roland wrote:
partitions on loop or device-mapper devices ?

you can use kpartx tool for this.

bryn m. reeves told me, that it's probably poissible to create udev rules that will automatically create partition maps when a new loop device is setup, which is better than adding partitioning logig into dm-loop for example.

It is certainly possible to create a partitionable RAID device from a loop device. Should be possible to use nbd as well, but I can't seem to get nbd to work on 2.6.21-rc (my working system runs 2.6.17).

example:
kpartx -a /dev/mapper/loop0

# ls /dev/mapper/loop0*
/dev/mapper/loop0  /dev/mapper/loop0p1  /dev/mapper/loop0p2
/dev/mapper/loop0p3

i have seen a patch for loop.c doing this, though. search the archives for this

regards
roland





On Thu, Mar 22, 2007 at 02:33:14PM +0000, Al Viro wrote:
Correction: current ABI is crap.  To set the thing up you need to open
it and issue an ioctl. Which is a bloody bad idea, for obvious reasons...

Agreed.  What would be a right way?  Global device ala ptmx/tun/tap?
New syscall?  Something else?

 OG.
-
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