Merge branch 'mlxsw-Add-tunnel-devlink-trap-support'

Ido Schimmel says:

====================
mlxsw: Add tunnel devlink-trap support

This patch set from Amit adds support in mlxsw for tunnel traps and a
few additional layer 3 traps that can report drops and exceptions via
devlink-trap.

These traps allow the user to more quickly diagnose problems relating to
tunnel decapsulation errors, such as packet being too short to
decapsulate or a packet containing wrong GRE key in its GRE header.

Patch set overview:

Patches #1-#4 add three additional layer 3 traps. Two of which are
mlxsw-specific as they relate to hardware-specific errors. The patches
include documentation of each trap and selftests.

Patches #5-#8 are preparations. They ensure that the correct ECN bits
are set in the outer header during IPinIP encapsulation and that packets
with an invalid ECN combination in underlay and overlay are trapped to
the kernel and not decapsulated in hardware.

Patches #9-#15 add support for two tunnel related traps. Each trap is
documented and selftested using both VXLAN and IPinIP tunnels, if
applicable.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/devlink/devlink-trap.rst

@@ -223,6 +223,21 @@ be added to the following table:
    * - ``ipv6_lpm_miss``
      - ``exception``
      - Traps unicast IPv6 packets that did not match any route
+   * - ``non_routable_packet``
+     - ``drop``
+     - Traps packets that the device decided to drop because they are not
+       supposed to be routed. For example, IGMP queries can be flooded by the
+       device in layer 2 and reach the router. Such packets should not be
+       routed and instead dropped
+   * - ``decap_error``
+     - ``exception``
+     - Traps NVE and IPinIP packets that the device decided to drop because of
+       failure during decapsulation (e.g., packet being too short, reserved
+       bits set in VXLAN header)
+   * - ``overlay_smac_is_mc``
+     - ``drop``
+     - Traps NVE packets that the device decided to drop because their overlay
+       source MAC is multicast
 
 Driver-specific Packet Traps
 ============================
@@ -234,6 +249,7 @@ links to the description of driver-specific traps registered by various device
 drivers:
 
   * :doc:`netdevsim`
+  * :doc:`mlxsw`
 
 Generic Packet Trap Groups
 ==========================
@@ -258,6 +274,9 @@ narrow. The description of these groups must be added to the following table:
    * - ``buffer_drops``
      - Contains packet traps for packets that were dropped by the device due to
        an enqueue decision
+   * - ``tunnel_drops``
+     - Contains packet traps for packets that were dropped by the device during
+       tunnel encapsulation / decapsulation
 
 Testing
 =======

Documentation/networking/devlink/mlxsw.rst

@@ -57,3 +57,25 @@ The ``mlxsw`` driver reports the following versions
    * - ``fw.version``
      - running
      - Three digit firmware version
+
+Driver-specific Traps
+=====================
+
+.. list-table:: List of Driver-specific Traps Registered by ``mlxsw``
+   :widths: 5 5 90
+
+   * - Name
+     - Type
+     - Description
+   * - ``irif_disabled``
+     - ``drop``
+     - Traps packets that the device decided to drop because they need to be
+       routed from a disabled router interface (RIF). This can happen during
+       RIF dismantle, when the RIF is first disabled before being removed
+       completely
+   * - ``erif_disabled``
+     - ``drop``
+     - Traps packets that the device decided to drop because they need to be
+       routed through a disabled router interface (RIF). This can happen during
+       RIF dismantle, when the RIF is first disabled before being removed
+       completely

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -5513,6 +5513,7 @@ enum mlxsw_reg_htgt_discard_trap_group {
 	MLXSW_REG_HTGT_DISCARD_TRAP_GROUP_BASE = MLXSW_REG_HTGT_TRAP_GROUP_MAX,
 	MLXSW_REG_HTGT_TRAP_GROUP_SP_L2_DISCARDS,
 	MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_DISCARDS,
+	MLXSW_REG_HTGT_TRAP_GROUP_SP_TUNNEL_DISCARDS,
 };
 
 /* reg_htgt_trap_group
@@ -10140,6 +10141,92 @@ static inline void mlxsw_reg_tigcr_pack(char *payload, bool ttlc, u8 ttl_uc)
 	mlxsw_reg_tigcr_ttl_uc_set(payload, ttl_uc);
 }
 
