Re: 2.4.32: unresolved symbol unregister_qdisc

Re: 2.4.32: unresolved symbol unregister_qdisc

[David S. Miller]

From: "George P Nychis" <gnychis@cmu.edu>
Date: Sat, 8 Apr 2006 18:47:34 -0400 (EDT)

> Hey,
> 
> I have a kernel module that uses unregister_qdisc and register_qdisc, whenever i try to insert the module I get:
> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol unregister_qdisc
> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol register_qdisc
> 
> Am i missing some sort of support in the kernel?

Make sure CONFIG_NET_SCHED is enabled and that you compiled your module against
that kernel.

Where does this sch_xcp come from?  It's not in the vanilla sources.

Also, please direct networking questions to the netdev@vger.kernel.org
mailing list which I have added to the CC:.

Re: 2.4.32: unresolved symbol unregister_qdisc

[George P Nychis]

Yeah, this module is unfortunately not under the GPL, it was made for research and i am not the author, I was only given the code for my own research.

I enabled that support in the kernel, and then tried to recompile and get tons of errors/warnings... so maybe I am missing something else to be enabled in the kernel... here are a few examples of errors:
/usr/include/linux/skbuff.h:30:26: net/checksum.h: No such file or directory
/usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or directory
/usr/include/linux/irq.h:72: error: `NR_IRQS' undeclared here (not in a function)
/usr/include/asm/hw_irq.h:28: error: `NR_IRQ_VECTORS' undeclared here (not in a function)

I think those are the top most errors, so if i can fix those hopefully the rest shall vanish!

- George


> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr 2006 18:47:34
> -0400 (EDT)
> 
>> Hey,
>> 
>> I have a kernel module that uses unregister_qdisc and register_qdisc,
>> whenever i try to insert the module I get: 
>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
>> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
>> register_qdisc
>> 
>> Am i missing some sort of support in the kernel?
> 
> Make sure CONFIG_NET_SCHED is enabled and that you compiled your module
> against that kernel.
> 
> Where does this sch_xcp come from?  It's not in the vanilla sources.
> 
> Also, please direct networking questions to the netdev@vger.kernel.org 
> mailing list which I have added to the CC:.
> 
> 


-- 

Re: 2.4.32: unresolved symbol unregister_qdisc

[Randy.Dunlap]

On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis wrote:

> Yeah, this module is unfortunately not under the GPL, it was made for research and i am not the author, I was only given the code for my own research.
> 
> I enabled that support in the kernel, and then tried to recompile and get tons of errors/warnings... so maybe I am missing something else to be enabled in the kernel... here are a few examples of errors:
> /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such file or directory
> /usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or directory
> /usr/include/linux/irq.h:72: error: `NR_IRQS' undeclared here (not in a function)
> /usr/include/asm/hw_irq.h:28: error: `NR_IRQ_VECTORS' undeclared here (not in a function)
> 
> I think those are the top most errors, so if i can fix those hopefully the rest shall vanish!

Looks like a Makefile problem then.  Can you post the Makefile?
Hopefully it is using a Makefile and not just an elaborate gcc command line.

[and please don't top-post]

> - George
> 
> 
> > From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr 2006 18:47:34
> > -0400 (EDT)
> > 
> >> Hey,
> >> 
> >> I have a kernel module that uses unregister_qdisc and register_qdisc,
> >> whenever i try to insert the module I get: 
> >> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> >> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
> >> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> >> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
> >> register_qdisc
> >> 
> >> Am i missing some sort of support in the kernel?
> > 
> > Make sure CONFIG_NET_SCHED is enabled and that you compiled your module
> > against that kernel.
> > 
> > Where does this sch_xcp come from?  It's not in the vanilla sources.
> > 
> > Also, please direct networking questions to the netdev@vger.kernel.org 
> > mailing list which I have added to the CC:.

---
~Randy

Re: 2.4.32: unresolved symbol unregister_qdisc

[George P Nychis]

Thanks for the help.

Here is the makefile:
http://rafb.net/paste/results/auchPH75.html

And here is the full errors I receive:
http://rafb.net/paste/results/Qplpqw74.html

Greatly appreciate it

- George


> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis wrote:
> 
>> Yeah, this module is unfortunately not under the GPL, it was made for
>> research and i am not the author, I was only given the code for my own
>> research.
>> 
>> I enabled that support in the kernel, and then tried to recompile and
>> get tons of errors/warnings... so maybe I am missing something else to
>> be enabled in the kernel... here are a few examples of errors: 
>> /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such file or
>> directory /usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or
>> directory /usr/include/linux/irq.h:72: error: `NR_IRQS' undeclared here
>> (not in a function) /usr/include/asm/hw_irq.h:28: error:
>> `NR_IRQ_VECTORS' undeclared here (not in a function)
>> 
>> I think those are the top most errors, so if i can fix those hopefully
>> the rest shall vanish!
> 
> Looks like a Makefile problem then.  Can you post the Makefile? Hopefully
> it is using a Makefile and not just an elaborate gcc command line.
> 
> [and please don't top-post]
> 
>> - George
>> 
>> 
>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr 2006
>>> 18:47:34 -0400 (EDT)
>>> 
>>>> Hey,
>>>> 
>>>> I have a kernel module that uses unregister_qdisc and
>>>> register_qdisc, whenever i try to insert the module I get: 
>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
>>>> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
>>>> register_qdisc
>>>> 
>>>> Am i missing some sort of support in the kernel?
>>> 
>>> Make sure CONFIG_NET_SCHED is enabled and that you compiled your
>>> module against that kernel.
>>> 
>>> Where does this sch_xcp come from?  It's not in the vanilla sources.
>>> 
>>> Also, please direct networking questions to the
>>> netdev@vger.kernel.org mailing list which I have added to the CC:.
> 
> --- ~Randy
> 
> 


-- 

Re: 2.4.32: unresolved symbol unregister_qdisc

[Randy.Dunlap]

On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:

> Thanks for the help.
> 
> Here is the makefile:
> http://rafb.net/paste/results/auchPH75.html
> 
> And here is the full errors I receive:
> http://rafb.net/paste/results/Qplpqw74.html
> 
> Greatly appreciate it
> 
> - George

[repeat: please don't top-post]

I don't know how much I can help you.  It's been a long time since
I've built external modules on 2.4.x.

Problems that I see:
- the Makefile does not use the expected 2.4 kernel build infrastructure;
- kernel Makefile uses -nostdinc to prevent use of userspace headers;
- Makefile is trying to include userspace headers instead of kernel headers, e.g.:
  In file included from /usr/include/linux/if_ether.h:107,
                 from /usr/include/linux/netdevice.h:29,
                 from sch_xcp.c:8:
- this specified include directory is only in 2.6.x, not 2.4.x:
  -I/lib/modules/`uname -r`/build/include/asm/mach-default

It's not clear to me how this makefile could work with 2.4.x at all.
Is it supposed to, or that's just what you want to see it do?

