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mptcp: add the incoming MP_PRIO support

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This patch added the incoming MP_PRIO logic:

Added a flag named mp_prio in struct mptcp_options_received, to mark the
MP_PRIO is received, and save the priority value to struct
mptcp_options_received's backup member. Then invoke
mptcp_pm_mp_prio_received with the receiving subsocket and the backup
value.

In mptcp_pm_mp_prio_received, get the subflow context according the input
subsocket, and change the subflow's backup as the incoming priority value.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Geliang Tang 2021-01-08 16:47:58 -08:00 • committed by Jakub Kicinski
parent 067065422f
commit 40453a5c61
3 changed files with 28 additions and 0 deletions
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8
net/mptcp/pm.c
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@ -207,6 +207,14 @@ void mptcp_pm_rm_addr_received(struct mptcp_sock *msk, u8 rm_id)
spin_unlock_bh(&pm->lock);
}
void mptcp_pm_mp_prio_received(struct sock *sk, u8 bkup)
{
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
pr_debug("subflow->backup=%d, bkup=%d\n", subflow->backup, bkup);
subflow->backup = bkup;
}
/* path manager helpers */
bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,