mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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92d6b3747b
commitf5ce071462upstream. When add_addr_timeout was set to 0, this caused the ADD_ADDR to be retransmitted immediately, which looks like a buggy behaviour. Instead, interpret 0 as "no retransmissions needed". The documentation is updated to explicitly state that setting the timeout to 0 disables retransmission. Fixes:93f323b9cc("mptcp: add a new sysctl add_addr_timeout") Cc: stable@vger.kernel.org Suggested-by: Matthieu Baerts <matttbe@kernel.org> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20250815-net-mptcp-misc-fixes-6-17-rc2-v1-5-521fe9957892@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> [ Before commite4c28e3d5c("mptcp: pm: move generic PM helpers to pm.c"), mptcp_pm_alloc_anno_list() was in pm_netlink.c. The same patch can be applied there without conflicts. ] Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
113 lines
3.3 KiB
ReStructuredText
113 lines
3.3 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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=====================
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MPTCP Sysfs variables
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=====================
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/proc/sys/net/mptcp/* Variables
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===============================
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add_addr_timeout - INTEGER (seconds)
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Set the timeout after which an ADD_ADDR control message will be
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resent to an MPTCP peer that has not acknowledged a previous
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ADD_ADDR message.
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Do not retransmit if set to 0.
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The default value matches TCP_RTO_MAX. This is a per-namespace
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sysctl.
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Default: 120
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allow_join_initial_addr_port - BOOLEAN
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Allow peers to send join requests to the IP address and port number used
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by the initial subflow if the value is 1. This controls a flag that is
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sent to the peer at connection time, and whether such join requests are
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accepted or denied.
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Joins to addresses advertised with ADD_ADDR are not affected by this
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value.
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This is a per-namespace sysctl.
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Default: 1
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available_schedulers - STRING
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Shows the available schedulers choices that are registered. More packet
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schedulers may be available, but not loaded.
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blackhole_timeout - INTEGER (seconds)
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Initial time period in second to disable MPTCP on active MPTCP sockets
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when a MPTCP firewall blackhole issue happens. This time period will
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grow exponentially when more blackhole issues get detected right after
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MPTCP is re-enabled and will reset to the initial value when the
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blackhole issue goes away.
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0 to disable the blackhole detection.
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Default: 3600
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checksum_enabled - BOOLEAN
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Control whether DSS checksum can be enabled.
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DSS checksum can be enabled if the value is nonzero. This is a
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per-namespace sysctl.
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Default: 0
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close_timeout - INTEGER (seconds)
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Set the make-after-break timeout: in absence of any close or
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shutdown syscall, MPTCP sockets will maintain the status
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unchanged for such time, after the last subflow removal, before
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moving to TCP_CLOSE.
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The default value matches TCP_TIMEWAIT_LEN. This is a per-namespace
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sysctl.
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Default: 60
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enabled - BOOLEAN
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Control whether MPTCP sockets can be created.
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MPTCP sockets can be created if the value is 1. This is a
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per-namespace sysctl.
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Default: 1 (enabled)
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pm_type - INTEGER
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Set the default path manager type to use for each new MPTCP
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socket. In-kernel path management will control subflow
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connections and address advertisements according to
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per-namespace values configured over the MPTCP netlink
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API. Userspace path management puts per-MPTCP-connection subflow
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connection decisions and address advertisements under control of
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a privileged userspace program, at the cost of more netlink
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traffic to propagate all of the related events and commands.
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This is a per-namespace sysctl.
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* 0 - In-kernel path manager
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* 1 - Userspace path manager
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Default: 0
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scheduler - STRING
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Select the scheduler of your choice.
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Support for selection of different schedulers. This is a per-namespace
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sysctl.
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Default: "default"
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stale_loss_cnt - INTEGER
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The number of MPTCP-level retransmission intervals with no traffic and
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pending outstanding data on a given subflow required to declare it stale.
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The packet scheduler ignores stale subflows.
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A low stale_loss_cnt value allows for fast active-backup switch-over,
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an high value maximize links utilization on edge scenarios e.g. lossy
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link with high BER or peer pausing the data processing.
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This is a per-namespace sysctl.
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Default: 4
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