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linux/net/ipv4
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Yuchung Cheng c84a57113f tcp: fix bogus RTT on special retransmission 
RTT may be bogus with tall loss probe (TLP) when a packet
is retransmitted and latter (s)acked without TCPCB_SACKED_RETRANS flag.

For example, TLP calls __tcp_retransmit_skb() instead of
tcp_retransmit_skb(). The skb timestamps are updated but the sacked
flag is not marked with TCPCB_SACKED_RETRANS. As a result we'll
get bogus RTT in tcp_clean_rtx_queue() or in tcp_sacktag_one() on
spurious retransmission.

The fix is to apply the sticky flag TCP_EVER_RETRANS to enforce Karn's
check on RTT sampling. However this will disable F-RTO if timeout occurs
after TLP, by resetting undo_marker in tcp_enter_loss(). We relax this
check to only if any pending retransmists are still in-flight.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Nandita Dukkipati <nanditad@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-03 15:33:02 -05:00
..
netfilter
netfilter: nf_nat_snmp_basic: fix duplicates in if/else branches
2014-02-14 11:37:36 +01:00
af_inet.c
ipv4: ipv6: better estimate tunnel header cut for correct ufo handling
2014-02-25 18:27:06 -05:00
ah4.c
ipv4: properly refresh rtable entries on pmtu/redirect events
2013-06-03 00:07:42 -07:00
arp.c
ipv4: arp: update neighbour address when a gratuitous arp is received and arp_accept is set
2014-01-02 00:08:38 -05:00
cipso_ipv4.c
ipv4: ERROR: code indent should use tabs where possible
2013-12-26 13:43:21 -05:00
datagram.c
net: Remove FLOWI_FLAG_CAN_SLEEP
2013-12-06 07:24:39 +01:00
devinet.c
ipv4: Fix runtime WARNING in rtmsg_ifa()
2014-02-06 20:02:15 -08:00
esp4.c
net: esp{4,6}: get rid of struct esp_data
2013-10-29 06:39:42 +01:00
fib_frontend.c
fib_frontend: fix possible NULL pointer dereference
2014-01-24 15:51:26 -08:00
fib_lookup.h
ipv4: make fib_detect_death static
2013-12-28 17:01:46 -05:00
fib_rules.c
inet: fix NULL pointer Oops in fib(6)_rule_suppress
2013-12-10 17:54:23 -05:00
fib_semantics.c
ipv4: make fib_detect_death static
2013-12-28 17:01:46 -05:00
fib_trie.c
seq_file: remove "%n" usage from seq_file users
2013-11-15 09:32:20 +09:00
gre_demux.c
gre_offload: statically build GRE offloading support
2014-01-06 20:28:34 -05:00
gre_offload.c
net/ipv4: don't use module_init in non-modular gre_offload
2014-01-16 16:08:27 -08:00
icmp.c
ipv4: introduce hardened ip_no_pmtu_disc mode
2014-01-13 11:22:55 -08:00
igmp.c
net: replace macros net_random and net_srandom with direct calls to prandom
2014-01-14 15:15:25 -08:00
inet_connection_sock.c
net: replace macros net_random and net_srandom with direct calls to prandom
2014-01-14 15:15:25 -08:00
inet_diag.c
inet_diag: fix inet_diag_dump_icsk() to use correct state for timewait sockets
2014-01-13 22:35:46 -08:00
inet_fragment.c
inet: remove old fragmentation hash initializing
2013-10-23 17:01:41 -04:00
inet_hashtables.c
inet: convert inet_ehash_secret and ipv6_hash_secret to net_get_random_once
2013-10-19 19:45:35 -04:00
inet_lro.c
lro: remove dead code
2013-12-29 16:34:25 -05:00
inet_timewait_sock.c
tcp/dccp: remove twchain
2013-10-08 23:19:24 -04:00
inetpeer.c
ipv4: remove unused function
2013-12-28 17:03:20 -05:00
ip_forward.c
net: ip, ipv6: handle gso skbs in forwarding path
2014-02-13 17:17:02 -05:00
ip_fragment.c
net: Add utility functions to clear rxhash
2013-12-17 16:36:21 -05:00
ip_gre.c
net: gre: use icmp_hdr() to get inner ip header
2014-01-27 20:38:26 -08:00
ip_input.c
net: Fix memory leak if TPROXY used with TCP early demux
2014-01-27 16:22:11 -08:00
ip_options.c
ipv4: switch and case should be at the same indent
2014-01-02 03:30:36 -05:00
ip_output.c
netfilter: nf_tables: fix nf_trace always-on with XT_TRACE=n
2014-02-17 11:20:12 +01:00
ip_sockglue.c
ipv6: make IPV6_RECVPKTINFO work for ipv4 datagrams
2014-01-19 19:53:18 -08:00
ip_tunnel_core.c
ip_tunnel: Move ip_tunnel_get_stats64 into ip_tunnel_core.c
2014-02-20 02:14:23 -05:00
ip_tunnel.c
sit: fix panic with route cache in ip tunnels
2014-02-20 13:13:50 -05:00
ip_vti.c
ipv4: be friend with drop monitor
2014-01-18 23:08:02 -08:00
ipcomp.c
ipv4: properly refresh rtable entries on pmtu/redirect events
2013-06-03 00:07:42 -07:00
ipconfig.c
ipv4: ipconfig.c: add parentheses in an if statement
2014-02-14 00:14:23 -05:00
