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net/mlx5: E-switch, Create ingress ACL when needed

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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: 1749c4c51c ("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>
This commit is contained in:
Chris Mi 2024-06-27 21:02:37 +03:00 committed by David S. Miller
parent 5dbf647367
commit b20c2fb454
1 changed files with 29 additions and 8 deletions
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37
drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c
View File

@ -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)
{