diff options
| author | zhangliping <zhangliping02@baidu.com> | 2018-03-09 10:08:50 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-11 22:48:59 -0400 |
| commit | ddc502dfed600bff0b61d899f70d95b76223fdfc (patch) | |
| tree | 93165ab7f3f204fabcf50121fd7851ee464f3195 /net/openvswitch/meter.c | |
| parent | 13fbcc8dc573482dd3f27568257fd7087f8935f4 (diff) | |
| download | lwn-ddc502dfed600bff0b61d899f70d95b76223fdfc.tar.gz lwn-ddc502dfed600bff0b61d899f70d95b76223fdfc.zip | |
openvswitch: meter: fix the incorrect calculation of max delta_t
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>
Diffstat (limited to 'net/openvswitch/meter.c')
| -rw-r--r-- | net/openvswitch/meter.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c index 04b94281a30b..b891a91577f8 100644 --- a/net/openvswitch/meter.c +++ b/net/openvswitch/meter.c @@ -242,14 +242,20 @@ static struct dp_meter *dp_meter_create(struct nlattr **a) 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++; |