This is a note to let you know that I've just added the patch titled
openvswitch: meter: fix the incorrect calculation of max delta_t
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: openvswitch-meter-fix-the-incorrect-calculation-of-max-delta_t.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Mar 28 18:37:51 CEST 2018
From: zhangliping zhangliping02@baidu.com Date: Fri, 9 Mar 2018 10:08:50 +0800 Subject: openvswitch: meter: fix the incorrect calculation of max delta_t
From: zhangliping zhangliping02@baidu.com
[ Usptream commit ddc502dfed600bff0b61d899f70d95b76223fdfc ]
Max delat_t should be the full_bucket/rate instead of the full_bucket. Also report EINVAL if the rate is zero.
Fixes: 96fbc13d7e77 ("openvswitch: Add meter infrastructure") Cc: Andy Zhou azhou@ovn.org Signed-off-by: zhangliping zhangliping02@baidu.com Acked-by: Pravin B Shelar pshelar@ovn.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/openvswitch/meter.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
--- a/net/openvswitch/meter.c +++ b/net/openvswitch/meter.c @@ -242,14 +242,20 @@ static struct dp_meter *dp_meter_create(
band->type = nla_get_u32(attr[OVS_BAND_ATTR_TYPE]); band->rate = nla_get_u32(attr[OVS_BAND_ATTR_RATE]); + if (band->rate == 0) { + err = -EINVAL; + goto exit_free_meter; + } + band->burst_size = nla_get_u32(attr[OVS_BAND_ATTR_BURST]); /* Figure out max delta_t that is enough to fill any bucket. * Keep max_delta_t size to the bucket units: * pkts => 1/1000 packets, kilobits => bits. + * + * Start with a full bucket. */ - band_max_delta_t = (band->burst_size + band->rate) * 1000; - /* Start with a full bucket. */ - band->bucket = band_max_delta_t; + band->bucket = (band->burst_size + band->rate) * 1000; + band_max_delta_t = band->bucket / band->rate; if (band_max_delta_t > meter->max_delta_t) meter->max_delta_t = band_max_delta_t; band++;
Patches currently in stable-queue which might be from zhangliping02@baidu.com are
queue-4.15/openvswitch-meter-fix-the-incorrect-calculation-of-max-delta_t.patch