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mptcp: pm: send ACK on non-stale subflows

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If the subflow is considered as "staled", it is better to avoid it to
send an ACK carrying an ADD_ADDR or RM_ADDR. Another subflow, if any,
will then be selected.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20241021-net-next-mptcp-misc-6-13-v1-1-1ef02746504a@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Matthieu Baerts (NGI0) 2024-10-21 17:14:03 +02:00 committed by Jakub Kicinski
parent fbb26ecc55
commit a42f307664
1 changed files with 11 additions and 3 deletions
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14
net/mptcp/pm_netlink.c
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@ -781,7 +781,7 @@ bool mptcp_pm_nl_is_init_remote_addr(struct mptcp_sock *msk,
void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk)
{
struct mptcp_subflow_context *subflow;
struct mptcp_subflow_context *subflow, *alt = NULL;
msk_owned_by_me(msk);
lockdep_assert_held(&msk->pm.lock);
@ -792,10 +792,18 @@ void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk)
mptcp_for_each_subflow(msk, subflow) {
if (__mptcp_subflow_active(subflow)) {
mptcp_pm_send_ack(msk, subflow, false, false);
break;
if (!subflow->stale) {
mptcp_pm_send_ack(msk, subflow, false, false);
return;
}
if (!alt)
alt = subflow;
}
}
if (alt)
mptcp_pm_send_ack(msk, alt, false, false);
}
int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,