Alexander Duyck 407c85c7dd tcp: Set ECT0 bit in tos/tclass for synack when BPF needs ECN ... When a BPF program is used to select between a type of TCP congestion control algorithm that uses either ECN or not there is a case where the synack for the frame was coming up without the ECT0 bit set. A bit of research found that this was due to the final socket being configured to dctcp while the listener socket was staying in cubic. To reproduce it all that is needed is to monitor TCP traffic while running the sample bpf program "samples/bpf/tcp_cong_kern.c". What is observed, assuming tcp_dctcp module is loaded or compiled in and the traffic matches the rules in the sample file, is that for all frames with the exception of the synack the ECT0 bit is set. To address that it is necessary to make one additional call to tcp_bpf_ca_needs_ecn using the request socket and then use the output of that to set the ECT0 bit for the tos/tclass of the packet. Fixes: 91b5b21c7c ("bpf: Add support for changing congestion control") Signed-off-by: Alexander Duyck <alexanderduyck@fb.com> Link: https://lore.kernel.org/r/160593039663.2604.1374502006916871573.stgit@localhost.localdomain Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2020-11-24 14:12:55 -08:00
..
6lowpan	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
9p	net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid	2020-10-12 10:05:47 +02:00
802
8021q	net: vlan: Fixed signedness in vlan_group_prealloc_vid()	2020-09-28 00:51:39 -07:00
appletalk	appletalk: Fix atalk_proc_init() return path	2020-08-03 15:48:32 -07:00
atm	net: atm: fix update of position index in lec_seq_next	2020-10-31 12:26:30 -07:00
ax25	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-07-25 17:49:04 -07:00
batman-adv	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
bluetooth	Bluetooth: Replace zero-length array with flexible-array member	2020-10-29 17:22:59 -05:00
bpf	bpf: fix raw_tp test run in preempt kernel	2020-09-30 08:34:08 -07:00
bpfilter	Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"	2020-10-15 12:33:24 -07:00
bridge	net: bridge: add missing counters to ndo_get_stats64 callback	2020-11-16 15:47:50 -08:00
caif	caif: Remove duplicate macro SRVL_CTRL_PKT_SIZE	2020-09-05 15:57:05 -07:00
can	can: af_can: prevent potential access of uninitialized member in canfd_rcv()	2020-11-15 18:24:33 +01:00
ceph	libceph: clear con->out_msg on Policy::stateful_server faults	2020-10-12 15:29:27 +02:00
core	devlink: Fix reload stats structure	2020-11-24 13:04:04 -08:00
dcb	net: DCB: Validate DCB_ATTR_DCB_BUFFER argument	2020-09-10 15:09:08 -07:00
dccp	tcp: fix race condition when creating child sockets from syncookies	2020-11-23 16:32:33 -08:00
decnet	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
dns_resolver
dsa	net: dsa: tag_ksz: KSZ8795 and KSZ9477 also use tail tags	2020-10-19 17:32:50 -07:00
ethernet	net: move devres helpers into a separate source file	2020-05-23 16:56:17 -07:00
ethtool	ethtool: netlink: add missing netdev_features_change() call	2020-11-09 17:15:34 -08:00
hsr	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
ieee802154	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
ife
ipv4	tcp: Set ECT0 bit in tos/tclass for synack when BPF needs ECN	2020-11-24 14:12:55 -08:00
ipv6	tcp: Set ECT0 bit in tos/tclass for synack when BPF needs ECN	2020-11-24 14:12:55 -08:00
iucv	net/af_iucv: set correct sk_protocol for child sockets	2020-11-21 14:43:45 -08:00
kcm	net: pass a sockptr_t into ->setsockopt	2020-07-24 15:41:54 -07:00
key	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-08-02 01:02:12 -07:00
