LARTC - Apr 2006 - created new q_disc, inserted module, tc tells me unknown qdisc

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/include/
-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

To debug this you''ll probably want to have a look at the
get_qdisc_kind() routine in tc/tc.c in the iproute sources and
understand how it uses dlopen() to find the routines to parse the
arguments to the various different qdisc implementations..

I hope this helps.


Is your xcp-implementing qdisc code available anywhere yet?  Are you
using the same packet format as the folks at ISI are using in their
FreeBSD implementation?  (They wrote a internet draft describing the
XCP packet format a year or two ago.)

			-Tim Shepard
			 shep@alum.mit.edu

Hey Tim,

I will take a look at that routine, it just seems no matter what I do I 
cannot seem to find out why it determines it does not have xcp qdisc 
support.  I will look deeper into it.

I am not sure if it has been released to the public yet.  I am using 
Yongguang Zhang and Tom Henderson''s Linux implementation.  I am also
not
sure it is the same packet formated as the ISI FreeBSD implementation. 
Tom pre-released it to me for my research on the topic, I think I will 
ask him if it is public yet, because if so I think I could find help a 
lot easier :)

I will get back to you with what I find.

Thanks!
George


Tim Shepard wrote:
> To debug this you''ll probably want to have a look at the
> get_qdisc_kind() routine in tc/tc.c in the iproute sources and
> understand how it uses dlopen() to find the routines to parse the
> arguments to the various different qdisc implementations..
> 
> I hope this helps.
> 
> 
> Is your xcp-implementing qdisc code available anywhere yet?  Are you
> using the same packet format as the folks at ISI are using in their
> FreeBSD implementation?  (They wrote a internet draft describing the
> XCP packet format a year or two ago.)
> 
> 			-Tim Shepard
> 			 shep@alum.mit.edu
>

On Mon, 10 Apr 2006 21:41:39 -0400 (EDT)
"George P Nychis" <gnychis@cmu.edu> 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/include/
-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
> 
The .so needs to go in /usr/lib/tc (assuming you are running relatively recent
version
of iproute2 tools).

Read source to tc.c where it calls dlopen.

> On Mon, 10 Apr 2006 21:41:39 -0400 (EDT) "George P Nychis"
> <gnychis@cmu.edu> 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
>> 
> 
> The .so needs to go in /usr/lib/tc (assuming you are running relatively
> recent version of iproute2 tools).
> 
> Read source to tc.c where it calls dlopen.
> 
> 
Still didn''t seem to solve the problem :\

In my tc.c i have:
   snprintf(buf, sizeof(buf), "/usr/lib/tc/q_%s.so", str);

Also:
lanthanum-ini tc # ls /usr/lib/tc
experimental.dist  normal.dist  pareto.dist  paretonormal.dist  q_netem.so 
q_xcp.so

And finally:
lanthanum-ini tc # tc qdisc add dev ath0 root xcp capacity 54Mbit limit 500
Unknown qdisc "xcp", hence option "capacity" is unparsable

Maybe i should add debugging in tc.c and see if it sees the .so and fails to
load it or something.

Any other suggestions?

Thanks for all the responses,
George

I am getting closer...

I added debugging, and noticed that it looks for:
       snprintf(buf, sizeof(buf), "%s_qdisc_util", str);

However in q_xcp.c it had:
       struct qdisc_util xcp_util = {

so I changed that to xcp_qdisc_util, and now i run tc:
lanthanum-ini tc # tc qdisc add dev ath0 root xcp capacity 54Mbit limit 100
Segmentation fault

This happens on this line:
 q = dlsym(dlh, buf);

Since this is very hard for people to help me without the source code, i did ask
the author if it has been release publically and am waiting for a response.  In
the meantime, it seems as though maybe instead of trying to get this to work
with a newer version of tc, i should install an old version of tc that the
module was original made for.

Though if anyone else has ideas let me know.

Thanks for all the help

- George

>> On Mon, 10 Apr 2006 21:41:39 -0400 (EDT) "George P Nychis" 
>> <gnychis@cmu.edu> 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/i
>>> nc lude/ 
>>>
-I/var/tmp/portage/iproute2-2.6.11.20050310-r1/work/iproute2-2.6.11/t
>>> c_ 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
>>> 
>> 
>> The .so needs to go in /usr/lib/tc (assuming you are running relatively
>>  recent version of iproute2 tools).
>> 
>> Read source to tc.c where it calls dlopen.
>> 
>> 
> 
> Still didn''t seem to solve the problem :\
> 
> In my tc.c i have: snprintf(buf, sizeof(buf),
"/usr/lib/tc/q_%s.so", str);
> 
> 
> Also: lanthanum-ini tc # ls /usr/lib/tc experimental.dist  normal.dist
> pareto.dist  paretonormal.dist  q_netem.so  q_xcp.so
> 
> And finally: lanthanum-ini tc # tc qdisc add dev ath0 root xcp capacity
> 54Mbit limit 500 Unknown qdisc "xcp", hence option
"capacity" is
> unparsable
> 
> Maybe i should add debugging in tc.c and see if it sees the .so and fails
> to load it or something.
> 
> Any other suggestions?
> 
> Thanks for all the responses, George
> 
> _______________________________________________ LARTC mailing list 
> LARTC@mailman.ds9a.nl 
> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
> 
> 

--

> Maybe i should add debugging in tc.c and see if it sees the .so and fails
to load it or something.
Yes.   I would do that next.

Compile tc with -g and then run it under gdb and step through that
part to see what happens.

			-Tim Shepard
			 shep@alum.mit.edu

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/include/
-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

> 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 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

> 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
> 
> 
I think what I''m most confused about this pkt_sched.h thing is that the
code works with version 2.4.7 of iproute2 ... in 2.4.7 of iproute2 there is no
pkt_sched.h anywhere to be found in the source code.

However in the newest version of iproute2 which I am trying to get this
functionality to work in, there is a pkt_sched.h

My last observation, is that in q_xcp.h it includes pkt_sched_xcp.h which has:
struct tc_xcp_qopt
{
        __u32   first_param;  
        __u32   second_param;
};

So I am assuming i need to add something like the enum thing to pkt_sched.h in
the new iproute2 source... however what are the proper names I need to use in
the enum?  I don''t expect you to know the names, however, what do i
match them with?

Thanks!
George



--