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linux/net/ipv4
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Priyaranjan Jha e3a5a1e8b6 tcp: add SNMP counter for no. of duplicate segments reported by DSACK 
There are two existing SNMP counters, TCPDSACKRecv and TCPDSACKOfoRecv,
which are incremented depending on whether the DSACKed range is below
the cumulative ACK sequence number or not. Unfortunately, these both
implicitly assume each DSACK covers only one segment. This makes these
counters unusable for estimating spurious retransmit rates,
or real/non-spurious loss rate.

This patch introduces a new SNMP counter, TCPDSACKRecvSegs, which tracks
the estimated number of duplicate segments based on:
(DSACKed sequence range) / MSS. This counter is usable for estimating
spurious retransmit rates, or real/non-spurious loss rate.

Signed-off-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-17 12:54:30 -07:00
..
bpfilter
bpfilter: Take advantage of the facilities of struct pid
2020-07-07 11:58:57 -05:00
netfilter
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
2020-07-08 12:42:40 -07:00
af_inet.c
bpf: Add BPF_CGROUP_INET_SOCK_RELEASE hook
2020-07-08 01:03:31 +02:00
ah4.c
inet: Use fallthrough;
2020-03-12 15:55:00 -07:00
arp.c
inet: Use fallthrough;
2020-03-12 15:55:00 -07:00
bpf_tcp_ca.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2020-03-30 19:52:37 -07:00
cipso_ipv4.c
net: ipv4: kerneldoc fixes
2020-07-13 17:20:39 -07:00
datagram.c
inet: stop leaking jiffies on the wire
2019-11-01 14:57:52 -07:00
devinet.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-05-31 17:48:46 -07:00
esp4_offload.c
net: Add MODULE_DESCRIPTION entries to network modules
2020-06-20 21:33:57 -07:00
esp4.c
ESP: Export esp_output_fill_trailer function
2020-02-19 13:52:32 +01:00
fib_frontend.c
ipv4: nexthop version of fib_info_nh_uses_dev
2020-05-26 16:06:07 -07:00
fib_lookup.h
net: add net available in build_state
2020-03-29 22:30:57 -07:00
fib_notifier.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib_rules.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib_semantics.c
net: Fix the arp error in some cases
2020-06-18 20:21:51 -07:00
fib_trie.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
fou.c
net: Add MODULE_DESCRIPTION entries to network modules
2020-06-20 21:33:57 -07:00
gre_demux.c
gre: fix uninit-value in __iptunnel_pull_header
2020-03-08 21:25:37 -07:00
gre_offload.c
net: remove the check argument from __skb_gro_checksum_convert
2020-01-03 12:24:34 -08:00
icmp.c
ip: Fix SO_MARK in RST, ACK and ICMP packets
2020-07-01 17:38:30 -07:00
igmp.c
ip*_mc_gsfget(): lift copyout of struct group_filter into callers
2020-05-20 20:31:27 -04:00
inet_connection_sock.c
inet: Remove an unnecessary argument of syn_ack_recalc().
2020-07-10 14:37:57 -07:00
inet_diag.c
inet_diag: support for wider protocol numbers
2020-07-09 12:38:41 -07:00
inet_fragment.c
inet: frags: re-introduce skb coalescing for local delivery
2019-08-08 15:55:10 -07:00
inet_hashtables.c
tcp/dccp: fix possible race __inet_lookup_established()
2019-12-13 21:40:49 -08:00
inet_timewait_sock.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
inetpeer.c
inetpeer: fix data-race in inet_putpeer / inet_putpeer
2019-11-07 16:15:56 -08:00
ip_forward.c
ipv4: Revert removal of rt_uses_gateway
2019-09-20 18:23:33 -07:00
ip_fragment.c
inet: frags: re-introduce skb coalescing for local delivery
2019-08-08 15:55:10 -07:00
ip_gre.c
net: add a new ndo_tunnel_ioctl method
2020-05-19 15:45:11 -07:00
ip_input.c
bpf: Add socket assign support
2020-03-30 13:45:04 -07:00
ip_options.c
netfilter: nf_tables: add support for matching IPv4 options
2019-06-21 18:35:51 +02:00
ip_output.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-07-11 00:46:00 -07:00
ip_sockglue.c
ipv4: add ip_sock_set_pktinfo
2020-05-28 11:11:45 -07:00
ip_tunnel_core.c
net: ip_tunnel: add header_ops for layer 3 devices
2020-06-30 12:29:39 -07:00
ip_tunnel.c
ip_tunnel: fix use-after-free in ip_tunnel_lookup()
2020-06-18 20:12:34 -07:00
ip_vti.c
net: vti: implement header_ops->parse_protocol for AF_PACKET
2020-06-30 12:29:39 -07:00
ipcomp.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2019-07-05 15:01:15 -07:00
ipconfig.c
Documentation: nfsroot.rst: Fix references to nfsroot.rst
2020-03-02 13:11:46 -07:00
ipip.c
net: ipip: implement header_ops->parse_protocol for AF_PACKET
2020-06-30 12:29:39 -07:00
ipmr_base.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
ipmr.c
net: ipv4: kerneldoc fixes
2020-07-13 17:20:39 -07:00
Kconfig
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
Makefile
udp_tunnel: add central NIC RX port offload infrastructure
2020-07-10 13:54:00 -07:00
metrics.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
