From: Amit Cohen <amitc@mellanox.com>
Date: Sun, 5 Jan 2020 18:20:52 +0200
Subject: mlxsw: spectrum: Disable MC_DMAC check in hardware pipeline
Patch-mainline: v5.6-rc1
Git-commit: 359ec56679efde731c09b2f1f9c93f65dd8e29df
References: bsc#1154488
The check drops packets if they need to be routed and their multicast
MAC mismatched to their multicast destination IP.
For IPV4:
DMAC is mismatched if it is different from {01-00-5E-0 (25 bits),
DIP[22:0]}
For IPV6:
DMAC is mismatched if it is different from {33-33-0 (16 bits),
DIP[31:0]}
Disable the check since the kernel forwards such packets and does not
drop them.
Signed-off-by: Amit Cohen <amitc@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 2 ++
drivers/net/ethernet/mellanox/mlxsw/trap.h | 1 +
2 files changed, 3 insertions(+)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -4552,6 +4552,8 @@ static const struct mlxsw_listener mlxsw
MLXSW_SP_RXL_MARK(IPV6_VRRP, TRAP_TO_CPU, VRRP, false),
MLXSW_SP_RXL_NO_MARK(DISCARD_ING_ROUTER_SIP_CLASS_E, FORWARD,
ROUTER_EXP, false),
+ MLXSW_SP_RXL_NO_MARK(DISCARD_ING_ROUTER_MC_DMAC, FORWARD,
+ ROUTER_EXP, false),
/* PKT Sample trap */
MLXSW_RXL(mlxsw_sp_rx_listener_sample_func, PKT_SAMPLE, MIRROR_TO_CPU,
false, SP_IP2ME, DISCARD),
--- a/drivers/net/ethernet/mellanox/mlxsw/trap.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/trap.h
@@ -83,6 +83,7 @@ enum {
MLXSW_TRAP_ID_DISCARD_ING_ROUTER_SIP_CLASS_E = 0x164,
MLXSW_TRAP_ID_DISCARD_ING_ROUTER_SIP_LB = 0x165,
MLXSW_TRAP_ID_DISCARD_ING_ROUTER_CORRUPTED_IP_HDR = 0x167,
+ MLXSW_TRAP_ID_DISCARD_ING_ROUTER_MC_DMAC = 0x168,
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_ROUTER_LPM4 = 0x17B,