Messages in this thread Patch in this message | | | From | Steen Hegelund <> | Subject | [PATCH net-next v4 4/7] net: microchip: sparx5: Adding TC goto action and action checking | Date | Wed, 2 Nov 2022 12:57:34 +0100 |
| |
Add support for a goto action and ensure that a HW offloaded TC flower filter has a valid goto action and that pass and trap actions are not both used in the same filter.
Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com> --- .../microchip/sparx5/sparx5_tc_flower.c | 71 ++++++++++++++++--- 1 file changed, 63 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c index 13bc6bff4c1e..537a85edc954 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c @@ -464,6 +464,61 @@ static int sparx5_tc_use_dissectors(struct flow_cls_offload *fco, return err; } +static int sparx5_tc_flower_action_check(struct vcap_control *vctrl, + struct flow_cls_offload *fco, + struct vcap_admin *admin) +{ + struct flow_rule *rule = flow_cls_offload_flow_rule(fco); + struct flow_action_entry *actent, *last_actent = NULL; + struct flow_action *act = &rule->action; + u64 action_mask = 0; + int idx; + + if (!flow_action_has_entries(act)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, "No actions"); + return -EINVAL; + } + + if (!flow_action_basic_hw_stats_check(act, fco->common.extack)) + return -EOPNOTSUPP; + + flow_action_for_each(idx, actent, act) { + if (action_mask & BIT(actent->id)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "More actions of the same type"); + return -EINVAL; + } + action_mask |= BIT(actent->id); + last_actent = actent; /* Save last action for later check */ + } + + /* Check that last action is a goto */ + if (last_actent->id != FLOW_ACTION_GOTO) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "Last action must be 'goto'"); + return -EINVAL; + } + + /* Check if the goto chain is in the same VCAP instance and lookup */ + if (admin == vcap_find_admin(vctrl, last_actent->chain_index)) + if (vcap_chain_id_to_lookup(admin, fco->common.chain_index) == + vcap_chain_id_to_lookup(admin, last_actent->chain_index)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "Invalid goto chain"); + return -EINVAL; + } + + /* Catch unsupported combinations of actions */ + if (action_mask & BIT(FLOW_ACTION_TRAP) && + action_mask & BIT(FLOW_ACTION_ACCEPT)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "Cannot combine pass and trap action"); + return -EOPNOTSUPP; + } + + return 0; +} + static int sparx5_tc_flower_replace(struct net_device *ndev, struct flow_cls_offload *fco, struct vcap_admin *admin) @@ -475,16 +530,12 @@ static int sparx5_tc_flower_replace(struct net_device *ndev, struct vcap_rule *vrule; int err, idx; - frule = flow_cls_offload_flow_rule(fco); - if (!flow_action_has_entries(&frule->action)) { - NL_SET_ERR_MSG_MOD(fco->common.extack, "No actions"); - return -EINVAL; - } + vctrl = port->sparx5->vcap_ctrl; - if (!flow_action_basic_hw_stats_check(&frule->action, fco->common.extack)) - return -EOPNOTSUPP; + err = sparx5_tc_flower_action_check(vctrl, fco, admin); + if (err) + return err; - vctrl = port->sparx5->vcap_ctrl; vrule = vcap_alloc_rule(vctrl, ndev, fco->common.chain_index, VCAP_USER_TC, fco->common.prio, 0); if (IS_ERR(vrule)) @@ -492,6 +543,7 @@ static int sparx5_tc_flower_replace(struct net_device *ndev, vrule->cookie = fco->cookie; sparx5_tc_use_dissectors(fco, admin, vrule); + frule = flow_cls_offload_flow_rule(fco); flow_action_for_each(idx, act, &frule->action) { switch (act->id) { case FLOW_ACTION_TRAP: @@ -521,6 +573,9 @@ static int sparx5_tc_flower_replace(struct net_device *ndev, if (err) goto out; break; + case FLOW_ACTION_GOTO: + /* Links between VCAPs will be added later */ + break; default: NL_SET_ERR_MSG_MOD(fco->common.extack, "Unsupported TC action"); -- 2.38.1
| |