netfilter.c
netfilter: ipv4: remove useless export_symbol
2019-01-28 11:32:58 +01:00
netlink.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
nexthop.c
nexthop: Fix fdb labeling for groups
2020-06-10 13:18:40 -07:00
ping.c
ipv4: fill fl4_icmp_{type,code} in ping_v4_sendmsg
2020-07-07 15:26:37 -07:00
proc.c
tcp: add SNMP counter for no. of duplicate segments reported by DSACK
2020-07-17 12:54:30 -07:00
protocol.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
raw_diag.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-03-12 22:34:48 -07:00
raw.c
raw: Add missing annotations to raw_seq_start() and raw_seq_stop()
2020-03-11 23:19:40 -07:00
route.c
net: ipv4: Fix wrong type conversion from hint to rt in ip_route_use_hint()
2020-06-27 18:02:32 -07:00
syncookies.c
mptcp: handle tcp fallback when using syn cookies
2020-01-29 17:45:20 +01:00
sysctl_net_ipv4.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2020-05-01 17:02:27 -07:00
tcp_bbr.c
tcp_bbr: improve arithmetic division in bbr_update_bw()
2020-01-21 10:45:49 +01:00
tcp_bic.c
tcp: fix stretch ACK bugs in BIC
2020-03-16 18:26:54 -07:00
tcp_bpf.c
bpf: tcp: Recv() should return 0 when the peer socket is closed
2020-06-12 15:10:12 -07:00
tcp_cdg.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_cong.c
tcp: make sure listeners don't initialize congestion-control state
2020-07-09 13:07:45 -07:00
tcp_cubic.c
tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT
2020-06-25 16:08:47 -07:00
tcp_dctcp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_dctcp.h
tcp: refactor DCTCP ECN ACK handling
2018-10-10 22:26:00 -07:00
tcp_diag.c
inet_diag: Move the INET_DIAG_REQ_BYTECODE nlattr to cb->data
2020-02-27 18:50:19 -08:00
tcp_fastopen.c
tcp: add TCP_INFO status for failed client TFO
2019-10-25 19:25:37 -07:00
tcp_highspeed.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_htcp.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_hybla.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_illinois.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_input.c
tcp: add SNMP counter for no. of duplicate segments reported by DSACK
2020-07-17 12:54:30 -07:00
tcp_ipv4.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-07-11 00:46:00 -07:00
tcp_lp.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_metrics.c
net-tcp: Disable TCP ssthresh metrics cache by default
2019-12-09 20:17:48 -08:00
tcp_minisocks.c
mptcp: add new sock flag to deal with join subflows
2020-05-15 12:30:13 -07:00
tcp_nv.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_output.c
net: ipv4: kerneldoc fixes
2020-07-13 17:20:39 -07:00
tcp_rate.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
tcp_recovery.c
tcp: introduce tcp_skb_timestamp_us() helper
2018-09-21 19:37:59 -07:00
tcp_scalable.c
tcp: fix stretch ACK bugs in Scalable
2020-03-16 18:26:54 -07:00
tcp_timer.c
net: ipv4: kerneldoc fixes
2020-07-13 17:20:39 -07:00
tcp_ulp.c
bpf: sockmap: Only check ULP for TCP sockets
2020-03-09 22:34:58 +01:00
tcp_vegas.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_vegas.h
…
tcp_veno.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_westwood.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_yeah.c
tcp: fix stretch ACK bugs in Yeah
2020-03-16 18:26:55 -07:00
tcp.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-07-11 00:46:00 -07:00
tunnel4.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
udp_bpf.c
bpf: Add sockmap hooks for UDP sockets
2020-03-09 22:34:58 +01:00
udp_diag.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-03-12 22:34:48 -07:00
udp_impl.h
udp: add missing rehash callback to udplite
2019-01-17 15:01:08 -08:00
udp_offload.c
udp: initialize is_flist with 0 in udp_gro_receive
2020-03-30 10:35:03 -07:00
udp_tunnel_core.c
udp_tunnel: add central NIC RX port offload infrastructure
2020-07-10 13:54:00 -07:00
udp_tunnel_nic.c
ethtool: add tunnel info interface
2020-07-10 13:54:00 -07:00
udp_tunnel_stub.c
udp_tunnel: add central NIC RX port offload infrastructure
2020-07-10 13:54:00 -07:00
udp.c
net: ipv4: kerneldoc fixes
2020-07-13 17:20:39 -07:00
udplite.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
xfrm4_input.c
xfrm: state: remove extract_input indirection from xfrm_state_afinfo
2020-05-06 09:40:08 +02:00
xfrm4_output.c
xfrm: fix unused variable warning if CONFIG_NETFILTER=n
2020-05-11 15:12:27 +02:00
xfrm4_policy.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2019-12-24 22:28:54 -08:00
xfrm4_protocol.c
xfrm: add route lookup to xfrm4_rcv_encap
2019-12-09 09:59:07 +01:00
xfrm4_state.c
xfrm: remove output_finish indirection from xfrm_state_afinfo
2020-05-06 09:40:08 +02:00
xfrm4_tunnel.c
xfrm: remove type and offload_type map from xfrm_state_afinfo
2019-06-06 08:34:50 +02:00