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44abafc4cc
linux/net
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Yuchung Cheng 44abafc4cc tcp: disallow cwnd undo when switching congestion control 
When the sender switches its congestion control during loss
recovery, if the recovery is spurious then it may incorrectly
revert cwnd and ssthresh to the older values set by a previous
congestion control. Consider a congestion control (like BBR)
that does not use ssthresh and keeps it infinite: the connection
may incorrectly revert cwnd to an infinite value when switching
from BBR to another congestion control.

This patch fixes it by disallowing such cwnd undo operation
upon switching congestion control.  Note that undo_marker
is not reset s.t. the packets that were incorrectly marked
lost would be corrected. We only avoid undoing the cwnd in
tcp_undo_cwnd_reduction().

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-02 14:18:13 -04:00
..
6lowpan 6lowpan: Don't set IFF_NO_QUEUE 2017-04-12 22:02:40 +02:00
9p xen: fixes for 4.12 rc2 2017-05-19 15:06:48 -07:00
802
8021q vlan: Keep NETIF_F_HW_CSUM similar to other software devices 2017-05-08 14:39:19 -04:00
appletalk lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
atm neighbour: fix nlmsg_pid in notifications 2017-03-22 10:48:49 -07:00
ax25 net: Work around lockdep limitation in sockets that use sockets 2017-03-09 18:23:27 -08:00
batman-adv This feature/cleanup patchset includes the following patches: 2017-04-06 14:37:50 -07:00
bluetooth Bluetooth: Add selftest for ECDH key generation 2017-04-30 16:52:43 +03:00
bpf bpf: Align packet data properly in program testing framework. 2017-05-02 11:46:28 -04:00
bridge net: bridge: start hello timer only if device is up 2017-06-01 12:28:31 -04:00
caif sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
can can: fix CAN BCM build with CONFIG_PROC_FS disabled 2017-04-27 09:34:13 +02:00
ceph libceph: cleanup old messages according to reconnect seq 2017-05-24 18:10:51 +02:00
core ipv4: add reference counting to metrics 2017-05-26 14:57:07 -04:00
dcb net: rtnetlink: plumb extended ack to doit function 2017-04-17 15:35:38 -04:00
dccp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-05-15 15:50:49 -07:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-05-09 15:42:31 -07:00
dns_resolver Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-03-03 10:16:38 -08:00
dsa net: dsa: Move dsa_switch_{suspend,resume} out of legacy.c 2017-06-02 10:31:16 -04:00
ethernet Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2017-02-16 21:25:49 -05:00
hsr netlink: extended ACK reporting 2017-04-13 13:58:20 -04:00
ieee802154 netlink: pass extended ACK struct where available 2017-04-13 13:58:22 -04:00
ife
ipv4 tcp: disallow cwnd undo when switching congestion control 2017-06-02 14:18:13 -04:00
ipv6 ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt() 2017-06-02 13:57:27 -04:00
ipx ipx: call ipxitf_put() in ioctl error path 2017-05-02 15:34:53 -04:00
irda net: Work around lockdep limitation in sockets that use sockets 2017-03-09 18:23:27 -08:00
iucv net: Work around lockdep limitation in sockets that use sockets 2017-03-09 18:23:27 -08:00
kcm kcm: remove a useless copy_from_user() 2017-04-17 13:28:48 -04:00
key af_key: Fix slab-out-of-bounds in pfkey_compile_policy. 2017-05-08 08:03:01 +02:00
l2tp l2tp: remove useless device duplication test in l2tp_eth_create() 2017-04-27 16:32:13 -04:00
l3mdev
lapb
llc net: llc: add lock_sock in llc_ui_bind to avoid a race condition 2017-05-26 14:20:29 -04:00
mac80211 mac80211: fix dropped counter in multiqueue RX 2017-06-01 21:26:03 +02:00
mac802154 drivers: add explicit interrupt.h includes 2017-03-30 11:05:34 -07:00
mpls mpls: fix clearing of dead nh_flags on link up 2017-05-31 14:48:24 -04:00
ncsi
netfilter netfilter: ctnetlink: fix incorrect nf_ct_put during hash resize 2017-05-24 11:26:01 +02:00
netlabel netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
netlink netlink: don't send unknown nsid 2017-06-01 11:49:39 -04:00
netrom net: Work around lockdep limitation in sockets that use sockets 2017-03-09 18:23:27 -08:00
nfc NFC 4.12 pull request 2017-04-21 15:29:40 -04:00
openvswitch netfilter: introduce nf_conntrack_helper_put helper function 2017-05-15 12:42:29 +02:00
packet net/packet: fix missing net_device reference release 2017-05-15 14:22:12 -04:00
phonet net: rtnetlink: plumb extended ack to doit function 2017-04-17 15:35:38 -04:00
psample
qrtr Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-21 20:23:53 -07:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-05-02 16:40:27 -07:00
rfkill
rose net: Work around lockdep limitation in sockets that use sockets 2017-03-09 18:23:27 -08:00
rxrpc rxrpc: Trace client call connection 2017-04-06 11:10:41 +01:00
sched net: sched: cls_matchall: fix null pointer dereference 2017-05-22 14:54:16 -04:00
sctp sctp: fix ICMP processing if skb is non-linear 2017-05-26 14:40:46 -04:00
smc net/smc: Add warning about remote memory exposure 2017-05-16 14:49:43 -04:00
strparser strparser: destroy workqueue on module exit 2017-03-03 20:43:26 -08:00
sunrpc Another RDMA update from Chuck Lever, and a bunch of miscellaneous 2017-05-10 13:29:23 -07:00
switchdev netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
tipc tipc: make macro tipc_wait_for_cond() smp safe 2017-05-11 22:19:30 -04:00
unix af_unix: Use designated initializers 2017-04-06 12:43:04 -07:00
vmw_vsock vsock: use new wait API for vsock_stream_sendmsg() 2017-05-22 14:39:36 -04:00
wimax
wireless cfg80211: make cfg80211_sched_scan_results() work from atomic context 2017-05-23 14:36:46 +02:00
x25 net: x25: fix one potential use-after-free issue 2017-05-18 10:05:40 -04:00
xfrm xfrm: fix state migration copy replay sequence numbers 2017-05-19 12:49:13 +02:00
compat.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-02-22 10:15:09 -08:00
Kconfig bpf: make jited programs visible in traces 2017-02-17 13:40:05 -05:00
Makefile bpf: introduce BPF_PROG_TEST_RUN command 2017-04-01 12:45:57 -07:00
socket.c l2tp: device MTU setup, tunnel socket needs a lock 2017-04-17 13:01:48 -04:00
sysctl_net.c sysctl: Remove dead register_sysctl_root 2017-04-16 23:42:49 -05:00