1 .. SPDX-License-Identifier: GPL-2.0
7 /proc/sys/net/mptcp/* Variables
8 ===============================
10 add_addr_timeout - INTEGER (seconds)
11 Set the timeout after which an ADD_ADDR control message will be
12 resent to an MPTCP peer that has not acknowledged a previous
15 The default value matches TCP_RTO_MAX. This is a per-namespace
20 allow_join_initial_addr_port - BOOLEAN
21 Allow peers to send join requests to the IP address and port number used
22 by the initial subflow if the value is 1. This controls a flag that is
23 sent to the peer at connection time, and whether such join requests are
26 Joins to addresses advertised with ADD_ADDR are not affected by this
29 This is a per-namespace sysctl.
33 available_schedulers - STRING
34 Shows the available schedulers choices that are registered. More packet
35 schedulers may be available, but not loaded.
37 blackhole_timeout - INTEGER (seconds)
38 Initial time period in second to disable MPTCP on active MPTCP sockets
39 when a MPTCP firewall blackhole issue happens. This time period will
40 grow exponentially when more blackhole issues get detected right after
41 MPTCP is re-enabled and will reset to the initial value when the
42 blackhole issue goes away.
44 0 to disable the blackhole detection.
48 checksum_enabled - BOOLEAN
49 Control whether DSS checksum can be enabled.
51 DSS checksum can be enabled if the value is nonzero. This is a
56 close_timeout - INTEGER (seconds)
57 Set the make-after-break timeout: in absence of any close or
58 shutdown syscall, MPTCP sockets will maintain the status
59 unchanged for such time, after the last subflow removal, before
62 The default value matches TCP_TIMEWAIT_LEN. This is a per-namespace
68 Control whether MPTCP sockets can be created.
70 MPTCP sockets can be created if the value is 1. This is a
76 Set the default path manager type to use for each new MPTCP
77 socket. In-kernel path management will control subflow
78 connections and address advertisements according to
79 per-namespace values configured over the MPTCP netlink
80 API. Userspace path management puts per-MPTCP-connection subflow
81 connection decisions and address advertisements under control of
82 a privileged userspace program, at the cost of more netlink
83 traffic to propagate all of the related events and commands.
85 This is a per-namespace sysctl.
87 * 0 - In-kernel path manager
88 * 1 - Userspace path manager
93 Select the scheduler of your choice.
95 Support for selection of different schedulers. This is a per-namespace
100 stale_loss_cnt - INTEGER
101 The number of MPTCP-level retransmission intervals with no traffic and
102 pending outstanding data on a given subflow required to declare it stale.
103 The packet scheduler ignores stale subflows.
104 A low stale_loss_cnt value allows for fast active-backup switch-over,
105 an high value maximize links utilization on edge scenarios e.g. lossy
106 link with high BER or peer pausing the data processing.
108 This is a per-namespace sysctl.