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5684ab1a0e
linux/net
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Paolo Abeni 5684ab1a0e mptcp: give rcvlowat some love 
The MPTCP protocol allow setting sk_rcvlowat, but the value there
is currently ignored.

Additionally, the default subflows sk_rcvlowat basically disables per
subflow delayed ack: the MPTCP protocol move the incoming data from the
subflows into the msk socket as soon as the TCP stacks invokes the subflow
data_ready callback. Later, when __tcp_ack_snd_check() takes action,
the subflow-level copied_seq matches rcv_nxt, and that mandate for an
immediate ack.

Let the mptcp receive path be aware of such threshold, explicitly tracking
the amount of data available to be ready and checking vs sk_rcvlowat in
mptcp_poll() and before waking-up readers.

Additionally implement the set_rcvlowat() callback, to properly handle
the rcvbuf auto-tuning on sk_rcvlowat changes.

Finally to properly handle delayed ack, force the subflow level threshold
to 0 and instead explicitly ask for an immediate ack when the msk level th
is not reached.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-5-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
..
6lowpan
9p net: annotate data-races around sock->ops 2023-08-09 15:32:43 -07:00
802
8021q Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
appletalk appletalk: remove special handling code for ipddp 2023-10-13 17:59:32 -07:00
atm net: atm: Remove redundant check. 2023-10-23 08:45:25 +01:00
ax25 net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-24 10:51:39 -07:00
bluetooth Bluetooth: hci_sync: Fix Opcode prints in bt_dev_dbg/err 2023-10-23 11:05:32 -07:00
bpf bpf: Prevent inlining of bpf_fentry_test7() 2023-08-30 08:36:17 +02:00
bpfilter
bridge netfilter: bridge: convert br_netfilter to NF_DROP_REASON 2023-10-18 10:26:43 +02:00
caif sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-12 17:07:34 -07:00
ceph Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-19 13:29:01 -07:00
core net: dsa: Use conduit and user terms 2023-10-24 13:08:14 -07:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp tcp: record last received ipv6 flowlabel 2023-10-10 10:02:59 +02:00
devlink devlink: remove netlink small_ops 2023-10-23 16:16:51 -07:00
dns_resolver
dsa net: dsa: Rename IFLA_DSA_MASTER to IFLA_DSA_CONDUIT 2023-10-24 13:08:14 -07:00
ethernet
ethtool ethtool: untangle the linkmode and ethtool headers 2023-10-20 12:47:33 +01:00
handshake handshake: Fix sign of key_serial_t fields 2023-10-02 12:34:21 -07:00
hsr net: hsr: Add __packed to struct hsr_sup_tlv. 2023-09-18 08:26:19 +01:00
ieee802154 sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
ife
ipv4 tcp: add TCPI_OPT_USEC_TS 2023-10-23 09:35:01 +01:00
ipv6 tcp: add support for usec resolution in TCP TS values 2023-10-23 09:35:01 +01:00
iucv
kcm kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg(). 2023-09-14 10:43:51 +02:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-05 13:16:47 -07:00
l3mdev
lapb
llc net/llc/llc_conn.c: fix 4 instances of -Wmissing-variable-declarations 2023-08-09 15:34:28 -07:00
mac80211 wifi: mac80211: fix error path key leak 2023-10-11 16:36:14 +02:00
mac802154 Core WPAN changes: 2023-06-24 15:41:46 -07:00
mctp mctp: perform route lookups under a RCU read-side lock 2023-10-10 19:43:22 -07:00
mpls networking: Update to register_net_sysctl_sz 2023-08-15 15:26:18 -07:00
mptcp mptcp: give rcvlowat some love 2023-10-25 12:23:34 -07:00
ncsi ncsi: Propagate carrier gain/loss events to the NCSI controller 2023-09-18 07:06:05 +01:00
netfilter tcp: introduce tcp_clock_ms() 2023-10-23 09:35:01 +01:00
netlabel netlabel: Remove unused declaration netlbl_cipsov4_doi_free() 2023-08-02 12:28:22 -07:00
netlink genetlink: don't merge dumpit split op for different cmds into single iter 2023-10-23 16:11:53 -07:00
netrom net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
nfc nfc: nci: fix possible NULL pointer dereference in send_acknowledge() 2023-10-16 17:34:53 -07:00
nsh
openvswitch net: openvswitch: Annotate struct mask_array with __counted_by 2023-10-17 13:56:03 +02:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-12 17:07:34 -07:00
phonet sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
psample
qrtr net: qrtr: Handle IPCR control port format of older targets 2023-07-17 09:02:30 +01:00
rds net: prevent address rewrite in kernel_bind() 2023-10-01 19:31:29 +01:00
rfkill net: rfkill: reduce data->mtx scope in rfkill_fop_open 2023-10-11 16:55:10 +02:00
rose net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
rxrpc Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
sched sched: act_ct: switch to per-action label counting 2023-10-25 10:24:04 +01:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-05 13:16:47 -07:00
smc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-19 13:29:01 -07:00
strparser
sunrpc SUNRPC/TLS: Lock the lower_xprt during the tls handshake 2023-09-27 15:16:40 -04:00
switchdev net: switchdev: Add a helper to replay objects on a bridge port 2023-07-21 08:54:03 +01:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-05 13:16:47 -07:00
tls tls: don't reset prot->aad_size and prot->tail_size for TLS_HW 2023-10-23 10:15:09 -07:00
unix bpf: Implement cgroup sockaddr hooks for unix sockets 2023-10-11 17:27:47 -07:00
vmw_vsock vsock: enable setting SO_ZEROCOPY 2023-10-15 13:19:42 +01:00
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-19 13:29:01 -07:00
x25 net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-12 17:07:34 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-10-19 13:29:01 -07:00
compat.c
devres.c
Kconfig net: add skb_segment kunit test 2023-10-11 10:39:01 +01:00
Kconfig.debug
Makefile
socket.c net: prevent address rewrite in kernel_bind() 2023-10-01 19:31:29 +01:00
sysctl_net.c sysctl: Add size to register_net_sysctl function 2023-08-15 15:26:17 -07:00