l2tp	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
l3mdev	net: Fix some comments	2020-08-27 07:55:59 -07:00
lapb	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
llc	net: pass a sockptr_t into ->setsockopt	2020-07-24 15:41:54 -07:00
mac80211	mac80211: free sta in sta_info_insert_finish() on errors	2020-11-13 09:48:32 +01:00
mac802154	Merge tag 'ieee802154-for-davem-2020-09-08' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan	2020-09-08 20:12:58 -07:00
mpls	mpls: load mpls_gso after mpls_iptunnel	2020-10-20 21:16:45 -07:00
mptcp	mptcp: provide rmem[0] limit	2020-11-09 17:34:34 -08:00
ncsi	net/ncsi: Fix netlink registration	2020-11-12 17:00:13 -08:00
netfilter	netfilter: ipset: Update byte and packet counters regardless of whether they match	2020-10-31 11:11:11 +01:00
netlabel	netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist()	2020-11-14 12:07:57 -08:00
netlink	netlink: export policy in extended ACK	2020-10-09 20:22:32 -07:00
netrom	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
nfc	nfc: Ensure presence of NFC_ATTR_FIRMWARE_NAME attribute in nfc_genl_fw_download()	2020-10-20 17:06:22 -07:00
nsh	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
openvswitch	net: openvswitch: silence suspicious RCU usage warning	2020-11-03 16:57:42 -08:00
packet	net/packet: fix packet receive on L3 devices without visible hard header	2020-11-23 17:29:36 -08:00
phonet	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
psample	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
qrtr	net: qrtr: ns: Fix the incorrect usage of rcu_read_lock()	2020-10-06 06:01:35 -07:00
rds	RDMA: Add rdma_connect_locked()	2020-10-28 09:14:49 -03:00
rfkill	rfkill: Fix use-after-free in rfkill_resume()	2020-11-12 09:18:06 +01:00
rose	rose: Fix Null pointer dereference in rose_send_frame()	2020-11-20 10:04:58 -08:00
rxrpc	rxrpc: Fix loss of final ack on shutdown	2020-10-15 13:28:00 +01:00
sched	netem: fix zero division in tabledist	2020-10-29 11:45:47 -07:00
sctp	sctp: change to hold/put transport for proto_unreach_timer	2020-11-14 11:57:12 -08:00
smc	net/smc: fix direct access to ib_gid_addr->ndev in smc_ib_determine_gid()	2020-11-19 10:59:19 -08:00
strparser
sunrpc	net/sunrpc: fix useless comparison in proc_do_xprt()	2020-11-08 16:28:25 -05:00
switchdev	net: switchdev: Fixed kerneldoc warning	2020-09-23 17:46:31 -07:00
tipc	tipc: fix memory leak in tipc_topsrv_start()	2020-11-11 14:39:23 -08:00
tls	net/tls: missing received data after fast remote close	2020-11-20 10:25:26 -08:00
unix	networking changes for the 5.10 merge window	2020-10-15 18:42:13 -07:00
vmw_vsock	vsock/virtio: discard packets only when socket is really closed	2020-11-23 16:36:29 -08:00
wimax	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
wireless	cfg80211: regulatory: Fix inconsistent format argument	2020-10-30 10:06:56 +01:00
x25	net: x25: Increase refcnt of "struct x25_neigh" in x25_rx_call_request	2020-11-12 18:01:40 -08:00
xdp	xsk: Fix possible memory leak at socket close	2020-10-29 15:19:56 +01:00
xfrm	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec	2020-11-04 08:12:52 -08:00
compat.c	iov_iter: transparently handle compat iovecs in import_iovec	2020-10-03 00:02:13 -04:00
devres.c	net: devres: rename the release callback of devm_register_netdev()	2020-06-30 15:57:34 -07:00
Kconfig	drop_monitor: Convert to using devlink tracepoint	2020-09-30 18:01:26 -07:00
Makefile	net: move devres helpers into a separate source file	2020-05-23 16:56:17 -07:00
socket.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-10-05 18:40:01 -07:00
sysctl_net.c