kernel/linux.git/net/openvswitch/meter.c, branch v5.10.257

net: openvswitch: fix possible memory leak in ovs_meter_cmd_set()

2023-02-22T11:55:57+00:00

commit 2fa28f5c6fcbfc794340684f36d2581b4f2d20b5 upstream. old_meter needs to be free after it is detached regardless of whether the new meter is successfully attached. Fixes: c7c4c44c9a95 ("net: openvswitch: expand the meters supported number") Signed-off-by: Hangyu Hua Acked-by: Eelco Chaudron Reviewed-by: Simon Horman Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

openvswitch: meter: fix race when getting now_ms.

2021-06-03T07:00:47+00:00

[ Upstream commit e4df1b0c24350a0f00229ff895a91f1072bd850d ] 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: 96fbc13d7e77 ("openvswitch: Add meter infrastructure") Signed-off-by: Tao Liu Suggested-by: Ilya Maximets Reviewed-by: Ilya Maximets Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

net: openvswitch: Constify static struct genl_small_ops

2020-10-05T04:13:36+00:00

The only usage of these is to assign their address to the small_ops field in the genl_family struct, which is a const pointer, and applying ARRAY_SIZE() on them. Make them const to allow the compiler to put them in read-only memory. Signed-off-by: Rikard Falkeborn Signed-off-by: David S. Miller

genetlink: move to smaller ops wherever possible

2020-10-03T02:11:11+00:00

Bulk of the genetlink users can use smaller ops, move them. Signed-off-by: Jakub Kicinski Reviewed-by: Johannes Berg Signed-off-by: David S. Miller

net: openvswitch: use div_u64() for 64-by-32 divisions

2020-04-26T03:48:21+00:00

Compile the kernel for arm 32 platform, the build warning found. To fix that, should use div_u64() for divisions. | net/openvswitch/meter.c:396: undefined reference to `__udivdi3' [add more commit msg, change reported tag, and use div_u64 instead of do_div by Tonghao] Fixes: e57358873bb5d6ca ("net: openvswitch: use u64 for meter bucket") Reported-by: kbuild test robot Signed-off-by: Tonghao Zhang Tested-by: Tonghao Zhang Signed-off-by: David S. Miller

net: openvswitch: suitable access to the dp_meters

2020-04-26T03:48:21+00:00

To fix the following sparse warning: | net/openvswitch/meter.c:109:38: sparse: sparse: incorrect type | in assignment (different address spaces) ... | net/openvswitch/meter.c:720:45: sparse: sparse: incorrect type | in argument 1 (different address spaces) ... Reported-by: kbuild test robot Signed-off-by: Tonghao Zhang Signed-off-by: David S. Miller

net: openvswitch: use u64 for meter bucket

2020-04-24T01:26:11+00:00

When setting the meter rate to 4+Gbps, there is an overflow, the meters don't work as expected. Cc: Pravin B Shelar Cc: Andy Zhou Signed-off-by: Tonghao Zhang Acked-by: Pravin B Shelar Signed-off-by: David S. Miller

net: openvswitch: make EINVAL return value more obvious

2020-04-24T01:26:11+00:00

Cc: Pravin B Shelar Cc: Andy Zhou Signed-off-by: Tonghao Zhang Acked-by: Pravin B Shelar Signed-off-by: David S. Miller

net: openvswitch: remove the unnecessary check

2020-04-24T01:26:11+00:00

Before invoking the ovs_meter_cmd_reply_stats, "meter" was checked, so don't check it agin in that function. Cc: Pravin B Shelar Cc: Andy Zhou Signed-off-by: Tonghao Zhang Acked-by: Pravin B Shelar Signed-off-by: David S. Miller

net: openvswitch: set max limitation to meters

2020-04-24T01:26:11+00:00

Don't allow user to create meter unlimitedly, which may cause to consume a large amount of kernel memory. The max number supported is decided by physical memory and 20K meters as default. Cc: Pravin B Shelar Cc: Andy Zhou Signed-off-by: Tonghao Zhang Acked-by: Pravin B Shelar Signed-off-by: David S. Miller