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net: ethernet: ti: cpsw: flower: validate control flags

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This driver currently doesn't support any control flags.

Use flow_rule_match_has_control_flags() to check for control flags,
such as can be set through `tc flower ... ip_flags frag`.

In case any control flags are masked, flow_rule_match_has_control_flags()
sets a NL extended error message, and we return -EOPNOTSUPP.

Only compile-tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240422152656.175627-1-ast@fiberby.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Asbjørn Sloth Tønnesen 2024-04-22 15:26:55 +00:00 committed by Jakub Kicinski
parent 8ae124f189
commit f97e0a5eac
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/ti/cpsw_priv.c
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@ -1404,6 +1404,9 @@ static int cpsw_qos_clsflower_add_policer(struct cpsw_priv *priv,
return -EOPNOTSUPP;
}
if (flow_rule_match_has_control_flags(rule, extack))
return -EOPNOTSUPP;
if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
NL_SET_ERR_MSG_MOD(extack, "Not matching on eth address");
return -EOPNOTSUPP;