mptcp: pm: in-kernel: record fullmesh endp nb

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Instead of iterating over all endpoints, under RCU read lock, just to
check if one of them as the fullmesh flag, we can keep a counter of
fullmesh endpoint, similar to what is done with the other flags.

This counter is now checked, before iterating over all endpoints.

Similar to the other counters, this new one is also exposed. A userspace
app can then know when it is being used in a fullmesh mode, with
potentially (too) many subflows.

Reviewed-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20251101-net-next-mptcp-fm-endp-nb-bind-v1-1-b4166772d6bb@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Matthieu Baerts (NGI0) 2025-11-01 18:56:51 +01:00 • committed by Jakub Kicinski

parent b117befe8a

commit f88191c7f3

4 changed files with 40 additions and 4 deletions

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3

include/uapi/linux/mptcp.h

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38

net/mptcp/pm_kernel.c

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1

net/mptcp/protocol.h

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2

net/mptcp/sockopt.c

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