+/* TIEEM - Tunneling IPinIP Encapsulation ECN Mapping Register
+ * -----------------------------------------------------------
+ * The TIEEM register maps ECN of the IP header at the ingress to the
+ * encapsulation to the ECN of the underlay network.
+ */
+#define MLXSW_REG_TIEEM_ID 0xA812
+#define MLXSW_REG_TIEEM_LEN 0x0C
+
+MLXSW_REG_DEFINE(tieem, MLXSW_REG_TIEEM_ID, MLXSW_REG_TIEEM_LEN);
+
+/* reg_tieem_overlay_ecn
+ * ECN of the IP header in the overlay network.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, tieem, overlay_ecn, 0x04, 24, 2);
+
+/* reg_tineem_underlay_ecn
+ * ECN of the IP header in the underlay network.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, tieem, underlay_ecn, 0x04, 16, 2);
+
+static inline void mlxsw_reg_tieem_pack(char *payload, u8 overlay_ecn,
+					u8 underlay_ecn)
+{
+	MLXSW_REG_ZERO(tieem, payload);
+	mlxsw_reg_tieem_overlay_ecn_set(payload, overlay_ecn);
+	mlxsw_reg_tieem_underlay_ecn_set(payload, underlay_ecn);
+}
+
+/* TIDEM - Tunneling IPinIP Decapsulation ECN Mapping Register
+ * -----------------------------------------------------------
+ * The TIDEM register configures the actions that are done in the
+ * decapsulation.
+ */
+#define MLXSW_REG_TIDEM_ID 0xA813
+#define MLXSW_REG_TIDEM_LEN 0x0C
+
+MLXSW_REG_DEFINE(tidem, MLXSW_REG_TIDEM_ID, MLXSW_REG_TIDEM_LEN);
+
+/* reg_tidem_underlay_ecn
+ * ECN field of the IP header in the underlay network.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, tidem, underlay_ecn, 0x04, 24, 2);
+
+/* reg_tidem_overlay_ecn
+ * ECN field of the IP header in the overlay network.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, tidem, overlay_ecn, 0x04, 16, 2);
+
+/* reg_tidem_eip_ecn
+ * Egress IP ECN. ECN field of the IP header of the packet which goes out
+ * from the decapsulation.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, tidem, eip_ecn, 0x04, 8, 2);
+
+/* reg_tidem_trap_en
+ * Trap enable:
+ * 0 - No trap due to decap ECN
+ * 1 - Trap enable with trap_id
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, tidem, trap_en, 0x08, 28, 4);
+
+/* reg_tidem_trap_id
+ * Trap ID. Either DECAP_ECN0 or DECAP_ECN1.
+ * Reserved when trap_en is '0'.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, tidem, trap_id, 0x08, 0, 9);
+
+static inline void mlxsw_reg_tidem_pack(char *payload, u8 underlay_ecn,
+					u8 overlay_ecn, u8 eip_ecn,
+					bool trap_en, u16 trap_id)
+{
+	MLXSW_REG_ZERO(tidem, payload);
+	mlxsw_reg_tidem_underlay_ecn_set(payload, underlay_ecn);
+	mlxsw_reg_tidem_overlay_ecn_set(payload, overlay_ecn);
+	mlxsw_reg_tidem_eip_ecn_set(payload, eip_ecn);
+	mlxsw_reg_tidem_trap_en_set(payload, trap_en);
+	mlxsw_reg_tidem_trap_id_set(payload, trap_id);
+}
+
 /* SBPR - Shared Buffer Pools Register
  * -----------------------------------
  * The SBPR configures and retrieves the shared buffer pools and configuration.
@@ -10684,6 +10771,8 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
 	MLXSW_REG(tndem),
 	MLXSW_REG(tnpc),
 	MLXSW_REG(tigcr),
+	MLXSW_REG(tieem),
+	MLXSW_REG(tidem),
 	MLXSW_REG(sbpr),
 	MLXSW_REG(sbcm),
 	MLXSW_REG(sbpm),

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -4538,8 +4538,6 @@ static const struct mlxsw_listener mlxsw_sp_listener[] = {
 			  false),
 	MLXSW_SP_RXL_MARK(ROUTER_ALERT_IPV4, TRAP_TO_CPU, ROUTER_EXP, false),
 	MLXSW_SP_RXL_MARK(ROUTER_ALERT_IPV6, TRAP_TO_CPU, ROUTER_EXP, false),
-	MLXSW_SP_RXL_MARK(IPIP_DECAP_ERROR, TRAP_TO_CPU, ROUTER_EXP, false),
-	MLXSW_SP_RXL_MARK(DECAP_ECN0, TRAP_TO_CPU, ROUTER_EXP, false),
 	MLXSW_SP_RXL_MARK(IPV4_VRRP, TRAP_TO_CPU, VRRP, false),
 	MLXSW_SP_RXL_MARK(IPV6_VRRP, TRAP_TO_CPU, VRRP, false),
 	MLXSW_SP_RXL_NO_MARK(DISCARD_ING_ROUTER_SIP_CLASS_E, FORWARD,

drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c

@@ -3,8 +3,10 @@
 
 #include <net/ip_tunnels.h>
 #include <net/ip6_tunnel.h>
+#include <net/inet_ecn.h>
 
 #include "spectrum_ipip.h"
+#include "reg.h"
 
 struct ip_tunnel_parm
 mlxsw_sp_ipip_netdev_parms4(const struct net_device *ol_dev)
@@ -338,3 +340,61 @@ static const struct mlxsw_sp_ipip_ops mlxsw_sp_ipip_gre4_ops = {
 const struct mlxsw_sp_ipip_ops *mlxsw_sp_ipip_ops_arr[] = {
 	[MLXSW_SP_IPIP_TYPE_GRE4] = &mlxsw_sp_ipip_gre4_ops,
 };
+
+static int mlxsw_sp_ipip_ecn_encap_init_one(struct mlxsw_sp *mlxsw_sp,
+					    u8 inner_ecn, u8 outer_ecn)
+{
+	char tieem_pl[MLXSW_REG_TIEEM_LEN];
+
+	mlxsw_reg_tieem_pack(tieem_pl, inner_ecn, outer_ecn);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tieem), tieem_pl);
+}
+
+int mlxsw_sp_ipip_ecn_encap_init(struct mlxsw_sp *mlxsw_sp)
+{
+	int i;
+
+	/* Iterate over inner ECN values */
+	for (i = INET_ECN_NOT_ECT; i <= INET_ECN_CE; i++) {
+		u8 outer_ecn = INET_ECN_encapsulate(0, i);
+		int err;
+
+		err = mlxsw_sp_ipip_ecn_encap_init_one(mlxsw_sp, i, outer_ecn);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int mlxsw_sp_ipip_ecn_decap_init_one(struct mlxsw_sp *mlxsw_sp,
+					    u8 inner_ecn, u8 outer_ecn)
+{
+	char tidem_pl[MLXSW_REG_TIDEM_LEN];
+	bool trap_en, set_ce = false;
+	u8 new_inner_ecn;
+
+	trap_en = __INET_ECN_decapsulate(outer_ecn, inner_ecn, &set_ce);
+	new_inner_ecn = set_ce ? INET_ECN_CE : inner_ecn;
+
+	mlxsw_reg_tidem_pack(tidem_pl, outer_ecn, inner_ecn, new_inner_ecn,
+			     trap_en, trap_en ? MLXSW_TRAP_ID_DECAP_ECN0 : 0);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tidem), tidem_pl);
+}
+
+int mlxsw_sp_ipip_ecn_decap_init(struct mlxsw_sp *mlxsw_sp)
+{
+	int i, j, err;
+
+	/* Iterate over inner ECN values */
+	for (i = INET_ECN_NOT_ECT; i <= INET_ECN_CE; i++) {
+		/* Iterate over outer ECN values */
+		for (j = INET_ECN_NOT_ECT; j <= INET_ECN_CE; j++) {
+			err = mlxsw_sp_ipip_ecn_decap_init_one(mlxsw_sp, i, j);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -7791,8 +7791,18 @@ mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp)
 
 static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp)
 {
+	int err;
+
 	mlxsw_sp->router->ipip_ops_arr = mlxsw_sp_ipip_ops_arr;
 	INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list);
+
+	err = mlxsw_sp_ipip_ecn_encap_init(mlxsw_sp);
+	if (err)
+		return err;
+	err = mlxsw_sp_ipip_ecn_decap_init(mlxsw_sp);
+	if (err)
+		return err;
+
 	return mlxsw_sp_ipip_config_tigcr(mlxsw_sp);
 }
 

