[DSE-Dev] Bug#834241: open-iscsi-udeb: uninstallable, depends on libmount1-udeb

[Cyril Brulebois]

Hi,

Christian Seiler <christian at iwakd.de> (2016-08-13):
> (Cc'ing util-linux and selinux maintainers.)
> 
> On 08/13/2016 07:08 PM, Cyril Brulebois wrote:
> > partman-iscsi and open-iscsi-udeb are no longer installable since the
> > latter now depends on libmount1-udeb, which was dropped in 2014 (see
> > https://bugs.debian.org/723168).
> [ summary of #723168: libmount1-udeb was dropped because it
>   had no rdep at that time, and it now depended on libselinux,
>   which didn't have an udeb at the time and still doesn't ]
> 
> Yikes. I'm terribly sorry I didn't catch that. :-(

No worries, we've had udeb installability checks for a while, and
they're here for a reason. :)

> Note that libmount1-udeb is not explicitly listed as a
> dependency, but added via substvars automatically. And since
> libmount-dev needs to explicitly have the udeb in its shlibs,
> once I saw the automatic dependency in the udeb, I assumed
> that libmount1-udeb would just exist. (I think the udeb:
> line in the shlibs file of libmount is still there, even
> though the udeb was removed.)

I filed the bug report right away to avoid forgetting about it but yeah,
the following in libmount1 is somewhat misleading (second line):
| libmount 1 libmount1 (>= 2.28~)
| udeb: libmount 1 libmount1-udeb (>= 2.28~)

> The question is: what's the best fix for that?
> 
>  - libmount is now a hard dependency of open-iscsi. It's not
>    critical functionality (it's a new safety feature to not
>    log out of sessions that still have mounted file systems,
>    which is not that important in a d-i environment), and I
>    could easily patch it out. OTOH, I seriously doubt
>    upstream will want to make libmount optional. (Especially
>    since it's from util-linux, which is really a base
>    package.)
> 
>  - OTOH, this affects more than just one package
> 
> As a short term fix I could build open-iscsi twice, once
> with and once without the libmount dependency. But I really
> don't want to carry a Debian-specific patch that removes
> libmount forever, so the proper solution would be to
> coordinate with util-linux and selinux to have both of them
> (selinux first) provide udebs for the libraries. (I doubt
> that util-linux maintainers want to build util-linux twice
> either.)
> 
> So I'd probably want to do the following:
> 
>  Step 1: build open-iscsi twice, once with libmount patched
>          out (closing this bug)
>  Step 2: file bugs against util-linux and libselinux to
>          have them build udebs (I can provide patches)
>  Step 3: make open-iscsi-udeb depend on libmount1-udeb again
> 
> Is that agreeable?

I can't comment on the libmount/libselinux bits, but looking at it from
a debian-boot@ point of view, that looks rather sane, thanks.


KiBi.
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