diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2024-09-11 15:57:53 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-09-11 15:57:53 -0700 |
| commit | 9ee926213fc814d2c27fc67257ba5cc00a0ec910 (patch) | |
| tree | b2b59e53ce7fee633efeb019b4903cba0b649ac8 /Documentation | |
| parent | 8b5d2e5cf04f61af75c751cc8fcb1886f8bcef5a (diff) | |
| parent | 27069e7cb3d1cea9377069266acf19b9cc5ad0ae (diff) | |
Merge branch 'mptcp-fallback-to-tcp-after-3-mpc-drop-cache'
Matthieu Baerts says:
====================
mptcp: fallback to TCP after 3 MPC drop + cache
The SYN + MPTCP_CAPABLE packets could be explicitly dropped by firewalls
somewhere in the network, e.g. if they decide to drop packets based on
the TCP options, instead of stripping them off.
The idea of this series is to fallback to TCP after 3 SYN+MPC drop
(patch 2). If the connection succeeds after the fallback, it very likely
means a blackhole has been detected. In this case (patch 3), MPTCP can
be disabled for a certain period of time, 1h by default. If after this
period, MPTCP is still blocked, the period is doubled. This technique is
inspired by the one used by TCP FastOpen.
This should help applications which want to use MPTCP by default on the
client side if available.
====================
Link: https://patch.msgid.link/20240909-net-next-mptcp-fallback-x-mpc-v1-0-da7ebb4cd2a3@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/mptcp-sysctl.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/networking/mptcp-sysctl.rst b/Documentation/networking/mptcp-sysctl.rst index fd514bba8c43..95598c21fc8e 100644 --- a/Documentation/networking/mptcp-sysctl.rst +++ b/Documentation/networking/mptcp-sysctl.rst @@ -34,6 +34,17 @@ available_schedulers - STRING Shows the available schedulers choices that are registered. More packet schedulers may be available, but not loaded. +blackhole_timeout - INTEGER (seconds) + Initial time period in second to disable MPTCP on active MPTCP sockets + when a MPTCP firewall blackhole issue happens. This time period will + grow exponentially when more blackhole issues get detected right after + MPTCP is re-enabled and will reset to the initial value when the + blackhole issue goes away. + + 0 to disable the blackhole detection. + + Default: 3600 + checksum_enabled - BOOLEAN Control whether DSS checksum can be enabled. |