Re: [LARTC] created new q_disc, inserted module, tc tells me unknown

From: gypsy <gypsy@iswest.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] created new q_disc, inserted module, tc tells me unknown
Date: Wed, 12 Apr 2006 15:02:01 +0000	[thread overview]
Message-ID: <443D1669.F3230B30@iswest.com> (raw)
In-Reply-To: <1737.128.2.140.234.1144719887.squirrel@128.2.140.234>

George P Nychis wrote:
> 
> > George P Nychis wrote:
> >>
> >> Hi,
> >>
> >> I am trying to install a proprietary qdisc made for research, it is not
> >> publically released yet, however its been used several times so i know
> >> it works.
> >>
> >> The files included are: q_xcp.c: static int xcp_parse_opt() static int
> >> xcp_print_opt() static int xcp_print_xstats() struct qdisc_util xcp_util
> >> = { "NULL", "xcp" ..... };
> >>
> >> sch_xcp.c: static int xcp_enqueue() static int xcp_requeue() static struct
> >> sk_buff * xcp_dequeue() .... .... struct Qdisc_ops xcp_qdisc_ops ={
> >> NULL,NULL,"xcp",.... };
> >>
> >> printk(KERN_INFO "XCP qdisc module loaded.\n"); return
> >> register_qdisc(&xcp_qdisc_ops);
> >>
> >> So, i make everything successfully, it creates q_xcp.so and copies it
> >> to /usr/lib and sch_xcp.o which it copies to /lib/modules/... so then I
> >> "insmod sch_xcp" and i see in dmesg: "XCP qdisc module loaded."
> >>
> >> I then try: "tc qdisc add dev eth0 root xcp capacity 10Mbit limit 500"
> >> and get: "Unknown qdisc "xcp", hence option "capacity" is unparsable"
> >>
> >> So then I read the INSTALL further to find some sort of solution and it
> >> mentions: This again assumes "tc" version is 2.4.7.  If your "tc" is a
> >> different version, download the iproute2 source code, and edit Makefile
> >> to point "TC_INCLUDE" to "-I..../iproute2/include -I..../iproute2/tc"
> >>
> >> So, i did that, and i recompiled the q_xcp.so: lanthanum-ini src-1.0.1 #
> >> make q_xcp.so cc -O2 -fPIC
> >> -I/var/tmp/portage/iproute2-2.6.11.20050310-r1/work/iproute2-2.6.11/inc
> >> lude/
> >> -I/var/tmp/portage/iproute2-2.6.11.20050310-r1/work/iproute2-2.6.11/tc_
> >> include -o q_xcp.o -c q_xcp.c ld -shared -o q_xcp.so q_xcp.o rm -f
> >> q_xcp.o
> >>
> >> But i still get the same error.... so then my very final last effort
> >> was to move q_xcp.c to my iproute2 source code tc/ directory and added
> >> this to the makefile: TCMODULES += q_xcp.o
> >>
> >> Then I compiled tc, and i check tc to see if the xcp qdisc functions
> >> were loaded: lanthanum-ini tc # nm tc | grep xcp 080531ec t xcp_parse_opt
> >>  080533e0 t xcp_print_opt 08053426 t xcp_print_xstats 08070cc0 D xcp_util
> >>
> >>
> >> And finally: lanthanum-ini tc # ./tc qdisc add dev ath0 root xcp
> >> capacity 54Mbit limit 500 Unknown qdisc "xcp", hence option "capacity"
> >> is unparsable
> >>
> >> I have no clue :(  I figured that putting the .so into /usr/lib would
> >> have been enough.  Sorry for the long e-mail, I hope someone can help,
> >> and thank you for your time even if you don't know the solution but
> >> read this :)
> >>
> >> - George
> >
> > George,
> >
> > Please show us iproute/include/linux/pkt_sched.h
> >
> > There shouldn't be anything there the author wishes to keep private. --
> > gypsy
> >
> >
> 
> They did not include the iproute source code that they used... they only included the q_xcp.c to create the q_xcp.so ... therefore my pkt_sched.h i am using is from this build: iproute2-2.6.11.20050310-r1
> 
> I can certainly post it if you need, just let me know

George,

Then you probably need to revert to an iproute2 source that included
xcp.  In pkt_sched.h you need a struct that defines the parameters xcp
can accept:

enum
{
  TCA_XCP_PARM1,
  TCA_XCP_PARM2,
  TCA_XCP_PARM3,
};

and in ~/tc/Makefile you need TCMODULES += q_xcp.o
--
gypsy
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