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authorIdo Schimmel2020-05-29 21:36:45 +0300
committerDavid S. Miller2020-06-01 11:49:23 -0700
commit45b1c87313cd2ab2843edd4e6467e3d6458e0c68 (patch)
tree43a6bdbddbe6d74e76f91f40a648be3acadc11eb
parent1897936744f0ab366102170d7c76bfc8f7aeb2ba (diff)
mlxsw: spectrum_trap: Factor out common Rx listener function
We currently have an Rx listener function for exception traps that marks received skbs with 'offload_fwd_mark' and injects them to the kernel's Rx path. The marking is done because all these exceptions occur during L3 forwarding, after the packets were potentially flooded at L2. A subsequent patch will add support for control traps. Packets received via some of these control traps need different handling: 1. Packets might not need to be marked with 'offload_fwd_mark'. For example, if packet was trapped before L2 forwarding 2. Packets might not need to be injected to the kernel's Rx path. For example, sampled packets are reported to user space via the psample module Factor out a common Rx listener function that only reports trapped packets to devlink. Call it from mlxsw_sp_rx_no_mark_listener() and mlxsw_sp_rx_mark_listener() that will inject the packets to the kernel's Rx path, without and with the marking, respectively. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c29
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
index dc2217f1a07f..206751963a4f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
@@ -125,8 +125,8 @@ static void mlxsw_sp_rx_acl_drop_listener(struct sk_buff *skb, u8 local_port,
consume_skb(skb);
}
-static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port,
- void *trap_ctx)
+static int __mlxsw_sp_rx_no_mark_listener(struct sk_buff *skb, u8 local_port,
+ void *trap_ctx)
{
struct devlink_port *in_devlink_port;
struct mlxsw_sp_port *mlxsw_sp_port;
@@ -139,7 +139,7 @@ static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port,
err = mlxsw_sp_rx_listener(mlxsw_sp, skb, local_port, mlxsw_sp_port);
if (err)
- return;
+ return err;
devlink = priv_to_devlink(mlxsw_sp->core);
in_devlink_port = mlxsw_core_port_devlink_port_get(mlxsw_sp->core,
@@ -147,10 +147,29 @@ static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port,
skb_push(skb, ETH_HLEN);
devlink_trap_report(devlink, skb, trap_ctx, in_devlink_port, NULL);
skb_pull(skb, ETH_HLEN);
- skb->offload_fwd_mark = 1;
+
+ return 0;
+}
+
+static void mlxsw_sp_rx_no_mark_listener(struct sk_buff *skb, u8 local_port,
+ void *trap_ctx)
+{
+ int err;
+
+ err = __mlxsw_sp_rx_no_mark_listener(skb, local_port, trap_ctx);
+ if (err)
+ return;
+
netif_receive_skb(skb);
}
+static void mlxsw_sp_rx_mark_listener(struct sk_buff *skb, u8 local_port,
+ void *trap_ctx)
+{
+ skb->offload_fwd_mark = 1;
+ mlxsw_sp_rx_no_mark_listener(skb, local_port, trap_ctx);
+}
+
#define MLXSW_SP_TRAP_DROP(_id, _group_id) \
DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
@@ -183,7 +202,7 @@ static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port,
SET_FW_DEFAULT, SP_##_dis_group_id)
#define MLXSW_SP_RXL_EXCEPTION(_id, _group_id, _action) \
- MLXSW_RXL(mlxsw_sp_rx_exception_listener, _id, \
+ MLXSW_RXL(mlxsw_sp_rx_mark_listener, _id, \
_action, false, SP_##_group_id, SET_FW_DEFAULT)
#define MLXSW_SP_TRAP_POLICER(_id, _rate, _burst) \