You could try to fix the Makefile based on makefile-changes articles at lwn.net.
E.g.:
http://lwn.net/Articles/151784/
http://lwn.net/Articles/79984/
http://lwn.net/Articles/74767/
http://lwn.net/Articles/69148/
http://lwn.net/Articles/21823/



> > On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis wrote:
> > 
> >> Yeah, this module is unfortunately not under the GPL, it was made for
> >> research and i am not the author, I was only given the code for my own
> >> research.
> >> 
> >> I enabled that support in the kernel, and then tried to recompile and
> >> get tons of errors/warnings... so maybe I am missing something else to
> >> be enabled in the kernel... here are a few examples of errors: 
> >> /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such file or
> >> directory /usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or
> >> directory /usr/include/linux/irq.h:72: error: `NR_IRQS' undeclared here
> >> (not in a function) /usr/include/asm/hw_irq.h:28: error:
> >> `NR_IRQ_VECTORS' undeclared here (not in a function)
> >> 
> >> I think those are the top most errors, so if i can fix those hopefully
> >> the rest shall vanish!
> > 
> > Looks like a Makefile problem then.  Can you post the Makefile? Hopefully
> > it is using a Makefile and not just an elaborate gcc command line.
> > 
> > [and please don't top-post]
> > 
> >> - George
> >> 
> >> 
> >>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr 2006
> >>> 18:47:34 -0400 (EDT)
> >>> 
> >>>> Hey,
> >>>> 
> >>>> I have a kernel module that uses unregister_qdisc and
> >>>> register_qdisc, whenever i try to insert the module I get: 
> >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
> >>>> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
> >>>> register_qdisc
> >>>> 
> >>>> Am i missing some sort of support in the kernel?
> >>> 
> >>> Make sure CONFIG_NET_SCHED is enabled and that you compiled your
> >>> module against that kernel.
> >>> 
> >>> Where does this sch_xcp come from?  It's not in the vanilla sources.
> >>> 
> >>> Also, please direct networking questions to the
> >>> netdev@vger.kernel.org mailing list which I have added to the CC:.

---
~Randy

Re: 2.4.32: unresolved symbol unregister_qdisc

[George P Nychis]

> On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:
> 
>> Thanks for the help.
>> 
>> Here is the makefile: http://rafb.net/paste/results/auchPH75.html
>> 
>> And here is the full errors I receive: 
>> http://rafb.net/paste/results/Qplpqw74.html
>> 
>> Greatly appreciate it
>> 
>> - George
> 
> [repeat: please don't top-post]
> 
> I don't know how much I can help you.  It's been a long time since I've
> built external modules on 2.4.x.
> 
> Problems that I see: - the Makefile does not use the expected 2.4 kernel
> build infrastructure; - kernel Makefile uses -nostdinc to prevent use of
> userspace headers; - Makefile is trying to include userspace headers
> instead of kernel headers, e.g.: In file included from
> /usr/include/linux/if_ether.h:107, from /usr/include/linux/netdevice.h:29,
>  from sch_xcp.c:8: - this specified include directory is only in 2.6.x,
> not 2.4.x: -I/lib/modules/`uname -r`/build/include/asm/mach-default
> 
> It's not clear to me how this makefile could work with 2.4.x at all. Is it
> supposed to, or that's just what you want to see it do?
> 
> You could try to fix the Makefile based on makefile-changes articles at
> lwn.net. E.g.: http://lwn.net/Articles/151784/ 
> http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/ 
> http://lwn.net/Articles/69148/ http://lwn.net/Articles/21823/
> 
> 
> 
>>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis wrote:
>>> 
>>>> Yeah, this module is unfortunately not under the GPL, it was made
>>>> for research and i am not the author, I was only given the code for
>>>> my own research.
>>>> 
>>>> I enabled that support in the kernel, and then tried to recompile
>>>> and get tons of errors/warnings... so maybe I am missing something
>>>> else to be enabled in the kernel... here are a few examples of
>>>> errors: /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such
>>>> file or directory /usr/include/asm/irq.h:16:25: irq_vectors.h: No
>>>> such file or directory /usr/include/linux/irq.h:72: error: `NR_IRQS'
>>>> undeclared here (not in a function) /usr/include/asm/hw_irq.h:28:
>>>> error: `NR_IRQ_VECTORS' undeclared here (not in a function)
>>>> 
>>>> I think those are the top most errors, so if i can fix those
>>>> hopefully the rest shall vanish!
>>> 
>>> Looks like a Makefile problem then.  Can you post the Makefile?
>>> Hopefully it is using a Makefile and not just an elaborate gcc command
>>> line.
>>> 
>>> [and please don't top-post]
>>> 
>>>> - George
>>>> 
>>>> 
>>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr 2006 
>>>>> 18:47:34 -0400 (EDT)
>>>>> 
>>>>>> Hey,
>>>>>> 
>>>>>> I have a kernel module that uses unregister_qdisc and 
>>>>>> register_qdisc, whenever i try to insert the module I get: 
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved
>>>>>> symbol unregister_qdisc
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved
>>>>>> symbol register_qdisc
>>>>>> 
>>>>>> Am i missing some sort of support in the kernel?
>>>>> 
>>>>> Make sure CONFIG_NET_SCHED is enabled and that you compiled your 
>>>>> module against that kernel.
>>>>> 
>>>>> Where does this sch_xcp come from?  It's not in the vanilla
>>>>> sources.
>>>>> 
>>>>> Also, please direct networking questions to the 
>>>>> netdev@vger.kernel.org mailing list which I have added to the
>>>>> CC:.
> 
> --- ~Randy
> 
> 

Sorry, I thought when you said top-post, I thought you were telling me about only posting the "top" most errors in my original e-mail, thats why i pasted full error output.


The thing is, it compiles successfully when CONFIG_NET_SCHED is not enabled in the kernel.  But when its not enabled, i get the external symbol errors.

As soon as I enable CONFIG_NET_SCHED ... it no longer compiles.

I will look into this, it is supposed to work... the code has been used by others before.

If you or anyone else come up with anything, please let me know

Thanks!
George

Re: 2.4.32: unresolved symbol unregister_qdisc

[Randy.Dunlap]

On Sun, 9 Apr 2006 22:05:33 -0400 (EDT) George P Nychis wrote:

