Xen devel - May 2005 - [RFC] Extensions to control tools for CD-ROM support

Hi all,

I noticed that there''s now a bug in bugzilla for CD-ROM support (#28).

There''s just a couple issues on how it should be exposed in the tools.
Otherwise, it''s a pretty easy patch.

1) How should a user specify whether a block device should be exposed as 
a CD-ROM?

2) Is it going to be necessary to expose block devices as other types?

3) If we''re going to move to special Xen-specific block devices, should
we also have Xen specific CD-ROMs?  Something like /dev/xcdN?

Regards,

Anthony Liguori

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> I noticed that there''s now a bug in bugzilla for CD-ROM support
(#28).
>
> There''s just a couple issues on how it should be exposed in the
tools.
> Otherwise, it''s a pretty easy patch.
There''s believed to be some sort of driver-level bug that needs fixing
here,
since it appears to be more broken than it should be.
> 1) How should a user specify whether a block device should be exposed as
> a CD-ROM?
How about a uname-style format like we have for source devs?  We could make 
the type specifier optional, e.g.

disks = [ ''phy:/dev/sda1,hda1,w'',
''phy:/dev/cdrom,cdrom:hdd,r'']
> 2) Is it going to be necessary to expose block devices as other types?
Maybe one day...  The above syntax should be flexible enough though.
> 3) If we''re going to move to special Xen-specific block devices,
should
> we also have Xen specific CD-ROMs?  Something like /dev/xcdN?
It''d be nice to retain the ability to use arbitrary hdX and sdX nodes
for now
(and possibly even after we have some device numbers assigned).

Cheers,
Mark
> Regards,
>
> Anthony Liguori
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
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