6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chris Mi <cmi@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
.../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)
{
--
2.43.0
