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mptcp: pm: send ACK on an active subflow

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Taking the first one on the list doesn't work in some cases, e.g. if the
initial subflow is being removed. Pick another one instead of not
sending anything.

Fixes: 84dfe3677a ("mptcp: send out dedicated ADD_ADDR packet")
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>
This commit is contained in:
Matthieu Baerts (NGI0) 2024-08-28 08:14:27 +02:00 • committed by Paolo Abeni
parent 5f94b08c00
commit c07cc3ed89
1 changed files with 6 additions and 3 deletions
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9
net/mptcp/pm_netlink.c
View file

@ -765,9 +765,12 @@ void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk)
!mptcp_pm_should_rm_signal(msk))
return;
subflow = list_first_entry_or_null(&msk->conn_list, typeof(*subflow), node);
if (subflow)
mptcp_pm_send_ack(msk, subflow, false, false);
mptcp_for_each_subflow(msk, subflow) {
if (__mptcp_subflow_active(subflow)) {
mptcp_pm_send_ack(msk, subflow, false, false);
break;
}
}
}
int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,