6.1-stable review patch. If anyone has any objections, please let me know.
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From: Chris Mi cmi@nvidia.com
[ Upstream commit b20c2fb45470d0c7a603613c9cfa5d45720e17f2 ]
Currently, ingress acl is used for three features. It is created only when vport metadata match and prio tag are enabled. But active-backup lag mode also uses it. It is independent of vport metadata match and prio tag. And vport metadata match can be disabled using the following devlink command:
# devlink dev param set pci/0000:08:00.0 name esw_port_metadata \ value false cmode runtime
If ingress acl is not created, will hit panic when creating drop rule for active-backup lag mode. If always create it, there will be about 5% performance degradation.
Fix it by creating ingress acl when needed. If esw_port_metadata is true, ingress acl exists, then create drop rule using existing ingress acl. If esw_port_metadata is false, create ingress acl and then create drop rule.
Fixes: 1749c4c51c16 ("net/mlx5: E-switch, add drop rule support to ingress ACL") Signed-off-by: Chris Mi cmi@nvidia.com Signed-off-by: Tariq Toukan tariqt@nvidia.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- .../mellanox/mlx5/core/esw/acl/ingress_ofld.c | 37 +++++++++++++++---- 1 file changed, 29 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c index db578a7e7008a..59fb31201c35e 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c @@ -6,6 +6,9 @@ #include "helper.h" #include "ofld.h"
+static int +acl_ingress_ofld_setup(struct mlx5_eswitch *esw, struct mlx5_vport *vport); + static bool esw_acl_ingress_prio_tag_enabled(struct mlx5_eswitch *esw, const struct mlx5_vport *vport) @@ -123,18 +126,31 @@ static int esw_acl_ingress_src_port_drop_create(struct mlx5_eswitch *esw, { struct mlx5_flow_act flow_act = {}; struct mlx5_flow_handle *flow_rule; + bool created = false; int err = 0;
+ if (!vport->ingress.acl) { + err = acl_ingress_ofld_setup(esw, vport); + if (err) + return err; + created = true; + } + flow_act.action = MLX5_FLOW_CONTEXT_ACTION_DROP; flow_act.fg = vport->ingress.offloads.drop_grp; flow_rule = mlx5_add_flow_rules(vport->ingress.acl, NULL, &flow_act, NULL, 0); if (IS_ERR(flow_rule)) { err = PTR_ERR(flow_rule); - goto out; + goto err_out; }
vport->ingress.offloads.drop_rule = flow_rule; -out: + + return 0; +err_out: + /* Only destroy ingress acl created in this function. */ + if (created) + esw_acl_ingress_ofld_cleanup(esw, vport); return err; }
@@ -299,16 +315,12 @@ static void esw_acl_ingress_ofld_groups_destroy(struct mlx5_vport *vport) } }
-int esw_acl_ingress_ofld_setup(struct mlx5_eswitch *esw, - struct mlx5_vport *vport) +static int +acl_ingress_ofld_setup(struct mlx5_eswitch *esw, struct mlx5_vport *vport) { int num_ftes = 0; int err;
- if (!mlx5_eswitch_vport_match_metadata_enabled(esw) && - !esw_acl_ingress_prio_tag_enabled(esw, vport)) - return 0; - esw_acl_ingress_allow_rule_destroy(vport);
if (mlx5_eswitch_vport_match_metadata_enabled(esw)) @@ -347,6 +359,15 @@ int esw_acl_ingress_ofld_setup(struct mlx5_eswitch *esw, return err; }
+int esw_acl_ingress_ofld_setup(struct mlx5_eswitch *esw, struct mlx5_vport *vport) +{ + if (!mlx5_eswitch_vport_match_metadata_enabled(esw) && + !esw_acl_ingress_prio_tag_enabled(esw, vport)) + return 0; + + return acl_ingress_ofld_setup(esw, vport); +} + void esw_acl_ingress_ofld_cleanup(struct mlx5_eswitch *esw, struct mlx5_vport *vport) {