Commit 05ff8435 authored by Davide Caratti's avatar Davide Caratti Committed by David S. Miller
Browse files

net/sched: cls_api: increase max_reclassify_loop 



modern userspace applications, like OVN, can configure the TC datapath to
"recirculate" packets several times. If more than 4 "recirculation" rules
are configured, packets can be dropped by __tcf_classify().
Changing the maximum number of reclassifications (from 4 to 16) should be
sufficient to prevent drops in most use cases, and guard against loops at
the same time.

Signed-off-by: default avatarDavide Caratti <dcaratti@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7b16509b

net/sched/cls_api.c

+1 −1
Original line number Diff line number Diff line
@@ -1531,7 +1531,7 @@ static inline int __tcf_classify(struct sk_buff *skb, 
				 u32 *last_executed_chain)

{

#ifdef CONFIG_NET_CLS_ACT

	const int max_reclassify_loop = 4;

	const int max_reclassify_loop = 16;

	const struct tcf_proto *first_tp;

	int limit = 0;