RFC: disk geometry via sysfs

[Seewer Philippe]

Hello all!

I don't want to start another geometry war, but with the introduction of
the general getgeo function by Christoph Hellwig for all disks this
simply would become a matter of extending the basic gendisk block driver.

There are people out there (like me) who need to know about disk
geometry. But since this is clearly post 2.6.16 I prefer to ask here
before writing a patch...

Q1: Yes or No?
If no, the other questions do not apply

Q2: Where under sysfs?
Either do /sys/block/hdx/heads, /sys/block/hdx/sectors, etc. or should
there be a new sub-object like /sys/block/hdx/geometry/heads?

Q3: Writable?
Under some (weird) circumstances it would actually be quite nice to
overwrite the kernels idea of a disks geometry. This would require a
general function like setgeo. Acceptable?

Regards
Philippe Seewer
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