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mirror-linux/net/ipv4
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Pengcheng Yang 62d9f1a694 tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 
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>
 		2021-01-23 21:33:01 -08:00
..
bpfilter
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netfilter netfilter: rpfilter: mask ecn bits before fib lookup 2021-01-19 13:54:30 -08:00
Kconfig
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Makefile
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af_inet.c bpf: Allow bpf_{s,g}etsockopt from cgroup bind{4,6} hooks 2020-12-02 13:25:11 -08:00
ah4.c
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arp.c net: Exempt multicast addresses from five-second neighbor lifetime 2020-11-13 14:24:39 -08:00
bpf_tcp_ca.c bpf: Remove hard-coded btf_vmlinux assumption from BPF verifier 2020-12-03 17:38:21 -08:00
cipso_ipv4.c
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datagram.c
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devinet.c treewide: rename nla_strlcpy to nla_strscpy. 2020-11-16 08:08:54 -08:00
esp4.c esp: avoid unneeded kmap_atomic call 2021-01-11 18:20:09 -08:00
esp4_offload.c
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fib_frontend.c ipv4: Ignore ECN bits for fib lookups in fib_compute_spec_dst() 2020-12-28 14:44:32 -08:00
fib_lookup.h
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fib_notifier.c
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fib_rules.c
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fib_semantics.c treewide: rename nla_strlcpy to nla_strscpy. 2020-11-16 08:08:54 -08:00
fib_trie.c nexthop: Remove in-kernel route notifications when nexthop changes 2020-11-06 11:28:50 -08:00
fou.c genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
gre_demux.c erspan: fix version 1 check in gre_parse_header() 2020-12-28 15:00:00 -08:00
gre_offload.c
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icmp.c lsm,selinux: pass flowi_common instead of flowi to the LSM hooks 2020-11-23 18:36:21 -05:00
igmp.c
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inet_connection_sock.c tcp: fix TCP_USER_TIMEOUT with zero window 2021-01-18 19:59:17 -08:00
inet_diag.c inet_diag: Fix error path to cancel the meseage in inet_req_diag_fill() 2020-11-17 16:08:36 -08:00
inet_fragment.c inet: frags: batch fqdir destroy works 2020-12-12 15:08:54 -08:00
inet_hashtables.c tcp: fix race condition when creating child sockets from syncookies 2020-11-23 16:32:33 -08:00
inet_timewait_sock.c
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inetpeer.c
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ip_forward.c
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ip_fragment.c
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ip_gre.c ipv4/ipv6: switch to dev_get_tstats64 2020-11-09 17:50:28 -08:00
ip_input.c
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ip_options.c
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ip_output.c net: ip: always refragment ip defragmented packets 2021-01-07 14:42:36 -08:00
ip_sockglue.c
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ip_tunnel.c net: fix pmtu check in nopmtudisc mode 2021-01-07 14:42:36 -08:00
ip_tunnel_core.c Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-12 16:54:48 -08:00
ip_vti.c vti: switch to dev_get_tstats64 2020-11-09 17:50:28 -08:00
ipcomp.c
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ipconfig.c net: ipconfig: Avoid spurious blank lines in boot log 2020-11-12 14:53:33 -08:00
ipip.c ipv4/ipv6: switch to dev_get_tstats64 2020-11-09 17:50:28 -08:00
ipmr.c
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ipmr_base.c
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metrics.c treewide: rename nla_strlcpy to nla_strscpy. 2020-11-16 08:08:54 -08:00
netfilter.c netfilter: use actual socket sk rather than skb sk when routing harder 2020-10-30 12:57:39 +01:00
netlink.c
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nexthop.c nexthop: Bounce NHA_GATEWAY in FDB nexthop groups 2021-01-07 18:47:18 -08:00
ping.c lsm,selinux: pass flowi_common instead of flowi to the LSM hooks 2020-11-23 18:36:21 -05:00
proc.c net: udp: introduce UDP_MIB_MEMERRORS for udp_mem 2020-11-09 15:34:44 -08:00
protocol.c
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raw.c lsm,selinux: pass flowi_common instead of flowi to the LSM hooks 2020-11-23 18:36:21 -05:00
raw_diag.c
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route.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
syncookies.c selinux/stable-5.11 PR 20201214 2020-12-16 11:01:04 -08:00
sysctl_net_ipv4.c
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tcp.c tcp: fix TCP_USER_TIMEOUT with zero window 2021-01-18 19:59:17 -08:00
tcp_bbr.c tcp: only postpone PROBE_RTT if RTT is < current min_rtt estimate 2020-11-17 11:03:22 -08:00
tcp_bic.c
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tcp_bpf.c bpf, sockmap: Ensure SO_RCVBUF memory is observed on ingress redirect 2020-11-18 00:12:34 +01:00
tcp_cdg.c
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tcp_cong.c tcp: Set INET_ECN_xmit configuration in tcp_reinit_congestion_control 2020-11-20 18:09:47 -08:00
tcp_cubic.c
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tcp_dctcp.c
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tcp_dctcp.h
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tcp_diag.c
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tcp_fastopen.c
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tcp_highspeed.c
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tcp_htcp.c
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tcp_hybla.c
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tcp_illinois.c
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tcp_input.c tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 2021-01-23 21:33:01 -08:00
tcp_ipv4.c tcp: Fix potential use-after-free due to double kfree() 2021-01-20 08:56:16 -08:00
tcp_lp.c net: ipv4: Fix some kerneldoc warnings in TCP Low Priority 2020-10-30 12:10:57 -07:00
tcp_metrics.c fixes-v5.11 2020-12-14 16:40:27 -08:00
tcp_minisocks.c tcp: parse mptcp options contained in reset packets 2020-12-14 17:30:06 -08:00
tcp_nv.c
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tcp_offload.c
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tcp_output.c tcp: make TCP_USER_TIMEOUT accurate for zero window probes 2021-01-23 19:32:51 -08:00
tcp_rate.c
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tcp_recovery.c tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 2021-01-23 21:33:01 -08:00
tcp_scalable.c
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tcp_timer.c tcp: make TCP_USER_TIMEOUT accurate for zero window probes 2021-01-23 19:32:51 -08:00
tcp_ulp.c
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tcp_vegas.c tcp: use semicolons rather than commas to separate statements 2020-10-13 17:11:52 -07:00
tcp_vegas.h
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tcp_veno.c
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tcp_westwood.c
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tcp_yeah.c
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tunnel4.c
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udp.c udp: mask TOS bits in udp_v4_early_demux() 2021-01-19 13:54:30 -08:00
udp_bpf.c
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udp_diag.c net: udp: remove redundant initialization in udp_dump_one 2020-11-09 16:42:49 -08:00
udp_impl.h
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udp_offload.c Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-11-12 16:54:48 -08:00
udp_tunnel_core.c
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udp_tunnel_nic.c
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udp_tunnel_stub.c
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udplite.c
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xfrm4_input.c
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xfrm4_output.c
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xfrm4_policy.c
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xfrm4_protocol.c
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xfrm4_state.c
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xfrm4_tunnel.c xfrm: interface: fix the priorities for ipip and ipv6 tunnels 2020-10-09 12:29:48 +02:00