net/sfc: do not allow flow rules to refer to VF representors

VF representors do not own dedicated m-ports and thus cannot
be referred to as traffic endpoints in flow items or actions.

Fixes: a62ec90522a6 ("net/sfc: add port representors infrastructure")
Fixes: f55b61cec94a ("net/sfc: support port representor flow item")

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

diff --git a/drivers/net/sfc/sfc_switch.c b/drivers/net/sfc/sfc_switch.c
index a28e861..265a17f 100644 (file)
--- a/drivers/net/sfc/sfc_switch.c
+++ b/drivers/net/sfc/sfc_switch.c
@@ -512,7 +512,7 @@ sfc_mae_clear_switch_port(uint16_t switch_domain_id,
 static int
 sfc_mae_find_switch_port_by_ethdev(uint16_t switch_domain_id,
                                   uint16_t ethdev_port_id,
-                                  efx_mport_sel_t *mport_sel)
+                                  struct sfc_mae_switch_port **switch_port)
 {
        struct sfc_mae_switch_domain *domain;
        struct sfc_mae_switch_port *port;
@@ -528,7 +528,7 @@ sfc_mae_find_switch_port_by_ethdev(uint16_t switch_domain_id,
 
        TAILQ_FOREACH(port, &domain->ports, switch_domain_ports) {
                if (port->ethdev_port_id == ethdev_port_id) {
-                       *mport_sel = port->ethdev_mport;
+                       *switch_port = port;
                        return 0;
                }
        }
@@ -541,11 +541,27 @@ sfc_mae_switch_port_by_ethdev(uint16_t switch_domain_id,
                              uint16_t ethdev_port_id,
                              efx_mport_sel_t *mport_sel)
 {
+       struct sfc_mae_switch_port *port;
        int rc;
 
        rte_spinlock_lock(&sfc_mae_switch.lock);
        rc = sfc_mae_find_switch_port_by_ethdev(switch_domain_id,
-                                               ethdev_port_id, mport_sel);
+                                               ethdev_port_id, &port);
+       if (rc != 0)
+               goto unlock;
+
+       if (port->type != SFC_MAE_SWITCH_PORT_INDEPENDENT) {
+               /*
+                * The ethdev is a "VF representor". It does not own
+                * a dedicated m-port suitable for use in flow rules.
+                */
+               rc = ENOTSUP;
+               goto unlock;
+       }
+
+       *mport_sel = port->ethdev_mport;
+
+unlock:
        rte_spinlock_unlock(&sfc_mae_switch.lock);
 
        return rc;