[gentoo-user] Add a module post kernel config/build

[gentoo-user] Add a module post kernel config/build

[reader]

Summary:
How can I add an additional module once I've configured/built a kernel?

Details: After looking thru the handbook, especially section about
kernel config, I don't see information about how to add a module once
a kernel is built and running.

Using `genkernel all' on latest sources (linux-2.6.20-gentoo-r6) I
ended up with no `fuse' module.

Far as I know I've been getting a fuse module when using `genkernal'
on previous kernels.

What is proceedure for adding that module now?

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Re: [gentoo-user] Add a module post kernel config/build

[Boyd Stephen Smith Jr.]

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On Wednesday 18 April 2007, reader@newsguy.com wrote about '[gentoo-user]  
Add a module post kernel config/build':
> Summary:
> How can I add an additional module once I've configured/built a kernel?
>
> Details: After looking thru the handbook, especially section about
> kernel config, I don't see information about how to add a module once
> a kernel is built and running.

For in-tree modules, go into the kernel source directory, use menuconfig or 
whatever to set that configuration setting to 'm', make, make 
modules-install.  (Or, at least, that's my preferred method modulo typos.)

Changing kernel settings doesn't always require a new kernel image; here's 
a table (please view in a fixed width font.

Old New Result
N   M   Rebuild modules
N   Y   Rebuild image
M   N   No rebuild needed
M   Y   Rebuild image [1]
Y   N   Rebuild image
Y   M   Rebuild image

If the image needs rebuilding, you'll also need to rebuild all modules.  
You'll also want to re-install anything you had to rebuild.

[1]: Remove the module from /lib/modules to make sure you don't try and 
load it twice.

-- 
Boyd Stephen Smith Jr.                     ,= ,-_-. =. 
bss03@volumehost.net                      ((_/)o o(\_))
ICQ: 514984 YM/AIM: DaTwinkDaddy           `-'(. .)`-' 
http://iguanasuicide.org/                      \_/     

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[gentoo-user] Re: Add a module post kernel config/build

[reader]

"Boyd Stephen Smith Jr." <bss03@volumehost.net> writes:

> On Wednesday 18 April 2007, reader@newsguy.com wrote about '[gentoo-user]  
> Add a module post kernel config/build':
>> Summary:
>> How can I add an additional module once I've configured/built a kernel?
>>
>> Details: After looking thru the handbook, especially section about
>> kernel config, I don't see information about how to add a module once
>> a kernel is built and running.
>
> For in-tree modules, go into the kernel source directory, use menuconfig or 
> whatever to set that configuration setting to 'm', make, make 
> modules-install.  (Or, at least, that's my preferred method modulo typos.)
>
[...]

All good info and tips.  Thanks Boyd.

Etaoin Shrdlu <shrdlu@unlimitedmail.org> writes:

[...]

> I never used genkernel, but if you have the kernel source tree available, 
> you can just cd into it, adjust your configuration (using make *config), 
> then do "make && make modules_install". Only the new stuff you added 
> will be rebuilt and installed (ie, the fuse module in your case), 
> assuming you did not delete the already compiled object files inside the 
> tree.

Again... good and helpfull info... thanks.

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[gentoo-user] Re: Add a module post kernel config/build

[Alexander Skwar]

reader@newsguy.com <reader@newsguy.com> wrote:

> Using `genkernel all' on latest sources (linux-2.6.20-gentoo-r6) I
> ended up with no `fuse' module.

As far FUSE is concerned, it might be advisable to stay away from the
in-kernel FUSE and use the standalone sys-fs/fuse package. At
least ntfs3g doesn't work with the in-kernel fuse.

Alexander Skwar

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Re: [gentoo-user] Re: Add a module post kernel config/build

[Neil Bothwick]

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On Wed, 18 Apr 2007 12:37:07 +0200, Alexander Skwar wrote:

> As far FUSE is concerned, it might be advisable to stay away from the
> in-kernel FUSE and use the standalone sys-fs/fuse package. At
> least ntfs3g doesn't work with the in-kernel fuse.