> 
> > On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:
> > 
> >> Thanks for the help.
> >> 
> >> Here is the makefile: http://rafb.net/paste/results/auchPH75.html
> >> 
> >> And here is the full errors I receive: 
> >> http://rafb.net/paste/results/Qplpqw74.html
> >> 
> >> Greatly appreciate it
> >> 
> >> - George
> > 
> > [repeat: please don't top-post]
> > 
> > I don't know how much I can help you.  It's been a long time since I've
> > built external modules on 2.4.x.
> > 
> > Problems that I see: - the Makefile does not use the expected 2.4 kernel
> > build infrastructure; - kernel Makefile uses -nostdinc to prevent use of
> > userspace headers; - Makefile is trying to include userspace headers
> > instead of kernel headers, e.g.: In file included from
> > /usr/include/linux/if_ether.h:107, from /usr/include/linux/netdevice.h:29,
> >  from sch_xcp.c:8: - this specified include directory is only in 2.6.x,
> > not 2.4.x: -I/lib/modules/`uname -r`/build/include/asm/mach-default
> > 
> > It's not clear to me how this makefile could work with 2.4.x at all. Is it
> > supposed to, or that's just what you want to see it do?
> > 
> > You could try to fix the Makefile based on makefile-changes articles at
> > lwn.net. E.g.: http://lwn.net/Articles/151784/ 
> > http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/ 
> > http://lwn.net/Articles/69148/ http://lwn.net/Articles/21823/
> > 
> > 
> > 
> >>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis wrote:
> >>> 
> >>>> Yeah, this module is unfortunately not under the GPL, it was made
> >>>> for research and i am not the author, I was only given the code for
> >>>> my own research.
> >>>> 
> >>>> I enabled that support in the kernel, and then tried to recompile
> >>>> and get tons of errors/warnings... so maybe I am missing something
> >>>> else to be enabled in the kernel... here are a few examples of
> >>>> errors: /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such
> >>>> file or directory /usr/include/asm/irq.h:16:25: irq_vectors.h: No
> >>>> such file or directory /usr/include/linux/irq.h:72: error: `NR_IRQS'
> >>>> undeclared here (not in a function) /usr/include/asm/hw_irq.h:28:
> >>>> error: `NR_IRQ_VECTORS' undeclared here (not in a function)
> >>>> 
> >>>> I think those are the top most errors, so if i can fix those
> >>>> hopefully the rest shall vanish!
> >>> 
> >>> Looks like a Makefile problem then.  Can you post the Makefile?
> >>> Hopefully it is using a Makefile and not just an elaborate gcc command
> >>> line.
> >>> 
> >>> [and please don't top-post]
> >>> 
> >>>> - George
> >>>> 
> >>>> 
> >>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr 2006 
> >>>>> 18:47:34 -0400 (EDT)
> >>>>> 
> >>>>>> Hey,
> >>>>>> 
> >>>>>> I have a kernel module that uses unregister_qdisc and 
> >>>>>> register_qdisc, whenever i try to insert the module I get: 
> >>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved
> >>>>>> symbol unregister_qdisc
> >>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved
> >>>>>> symbol register_qdisc
> >>>>>> 
> >>>>>> Am i missing some sort of support in the kernel?
> >>>>> 
> >>>>> Make sure CONFIG_NET_SCHED is enabled and that you compiled your 
> >>>>> module against that kernel.
> >>>>> 
> >>>>> Where does this sch_xcp come from?  It's not in the vanilla
> >>>>> sources.
> >>>>> 
> >>>>> Also, please direct networking questions to the 
> >>>>> netdev@vger.kernel.org mailing list which I have added to the
> >>>>> CC:.
> > 
> > --- ~Randy
> > 
> > 
> 
> By the way, if I add -I/usr/src/linux/include to the compile line, it successfully compiles, however, i am back to the start:
> lanthanum-ini src-1.0.1 # insmod sch_xcp
> Using /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o
> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol unregister_qdisc
> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol register_qdisc

Yet your 2.4.32 kernel image file does have those symbols in it?
Can you verify that by using 'nm' on the kernel image file?

If so, then I suppose that you'll need to make a small module test case
that exhibits this behavior, or just tell us where to get the sch_xcp files...

(re-added cc: for netdev)

---
~Randy

Re: 2.4.32: unresolved symbol unregister_qdisc

[George P Nychis]

> On Sun, 9 Apr 2006 22:05:33 -0400 (EDT) George P Nychis wrote:
> 
>> 
>>> On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:
>>> 
>>>> Thanks for the help.
>>>> 
>>>> Here is the makefile: http://rafb.net/paste/results/auchPH75.html
>>>> 
>>>> And here is the full errors I receive: 
>>>> http://rafb.net/paste/results/Qplpqw74.html
>>>> 
>>>> Greatly appreciate it
>>>> 
>>>> - George
>>> 
>>> [repeat: please don't top-post]
>>> 
>>> I don't know how much I can help you.  It's been a long time since
>>> I've built external modules on 2.4.x.
>>> 
>>> Problems that I see: - the Makefile does not use the expected 2.4
>>> kernel build infrastructure; - kernel Makefile uses -nostdinc to
>>> prevent use of userspace headers; - Makefile is trying to include
>>> userspace headers instead of kernel headers, e.g.: In file included
>>> from /usr/include/linux/if_ether.h:107, from
>>> /usr/include/linux/netdevice.h:29, from sch_xcp.c:8: - this specified
>>> include directory is only in 2.6.x, not 2.4.x: -I/lib/modules/`uname
>>> -r`/build/include/asm/mach-default
>>> 
>>> It's not clear to me how this makefile could work with 2.4.x at all.
>>> Is it supposed to, or that's just what you want to see it do?
>>> 
>>> You could try to fix the Makefile based on makefile-changes articles
>>> at lwn.net. E.g.: http://lwn.net/Articles/151784/ 
>>> http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/ 
>>> http://lwn.net/Articles/69148/ http://lwn.net/Articles/21823/
>>> 
>>> 
>>> 
>>>>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis wrote:
>>>>> 
>>>>>> Yeah, this module is unfortunately not under the GPL, it was
>>>>>> made for research and i am not the author, I was only given the
>>>>>> code for my own research.
>>>>>> 
>>>>>> I enabled that support in the kernel, and then tried to
>>>>>> recompile and get tons of errors/warnings... so maybe I am
>>>>>> missing something else to be enabled in the kernel... here are a
>>>>>> few examples of errors: /usr/include/linux/skbuff.h:30:26:
>>>>>> net/checksum.h: No such file or directory
>>>>>> /usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or
>>>>>> directory /usr/include/linux/irq.h:72: error: `NR_IRQS' 
>>>>>> undeclared here (not in a function)
>>>>>> /usr/include/asm/hw_irq.h:28: error: `NR_IRQ_VECTORS' undeclared
>>>>>> here (not in a function)
>>>>>> 
>>>>>> I think those are the top most errors, so if i can fix those 
>>>>>> hopefully the rest shall vanish!
>>>>> 
>>>>> Looks like a Makefile problem then.  Can you post the Makefile? 
>>>>> Hopefully it is using a Makefile and not just an elaborate gcc
>>>>> command line.
>>>>> 
>>>>> [and please don't top-post]
>>>>> 
>>>>>> - George
>>>>>> 
>>>>>> 
>>>>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr
>>>>>>> 2006 18:47:34 -0400 (EDT)
>>>>>>> 
>>>>>>>> Hey,
>>>>>>>> 
>>>>>>>> I have a kernel module that uses unregister_qdisc and 
>>>>>>>> register_qdisc, whenever i try to insert the module I get: 
>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved 
>>>>>>>> symbol unregister_qdisc 
>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved 
>>>>>>>> symbol register_qdisc
>>>>>>>> 
>>>>>>>> Am i missing some sort of support in the kernel?
>>>>>>> 
>>>>>>> Make sure CONFIG_NET_SCHED is enabled and that you compiled
>>>>>>> your module against that kernel.
>>>>>>> 
>>>>>>> Where does this sch_xcp come from?  It's not in the vanilla 
>>>>>>> sources.
>>>>>>> 
>>>>>>> Also, please direct networking questions to the 
>>>>>>> netdev@vger.kernel.org mailing list which I have added to the
>>>>>>>  CC:.
>>> 
>>> --- ~Randy
>>> 
>>> 
>> 
>> By the way, if I add -I/usr/src/linux/include to the compile line, it
>> successfully compiles, however, i am back to the start: lanthanum-ini
>> src-1.0.1 # insmod sch_xcp Using
>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o 
>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
>> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
>> register_qdisc
> 
> Yet your 2.4.32 kernel image file does have those symbols in it? Can you
> verify that by using 'nm' on the kernel image file?
> 
> If so, then I suppose that you'll need to make a small module test case 
> that exhibits this behavior, or just tell us where to get the sch_xcp
> files...
> 
> (re-added cc: for netdev)
> 
> --- ~Randy
> 
> 

