mptcp: mib: count MPJ with backup flag

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commit 4dde0d72cc upstream.

Without such counters, it is difficult to easily debug issues with MPJ
not having the backup flags on production servers.

This is not strictly a fix, but it eases to validate the following
patches without requiring to take packet traces, to query ongoing
connections with Netlink with admin permissions, or to guess by looking
at the behaviour of the packet scheduler. Also, the modification is self
contained, isolated, well controlled, and the increments are done just
after others, there from the beginning. It looks then safe, and helpful
to backport this.

Fixes: 4596a2c1b7 ("mptcp: allow creating non-backup subflows")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
[ Conflicts in subflow.c because the context has changed in
  commit b3ea6b272d ("mptcp: consolidate initial ack seq generation")
  which is not in this version. This commit is unrelated to this
  modification. ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Matthieu Baerts (NGI0) 2024-08-09 11:07:54 +02:00 • committed by Greg Kroah-Hartman

parent 3d16add56e

commit dff41c5f69

3 changed files with 10 additions and 0 deletions

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2

net/mptcp/mib.c

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2

net/mptcp/mib.h

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6

net/mptcp/subflow.c

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