Really? It works here, as do sshfs and encfs.


-- 
Neil Bothwick

Q: How many builders does it take to change a light bulb?
A: "If only it was just the light bulb......we'll have to replace the
ceiling and..........."

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[gentoo-user] FUSE (was: Add a module post kernel config/build)

[Alexander Skwar]

Neil Bothwick <neil@digimed.co.uk> wrote:

> On Wed, 18 Apr 2007 12:37:07 +0200, Alexander Skwar wrote:
> 
>> As far FUSE is concerned, it might be advisable to stay away from the
>> in-kernel FUSE and use the standalone sys-fs/fuse package. At
>> least ntfs3g doesn't work with the in-kernel fuse.
> 
> Really? It works here, as do sshfs and encfs.

Hm. Not so sure anymore. I seem to remember, that either sys-fs/ntfs3g
or sys-fs/fuse would completely refuse to build, if in-kernel fuse was
built.

But checking out the ebuilds on the CVS, I can't seem to be able to back
this statement I made.

While we're at the topic of fuse - which version is more recent?
The one in gentoo kernel or the one in the seperate package?

Alexander Skwar

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Re: [gentoo-user] FUSE (was: Add a module post kernel config/build)

[Neil Bothwick]

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On Wed, 18 Apr 2007 15:35:49 +0200, Alexander Skwar wrote:

> Hm. Not so sure anymore. I seem to remember, that either sys-fs/ntfs3g
> or sys-fs/fuse would completely refuse to build, if in-kernel fuse was
> built.

sys-fs/fuse builds the tools but not the module if the kernel module is
detected.


-- 
Neil Bothwick

When childhood dies, its corpses are called adults.

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[gentoo-user] Re: FUSE (was: Add a module post kernel config/build)

[reader]

Neil Bothwick <neil@digimed.co.uk> writes:

> On Wed, 18 Apr 2007 15:35:49 +0200, Alexander Skwar wrote:
>
>> Hm. Not so sure anymore. I seem to remember, that either sys-fs/ntfs3g
>> or sys-fs/fuse would completely refuse to build, if in-kernel fuse was
>> built.
>
> sys-fs/fuse builds the tools but not the module if the kernel module is
> detected.

I have sys-fs/fuse installed. 
# eix -I fuse
[I] sys-fs/fuse
     Available versions:  2.6.1 2.6.3
     Installed versions:  2.6.3(06:56:33 03/20/07)(-kernel_FreeBSD kernel_linux)
     Homepage:            http://fuse.sourceforge.net
     Description:         An interface for filesystems implemented in userspace.

[I] sys-fs/sshfs-fuse
     Available versions:  1.6 (~)1.7
     Installed versions:  1.7(06:38:10 02/22/07)
     Homepage:            http://fuse.sourceforge.net/sshfs.html
     Description:         Fuse-filesystem utilizing the sftp service.

 Should I have a fuse module?

/usr/src/linux/.config has:

grep -i fuse .config
# CONFIG_FUSE_FS is not set

I believe this is how I've been setup for some time.  The previous
kernel `.config' file also contains the line:
 # CONFIG_FUSE_FS is not set
but I've had no problem loading the fuse module.

In this case, after emerge -uvD world and building the new
(linux-2.6.20-gentoo-r6) kernel with genkernal I cannot load the fuse
module.  It is not present in /lib/modules/under new kernel
(...20..r6) but is present in previous modules directory

root # find /lib/modules -iname '*fuse*'
/lib/modules/2.6.19-gentoo-r4/fs/fuse.ko
/lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse
/lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse/fuse.ko

I guess I'm kind of lost here, as to what has happened...












