[EMAIL PROTECTED] wrote:
>   i have sending the problem specification related to USB.Plz go thru it
> and solve my problems.give some guideline for it.
>         actually i want know how to start the code  for it.i have gone
> thru a lot of site on internet,but the picture is still not clear.i want
> to have crystal clear picture on design and implementation of USB General
> Mass Storage subclass.
>         i will be very greatful if u guide me regarding my problem.

Read the USB specification. Read the usb-storage code of the Linux kernel. And
find out, that your problem is already solved:
- USB connection: done (usb-storage kernel module)
- block device: done (it's seen as scsi device)
- encrypted/compressed storage/steganographic structure: done (use one of the
many filesystem implementations which support your requirements - this
probably won't be ext2fs)

What do you still have to do? Find a filesystem. Maybe write a module unless
linux already supports this filesystem. Write some documentation concerning
all these points. Write a script which automatically loads the right modules
if such a device is connected to a PC (i.e. write a setup script which checks
if the modules are in place and defines some module magic in modules.conf).

Done.

PS: please don't ask "put linux usb knowledge into my head w/out me doing
anything" questions.

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