netdev - testing crazy stuff with iproute2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20071226045037.M75814@visp.net.lb>
Date:	Wed, 26 Dec 2007 06:57:42 +0200
From:	"Denys Fedoryshchenko" <denys@...p.net.lb>
To:	netdev@...r.kernel.org
Subject: testing crazy stuff with iproute2

I did rules:

tc qdisc        del dev eth0 root
tc qdisc        add dev eth0 handle 1: root htb

tc class        add dev eth0 parent 1:0 classid 1:2 htb rate 100Mbit ceil 
100Mbit quantum 1514
tc qdisc        add dev eth0 handle 2: parent 1:2 sfq

tc class        add dev eth0 parent 1:0 classid 1:3 htb rate 100Mbit ceil 
100Mbit quantum 1514
tc qdisc        add dev eth0 parent 1:3 handle 3: est 1sec 8sec tbf buffer 
1024kb latency 500ms rate 10240 peakrate 1024000 mtu 1500
tc qdisc        add dev eth0 parent 3:1 handle 30 pfifo limit 1

tc filter       add dev eth0 parent 1:0 protocol ip prio 5 u32 match ip src 
192.168.1.1/32 flowid 1:3

Probably it must not work at all (attaching tbf), but it works as expected in 
my understanding.

classid 1:2 just fake, not used at all
classid 1:3 is created, because i want to use tbf multiple times. 
I like burst introduced in TBF, and seems burst/cburst in HTB not doing same 
job, at least i had some difficulties with them (will research more).

filter don't want to attach with parent 3:0 or 3:1, so i had to attach it to 
1:3. It works fine, but i have to put high value in ceil to not be limited by 
htb. TBF working as expected. When rate-limit in TBF reached, it is queueing 
buffer in qdisc with handle 30

But i got few times in dmesg, during tests (probably when i set sfq instead 
pfifo, or etc).

[2090816.116000] htb: class 10003 isn't work conserving ?!

Is it a bug? And does it worth to do such "shaper"?

--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html