1 files changed, 56 insertions, 1 deletions
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 314087a5e181..ec9f80509f60 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -345,7 +345,7 @@ static inline bool flow_action_has_entries(const struct flow_action *action)
  * flow_offload_has_one_action() - check if exactly one action is present
  * @action: tc filter flow offload action
  *
- * Returns true if exactly one action is present.
+ * Return: true if exactly one action is present.
  */
 static inline bool flow_offload_has_one_action(const struct flow_action *action)
 {
@@ -449,6 +449,61 @@ static inline bool flow_rule_match_key(const struct flow_rule *rule,
 	return dissector_uses_key(rule->match.dissector, key);
 }
 
+/**
+ * flow_rule_is_supp_control_flags() - check for supported control flags
+ * @supp_flags: control flags supported by driver
+ * @ctrl_flags: control flags present in rule
+ * @extack: The netlink extended ACK for reporting errors.
+ *
+ * Return: true if only supported control flags are set, false otherwise.
+ */
+static inline bool flow_rule_is_supp_control_flags(const u32 supp_flags,
+						   const u32 ctrl_flags,
+						   struct netlink_ext_ack *extack)
+{
+	if (likely((ctrl_flags & ~supp_flags) == 0))
+		return true;
+
+	NL_SET_ERR_MSG_FMT_MOD(extack,
+			       "Unsupported match on control.flags %#x",
+			       ctrl_flags);
+
+	return false;
+}
+
+/**
+ * flow_rule_has_control_flags() - check for presence of any control flags
+ * @ctrl_flags: control flags present in rule
+ * @extack: The netlink extended ACK for reporting errors.
+ *
+ * Return: true if control flags are set, false otherwise.
+ */
+static inline bool flow_rule_has_control_flags(const u32 ctrl_flags,
+					       struct netlink_ext_ack *extack)
+{
+	return !flow_rule_is_supp_control_flags(0, ctrl_flags, extack);
+}
+
+/**
+ * flow_rule_match_has_control_flags() - match and check for any control flags
+ * @rule: The flow_rule under evaluation.
+ * @extack: The netlink extended ACK for reporting errors.
+ *
+ * Return: true if control flags are set, false otherwise.
+ */
+static inline bool flow_rule_match_has_control_flags(struct flow_rule *rule,
+						     struct netlink_ext_ack *extack)
+{
+	struct flow_match_control match;
+
+	if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL))
+		return false;
+
+	flow_rule_match_control(rule, &match);
+
+	return flow_rule_has_control_flags(match.mask->flags, extack);
+}
+
 struct flow_stats {
 	u64	pkts;
 	u64	bytes;