iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
480e93e12a
linux/net/openvswitch
History
Tao Liu e4df1b0c24 openvswitch: meter: fix race when getting now_ms. 
We have observed meters working unexpected if traffic is 3+Gbit/s
with multiple connections.

now_ms is not pretected by meter->lock, we may get a negative
long_delta_ms when another cpu updated meter->used, then:
    delta_ms = (u32)long_delta_ms;
which will be a large value.

    band->bucket += delta_ms * band->rate;
then we get a wrong band->bucket.

OpenVswitch userspace datapath has fixed the same issue[1] some
time ago, and we port the implementation to kernel datapath.

[1] https://patchwork.ozlabs.org/project/openvswitch/patch/20191025114436.9746-1-i.maximets@ovn.org/

Fixes: 96fbc13d7e ("openvswitch: Add meter infrastructure")
Signed-off-by: Tao Liu <thomas.liu@ucloud.cn>
Suggested-by: Ilya Maximets <i.maximets@ovn.org>
Reviewed-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-13 15:54:59 -07:00
..
actions.c openvswitch: fix stack OOB read while fragmenting IPv4 packets 2021-04-29 15:31:53 -07:00
conntrack.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-04-09 20:48:35 -07:00
conntrack.h net/sched: act_api: fix miss set post_ct for ovs after do conntrack in act_ct 2021-03-16 15:22:18 -07:00
datapath.c net: openvswitch: silence suspicious RCU usage warning 2020-11-03 16:57:42 -08:00
datapath.h net: openvswitch: add masks cache hit counter 2020-08-03 15:17:48 -07:00
dp_notify.c net: openvswitch: use netif_ovs_is_port() instead of opencode 2019-07-08 15:53:25 -07:00
flow_netlink.c net: openvswitch: add log message for error case 2021-01-14 16:32:14 -08:00
flow_netlink.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269 2019-06-05 17:30:29 +02:00
flow_table.c net: openvswitch: silence suspicious RCU usage warning 2020-11-03 16:57:42 -08:00
flow_table.h net: openvswitch: fix to make sure flow_lookup() is not preempted 2020-10-18 12:29:36 -07:00
flow.c net/sched: act_api: fix miss set post_ct for ovs after do conntrack in act_ct 2021-03-16 15:22:18 -07:00
flow.h treewide: Use sizeof_field() macro 2019-12-09 10:36:44 -08:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile openvswitch: Add meter infrastructure 2017-11-13 10:37:07 +09:00
meter.c openvswitch: meter: fix race when getting now_ms. 2021-05-13 15:54:59 -07:00
meter.h net: openvswitch: use u64 for meter bucket 2020-04-23 18:26:11 -07:00
vport-geneve.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
vport-gre.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269 2019-06-05 17:30:29 +02:00
vport-internal_dev.c net: openvswitch: use core API to update/provide stats 2020-11-14 16:59:32 -08:00
vport-internal_dev.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269 2019-06-05 17:30:29 +02:00
vport-netdev.c net: openvswitch: Use 'skb_push_rcsum()' instead of hand coding it 2021-04-04 01:43:02 -07:00
vport-netdev.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269 2019-06-05 17:30:29 +02:00
vport-vxlan.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269 2019-06-05 17:30:29 +02:00
vport.c openvswitch: Warn over-mtu packets only if iface is UP. 2021-03-16 16:28:30 -07:00
vport.h openvswitch: Fix a typo 2021-03-22 12:59:46 -07:00