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Re: [gentoo-user] Re: FUSE (was: Add a module post kernel config/build)

[Nistor Andrei]

On Thursday 19 April 2007, reader@newsguy.com wrote:
> Neil Bothwick <neil@digimed.co.uk> writes:
> > On Wed, 18 Apr 2007 15:35:49 +0200, Alexander Skwar wrote:
> >> Hm. Not so sure anymore. I seem to remember, that either sys-fs/ntfs3g
> >> or sys-fs/fuse would completely refuse to build, if in-kernel fuse was
> >> built.
> >
> > sys-fs/fuse builds the tools but not the module if the kernel module is
> > detected.
>
> I have sys-fs/fuse installed.
> # eix -I fuse
> [I] sys-fs/fuse
>      Available versions:  2.6.1 2.6.3
>      Installed versions:  2.6.3(06:56:33 03/20/07)(-kernel_FreeBSD
> kernel_linux) Homepage:            http://fuse.sourceforge.net
>      Description:         An interface for filesystems implemented in
> userspace.
>
> [I] sys-fs/sshfs-fuse
>      Available versions:  1.6 (~)1.7
>      Installed versions:  1.7(06:38:10 02/22/07)
>      Homepage:            http://fuse.sourceforge.net/sshfs.html
>      Description:         Fuse-filesystem utilizing the sftp service.
>
>  Should I have a fuse module?
>
> /usr/src/linux/.config has:
>
> grep -i fuse .config
> # CONFIG_FUSE_FS is not set
>
> I believe this is how I've been setup for some time.  The previous
> kernel `.config' file also contains the line:
>  # CONFIG_FUSE_FS is not set
> but I've had no problem loading the fuse module.
>
> In this case, after emerge -uvD world and building the new
> (linux-2.6.20-gentoo-r6) kernel with genkernal I cannot load the fuse
> module.  It is not present in /lib/modules/under new kernel
> (...20..r6) but is present in previous modules directory
>
> root # find /lib/modules -iname '*fuse*'
> /lib/modules/2.6.19-gentoo-r4/fs/fuse.ko
> /lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse
> /lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse/fuse.ko
>
> I guess I'm kind of lost here, as to what has happened...


Try "module-rebuild -X rebuild". Usually, after a kernel upgrade, you have to 
re-emerge all the kernel modules you have installed from portage. 
Module-rebuild does it for you ;)
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[gentoo-user] Re: FUSE (was: Add a module post kernel config/build)

[Alexander Skwar]

reader@newsguy.com <reader@newsguy.com> wrote:

> I have sys-fs/fuse installed.
> # eix -I fuse
> [I] sys-fs/fuse
>      Available versions:  2.6.1 2.6.3
>      Installed versions:  2.6.3(06:56:33 03/20/07)(-kernel_FreeBSD
>      kernel_linux)
>      Homepage:            http://fuse.sourceforge.net
>      Description:         An interface for filesystems implemented in
>      userspace.
> 
> [I] sys-fs/sshfs-fuse
>      Available versions:  1.6 (~)1.7
>      Installed versions:  1.7(06:38:10 02/22/07)
>      Homepage:            http://fuse.sourceforge.net/sshfs.html
>      Description:         Fuse-filesystem utilizing the sftp service.
> 
>  Should I have a fuse module?

If you've build fuse for the currently running kernel, then
yes, you should've.

> root # find /lib/modules -iname '*fuse*'
> /lib/modules/2.6.19-gentoo-r4/fs/fuse.ko
> /lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse
> /lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse/fuse.ko
> 
> I guess I'm kind of lost here, as to what has happened...

hm. What's unclear? You have build fuse only for this kernel
version. When you update your kernel, you'll need to rebuild
all the external modules (fuse, maybe alsa, ...). module-rebuild
is your friend.


