CentOS virt - Nov 2009 - What kernel source and how to download it

Hi all,
I am running CentOS 5.3 under xen on a VPS machine (so I have a limited control
on the machine)
I am playing with openswan and KLIPS and I need to build the ipsec.ko kernel
module.
I would need to download kernel source but I am really confused about what
source I have to get.

uname -r tells:
2.6.18-128.7.1.el5xen

ls /lib/modules tells:
ls /lib/modules        
2.6.18-128.7.1.el5xen  2.6.18-164.2.1.el5  2.6.18-164.6.1.el5 
2.6.18-53.1.13.el5xen

I have no sources in /usr/src/kernels

Is there a source code named "2.6.18-128.7.1.el5xen" which I can
download or should I install kernel-devel source using yum?
If I used yum I would download 2.6.30.9...
yum info kernel-devel  
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Available Packages
Name       : kernel-devel
Arch       : i686
Version    : 2.6.18
Release    : 164.6.1.el5
Size       : 5.2 M
Repo       : updates
Summary    : Development package for building kernel modules to match the
kernel.
URL        : http://www.kernel.org/
License    : GPLv2
Description: This package provides kernel headers and makefiles sufficient to
build modules
           : against the kernel package.

and kernel.org has only source code from 2.6.18.1 to 2.6.18.8

Thanks

Mauro



      
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.centos.org/pipermail/centos-virt/attachments/20091126/cc399bc8/attachment-0004.html>

Hi Mauro,

My understanding of the situation is that the kernel-devel package has
the source code the kernel is compiled against. If you look at the
output of the yum info you posted the package shows version 2.6.18
which is the kernel version that CentOS is compiled against.
kernel.org is only referenced because they are the upstream creator of
the source code for that package.

So all you need to do to get the CentOS kernel source code is yum
install kernel-devel. You'll get 2.6.18 with the CentOS/RHEL patches.



-- 
Drew

"Nothing in life is to be feared. It is only to be understood."
--Marie Curie

Mauro Gatti wrote:
> Hi all,
> I am running CentOS 5.3 under xen on a VPS machine (so I have a 
> limited control on the machine)
> I am playing with openswan and KLIPS and I need to build the ipsec.ko 
> kernel module.
> I would need to download kernel source but I am really confused about 
> what source I have to get.
>
> uname -r tells:
> 2.6.18-128.7.1.el5xen
Just for the record, that is the kernel from Centos 5.4/ updates  ( and 
it is a good thing that you use it)

>
> ls /lib/modules tells:
> ls /lib/modules       
> 2.6.18-128.7.1.el5xen  2.6.18-164.2.1.el5  2.6.18-164.6.1.el5  
> 2.6.18-53.1.13.el5xen
>
> I have no sources in /usr/src/kernels
>
> Is there a source code named "2.6.18-128.7.1.el5xen" which I can 
> download or should I install kernel-devel source using yum?
the package is called kernel-xen-devel  (to be in sync with kernel-xen 
which you are using)

> If I used yum I would download 2.6.30.9...
You would not. There is no 2.6.30 in the Centos repositories

> yum info kernel-devel 
> Loaded plugins: fastestmirror
> Loading mirror speeds from cached hostfile
> Available Packages
> Name       : kernel-devel
> Arch       : i686
> Version    : 2.6.18
> Release    : 164.6.1.el5
> Size       : 5.2 M
> Repo       : updates
> Summary    : Development package for building kernel modules to match 
> the kernel.
> URL        : http://www.kernel.org/
> License    : GPLv2
> Description: This package provides kernel headers and makefiles 
> sufficient to build modules
>            : against the kernel package.
>
> and kernel.org has only source code from 2.6.18.1 to 2.6.18.8
>
you should not look at the stock kernels when using centos.