mptcp: add mibs counter for ignored incoming options

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commit f73c119463 upstream.

The MPTCP in kernel path manager has some constraints on incoming
addresses announce processing, so that in edge scenarios it can
end-up dropping (ignoring) some of such announces.

The above is not very limiting in practice since such scenarios are
very uncommon and MPTCP will recover due to ADD_ADDR retransmissions.

This patch adds a few MIB counters to account for such drop events
to allow easier introspection of the critical scenarios.

Fixes: f7efc7771e ("mptcp: drop argument port from mptcp_pm_announce_addr")
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Paolo Abeni 2022-02-18 13:35:42 -08:00 • committed by Greg Kroah-Hartman

parent 150d1e06c4

commit f25ae162f4

3 changed files with 10 additions and 2 deletions

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2

net/mptcp/mib.c

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2

net/mptcp/mib.h

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8

net/mptcp/pm.c

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