Re: gjournal is not automounted any more

On Jan 3, 2009, at 10:13 AM, M. Warner Losh wrote:

> : > But my problems are with a platform that has BSD labels, and not  
> GPT
> : > labels, with a proper BSD label on the device.
> :
> : You don't have GEOM_BSD to service the DIOCGDINFO ioctl(2)
> : anymore. We need to change fsck(8) so that it doesn't work
> : only on BSD disk labels, but instead obtains the partition
> : type (if applicable) in a more generic way so that it also
> : applies to other partitioning schemes.
>
> Agreed.  Do you have a proposal for how to do that?

The best way to do it is to introduce a function
that returns the file system name/type. It could
be used by fsck(8), newfs(8), mount(8), etc to
determine which variant to invoke. This function
is best defined in libgeom, where it can get all
the data it needs from the XML. geom_part puts it
there anyway.

Doing it in userland also makes it easier to actual
read the partition and see if there's already a
file system. It's one thing to use the partition
type as a best guess, but lacking a partitioning
scheme on the disk, it may be beneficial to pursue
other avenues. Not to mention that it's better to
return the actual file system that's there than
some guess based on partition type.

Thus: I'd like to eliminate the ioctl and do all
or most of the work in user space.

Thoughts?

-- 
Marcel Moolenaar
xcllnt_at_mac.com