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h

@@ -104,4 +104,7 @@ static inline bool mlxsw_sp_l3addr_eq(const union mlxsw_sp_l3addr *addr1,
 	return !memcmp(addr1, addr2, sizeof(*addr1));
 }
 
+int mlxsw_sp_ipip_ecn_encap_init(struct mlxsw_sp *mlxsw_sp);
+int mlxsw_sp_ipip_ecn_decap_init(struct mlxsw_sp *mlxsw_sp);
+
 #endif /* _MLXSW_ROUTER_H_*/

drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c

@@ -9,6 +9,20 @@
 #include "reg.h"
 #include "spectrum.h"
 
+/* All driver-specific traps must be documented in
+ * Documentation/networking/devlink/mlxsw.rst
+ */
+enum {
+	DEVLINK_MLXSW_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
+	DEVLINK_MLXSW_TRAP_ID_IRIF_DISABLED,
+	DEVLINK_MLXSW_TRAP_ID_ERIF_DISABLED,
+};
+
+#define DEVLINK_MLXSW_TRAP_NAME_IRIF_DISABLED \
+	"irif_disabled"
+#define DEVLINK_MLXSW_TRAP_NAME_ERIF_DISABLED \
+	"erif_disabled"
+
 #define MLXSW_SP_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
 
 static void mlxsw_sp_rx_drop_listener(struct sk_buff *skb, u8 local_port,
@@ -21,6 +35,12 @@ static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port,
 			     DEVLINK_TRAP_GROUP_GENERIC(_group_id),	      \
 			     MLXSW_SP_TRAP_METADATA)
 
+#define MLXSW_SP_TRAP_DRIVER_DROP(_id, _group_id)			      \
+	DEVLINK_TRAP_DRIVER(DROP, DROP, DEVLINK_MLXSW_TRAP_ID_##_id,	      \
+			    DEVLINK_MLXSW_TRAP_NAME_##_id,		      \
+			    DEVLINK_TRAP_GROUP_GENERIC(_group_id),	      \
+			    MLXSW_SP_TRAP_METADATA)
+
 #define MLXSW_SP_TRAP_EXCEPTION(_id, _group_id)		      \
 	DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id,			      \
 			     DEVLINK_TRAP_GROUP_GENERIC(_group_id),	      \
@@ -58,6 +78,11 @@ static struct devlink_trap mlxsw_sp_traps_arr[] = {
 	MLXSW_SP_TRAP_EXCEPTION(UNRESOLVED_NEIGH, L3_DROPS),
 	MLXSW_SP_TRAP_EXCEPTION(IPV4_LPM_UNICAST_MISS, L3_DROPS),
 	MLXSW_SP_TRAP_EXCEPTION(IPV6_LPM_UNICAST_MISS, L3_DROPS),
+	MLXSW_SP_TRAP_DRIVER_DROP(IRIF_DISABLED, L3_DROPS),
+	MLXSW_SP_TRAP_DRIVER_DROP(ERIF_DISABLED, L3_DROPS),
+	MLXSW_SP_TRAP_DROP(NON_ROUTABLE, L3_DROPS),
+	MLXSW_SP_TRAP_EXCEPTION(DECAP_ERROR, TUNNEL_DROPS),
+	MLXSW_SP_TRAP_DROP(OVERLAY_SMAC_MC, TUNNEL_DROPS),
 };
 
 static struct mlxsw_listener mlxsw_sp_listeners_arr[] = {
@@ -90,6 +115,15 @@ static struct mlxsw_listener mlxsw_sp_listeners_arr[] = {
 			       TRAP_EXCEPTION_TO_CPU),
 	MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM6, ROUTER_EXP,
 			       TRAP_EXCEPTION_TO_CPU),
+	MLXSW_SP_RXL_DISCARD(ROUTER_IRIF_EN, L3_DISCARDS),
+	MLXSW_SP_RXL_DISCARD(ROUTER_ERIF_EN, L3_DISCARDS),
+	MLXSW_SP_RXL_DISCARD(NON_ROUTABLE, L3_DISCARDS),
+	MLXSW_SP_RXL_EXCEPTION(DECAP_ECN0, ROUTER_EXP, TRAP_EXCEPTION_TO_CPU),
+	MLXSW_SP_RXL_EXCEPTION(IPIP_DECAP_ERROR, ROUTER_EXP,
+			       TRAP_EXCEPTION_TO_CPU),
+	MLXSW_SP_RXL_EXCEPTION(DISCARD_DEC_PKT, TUNNEL_DISCARDS,
+			       TRAP_EXCEPTION_TO_CPU),
+	MLXSW_SP_RXL_DISCARD(OVERLAY_SMAC_MC, TUNNEL_DISCARDS),
 };
 
