1 files changed, 43 insertions, 22 deletions

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index b3b7978f4..5060801a2 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -66,6 +66,7 @@ struct cls_fl_filter {
 	struct fl_flow_key key;
 	struct list_head list;
 	u32 handle;
+	u32 flags;
 	struct rcu_head	rcu;
 };
 
@@ -123,6 +124,9 @@ static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 	struct fl_flow_key skb_key;
 	struct fl_flow_key skb_mkey;
 
+	if (!atomic_read(&head->ht.nelems))
+		return -1;
+
 	fl_clear_masked_range(&skb_key, &head->mask);
 	skb_key.indev_ifindex = skb->skb_iif;
 	/* skb_flow_dissect() does not set n_proto in case an unknown protocol,
@@ -136,7 +140,7 @@ static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 	f = rhashtable_lookup_fast(&head->ht,
 				   fl_key_get_start(&skb_mkey, &head->mask),
 				   head->ht_params);
-	if (f) {
+	if (f && !tc_skip_sw(f->flags)) {
 		*res = f->res;
 		return tcf_exts_exec(skb, &f->exts, res);
 	}
@@ -183,19 +187,20 @@ static void fl_hw_destroy_filter(struct tcf_proto *tp, unsigned long cookie)
 	dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
 }
 
-static void fl_hw_replace_filter(struct tcf_proto *tp,
-				 struct flow_dissector *dissector,
-				 struct fl_flow_key *mask,
-				 struct fl_flow_key *key,
-				 struct tcf_exts *actions,
-				 unsigned long cookie, u32 flags)
+static int fl_hw_replace_filter(struct tcf_proto *tp,
+				struct flow_dissector *dissector,
+				struct fl_flow_key *mask,
+				struct fl_flow_key *key,
+				struct tcf_exts *actions,
+				unsigned long cookie, u32 flags)
 {
 	struct net_device *dev = tp->q->dev_queue->dev;
 	struct tc_cls_flower_offload offload = {0};
 	struct tc_to_netdev tc;
+	int err;
 
 	if (!tc_should_offload(dev, tp, flags))
-		return;
+		return tc_skip_sw(flags) ? -EINVAL : 0;
 
 	offload.command = TC_CLSFLOWER_REPLACE;
 	offload.cookie = cookie;
@@ -207,7 +212,12 @@ static void fl_hw_replace_filter(struct tcf_proto *tp,
 	tc.type = TC_SETUP_CLSFLOWER;
 	tc.cls_flower = &offload;
 
-	dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
+	err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
+
+	if (tc_skip_sw(flags))
+		return err;
+
+	return 0;
 }
 
 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
@@ -524,7 +534,6 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 	struct cls_fl_filter *fnew;
 	struct nlattr *tb[TCA_FLOWER_MAX + 1];
 	struct fl_flow_mask mask = {};
-	u32 flags = 0;
 	int err;
 
 	if (!tca[TCA_OPTIONS])
@@ -552,8 +561,14 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 	}
 	fnew->handle = handle;
 
-	if (tb[TCA_FLOWER_FLAGS])
-		flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
+	if (tb[TCA_FLOWER_FLAGS]) {
+		fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
+
+		if (!tc_flags_valid(fnew->flags)) {
+			err = -EINVAL;
+			goto errout;
+		}
+	}
 
 	err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
 	if (err)
@@ -563,19 +578,23 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 	if (err)
 		goto errout;
 
-	err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
-				     head->ht_params);
+	if (!tc_skip_sw(fnew->flags)) {
+		err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
+					     head->ht_params);
+		if (err)
+			goto errout;
+	}
+
+	err = fl_hw_replace_filter(tp,
+				   &head->dissector,
+				   &mask.key,
+				   &fnew->key,
+				   &fnew->exts,
+				   (unsigned long)fnew,
+				   fnew->flags);
 	if (err)
 		goto errout;
 
-	fl_hw_replace_filter(tp,
-			     &head->dissector,
-			     &mask.key,
-			     &fnew->key,
-			     &fnew->exts,
-			     (unsigned long)fnew,
-			     flags);
-
 	if (fold) {
 		rhashtable_remove_fast(&head->ht, &fold->ht_node,
 				       head->ht_params);
@@ -734,6 +753,8 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
 				  sizeof(key->tp.dst))))
 		goto nla_put_failure;
 
+	nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags);
+
 	if (tcf_exts_dump(skb, &f->exts))
 		goto nla_put_failure;