• Rahul Lakkireddy's avatar
    cxgb4: add TC-MATCHALL classifier egress offload · 4ec4762d
    Rahul Lakkireddy authored
    Add TC-MATCHALL classifier offload with TC-POLICE action applied for
    all outgoing traffic on the underlying interface. Split flow block
    offload to support both egress and ingress classification.
    
    For example, to rate limit all outgoing traffic to 1 Gbps:
    
    $ tc qdisc add dev enp2s0f4 clsact
    $ tc filter add dev enp2s0f4 egress matchall skip_sw \
    	action police rate 1Gbit burst 8Kbit
    
    Note that skip_sw is important. Otherwise, both stack and hardware
    will end up doing policing. Policing can't be shared across flow
    blocks. Only 1 egress matchall rule can be active at a time on the
    underlying interface.
    
    v5:
    - No change.
    
    v4:
    - Removed check to reject police offload if prio is not 1.
    - Moved TC_SETUP_BLOCK code to separate function.
    
    v3:
    - Added check to reject police offload if prio is not 1.
    - Assign block_shared variable only for TC_SETUP_BLOCK.
    
    v2:
    - Added check to reject flow block sharing for policers.
    Signed-off-by: default avatarRahul Lakkireddy <rahul.lakkireddy@chelsio.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    4ec4762d
cxgb4_tc_mqprio.c 16.4 KB