linux-kernel - [PATCH net 0/2] bonding: fix LACP negotiation issues in passive mode

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Message-ID: <20250709090344.88242-1-liuhangbin@gmail.com>
Date: Wed,  9 Jul 2025 09:03:42 +0000
From: Hangbin Liu <liuhangbin@...il.com>
To: netdev@...r.kernel.org
Cc: Jay Vosburgh <jv@...sburgh.net>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Nikolay Aleksandrov <razor@...ckwall.org>,
	Simon Horman <horms@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCH net 0/2] bonding: fix LACP negotiation issues in passive mode

This patchset fixes an issue where bonding fails to establish a stable LACP
negotiation when operating in passive mode (lacp_active=off).

In passive mode, the current implementation only replies when the partner's
state changes, which results in LACP timeout and unstable aggregator formation.

With this change, the bond responds to each received LACPDU in passive mode
by setting ntt = true, ensuring timely replies and stable LACP negotiation.

Hangbin Liu (2):
  bonding: update ntt to true in passive mode
  selftests: bonding: add test for passive LACP mode

 drivers/net/bonding/bond_3ad.c                |  6 ++
 .../drivers/net/bonding/bond_passive_lacp.sh  | 21 +++++
 .../drivers/net/bonding/bond_topo_lacp.sh     | 77 +++++++++++++++++++
 3 files changed, 104 insertions(+)
 create mode 100755 tools/testing/selftests/drivers/net/bonding/bond_passive_lacp.sh
 create mode 100644 tools/testing/selftests/drivers/net/bonding/bond_topo_lacp.sh

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2.46.0