From: Vlad Buslov <vladbu@nvidia.com>
Date: Mon, 4 Jul 2022 22:44:04 +0200
Subject: net/sched: act_police: allow 'continue' action offload
Patch-mainline: v5.19-rc6
Git-commit: 052f744f44462cc49b88a125b0f7b93a9e47a9dd
References: jsc#PED-1549

Offloading police with action TC_ACT_UNSPEC was erroneously disabled even
though it was supported by mlx5 matchall offload implementation, which
didn't verify the action type but instead assumed that any single police
action attached to matchall classifier is a 'continue' action. Lack of
action type check made it non-obvious what mlx5 matchall implementation
actually supports and caused implementers and reviewers of referenced
commits to disallow it as a part of improved validation code.

Fixes: b8cd5831c61c ("net: flow_offload: add tc police action parameters")
Fixes: b50e462bc22d ("net/sched: act_police: Add extack messages for offload failure")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 include/net/flow_offload.h |    1 +
 net/sched/act_police.c     |    2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -152,6 +152,7 @@ enum flow_action_id {
 	FLOW_ACTION_PIPE,
 	FLOW_ACTION_VLAN_PUSH_ETH,
 	FLOW_ACTION_VLAN_POP_ETH,
+	FLOW_ACTION_CONTINUE,
 	NUM_FLOW_ACTIONS,
 };
 
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -428,7 +428,7 @@ static int tcf_police_act_to_flow_act(in
 		act_id = FLOW_ACTION_JUMP;
 		*extval = tc_act & TC_ACT_EXT_VAL_MASK;
 	} else if (tc_act == TC_ACT_UNSPEC) {
-		NL_SET_ERR_MSG_MOD(extack, "Offload not supported when conform/exceed action is \"continue\"");
+		act_id = FLOW_ACTION_CONTINUE;
 	} else {
 		NL_SET_ERR_MSG_MOD(extack, "Unsupported conform/exceed action offload");
 	}