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mlxsw: Add NON_ROUTABLE trap 

Add a trap for 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.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Cohen 2020-01-19 15:00:49 +02:00 committed by David S. Miller
parent 95f0ead8f0
commit 196442ec5f
2 changed files with 4 additions and 0 deletions
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3
drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
View File

@ -80,6 +80,7 @@ static struct devlink_trap mlxsw_sp_traps_arr[] = {
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),
};
static struct mlxsw_listener mlxsw_sp_listeners_arr[] = {
@ -114,6 +115,7 @@ static struct mlxsw_listener mlxsw_sp_listeners_arr[] = {
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),
};
/* Mapping between hardware trap and devlink trap. Multiple hardware traps can
@ -149,6 +151,7 @@ static u16 mlxsw_sp_listener_devlink_map[] = {
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,
};
static int mlxsw_sp_rx_listener(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,

1
drivers/net/ethernet/mellanox/mlxsw/trap.h
View File

@ -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,