 /* Mapping between hardware trap and devlink trap. Multiple hardware traps can
@@ -123,6 +157,13 @@ static u16 mlxsw_sp_listener_devlink_map[] = {
 	DEVLINK_TRAP_GENERIC_ID_UNRESOLVED_NEIGH,
 	DEVLINK_TRAP_GENERIC_ID_IPV4_LPM_UNICAST_MISS,
 	DEVLINK_TRAP_GENERIC_ID_IPV6_LPM_UNICAST_MISS,
+	DEVLINK_MLXSW_TRAP_ID_IRIF_DISABLED,
+	DEVLINK_MLXSW_TRAP_ID_ERIF_DISABLED,
+	DEVLINK_TRAP_GENERIC_ID_NON_ROUTABLE,
+	DEVLINK_TRAP_GENERIC_ID_DECAP_ERROR,
+	DEVLINK_TRAP_GENERIC_ID_DECAP_ERROR,
+	DEVLINK_TRAP_GENERIC_ID_DECAP_ERROR,
+	DEVLINK_TRAP_GENERIC_ID_OVERLAY_SMAC_MC,
 };
 
 static int mlxsw_sp_rx_listener(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
@@ -304,8 +345,9 @@ mlxsw_sp_trap_group_policer_init(struct mlxsw_sp *mlxsw_sp,
 	u32 rate;
 
 	switch (group->id) {
-	case DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS:/* fall through */
-	case DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS:
+	case DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS: /* fall through */
+	case DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS: /* fall through */
+	case DEVLINK_TRAP_GROUP_GENERIC_ID_TUNNEL_DROPS:
 		policer_id = MLXSW_SP_DISCARD_POLICER_ID;
 		ir_units = MLXSW_REG_QPCR_IR_UNITS_M;
 		is_bytes = false;
@@ -342,6 +384,12 @@ __mlxsw_sp_trap_group_init(struct mlxsw_sp *mlxsw_sp,
 		priority = 0;
 		tc = 1;
 		break;
+	case DEVLINK_TRAP_GROUP_GENERIC_ID_TUNNEL_DROPS:
+		group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_TUNNEL_DISCARDS;
+		policer_id = MLXSW_SP_DISCARD_POLICER_ID;
+		priority = 0;
+		tc = 1;
+		break;
 	default:
 		return -EINVAL;
 	}

drivers/net/ethernet/mellanox/mlxsw/trap.h

@@ -67,6 +67,7 @@ enum {
 	MLXSW_TRAP_ID_NVE_ENCAP_ARP = 0xBD,
 	MLXSW_TRAP_ID_ROUTER_ALERT_IPV4 = 0xD6,
 	MLXSW_TRAP_ID_ROUTER_ALERT_IPV6 = 0xD7,
+	MLXSW_TRAP_ID_DISCARD_NON_ROUTABLE = 0x11A,
 	MLXSW_TRAP_ID_DISCARD_ROUTER2 = 0x130,
 	MLXSW_TRAP_ID_DISCARD_ROUTER3 = 0x131,
 	MLXSW_TRAP_ID_DISCARD_ING_PACKET_SMAC_MC = 0x140,
@@ -88,8 +89,12 @@ enum {
 	MLXSW_TRAP_ID_DISCARD_ING_ROUTER_IPV4_SIP_BC = 0x16A,
 	MLXSW_TRAP_ID_DISCARD_ING_ROUTER_IPV4_DIP_LOCAL_NET = 0x16B,
 	MLXSW_TRAP_ID_DISCARD_ING_ROUTER_DIP_LINK_LOCAL = 0x16C,
+	MLXSW_TRAP_ID_DISCARD_ROUTER_IRIF_EN = 0x178,
+	MLXSW_TRAP_ID_DISCARD_ROUTER_ERIF_EN = 0x179,
 	MLXSW_TRAP_ID_DISCARD_ROUTER_LPM4 = 0x17B,
 	MLXSW_TRAP_ID_DISCARD_ROUTER_LPM6 = 0x17C,
+	MLXSW_TRAP_ID_DISCARD_DEC_PKT = 0x188,
+	MLXSW_TRAP_ID_DISCARD_OVERLAY_SMAC_MC = 0x190,
 	MLXSW_TRAP_ID_DISCARD_IPV6_MC_DIP_RESERVED_SCOPE = 0x1B0,
 	MLXSW_TRAP_ID_DISCARD_IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE = 0x1B1,
 	MLXSW_TRAP_ID_ACL0 = 0x1C0,

include/net/devlink.h

@@ -591,6 +591,9 @@ enum devlink_trap_generic_id {
 	DEVLINK_TRAP_GENERIC_ID_REJECT_ROUTE,
 	DEVLINK_TRAP_GENERIC_ID_IPV4_LPM_UNICAST_MISS,
 	DEVLINK_TRAP_GENERIC_ID_IPV6_LPM_UNICAST_MISS,
+	DEVLINK_TRAP_GENERIC_ID_NON_ROUTABLE,
+	DEVLINK_TRAP_GENERIC_ID_DECAP_ERROR,
+	DEVLINK_TRAP_GENERIC_ID_OVERLAY_SMAC_MC,
 
 	/* Add new generic trap IDs above */
 	__DEVLINK_TRAP_GENERIC_ID_MAX,
@@ -604,6 +607,7 @@ enum devlink_trap_group_generic_id {
 	DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS,
 	DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS,
 	DEVLINK_TRAP_GROUP_GENERIC_ID_BUFFER_DROPS,
+	DEVLINK_TRAP_GROUP_GENERIC_ID_TUNNEL_DROPS,
 
 	/* Add new generic trap group IDs above */
 	__DEVLINK_TRAP_GROUP_GENERIC_ID_MAX,
@@ -659,6 +663,12 @@ enum devlink_trap_group_generic_id {
 	"ipv4_lpm_miss"
 #define DEVLINK_TRAP_GENERIC_NAME_IPV6_LPM_UNICAST_MISS \
 	"ipv6_lpm_miss"
+#define DEVLINK_TRAP_GENERIC_NAME_NON_ROUTABLE \
+	"non_routable_packet"
+#define DEVLINK_TRAP_GENERIC_NAME_DECAP_ERROR \
+	"decap_error"
+#define DEVLINK_TRAP_GENERIC_NAME_OVERLAY_SMAC_MC \
+	"overlay_smac_is_mc"
 
