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linux-stable/net/ipv4
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Pengcheng Yang 432f313577 tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 
commit 62d9f1a694 upstream.

Upon receiving a cumulative ACK that changes the congestion state from
Disorder to Open, the TLP timer is not set. If the sender is app-limited,
it can only wait for the RTO timer to expire and retransmit.

The reason for this is that the TLP timer is set before the congestion
state changes in tcp_ack(), so we delay the time point of calling
tcp_set_xmit_timer() until after tcp_fastretrans_alert() returns and
remove the FLAG_SET_XMIT_TIMER from ack_flag when the RACK reorder timer
is set.

This commit has two additional benefits:
1) Make sure to reset RTO according to RFC6298 when receiving ACK, to
avoid spurious RTO caused by RTO timer early expires.
2) Reduce the xmit timer reschedule once per ACK when the RACK reorder
timer is set.

Fixes: df92c8394e ("tcp: fix xmit timer to only be reset if data ACKed/SACKed")
Link: https://lore.kernel.org/netdev/1611311242-6675-1-git-send-email-yangpc@wangsu.com
Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/1611464834-23030-1-git-send-email-yangpc@wangsu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-03 23:22:23 +01:00
..
netfilter netfilter: rpfilter: mask ecn bits before fib lookup 2021-01-30 13:31:14 +01:00
af_inet.c gso_segment: Reset skb->mac_len after modifying network header 2018-09-29 03:06:00 -07:00
ah4.c
arp.c arp: fix arp_filter on l3slave devices 2018-04-12 12:32:22 +02:00
cipso_ipv4.c netlabel: cope with NULL catmap 2020-05-20 08:17:12 +02:00
datagram.c inet: stop leaking jiffies on the wire 2019-11-10 11:25:37 +01:00
devinet.c devinet: fix memleak in inetdev_init() 2020-06-11 09:22:58 +02:00
esp4.c esp: avoid unneeded kmap_atomic call 2021-01-23 15:48:46 +01:00
esp4_offload.c esp: Fix GRO when the headers not fully in the linear part of the skb. 2018-02-25 11:07:46 +01:00
fib_frontend.c ipv4: Ignore ECN bits for fib lookups in fib_compute_spec_dst() 2021-01-12 20:09:08 +01:00
fib_lookup.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fib_notifier.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fib_rules.c net: fib_rules: Implement notification logic in core 2017-08-03 15:35:59 -07:00
fib_semantics.c net: Fix the arp error in some cases 2020-06-30 15:38:00 -04:00
fib_trie.c ipv4: Silence suspicious RCU usage warning 2020-08-21 09:48:00 +02:00
fou.c net: fou: do not use guehdr after iptunnel_pull_offloads in gue_udp_recv 2019-04-27 09:35:34 +02:00
gre_demux.c gre: fix uninit-value in __iptunnel_pull_header 2020-03-20 10:54:07 +01:00
gre_offload.c net: gre: recompute gre csum for sctp over gre tunnels 2020-08-21 09:48:01 +02:00
icmp.c icmp: randomize the global rate limiter 2020-10-29 09:06:59 +01:00
igmp.c igmp: fix memory leak in igmpv3_del_delrec() 2019-07-31 07:28:44 +02:00
inet_connection_sock.c net: refactor bind_bucket fastreuse into helper 2020-08-21 09:48:14 +02:00
inet_diag.c inet_diag: Fix error path to cancel the meseage in inet_req_diag_fill() 2020-11-24 13:05:37 +01:00
inet_fragment.c net: IP defrag: encapsulate rbtree defrag code into callable functions 2019-04-27 09:35:40 +02:00
inet_hashtables.c net: initialize fastreuse on inet_inherit_port 2020-08-21 09:48:16 +02:00
inet_timewait_sock.c soreuseport: initialise timewait reuseport field 2018-05-16 10:10:24 +02:00
inetpeer.c inetpeer: fix data-race in inet_putpeer / inet_putpeer 2020-01-04 14:00:07 +01:00
ip_forward.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ip_fragment.c net: IP defrag: encapsulate rbtree defrag code into callable functions 2019-04-27 09:35:40 +02:00
ip_gre.c ip_gre: fix parsing gre header in ipgre_err 2019-11-20 18:00:02 +01:00
ip_input.c vrf: check accept_source_route on the original netdevice 2019-04-17 08:37:48 +02:00
ip_options.c vrf: check accept_source_route on the original netdevice 2019-04-17 08:37:48 +02:00
ip_output.c net: ip: always refragment ip defragmented packets 2021-01-17 13:58:58 +01:00
ip_sockglue.c ip: on queued skb use skb_header_pointer instead of pskb_may_pull 2019-01-23 08:09:47 +01:00
ip_tunnel.c net: fix pmtu check in nopmtudisc mode 2021-01-17 13:58:58 +01:00
ip_tunnel_core.c ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL 2019-08-04 09:32:03 +02:00
ip_vti.c ip_vti: receive ipip packet by calling ip_tunnel_rcv 2020-06-03 08:18:08 +02:00
ipcomp.c
ipconfig.c ipconfig: Correctly initialise ic_nameservers 2018-08-03 07:50:39 +02:00
