|
Hello, everyone, I have a question about stackable
file system interface for linux.
I want to implement a encryption file system on a
floppy disk, say /dev/fd0, in Linux. I mean I just want to secure the data on
the floppy disk. This encryption file system can hook all the access to
the floppy disk. But in my wrapfs I don't know how to identify whether the
read/write operations is from/to the floppy disk. I mean how can I combine the
wrapfs driver with the floppy disk device so that I can do some en/decryption to
the data on the floppy disk. Can I identify this by the "dentry" or "inode"
structure?
In fact I think I just need to implement a simple
hook driver rather than a whole file system. But this hook driver is layered
with the file system.
Thanks in advance. Any help or advice will be appreciated.
Michael |