By kernel image, do you mean /usr/src/linux/vmlinux ?
if so,
lanthanum-ini linux # nm vmlinux | grep register_qdisc
c0399200 R __kstrtab_register_qdisc
c0399240 R __kstrtab_unregister_qdisc
c039ebc8 R __ksymtab_register_qdisc
c039ebd0 R __ksymtab_unregister_qdisc
c02eda40 T register_qdisc
c02edaf0 T unregister_qdisc

Re: 2.4.32: unresolved symbol unregister_qdisc

[Randy.Dunlap]

On Sun, 9 Apr 2006 22:49:50 -0400 (EDT) George P Nychis wrote:

> 
> > On Sun, 9 Apr 2006 22:05:33 -0400 (EDT) George P Nychis wrote:
> > 
> >> 
> >>> On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:
> >>> 
> >>>> Thanks for the help.
> >>>> 
> >>>> Here is the makefile: http://rafb.net/paste/results/auchPH75.html
> >>>> 
> >>>> And here is the full errors I receive: 
> >>>> http://rafb.net/paste/results/Qplpqw74.html
> >>>> 
> >>>> Greatly appreciate it
> >>>> 
> >>>> - George
> >>> 
> >>> [repeat: please don't top-post]
> >>> 
> >>> I don't know how much I can help you.  It's been a long time since
> >>> I've built external modules on 2.4.x.
> >>> 
> >>> Problems that I see: - the Makefile does not use the expected 2.4
> >>> kernel build infrastructure; - kernel Makefile uses -nostdinc to
> >>> prevent use of userspace headers; - Makefile is trying to include
> >>> userspace headers instead of kernel headers, e.g.: In file included
> >>> from /usr/include/linux/if_ether.h:107, from
> >>> /usr/include/linux/netdevice.h:29, from sch_xcp.c:8: - this specified
> >>> include directory is only in 2.6.x, not 2.4.x: -I/lib/modules/`uname
> >>> -r`/build/include/asm/mach-default
> >>> 
> >>> It's not clear to me how this makefile could work with 2.4.x at all.
> >>> Is it supposed to, or that's just what you want to see it do?
> >>> 
> >>> You could try to fix the Makefile based on makefile-changes articles
> >>> at lwn.net. E.g.: http://lwn.net/Articles/151784/ 
> >>> http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/ 
> >>> http://lwn.net/Articles/69148/ http://lwn.net/Articles/21823/
> >>> 
> >>> 
> >>> 
> >>>>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis wrote:
> >>>>> 
> >>>>>> Yeah, this module is unfortunately not under the GPL, it was
> >>>>>> made for research and i am not the author, I was only given the
> >>>>>> code for my own research.
> >>>>>> 
> >>>>>> I enabled that support in the kernel, and then tried to
> >>>>>> recompile and get tons of errors/warnings... so maybe I am
> >>>>>> missing something else to be enabled in the kernel... here are a
> >>>>>> few examples of errors: /usr/include/linux/skbuff.h:30:26:
> >>>>>> net/checksum.h: No such file or directory
> >>>>>> /usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or
> >>>>>> directory /usr/include/linux/irq.h:72: error: `NR_IRQS' 
> >>>>>> undeclared here (not in a function)
> >>>>>> /usr/include/asm/hw_irq.h:28: error: `NR_IRQ_VECTORS' undeclared
> >>>>>> here (not in a function)
> >>>>>> 
> >>>>>> I think those are the top most errors, so if i can fix those 
> >>>>>> hopefully the rest shall vanish!
> >>>>> 
> >>>>> Looks like a Makefile problem then.  Can you post the Makefile? 
> >>>>> Hopefully it is using a Makefile and not just an elaborate gcc
> >>>>> command line.
> >>>>> 
> >>>>> [and please don't top-post]
> >>>>> 
> >>>>>> - George
> >>>>>> 
> >>>>>> 
> >>>>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8 Apr
> >>>>>>> 2006 18:47:34 -0400 (EDT)
> >>>>>>> 
> >>>>>>>> Hey,
> >>>>>>>> 
> >>>>>>>> I have a kernel module that uses unregister_qdisc and 
> >>>>>>>> register_qdisc, whenever i try to insert the module I get: 
> >>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved 
> >>>>>>>> symbol unregister_qdisc 
> >>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved 
> >>>>>>>> symbol register_qdisc
> >>>>>>>> 
> >>>>>>>> Am i missing some sort of support in the kernel?
> >>>>>>> 
> >>>>>>> Make sure CONFIG_NET_SCHED is enabled and that you compiled
> >>>>>>> your module against that kernel.
> >>>>>>> 
> >>>>>>> Where does this sch_xcp come from?  It's not in the vanilla 
> >>>>>>> sources.
> >>>>>>> 
> >>>>>>> Also, please direct networking questions to the 
> >>>>>>> netdev@vger.kernel.org mailing list which I have added to the
> >>>>>>>  CC:.
> >>> 
> >>> --- ~Randy
> >>> 
> >>> 
> >> 
> >> By the way, if I add -I/usr/src/linux/include to the compile line, it
> >> successfully compiles, however, i am back to the start: lanthanum-ini
> >> src-1.0.1 # insmod sch_xcp Using
> >> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o 
> >> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> >> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
> >> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> >> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol
> >> register_qdisc
> > 
> > Yet your 2.4.32 kernel image file does have those symbols in it? Can you
> > verify that by using 'nm' on the kernel image file?
> > 
> > If so, then I suppose that you'll need to make a small module test case 
> > that exhibits this behavior, or just tell us where to get the sch_xcp
> > files...
> > 
> > (re-added cc: for netdev)
> > 
> > --- ~Randy
> > 
> > 
> 
> By kernel image, do you mean /usr/src/linux/vmlinux ?
> if so,
> lanthanum-ini linux # nm vmlinux | grep register_qdisc
> c0399200 R __kstrtab_register_qdisc
> c0399240 R __kstrtab_unregister_qdisc
> c039ebc8 R __ksymtab_register_qdisc
> c039ebd0 R __ksymtab_unregister_qdisc
> c02eda40 T register_qdisc
> c02edaf0 T unregister_qdisc

Yes.  That's good, then.

