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mlxsw: core: Add support for EMAD string TLV parsing

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During parsing of incoming EMADs, fill the string TLV's offset when it is
used.

Signed-off-by: Shalom Toledo <shalomt@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>
This commit is contained in:
Shalom Toledo 2019-11-12 08:48:27 +02:00 committed by David S. Miller
parent 664b3dd9ba
commit 2aa4aa2051
1 changed files with 15 additions and 0 deletions
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15
drivers/net/ethernet/mellanox/mlxsw/core.c
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@ -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)