ipip.c net: ipip: fix wrong address family in init error path 2020-06-03 08:17:31 +02:00
ipmr.c ipv4: Fix potential Spectre v1 vulnerability 2019-01-09 17:14:42 +01:00
Kconfig vti[6]: fix packet tx through bpf_redirect() in XinY cases 2020-04-02 16:34:32 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netfilter.c
ping.c ipv4: fill fl4_icmp_{type,code} in ping_v4_sendmsg 2020-07-22 09:22:19 +02:00
proc.c tcp: tcp_fragment() should apply sane memory limits 2019-06-17 19:52:44 +02:00
protocol.c
raw.c net: ipv4: emulate READ_ONCE() on ->hdrincl bit-field in raw_sendmsg() 2020-05-02 17:24:11 +02:00
raw_diag.c inet_diag: return classid for all socket types 2020-03-20 10:54:13 +01:00
route.c ipv4: Fix tos mask in inet_rtm_getroute() 2020-12-08 10:17:33 +01:00
syncookies.c net: Update window_clamp if SOCK_RCVBUF is set 2020-11-18 18:28:00 +01:00
sysctl_net_ipv4.c tcp: add tcp_min_snd_mss sysctl 2019-06-17 19:52:44 +02:00
tcp.c tcp: make sure listeners don't initialize congestion-control state 2020-07-22 09:22:20 +02:00
tcp_bbr.c tcp: only postpone PROBE_RTT if RTT is < current min_rtt estimate 2020-11-24 13:05:42 +01:00
tcp_bic.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_cdg.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_cong.c tcp: Set INET_ECN_xmit configuration in tcp_reinit_congestion_control 2020-12-08 10:17:33 +01:00
tcp_cubic.c tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT 2020-06-30 15:37:59 -04:00
tcp_dctcp.c tcp: Ensure DCTCP reacts to losses 2019-04-17 08:37:47 +02:00
tcp_diag.c tcp_diag: report TCP MD5 signing keys and addresses 2017-09-01 18:38:09 -07:00
tcp_fastopen.c net: add rb_to_skb() and other rb tree helpers 2018-09-19 22:43:47 +02:00
tcp_highspeed.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_htcp.c tcp: fix cwnd undo in Reno and HTCP congestion controls 2017-08-06 21:25:10 -07:00
tcp_hybla.c
tcp_illinois.c net/tcp/illinois: replace broken algorithm reference link 2018-05-30 07:52:06 +02:00
tcp_input.c tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 2021-02-03 23:22:23 +01:00
tcp_ipv4.c tcp: md5: refine tcp_md5_do_add()/tcp_md5_hash_key() barriers 2020-07-22 09:22:20 +02:00
tcp_lp.c
tcp_metrics.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tcp_minisocks.c tcp: do not restart timewait timer on rst reception 2018-09-15 09:45:25 +02:00
tcp_nv.c tcp_nv: fix potential integer overflow in tcpnv_acked 2018-04-26 11:02:13 +02:00
tcp_offload.c gso: validate gso_type in GSO handlers 2018-01-31 14:03:47 +01:00
tcp_output.c tcp: fix cwnd-limited bug for TSO deferral where we send nothing 2020-12-29 13:46:44 +01:00
tcp_probe.c tcp: remove redundant argument from tcp_rcv_established() 2017-07-24 17:28:12 -07:00
tcp_rate.c tcp: invalidate rate samples during SACK reneging 2018-01-02 20:31:09 +01:00
tcp_recovery.c tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 2021-02-03 23:22:23 +01:00
tcp_scalable.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_timer.c tcp: exit if nothing to retransmit on RTO timeout 2019-12-17 20:38:43 +01:00
tcp_ulp.c tcp, ulp: add alias for all ulp modules 2018-09-15 09:45:29 +02:00
tcp_vegas.c tcp: fix under-evaluated ssthresh in TCP Vegas 2017-12-25 14:26:30 +01:00
tcp_vegas.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tcp_veno.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_westwood.c tcp: Revert "tcp: remove CA_ACK_SLOWPATH" 2017-08-30 11:20:08 -07:00
tcp_yeah.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tunnel4.c
udp.c udp: mask TOS bits in udp_v4_early_demux() 2021-01-30 13:31:15 +01:00
udp_diag.c inet_diag: return classid for all socket types 2020-03-20 10:54:13 +01:00
udp_impl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
udp_offload.c net: fix use-after-free in GRO with ESP 2018-07-22 14:28:44 +02:00
udp_tunnel.c net: add infrastructure to un-offload UDP tunnel port 2017-07-24 13:52:59 -07:00
udplite.c
xfrm4_input.c xfrm: reset transport header back to network header after all input transforms ahave been applied 2018-11-04 14:52:37 +01:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c xfrm: reset transport header back to network header after all input transforms ahave been applied 2018-11-04 14:52:37 +01:00
xfrm4_mode_tunnel.c
xfrm4_output.c xfrm: Always set XFRM_TRANSFORMED in xfrm{4,6}_output_finish 2020-05-02 17:24:18 +02:00
xfrm4_policy.c net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2020-01-04 14:00:14 +01:00
xfrm4_protocol.c
xfrm4_state.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xfrm4_tunnel.c