Does /sys/module/foo reflect external module name?

Does /sys/module/foo reflect external module name?

[Andrey Borzenkov]

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Is it correct that /sys/module lists module *file* names (sans -_ confusion)? 
Is it possible to find out if module is built in or truly external? The goal 
is to automate initrd build by walking from /dev/root up and pulling in all 
modules. Now missing module may mean that it is built in or that it is really 
missing :) In my case:

{pts/1}% for i in /sys/module/*
for> do
for> grep -q ${i:t} /proc/modules || echo $i
for> done
/sys/module/8250
/sys/module/i8042
/sys/module/md_mod
/sys/module/psmouse
/sys/module/tcp_bic
{pts/1}% for i in $(lsmod | awk '{print $1}')
do
[[ -d /sys/module/$i ]] || echo $i
done
Module

so it looks quite reliable up to built in modules. Is there any information 
that could be exported in sysfs (like "builtin" == 0|1)?

TIA

- -andrey
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Re: Does /sys/module/foo reflect external module name?

[Greg KH]

On Sun, Jan 29, 2006 at 07:14:47PM +0300, Andrey Borzenkov wrote:
> Is it correct that /sys/module lists module *file* names (sans -_ confusion)? 
> Is it possible to find out if module is built in or truly external? The goal 
> is to automate initrd build by walking from /dev/root up and pulling in all 
> modules. Now missing module may mean that it is built in or that it is really 
> missing :) In my case:
> 
> {pts/1}% for i in /sys/module/*
> for> do
> for> grep -q ${i:t} /proc/modules || echo $i
> for> done
> /sys/module/8250
> /sys/module/i8042
> /sys/module/md_mod
> /sys/module/psmouse
> /sys/module/tcp_bic
> {pts/1}% for i in $(lsmod | awk '{print $1}')
> do
> [[ -d /sys/module/$i ]] || echo $i
> done
> Module
> 
> so it looks quite reliable up to built in modules. Is there any information 
> that could be exported in sysfs (like "builtin" == 0|1)?

What would that be needed for?  You can always just compare the list
with /proc/modules, right?

thanks,

greg k-h

Re: Does /sys/module/foo reflect external module name?

[Andrey Borzenkov]

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On Sunday 29 January 2006 23:26, Greg KH wrote:
>
> What would that be needed for?  You can always just compare the list
> with /proc/modules, right?
>

right

> thanks,
>

thanks to you :)
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