On Thu, Jul 17, 2003 at 07:32:33PM +0200, Jon Bendtsen wrote: > to this mailing list, or the linux kernel development one ? This list is probably best until you have working code. > > Spend a day playing with dmsetup, and make sure you really understand > > how to write target types. The best way to learn is to try and write > > a trivial target type, eg. a 'reverse' target that divides the device > > into chunks and then reverses their order, ie. the first logical > chunk > is > > stored in the last logical chunk of the device. This should only take > > you ~150 lines of code (start with dm-linear.c and modify). > > hmm, maybe the map into a file is a more trivial target ? No, not by a long way. > Would it be an easy target to write, such that i could play with a > dm-loop target before making the dm-crypt? I wouldn't recommend this unless you are already familiar with the VFS; I would expect there to be subtle deadlock issues. I don't think it helps your development path. - Joe