loopback device

[simon guinot]

Hello,

I am interested to add loopback device support in hald.
For example hald could store volumes information for a multi partition
disk image and permit a mount operation...

A use case could be:

modprobe loop max_part=8
losetup /dev/loop0 /tmp/disk_img_with_partitions
=> some hal stuff and automount

After a quick loop at the hald/linux/blockdev.c, it appear that a device
need a parent to be handled by hald. As a loopback device depend from
any bus, the /sys/block/loop?/device symlink file is missing...

May be it is possible to handle a loopback device in a quite same way as
a md device ?

I have attached a test patch to this mail. It make loopback devices and
partitions available in the hal database... and a mount operation based
on this information can be performed.

Of course my patch is naive and probably wrong. The point is that i know
almost nothing about the hald internals. So... any help to put me on the
right track is welcome.

Thanks in advance.

Simon




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