[GSoC project] Implementation of ISO9660 filesystem

Sebastian Huber sebastian.huber at embedded-brains.de
Tue Apr 5 06:42:59 UTC 2011

On 04/05/2011 12:36 AM, Chris Johns wrote:
> On 4/04/11 9:22 PM, Sebastian Huber wrote:
>> one of the big problems with removable media and RTEMS is that
>> currently it is
>> impossible to unmount a file system in use.  This is a fundamental
>> flaw in the
>> RTEMS file system layer.  We should address this somehow in this
>> project (we
>> need some sort of reference counting).
> I see the need to be able to forcible remove a mount and any open files
> return an error when accessed how-ever the unmount call should be aloud
> to fail if the media is valid and in use and call is not forced.

Yes.  The problem is that there is currently no way to figure out if a file
system is in use or not.  With in use I mean that there exist some nodes that
belong to the file system.  The nodes may be not related to a file  descriptor.
 We have also root and current directory nodes (chroot() and chdir()).

Sebastian Huber, embedded brains GmbH

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