netdev - [PATCH xfrm-next 04/16] net/mlx5e: Store replay window in XFRM attributes

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Date:   Fri,  2 Dec 2022 22:10:25 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Steffen Klassert <steffen.klassert@...unet.com>
Cc:     Leon Romanovsky <leonro@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Bharat Bhushan <bbhushan2@...vell.com>,
        Raed Salem <raeds@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [PATCH xfrm-next 04/16] net/mlx5e: Store replay window in XFRM attributes

From: Leon Romanovsky <leonro@...dia.com>

As a preparation for future extension of IPsec hardware object to allow
configuration of packet offload mode, extend the XFRM validator to check
replay window values.

Reviewed-by: Raed Salem <raeds@...dia.com>
Reviewed-by: Saeed Mahameed <saeedm@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c | 12 ++++++++++++
 .../net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h |  1 +
 2 files changed, 13 insertions(+)

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 e6411533f911..734b486db5d6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -166,6 +166,7 @@ mlx5e_ipsec_build_accel_xfrm_attrs(struct mlx5e_ipsec_sa_entry *sa_entry,
 		attrs->esn = sa_entry->esn_state.esn;
 		if (sa_entry->esn_state.overlap)
 			attrs->flags |= MLX5_ACCEL_ESP_FLAGS_ESN_STATE_OVERLAP;
+		attrs->replay_window = x->replay_esn->replay_window;
 	}
 
 	/* action */
@@ -257,6 +258,17 @@ static inline int mlx5e_xfrm_validate_state(struct xfrm_state *x)
 		netdev_info(netdev, "Unsupported xfrm offload type\n");
 		return -EINVAL;
 	}
+	if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) {
+		if (x->replay_esn && x->replay_esn->replay_window != 32 &&
+		    x->replay_esn->replay_window != 64 &&
+		    x->replay_esn->replay_window != 128 &&
+		    x->replay_esn->replay_window != 256) {
+			netdev_info(netdev,
+				    "Unsupported replay window size %u\n",
+				    x->replay_esn->replay_window);
+			return -EINVAL;
+		}
+	}
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
index fa052a89c4dd..6fe55675bee9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
@@ -83,6 +83,7 @@ struct mlx5_accel_esp_xfrm_attrs {
 	} daddr;
 
 	u8 is_ipv6;
+	u32 replay_window;
 };
 
 enum mlx5_ipsec_cap {
-- 
2.38.1