• Vladimir Oltean's avatar
    net: dsa: sja1105: support flow-based redirection via virtual links · dfacc5a2
    Vladimir Oltean authored
    Implement tc-flower offloads for redirect, trap and drop using
    non-critical virtual links.
    
    Commands which were tested to work are:
    
      # Send frames received on swp2 with a DA of 42:be:24:9b:76:20 to the
      # CPU and to swp3. This type of key (DA only) when the port's VLAN
      # awareness state is off.
      tc qdisc add dev swp2 clsact
      tc filter add dev swp2 ingress flower skip_sw dst_mac 42:be:24:9b:76:20 \
              action mirred egress redirect dev swp3 \
              action trap
    
      # Drop frames received on swp2 with a DA of 42:be:24:9b:76:20, a VID
      # of 100 and a PCP of 0.
      tc filter add dev swp2 ingress protocol 802.1Q flower skip_sw \
              dst_mac 42:be:24:9b:76:20 vlan_id 100 vlan_prio 0 action drop
    
    Under the hood, all rules match on DMAC, VID and PCP, but when VLAN
    filtering is disabled, those are set internally by the driver to the
    port-based defaults. Because we would be put in an awkward situation if
    the user were to change the VLAN filtering state while there are active
    rules (packets would no longer match on the specified keys), we simply
    deny changing vlan_filtering unless the list of flows offloaded via
    virtual links is empty. Then the user can re-add new rules.
    Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    dfacc5a2
sja1105_flower.c 11.2 KB