---
~Randy

Re: 2.4.32: unresolved symbol unregister_qdisc

[George P Nychis]

> On Sun, 9 Apr 2006 22:49:50 -0400 (EDT) George P Nychis wrote:
> 
>> 
>>> On Sun, 9 Apr 2006 22:05:33 -0400 (EDT) George P Nychis wrote:
>>> 
>>>> 
>>>>> On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:
>>>>> 
>>>>>> Thanks for the help.
>>>>>> 
>>>>>> Here is the makefile:
>>>>>> http://rafb.net/paste/results/auchPH75.html
>>>>>> 
>>>>>> And here is the full errors I receive: 
>>>>>> http://rafb.net/paste/results/Qplpqw74.html
>>>>>> 
>>>>>> Greatly appreciate it
>>>>>> 
>>>>>> - George
>>>>> 
>>>>> [repeat: please don't top-post]
>>>>> 
>>>>> I don't know how much I can help you.  It's been a long time
>>>>> since I've built external modules on 2.4.x.
>>>>> 
>>>>> Problems that I see: - the Makefile does not use the expected 2.4
>>>>>  kernel build infrastructure; - kernel Makefile uses -nostdinc to
>>>>>  prevent use of userspace headers; - Makefile is trying to
>>>>> include userspace headers instead of kernel headers, e.g.: In file
>>>>> included from /usr/include/linux/if_ether.h:107, from 
>>>>> /usr/include/linux/netdevice.h:29, from sch_xcp.c:8: - this
>>>>> specified include directory is only in 2.6.x, not 2.4.x:
>>>>> -I/lib/modules/`uname -r`/build/include/asm/mach-default
>>>>> 
>>>>> It's not clear to me how this makefile could work with 2.4.x at
>>>>> all. Is it supposed to, or that's just what you want to see it do?
>>>>> 
>>>>> 
>>>>> You could try to fix the Makefile based on makefile-changes
>>>>> articles at lwn.net. E.g.: http://lwn.net/Articles/151784/ 
>>>>> http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/ 
>>>>> http://lwn.net/Articles/69148/ http://lwn.net/Articles/21823/
>>>>> 
>>>>> 
>>>>> 
>>>>>>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis
>>>>>>> wrote:
>>>>>>> 
>>>>>>>> Yeah, this module is unfortunately not under the GPL, it
>>>>>>>> was made for research and i am not the author, I was only
>>>>>>>> given the code for my own research.
>>>>>>>> 
>>>>>>>> I enabled that support in the kernel, and then tried to 
>>>>>>>> recompile and get tons of errors/warnings... so maybe I am 
>>>>>>>> missing something else to be enabled in the kernel... here
>>>>>>>> are a few examples of errors:
>>>>>>>> /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such
>>>>>>>> file or directory /usr/include/asm/irq.h:16:25:
>>>>>>>> irq_vectors.h: No such file or directory
>>>>>>>> /usr/include/linux/irq.h:72: error: `NR_IRQS' undeclared
>>>>>>>> here (not in a function) /usr/include/asm/hw_irq.h:28:
>>>>>>>> error: `NR_IRQ_VECTORS' undeclared here (not in a function)
>>>>>>>> 
>>>>>>>> I think those are the top most errors, so if i can fix
>>>>>>>> those hopefully the rest shall vanish!
>>>>>>> 
>>>>>>> Looks like a Makefile problem then.  Can you post the
>>>>>>> Makefile? Hopefully it is using a Makefile and not just an
>>>>>>> elaborate gcc command line.
>>>>>>> 
>>>>>>> [and please don't top-post]
>>>>>>> 
>>>>>>>> - George
>>>>>>>> 
>>>>>>>> 
>>>>>>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8
>>>>>>>>> Apr 2006 18:47:34 -0400 (EDT)
>>>>>>>>> 
>>>>>>>>>> Hey,
>>>>>>>>>> 
>>>>>>>>>> I have a kernel module that uses unregister_qdisc and 
>>>>>>>>>> register_qdisc, whenever i try to insert the module I
>>>>>>>>>> get: /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
>>>>>>>>>> unresolved symbol unregister_qdisc 
>>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
>>>>>>>>>> unresolved symbol register_qdisc
>>>>>>>>>> 
>>>>>>>>>> Am i missing some sort of support in the kernel?
>>>>>>>>> 
>>>>>>>>> Make sure CONFIG_NET_SCHED is enabled and that you
>>>>>>>>> compiled your module against that kernel.
>>>>>>>>> 
>>>>>>>>> Where does this sch_xcp come from?  It's not in the
>>>>>>>>> vanilla sources.
>>>>>>>>> 
>>>>>>>>> Also, please direct networking questions to the 
>>>>>>>>> netdev@vger.kernel.org mailing list which I have added to
>>>>>>>>> the CC:.
>>>>> 
>>>>> --- ~Randy
>>>>> 
>>>>> 
>>>> 
>>>> By the way, if I add -I/usr/src/linux/include to the compile line,
>>>> it successfully compiles, however, i am back to the start:
>>>> lanthanum-ini src-1.0.1 # insmod sch_xcp Using 
>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o 
>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
>>>> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
>>>> register_qdisc
>>> 
>>> Yet your 2.4.32 kernel image file does have those symbols in it? Can
>>> you verify that by using 'nm' on the kernel image file?
>>> 
>>> If so, then I suppose that you'll need to make a small module test
>>> case that exhibits this behavior, or just tell us where to get the
>>> sch_xcp files...
>>> 
>>> (re-added cc: for netdev)
>>> 
>>> --- ~Randy
>>> 
>>> 
>> 
>> By kernel image, do you mean /usr/src/linux/vmlinux ? if so, 
>> lanthanum-ini linux # nm vmlinux | grep register_qdisc c0399200 R
>> __kstrtab_register_qdisc c0399240 R __kstrtab_unregister_qdisc c039ebc8 R
>> __ksymtab_register_qdisc c039ebd0 R __ksymtab_unregister_qdisc c02eda40 T
>> register_qdisc c02edaf0 T unregister_qdisc
> 
> Yes.  That's good, then.
> 
> --- ~Randy
> 
> 

*sigh* ... still getting the unresolved symbols, i totally don't get it, my /usr/src/linux/vmlinux says that the symbols exist, i install the kernel, reboot, and still get the same errors

Any other way of doing this or reason i can find out whats causing this?

thanks for your help

Re: 2.4.32: unresolved symbol unregister_qdisc

[Randy.Dunlap]

On Sun, 9 Apr 2006 23:20:01 -0400 (EDT) George P Nychis wrote:

