[Yaird-devel] Bug#351183: --run does not fix the disk renaming problem

[Jonas Smedegaard]

On Tue, 6 Jun 2006 14:55:50 -0700 (PDT) dean gaudet wrote:

> On Tue, 6 Jun 2006, Jonas Smedegaard wrote:
> 
> > It is wrong to assume a purely no-older-than-etch system: Imagine
> > the process of upgrading from sarge to etch...
> 
> aha... now i understand :)
> 
> what you really need is some sort of weak dependency which implies
> that if the package is already installed then it must be a specific
> rev.

Correct. But such hinting would probably be too seldom needed to warrant
the added complexity.



> > Can someone come up with a test command that does not mess with
> > actual devices, and returns true for versions of mdadm that
> > properly supports "-Ac partitions"? Or even better, a complete
> > patch for yaird?
> 
> ok cool...
> 
> well according to the mdadm changelog the -Ac partitions bug was fixed
> in 1.10.0 ... so we'd want to stick something like this into
> Templates.cfg
> 
> !case "`mdadm --version 2>&1`" in
> !        mdadm\ -\ v1.[1-9][^0-9]*)
> !                mdadm --assemble <TMPL_VAR NAME=target> --uuid
> <TMPL_VAR NAME=uuid> \ !                        <TMPL_LOOP
> NAME=components> <TMPL_VAR NAME=dev></TMPL_LOOP> !                ;;
> !        *)
> !                mdadm -Ac partitions <TMPL_VAR NAME=target> --uuid
> <TMPL_VAR NAME=uuid> !                ;;
> !esac
> 
> hmm well i need to handle mdadm v0.x too i guess... i'm trying to
> avoid added grep to the initrd.
> 
> let me know if the above is generally what you're looking for -- an 
> alternative is to test the mdadm version at mkinitrd time but i
> didn't see a way to do that without mucking in the perl (which i
> don't mind doing either).

Well, the above puts the test at boot time. That's ugly IMHO.

I'd prefer resolving mdadm features at build time. Something like this:
  * Resolve mdadm capabilities in Plan.pm
  * Set some variable (not the version, but flags each capability)
  * Use TMPL_IF in mdadm template


> i probably won't be able to test a patch for a week or two though.

Just take your time :-)


 - Jonas


-- 
* Jonas Smedegaard - idealist og Internet-arkitekt
* Tlf.: +45 40843136  Website: http://dr.jones.dk/

 - Enden er nær: http://www.shibumi.org/eoti.htm
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