From 375f51e2b5b7b9a42b3139aea519cbb1bfc5d6ef Mon Sep 17 00:00:00 2001 From: Roi Dayan Date: Tue, 21 Mar 2017 15:59:14 +0200 Subject: [PATCH] net/mlx5: E-Switch, Don't allow changing inline mode when flows are configured Changing the eswitch inline mode can potentially cause already configured flows not to match the policy. E.g. set policy L4, add some L4 rules, set policy to L2 --> bad! Hence we disallow it. Keep track of how many offloaded rules are now set and refuse inline mode changes if this isn't zero. Fixes: bffaa916588e ("net/mlx5: E-Switch, Add control for inline mode") Signed-off-by: Roi Dayan Reviewed-by: Or Gerlitz Signed-off-by: Saeed Mahameed Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx5/core/eswitch.h | 1 + .../net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h index 9227a83a97e3..ad329b1680b4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h @@ -209,6 +209,7 @@ struct mlx5_esw_offload { struct mlx5_eswitch_rep *vport_reps; DECLARE_HASHTABLE(encap_tbl, 8); u8 inline_mode; + u64 num_flows; }; struct mlx5_eswitch { diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c index bfabefe20ac0..307ec6c5fd3b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c @@ -93,6 +93,8 @@ mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw, spec, &flow_act, dest, i); if (IS_ERR(rule)) mlx5_fc_destroy(esw->dev, counter); + else + esw->offloads.num_flows++; return rule; } @@ -108,6 +110,7 @@ mlx5_eswitch_del_offloaded_rule(struct mlx5_eswitch *esw, counter = mlx5_flow_rule_counter(rule); mlx5_del_flow_rules(rule); mlx5_fc_destroy(esw->dev, counter); + esw->offloads.num_flows--; } } @@ -922,6 +925,11 @@ int mlx5_devlink_eswitch_inline_mode_set(struct devlink *devlink, u8 mode) MLX5_CAP_INLINE_MODE_VPORT_CONTEXT) return -EOPNOTSUPP; + if (esw->offloads.num_flows > 0) { + esw_warn(dev, "Can't set inline mode when flows are configured\n"); + return -EOPNOTSUPP; + } + err = esw_inline_mode_from_devlink(mode, &mlx5_mode); if (err) goto out; -- 2.20.1