I would like to use sfq in a htb class with a custom hashing (flow hash or flow map).
SFQ with custom hasing works,
1. tc qdisc add dev eth0 root sfq perturb 10
2. tc add filter dev eth0 handle 1 flow hash keys src perturb 10 divisor 1024
or
2. tc add filter dev eth0 handle 1 flow map key src and 0x000000ff
When I add the sfq qdisc to an htb class and try to do 2. I get no error from tc (and the kernel)
but the filter does not get added. There is no filter in tc -s filter show dev eth0 .
The commands:
tc qdisc add dev eth0 root handle 9001: htb default 20
tc class add dev eth0 parent 9001: classid 9001:1 htb rate 4mbit burst 15k
tc class add dev eth0 parent 9001:1 classid 9001:10 htb rate 3mbit
tc class add dev eth0 parent 9001:1 classid 9001:20 htb rate 1mbit
tc qdisc add dev eth0 parent 9001:10 sfq perturb 10
tc filter add dev eth0 parent 9002: handle 1 flow map key src and 0x000000ff
(where 9002: is the class of the sfq qdisc)
I also tried with a basic filter (tc filter add .. parent 9002: basic ...) and same result.
I added printk in cls_api.c, cls_flow.c, sch_api.c to see what was going on. Linux kernel version
3.13.0 (this is the version installed in the embedded system I am working on).
No errors are generated. The class op ->change() returns with err = 0.
Anyone ?
P.S. adding "handle 1" in tc filter add ... flow ... is something that is not well documented.
If tc filter add ... flow ... is run with handle 1 it returns with error but does not says anything.
Thanks
Andrea
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