This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- groovy' to 'verification-done-groovy'. If the problem still exists, change the tag 'verification-needed-groovy' to 'verification-failed- groovy'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-groovy -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1901842 Title: Ubuntu 20.04 - multicast counter is not increased in ip -s Status in linux package in Ubuntu: Invalid Status in linux source package in Focal: Fix Committed Status in linux source package in Groovy: Fix Committed Status in linux source package in Hirsute: Invalid Bug description: [Impact] on a mlx5 device rx-mcast counter is not increased in ip -s after receiving mcast packets. Rx-packets counter is increased normally. [test case] send multicast packets to a mlx5 device using mcast address (like 224.0.0.1) # iperf --client 224.0.0.1 -u --bind 15.194.5.1 see that before and after sending the mcast counter remains the same before: # ip -s l show ens5f0 10: ens5f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether ec:0d:9a:d4:2d:fc brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 1350216 893 0 0 0 0 TX: bytes packets errors dropped carrier collsns 16221 94 0 0 0 0 after # ip -s l show ens5f0 10: ens5f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether ec:0d:9a:d4:2d:fc brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 2700432 1786 0 0 0 0 TX: bytes packets errors dropped carrier collsns 16221 94 0 0 0 0 [Fix] The issue is solved with upstream commit: commit 47c97e6b10a1e3680cad539929da092bfa535446 Author: Ron Diskin <ro...@mellanox.com> Date: Sun May 10 14:39:51 2020 +0300 net/mlx5e: Fix multicast counter not up-to-date in "ip -s" Currently the FW does not generate events for counters other than error counters. Unlike ".get_ethtool_stats", ".ndo_get_stats64" (which ip -s uses) might run in atomic context, while the FW interface is non atomic. Thus, 'ip' is not allowed to issue FW commands, so it will only display cached counters in the driver. Add a SW counter (mcast_packets) in the driver to count rx multicast packets. The counter also counts broadcast packets, as we consider it a special case of multicast. Use the counter value when calling "ip -s"/"ifconfig". Fixes: f62b8bb8f2d3 ("net/mlx5: Extend mlx5_core to support ConnectX-4 Ethernet functionality") Signed-off-by: Ron Diskin <ro...@mellanox.com> Reviewed-by: Tariq Toukan <tar...@mellanox.com> Reviewed-by: Moshe Shemesh <mo...@mellanox.com> Signed-off-by: Saeed Mahameed <sae...@mellanox.com> after applying this patch the mcast counter is increased. before sending mcast packets # ip -s l show ens5f0 10: ens5f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether ec:0d:9a:d4:2d:fc brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 0 0 0 0 0 0 TX: bytes packets errors dropped carrier collsns 7182 41 0 0 0 0 after sending mcast packets # ip -s l show ens5f0 10: ens5f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether ec:0d:9a:d4:2d:fc brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 1350216 893 0 0 0 893 TX: bytes packets errors dropped carrier collsns 9860 58 0 0 0 0 The patch is applied with 2 rejected hunks that need to be inserted manually with no changes. [Regression Potential] Regression risk is low since this patch is small and inserts only minor changes to the statistics mechanism. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1901842/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