 #define DEVLINK_TRAP_GROUP_GENERIC_NAME_L2_DROPS \
 	"l2_drops"
@@ -666,6 +676,8 @@ enum devlink_trap_group_generic_id {
 	"l3_drops"
 #define DEVLINK_TRAP_GROUP_GENERIC_NAME_BUFFER_DROPS \
 	"buffer_drops"
+#define DEVLINK_TRAP_GROUP_GENERIC_NAME_TUNNEL_DROPS \
+	"tunnel_drops"
 
 #define DEVLINK_TRAP_GENERIC(_type, _init_action, _id, _group, _metadata_cap) \
 	{								      \

net/core/devlink.c

@@ -7706,6 +7706,9 @@ static const struct devlink_trap devlink_trap_generic[] = {
 	DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
 	DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
 	DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
+	DEVLINK_TRAP(NON_ROUTABLE, DROP),
+	DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
+	DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
 };
 
 #define DEVLINK_TRAP_GROUP(_id)						      \
@@ -7718,6 +7721,7 @@ static const struct devlink_trap_group devlink_trap_group_generic[] = {
 	DEVLINK_TRAP_GROUP(L2_DROPS),
 	DEVLINK_TRAP_GROUP(L3_DROPS),
 	DEVLINK_TRAP_GROUP(BUFFER_DROPS),
+	DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
 };
 
 static int devlink_trap_generic_verify(const struct devlink_trap *trap)

tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh

@@ -50,6 +50,8 @@ ALL_TESTS="
 	ipv6_mc_dip_reserved_scope_test
 	ipv6_mc_dip_interface_local_scope_test
 	blackhole_route_test
+	irif_disabled_test
+	erif_disabled_test
 "
 
 NUM_NETIFS=4
@@ -553,6 +555,116 @@ blackhole_route_test()
 	__blackhole_route_test "6" "2001:db8:2::/120" "ipv6" $h2_ipv6 "icmpv6"
 }
 
+irif_disabled_test()
+{
+	local trap_name="irif_disabled"
+	local group_name="l3_drops"
+	local t0_packets t0_bytes
+	local t1_packets t1_bytes
+	local mz_pid
+
+	RET=0
+
+	ping_check $trap_name
+
+	devlink_trap_action_set $trap_name "trap"
+
+	# When RIF of a physical port ("Sub-port RIF") is destroyed, we first
+	# block the STP of the {Port, VLAN} so packets cannot get into the RIF.
+	# Using bridge enables us to see this trap because when bridge is
+	# destroyed, there is a small time window that packets can go into the
+	# RIF, while it is disabled.
+	ip link add dev br0 type bridge
+	ip link set dev $rp1 master br0
+	ip address flush dev $rp1
+	__addr_add_del br0 add 192.0.2.2/24
+	ip li set dev br0 up
+
+	t0_packets=$(devlink_trap_rx_packets_get $trap_name)
+	t0_bytes=$(devlink_trap_rx_bytes_get $trap_name)
+
+	# Generate packets to h2 through br0 RIF that will be removed later
+	$MZ $h1 -t udp "sp=54321,dp=12345" -c 0 -p 100 -a own -b $rp1mac \
+		-B $h2_ipv4 -q &
+	mz_pid=$!
+
+	# Wait before removing br0 RIF to allow packets to go into the bridge.
+	sleep 1
+
+	# Flushing address will dismantle the RIF
+	ip address flush dev br0
+
+	t1_packets=$(devlink_trap_rx_packets_get $trap_name)
+	t1_bytes=$(devlink_trap_rx_bytes_get $trap_name)
+
+	if [[ $t0_packets -eq $t1_packets && $t0_bytes -eq $t1_bytes ]]; then
+		check_err 1 "Trap stats idle when packets should be trapped"
+	fi
+
+	log_test "Ingress RIF disabled"
+
+	kill $mz_pid && wait $mz_pid &> /dev/null
+	ip link set dev $rp1 nomaster
+	__addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64
+	ip link del dev br0 type bridge
+	devlink_trap_action_set $trap_name "drop"
+}
+
+erif_disabled_test()
+{
+	local trap_name="erif_disabled"
+	local group_name="l3_drops"
+	local t0_packets t0_bytes
+	local t1_packets t1_bytes
+	local mz_pid
+
+	RET=0
+
+	ping_check $trap_name
+
+	devlink_trap_action_set $trap_name "trap"
+	ip link add dev br0 type bridge
+	ip add flush dev $rp1
+	ip link set dev $rp1 master br0
+	__addr_add_del br0 add 192.0.2.2/24
+	ip link set dev br0 up
+
+	t0_packets=$(devlink_trap_rx_packets_get $trap_name)
+	t0_bytes=$(devlink_trap_rx_bytes_get $trap_name)
+
+	rp2mac=$(mac_get $rp2)
+
+	# Generate packets that should go out through br0 RIF that will be
+	# removed later
+	$MZ $h2 -t udp "sp=54321,dp=12345" -c 0 -p 100 -a own -b $rp2mac \
+		-B 192.0.2.1 -q &
+	mz_pid=$!
+
+	sleep 5
+	# In order to see this trap we need a route that points to disabled RIF.
+	# When ipv6 address is flushed, there is a delay and the routes are
+	# deleted before the RIF and we cannot get state that we have route
+	# to disabled RIF.
+	# Delete IPv6 address first and then check this trap with flushing IPv4.
+	ip -6 add flush dev br0
+	ip -4 add flush dev br0
+
+	t1_packets=$(devlink_trap_rx_packets_get $trap_name)
+	t1_bytes=$(devlink_trap_rx_bytes_get $trap_name)
+
+	if [[ $t0_packets -eq $t1_packets && $t0_bytes -eq $t1_bytes ]]; then
+		check_err 1 "Trap stats idle when packets should be trapped"
+	fi
+
+	log_test "Egress RIF disabled"
+
+	kill $mz_pid && wait $mz_pid &> /dev/null
+	ip link set dev $rp1 nomaster
+	__addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64
+	ip link del dev br0 type bridge
+	devlink_trap_action_set $trap_name "drop"
+}
+
 trap cleanup EXIT
 
