Bug#783990: efivarfs is a separate fs and needs moutning

[The Wanderer]

On 2021-07-16 at 13:36, Ian Jackson wrote:

> The Wanderer writes ("Re: Bug#783990: efivarfs is a separate fs and
> needs moutning"):
> 
>> Wouldn't testing the existence of
>> 
>> /lib/modules/`uname -r`/kernel/fs/efivarfs/efivarfs.ko
>> 
>> be enough, and probably more reliable?
> 
> I'm doubt very much it would be more reliable.  What if the kernel
> reorganises its modules ?

That possibility hadn't even occurred to me, but now that you point it
out, I drop this suggestion.

>> (I'm assuming that the test which skips because "fstype not
>> available" comes before the one which skips because "already
>> mounted", and that's why I saw the warning even though it seems to
>> be up and working on my machine.)
> 
> Yes, the tests are indeed in that order.  I think you have it
> mounted now because of the apparmor fixup you found.

I was initially not sure that was going to be relevant after all,
because I was expecting AppArmor to be a thing that has to be constantly
running in order to be effective, and there's no such process visible
that I can see - but apparmor shows up in dmesg, et cetera, so I must
have been expecting wrong.

> The change to mountkernfs was ineffective on your system for the same
> reason it was ineffective on mine, but the apparmor workaround means
> you don't see the effects since apparmor has got it mounted by the
> time you log in.

Makes perfect sense.

>> I need to do some other things for a while, so I won't be
>> rebooting again immediately, but I'll probably test this sometime
>> this afternoon.
>> 
>> 
>> My current biggest concern about this is:
>> 
>> --
> 
> No objections then ? :-)  (I think you may have missed a bit...)

Heh. That line was a leftover of when I was going to raise the question
of why the "fstype not available" test was even being reached, given the
"already mounted" test, before I realized that it must be simply a
matter of test order.

-- 
   The Wanderer

The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man.         -- George Bernard Shaw

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