sockets 2016-10-23 19:35:24 -04:00
rawv6.h net: ip, diag -- Add diag interface for raw sockets 2016-10-23 19:35:24 -04:00
red.h ktime: Get rid of the union 2016-12-25 17:21:22 +01:00
regulatory.h
request_sock.h ipv4: Namespaceify tcp_max_syn_backlog knob 2016-12-29 11:38:31 -05:00
rose.h
route.h net: inet: Support UID-based routing in IP protocols. 2016-11-04 14:45:23 -04:00
rtnetlink.h net: AF-specific RTM_GETSTATS attributes 2017-01-17 14:38:43 -05:00
sch_generic.h net-tc: convert tc_from to tc_from_ingress and tc_redirected 2017-01-08 20:58:52 -05:00
scm.h unix: correctly track in-flight fds in sending process user_struct 2016-02-08 10:30:42 -05:00
secure_seq.h tcp: randomize tcp timestamp offsets for each connection 2016-12-02 12:49:59 -05:00
seg6.h ipv6: sr: add core files for SR HMAC support 2016-11-09 20:40:06 -05:00
seg6_hmac.h ipv6: sr: add core files for SR HMAC support 2016-11-09 20:40:06 -05:00
slhc_vj.h
smc.h smc: netlink interface for SMC sockets 2017-01-09 16:07:41 -05:00
snmp.h net: snmp: fix 64bit stats on 32bit arches 2016-04-28 11:49:45 -04:00
sock.h sock: use hlist_entry_safe 2017-01-20 11:38:45 -05:00
sock_reuseport.h soreuseport: fix NULL ptr dereference SO_REUSEPORT after bind 2016-01-19 14:44:23 -05:00
Space.h
stp.h
strparser.h kcm: Remove TCP specific references from kcm and strparser 2016-08-28 23:32:41 -04:00
switchdev.h switchdev: remove FIB offload infrastructure 2016-09-28 04:48:00 -04:00
tcp.h net/tcp-fastopen: Add new API support 2017-01-25 14:04:38 -05:00
tcp_states.h
timewait_sock.h
transp_v6.h ipv6: add new struct ipcm6_cookie 2016-05-03 16:08:14 -04:00
tso.h net: tso: add support for IPv6 2015-10-26 22:24:22 -07:00
udp.h inet: collapse ipv4/v6 rcv_saddr_equal functions into one 2017-01-18 13:04:28 -05:00
udp_tunnel.h vxlan: Add new UDP encapsulation offload type for VXLAN-GPE 2016-06-17 20:23:32 -07:00
udplite.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-12-16 10:24:44 -08:00
vsock_addr.h
vxlan.h vxlan: remove unsed vxlan_dev_dst_port() 2016-11-15 12:16:13 -05:00
wext.h
wimax.h
x25.h
x25device.h
xfrm.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-23 06:46:57 -04:00