[PATCH 6.12] net/mlx5e: Use ip6_dst_lookup instead of ipv6_dst_lookup_flow for MAC init

[PATCH 6.12] net/mlx5e: Use ip6_dst_lookup instead of ipv6_dst_lookup_flow for MAC init

[Gyokhan Kochmarla]

From: Jianbo Liu <jianbol@nvidia.com>

commit e35d7da8dd9e55b37c3e8ab548f6793af0c2ab49 upstream.

Replace ipv6_stub->ipv6_dst_lookup_flow() with ip6_dst_lookup() in
mlx5e_ipsec_init_macs() since IPsec transformations are not needed
during Security Association setup - only basic routing information is
required for nexthop MAC address resolution.

This resolves an issue where XfrmOutNoStates error counter would be
incremented when xfrm policy is configured before xfrm state, as the
IPsec-aware routing function would attempt policy checks during SA
initialization.

Fixes: 71670f766b8f ("net/mlx5e: Support routed networks during IPsec MACs initialization")
Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1765284977-1363052-7-git-send-email-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Gyokhan Kochmarla <gyokhan@amazon.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

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 486f05112f5a..013383dd194a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -348,9 +348,8 @@ static void mlx5e_ipsec_init_macs(struct mlx5e_ipsec_sa_entry *sa_entry,
 		rt_dst_entry = &rt->dst;
 		break;
 	case AF_INET6:
-		rt_dst_entry = ipv6_stub->ipv6_dst_lookup_flow(
-			dev_net(netdev), NULL, &fl6, NULL);
-		if (IS_ERR(rt_dst_entry))
+		if (!IS_ENABLED(CONFIG_IPV6) ||
+		    ip6_dst_lookup(dev_net(netdev), NULL, &rt_dst_entry, &fl6))
 			goto neigh;
 		break;
 	default:
-- 
2.47.3




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Ust-ID: DE 365 538 597

Re: [PATCH 6.12] net/mlx5e: Use ip6_dst_lookup instead of ipv6_dst_lookup_flow for MAC init

[Sasha Levin]

> commit e35d7da8dd9e55b37c3e8ab548f6793af0c2ab49 upstream.

Queued for 6.12.y, thanks.

--
Thanks,
Sasha