Alexander Skwar

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[gentoo-user] Re: FUSE (was: Add a module post kernel config/build)

[reader]

Alexander Skwar <listen@alexander.skwar.name> writes:

> reader@newsguy.com <reader@newsguy.com> wrote:
>
>> I have sys-fs/fuse installed.
>> # eix -I fuse
>> [I] sys-fs/fuse
>>      Available versions:  2.6.1 2.6.3
>>      Installed versions:  2.6.3(06:56:33 03/20/07)(-kernel_FreeBSD
>>      kernel_linux)
>>      Homepage:            http://fuse.sourceforge.net
>>      Description:         An interface for filesystems implemented in
>>      userspace.
>> 
>> [I] sys-fs/sshfs-fuse
>>      Available versions:  1.6 (~)1.7
>>      Installed versions:  1.7(06:38:10 02/22/07)
>>      Homepage:            http://fuse.sourceforge.net/sshfs.html
>>      Description:         Fuse-filesystem utilizing the sftp service.
>> 
>>  Should I have a fuse module?
>
> If you've build fuse for the currently running kernel, then
> yes, you should've.
>
>> root # find /lib/modules -iname '*fuse*'
>> /lib/modules/2.6.19-gentoo-r4/fs/fuse.ko
>> /lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse
>> /lib/modules/2.6.19-gentoo-r4/kernel/fs/fuse/fuse.ko
>> 
>> I guess I'm kind of lost here, as to what has happened...
>
> hm. What's unclear? You have build fuse only for this kernel
> version. When you update your kernel, you'll need to rebuild
> all the external modules (fuse, maybe alsa, ...). module-rebuild
> is your friend.

Whats unclear is why I have to do anything extra for this kernel when
I did not in past 2.   

I don't understand why it didn't get built with `genkernel all' as in
previous 2 kernels.

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Re: [gentoo-user] Re: FUSE (was: Add a module post kernel config/build)

[Neil Bothwick]

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Hello reader@newsguy.com,

> > hm. What's unclear? You have build fuse only for this kernel
> > version. When you update your kernel, you'll need to rebuild
> > all the external modules (fuse, maybe alsa, ...). module-rebuild
> > is your friend.  
> 
> Whats unclear is why I have to do anything extra for this kernel when
> I did not in past 2.   

You probably ran module-rebuild without realising it covered fuse too.

You could avoid all this hassle by enabling fuse in your kernel. Out of
tree drivers cause extras hassle and should only be used when the
in-kernel drivers are not suitable for your needs.


-- 
Neil Bothwick

He's dead, Jim. Just like your career.

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Re: [gentoo-user] Add a module post kernel config/build

[Mike Williams]

On Wednesday 18 April 2007 10:15:12 reader@newsguy.com wrote:
> Summary:
> How can I add an additional module once I've configured/built a kernel?
>
> Details: After looking thru the handbook, especially section about
> kernel config, I don't see information about how to add a module once
> a kernel is built and running.
>
> Using `genkernel all' on latest sources (linux-2.6.20-gentoo-r6) I
> ended up with no `fuse' module.
>
> Far as I know I've been getting a fuse module when using `genkernal'
> on previous kernels.
>
> What is proceedure for adding that module now?

genkernel --menuconfig all

You can also add --no-clean and --no-menuconfig to stop it clearing out 
already compiled code, but you run the risk to getting symbols messed up 
(quite unlikely though).

-- 
Mike Williams
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Re: [gentoo-user] Add a module post kernel config/build

[Etaoin Shrdlu]

On Wednesday 18 April 2007 11:15, reader@newsguy.com wrote:

> Summary:
> How can I add an additional module once I've configured/built a
> kernel?
>
> Details: After looking thru the handbook, especially section about
> kernel config, I don't see information about how to add a module once
> a kernel is built and running.
>
> Using `genkernel all' on latest sources (linux-2.6.20-gentoo-r6) I
> ended up with no `fuse' module.
>
> Far as I know I've been getting a fuse module when using `genkernal'
> on previous kernels.
>
> What is proceedure for adding that module now?

I never used genkernel, but if you have the kernel source tree available, 
you can just cd into it, adjust your configuration (using make *config), 
then do "make && make modules_install". Only the new stuff you added 
will be rebuilt and installed (ie, the fuse module in your case), 
assuming you did not delete the already compiled object files inside the 
tree.
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