 setup_prepare

tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh

+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test devlink-trap tunnel exceptions functionality over mlxsw.
+# Check all exception traps to make sure they are triggered under the right
+# conditions.
+
+# +-------------------------+
+# | H1                      |
+# |               $h1 +     |
+# |      192.0.2.1/28 |     |
+# +-------------------|-----+
+#                     |
+# +-------------------|-----+
+# | SW1               |     |
+# |              $swp1 +    |
+# |      192.0.2.2/28       |
+# |                         |
+# |  + g1a (gre)            |
+# |    loc=192.0.2.65       |
+# |    rem=192.0.2.66       |
+# |    tos=inherit          |
+# |                         |
+# |  + $rp1                 |
+# |  |  198.51.100.1/28     |
+# +--|----------------------+
+#    |
+# +--|----------------------+
+# |  |                 VRF2 |
+# | + $rp2                  |
+# |   198.51.100.2/28       |
+# +-------------------------+
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+	decap_error_test
+"
+
+NUM_NETIFS=4
+source $lib_dir/lib.sh
+source $lib_dir/tc_common.sh
+source $lib_dir/devlink_lib.sh
+
+h1_create()
+{
+	simple_if_init $h1 192.0.2.1/28
+}
+
+h1_destroy()
+{
+	simple_if_fini $h1 192.0.2.1/28
+}
+
+vrf2_create()
+{
+	simple_if_init $rp2 198.51.100.2/28
+}
+
+vrf2_destroy()
+{
+	simple_if_fini $rp2 198.51.100.2/28
+}
+
+switch_create()
+{
+	__addr_add_del $swp1 add 192.0.2.2/28
+	tc qdisc add dev $swp1 clsact
+	ip link set dev $swp1 up
+
+	tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit
+	__addr_add_del g1 add 192.0.2.65/32
+	ip link set dev g1 up
+
+	__addr_add_del $rp1 add 198.51.100.1/28
+	ip link set dev $rp1 up
+}
+
+switch_destroy()
+{
+	ip link set dev $rp1 down
+	__addr_add_del $rp1 del 198.51.100.1/28
+
+	ip link set dev g1 down
+	__addr_add_del g1 del 192.0.2.65/32
+	tunnel_destroy g1
+
+	ip link set dev $swp1 down
+	tc qdisc del dev $swp1 clsact
+	__addr_add_del $swp1 del 192.0.2.2/28
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	rp1=${NETIFS[p3]}
+	rp2=${NETIFS[p4]}
+
+	forwarding_enable
+	vrf_prepare
+	h1_create
+	switch_create
+	vrf2_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	vrf2_destroy
+	switch_destroy
+	h1_destroy
+	vrf_cleanup
+	forwarding_restore
+}
+
+ecn_payload_get()
+{
+	p=$(:
+		)"0"$(		              : GRE flags
+	        )"0:00:"$(                    : Reserved + version
+		)"08:00:"$(		      : ETH protocol type
+		)"4"$(	                      : IP version
+		)"5:"$(                       : IHL
+		)"00:"$(                      : IP TOS
+		)"00:14:"$(                   : IP total length
+		)"00:00:"$(                   : IP identification
+		)"20:00:"$(                   : IP flags + frag off
+		)"30:"$(                      : IP TTL
+		)"01:"$(                      : IP proto
+		)"E7:E6:"$(    	              : IP header csum
+		)"C0:00:01:01:"$(             : IP saddr : 192.0.1.1
+		)"C0:00:02:01:"$(             : IP daddr : 192.0.2.1
+		)
+	echo $p
+}
+
+ecn_decap_test()
+{
+	local trap_name="decap_error"
+	local group_name="tunnel_drops"
+	local desc=$1; shift
+	local ecn_desc=$1; shift
+	local outer_tos=$1; shift
+	local mz_pid
+
+	RET=0
+
+	tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+		flower src_ip 192.0.1.1 dst_ip 192.0.2.1 action pass
+
+	rp1_mac=$(mac_get $rp1)
+	rp2_mac=$(mac_get $rp2)
+	payload=$(ecn_payload_get)
+
+	ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -a $rp2_mac -b $rp1_mac \
+		-A 192.0.2.66 -B 192.0.2.65 -t ip \
+			len=48,tos=$outer_tos,proto=47,p=$payload -q &
+
+	mz_pid=$!
+
+	devlink_trap_exception_test $trap_name $group_name
+
+	tc_check_packets "dev $swp1 egress" 101 0
+	check_err $? "Packets were not dropped"
+
+	log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc"
+
+	kill $mz_pid && wait $mz_pid &> /dev/null
+	tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
+}
+
+ipip_payload_get()
+{
+	local flags=$1; shift
+	local key=$1; shift
+
+	p=$(:
+		)"$flags"$(		      : GRE flags
+	        )"0:00:"$(                    : Reserved + version
+		)"08:00:"$(		      : ETH protocol type
+		)"$key"$( 		      : Key
+		)"4"$(	                      : IP version
+		)"5:"$(                       : IHL
+		)"00:"$(                      : IP TOS
+		)"00:14:"$(                   : IP total length
+		)"00:00:"$(                   : IP identification
+		)"20:00:"$(                   : IP flags + frag off
+		)"30:"$(                      : IP TTL
+		)"01:"$(                      : IP proto
+		)"E7:E6:"$(    	              : IP header csum
+		)"C0:00:01:01:"$(             : IP saddr : 192.0.1.1
+		)"C0:00:02:01:"$(             : IP daddr : 192.0.2.1
+		)
+	echo $p
+}
+
+no_matching_tunnel_test()
+{
+	local trap_name="decap_error"
+	local group_name="tunnel_drops"
+	local desc=$1; shift
+	local sip=$1; shift
+	local mz_pid
+
+	RET=0
+
+	tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+		flower src_ip 192.0.1.1 dst_ip 192.0.2.1 action pass
+
+	rp1_mac=$(mac_get $rp1)
+	rp2_mac=$(mac_get $rp2)
+	payload=$(ipip_payload_get "$@")
+
+	ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -a $rp2_mac -b $rp1_mac \
+		-A $sip -B 192.0.2.65 -t ip len=48,proto=47,p=$payload -q &
+	mz_pid=$!
+
+	devlink_trap_exception_test $trap_name $group_name
+
+	tc_check_packets "dev $swp1 egress" 101 0
+	check_err $? "Packets were not dropped"
+
+	log_test "$desc"
+
+	kill $mz_pid && wait $mz_pid &> /dev/null
+	tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
+}
+
+decap_error_test()
+{
+	# Correct source IP - the remote address
+	local sip=192.0.2.66
+
+	ecn_decap_test "Decap error" "ECT(1)" 01
+	ecn_decap_test "Decap error" "ECT(0)" 02
+	ecn_decap_test "Decap error" "CE" 03
+
+	no_matching_tunnel_test "Decap error: Source IP check failed" \
+		192.0.2.68 "0"
+	no_matching_tunnel_test \
+		"Decap error: Key exists but was not expected" $sip "2" ":E9:"
+
+	# Destroy the tunnel and create new one with key
+	__addr_add_del g1 del 192.0.2.65/32
+	tunnel_destroy g1
+
+	tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit key 233
+	__addr_add_del g1 add 192.0.2.65/32
+
+	no_matching_tunnel_test \
+		"Decap error: Key does not exist but was expected" $sip "0"
+	no_matching_tunnel_test \
+		"Decap error: Packet has a wrong key field" $sip "2" "E8:"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+tests_run
+
+exit $EXIT_STATUS

tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh

+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test devlink-trap tunnel drops and exceptions functionality over mlxsw.
+# Check all traps to make sure they are triggered under the right
+# conditions.
+
+# +--------------------+
+# | H1 (vrf)           |
+# |    + $h1           |
+# |    | 192.0.2.1/28  |
+# +----|---------------+
+#      |
+# +----|----------------------------------------------------------------------+
+# | SW |                                                                      |
+# | +--|--------------------------------------------------------------------+ |
+# | |  + $swp1                   BR1 (802.1d)                               | |
+# | |                                                                       | |
+# | |  + vx1 (vxlan)                                                        | |
+# | |    local 192.0.2.17                                                   | |
+# | |    id 1000 dstport $VXPORT                                            | |
+# | +-----------------------------------------------------------------------+ |
+# |                                                                           |
+# |    + $rp1                                                                 |
+# |    | 192.0.2.17/28                                                        |
+# +----|----------------------------------------------------------------------+
+#      |
+# +----|--------------------------------------------------------+
+# |    |                                             VRF2       |
+# |    + $rp2                                                   |
+# |      192.0.2.18/28                                          |
+# |                                                             |
+# +-------------------------------------------------------------+
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+	decap_error_test
+	overlay_smac_is_mc_test
+"
+
+NUM_NETIFS=4
+source $lib_dir/lib.sh
+source $lib_dir/tc_common.sh
+source $lib_dir/devlink_lib.sh
+
+: ${VXPORT:=4789}
+export VXPORT
+
+h1_create()
+{
+	simple_if_init $h1 192.0.2.1/28
+}
+
+h1_destroy()
+{
+	simple_if_fini $h1 192.0.2.1/28
+}
+
+switch_create()
+{
+	ip link add name br1 type bridge vlan_filtering 0 mcast_snooping 0
+	# Make sure the bridge uses the MAC address of the local port and not
+	# that of the VxLAN's device.
+	ip link set dev br1 address $(mac_get $swp1)
+	ip link set dev br1 up
+
+	tc qdisc add dev $swp1 clsact
+	ip link set dev $swp1 master br1
+	ip link set dev $swp1 up
+
+	ip link add name vx1 type vxlan id 1000 local 192.0.2.17 \
+		dstport "$VXPORT" nolearning noudpcsum tos inherit ttl 100
+	ip link set dev vx1 master br1
+	ip link set dev vx1 up
+
+	ip address add dev $rp1 192.0.2.17/28
+	ip link set dev $rp1 up
+}
+
+switch_destroy()
+{
+	ip link set dev $rp1 down
+	ip address del dev $rp1 192.0.2.17/28
+
+	ip link set dev vx1 down
+	ip link set dev vx1 nomaster
+	ip link del dev vx1
+
+	ip link set dev $swp1 down
+	ip link set dev $swp1 nomaster
+	tc qdisc del dev $swp1 clsact
+
+	ip link set dev br1 down
+	ip link del dev br1
+}
+
+vrf2_create()
+{
+	simple_if_init $rp2 192.0.2.18/28
+}
+
+vrf2_destroy()
+{
+	simple_if_fini $rp2 192.0.2.18/28
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	rp1=${NETIFS[p3]}
+	rp2=${NETIFS[p4]}
+
+	vrf_prepare
+	forwarding_enable
+	h1_create
+	switch_create
+	vrf2_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	vrf2_destroy
+	switch_destroy
+	h1_destroy
+	forwarding_restore
+	vrf_cleanup
+}
+
+ecn_payload_get()
+{
+	dest_mac=$(mac_get $h1)
+	p=$(:
+		)"08:"$(                      : VXLAN flags
+		)"00:00:00:"$(                : VXLAN reserved
+		)"00:03:e8:"$(                : VXLAN VNI : 1000
+		)"00:"$(                      : VXLAN reserved
+		)"$dest_mac:"$(               : ETH daddr
+		)"00:00:00:00:00:00:"$(       : ETH saddr
+		)"08:00:"$(                   : ETH type
+		)"45:"$(                      : IP version + IHL
+		)"00:"$(                      : IP TOS
+		)"00:14:"$(                   : IP total length
+		)"00:00:"$(                   : IP identification
+		)"20:00:"$(                   : IP flags + frag off
+		)"40:"$(                      : IP TTL
+		)"00:"$(                      : IP proto
+		)"D6:E5:"$(                   : IP header csum
+		)"c0:00:02:03:"$(             : IP saddr: 192.0.2.3
+		)"c0:00:02:01:"$(             : IP daddr: 192.0.2.1
+		)
+	echo $p
+}
+
+ecn_decap_test()
+{
+	local trap_name="decap_error"
+	local group_name="tunnel_drops"
+	local desc=$1; shift
+	local ecn_desc=$1; shift
+	local outer_tos=$1; shift
+	local mz_pid
+
+	RET=0
+