ipip.c
ipv4: be friend with drop monitor
2014-01-18 23:08:02 -08:00
ipmr.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2014-01-18 00:55:41 -08:00
Kconfig
net: neighbour: Remove CONFIG_ARPD
2013-09-03 21:41:43 -04:00
Makefile
gre_offload: statically build GRE offloading support
2014-01-06 20:28:34 -05:00
netfilter.c
netfilter: add my copyright statements
2013-04-18 20:27:55 +02:00
ping.c
ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts
2014-01-21 16:59:19 -08:00
proc.c
ipv4: spaces required around that '='
2014-01-02 03:30:36 -05:00
protocol.c
net: remove outdated comment for ipv4 and ipv6 protocol handler
2013-11-28 18:47:51 -05:00
raw.c
net: add build-time checks for msg->msg_name size
2014-01-18 23:04:16 -08:00
route.c
ipv4: fix counter in_slow_tot
2014-02-17 16:54:42 -05:00
syncookies.c
ipv4: fix checkpatch error "space prohibited"
2013-12-26 13:43:21 -05:00
sysctl_net_ipv4.c
ipv4: introduce ip_dst_mtu_maybe_forward and protect forwarding path against pmtu spoofing
2014-01-13 11:22:54 -08:00
tcp_bic.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_cong.c
tcp: reduce the bloat caused by tcp_is_cwnd_limited()
2014-02-24 19:13:38 -05:00
tcp_cubic.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_diag.c
inet_diag: Rename inet_diag_req into inet_diag_req_v2
2012-01-11 12:56:06 -08:00
tcp_fastopen.c
tcp: enable sockets to use MSG_FASTOPEN by default
2013-11-04 19:57:47 -05:00
tcp_highspeed.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_htcp.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_hybla.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_illinois.c
remove extra definitions of U32_MAX
2014-01-23 16:36:55 -08:00
tcp_input.c
tcp: fix bogus RTT on special retransmission
2014-03-03 15:33:02 -05:00
tcp_ipv4.c
tcp: delete redundant calls of tcp_mtup_init()
2014-01-21 16:52:31 -08:00
tcp_lp.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_memcontrol.c
tcp_memcontrol: Cleanup/fix cg_proto->memory_pressure handling.
2013-12-05 21:01:01 -05:00
tcp_metrics.c
tcp: metrics: Handle v6/v4-mapped sockets in tcp-metrics
2014-01-23 12:48:28 -08:00
tcp_minisocks.c
ipv6: tcp: fix flowlabel value in ACK messages send from TIME_WAIT
2014-01-17 17:56:33 -08:00
tcp_offload.c
tcp: do not export tcp_gso_segment() and tcp_gro_receive()
2014-01-14 18:53:48 -08:00
tcp_output.c
tcp: fix bogus RTT on special retransmission
2014-03-03 15:33:02 -05:00
tcp_probe.c
ipv4: ERROR: do not initialise globals to 0 or NULL
2013-12-26 13:43:21 -05:00
tcp_scalable.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_timer.c
tcp: temporarily disable Fast Open on SYN timeout
2013-10-29 22:50:41 -04:00
tcp_vegas.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_vegas.h
net: ipv4/ipv6: Remove extern from function prototypes
2013-10-19 19:12:11 -04:00
tcp_veno.c
tcp: properly handle stretch acks in slow start
2013-11-04 19:57:59 -05:00
tcp_westwood.c
tcp: refactor F-RTO
2013-03-21 11:47:50 -04:00
tcp_yeah.c
ipv4: ipv4: Cleanup the comments in tcp_yeah.c
2013-12-26 13:43:55 -05:00
tcp.c
net-tcp: fastopen: fix high order allocations
2014-02-22 00:05:21 -05:00
tunnel4.c
net: Convert printks to pr_<level>
2012-03-11 23:42:51 -07:00
udp_diag.c
netlink: rename ssk to sk in struct netlink_skb_params
2013-04-19 14:57:56 -04:00
udp_impl.h
net: ipv4/ipv6: Remove extern from function prototypes
2013-10-19 19:12:11 -04:00
udp_offload.c
net/ipv4: Use proper RCU APIs for writer-side in udp_offload.c
2014-02-04 20:01:55 -08:00
udp.c
net: add build-time checks for msg->msg_name size
2014-01-18 23:04:16 -08:00
udplite.c
net: ipv4: Standardize prefixes for message logging
2012-03-12 17:05:21 -07:00
xfrm4_input.c
net: Add skb_unclone() helper function.
2013-02-15 15:10:37 -05:00
xfrm4_mode_beet.c
ipv4: ERROR: code indent should use tabs where possible
2013-12-26 13:43:21 -05:00
xfrm4_mode_transport.c
…
xfrm4_mode_tunnel.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2013-09-30 15:24:57 -04:00
xfrm4_output.c
xfrm: revert ipv4 mtu determination to dst_mtu
2013-08-26 12:40:53 +02:00
xfrm4_policy.c
xfrm: Fix null pointer dereference when decoding sessions
2013-11-01 07:08:46 +01:00
xfrm4_state.c
inet: make no_pmtu_disc per namespace and kill ipv4_config
2013-12-18 16:58:20 -05:00
xfrm4_tunnel.c
sit: add IPv4 over IPv4 support
2013-05-31 17:19:05 -07:00