On 02/11/2021 01:53, Vladimir Oltean wrote:
On Mon, Nov 01, 2021 at 07:01:19PM +0200, Grygorii Strashko wrote:Hi This series first adds supports for the ALE feature to rate limit number ingress broadcast(BC)/multicast(MC) packets per/sec which main purpose is BC/MC storm prevention. And then enables corresponding support for ingress broadcast(BC)/multicast(MC) packets rate limiting for TI CPSW switchdev and AM65x/J221E CPSW_NUSS drivers by implementing HW offload for simple tc-flower with policer action with matches on dst_mac: - ff:ff:ff:ff:ff:ff has to be used for BC packets rate limiting - 01:00:00:00:00:00 fixed value has to be used for MC packets rate limiting Examples: - BC rate limit to 1000pps: tc qdisc add dev eth0 clsact tc filter add dev eth0 ingress flower skip_sw dst_mac ff:ff:ff:ff:ff:ff \ action police pkts_rate 1000 pkts_burst 1 - MC rate limit to 20000pps: tc qdisc add dev eth0 clsact tc filter add dev eth0 ingress flower skip_sw dst_mac 01:00:00:00:00:00 \ action police pkts_rate 10000 pkts_burst 1 pkts_burst - not used. The solution inspired patch from Vladimir Oltean [1]. Changes in v2: - switch to packet-per-second policing introduced by commit 2ffe0395288a ("net/sched: act_police: add support for packet-per-second policing") [2] v1: https://patchwork.kernel.org/project/netdevbpf/cover/20201114035654.32658-1-grygorii.strashko@xxxxxx/ [1] https://lore.kernel.org/patchwork/patch/1217254/ [2] https://patchwork.kernel.org/project/netdevbpf/cover/20210312140831.23346-1-simon.horman@xxxxxxxxxxxxx/ Grygorii Strashko (3): drivers: net: cpsw: ale: add broadcast/multicast rate limit support net: ethernet: ti: am65-cpsw: enable bc/mc storm prevention support net: ethernet: ti: cpsw_new: enable bc/mc storm prevention support drivers/net/ethernet/ti/am65-cpsw-qos.c | 145 ++++++++++++++++++++ drivers/net/ethernet/ti/am65-cpsw-qos.h | 8 ++ drivers/net/ethernet/ti/cpsw_ale.c | 66 +++++++++ drivers/net/ethernet/ti/cpsw_ale.h | 2 + drivers/net/ethernet/ti/cpsw_new.c | 4 +- drivers/net/ethernet/ti/cpsw_priv.c | 170 ++++++++++++++++++++++++ drivers/net/ethernet/ti/cpsw_priv.h | 8 ++ 7 files changed, 402 insertions(+), 1 deletion(-) -- 2.17.1I don't think I've asked this for v1, but when you say multicast storm control, does the hardware police just unknown multicast frames, or all multicast frames?
packets per/sec rate limiting is affects all MC or BC packets once enabled. -- Best regards, grygorii
