netdev - [PATCH ipsec-next 1/2] xfrm: Support ESN context update to hardware for TX

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Message-ID: <874f965d786606b0b4351c976f50271349f68b03.1734611621.git.leon@kernel.org>
Date: Thu, 19 Dec 2024 14:37:29 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Steffen Klassert <steffen.klassert@...unet.com>
Cc: Jianbo Liu <jianbol@...dia.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Eric Dumazet <edumazet@...gle.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Jakub Kicinski <kuba@...nel.org>,
	Jonathan Corbet <corbet@....net>,
	linux-doc@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>,
	Potnuri Bharat Teja <bharat@...lsio.com>,
	Saeed Mahameed <saeedm@...dia.com>,
	Tariq Toukan <tariqt@...dia.com>
Subject: [PATCH ipsec-next 1/2] xfrm: Support ESN context update to hardware for TX

From: Jianbo Liu <jianbol@...dia.com>

Previously xfrm_dev_state_advance_esn() was added for RX only. But
it's possible that ESN context also need to be synced to hardware for
TX, so call it for outbound in this patch.

Signed-off-by: Jianbo Liu <jianbol@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 Documentation/networking/xfrm_device.rst                 | 3 ++-
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c          | 3 +++
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c | 3 +++
 net/xfrm/xfrm_replay.c                                   | 1 +
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Documentation/networking/xfrm_device.rst b/Documentation/networking/xfrm_device.rst
index bfea9d8579ed..66f6e9a9b59a 100644
--- a/Documentation/networking/xfrm_device.rst
+++ b/Documentation/networking/xfrm_device.rst
@@ -169,7 +169,8 @@ the stack in xfrm_input().
 
 	hand the packet to napi_gro_receive() as usual
 
-In ESN mode, xdo_dev_state_advance_esn() is called from xfrm_replay_advance_esn().
+In ESN mode, xdo_dev_state_advance_esn() is called from
+xfrm_replay_advance_esn() for RX, and xfrm_replay_overflow_offload_esn for TX.
 Driver will check packet seq number and update HW ESN state machine if needed.
 
 Packet offload mode:
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index bc3af0054406..e56e4f238795 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -6559,6 +6559,9 @@ static void cxgb4_advance_esn_state(struct xfrm_state *x)
 {
 	struct adapter *adap = netdev2adap(x->xso.dev);
 
+	if (x->xso.dir != XFRM_DEV_OFFLOAD_IN)
+		return;
+
 	if (!mutex_trylock(&uld_mutex)) {
 		dev_dbg(adap->pdev_dev,
 			"crypto uld critical resource is under use\n");
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
index ca92e518be76..3dd4f2492090 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -980,6 +980,9 @@ static void mlx5e_xfrm_advance_esn_state(struct xfrm_state *x)
 	struct mlx5e_ipsec_sa_entry *sa_entry_shadow;
 	bool need_update;
 
+	if (x->xso.dir != XFRM_DEV_OFFLOAD_IN)
+		return;
+
 	need_update = mlx5e_ipsec_update_esn_state(sa_entry);
 	if (!need_update)
 		return;
diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index bc56c6305725..e500aebbad22 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -729,6 +729,7 @@ static int xfrm_replay_overflow_offload_esn(struct xfrm_state *x, struct sk_buff
 		}
 
 		replay_esn->oseq = oseq;
+		xfrm_dev_state_advance_esn(x);
 
 		if (xfrm_aevent_is_on(net))
 			xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
-- 
2.47.0