> 
> > On Sun, 9 Apr 2006 22:49:50 -0400 (EDT) George P Nychis wrote:
> > 
> >> 
> >>> On Sun, 9 Apr 2006 22:05:33 -0400 (EDT) George P Nychis wrote:
> >>> 
> >>>> 
> >>>>> On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:
> >>>>> 
> >>>>>> Thanks for the help.
> >>>>>> 
> >>>>>> Here is the makefile:
> >>>>>> http://rafb.net/paste/results/auchPH75.html
> >>>>>> 
> >>>>>> And here is the full errors I receive: 
> >>>>>> http://rafb.net/paste/results/Qplpqw74.html
> >>>>>> 
> >>>>>> Greatly appreciate it
> >>>>>> 
> >>>>>> - George
> >>>>> 
> >>>>> [repeat: please don't top-post]
> >>>>> 
> >>>>> I don't know how much I can help you.  It's been a long time
> >>>>> since I've built external modules on 2.4.x.
> >>>>> 
> >>>>> Problems that I see: - the Makefile does not use the expected 2.4
> >>>>>  kernel build infrastructure; - kernel Makefile uses -nostdinc to
> >>>>>  prevent use of userspace headers; - Makefile is trying to
> >>>>> include userspace headers instead of kernel headers, e.g.: In file
> >>>>> included from /usr/include/linux/if_ether.h:107, from 
> >>>>> /usr/include/linux/netdevice.h:29, from sch_xcp.c:8: - this
> >>>>> specified include directory is only in 2.6.x, not 2.4.x:
> >>>>> -I/lib/modules/`uname -r`/build/include/asm/mach-default
> >>>>> 
> >>>>> It's not clear to me how this makefile could work with 2.4.x at
> >>>>> all. Is it supposed to, or that's just what you want to see it do?
> >>>>> 
> >>>>> 
> >>>>> You could try to fix the Makefile based on makefile-changes
> >>>>> articles at lwn.net. E.g.: http://lwn.net/Articles/151784/ 
> >>>>> http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/ 
> >>>>> http://lwn.net/Articles/69148/ http://lwn.net/Articles/21823/
> >>>>> 
> >>>>> 
> >>>>> 
> >>>>>>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis
> >>>>>>> wrote:
> >>>>>>> 
> >>>>>>>> Yeah, this module is unfortunately not under the GPL, it
> >>>>>>>> was made for research and i am not the author, I was only
> >>>>>>>> given the code for my own research.
> >>>>>>>> 
> >>>>>>>> I enabled that support in the kernel, and then tried to 
> >>>>>>>> recompile and get tons of errors/warnings... so maybe I am 
> >>>>>>>> missing something else to be enabled in the kernel... here
> >>>>>>>> are a few examples of errors:
> >>>>>>>> /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such
> >>>>>>>> file or directory /usr/include/asm/irq.h:16:25:
> >>>>>>>> irq_vectors.h: No such file or directory
> >>>>>>>> /usr/include/linux/irq.h:72: error: `NR_IRQS' undeclared
> >>>>>>>> here (not in a function) /usr/include/asm/hw_irq.h:28:
> >>>>>>>> error: `NR_IRQ_VECTORS' undeclared here (not in a function)
> >>>>>>>> 
> >>>>>>>> I think those are the top most errors, so if i can fix
> >>>>>>>> those hopefully the rest shall vanish!
> >>>>>>> 
> >>>>>>> Looks like a Makefile problem then.  Can you post the
> >>>>>>> Makefile? Hopefully it is using a Makefile and not just an
> >>>>>>> elaborate gcc command line.
> >>>>>>> 
> >>>>>>> [and please don't top-post]
> >>>>>>> 
> >>>>>>>> - George
> >>>>>>>> 
> >>>>>>>> 
> >>>>>>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8
> >>>>>>>>> Apr 2006 18:47:34 -0400 (EDT)
> >>>>>>>>> 
> >>>>>>>>>> Hey,
> >>>>>>>>>> 
> >>>>>>>>>> I have a kernel module that uses unregister_qdisc and 
> >>>>>>>>>> register_qdisc, whenever i try to insert the module I
> >>>>>>>>>> get: /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> >>>>>>>>>> unresolved symbol unregister_qdisc 
> >>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> >>>>>>>>>> unresolved symbol register_qdisc
> >>>>>>>>>> 
> >>>>>>>>>> Am i missing some sort of support in the kernel?
> >>>>>>>>> 
> >>>>>>>>> Make sure CONFIG_NET_SCHED is enabled and that you
> >>>>>>>>> compiled your module against that kernel.
> >>>>>>>>> 
> >>>>>>>>> Where does this sch_xcp come from?  It's not in the
> >>>>>>>>> vanilla sources.
> >>>>>>>>> 
> >>>>>>>>> Also, please direct networking questions to the 
> >>>>>>>>> netdev@vger.kernel.org mailing list which I have added to
> >>>>>>>>> the CC:.
> >>>>> 
> >>>>> --- ~Randy
> >>>>> 
> >>>>> 
> >>>> 
> >>>> By the way, if I add -I/usr/src/linux/include to the compile line,
> >>>> it successfully compiles, however, i am back to the start:
> >>>> lanthanum-ini src-1.0.1 # insmod sch_xcp Using 
> >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o 
> >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
> >>>> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
> >>>> register_qdisc
> >>> 
> >>> Yet your 2.4.32 kernel image file does have those symbols in it? Can
> >>> you verify that by using 'nm' on the kernel image file?
> >>> 
> >>> If so, then I suppose that you'll need to make a small module test
> >>> case that exhibits this behavior, or just tell us where to get the
> >>> sch_xcp files...
> >>> 
> >>> (re-added cc: for netdev)
> >>> 
> >>> --- ~Randy
> >>> 
> >>> 
> >> 
> >> By kernel image, do you mean /usr/src/linux/vmlinux ? if so, 
> >> lanthanum-ini linux # nm vmlinux | grep register_qdisc c0399200 R
> >> __kstrtab_register_qdisc c0399240 R __kstrtab_unregister_qdisc c039ebc8 R
> >> __ksymtab_register_qdisc c039ebd0 R __ksymtab_unregister_qdisc c02eda40 T
> >> register_qdisc c02edaf0 T unregister_qdisc
> > 
> > Yes.  That's good, then.
> > 
> > --- ~Randy
> > 
> > 
> 
> *sigh* ... still getting the unresolved symbols, i totally don't get it, my /usr/src/linux/vmlinux says that the symbols exist, i install the kernel, reboot, and still get the same errors

Yes, I understood that.

> Any other way of doing this or reason i can find out whats causing this?

Well, one of the makefile gods can step in and spot the problem, or you can
create a test case so that others can try to help out with it.  Or tell us
where to get the code that you are using.

> thanks for your help

---
~Randy

Re: 2.4.32: unresolved symbol unregister_qdisc

[Willy Tarreau]

