1 files changed, 41 insertions, 0 deletions

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index ca5676b266..17d97bbe89 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -410,12 +410,48 @@ static void tcf_proto_get(struct tcf_proto *tp)
 	refcount_inc(&tp->refcnt);
 }
 
+static void tcf_maintain_bypass(struct tcf_block *block)
+{
+	int filtercnt = atomic_read(&block->filtercnt);
+	int skipswcnt = atomic_read(&block->skipswcnt);
+	bool bypass_wanted = filtercnt > 0 && filtercnt == skipswcnt;
+
+	if (bypass_wanted != block->bypass_wanted) {
+#ifdef CONFIG_NET_CLS_ACT
+		if (bypass_wanted)
+			static_branch_inc(&tcf_bypass_check_needed_key);
+		else
+			static_branch_dec(&tcf_bypass_check_needed_key);
+#endif
+		block->bypass_wanted = bypass_wanted;
+	}
+}
+
+static void tcf_block_filter_cnt_update(struct tcf_block *block, bool *counted, bool add)
+{
+	lockdep_assert_not_held(&block->cb_lock);
+
+	down_write(&block->cb_lock);
+	if (*counted != add) {
+		if (add) {
+			atomic_inc(&block->filtercnt);
+			*counted = true;
+		} else {
+			atomic_dec(&block->filtercnt);
+			*counted = false;
+		}
+	}
+	tcf_maintain_bypass(block);
+	up_write(&block->cb_lock);
+}
+
 static void tcf_chain_put(struct tcf_chain *chain);
 
 static void tcf_proto_destroy(struct tcf_proto *tp, bool rtnl_held,
 			      bool sig_destroy, struct netlink_ext_ack *extack)
 {
 	tp->ops->destroy(tp, rtnl_held, extack);
+	tcf_block_filter_cnt_update(tp->chain->block, &tp->counted, false);
 	if (sig_destroy)
 		tcf_proto_signal_destroyed(tp->chain, tp);
 	tcf_chain_put(tp->chain);
@@ -2367,6 +2403,7 @@ replay:
 		tfilter_notify(net, skb, n, tp, block, q, parent, fh,
 			       RTM_NEWTFILTER, false, rtnl_held, extack);
 		tfilter_put(tp, fh);
+		tcf_block_filter_cnt_update(block, &tp->counted, true);
 		/* q pointer is NULL for shared blocks */
 		if (q)
 			q->flags &= ~TCQ_F_CAN_BYPASS;
@@ -3483,6 +3520,8 @@ static void tcf_block_offload_inc(struct tcf_block *block, u32 *flags)
 	if (*flags & TCA_CLS_FLAGS_IN_HW)
 		return;
 	*flags |= TCA_CLS_FLAGS_IN_HW;
+	if (tc_skip_sw(*flags))
+		atomic_inc(&block->skipswcnt);
 	atomic_inc(&block->offloadcnt);
 }
 
@@ -3491,6 +3530,8 @@ static void tcf_block_offload_dec(struct tcf_block *block, u32 *flags)
 	if (!(*flags & TCA_CLS_FLAGS_IN_HW))
 		return;
 	*flags &= ~TCA_CLS_FLAGS_IN_HW;
+	if (tc_skip_sw(*flags))
+		atomic_dec(&block->skipswcnt);
 	atomic_dec(&block->offloadcnt);
 }