[dm-crypt] dm-crypt.ko external kernel module

Tapas Sarangi TSarangi at trustwave.com
Tue Jul 5 23:07:27 CEST 2016


Hi Milan,

Thanks for your response. The distro I am using does not have
CONFIG_DM_CRYPT enabled. I am aware of the Kernel compilation methods for
standalone external modules and looking at your comment, it seems to be
the only way for me now.

Yes, I am also aware that DM_CRYPT will be build again a specific kernel
in order to be usable.

Thanks again.
-Tapas



On 7/5/16, 4:03 PM, "Milan Broz" <gmazyland at gmail.com> wrote:

>On 07/05/2016 07:53 PM, Tapas Sarangi wrote:
>> Is there a way to build external kernel module dm-crypt.ko that is
>> not included by default in the kernel configs ? Is there any
>> instruction on where to get the source tarball etcŠ ?
>
>While is possible (in some configurations) to build kernel module
>separately
>with the help of simple makefile and some kernel headers, it is not the
>way dmcrypt
>should be used.
>
>The reason is that code is directly dependent on internal kernel
>structures
>and also requires some other config options (like device-mapper
>infrastructure,
>kernel crypto API and particular kernel block layer settings).
>
>The dmcrypt is included in the mainline kernel, there is no need for
>separate
>source tarball, just use mainline kernel source (drivers/md/dmcrypt.c is
>the module core).
>
>Your distro must have these sources available if they are distributing
>binaries
>(it is GPL code), so you can always compile modules from it.
>
>Milan


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