Subject: Re: tc rsvp filter show broke

From: Jamal Hadi Salim <[email-masked]>
Date: Fri, 26 Sep 2014 18:48:13 -0400

On 09/26/14 13:41, John Fastabend wrote:
> Hi Jamal,
>
> Here is another strange 'tc' result that I think is a
> bug. If it was intended I can't see why. Show filter
> commands on rsvp classifiers only list the first entry?
>

Hrm  - poking inside there and this seems to be one of those
classifiers that hasnt been getting a lot of love. Doesnt
support actions well for example.

It seems to work for me:
----------
/sbin/tc -V
tc utility, iproute2-ss140610

uname -a
Linux jhs-1 3.16.0-rc2+ #4 SMP Fri Aug 29 11:13:53 EDT 2014 x86_64 
x86_64 x86_64 GNU/Linux

sudo /sbin/tc qdisc add dev eth0 root handle 1:0 prio
sudo /sbin/tc filter add dev eth0 pref 10 proto ip parent 1:0 rsvp 
session 10.0.0.1 ipproto icmp classid 1:1  police rate 1kbit burst 90k 
conform-exceed drop/ok
/sbin/tc -s filter show dev eth0 parent 1:0
filter protocol ip pref 10 rsvp
filter protocol ip pref 10 rsvp fh 0x0001100a flowid 1:1 session 
10.0.0.1 ipproto icmp
  Sent 0 bytes 0 pkts (dropped 0, overlimits 0)

Now lets send a fast ping:
sudo ping -f 10.0.0.1 -c 10000
.......
10000 packets transmitted, 386 received, 96% packet loss, time 115495ms
rtt min/avg/max/mdev = 0.300/0.499/1.262/0.164 ms, ipg/ewma 11.550/0.463 ms

/sbin/tc -s filter show dev eth0 parent 1:0
filter protocol ip pref 10 rsvp
filter protocol ip pref 10 rsvp fh 0x0001100a flowid 1:1 session 
10.0.0.1 ipproto icmp
  Sent 980000 bytes 10000 pkts (dropped 9614, overlimits 9614)

cheers,
jamal