On 5/8/20 1:02 AM, Po Liu wrote: > Introduce a ingress frame gate control flow action. > Tc gate action does the work like this: > Assume there is a gate allow specified ingress frames can pass at > specific time slot, and also drop at specific time slot. Tc filter > chooses the ingress frames, and tc gate action would specify what slot > does these frames can be passed to device and what time slot would be > dropped. > Tc gate action would provide an entry list to tell how much time gate > keep open and how much time gate keep state close. Gate action also > assign a start time to tell when the entry list start. Then driver would > repeat the gate entry list cyclically. > For the software simulation, gate action require the user assign a time > clock type. > > Below is the setting example in user space. Tc filter a stream source ip > address is 192.168.0.20 and gate action own two time slots. One is last > 200ms gate open let frame pass another is last 100ms gate close let > frames dropped. > > # tc qdisc add dev eth0 ingress > # tc filter add dev eth0 parent ffff: protocol ip \ > > flower src_ip 192.168.0.20 \ > action gate index 2 clockid CLOCK_TAI \ > sched-entry open 200000000ns -1 8000000b \ > sched-entry close 100000000ns > > # tc chain del dev eth0 ingress chain 0 > > "sched-entry" follow the name taprio style. Gate state is > "open"/"close". Follow the period nanosecond. Then next -1 is internal > priority value means which ingress queue should put to. "-1" means > wildcard. The last value optional specifies the maximum number of > MSDU octets that are permitted to pass the gate during the specified > time interval, the overlimit frames would be dropped. > > Below example shows filtering a stream with destination mac address is > 10:00:80:00:00:00 and ip type is ICMP, follow the action gate. The gate > action would run with one close time slot which means always keep close. > The time cycle is total 200000000ns. The base-time would calculate by: > > 1357000000000 + (N + 1) * cycletime > > When the total value is the future time, it will be the start time. > The cycletime here would be 200000000ns for this case. > > #tc filter add dev eth0 parent ffff: protocol ip \ > flower skip_hw ip_proto icmp dst_mac 10:00:80:00:00:00 \ > action gate index 12 base-time 1357000000000ns \ > sched-entry CLOSE 200000000ns \ > clockid CLOCK_TAI > > Signed-off-by: Po Liu <[email protected]> > --- >
applied to iproute2-next. Thanks,
