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| author | Davide Caratti <dcaratti@redhat.com> | 2021-05-19 15:17:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-19 09:44:40 +0200 |
| commit | 1b832bd77799dc20884ecfea06100433c82d69d3 (patch) | |
| tree | f19d98b2b565c506dea9cb8190acfde240aee180 | |
| parent | 6ceb0182b087e64b754e3bfbcb4d71d2a51cb052 (diff) | |
| download | kernel_replicant_linux-1b832bd77799dc20884ecfea06100433c82d69d3.tar.gz kernel_replicant_linux-1b832bd77799dc20884ecfea06100433c82d69d3.tar.bz2 kernel_replicant_linux-1b832bd77799dc20884ecfea06100433c82d69d3.zip | |
net/sched: cls_api: increase max_reclassify_loop
[ Upstream commit 05ff8435e50569a0a6b95e5ceaea43696e8827ab ]
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: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/sched/cls_api.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index a281da07bb1d..30090794b791 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -1532,7 +1532,7 @@ 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; |