linux-kernel - [PATCH net-next] octeontx2-pf: flower: check for unsupported control flags

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Date: Mon, 22 Apr 2024 15:27:34 +0000
From: Asbjørn Sloth Tønnesen <ast@...erby.net>
To: netdev@...r.kernel.org
Cc: Asbjørn Sloth Tønnesen <ast@...erby.net>,
	linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Sunil Goutham <sgoutham@...vell.com>,
	Geetha sowjanya <gakula@...vell.com>,
	Subbaraya Sundeep <sbhatta@...vell.com>,
	hariprasad <hkelam@...vell.com>,
	Suman Ghosh <sumang@...vell.com>
Subject: [PATCH net-next] octeontx2-pf: flower: check for unsupported control flags

Use flow_rule_is_supp_control_flags() to reject filters with
unsupported control flags.

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

Remove FLOW_DIS_FIRST_FRAG specific error message,
and treat it as any other unsupported control flag.

Only compile-tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
index 6d4ce2ece8d0..e63cc1eb6d89 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
@@ -700,10 +700,6 @@ static int otx2_tc_prepare_flow(struct otx2_nic *nic, struct otx2_tc_flow *node,
 		u32 val;
 
 		flow_rule_match_control(rule, &match);
-		if (match.mask->flags & FLOW_DIS_FIRST_FRAG) {
-			NL_SET_ERR_MSG_MOD(extack, "HW doesn't support frag first/later");
-			return -EOPNOTSUPP;
-		}
 
 		if (match.mask->flags & FLOW_DIS_IS_FRAGMENT) {
 			val = match.key->flags & FLOW_DIS_IS_FRAGMENT;
@@ -721,6 +717,10 @@ static int otx2_tc_prepare_flow(struct otx2_nic *nic, struct otx2_tc_flow *node,
 				return -EOPNOTSUPP;
 			}
 		}
+
+		if (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT,
+						     match.mask->flags, extack))
+			return -EOPNOTSUPP;
 	}
 
 	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
-- 
2.43.0