From 2aa4aa2051f86d032ef86a268b38569cb3d450d0 Mon Sep 17 00:00:00 2001 From: Shalom Toledo Date: Tue, 12 Nov 2019 08:48:27 +0200 Subject: mlxsw: core: Add support for EMAD string TLV parsing During parsing of incoming EMADs, fill the string TLV's offset when it is used. Signed-off-by: Shalom Toledo Acked-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/core.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c index a50a36f9584b..d834bdc632ef 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core.c @@ -382,17 +382,32 @@ static void mlxsw_emad_construct(struct sk_buff *skb, struct mlxsw_emad_tlv_offsets { u16 op_tlv; + u16 string_tlv; u16 reg_tlv; }; +static bool mlxsw_emad_tlv_is_string_tlv(const char *tlv) +{ + u8 tlv_type = mlxsw_emad_string_tlv_type_get(tlv); + + return tlv_type == MLXSW_EMAD_TLV_TYPE_STRING; +} + static void mlxsw_emad_tlv_parse(struct sk_buff *skb) { struct mlxsw_emad_tlv_offsets *offsets = (struct mlxsw_emad_tlv_offsets *) skb->cb; offsets->op_tlv = MLXSW_EMAD_ETH_HDR_LEN; + offsets->string_tlv = 0; offsets->reg_tlv = MLXSW_EMAD_ETH_HDR_LEN + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32); + + /* If string TLV is present, it must come after the operation TLV. */ + if (mlxsw_emad_tlv_is_string_tlv(skb->data + offsets->reg_tlv)) { + offsets->string_tlv = offsets->reg_tlv; + offsets->reg_tlv += MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32); + } } static char *mlxsw_emad_op_tlv(const struct sk_buff *skb) -- cgit v1.2.3