+	tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+		flower src_ip 192.0.2.3 dst_ip 192.0.2.1 action pass
+
+	rp1_mac=$(mac_get $rp1)
+	payload=$(ecn_payload_get)
+
+	ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -b $rp1_mac -B 192.0.2.17 \
+		-t udp sp=12345,dp=$VXPORT,tos=$outer_tos,p=$payload -q &
+	mz_pid=$!
+
+	devlink_trap_exception_test $trap_name $group_name
+
+	tc_check_packets "dev $swp1 egress" 101 0
+	check_err $? "Packets were not dropped"
+
+	log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc"
+
+	kill $mz_pid && wait $mz_pid &> /dev/null
+	tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
+}
+
+reserved_bits_payload_get()
+{
+	dest_mac=$(mac_get $h1)
+	p=$(:
+		)"08:"$(                      : VXLAN flags
+		)"01:00:00:"$(                : VXLAN reserved
+		)"00:03:e8:"$(                : VXLAN VNI : 1000
+		)"00:"$(                      : VXLAN reserved
+		)"$dest_mac:"$(               : ETH daddr
+		)"00:00:00:00:00:00:"$(       : ETH saddr
+		)"08:00:"$(                   : ETH type
+		)"45:"$(                      : IP version + IHL
+		)"00:"$(                      : IP TOS
+		)"00:14:"$(                   : IP total length
+		)"00:00:"$(                   : IP identification
+		)"20:00:"$(                   : IP flags + frag off
+		)"40:"$(                      : IP TTL
+		)"00:"$(                      : IP proto
+		)"00:00:"$(                   : IP header csum
+		)"c0:00:02:03:"$(             : IP saddr: 192.0.2.3
+		)"c0:00:02:01:"$(             : IP daddr: 192.0.2.1
+		)
+	echo $p
+}
+
+short_payload_get()
+{
+        dest_mac=$(mac_get $h1)
+        p=$(:
+		)"08:"$(                      : VXLAN flags
+		)"01:00:00:"$(                : VXLAN reserved
+		)"00:03:e8:"$(                : VXLAN VNI : 1000
+		)"00:"$(                      : VXLAN reserved
+		)
+        echo $p
+}
+
+corrupted_packet_test()
+{
+	local trap_name="decap_error"
+	local group_name="tunnel_drops"
+	local desc=$1; shift
+	local payload_get=$1; shift
+	local mz_pid
+
+	RET=0
+
+	# In case of too short packet, there is no any inner packet,
+	# so the matching will always succeed
+	tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+		flower skip_hw src_ip 192.0.2.3 dst_ip 192.0.2.1 action pass
+
+	rp1_mac=$(mac_get $rp1)
+	payload=$($payload_get)
+	ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -b $rp1_mac \
+		-B 192.0.2.17 -t udp sp=12345,dp=$VXPORT,p=$payload -q &
+	mz_pid=$!
+
+	devlink_trap_exception_test $trap_name $group_name
+
+	tc_check_packets "dev $swp1 egress" 101 0
+	check_err $? "Packets were not dropped"
+
+	log_test "$desc"
+
+	kill $mz_pid && wait $mz_pid &> /dev/null
+	tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
+}
+
+decap_error_test()
+{
+	ecn_decap_test "Decap error" "ECT(1)" 01
+	ecn_decap_test "Decap error" "ECT(0)" 02
+	ecn_decap_test "Decap error" "CE" 03
+
+	corrupted_packet_test "Decap error: Reserved bits in use" \
+		"reserved_bits_payload_get"
+	corrupted_packet_test "Decap error: No L2 header" "short_payload_get"
+}
+
+mc_smac_payload_get()
+{
+	dest_mac=$(mac_get $h1)
+	source_mac=01:02:03:04:05:06
+	p=$(:
+		)"08:"$(                      : VXLAN flags
+		)"00:00:00:"$(                : VXLAN reserved
+		)"00:03:e8:"$(                : VXLAN VNI : 1000
+		)"00:"$(                      : VXLAN reserved
+		)"$dest_mac:"$(               : ETH daddr
+		)"$source_mac:"$(             : ETH saddr
+		)"08:00:"$(                   : ETH type
+		)"45:"$(                      : IP version + IHL
+		)"00:"$(                      : IP TOS
+		)"00:14:"$(                   : IP total length
+		)"00:00:"$(                   : IP identification
+		)"20:00:"$(                   : IP flags + frag off
+		)"40:"$(                      : IP TTL
+		)"00:"$(                      : IP proto
+		)"00:00:"$(                   : IP header csum
+		)"c0:00:02:03:"$(             : IP saddr: 192.0.2.3
+		)"c0:00:02:01:"$(             : IP daddr: 192.0.2.1
+		)
+	echo $p
+}
+
+overlay_smac_is_mc_test()
+{
+	local trap_name="overlay_smac_is_mc"
+	local group_name="tunnel_drops"
+	local mz_pid
+
+	RET=0
+
+	# The matching will be checked on devlink_trap_drop_test()
+	# and the filter will be removed on devlink_trap_drop_cleanup()
+	tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+		flower src_mac 01:02:03:04:05:06 action pass
+
+	rp1_mac=$(mac_get $rp1)
+	payload=$(mc_smac_payload_get)
+
+	ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -b $rp1_mac \
+		-B 192.0.2.17 -t udp sp=12345,dp=$VXPORT,p=$payload -q &
+	mz_pid=$!
+
+	devlink_trap_drop_test $trap_name $group_name $swp1
+
+	log_test "Overlay source MAC is multicast"
+
+	devlink_trap_drop_cleanup $mz_pid $swp1 "ip"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+tests_run
+
+exit $EXIT_STATUS