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Old 11-18-2010, 02:42 AM   #1
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File System for embedded system

In new project, that is one embedded linux system, I have to find one file system or solution to fulfill our requirements:

1- file system must be read only,it means user of system can not change any data on file system.(I have found squashfs for this need!but more guidance about such filesystems will be appreciate)
2- user (call it,malicious user!) can not mount this filesystem on another machine,it means I can pass some hardware information such as motherboard serial number or another unique info to this file system so that file system can be mount only on this it, LOCK based on hardware.

These has been main concerns in this weekend

Thanks for any help or guidance
Old 11-18-2010, 03:09 AM   #2
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I feel it would be foolish to use a known filesystem, and rely on you being the only one using it. better perhaps to explode an image into a block of ram mounted read only. Access could be turned off in the boot process. To really achieve (2) above, write your own proprietary filesystem. And watch out for the scenario where you upgrade a cpu or the like and can't read your own filesystem!
Old 11-19-2010, 09:38 AM   #3
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Possible Solution

If you are open to looking at commercially available solutions, Datalight's file systems would fit your criteria

Reliance Nitro can be mounted read only. It would be simple to node-lock the drive to the machine through the file system, and it wouldn't be readable on another machine.
Old 11-19-2010, 03:12 PM   #4
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Thanks for your attention
Unfortunately our budget is limit for now.If I can not find one file system with these features we have to patch SquashFS to justify our requirements.
Thanks for more guidance or information.


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