On Sun, Apr 09, 2006 at 08:29:12PM -0700, Randy.Dunlap wrote:
> On Sun, 9 Apr 2006 23:20:01 -0400 (EDT) George P Nychis wrote:
> 
> > 
> > > On Sun, 9 Apr 2006 22:49:50 -0400 (EDT) George P Nychis wrote:
> > > 
> > >> 
> > >>> On Sun, 9 Apr 2006 22:05:33 -0400 (EDT) George P Nychis wrote:
> > >>> 
> > >>>> 
> > >>>>> On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis wrote:
> > >>>>> 
> > >>>>>> Thanks for the help.
> > >>>>>> 
> > >>>>>> Here is the makefile:
> > >>>>>> http://rafb.net/paste/results/auchPH75.html
> > >>>>>> 
> > >>>>>> And here is the full errors I receive: 
> > >>>>>> http://rafb.net/paste/results/Qplpqw74.html
> > >>>>>> 
> > >>>>>> Greatly appreciate it
> > >>>>>> 
> > >>>>>> - George
> > >>>>> 
> > >>>>> [repeat: please don't top-post]
> > >>>>> 
> > >>>>> I don't know how much I can help you.  It's been a long time
> > >>>>> since I've built external modules on 2.4.x.
> > >>>>> 
> > >>>>> Problems that I see: - the Makefile does not use the expected 2.4
> > >>>>>  kernel build infrastructure; - kernel Makefile uses -nostdinc to
> > >>>>>  prevent use of userspace headers; - Makefile is trying to
> > >>>>> include userspace headers instead of kernel headers, e.g.: In file
> > >>>>> included from /usr/include/linux/if_ether.h:107, from 
> > >>>>> /usr/include/linux/netdevice.h:29, from sch_xcp.c:8: - this
> > >>>>> specified include directory is only in 2.6.x, not 2.4.x:
> > >>>>> -I/lib/modules/`uname -r`/build/include/asm/mach-default
> > >>>>> 
> > >>>>> It's not clear to me how this makefile could work with 2.4.x at
> > >>>>> all. Is it supposed to, or that's just what you want to see it do?
> > >>>>> 
> > >>>>> 
> > >>>>> You could try to fix the Makefile based on makefile-changes
> > >>>>> articles at lwn.net. E.g.: http://lwn.net/Articles/151784/ 
> > >>>>> http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/ 
> > >>>>> http://lwn.net/Articles/69148/ http://lwn.net/Articles/21823/
> > >>>>> 
> > >>>>> 
> > >>>>> 
> > >>>>>>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis
> > >>>>>>> wrote:
> > >>>>>>> 
> > >>>>>>>> Yeah, this module is unfortunately not under the GPL, it
> > >>>>>>>> was made for research and i am not the author, I was only
> > >>>>>>>> given the code for my own research.
> > >>>>>>>> 
> > >>>>>>>> I enabled that support in the kernel, and then tried to 
> > >>>>>>>> recompile and get tons of errors/warnings... so maybe I am 
> > >>>>>>>> missing something else to be enabled in the kernel... here
> > >>>>>>>> are a few examples of errors:
> > >>>>>>>> /usr/include/linux/skbuff.h:30:26: net/checksum.h: No such
> > >>>>>>>> file or directory /usr/include/asm/irq.h:16:25:
> > >>>>>>>> irq_vectors.h: No such file or directory
> > >>>>>>>> /usr/include/linux/irq.h:72: error: `NR_IRQS' undeclared
> > >>>>>>>> here (not in a function) /usr/include/asm/hw_irq.h:28:
> > >>>>>>>> error: `NR_IRQ_VECTORS' undeclared here (not in a function)
> > >>>>>>>> 
> > >>>>>>>> I think those are the top most errors, so if i can fix
> > >>>>>>>> those hopefully the rest shall vanish!
> > >>>>>>> 
> > >>>>>>> Looks like a Makefile problem then.  Can you post the
> > >>>>>>> Makefile? Hopefully it is using a Makefile and not just an
> > >>>>>>> elaborate gcc command line.
> > >>>>>>> 
> > >>>>>>> [and please don't top-post]
> > >>>>>>> 
> > >>>>>>>> - George
> > >>>>>>>> 
> > >>>>>>>> 
> > >>>>>>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat, 8
> > >>>>>>>>> Apr 2006 18:47:34 -0400 (EDT)
> > >>>>>>>>> 
> > >>>>>>>>>> Hey,
> > >>>>>>>>>> 
> > >>>>>>>>>> I have a kernel module that uses unregister_qdisc and 
> > >>>>>>>>>> register_qdisc, whenever i try to insert the module I
> > >>>>>>>>>> get: /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> > >>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> > >>>>>>>>>> unresolved symbol unregister_qdisc 
> > >>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> > >>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o:
> > >>>>>>>>>> unresolved symbol register_qdisc
> > >>>>>>>>>> 
> > >>>>>>>>>> Am i missing some sort of support in the kernel?
> > >>>>>>>>> 
> > >>>>>>>>> Make sure CONFIG_NET_SCHED is enabled and that you
> > >>>>>>>>> compiled your module against that kernel.
> > >>>>>>>>> 
> > >>>>>>>>> Where does this sch_xcp come from?  It's not in the
> > >>>>>>>>> vanilla sources.
> > >>>>>>>>> 
> > >>>>>>>>> Also, please direct networking questions to the 
> > >>>>>>>>> netdev@vger.kernel.org mailing list which I have added to
> > >>>>>>>>> the CC:.
> > >>>>> 
> > >>>>> --- ~Randy
> > >>>>> 
> > >>>>> 
> > >>>> 
> > >>>> By the way, if I add -I/usr/src/linux/include to the compile line,
> > >>>> it successfully compiles, however, i am back to the start:
> > >>>> lanthanum-ini src-1.0.1 # insmod sch_xcp Using 
> > >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o 
> > >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> > >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
> > >>>> unregister_qdisc /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
> > >>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved symbol 
> > >>>> register_qdisc
> > >>> 
> > >>> Yet your 2.4.32 kernel image file does have those symbols in it? Can
> > >>> you verify that by using 'nm' on the kernel image file?
> > >>> 
> > >>> If so, then I suppose that you'll need to make a small module test
> > >>> case that exhibits this behavior, or just tell us where to get the
> > >>> sch_xcp files...
> > >>> 
> > >>> (re-added cc: for netdev)
> > >>> 
> > >>> --- ~Randy
> > >>> 
> > >>> 
> > >> 
> > >> By kernel image, do you mean /usr/src/linux/vmlinux ? if so, 
> > >> lanthanum-ini linux # nm vmlinux | grep register_qdisc c0399200 R
> > >> __kstrtab_register_qdisc c0399240 R __kstrtab_unregister_qdisc c039ebc8 R
> > >> __ksymtab_register_qdisc c039ebd0 R __ksymtab_unregister_qdisc c02eda40 T
> > >> register_qdisc c02edaf0 T unregister_qdisc
> > > 
> > > Yes.  That's good, then.
> > > 
> > > --- ~Randy
> > > 
> > > 
> > 
> > *sigh* ... still getting the unresolved symbols, i totally don't get it, my /usr/src/linux/vmlinux says that the symbols exist, i install the kernel, reboot, and still get the same errors
> 
> Yes, I understood that.

There is also the possibility that you're running another kernel. Please
check /proc/ksyms to be sure that register_qdisc is there.

> > Any other way of doing this or reason i can find out whats causing this?
> 
> Well, one of the makefile gods can step in and spot the problem, or you can
> create a test case so that others can try to help out with it.  Or tell us
> where to get the code that you are using.

That would clearly help. If you cannot post the whole driver, please at
least post the source without any function except init_module(). Check
net/sched/sch_ingress.c for very minimal code.
 
