mlxsw: spectrum: Disable MC_DMAC check in hardware pipeline (359ec566) · Commits · 戴 / test

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>

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

+2 −0

Original line number	Diff line number	Diff line
		@@ -4547,6 +4547,8 @@ static const struct mlxsw_listener mlxsw_sp_listener[] = {
		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),

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

+1 −0

Original line number	Diff line number	Diff line
		@@ -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,

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