[ovs-dev] [PATCH AUTOSEL 4.19 149/206] net: openvswitch: use u64 for meter bucket

Sasha Levin sashal at kernel.org
Fri Sep 18 02:07:05 UTC 2020


From: Tonghao Zhang <xiangxia.m.yue at gmail.com>

[ Upstream commit e57358873bb5d6caa882b9684f59140912b37dde ]

When setting the meter rate to 4+Gbps, there is an
overflow, the meters don't work as expected.

Cc: Pravin B Shelar <pshelar at ovn.org>
Cc: Andy Zhou <azhou at ovn.org>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue at gmail.com>
Acked-by: Pravin B Shelar <pshelar at ovn.org>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 net/openvswitch/meter.c | 2 +-
 net/openvswitch/meter.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c
index c038e021a5916..6f5131d1074b0 100644
--- a/net/openvswitch/meter.c
+++ b/net/openvswitch/meter.c
@@ -255,7 +255,7 @@ static struct dp_meter *dp_meter_create(struct nlattr **a)
 		 *
 		 * Start with a full bucket.
 		 */
-		band->bucket = (band->burst_size + band->rate) * 1000;
+		band->bucket = (band->burst_size + band->rate) * 1000ULL;
 		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;
diff --git a/net/openvswitch/meter.h b/net/openvswitch/meter.h
index 964ace2650f89..970557ed5b5b6 100644
--- a/net/openvswitch/meter.h
+++ b/net/openvswitch/meter.h
@@ -26,7 +26,7 @@ struct dp_meter_band {
 	u32 type;
 	u32 rate;
 	u32 burst_size;
-	u32 bucket; /* 1/1000 packets, or in bits */
+	u64 bucket; /* 1/1000 packets, or in bits */
 	struct ovs_flow_stats stats;
 };
 
-- 
2.25.1



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