> > thanks for your help
>
> ---
> ~Randy

Willy

Re: 2.4.32: unresolved symbol unregister_qdisc

[George P Nychis]

> On Sun, 9 Apr 2006 23:20:01 -0400 (EDT) George P Nychis wrote:
> 
>> 
>>> On Sun, 9 Apr 2006 22:49:50 -0400 (EDT) George P Nychis wrote:
>>> 
>>>> 
>>>>> On Sun, 9 Apr 2006 22:05:33 -0400 (EDT) George P Nychis wrote:
>>>>> 
>>>>>> 
>>>>>>> On Sun, 9 Apr 2006 13:37:25 -0400 (EDT) George P Nychis
>>>>>>> wrote:
>>>>>>> 
>>>>>>>> Thanks for the help.
>>>>>>>> 
>>>>>>>> Here is the makefile: 
>>>>>>>> http://rafb.net/paste/results/auchPH75.html
>>>>>>>> 
>>>>>>>> And here is the full errors I receive: 
>>>>>>>> http://rafb.net/paste/results/Qplpqw74.html
>>>>>>>> 
>>>>>>>> Greatly appreciate it
>>>>>>>> 
>>>>>>>> - George
>>>>>>> 
>>>>>>> [repeat: please don't top-post]
>>>>>>> 
>>>>>>> I don't know how much I can help you.  It's been a long time 
>>>>>>> since I've built external modules on 2.4.x.
>>>>>>> 
>>>>>>> Problems that I see: - the Makefile does not use the expected
>>>>>>> 2.4 kernel build infrastructure; - kernel Makefile uses
>>>>>>> -nostdinc to prevent use of userspace headers; - Makefile is
>>>>>>> trying to include userspace headers instead of kernel headers,
>>>>>>> e.g.: In file included from /usr/include/linux/if_ether.h:107,
>>>>>>> from /usr/include/linux/netdevice.h:29, from sch_xcp.c:8: -
>>>>>>> this specified include directory is only in 2.6.x, not 2.4.x: 
>>>>>>> -I/lib/modules/`uname -r`/build/include/asm/mach-default
>>>>>>> 
>>>>>>> It's not clear to me how this makefile could work with 2.4.x
>>>>>>> at all. Is it supposed to, or that's just what you want to see
>>>>>>> it do?
>>>>>>> 
>>>>>>> 
>>>>>>> You could try to fix the Makefile based on makefile-changes 
>>>>>>> articles at lwn.net. E.g.: http://lwn.net/Articles/151784/ 
>>>>>>> http://lwn.net/Articles/79984/ http://lwn.net/Articles/74767/
>>>>>>>  http://lwn.net/Articles/69148/
>>>>>>> http://lwn.net/Articles/21823/
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>>>> On Sat, 8 Apr 2006 19:18:47 -0400 (EDT) George P Nychis 
>>>>>>>>> wrote:
>>>>>>>>> 
>>>>>>>>>> Yeah, this module is unfortunately not under the GPL,
>>>>>>>>>> it was made for research and i am not the author, I was
>>>>>>>>>> only given the code for my own research.
>>>>>>>>>> 
>>>>>>>>>> I enabled that support in the kernel, and then tried to
>>>>>>>>>>  recompile and get tons of errors/warnings... so maybe
>>>>>>>>>> I am missing something else to be enabled in the
>>>>>>>>>> kernel... here are a few examples of errors: 
>>>>>>>>>> /usr/include/linux/skbuff.h:30:26: net/checksum.h: No
>>>>>>>>>> such file or directory /usr/include/asm/irq.h:16:25: 
>>>>>>>>>> irq_vectors.h: No such file or directory 
>>>>>>>>>> /usr/include/linux/irq.h:72: error: `NR_IRQS'
>>>>>>>>>> undeclared here (not in a function)
>>>>>>>>>> /usr/include/asm/hw_irq.h:28: error: `NR_IRQ_VECTORS'
>>>>>>>>>> undeclared here (not in a function)
>>>>>>>>>> 
>>>>>>>>>> I think those are the top most errors, so if i can fix 
>>>>>>>>>> those hopefully the rest shall vanish!
>>>>>>>>> 
>>>>>>>>> Looks like a Makefile problem then.  Can you post the 
>>>>>>>>> Makefile? Hopefully it is using a Makefile and not just
>>>>>>>>> an elaborate gcc command line.
>>>>>>>>> 
>>>>>>>>> [and please don't top-post]
>>>>>>>>> 
>>>>>>>>>> - George
>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>>>> From: "George P Nychis" <gnychis@cmu.edu> Date: Sat,
>>>>>>>>>>> 8 Apr 2006 18:47:34 -0400 (EDT)
>>>>>>>>>>> 
>>>>>>>>>>>> Hey,
>>>>>>>>>>>> 
>>>>>>>>>>>> I have a kernel module that uses unregister_qdisc
>>>>>>>>>>>> and register_qdisc, whenever i try to insert the
>>>>>>>>>>>> module I get:
>>>>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>>>>>> unresolved symbol unregister_qdisc 
>>>>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>>>>>>>> unresolved symbol register_qdisc
>>>>>>>>>>>> 
>>>>>>>>>>>> Am i missing some sort of support in the kernel?
>>>>>>>>>>> 
>>>>>>>>>>> Make sure CONFIG_NET_SCHED is enabled and that you 
>>>>>>>>>>> compiled your module against that kernel.
>>>>>>>>>>> 
>>>>>>>>>>> Where does this sch_xcp come from?  It's not in the 
>>>>>>>>>>> vanilla sources.
>>>>>>>>>>> 
>>>>>>>>>>> Also, please direct networking questions to the 
>>>>>>>>>>> netdev@vger.kernel.org mailing list which I have
>>>>>>>>>>> added to the CC:.
>>>>>>> 
>>>>>>> --- ~Randy
>>>>>>> 
>>>>>>> 
>>>>>> 
>>>>>> By the way, if I add -I/usr/src/linux/include to the compile
>>>>>> line, it successfully compiles, however, i am back to the start:
>>>>>>  lanthanum-ini src-1.0.1 # insmod sch_xcp Using 
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o 
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved
>>>>>> symbol unregister_qdisc
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: 
>>>>>> /lib/modules/2.4.32/kernel/net/sched/sch_xcp.o: unresolved
>>>>>> symbol register_qdisc
>>>>> 
>>>>> Yet your 2.4.32 kernel image file does have those symbols in it?
>>>>> Can you verify that by using 'nm' on the kernel image file?
>>>>> 
>>>>> If so, then I suppose that you'll need to make a small module
>>>>> test case that exhibits this behavior, or just tell us where to
>>>>> get the sch_xcp files...
>>>>> 
>>>>> (re-added cc: for netdev)
>>>>> 
>>>>> --- ~Randy
>>>>> 
>>>>> 
>>>> 
>>>> By kernel image, do you mean /usr/src/linux/vmlinux ? if so, 
>>>> lanthanum-ini linux # nm vmlinux | grep register_qdisc c0399200 R 
>>>> __kstrtab_register_qdisc c0399240 R __kstrtab_unregister_qdisc
>>>> c039ebc8 R __ksymtab_register_qdisc c039ebd0 R
>>>> __ksymtab_unregister_qdisc c02eda40 T register_qdisc c02edaf0 T
>>>> unregister_qdisc
>>> 
>>> Yes.  That's good, then.
>>> 
>>> --- ~Randy
>>> 
>>> 
>> 
>> *sigh* ... still getting the unresolved symbols, i totally don't get
>> it, my /usr/src/linux/vmlinux says that the symbols exist, i install
>> the kernel, reboot, and still get the same errors
> 
> Yes, I understood that.
> 
>> Any other way of doing this or reason i can find out whats causing
>> this?
> 
> Well, one of the makefile gods can step in and spot the problem, or you
> can create a test case so that others can try to help out with it.  Or
> tell us where to get the code that you are using.
> 
>> thanks for your help
> 
> --- ~Randy
> 
> 


Got it working!

Ian's suggestion worked.... i had to make clean, make mrproper, and completely build from scratch

Bahhh 2.4

Thanks for your help Randy also, and all others who responded