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mlxsw: spectrum_flower: Forbid to offload match on reserved TCP flags bits

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Matching on reserved TCP flags bits is only supported using custom
parser. Since the usecase for that is not known now, just forbid to
offload rules that match on these bits.

Reported-by: Alex Kushnarov <alexanderk@mellanox.com>
Signed-off-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:
Jiri Pirko
2019-07-27 20:32:57 +03:00
committed by David S. Miller
parent c9588e2812
commit 7079676d09
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
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@@ -267,6 +267,12 @@ static int mlxsw_sp_flower_parse_tcp(struct mlxsw_sp *mlxsw_sp,
flow_rule_match_tcp(rule, &match);
if (match.mask->flags & htons(0x0E00)) {
NL_SET_ERR_MSG_MOD(f->common.extack, "TCP flags match not supported on reserved bits");
dev_err(mlxsw_sp->bus_info->dev, "TCP flags match not supported on reserved bits\n");
return -EINVAL;
}
mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_TCP_FLAGS,
ntohs(match.key->flags),
ntohs(match.mask->flags));