Re: [PATCH v3 0/7] User namespace mount updates

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Am 19.11.2015 um 15:37 schrieb Colin Walters:
> On Thu, Nov 19, 2015, at 02:53 AM, Richard Weinberger wrote:
> 
>> Erm, I don't want this in the kernel. That's why I've proposed the lklfuse approach.
> 
> I already said this before but just to repeat, since I'm confused:
> 
> How would "lklfuse" be different from http://libguestfs.org/
> which we at Red Hat (and a number of other organizations)
> use quite widely now for build systems, debugging etc.

Currently libguestfs has a rather huge overhead because it
boots a full virtual machine and hence a lot of communication
is needed.
With LKL you can use Linux as Library and link it to fuse.
AFAIK Richard added already a LKL backend to libguestfs. :-)

> In the end it's just running the kernel in KVM with a custom protocol,
> with support for non-filesystem things like "install a bootloader",
> and it already supports FUSE.
> 
> I'm pretty firmly with Al here - the attack surface increase here
> is too great, and we'd likely turn this off if it even did make it
> into the kernel.

Agreed. This is why I'm promoting the fuse solution.

Thanks,
//richard
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