Corey Hickey wrote:
Patrick McHardy wrote:
These patches add support for external classifiers to SFQ and add a
new "flow" classifier, which can do hashing based on user-specified
keys or deterministic mapping of keys to classes. Additionally there
is a patch to make the SFQ queues visisble as classes to verify that
the hash is indeed doing something useful and a patch to consifiy
struct tcf_ext_map, which I had queued in the same tree.

Excellent! I'm glad this is applied. I'm having trouble figuring out how
it works, though. As a test, I'm trying to set up SFQ equivalent to
ESFQ's "hash dst". Here's what I do, and this is what I get:

------------------------------------------------------------------------
# ./tc qdisc add dev eth0 root handle 1: sfq
# ./tc filter add dev eth0 parent 1: flow hash keys dst
RTNETLINK answers: Invalid argument
We have an error talking to the kernel
------------------------------------------------------------------------

I've tried a few different keys with the same results. I don't know what
I'm doing wrong, or even where to start figuring it out. Can you point
me in the right direction?


You're missing protocol, handle etc. Try something like this:

tc filter add dev eth0 protocol ip pref 1 parent 1: handle 1 \
        flow hash keys dst divisor 1024

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